Battery pack equalization pressurization equipment, battery pack preparation method and battery module

A technology for pressurized equipment and battery packs, applied in battery pack components, secondary battery manufacturing, secondary batteries, etc., can solve problems such as low production efficiency, cumbersome steps, and differences in contact resistance, so as to improve production efficiency and improve production efficiency. Consistency of contact resistance, effects of high electrical connection stability

Active Publication Date: 2022-05-13
JIAXING MODULE BONDING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the tolerance in the diameter of different single cylindrical batteries, there is also a cumulative tolerance in the length of the battery row
If multiple battery rows arranged in parallel adopt the overall pressure method at the end of the same plane, it is impossible to ensure that the pressure on each battery row is the same, so that the contact resistance between the rows and then affecting the internal electrical connection points between the rows will be relatively large. difference, which is not conducive to fine equalization grouped
Furthermore, in the current process of battery CTP grouping, it is necessary to pressurize the battery row or module outside the battery box, seal it, and then put it into the battery box. The steps are cumbersome and the production efficiency is low.

Method used

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  • Battery pack equalization pressurization equipment, battery pack preparation method and battery module
  • Battery pack equalization pressurization equipment, battery pack preparation method and battery module
  • Battery pack equalization pressurization equipment, battery pack preparation method and battery module

Examples

Experimental program
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Effect test

Embodiment 1

[0053] This example 1 provides a battery pack equalizing pressurization equipment, which is used to prepare the single cylindrical battery 30 into a CTP module that is connected in series within the row and connected in parallel between the rows, and is especially suitable for the preparation process of the power battery unit of a new energy vehicle. And it is also applicable to low-speed electric vehicles, electric bicycles and other energy storage products.

[0054] In this embodiment, the single cylindrical battery 30 is a power battery with high energy density, which can be selected from 18650 batteries, 21700 batteries, 46800 batteries, etc., but is not limited thereto.

[0055] like Figure 1-Figure 4 As shown, the battery pack equalizing pressurization device in this embodiment does not include the single cylindrical batteries 30 shown in the figure, but is provided solely as a structure for grouping the single cylindrical batteries 30 .

[0056] This embodiment provid...

Embodiment 2

[0069] refer to Figure 1-Figure 4 , this embodiment provides a method for manufacturing a battery pack using the battery pack equalization pressurization device described in Embodiment 1, including:

[0070] 1. Put a number of single cylindrical batteries 30 into the frame part 10 of the pressurizing device in sequence to form a rectangular battery array;

[0071] Provide several upright single cylindrical batteries 30, set structural glue 60 on the bottom plate of the frame part 10, start from a corner of the frame part 10, put the single cylindrical batteries 30 in sequence next to the baffle, and arrange them as batteries array;

[0072] 2. Structural glue 60, and / or connecting bridge 40, and / or cold welding glue, and / or insulating connectors are arranged between the side shell poles of adjacent single cylindrical batteries in the battery array;

[0073] The series connection between the top pole 31 of the adjacent single cylindrical battery 30 and the shell pole is real...

Embodiment 3

[0092] This embodiment provides a battery pack manufactured by using the equipment described in Embodiment 1 or a battery module manufactured by using the method described in Embodiment 2.

[0093] As described in Embodiment 2 above, the battery module includes a combination of a frame part 10 and a battery array (and its internal electrical connectors and insulators); preferably, the battery module includes a combination of several frame parts 10 and a battery array .

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Abstract

The invention relates to battery pack equalization pressurization equipment, a battery pack preparation method and a battery module, and the pressurization equipment comprises a frame part and a pressurization part; the frame part comprises a surrounding baffle plate, and a battery array can be accommodated in the frame part; the pressurizing part is arranged between the baffle and one side edge of the battery array, the surface of the side, facing the battery array, of the pressurizing part is a pressurizing surface, the pressurizing surface comprises N matching surfaces, and each matching surface is used for applying pressure to the corresponding longitudinal battery column; the pressurizing part can expand along with injection of fluid, so that the N matching surfaces of the pressurizing part apply pressure to the battery array, and the pressures applied to the corresponding longitudinal battery columns by the N matching surfaces are the same. According to the invention, higher electric connection stability and better contact resistance consistency can be brought to the single batteries in the battery pack. By utilizing the pressurizing equipment, the single cylindrical batteries can be efficiently electrically connected and mounted in the frame part, so that the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of new energy power batteries, in particular to a battery pack equalization pressurization device, a battery pack preparation method and a battery module. Background technique [0002] The group application field of pure electric vehicle on-board power battery packs is developing towards the CTP (CELL TO PACK) technology with high energy density and rapid overall grouping (packaging). The single size of the industry standard cylindrical power battery is expanding from 21700 (diameter 21mm, height 70mm) to 46800 (diameter 46mm, height 80mm). Improving the convenience and reliability of various electrical connection operations in the process of grouping from single cylindrical batteries to battery packs is a key issue that CTP technology must solve. In the process of arranging and grouping the single cylindrical battery CTP, considering that the side case of the single cylindrical battery is one of the two poles of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/264H01M50/213H01M50/244H01M50/249H01M10/04
CPCH01M50/264H01M50/213H01M50/244H01M50/249H01M10/0481Y02P70/50Y02E60/10
Inventor 汪波汪子琪
Owner JIAXING MODULE BONDING TECH CO LTD
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