Packaging case and battery pack

Abstract

A packaging case and a battery pack. The packaging case comprises a first shell (11) and a second shell (12); the first shell (11) and the second shell (12) can be sealingly engaged, and at least one of the first shell (11) or the second shell (12) comprises a plastic shell body (101) and a heat sink (102); the plastic shell body (101) is provided with a shell cavity at least partially accommodating a battery cell module (2). An opening is formed in at least one of the side wall or the bottom wall of the plastic shell body (101), and the heat sink (102) sealingly covers the opening and is integrally connected to the plastic shell body (101). The heat sink (102) and the plastic are integrated into an integral component to accommodate and seal the battery cell module (2), so that efficient waterproofing can be achieved, the weight of the shell can be reduced, and good heat dissipation performance is also achieved. Heat dissipation, waterproofing and dustproofing, and lightweight requirements of a battery are satisfied at the same time, such that the present application is suitable for various occasions, and the present application aims to solve the problem in the prior art that battery cases cannot achieve good waterproof and lightweight performance at the same time and thus are inconvenient to use.

Description

Packaging shell and battery pack Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a packaging shell and a battery pack. Background Art

[0002] The application of power batteries is becoming increasingly widespread. Their cells tend to generate high temperatures during operation, and usually require heat dissipation settings to dissipate heat.

[0003] Currently, heat dissipation holes are provided in the battery casing, and a fan is installed on the casing to remove heat from the battery cells through airflow. However, this structure increases the battery's size and weight, making it difficult to place on equipment, reduces the battery's overall energy density, and is not waterproof, limiting its use.

[0004] Some batteries use a sealed, all-metal casing to provide waterproofing. However, metal is heavy, which increases the overall weight of the battery and reduces its energy density. Therefore, this makes it unsuitable for devices requiring lightweight batteries, such as drones, and is also inconvenient to use.

[0005] Summary of the Invention

[0006] In view of this, the present application is dedicated to providing a packaging shell and battery pack with the advantages of light weight, high waterproof performance and easy heat dissipation, aiming to solve the problem that the battery shell in the existing technology cannot well take into account both waterproof and weight reduction performance and is inconvenient to use.

[0007] The present application provides a packaging shell, including a first shell and a second shell, the first shell and the second shell are sealed and fastened together, and at least one of the first shell or the second shell includes a plastic main shell and a heat sink, the plastic main shell has a shell cavity for accommodating at least a part of a battery cell module, at least one of the side walls or the bottom wall of the plastic main shell is provided with an opening, the heat sink seals the opening and is connected to the plastic main shell as a whole.

[0008] In a possible implementation manner, the heat sink is a metal sheet and is injection-molded with the plastic main shell to form an integral structure.

[0009] In a possible implementation manner, the heat sink is embedded in a groove on the plastic main shell.

[0010] In a possible implementation manner, a portion of the plastic main shell is inserted into the heat sink and clamps the heat sink.

[0011] In one possible embodiment, the heat sink has a countersunk slotted hole arranged along the thickness direction, the countersunk slotted hole includes a through-hole-shaped hole body and a slot body located at one axial end of the hole body, the slot body is located on a first side in the thickness direction of the heat sink, and a plurality of countersunk slotted holes are provided and distributed along the circumference of the heat sink;

[0012] The plastic main shell includes a shell located on the second side of the heat sink in the thickness direction and covering the hole, a column connected to the shell and penetrating the hole, and an anti-slip boss connected to the column and stuck in the slot.

[0013] In a possible implementation, the heat sink includes a bottom plate; wherein,

[0014] The bottom plate includes a main body area and a frame area arranged around the main body area. The thickness of the main body area gradually decreases from the center to both ends in the width direction or the length direction.

[0015] In a possible implementation manner, the thickness of the bottom plate is not less than 1.2 mm.

[0016] In a possible implementation, the heat sink includes a base plate and a plurality of fins arranged on the base plate.

[0017] In one possible embodiment, the thickness of the fin is not less than 1.5 mm;

[0018] In a possible embodiment, the distance between two adjacent fins is not less than 4 mm;

[0019] In a possible implementation, the two heat dissipation surfaces of the fin gradually approach each other in a direction away from the base plate.

