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33140 15Ah LFP Li Ion Battery 3.2 V lithium rechargeable battery
Lithium-ion battery cell specification document
Model: -33138-HE-15Ah-LFP
| edit | Han Yunfeng | customer name | |
| examine and verify | Liu jianping | Customer model | |
| ratify | Xiong Jian | Customer return: | |
| date of issue | 2022-10-20 | ||
| Release version | |||
Revise the resume
| edition | Revised page number | revision note | date | edit |
| A | — | First edition release | 2022-10-20 | Han Yunfeng |
1. essential information
1.1 Definition
| term | definition |
| product | The "product" in this specification refers to the 15Ah 3.2V rechargeable lithium iron phosphate cylindrical battery produced by the lithium battery. |
| Peripheral ambient teerature | The ambient teerature of the battery. |
Battery management system (BMS) | An effective tracking and control system used by customers to monitor and record the operating parameters of the product throughout the term of service. The tracking and recording parameters include but are not limited to voltage, current, teerature, etc., to control the operation of the product and ensure that the operating environment and operating conditions of the product coly with the provisions of this specification. |
| Battery teerature | The teerature of the cell measured by the teerature sensor connected to the battery, the choice of the teerature sensor and the measurement line are agreed upon by the lithium battery and the customer. |
| New battery status | It refers to the state of the battery within 7 days from the manufacturing date of the product. |
| Charging ratio | The ratio of the charge current to the capacity value of the battery measured by the battery management system. For exale, when the battery capacity is 15Ah and the charging current is 3A, the charging rate is 0.2C; when the battery capacity is 12Ah and the charging current is 2.4A, the charging rate is 0.2C. |
| recurrence | The battery is charged in one cycle according to the specified charge and discharge standard. The cycle includes a short period of normal charging or a combination of regenerative charging and discharge processes, during which there is sometimes only normal charging but no regenerative charging. A discharge can be formed by a combination of some partial discharges. |
| date of manufacture | The manufacturing date of the battery can be traced through the identification code on the cell envelope. |
| open circuit voltage | No battery voltage measured without any load and circuit. |
| Standard charging | The charging mode as described in Clause 3.2 of this specification. |
| Standard discharge | Coliance with the discharge current of 0.5C described in Article 3.3 of this specification and the discharge mode of minimum 2.5V voltage described in Article 2.3.1 of this Specification. |
| Charging Status (SOC) | All linear relationships of the battery charging capacity status measured in aere hours or in watt hours without load. For exale, if the state of the capacity of 15.0Ah is regarded as 100% SOC, the SOC is 0% when the capacity is 0Ah. |
| teerature rise | The conditions specified in this specification, such as the increase of the cell teerature during charging or discharge. |
| measurement unit | "V" (Volt) volt (V), voltage unit "A" (Aere) Aere (A), current unit "Ah" (Aere-Hour) Aere-hours (Ah), load unit "Wh" (Water-Hour) watt-hours (Wh), energy units "m Ω" (MilliOhm) milliohm (m Ω), resistance unit "℃" (degree Celsius) Degree Celsius (℃), in teerature unit "mm" (millimetre) mm (mm) in length "s" (second) seconds (s), time unit "Hz" (Hertz) Hertz (Hz), in frequency unit |
1.2 Scope of application
This specification specifies the technical requirements, test methods and precautions for cylindrical lithium ion cells.
1.3 Product classification
This cylindrical type rechargeable lithium ion cell.
1.4 Model name
-33138-HE-15Ah-LFP .
1.5 Battery assembly
Single battery: assembled into a specific size according to the specific application, which is coleted by the battery pack and the electronic system
Performance management, thermal management, and safety management of the battery pack.
Assembly system: ensure that the electrode surface is clean, free of oil and dust before connection, otherwise it may lead to poor contact and affect the electricity
Pool performance, to ensure that the battery electrode and the line connection is tightened, otherwise it will affect the battery performance.
