Battery pack and battery pack

Abstract

The utility model provides a battery pack and battery pack wherein the battery pack comprises: a plurality of batteries arranged in a stacked manner, each battery has a housing, the side surface of the housing is provided with a plurality of protrusions extending along the side surface of the housing, and a predetermined distance is formed between the protrusions; wherein in two adjacent batteries, a first distance is formed between the bulges on at least one side of one battery, a second distance is formed between the bulges on at least one side of the other battery, and the first distance is greater than the second distance; the side portions, close to each other, of the two protrusions forming the first distance are in limiting fit with the side portions, away from each other, of the two protrusions forming the second distance. The battery pack provided by the utility model solves the problem of poor structural strength of the battery pack in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a battery pack and battery package. BACKGROUND

[0002] The battery of existing battery pack is usually connected together by the mode of glue bonding, and the mode is simple, but the bonding mode can result in low structural strength, so that the whole battery pack cannot satisfy the demand of high strength. UTILITY MODEL CONTENTS

[0003] The utility model discloses a battery pack and battery package, to solve the problem of the structural strength of the battery pack in prior art.

[0004] In order to realize the above-mentioned purpose, according to one aspect of the utility model, provide a kind of battery pack, comprising: multiple stacked arrangement batteries, battery has shell, the side of shell has multiple along the extension of the protrusion of side, and predetermined distance is formed between protrusion;Wherein, in two adjacent batteries, the first distance is formed between at least one side protrusion of one battery, the second distance is formed between at least one side protrusion of another battery, the first distance is greater than the second distance, and the side portion that is close to each other between the two protrusions of forming the first distance and the side portion that is far away from each other between the two protrusions of forming the second distance are respectively limited to cooperate.

[0005] Further, the end portion of the protrusion is located at the edge line of the opposite two ends of the shell respectively.

[0006] Further, the shell has opposite first side and second side, and the first side and the second side are provided with protrusions, and the extension directions of the protrusions of the first side and the second side are the same or are arranged at an angle.

[0007] Further, the shell has opposite first side and second side, and the first side and the second side are provided with protrusions, and the predetermined distance formed by the protrusions of the first side and the predetermined distance formed by the protrusions of the second side are the same, or the protrusions of the first side and the second side form the first distance and the second distance respectively.

[0008] Further, the protrusions of the limiting cooperation are in contact with each other.

[0009] Further, the battery pack further includes a connecting layer, and the connecting layer is located between the protrusions of the limiting cooperation and is sealingly connected with the protrusions of the limiting cooperation.

[0010] Further, the difference between the first distance and the second distance is 1-6mm.

[0011] Further, the protrusion is in arc structure, and the height of the protrusion protruding from the side of the shell and / or the distance between the two sides parallel to the length direction of the protrusion is 1-3mm.

[0012] Further, the battery pack further comprises a buffer, the buffer is arranged between the shells of the two adjacent batteries and located between the plurality of protrusions.

[0013] According to another aspect of the present application, a battery pack is provided, comprising an end plate and the above-mentioned battery pack, the end plate has an end plate protrusion for limiting cooperation with the protrusion.

[0014] According to the technical scheme of the present application, the present embodiment is provided with a plurality of protrusions on the surface of the shell, and the predetermined distance between the protrusions is utilized, on the one hand, the protrusions are utilized to strengthen the strength of the shell, ensuring the structural strength of the battery pack as a whole, on the other hand, the protrusions are utilized to realize positioning butt joint through the cooperation between the protrusions of the two batteries when the two batteries are stacked and butt jointed, ensuring the accuracy of stacking and being beneficial to improving the structural strength after grouping. Specifically, a first distance is formed between the protrusions of at least one side of one of the two adjacent batteries in the battery pack, while a second distance is formed between the protrusions of at least one side of the other battery, and the first distance is greater than the second distance. The design of different distances makes the two protrusions forming the second distance located between the two protrusions forming the first distance when the two batteries are stacked and assembled, and the protrusions are limited and cooperated, thereby realizing the accurate cooperation between the two batteries. On the one hand, the stable contact and fixation between the batteries are ensured through the limiting cooperation between the protrusions, the risk of damage when subjected to external impact is reduced, and the overall structural strength of the battery pack is improved; on the other hand, the structural strength of the shell itself is improved through the form of the protrusions, thereby being beneficial to improving the overall structural strength. At the same time, through the setting of the protrusions, not only the direct contact area between the batteries can be reduced, thereby improving the heat dissipation efficiency, but also uniform assembly between different battery sizes can be realized, thereby realizing better heat dissipation effect and meeting the needs of different battery sizes. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 A structural schematic view of a battery of the battery pack of the embodiment one of the present application is shown;

