Battery shell assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery shell assembly and a battery, the battery shell assembly comprises a shell and a cover body covering the shell, an accommodating cavity is formed between the shell and the cover body, a battery cell is placed in the accommodating cavity, and two opposite sides of the battery cell are provided with a first tab and a second tab; the shell is provided with a pole connected with the first tab, and the cover body is provided with a flange connected with the second tab. The battery shell assembly can meet the assembly requirement of the battery cell with the tabs on the two sides, the battery cell is convenient to assemble, and the space utilization rate of the accommodating cavity is high.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery casing assembly and a battery. Background Technology

[0002] Existing battery casings are generally made of metal sheets through stretching or stamping processes to form a square casing structure. The positive and negative tabs of the single-pole group cells are generally located on the same side, and the cells with tabs on the same side are welded to the side wall of the battery casing where the poles are located. However, for cells with positive and negative tabs located on both sides of the cell (i.e., cells with tabs on both sides), the existing battery casings cannot be adapted and cannot meet the welding and fixing requirements of cells with tabs on both sides. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a battery housing assembly and a battery.

[0004] A first aspect of this utility model provides a battery housing assembly, comprising: a housing and a cover fitted onto the housing, wherein a receiving cavity is formed between the housing and the cover, the receiving cavity is used to place a battery cell, and the battery cell has a first tab and a second tab on opposite sides;

[0005] The housing is provided with a pole post connected to the first pole tab, and the cover is provided with a flange connected to the second pole tab.

[0006] The battery housing assembly provided by this utility model has a simple structure, can meet the assembly requirements of the battery cells with tabs on both sides, and is easy to assemble. It has a high space utilization rate of the cavity and a high energy density of the battery.

[0007] In addition, the battery casing assembly of this utility model may also have the following additional technical features:

[0008] In some embodiments, the housing includes a first sidewall and a second sidewall disposed opposite to each other along a first direction; wherein, a mounting hole is provided on the first sidewall, and the pole post is disposed in the mounting hole; a through opening is provided on the second sidewall, and the second pole tab passes through the through opening and is connected to the flange.

[0009] In some embodiments, the width of the through-hole is greater than the width of the second electrode tab.

[0010] In some embodiments, the second sidewall is recessed at the through opening towards the side closest to the first sidewall to form a groove, the flange is fitted into the groove, and the outer surface of the flange is flush with the end face of the second sidewall away from the first sidewall.

[0011] In some embodiments, the area of ​​the flange is larger than the area of ​​the through opening, and the distance between the groove and the end face of the second sidewall away from the first sidewall is 0.3mm to 1mm.

[0012] In some embodiments, the housing further includes a third sidewall and a fourth sidewall disposed opposite to each other along a second direction, the second direction intersecting the first direction; a face wall is disposed on the same side of the first sidewall, the second sidewall, the third sidewall and the fourth sidewall, the first sidewall, the third sidewall, the second sidewall, the fourth sidewall and the face wall enclosing to form a housing having the receiving cavity.

[0013] In some embodiments, the cover is provided with at least one pressure relief groove, the pressure relief groove being located on the end face of the cover near the housing, or / and the pressure relief groove being located on the end face of the cover away from the housing;

[0014] Or / and, the housing is provided with at least one pressure relief groove, the pressure relief groove being located on the end face of the housing near the cover, or / and, the pressure relief groove being located on the end face of the housing away from the cover.

[0015] In some embodiments, the pressure relief groove is disposed on the cover near the first electrode tab and / or the second electrode tab;

[0016] Or / and, the pressure relief groove is disposed on the housing near the first electrode tab and / or the second electrode tab.

[0017] In some embodiments, a boss is provided on the end face of the cover near the housing, and the cover is inserted into and sealed with the housing through the boss.