[0020] In a possible implementation manner, the included angle between the two heat dissipation surfaces is R, and 8°≥R≥4°.

[0021] In a possible implementation manner, an inner wall of the heat sink is flush with an inner wall of a side wall of the plastic main shell where the opening is located.

[0022] In a possible implementation manner, ribs are provided on the bottom wall of the shell cavity of the packaging shell to enhance the strength of the bottom of the packaging shell.

[0023] In a possible implementation, the heat sink is made of one or more of metal sheets and graphite.

[0024] In one possible implementation, the metal includes one or more of a single substance, an alloy, or a composite material of aluminum and / or copper.

[0025] The present application also provides a battery pack, comprising a battery cell module and a packaging shell as described in any of the above embodiments.

[0026] In a possible embodiment, a heat conducting member is provided inside the packaging shell, one side of the heat conducting member is in contact with the battery core module, and the other side is in contact with the inner wall of the heat sink.

[0027] In a possible implementation, the heat conducting member includes any one or more of a heat conducting silicone sheet, a graphite sheet, and a phase change member filled with a phase change material.

[0028] In a possible implementation, a flexible member is provided between the battery cell module and an area of ​​the packaging shell other than a portion where the heat sink is provided.

[0029] According to the packaging shell provided by the present application, the first shell and the second shell are sealed and buckled together to form a sealed shell, and the first shell and / or the second shell include a plastic main shell and a heat sink connected to the plastic main shell as an integral part, that is, the heat sink and the plastic main shell are combined into an integral component to accommodate and seal the battery module. Compared with the two structures of adding a fan to the shell and the full metal shell, it can effectively reduce the weight, that is, it can effectively reduce the weight of the battery other than the battery module, thereby significantly reducing the adverse effects on the battery energy density, and can be both highly waterproof and reduce the weight of the shell. In addition, the heat dissipation of the battery module can be dissipated through the heat sink, and it also has good heat dissipation performance, while meeting the heat dissipation, waterproof and dustproof and lightweight requirements of the battery. Therefore, it is suitable for a variety of occasions and easy to use, which solves the problem that the battery shell in the prior art cannot give a good balance between waterproof and weight reduction performance and is not convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram showing a three-dimensional structure of a packaging shell according to an embodiment of the present application.

[0031] FIG2 is a schematic diagram of an exploded structure of the main structure of a battery pack according to an embodiment of the present application.

[0032] FIG3 is a front view of a heat sink according to an embodiment of the present application.

[0033] FIG4 is a side view of a heat sink according to an embodiment of the present application.

[0034] FIG5 is a rear view of a heat sink according to an embodiment of the present application.

[0035] FIG6 is a bottom view of a heat sink according to an embodiment of the present application.

[0036] FIG7 is a SS cross-sectional view of the heat sink in FIG3 .

[0037] FIG8 is an axonometric view of a plastic main housing according to one embodiment of the present application.

[0038] FIG9 is a side view of a plastic main housing according to an embodiment of the present application.

[0039] FIG10 is a cross-sectional view of the plastic main housing taken along line XX in FIG9 .

[0040] FIG. 11 is a partial enlarged view of the plastic main shell in FIG. 10 .

[0041] FIG. 12 is a front view of a packaging shell according to an embodiment of the present application.

[0042] FIG13 is a PP cross-sectional view of the packaging shell in FIG12 .

[0043] Reference numerals:

[0044] 11. First shell; 12. Second shell; 101. Plastic main shell; 110. First side wall; 111. Shell; 112. Column; 113. Anti-slip boss; 114. Rib; 102. Heat sink; 121. Bottom plate; 122. Fin; 123. Countersunk slot; 2. Battery module; 3. Thermal conductor. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] Please refer to Figures 1 to 13. The present application provides a packaging shell that can be used in the battery field and is used to package a battery module 2 to assemble a battery. The packaging shell includes a first shell 11 and a second shell 12. The first shell 11 and the second shell 12 can be sealed and fastened together to form an integral sealed shell, effectively protecting the battery module 2. The size of the first shell 11 and the second shell 12 is not specifically limited. The first shell 11 can be the main shell and accommodate the battery module 2, while the second shell 12 is the shell cover. Alternatively, the first shell 11 and the second shell 12 can be close in height and each independently accommodates a part of the battery module 2.

