Battery, battery pack, battery pack and electric equipment

Abstract

The utility model discloses a battery, battery pack, battery pack and electric equipment, battery includes shell and at least one pole subassembly, shell includes shell body, first cover body and second cover body, first cover body and second cover body are respectively provided the two sides of shell body, first cover body, shell body and second cover body define the cavity together, the cavity is sealed in the cavity. A groove is formed in the surface of one side, far away from the cavity, of at least one of the first cover body, the shell body and the second cover body; the end face of one end, far away from the cavity, of the pole assembly does not protrude out of the surface, correspondingly provided with the groove, of the pole assembly. According to the battery disclosed by the utility model, the battery can be manufactured to be thinner or small, the flatness of the surface of the shell is also improved, and the assembly of the shell and other parts is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery, a battery pack, a battery package and an electrical device. Background Art

[0002] Batteries are the power source for vehicle systems and have always been regarded as a landmark technology in the development of electric vehicles. Their performance is directly related to the vehicle's range.

[0003] In the related art, the pole of the battery is usually arranged on the circumferential side or upper side of the battery shell, and the end of the pole away from the battery cell will protrude from the outer surface of the shell, which is not conducive to the assembly of the shell and other components. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery that can be made thinner or smaller, and also improves the flatness of the shell surface, which is conducive to the assembly of the shell and other components.

[0005] The second objective of the present invention is to provide a battery pack using the above-mentioned battery.

[0006] The third objective of the present utility model is to provide a battery pack using the above-mentioned battery.

[0007] The fourth objective of the present utility model is to provide an electrical device using the above-mentioned battery, or the above-mentioned battery group, or the above-mentioned battery pack.

[0008] According to the battery of the first embodiment of the utility model, the shell comprises: a shell, the shell comprises a shell body, a first cover body and a second cover body, the first cover body and the second cover body are respectively arranged on both sides of the shell body, the first cover body, the shell body and the second cover body jointly define a cavity, and a groove is formed on the surface of a side away from the cavity of at least one of the first cover body, the shell body and the second cover body; at least one pole assembly, the pole assembly is arranged in the groove, and an end face of the pole assembly away from the cavity does not protrude from the surface of the pole assembly corresponding to the groove.

[0009] According to the battery of the utility model, the structure of the shell and the groove is simple, thereby improving the production rate of the shell and the groove, and further improving the production efficiency of the battery. In addition, by the separate arrangement of the main body, the first cover body and the second cover body, the processing accuracy of the main body, the first cover body and the second cover body is improved, and it is also convenient to install components such as battery cells in the cavity of the shell. In addition, it is convenient to make the battery thinner or smaller, and the flatness of the shell surface is improved, which is beneficial to the assembly of the shell and other components, thereby improving the aesthetics of the battery. Moreover, in the battery pack or battery package, the consistency and strength of the battery pack or battery package structure are improved.

[0010] According to some embodiments of the present invention, the groove is formed on a surface of the first cover body on one side away from the second cover body.

[0011] According to some embodiments of the present invention, the groove is located at one end of the first cover body in the length direction, and the length of the groove in the width direction of the first cover body is smaller than the width of the first cover body.

[0012] According to some embodiments of the present invention, a side surface of the first cover body facing the cavity protrudes in a direction away from the cavity to form a protrusion, and a part of the side surface of the protrusion constitutes a side wall of the groove.

[0013] According to some embodiments of the present invention, the edge of the protrusion has an extension portion, a side surface of the extension portion away from the cavity is flush with the bottom wall of the groove, and the extension portion is connected to a side surface of the shell body facing the first cover body.

[0014] According to some embodiments of the present invention, the groove is formed on the first cover body, and the first cover body is an integrally formed part.

[0015] According to some embodiments of the present invention, a liquid injection hole is formed on the bottom wall of the groove, the liquid injection hole is communicated with the cavity, and the liquid injection hole is spaced apart from the pole assembly.

[0016] According to some embodiments of the present invention, openings are formed on both sides of the shell body in the height direction, and the first cover body and the second cover body are respectively arranged on the side of the corresponding opening away from the cavity and connected to the shell body.

[0017] According to some embodiments of the utility model, the battery also includes a battery cell, which is arranged in the cavity, and the pole assembly includes: a lead-out plate, which is arranged in the cavity and conductively connected to the battery cell, the lead-out plate is insulated and connected to the first cover body, and the lead-out plate is opposite to the groove; a pole, one end of the pole passes through the bottom wall of the groove and is conductively connected to the lead-out plate, the other end of the pole is located in the groove, and the pole is insulated and connected to the first cover body.

[0018] According to some embodiments of the utility model, the pole assembly also includes: a first insulating member, which is arranged between the lead-out plate and the first cover body; a second insulating member, which is arranged in the groove, and the one end of the pole passes through the second insulating member, the bottom wall of the groove, the first insulating member and is connected to the lead-out plate in sequence, and the other end of the pole is located on the side of the second insulating member away from the cavity.

