CN217768572U - Naked electric core, battery and terminal equipment - Google Patents

Abstract

The application discloses naked electric core, battery and terminal equipment belongs to battery design technical field. This naked electric core includes: the battery comprises a first battery cell body, a second battery cell body, a first group of lugs and a second group of lugs; one side of the first battery cell body is provided with a first accommodating part, and the second battery cell body is positioned in the first accommodating part; the first group of tabs is connected with the first battery cell body, and the second group of tabs is connected with the second battery cell body and extends out of one end of the first battery cell body. This scheme of adoption, when the battery takes place to fall, first electric core body plays certain cushioning effect to second electric core body, is favorable to weakening the damage that second electric core body received. Therefore, when the first battery cell body is not used due to falling, the second battery cell body can still normally work, and therefore the working reliability of the whole battery is improved.

Description

Naked electric core, battery and terminal equipment

Technical Field

The application relates to the technical field of battery design, in particular to a naked electric core, a battery and terminal equipment.

Background

Since the successful commercial application of batteries, batteries have been widely used in the fields of portable electronic devices (such as mobile phones, tablet computers, notebook computers, etc.), electric vehicles, energy storage, etc. The user is when using electronic product, and the condition that electronic product fell can take place to be inevitable, falls to make the naked electric core in the battery receive the damage, leads to naked electric core to become invalid easily to, lead to the unable normal work of battery.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a naked electric core, battery and terminal equipment, can solve among the correlation technique because fall and lead to naked electric core to become invalid to lead to the unable normal problem of working of battery. The technical scheme is as follows:

in a first aspect, the present application provides a naked electric core, naked electric core includes: the battery comprises a first battery cell body, a second battery cell body, a first group of lugs and a second group of lugs;

one side of the first battery cell body is provided with a first accommodating part, and the second battery cell body is positioned in the first accommodating part;

the first group of tabs are connected with the first cell body, the second group of tabs are connected with the second cell body, and one end of each tab, opposite to the first cell body, extends out.

In a possible implementation manner, the first cell body includes a plurality of first pole pieces, a plurality of second pole pieces, and a plurality of first diaphragms, the plurality of first pole pieces, the plurality of second pole pieces, and the plurality of first diaphragms are stacked and arranged to be a block structure, and the first accommodating portion is a through hole penetrating through the plurality of first pole pieces, the plurality of second pole pieces, and the plurality of first diaphragms, or a groove penetrating through a part of the first pole pieces, a part of the second pole pieces, and a part of the first diaphragms.

In a possible implementation manner, the first cell body includes a third pole piece, a fourth pole piece, and at least one second diaphragm,

the third pole piece, the fourth pole piece and the second diaphragm are superposed and wound to form a blocky structure, and the first accommodating part is a through hole penetrating through the third pole piece, the fourth pole piece and the second diaphragm, or a groove penetrating through part of the third pole piece, part of the fourth pole piece and part of the second diaphragm.

In a possible implementation manner, the bare cell further includes a cell insulation interlayer, and the cell insulation interlayer is located between the inner wall of the first accommodating portion and the second cell body.

In one possible implementation manner, the first group of tabs and the second group of tabs are located at the same end of the first cell body.

In a possible implementation manner, the tabs in the second group of tabs include an extension portion, a bending portion and a connecting portion, which are sequentially connected, one end of the extension portion is connected to the second cell body, the other end of the extension portion extends to one end of the first cell body, the bending portion is opposite to the end surface of the first cell body, and the connecting portion is bent relative to the bending portion and extends in a direction away from the end surface of the first cell body;

naked electric core still includes utmost point ear insulating interlayer, utmost point ear insulating interlayer is located the terminal surface of first electric core body with between the kink.

In a possible implementation manner, the bare cell further includes a third cell body and a third group of tabs;

one side of the second cell body is provided with a second accommodating part, and the third cell body is positioned in the second accommodating part;

the third group of tabs is connected with the third battery cell body and extends out of one end of the first battery cell body.

