BMS current detection and overcurrent protection circuit

An overcurrent protection circuit and current detection technology, applied in the direction of measuring current/voltage, only measuring current, measuring electricity, etc., achieves the effects of fast response speed, improved stability and safety, and small sampling error

Inactive Publication Date: 2017-05-10
HUIZHOU BNET TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Similarly, the overcurrent protection and start-up recovery circuit for a solar photovoltaic controller disclosed in the Chinese patent document CN201310701829.X has a technical solution of first amplifying the current signal and then comparing it, which also has certain limitations. Furthermore, its The technical solution is to use the same phase proportional amplifier, its accuracy and anti-interference ability are not as good as the differential operational amplifier

Method used

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  • BMS current detection and overcurrent protection circuit
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Embodiment Construction

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...

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Abstract

The present invention discloses a BMS current detection and overcurrent protection circuit. The BMS current detection and overcurrent protection circuit is characterized in that the BMS current detection and overcurrent protection circuit comprises a battery pack, a relay switch, a current sampling resistor, a load, a current sampling module, an overcurrent protection module and an MCU (micro control unit); the current sampling module collects and amplifies working current on the current sampling resistor and inputs the working current to the MCU (micro control unit); the overcurrent protection module judges the magnitude of the working current on the current sampling resistor, and outputs low-level signals to the MCU (micro control unit) when the working current exceeds a specified value, and the MCU (micro control unit) responds immediately, performs protection, and switches off the relay switch; and therefore, overcurrent protection can be enabled, and key components in the protection circuit will not be damaged by the impact of large current.

Description

technical field [0001] The invention relates to the field of battery management systems, in particular to a BMS current detection and overcurrent protection circuit. Background technique [0002] The most basic and important function of the battery management system for electric vehicles, energy storage systems, or electric tools is to collect weak signals of the system, such as voltage signals, current signals, and temperature signals. The implementation of detection of physical signals of the application system and the purpose of timely response protection under abnormal conditions ensure the safe and effective operation of the system. BMS current acquisition generally converts the current signal into a voltage signal through a shunt or a Hall sensor, and then processes the voltage signal, conventionally using a front-end analog integrated IC or a dedicated current acquisition chip for processing, and then transmitting the amplified signal to the micro control unit MCU , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R19/00G05B19/042
CPCG01R19/0092G01R31/382G05B19/042
Inventor 贺亮
Owner HUIZHOU BNET TECH CO LTD
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