[0019] According to some embodiments of the utility model, the side wall thickness of the shell body is d1, wherein d1 satisfies: 20μm≤d1≤500μm; and / or the thickness of the first cover body is d2, wherein d2 satisfies: 20μm≤d2≤500μm; and / or the thickness of the second cover body is d3, wherein d3 satisfies: 20μm≤d3≤500μm.

[0020] According to some embodiments of the present invention, the second cover body is a sheet-like structure.

[0021] According to some embodiments of the present invention, the first cover body and the shell body are welded at the edge, and the weld extends from a side surface of the first cover body away from the shell body into the shell body; and / or, the second cover body and the shell body are welded at the edge, and the weld extends from a side surface of the second cover body away from the shell body into the shell body.

[0022] A battery pack according to an embodiment of the second aspect of the utility model includes a battery according to an embodiment of the first aspect of the utility model.

[0023] A battery pack according to an embodiment of the third aspect of the utility model comprises a battery according to an embodiment of the first aspect of the utility model and a box, wherein the battery is accommodated in the box.

[0024] The electrical equipment according to the fourth aspect of the present invention comprises the battery according to the first aspect of the present invention, or the battery pack according to the second aspect of the present invention, or the battery pack according to the third aspect of the present invention.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is an exploded diagram of a battery according to an embodiment of the utility model;

[0028] Figure 2 is a schematic diagram of a first cover of a battery according to an embodiment of the utility model;

[0029] Figure 3 is a schematic diagram of a battery shell body according to an embodiment of the utility model;

[0030] Figure 4 is a schematic diagram of a second cover of a battery according to an embodiment of the utility model;

[0031] Figure 5 is an exploded view of a battery terminal assembly and a first cover according to an embodiment of the utility model;

[0032] Figure 6 It is an exploded view of the pole assembly and the first cover of the battery according to an embodiment of the utility model, wherein the first insulating member and the second insulating member are in an assembled state;

[0033] Figure 7 is a schematic diagram of a weld of a battery shell according to an embodiment of the utility model;

[0034] Figure 8 is a schematic diagram of a battery according to an embodiment of the utility model from another angle, wherein the shell body and the second cover body are integrally formed;

[0035] Fig. 9 is a schematic diagram of a battery according to an embodiment of the utility model from another angle, wherein the pole and the second insulating member are in an assembled state;

[0036] Fig.10 is a cross-sectional view of a battery according to an embodiment of the utility model;

[0037] Fig.11 yes Fig.10 An enlarged view of the circled section A.

[0038] Reference numerals:

[0039] 100. Battery;

[0040] 1. Shell; 11. Shell body; 111. Opening; 12. First cover; 13. Second cover;

[0041] 14. cavity; 15. groove; 151. liquid injection hole; 152. liquid injection hole cover;

[0042] 16. raised portion; 17. extended portion; 18. pressure relief valve;

[0043] 2. Pole assembly; 21. Lead-out sheet; 22. Pole;

[0044] 23. a first insulating member; 24. a second insulating member;

[0045] 3. Battery cell. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 11 The battery 100 according to the first embodiment of the utility model is described.

[0047] like Figure 1 As shown, a battery 100 according to an embodiment of the first aspect of the utility model comprises a housing 1 and at least one pole assembly 2 .

[0048] Specifically, the housing 1 includes a housing body 11, a first cover body 12 and a second cover body 13, the first cover body 12 and the second cover body 13 are respectively arranged on both sides of the housing body 11, the first cover body 12, the housing body 11 and the second cover body 13 jointly define a cavity 14, and a groove 15 is formed on a surface of at least one of the first cover body 12, the housing body 11 and the second cover body 13 on a side away from the cavity 14. For example, in Figure 1In the example, both the upper and lower sides of the shell body 11 are open, the first cover body 12 is located on the upper side of the shell body 11, the second cover body 13 is located on the lower side of the shell body 11, and the groove 15 is formed by being recessed in the direction of the cavity 14. When there is one groove 15, the groove 15 can be formed on the first cover body 12, or on the second cover body 13, or on the shell body 11. When there are two grooves 15, the two grooves 15 can be formed on the first cover body 12 and the second cover body 13, or on the first cover body 12 and the shell body 11, or on the second cover body 13 and the shell body 11. When there are three grooves 15, the grooves 15 can be formed on the first cover body 12, the second cover body 13 and the shell body 11, respectively. When the groove 15 is provided on the shell body 11, the groove 15 can be located on one side surface of the shell body 11 in the length direction. With such a configuration, the structure of the housing 1 is simple and convenient for production and processing, which helps to improve the production efficiency of the housing 1, and the structure of the groove 15 is also relatively simple, which helps to improve the production rate of the groove 15, thereby improving the production rate of the battery 100. In addition, by the separate configuration of the body 11, the first cover 12 and the second cover 13, the processing accuracy of the body 11, the first cover 12 and the second cover 13 is improved, and it is also convenient to install components such as the battery cell 3 in the cavity 14 of the housing 1. In addition, it is also convenient to set the number of grooves 15 according to actual usage, thereby improving the applicability of the housing 1.

