Battery pack shell, battery pack and vehicle

Abstract

The utility model relates to a battery pack shell, a battery pack and a vehicle, the battery pack shell comprises a first shell assembly and a second shell assembly, the first shell assembly comprises an upper cover and a reinforcing part, the edge of the upper cover extends outwards to form a first connecting part, the reinforcing part covers the top surface of the upper cover and is in contact with the first connecting part, and the second shell assembly is in contact with the reinforcing part. The first shell assembly is arranged on the upper cover and is fixedly connected with at least one of the top surface of the upper cover and the first connecting part, the second shell assembly is fixedly connected with the first connecting part, and the second shell assembly and the first shell assembly can define an inner cavity for placing a battery cell. According to the battery pack shell disclosed by the utility model, the second shell assembly is directly and fixedly connected with the first shell assembly through the first connecting part, and a boundary beam is not arranged between the first shell assembly and the second shell assembly, so that the boundary beam-free effect is realized, and the stability of the connection between the first shell assembly and the second shell assembly can be ensured.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicle battery pack, in particular, to a battery pack shell, and a battery pack and a vehicle applying the battery pack shell. BACKGROUND

[0002] The battery pack is an energy storage and supply system of an electric passenger car, and the shell of the battery pack is mainly composed of a box cover, a battery cell, a box body frame, a cold plate and a guard plate. The box cover only serves as an independent structural member without other integrated functions. The box body frame needs to be separately processed and formed, and is made by extruding and welding aluminum profiles. Due to the low production efficiency, high energy consumption and high cost of the aluminum extrusion process, the box body frame may have a risk of sealing failure after being welded with the box cover, the cold plate and other structures, thereby affecting the processing and assembly efficiency. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present disclosure is to provide a battery pack shell which integrates the upper cover with the reinforcing member, realizes the edge beam-free of the battery pack shell, and has high strength.

[0004] To achieve the above purpose, the first aspect of the present disclosure provides a battery pack shell, comprising:

[0005] A first shell assembly comprises an upper cover and a reinforcing member. The edge of the upper cover extends outward to form a first connecting part. The reinforcing member is arranged on the top surface of the upper cover and is in contact with the first connecting part and fixedly connected with at least one of the top surface of the upper cover and the first connecting part.

[0006] A second shell assembly is fixedly connected with the first connecting part and can form an inner cavity for placing a battery cell together with the first shell assembly.

[0007] Optionally, the upper cover comprises a top plate and a first side plate located at the edge of the top plate. The first connecting part is formed by extending the edge of the first side plate outward. The reinforcing member is annular and arranged at the edge of the top plate, comprising a first plate member connected with the top plate and a second plate member connected with the first connecting part.

[0008] Optionally, the first end of the first plate member is in contact with the top surface of the top plate, and the second end extends away from the top plate. The first end of the second plate member is connected with the second end of the first plate member, and the second end extends toward the first connecting part. The reinforcing member further comprises a third plate member fixedly connected with the first connecting part and also connected with the second end of the second plate member.

[0009] Optionally, the second end of the first plate member extends at least beyond the edge of the top plate, so that the second plate member is spaced apart from the first side plate to form a buffer cavity.

[0010] Optionally, the second housing assembly comprises a uniform temperature plate and a flow channel plate, the uniform temperature plate and the flow channel plate are in a box shape, comprising a bottom plate and a second side plate arranged at the edge of the bottom plate, the flow channel plate is sleeved outside the uniform temperature plate, the second side plates of the uniform temperature plate and the flow channel plate are provided with outwardly extending second connecting parts at positions away from the edge of the bottom plate, the second connecting parts on the uniform temperature plate and the flow channel plate are attached to each other and are fixed through the second connecting parts to form the second housing assembly.

[0011] Optionally, the second side plates of the uniform temperature plate and the flow channel plate are connected to the bottom plate on one side and extend outwardly and obliquely relative to the bottom plate on the other side.

[0012] Optionally, the top surface of the bottom plate of the flow channel plate is provided with fins, and the fins are in contact with the bottom surface of the uniform temperature plate.

[0013] Optionally, the bottom of the flow channel plate is fixedly connected with a bottom guard plate.

[0014] Optionally, a plurality of concentric connecting holes are arranged on the upper cover, the reinforcing member, the first connecting part, the second connecting part and the bottom plate, and the connecting holes are used to arrange connecting members to fixedly connect the bottom guard plate with the first housing assembly and the second housing assembly.

[0015] Optionally, the first housing assembly and the second housing assembly are fixedly connected through a sealing glue.

