Housing assembly, battery and electric device

Abstract

The application provides a shell assembly, a battery and an electric device. The shell assembly comprises a first shell and a second shell, the first shell and the second shell are arranged along a first direction and form a receiving space. A protrusion is formed on the side of the first shell facing the second shell. Along a second direction, the protrusion has a first side and a second side, the first side is provided with a first protruding block, and the second side is provided with a second protruding block. The first protruding block is close to the receiving space, and the second protruding block is away from the receiving space. A recess is formed on the side of the second shell facing the first shell, and the protrusion is arranged in the recess. The first side and the recess form a first gap, and the second side and the recess form a second gap. An adhesive structure is arranged in the first gap and the second gap. The first direction, the second direction and a third direction are perpendicular to each other. The shell assembly, the battery and the electric device provided by the application can improve the sealing performance of the battery and improve the safety performance of the battery.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a shell assembly, a battery and an electric device. BACKGROUND

[0002] With the development of the new energy industry, batteries are widely used. The safety performance of a battery is a relatively important index of the battery.

[0003] The sealing performance of a battery is an important factor affecting the safety performance of the battery. Therefore, how to improve the sealing performance of the battery to improve the safety performance of the battery is a problem to be solved in the field. SUMMARY

[0004] The shell assembly, the battery and the electric device provided in the embodiments of the application can improve the sealing performance of the battery, thereby improving the safety performance of the battery.

[0005] In a first aspect, the embodiments of the application provide a shell assembly, wherein the shell assembly comprises a first shell and a second shell, the first shell and the second shell are arranged along a first direction and form a receiving space. The side of the first shell facing the second shell is formed with a protruding part, the protruding part has a first side and a second side, the first side is provided with a first protruding block, and the second side is provided with a second protruding block, the first protruding block is close to the receiving space, and the second protruding block is away from the receiving space. The side of the second shell facing the first shell is formed with a recessed part, and the protruding part is arranged in the recessed part; the first side and the recessed part form a first gap, the second side and the recessed part form a second gap, and the first gap and the second gap are provided with an adhesive structure.

[0006] The shell assembly provided in the embodiments of the application can increase the connection area between the first shell and the second shell by arranging the protruding part and the recessed part; the first protruding block is arranged on the first side of the protruding part, and the second protruding block is arranged on the second side of the protruding part, so that the first gap and the second gap are formed between the protruding part and the recessed part to arrange the adhesive structure, thereby improving the connection strength and the sealing performance between the first shell and the second shell, improving the sealing performance of the battery when the shell assembly is applied to the battery, and improving the safety performance of the battery.

[0007] The adhesive structure is formed after the solidification of the solidifiable insulating material, and the solidifiable insulating material can be glue.

[0008] In some embodiments, the length of the first protruding block is greater than the length of the second protruding block along the direction in which the protruding part and the recessed part are oppositely arranged.

[0009] In the direction in which the protruding part and the recessed part are oppositely arranged, the size of the first gap is greater than the size of the second gap, and when the glue is filled between the protruding part and the recessed part, if the amount of filled glue is too much, the glue is more likely to overflow from the first gap with the larger size, and the amount of overflow of the glue from the second gap is reduced.

[0010] In some embodiments, the first shell comprises a first base, and the protrusions protrude from the first base in the first direction;

[0011] The second shell comprises a second base, a first wall and a second wall, the first wall and the second wall protrude from the second base in the first direction, the first wall, the second wall and the second base form a concave portion, the protrusions are located between the first wall and the second wall, a first gap is formed between the protrusions and the first wall, and a second gap is formed between the protrusions and the second wall.

[0012] The second base, the first wall and the second wall are integrally formed.

[0013] In some embodiments, the first protrusions abut against the first wall, and the second protrusions abut against the second wall.

[0014] In some embodiments, the first protrusions and the second protrusions are alternately and spacedly arranged.

[0015] In some embodiments, the protrusions have a ring structure, an inner side of the ring structure is the first side of the protrusions, an outer side of the ring structure is the second side of the protrusions, and the first direction is an axial direction of the ring structure.