[0049] Combination Fig.10 and Fig.11 , the pole assembly 2 is arranged in the groove 15, and the end surface of the pole assembly 2 away from the cavity 14 does not protrude from the surface of the pole assembly 2 corresponding to the groove 15. Fig.10 and Fig.11 In the example, the pole assembly 2 is arranged on the bottom wall of the groove 15, and the height of the pole assembly 2 in the groove 15 is not higher than the height of the side wall of the groove 15. Compared with the conventional technology in which the end face of the pole protrudes from the outer surface of the battery housing, this arrangement reduces the space occupied by the pole assembly 2, which is conducive to the assembly of the housing 1 and other components. In addition, it can avoid that the pole assembly 2 limits the height of the battery 100 (such as Fig.10 length in the up-down direction) or length (such as Fig.10 The length in the front-to-back direction of the battery 100 is reduced, thereby facilitating the production of a thinner or smaller battery 100. In addition, the surface of the housing 1 on the side where the pole assembly 2 is located is relatively flat, thereby improving the aesthetics of the battery 100. Moreover, in a battery pack or battery package, it is beneficial to neatly arrange multiple batteries 100, thereby improving the consistency and strength of the battery pack or battery package structure. It should be noted that in the description of the present utility model, the meaning of "multiple" is two or more.

[0050] According to the battery 100 of the utility model, the structure of the shell 1 and the groove 15 is simple, thereby improving the production rate of the shell 1 and the groove 15, and further improving the production efficiency of the battery 100. In addition, by the separate arrangement of the shell body 11, the first cover body 12 and the second cover body 13, the processing accuracy of the shell body 11, the first cover body 12 and the second cover body 13 is improved, and it is also convenient to install the battery cell 3 and other components in the cavity 14 of the shell 1. In addition, it is convenient to make the battery 100 thinner or smaller, and the flatness of the surface of the shell 1 is improved, which is conducive to the assembly of the shell 1 and other components, thereby improving the aesthetics of the battery 100. Moreover, in the battery pack or battery package, the consistency and strength of the battery pack or battery package structure are improved.

[0051] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The groove 15 is formed on the surface of the first cover body 12 on one side away from the second cover body 13. Figure 1 and Figure 2 In the example, the arrangement of the first cover 12 and the second cover 13 includes the following situations: First, the first cover 12 is located on the upper side of the shell body 11, and the second cover 13 is located on the lower side of the shell body 11. Second, the second cover 13 is located on the upper side of the shell body 11, and the first cover 12 is located on the lower side of the shell body 11 (not shown in the figure). As a result, the arrangement of the pole assembly 2 is facilitated, thereby reducing the difficulty of installing the pole assembly 2. Moreover, when the battery cell 3 of the battery 100 is arranged in the cavity 14, the difficulty of transfer welding of the battery cell 3 can be reduced. In addition, the battery 100 can be made thinner to a greater extent, which is beneficial to the use of the battery 100.

[0052] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The groove 15 is located in the length direction of the first cover 12 (for example, Figure 1 The groove 15 is disposed at one end of the first cover body 12 in the width direction (for example, Figure 1The length of the groove 15 in the left-right direction) is less than the width of the first cover body 12. For example, the arrangement of the groove 15 includes the following situations: First, the groove 15 is located at the front end of the first cover body 12, and along the left-right direction, the length of the groove 15 is less than the width of the first cover body 12, and the first cover body 12 is located on the upper side of the shell body 11. Second, the groove 15 is located at the rear end of the first cover body 12, and along the left-right direction, the length of the groove 15 is less than the width of the first cover body 12, and the first cover body 12 is located on the upper side of the shell body 11 (not shown in the figure). Third, the groove 15 is located at the front end of the first cover body 12, and along the left-right direction, the length of the groove 15 is less than the width of the first cover body 12, and the first cover body 12 is located on the lower side of the shell body 11 (not shown in the figure). Fourth, the groove 15 is located at the rear end of the first cover body 12, and along the left-right direction, the length of the groove 15 is less than the width of the first cover body 12, and the first cover body 12 is located on the lower side of the shell body 11 (not shown in the figure). The side of the groove 15 away from the center of the first cover 12 is open, and the side wall of the groove 15 is roughly "U"-shaped. Such a configuration facilitates the assembly of the pole assembly 2 and the battery cell 3, thereby improving the assembly efficiency of the battery 100. In addition, the area occupied by the groove 15 on the first cover 12 is reduced, and the outer surface of the first cover 12 is relatively neat, further improving the aesthetics of the battery 100, and is more conducive to the assembly of the housing 1 and other components.

[0053] Optionally, a plurality of grooves 15 are provided (not shown in the figure), and a plurality of pole assemblies 2 are provided (not shown in the figure), and the grooves 15 correspond one to one with the pole assemblies 2. Such a configuration makes it convenient to set a plurality of pole assemblies 2, such as positive poles and negative poles, according to actual conditions, thereby improving the performance of the battery 100.

