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A bipolar battery and a biplate assembly

A bipolar battery and bipolar plate technology, which is applied to battery pack components, batteries with bipolar electrodes, large-sized batteries/battery packs, etc., can solve problems such as pressure difference, achieve cost reduction, and be easy to manufacture , the effect of improving work performance

Inactive Publication Date: 2004-12-15
NILAR INT AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the problem of having a pressure difference between cells is solved, the disadvantages of said cells still exist
The external seal around the edge of each bipolar plate must still be fluid tight, which is very difficult to achieve

Method used

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  • A bipolar battery and a biplate assembly
  • A bipolar battery and a biplate assembly
  • A bipolar battery and a biplate assembly

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Embodiment Construction

[0026] The main advantages of the bipolar battery design are simplicity and low resistive losses. The battery has a relatively low part count consisting only of end plates and bipolar plates with appropriate components and sealing elements. By laminating a required number of bipolar plates, a battery pack with a desired voltage is constructed. Since the bipolar plates are electrically conductive and impermeable to electrolyte, the electrical connections between the cells are formed when the cells are stacked.

[0027] With terminals at each end, current flows perpendicular to the plates, which ensures uniform current and voltage distribution. Since the current path is very short, the voltage drop is significantly reduced.

[0028] Bipolar plates also have significantly reduced weight, volume, and manufacturing costs due to the elimination of components and manufacturing methods.

[0029] Bipolar Batteries The main problem that has not been solved commercially until now is h...

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Abstract

The present invention relates to a bipolar battery having at least two battery cells comprising: a negative end terminal, a positive end terminal and at least one biplate assembly arranged in a sandwich structure between the negative and positive end terminals. The battery also comprises a separator, with electrolyte, arranged between each negative and positive electrode forming a cell. An inner barrier of a hydrophobic material is arranged at least around one electrode on a first side of the biplate. An outer sealing, e.g. a frame, is provided around the edge of each biplate assembly and each end terminal and a hole is arranged through each biplate interconnecting each cell with adjacent cell(s) to create a common gas space for all cells in the battery. The invention also relates to a biplate assembly.

Description

technical field [0001] The invention relates to a bipolar battery comprising a pressure relief device as defined in the preamble of claim 1 . The invention also relates to a bipolar plate assembly as defined in the preamble of claim 8 . Background technique [0002] In theory, bipolar batteries can be used to increase battery energy storage capacity on a weight and volume basis, reduce packaging weight and volume, and provide stable battery performance and low internal resistance. [0003] A bipolar battery structure comprises an electrically conductive bipolar layer, the so-called bipolar plate, which serves as an electrical interconnection between adjacent cells in the battery as well as a partition between the cells. In order to successfully utilize a bipolar structure, the bipolar plates must be sufficiently conductive to carry current from one cell to the other, be chemically stable in the battery environment, be able to make and maintain good contact with the electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01MH01M10/04H01M10/18H01M10/28H01M10/44H01M10/48H01M50/186H01M50/193
CPCY02E60/12H01M10/044H01M10/34H01M2/0207H01M10/0418H01M2/08H01M2/021Y02E60/10Y02P70/50H01M50/193H01M50/186
Inventor 拉斯·弗雷德里克森尼尔·普斯特
Owner NILAR INT AB
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