A battery casing

Abstract

The utility model discloses a battery shell. It relates to the technical field of new energy batteries. The application specifically includes a shell body that is surrounded by a circle, and a bottom shell arranged at the bottom of the shell body. The shell body is provided with a receiving cavity with upper and lower openings, the receiving cavity is used to load battery cells, and the bottom shell is used to close the bottom opening of the receiving cavity; a first edge sealing plate is provided at the bottom of the shell body, and a second edge sealing plate is provided at the outer periphery of the bottom shell. When the bottom shell closes the bottom opening of the receiving cavity, the second edge sealing plate fits with the first edge sealing plate, and the first edge sealing plate and the second edge sealing plate are rolled and heat-sealed to fix the bottom shell to the shell body. The utility model realizes the fixed connection between the bottom shell and the shell body by rolling and heat-sealing the first edge sealing plate and the second edge sealing plate, which not only makes the processing of the battery shell simple and convenient, but also improves the product yield of the battery shell processing, thereby reducing the manufacturing cost of the battery shell and enhancing the stability of the battery shell structure.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to a battery shell. Background Art

[0002] With the development of the energy storage industry, the competition in the energy storage battery market is becoming increasingly fierce. There is an urgent need for a low-cost, large-capacity battery to meet market demand. Existing battery shells are mostly stamped, and this process has great limitations. The maximum size can only be 73×275×208mm. Larger shells will be achieved by splicing welding, but the process required for splicing welding is complicated and the manufacturing cost is high. It involves welding and the product yield is also low.

[0003] Chinese patent CN217903317U, published on November 25, 2022, discloses a battery housing, a battery and its electrical equipment. The battery housing includes a shell body and a bottom plate. The shell body is a cylindrical structure with an open mouth at least at one end; the bottom plate covers the open mouth and is connected to the shell body by welding. The utility model provides a battery housing. Unlike the traditional battery housing, it connects the bottom plate and the shell body by welding so that the bottom plate and the shell body form a housing cavity for accommodating the battery. There is no gap between the bottom plate and the shell body, thereby avoiding the risk of dust, rainwater, etc. penetrating into the battery housing through the gap. However, the bottom plate of the battery housing is connected to the shell body by splicing welding. The process required for splicing welding is complicated and the manufacturing cost is high. It involves welding, and the product yield is also low, which cannot meet the current production needs. Utility Model Content

[0004] The purpose of the utility model is to provide a battery case to address the deficiencies of the prior art, which can make the processing of the battery case simpler and more convenient, while improving the product yield of the battery case processing, thereby reducing the manufacturing cost of the battery case.

[0005] The utility model provides a battery shell, comprising a shell body that is surrounded by a circle, and a bottom shell arranged at the bottom of the shell body, wherein the shell body is provided with a receiving cavity with upper and lower openings, the receiving cavity is used to load battery cells, and the bottom shell is used to close the bottom opening of the receiving cavity; a first edge sealing plate is provided at the bottom of the shell body, and a second edge sealing plate is provided at the outer periphery of the bottom shell, when the bottom shell closes the bottom opening of the receiving cavity, the second edge sealing plate is fitted with the first edge sealing plate, and the first edge sealing plate and the second edge sealing plate are rolled and heat-sealed to fix the bottom shell to the shell body.

[0006] Furthermore, the shell body includes four side plates, and the four side plates form a circle to form the accommodating cavity, and the first edge sealing plate is arranged at the bottom of the side plates.

[0007] Furthermore, the bottom shell includes a bottom plate and a sealing plate arranged on the bottom plate, the second edge sealing plate is arranged on the outer periphery of the bottom plate, and when the bottom shell closes the bottom opening of the accommodating cavity, the sealing plate is inserted into the bottom opening of the accommodating cavity.

[0008] Furthermore, a sealing groove is provided on the side wall of the accommodating cavity, and a sealing ring matching the sealing groove is provided on the outer periphery of the sealing plate.

[0009] Further, the sealing grooves are multiple and are axially arranged on the side wall of the accommodating cavity, the sealing rings are multiple and are axially arranged on the outer periphery of the sealing plate, and the sealing rings are flexible parts.