[0047] The first shell 11 and / or the second shell 12 comprises a main plastic shell 101 and a heat sink 102. The main plastic shell 101 is provided with a housing cavity, forming a box-like structure that accommodates at least a portion of the battery cell module 2. The sidewalls and / or bottom wall of the main plastic shell 101 are provided with openings, which are sealed by the heat sink 102 and integrally connected to the main plastic shell 101. This arrangement allows the first shell 11 and / or the second shell 12 to be a one-piece component, with the main body being made of plastic and the heat sink 102 being part of the housing. This structure, in which the heat sink 102 and plastic are combined into a single component to house the battery cell module 2, significantly reduces weight compared to designs with fans installed within the shell or all-metal shells. Specifically, it can effectively reduce the weight of the battery outside of the battery cell module 2, thereby significantly reducing the negative impact on the battery's energy density. In other words, batteries composed of this packaging shell have a higher energy density than conventional batteries with fans or all-metal shells. The packaging case not only reduces the weight of the housing but also provides high waterproof performance. Furthermore, the heat of the battery module 2 can be dissipated through the heat sink 102, thereby providing excellent heat dissipation performance. Simultaneously, it meets the battery's heat dissipation, waterproof and dustproof, and lightweight requirements, making it suitable for a variety of occasions and easy to use. This solves the problem of conventional battery housings that cannot effectively achieve both waterproof and weight reduction performance and are therefore inconvenient to use.

[0048] The main body of the first housing 11 and / or the second housing 12 is a plastic main shell 101, which is integrally formed by injection molding. Compared to metal housings, this requires no assembly and is made of a cheaper material, which helps reduce costs. Furthermore, it is easier to form housings in various shapes and sizes to accommodate battery modules 2 of different sizes and shapes, improving adaptability, flexibility, and convenience, and also facilitating standardized production.

[0049] Specifically, in an embodiment where the first housing 11 serves as the main housing and houses the cell module 2, and the second housing 12 serves as the housing cover, the first housing 11 comprises a plastic main housing 101 and heat sink 102, while the second housing 12 can serve as a plastic cover and may not include heat sink 102. This allows for further simplified manufacturing without affecting the heat dissipation of the cell module 2. In embodiments where the first and second housings 11, 12 are relatively close in height, the first and second housings 11, 12 can each independently comprise a plastic main housing 101 and heat sink 102, or the housing serving as the inner housing can be provided with heat sink 102, while the housing serving as the cover is entirely plastic.

[0050] The heat sink 102 is a thermally conductive sheet, such as a metal sheet or graphite sheet. Specifically, the metal sheet can be aluminum or copper, which has excellent heat dissipation properties. On the battery pack, the heat sink 102 can be positioned against the cell module 2 or connected to the cell module 2 via a thermally conductive structure. In either case, heat from the cell module 2 can be effectively dissipated to the exterior of the battery pack.

[0051] The heat sink 102 and the plastic main shell 101 are connected as one body, which can be injection molding. For example, in some embodiments, the heat sink 102 is a metal sheet and is injection molded as an integral structure with the plastic main shell 101, that is, the metal sheet is placed in a mold used to form the plastic main shell 101, and after injection molding, it can be an integral structure with the plastic main shell 101.

[0052] Of course, in some other embodiments, the heat sink 102 may also be sealed and connected to the plastic main housing 101, such as by welding (eg, laser welding). In this way, the heat sink 102 and the plastic main housing 101 may also be connected as one body.

[0053] The heat sink 102 can also be embedded in the plastic main housing 101, such as by being embedded in a groove on the plastic main housing 101. Alternatively, the heat sink 102 can be snap-fitted to the plastic main housing 101, such as by inserting a portion of the plastic main housing 101 into the heat sink 102 and locking it in place. This arrangement can enhance the connection strength between the heat sink 102 and the plastic main housing 101, and improve the housing's stability, such as its drop resistance and shock resistance.