[0016] In some embodiments, in the direction in which the protrusions are located opposite to the concave portion, a length of the first protrusions is greater than a length of the first gap.

[0017] The first protrusions abut against the first wall, so that the protrusions at positions corresponding to the first protrusions are deformed in a direction away from the first wall, to form the first gap on both sides of the first protrusions.

[0018] In some embodiments, in the direction in which the protrusions are located opposite to the concave portion, a length of the second protrusions is greater than a length of the second gap.

[0019] The second protrusions abut against the second wall, so that the protrusions at positions corresponding to the second protrusions are deformed in a direction away from the second wall, to form the second gap on both sides of the second protrusions.

[0020] In some embodiments, in the direction in which the protrusions are located opposite to the concave portion, a side surface of the first protrusions away from the protrusions is in contact with the first wall, and the length of the first gap is equal to the length of the first protrusions.

[0021] In some embodiments, in the direction in which the protrusions are located opposite to the concave portion, a side surface of the second protrusions away from the protrusions is in contact with the second wall, and the length of the second gap is equal to the length of the second protrusions.

[0022] By means of the first protrusions and the second protrusions, the relative positions between the protrusions, the first wall and the second wall are maintained, and the protrusions are prevented from shaking between the first wall and the second wall in the direction in which the protrusions are located opposite to the concave portion.

[0023] In some embodiments, a plurality of first protrusions are provided, and the first protrusions are arranged at intervals in the third direction on the first side of the convex portion.

[0024] In some embodiments, the distance between two adjacent first protrusions is less than or equal to 80 mm.

[0025] In some embodiments, a plurality of second protrusions are provided, and the second protrusions are arranged at intervals on the second side of the convex portion.

[0026] In some embodiments, the distance between two adjacent second protrusions is less than or equal to 80 mm.

[0027] In some embodiments, in the direction in which the convex portion is arranged opposite to the concave portion, the distance between the projection of the first protrusion on the convex portion and the projection of the closest second protrusion on the convex portion is less than or equal to 5 mm.

[0028] By means of the plurality of first protrusions and the plurality of second protrusions, the relative positions between the convex portion and the concave portion having the annular structure are maintained, so that uniform first gaps and second gaps are formed between the convex portion and the concave portion. After the adhesive structure is arranged in the first gaps and the second gaps, the connection strength and the sealing performance at each position between the convex portion and the concave portion are improved.

[0029] In some embodiments, the length of the first protrusion is 3 mm to 8 mm.

[0030] In some embodiments, the length of the second protrusion is 3 mm to 8 mm.

[0031] By means of the first protrusion and the second protrusion, the first gap and the second gap can be respectively formed on both sides of the convex portion in the direction in which the convex portion is arranged opposite to the concave portion, so as to arrange the adhesive structure.

[0032] In some embodiments, the first protrusion has a first surface and a second surface connected to each other, the first surface is parallel to the side surface of the first wall portion facing the convex portion, the second surface is connected to the side of the first surface away from the first base portion, and the second surface is arranged obliquely away from the first wall portion.

[0033] The second surface can guide the convex portion in the process of inserting the convex portion into the concave portion, so that the convex portion is smoothly inserted into the concave portion.

[0034] In some embodiments, the second protrusion has a third surface and a fourth surface connected to each other, the third surface is parallel to the side surface of the second wall portion facing the convex portion, the fourth surface is connected to the side of the third surface away from the first base portion, and the fourth surface is arranged obliquely away from the second wall portion.

[0035] The fourth surface can guide the convex portion in the process of inserting the convex portion into the concave portion, so that the convex portion is smoothly inserted into the concave portion.

[0036] In some embodiments, the first shell includes four first side walls and a first bottom wall, and forms a first space, each of the first side walls includes a first base and a protrusion;

[0037] The second shell includes four second side walls and a second bottom wall, and forms a second space, each of the second side walls includes a second base, a first wall portion and a second wall portion, the first space and the second space are communicated to form a receiving space.

[0038] In some embodiments, the bonding structure is formed by a solidifiable insulation material in the first gap and the second gap.

[0039] In a second aspect, the embodiments of the present application further provide a battery, wherein the battery includes a cell module and the shell assembly as in the first aspect, the cell module is arranged in the interior of the shell assembly, and the shell is used for protecting the cell module.

