Battery module housing, battery module, and battery pack

Abstract

The utility model discloses battery module shell, battery module and battery package belong to battery technical field, and the utility model discloses battery module shell processing efficiency and assembly efficiency are all lower etc. the problem of existing battery module shell is designed to solve. The utility model discloses battery module shell includes: shell frame, including at least two side plates, all side plates are connected to form the accommodation space for accommodating the electric core, and the accommodation space includes the first opening and the second opening of opposite setting, the cover body is partially covered in the first opening, and the cover body is used for fixed connection with the electric core, and the insulating film is connected to the cover body, and the insulating film can cover the part of the first opening not covered by the cover body. The utility model discloses battery module shell, battery module and battery package are composed of multiple structures that are independent of each other, and the processing efficiency is high, is convenient for assembling, reduces the manufacturing cost of battery module, and the use experience is good. The bottom cover of the existing battery module shell is removed, and the system energy density is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to battery module housing, battery module and battery pack. Background Technology

[0002] To enhance the market competitiveness of electric vehicles, the requirements for the cost and energy density of electric vehicle components are becoming increasingly stringent. Among these, the power battery, as a crucial component of electric vehicles, accounts for a significant percentage of the overall vehicle cost, making it imperative to reduce costs, improve processing efficiency, and increase system energy density.

[0003] Existing power batteries mainly consist of battery module housings, which in turn mainly consist of battery cells and outer shells. The outer shell is composed of six plates, which cover the top, bottom, and four sides of the battery cells, respectively, and tightly enclose the battery cells within the shell.

[0004] The shortcomings of existing battery module housings include: low processing and assembly efficiency, large weight, high cost, and low system energy density. Utility Model Content

[0005] The purpose of this utility model is to propose a battery module housing, a battery module and a battery pack, which solves the problem of low processing efficiency and assembly efficiency of existing battery module housings, and provides a better user experience.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery module housing includes: a housing frame including at least two side plates connected to form an accommodating space for accommodating a battery cell, the accommodating space including a first opening and a second opening disposed opposite to each other; a cover partially covering the first opening, the cover being fixedly connected to the battery cell; and an insulating film connected to the cover, the insulating film being capable of covering the portion of the first opening not covered by the cover.

[0008] In one preferred embodiment, the housing frame includes two first side plates and two second side plates arranged opposite each other, the first side plates and the second side plates being alternately connected in sequence and enclosing a receiving space; the cover includes a top cover plate, the two ends of the top cover plate being connected to the two second side plates respectively, and a first gap existing between the top cover plate and the first side plates such that the top cover plate partially covers the first opening; the side wall of the top cover plate near the second side plates is used for fixed connection with the battery cell; the two ends of the insulating film are connected to the top cover plate and the first side plates respectively and cover the portion of the first opening not covered by the top cover plate.

[0009] In one preferred embodiment, along the direction in which the two first side plates are spaced apart, the first side plates are spaced apart from the top cover plate to form a first gap; and / or, along the covering direction of the top cover plate, the first side plates are spaced apart from the top cover plate to form a second gap, and the insulating film covers the second gap; and / or, at the second opening, the first side plate is recessed into the second side plate to form a venting slit, the battery cell is spaced apart from the first side plate to form a third gap, and the venting slit allows adhesive to fill the third gap through the venting slit.

[0010] In one preferred embodiment, the second side plate includes a convex-shaped second side plate body and a second side plate edge extending perpendicularly to the second side plate body; a connecting through hole is formed on the side of the second side plate edge near the first side plate, and a first side plate through hole is formed on the first side plate near the second side plate edge; the connecting through hole and the first side plate through hole are connected by a connector; and / or, the second side plate includes a convex-shaped second side plate body and a second side plate edge extending perpendicularly to the second side plate body, a connecting through hole is formed on the side of the second side plate edge near the cover, and a cover plate through hole is formed on the side of the cover near the second side plate edge; the connecting through hole and the cover plate through hole are connected by a connector.

[0011] In one preferred embodiment, at least two lifting holes are provided on the side of the second side plate near the top cover plate, and all the connecting through holes provided on the side of the second side plate near the top cover plate are located between the two lifting holes.

[0012] In one preferred embodiment, the housing frame is made of a non-metallic material; and / or, the cover is made of a non-metallic material.

[0013] On the other hand, the present invention adopts the following technical solution:

[0014] A battery module includes a battery cell and a battery module housing. The battery cell is disposed within the accommodating space of the housing frame and is fixedly connected to the cover.

