CN218385466U - Battery with a battery cell - Google Patents

Abstract

The application provides a battery, including top cap, lower casing and electric core subassembly, the electric core subassembly sets up in the cavity that top cap and lower casing enclose to establish and form, and the top cap includes casing and utmost point post, utmost point post fixed connection in last casing. Utmost point post includes utmost point post body and extension, and the extension is connected in the bottom of utmost point post body, and utmost point post has the fixed orifices that link up utmost point post body and extension, and utmost point post body sets up in the one side that deviates from lower casing of last casing, and the extension is buried underground in the inside of last casing. The battery can improve the production efficiency of battery assembly and reduce the production and working cost.

Description

Battery with a battery cell

Technical Field

The application belongs to the field of batteries, and particularly relates to a battery.

Background

At present, electronic equipment is widely applied to daily life, along with the increasing use frequency, the increasing power consumption and the lighter and thinner volume of the electronic equipment, and a battery is used as a core part of the electronic equipment to directly determine the performance of the electronic equipment.

The existing battery consists of a battery cell, a pole column, a shell and a top cover, wherein a battery cell body of the battery cell is connected with the pole column of the battery through a pole lug of the battery cell. Specifically, shell and top cap play the effect that the inside electric core of protection does not receive destruction as the exterior structure of battery, set up electric core in the cavity that shell and top cap surrounded, connect the utmost point ear and the outside electronic equipment of electric core through utmost point post to supply power to electronic equipment.

However, the pole needs to be assembled with the shell and the top cover, so that the speed of battery assembly is low, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

To prior art's not enough, this application provides a battery, can improve the production efficiency of battery equipment, reduces production operating cost.

The application provides a battery, including top cap, lower casing and electric core subassembly, the electric core subassembly sets up in the cavity that top cap and lower casing enclose to establish and form, and the top cap includes casing and utmost point post, utmost point post fixed connection in last casing. Utmost point post includes utmost point post body and extension, and the extension is connected in the bottom of utmost point post body, and utmost point post has the fixed orifices that link up utmost point post body and extension, and utmost point post body sets up in the one side of the casing under deviating from of last casing, and the extension is buried underground in the inside of last casing.

Optionally, the pole and the upper shell are an integral injection molding part.

Optionally, the extension portion protrudes radially towards the pole to form a first protrusion, and a gap is formed between the first protrusion and the bottom end of the pole body.

Optionally, a first groove is formed in the end face of the bottom end of the pole body, the first groove is circumferentially arranged along the circumference of the pole body, and the width of the first groove is 3-5mm.

Optionally, a second groove is formed in the hole wall of the fixing hole, and the second groove is formed in one side, close to the top end of the pole body, of the fixing hole.

Optionally, the battery further comprises a sealing element, wherein the sealing element is arranged at the top end of the pole and extends into the fixing hole; and a second bulge is arranged on the side wall of the sealing element, and the second bulge is matched and embedded with the second groove.

Optionally, the battery further includes a battery management assembly, the battery management assembly includes a battery management unit and a mounting bracket, the mounting bracket is connected to the upper housing, and the battery management unit is disposed on the mounting bracket and used for connecting the battery core and the terminal.

Optionally, the battery further includes a bolt, the bolt includes a bolt body and a third protrusion connected to an end of the bolt body, the third protrusion is disposed in the mounting frame, and the bolt body penetrates through the fixing hole.

Optionally, the bolt and the mounting bracket are an integral injection molded part.

Optionally, the battery further comprises an adapter sheet, the adapter sheet comprises a positive adapter sheet and a negative adapter sheet, and the adapter sheet is connected to the battery management unit and the pole.

Optionally, the adapter plate is provided with a through hole, and the projection of the through hole in the thickness direction of the battery coincides with the fixing hole. The battery also comprises a nut, the bolt body is arranged in the through hole and the fixing hole in a penetrating mode and is connected with one end of the nut in a screwing mode, and one end, deviating from the bolt body, of the nut is provided with a force application portion for applying force to an external tool.

Optionally, the force application part is a polygonal hole located at one end of the nut, which is far away from the bolt body.