[0040] In some embodiments, the cell module includes a plurality of cells arranged along a second direction or a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0041] When each of the cells expands, the direction of the force applied to the shell assembly by each of the cells is the second direction or the third direction, which can reduce the case that the bonding between the first shell and the second shell fails due to the force from the first direction when the cells expand.

[0042] In a third aspect, the embodiments of the present application further provide a power consuming device, wherein the power consuming device includes the battery as in the second aspect, and the battery is used for providing electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application.

[0044] Figure 1 FIG. 1 is a structural schematic diagram of a battery according to an embodiment of the present application;

[0045] Figure 2 FIG. 2 is an exploded view of the battery according to the embodiment of the present application;

[0046] Figure 3 FIG. 3 is a sectional view of the battery according to the embodiment of the present application;

[0047] Figure 4 FIG. 4 is an enlarged schematic diagram of position A in FIG. 1; Figure 3

[0048] Figure 5 ​Structure diagram of a shell assembly without an adhesive structure according to an embodiment of the present application;

[0049] Figure 6 Structure diagram of a first shell of a shell assembly according to an embodiment of the present application; Figure 5 Enlarged diagram at B;

[0050] Figure 7 Structure diagram of a second shell of a shell assembly according to an embodiment of the present application;

[0051] Figure 8 Structure diagram of a second shell of a shell assembly according to an embodiment of the present application;

[0052] Figure 9 Enlarged diagram at C; Figure 7 Enlarged diagram at D;

[0053] Figure 10 Structure diagram of a battery according to an embodiment of the present application; Figure 7 Enlarged diagram at E;

[0054] Figure 11 Structure diagram of a battery according to an embodiment of the present application;

[0055] Figure 12 Structure diagram of a battery according to an embodiment of the present application; Figure 11 Structure diagram of a battery according to an embodiment of the present application;

[0056] Figure 13 Structure diagram of a battery according to an embodiment of the present application;

[0057] Figure 14 Structure diagram of a battery according to an embodiment of the present application;

[0058] Figure 15 Structure diagram of a battery according to an embodiment of the present application;

[0059] Brief Description of the Drawings:

[0060] 1. first shell; 11. first side wall; 110. first space; 111. first base; 1121. first protrusion; 11211. first surface; 11212. second surface; 1122. second protrusion; 11221. third surface; 11222. fourth surface; 113. protrusion; 1131. first side; 1132. second side; 12. first bottom wall; 2. second shell; 21. second side wall; 210. second space; 211. second base; 212. first wall portion; 213. second wall portion; 214. recess; 22. second bottom wall; 23. first gap; 24. second gap; S. adhesive structure;

[0061] 3, cell module; 31, cell; 311, cell housing; 3111, first part; 31111, first side; 3112, second part; 31121, first sealing part; 31122, second sealing part; 31123, third sealing part; 312, electrode assembly; 313, electrode terminal;

[0062] 4, circuit board;

[0063] X, first direction;

[0064] Y, second direction;

[0065] Z, third direction. DETAILED DESCRIPTION

[0066] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some, but not all of the embodiments of the present application.

[0067] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover not exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0068] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] In the embodiments of the present application, "parallel" not only includes the case of absolute parallel, but also includes the case of approximate parallel which is commonly recognized in engineering; at the same time, "perpendicular" not only includes the case of absolute perpendicular, but also includes the case of approximate perpendicular which is commonly recognized in engineering. Exemplarily, the included angle between two directions is 80° to 90°, which can be considered as perpendicular; the included angle between two directions is 0° to 10°, which can be considered as parallel.

[0070] The shell assembly, battery and electric device of the present application are described below with reference to the accompanying drawings.

[0071] As shown in Figures 1 to 8 The shell assembly provided by the embodiments of the present application includes a first shell 1 and a second shell 2, which are arranged and connected along a first direction X. A receiving space is formed between the first shell 1 and the second shell 2 for accommodating a battery cell module 3 or other functional components. The side of the first shell 1 facing the second shell 2 is formed with a protrusion 113, and the side of the second shell 2 facing the second shell 2 is provided with a recess 214, and the protrusion 113 is arranged in the recess 214.

