NO.	Items	Criteria			Testing method
1	Rated Capacity	50Ah		Rest for 1 hour after fully charged, then discharge with 0.33C current until the battery reaches the discharge cutoff voltage. Repeat above process for three times, if the discharge time is not less than 120 minutes, you can stop and define the Discharging current*time value (Ah) as battery capacity.
2	Minimum Capacity	50Ah
3	Internal resistance	≤40mΩ		50% battery SOC state frequency of 1 KHZ ac resistance tester
	Short circuit protection	Yes		Connect the positive and negative of this battery pack through a lead with the resistance less than 5mΩ.
5	Cycle life (DOD100%)	≥2000cycle		Discharge with the current of 0.33C until it can’t discharge, and then rest it for 1h. Charge the battery following CC(0.33C)/CV(14.6V) mode to full capacity, and then rest it for 1h. Repeat above process until full charged capacity is no more than 80% of normal value. Accumulated times is defined as cycle life.
6	Discharge Temperature Characteristics	-20℃	≥70%	At 25±5℃ discharge the battery with the current of 0.33C to the cut-off voltage and record charge capacity. Store the battery at various temperatures for 2h and discharge the battery with 0.33C to the cut-off voltage.
		-0℃	≥80%
		25℃	≥100%
		55℃	≥95%
7	Charge Retention ability	Residual capacity≥80%		Charge the battery to full capacity and store it for 28days, and then discharge it with 0.33C to the cut-off voltage.
		Recovery capacity≥90%

3. Protective circuit specification

NO.	Items	Content	Specification
1	Over charge	Over-charge protection for each cell	3.80±0.03V
		Over-charge release for each cell	3.60±0.05V
		Over-charge release method	Under the release voltage
2	Over discharge	Over-discharge protection for each cell	2.00±0.05V
		Over-discharge release for each cell	2.30±0.05V
		Over-discharge release method	Charging recovery
3	Over current	Discharge over current protection	170~220A
		Protection delay time	10~40ms
		Over current release method	Release after cutoff the load.
4	Short	Yes.	Remove after the short circuit automatic recovery
5	Battery temperature	Charge over temperature	Protection @65±5℃
		Charge over temperature	Release @50±5℃
		Discharge over temperature	Protection @65±5℃
		Discharge over temperature	Release @50±5℃

4. Dimension drawing

5. Battery operation instruction

Charging current: Do not surpass the largest charging current that specification stipulated
Charging voltage: Do not surpass the highest limited voltage that specification stipulated
Charging temperature: within temperature scope that specification stipulated
Charge with constant current, then with the constant voltage, no reverse charge, which is dangerous
Special note: Short time doesn't affect the use of the battery overcharge too, but for a long period of time overdischarge or over charge can affect the function of the battery failure, or the battery can't use permanent, appear serious safety hazards, need long time floating please use the recommended floating model specification.Battery when not in use for a long time, because of its own self-discharge characteristics can also cause discharge, to prevent the occurrence of a discharge, battery should maintain a certain capacity, maintain the voltage at 50% state of SOC.

6. Application

Product Tags:

4kw solar system with battery

deep cycle battery for solar storage

Inquiry Cart 0