[0018] A second aspect of this utility model provides a battery, the battery including a cell and a battery housing assembly as described in any embodiment of this application, the cell having a first tab and a second tab on opposite sides, the cell being located within the receiving cavity, and the first tab being connected to the terminal post of the housing, and the second tab being connected to a flange on the cover.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1An exemplary perspective structural diagram of the battery housing assembly provided in the embodiments of this application;

[0022] Figure 2 An exemplary perspective structural diagram of the battery housing assembly provided in the embodiments of this application;

[0023] Figure 3 An exploded view of the battery housing assembly provided in an embodiment of this application;

[0024] Figure 4 A perspective view of the housing provided in the embodiments of this application;

[0025] Figure 5 A side view of the cover provided in an embodiment of this application;

[0026] Figure 6 A structural diagram of the second sidewall provided in an embodiment of this application;

[0027] Figure 7 A side view of the battery cell provided in an embodiment of this application;

[0028] Figure 8 This is an internal cross-sectional view of the battery housing assembly provided in an embodiment of this application;

[0029] Figure 9 for Figure 8 Enlarged view of a portion of point A in the middle;

[0030] Figure 10 A half-sectional view of the pole post installed on the first sidewall, provided in an embodiment of this application;

[0031] Figure 11 A three-dimensional structural diagram of the pole provided in the embodiments of this application;

[0032] Figure 12 This is a three-dimensional structural diagram of the pole provided in an embodiment of this application.

[0033] In the above image:

[0034] 10 Housing; 101 First sidewall; 1010 Mounting hole; 102 Second sidewall; 1020 Through opening; 1021 Groove; 103 Third sidewall; 104 Fourth sidewall; 105 Face wall; 106 Receiving cavity;

[0035] 20 Cover; 201 Flanged edge; 202 Pressure relief groove; 203 Boss;

[0036] 30 Battery cell; 301 First tab; 302 Second tab;

[0037] 40. Pole post; 401. Substrate; 402. First limiting element; 403. Second limiting element; 404. Injection hole; 405. Limiting groove;

[0038] 50 Seal; 60 First insulation; 70 Second insulation; 80 Baffle. Detailed Implementation

[0039] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0042] Unless the context otherwise requires, throughout the specification and claims, the term “comprising” is interpreted as open and encompassing, that is, “including, but not limited to”.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0044] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0045] like Figures 1 to 12As shown, in a first aspect, this utility model provides a battery housing assembly, including: a housing 10 and a cover 20 covering the housing 10, wherein a receiving cavity 106 is formed between the housing 10 and the cover 20, and the receiving cavity 106 is used to place a battery cell 30, wherein the battery cell 30 has a first tab 301 and a second tab 302 on opposite sides.

[0046] The housing 10 is provided with a pole post 40 connected to the first pole tab 301, and the cover 20 is provided with a flange 201 connected to the second pole tab 302.

[0047] Specifically, the shell 10 is an integrally formed structure with an open end on one side and an internal receiving cavity 106. The cover 20 is an integrally formed structure that can cover the open end of the shell 10 to form a closed structure of the receiving cavity 106. The area of ​​the open end is relatively large, which facilitates the placement of the battery cell 30 in the receiving cavity 106 and improves the ease of assembly of the battery cell 30. The battery cell 30 is the core part inside the battery and is mainly composed of a positive electrode, a negative electrode, a separator, and an electrolyte. The separator is located between the positive electrode and the negative electrode. The positive electrode is connected to a first tab 301, and the negative electrode is connected to a second tab 302. The first tab 301 and the second tab 302 are located on opposite sides of the battery cell 30.

[0048] In this example, the terminal post 40 fixedly disposed on the housing 10 is connected to the first tab 301 on one side of the cell 30, and the flange 201 fixedly disposed on the cover 20 is connected to the second tab 302 on the other side of the cell 30. The battery housing assembly provided in this application embodiment is suitable for cells 30 with tabs on both sides. The cell 30 is easy to assemble, and the second tab 302 directly passes through the through hole and connects to the flange 201, which reduces the bending connection that occupies the internal space of the receiving cavity 106 when the second tab 302 is also connected to the terminal post 40, improves the space utilization of the receiving cavity 106, and thus improves the energy density of the battery.

