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A detection device for cell expansion of a battery pack and a power battery pack

A battery expansion and detection device technology, which is applied in secondary battery testing, batteries, secondary batteries, etc., can solve problems such as missing the timing of timely processing, false false images, and failure to reflect problems, so as to avoid the reduction of energy density, Compact structure, avoiding the effect of explosion

Active Publication Date: 2020-09-11
ZHEJIANG FOREVER NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing detection methods for the cell pressure in the power battery pack are overall detection, that is, to detect the pressure of the cell pack, so what is detected is the average expansion degree of multiple cells in the entire cell pack value
When the volume of a single cell expands, the pressure data detected by the overall pressure sensor not only cannot reflect the problem, but will also cause false impressions and miss the opportunity to deal with it in time

Method used

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  • A detection device for cell expansion of a battery pack and a power battery pack
  • A detection device for cell expansion of a battery pack and a power battery pack

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Effect test

Embodiment 1

[0038] The present invention provides a detection device for cell expansion of a battery pack and a power battery pack containing the detection device. The detection device for cell expansion of a battery pack can monitor the volume expansion of a single cell in the battery pack in real time , So as to be able to make more timely countermeasures to avoid problems such as explosion and combustion caused by excessive pressure between the cells.

[0039] See figure 1 The illustrated structure diagram of a detection device for cell expansion of a battery pack (hereinafter referred to as the detection device), the detection device includes a fixing frame 1 and a cell expansion detection unit 2. The cell expansion detection unit 2 is arranged on the fixing frame 1 and is used to detect the volume expansion of a single cell in the battery pack. Here, the volume expansion of a single cell is an increase in volume including at least an increase in the circumference of the cell.

[0040] Th...

Embodiment 2

[0068] This embodiment provides a power battery pack, the power battery pack is provided with a battery pack and any one of the above-mentioned detection devices. Because the detection device has the function of fixing the battery cell and has a compact structure, it can not only monitor the single unit in the battery pack in real time. The expansion of the battery cell can also reduce the casing of the power battery pack and increase the energy density of the battery pack.

[0069] In a preferred embodiment, the power battery pack can also be provided with pressure sensors 4 on both sides of the battery pack as required. The pressure sensors 4 are used to detect the lateral pressure of the entire battery pack to avoid excessive lateral pressure of the battery pack. Cause damage to the battery.

[0070] The above-mentioned power battery pack equipped with a pressure sensor can simultaneously monitor the expansion of a single cell in the battery pack and the overall pressure of the ...

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Abstract

The invention relates to an apparatus for detecting the expansion of cells of a battery pack and a power battery pack. The detection device comprises a fixed rack and a cell expansion detection unit.The fixed rack comprises a first installation plate and a second installation plate, which are oppositely arranged. The first installation plate is provided with two installation holes, wherein the distance between two installation holes is smaller or equal to the normal thickness of cells. The cell expansion detection unit comprises an annular metal belt, an elastic part, and a tensile force sensor. The annular metal belt goes through two installation holes. The part, which is arranged between the first installation plate and the second installation plate, of the annular metal belt forms a connection part, and the rest part forms a cell wrapping part. One end of the elastic part is connected to the connection part of the annular metal belt, the other end is connected to the tensile forcesensor, and the tensile force sensor is fixedly connected to the second installation plate. The provided apparatus can monitor the volume expansion of a single cell in a battery pack in real time, andthe expansion situation of the single cell in the battery pack can be represented more accurately and reliably.

Description

Technical field [0001] The present invention relates to the technical field of power automobile batteries, in particular to a detection device for battery cell expansion and a power battery pack. Background technique [0002] With the rapid growth of the number of new energy vehicles in my country's automobile industry, lithium-ion power batteries have become the key to the development of electric vehicles. The current power battery is often installed on a power vehicle in the form of a power battery pack. The power battery pack generally includes an external casing and a battery pack arranged in the casing. [0003] During the life cycle of the power battery, as the charge and discharge cycle progresses, the battery volume will expand in a certain proportion. When the battery volume expands to a certain extent, the shell ruptures and the electrolyte flows out, which may cause major safety issues such as combustion and explosion. . [0004] Regarding the expansion of the power batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/48
CPCH01M10/4207H01M10/4285H01M10/482H01M2220/20Y02E60/10
Inventor 鲍添增朱修锋陈昌平刘俊军刘金辉
Owner ZHEJIANG FOREVER NEW ENERGY TECH CO LTD
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