[0054] According to some embodiments of the present invention, referring to Figure 2 The surface of the first cover 12 facing the cavity 14 protrudes in a direction away from the cavity 14 to form a protrusion 16, and a part of the side surface of the protrusion 16 constitutes the side wall of the groove 15. Figure 2 In the example, the configuration of the protrusion 16 includes the following situations: First, referring to Figure 2, a side surface of the first cover body 12 facing the cavity 14 protrudes in a direction away from the cavity 14 to form a protrusion 16, and the first cover body 12 is located on the upper side of the shell body 11. Second, a side surface of the first cover body 12 facing the cavity 14 protrudes in a direction away from the cavity 14 to form a protrusion 16, and the first cover body 12 is located on the lower side of the shell body 11 (not shown). The side surface of the protrusion 16 away from the cavity 14 is a plane, and a part of the side wall of the protrusion 16 constitutes the three side walls of the groove 15, and the side of the protrusion 16 facing the cavity 14 is recessed in a direction away from the cavity 14. With such a configuration, on the one hand, the structure of the protrusion 16 is simple and easy to form, which is conducive to the formation of the groove 15, thereby improving the production rate of the first cover body 12. On the other hand, the provision of the protrusion 16 increases the volume of the cavity 14 , thereby facilitating the placement of the battery cell 3 in the cavity 14 , improving the space utilization inside the shell 1 , reducing the difficulty of installing the battery cell 3 , and thereby increasing the installation rate of the battery 100 .

[0055] According to some embodiments of the present invention, referring to Figure 2 The edge of the protrusion 16 has an extension 17, and the side surface of the extension 17 away from the cavity 14 is flush with the bottom wall of the groove 15, and the extension 17 is connected to the shell body 11 facing the first cover 12. For example, in Figure 2 In the example, the extension 17 is arranged on the circumferential edge of the protrusion 16, and the extension 17 extends in a direction away from the center of the protrusion 16. For example, the setting of the extension 17 includes the following situations: First, the extension 17 is connected to the side surface of the shell body 11 facing the first cover 12, and the first cover 12 is located on the upper side of the shell body 11. Second, the extension 17 is connected to the side surface of the shell body 11 facing the second cover 13, and the first cover 12 is located on the lower side of the shell body 11 (not shown in the figure). Therefore, the setting of the extension 17 is conducive to the connection between the first cover 12 and the shell body 11, and the connection is firm, thereby reducing the difficulty of assembling the first cover 12 and the shell body 11, thereby improving the assembly efficiency of the battery 100. In addition, the side of the extension 17 away from the cavity 14 is flush with the bottom wall of the groove 15, which is conducive to reducing the difficulty of installing the pole assembly 2, thereby improving the assembly efficiency of the pole assembly 2. Moreover, the aesthetics of the groove 15 is improved, thereby improving the aesthetics of the battery 100.

[0056] According to some embodiments of the present invention, referring to Figure 2 , the groove 15 is formed on the first cover body 12, and the first cover body 12 is an integrally formed part. Figure 2In the example, the middle area of ​​the first cover 12 is stretched in the direction away from the cavity 14, and the area of ​​the first cover 12 where the groove 15 is located is not stretched. Such a configuration improves the structural strength of the first cover 12, thereby extending the service life of the first cover 12, and further extending the service life of the battery 100. In addition, the protective effect of the first cover 12 on the battery cell 3 of the battery 100 is also improved, thereby extending the service life of the battery cell 3. In addition, it is beneficial to the processing and molding of the first cover 12, thereby facilitating the production and processing of the battery 100.

[0057] According to some embodiments of the present invention, referring to Figure 2 A liquid injection hole 151 is formed on the bottom wall of the groove 15, and the liquid injection hole 151 is connected to the cavity 14, and the liquid injection hole 151 is spaced apart from the pole assembly 2. Figure 2 In the example, the injection hole 151 penetrates the bottom wall of the groove 15 in the up-down direction, that is, the injection hole 151 penetrates the first cover body 12 in the up-down direction. With such a configuration, electrolyte can be added to the interior of the battery 100 through the injection hole 151, which helps to reduce the difficulty of adding electrolyte to the battery 100, thereby improving the manufacturing efficiency of the battery 100. In addition, the injection hole 151 has a simple structure and is easy to produce and process, thereby improving the production efficiency of the first cover body 12. In addition, the injection hole 151 and the pole assembly 2 are arranged reasonably and do not interfere with each other, which is conducive to the normal use of the battery 100 and also makes the exterior of the battery 100 more concise and beautiful.

[0058] Further, refer to Figure 5 and Fig.10 , a liquid injection hole cover 152 is provided at the liquid injection hole 151. For example, Figure 5 and Fig.10 In the example, the injection hole cover 152 is matched with the injection hole 151, and the injection hole cover 152 can be used to cover the injection hole 151 to prevent leakage of electrolyte in the battery 100, thereby facilitating the normal use of the battery 100. In addition, the assembly operation of the injection hole cover 152 and the injection hole 151 is simple, thereby improving the assembly efficiency of the injection hole cover 152 and the injection hole 151.