[0017] Figure 2 A front sectional view of the battery pack of the embodiment one of the present application is shown; Figure 1

[0018] Figure 3 A structural schematic view of a battery of the battery pack of the embodiment one of the present application is shown;

[0019] ​Figure 4 a bottom view of the battery pack of the utility model embodiment two is shown in the figure; Figure 3

[0020] Figure 5 a structure schematic view of the battery of the battery pack of the utility model embodiment two is shown in the figure;

[0021] Figure 6 a bottom view of the battery pack of the utility model embodiment two is shown in the figure; Figure 5

[0022] Figure 7 a structure schematic view of the battery pack of the utility model embodiment two is shown in the figure;

[0023] Figure 8 a bottom view of the battery pack of the utility model embodiment two is shown in the figure; Figure 7

[0024] Figure 9 a bottom view of the battery pack of the utility model embodiment four is shown in the figure.

[0025] Among them, the above drawing includes the following figure marks:

[0026] 10, first battery;11, first shell;20, second battery;21, second shell;30, third battery;31, third shell;40, protrusion;50, buffer. DETAILED DESCRIPTION

[0027] It needs to be explained that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0028] It needs to be pointed out that, unless otherwise indicated, all technical and scientific terms used in the application have the same meaning as that generally understood by the ordinary skilled person in the technical field to which the application belongs.

[0029] In the utility model, the orientation words such as "upper, lower, top, bottom" used without making the opposite statement are generally for the direction shown in the drawing, or for the component itself in the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0030] In order to solve the problem of poor structural strength of the battery pack in the prior art, the utility model provides a battery pack and a battery pack.

[0031] Embodiment one

[0032] As Figures 1 to 4 ​​​The battery pack shown comprises: a plurality of stacked batteries, the battery having a shell, the side of the shell having a plurality of protrusions 40 extending along the side of the shell, the protrusions 40 forming a predetermined distance therebetween; wherein, in the two adjacent batteries, the first distance is formed between the protrusions 40 on at least one side of one of the batteries, and the second distance is formed between the protrusions 40 on at least one side of the other battery, the first distance being greater than the second distance, and the sides of the two protrusions 40 forming the first distance approaching each other are respectively limited and matched with the sides of the two protrusions 40 forming the second distance moving away from each other.

[0033] The present embodiment sets a plurality of protrusions 40 on the surface of the shell, and utilizes the predetermined distance formed between the protrusions 40, on one hand, the protrusions 40 achieve the effect of strengthening the strength of the shell, ensuring the structural strength of the battery pack as a whole, on the other hand, the protrusions 40 enable the positioning and docking of the two batteries when they are stacked and docked by the cooperation between the protrusions 40 of the two batteries, ensuring the accuracy of the stacking, and also facilitating the improvement of the structural strength after grouping. Specifically, the first distance is formed between the protrusions 40 on at least one side of one of the two adjacent batteries constituting the battery pack, and the second distance is formed between the protrusions 40 on at least one side of the other battery, and the first distance is greater than the second distance. This design of different distances enables the two batteries to be stacked and assembled, with the two protrusions 40 forming the second distance being located between the two protrusions 40 forming the first distance, and the protrusions 40 being limited and matched, thereby achieving accurate cooperation between the two batteries. On one hand, the above setting ensures stable contact and fixation between the batteries through the limited cooperation between the protrusions 40, reduces the risk of damage when subjected to external impact, and improves the overall structural strength of the battery pack; on the other hand, the form of the protrusions 40 improves the structural strength of the shell itself, thereby also facilitating the improvement of the overall structural strength. At the same time, by setting the protrusions 40, not only can the direct contact area between the batteries be reduced, thereby improving the heat dissipation efficiency, but also uniform assembly between different battery sizes can be achieved, thereby achieving better heat dissipation effect and meeting the needs of different battery sizes.