[0049] The shell 10 and the cover 20 can be made of the same or different metal materials, including but not limited to stainless steel, aluminum and its alloys, or magnesium alloys.

[0050] The battery housing assembly provided by this utility model has a simple structure, can meet the assembly requirements of the battery cells 30 with tabs on both sides, and the battery cells 30 are easy to assemble, with high space utilization of the receiving cavity 106.

[0051] In some implementations, such as Figures 1 to 4As shown, the housing 10 includes a first sidewall 101 and a second sidewall 102 disposed opposite to each other along a first direction; wherein, the first sidewall 101 is provided with a mounting hole 1010, and the pole post 40 is disposed in the mounting hole 1010; the second sidewall 102 is provided with a through opening 1020, and the second pole lug 302 passes through the through opening 1020 and is connected to the flange 201.

[0052] Specifically, the first sidewall 101 of the housing 10 has a mounting hole 1010, and the pole post 40 is fixed to the first sidewall 101 through the mounting hole 1010. The first tab 301 located on one side of the cell 30 can be directly connected to the pole post 40. The second sidewall 102 of the housing 10 has a through hole 1020 extending in the first direction. The second tab 302 located on the other side of the cell 30 can pass through the through hole 1020 and connect to the flange 201. The cell 30 is easy to assemble with the housing 10 and the cover 20. The connection between the first tab 301 and the pole post 40, and the connection between the second tab 302 and the flange 201 can be fixed by welding or other methods.

[0053] It should be noted that the pole post 40 is insulated and sealed to the housing 10 through the mounting hole 1010, so as to avoid the first pole tab 301 and the second pole tab 302 forming a direct connection path and causing a short circuit.

[0054] In some implementations, such as Figure 6 and Figure 7 The width of the through-hole 1020 shown is greater than the width of the second electrode tab 302.

[0055] Specifically, the width W1 of the through-hole 1020 along the second direction is greater than the width W2 of the second tab 302 along the second direction, i.e., W1 > W2. The second direction is intersecting the first direction, preferably perpendicular, so that the second tab 302 can pass smoothly through the through-hole 1020 and connect with the flange 201. This avoids bending the second tab 302 when it is also connected to the pole 40, which would occupy the internal space of the receiving cavity 106, thus improving the space utilization of the receiving cavity 106 and thereby increasing the energy density of the battery.

[0056] In some implementations, such as Figure 2 and Figure 4 As shown, the second sidewall 102 is recessed at the through opening 1020 towards the side close to the first sidewall 101 to form a groove 1021. The flange 201 is fitted into the groove 1021, and the outer surface of the flange 201 is flush with the end face of the second sidewall 102 away from the first sidewall 101.

[0057] Specifically, the second sidewall 102 is recessed at the through-hole 1020 to form a groove 1021 that covers the through-hole 1020. The size of the flange 201 is adapted to the size of the groove 1021. When the flange 201 is installed in the groove 1021, the inner side of the flange 201 can block the through-hole 1020 to form a closed receiving cavity 106. The outer side of the flange 201 is flush with the outer surface of the second sidewall 102, forming a battery housing assembly with good sealing performance and beautiful appearance.

[0058] In some embodiments, the area of ​​the flange 201 is larger than the area of ​​the through opening 1020, and the distance between the groove 1021 and the end face of the second sidewall 102 away from the first sidewall 101 is 0.3mm to 1mm.

[0059] Specifically, the area of ​​the flange 201 is larger than the area of ​​the through opening 1020, so that the inner side of the flange 201 (the side of the flange 201 closest to the receiving cavity 106) can cover the through opening 1020 to form a closed receiving cavity 106. The distance between the bottom of the groove 1021 and the outer surface of the second sidewall 102 is 0.3mm~1mm, which facilitates the second sidewall 102 to form a groove 1021 covering the through opening 1020 at the through opening 1020. This is beneficial for the insertion and mating of the flange 201 and the groove 1021, which can ensure the strength of the sidewall at the groove 1021 and the sealing after the electrode is connected.

