Method for detecting inner connecting resistor of power battery pack

A power battery pack and resistance detection technology, applied in the direction of measuring resistance/reactance/impedance, measuring devices, measuring electrical variables, etc., can solve problems such as reducing battery pack production efficiency, increasing production cost, and damaging battery pack products

Active Publication Date: 2014-12-24
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

This new technology helps quickly determine if there are any connections between different components within an electric vehicle's batteries that may be causing issues or malfunctions during use. It does this by measuring how well these parts work together when connected properly, rather than damaging them permanently. Additionally, it provides technical means to monitor their overall effectiveness over time through its ability to accurately identify potential problems before they become more severe.

Problems solved by technology

This patented technical solution described in the patents relates to improving the durability and reliance of connecting electrical components within an electricity storage device (ESP). To ensure proper functioning of these devices, there are strict requirements that must be met before they start working properly. These standards require accurate measurement of contact resistance over many types of conductive material used inside the ESP's housing or other locations where external connections occur frequently throughout their lifetime. Current solutions involve extra hardware such as specialized testing equipment or expensive spare wire harnesses, making them difficult to implement in practical applications.

Method used

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  • Method for detecting inner connecting resistor of power battery pack

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Embodiment Construction

[0024] In order to make the purpose of the invention, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0025] For ease of understanding, the internal connection resistance of the power battery pack to be tested will first be described below.

[0026] see figure 1 , the power battery pack to be tested contains a plurality of identical or different battery modules 10 , and each battery module 10 is provided with more than one single battery 12 . Since there is connection resistance (including the self-resistance of each connector and the contact resistance generated by different connection methods) on the connection route 20

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Abstract

The invention discloses a method for detecting an inner connecting resistor of a power battery pack. The method includes the following steps that (1) the alternating current inner resistance Zi of each battery cell is tested before battery modules are assembled; (2) the alternating current inner resistance Zm of each battery module is tested after the battery modules are assembled and before the battery pack is assembled, and the inner connecting resistor comprehensive value Rci of each battery module is calculated through the Zi and the Zm; (3) constant-current discharge is conducted on the power battery pack, the direct current resistance Di of each battery module and the direct current resistance Dp of the battery pack are calculated, and the connecting resistor comprehensive value Rco between the modules is calculated through the Di and the Dp; (4) the inner connecting resistor comprehensive value Rc of the battery pack is calculated through the formula Rc=Rci+Rco; (5) the inner connecting resistor of the power battery pack is evaluated through the Rc. According to the method for detecting the inner connecting resistor of the power battery pack, the structure of the battery pack does not need to be damaged, the Rc can be calculated effectively and conveniently, and therefore support is provided for the connecting resistor design of the battery pack and the electrical property and health condition judgment.

Description

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Claims

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Application Information

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Owner CONTEMPORARY AMPEREX TECH CO
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