2. Product electrical performance index
.1 2 Summary
| order number | project | standard | remarks |
| 2.1.1 | nominal capacity | 15Ah | 25±3℃,0.5C DC 3.65V to 2.5V |
| 2.1.2 | minimum capacity | 14.5Ah | |
| 2.1.3 | nominal voltage | 3.2V | |
| 2.1.4 | working voltage | 2.5V~3.65V 2.0V~3.65V | teerature T>0℃ teerature T≤0℃ |
| 2.1.5 | Battery diameter | 33.4±0.1mm | For graphic structure details, see attached Figure 1 |
| Battery height | 139.6±0.5mm | ||
| 2.1.6 | Battery internal resistance (1 KHz) | ≤3.0mΩ | New battery status (15% SOC) |
| 2.1.7 | Battery weight | 298g±10 g | N.A. |
| 2.1.8 | Shipping voltage | ≥3.2V | Test open circuit voltage within seven days of shipment received battery, new battery status (15% SOC) |
| 2.1.9 | Shipping pressure difference | According to customer requirements | |
| 2.1.10 | Operating teerature (charging) | 0~45℃ | Refer to Section 2.2 |
| 2.1.11 | Operating teerature (discharge) | -20~60℃ | Refer to Section 2.3 |
| 2.1.12 | Normal teerature cycle (25 ± 2℃) | ≥2000cycles | 0.5C charge / 0.5C charge, attenuated to 80% of the rated capacity |
| ≥1500cycles | 0.5C charge / 1.0C charge, attenuated to 80% of the rated capacity |
2.2 Charging mode / parameters
| order number | project | standard | remarks |
| 2.2.1 | Standard charging current | 0.5C | 25±2℃ |
| 2.2.2 | Maximum sustainable charging current | 1C.0 | 25±2℃ |
| 2.2.3 | Standard charging voltage | 3.65V | 25±2℃ |
| 2.2.4 | Charging cut-off current | 0.75A | Constant voltage charge cut-off current is 0.05C |
| 2.2.5 | Standard charging teerature | 25±2℃ |
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| 2.2.6 | Absolute charging teerature (Battery teerature) | 0~45℃ | Regardless of the charging mode the cell is, charging is stopped once the teerature of the cell exceeds the absolute charging teerature range |
| 2.2.7 | Absolute charging voltage | Maximum of 3.65V | Regardless of the charging mode the cell is, the charging is stopped once the cell voltage exceeds the absolute charging voltage range |
2.3 Charging mapping unit: C-Rate
| SOC | 0% | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 95% | 100% | |
| teerature 1 | 0⁓10℃ | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| teerature 2 | 10⁓20℃ | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| teerature 3 | 20⁓45℃ | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
2.4 Discharge mode
| order number | project | standard | remarks |
| 2.3.1 | Standard discharge current | 0.5C | 25±2℃ |
| 2.3.2 | Maximum sustainable discharge current | 2C | 25±2℃,SOC＞30% |
| 2.3.3 | Discharge cut-off voltage | 2.5V 2.0V | teerature T>0℃ teerature T≤0℃ |
| 2.3.4 | Standard discharge teerature | 25±2℃ | |
| 2.3.5 | Peak discharge current | 4C | 25 ± 2℃, with discharge time <5S, and SOC> 30% |
| 2.3.6 | Absolute discharge teerature | -20~60℃ | Whether the cell is in the continuous discharge mode or the pulse discharge mode, the discharge stops if the cell teerature exceeds the absolute discharge teerature |
3. test condition
3.1 Standard test conditions
If no special requirements, the room teerature in this specification is 25 ± 2℃, the product test conditions are: teerature 25 ± 2℃, humidity 1590% RH, and atmospheric pressure 86kPa 106 kPa.
3.2 Standard charging:
"Standard charging" means that under the standard test conditions, the cell is charged to 0.5C at 3.65V, and then charged to a cut voltage of 0.05C at a constant voltage of 3.65V.
3.3 Standard discharge
"Standard discharge" means that the cell is discharged to 2.5V at a constant current of 0.5C under the standard test conditions.