[0015] Furthermore, the present invention adopts the following technical solution:

[0016] The battery pack includes a lower housing and the battery module described above. The battery module is disposed within the accommodating space of the lower housing and is fixedly connected to the lower housing.

[0017] In one preferred embodiment, the inner bottom wall of the lower housing is provided with an adhesive layer, and the battery module is fixedly connected to the inner bottom wall of the lower housing through the adhesive layer.

[0018] In one preferred embodiment, the battery module's housing frame includes two opposing first side plates and two opposing second side plates, which are sequentially and alternately connected to form an accommodating space; at a second opening, the first side plate is recessed into the second side plate to form a venting slit, and the battery cell is spaced apart from the first side plate to form a third gap, the venting slit allowing adhesive to fill the third gap; and / or, the lower housing includes at least one adhesive-limiting strip, which is fixedly connected to the inner bottom wall of the lower housing, and a fourth gap exists between the adhesive-limiting strip and the inner side wall of the lower housing, the adhesive layer is disposed at the fourth gap and fixedly connected to the battery module; and / or, the lower housing includes at least two adhesive-limiting strips, which are spaced apart to form a fifth gap, the adhesive-limiting strips are fixedly connected to the inner bottom wall of the lower housing, the adhesive layer is disposed at the fifth gap and fixedly connected to the battery module.

[0019] The battery module housing disclosed in this utility model is composed of multiple independent structures, which has high processing efficiency, is easy to assemble, and provides a good user experience; it eliminates the bottom cover of existing battery module housings, reduces weight, increases system energy density, and reduces costs.

[0020] The battery module disclosed in this utility model includes the aforementioned battery module housing. By improving the processing and assembly efficiency of the battery module housing, the processing and assembly efficiency of the battery module is improved, the manufacturing cost of the battery module is reduced, and the user experience is better.

[0021] The battery pack disclosed in this utility model includes the aforementioned battery module, which has high processing efficiency, high assembly efficiency, and low cost. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the battery pack provided in a specific embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the battery module provided in a specific embodiment of this utility model;

[0024] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0025] Figure 4 This is an exploded view of the battery module provided in a specific embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the second side plate provided in a specific embodiment of the present utility model;

[0027] Figure 6 This is a partial structural schematic diagram of the top cover plate provided in a specific embodiment of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the first side plate provided in a specific embodiment of the present utility model;

[0029] Figure 8 yes Figure 7 A magnified view of a section at point B in the middle.

[0030] In the picture:

[0031] 1. Battery cell; 2. Housing frame; 3. Top cover plate; 4. Insulating film; 21. First side plate; 22. Second side plate; 31. Cover plate through hole; 100. Battery module housing; 200. Lower housing; 201. Adhesive strip; 211. First side plate through hole; 221. Second side plate body; 222. Second side plate edge; 223. Connection through hole; 224. Lifting hole. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] This embodiment discloses a battery module housing, a battery module, and a battery pack, such as Figure 1 As shown, the battery pack includes a lower housing 200 and a battery module. The battery module is disposed within the accommodating space of the lower housing 200 and is fixedly connected to the lower housing 200.

[0039] like Figures 2 to 4 As shown, the battery module includes a battery cell 1 and a battery module housing 100. The battery module housing includes a housing frame 2, a cover, and an insulating film 4. The battery cell 1 is disposed within the accommodating space of the housing frame 2, and the battery cell 1 is fixedly connected to the cover. The battery cell 1 (i.e., a single battery cell) can be a pouch cell or a prismatic cell; the battery cell 1 can be a liquid battery, a semi-solid battery, a solid battery, etc.

[0040] The housing frame 2 includes at least two side plates, all of which are connected to form an accommodating space for accommodating the battery cell 1. The accommodating space includes a first opening and a second opening disposed opposite to each other, and a cover is partially disposed over the first opening for fixed connection with the battery cell 1. An insulating film 4 is connected to the cover and covers the portion of the first opening not covered by the cover.

[0041] The battery module housing is composed of multiple independent structures, which is highly efficient in processing, easy to assemble, and provides a good user experience. It eliminates the bottom cover of the existing battery module housing, reduces weight, increases system energy density, and lowers costs.