[0034] As Figure 1 and Figure 2As shown, in this embodiment, the protrusions 40 extend along the side surface of the shell for a predetermined length, and the end portions at both ends of the protrusions 40 are located at the edge lines at the opposite ends of the shell, that is, the protrusions 40 of this embodiment extend from one end of the side surface of the shell to the other end of the side surface, that is, the protrusions 40 extend from the top surface of the shell to the bottom surface of the shell, that is, the protrusions 40 cover the entire side surface in the extension direction, so that the protrusions 40 provide additional support and reinforcement for the shell, further improve the effect of strengthening the structural strength, and significantly improve the compression resistance and impact resistance of the shell. When the battery pack is subjected to external force, the protrusions 40 can absorb and disperse stress, reduce the pressure directly acting on the shell, avoid deformation or damage of the shell, thereby protecting the internal structure of the battery, and improving the overall stability and durability of the battery pack. Of course, the protrusions 40 can also be arranged only in the middle region or other partial region of the side surface.

[0035] The protrusions 40 of the limiting fit of this embodiment adopt the form of abutting contact with each other, that is, the two protrusions 40 directly contact each other, so as to ensure the accuracy and reliability of the positioning fit.

[0036] For the sake of subsequent description, this embodiment takes the battery as an example including a first battery 10 and a second battery 20, the first battery 10 and the second battery 20 are stacked, and correspondingly, the shell of the first battery 10 is a first shell 11, the shell of the second battery 20 is a second shell 21, and the protrusions 40 are arranged on the opposite side surfaces of the first shell 11 and the second shell 21. The first distance and the second distance are both one of the predetermined distances.

[0037] As shown in Figure 3 and Figure 4 As shown, in this embodiment, the shell has opposite first and second sides, and the first and second sides both have protrusions 40, and the protrusions 40 of the first side and the protrusions 40 of the second side have the same extension direction. That is, the first shell 11 and the second shell 21 both have a first side and an opposite second side, and a plurality of protrusions 40 are arranged on the first side and the second side, and all the protrusions 40 have a parallel relationship whether on the first side or the second side. In this way, the structure is more uniform, and the processing is more convenient and fast. Of course, the protrusions 40 on the same side can also adopt an inclined manner forming a certain angle.

[0038] As shown in Figure 4As shown, in the present embodiment, the first side protrusions 40 form the same predetermined distance on the shell of the same battery as the second side protrusions 40. That is, the first distance is formed between the two groups of protrusions 40 on both sides of the first shell 11, and the second distance is formed between the two groups of protrusions 40 on both sides of the second shell 21, so that the overall structure of a single shell is symmetrical on both sides. Such a form makes it unnecessary to distinguish the front and back directions when the two batteries are stacked and assembled, that is, the first side of the first battery 10 and the second side of the second battery 20 can be assembled together, so that the assembly mode of the two batteries is to align the larger area side of the two batteries and directly abut together, which simplifies the assembly process of the battery pack, ensures simple and reliable assembly between the batteries, and also facilitates the production and molding of the protrusions 40, improves production efficiency and cost-effectiveness.

[0039] All protrusions 40 of the present embodiment adopt a longitudinal extension form, the top end extends to the top surface of the battery, and the bottom end extends to the bottom surface of the battery, so that the protrusions 40 cover the entire height of the upper and lower surfaces of the shell side.

[0040] Alternatively, the specific number of protrusions 40 on the first side and the second side can be set as needed, and two or more can be set. The present embodiment only provides two protrusions 40 on the side of the shell, which makes the structure more simple while improving the structural strength. Similarly, the positional relationship between the protrusions 40 on both sides of the shell can be symmetrical distribution or asymmetrical distribution. As long as the protrusions 40 on the first side and the protrusions 40 on the second side form a first distance of the same size.

[0041] In the embodiment, the difference between the first distance and the second distance is 1-6mm. In this way, when the first battery 10 and the second battery 20 are stacked and assembled, the first side of the first battery 10 and the second side of the second battery 20 can be more stably butted and limited together, which not only improves the convenience of assembly and reduces the accuracy requirement of alignment, but also ensures the reliability of positioning and limiting after assembly, avoiding large misalignment. In this way, the difference between the first distance and the second distance is set, specifically, the first distance between the protrusions 40 on the first side is accurately calculated, and on the second side, the second distance between the protrusions 40 is 1-6mm different from the first distance. In this way, the protrusions 40 forming the first distance and the protrusions 40 forming the second distance abut each other at a position close to each other rather than being too far apart. The difference between the first distance and the second distance between the protrusions 40 not only forms a direct contact limiting form, but also forms a non-direct contact limiting form, so that the battery has better fault tolerance and compatibility during assembly and cooperation; on the other hand, the battery shell can more effectively disperse and absorb stress when subjected to external force or vibration, reducing the deformation of the shell and improving the compression resistance and impact resistance of the battery pack when subjected to external force. At the same time, the misaligned limiting structure can also prevent the battery from moving greatly within the group, improving the overall structural stability of the group.