[0016] The second aspect of the present disclosure also provides a battery pack comprising the battery pack housing and the battery cell in the above embodiments.

[0017] The third aspect of the present disclosure also provides a vehicle comprising the battery pack in the above embodiments.

[0018] Compared with the prior art, the battery pack housing of the present utility model has the advantages that the first housing assembly and the second housing assembly of the battery pack housing are directly fixedly connected through the first connecting part on the upper cover, no edge beam is arranged between the first housing assembly and the second housing assembly, no edge beam is realized, the stability of the connection between the first housing assembly and the second housing assembly is ensured, the problem of leakage caused by poor welding between the housing and the edge beam does not occur, the reinforcing member is further arranged on the upper cover to further strengthen the strength of the upper cover and the first connecting part, the stability of the two during use of the battery pack is ensured, the connection between the second housing assembly is not unstable due to damage of the upper cover or the first connecting part, and the problem of damage of the battery pack housing is avoided.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and serve to explain the principles of the present disclosure, but are not intended to limit the present disclosure. In the drawings:

[0021] Figure 1 is a structural schematic diagram of a battery pack shell provided in an exemplary embodiment of the present disclosure;

[0022] Figure 2 is a partial enlarged view of a sectional view of a battery pack shell provided in an exemplary embodiment of the present disclosure;

[0023] Figure 3 is an exploded view of a battery pack shell provided in an exemplary embodiment of the present disclosure;

[0024] Figure 4 is an exploded view of a second shell assembly in a battery pack shell provided in an exemplary embodiment of the present disclosure.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1 - first shell assembly; 11 - upper cover; 111 - first connecting part; 112 - top plate; 113 - first side plate; 12 - reinforcing part; 121 - first plate part; 122 - second plate part; 123 - third plate part; 13 - buffer cavity; 14 - sealing foam;

[0027] 2 - second shell assembly; 21 - uniform temperature plate; 22 - flow channel plate; 23 - bottom plate; 24 - second side plate; 25 - second connecting part; 26 - fin; 27 - bottom guard plate; 28 - connecting hole; 29 - connecting part; 3 - inner cavity. DETAILED DESCRIPTION

[0028] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0029] In the present disclosure, the orientation words such as "upper, lower, high, low, top, bottom" used without the opposite description generally refer to the orientation of the corresponding components or structures in the direction of gravity, and specifically can refer to the orientation of the corresponding components or structures in the direction of gravity in the figures. Figure 1The shown figure surface direction. "Inner, outer" refers to the inner and outer of the profile of the corresponding components. In addition, it should be noted that the terms such as "first, second" are used to distinguish one element from another element, and do not have sequentiality and importance. In addition, in the description referring to the drawings, the same reference signs in different drawings represent the same elements. The above definitions are only for the explanation and illustration of the present disclosure, and should not be understood as a limitation of the present disclosure.

[0030] For the convenience of understanding, the following refers to the accompanying Figures 1 to 4 The specific structure and working principle of the battery pack shell of the present disclosure are described in detail in conjunction with the embodiments.

[0031] The present disclosure relates to a battery pack shell, referring to Figure 1 and Figure 2 , comprising a first shell assembly 1 and a second shell assembly 2, wherein the first shell assembly 1 comprises an upper cover 11 and a reinforcing member 12, the upper cover 11 is located at the top of the battery pack shell, and the edge position extends outward to form a first connecting part 111, which can be sheet-shaped, formed by extending outward from the edge of the upper cover 11, or subsequently spliced to form, the reinforcing member 12 is arranged on the top surface of the upper cover 11 and contacts the first connecting part 111, and the reinforcing member 12 is fixedly connected with at least one of the first connecting part 111 or the top surface of the upper cover 11, and the fixed connection can be achieved by welding, bonding or other connection methods known to those skilled in the art, which will not be described in detail here. The second shell assembly 2 is fixedly connected with the first connecting part 111, and an inner cavity 3 for placing the battery cell is formed between the first shell 1 and the second shell assembly 2. By arranging the reinforcing member 12, the strength of the upper cover 11 and the first connecting part 111 can be enhanced, the stability of the upper cover 11 and the first connecting part 111 during use can be ensured, and the stability of the connection between the first connecting part 111 and the second shell assembly 2 can be ensured, so as to avoid damage to the first connecting part 111 during use and leakage of the battery pack shell.