[0042] The specific structure of the housing frame 2 is not limited. In this embodiment, the housing frame 2 includes two first side plates 21 and two second side plates 22 arranged opposite to each other. The first side plates 21 and the second side plates 22 are alternately connected and enclosed to form an accommodating space. The cover includes a top cover plate 3. The two ends of the top cover plate 3 are respectively connected to the two second side plates 22, and there is a first gap between the top cover plate and the first side plates 21 so that the top cover plate partially covers the first opening. The side wall of the top cover plate 3 near the second side plates 22 is used for fixed connection with the battery cell 1. The two ends of the insulating film 4 are respectively connected to the top cover plate 3 and the first side plates 21 and cover the part of the first opening not covered by the top cover plate 3.

[0043] The purpose of having a "first gap between the top cover and the first side plate 21" is to reduce the size and weight of the top cover, achieving a lightweight design for the battery module and reducing costs. It is understood that the first gap cannot remain continuously open. In this embodiment, the two ends of the insulating film 4 are connected to the top cover 3 and the first side plate 21 respectively, thereby covering the portion of the first opening not covered by the top cover 3, achieving partial sealing and insulation of the first gap. It is also understood that, to achieve lightweighting and low cost, a first gap can be formed between the top cover and the second side plate 22, or the top cover can have a first gap both with the first side plate 21 and the second side plate 22, and then the first opening can be sealed and insulated by sealing with an insulating film.

[0044] Along the direction in which the two first side plates 21 are spaced apart, the first side plates 21 and the top cover plate 3 are spaced apart to form a first gap. Along the covering direction of the top cover plate 3, the first side plates 21 and the top cover plate 3 are spaced apart to form a second gap. The insulating film 4 covers the second gap, protecting the battery cell 1. The formation of the first gap and the second gap between the first side plates 21 and the top cover plate 3, covered by the lightweight insulating film 4, not only ensures that the gaps are sealed and insulated, but also reduces the overall weight and manufacturing cost, which is beneficial for the lightweight design of the battery module.

[0045] An adhesive layer is provided on the inner bottom wall of the lower housing 200, and the battery module is fixedly connected to the inner bottom wall of the lower housing 200 through the adhesive layer. During battery pack assembly, a large amount of adhesive is laid on the lower housing 200. When the battery module is installed on the top surface of the adhesive-limiting strip 201, excess adhesive is squeezed and flows outwards. In order to allow the adhesive to flow smoothly, in this embodiment, at the second opening, the first side plate 21 is recessed into the second side plate 22 to form a drainage slit with a height of h. The adhesive can flow into the interior of the battery module housing 100 through the drainage slit, which facilitates installation. Specifically, the battery cell 1 can be spaced apart from the first side plate 21 to form a third gap. The drainage slit allows the adhesive to fill the third gap through the drainage slit. The specific value of the height h of the drainage slit is not limited and can be determined according to actual usage requirements.

[0046] like Figure 4 and Figure 5 As shown, the second side plate 22 includes a convex-shaped second side plate body 221 and a second side plate edge 222 extending perpendicularly to the second side plate body 221. The specific extension direction of the second side plate edge 222 is not limited; it can extend towards the battery cell 1 or away from the battery cell 1, depending on the structure of the battery cell 1 and the second side plate body 221, as long as it is conducive to assembling the battery module.

[0047] During battery pack assembly, a large amount of adhesive flows outwards under the pressure of the battery module housing 100. When the edge 222 of the second side plate extends away from the cell 1, a groove is formed between the main body 221 of the second side plate and the edge 222 of the second side plate. Some of the adhesive fills the groove structure, achieving full coverage and bonding of the battery module housing 100 with adhesive. This replaces the existing structure that fixes the battery module housing to the lower housing of the battery pack through the module mounting point. The overall structure of the battery module is stronger, and its load-bearing and fixing capacity for the cell 1 is also stronger.

[0048] The specific connection structure of the shell frame 2 is not limited. In this embodiment, for example... Figure 5 , Figure 7 and Figure 8 As shown, a connecting through hole 223 is provided on the side of the second side plate 222 near the first side plate 21, and a first side plate through hole 211 is provided on the side of the first side plate 21 near the second side plate 222. The connecting through hole 223 and the first side plate through hole 211 are connected by rivets and other connectors. The structure is simple and reasonable, easy to disassemble and assemble, and has high assembly efficiency.

[0049] like Figure 5 and Figure 6As shown, a connecting through hole 223 is provided on the side of the second side plate edge 222 near the cover body, and at least two cover plate through holes 31 are provided on the side of the cover body near the second side plate edge 222. The connecting through hole 223 and the cover plate through hole 31 are connected by rivets or other connectors.