[0060] In some implementations, such as Figure 4 As shown, the housing 10 further includes a third sidewall 103 and a fourth sidewall 104 disposed opposite to each other along a second direction, the second direction intersecting the first direction; a face wall 105 is disposed on the same side of the first sidewall 101, the second sidewall 102, the third sidewall 103 and the fourth sidewall 104, and the first sidewall 101, the third sidewall 103, the second sidewall 102, the fourth sidewall 104 and the face wall 105 enclose to form a housing 10 having the receiving cavity 106.

[0061] Specifically, the third sidewall 103 and the fourth sidewall 104 have the same area, the area of ​​the face wall 105 is larger than the area of ​​the first sidewall 101 and the area of ​​the second sidewall 102, and the area of ​​the face wall 105 is larger than the area of ​​the third sidewall 103. The first sidewall 101, the third sidewall 103, the second sidewall 102, the fourth sidewall 104 and the face wall 105 are sequentially arranged to form a square shell 10 structure with an open end on one side and an internal cavity 106. The open end is arranged opposite to the face wall 105, so that the area of ​​the open end is larger, which is beneficial to the assembly of the battery cell 30.

[0062] In some implementations, such as Figures 1 to 3As shown, at least one pressure relief groove 202 is provided on the cover 20. The pressure relief groove 202 is located on the end face of the cover 20 near the housing 10, or / and the pressure relief groove 202 is located on the end face of the cover 20 away from the housing 10.

[0063] Or / and, the housing 10 is provided with at least one pressure relief groove 202, the pressure relief groove 202 is located on the end face of the housing 10 near the cover 20, or / and, the pressure relief groove 202 is located on the end face of the housing 10 away from the cover 20.

[0064] Specifically, the cover 20 and / or the housing 10 are provided with pressure relief grooves 202. The number and shape of the pressure relief grooves 202 can be set according to actual needs. The pressure relief grooves 202 can be set on the inner surface (the end face of the cover 20 near the housing 10) or the outer surface (the end face of the cover 20 away from the housing 10); or / and, the pressure relief grooves 202 can be set on the inner surface (the end face of the housing 10 near the cover 20) or the outer surface (the end face of the housing 10 away from the cover 20). For example, the number of pressure relief grooves 202 is 1 to 6, and the shape of the pressure relief grooves 202 can be arc-shaped, straight, or zigzag. When the gas generated by the battery cell 30 inside the battery is large and the pressure is high, the setting of the pressure relief grooves 202 causes the cover 20 and / or the housing 10 to be ruptured first at the position of the pressure relief grooves 202, which plays a role in explosion prevention and pressure relief.

[0065] In some implementations, such as Figures 1 to 3 As shown, the pressure relief groove 202 is disposed on the cover 20 near the first electrode tab 301 and / or the second electrode tab 302;

[0066] Or / and, the pressure relief groove 202 is disposed on the housing 10 near the first electrode 301 or / and the second electrode 302.

[0067] Specifically, the pressure relief groove 202 can be disposed at any position on the cover 20 and / or the housing 10. Since there is a greater amount of gas generated near the first tab 301 and the second tab 302 of the battery cell 30, in this embodiment, the pressure relief groove 202 is disposed on the cover 20 and / or the housing 10 near the first tab 301 and / or the second tab 302 to facilitate pressure relief. For example, the cover 20 has two arc-shaped pressure relief grooves 202 near the first tab 301, and / or two arc-shaped pressure relief grooves 202 near the second tab 302.

[0068] In some implementations, such as Figure 5As shown, a boss 203 is provided on the end face of the cover 20 near the housing 10, and the cover 20 is inserted and sealed with the housing 10 through the boss 203.

[0069] Specifically, the inner surface of the cover 20 has a boss 203 that protrudes towards one side of the housing 10. The boss 203 can be fitted into the open end of the housing 10 to make the housing 10 and the cover 20 seal together. The cover 20 and the housing 10 are welded together around the boss 203 to ensure the overall sealing of the battery housing assembly.

