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Bipolar electrode sheet, bipolar battery contain that electrode sheet, and maintenance and regeneration method thereof

A bipolar electrode and bipolar battery technology, applied in the direction of bipolar electrode, active material electrode, electrolyte/reactant regeneration, etc., can solve the problem of electrolyte leakage, low injection efficiency, and difficult to control the consistent injection volume problems such as the uniformity of the electrolyte distribution

Active Publication Date: 2019-01-15
BEIJING HAWAGA POWER STORAGE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems with this method are: first, the liquid injection efficiency is low; second, the electrolyte is easy to leak from the side of the battery cell when the battery cell is packaged; third, it is difficult to control the consistency of the liquid injection volume in each battery cell Uniformity of sex and electrolyte distribution
[0004] In addition, the laminated parts of the battery cells of the bipolar battery are relatively tightly pressed, which makes it difficult to inject the electrolyte between the bipolar electrodes, and the larger the area of ​​the bipolar electrode sheet, the more difficult it is to inject the electrolyte. Therefore, for The electrolyte can penetrate and fully infiltrate into the bipolar electrode. The existing method is to place the bipolar battery injected with the electrolyte for a long time, which greatly affects the production efficiency of the bipolar battery
In addition, the tightly pressed bipolar electrodes are not easy to discharge the gas generated inside the bipolar battery during the charging and discharging process, which affects the cycle performance of the bipolar battery.

Method used

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  • Bipolar electrode sheet, bipolar battery contain that electrode sheet, and maintenance and regeneration method thereof
  • Bipolar electrode sheet, bipolar battery contain that electrode sheet, and maintenance and regeneration method thereof
  • Bipolar electrode sheet, bipolar battery contain that electrode sheet, and maintenance and regeneration method thereof

Examples

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Embodiment 1

[0082] This example provides several versions of the bipolar plate of the present invention.

[0083] figure 1 is a schematic cross-sectional view of a bipolar plate according to the present invention. Both sides of the bipolar plate 1 are provided with an electrolyte flow channel 101, as shown in figure (a), or, one side of the bipolar plate 1 is provided with an electrolyte flow channel 101, as shown in figure (b) and figure (c) , Figure (d) shown. In this embodiment, the electrolyte flow channel is a concave groove to facilitate the flow of the electrolyte, and the cross section of the groove is square, as shown in Figure (a) and Figure (b); or, the cross section of the groove is semicircular, such as As shown in figure (c); or, the cross section of the groove is U-shaped, as shown in figure (d).

Embodiment 2

[0085] This example provides several forms of the bipolar electrode sheet of the present invention.

[0086] figure 2 It is a schematic cross-sectional view of a bipolar electrode sheet according to the present invention. On both sides of the bipolar plate 1, a positive electrode material layer 201 and a negative electrode material layer 202 are respectively coated to form a bipolar electrode sheet, figure 2 (a) The two sides of the bipolar plate of the bipolar electrode sheet in the middle are respectively provided with electrolyte flow channels, figure 2 One side of the bipolar plate of the bipolar electrode sheet in (b) is provided with an electrolyte flow channel.

Embodiment 3

[0088] This embodiment provides several forms of the electrolyte channel of the present invention.

[0089] image 3 It is a schematic diagram of the electrolyte channel structure on the surface of the bipolar plate according to the present invention.

[0090] The electrolyte flow channel is a single flow channel, and a liquid port 301 is provided at the end of the single flow channel and communicated with the flow channel, and the electrolyte flows into the single flow channel through the liquid port 301 . When the electrolyte flow channel is a single flow channel, the electrolyte flow channel can be arranged in a straight line or in a curved line, such as image 3 (a) and image 3 (b) shown.

[0091] In order to ensure the wettability of the electrolyte in the electrode material layer, the electrolyte channel is preferably multi-channel. The arrangement of multiple channels can include a main channel 303 and a branch channel 304. The liquid port 301 is located at the end...

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Abstract

The invention provides a bipolar electrode sheet provided with an electrolyte flow channel and a bipolar battery including the bipolar electrode sheet, the bipolar electrode sheet comprises a bipolarplate and a positive electrode material layer and a negative electrode material layer respectively coated on both sides of the bipolar plate, one or more electrolyte flow channels are arranged on oneor both sides of the bipolar plate, and the electrolyte flow channels can effectively complete unified liquid injection of each battery unit in the bipolar battery, and are helpful for the electrolyteto flow in the battery, so as to facilitate the liquid injection, liquid exchange and liquid replenishment of the battery; The electrolyte flow channel can increase the contact surface between the electrolyte and the electrode material layer, so that the positive and negative electrode material layers can fully permeate and soak in the electrolyte.

Description

technical field [0001] The invention relates to a bipolar battery, in particular to a bipolar electrode sheet provided with an electrolyte flow channel and a bipolar battery containing the bipolar electrode sheet. Background technique [0002] A bipolar battery consists of two unipolar plates, several bipolar electrode sheets, a separator, and an electrolyte. A bipolar electrode sheet refers to an electrode with two polarities after coating a positive electrode material layer and a negative electrode material layer on both sides of the bipolar plate. Since each battery cell of a bipolar battery has an independent electrochemical structure, the number of battery cells can be increased by increasing the number of bipolar electrodes, thereby increasing the overall voltage of the battery, and the bipolar battery The resistance energy consumption between the battery cells is small, the electrode surface current and potential distribution are uniform, and the battery charging and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M2/36H01M10/04H01M10/42H01M50/60
CPCH01M4/02H01M10/0418H01M10/4242H01M2004/029H01M50/60Y02E60/10Y02P70/50
Inventor 张晓虎陈永翀张艳萍谢晨何颖源张萍
Owner BEIJING HAWAGA POWER STORAGE TECH
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