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Battery For Electric Wheelchair

Battery Pack Basic Characteristic

3.2 Battery Pack Basic Characteristic

No.	Item	Specification	Notes
1	Nominal Capacity	6.4Ah	Min Capacity 6400mAh
2	Nominal Voltage	24V
3	Energy	153.6Wh
4	AC Impedance	≤180mΩ	At 1kHz with 100%SOC
5	Charging Limited Voltage	29.4V	4.2V/cell
6	Discharge End Voltage	19.25V	2.75V/cell
7	Standard Charging Method	CC-CV and CC is 1.32A	charge end with 8h or current drops to 0.02C.
8	Max. Charge Current	3.3A
9	Standard Discharging Method	1.32A	Constant Current Discharge with 0.2C
10	Max. Discharge Current	15.0A	Continuous Discharge(Temperature: 25±2℃)
11	Cycle Life	≥800cycles	0.5C Charge, 1.0C discharge and Capacity Retention ≥80% of initial capacity
12	Operating Temperature	0℃ ～ 45℃	Charging Operating
12	Operating Temperature	-20℃ ～ 60℃	Discharging Operating
13	Storage Characteristic	1 month	Temperature: -20℃ ～ 60℃
		3 months	Temperature: -20℃ ～ 45℃
		One year	Temperature: -20℃ ～ 25℃
14	Relative Humidity for Storage	45% ～ 85%
15	Shipment Voltage	25.2 ～ 28.0V	3.6～4.0V/cell
16	Dimensions(LWH)	max: 1207586mm
17	Weight	Approx. 870±30g

6. BMS/PCM Specification

No.	Item	Specification	Notes
1	Model	7S-2PCM
2	Charge Method	CC -CV	/
3	Max. Charge Current	5.0A	/
4	Continuous Discharge Current	15.0A	/
5	Overcharge Protection Threshold	4.25±0.025V	/
6	Overcharge Protection Release Conditions	4.15±0.05V	/
7	Over Discharge Protection Voltage Threshold	2.7±0.03V	/
8	Over Discharge Protection Release Conditions	3.0±0.03V	/
9	Over Discharge Current Protection	25-45A
10	Short-Circuit Protection	Yes	/
11	Communication protocol	/	/
12	Temperature protection	/	/
13	Short-Circuit Protection Release Conditions	Remove Load or Charge
14	PCM On-Resistance	≤65mΩ	/
15	PCM Consumption Current	≤50.0uA	/