A CTP battery pack mounting structure

Abstract

This utility model discloses a CTP battery pack mounting structure, relating to the field of power battery technology, including crossbeams, end plates, and cell modules. The cell modules are disposed between two crossbeams, and end plates are installed at both ends of the cell modules. Each end plate includes a vertical plate surface and an overlapping surface. The vertical plate surface is riveted to the inner side of the crossbeam, and the overlapping surface is riveted to the upper end of the crossbeam. The advantages of this utility model are: it allows for a stable, reliable, and convenient connection between the cell modules and the crossbeams, and improves the overall system rigidity of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a CTP battery pack mounting structure. Background Technology

[0002] CTP (Cell to Pack) assembly technology offers advantages such as high energy density and low cost compared to traditional CTM (Cell to Module) and then to pack assembly technology. Patent document CN118539037A discloses a CTP battery pack assembly including cell modules and T-beams, with the cell modules connected to the T-beams via structural adhesive. In existing CTP battery packs, cell modules are first placed on a liquid-cooled plate at the bottom of the crossbeam and then bonded to the crossbeam. The liquid-cooled plate becomes the main load-bearing component. The connection between the liquid-cooled plate and the casing frame and crossbeams typically uses FDS (Flow Drill Screw) technology, which results in high stress near the screw holes on the liquid-cooled plate, posing a risk of failure.

[0003] To enhance the connection between the cell modules and the crossbeam, reduce the stress on the liquid cooling plate, and improve the overall system rigidity of the battery pack, current methods typically include increasing the preload of the cell modules, applying adhesive overflow to the bottom of the end plates, and potting adhesive into the end plates. However, increasing the preload of the cell modules is problematic because the thickness differences between different cells make it difficult to guarantee the consistency of the resulting preload, introducing unreliability. Applying adhesive overflow to the bottom of the end plates is also problematic because the fluidity of the thermally conductive adhesive varies over time, making the overflow height unpredictable and impossible to observe. Potting adhesive into the end plates also presents fluidity issues, and there is a risk of adhesive dripping during the potting process, potentially contaminating the inside of the battery pack. All of these methods have certain drawbacks and cannot provide a stable, reliable, and convenient connection between the cell modules and the crossbeam. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to stably, reliably and conveniently connect the cell modules to the crossbeam in a CTP battery pack, and improve the system rigidity of the entire battery pack.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: a CTP battery pack installation structure, including a crossbeam, an end plate, and a cell module; the cell module is disposed between two crossbeams, and an end plate is installed at both ends of the cell module; the end plate includes a vertical plate surface and an overlapping surface, the vertical plate surface is riveted to the inner side of the crossbeam, and the overlapping surface is riveted to the upper end of the crossbeam.

[0006] During installation, the assembled end plate and cell module are first placed between the two crossbeams. Since the overlapping surface is on the upper end of the crossbeam, the stress on the liquid cooling plate at the bottom of the crossbeam is reduced. Then, the end plate is riveted to the crossbeam to fix it, thereby achieving a stable, reliable and convenient connection between the cell module and the crossbeam, and improving the system rigidity of the entire battery pack.

[0007] Preferably, the end plate includes a first mounting plate, the first mounting plate having the vertical plate surface and the overlapping surface, and the first mounting plate is made of metal.

[0008] The metal mounting plate ensures the reliability of the riveting.

[0009] Preferably, the end plate further includes a second mounting plate, which is disposed inside the first mounting plate and is made of plastic.

[0010] The second mounting plate, made of plastic, serves as insulation and heat insulation.

[0011] Preferably, the second mounting plate has a plurality of countersunk holes on the side facing the first mounting plate.

[0012] Countersunk holes can reduce the contact area between the second mounting plate and the first mounting plate, thereby reducing the heat loss of the battery module through the first mounting plate and achieving the effect of heat preservation.

[0013] Preferably, an insulating heat-insulating sheet is provided between the first mounting plate and the second mounting plate.

[0014] It provides insulation and heat insulation, reducing heat loss from the battery cell module.

[0015] Preferably, the battery cell module includes multiple battery cells arranged in a row, with insulating and heat-insulating sheets disposed between adjacent battery cells.

[0016] It provides insulation and heat insulation, reducing heat loss from the battery cell module.

[0017] Preferably, an insulating heat-insulating sheet is provided between the battery cell module and the end plate.

[0018] It provides insulation and heat insulation, reducing heat loss from the battery cell module.

[0019] Preferably, both sides of the insulating heat insulation sheet are covered with double-sided adhesive.

[0020] It serves to connect the first mounting plate and the second mounting plate, facilitating installation.

[0021] Preferably, the insulating heat insulation sheet is made of plastic.

[0022] Lightweight and with good heat insulation.

[0023] Preferably, the overlapping surface has a groove with an opening facing outwards.

