Processing process of pole column body of power battery and pole column body of power battery
A technology of power battery and processing technology, which is applied to small-sized batteries/battery packs, batteries, battery pack components, etc., and can solve problems such as gaps between riveting parts, increased connection internal resistance, and different thermal expansion coefficients.
Inactive Publication Date: 2014-10-08
江苏国泰之光新能源科技有限公司
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Problems solved by technology
[0002] At present, the riveting process used in the pole body of the vehicle power battery, especially the lithium-ion battery, can only ensure that the connection between two different parts is through a physical connection, not as a whole. The inconsistency of the coefficient of thermal expansion between them leads to a gap in the riveting part, and at the same time, it may cause an oxide film on the riveting part due to heat or other reasons, resulting in an increase in the internal resistance of the connection.
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[0022] In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.
[0023] Such as figure 1 As shown, the power battery pole body processing technology of this embodiment includes the following steps:
[0024] Step S101, forming the profile of the pole body.
[0025] By designing the mold, the material is made as figure 2 For the shape of the pole column profile 201, the entire profile should be annealed during the production process to eliminate the internal stress of the material. In this embodiment, the brass with the grade H62 is selected. Of course, the material is not limited thereto, and stainless steel, pure iron or aluminum can also be used.
[0026] In step S102 , the pole body profile is cut to obtain a pole body blank 202 .
[0027] Cut the whole pole body profile into pole body blanks 202 of the s...
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Abstract
The invention discloses a processing process of a pole column body of a power battery and the pole column body of the power battery. The processing process comprises the following steps: (1) forming a section of the pole column body; (2) slitting the section of the pole column body to obtain an initial blank; (3) cutting and processing the initial blank of the pole column body to form a sealing disc, an initial blank of a bus bar and an initial blank of a pole column on the initial blank of the pole column body; (4) tapping the initial blank of the pole column to obtain the pole column; (5) grooving the initial blank of the bus bar to form a plurality of current-converging pieces, wherein a partitioning groove is arranged between adjacent current-converging pieces so as to obtain a semi-finished product of the pole column body; (8) carrying out nickle-plating treatment on the semi-finished product of the pole column body to obtain the pole column body of the power battery. The processing process and the pole column body disclosed by the invention have the advantages that the damage to electromagnetic lugs in the assembling process of the pole column body can be effectively avoided, and simultaneously, the internal resistance of connection for the whole pole column body can be furthest reduced.
Description
technical field [0001] The invention relates to a processing technology for a pole body of a power battery and the pole body of the power battery. The pole body is suitable for lithium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, nickel-carbon batteries and other secondary batteries. Background technique [0002] At present, the riveting process used in the vehicle power battery pole body, especially the lithium-ion battery, can only ensure that the connection between two different parts is through physical connection, not as a whole. The inconsistency of the coefficient of thermal expansion between them leads to a gap in the riveting part, and at the same time, it may cause an oxide film on the riveting part due to heat or other reasons, resulting in an increase in the internal resistance of the connection. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and p...
Claims
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IPC IPC(8): H01M2/30H01M50/296H01M50/543H01M50/552H01M50/564
CPCH01M2220/20H01M50/543Y02E60/10
Inventor 周志雄王更生张宝库马阳杨岳军周国泰
Owner 江苏国泰之光新能源科技有限公司