CN219677407U

CN219677407U - Battery cell

Info

Publication number: CN219677407U
Application number: CN202320512187.8U
Authority: CN
Inventors: 严晓雄; 阳成海; 何伊; 谢继春
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-09-12
Anticipated expiration: 2033-03-15

Abstract

The utility model provides a battery, which comprises a shell, a battery cell and a switching assembly, wherein the shell is provided with a containing cavity, the battery cell is contained in the containing cavity, and the battery cell comprises a battery cell body and a battery cell tab which are connected with each other; the switching subassembly includes the switching utmost point ear, and with the first insulating part that switching utmost point ear one-to-one set up, the switching utmost point ear includes interconnect's lamellar body and pin, lamellar body and pin are the contained angle setting, lamellar body one-to-one is connected in electric core utmost point ear, first insulating part fixed connection is in the casing, pin fixed connection is in first insulating part, and the pin extends to the holding chamber outside through first insulating part. The battery has higher energy density, and the battery core tab is not easy to break.

Description

Battery cell

Technical Field

The utility model relates to the technical field of battery energy, in particular to a battery.

Background

The battery can provide power for vehicles such as electric automobiles, electric trains, electric bicycles, golf carts and the like to replace traditional energy sources such as gasoline and the like, and is a main direction of the development of new energy sources at present. Or provides power for electronic equipment such as mobile phones, tablet computers and the like.

In the related art, the battery comprises a plurality of battery cells, the battery module is formed by the plurality of battery cells, the battery pack is formed by the plurality of battery modules, the battery cells comprise a shell and a battery cell body, the battery cell body is formed by sequentially laminating a plurality of foil layers or winding a single foil layer, the foil layer is provided with foil lugs, the battery cell body is used for reacting with electrolyte to form current through charge and discharge, the foil lugs are extended from the inside of the shell to the outside of the shell, and the foil lugs are used for being connected with a device to be powered so as to transmit the current.

However, the foil tab of such a battery is susceptible to breakage.

Disclosure of Invention

Based on the above, the utility model provides a battery to solve the problem that the battery cell tab of the battery in the related art is easy to break when being subjected to tensile force.

The battery provided by the utility model comprises a shell, a battery cell and a switching assembly, wherein the shell is provided with a containing cavity, the battery cell is contained in the containing cavity, and the battery cell comprises a battery cell body and a battery cell tab which are connected with each other;

the switching subassembly includes the switching utmost point ear, and with the first insulating part that switching utmost point ear one-to-one set up, the switching utmost point ear includes interconnect's lamellar body and pin, lamellar body and pin are the contained angle setting, lamellar body one-to-one is connected in electric core utmost point ear, first insulating part fixed connection is in the casing, pin fixed connection is in first insulating part, and the pin extends to the holding chamber outside through first insulating part.

The battery provided by the utility model comprises a shell, a battery cell and a switching assembly, wherein the battery cell comprises a battery cell body and a battery cell tab, the switching assembly comprises a switching tab and a first insulating piece, and the switching tab comprises a sheet body and pins. The battery cell is used for charging and discharging to form current through setting up the battery cell body, be used for drawing anodal and the negative pole of battery cell body through setting up the battery cell utmost point ear, the switching subassembly is used for connecting the battery cell utmost point ear and waits power supply unit through setting up the switching utmost point ear, be used for insulating protection switching utmost point ear through setting up first insulating part, in order to prevent switching utmost point ear short circuit, the switching utmost point ear is used for being connected with the battery cell utmost point ear through setting up the lamellar body, be used for being connected with waiting power supply unit through setting up the pin, be the contained angle setting through messenger's pin and lamellar body, and make battery cell utmost point ear attached in the side of battery cell body, in order to reduce the space that lamellar body and battery cell utmost point ear occupy, and then improve the battery energy density of battery, through first insulating part fixed connection pin and casing, in order to avoid the pulling force transmission that the switching utmost point ear received to the battery cell utmost point ear, thereby prevent the battery cell utmost point ear fracture. Therefore, the battery has higher energy density, and the battery core tab is not easy to break.

