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Battery pack for electric vehicle and its making method

A technology for battery packs and electric vehicles, applied in secondary battery manufacturing, secondary batteries, circuits, etc., can solve the problem of increasing the rework rate or scrap rate of parts, increasing processing procedures and processing costs, and long processing time for a single part, etc. problems, to achieve the effect of shortening the production cycle, eliminating the processing steps, and having a simple structure

Inactive Publication Date: 2009-04-15
中山中炬森莱高技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned electric vehicle battery pack has the following disadvantages: 1. The outer edge size of the welding cup of the battery pack in the prior art is basically equal to the outer edge size of the unit cell, resulting in a large volume of the welding cup and increasing the cost of raw materials. Cost; 2. The nut welded with the welding cup adopts a non-standard nut, which is large in size, and the cost of raw materials required for processing will also increase exponentially; 3. Due to the large size of the non-standard nut used, it increases virtually 4. The nut is a non-standard nut, which needs to be processed according to its size during the production process, adding additional processing procedures and processing costs, which is time-consuming and laborious; 5. The solder cup of the battery pack has multiple bends. The ladder-shaped structure of the part is more complicated, which brings certain difficulties to the processing, resulting in longer processing time for a single component and increased manufacturing costs, and due to the complexity of the welding cup processing process, defective or scrap products are prone to appear in the finished product , increase the rework rate or scrap rate of parts; 6. Since the solder cup has multiple bending parts, and the cup body is a three-dimensional structure with variable cross-section, the overall strength of the solder cup is weakened, and the solder cup is prone to accidents during processing and use. Deformation; 7. Due to the complexity in the processing of welding cups and nuts in the prior art, the production cycle of the unit battery pack is too long, and its production efficiency is low

Method used

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  • Battery pack for electric vehicle and its making method
  • Battery pack for electric vehicle and its making method
  • Battery pack for electric vehicle and its making method

Examples

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Effect test

Embodiment 1

[0042] Figure 4 to Figure 9 A battery pack for an electric vehicle is shown, which is composed of several unit cells 1 connected in series, each unit cell 1 is welded with a welding cup 3 at the positive end and at the negative end, and a nut 4 is welded inside the welding cup 3, wherein , the nut 4 adopts the standard nickel-plated nut of M8, and the welding cup 3 is made of a nickel-plated steel plate with a thickness of 0.2-0.4 mm. The cup body 32 and the cup holder 31, the cup body 32 is located in the middle of the welding cup, the cup edge 33 is located at the top of the welding cup, the cup holder 31 is located at the bottom of the welding cup, and the cup body 32, the cup edge 33 and the cup holder 31 are all used Round transitions.

[0043] The cup holder 31 of the welding cup 3 is a disc-shaped structure extending outward along the outer flange of the cup body 32. The plane where the cup holder 31 is located is perpendicular to the cup body 32. A strip-shaped split ...

Embodiment 2

[0052] Such as Figures 10 to 12 As shown, the difference from the first embodiment is that the welding cup 3 in this embodiment is not provided with a cup edge, and the welding cup 3 is an open structure, which is composed of a cup seat 31 and a cup body 32. At this time, when the standard nut 4 It is welded in the cup body 32 of the welding cup 3 to ensure that the end face of the nut 4 is flush with the end face of the cup body 32 . After the welding is completed, the whole unit battery pack is formed by connecting the nut 4 with the standard bolt 5, the gasket 6 and the conductive connecting piece 2.

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Abstract

The invention relates to a battery which is used for electric car, and is composed by certain units battery series, each unit battery positive pole and the negative pole welded with weld cup, the weld cup is a cup shape body which opened a mouth in the two terminals, the cup shape body includes the cup body and cup seating, the cup seating of the weld cup and the unit cell end welding, the nut welds in the cup body of the weld cup, the nut is the standard nut, the cup body is the conatant section solid structure, the size matches with the size of the standard nut. The battery structure is simple, is advantageous for processing, obviously enhance the unit battery production efficiency. At the same time the invention also discloses the manufacture method which is used for the electric car.

Description

technical field [0001] The invention relates to a battery pack for an electric vehicle and a manufacturing method thereof. Background technique [0002] A hybrid electric vehicle usually uses a battery pack as its power supply device, and the battery pack is composed of several unit cells connected in series. Figure 1 to image 3 Shown is a structural diagram of a battery pack for electric vehicles in the prior art. The positive and negative poles of several unit cells 101 are alternately connected in turn through conductive connecting pieces 102 to form the entire battery pack. The positive end of the welding cup 106 is spot-welded with a welding cup 106. The welding cup 106 is a stepped structure with a variable cross-section with circular openings at both ends. One end is a large opening end and the other end is a small opening end. The small opening end of the welding cup 106 It is connected with the positive terminal of the unit battery by spot welding, and a non-stand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/00H01M10/04
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 段秋生肖建武
Owner 中山中炬森莱高技术有限公司