Battery pack active fuse control apparatus
AssigneeContemporary Amperex Technology (Hong Kong) Limited
InventorsJing Yang, Zhaoguang Wang, Qiandeng Li
Life of this patent
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Abstract
A battery pack active fuse control apparatus includes a battery management system and a shunt resistor, where the battery management system includes a short-circuit current detect circuit and a short-circuit current process circuit that are constantly powered. The shunt resistor and an active fuse are connected in series with a power supply loop of a battery pack. The short-circuit current detect circuit is connected to the shunt resistor and the short-circuit current process circuit. The short-circuit current process circuit is connected to the active fuse. The short-circuit current process circuit, upon receiving the short-circuit overcurrent signal, controls the active fuse to break.
Claims15
A battery pack active fuse control apparatus, comprising:
- a shunt resistor, wherein the shunt resistor and an active fuse are connected in series with a power supply loop of a battery pack;
- and
- a battery management system;
- wherein:
- the battery management system comprises a short-circuit current detect circuit and a short-circuit current process circuit that are constantly powered;
- the short-circuit current detect circuit is connected to the shunt resistor and the short-circuit current process circuit, and the short-circuit current process circuit is connected to the active fuse;
- the short-circuit current detect circuit is configured to sample current flowing through the shunt resistor to obtain a shunt current, and when the shunt current exceeds a set threshold, output a short-circuit overcurrent signal to the short-circuit current process circuit, and the short-circuit current process circuit, upon receiving the short-circuit overcurrent signal, controls the active fuse to break;
- and
- the short-circuit current detect circuit comprises a current sampling chip and a voltage comparator, the current sampling chip is connected to the shunt resistor and the voltage comparator, and the voltage comparator is connected to the short-circuit current process circuit.
A battery pack active fuse control apparatus, comprising:
- a shunt resistor, wherein the shunt resistor and an active fuse are connected in series with a power supply loop of a battery pack;
- and
- a battery management system;
- wherein:
- the battery management system comprises a short-circuit current detect circuit and a short-circuit current process circuit that are constantly powered;
- the short-circuit current detect circuit is connected to the shunt resistor and the short-circuit current process circuit, and the short-circuit current process circuit is connected to the active fuse;
- the short-circuit current detect circuit is configured to sample current flowing through the shunt resistor to obtain a shunt current, and when the shunt current exceeds a set threshold, output a short-circuit overcurrent signal to the short-circuit current process circuit, and the short-circuit current process circuit, upon receiving the short-circuit overcurrent signal, controls the active fuse to break;
- and
- the short-circuit current process circuit comprises a delay chip and a latch, the delay chip is connected to the short-circuit current detect circuit and the latch, and the latch is connected to a power supply chip module, a digital signal detect module, and a drive module of the active fuse.
Dependencies are inferred from the claim text.