[0054] For example, in some embodiments, the plastic main shell 101 has an annular insertion groove along the circumference of the opening, and all edges of the heat sink 102 are embedded in the insertion groove of the plastic main shell 101. Alternatively, the plastic main shell 101 circumferentially wraps around all edges of the heat sink 102. For example, during injection molding, a support platform is provided on the bottom wall of the mold, and the heat sink 102 is placed on the support platform with its edges suspended in the air. In this way, after injection molding, the plastic main shell 101 completely wraps around the edges of the heat sink 102.

[0055] Alternatively, in some embodiments, as shown in Figures 2, 3, and 5, the heat sink 102 has a countersunk slot 123 arranged along the thickness direction. The countersunk slot 123 includes a hole body in the shape of a through hole and a slot body located at one axial end of the hole body. The length of the slot body is greater than the diameter of the hole body, and the depth of the slot body is less than the thickness of the heat sink 102, that is, the axial length of the hole body. At the same time, there are multiple countersunk slots 123 and they are distributed along the circumference of the heat sink 102. The side where the slot of the slot body is located is recorded as the first side of the heat sink 102 in the thickness direction. When the heat sink 102 is placed in the mold and injection molding is performed, the liquid plastic will cover the hole body on the second side of the heat sink 102 and be injected into the hole body and the slot body, forming a shell 111 located on the second side of the heat sink 102 in the thickness direction and covering the hole body, a column 112 connected to the shell 111 and penetrating the hole body, and an anti-slip boss 113 connected to the column 112 and stuck in the slot body, as shown in Figures 10 and 11. In this way, the heat sink 102 is integrated with the plastic main shell 101 to form an injection-molded integrated structure, and the heat sink 102 is embedded in the plastic main shell 101, and the plastic main shell 101 is snap-fitted to the heat sink 102, effectively enhancing the connection stability and the overall structural strength.

[0056] The plastic main housing 101 may be provided with one, two, or more heat sinks 102. If provided with one heat sink 102, it may be located on a sidewall of the plastic main housing 101, for example, on the largest sidewall of the plastic main housing 101. This achieves both heat dissipation and weight reduction.

[0057] In some embodiments, as shown in FIG13 , the inner wall of the heat sink 102 (the wall of the heat sink 102 facing the interior of the plastic main housing 101) is flush with the inner wall of the side wall where the opening of the plastic main housing 101 is located. This prevents the inner wall of the housing from being uneven and causing damage to the battery module 2.

[0058] As shown in FIG. 3 to FIG. 7 , the heat sink 102 includes a bottom plate 121 . The thickness of the bottom plate 121 is not less than 1.2 mm to ensure structural strength and heat absorption performance.

[0059] In some embodiments, the bottom plate 121 includes a main body area and a frame area arranged around the main body area, and the countersunk slot 123 is arranged in the frame area. In the width direction (X direction shown in Figures 3 to 6) or the length direction (Z direction shown in Figures 3 to 6), the thickness of the main body area gradually decreases from the center to the two ends (the thickness direction is the Y direction shown in Figures 3 to 6). For example, as shown in Figure 6, the outer plate surface of the main body area (the side of the main body area away from the inside of the plastic main shell 101) is a curved surface. With this arrangement, the heat sink 102 is thick near the heat source and gradually becomes thinner towards the edge. This is beneficial for the heat sink 102 to absorb enough heat from the heat source and quickly transfer it to the thinner surrounding areas, absorbing enough heat while dissipating heat quickly.

[0060] In some embodiments, as shown in Figures 4, 6, and 7, the heat sink 102 includes a base plate 121 and a plurality of fins 122 disposed on the base plate 121. The plurality of fins 122 are spaced apart and stand upright on the main body of the base plate 121 to improve heat dissipation efficiency. The thickness of the fins 122 (P shown in Figure 7) is no less than 1.5 mm to ensure rapid heat dissipation and improve heat dissipation efficiency. If the base plate 121 is thicker and the fins 122 are thinner, the fins 122 have a lower heat absorption capacity, making it difficult for heat to be transferred from the base plate 121 to the fins 122, which will affect the heat dissipation effect.