[0059] According to some embodiments of the present invention, referring to Figure 1 and Figure 3 , the height direction of the shell body 11 (such as Figure 3 The first cover 12 and the second cover 13 are respectively arranged on the side of the corresponding opening 111 away from the cavity 14 and connected to the shell body 11. For example, in Figure 1 and Figure 3In the example, two openings 111 are formed, and the two openings 111 are formed on the upper side and the lower side of the shell body 11 respectively. The cross-sectional shape of the shell body 11 is roughly rectangular ring-shaped, and the shell body 11 surrounds the battery cell 3 of the battery 100 along the circumference of the battery 100. The edge of the lower side of the first cover body 12 is connected to the upper side of the shell body 11, and the first cover body 12 covers the opening 111 on the upper side of the shell body 11. The edge of the upper side of the second cover body 13 is connected to the lower side of the shell body 11, and the second cover body 13 covers the opening 111 on the lower side of the shell body 11. In this way, the shell body 11 has a simple structure and is easy to produce and process, thereby helping to improve the production rate of the shell body 11. In addition, it is convenient to connect the shell body 11 with the first cover body 12 and the second cover body 13, thereby improving the assembly efficiency of the shell 1.

[0060] According to some embodiments of the present invention, referring to Figure 5 The battery 100 further includes a battery cell 3 , which is disposed in the cavity 14 , and the pole assembly 2 includes a lead-out sheet 21 and a pole 22 .

[0061] Specifically, the lead-out tab 21 is disposed in the cavity 14 and is electrically connected to the battery cell 3. The lead-out tab 21 is insulated from the first cover 12 and is opposite to the groove 15. One end of the pole 22 passes through the bottom wall of the groove 15 and is electrically connected to the lead-out tab 21. The other end of the pole 22 is located in the groove 15 and is insulated from the first cover 12. Figure 5 In the example, the lead-out tab 21 is located at the lower side of the first cover 12, the lower end of the pole 22 passes through the bottom wall of the groove 15 and the lead-out tab 21 in sequence, the pole 22 is riveted to the first cover 12 and the lead-out tab 21, and the upper end of the pole 22 is located in the groove 15. For example, the pole 22 can be electrically connected to the positive pole tab (not shown) of the battery cell 3 to lead out the positive pole of the battery cell 3, and one of the first cover 12, the second cover 13 and the shell body 11 is electrically connected to the negative pole tab (not shown) of the battery cell 3 to lead out the negative pole of the battery cell 3.

[0062] Such a configuration strengthens the connection stability between the pole 22 and the first cover 12 and the lead-out tab 21, thereby preventing the pole 22 from falling off the first cover 12, thereby improving the stability of the pole assembly 2 in use, and further improving the safety of the battery 100 in use. In addition, the electrical connection between the pole 22 and the lead-out tab 21 and the first cover 12 can be avoided, thereby preventing the battery 100 from short-circuiting, which is beneficial to the normal use of the battery 100. In addition, it helps the battery 100 to form an electrical circuit, and further prevents the battery 100 from short-circuiting, so that the battery 100 can be used normally for a long time.

[0063] According to some embodiments of the present invention, referring to Figure 5The pole assembly 2 includes a first insulating member 23 and a second insulating member 24. The first insulating member 23 is disposed between the lead-out piece 21 and the first cover 12. The second insulating member 24 is disposed in the groove 15. One end of the pole 22 passes through the second insulating member 24, the inner wall of the groove 15, the first insulating member 23 and is connected to the lead-out piece 21 in sequence. The other end of the pole 22 is located on the side of the second insulating member 24 away from the cavity. For example, Figure 5 In the example, the first insulating member 23 is located between the lower side of the first cover 12 and the upper side of the lead-out piece 21, the second insulating member 24 is located on the upper side of the bottom wall of the groove 15, the pole 22 is roughly in a nail-like structure, the upper part of the pole 22 is roughly in a sheet-like structure, the lower part of the pole 22 is roughly in a cylindrical shape, the upper end of the pole 22 is located on the upper side of the second insulating member 24, the lower end of the pole 22 passes through the second insulating member 24, the bottom wall of the groove 15, the first insulating member 23 and the lead-out piece 21 in sequence, and the pole 22 is riveted to the second insulating member 24, the bottom wall of the groove 15, the first insulating member 23 and the lead-out piece 21. Thus, the first insulating member 23 insulates the lead-out piece 21 from the first cover 12, and the second insulating member 24 insulates the pole 22 from the first cover 12, thereby preventing the pole assembly 2 from short-circuiting with the first cover 12, and thus facilitating the normal use of the battery 100 for a long time. In addition, the second insulating member 24 also has a limiting effect on the upper end of the pole 22 , preventing the pole 22 from continuing to move downward under the action of gravity, thereby improving the use stability of the pole 22 .