[0050] Based on the above structure, at least two lifting holes 224 are provided on the side of the second side plate edge 222 near the top cover plate 3. All the connecting through holes 223 on the side of the second side plate edge 222 near the top cover plate 3 are located between the two lifting holes 224. During battery pack assembly, the battery module housing 100 is lifted into the lower housing 200 through the lifting holes 224, making disassembly and assembly more convenient and labor-saving.

[0051] The housing frame 2 is made of non-metallic material, and / or the cover is made of non-metallic material. Moreover, the bottom plate of the existing module has been eliminated, and the housing wrapped around the cell 1 is no longer fully enclosed. Compared with the fully enclosed metal shell in the prior art, the battery module housing 100 in this embodiment has lower cost, lighter weight, higher system energy density, and is easier to process and assemble.

[0052] The specific materials used to prepare the shell frame 2 and the cover are not limited. In this embodiment, the shell frame 2 and the cover are made of epoxy fiberglass board (or epoxy glass fiber board) or PET (Polyethylene terephthalate, abbreviated as polyester) plastic steel strip, which is low in cost, light in weight, high in strength and long in service life.

[0053] Based on the above structure, the top cover plate 3 is bonded to the top surface of the battery cell 1 using structural adhesive. This results in high assembly efficiency, a tighter connection between the top cover plate 3 and the battery cell 1, high connection strength, and low cost. The specific composition of the structural adhesive is not limited; any existing structural adhesive capable of stably bonding the top cover plate 3 and the battery cell 1 can be used.

[0054] like Figure 1 As shown, the battery pack includes a lower housing 200 and a battery module. During assembly, two opposing first side plates 21 and two opposing second side plates 22 are prepared. The first side plates 21 and the second side plates 22 are sequentially and alternately connected to form a receiving space, and the battery cell 1 is placed in this receiving space. At the second opening, the first side plate 21 is recessed into the second side plate 22 to form a venting slit. The battery cell 1 is spaced apart from the first side plate 21 to form a third gap. The venting slit allows adhesive to fill the third gap through the venting slit.

[0055] The battery module is disposed within the accommodating space of the lower housing 200 and fixedly connected to the lower housing 200. Specifically, the lower housing 200 includes at least one adhesive strip 201, which is also fixedly connected to the inner bottom wall of the lower housing 200 by an adhesive layer. A fourth gap exists between the adhesive strip 201 and the inner sidewall of the lower housing 200, and the adhesive layer is disposed at the fourth gap and fixedly connected to the battery module.

[0056] The specific number of adhesive strips 201 is not limited, as long as they can stably support the battery module. The specific height of the adhesive strips 201 (the distance they protrude from the upper surface of the lower housing 200) is not limited, as long as they can create a gap between the bottom surface of the battery module housing 100 and the upper surface of the lower housing 200.

[0057] In this embodiment, the lower housing 200 includes at least two adhesive-limiting strips 201, all of which are arranged parallel to each other, and each adhesive-limiting strip 201 has a height of 1.5 mm. The adhesive-limiting strips 201 are spaced apart to form a fifth gap. The adhesive-limiting strips 201 are fixedly connected to the inner bottom wall of the lower housing 200, and the adhesive layer is disposed at the fifth gap and fixedly connected to the battery module.

[0058] During assembly, adhesive is applied to the lower housing 200, extending beyond the top surface of the adhesive limiting strip 201. That is, the height of the adhesive accumulated on the lower housing 200 far exceeds 1.5mm. When the battery module housing 100 is installed onto the top surface of the adhesive limiting strip 201, the excess adhesive will be squeezed and flow to other positions, ensuring that the gaps (mainly the fourth and fifth gaps) between the adhesive limiting strip 201, the bottom surface of the battery module housing 100, and the upper surface of the lower housing 200 are filled with adhesive. This prevents the battery module housing 100 from being loosely fixed due to hollow areas in certain locations.

[0059] The use of adhesive bonding replaces the existing structure of locking the battery module housing to the lower housing of the battery pack through module mounting points, which simplifies the structure of the battery module housing 100, facilitates assembly, and allows the battery module to be fixedly connected to the lower housing 200. The overall structure is more robust and stable after assembly.

[0060] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery module housing, characterized in that, include: The housing frame (2) includes at least two side plates, all of which are connected to form an accommodating space for accommodating the battery cell (1), the accommodating space including a first opening and a second opening disposed opposite to each other; A cover, partially covering the first opening, the cover being used for fixed connection with the battery cell (1); and, An insulating film (4) is attached to the cover, and the insulating film (4) can cover the part of the first opening that is not covered by the cover.