[0042] As shown in Figure 2 and Figure 4 In the embodiment, the protrusions 40 have an arc-shaped structure. The arc-shaped structure not only has an aesthetic appearance, but more importantly, it can reduce stress concentration and improve the structural strength of the shell. When subjected to external force, the arc-shaped structure of the protrusions 40 can better disperse the force and reduce the risk of local deformation, thereby avoiding damage to the battery structure.

[0043] Optionally, the height of the protrusions 40 protruding from the side of the shell is 1-3mm, i.e. the distance from the top of the arc-shaped protrusions 40 to the side of the battery is 1-3mm. In this way, after two adjacent batteries are assembled and cooperated through the protrusions 40, the adjacent batteries are naturally supported to a certain height in the arc height direction, providing an effective heat dissipation channel for the battery. The space between the protrusions 40 allows air to circulate, which helps to reduce the heat generated by the battery during operation and improve heat dissipation efficiency. By controlling the size and height of the protrusions 40, the air circulation path can be further optimized, heat conduction can be reduced, and the temperature of the battery can be reduced, thereby prolonging the service life of the battery and improving the stability of the battery performance. When the working temperature is high and better heat dissipation effect is required, a height close to 3mm can be selected to ensure a wider heat dissipation channel, and the air circulation between the protrusions 40 is larger, thereby achieving higher heat dissipation effect. Of course, a smaller height value close to 1mm can also be selected to reduce the material cost while meeting the requirement of heat dissipation intensity.

[0044] Optionally, the distance between the two sides of the protrusion 40 parallel to the length direction is 1-3 mm. That is, the distance between the protrusion 40 and the side of the battery, that is, the width of the protrusion 40 is 1-3 mm, so that the protrusion 40 and the side of the battery form a stable connection, significantly improving the structural strength and impact resistance of the battery shell. Because the wider protrusion 40 has higher design strength, when greater shell structural strength is required, a width close to 3 mm can be used, and when greater shell structural strength is not required, a smaller width close to 1 mm can be selected.

[0045] Optionally, the height and width of the protrusion 40 can be set to a distance of 1-3 mm, or only one of the height or width can be set to a distance of 1-3 mm. The specific 1-3 mm value can be set according to actual use requirements to achieve the best balance point between heat dissipation, structural strength, and lightweight, ensuring that the compression and impact resistance of the shell are enhanced, the battery heat dissipation performance is maintained, and the lightweight design requirement of the battery is ensured.

[0046] The embodiment also provides a battery pack, which includes a box body, an end plate, and the battery pack described above. The battery pack can be provided with one or more groups, and the battery pack is arranged in the box body. The side of the end plate facing the battery pack has an end plate protrusion for limiting cooperation with the protrusion 40. The structure of the end plate protrusion can be set in a corresponding manner with reference to the protrusion 40 of the battery pack, as long as cooperation and installation can be ensured.

[0047] It should be noted that the side of the shell generally has two larger sides and two smaller sides. The protrusion 40 of the embodiment is arranged on the larger sides, that is, the first side and the second side are the two larger sides of the shell, thereby satisfying the general assembly mode of the stacked batteries. Of course, when the assembly form between the batteries changes, the first side and the second side can also be arranged as the two smaller sides.

[0048] Embodiment Two

[0049] The difference from the first embodiment is that the forms of the protrusions 40 on the two sides of the same shell are different.

[0050] As shown in Figures 5 to 8 The shell of the embodiment has opposite first and second sides, and the first and second sides both have protrusions 40. However, the protrusions 40 on the first side and the protrusions 40 on the second side are not arranged in parallel, but are arranged at an angle. That is, the extension direction of the protrusions 40 on the first side is inconsistent with the extension direction of the protrusions 40 on the second side. By arranging the protrusions 40 at an angle, when the battery is subjected to external force, this design can more effectively disperse and absorb stress and reduce the risk of deformation of the shell.