[0032] In the battery pack shell of the present disclosure, the first shell assembly 1 and the second shell assembly 2 are directly fixedly connected through the first connecting part 111 on the upper cover 11, and no edge beam is arranged between the first shell assembly 1 and the second shell assembly 2, which realizes the edge beam-free, thereby ensuring the stability of the connection between the first shell assembly 1 and the second shell assembly 2, and avoiding the problem of leakage caused by poor welding between the shell and the edge beam. In addition, the reinforcing member 12 is arranged on the upper cover 11, which further enhances the strength of the upper cover 11 and the first connecting part 111, ensures the stability of the two during use of the battery pack, and avoids the instability of the connection between the second shell assembly 2 due to damage to the upper cover 11 or the first connecting part 111, thereby avoiding the problem of damage to the battery pack shell.

[0033] In one embodiment of the present disclosure, referring to Figure 1 and Figure 2 The first housing assembly 1 and the second housing assembly 2 are fixedly connected by the sealant. The end face of the first connecting portion 111 of the upper cover 11 towards the second housing assembly 2 can be provided with a glue groove, and the end face of the second housing assembly 2 towards the first housing assembly 1 can also be provided with a glue groove matched with the glue groove on the upper cover 11. When connecting, the first housing assembly 1 and the second housing assembly 2 can be butted against each other, and then the sealant is injected into the glue groove, so that the fixed connection between the first housing assembly 1 and the second housing assembly 2 is completed. Of course, in other embodiments, the first housing assembly 1 and the second housing assembly 2 can also be fixedly connected by other ways. For example, the sealing foam 14 can be arranged between the first housing assembly 1 and the second housing assembly 2 to further enhance the sealing performance and the stability of the connection between the first housing assembly 1 and the second housing assembly 2. The specific arrangement can be determined according to the actual situation, and the present disclosure does not limit this.

[0034] In one embodiment of the present disclosure, referring to Figure 1 and Figure 2 The upper cover 11 includes a top plate 112 and a first side plate 113 located at the edge of the top plate. The first side plate 113 can be perpendicular to the top plate 112, or can be arranged at an obtuse angle with the top plate 112. The first connecting portion 111 is formed by extending outward from the edge of the first side plate 113, and the first connecting portion 111 can be perpendicular to the first side plate 113, or can be arranged at an angle with the first side plate 113. The specific arrangement can be determined according to the actual situation. The reinforcing member 12 is annular and matched with the shape of the upper cover 11. For example, the upper cover 11 is rectangular, and the reinforcing member 12 is a rectangular ring. The annular reinforcing member 12 includes a first plate member 121 connected with the top plate 112 and a second plate member 122 connected with the first connecting portion 111. The connection can be by welding or adhesion, or other connection methods known to those skilled in the art. In some other embodiments, the connection between the reinforcing member 12 and the upper cover 11 can be completed by the connection between the first plate member 121 and the top plate 112, or the connection between the second plate member 122 and the first connecting portion 111, so as to improve the strength of the upper cover 11 by the connection between the reinforcing member 12 and the top plate 113 and the first connecting portion 111.

[0035] In one embodiment of the present disclosure, referring to Figure 1 and Figure 2The reinforcing member 12 further comprises a third plate member 123 fixedly connected with the first connecting portion 111. For example, the first connecting portion 111 is plate-shaped, and the third plate member 123 is attached to the plate-shaped first connecting portion 111 and fixedly connected therewith by welding or adhesion. In this embodiment, the first end of the first plate member 121 is in contact with the top surface of the top plate 112, and the second end extends away from the top plate 112. The first end of the second plate member 122 is connected with the second end of the first plate member 121, and the second end extends toward the first connecting portion 111 and is connected with the third plate member 123. The third plate member 123 can enhance the stability of the connection between the first plate member 111 and the second plate member 122, and can increase the contact area by forming a surface contact between the third plate member 123 and the first connecting portion 111, thereby better enhancing the strength of the upper cover 11. Of course, in other embodiments, the reinforcing member 12 can have other structures, which can be determined according to actual conditions, such as the working conditions of the battery pack, and the present disclosure does not limit this.

[0036] In one embodiment of the present disclosure, referring to Figure 1 and Figure 2 , the second end of the first plate member 121 extends at least beyond the edge of the top plate 112, so that the second plate member 122 connected with the second end of the first plate member 121 can be spaced apart from the first side plate 113 to form a buffer cavity 13. By forming the buffer cavity 13, the second plate member 122 of the reinforcing member 12 can deform in the direction of the first side plate 113 to absorb the impact force when the upper cover 11 is subjected to impact, thereby avoiding damage to the upper cover 11 caused by impact, and thereby improving the impact resistance of the battery pack shell of the present disclosure.