[0061] In some embodiments, the distance between two adjacent fins 122 (Q shown in FIG. 7 ) is not less than 4 mm to facilitate rapid heat dissipation of each fin 122 and prevent heat conduction between the fins 122 .

[0062] In some embodiments, as shown in FIG7 , the two heat dissipation surfaces of the fins 122 gradually converge as they move away from the base plate 121. The angle between the two heat dissipation surfaces is R, and 8° ≥ R ≥ 4°. Properly setting the angle between the two heat dissipation surfaces facilitates heat transfer from the base to the tip of the fins 122, compared to parallel heat dissipation surfaces. However, if the angle between the two heat dissipation surfaces is too large, the tip of the fins 122 will be too thin, unable to effectively absorb and store heat, and will also affect heat transfer from the base to the tip of the fins 122.

[0063] As shown in Figure 8, the plastic main housing 101 has a housing cavity and can be a box-shaped structure. The openings for laying heat sinks 102 can be located on the side walls and / or bottom wall. In a preferred embodiment, heat sinks 102 are provided on at least the side walls to quickly dissipate heat to the outside of the battery pack.

[0064] When the plastic main housing 101 and the heat sink 102 are integrally injection-molded, the plastic main housing 101 is provided with an open sidewall, such as a first sidewall 110. The first sidewall 110 includes a first wall plate, which includes a shell 111 extending along the circumference of the heat sink 102 and covering the edge of the inner wall of the heat sink 102, a column 112 connected to the shell 111, and an anti-slip boss 113 connected to the column 112. The column 112 is inserted into the hole of the countersunk slot 123, and the anti-slip boss 113 is filled in the slot of the countersunk slot 123.

[0065] As shown in FIG8 , in some embodiments, ribs 114 are provided on the bottom wall of the housing cavity of the plastic main housing 101. The ribs 114 may be arranged in a grid pattern to enhance the bottom strength and also support the battery module 2.

[0066] The present application also provides a battery pack, as shown in Figure 2 , comprising a cell module 2 and a packaging case as described in any of the above embodiments. This battery pack offers the advantages of light weight, high energy density, and excellent waterproof and dustproof properties, i.e., it possesses the beneficial effects of the packaging cases described in the above embodiments. The specific principles underlying these beneficial effects will not be elaborated upon here.

[0067] Furthermore, in some embodiments, a heat conductor 3 is provided inside the packaging shell. As shown in FIG13 , one side of the heat conductor 3 is in contact with the battery module 2, and the other side is in contact with the inner wall of the heat sink 102. With this arrangement, the heat conductor 3 quickly and efficiently transfers heat from the battery module 2 to the heat sink 102, which then dissipates the heat to the outside of the battery pack, effectively improving heat dissipation efficiency and performance. Furthermore, the heat conductor 3, located between the packaging shell and the battery module 2, also protects the battery module 2, preventing it from shaking and providing cushioning, shock absorption, and impact resistance.

[0068] The heat conducting member 3 may specifically include or be any one of a heat conducting silicone sheet, a graphite sheet, or a phase change member filled with a phase change material. Of course, it may also be a combination of any two or three. For example, two heat conducting members 3 may be provided, one being a heat conducting silicone sheet and the other being a graphite sheet, and so on. A full list of these is omitted here.

[0069] In some embodiments, flexible components may be provided on all three sides of the cell module 2, except for the side with the heat conductor 3. The bottom of the cell module 2 may also be provided with a flexible component, such as foam, silicone, or rubber. This is equivalent to wrapping the cell module 2 with a flexible component, improving its protection and preventing it from shaking, further providing cushioning, shock absorption, and impact resistance.