[0070] In a second aspect, this utility model provides a battery, the battery including a cell 30 and a battery housing assembly as described in any embodiment of this application, the cell 30 having a first tab 301 and a second tab 302 on opposite sides, the cell 30 being located within the receiving cavity 106, and the first tab 301 being connected to the terminal post 40 of the housing 10, and the second tab 302 being connected to the flange 201 on the cover 20.

[0071] Specifically, the battery provided in this application embodiment is suitable for assembling the battery cells 30 with tabs on both sides. The battery cells 30 are easy to assemble, and the second tab 302 directly passes through the through hole and connects to the flange 201, reducing the space occupied by the bending connection of the second tab 302 within the receiving cavity 106, improving the space utilization of the receiving cavity 106, and thus increasing the energy density of the battery. The specific technical features and effects of the battery are consistent with those of the battery casing assembly, and will not be repeated in this application embodiment. The battery can be a lithium-ion battery, etc.

[0072] In some implementations, such as Figures 8 to 12 As shown, the pole post 40 includes a base 401, and a first limiting member 402 and a second limiting member 403 are respectively provided on both sides of the base 401. The base 401 passes through the mounting hole 1010, and the first limiting member 402 and the second limiting member 403 respectively abut against the inner and outer surfaces of the first sidewall 101.

[0073] Specifically, the first limiting member 402, the base 401, and the second limiting member 403 can be integrally formed from the same metal material. The first limiting member 402 is located inside the first sidewall 101. The base 401 passes through the mounting hole 1010, extends out of the first sidewall 101, and is bent to form the second limiting member 403. The first limiting member 402 and the second limiting member 403 respectively abut against the inner and outer surfaces of the first sidewall 101 to achieve a fixed connection between the pole post 40 and the first sidewall 101. The shapes of the first limiting member 402 and the second limiting member 403 can be set according to actual needs. For example, the first limiting member 402 can be a square plate, and the second limiting member 403 can be a circular plate. The inner side of the first sidewall 101 refers to the side closer to the receiving cavity 106, and the outer side of the first sidewall 101 refers to the side away from the receiving cavity 106.

[0074] In some implementations, such as Figures 8 to 12 As shown, a sealing element 50 is provided in the mounting hole 1010, a first insulating element 60 is provided between the first limiting element 402 and the first side wall 101, and a second insulating element 70 is provided between the second limiting element 403 and the first side wall 101. The base 401 passes through the first insulating element 60, the first mounting hole 1010 and the second insulating element 70 in sequence.

[0075] Specifically, the sealing element 50 can be made of rubber and is installed in the mounting hole 1010. The base 401 is connected to the first sidewall 101 through the sealing element 50, so that the outer surface of the base 401 is insulated from the first sidewall 101. The first insulating element 60 is an insulating plate and is located between the first limiting element 402 and the first sidewall 101. The area of ​​the first insulating element 60 is larger than the area of ​​the first limiting element 402, so that the first limiting element 402 and the first sidewall 101 are insulated from each other. The second insulating element 70 is an insulating ring and is located between the second limiting element 403 and the first sidewall 101. The area of ​​the second insulating element 70 is larger than the area of ​​the second limiting element 403, so that the second limiting element 403 and the first sidewall 101 are insulated from each other. This insulates the pole post 40 from the first sidewall 101, preventing short circuits caused by the connection of the first pole tab 301 and the second pole tab 302.

[0076] In some implementations, such as Figures 8 to 12As shown, the substrate 401 has an injection hole 404 that passes through the first limiting member 402, the substrate 401 and the second limiting member 403 in sequence along its axial direction. The first limiting member 402 is located inside the first side wall 101, and the second limiting member 403 is located outside the first side wall 101. The second limiting member 403 has a limiting groove 405 that covers the injection hole 404, and a baffle 80 is installed in the limiting groove 405.

[0077] Specifically, the first limiting member 402, the base 401, and the second limiting member 403 are provided with injection holes 404. Electrolyte can be injected into the battery's receiving cavity 106 through the injection holes 404, avoiding the need for drilling holes in the casing 10 again. After the electrolyte injection is completed, the injection holes 404 can be sealed by installing a baffle 80 in the limiting groove 405, maintaining the overall airtightness of the battery.

