Battery pack and vehicle

Abstract

The utility model relates to a battery pack and a vehicle. The battery pack comprises a battery box body, a battery module and colloid, the battery box body comprises a frame, and a first connecting part is formed on the inner side wall of the frame; the battery module is arranged in the battery box body; the colloid comprises a colloid body used for packaging the battery module and a second connecting part, and the first connecting part is matched with the second connecting part and used for limiting the battery module in the height direction. According to the battery pack, the first connecting part on the inner side wall of the frame of the battery box body is matched and connected with the second connecting part of the colloid, so that limiting fit is formed in the height direction, and the overall rigidity and strength of the battery pack are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and in particular, to a battery pack and a vehicle. Background Art

[0002] With the continuous development of new energy vehicles, the design requirements for battery safety performance are getting higher and higher. Battery modules are usually placed in the accommodation space of a battery box and are independent of each other. Therefore, the battery modules are mainly supported by the bottom plate at the bottom of the battery box. Since the battery pack is large in size and the connection and fixing space between the bottom plate and the frame of the battery box is limited. Therefore, the overall stiffness of the battery pack is poor and it is easily damaged due to insufficient limiting. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a battery pack and a vehicle. The battery pack is connected and cooperated with the second connection part of the colloid through the first connection part on the inner side wall of the frame of the battery box to form a limiting fit in the height direction, so as to improve the overall stiffness and strength of the battery pack.

[0004] To achieve the above object, according to the first aspect of the present disclosure, there is provided a battery pack, including:

[0005] A battery box, including a frame, and a first connection part is formed on the inner side wall of the frame;

[0006] A battery module, disposed inside the battery box; and

[0007] A colloid, including a colloid body for encapsulating the battery module, and a second connection part, the first connection part cooperates with the second connection part to limit the battery module in the height direction.

[0008] Optionally, the first connection part is configured as a groove;

[0009] The second connection part is configured as a first protrusion that cooperates with the groove; and / or

[0010] The first connection part is configured as at least one second protrusion arranged at intervals in the height direction on the inner side wall of the frame;

[0011] The second connection part is configured as a first depression that is inwardly recessed on the side wall of the colloid body, and the second protrusion is connected in cooperation with the first depression.

[0012] Optionally, the groove extends along the extending direction of the frame; the first protrusion extends along the side wall of the colloid body.

[0013] Optionally, there are a plurality of the grooves, and they are arranged at intervals in the height direction.

[0014] Optionally, the included angle α between the opposite two side walls of the groove body is: 0 < α < 180°.

[0015] Optionally, the included angle α between the opposite two side walls of the groove body is: 30° < α < 120°.

[0016] Optionally, the depth of the groove body is 2 - 10 mm.

[0017] Optionally, the second protrusion extends along the extending direction of the frame;

[0018] The first recess extends along the side wall of the glue body.

[0019] Optionally, the battery box body further includes a bottom plate connected to the bottom of the frame, and the battery pack further includes an upper cover plate connected to the top of the frame;

[0020] The glue body is connected to the bottom plate and / or the upper cover plate.

[0021] Optionally, the colloid is a foaming potting adhesive.

[0022] According to a second aspect of the present disclosure, there is also provided a vehicle, which includes the above-mentioned battery pack.

[0023] Through the above technical solution, that is, the battery pack of the present disclosure includes a battery box body and a battery module disposed inside the battery box body. The battery box body includes a frame, and a first connection portion is formed on the inner side wall of the frame. It further includes a colloid having a glue body and a second connection portion. Among them, the glue body is used to encapsulate the battery module, and the second connection portion can cooperate and connect with the first connection portion to form a limit on the battery module in the height direction, avoiding damage to the components (such as the bottom plate and the liquid cooling plate) at the bottom of the battery box body caused by the gravity or shaking of the battery module, and improving the overall stiffness and strength of the battery pack.

[0024] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. They are used together with the following specific implementation to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0026] Figure 1 is a structural diagram of a battery pack provided by some embodiments of the present disclosure.

[0027] Figure 2 is an exploded view of a battery pack provided by some embodiments of the present disclosure.

[0028] Figure 3It is a top view of a battery pack provided by some embodiments of the present disclosure.

