CTB battery pack upper cover

Abstract

The utility model discloses an upper cover of a CTB battery pack, which relates to the technical field of new energy lithium batteries and comprises an upper layer plate, a lower layer plate, a support structure and pouring sealant, the upper layer plate, the lower layer plate and the support structure are all made of rigid materials, the support structure is fixedly connected between the upper layer plate and the lower layer plate, and the pouring sealant is arranged between the upper layer plate and the lower layer plate. And a gap of the supporting structure is filled with a pouring sealant. The utility model has the advantages that the integral rigidity of the structure is ensured through the upper-layer plate, the lower-layer plate and the supporting structure, the pouring sealant has a good buffering and energy-absorbing effect after being foamed and cured, and the deformation amplitude of the upper cover can be effectively reduced when the upper cover of the battery pack is impacted by falling of an external heavy object.

Description

Technical Field

[0001] This utility model relates to the field of new energy lithium battery technology, and in particular to a CTB battery pack cover. Background Technology

[0002] Traditional battery pack designs typically consist of multiple cells forming modules, which are then assembled into a battery pack. This design not only increases the weight and volume of the battery pack but also affects energy density and space utilization. To improve energy density and space utilization, CTB (Cell to Body) battery packs eliminate the battery pack's separators and module design, directly integrating the battery pack cover with the vehicle floor, thereby reducing thickness and increasing interior space. Compared to traditional battery packs, CTB battery pack covers require higher strength to support and protect occupant safety. Furthermore, dynamic scenarios involving heavy objects falling from seats or higher often cause greater deformation of the cover; existing battery pack covers only improve cover rigidity, offering little improvement in impact resistance. Utility Model Content

[0003] The technical problem to be solved by this invention is how to improve the buffering and energy absorption effect of the CTB battery pack cover.

[0004] This utility model solves the above-mentioned technical problems through the following technical means: a CTB battery pack cover, including an upper plate, a lower plate, a support structure and potting compound, wherein the upper plate, the lower plate and the support structure are all made of rigid materials, the support structure is fixedly connected between the upper plate and the lower plate, and the gap of the support structure is filled with potting compound.

[0005] The upper and lower plates and supporting structure ensure the overall rigidity of the structure, giving the top cover higher strength to support and protect the safety of the occupants; the potting compound, after foaming and curing, has a good buffering and energy absorption effect, which can effectively reduce the deformation of the top cover when it is subjected to the impact of falling heavy objects, reduce the amount of intrusion into the cells below the top cover, and reduce the risk of battery pack fire and explosion.

[0006] Preferably, the upper plate has a through-hole for applying glue.

[0007] Convenient for injecting and sealing adhesive.

[0008] Preferably, the upper plate has a through-hole for ventilation.

[0009] It facilitates ventilation.

[0010] Preferably, a sealing plate is fixedly connected between the upper plate and the lower plate to form multiple closed cavities, and the support structure and potting compound are both disposed in the closed cavities.

[0011] Ensure the entire package is sealed.

[0012] Preferably, the sealing plate is fixed to the upper plate and the lower plate by laser welding.

[0013] The connections are secure, ensuring the entire package is sealed.

[0014] Preferably, the support structure comprises a plurality of uniformly distributed cylindrical structures.

[0015] Ensure the overall structural rigidity and the filling effect of the potting compound.

[0016] Preferably, the diameter of the cylindrical structure is 0.5 to 1 mm.

[0017] Ensure the overall structural rigidity and the filling effect of the potting compound.

[0018] Preferably, the height of the cylindrical structure is 0.5 to 2 mm.

[0019] Ensure the overall structural rigidity and the filling effect of the potting compound.

[0020] Preferably, both the upper plate and the lower plate are made of roll-formed steel.

[0021] The process is easy to form, ensuring the overall rigidity of the structure.

[0022] Preferably, the supporting structure is made of steel.