[0010] Furthermore, the four first edge sealing plates are respectively arranged at the bottom of the four side plates, the four second edge sealing plates are respectively arranged around the bottom plate, and the four second edge sealing plates are respectively bonded to the four first edge sealing plates.

[0011] Furthermore, the first edge sealing plate is horizontally arranged at the bottom of the side plate, and the second edge sealing plate is horizontally arranged at the periphery of the bottom plate.

[0012] Furthermore, the first edge sealing plate and the second edge sealing plate are folded and rolled toward the outside of the shell body.

[0013] Furthermore, the first edge sealing plate is vertically arranged at the bottom of the side plate, and the second edge sealing plate is vertically arranged at the periphery of the bottom plate.

[0014] Furthermore, the first edge sealing plate and the second edge sealing plate are folded and rolled toward the inner side of the shell body.

[0015] The utility model provides a battery housing with the following gain effects:

[0016] (1) The bottom of the shell body of the battery shell is provided with a first edge sealing plate, and the outer periphery of the bottom shell is provided with a second edge sealing plate. When the second edge sealing plate on the outer periphery of the bottom shell is attached to the first edge sealing plate at the bottom of the shell body, the bottom shell and the shell body are fixedly connected by rolling and heat-sealing the first edge sealing plate and the second edge sealing plate, which not only makes the processing of the battery shell simple and convenient, but also improves the product yield of the battery shell processing, thereby reducing the manufacturing cost of the battery shell and enhancing the stability of the battery shell structure;

[0017] (2) The sealing plate of the battery housing is vertically arranged on the top of the bottom plate, and the cross-sectional range of the sealing plate is smaller than the cross-sectional range of the bottom plate, so that the sealing plate and the bottom plate form a step structure. On the one hand, the sealing plate can cooperate with the accommodating cavity to improve the sealing performance of the battery housing; on the other hand, the second edge sealing plate can be limited, so that the edge alignment of the second edge sealing plate and the first edge sealing plate when they are attached is easier to achieve;

[0018] (3) A sealing groove is provided on the side wall of the accommodating cavity of the battery housing along the circumferential direction, and a sealing collar is provided on the outer circumference of the sealing plate. When the sealing plate is plugged into the bottom opening of the accommodating cavity, the sealing collar on the outer circumference of the sealing plate cooperates with the sealing groove on the side wall of the accommodating cavity, so that the bottom shell can better seal the bottom opening of the accommodating cavity, further improving the sealing performance of the battery housing;

[0019] (4) The sealing collar of the battery housing can be made of a flexible member, which can make it easier to insert the sealing plate with the sealing collar on the outer periphery into the accommodating cavity. On the other hand, the sealing collar of the flexible member has elastic deformation ability, which can make the sealing collar and the sealing groove have an interference fit, thereby further making the bottom shell better seal the bottom opening of the accommodating cavity, thereby improving the sealing performance of the battery housing.

[0020] (5) The bottom of each of the four side panels of the battery housing is provided with a first edge sealing plate, and each of the four sides of the bottom panel is provided with a second edge sealing plate. When the bottom shell seals the bottom opening of the accommodating cavity, the four second edge sealing plates are respectively fitted with the four first edge sealing plates. By heat-sealing the four first edge sealing plates and the corresponding second edge sealing plates, the fixed connection between the bottom shell and the housing body is made more stable, thereby enhancing the stability of the battery housing structure;

[0021] (6) The first edge sealing plate of the battery shell is horizontally arranged at the bottom of the side plate, and the second edge sealing plate is horizontally arranged at the outer periphery of the bottom plate. When the bottom shell closes the bottom opening of the accommodating cavity, the second edge sealing plate fits with the first edge sealing plate in the horizontal direction, thereby facilitating the rolling and heat sealing of the first edge sealing plate and the second edge sealing plate, thereby achieving a fixed connection between the bottom shell and the shell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and, together with the description, are used to explain the principle of the utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0023] Figure 1 This is a schematic structural diagram of a first edge sealing plate and a second edge sealing plate of a battery housing in Example 1 of the utility model before being rolled and heat-sealed;