[0029] Figure 4 It is based on Figure 3 the A-A cross-sectional view in

[0030] Figure 5 It is based on Figure 4 the enlarged view of part B in

[0031] Figure 6 It is based on Figure 5 the enlarged view of part C in

[0032] Figure 7 It is based on Figure 3 the D-D cross-sectional view in

[0033] Figure 8 It is based on Figure 7 the enlarged view of part E in

[0034] Figure 9 It is a schematic structural diagram of a battery box provided by some embodiments of the present disclosure, with the upper cover plate not shown.

[0035] Figure 10 It is a schematic structural diagram of a battery module placed in a battery box provided by some embodiments of the present disclosure.

[0036] Figure 11 It is a schematic structural diagram of a battery module and a battery box encapsulated with foaming potting glue, with the upper cover plate not shown.

[0037] Explanation of reference numerals

[0038] 100 - Battery box; 110 - Frame; 111 - First connecting part; 1111 - Groove; 1112 - Second protrusion; 120 - Upper cover plate; 130 - Bottom plate;

[0039] 200 - Battery module;

[0040] 300 - Colloid; 310 - Colloid body; 320 - Second connecting part; 321 - First protrusion; 322 - First depression;

[0041] 400 - Structural glue. Detailed description of specific embodiments

[0042] The following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present disclosure, and are not used to limit the present disclosure.

[0043] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower, left, and right" generally refer to the upper, lower, left, and right in the relative drawings; "inner and outer" refer to the inside and outside of the contour of the corresponding component; "top and bottom" refer to the top and bottom in the actual use state of the battery pack; "far and near" refer to the corresponding structure or component being far from or close to another structure or component. In the drawings of the present disclosure, X represents the first direction; Y represents the second direction; Z represents the third direction, i.e., the height direction. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance. Furthermore, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as a limitation to the present disclosure.

[0044] To achieve the above object, according to the first aspect of the present disclosure, as Figures 1 to 11 shown, an embodiment of the present disclosure provides a battery pack, which includes a battery box body 100, a battery module 200, and a colloid 300. The battery box body 100 includes a frame 110, and a first connection portion 111 is formed on the inner side wall of the frame 110; the battery module 200 is disposed inside the battery box body 100; the colloid 300 includes a colloid body 310 for encapsulating the battery module 200, and a second connection portion 320 connected to the side of the colloid body 310. The first connection portion 111 cooperates with the second connection portion 320 to limit the battery module 200 in the height direction and improve the overall stiffness of the battery pack.

[0045] Through the above technical solution, that is, the battery pack of the present disclosure includes a battery box body 100 and a battery module 200 disposed inside the battery box body 100 (for example, the battery module may include a battery cell group, a liquid cooling plate, an internal circuit board, etc.). The battery box body 100 includes a frame 110, and a first connection portion 111 is formed on the inner side wall of the frame 110. It further includes a colloid 300 having a colloid body 310 and a second connection portion 320. Among them, the colloid body 310 is used to encapsulate the battery module 200, and the second connection portion 320 can cooperate with the first connection portion 111 to form a limit on the battery module 200 in the height direction, avoiding damage to the components (such as the bottom plate 130 and the liquid cooling plate) at the bottom of the battery box body 100 caused by the gravity or shaking of the battery module 200, and improving the overall stiffness and strength of the battery pack.

[0046] The first connection portion 111 and the second connection portion 320 can be constructed in any suitable manner, such as Figures 3 to 6As shown, in some embodiments, the first connecting portion 111 may be configured as a groove 1111; the second connecting portion 320 is configured as a first protrusion 321 that cooperates with the groove 1111. Among them, the groove 1111 may be formed on the inner sidewall of the frame 110, and the first protrusion 321 corresponding to the groove 1111 and capable of cooperating and connecting is formed on the outer sidewall of the rubber body 310 of the colloid 300, so that the first protrusion 321 can be installed inside the groove 1111, thereby fixing the edge of the rubber body 310 and the battery module 200 encapsulated inside the rubber body 310, that is, forming a connection limit between the rubber body 310 and the inner sidewall of the frame 110, and avoiding causing too much pressure on the bottom plate 130 and affecting the overall stiffness of the battery pack.

[0047] In some embodiments, the groove 1111 extends along the extending direction of the frame 110; the first protrusion 321 extends along the sidewall of the rubber body 310. Among them, taking a rectangular battery pack as an example, the groove 1111 may be provided on two opposite inner sidewalls of the frame 110 and arranged along the extending direction of the frame 110. At the same time, the first protrusion 321 may also be provided on two opposite outer sidewalls of the rubber body 310 and arranged along the extending direction of the outer sidewall, so as to realize the connection between two opposite sides of the rubber body 310 and two opposite sides of the frame 110, that is, a limiting effect can be achieved. Of course, the groove 1111 extending circumferentially may also be formed on all inner sidewalls of the frame 110, and the first protrusion 321 extending circumferentially is also provided on the circumferential outer sidewall of the rubber body 310, which can better realize the connection between the rubber body 310 and the frame 110 in the circumferential direction, and the limiting effect is better.