[0024] It facilitates the clamping of hoisting fixtures, enabling the battery cell modules to be hoisted into the box. Attached Figure Description

[0025] Figure 1 This is an isometric view of the CTP battery pack mounting structure according to an embodiment of the present invention.

[0026] Figure 2 This is an exploded view of the CTP battery pack installation structure according to an embodiment of the present invention.

[0027] Figure 3 This is an exploded view of the end plate of an embodiment of this utility model. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figures 1 to 3 As shown in the figure, this utility model embodiment discloses a CTP battery pack installation structure, including a crossbeam 1, an end plate 2, an insulating heat insulation sheet 3, and a cell module 4.

[0030] The crossbeam 1 is an important load-bearing component of the battery pack housing, and the cell module 4 is set between two crossbeams 1. End plates 2 are installed at both ends of the cell module 4. Each end plate 2 includes a vertical plate surface and an overlapping surface. The vertical plate surface is riveted to the inner side of the crossbeam 1, and the overlapping surface is riveted to the upper end of the crossbeam 1. The overlapping surface has a groove with an outward opening, facilitating clamping by lifting fixtures and enabling the cell module 4 to be lifted into the housing. The cell module 4 includes multiple cells arranged in a row. Insulating heat-insulating sheets 3 are installed between adjacent cells and between the cell module 4 and the end plates 2, providing insulation and reducing heat loss from the cell module 4. Both sides of the insulating heat-insulating sheets 3 have double-sided adhesive, allowing adjacent cells and the cell module 4 and end plates 2 to be bonded together for easy installation. The insulating heat-insulating sheets 3 are made of plastic, are lightweight, and have good heat insulation properties.

[0031] The end plate 2 includes a first mounting plate 201 and a second mounting plate 202. The second mounting plate 202 is disposed inside the first mounting plate 201. The first mounting plate 201 has the vertical plate surface and the overlapping surface. The first mounting plate 201 is made of metal, which can ensure the reliability of riveting. The second mounting plate 202 is made of plastic, which serves as insulation and heat insulation. An insulating heat insulation sheet 3 is disposed between the first mounting plate 201 and the second mounting plate 202, which further serves as insulation and heat insulation. The first mounting plate 201 and the second mounting plate 202 can be bonded together by the insulating heat insulation sheet 3, which facilitates installation.

[0032] The second mounting plate 202 has several rectangular countersunk holes uniformly machined on the side facing the first mounting plate 201. This reduces the contact area between the second mounting plate 202 and the first mounting plate 201 through the insulating heat insulation sheet 3, thereby reducing the heat loss of the battery cell module 4 through the first mounting plate 201 and achieving the effect of heat preservation.

[0033] Working principle: During installation, the assembled end plate 2, insulating heat insulation sheet 3 and cell module 4 are first hoisted into the space between two crossbeams 1 using hoisting tools. Since the overlapping surface is on the upper end of the crossbeam 1, the stress on the liquid cooling plate at the bottom of the crossbeam 1 is reduced. Then, the end plate 2 is riveted and fixed to the crossbeam 1, thereby achieving a stable, reliable and convenient connection between the cell module 4 and the crossbeam 1, which improves the system rigidity of the entire battery pack.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A CTP battery pack mounting structure, characterized in that: It includes a crossbeam, end plates, and a battery cell module; the battery cell module is disposed between two crossbeams, and end plates are installed at both ends of the battery cell module; the end plate includes a vertical plate surface and an overlapping surface, the vertical plate surface is riveted to the inner side of the crossbeam, and the overlapping surface is riveted to the upper end of the crossbeam.

2. The CTP battery pack mounting structure according to claim 1, characterized in that: The end plate includes a first mounting plate, which has the vertical plate surface and the overlapping surface, and the first mounting plate is made of metal.

3. The CTP battery pack mounting structure according to claim 2, characterized in that: The end plate also includes a second mounting plate, which is disposed inside the first mounting plate and is made of plastic.

4. The CTP battery pack mounting structure according to claim 3, characterized in that: The second mounting plate has a plurality of countersunk holes on the side facing the first mounting plate.

5. The CTP battery pack mounting structure according to claim 3, characterized in that: An insulating heat insulation sheet is provided between the first mounting plate and the second mounting plate.

6. The CTP battery pack mounting structure according to claim 1, characterized in that: The battery cell module includes multiple battery cells arranged in a row, with insulating and heat-insulating sheets between adjacent battery cells.

7. The CTP battery pack mounting structure according to claim 1, characterized in that: An insulating heat-insulating sheet is provided between the battery cell module and the end plate.

8. The CTP battery pack mounting structure according to any one of claims 5-7, characterized in that: Both sides of the insulating heat insulation sheet have double-sided adhesive.

9. The CTP battery pack mounting structure according to any one of claims 5-7, characterized in that: The insulating and heat-insulating sheet is made of plastic.

10. The CTP battery pack mounting structure according to claim 1, characterized in that: The overlapping surface has a groove with an opening facing outwards.

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