[0051] Specifically, the protrusions 40 on the first side and the protrusions 40 on the second side, which form an angle, have different directions of extension and therefore different directions of force bearing. When the battery is subjected to external force, they can support each other. On the one hand, this can form a reinforcement effect similar to a frame structure, thereby significantly improving the structural stability of the entire battery. On the other hand, it can also improve the assembly precision of the battery in the battery pack, so that the interaction between adjacent batteries forms precise limits to restrict the longitudinal and lateral displacement between adjacent batteries. This ensures the stability of the battery's position in the battery pack during use or assembly, and improves the overall performance and lifespan of the battery pack.

[0052] In this embodiment, the protrusion 40 on the first side and the protrusion 40 on the second side are arranged vertically. Of course, other angles can also be used.

[0053] like Figure 8 As shown, taking the first battery 10, the second battery 20, and the additional third battery 30 in Embodiment 1 as an example, the third battery 30 is essentially the same as the first battery 10. The first outer casing 11 of the first battery 10, the second outer casing 21 of the second battery 20, and the third outer casing 31 of the third battery 30 all have two longitudinally extending protrusions 40 on their first sides, and two laterally extending protrusions 40 on their second sides. Thus, when the first battery 10, the second battery 20, and the third battery 30 are stacked sequentially, the first side of the first outer casing 11 needs to be aligned with the first side of the second outer casing 21, so that the longitudinal protrusions 40 mutually limit and cooperate. Similarly, the second side of the second outer casing 21 needs to be aligned with the second side of the third outer casing 31, so that the laterally extending protrusions 40 mutually limit and cooperate. This process is repeated to achieve the stacking and positioning assembly of multiple batteries. Compared with Embodiment 1, the battery in this embodiment has higher structural strength, but the front and back sides need to be considered during assembly, and specific sides need to be aligned before assembly, which makes the assembly slightly more complicated.

[0054] Example 3

[0055] The difference from Embodiment 1 is that the protrusions 40 on both sides of the same outer shell are different.

[0056] The housing of the present embodiment still has opposite first and second sides, and the first and second sides both have protrusions 40, but the protrusions 40 of the first side and the protrusions 40 of the second side of the present embodiment do not form a predetermined distance of the same size, but form a first distance and a second distance respectively. In this way, for the batteries, each battery has a first distance between the protrusions 40 of the first side and a second distance between the protrusions 40 of the second side, so that the structure of each battery is the same, and additional production lines or shutdown adjustment of processing parameters are not required during processing, thereby helping to reduce the complexity of processing and thus reducing the processing cost.

[0057] Similarly, taking the first battery 10 and the second battery 20 in Embodiment One plus an additional third battery 30 as an example, the third battery 30 is essentially the same as the first battery 10. The three batteries have the same structure, and all have a first distance between the protrusions 40 of the first side and a second distance between the protrusions 40 of the second side. During assembly, the first side of the first housing 11 is aligned with the second side of the second housing 21, so that the protrusions 40 of the first distance and the protrusions 40 of the second distance are limited and matched with each other, and the first side of the second housing 21 is aligned with the second side of the third housing 31, so that the protrusions 40 of the first distance and the protrusions 40 of the second distance are also limited and matched with each other. In this way, the positioning and assembly of multiple batteries are achieved. Compared with Embodiment One, the batteries of the present embodiment are simpler in processing, but the front and back directions of the side faces need to be considered during assembly, and the assembly can only be performed by aligning the specific side faces, so the assembly is slightly more complex.

[0058] Embodiment Four

[0059] The difference from Embodiment One is that the battery pack of the present embodiment further comprises a buffer 50.

[0060] As shown in Figure 9 In the present embodiment, the battery pack further comprises a buffer 50, which can adopt a structure such as a buffer pad. The buffer 50 is arranged between the housings of two adjacent batteries and located between the protrusions 40. Specifically, when the two batteries are assembled on top of each other, the side faces of the two batteries and the protrusions 40 together form an accommodation area, and the buffer 50 is arranged in the accommodation area. The buffer 50 can be connected to the side faces of the batteries by adhesion or the like. In this way, since the material of the buffer 50 has good elasticity, wear resistance and heat resistance, the installation of the buffer 50 between the two batteries can effectively absorb energy when the battery is subjected to vibration or impact, reduce direct contact between the batteries, prevent relative movement between the batteries, and thus protect the integrity and functionality of the batteries.