[0064] Optionally, refer to Figure 6 , the first insulating member 23, the second insulating member 24 and the first cover 12 are integrally formed. Such a configuration further strengthens the connection strength between the first insulating member 23, the second insulating member 24 and the first cover 12, and prevents the first insulating member 23 and the second insulating member 24 from falling off the first cover 12, thereby providing a long-term and stable insulation effect, effectively preventing the pole assembly 2 from short-circuiting with the first cover 12, and thereby extending the service life of the battery 100. In addition, it is also conducive to the rapid assembly of the first cover 12 and the pole assembly 2, thereby improving the assembly efficiency of the battery 100.

[0065] According to some embodiments of the present invention, referring to Figure 3, the side wall thickness of the shell body 11 is d1, wherein d1 satisfies: 20μm≤d1≤500μm. For example, when the side wall thickness d1 of the shell body 11 is less than 20μm, the side wall thickness of the shell body 11 is small, and the side wall of the shell body 11 is prone to deformation or even rupture under special circumstances, thereby shortening the service life of the shell body 11, and also reducing the protective effect of the shell body 11 on the battery cell 3 of the battery 100, thereby shortening the service life of the battery 100. When the side wall thickness d1 of the shell body 11 is greater than 500μm, the material usage of the shell body 11 is increased, thereby increasing the production cost of the shell body 11, and also increasing the weight of the shell body 11, thereby increasing the production cost of the battery 100 and increasing the difficulty of transporting the battery 100. Therefore, by setting the side wall thickness d1 of the shell body 11 to satisfy 20 μm ≤ d1 ≤ 500 μm, the side wall of the shell body 11 is not easily deformed, thereby extending the service life of the shell body 11, and improving the protective effect of the shell body 11 on the battery cell 3 of the battery 100, thereby extending the service life of the battery 100. In addition, the material usage of the shell body 11 is reduced, thereby reducing the production cost of the shell body 11, and also reducing the weight of the shell body 11, thereby reducing the production cost of the battery 100 and reducing the difficulty of transporting the battery 100.

[0066] According to some further embodiments of the present invention, referring to Figure 2 , the thickness of the first cover 12 is d2, wherein d2 satisfies: 20μm≤d2≤500μm. For example, when the thickness d2 of the first cover 12 is less than 20μm, the thickness of the first cover 12 is small, and the first cover 12 is prone to deformation or even rupture under special circumstances, thereby shortening the service life of the first cover 12, and reducing the protective effect of the first cover 12 on the battery cell 3 of the battery 100, thereby shortening the service life of the battery 100. When the thickness d2 of the first cover 12 is greater than 500μm, the material usage of the first cover 12 is increased, thereby increasing the production cost of the first cover 12, and also increasing the weight of the first cover 12, increasing the volume of the shell 1, thereby increasing the production cost of the battery 100, and increasing the difficulty of transporting the battery 100. Therefore, by setting the thickness d2 of the first cover 12 to satisfy 20 μm ≤ d2 ≤ 500 μm, the first cover 12 is not easily deformed, thereby extending the service life of the first cover 12, and improving the protective effect of the first cover 12 on the battery cell 3 of the battery 100, thereby extending the service life of the battery 100. In addition, the material usage of the first cover 12 is reduced, thereby reducing the production cost of the first cover 12, and also reducing the weight of the first cover 12, thereby reducing the production cost of the battery 100 and reducing the difficulty of transporting the battery 100.

[0067] According to some other embodiments of the present invention, referring to Figure 4, the thickness of the second cover 13 is d3, wherein d3 satisfies: 20μm≤d3≤500μm. For example, when the thickness d3 of the second cover 13 is less than 20μm, the thickness of the second cover 13 is small, and the second cover 13 is prone to deformation or even rupture under special circumstances, thereby shortening the service life of the second cover 13, and also reducing the protective effect of the second cover 13 on the battery cell 3 of the battery 100, thereby shortening the service life of the battery 100. When the thickness d3 of the second cover 13 is greater than 500μm, the material consumption of the second cover 13 is increased, thereby increasing the production cost of the second cover 13, and also increasing the weight of the second cover 13, thereby increasing the production cost of the battery 100 and increasing the difficulty of transporting the battery 100. Therefore, by setting the thickness d3 of the second cover 13 to satisfy 20 μm ≤ d3 ≤ 500 μm, the second cover 13 is not easily deformed, thereby extending the service life of the second cover 13, and improving the protective effect of the second cover 13 on the battery cell 3 of the battery 100, thereby extending the service life of the battery 100. In addition, the material usage of the second cover 13 is reduced, thereby reducing the production cost of the second cover 13 and reducing the weight of the second cover 13, which is conducive to the lightweight design of the battery 100, thereby reducing the production cost of the battery 100 and reducing the difficulty of transporting the battery 100.

