Patent AU-2019435043-B2 (AU)
Title: High voltage battery cluster, and overcurrent protection circuit and switch box thereof
Inventor: ZHOU JIANJIE
IPC: H02J7/00
Filed: 2019-12-26
Granted: 2021-11-04
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(54) Title: HIG-VOLTAGE BATTERY CLUSTER AND OVER-CURRENT PROTECTION CIRCUIT AND SWITC BOX 
THEREFOR 
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EE m-th string of battery modules 
(57)Abstract: Provided area high-voage battery cluster and an over-current protection circuit and a switch box therefor. Theover-cur
rent protection circuit comprises a first fuse module and a second fuse module. Since current-time curves of the two fuse modules are 
different, when an over-current fault occurs in a high-voltage battery cluster, one fuse module opens the circuit of the high-voltage 
battery clusterbefore the otherfuse module, such that the high-voltage battery cluster is notdestroyed by a large current impact under 
the over-current fault. In addition, compared with the prior art in the present application, a high-voltage battery cluster is disconnected 
from a circuit loop by only one fuse module when an over-current fault occurs in the high-voltage battery cluster, such that the problem 
in the prior art of current change rate superposition caused by the simultaneous fusing of two fuses is avoided. Therefore. during the 
N disconnection process. the current change rate inthe circuit loop is lowerthanthe currentchange rate when the two fuses simultaneously 
perform fusing in the prior art thereby reducing the current impact and the voltage impact in a current loop.
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