Optionally, the electric core assembly includes electric core, first fixed plate and second fixed plate, and electric core sets up in first fixed plate and second fixed plate enclose establishes the cavity that forms, and first fixed plate connects in the mounting bracket, and the second fixed plate connects in casing down.

Optionally, the first protrusion and the third protrusion are both polygonal protrusions.

The application provides a battery, including top cap, lower casing and electric core subassembly, the electric core subassembly sets up in top cap and the cavity that the casing encloses to establish down and forms, and the top cap includes casing and utmost point post, utmost point post fixed connection in last casing. Utmost point post includes utmost point post body and extension, and the extension is connected in the bottom of utmost point post body, and utmost point post has the fixed orifices that link up utmost point post body and extension, and utmost point post body sets up in the one side of the casing under deviating from of last casing, and the extension is buried underground in the inside of last casing. The battery of this application can improve the production efficiency of battery equipment, reduces production working cost.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a battery provided in an embodiment of the present application;

fig. 2 is an exploded view of the battery of fig. 1;

FIG. 3 is a schematic structural view of the pole of FIG. 1;

fig. 4 is a sectional view of the pole of fig. 3;

FIG. 5 is a schematic view of the seal of FIG. 2;

FIG. 6 is a schematic view of the bolt of FIG. 2;

fig. 7 is a schematic structural view of the nut in fig. 2.

Description of reference numerals:

100-a battery;

110-a top cover;

120-a lower shell;

130-electric core assembly;

140-a seal;

150-a battery management assembly;

160-bolt;

170-an adapter sheet;

180-a nut;

111-an upper shell;

112-pole;

113-pole body;

114-an extension;

115-fixation holes;

1131 — first groove;

1141-a first bump;

1151-a second groove;

131-cell core;

132-a first fixation plate;

133-a second fixation plate;

141-a second bump;

151-battery management unit;

152-a mounting frame;

161-bolt body;

162-a third projection;

171-a through hole;

181-force application part.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present application more comprehensible, embodiments of the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The existing battery consists of a battery cell, a pole column, a shell and a top cover, wherein a battery cell body of the battery cell is connected with the pole column of the battery through a pole lug of the battery cell. Specifically, shell and top cap play the effect that the inside electric core of protection does not receive destruction as the exterior structure of battery, set up electric core in the cavity that shell and top cap surrounded, connect the utmost point ear and the outside electronic equipment of electric core through utmost point post to supply power to electronic equipment.

However, the pole needs to be assembled with the shell and the top cover, so that the speed of battery assembly is low, and the production efficiency is low.

In order to solve the above problems, the present application provides a battery including a top cap, a lower case, and a battery cell assembly. The electric core component is arranged in a cavity formed by enclosing the top cover and the lower shell. The top cap includes casing and utmost point post, and utmost point post fixed connection in last casing, and utmost point post and last casing need not assemble alone, can improve the production efficiency of battery equipment, reduce production working cost.

The details of the present application will now be further described with reference to the accompanying drawings and detailed description.

The existing battery consists of a battery cell, a pole column, a shell and a top cover, wherein a battery cell body of the battery cell is connected with the pole column of the battery through a pole lug of the battery cell. Specifically, shell and top cap play the effect that the inside electric core of protection does not receive destruction as the exterior structure of battery, set up electric core in the cavity that shell and top cap surrounded, connect the utmost point ear and the outside electronic equipment of electric core through utmost point post to supply power to electronic equipment. However, the pole needs to be assembled with the shell and the top cover, so that the speed of battery assembly is low, and the production efficiency is low.

The application provides a battery, including top cap, lower casing and electric core subassembly. The top cap includes casing and utmost point post, and utmost point post includes utmost point post body and extension. The extension is connected in the bottom of utmost point post body, and utmost point post has the fixed orifices that link up utmost point post body and extension, and utmost point post body sets up in the one side of casing under deviating from of last casing, and the extension buries underground in the inside of last casing to make utmost point post fixed connection in last casing, can improve the production efficiency of battery equipment, reduction production working cost.