[0048] In order to better realize the hanging connection between the rubber body 310 encapsulating the battery module 200 and the frame 110, in some embodiments, there are multiple grooves 1111, and they are arranged at intervals in the height direction. At the same time, there may also be multiple first protrusions 321 arranged in one-to-one correspondence with the grooves 1111. Arranging multiple grooves 1111 at intervals in the height direction can increase the connection positions with the frame 110, and there are more force points, further improving the connection stiffness.

[0049] Optionally, in some embodiments, the groove 1111 may be configured as a dovetail groove. For example, as Figure 6As shown, in the side sectional view of the battery pack, the groove 1111 is a dovetail groove. Among them, the included angle α between the opposite two side walls of the groove 1111 is: 0 < α < 180°. It should be noted that when the included angle α between the two side walls is 0 or 180°, it can be considered that the two side walls are in a parallel state. In order to improve the connection performance between the first protrusion 321 and the groove 1111, optionally, the included angle α between the opposite two side walls of the groove 1111 is 30° < α < 120°. For example, the included angle α between the two side walls can be 30°, 45°, 60°, 75°, 90°, 115°, 120°, etc. The projection of the groove 1111 in the plane perpendicular to its extending direction forms a dovetail shape, which can prevent the first protrusion 321 from coming out of the groove 1111 and improve the connection performance.

[0050] In addition, the groove 1111 can also extend in the height direction. In the sectional view of the horizontal plane of the battery pack, the groove 1111 is a dovetail groove, and the first protrusion 321 is a dovetail-shaped protrusion extending in the height direction. The cooperation and connection between the two can also play a role in limiting the battery module 200 inside the battery box 100.

[0051] The depth of the groove 1111 is related to the thickness of the frame 110, the size and weight of the battery module 200. In some embodiments, the depth H of the groove 1111 can be 2 - 10 mm. Preferably, the depth H of the groove 1111 can be 3 - 6 mm, where the depth of the groove 1111 can be 3 mm, 5 mm or 6 mm. For example, the groove 1111 can be a dovetail groove, the included angle between its opposite two side walls is 120°, and the depth of the groove 1111 is 5 mm.

[0052] As Figure 3 , Figure 7 and Figure 8 As shown, in some other embodiments, the first connecting portion 111 is configured as at least one second protrusion 1112 arranged at intervals in the height direction on the inner side wall of the frame 110; the second connecting portion 320 is configured as a first recess 322 that is concave inward on the side wall of the glue body 310, and the second protrusion 1112 is connected in cooperation with the first recess 322.

[0053] For example, the first connecting portion 111 may also be a plurality of second protrusions 1112 provided on the inner sidewall of the frame 110 and spaced apart in the height direction, and the second connecting portion 320 is a plurality of first depressions 322 provided on the outer sidewall of the adhesive body 310 and spaced apart in the height direction. Among them, the second protrusions 1112 and the first depressions 322 correspond one by one and can be connected and matched to realize the connection and fixation of the adhesive body 310 and the frame 110. It should be noted that the formation of the second protrusions 1112 and the first depressions 322 is corresponding. For example, if the second protrusions 1112 are arc-shaped protrusions, then the first depressions 322 are arc-shaped depressions adapted to the arc-shaped protrusions.

[0054] In some embodiments, the second protrusions 1112 extend along the extending direction of the frame 110; the first depressions 322 extend along the sidewall of the adhesive body 310. The second protrusions 1112 extend along the extending direction of the outer sidewall of the frame 110, and the first depressions 322 extend along the extending direction of the outer sidewall of the adhesive body 310. Taking a rectangular battery pack as an example, the second protrusions 1112 can be provided on two opposite inner sidewalls of the frame 110 and extend along the extending direction of the frame 110. At the same time, the first depressions 322 can also be provided on two opposite outer sidewalls of the adhesive body 310 and extend along the extending direction of the outer sidewall, so as to realize the connection of the opposite two sides of the adhesive body 310 and the opposite two sides of the frame 110, that is, a limiting effect can be achieved. Of course, the second protrusions 1112 extending circumferentially can also be formed on all the inner sidewalls of the frame 110, and the first depressions 322 extending circumferentially are also provided on the circumferential outer sidewall of the adhesive body 310, which can better realize the connection of the adhesive body 310 and the frame 110 in the circumferential direction, and the limiting effect is better.