[0078] A third aspect of this utility model is to provide an electrical device, which includes the battery described in any embodiment of this application.

[0079] Specifically, the technical features and effects of the electrical equipment are consistent with those of the battery casing assembly, and will not be repeated in the embodiments of this application.

[0080] It should be noted that electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This utility model embodiment does not impose any special limitations on the above-mentioned electrical equipment.

[0081] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A battery casing assembly, characterized in that, include: The housing (10) and the cover (20) covering the housing (10) form a receiving cavity (106) between the housing (10) and the cover (20), the receiving cavity (106) is used to place the battery cell (30), and the battery cell (30) has a first tab (301) and a second tab (302) on opposite sides. The housing (10) is provided with a pole post (40) connected to the first pole tab (301), and the cover (20) is provided with a flange (201) connected to the second pole tab (302).

2. The battery casing assembly according to claim 1, characterized in that, The housing (10) includes a first sidewall (101) and a second sidewall (102) disposed opposite to each other along a first direction; wherein, the first sidewall (101) is provided with a mounting hole (1010), and the pole post (40) is disposed in the mounting hole (1010); the second sidewall (102) is provided with a through opening (1020), and the second pole lug (302) passes through the through opening (1020) and connects to the flange (201).

3. The battery casing assembly according to claim 2, characterized in that, The width of the through-hole (1020) is greater than the width of the second electrode (302).

4. The battery casing assembly according to claim 2, characterized in that, The second sidewall (102) is recessed at the through opening (1020) towards the side close to the first sidewall (101) to form a groove (1021), the flange (201) is fitted into the groove (1021), and the outer surface of the flange (201) is flush with the end face of the second sidewall (102) away from the first sidewall (101).

5. The battery housing assembly according to claim 4, characterized in that, The area of ​​the flange (201) is larger than the area of ​​the through opening (1020), and the distance between the groove (1021) and the end face of the second sidewall (102) away from the first sidewall (101) is 0.3mm~1mm.

6. The battery housing assembly according to claim 2, characterized in that, The housing (10) further includes a third sidewall (103) and a fourth sidewall (104) disposed opposite to each other along a second direction, the second direction being intersected with the first direction; a face wall (105) is disposed on the same side of the first sidewall (101), the second sidewall (102), the third sidewall (103) and the fourth sidewall (104), and the first sidewall (101), the third sidewall (103), the second sidewall (102), the fourth sidewall (104) and the face wall (105) enclose to form a housing (10) having the receiving cavity (106).

7. The battery housing assembly according to claim 1, characterized in that, At least one pressure relief groove (202) is provided on the cover (20), the pressure relief groove (202) is located on the side end face of the cover (20) close to the housing (10), or / and, the pressure relief groove (202) is located on the side end face of the cover (20) away from the housing (10); Or / and, at least one pressure relief groove (202) is provided on the housing (10), the pressure relief groove (202) is located on the side end face of the housing (10) near the cover (20), or / and, the pressure relief groove (202) is located on the side end face of the housing (10) away from the cover (20).

8. The battery housing assembly according to claim 7, characterized in that, The pressure relief groove (202) is disposed on the cover (20) near the first electrode (301) and / or the second electrode (302); Or / and, the pressure relief groove (202) is disposed on the housing (10) near the first tab (301) or / and the second tab (302).

9. The battery casing assembly according to claim 1, characterized in that, The cover (20) has a boss (203) on one end face near the housing (10), and the cover (20) is inserted into and sealed with the housing (10) through the boss (203).

10. A battery, characterized in that, The battery includes a cell (30) and a battery housing assembly as described in any one of claims 1-9. The cell (30) has a first tab (301) and a second tab (302) on opposite sides. The cell (30) is located in the receiving cavity (106), and the first tab (301) is connected to the terminal post (40) of the housing (10), and the second tab (302) is connected to the flange (201) on the cover (20).

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