Fig. 1 is a schematic structural diagram of a battery provided in an embodiment of the present application. Fig. 2 is an exploded view of the battery of fig. 1. As shown in fig. 1 and 2, the battery 100 includes a top cap 110, a lower case 120, and a core pack assembly 130, the top cap 110 and the lower case 120 serve as an external structure of the battery 100 to protect the internal core pack assembly 130 from external damage, and the core pack assembly 130 serves as an internal core power supply structure of the battery 100 to supply power to external electronic devices. The electric core assembly 130 is disposed in a cavity defined by the top cover 110 and the lower housing 120, so as to be protected from external damage.

Specifically, the top cover 110 includes an upper housing 111 and a pole 112, and the pole 112 is fixedly connected to the upper housing 111. When the battery 100 is assembled, because the terminal post 112 is fixedly connected to the upper housing 111, the terminal post 112 and the upper housing 111 do not need to be assembled separately, the assembling process of the battery 100 can be simplified, the assembling time of the battery 100 can be saved, the assembling production efficiency of the battery 100 can be improved, and the production working cost can be reduced.

Further, the pole 112 comprises a pole body 113 and an extension 114. Fig. 3 is a schematic structural view of the pole in fig. 1. Fig. 4 is a cross-sectional view of the pole of fig. 3. As shown in fig. 3 and 4, the extension portion 114 is connected to the bottom end of the post body 113, and the post 112 has a fixing hole 115 penetrating the post body 113 and the extension portion 114. Since the pole 112 has a fixing hole 115 passing through the pole body 113 and the extension 114, on the one hand, for fixedly connecting the top cover 110 and the lower housing 120; on the other hand, the pole 112 and the inner electric core assembly 130 can be conducted to realize electric connection. The pole body 113 is disposed on a side of the upper housing 111 away from the lower housing 120, and the extending portion 114 is embedded in the upper housing 111, so that the pole 112 is fixedly connected to the upper housing 111.

Optionally, the pole 112 and the upper housing 111 are an integral injection molding. Specifically, the upper housing 111 is formed by injection molding on the basis of the pole 112, and since the pole 112 and the upper housing 111 are integrally injection molded, the pole 112 and the upper housing 111 can be fixedly connected more tightly, so that the pole 112 and the upper housing 111 are prevented from falling off and the normal use of the battery 100 is prevented from being influenced. In addition, the pole post 112 and the upper case 111 do not need to be assembled separately, and the production efficiency of assembling the battery 100 can be improved.

Optionally, the extending portion 114 protrudes radially from the pole 112 to form a first protrusion 1141, and the first protrusion 1141 and the bottom end of the pole body 113 have a gap. Specifically, in the process of injection molding of the upper housing 111 on the basis of the pole 112, because the extension portion 114 protrudes radially toward the pole 112, a first protrusion 1141 is formed, and a gap is formed between the bottom end of the first protrusion 1141 and the bottom end of the pole body 113, so that the upper housing 111 can be completely filled around the first protrusion 1141 and in the gap between the bottom end of the first protrusion 1141 and the bottom end of the pole body 113, and the pole 112 and the upper housing 111 are fixed more firmly and are not easy to fall off.

As an optional implementation manner, the bottom end face of the pole body 113 is provided with a first groove 1131, the first groove 1131 is circumferentially arranged along the circumference of the pole body 113, and the width of the first groove 1131 is 3-5mm. Specifically, go up the in-process that casing 111 moulded plastics on utmost point post 112's basis, if utmost point post body 113's bottom end face does not set up first recess 1131, go up casing 111 and can directly fill in the clearance of first arch 1141 and utmost point post body 113 bottom to strike utmost point post body 113's bottom end face, cause utmost point post body 113's bottom end face unevenness, and then cause the problem of last casing 111 plane unevenness.

Because the bottom end face of utmost point post body 113 is provided with first recess 1131, first recess 1131 encircles the setting along utmost point post body 113's circumference, can make last casing 111 pack at first in first recess 1131, and then continue to pack into first arch 1141 and utmost point post body 113's clearance in to reduce the impact to utmost point post body 113 bottom, make utmost point post body 113 bottom end face level and smooth, and then make the plane of last casing 111 level and smooth.