[0072] In some embodiments, the first shell 1 includes two first side walls 11 arranged opposite to each other along a second direction Y, each of the first side walls 11 including a first base 111 and a protrusion 113, and the second shell 2 includes two second side walls 21 arranged opposite to each other along the second direction Y, each of the second side walls 21 including a recess 24. The second direction Y is the direction in which the protrusions 113 and the recesses 24 are spaced apart, and the second direction Y is perpendicular to the first direction X.

[0073] In some embodiments, the first shell 1 includes four first side walls 11, two of which are arranged opposite to each other along a second direction Y, and the other two of which are arranged opposite to each other along a third direction Z, each of the first side walls 11 including a first base 111 and a protrusion 113. The second shell 2 includes four second side walls 21, two of which are arranged opposite to each other along the second direction Y, and the other two of which are arranged opposite to each other along the third direction Z, each of the second side walls 21 including a recess 24. Among them, the direction in which part of the protrusions 113 and the recesses 24 are spaced apart is the second direction Y, and the direction in which part of the protrusions 113 and the recesses 24 are spaced apart is the third direction Z. The present specification describes an example in which the protrusions 113 are arranged in the first side walls 11 arranged opposite to each other along the second direction Y.

[0074] In some embodiments, the protrusion 113 has a first side 1131 and a second side 1132, the first side 1131 being close to the receiving space, and the second side 1132 being away from the receiving space. The first side 1131 is provided with a first protruding block 1121, and the second side 1132 is provided with a second protruding block 1122. The first protruding block 1121 and the protrusion 113 are integrally formed, and the second protruding block 1122 and the protrusion 113 are integrally formed, which are formed by stamping, etching, casting, injection molding and the like.

[0075] In some embodiments, along the second direction Y, the first side 1131 and the second housing 2 form a first gap 23, the first gap 23 is provided with a bonding structure S, the bonding structure S bonds and fixes the protrusion 113 and the recess 214. Optionally, the bonding structure S is formed by the curable insulating material provided in the first gap 23 and cured. The bonding strength and sealing performance between the first housing 1 and the second housing 2 can be improved. Optionally, the curable insulating material is glue, by providing the first gap 23, the overflow of the glue on both sides of the housing assembly along the second direction Y can be reduced. Optionally, the glue includes polyurethane AB glue. Optionally, the glue includes acrylic AB glue.

[0076] In some embodiments, along the second direction Y, the second side 1132 and the second housing 2 form a second gap 24, the second gap 24 is provided with a bonding structure S, the bonding structure S bonds and fixes the protrusion 113 and the recess 214. Optionally, the bonding structure S is formed by the curable insulating material provided in the second gap 24 and cured. The bonding strength and sealing performance between the first housing 1 and the second housing 2 can be improved. Optionally, the curable insulating material is glue, by providing the second gap 24, the overflow of the glue on both sides of the housing assembly along the second direction Y can be reduced. Optionally, the glue includes polyurethane AB glue. Optionally, the glue includes acrylic AB glue.

[0077] In some embodiments, along the second direction Y, there is a gap between the position where the protrusion 113 is provided with the first protrusion 1121 and the recess 214, the gap is provided with a bonding substance, which improves the bonding strength and sealing performance between the first housing 1 and the second housing 2.

[0078] In some embodiments, along the second direction Y, the first protrusion 1121 abuts against the recess 214, the position where the protrusion 113 is provided with the first protrusion 1121 is deformed to protrude towards the second side 1132, which limits the flow of the curable insulating material to the second side 1132 and reduces the overflow of the curable insulating material outside the housing. The force formed between the protrusion 113 and the recess 214 further limits the flow of the curable insulating material to the second side 1132.

[0079] In some embodiments, along the second direction Y, there is a gap between the position where the protrusion 113 is provided with the second protrusion 1122 and the recess 214, the gap is provided with a bonding substance, which further improves the bonding strength and sealing performance between the first housing 1 and the second housing 2.