[0068] According to other embodiments of the present invention, Figure 2-Figure 4 , the side wall thickness of the shell body 11 is d1, the thickness of the first cover body 12 is d2, and the thickness of the second cover body 13 is d3, wherein d1, d2 and d3 respectively satisfy: 20μm≤d1≤500μm, 20μm≤d2≤500μm, 20μm≤d3≤500μm. As a result, the thickness of the shell body 11, the first cover body 12 and the second cover body 13 is moderate, and the shell 1 is not easy to deform, thereby extending the service life of the shell 1, and also improving the protective effect of the shell 1 on the battery cell 3 of the battery 100, thereby extending the service life of the battery 100. In addition, the material consumption of the shell 1 is reduced, thereby reducing the production cost of the shell 1, and also reducing the weight of the shell 1, thereby reducing the production cost of the battery 100, which is beneficial to the transportation of the battery 100.

[0069] Optionally, the housing 1 is a conductive alloy. The conductive alloy has good conductivity, so it is easy to carry current through the housing 1. In addition, the structural strength of the housing 1 is improved, which is conducive to the long-term and stable use of the housing 1, and also improves the protective effect of the housing 1 on the battery cell 3 of the battery 100, thereby extending the service life of the battery 100. For example, the housing 1 can be an iron alloy, an aluminum alloy or a stainless steel, but is not limited thereto.

[0070] According to some embodiments of the present invention, referring to Figure 4, the second cover 13 is a sheet structure. Therefore, the structure of the second cover 13 is simple and easy to produce, thereby improving the production rate of the second cover 13 and reducing the production cost of the second cover 13. In addition, the flatness of the upper and lower surfaces of the second cover 13 is improved, which is conducive to the neat arrangement of multiple battery cells 3 and multiple batteries 100, thereby improving the consistency and strength of the battery pack or battery package structure.

[0071] According to some embodiments of the present invention, referring to Figure 7 and Fig.10 , the first cover 12 and the shell body 11 are welded at the edge, and the weld extends from the side surface of the first cover 12 away from the shell body 11 to the inside of the shell body 11. And / or, the second cover 13 and the shell body 11 are welded at the edge, and the weld extends from the side surface of the second cover 13 away from the shell body 11 to the inside of the shell body 11.

[0072] For example, in Figure 7 and Fig.10 In the example, the extension 17 on the first cover body 12 is top-welded to the upper side of the shell body 11, that is, the weld passes through the extension 17 and the upper side of the shell body 11 in sequence from top to bottom and extends into the shell body 11. The circumferential edge of the second cover body 13 is top-welded to the lower side of the shell body 11, that is, the weld passes through the edge of the second cover body 13 and the lower side of the shell body 11 in sequence from bottom to top and extends into the shell body 11. The welding method can be ultrasonic welding, hot melt welding, brazing and laser welding. In this way, the welding can be completed in one time, thereby reducing the positioning accuracy requirements of the laser track, reducing the deformation of the first cover body 12 and the second cover body 13, and then reducing the difficulty of welding, which is conducive to improving the distribution of thermal deformation. Moreover, the phenomenon of welding through and slag retention is avoided, and short circuit is also avoided. In addition, the extension portion 17 forms a sealed weld with the upper side of the shell body 11, which helps to reduce the difficulty of welding, improves the sealing of the welding between the first cover body 12 and the shell body 11, and improves the sealing of the welding between the second cover body 13 and the shell body 11, thereby improving the sealing of the shell 1 of the battery 100 and facilitating the use of the battery 100.

[0073] Optionally, refer to Fig. 9 The shell body 11 and the second cover body 13 are integrally formed. Thus, the connection strength between the second cover body 13 and the shell body 11 is strengthened, and the connection sealing between the second cover body 13 and the shell body 11 is also improved, thereby improving the use performance of the housing 1.

[0074] Optionally, the first cover 12, the second cover 13 and the shell body 11 may be square or irregularly shaped. Thus, it is convenient for the first cover 12, the second cover 13 and the shell body 11 to be arranged according to actual conditions, and it is also convenient for the first cover 12, the second cover 13 and the shell body 11 to be closely matched to form the shell 1. The irregular shape may be "L" or "U", but is not limited thereto.

[0075] According to some optional embodiments of the present invention, the shell body 11 can be formed by bending or cutting a square tube, thereby facilitating the processing of the shell body 11, reducing the production difficulty of the shell body 11, and thus reducing the production cost of the shell body 11.

[0076] Optionally, refer to Figure 1 The first cover 12 is provided with a pressure relief valve 18, which can be completed by stamping and laser etching. Thus, when the gas pressure inside the battery 100 is too high and reaches a preset threshold, the gas inside the battery 100 can be released through the pressure relief valve 18, and the pressure relief valve 18 is used to relieve the pressure of the battery 100, so as to facilitate the normal use of the battery 100. In addition, it is also convenient to form the pressure relief valve 18, but it is not limited thereto.

[0077] A battery pack (not shown) according to an embodiment of the second aspect of the utility model comprises a battery 100 according to an embodiment of the first aspect of the utility model.