In addition, the width of the first groove 1131 is 3-5mm, so that on one hand, the problem that the plane of the upper shell 111 is still uneven due to the fact that the width of the first groove 1131 is too small can be avoided; on the other hand, it can be avoided that the upper case 111 is filled too much due to the too large width of the first groove 1131, which leads to the increase of cost and the reduction of efficiency.

Optionally, a second groove 1151 is disposed on the hole wall of the fixing hole 115, and the second groove 1151 is disposed on one side of the fixing hole 115 close to the top end of the pole body 113. Specifically, because the second groove 1151 is formed in the hole wall of the fixing hole 115, the second groove 1151 is formed in one side, close to the top end of the pole body 113, of the fixing hole 115, and can be matched with an external structure through the second groove 1151, so as to install the fixed pole 112, and further install the fixed top cover 110.

Optionally, cell 100 further includes a seal 140. Fig. 5 is a schematic structural view of the sealing member of fig. 2. As shown in fig. 5, the sealing member 140 is disposed at the top end of the pole 112 and extends into the fixing hole 115; the side wall of the sealing member 140 is provided with a second protrusion 141, and the second protrusion 141 and the second groove 1151 are in matched engagement. Specifically, because the battery 100 further comprises the sealing element 140, the sealing element 140 is arranged at the top end of the pole 112 and extends into the fixing hole 115, the side wall of the sealing element 140 is provided with the second protrusion 141, the second protrusion 141 and the second groove 1151 are matched and embedded, so that the sealing element 140 and the pole 112 can form a closed structure through the matching and embedding of the second protrusion 141 and the second groove 1151, when the sealing element 140 and the pole 112 are fixedly connected, the time for fixing and sealing by coating glue can be reduced, and the production efficiency is improved.

As an alternative embodiment, the battery 100 further includes a battery management assembly 150 for intelligently managing and maintaining the battery assembly 130, preventing overcharge and overdischarge of the battery 100, extending the service life of the battery 100, and monitoring the state of the battery 100.

The battery management assembly 150 includes a battery management unit 151 and a mounting bracket 152, and the mounting bracket 152 is connected to the upper case 111 for mounting and fixing the battery management unit 151. The battery management unit 151 is disposed on the mounting frame 152, and is a most core unit of the battery management assembly 150, and is connected to the battery cells 131 and the poles 112 to manage and maintain the battery cells 131.

Optionally, battery 100 further includes a bolt 160. Fig. 6 is a schematic structural view of the bolt in fig. 2. As shown in fig. 6, the bolt 160 includes a bolt body 161 and a third protrusion 162 connected to an end of the bolt body 161, the third protrusion 162 is disposed in the mounting bracket 152, and the bolt body 161 is disposed through the fixing hole 115. Specifically, because the bolt 160 includes the bolt body 161 and the third protrusion 162 connected to the end of the bolt body 161, the third protrusion 162 is disposed in the mounting bracket 152, the bolt body 161 is inserted into the fixing hole 115, the third protrusion 162 is disposed in the mounting bracket 152 and then connected to the battery management unit 151, the bolt body 161 is connected to the third protrusion 162 and the fixing hole 115 and then connected to the terminal 112, and finally, the terminal 112 and the battery management unit 151 are electrically connected.

Alternatively, the bolt 160 and the mounting bracket 152 are an integral injection molded piece. Specifically, mounting bracket 152 is formed through the mode of moulding plastics on the basis of bolt 160, because bolt 160 and mounting bracket 152 are injection molding as an organic whole, can make the fixed connection of bolt 160 and mounting bracket 152 inseparabler to avoid bolt 160 and mounting bracket 152 to take place to drop, influence the normal use of battery 100. In addition, the bolts 160 and the mounting bracket 152 do not need to be separately assembled, thereby improving the productivity of assembling the battery 100.