[0080] In some embodiments, along the second direction Y, the second protrusion 1122 abuts against the recess 214, the protrusion 113 is deformed to protrude towards the first side 1131 at the position where the second protrusion 1122 is arranged, limiting the flow of the curable insulating material towards the first side 1131, and limiting the overflow of the curable insulating material inside the housing. The force formed between the protrusion 113 and the recess 214 further limits the flow of the curable insulating material towards the first side 1131. Optionally, the bonding structure S is formed after the curable insulating material is cured

[0081] In some embodiments, along the second direction Y, the length L1 of the first protrusion 1121 is greater than the length L2 of the second protrusion 1122. The length D1 of the first gap 23 along the second direction Y is greater than the length D2 of the second gap 24 along the second direction Y, which is beneficial for the flow of the glue from the first gap 23 with a greater length, can reduce the overflow amount of the glue from the second gap 24, and can improve the appearance of the outside of the housing assembly.

[0082] In some embodiments, the first housing 1 includes four first side walls 11 and a first bottom wall 12, the four first side walls 11 form a frame-shaped structure, and each first side wall 11 is fixedly connected to the first bottom wall 12. The four first side walls 11 and the first bottom wall 12 form a first space 110. Each first side wall 11 includes a first base 111 and a protrusion 113, the protrusion 113 protrudes from the first base 111 towards the second housing 2 along the first direction X, the first protrusion 1121 is arranged on the side of the protrusion 113 close to the accommodation space, and the second protrusion 1122 is arranged on the side of the protrusion 113 away from the accommodation space. The protrusions 113 formed on two adjacent first side walls 11 are connected. Along the second direction Y, the length D3 of the protrusion 113 is less than the length D4 of the first side wall 11.

[0083] In some embodiments, the first housing 1 can be formed by injection molding of insulating material, and the first base 111 and the protrusion 113 are integrally formed.

[0084] In some embodiments, the second housing 2 comprises four second side walls 21 and a second bottom wall 22, the four second side walls 21 are arranged to form a frame structure, and each second side wall 21 is fixedly connected with the second bottom wall 22, the four second side walls 21 and the second bottom wall 22 form a second space 210, the first space 110 and the second space 210 are communicated to form the accommodation space. Each second side wall 21 comprises a second base 211, a first wall 212 and a second wall 213, the first wall 212 and the second wall 213 protrude from the second base 211 towards one side of the first housing 1 along the first direction X, and the first wall 212, the second wall 213 and the second base 211 form a recess 214, the protrusion 113 is located between the first wall 212 and the second wall 213, the first gap 23 is formed between the protrusion 113 and the first wall 212, the second gap 24 is formed between the protrusion 113 and the second wall 213, and the recesses 214 formed on the two second side walls 21 are connected and communicated. Along the second direction Y, the length D5 of the first wall 212 is less than the length D7 of the second side wall 21, and the length D6 of the second wall 213 is less than the length D7 of the second side wall 21.

[0085] In some embodiments, the second housing 2 can be formed by injection molding of insulating material, and the second base 211, the first wall 212 and the second wall 213 are integrally formed.

[0086] Optionally, along the first direction X, the length L3 of the protrusion 113 is less than the length L4 of the first wall 212, and the length L3 of the protrusion 113 is less than the length L5 of the second wall 213, and along the first direction X, the gap is formed between the protrusion 113 and the second side wall 2 to accommodate the bonding structure S, thereby improving the bonding strength and sealing performance between the first housing 1 and the second housing 2.

[0087] Optionally, the length L4 of the first wall 212 is equal to the length L5 of the second wall 213, which is beneficial to further improve the bonding strength and sealing performance between the first housing 1 and the second housing 2.

[0088] Optionally, along the first direction X, the length L4 of the first wall 212 is less than the length L5 of the second wall 213, which is beneficial to overflow of the glue from the first gap 23 to the inside of the housing, thereby improving the appearance of the outside of the housing assembly.