In a possible implementation manner, the bare cell further includes a fourth cell body and a fourth group of tabs;

a third accommodating part is further arranged on one side of the first battery cell body, and the fourth battery cell body is located in the third accommodating part;

the fourth group of tabs is connected with the fourth cell body, and one end of the fourth group of tabs, which is opposite to the first cell body, extends out.

In a second aspect, the present application provides a battery comprising a bare cell and a casing as described in any of the first aspect and its possible implementations, the bare cell being located within the casing.

In a possible implementation, the battery further includes a battery core protection diaphragm, the battery core protection diaphragm is wrapped outside the bare battery core, and is attached to the inner wall of the casing.

In a third aspect, the present application provides a terminal device, where the terminal device includes the bare cell according to any one of the first aspect and possible implementations thereof, or the battery according to the second aspect and possible implementations thereof.

The technical scheme provided by the embodiment of the application has the following beneficial effects:

in the scheme that this application embodiment provided, naked electric core has two electric core bodies and two sets of utmost point ear, and two sets of utmost point ears link to each other with two electric core bodies respectively for be linked together two electric core bodies with external circuit respectively. This scheme of adoption, when the battery takes place to fall, first electric core body plays certain cushioning effect to second electric core body, is favorable to weakening the damage that second electric core body received. Therefore, when the first battery cell body is out of service due to falling, the second battery cell body can still normally work, and therefore the working reliability of the whole battery is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

fig. 2 is a schematic structural diagram of a first cell body according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a first cell body according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a first cell body according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a first cell body according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a bare cell provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a cell insulation barrier layer provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a cell insulation barrier layer provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a bare cell provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of a bare cell provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of a battery provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a battery provided in an embodiment of the present application;

fig. 13 is a schematic structural diagram of a battery provided in an embodiment of the present application.

Description of the drawings

1. A first cell body; 2. a second cell body; 3. a first group of tabs; 4. a second group of tabs; 5. a cell insulation interlayer; 6. a tab insulation interlayer; 7. a third cell body; 8. a third group of tabs; 9. a fourth cell body; 10. a fourth group of tabs;

1A, a first accommodating part; 1B, a third housing part; 2A, a second accommodating part; 4A, an extension part; 4B, bending; 4C, a connecting part;

11. a first pole piece; 12. a second pole piece; 13. a first separator; 14. a third pole piece; 15. a fourth pole piece; 16. a second diaphragm; 51. a first side plate; 52. a second side plate; 53. a third side plate; 54. a fourth side plate; 55. a base plate;

01. a naked battery cell; 02. a housing; 03. a cell protection diaphragm; 04. a protection circuit board; 05. a nickel sheet set; 06. a flexible circuit board; 07. a top gummed paper; 08. lateral gummed paper.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," "third," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a bare cell provided in an embodiment of the present application. As shown in fig. 1, this naked electric core includes: the battery comprises a first battery cell body 1, a second battery cell body 2, a first group of lugs 3 and a second group of lugs 4. One side of the first cell body 1 has a first accommodation portion 1A, and the second cell body 2 is located in the first accommodation portion 1A. The first group of tabs 3 is connected with the first cell body 1, the second group of tabs 4 is connected with the second cell body 2, and the second group of tabs 4 extends out relative to one end of the first cell body 1.

The naked electric core that this application embodiment provided has two electric core bodies and two sets of utmost point ear, and two sets of utmost point ears link to each other with two electric core bodies respectively for be linked together two electric core bodies with external circuit respectively. When the battery falls, the first battery cell body 1 plays a certain buffering role for the second battery cell body 2, and the damage to the second battery cell body 2 is favorably reduced. Therefore, when the first cell body 1 is dropped to cause the first cell body to be unusable, the second cell body 2 can still normally work, thereby being beneficial to improving the working reliability of the whole battery.

Moreover, adopt this scheme, in the battery that uses this naked electric core, two electric core bodies are encapsulated in same casing, and these two electric core bodies exist in same electrochemical environment, consequently, in the in-process of charging, discharging, have reduced the probability that two electric core bodies take place the phenomenon of imbalance, are favorable to improving the life of this battery.