[0061] Preferably, the buffer 50 of the embodiment is spaced apart from the protrusions 40, so that the buffer 50 is arranged in the accommodating area in a manner of not completely filling the accommodating area. In this way, compared with the conventional large-area buffer pad, the use amount of material is greatly reduced, the production cost is reduced, and more importantly, the direct contact area between the batteries is greatly reduced, the size of the remaining gap is increased, air flow is facilitated, an effective heat dissipation path is formed, heat generated by the batteries can be dissipated more quickly, the temperature of the batteries is reduced, the service life of the batteries is prolonged, and the stability of the battery performance is improved. The specific shape and size of the buffer 50 can be set according to actual use requirements, as long as the above functions are met.

[0062] Embodiment five

[0063] The difference from the first embodiment is that the cooperation form between the protrusions 40 in the embodiment is different.

[0064] In the embodiment, the protrusions 40 in limiting cooperation do not directly contact and abut each other, but a connecting layer is arranged therebetween. Specifically, the battery pack further comprises a connecting layer, which can adopt a structure form such as an adhesive layer. The connecting layer is located between the protrusions 40 in limiting cooperation, so that the connecting layer is sealingly connected with the protrusions 40 in limiting cooperation, so that the protrusions 40 in limiting cooperation can realize limiting cooperation and sealing connection.

[0065] It should be noted that the plurality of in the above embodiments means at least two.

[0066] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0067] 1. The problem of poor structural strength of the battery pack in the prior art is solved;

[0068] 2. The stable contact and fixation between the batteries are ensured by the abutting limiting cooperation between the protrusions, the risk of damage when subjected to external impact is reduced, and the overall structural strength of the battery pack is improved;

[0069] 3. The structural strength of the shell itself is improved by the protrusions, thereby also being conducive to improving the overall structural strength;

[0070] 4. The direct contact area between the batteries is reduced, thereby improving the heat dissipation efficiency, and uniform assembly between different battery sizes can be realized, thereby realizing better heat dissipation effect and meeting the needs of different battery sizes.

[0071] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0072] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0073] It should be noted that the terms "first", "second", and the like, used in the specification and the claims of the application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0074] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery pack characterized by comprising: The battery pack comprises: a plurality of stacked batteries, each battery having a shell, the shell having a plurality of protrusions (40) extending along the side of the shell, the protrusions (40) defining a predetermined distance therebetween; wherein, in adjacent two of the batteries, at least one side of one of the batteries has a first distance defined between the protrusions (40), and at least one side of the other of the batteries has a second distance defined between the protrusions (40), the first distance being greater than the second distance, and the sides of the two protrusions (40) defining the first distance being in close proximity to each other and the sides of the two protrusions (40) defining the second distance being in far away from each other, respectively.

2. The battery pack of claim 1, wherein, The ends of the protrusions (40) are located at the edge lines of the opposite ends of the shell, respectively.

3. The battery pack of claim 1, wherein, The shell has opposite first and second sides, each of the first and second sides having the protrusions (40), and the protrusions (40) of the first side being arranged in the same direction as or at an angle to the protrusions (40) of the second side.

4. The battery pack of claim 1, wherein, The shell has opposite first and second sides, each of the first and second sides having the protrusions (40), the protrusions (40) of the first side defining the same predetermined distance as the protrusions (40) of the second side, or the protrusions (40) of the first side and the protrusions (40) of the second side defining the first distance and the second distance, respectively.

5. The battery pack of claim 1, wherein, The protrusions (40) in close proximity to each other are in abutting contact.

6. The battery pack of claim 1, wherein, The battery pack further comprises a connecting layer located between the protrusions (40) in close proximity to each other and sealedly connected to the protrusions (40) in close proximity to each other.

7. The battery pack of claim 1, wherein, The difference between the first distance and the second distance is 1-6 mm.

8. The battery pack of claim 1, wherein, The protrusions (40) have an arc-shaped structure, the protrusions (40) protruding from the side of the shell by a height of 1-3 mm and / or a distance between the two sides of the protrusions (40) parallel to the length direction is 1-3 mm.

9. The battery pack of claim 1, wherein, The battery pack further comprises a buffer (50) arranged between the shells of adjacent two of the batteries and located between the protrusions (40).

10. A battery pack, characterized by, The battery pack comprises an end plate and the battery pack of any one of claims 1-9, the end plate having end plate protrusions for limiting the protrusions (40).

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