CN218827305U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: a battery case; the explosion-proof valve is arranged on the battery shell; the battery core is arranged in the battery shell; the shielding piece is connected to the electric core so as to be fixedly connected with two opposite surfaces of the electric core; the explosion-proof valve and the shielding piece are arranged oppositely, and the orthographic projection of the shielding piece towards the plane where the explosion-proof valve is located coincides with a part of the explosion-proof valve. Through connecting shielding piece on electric core, thereby can two surfaces that fixed connection electric core is relative, tighten electric core with this, can reduce the possibility that exterior structure inserted electric core inside, thereby the safety performance of battery has been improved, and explosion-proof valve sets up with shielding piece relatively, and shielding piece coincides mutually towards explosion-proof valve place planar orthographic projection and explosion-proof valve's partly, on the basis that does not influence explosion-proof valve and normally explode, also can avoid explosion-proof valve to explode in advance, thereby the safety performance of battery has further been improved.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

In the related art, the battery core of the battery may be formed by a plurality of stacking portions, each stacking portion may include a positive electrode plate and a negative electrode plate, and after winding or stacking the battery core, a certain distance may exist between the electrode plates, so that there is a risk of inserting other structures, or after the battery core is used for a long time, the explosion-proof valve of the battery core may burst due to a large amount of heat generation, but due to the structural limitation of the battery core, an abnormal situation of the explosion-proof valve may occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a battery case;

the explosion-proof valve is arranged on the battery shell;

the battery core is arranged in the battery shell;

the shielding piece is connected to the battery cell so as to be fixedly connected with two opposite surfaces of the battery cell;

wherein, explosion-proof valve and shielding piece relative setting, and shielding piece towards explosion-proof valve place plane orthographic projection and explosion-proof valve partly coincide mutually.

The utility model discloses the battery includes battery case, explosion-proof valve, electric core and shielding piece, explosion-proof valve sets up on battery case, electric core sets up in battery case, through connecting shielding piece on electric core, thereby can two surfaces that fixed connection electric core is relative, tighten electric core with this, can reduce the possibility that exterior structure inserts electric core inside, thereby the safety performance of battery has been improved, and explosion-proof valve sets up with shielding piece relatively, and shielding piece orientation explosion-proof valve place planar orthographic projection coincides with a part of explosion-proof valve mutually, on the basis that does not influence explosion-proof valve normal explosion, also can avoid explosion-proof valve to explode in advance, and consider explosion-proof valve middle part to have certain storage gas's space, lead to gaseous long-term to concentrate on explosion-proof valve middle part, lead to explosion-proof valve to explode in advance, shelter from electric core just to the position of explosion-proof valve, can make gas disperse, and shielding piece orientation explosion-proof valve place planar orthographic projection and explosion-proof valve 20's a part coincide mutually, the size of explosion-proof piece can not too big again, can avoid the inside of battery unusual, gas rush, thereby lead to the emergence of explosion-proof valve, the safety risk that leads to further existence of blocking of shielding piece has been improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views.

Wherein:

FIG. 1 is a schematic diagram of a battery shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating the internal structure of a battery according to an exemplary embodiment;

fig. 3 is a partial structural schematic view of a battery according to a first exemplary embodiment;

fig. 4 is a schematic view showing a partial structure of a battery according to a second exemplary embodiment;

fig. 5 is a partial structural view of a battery according to a third exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a liquid injection hole; 12. a gas storage space; 20. an explosion-proof valve; 30. an electric core; 31. a first surface; 32. a second surface; 33. a first pole ear portion; 34. a second pole ear; 35. a third surface; 40. a shield; 50. an insulating structure; 60. the utmost point post subassembly.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element or elements "on," "under," or "inner" or "outer," it can be connected not only directly to the other element or elements "on," "under," or "inner" or "outer," but also indirectly to the other element or elements "on," "under," or "inner" or "outer" through intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to 5, the battery includes: a battery case 10; an explosion-proof valve 20, the explosion-proof valve 20 being provided on the battery case 10; the battery cell 30, the battery cell 30 is disposed in the battery case 10; the shielding piece 40 is connected to the battery cell 30, so as to fixedly connect two opposite surfaces of the battery cell 30; the explosion-proof valve 20 is arranged opposite to the shielding piece 40, and the orthographic projection of the shielding piece 40 towards the plane of the explosion-proof valve 20 is overlapped with a part of the explosion-proof valve 20.