[0055] In still other embodiments, taking a rectangular battery pack as an example, the groove 1111 can be provided on two opposite inner sidewalls of the frame 110 and extend along the extending direction of the frame 110. At the same time, the first protrusions 321 can also be provided on two opposite outer sidewalls of the adhesive body 310 and extend along the extending direction of the outer sidewall, so as to realize the connection of the opposite two sides of the adhesive body 310 and the opposite two sides of the frame 110; the second protrusions 1112 can be provided on the other two opposite inner sidewalls of the frame 110 and extend along the extending direction of the frame 110. At the same time, the first depressions 322 can also be provided on the other two opposite outer sidewalls of the adhesive body 310 and extend along the extending direction of the outer sidewall, so as to realize the connection of the other opposite two sides of the adhesive body 310 and the other opposite two sides of the frame 110.

[0056] Such as Figure 5 and Figure 8As shown, optionally, the battery box body 100 further includes a bottom plate 130 connected to the bottom of the frame 110, and the battery pack further includes an upper cover plate 120 connected to the top of the frame 110; the glue body 310 is connected to the bottom plate 130 and / or the upper cover plate 120. Among them, the glue body 310 can be connected to one of the upper cover plate 120 and the bottom plate 130, and the other can be connected to the glue body 310 encapsulating the battery module 200 through the structural glue 400. Of course, the glue body 310 can be connected to the upper cover plate 120 and the bottom plate 130.

[0057] It should be noted that the upper cover plate 120 can include structures such as sheet metal, liquid cooling plate, composite material, etc.

[0058] In some embodiments, the colloid 300 can be a foaming potting glue, which is first potted and foamed under certain conditions to form the glue body 310 and the second connecting portion 320.

[0059] In addition, the battery module 200 is the power supply of the battery pack, and it is not limited to the cell structure, module grouping structure, cell chemical system, etc. The battery box body 100 is the main bearing and fixed installation structure of the battery pack, and it can be an aluminum welded structure member, a cast aluminum part, a sheet metal stamping part, or even an injection molded part, etc.

[0060] Functions of the colloid 300: 1. Effectively fill the narrow space in the electrical connection area, improve the high-voltage creepage distance, and enhance the voltage withstand performance of the whole package; 2. Strengthen the filling structure in the weak area inside the battery pack; 3. Connect the internal structural parts of the battery pack with high-strength structures such as the outer frame 110 and the upper cover plate 120 as a whole to enhance the stiffness of the whole package.

[0061] It should be noted that in addition to the above-mentioned implementation manners, the first connecting portion 111 can also be formed by making a wavy surface or a rough surface on the inner side wall of the frame 110. When the foaming potting glue is formed, it can be filled on the wavy surface or the rough surface of the frame 110, and the limit can also be realized to a certain extent, improving the stiffness of the whole package.

[0062] As Figures 1 to 8 As shown, in a specific embodiment, taking a rectangular battery pack as an example, a plurality of dovetail grooves can be respectively arranged on the opposite inner side walls of the frame 110 in the first direction. The plurality of dovetail grooves are arranged at intervals in the third direction (height direction) and extend along the second direction; at the same time, a plurality of arc-shaped protrusions are arranged on the opposite inner side walls of the frame 110 in the second direction. The plurality of arc-shaped protrusions are arranged at intervals in the third direction (height direction) and extend along the first direction.

[0063] On the opposite outer sidewalls of the glue body 310 in the first direction, a plurality of dovetail-shaped first protrusions 321 are respectively arranged. The plurality of first protrusions 321 are arranged at intervals in the third direction and extend along the second direction. At the same time, on the opposite outer sidewalls of the glue body 310 in the second direction, a plurality of arc-shaped depressions are arranged. The plurality of arc-shaped depressions are arranged at intervals in the third direction and extend along the first direction.

[0064] In the first direction, through the cooperation of the dovetail-shaped first protrusion 321 and the dovetail groove, and in the second direction, through the cooperation of the arc-shaped protrusion and the arc-shaped depression, the connection between the glue body 310 and the frame 110 is realized.