In one possible implementation manner, the battery provided by the utility model has the advantages that the battery core body comprises a plurality of polar plates, the polar plates are sequentially stacked, and the extending direction of the polar lugs of the battery core is consistent with the stacking direction of the polar plates.

In one possible implementation manner, the battery provided by the utility model comprises a first shell and a second shell which are arranged along the stacking direction of the polar plates, wherein the first shell and the second shell are connected to jointly enclose a containing cavity;

the pin is arranged between the first shell and the second shell.

In one possible implementation manner, in the battery provided by the utility model, the extending direction of the sheet body is consistent with the stacking direction of the polar plates, and the included angle between the pin and the sheet body is greater than or equal to 70 degrees and less than or equal to 110 degrees.

In one possible implementation manner, the battery provided by the utility model has the advantages that the first shell is plate-shaped, the second shell is provided with the first placing groove, the notch of the first placing groove faces the first shell, and the sheet body is arranged in the first placing groove.

In one possible implementation manner, the battery provided by the utility model has the advantages that the first shell is provided with the second placing groove, the second shell is provided with the third placing groove, the notch of the second placing groove is opposite to the notch of the third placing groove, one part of the sheet body is arranged in the second placing groove, and the other part of the sheet body is arranged in the third placing groove.

In one possible implementation manner, the pin of the battery provided by the utility model comprises an exposed section, a connecting section and a built-in section which are sequentially connected, wherein the exposed section and the connecting section are arranged outside the accommodating cavity, the first insulating piece is connected with the connecting section, the built-in section is arranged in the accommodating cavity, and the built-in section is connected with the sheet body.

In one possible implementation manner, the battery provided by the utility model has the advantages that the battery cell tab comprises at least one tab group, the tab group comprises at least one foil tab, the foil tab is bent towards the central surface of the battery cell body in the stacking direction, the sheet body is arranged between the battery cell body and the tab group, and the sheet body is connected with the tab group.

In one possible implementation manner, the number of the tab groups is two, the two tab groups are bent towards the central plane of the stacking direction of the battery cell body, and projections of the two tab groups on the central plane of the stacking direction of the battery cell body are at least partially overlapped.

In one possible implementation manner, the battery provided by the utility model comprises a sheet body, wherein the sheet body comprises a first welding connection area and a second welding connection area, one tab group is welded with the first welding connection area, and the other tab group is welded with the second welding connection area.

In one possible implementation manner, the battery provided by the utility model further comprises a second insulating piece, wherein the second insulating piece is arranged between the battery cell body and the sheet body, the second insulating piece is adhered to the battery cell body, and the projection of the sheet body along the stacking direction of the polar plates is positioned in the second insulating piece.

In one possible implementation manner, the battery provided by the utility model further comprises a third insulating piece, wherein the third insulating piece is arranged between the tab group and the inner wall of the shell, and the projection of the tab group along the stacking direction of the polar plates is positioned in the third insulating piece.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic view of another structure of a battery according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of the battery cell and the adapter assembly of FIG. 2;

FIG. 5 is a schematic view in section A-A of FIG. 4;

fig. 6 is a schematic structural diagram of a switching tab in a battery according to an embodiment of the present utility model;

fig. 7 is a schematic view of another structure of a switching tab in a battery according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a battery core and a switching assembly in a battery according to an embodiment of the present utility model;

fig. 9 is a schematic view of another structure of a battery cell and a switching assembly in a battery according to an embodiment of the present utility model;

fig. 10 is a schematic view of another structure of a battery cell and a switching assembly in the battery according to the embodiment of the utility model.