The utility model discloses a battery of an embodiment includes battery case 10, explosion-proof valve 20, electric core 30 and shielding piece 40, explosion-proof valve 20 sets up on battery case 10, electric core 30 sets up in battery case 10, through connecting shielding piece 40 on electric core 30, thereby can two surfaces that fixed connection electric core 30 is relative, tighten electric core 30 with this, can reduce the possibility that the exterior structure inserts electric core 30 inside, thereby the safety performance of battery has been improved, and explosion-proof valve 20 sets up with shielding piece 40 relatively, and shielding piece 40 coincides with explosion-proof valve 20's the planar orthographic projection of explosion-proof valve 20 place partly, on the basis that does not influence explosion-proof valve 20 and normally explodes, also can avoid explosion-proof valve 20 to explode in advance, and consider that there is certain gaseous space of storage in the middle part of explosion-proof valve 20, lead to gaseous long-term concentrating on explosion-proof valve 20 middle part, lead to explosion-proof valve 20 in advance, just to explosion-proof valve 20's position, can make gas disperse, and explosion-proof valve 20 improves the inside shielding piece 40 and shielding piece 20 and the further the risk of the emergence of explosion-proof valve 20, thereby can avoid the internal risk of the emergence to further to exist.

It should be noted that the shielding member 40 is connected to the battery cell 30 to fixedly connect two opposite surfaces of the battery cell 30, that is, the battery cell 30 may be fastened by the shielding member 40, the battery cell 30 may include a positive electrode plate and a negative electrode plate, and the shielding member 40 may reduce a gap between the positive electrode plate and the negative electrode plate, so as to prevent an external component from being inserted into the gap formed by the battery cell 30, thereby improving the safety performance of the battery.

The explosion-proof valve 20 and the shielding piece 40 are arranged oppositely, and the orthographic projection of the shielding piece 40 towards the plane of the explosion-proof valve 20 coincides with a part of the explosion-proof valve 20, at the moment, the shielding piece 40 actually forms partial shielding for the explosion-proof valve 20, namely, the dispersion of gas is realized, and the excessive concentration of the gas on the explosion-proof valve 20 is avoided, so that the explosion-proof valve 20 is prevented from being exploded in advance, and even if the shielding piece 40 is abnormally separated, the shielding piece 40 cannot completely shield the explosion-proof valve 20, so that the gas can still break through the explosion-proof valve 20, and the safe use of the battery is ensured.

For example, a certain space for storing gas exists in the middle of the explosion-proof valve 20, which causes the gas to be concentrated in the middle for a long time, and causes the explosion-proof valve 20 to explode in advance, and the shielding piece 40 shields the place, which is opposite to the explosion-proof valve 20, of the battery cell 30, so that the gas can be dispersed. The size of the shielding member 40 cannot be too large, and when the inside of the battery is abnormal, the shielding member 40 is flushed away by gas, so that the shielding member 40 blocks the explosion-proof valve 20, and there is a risk that the explosion-proof valve 20 is difficult to release pressure.

In one embodiment, as shown in fig. 3, the battery cell 30 includes a first surface 31 and a second surface 32 opposite to each other, and the shielding member 40 is fixedly connected to the first surface 31 and the second surface 32, so that a gap between the first surface 31 and the second surface 32 can be reduced, thereby preventing an external component from being inserted between the first surface 31 and the second surface 32, and improving the safety performance of the battery cell 30.