4. Electrical performance test
| order number | project | standard | test method |
| 4.1 | Communication internal resistance | ≤3mΩ.0 | New battery status (15% SOC), measured at 1000 Hz. |
| 4.2 | initial capacity (25℃) | ≥15Ah | A) The cell is charged according to the standard charging method and stand for 30min; Bin) Discharge to 2.5V capacity with 0.5I1 (A) current and stand for 30min; Repeat c) steps a) ~c) 3 times. When the capacity change of two consecutive tests is less than 1%, the test can be finished in advance and the results of the last test time can be taken. |
| 4.3 | 2C room teerature multiplier discharge (25℃) | 90% * Initial capacity | A) The cell is charged according to the standard charging method and stand for 30min; Bin) discharge 3I1 (A) current to 2. A V capacity and stand for 30min; |
| 4.4 | Room teerature multiplier charge (25℃) | 97% * Initial capacity | A) Discharge to 2.5V at 0.5I1 (A) current, and stand for 30min; BY) Charge only to 3.65V with 0.5I1 (A) current, and stand for 30min; And c) discharge with 1I1 (A) current to 2.5V capacity; |
| 94% * Initial capacity | A) Discharge to 2.5V at 0.5I1 (A) current, and stand for 30min; Bb) Charge with 1I1 (A) current, stand for 30min; And c) discharge with 1I1 (A) current to 2.5V capacity; | ||
| 4.5 | -10℃ discharge | 70% * Initial capacity | A) The cell is charged according to the standard charging method and stand for 30min; Bar) Hold at-10 ± 2℃ for 20h and discharge at 1.8V at 0.5I1 (A) at-10 ± 2℃ (and discharge the resulting value at 2.0V capacity); |
| 4.6 | -20℃ discharge | 60% * Initial capacity | A) The cell is charged according to the standard charging method and stand for 30min; Bar) Hold at-20 ± 2℃ for 20h and discharge to 1.8V at 0.5I1 (A) current at-20 ± 2℃ (discharge the resulting value to 2.0V capacity); |
| 4.7 | 55℃ high teerature discharge | 100% * Initial capacity | A) The cell is charged according to the standard charging method and stand for 30min; Bb) shelving at 55 ± 2℃ for 5h, discharging to 2.5V capacity at 0.5I1 (A) current at 55 ± 2℃; |
| 4.8 | Charge retention with capacity recovery capacity | Charge holding capacity of 92% * Initial capacity Recovery capacity is 95% * Initial capacity | A) The cell is charged according to the standard charging method and stand for 30min; BB) Hold at 55 ± 2℃ for 7 days, then hold at 25 ± 2℃ for 5h, discharge to 2.5V capacity with 0.5I1 (A) current, and measure the charge holding capacity; C) Stand for 30min, then charge according to the standard charging method, and stand for 30min; D) At 25 ± 2℃, discharge with 0.5I1 (A) current to 2.5V capacity, metering and recovery capacity; |
Charge holding capacity of 95% * Initial capacity Recovery capacity is 97% * Initial capacity | A) The cell is charged according to the standard charging method and stand for 30min; BB) After 28 days of storage at 25 ± 2℃, 0.5I1 (A) current discharges to 2.5V capacity at 25 ± 2℃, measuring the charge holding capacity; C) Stand for 30min, then charge according to the standard charging method, and stand for 30min; At d) 25 ± 2℃, discharge at 0.5I1 (A) current to 2.5V capacity, and measure the recovery capacity. | ||
| 4.9 | Normal teerature cycle life (25 ± 2℃) | Capacity retention rate after 2,000 times is 80% rated capacity | A) Discharge to 2.5V at a current of 0.5I1 (A) and withhold for 30min; B) The cell is charged according to the standard charging method and stand for 30min; c)0.5I1 (A) The current discharge to 2.5V, record the discharge capacity for 30min; D) d) repeat b) ~c) work step; E) until the three consecutive capacity retention rate is below 80% of the rated capacity stops; |
| Capacity retention rate after 1500 times is 80% rated capacity | A) Discharge to 2.5V at a current of 0.5I1 (A) and withhold for 30min; B) The cell is fully charged according to 0.5I1 (A) standard system and shelved for 30min; c)1.0I1 (A) The current discharge to 2.5V, record the discharge capacity for 30min; D) d) repeat b) ~c) work step; E) until the three consecutive capacity retention rate is below 80% of the rated capacity stops; |
5. Safety and reliability
The following safety experiments shall be carried out with forced exhaust and explosion-proof measures, and the cells shall be filled according to the standard charging mode, and then the following safety tests shall be conducted.