[0023] Ensure the overall rigidity of the structure. Attached Figure Description

[0024] Figure 1 This is an isometric view of the top cover of the CTB battery pack according to an embodiment of the present invention.

[0025] Figure 2 This is a top view of the CTB battery pack cover according to an embodiment of the present invention.

[0026] Figure 3 This is a front view schematic diagram of the top cover of the CTB battery pack according to an embodiment of the present utility model. Detailed Implementation

[0027] 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.

[0028] like Figures 1 to 3As shown in the figure, this utility model embodiment discloses a CTB battery pack cover, including an upper plate 1, a lower plate 2, a potting hole 3, a vent hole 4, a support structure 5, a potting compound 6, and a sealing plate 7.

[0029] The upper plate 1, lower plate 2, and support structure 5 are all made of rigid materials. The support structure 5 is fixedly connected between the upper plate 1 and the lower plate 2, and the gaps in the support structure 5 are filled with potting compound 6. The upper plate 1, lower plate 2, and support structure 5 ensure the overall rigidity of the structure, giving the top cover higher strength to support and protect the safety of the occupants. After the potting compound 6 foams and cures, it has a good buffering and energy absorption effect. When the battery pack top cover is subjected to the impact of falling heavy objects, it can effectively reduce the deformation of the top cover, reduce the intrusion of the cells under the top cover, and reduce the risk of battery pack fire and explosion.

[0030] The upper plate 1 has a through hole 3 for filling glue and a vent hole 4 for easy filling of potting glue 6 and venting.

[0031] The upper plate 1 is parallel to the lower plate 2. A sealing plate 7 perpendicular to the upper plate 1 is fixedly connected between the upper plate 1 and the lower plate 2, forming multiple closed cavities. The support structure 5 and the potting compound 6 are both set in the closed cavities to ensure the entire package is sealed.

[0032] The sealing plate 7 is fixed to the upper plate 1 and the lower plate 2 by laser welding, ensuring a firm connection and guaranteeing the sealing of the entire package.

[0033] The support structure 5 includes multiple uniformly distributed cylindrical structures, the diameter of which is 0.5 to 1 mm and the height of which is 0.5 to 2 mm, to ensure the overall rigidity of the structure and the filling effect of the potting compound.

[0034] Both the upper plate 1 and the lower plate 2 are made of roll-formed steel, which is easy to form and ensures the overall rigidity of the structure.

[0035] Support structure 5 is made of steel to ensure the overall rigidity of the structure.

[0036] 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 CTB battery pack cover, characterized in that: It includes an upper plate, a lower plate, a support structure, and potting compound. The upper plate, lower plate, and support structure are all made of rigid materials. The support structure is fixedly connected between the upper plate and the lower plate, and the gap of the support structure is filled with potting compound.

2. The CTB battery pack cover as described in claim 1, characterized in that: The upper plate has a through-hole for applying glue.

3. The CTB battery pack cover as described in claim 1, characterized in that: The upper plate has a through-hole for ventilation.

4. The CTB battery pack cover as described in claim 1, characterized in that: A sealing plate is fixedly connected between the upper plate and the lower plate, forming multiple closed cavities. The support structure and potting compound are both disposed in the closed cavities.

5. The CTB battery pack cover as described in claim 4, characterized in that: The sealing plate is fixed to the upper plate and the lower plate by laser welding.

6. The CTB battery pack cover as described in claim 1, characterized in that: The support structure comprises multiple evenly distributed cylindrical structures.

7. The CTB battery pack cover as described in claim 6, characterized in that: The diameter of the cylindrical structure is 0.5 to 1 mm.

8. The CTB battery pack cover as described in claim 6, characterized in that: The height of the cylindrical structure is 0.5 to 2 mm.

9. The CTB battery pack cover as described in claim 1, characterized in that: Both the upper and lower plates are made of roll-formed steel.

10. The CTB battery pack cover as described in claim 1, characterized in that: The supporting structure is made of steel.

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