Reference numerals illustrate:

100-a housing; 110-a first housing; 111-a second placement groove; 120-a second housing; 121-a first placement groove; 122-a third placement groove;

200-cell; 210-a cell body; 220-cell lugs; 221-tab group; 221 A-A first tab group; 221 b-a second ear group;

300-an adapter assembly; 310-switching the tab; 311-sheet body; 3111-first solder joint area; 3112-second solder connection area; 312-pins; 3121-exposed segment; 3122-connection segment; 3123-built-in section; 320-a first insulating member; 330-a second insulator; 340-third insulator.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the preferred embodiments of the present utility model will be described in more detail with reference to the accompanying drawings in the preferred embodiments of the present utility model. In the drawings, the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the utility model. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship of the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms first, second, third and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or display that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or display.

However, the foil tab of such a battery is susceptible to breakage. This is because the cells are generally thick, the number of foil layers is very large, and the foil tabs are bent in the stacking direction of the foil layers. In the production process, the outer foil tab can be subjected to larger tensile force, so that one or more layers of foil tabs are broken, and the performance of the battery is seriously affected. In order to solve the problem of breakage of the foil tab, the foil tab can be selected not to be bent, but the head of the battery is reserved with a space exceeding 5mm, so that the energy density of the battery is affected.

In view of the above, the embodiment of the utility model provides a battery, which is provided with a switching tab and a first insulating piece, so that the switching tab is connected with a foil tab and a device to be powered through the switching tab, and the switching tab is fixedly connected with a shell through the first insulating piece, so that the foil tab is not easily affected when the battery is subjected to tensile force, and the problem that the foil tab is easily broken in the related art is solved on the premise that the energy density of the battery is not reduced.

Specific embodiments of a battery provided by embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 7, a battery provided by an embodiment of the utility model includes a housing 100, a battery cell 200 and a switching assembly 300, the housing 100 has a receiving cavity, the battery cell 200 is received in the receiving cavity, the battery cell 200 includes a battery cell body 210 and a battery cell tab 220, the battery cell tab 220 is attached to a side surface of the battery cell body 210, the battery cell tab 220 includes a positive battery cell tab 220 and a negative battery cell tab 220 of the battery cell tab 220, the switching assembly 300 includes a switching tab 310 and first insulating members 320 disposed in one-to-one correspondence with the switching tab 310, the switching tab 310 includes a sheet body 311 and a pin 312 connected to each other, the sheet body 311 and the pin 312 are disposed in an included angle, the sheet body 311 is connected to the battery cell tab 220 in one-to-one correspondence, the first insulating member 320 is fixedly connected to the housing 100, the pin 312 is fixedly connected to the first insulating member 320, and the pin 312 extends out of the receiving cavity through the first insulating member 320, and the pin 312 is configured to be connected to a device to be powered.

In the present utility model, the housing 100 is configured to accommodate the battery cell 200 and the electrolyte, so that the battery cell 200 and the electrolyte react in the accommodating cavity to complete the charging and discharging process, and form a current, so as to supply power to a device to be powered of a vehicle such as an electric automobile or an electronic device such as a mobile phone, for example, the device to be powered may be a motor of the electric automobile. The switching assembly 300 is used for leading the positive electrode and the negative electrode of the battery cell 200 out of the accommodating cavity to be connected with the device to be powered, so as to transmit power to the device to be powered.

Specifically, the electric core 200 may include an electric core body 210 and an electric core tab 220, where the electric core tab 220 is bent relative to the electric core body 210 to be attached to a side surface of the electric core body 210, so as to reduce an occupied space of the electric core tab 220, the electric core body 210 may be a cylinder or a cuboid, and a shape of the accommodating cavity is matched with a shape of the electric core body 210.