The first cell body 1 may have a laminated structure or a wound structure. The second battery cell body 2 may have a laminated structure or a wound structure. Because the structure of second electricity core body 2 is similar with the structure of the naked electric core in the correlation technique, this is repeated for no reason. Next, a specific structure of the first cell body 1 in a laminated structure or a wound structure will be described:

when the first cell body 1 is a laminated structure

Fig. 2 is a schematic structural diagram of a first cell body according to an embodiment of the present application. As shown in fig. 2, the first cell body 1 may include a plurality of first pole pieces 11, a plurality of second pole pieces 12, and a plurality of first diaphragms 13, the plurality of first pole pieces 11, the plurality of second pole pieces 12, and the plurality of first diaphragms 13 are stacked and arranged to form a block structure, and the first accommodating portion 1A is a through hole penetrating through the plurality of first pole pieces 11, the plurality of second pole pieces 12, and the plurality of first diaphragms 13.

In this example, each of the first pole piece 11, each of the second pole piece 12, and each of the first diaphragm 13 may be in a shape of a "zigzag", that is, the first pole piece 11, the second pole piece 12, and the first diaphragm 13 each have a through hole in the middle thereof, and in the above block structure, the through hole of the first pole piece 11, the through hole of the second pole piece 12, and the through hole of the first diaphragm 13 are opposed, and at this time, these through holes form the first accommodation portion 1A.

Optionally, fig. 3 is a schematic structural diagram of a first battery cell body provided in an embodiment of the present application. As shown in fig. 3, in the block structure formed by the plurality of first pole pieces 11, the plurality of second pole pieces 12, and the plurality of first diaphragms 13, a part of the first pole pieces 11, a part of the second pole pieces 12, and a part of the first diaphragms 13 have through holes, another part of the first pole pieces 11, another part of the second pole pieces 12, and another part of the first diaphragms 13 do not have through holes, and the through holes of the first pole pieces 11, the second pole pieces 12, and the first diaphragms 13 are opposed to each other, so that a recess, i.e., a first receiving portion 1A, is formed by the through holes.

When the first cell body 1 is in a winding structure

Fig. 4 is a schematic structural diagram of a first cell body provided in an embodiment of the present application. As shown in fig. 4, the first cell body 1 includes a third pole piece 14, a fourth pole piece 15 and at least one second membrane 16, the third pole piece 14, the fourth pole piece 15 and the at least one second membrane 16 are stacked and wound in a block structure, and the first accommodating portion 1A is a through hole penetrating through the third pole piece 14, the fourth pole piece 15 and the at least one second membrane 16.

In some examples, the third pole piece 14, the fourth pole piece 15, and the second diaphragm 16 each have a plurality of through holes, and in a block structure formed by winding the third pole piece 14, the fourth pole piece 15, and the at least one second diaphragm 16, the through holes in the third pole piece 14, the fourth pole piece 15, and the second diaphragm 16 are distributed on opposite sides of the block structure, and the through holes are arranged in pairs, thereby forming the first accommodation portion 1A described above.

Optionally, fig. 5 is a schematic structural diagram of a first cell body provided in an embodiment of the present application. As shown in fig. 5, the first cell body 1 includes a third pole piece 14, a fourth pole piece 15 and a second diaphragm 16, and in the block-shaped structure formed by winding the third pole piece 14, the fourth pole piece 15 and the second diaphragm 16, the first accommodating portion 1A is a groove penetrating through a portion of the third pole piece 14, a portion of the fourth pole piece 15 and a portion of the second diaphragm 16.

Fig. 6 is a schematic structural diagram of a bare cell provided in an embodiment of the present application. As shown in fig. 6, the bare cell may further include a cell insulation interlayer 5, where the cell insulation interlayer 5 is located between the inner wall of the first accommodating portion 1A and the second cell body 2, the cell insulation interlayer 5 is an insulation material layer, and the cell insulation interlayer 5 is attached to the first cell body 1 and/or the second cell body 2, so as to ensure stability of the cell in the bare cell. By adopting the scheme, the cell insulating interlayer 5 can block ions in the liquid electrolyte from moving between the first cell body 1 and the second cell body 2, so that the first cell body 1 and the second cell body 2 are prevented from short circuit, and the stability of the battery during operation is improved.