[0024] Figure 2This is a cross-sectional view of a first edge sealing plate and a second edge sealing plate of a battery housing of an embodiment of the utility model after being rolled and heat-sealed;

[0025] Figure 3 This is a schematic structural diagram of a housing body of a first embodiment of a battery housing according to an embodiment of the utility model;

[0026] Figure 4 This is a schematic structural diagram of a bottom shell of a battery shell of a first embodiment of the utility model;

[0027] Figure 5 It is a schematic structural diagram of a first edge sealing plate and a second edge sealing plate of a second embodiment of a battery housing of an embodiment of the utility model before being rolled and heat-sealed;

[0028] Figure 6 It is a cross-sectional view of the first edge sealing plate and the second edge sealing plate of the second embodiment of a battery housing of the utility model after being rolled and heat-sealed;

[0029] Figure 7 This is a bottom view of a first edge sealing plate and a second edge sealing plate of a battery housing of a second embodiment of the utility model after being rolled and heat-sealed.

[0030] In the figure: 1, shell body; 11, side plate; 12, accommodating cavity; 121, sealing groove; 13, first edge sealing plate; 2, bottom shell; 21, bottom plate; 22, sealing plate; 221, sealing ring; 23, second edge sealing plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] A battery case of an embodiment of the utility model comprises a case body 1 which is surrounded by a circle, and a bottom shell 2 which is arranged at the bottom of the case body 1. A receiving cavity 12 with upper and lower openings is arranged in the case body 1. The receiving cavity 12 is used to load the battery cell, and the bottom shell 2 is used to seal the bottom opening of the receiving cavity 12. A first edge sealing plate 13 is arranged at the bottom of the case body 1, and a second edge sealing plate 23 is arranged at the periphery of the bottom shell 2. When the bottom shell 2 seals the bottom opening of the receiving cavity 12, the second edge sealing plate 23 is fitted with the first edge sealing plate 13, and the first edge sealing plate 13 and the second edge sealing plate 23 are rolled and heat-sealed to fix the bottom shell 2 with the case body 1. Figure 1 and Figure 5 .

[0033] In the present application, the battery case includes a case body 1 and a bottom case 2. The case body 1 is surrounded so that the inside of the case body 1 forms a receiving cavity 12 with upper and lower openings. The bottom case 2 is arranged at the bottom of the case body 1 to close the bottom opening of the receiving cavity 12, so that the receiving cavity 12 can load the battery cell. It is foreseeable that: a top cover assembly is also provided in the battery case. After the battery cell is loaded in the receiving cavity 12, the top opening of the receiving cavity 12 is closed by the top cover assembly, so that the battery case forms a closed case.

[0034] In existing large-sized battery shells, the shell body and the bottom plate are usually fixedly connected by splicing welding, so that the bottom plate closes the bottom opening of the shell body. However, the process required for splicing welding is complicated and the manufacturing cost is high. It involves welding, and the product yield is also low. Therefore, in this application, the shell body 1 and the bottom shell 2 are separately manufactured by stamping or extrusion molding, and a first edge sealing plate 13 is provided at the bottom of the shell body 1, and a second edge sealing plate 23 is provided on the periphery of the bottom shell 2. When the bottom shell 2 closes the bottom opening of the accommodating cavity 12, the second edge sealing plate 23 on the periphery of the bottom shell 2 fits with the first edge sealing plate 13 at the bottom of the shell body 1, and then the first edge sealing plate 13 and the second edge sealing plate 23 are rolled and heat-sealed.