[0037] In one embodiment of the present disclosure, referring to Figure 1 and Figure 2 , the second shell assembly 2 comprises a uniform temperature plate 21 and a flow channel plate 22, both of which are box-shaped and comprise a bottom plate 23 and a second side plate 24 located at the edge of the bottom plate 23. One side of the second side plate 24 is connected with the bottom plate 23, and the other side can extend outwardly inclined relative to the bottom plate 23, so as to be more convenient for processing and manufacturing compared with the structure in which the second side plate 24 is perpendicular to the bottom plate 23, and the second side plate 24 extending outwardly inclined can also make the inner cavity 3 formed between the second shell assembly 2 and the first shell assembly 1 have a larger volume.

[0038] In this embodiment, referring to Figure 3 and Figure 4The flow channel plate 22 is sleeved outside the uniform temperature plate 21, and the second side plate 24 in the uniform temperature plate 21 and the flow channel plate 22 extends outward from the edge position of the bottom plate 23 to form a second connecting part 25. When the flow channel plate 22 is sleeved outside the uniform temperature plate 21, the second connecting parts 25 of the two are attached to each other, and then the second connecting parts 25 of the two can be fixedly connected by a connection method known to those skilled in the art such as welding and bonding, so as to complete the fixed connection between the uniform temperature plate 21 and the flow channel plate 22 to form a second outer shell assembly. By fixedly connecting and integrating the uniform temperature plate 21 and the flow channel plate 22, the weight of the entire battery pack shell can be reduced, and the uniform temperature plate 21 and the flow channel plate 22 can also serve as a cold plate function and a tray function to accommodate the battery cell after integration, so that the flow channel plate 22 and the uniform temperature plate 21 can also participate in the load bearing and bottom protection of the battery pack, thereby further improving the safety performance of the battery pack. Of course, in other embodiments, the second outer shell assembly 2 can also have other structures, which can be determined according to actual conditions, and the present disclosure does not limit this.

[0039] In an embodiment of the present disclosure, referring to Figure 3 and Figure 4 The bottom plate 23 of the flow channel plate 22 is provided with fins 26, which are in contact with the bottom surface of the bottom plate 23 of the uniform temperature plate 21 when the flow channel plate 22 is sleeved on the uniform temperature plate 21. The fins 26 can be made of metal material and have a conventional fin 26 structure, for example, can be corrugated or serrated, etc. By providing the fins 26, on the one hand, the heat exchange capacity of the uniform temperature plate 21 and the flow channel plate 22 can be improved to a certain extent, and on the other hand, the fins 26 are in contact with the uniform temperature plate 21, which can also protect the uniform temperature plate 21. When the uniform temperature plate 21 collides due to external environmental factors, the force received by the uniform temperature plate 21 is absorbed and buffered, so as to avoid damage to the uniform temperature plate 21 in the case of collision, thereby improving the safety performance of the battery pack.

[0040] In an embodiment of the present disclosure, referring to Figure 3 and Figure 4 Figure 1 Figure 3In the bottom of the flow channel plate 22, a bottom guard plate 27 is fixedly connected. By arranging the bottom guard plate 27, the battery pack can be better protected, the overall rigidity and carrying capacity of the battery pack can be improved, the force applied to the battery pack by external impact can be reduced when the battery pack is subjected to external impact, and the service life of the battery can be effectively prolonged. In the present embodiment, a plurality of concentric connection holes 28 are arranged on the upper cover 11, the reinforcing member 12, the first connecting portion 111, the second connecting portion 25 and the bottom guard plate 27. When the bottom guard plate 27 and the battery pack shell are connected, the connecting holes 28 can facilitate the connecting member 29 to pass through the upper cover 11, the reinforcing member 12, the first connecting portion 111, the second connecting portion 25 and the bottom guard plate 27 in sequence, so as to fixedly connect the bottom guard plate 27 with the first shell assembly 1 and the second shell assembly 2. The connecting holes 28 can be bolt holes, and the connecting member 29 can be a bolt. When connected, the bolt holes in each different component are sequentially passed through to complete the connection, which is also convenient for disassembly. Of course, in other embodiments, the structure for fixedly connecting the bottom guard plate 27 with the first shell assembly 1 and the second shell assembly 2 can also be other types, which can be determined according to actual conditions, and the present disclosure does not limit this.