[0089] In some embodiments, the first protrusions 1121 are provided in plurality and are spaced apart. Optionally, the first protrusions 1121 are uniformly spaced apart. The relative positions between the protrusion 113 and the first wall portion 212 can be defined by the plurality of first protrusions 1121. Optionally, the distance between two adjacent first protrusions 1121 is less than or equal to 80 mm, improving the bonding strength and sealing performance between the first housing 1 and the second housing 2. Optionally, the distance between two adjacent first protrusions 1121 is 60 mm to 80 mm, further improving the bonding strength and sealing performance between the first housing 1 and the second housing 2.

[0090] In some embodiments, the second protrusions 1122 are provided in plurality and are spaced apart along the third direction Z. Optionally, the second protrusions 1122 are uniformly spaced apart. The relative positions between the protrusion 113 and the second wall portion 213 can be defined by the plurality of second protrusions 1122. Optionally, along the third direction Z, the distance between two adjacent second protrusions 1122 is less than or equal to 80 mm, improving the bonding strength and sealing performance between the first housing 1 and the second housing 2. Optionally, along the third direction Z, the distance between two adjacent second protrusions 1122 is 60 mm to 80 mm, further improving the bonding strength and sealing performance between the first housing 1 and the second housing 2.

[0091] In some embodiments, the first protrusions 1121 and the second protrusions 1122 are alternately and spaced apart along the third direction Z. At least one of the first side 1131 and the second side 1132 of each position of the protrusion 113 along the third direction Z is provided with the bonding structure S, so that the protrusion 113 is bonded and fixed with the recess 214 at each position along the third direction Z, improving the connection strength and sealing performance between the first housing 1 and the second housing 2.

[0092] In some embodiments, the first housing 1 is provided with a reinforcing rib structure at a position close to the protrusion 113, and the distance between two adjacent first protrusions 1121 is less than or equal to 40 mm.

[0093] In some embodiments, along the third direction Z, the length S1 of the first protrusion 1121 is 3 mm to 8 mm, reinforcing the bonding strength and sealing performance between the first housing 1 and the second housing 2. Optionally, along the third direction Z, the length of the first protrusion 1121 is 4 mm to 5 mm, further improving the bonding strength and sealing performance between the first housing 1 and the second housing 2, and reducing the overflow of the curable insulating material from the second gap 24.

[0094] In some embodiments, the length S2 of the second protrusion 1122 along the third direction Z is 3mm to 8mm, which strengthens the bonding strength and sealing performance between the first shell 1 and the second shell 2. Optionally, the length of the second protrusion 1122 along the third direction Z is 4mm to 5mm, which further strengthens the bonding strength and sealing performance between the first shell 1 and the second shell 2, and reduces the overflow of the curable insulating material from the second gap 24.

[0095] In some embodiments, the first protrusion 1121 has a first surface 11211 and a second surface 11212 connected to each other along the third direction Z, the first surface 11211 is parallel to the side surface of the first wall portion 212 facing the protrusion 113, and the second surface 11212 is connected to the side of the first surface 11211 away from the first base portion 111, and the second surface 11212 is inclined away from the first wall portion 212, which can guide the protrusion 113 during the process of inserting the protrusion 113 into the recess 214, and facilitate the smooth insertion of the protrusion 113 into the recess. Optionally, the second surface 11212 is a plane or an arc surface.

[0096] In some embodiments, the second protrusion 1122 has a third surface 11221 and a fourth surface 11222 connected to each other along the third direction Z, the third surface 11221 is parallel to the side surface of the second wall portion 213 facing the protrusion 113, and the fourth surface 11222 is connected to the side of the third surface 11221 away from the first base portion 111, and the fourth surface 11222 is inclined away from the second wall portion 213, which can guide the protrusion 113 during the process of inserting the protrusion 113 into the recess 214, and facilitate the smooth insertion of the protrusion 113 into the recess 214. Optionally, the fourth surface 11222 is a plane or an arc surface.

[0097] In some embodiments, the battery further comprises a plurality of the battery cells 31 along the second direction Y, and each battery cell 31 exerts a force on the shell assembly in the second direction Y when swelling, which can reduce the case that the bonding between the first shell 1 and the second shell 2 fails due to the force in the first direction X when the battery cell 31 swells.