2. The battery module housing according to claim 1, characterized in that, The shell frame (2) includes two first side plates (21) and two second side plates (22) arranged opposite to each other. The first side plates (21) and the second side plates (22) are connected alternately in sequence and enclosed to form an accommodating space. The cover includes a top cover plate (3), the two ends of which are respectively connected to two second side plates (22), and there is a first gap between the top cover plate and the first side plate (21) so that the top cover plate partially covers the first opening; the side wall of the top cover plate (3) near the second side plate (22) is used to fix it to the battery cell (1). The two ends of the insulating film (4) are connected to the top cover plate (3) and the first side plate (21) respectively, and cover the part of the first opening that is not covered by the top cover plate (3).

3. The battery module housing according to claim 2, characterized in that, Along the direction in which the two first side plates (21) are spaced apart, the first side plates (21) and the top cover plate (3) are spaced apart and form a first gap; And / or, Along the covering direction of the top cover plate (3), the first side plate (21) is spaced apart from the top cover plate (3) to form a second gap, and the insulating film (4) covers the second gap; And / or, At the second opening, the first side plate (21) is recessed into the second side plate (22) and forms a slit for leakage. The battery cell (1) is spaced apart from the first side plate (21) and forms a third gap. The slit for leakage allows adhesive to fill the third gap through the slit.

4. The battery module housing according to claim 2, characterized in that, The second side plate (22) includes a convex-shaped second side plate body (221) and a second side plate edge (222) extending perpendicularly to the second side plate body (221); a connecting through hole (223) is provided on the side of the second side plate edge (222) near the first side plate (21), and a first side plate through hole (211) is provided on the first side plate (21) near the second side plate edge (222). The connecting through hole (223) and the first side plate through hole (211) are connected by a connector. And / or, The second side plate (22) includes a convex-shaped second side plate body (221) and a second side plate edge (222) extending vertically relative to the second side plate body (221). A connecting through hole (223) is provided on the side of the second side plate edge (222) near the cover body. A cover plate through hole (31) is provided on the side of the cover body near the second side plate edge (222). The connecting through hole (223) and the cover plate through hole (31) are connected by a connector.

5. The battery module housing according to claim 4, characterized in that, At least two lifting holes (224) are provided on the side of the second side plate edge (222) near the top cover plate (3), and all the connecting through holes (223) provided on the side of the second side plate edge (222) near the top cover plate (3) are located between the two lifting holes (224).

6. The battery module housing according to any one of claims 1 to 5, characterized in that, The shell frame (2) is made of non-metallic material; and / or, the cover is made of non-metallic material.

7. A battery module, comprising a battery cell (1), characterized in that, The battery module further includes a battery module housing (100) according to any one of claims 1 to 6, wherein the battery cell (1) is disposed in the accommodating space of the housing frame (2) and the battery cell (1) is fixedly connected to the cover.

8. A battery pack, including a lower housing (200), characterized in that, The battery pack further includes the battery module as described in claim 7, wherein the battery module is disposed within the accommodating space of the lower housing (200) and is fixedly connected to the lower housing (200).

9. The battery pack according to claim 8, characterized in that, The inner bottom wall of the lower housing (200) is provided with an adhesive layer, and the battery module is fixedly connected to the inner bottom wall of the lower housing (200) through the adhesive layer.

10. The battery pack according to claim 9, characterized in that, The battery module housing frame (2) includes two first side plates (21) and two second side plates (22) arranged opposite to each other. The first side plates (21) and the second side plates (22) are connected alternately in sequence and enclosed to form an accommodating space. At the second opening, the first side plate (21) is recessed into the second side plate (22) and forms a slit for leakage. The battery cell (1) is spaced apart from the first side plate (21) and forms a third gap. The slit for leakage allows the adhesive to fill the third gap through the slit. And / or, The lower housing (200) includes at least one adhesive limiting strip (201), the adhesive limiting strip (201) is fixedly connected to the inner bottom wall of the lower housing (200), there is a fourth gap between the adhesive limiting strip (201) and the inner side wall of the lower housing (200), the adhesive layer is disposed at the fourth gap and is fixedly connected to the battery module; And / or, The lower housing (200) includes at least two adhesive-limiting strips (201), which are spaced apart to form a fifth gap. The adhesive-limiting strips (201) are fixedly connected to the inner bottom wall of the lower housing (200), and the adhesive layer is disposed at the fifth gap and fixedly connected to the battery module.

Images