[0041] When the battery pack shell of the present disclosure is used, the upper cover 11 and the reinforcing member 12 can be fixedly connected by welding, and then the second connecting portion 25 in the uniform temperature plate 21 and the flow channel plate 22 is also fixedly connected by welding to form the second shell assembly 2. When assembling the battery pack, the battery cell can be first adhered to the bottom surface of the top plate 112 of the upper cover 11 by structural glue, then the battery cell is loaded into the cavity formed between the bottom plate 23 and the second side plate 24 of the uniform temperature plate 21 by the inverted buckle method, and finally the first shell assembly 1 and the second shell assembly 2 are fixedly connected by structural glue to complete the assembly of the battery cell.

[0042] The second aspect of the present disclosure also provides a battery pack comprising the battery pack shell described in the above embodiments and a battery cell. The battery cell is located in the inner cavity 3 formed between the first shell assembly 1 and the second shell assembly 2 of the battery pack shell. The specific installation process can be referred to the description in the above embodiments, which will not be described in detail here. The shell of the battery pack of the present disclosure is a beamless shell, and the first shell assembly 1 and the second shell assembly 2 are directly connected, which reduces the rolling steel or extruded aluminum profile, is simple to manufacture and low in cost, improves the integration of the battery pack, has good strength and is not easy to be damaged during use, and has a long service life.

[0043] The third aspect of the present disclosure also provides a vehicle comprising the battery pack described in the above embodiments, which can effectively ensure the stability of the battery pack shell during driving of the vehicle, has low cost and a long service life.

[0044] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and all these simple modifications shall fall within the protection scope of the present disclosure.

[0045] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not describe each possible combination manner again.

[0046] In addition, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it shall be considered as disclosed by the present disclosure.

Claims

1. A battery pack casing, characterized in that, include: The first housing assembly includes a top cover and a reinforcing member. The edge of the top cover extends outward to form a first connecting portion. The reinforcing member covers the top surface of the top cover and contacts the first connecting portion, and is fixedly connected to at least one of the top surface of the top cover and the first connecting portion. The second housing assembly is fixedly connected to the first connecting portion and can be enclosed with the first housing assembly to form an inner cavity for placing the battery cell.

2. The battery pack casing according to claim 1, characterized in that, The top cover includes a top plate and a first side plate located at the edge of the top plate. The first connecting portion extends outward from the edge of the first side plate. The reinforcing member is annular and is disposed at the edge of the top plate. It includes a first plate connected to the top plate and a second plate connected to the first connecting portion.

3. The battery pack casing according to claim 2, characterized in that, The first end of the first plate is in contact with the top surface of the top plate, and the second end extends away from the top plate. The first end of the second plate is connected to the second end of the first plate, and the second end extends toward the first connecting part. The reinforcing member also includes a third plate, which is fixedly connected to the first connecting part and also connected to the second end of the second plate.

4. The battery pack casing according to claim 3, characterized in that, The second end of the first plate extends at least beyond the edge of the top plate, such that the second plate is spaced apart from the first side plate to form a buffer cavity.

5. The battery pack casing according to claim 1, characterized in that, The second housing assembly includes a heat spreader and a flow channel plate. The heat spreader and the flow channel plate are box-shaped and include a bottom plate and a second side plate disposed on the edge of the bottom plate. The flow channel plate is sleeved on the heat spreader. The second side plate of the heat spreader and the flow channel plate are provided with outwardly extending second connecting portions at the edges away from the bottom plate. The second connecting portions of the heat spreader and the flow channel plate fit together and are fixed together by the second connecting portions to form the second housing assembly.

6. The battery pack casing according to claim 5, characterized in that, One side of the second side plate of the heat spreader and flow channel plate is connected to the bottom plate, and the other side extends outward at an angle relative to the bottom plate.

7. The battery pack casing according to claim 5, characterized in that, The bottom plate of the flow channel plate has fins on its top surface, and the fins are in contact with the bottom surface of the heat spreader.

8. The battery pack casing according to claim 5, characterized in that, A bottom guard plate is fixedly connected to the bottom of the flow channel plate.

9. The battery pack casing according to claim 8, characterized in that, The top cover, reinforcing member, first connecting part, second connecting part, and bottom protective plate are all provided with multiple concentric connecting holes. The connecting holes are used to install connecting members to fix the bottom protective plate to the first housing assembly and the second housing assembly.

10. The battery pack casing according to claim 1, characterized in that, The first housing assembly and the second housing assembly are fixedly connected by sealant.

11. A battery pack, characterized in that, It includes the battery pack casing and battery cell as described in any one of claims 1-10.

12. A vehicle, characterized in that, Includes the battery pack described in claim 11.

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