[0035] Rolling heat sealing means: firstly, the first edge sealing plate 13 and the second edge sealing plate 23 which are bonded together are heated, and the heated first edge sealing plate 13 and the second edge sealing plate 23 have deformable ability, and then the deformable first edge sealing plate 13 and the second edge sealing plate 23 are folded and rolled, so that the first edge sealing plate 13 and the second edge sealing plate 23 are wrapped and overlapped with each other, and finally, the first edge sealing plate 13 and the second edge sealing plate 23 are waited to cool down, and the cooled first edge sealing plate 13 and the second edge sealing plate 23 lose their deformable ability, so that the first edge sealing plate 13 and the second edge sealing plate 23 remain in a tightly overlapped state, that is, the first edge sealing plate 13 and the second edge sealing plate 23 form an integral structure, thereby realizing the fixed connection between the bottom shell 2 and the shell body 1.

[0036] Since the heated first edge sealing plate 13 and the second edge sealing plate 23 are deformable, the folding and rolling operations are easy to implement. After the folding and rolling are completed, it is only necessary to wait for the first edge sealing plate 13 and the second edge sealing plate 23 to cool naturally. The cooled first edge sealing plate 13 and the second edge sealing plate 23 will form an integral structure without the need for other operations. Therefore, the manufacture of the battery shell in this way instead of welding not only makes the processing of the battery shell simple and convenient, but also improves the product yield of the battery shell processing, thereby reducing the manufacturing cost of the battery shell and enhancing the stability of the battery shell structure. It can be foreseen that: in the present application, the first edge sealing plate 13 and the second edge sealing plate 23 can be made of thermoplastic plastic.

[0037] In this embodiment, the housing body 1 includes four side plates 11, which are surrounded by a circle to form a receiving cavity 12. The first edge sealing plate 13 is arranged at the bottom of the side plates 11. Figure 3 . In the present application, the battery shell is a square shell, so the shell body 1 is a square frame structure composed of four side panels 11, and the four side panels 11 are surrounded to form a receiving cavity 12 with upper and lower openings. The first edge sealing plate 13 is arranged at the bottom of the side panel 11. When the bottom shell 2 closes the bottom opening of the receiving cavity 12, the second edge sealing plate 23 on the bottom shell 2 fits with the first edge sealing plate 13 at the bottom of the side panel 11, so that the bottom shell 2 and the shell body 1 are fixedly connected by rolling and heat sealing the first edge sealing plate 13 and the second edge sealing plate 23. In the present application, the shell body 1 is integrally formed by stamping or extrusion, and the four side panels 11 and the first edge sealing plate 13 are an integral structure, so the shell body 1 as a whole can be made of thermoplastic plastic.

[0038] In this embodiment, the bottom shell 2 includes a bottom plate 21, and a sealing plate 22 disposed on the bottom plate 21. The second edge sealing plate 23 is disposed on the outer periphery of the bottom plate 21. When the bottom shell 2 seals the bottom opening of the accommodating cavity 12, the sealing plate 22 is inserted into the bottom opening of the accommodating cavity 12. Figure 4 . In the present application, the bottom shell 2 includes a bottom plate 21 and a sealing plate 22, the sealing plate 22 is vertically arranged on the top of the bottom plate 21, and the second edge sealing plate 23 is arranged on the periphery of the bottom plate 21. When the bottom shell 2 closes the bottom opening of the accommodating cavity 12, the sealing plate 22 is inserted into the bottom opening of the accommodating cavity 12 until the second edge sealing plate 23 on the periphery of the bottom plate 21 fits with the first edge sealing plate 13 at the bottom of the side plate 11, thereby achieving a fixed connection between the bottom shell 2 and the shell body 1 by rolling and heat-sealing the first edge sealing plate 13 and the second edge sealing plate 23. In the present application, the bottom shell 2 is integrally formed by stamping or extrusion, and the bottom plate 21, the sealing plate 22 and the first edge sealing plate 13 are an integral structure, so the bottom shell 2 as a whole can be made of thermoplastic plastic.