[0070] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0071] The components and devices involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the accompanying drawings. As will be appreciated by those skilled in the art, these components and devices can be connected, arranged, or configured in any manner. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0072] It should also be noted that in the devices and equipment of the present application, the components can be decomposed and / or reassembled, and such decompositions and / or reassemblies should be regarded as equivalent solutions of the present application.

[0073] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0074] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A packaging shell, characterized in that: The invention comprises a first shell and a second shell, wherein the first shell and the second shell are sealed and buckled together, and at least one of the first shell and the second shell comprises a plastic main shell and a heat sink, wherein the plastic main shell has a shell cavity for at least partially accommodating a battery core module, and at least one of the side walls or the bottom wall of the plastic main shell is provided with an opening, and the heat sink seals the opening and is connected to the plastic main shell as a whole.

2. The packaging shell according to claim 1, characterized in that: The heat sink is a metal sheet and is injection molded with the plastic main shell to form an integral structure.

3. The packaging shell according to claim 1 or 2, characterized in that: The heat sink is embedded in the groove on the plastic main shell; 4. The packaging shell according to claim 1 or 2, characterized in that: A portion of the plastic main shell is inserted into the heat sink and clamps the heat sink.

5. The packaging shell according to claim 3 or 4, characterized in that: The heat sink has a countersunk slot hole arranged along the thickness direction, the countersunk slot hole includes a through hole-shaped hole body and a slot body located at one axial end of the hole body, the slot body is located at a first side in the thickness direction of the heat sink, and a plurality of countersunk slot holes are arranged and distributed along the circumference of the heat sink; The plastic main shell includes a shell sheet located on the second side in the thickness direction of the heat sink and covering the hole, a column connected to the shell sheet and inserted into the hole, and an anti-slip boss connected to the column and stuck in the slot.

6. The packaging shell according to any one of claims 1 to 5, characterized in that: The heat sink comprises a bottom plate; wherein, The bottom plate includes a main body area and a frame area arranged around the main body area, and the thickness of the main body area gradually decreases from the center to both ends in the width direction or the length direction.

7. The packaging shell according to claim 6, characterized in that: The thickness of the bottom plate is not less than 1.2 mm.

8. The packaging shell according to any one of claims 1 to 7, characterized in that: The heat sink includes a bottom plate and a plurality of fins arranged on the bottom plate.

9. The packaging shell according to claim 8, characterized in that: The thickness of the fin is not less than 1.5 mm.

10. The packaging shell according to claim 8 or 9, characterized in that: The distance between two adjacent fins is not less than 4 mm.

11. The packaging shell according to any one of claims 8 to 10, characterized in that: The two heat dissipation surfaces of the fins gradually approach each other in a direction away from the bottom plate.

12. The packaging shell according to claim 11, characterized in that: The included angle between the two heat dissipation surfaces is R, and 8°≥R≥4°.

13. The packaging shell according to any one of claims 1 to 12, characterized in that: The inner wall of the heat sink is flush with the inner wall of the side wall of the plastic main shell where the opening is located.

14. The packaging shell according to any one of claims 1 to 13, characterized in that: The bottom wall of the shell cavity of the packaging shell is provided with ribs to enhance the strength of the bottom of the packaging shell.

15. The packaging shell according to any one of claims 1 to 14, characterized in that: The heat sink is made of one or more materials selected from metal sheets and graphite.

16. The packaging shell according to claim 15, characterized in that: The metal includes one or more of a single substance, an alloy or a composite material of aluminum and / or copper.

17. A battery pack, characterized in that: It comprises a battery cell module and a packaging shell as described in any one of claims 1 to 16.

18. The battery pack according to claim 17, wherein: A heat-conducting member is disposed inside the packaging shell, one side of the heat-conducting member is in contact with the battery core module, and the other side of the heat-conducting member is in contact with the inner wall of the heat sink.

19. The battery pack according to claim 18, characterized in that: The heat-conducting member includes any one or more of a heat-conducting silicone sheet, a graphite sheet, and a phase-change member filled with a phase-change material.

20. The battery pack according to any one of claims 17 to 19, characterized in that: A flexible member is provided between the battery core module and the area of ​​the packaging shell other than the area where the heat sink is provided.

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