| order number | project | standard | test method |
| 5.1 | Short circuit test | No fire, no explosion | A) Put the positive and negative electrodes of the cell through the external short circuit for 10min, and the total resistance of the external line is 20 ± 5m Ω, and observe for 1h. |
| 5.2 | over-charging | No fire, no explosion | A) 1I1 (A) constant current charging is 1.5 times (5.4V) of the termination voltage or stop charging after reaching 1h, and observe for 1h. |
| 5.3 | overdischarge | No fire, no explosion | A) 1I1 (A) Stop discharge to 0V or discharge time to 1.5h and observe for 1h. |
| 5.4 | decline | No explosion, no fire | A) Drop the positive or negative electrode of the cell freely down from a height of 1.2m to the cement floor once. |
| 5.5 | Squeeze test | No fire, no explosion | Extrusion direction: pressure perpendicular to the cell plate; the extrusion surface area is greater than the size of the squeezed cell; download squeeze pressure when the voltage reaches 0V or deformation reaches 15% or 13 kN extrusion pressure for 1min. Each cell receives only one extrusion; observe for 1h after the test. |
| 5.6 | Seawater immersion | No explosion, no fire | Submerge the cell in 3.5%NaCl solution (mass fraction, simulated seawater coosition at room teerature) for 2h, and the water depth should coletely not exceed the cell; observe for 1h. |
| 5.7 | cyclone | No explosion, no fire, no leakage | The cell is fully charged according to the standard charging method; put into the low pressure box, adjust the pressure to 11.6kPa, the teerature is room teerature; stand for 6h; stand at room teerature for 1h and observe the appearance change. |
| 5.8 | Heating test | No explosion, no fire | The cell was heated in the ancient air drying chamber from room teerature to 130 ± 2℃ at a rate of 5 ± 2℃ / min for 30min, then the heating was turned off and observed for 1h. |
6. Product end of life management
The service life of the batteries is limited. Customers should establish an effective tracking system to monitor and record batteries and capacity for each lifetime. When the battery is 70% rated (25℃). Any violation of this requirement will exet the lithium battery from the product quality assurance liability according to the Product Sales Agreement and this Specification.
7. Application conditions
Customers shall ensure that the following battery-related application conditions are strictly followed:
7.1 The customer shall be equipped with a battery management system to closely monitor, manage and protect each battery.
7.2 The customer shall keep the colete monitoring data of the battery operation as a reference for the division of product quality responsibilities. Without the colete monitoring data within the service period of the battery system, the lithium battery shall not bear the responsibility for product quality assurance.
7.3 Avoid the battery from reaching the overdischarge state. When the battery voltage is lower than 1.8V, the interior of the battery may be permanently damaged, and at this time, the product quality assurance responsibility of the lithium battery fails. According to the discharge standard of this specification, when the discharge cut-off voltage is below 2.5V, the internal energy consution of the system is reduced to a minimum, and the sleep time is extended before recharging. The customer needs to train the user to recharge in the shortest possible time to prevent the battery from entering the overdischarge state.
7.4 If the battery is expected to be stored for more than 90 days, the SOC should be adjusted to about 30% and 50%.
7.5 The battery shall avoid charging under the low teerature conditions prohibited in this specification (including standard charging, fast charging, emergency charging and regenerative charging), otherwise unexpected capacity reduction may occur. The battery management system shall be controlled according to the minimum charge and regeneration charge teerature. It is prohibited to charge at teeratures lower than those specified in this specification, otherwise, lithium battery shall not be liable for quality assurance.
7.6 The heat dissipation of the cell should be fully considered in the design of the electric box. Due to the cell or battery overheating damage caused by the heat dissipation design of the electric box, the lithium battery will not bear the quality assurance responsibility.
7.7 The waterproof and dustproof problems of the electric cell should be fully considered in the design of the electric box, and the electric box must meet the waterproof and dustproof grades stipulated by the relevant national standards. Due to the damage of the cell or battery (such as corrosion, rust, etc.), lithium battery does not bear the responsibility for quality assurance.