[0039] Since the sealing plate 22 is vertically arranged on the top of the bottom plate 21, and the cross-sectional range of the sealing plate 22 is smaller than the cross-sectional range of the bottom plate 21, the sealing plate 22 and the bottom plate 21 form a step structure. When the bottom shell 2 closes the bottom opening of the accommodating cavity 12, the sealing plate 22 is plugged into the bottom opening of the accommodating cavity 12. On the one hand, the bottom shell 2 can better seal the bottom opening of the accommodating cavity 12 through the cooperation of the sealing plate 22 and the accommodating cavity 12, thereby improving the sealing of the battery shell; on the other hand, through the cooperation of the sealing plate 22 and the accommodating cavity 12, and the step structure formed by the sealing plate 22 and the bottom plate 21, the second edge plate 23 can be limited, so that the alignment of the edge lines of the second edge plate 23 and the first edge plate 13 when they are fitted together is easier to achieve, thereby making the processing of the battery shell simpler and more convenient.

[0040] In this embodiment, a sealing groove 121 is provided on the side wall of the accommodating cavity 12, and a sealing ring 221 is provided on the outer periphery of the sealing plate 22 to cooperate with the sealing groove 121. Figure 2 , Figure 3 , Figure 4 and Figure 6 In the present application, a sealing groove 121 is circumferentially provided on the side wall of the accommodating cavity 12, and a sealing collar 221 is provided on the outer periphery of the sealing plate 22. When the sealing plate 22 is plugged into the bottom opening of the accommodating cavity 12, the sealing collar 221 on the outer periphery of the sealing plate 22 cooperates with the sealing groove 121 on the side wall of the accommodating cavity 12, so that the bottom shell 2 can better seal the bottom opening of the accommodating cavity 12, further improving the sealing performance of the battery housing.

[0041] In this embodiment, the sealing grooves 121 are multiple and are arranged axially on the side wall of the accommodating cavity 12. The sealing rings 221 are multiple and are arranged axially on the outer periphery of the sealing plate 22. The sealing rings 221 are flexible members. Figure 2 , Figure 3 , Figure 4 and Figure 6 In the present application, a plurality of sealing grooves 121 are axially distributed on the side wall of the accommodating cavity 12, and a plurality of sealing collars 221 are axially distributed on the outer periphery of the sealing plate 22. When the sealing plate 22 is plugged into the bottom opening of the accommodating cavity 12, the plurality of sealing collars 221 respectively cooperate with the plurality of sealing grooves 121, so that the bottom shell 2 can further better seal the bottom opening of the accommodating cavity 12, thereby improving the sealing performance of the battery housing.

[0042] In the present application, the sealing ring 221 can be a flexible part. On the one hand, it can make it easier to insert the sealing plate 22 with the sealing ring 221 on the outer periphery into the accommodating cavity 12, thereby making the processing of the battery shell simpler and more convenient; on the other hand, the sealing ring 221 of the flexible part has elastic deformation ability. Therefore, when the sealing plate 22 is inserted into the accommodating cavity 12, the elastic deformation ability of the sealing ring 221 can make the sealing ring 221 and the sealing groove 121 have an interference fit, thereby further making the bottom shell 2 better seal the bottom opening of the accommodating cavity 12, thereby improving the sealing performance of the battery shell.

[0043] In this embodiment, the first edge sealing plates 13 are four respectively arranged at the bottom of the four side plates 11, and the second edge sealing plates 23 are four respectively arranged around the bottom plate 21. The four second edge sealing plates 23 are respectively attached to the four first edge sealing plates 13. Figure 1 and Figure 5In the present application, a first edge-sealing plate 13 is provided at the bottom of each of the four side plates 11, and a second edge-sealing plate 23 is provided around each of the four sides of the bottom plate 21. When the bottom shell 2 closes the bottom opening of the accommodating cavity 12, the four second edge-sealing plates 23 are respectively fitted with the four first edge-sealing plates 13, and the four first edge-sealing plates 13 and the corresponding second edge-sealing plates 23 are rolled and heat-sealed to make the fixed connection between the bottom shell 2 and the shell body 1 more stable, thereby enhancing the stability of the battery shell structure.