[0078] According to the battery pack of the present invention, by adopting the above-mentioned battery 100, the space utilization rate in the battery pack is improved, which is also beneficial to the use of the battery pack.

[0079] The battery pack according to the third embodiment of the present invention comprises the battery 100 according to the first embodiment of the present invention and a box (not shown), wherein the battery 100 is accommodated in the box.

[0080] According to the battery pack (not shown) of the present invention, by adopting the above-mentioned battery 100, the space utilization rate in the box is improved, and the battery is also easy to install in the box. In addition, it is also beneficial to the use of the battery pack.

[0081] The electrical equipment (not shown) according to the fourth aspect of the utility model comprises a battery according to the first aspect of the utility model, or a battery pack according to the second aspect of the utility model, or a battery pack according to the third aspect of the utility model.

[0082] According to the electric device (not shown) of the utility model, by using the above-mentioned battery, or the above-mentioned battery pack, or the above-mentioned battery pack, the space utilization rate in the electric device is improved, and the performance of the electric device is improved. It should be noted that the electric device can be a vehicle, an aircraft, a ship, a computer or an energy storage cabinet, etc.

[0083] Other structures and operations of the battery 100, battery pack, battery package and electrical equipment according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0084] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "inside", "outside", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0086] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that: include: A shell, the shell comprising a shell body, a first cover body and a second cover body, the first cover body and the second cover body are respectively arranged on both sides of the shell body, the first cover body, the shell body and the second cover body jointly define a cavity, and a groove is formed on a surface of at least one of the first cover body, the shell body and the second cover body on a side away from the cavity; At least one pole assembly is provided in the groove, and an end surface of the pole assembly away from the cavity does not protrude from a surface of the pole assembly corresponding to the groove.

2. The battery according to claim 1, characterized in that The groove is formed on a surface of the first cover body on one side away from the second cover body.

3. The battery according to claim 2, characterized in that The groove is located at one end of the first cover body in the length direction, and the length of the groove in the width direction of the first cover body is smaller than the width of the first cover body.

4. The battery according to claim 2, characterized in that A surface of one side of the first cover body facing the cavity protrudes in a direction away from the cavity to form a protrusion, and a part of a side surface of the protrusion constitutes a side wall of the groove.

5. The battery according to claim 4, characterized in that The edge of the protrusion has an extension portion, a side surface of the extension portion away from the cavity is flush with the bottom wall of the groove, and the extension portion is connected to a side surface of the shell body facing the first cover body.

6. The battery according to any one of claims 1 to 5, characterized in that The groove is formed on the first cover body, and the first cover body is an integrally formed part.

7. The battery according to claim 2, characterized in that A liquid injection hole is formed on the bottom wall of the groove, the liquid injection hole is communicated with the cavity, and the liquid injection hole is spaced apart from the pole assembly.

8. The battery according to claim 1, characterized in that Openings are formed on both sides of the shell body in the height direction, and the first cover body and the second cover body are respectively arranged on one side of the corresponding opening away from the cavity and connected to the shell body.

9. The battery according to claim 1, characterized in that The battery further comprises a battery cell, wherein the battery cell is arranged in the cavity, and the pole assembly comprises: A lead-out piece, the lead-out piece is disposed in the cavity and is conductively connected to the battery core, the lead-out piece is insulated and connected to the first cover, and the lead-out piece is opposite to the groove; A pole, one end of which passes through the bottom wall of the groove and is conductively connected to the lead-out piece, the other end of which is located in the groove, and the pole is insulated and connected to the first cover.

10. The battery according to claim 9, characterized in that The pole assembly also includes: a first insulating member, the first insulating member being disposed between the lead-out piece and the first cover; A second insulating member, wherein the second insulating member is arranged in the groove, the one end of the pole passes through the second insulating member, the bottom wall of the groove, the first insulating member and is connected to the lead-out piece in sequence, and the other end of the pole is located on a side of the second insulating member away from the cavity.

11. The battery according to claim 1, characterized in that The side wall thickness of the shell body is d1, wherein d1 satisfies: 20 μm≤d1≤500 μm; and / or The thickness of the first cover is d2, wherein d2 satisfies: 20 μm≤d2≤500 μm; and / or The thickness of the second cover is d3, wherein d3 satisfies: 20 μm≤d3≤500 μm.

12. The battery according to claim 1, characterized in that The second cover body is a sheet-like structure.

13. The battery according to claim 1, characterized in that The first cover and the shell body are welded at the edges, and the weld extends from a side surface of the first cover away from the shell body into the shell body; and / or The second cover body and the shell body are welded at the edges, and the weld extends from a side surface of the second cover body away from the shell body into the shell body.

14. A battery pack, characterized in that: Comprising a battery according to any one of claims 1-13.

15. A battery pack, characterized in that: The invention comprises a battery according to any one of claims 1 to 13 and a casing, wherein the battery is accommodated in the casing.

16. An electrical equipment, characterized in that: It comprises the battery according to any one of claims 1 to 13, or the battery pack according to claim 14, or the battery pack according to claim 15.

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