For example, the number of the battery cell tabs 220 is two, one of the two battery cell tabs 220 is a positive battery cell tab 220 for leading out the positive electrode of the battery cell body 210, and correspondingly, the other of the two battery cell tabs 220 is a negative battery cell tab 220 for leading out the negative electrode of the battery cell body 210. Correspondingly, the switching assembly 300 may include two switching tabs 310 and two first insulators 320, one of the two switching tabs 310 is connected with the battery cell tab 220 of the positive electrode to form the switching tab 310 of the positive electrode, and then the battery cell tab 220 of the positive electrode and the positive electrode of the device to be powered are connected through the switching tab 310 of the positive electrode, the other one of the two switching tabs 310 is connected with the battery cell tab 220 of the negative electrode to form the switching tab 310 of the negative electrode, and then the battery cell tab 220 of the negative electrode and the negative electrode of the device to be powered are connected through the switching tab 310 of the negative electrode. The battery cell tab 220 is connected with the device to be powered through the switching tab 310, so that the battery cell tab 220 is prevented from being pulled in the production process, and the battery cell tab 220 is prevented from being broken. The first insulating member 320 is used for insulating and protecting the switching tab 310, so as to avoid the switching tab 310 from being shorted, thereby causing the short circuit of the battery cell 200.

The switching tab 310 may include a sheet body 311 and a pin 312, where the sheet body 311 is connected to the battery cell tab 220, and the extending directions of the two are consistent, and the pin 312 is bent relative to the sheet body 311, so that the battery cell tab 220 and the sheet body 311 do not occupy too much space of the accommodating cavity, so as to improve the energy density of the battery. Moreover, the first insulating member 320 is fixedly connected with the housing 100, and the pins 312 are fixedly connected with the first insulating member 320, so that when the pins 312 are subjected to tensile force, the pins 312 cannot move relative to the housing 100 due to the fixing action of the first insulating member 320 and the housing 100, and the tensile force cannot be transmitted to the battery cell tab 220 in the accommodating cavity, so that the battery cell tab 220 can be prevented from being broken.

For example, the first insulating member 320 is integrally formed with the housing 100 by means of a thermal fusion connection after the cell body 210 and the housing 100 are packaged, thereby connecting the leads 312 and the housing 100.

The battery provided by the embodiment of the utility model comprises a shell 100, a battery cell 200 and a switching assembly 300, wherein the battery cell 200 comprises a battery cell body 210 and a battery cell tab 220, the switching assembly 300 comprises a switching tab 310 and a first insulating piece 320, and the switching tab 310 comprises a sheet 311 and a pin 312. The battery cell 200 is used for charging and discharging to form current by arranging the battery cell body 210, the battery cell tab 220 is used for leading out the positive electrode and the negative electrode of the battery cell body 210, the switching component 300 is used for connecting the battery cell tab 220 and a device to be powered by arranging the switching tab 310, the switching tab 310 is used for insulating and protecting the switching tab 310 by arranging the first insulating piece 320 so as to prevent the switching tab 310 from being short-circuited, the switching tab 310 is used for being connected with the battery cell tab 220 by arranging the sheet body 311 and is connected with the device to be powered by arranging the pin 312, the pin 312 and the sheet body 311 are arranged at an included angle, and the battery cell tab 220 is attached to the side face of the battery cell body 210, so that the space occupied by the sheet body 311 and the battery cell tab 220 is reduced, the battery energy density of the battery is improved, the pin 312 and the housing 100 are fixedly connected by the first insulating piece 320 so that the tensile force received by the switching tab 310 is prevented from being transmitted to the battery cell tab 220, and the battery cell tab 220 is prevented from being broken. Therefore, the battery of the embodiment of the utility model has higher energy density, and the battery cell tab 220 is not easy to break.

In one possible implementation, the cell body 210 includes a plurality of plates, which are stacked in sequence, and the extending direction of the cell tab 220 is consistent with the stacking direction of the plates.