[0044] Example 1, see Figure 1 , Figure 2 , Figure 3 and Figure 4 :

[0045] In the present application, the first edge sealing plate 13 is horizontally arranged at the bottom of the side plate 11, and the second edge sealing plate 23 is horizontally arranged at the periphery of the bottom plate 21. When the bottom shell 2 closes the bottom opening of the accommodating cavity 12, the second edge sealing plate 23 fits with the first edge sealing plate 13 in the horizontal direction, so as to facilitate the heat sealing of the first edge sealing plate 13 and the second edge sealing plate 23, and realize the fixed connection between the bottom shell 2 and the shell body 1.

[0046] When the second edge sealing plate 23 is horizontally attached to the first edge sealing plate 13, the first edge sealing plate 13 and the second edge sealing plate 23 are rolled, and the first edge sealing plate 13 and the second edge sealing plate 23 are turned and folded outwards so that the first edge sealing plate 13 and the second edge sealing plate 23 are wrapped and overlapped with each other. Figure 2 The first edge plate 13 and the second edge plate 23 can also be turned inward and folded so that the first edge plate 13 and the second edge plate 23 are wrapped and overlapped with each other, see Figure 6 Based on the present embodiment, the second edge sealing plate 23 is horizontally attached to the first edge sealing plate 13, and the first edge sealing plate 13 and the second edge sealing plate 23 are preferably flipped and folded outwards. Compared with the flipping and folding inwards, the flipping and folding outwards can reduce the number of flipping and folding of the first edge sealing plate 13 and the second edge sealing plate 23, thereby making the processing of the battery shell simpler and more convenient.

[0047] Example 2, see Figure 5 , Figure 6 and Figure 7 :

[0048] In the present application, the first edge sealing plate 13 is vertically arranged at the bottom of the side plate 11, and the second edge sealing plate 23 is vertically arranged at the periphery of the bottom plate 21. When the bottom shell 2 closes the bottom opening of the accommodating cavity 12, the second edge sealing plate 23 is vertically fitted with the first edge sealing plate 13, so as to facilitate the heat sealing of the first edge sealing plate 13 and the second edge sealing plate 23, and realize the fixed connection between the bottom shell 2 and the shell body 1.

[0049] Since in the present embodiment, the second edge sealing plate 23 is vertically fitted with the first edge sealing plate 13 on the inner side of the first edge sealing plate 13, compared with the first embodiment, the second edge sealing plate 23 is horizontally fitted with the first edge sealing plate 13. When the bottom shell 2 closes the bottom opening of the accommodating cavity 12, the second edge sealing plate 23 of the present embodiment can limit the first edge sealing plate 13, thereby making the processing of the battery shell simpler and more convenient, and making the stability of the battery shell structure stronger.

[0050] When the second edge sealing plate 23 is vertically attached to the first edge sealing plate 13, and the first edge sealing plate 13 and the second edge sealing plate 23 are rolled, the first edge sealing plate 13 and the second edge sealing plate 23 can be turned and folded outwards so that the first edge sealing plate 13 and the second edge sealing plate 23 are wrapped and overlapped with each other. Figure 2 The first edge plate 13 and the second edge plate 23 can also be turned inward and folded so that the first edge plate 13 and the second edge plate 23 are wrapped and overlapped with each other, see Figure 6 Based on the present embodiment, the second edge sealing plate 23 is vertically attached to the first edge sealing plate 13, and the first edge sealing plate 13 and the second edge sealing plate 23 are preferably flipped and folded inwards. Compared with the flipping and folding outwards, the flipping and folding inwards can reduce the number of flipping and folding of the first edge sealing plate 13 and the second edge sealing plate 23, thereby making the processing of the battery shell simpler and more convenient.

[0051] It should be noted that: since each of the four side panels 11 has a first edge-sealing plate 13 at the bottom, and each of the four sides of the bottom panel 21 has a second edge-sealing plate 23, when the bottom shell 2 is fixedly connected to the shell body 1, the four first edge-sealing plates 13 and the corresponding second edge-sealing plates 23 need to be rolled and heat-sealed. When the first edge-sealing plates 13 and the second edge-sealing plates 23 are rolled by the inward flipping and folding method, the first edge-sealing plates 13 and the corresponding second edge-sealing plates 23 on the four sides are folded at the bottom of the bottom panel 21, which may interfere with each other at the bottom of the bottom panel 21, while the outward flipping and folding method will not cause such a problem.

