BATTERY PACK BURN-IN TEST SYSTEM AND METHOD
First Claim
Patent Images
1. A battery pack burn-in test system comprising:
- first and second interconnection circuits for electrically interconnecting a first and a second battery pack respectively to the system;
a data communication bus for coupling to respective battery management integrated circuits (ICs) of the first and second battery packs; and
a system management unit coupled to the data communication bus;
wherein the system management unit controls a charging of the first battery pack during a burn-in test from a discharging of the second battery pack;
and further comprising a first adjustable power supply electrically connected in series with the second electrical interconnection circuit and coupled to the data communication bus for maintaining a selected voltage difference between a series voltage of the second battery pack and the first adjustable power supply on the one hand, and a voltage of the first battery pack on the other hand such as to maintain a constant charging current for the first battery pack in a constant current charging state under the control of the system management unit; and
wherein the system management unit is further configured for maintaining the series voltage of the second battery pack and the first adjustable power supply at a constant value and allows the charging current to gradually decrease in a constant voltage charging state following the constant current charging state.,
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Abstract
A battery pack burn-in test system comprising first and second interconnection circuits for electrically interconnecting a first and a second battery pack respectively to the system; a data communication bus for coupling to respective battery management integrated circuits (ICs) of the first and second battery packs; and a system management unit coupled to the data communication bus. The system management unit may control a charging of the first battery pack during a burn-in test from a discharging of the second battery pack.
46 Citations
18 Claims
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1. A battery pack burn-in test system comprising:
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first and second interconnection circuits for electrically interconnecting a first and a second battery pack respectively to the system; a data communication bus for coupling to respective battery management integrated circuits (ICs) of the first and second battery packs; and a system management unit coupled to the data communication bus; wherein the system management unit controls a charging of the first battery pack during a burn-in test from a discharging of the second battery pack; and further comprising a first adjustable power supply electrically connected in series with the second electrical interconnection circuit and coupled to the data communication bus for maintaining a selected voltage difference between a series voltage of the second battery pack and the first adjustable power supply on the one hand, and a voltage of the first battery pack on the other hand such as to maintain a constant charging current for the first battery pack in a constant current charging state under the control of the system management unit; and wherein the system management unit is further configured for maintaining the series voltage of the second battery pack and the first adjustable power supply at a constant value and allows the charging current to gradually decrease in a constant voltage charging state following the constant current charging state., - View Dependent Claims (2, 9, 10, 11, 12, 17)
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3. (canceled)
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4. (canceled)
- 13. A method for burn-in testing of battery packs, the method comprising charging a first battery pack from a discharging of a second battery pack and using a first adjustable power supply for maintaining a selected voltage difference between a series voltage of the second battery pack and the first adjustable power supply on the one hand, and a voltage of the first battery pack on the other hand, such as to maintain a constant charging current for the first battery pack in a constant current charging state under the control of the system management unit and maintaining the series voltage of the second battery pack and the first adjustable power supply at a constant value and allowing the charging current to gradually decrease in a constant voltage charging state following the constant current charging state.
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15. (canceled)
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16. (canceled)
Specification