That is, the plurality of electrode plates are stacked to form the cuboid-shaped battery cell body 210, and the battery cell tab 220 is bent relative to the battery cell body 210, so that the extending direction of the battery cell tab 220 is consistent with the stacking direction of the electrode plates, and the extending length of the battery cell tab 220 relative to the battery cell body 210 is smaller, so that the occupied space of the battery cell tab 220 can be reduced, and the battery energy density of the battery is improved.

Referring to fig. 2, 3, 6 and 7, as an alternative embodiment, the case 100 includes a first case 110 and a second case 120 disposed along a stacking direction of the electrode plates, the first case 110 and the second case 120 being connected to collectively enclose a receiving cavity, and the pins 312 are disposed between the first case 110 and the second case 120.

Accordingly, the first case 110 and the second case 120 may form a receiving cavity for receiving the battery cell 200 and the electrolyte, and in addition, the pins 312 are fixedly connected between the first case 110 and the second case 120 such that the pins 312 extend out of the receiving cavity through a gap between the first case 110 and the second case 120 to connect the battery cell tab 220 and the device to be powered. And the pins 312 are fixedly connected to the first housing 110 and the second housing 120 through the first insulating member 320, so that the pins 312 are fixedly connected to the housing 100 through the first insulating member 320.

To further increase the battery energy density of the battery, in some embodiments, the extending direction of the sheet 311 coincides with the stacking direction of the plates, and the angle between the pin 312 and the sheet 311 is greater than or equal to 70 ° and less than or equal to 110 °.

In this way, the sheet 311 is bent relative to the battery cell body 210, so that the extending direction of the sheet 311 is consistent with the stacking direction of the electrode plates, and the length of the sheet 311 extending out relative to the battery cell body 210 is smaller, so that the occupied space of the sheet 311 can be reduced, and the battery energy density of the battery can be improved.

It should be appreciated that if the angle between the pin 312 and the sheet 311 is less than 70 °, the pin 312 and the sheet 311 may be less likely to break. Since the case 100 includes the first case 110 and the second case 120, if the angle between the pins 312 and the sheet 311 is greater than 110 °, connection of the first case 110 and the second case 120 is inconvenient, and battery packaging is inconvenient. Therefore, the included angle between the pin 312 and the sheet 311 is between 70 ° and 110 °, which not only improves the strength of the switching tab 310, but also facilitates the package of the battery cell 200 by the housing 100.

Referring to fig. 2 and 7, in some embodiments, the first housing 110 has a plate shape, the second housing 120 has a first placement groove 121, a notch of the first placement groove 121 faces the first housing 110, and the sheet 311 is disposed in the first placement groove 121.

That is, the first housing 110 is covered and connected to the second housing 120 to close the notch of the first placement groove 121, thereby forming a receiving cavity, and the battery cell 200 is placed in the first placement groove 121, so that the sheet 311 is disposed in the first placement groove 121 to be connected to the battery cell tab 220.

Alternatively, referring to fig. 3 and 6, in some embodiments, the first housing 110 has a second placement groove 111, the second housing 120 has a third placement groove 122, the second placement groove 111 is opposite to the notch of the third placement groove 122, a part of the sheet 311 is disposed in the second placement groove 111, and another part of the sheet 311 is disposed in the third placement groove 122.

Thus, the first placing groove 121 and the second placing groove 111 together form a containing cavity, a part of the battery cell tab 220 is located in the second placing groove 111, and another part of the battery cell tab 220 is located in the third placing groove 122, so that a part of the sheet body 311 is located in the second placing groove 111 to be connected with the battery cell tab 220 located in the second placing groove 111, and another part of the sheet body 311 is located in the third placing groove 122 to be connected with the battery cell tab 220 located in the third placing groove 122.

Referring to fig. 6, in the embodiment, the pin 312 includes an exposed section 3121, a connection section 3122 and a built-in section 3123 connected in sequence, the exposed section 3121 and the connection section 3122 are disposed outside the accommodating cavity, the first insulating member 320 is connected to the connection section 3122, the built-in section 3123 is disposed inside the accommodating cavity, and the built-in section 3123 is connected to the sheet body 311.