Fig. 7 is a schematic structural diagram of a cell insulation barrier layer provided in an embodiment of the present application. In some examples, as shown in fig. 7, when the first accommodating portion 1A is a through hole structure, the cell insulating interlayer 5 may include two first side plates 51 and two second side plates 52. The two first side plates 51 are oppositely arranged, and the two second side plates 52 are located between the two first side plates 51 and are respectively connected with the two first side plates 51.

Fig. 8 is a schematic structural diagram of a cell insulation barrier layer provided in an embodiment of the present application. In other examples, as shown in fig. 8, when the first receiving portion 1A has a groove structure, the cell insulating interlayer 5 may include two third side plates 53, two fourth side plates 54, and one bottom plate 55. The two third side plates 53 and the two fourth side plates 54 are located on the same side of the bottom plate 55 and are respectively connected to the bottom plate 55, the two third side plates 53 are oppositely arranged, and the two fourth side plates 54 are located between the two third side plates 53 and are respectively connected to the two third side plates 53.

Referring to fig. 6, the first group of tabs 3 and the second group of tabs 4 may be located at the same end of the first cell body 1, so as to connect the two groups of tabs to the same protection circuit, which is beneficial to reducing the complexity of the external circuit.

Optionally, the first group of tabs 3 and the second group of tabs 4 may be located at different ends of the first battery cell body 1, and when the battery is used, the first group of tabs 3 and the second group of tabs 4 may be connected to a circuit of the electronic device in a near manner to supply power, respectively, or may be charged and discharged through different circuits. Therefore, when one of the battery cell bodies is damaged, the charging and discharging processes of the other battery cell body are not influenced.

The first group of tabs 3 may include two tabs, and the second group of tabs 4 may also include two tabs. Referring to fig. 6, the tab of the second group of tabs 4 includes an extension portion 4A, a bending portion 4B and a connecting portion 4C, which are connected in sequence, one end of the extension portion 4A is connected to the second cell body 2, the other end of the extension portion 4A extends to one end of the first cell body 1, and extends out of one end of the first cell body 1, the bending portion 4B is opposite to the end surface of the first cell body 1, and a gap is formed between the end surface of the first cell body 1 and the end surface of the first cell body 1, and the connecting portion 4C is bent relative to the bending portion 4B and extends in the direction away from the end surface of the first cell body 1. By adopting the scheme, the connecting part 4C of the second group of the tabs 4 and the first group of the tabs 3 can be positioned at the same height, so that the two groups of the tabs are connected with an external protection circuit.

Referring to fig. 6, the bare cell may further include a tab insulating interlayer 6, where the tab insulating interlayer 6 is located between the end surface of the first cell body 1 and the bending portion 4B of the second group of tabs 4 to prevent the end of the pole piece from contacting with the end of the first cell body 1, so as to prevent short circuit between the first cell body 1 and the second cell body 2 and improve the safety of the battery.

Optionally, the tabs in the second group of tabs 2 may include a metal layer and an insulating layer, the insulating layer is wrapped outside the metal layer, the metal layer is used for connecting with an external circuit to complete charging and discharging processes, and the insulating layer is used for preventing the tabs from short-circuiting with the first cell body 1, so as to improve the safety of the battery.

Fig. 9 is a schematic structural diagram of a bare cell provided in an embodiment of the present application. As shown in fig. 9, the bare cell may further include a third cell body 7 and a third group of tabs 8. One side of the second cell body 2 has a second accommodating portion 2A, and the third cell body 7 is located in the second accommodating portion 2A, where the second accommodating portion 2A may be a through hole structure or a groove structure. The third group of tabs 8 is connected to the third cell body 7, and the third group of tabs 8 extends out from one end of the first cell body 1.