8. Safety precautions
8.1 Never immerse the battery in water.
8.2 It is forbidden to expose batteries to fire or to a high teerature environment exceeding the teerature conditions specified in this specification, otherwise it may lead to fire. In any normal use situation, the teerature of the battery cell should not exceed 65℃. If the battery cell teerature in the battery exceeds 65℃, the battery management system needs to close the battery and stop the battery operation.
8.3 No short circuit at the positive and negative poles of the battery, otherwise the strong current and high teerature may cause personal injury or fire. Because the positive and negative electrodes of the battery are exposed to the plastic protective cover, there should be sufficient safety protection to avoid short circuit during the assembly and connection of the battery system.
8.4 Connect the positive and negative electrodes of the battery in strict accordance with the labels and instructions, and reverse charging is prohibited.
8.5 No battery overcharging, otherwise, it may cause battery overheating and fire accidents. In the battery installation and use, the hardware and software need to be ilemented multiple overcharge failure safety protection.
8.6 After charging according to this specification, the normal charging should be finished. When the continuous charging time exceeds the reasonable time limit, the battery overheating phenomenon may cause thermal runaway and fire. A previous timer shall be installed for protection. Once the charging current reaches the overshoot state and cannot be terminated, the timer will work to terminate the charging.
8.7 The customer shall safely secure the battery to the solid plane and safely bind the power cord in place to avoid friction causing arcs and sparks.
8.8 It is strictly prohibited to connect plastic batteries or plastic. Incorrect electrical connection mode may cause overheating during battery use.
8.9 When the electrolyte leaks, avoid skin and eye contact with the electrolyte. In case of contact, clean the area with plenty of clean water and seek out to your doctor for help. No person or animal shall swallowing any part or substance contained in the battery.
8.10 Try to protect the battery from mechanical vibration, collision and pressure iact, otherwise the battery may short circuit, high teerature and fire.
8.11 Inappropriate termination of charging may occur during battery charging. For exale, charging beyond the allowed charging time, charging is terminated if the charging voltage is too high, or charging is terminated if the charging current is too strong. The above phenomenon is defined as "inappropriate termination of charging". When this occurs, it may mean leakage of the battery system or failure of some coonents. Continuing to charge the battery before the root cause is found and coletely resolved may cause the battery overheating or fire. When the above phenomenon occurs, the battery management system should use the automatic lock function to prohibit the subsequent charging, and remind the user to return the vehicle loaded with the battery to the dealer for system maintenance. The battery can only be recharged after a corehensive inspection by certified technicians to determine the root cause and be thoroughly solved and iroved.
8.12 The test experiment described in the safety and reliability test in this specification may cause battery fire or explosion. The test experiment can only be conducted in a professional laboratory by professionals equipped with appropriate protective equipment. Otherwise, it may lead to serious personal injury and property loss.
9. Storage advice
9.1 If stored for a long time (over 3 months), the cell shall be stored in a teerature range of 10~30℃, low humidity and no corrosive gas;
9.2 It is recommended to charge and discharge once every three months (2 cycles), and must charge and discharge once every six months (two cycles). The charge and discharge mode is as follows: in 25 ± 3℃ environment, 0.5C constant current discharge to 2.5V, static 30min,0.5C constant current constant pressure charge to 3.65V cut-off current 0.05C, static 30min,0.5C constant current discharge to 2.5V, let 30min,0.5C constant current charge to about 30% SOC;
9.3 Based on the protection of the cells, a good storage environment is required.
10. Dangerous type
The customer is aware of the following potential hazards during the use and operation of the batteries:
10.1 The operator may be damaged by chemicals, shock or arc during operation. Although the human body responds differently to the DC and alternating current, the DC voltage higher than 50V causes equally serious damage to the human body, so the customer must take a conservative posture in the operation to avoid the current damage.
10.2 There is a chemical risk coming from the electrolyte in the battery.
10.3 When operating the battery and selecting personal protective equipment, customers and their eloyees must consider the above potential risks; prevent accidental short circuit, causing arc, explosion or thermal runaway.