[0098] In some embodiments, the battery further comprises a plurality of the battery cells 31 along the second direction Y, and each battery cell 31 exerts a force on the shell assembly in the second direction Y when swelling, which can reduce the case that the bonding between the first shell 1 and the second shell 2 fails due to the force in the first direction X when the battery cell 31 swells.

[0099] In some embodiments, the plurality of battery cells 31 are arranged in a third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. When the battery cells 31 expand, the battery cells 31 apply force to the housing assembly in the third direction Z, which reduces the risk of the first housing 1 and the second housing 2 being detached from each other due to the force applied in the first direction X.

[0100] As shown in FIG. 1, in some embodiments, the battery cell 31 includes a battery cell housing 311, an electrode assembly 312 and an electrode terminal 313. The electrode assembly 312 is accommodated in the battery cell housing 311. The interior of the battery cell housing 311 is also filled with electrolyte. The electrode assembly 312 includes a positive electrode plate, a negative electrode plate and a separator. The battery cell 31 can work by moving metal ions between the positive electrode plate and the negative electrode plate. One end of the electrode terminal 313 extends outside the battery cell housing 311 and is used to electrically connect with an external circuit. The other end of the electrode terminal 313 extends into the interior of the battery cell housing 311 and is used to electrically connect with the electrode assembly 312. The electrode terminal 313 is used to electrically connect the electrode assembly 312 with the external circuit to enable the battery cell 31 to be charged and discharged. Figures 13 to 15

[0101] The battery cell 31 can be a lithium ion battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, a magnesium ion battery cell or other types of battery cells. The embodiments of the present application are not limited in this regard.

[0102] Optionally, the battery cell 31 is a soft-pack battery cell 31.

[0103] Exemplarily, the battery cell housing 311 is made of an aluminum plastic film.

[0104] The battery cell housing 311 includes a first portion 3111 and a second portion 3112. The electrode assembly 312 is arranged in the interior of the first portion 3111. A part of the electrode terminal 313 is arranged in the interior of the first portion 3111 and connected to the electrode assembly 312. The other part of the electrode terminal 313 extends out of the battery cell housing 311.

[0105] The first portion 3111 of the battery cell housing 311 protects the electrode assembly 312. The electrode terminal 313 is used to electrically connect the electrode assembly 312 with other functional components outside the battery cell housing 311. The second portion 3112 defines the extension direction of the electrode terminal 313, which reduces the risk of the electrode terminal 313 being bent at the position where the electrode terminal 313 is connected to the electrode assembly 312.

[0106] Exemplarily, the electrode terminal 313 includes two electrode terminals 313. One of the electrode terminals 313 is used to electrically connect with the positive electrode plate. The other of the electrode terminals 313 is used to electrically connect with the negative electrode plate.

[0107] ​In some embodiments, the second part 3112 includes a first sealing part 31121, a second sealing part 31122 and a third sealing part 31123, the second sealing part 31122 and the third sealing part 31123 are respectively located on two sides of the first part 3111 in the second direction Y, the first part 3111 has a first side 31111 in the third direction Z, the first sealing part 31121 is located on the first side 31111 of the first part 3111 in the third direction Z, the first sealing part 31121 is connected to the second sealing part 31122 and the third sealing part 31123 respectively, another part of the electrode terminal 313 extends out of the first sealing part 31121, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0108] The first sealing part 31121, the second sealing part 31122 and the third sealing part 31123 cooperate to seal the first part 3111, so that the inside of the first part 3111 forms a closed space for accommodating the electrode assembly 312, and effectively seals and protects the electrode assembly 312.

[0109] Optionally, in some embodiments, the battery further includes a circuit board 4, and the electrode terminal 313 is connected to the circuit board 4, such as being welded to the circuit board 4. The circuit board 4 and the cell shell 311 are oppositely arranged along the third direction Z. The circuit board 4 can include a BMS component (Battery Management System), and the BMS component includes a plurality of electronic components capable of realizing functions such as data acquisition, control, protection, communication, power calculation, signal transmission and power transmission of the battery cell 31. The circuit board 4 can be used to manage and maintain each battery cell 31, and realize control of charging and discharging of the battery cell 31.