Fig. 10 is a schematic structural diagram of a bare cell provided in an embodiment of the present application. As shown in fig. 10, the bare cell may further include a fourth cell body 9 and a fourth group of tabs 10. One side of the first cell body 1 may have a third accommodating portion 1B in addition to the first accommodating portion 1A, and the fourth cell body 9 is located in the third accommodating portion 1B, where the third accommodating portion 1B may be a through hole structure or a groove structure. When the first accommodating portion 1A and the third accommodating portion 1B are both groove structures, the first accommodating portion 1A and the third accommodating portion 1B may be located on the same side of the first cell body 1, or may be located on different sides of the first cell body 1, and this is not limited here. A fourth group of tabs 10 is connected to the fourth cell body 9, and one end of the fourth group of tabs 10 opposite to the first cell body 1 extends out.

Optionally, this naked electric core can also include more than three electric core bodies, and at this moment, the structure of naked electric core has similar structure with two kinds of situations that fig. 9, fig. 10 show, and the repeated description is not repeated here.

Adopt this scheme, can increase the quantity of electric core body in the naked electric core, after encapsulating naked electric core for the battery, the battery that has a plurality of electric core bodies can bear higher voltage, is favorable to improving the charge rate of battery.

Based on the same technical concept, the embodiment of the present application provides a battery, and fig. 11 is a schematic structural diagram of the battery provided in the embodiment of the present application. As shown in fig. 11, the battery includes any bare cell 01 and a casing 02 provided in the embodiment of the present application, the bare cell 01 is located in the casing 02, wherein the casing 02 may be a steel shell, and may be an aluminum-plastic film.

Fig. 12 is a schematic structural diagram of a battery provided in an embodiment of the present application. As shown in fig. 12, the battery may further include a battery cell protection diaphragm 03, the battery cell protection diaphragm 03 wraps the bare battery cell 01, and is attached to the inner wall of the housing 02, wherein the battery cell protection diaphragm 03 may be a polyolefin film mainly made of a polyethylene film or a polypropylene film. The electric core protection diaphragm 03 can be used for mechanically isolating the bare electric core 01 from the shell 02, so that short circuit is prevented, certain buffering effect can be achieved on the bare electric core 01 when the battery falls, and damage to the bare electric core 01 is weakened.

Fig. 13 is a schematic structural diagram of a battery provided in an embodiment of the present application. As shown in fig. 13, the battery may further include a protection circuit board 04, a nickel plate set 05, a flexible circuit board 06, a top adhesive sheet 07, and a side adhesive sheet 08. The protection circuit board 04 is positioned on one side of the bare cell 01, which is provided with a tab, and is used for bearing a protection circuit of the whole battery; the nickel sheet set 05 is positioned on the protection circuit board 04, the nickel sheet set 05 comprises a plurality of nickel sheets, each nickel sheet is opposite to one electrode lug, and the nickel sheet set 05 is respectively connected with the protection circuit board 04 and the electrode lugs of the bare cell 01; the flexible circuit board 06 is located on one side of the protection circuit board 04 away from the bare cell 01, is connected with the protection circuit board 04, and is used for connecting the battery with an external circuit; the top gummed paper 07 is wrapped outside the protection circuit board 04, the side gummed paper 08 is wrapped outside the shell 02, and the top gummed paper 07 and the side gummed paper 08 can be made of polyimide gummed paper so as to play a role in decoration and protection.

By adopting the scheme, the two battery cell bodies are packaged in the same shell, and the two battery cell bodies exist in the same electrochemical environment, so that the probability of unbalanced phenomenon of the two battery cell bodies is reduced in the charging and discharging processes, the service life of the battery is prolonged, and the charging efficiency and the working stability of the terminal equipment battery are improved.

Based on the same technical concept, the embodiment of the present application provides a terminal device, where the terminal device includes any bare cell 01 provided in the embodiment of the present application, or includes any battery provided in the embodiment of the present application. By adopting the scheme, the two battery cell bodies are packaged in the same shell, and the two battery cell bodies exist in the same electrochemical environment, so that the probability of unbalanced phenomena of the two battery cell bodies is reduced in the charging and discharging processes, the service life of the battery is prolonged, and the charging efficiency and the working stability of the terminal equipment battery are improved.

