Battery management system and battery switching matrix interlocking circuit and interlocking method thereof

A battery management system and battery switching technology, which is applied in the direction of circuit, secondary battery, secondary battery repair/maintenance, etc., can solve the problem of low fault tolerance, achieve the effects of improving fault tolerance, IO expansion, and avoiding false conduction

Pending Publication Date: 2018-03-13
SHENZHEN KELIE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a battery management system and its battery switching matrix interlocking circuit and interlocking method to solve the technical problem of low fault tolerance in the above-mentioned prior art

Method used

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  • Battery management system and battery switching matrix interlocking circuit and interlocking method thereof
  • Battery management system and battery switching matrix interlocking circuit and interlocking method thereof
  • Battery management system and battery switching matrix interlocking circuit and interlocking method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The principle of BMS sampling using switch matrix is ​​as follows: figure 1As shown, when it is necessary to sample the battery voltage of the first string of batteries, select BAT00 and BAT01, divide the voltage through resistors R1, R2, R3, and R4, and then sample the battery voltage through the converter connected to the AD port. Similarly, the first string of batteries needs to strobe BAT01 and BAT02, and so on, until the last string is sampled. In this embodiment, it is necessary to avoid false conduction of any two channels of BAT00, BAT02, BAT04...and even channels of BAT01, BAT03, BAT05...and false conduction of odd channels during the selection process, because the false conduction here will cause the battery to short circuit through the switch, lightly Then burn the switch, damage the BMS, and cause the battery to short-circuit, heat up and catch fire, etc., the consequences are very serious.

[0025] Such as figure 2 As shown, it is a battery switch matrix...

Embodiment 2

[0040] This embodiment is modified on the basis of Embodiment 1. Due to the limitation of the number of strings in the embodiment, this embodiment is proposed in order to increase the number of strings while ensuring the fault tolerance capability. For this reason, this embodiment uses the decoder The three chip selection signals are designed for fault tolerance. The chip selection signals are one high and two low, that is, CS1 is high, and CS2 and CS3 are low. Only in this way can the decoder work normally.

[0041] In this embodiment, the main differences of the battery switching matrix interlock circuit used in the battery management system are:

[0042] Such as image 3 Shown, first and second decoding unit (21,22) comprise two decoders (211,212; Or 221,222) respectively; Two decoders (211,212 of first decoding unit 21 ) respective first signal receiving ports (A, B, C) are connected to the first control output ports (A1, A2, A3), and the respective first signal receiving...

Embodiment 3

[0057] In this embodiment, the circuit of the above-mentioned embodiment 1 or the circuit of embodiment 2 can be regarded as a group, so as to expand, and at the same time ensure the proper fault tolerance, so that there will be no odd or even channels in the sampling process The phenomenon of two channels being turned on at the same time, using the interlocking relationship in the group to expand, can break through the limitation of the number of battery strings, and carry out effective and safe expansion by collecting the number of battery strings with a single BMS module.

[0058] For this reason, in the present embodiment, switch gating module 2 can be provided with two or more, this switch gating module 2 is preferably the switch gating module in the interlock circuit in embodiment 2, certainly, also can be The gating module in embodiment 1; In the present embodiment, as Figure 4As shown, taking the switch gating modules of the interlock circuit in Embodiment 2 as a grou...

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Abstract

The invention discloses a battery management system and a battery switching matrix interlocking circuit and interlocking method thereof. The interlocking circuit comprises a processing module, a switch gating module and a changeover switch matrix which are sequentially connected, wherein the changeover switch matrix is controlled to be switched on/off by the switch gating module, the switch gatingmodule comprises a first decoding unit and a second decoding unit, a first signal output port of the first decoding unit is connected with control ends of m first types of changeover switches in thechangeover switch matrix, and a second signal output port of the second decoding unit is connected with control ends of n second types of changeover switches in the changeover switch matrix. A digitaldecoding method is employed, the interlocking strings are increased, moreover, the multi-string fault-tolerance capability is improved, a plurality of batteries (at least two) are prevented from being simultaneously conducted by a grouping mode, the interference resistance of change gating is achieved, and only one path of output at the same moment is enabled to be effective in design.

Description

technical field [0001] The invention relates to the field of battery management, in particular to a battery management system and a battery switching matrix interlock circuit and interlock method thereof. Background technique [0002] When new batteries such as lithium-ion batteries are used in series, in order to ensure the safe use of batteries, it is generally necessary to configure a battery management system (BMS). The function of BMS is mainly used to detect the voltage of battery cells in real time. There are currently two mainstream solutions for cell voltage acquisition solutions in the market. One is a dedicated integrated chip provided by a chip manufacturer. One chip samples 12 strings for BMS developers. Combine and use. The other is to use a switch matrix for battery cell switching and sampling. Among them, the number of batteries sampled by the integrated chip is not flexible enough, and there are many disadvantages in use and wiring. The switch matrix solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48H01M10/42
CPCH01M10/425H01M10/482H01M2010/4271Y02E60/10
Inventor 王涛吕宝良张志国胡运平
Owner SHENZHEN KELIE TECH
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