[0110] In a third aspect, the embodiments of the present application also provide a power utilization device, wherein the power utilization device includes the battery of the second aspect, and the battery is used to provide electric energy.

[0111] The battery can be the battery provided in any of the above embodiments.

[0112] The power utilization body is capable of realizing a set function under the driving of electric energy. The power utilization device can be a portable device, a notebook computer, an electric toy and an electric tool, an energy storage system and the like. The electric tool includes a metal cutting electric tool, a cleaning tool and the like, for example, an electric drill, an electric wrench, a dust collector, a sweeping robot and the like. The embodiments of the present application do not specially limit the above power utilization device.

[0113] Although the present application has been described with reference to preferred embodiments, it is to be understood that various modifications can change the scope of the present application to the full extent that equivalents, under the doctrine of equivalents to the full extent indicated by the doctrine of equivalents, are permissible. Furthermore, it is to be understood that the scope of the present application is not limited to the particular embodiments disclosed herein but covers modifications obvious to those skilled in the art within the scope of the present application.

Claims

1. A housing assembly, characterized by, The shell assembly comprises a first shell and a second shell arranged along a first direction and forming a receiving space; The first shell is formed with a protrusion on a side facing the second shell, the protrusion has a first side and a second side, the first side is provided with a first protruding block, and the second side is provided with a second protruding block, the first protruding block is close to the receiving space, and the second protruding block is away from the receiving space; The second shell is formed with a recess on a side facing the first shell, the protrusion is arranged in the recess, the first side and the recess form a first gap, the second side and the recess form a second gap, and the first gap and the second gap are provided with an adhesive structure; The first protruding block is in abutment with the recess, and the protrusion is deformed to protrude towards the second side at a position where the first protruding block is arranged; The second protruding block is in abutment with the recess, and the protrusion is deformed to protrude towards the first side at a position where the second protruding block is arranged.

2. The housing assembly of claim 1, wherein, The length of the first protruding block is greater than the length of the second protruding block along a direction in which the protrusion and the recess are arranged oppositely.

3. The housing assembly of claim 1, wherein, The first shell comprises a first base, and the protrusion protrudes from the first base along the first direction; The second shell comprises a second base, a first wall and a second wall, the first wall and the second wall protrude from the second base along the first direction, the first wall, the second wall and the second base form the recess, the protrusion is arranged between the first wall and the second wall, the first gap is formed between the protrusion and the first wall, and the second gap is formed between the protrusion and the second wall.

4. The housing assembly of claim 3, wherein, The first protruding block is in abutment with the first wall, and the second protruding block is in abutment with the second wall.

5. The housing assembly of claim 3, wherein, The first protruding block and the second protruding block are alternately and spacedly arranged.

6. The housing assembly of claim 3, wherein, The first protruding block has a first surface and a second surface connected to each other, the first surface is parallel to a side surface of the first wall facing the protrusion, the second surface is connected to a side of the first surface away from the first base, and the second surface is arranged to be inclined away from the first wall.

7. The housing assembly of claim 3, wherein, The second protruding block has a third surface and a fourth surface connected to each other, the third surface is parallel to a side surface of the second wall facing the protrusion, the fourth surface is connected to a side of the third surface away from the first base, and the fourth surface is arranged to be inclined away from the second wall.

8. The housing assembly of claim 3, wherein, The first shell comprises four first side walls and a first bottom wall, and forms a first space, each first side wall comprises a first base and a protrusion; The second shell comprises four second side walls and a second bottom wall, and forms a second space, each second side wall comprises a second base, a first wall and a second wall, and the first space and the second space are connected to form the receiving space.

9. The housing assembly of any one of claims 1 to 8, wherein, The adhesive structure is arranged in the first gap and the second gap by means of a solidifiable insulating material.

10. A battery, characterized by The battery comprises a cell module and the shell assembly according to any one of claims 1 to 9, and the cell module is arranged in the interior of the shell assembly.

11. The battery of claim 10, wherein, The battery cell module comprises a plurality of battery cells arranged along a second direction or a third direction, the second direction and the third direction being perpendicular to each other.

12. An electrical device, characterized by The electric device comprises the battery as claimed in claim 10 or 11, the battery being used to provide electric energy.

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