The above description is intended only to illustrate the alternative embodiments of the present application, and should not be construed as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (11)

1. The utility model provides a naked electric core, its characterized in that, naked electric core includes: the battery comprises a first battery cell body (1), a second battery cell body (2), a first group of tabs (3) and a second group of tabs (4);

one side of the first battery cell body (1) is provided with a first accommodating part (1A), and the second battery cell body (2) is positioned in the first accommodating part (1A);

the first group of lugs (3) is connected with the first battery cell body (1), the second group of lugs (4) is connected with the second battery cell body (2), and one end of the second battery cell body (1) extends out.

2. The bare cell according to claim 1, wherein the first cell body (1) comprises a plurality of first pole pieces (11), a plurality of second pole pieces (12), and a plurality of first diaphragms (13), the plurality of first pole pieces (11), the plurality of second pole pieces (12), and the plurality of first diaphragms (13) are stacked and arranged in a block structure, and the first accommodating portion (1A) is a through hole penetrating through the plurality of first pole pieces (11), the plurality of second pole pieces (12), and the plurality of first diaphragms (13), or a groove penetrating through a part of the first pole pieces (11), a part of the second pole pieces (12), and a part of the first diaphragms (13).

3. The bare cell according to claim 1, wherein the first cell body (1) comprises a third pole piece (14), a fourth pole piece (15) and at least one second membrane (16),

the third pole piece (14), the fourth pole piece (15) and the second diaphragm (16) are stacked and wound to form a block structure, and the first accommodating portion (1A) is a through hole penetrating through the third pole piece (14), the fourth pole piece (15) and the second diaphragm (16) or a groove penetrating through a part of the third pole piece (14), a part of the fourth pole piece (15) and a part of the second diaphragm (16).

4. The bare cell according to any of claims 1-3, further comprising a cell insulation barrier (5), wherein the cell insulation barrier (5) is located between the inner wall of the first receptacle (1A) and the second cell body (2).

5. The bare cell according to any of claims 1-3, wherein the first and second sets of tabs (3, 4) are located at the same end of the first cell body (1).

6. The bare cell core according to any one of claims 1 to 3, wherein the tabs of the second group of tabs (4) comprise an extension portion (4A), a bending portion (4B) and a connecting portion (4C) which are connected in sequence, one end of the extension portion (4A) is connected to the second cell body (2), the other end of the extension portion extends to one end of the first cell body (1), the bending portion (4B) is opposite to the end surface of the first cell body (1), and the connecting portion (4C) is bent relative to the bending portion (4B) and extends in a direction away from the end surface of the first cell body (1);

naked electric core still includes utmost point ear insulating interlayer (6), utmost point ear insulating interlayer (6) are located the terminal surface of first electric core body (1) with between kink (4B).

7. The bare cell according to any of claims 1-3, further comprising a third cell body (7) and a third set of tabs (8);

one side of the second cell body (2) is provided with a second accommodating part (2A), and the third cell body (7) is positioned in the second accommodating part (2A);

the third group of tabs (8) is connected with the third battery cell body (7) and extends out relative to one end of the first battery cell body (1).

8. The bare cell according to any of claims 1-3, further comprising a fourth cell body (9) and a fourth set of tabs (10);

one side of the first battery cell body (1) is also provided with a third accommodating part (1B), and the fourth battery cell body (9) is positioned in the third accommodating part (1B);

the fourth group of tabs (10) is connected with the fourth cell body (9), and one end of the fourth group of tabs (10) extends out relative to the first cell body (1).

9. A battery, characterized in that it comprises a bare cell (01) according to any of claims 1-8 and a casing (02), the bare cell (01) being located inside the casing (02).

10. The battery of claim 9, further comprising a cell protection membrane (03), wherein the cell protection membrane (03) wraps around the bare cell (01) and is attached to the inner wall of the housing (02).

11. A terminal device, characterized in that it comprises a bare cell (01) according to any of claims 1-8, or a battery according to claim 9 or 10.

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