Dynamic natural adaptive charging method

• US 10,298,047 B2
• Filed: 07/29/2017
• Issued: 05/21/2019
• Est. Priority Date: 01/29/2015
• Status: Active Grant

• Current Assignee: Ebull Power Innovations Limited
• Original Assignee: Ebull Power Innovations Limited
• Inventors: Yuan, Bo, Yuan, Guanghui
• Primary Examiner(s): Berhanu, Samuel
• Application Number:
  US15/663,737
• Publication Number:
  US 20180062411A1
• Time in Patent Office: 661 Days
• Field of Search: 320129
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: H02J 7/00711 with introduction of pulses during the charging process
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

A dynamic natural adaptive charging method, comprises: (a) connecting a charger with a main charging circuit of a lithium battery pack to be charged and a BMS communication interface, regulating an excitation voltage of the charger to a voltage of the lithium battery pack to be charged, and switching on the charger and the lithium battery pack to be charged when the output voltage of the charger is equal to the voltage of the battery pack; (b) increasing the excitation voltage by 0.6 to 1V for charging until the charging current is decreased to a first set value; (c) repeating step (b) until voltages of all single batteries in the lithium battery pack to be charged reach a second set value; and (d) regulating the excitation voltage to a nominal voltage of the lithium battery pack to be charged and charging with the maximum output current of the charger.

Claims

1. A dynamic natural adaptive charging method, comprising the following steps:

(a) connecting a charger with a lithium battery pack to be charged, regulating an excitation voltage of the charger to be equal to a voltage of the lithium battery pack to be charged, and switching on the charger and the lithium battery pack to be charged;

(b) increasing the excitation voltage to perform repair charging until the charging current is decreased to a first set value, wherein increasing the excitation voltage means progressively increasing the excitation voltage at an amplitude of 0.6 to 1V;

(c) repeating step (b) until voltages of all single batteries in the lithium battery pack to be charged reach a second set value; and

(d) regulating the excitation voltage to a nominal voltage of the lithium battery pack to be charged;

charging with a maximum current driving capability of the charger; and

progressively decreasing the charging current at an amplitude of 5% to 10% when the voltages of the single batteries reach a cut-off charging voltage, until the charging current of the single batteries is decreased to a cut-off charging current.

2. The dynamic natural adaptive charging method according to claim 1, wherein in step (b), the repair charging is a pulse charging process including a pause and discharge.

3. The dynamic natural adaptive charging method according to claim 1, wherein in step (b), the first set value of the charging current is 1 A, and the excitation voltage is progressively increased when the charging current is less than 1 A.

4. The dynamic natural adaptive charging method according to claim 2, wherein in step (b), the first set value of the charging current is 1 A, and the excitation voltage is progressively increased when the charging current is less than 1 A.

5. The dynamic natural adaptive charging method according to claim 1, wherein in step (b), in the pulse charging process, a charging pulse width is 1000 to 2000 ms, a discharging pulse width is 5 to 10 ms and a pause pulse width between charge and discharge is 100 to 200 ms.

6. The dynamic natural adaptive charging method according to claim 2, wherein in step (b), in the pulse charging process, a charging pulse width is 1000 to 2000 ms, a discharging pulse width is 5 to 10 ms and a pause pulse width between charge and discharge is 100 to 200 ms.

7. The dynamic natural adaptive charging method according to claim 1, wherein in step (c), the second set value of voltages of the single batteries is 3.0 to 3.3V.