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Overcurrent protection circuit breaker

An overcurrent protection and circuit breaker technology, which is applied in the protection of overcurrent response, emergency protection circuit devices, and automatic disconnection emergency protection devices, etc., can solve the problems of low versatility of overcurrent protection devices.

Active Publication Date: 2020-11-27
欣旺达惠州动力新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide an overcurrent protection circuit breaker to solve the problem that the existing battery system uses a fuse as an overcurrent protection device, which makes the overcurrent protection device of the battery system have low versatility

Method used

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Embodiment 1

[0024] refer to figure 1 , is a schematic diagram of the connection between the overcurrent protection circuit breaker and the battery system in this embodiment. Among them, the battery system is a battery system with a power supply of 48V, K1 is the main circuit switch, and RL is the load of the battery system, that is, the electrical equipment.

[0025] Manual locking has already connected the first contact 4 and the second contact 5 before the battery system leaves the factory and is installed on the vehicle. When the vehicle control K1 is closed, the load RL of the battery system will work. When an emergency occurs in the whole vehicle, such as vehicle collision, load short circuit or other safety risks, the battery system circuit current is too large or other reasons need to actively disconnect the battery system main circuit, if at this time the vehicle control module (such as BMS) If the disconnection of control K1 fails and there is no emergency circuit breaker, it m...

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Abstract

The invention discloses an overcurrent protection circuit breaker. The circuit breaker comprises a power supply device, a processing unit, a current detection unit, a first contact, a second contact and a switching-on and switching-off assembly. The current detection unit is used for acquiring the current value of a main loop in real time, generating a signal and sending the signal to the processing unit; when the processing unit judges that the current value reaches a preset protection current value and the duration reaches preset protection time, the processing unit controls the switching-onand switching-off assembly to cut off the first contact and the second contact so as to disconnect the main loop, thereby playing a role in protecting a battery system. The processing unit comprisesa parameter setting module, and the parameter setting module modifies the preset protection current value and the preset protection time according to different battery systems and load conditions, sothe overcurrent protection circuit breaker provided by the invention meets the requirements of different battery systems under different working conditions, the universality of the overcurrent protection circuit breaker provided by the invention is improved, and the problem of low universality of an overcurrent protection device due to the adoption of a fuse as the overcurrent protection device issolved.

Description

technical field [0001] The invention relates to the battery field, in particular to an overcurrent protection circuit breaker. Background technique [0002] With the vigorous development of electric vehicles in the new energy field, the safety of electric vehicle battery systems has been paid more and more attention, and measures to prevent battery packs from catching fire have become more and more abundant. In a traditional battery pack, the general overcurrent protection device is a fuse, but the overcurrent protection current value of the fuse is unique and cannot be changed. Open circuit, so the versatility of the fuse is low. When the cell specifications or load conditions of the battery system change, it is necessary to re-select fuses of different specifications to meet the different overcurrent protection current and time requirements of the battery system. Contents of the invention [0003] The main purpose of the present invention is to provide an overcurrent pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18H02H3/08H02H3/00B60L3/00B60L3/04
CPCH02H7/18H02H3/08H02H3/006B60L3/0046B60L3/04
Inventor 欧阳文斌文黎阳王华文王明旺
Owner 欣旺达惠州动力新能源有限公司
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