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A kind of balancing circuit and its design method and battery management system

A technology of balancing circuit and design method, applied in the field of control, can solve problems such as poor thermal protection performance, and achieve the effect of realizing thermal protection and avoiding overheating and burning

Active Publication Date: 2022-05-03
BEIJING CHJ AUTOMOTIVE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an equalization circuit and its design method and battery management system to solve the technical problem of poor thermal protection performance in the equalization circuit of the existing battery module

Method used

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  • A kind of balancing circuit and its design method and battery management system
  • A kind of balancing circuit and its design method and battery management system
  • A kind of balancing circuit and its design method and battery management system

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] see figure 1 , figure 1 A schematic structural diagram of an equalization circuit provided by an embodiment of the present invention. Such as figure 1 As shown, an equalization circuit is applied to the thermal protection of the battery module, including:

[0050] A control subcircuit 110, the control subcircuit 110 includes a control terminal 111, a first terminal 112 and a second terminal 113, the control terminal 111 is used to access a co...

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Abstract

The present invention provides an equalization circuit and its design method and battery management system, wherein the equalization circuit includes: a control sub-circuit, including a control terminal, a first terminal and a second terminal, the control terminal is used for accessing a control signal, and the control signal is used for Control the conduction state between the first end and the second end; the first series branch includes a first balancing resistor and a first thermistor connected in series, and the first series branch is connected in series between the first end and the battery module between the signal input terminals of the first battery cell; the second series branch includes a second balancing resistor and a second thermistor connected in series, and the second series branch is connected in series between the second terminal and the first battery module Between the signal input terminals of the two battery cells. In this way, if the current in the series branch increases and the temperature of the equalizing resistor rises, the resistance of the thermistor increases rapidly with the temperature rise, so that the current in the series branch decreases, and the temperature of the equalizing resistor decreases accordingly, realizing Thermal protection for battery modules.

Description

technical field [0001] The invention relates to the technical field of control, in particular to an equalizing circuit, a design method thereof, and a battery management system. Background technique [0002] Nowadays, cars are very popular, especially electric cars. Therefore, the safety of battery modules is related to the safety of cars. In the equalization circuit of the existing battery module, the realization of the equalization function is realized by controlling the on-off of the internal integrated control element by the analog front-end, so when the control element is overvoltage or other reasons cause breakdown, it will lead to a large current Flowing through the equalizing resistor causes the temperature of the equalizing resistor to rise. After the equalizing resistor continues to heat up to a certain extent, it will cause the battery to catch fire on your circuit board, which will affect the safety of the battery module and even the car. [0003] It can be seen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/22B60L3/00B60L58/24
CPCB60L3/0046Y02T10/70
Inventor 马东辉张广栋王海星姜云启
Owner BEIJING CHJ AUTOMOTIVE TECH CO LTD
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