[0052] Therefore, the inward flipping and folding method is adopted. When designing the size of the first edge-sealing panels 13 at the bottom of the four side panels 11 and the size of the four second edge-sealing panels 23 around the bottom panel 21, it is necessary to consider that the first edge-sealing panels 13 on the four sides and the corresponding second edge-sealing panels 23 can be folded at the bottom of the bottom panel 21 without causing mutual interference. Specifically: the two ends of the second edge-sealing panels 23 set on the short side of the bottom panel 21 can be kept a certain distance away from the edge line to avoid the second edge-sealing panels 23 on the long side of the bottom panel 21 after folding. The size of the first edge-sealing panels 13 at the bottom of the four side panels 11 is the same as the size of the corresponding second edge-sealing panels 23. Figure 7 .

[0053] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A battery housing, characterized in that: The invention comprises a shell body (1) which is surrounded in a circle, and a bottom shell (2) which is arranged at the bottom of the shell body (1); a receiving cavity (12) with upper and lower openings is arranged in the shell body (1); the receiving cavity (12) is used to load a battery cell, and the bottom shell (2) is used to seal the bottom opening of the receiving cavity (12); a first edge sealing plate (13) is arranged at the bottom of the shell body (1), and a second edge sealing plate (23) is arranged at the outer periphery of the bottom shell (2); when the bottom shell (2) seals the bottom opening of the receiving cavity (12), the second edge sealing plate (23) is fitted with the first edge sealing plate (13), and the first edge sealing plate (13) and the second edge sealing plate (23) are rolled and heat-sealed to fix the bottom shell (2) to the shell body (1).

2. A battery housing as claimed in claim 1, characterized in that: The shell body (1) comprises four side plates (11), the four side plates (11) forming a circle to form the accommodating cavity (12), and the first edge sealing plate (13) is arranged at the bottom of the side plates (11).

3. A battery casing as claimed in claim 2, characterized in that: The bottom shell (2) comprises a bottom plate (21) and a sealing plate (22) arranged on the bottom plate (21); the second edge sealing plate (23) is arranged on the outer periphery of the bottom plate (21); when the bottom shell (2) seals the bottom opening of the accommodating cavity (12), the sealing plate (22) is plugged into the bottom opening of the accommodating cavity (12).

4. A battery casing as claimed in claim 3, characterized in that: A sealing groove (121) is provided on the side wall of the accommodating cavity (12), and a sealing collar (221) matching the sealing groove (121) is provided on the outer periphery of the sealing plate (22).

5. A battery casing as claimed in claim 4, characterized in that: The sealing grooves (121) are multiple and are arranged axially on the side wall of the accommodating cavity (12); the sealing collars (221) are multiple and are arranged axially on the outer periphery of the sealing plate (22); and the sealing collars (221) are flexible parts.

6. A battery casing as claimed in claim 3, characterized in that: The four first edge sealing plates (13) are respectively arranged at the bottom of the four side plates (11), the four second edge sealing plates (23) are respectively arranged around the bottom plate (21), and the four second edge sealing plates (23) are respectively bonded to the four first edge sealing plates (13).

7. A battery casing as claimed in claim 3, characterized in that: The first edge sealing plate (13) is horizontally arranged at the bottom of the side plate (11), and the second edge sealing plate (23) is horizontally arranged at the periphery of the bottom plate (21).

8. A battery casing as claimed in claim 7, characterized in that: The first edge sealing plate (13) and the second edge sealing plate (23) are folded and rolled toward the outside of the shell body (1).

9. A battery casing as claimed in claim 3, characterized in that: The first edge sealing plate (13) is vertically arranged at the bottom of the side plate (11), and the second edge sealing plate (23) is vertically arranged at the outer periphery of the bottom plate (21).

10. A battery casing as claimed in claim 9, characterized in that: The first edge sealing plate (13) and the second edge sealing plate (23) are folded and rolled toward the inner side of the shell body (1).

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