[0065] Among them, the first direction, the second direction, and the third direction are perpendicular to each other. For example, the first direction corresponds to the width direction of the battery pack, the second direction corresponds to the length direction of the battery pack, and the third direction corresponds to the thickness direction of the battery pack (for example, the height direction in the use state).

[0066] Specific assembly applications are as Figure 1 、 Figures 9 to 11 shown:

[0067] The first step: As Figure 9 shown, apply structural adhesive 400 to the corresponding area of the bottom plate 130 of the battery box 100 corresponding to the battery module 200. As Figure 10 shown, install the battery module 200 (while all relevant electrical connectors inside the battery pack are assembled).

[0068] The second step: As Figure 11 shown, pour foaming potting adhesive into the battery box 100;

[0069] The third step: As Figure 1 shown, quickly assemble and cover the upper cover plate 120, and bond all the corresponding glue surfaces to the upper cover plate 120.

[0070] According to the second aspect of the present disclosure, an embodiment of the present disclosure further provides a vehicle. The vehicle includes the above-mentioned battery pack. Therefore, the vehicle also has all the advantages of the above-mentioned battery pack, which will not be elaborated here one by one.

[0071] In some embodiments of the battery pack and the vehicle of the present disclosure, as Figure 9 、 Figure 5 shown, by adding an undercut structure (space) on the surface of the frame 110 and filling the undercut structure (space) with foaming potting adhesive to increase the bonding area and mechanical undercut force of the foaming adhesive with the frame 110; in addition, in some other embodiments, as Figure 9 、 Figure 8As shown, by adding a wavy surface to the surface of the frame 110, the bonding area of the contact surface between the frame 110 and the foaming adhesive is increased to improve the connection performance; in some other embodiments, the adhesion can also be improved by treating the surface roughness of the frame 110 to increase the bonding area of the foaming adhesive. The aluminum surface roughness treatment process mainly includes sandblasting and wire drawing. Among them, the sandblasting process is to clean and roughen the surface of the aluminum alloy through the impact of a high-speed sand stream. This treatment method can increase the roughness of the metal surface, thereby improving the mechanical properties of the aluminum alloy product, such as fatigue resistance, and at the same time enhancing the adhesion and durability of the surface coating. The wire drawing process is to repeatedly scrape the surface of the aluminum alloy with sandpaper until lines appear. This process can provide various patterns, making the aluminum alloy product have both a fashionable and technological sense. These treatment processes have their own characteristics. Sandblasting and wire drawing mainly increase the surface roughness of the frame 110.

[0072] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0073] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any suitable manner. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0074] In addition, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery pack, characterized in that, Comprising: A battery box body, including a frame, and a first connecting portion is formed on the inner side wall of the frame; A battery module, disposed inside the battery box body; And A colloid, including a colloid body for encapsulating the battery module, and a second connecting portion, the first connecting portion and the second connecting portion are connected to form a limit fit in the height direction.

2. The battery pack according to claim 1, wherein The first connecting portion is configured as a groove; The second connecting portion is configured as a first protrusion that cooperates with the groove; and / or The first connecting portion is configured as at least one second protrusion that is arranged at intervals along the height direction on the inner side wall of the frame; The second connecting portion is configured as a first recess that is recessed inwardly on the side wall of the colloid body, and the second protrusion is connected in cooperation with the first recess.

3. The battery pack according to claim 2, wherein The groove extends along the extending direction of the frame; the first protrusion extends along the side wall of the colloid body.

4. The battery pack according to claim 2, wherein There are a plurality of the grooves, and they are arranged at intervals in the height direction.

5. The battery pack according to claim 2, characterized in that, The included angle α between the opposite two side walls of the groove is: 0 < α < 180°.

6. The battery pack according to claim 5, characterized in that, The included angle α between the opposite two side walls of the groove is: 30° < α < 120°.

7. The battery pack according to claim 2, wherein, The depth of the groove is 2 - 10 mm.

8. The battery pack according to claim 2, characterized in that, The second protrusion extends along the extending direction of the frame; The first recess extends along the side wall of the colloid body.

9. The battery pack according to claim 1, wherein, The battery box body further includes a bottom plate connected to the bottom of the frame, and the battery pack further includes an upper cover plate connected to the top of the frame; The colloid body is connected to the bottom plate and / or the upper cover plate.

10. The battery pack according to claim 1, wherein, The colloid is a foaming potting adhesive.

11. A vehicle, characterized in that, The vehicle includes the battery pack according to any one of claims 1 - 10.

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