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Dual-polarity battery stack

A bipolar battery and bipolar electrode technology, which is applied in secondary battery manufacturing, battery components, circuits, etc., can solve problems such as battery stack short circuit, improve reliability, avoid internal short circuit, and facilitate operation Effect

Active Publication Date: 2019-06-11
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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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 dual-polarity battery stack. Liquid holes formed in same positions on a single pole plate and a bipolar plate form a tubular liquid injection passage, a liquid injection and sealing device is arranged in the liquid injection passage of the dual-polarity battery stack and comprises a cylinder, a liquid injection hole is formed in the cylinder, the cylinder is a movable cylinder capable of rotating or moving upwards and downwards, and connection or staggering of the liquid injection hole and an electrolyte runner of the dual-polarity battery is achieved by rotation or moving of the rotatable cylinder; or the cylinder is a fixed cylinder, the fixed cylinder is fixedly arranged in the liquid injection passage, a liquid injection hole of the fixed cylinder communicateswith the electrolyte runner of the dual-polarity electrode plate, a movable piece is arranged in the fixed cylinder, and opening or closing of the liquid injection hole is achieved by rotation or upward-downward moving of the movable piece in the fixed cylinder. By the liquid injection and sealing device, electrolyte injection can be effectively completed, and the problem of short circuit in the battery stack caused by an electrolyte passing through the liquid injection passage also can be effectively solved.

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 Applications(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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