Balanced pressure-bearing battery pack, preparation method thereof and structural integrated battery box

A battery pack and equalization technology, which is applied to battery pack parts, structural parts, circuits, etc., can solve the undisclosed multi-battery integrated anti-pressure structure and other problems, so as to increase the pressure-bearing and anti-seismic capabilities and avoid battery cycles The effect of reduced lifespan

Active Publication Date: 2022-06-24
JIAXING MODULE BONDING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tesla disclosed a battery system patent in June 2021, the patent name is IntegratedEnergyStorage System, the patent number is US 2021 / 0159567 A1, and the patent details the structure of the connection between the cylindrical battery pack and the box, and the structure of the box. Body and chassis structure integration technology, but it does not disclose how to build an integrated anti-pressure structure StructuralBattery with multiple batteries

Method used

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  • Balanced pressure-bearing battery pack, preparation method thereof and structural integrated battery box
  • Balanced pressure-bearing battery pack, preparation method thereof and structural integrated battery box
  • Balanced pressure-bearing battery pack, preparation method thereof and structural integrated battery box

Examples

Experimental program
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Embodiment 1

[0081] In the application of the power battery CTC group of the new energy vehicle or the energy storage system, the upper cover of the battery pack is used as the structure of the floor of the passenger compartment, and the Z-direction deformation will occur when the load is loaded. There is a tolerance in height. Therefore, when the top of the battery pack is deformed under pressure, the pressure of each single cell 100 will be unbalanced, resulting in different resistance values ​​between different single cells 100, which will affect the battery cycle life and overall performance. The service life of the car will lead to high-voltage leakage or battery leakage, which will trigger thermal runaway and cause fire and explosion, posing a great safety hazard.

[0082] Based on the above reasons, this embodiment provides a balanced pressure battery pack, the specific structure of which makes it suitable for the application of power battery CTC groups of new energy vehicles or ener...

Embodiment 2

[0109] This embodiment provides a balanced pressure-bearing battery pack, including a support structure unit, a ring beam structure unit, a top plate structure unit, and an external pressure reinforcement unit. The difference from Embodiment 1 is that in this embodiment, in the first A structural adhesive is further provided between the support bar 400 and the top cover 102 .

[0110] Those skilled in the art should understand that the height tolerance between the single cells 100 is not only derived from the height tolerance between the side shells 103 of the single cells 100, but also exists between the pole bodies 101 of different single cells 100, Therefore, in this embodiment, the tolerance between the single cells 100 is adjusted by the structural adhesive provided between the bottom plate 200 and the case bottom 104 and the structural adhesive provided between the first support bar 400 and the top cover 102 .

[0111] Preferably, the thickness of the structural adhesive...

Embodiment 3

[0113] This embodiment provides a balanced pressure-bearing battery pack, including a support structure unit, a ring beam structure unit, a top plate structure unit, and an external pressure reinforcement unit. The difference from Embodiment 1 is that in this embodiment, the single battery 100 is a single square battery.

[0114] refer to Figure 8 , the pole body 101 is arranged on both sides of the top cover 102 of the single prismatic battery, the pole column body 101 is a polar pole of the single battery 100 respectively, and its side shell 103 is a third pole column body 101.

[0115] In this embodiment, the top plate structural unit includes an insulating flat plate layer 300 and a pad structure. Preferably, the pad structure includes a first support bar 400 and a sheet-like bus bar 600, and the first support bar 400 and the sheet-like bus bar 600 are respectively are arranged on both sides of the top cover 102 . Preferably, in this embodiment, the sheet-shaped bus ba...

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Abstract

The invention relates to a balanced pressure-bearing battery pack, a preparation method thereof and a structural integrated battery box. The battery pack comprises a supporting structure unit and a top plate structure unit, the supporting structure unit comprises a bottom plate and a plurality of single batteries; the top plate structure unit comprises an insulating flat plate layer, a first supporting strip and a sheet-shaped busbar; the sheet busbar is parallel to the top cover of the single battery and is electrically connected with the pole body; the upper surfaces of all the flaky busbars are equal in height; the upper edge of the first supporting strip is as high as the upper surface of the sheet-shaped busbar; the insulating flat plate layer is erected on the upper surfaces of the first supporting strip and the sheet-shaped busbar; a fixed glue layer is arranged between the bottom plate and the shell bottom of the single battery; and the thickness of the fixed glue layer is greater than the height tolerance between the upper surface of the sheet-shaped busbar and the shell bottom. According to the invention, the height tolerance among different single batteries in the CTC battery pack is reduced to the greatest extent, so that the CTC battery pack can bear pressure in a balanced manner, the integrity and the structural strength of the battery pack are effectively improved, and the stable and normal work of the battery pack is ensured.

Description

technical field [0001] The invention relates to the field of new energy power batteries, in particular to a balanced pressure-bearing battery pack, a preparation method thereof, and a structurally integrated battery box. Background technique [0002] Tesla disclosed a patent for a battery system in June 2021, the patent name is Integrated Energy Storage System, and the patent number is US 2021 / 0159567 A1. The patent details the structure of the cylindrical battery pack connected to the box and the box The technology of integrating the body and the chassis structure of the car is not disclosed, but it has not disclosed how to construct an integrated anti-pressure structure StructuralBattery with multiple batteries. One of the main features of Tesla's CTC battery system integration solution is: the whole vehicle floor with the passenger compartment on it and the upper shell of the battery pack are combined into one, the body and the chassis are integrated, and the floor panel ...

Claims

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Application Information

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IPC IPC(8): H01M50/213H01M50/242H01M50/244H01M50/249H01M50/507
CPCH01M50/213H01M50/242H01M50/244H01M50/249H01M50/507Y02E60/10
Inventor 汪波浦辰娴霍琪琪
Owner JIAXING MODULE BONDING TECH CO LTD
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