As an optional embodiment, the battery 100 further includes an interposer 170, where the interposer 170 includes a positive interposer and a negative interposer, and the interposer 170 is connected to the battery management unit 151 and the terminal post 112. Specifically, when the connection position of the battery management unit 151 and the terminal 112 is obstructed, the adapter sheet 170 is arranged in the battery 100, the adapter sheet 170 comprises a positive adapter sheet and a negative adapter sheet, the adapter sheet 170 is connected to the battery management unit 151 and the terminal 112, the battery management unit 151 and the terminal 112 can be prevented from being directly connected due to the fact that the position relation of the battery management unit 151 and the terminal 112 is unable, and the connection of the battery management unit 151 and the terminal 112 can be more convenient.

Alternatively, the interposer 170 is provided with a through hole 171, and a projection of the through hole 171 in the thickness direction of the battery 100 coincides with the fixing hole 115, so that the bolt 160 may be sequentially inserted through the through hole 171 and the fixing hole 115. Battery 100 also includes nut 180. Fig. 7 is a schematic structural view of the nut in fig. 2. As shown in fig. 7, a nut 180 is used to couple with the bolt 160 provided on the mounting bracket 152 to fixedly couple the top cover 110, the interposer 170, and the battery management assembly 150.

Specifically, the bolt body 161 is inserted into the through hole 171 and the fixing hole 115, and is screwed with one end of the nut 180 to connect the battery management assembly 150, the adaptor sheet 170 and the top cover 110 as a whole. Wherein, the nut 180 has a force application part 181 at one end thereof away from the bolt body 161 for applying force by an external tool, so as to facilitate the assembly of the whole battery 100.

Alternatively, the force application portion 181 is a polygonal hole at one end of the nut 180 facing away from the bolt body 161. Specifically, since the force application portion 181 is a polygonal hole located at one end of the nut 180 away from the bolt body 161, an external tool can be better matched with the force application portion 181, and the nut 180 can bear larger torsion in the process of rotating and assembling, so that the nut 180 is connected more tightly.

As an alternative embodiment, the battery cell assembly 130 includes a battery cell 131, a first fixing plate 132 and a second fixing plate 133. The first fixing plate 132 and the second fixing plate 133 serve as an external structure of the cell assembly 130 to protect the cell 131 from external damage, and the cell 131 serves as an internal core unit of the cell assembly 130 to provide electric energy to an external electronic device.

The battery cell 131 is disposed in a cavity defined by the first fixing plate 132 and the second fixing plate 133, the first fixing plate 132 is connected to the mounting frame 152, and the second fixing plate 133 is connected to the lower case 120 to form the complete battery 100.

Optionally, the first protrusion 1141 and the third protrusion 162 are both polygonal protrusions. Specifically, because first arch 1141 and third arch 162 are polygonal bulges, first arch 1141 can be in contact with upper shell 111 on a plurality of planes, third arch 162 can be in contact with a plurality of planes and mounting rack 152, when rotating or drawing first arch 1141 and third arch 162, the first arch 1141 and third arch 162 are prevented from falling off easily, and pole 112 and bolt 160 are prevented from falling off easily.

The connection process of the battery 100 provided by the present application is as follows: the battery 100 includes a top cap 110, a lower case 120, an electric core assembly 130, a sealing member 140, a battery management assembly 150, a bolt 160, an adaptor sheet 170, and a nut 180. The electric core assembly 130 is disposed in a cavity defined by the top cover 110 and the lower housing 120. The top cover 110 includes an upper case 111 and a pole 112. The cell assembly 130 includes cells 131, a first fixing plate 132 and a second fixing plate 133, and the battery management assembly 150 includes a battery management unit 151 and a mounting frame 152.

The first fixing plate 132 is connected to the mounting frame 152, and the second fixing plate 133 is connected to the lower housing 120. The battery management unit 151 is disposed on the mounting bracket 152 and connected to the pole 112 through the adaptor sheet 170. The bolt 160 is disposed on the mounting frame 152, sequentially penetrates through the through hole 171 of the adaptor sheet 170 and the fixing hole 115 of the pole 112, and is connected to one end of the nut 180, and the other end of the nut 180 is provided with a force application portion 181 for applying force by an external tool, so as to assemble the battery 100 into a complete whole.