Thus, the pin 312 is fixedly connected to the housing 100 by providing the connection section 3122 for fixedly connecting the pin 312 to the first insulating member 320, and further, the pin 312 is fixedly connected to the device to be powered by providing the exposed section 3121 for connecting to the cell tab 220 by providing the built-in section 3123.

Referring to fig. 8 to 10, in some embodiments, the battery tab 220 includes at least one tab group 221, the tab group 221 includes at least one foil tab, the foil tab is bent toward a center plane of the battery body 210 in a stacking direction, the sheet 311 is disposed between the battery body 210 and the tab group 221, and the sheet 311 is connected to the foil tab.

After the foil tab is bent to form the tab group 221, the sheet 311 is fixed between the cell body 210 and the tab group 221 and connected with the foil tab close to the cell body 210, so that the switching tab 310 is connected with the tab group 221 and the device to be powered, and the switching tab 310 is connected with the cell tab 220 and the device to be powered.

Referring to fig. 9 and 10, in one possible implementation, the number of tab groups 221 is two, the two tab groups 221 are bent toward the center plane of the stacking direction of the cell body 210, and the projections of the two tab groups 221 on the center plane of the stacking direction of the cell body 210 at least partially overlap.

For example, the positive electrode cell tab 220 may include a first tab group 221a and a second tab group 221b, where the first tab group 221a includes one or more foil tabs, the second tab group 221b includes one or more foil tabs, the foil tabs of the first tab group 221a and the foil tabs of the second tab group 221b are located at two sides of a central plane of the stacking direction of the cell body 210, the foil tabs of the first tab group 221a are bent toward the central plane of the stacking direction of the cell body 210, and the foil tabs of the second tab group 221b are also bent toward the central plane of the stacking direction of the cell body 210, that is, the bending directions of the foil tabs of the first tab group 221a and the foil tabs of the second tab group 221b are oppositely arranged. Similarly, the structure of the cell tab 220 of the negative electrode is the same as that of the cell tab 220 of the positive electrode, except that the polarities of the two are opposite.

The foil tab of the first tab group 221a and the foil tab of the second tab group 221b may be bent symmetrically or asymmetrically with respect to the center plane of the stacking direction of the cell body 210.

It will be appreciated that, in the specific arrangement, the projections of the two tab groups 221 on the center plane of the stacking direction of the cell body 210 may be partially overlapped, as shown in fig. 10, or the projections of the two tab groups 221 on the center plane of the stacking direction of the cell body 210 may be fully overlapped, as shown in fig. 9, according to the requirement.

Referring to fig. 6 and 7, in a specific implementation, the sheet body 311 includes a first welding connection region 3111 and a second welding connection region 3112, one tab group 221 is welded to the first welding connection region 3111, and the other tab group 221 is welded to the second welding connection region 3112.

Thus, when the battery tab 220 includes two tab groups 221, for example, the battery tab 220 includes a first tab group 221a and a second tab group 221b, the first tab group 221a may be welded to the sheet 311 through the first welding connection area 3111, and the second tab group 221b may be welded to the sheet 311 through the second welding connection area 3112, so that both tab groups 221 are connected to the sheet 311.

Referring to fig. 6 to 10, in order to avoid a short circuit of the battery, in one possible implementation, the adapter assembly 300 further includes a second insulating member 330, the second insulating member 330 is disposed between the cell body 210 and the sheet body 311, the second insulating member 330 is adhered to the cell body 210, and a projection of the sheet body 311 along the stacking direction of the electrode plates is located in the second insulating member 330. Thus, the second insulating member 330 can cover the sheet 311 entirely, so as to form an insulating protection layer between the sheet 311 and the cell body 210, thereby preventing the short circuit of the battery caused by the contact between the sheet 311 and the cell body 210.

