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A bipolar battery stack

A bipolar battery and bipolar electrode technology, applied in battery pack parts, secondary battery manufacturing, circuits, etc., can solve problems such as battery stack short circuit, and achieve the effects of improving reliability, convenient operation and simple structure

Active Publication Date: 2020-09-08
BEIJING HAWAGA POWER STORAGE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid injection and sealing device can not only effectively complete the electrolyte injection, but also effectively solve the problem of short circuit inside the battery stack caused by the liquid connection of the electrolyte through the liquid injection channel.

Method used

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  • A bipolar battery stack
  • A bipolar battery stack
  • A bipolar battery stack

Examples

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Embodiment Construction

[0072] The present invention will be further described through embodiments below in conjunction with the accompanying drawings.

[0073] figure 1 It is a three-dimensional schematic diagram of a bipolar battery stack according to the present invention. The bipolar battery stack 1 includes a pole piece group 2, an insulating plate 3, a fixing plate 4, an assembly plate 5, and a liquid injection and sealing device 6, and the insulating plate 3, the fixing plate 4 and the Assemble board 5. The electrode post 7 of the pole piece group 2 protrudes from the through hole of the assembly plate 5 . The assembly plate 5 is fastened by bolts and nuts, so as to complete the assembly of the entire bipolar battery stack.

[0074] figure 2 It is a schematic cross-sectional view of the pole piece group of the bipolar battery stack according to the present invention. The pole piece group 2 includes unipolar electrode pieces 8 on the upper and lower sides and a plurality of bipolar electr...

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Abstract

The invention provides a bipolar battery stack. A tubular liquid injection channel is formed by a monopolar sheet and a liquid port located at the same position on the bipolar sheet, and a liquid injection channel is arranged in the liquid injection channel of the bipolar cell stack. and sealing device. The liquid injection and sealing device includes a cylinder with a liquid injection port. The cylinder is a movable cylinder that can rotate or move up and down. The rotation or movement of the movable cylinder realizes the connection between the liquid injection port and the bipolar electrode sheet The communication or staggering of the electrolyte flow channel; or, the cylinder is a fixed cylinder fixed in the liquid injection channel, and the liquid injection port of the fixed cylinder is communicated with the electrolyte flow channel of the bipolar electrode sheet, and in the fixed cylinder A movable member is provided, and the liquid injection port can be opened or closed through the rotation or up and down movement of the movable member in the fixed cylinder. The use of the liquid injection and sealing device can not only effectively complete the injection of the electrolyte, but also effectively solve the problem of the internal short circuit of the battery stack caused by the liquid contact of the electrolyte through the liquid injection channel.

Description

technical field [0001] The invention relates to the field of bipolar batteries, in particular to a bipolar battery stack with a liquid injection and sealing device. Background technique [0002] The bipolar battery stack of the bipolar battery consists of two unipolar electrode sheets, several bipolar electrode sheets, a separator, and an electrolyte. A bipolar electrode sheet refers to an electrode sheet with two polarities after coating the positive electrode material layer and the negative electrode material layer on both sides of the bipolar plate. There is a unipolar electrode sheet behind the material layer or the negative electrode material layer. Since each battery unit of a bipolar battery stack consisting of a bipolar plate, a positive electrode material layer, a separator layer, a negative electrode material layer and another bipolar plate has an independent electrochemical structure, it can be obtained by adding bipolar electrode sheets The number of battery ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/02H01M2/36H01M10/04
CPCY02E60/10Y02P70/50
Inventor 张晓虎陈永翀王玉伟张彬韩越谢晨张艳萍
Owner BEIJING HAWAGA POWER STORAGE TECH
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