Specifically, the pole 112 is fixedly connected to the upper housing 111, and the pole 112 and the upper housing 111 are integrally injection-molded, so that the pole 112 and the upper housing 111 do not need to be assembled separately when the battery 100 is assembled, the assembling process of the battery 100 can be simplified, the assembling time of the battery 100 can be saved, the assembling production efficiency of the battery 100 can be improved, and the production working cost can be reduced.

The application provides a battery, including top cap, lower casing and electric core subassembly, the electric core subassembly sets up in the cavity that top cap and lower casing enclose to establish and form, and the top cap includes casing and utmost point post, utmost point post fixed connection in last casing. Utmost point post includes utmost point post body and extension, and the extension is connected in the bottom of utmost point post body, and utmost point post has the fixed orifices that link up utmost point post body and extension, and utmost point post body sets up in the one side that deviates from lower casing of last casing, and the extension is buried underground in the inside of last casing. The battery can improve the production efficiency of battery assembly and reduce the production and working cost.

In the description of the present application, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", and the like, as used herein, indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the position or element so referred to must have a particular orientation, be of particular construction and operation, and thus should not be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In this application, unless specifically stated or limited otherwise, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly and may for example be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate agent, and may be used for communicating the inside of two elements or interacting relation of two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present application may be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (14)

1. A battery is characterized by comprising a top cover, a lower shell and a cell assembly, wherein the cell assembly is arranged in a cavity formed by enclosing the top cover and the lower shell, the top cover comprises an upper shell and a pole, and the pole is fixedly connected to the upper shell;

utmost point post includes utmost point post body and extension, the extension connect in the bottom of utmost point post body, just utmost point post has to link up utmost point post body with the fixed orifices of extension, utmost point post body set up in going up deviating from of casing one side of casing down, the extension bury underground in the inside of going up the casing.

2. The battery of claim 1, wherein the pole and the upper housing are an integral injection molded part.

3. The battery of claim 2, wherein the extension projects radially of the pole to form a first projection, the first projection having a gap with the bottom end of the pole body.

4. The battery according to claim 3, wherein a first groove is formed in the bottom end face of the pole body, the first groove is circumferentially arranged along the circumference of the pole body, and the width of the first groove is 3-5mm.

5. The battery according to claim 4, wherein a second groove is formed on the wall of the fixing hole, and the second groove is formed on one side of the fixing hole close to the top end of the pole body.

6. The battery of claim 5, further comprising a sealing member disposed at the top end of the post and extending into the fixation hole; and a second bulge is arranged on the side wall of the sealing element, and the second bulge is matched and embedded with the second groove.

7. The battery of claim 6, further comprising a battery management assembly, wherein the battery management assembly comprises a battery management unit and a mounting bracket, the mounting bracket is connected to the upper housing, and the battery management unit is disposed on the mounting bracket and is used for connecting the battery core and the terminal post.

8. The battery of claim 7, further comprising a bolt, wherein the bolt comprises a bolt body and a third protrusion connected to an end of the bolt body, the third protrusion is disposed in the mounting bracket, and the bolt body is inserted into the fixing hole.

9. The battery of claim 8, wherein the bolt and the mounting bracket are an integral injection molded piece.

10. The battery of claim 9, further comprising an interposer, the interposer comprising a positive interposer and a negative interposer, the interposer connected to the battery management unit and the post.

11. The battery of claim 10, wherein the interposer is provided with a through hole, and a projection of the through hole in the thickness direction of the battery coincides with the fixing hole;

the battery also comprises a nut, the bolt body penetrates through the through hole and the fixing hole and is connected with one end of the nut in a screwing mode, and one end of the nut, which deviates from the bolt body, is provided with a force application part for applying force to an external tool.

12. The battery of claim 11, wherein the force application portion is a polygonal hole at an end of the nut facing away from the bolt body.

13. The battery of claim 12, wherein the core assembly comprises a core, a first fixing plate and a second fixing plate, the core is disposed in a cavity defined by the first fixing plate and the second fixing plate, the first fixing plate is connected to the mounting frame, and the second fixing plate is connected to the lower case.

14. The battery of claim 13, wherein the first protrusion and the third protrusion are both polygonal protrusions.

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