Referring to fig. 5 and 8 to 10, in some embodiments, the adapter assembly 300 further includes a third insulating member 340, the third insulating member 340 is disposed between the tab group 221 and the inner wall of the housing 100, and a projection of the tab group 221 along the stacking direction of the electrode plates is located in the third insulating member 340.

In this way, the third insulating member 340 may cover the tab group 221 entirely, and the third insulating member 340 may insulate the tab group 221 from the inner wall of the case 100, so as to prevent the tab group 221 from contacting the inner wall of the case 100 to cause short circuit of the battery.

In addition, in order to avoid the third insulator 340 from affecting the extension of the leads 312 to the outside of the case 100, the third insulator 340 and the leads 312 may be disposed to be offset from each other, that is, the projection of the third insulator 340 in the stacking direction of the electrode plates and the projection of the leads 312 in the stacking direction of the electrode plates do not overlap.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. The battery is characterized by comprising a shell, a battery cell and an adapter component, wherein the shell is provided with an accommodating cavity, the battery cell is accommodated in the accommodating cavity, and the battery cell comprises a battery cell body and a battery cell tab which are connected with each other;

the switching subassembly include the switching utmost point ear, and with the first insulating part that switching utmost point ear one-to-one set up, the switching utmost point ear includes interconnect's lamellar body and pin, lamellar body with the pin is the contained angle setting, lamellar body one-to-one connect in electric core utmost point ear, first insulating part fixed connection in the casing, pin fixed connection in first insulating part, just the pin passes through first insulating part extends to hold outside the chamber.

2. The battery according to claim 1, wherein the cell body includes a plurality of electrode plates, the plurality of electrode plates are stacked in order, and the extending direction of the cell tab is identical to the stacking direction of the electrode plates.

3. The battery according to claim 2, wherein the case includes a first case and a second case provided in a stacking direction of the electrode plates, the first case and the second case being connected to collectively enclose the accommodation chamber;

the pin is arranged between the first shell and the second shell.

4. The battery of claim 3, wherein the sheet extends in a direction that is consistent with the stacking direction of the plates, and wherein the angle between the lead and the sheet is greater than or equal to 70 ° and less than or equal to 110 °.

5. The battery according to claim 4, wherein the first housing has a plate shape, the second housing has a first placement groove, a notch of the first placement groove faces the first housing, and the sheet body is provided in the first placement groove.

6. The battery of claim 4, wherein the first housing has a second slot, the second housing has a third slot, the second slot is opposite to the notch of the third slot, a portion of the sheet is disposed in the second slot, and another portion of the sheet is disposed in the third slot.

7. The battery of any of claims 2-6, wherein the pin comprises an exposed section, a connecting section, and a built-in section connected in sequence, the exposed section and the connecting section being disposed outside the receiving cavity, the first insulating member being connected to the connecting section, the built-in section being disposed within the receiving cavity, and the built-in section being connected to the sheet.

8. The battery of claim 7, wherein the cell tab comprises at least one tab group, the tab group comprises at least one foil tab, the foil tab is bent toward a center plane of the cell body in a stacking direction, the sheet is disposed between the cell body and the tab group, and the sheet is connected with the tab group.

9. The battery according to claim 8, wherein the number of the tab groups is two, the two tab groups are bent toward a center plane of the cell body in the stacking direction, and projections of the two tab groups on the center plane of the cell body in the stacking direction are at least partially overlapped.

10. The battery of claim 9, wherein the sheet body includes a first welded connection and a second welded connection, one tab group being welded to the first welded connection and the other tab group being welded to the second welded connection.

11. The battery of claim 10, further comprising a second insulator disposed between the cell body and the sheet, the second insulator being bonded to the cell body, and a projection of the sheet along a stacking direction of the plates being located within the second insulator.

12. The battery of claim 11, further comprising a third insulator disposed between the tab group and an inner wall of the case, and a projection of the tab group along a stacking direction of the electrode plates is located within the third insulator.