In one embodiment, the ratio of the width of the explosion-proof valve 20 to the width of the shielding member 40 in the direction parallel to the first surface 31 and the second surface 32 is 0.2-0.6, which not only can avoid the problem that the shielding member 40 has too large width and the explosion-proof valve 20 cannot be exploded, but also can realize the dispersion of gas by the shielding member 40 and avoid the problem that the explosion-proof valve 20 is exploded in advance.

The ratio of the width of the explosion-proof valve 20 to the width of the shutter 40 may be 0.2, 0.21, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.58, 0.59, or 0.6, etc.

In one embodiment, the first surface 31 and the second surface 32 are large surfaces of the battery cell 30, so as to ensure that the shielding member 40 can be reliably fixed on the battery cell 30, thereby improving the tightness of the battery cell 30 and avoiding the safety risk caused by the external structure inserted between the first surface 31 and the second surface 32.

The first surface 31 and the second surface 32 are large surfaces of the battery cell 30, that is, the first surface 31 and the second surface 32 are surfaces where the area of the battery cell 30 is the largest, and further, the first surface 31 and the second surface 32 are surfaces where the heat generated by the battery cell 30 is the largest.

In one embodiment, as shown in fig. 3, the battery cell 30 further includes a third surface 35, the third surface 35 is located between the first surface 31 and the second surface 32, the third surface 35 is disposed opposite to the explosion-proof valve 20, and the shielding member 40 is further connected to the third surface 35, so as to prevent external components from being inserted into the battery cell 30 from the third surface 35, thereby ensuring the safety performance of the battery.

In one embodiment, the shielding member 40 is bonded to the battery cell 30, which not only improves the connection stability of the shielding member 40, but also facilitates the arrangement of the shielding member 40, thereby improving the manufacturing efficiency of the battery.

In one embodiment, the shielding member 40 is an insulating film, which is not only simple in structure and convenient to be disposed on the battery cell 30, but also the weight of the insulating film is not too large, so as to avoid the problem of too large weight of the battery cell 30.

The shielding member 40 may also be a cable tie or the like, and is not limited herein, and the shielding member 40 is used to fasten the battery cell 30.

In one embodiment, as shown in fig. 1, the battery case 10 is provided with a pour hole 11, and the shutter 40 is disposed opposite to the surface of the battery case 10 provided with the pour hole 11; the orthographic projection of the blocking piece 40 towards the plane where the liquid injection hole 11 is located is not overlapped with at least part of the liquid injection hole 11, so that the problem that the electrolyte cannot be quickly infiltrated into the battery core 30 after the electrolyte is injected into the battery from the liquid injection hole 11 can be avoided, and the infiltration efficiency of the electrolyte is improved.

In an embodiment, the orthographic projection of the blocking piece 40 towards the plane where the liquid injection hole 11 is located is not overlapped with the liquid injection hole 11, so that the electrolyte injected from the liquid injection hole 11 is not blocked by the blocking piece 40, and therefore the electrolyte can be quickly infiltrated into the battery core 30, the injection efficiency of the electrolyte is improved, and the manufacturing efficiency of the battery is further improved.

In one embodiment, the distance between the orthographic projection of the shielding element 40 towards the plane of the liquid injection hole 11 and the liquid injection hole 11 is 15mm-50mm, so that the shielding element 40 and the liquid injection hole 11 can be staggered, the infiltration rate of the electrolyte cannot be influenced by the fact that the shielding element 40 is close to the liquid injection hole 11, the shielding element 40 and the liquid injection hole 11 cannot be far away, the gap between the positive pole piece and the negative pole piece of the battery core which is not restrained by the shielding element 40 is large, and the problem that the safety risk inside the battery is caused by the fact that the pole pieces fall due to the fact that the positive pole piece and the negative pole piece are washed by the electrolyte exists.

The distance between the orthographic projection of the shielding element 40 towards the pouring hole 11 and the pouring hole 11 can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 25mm, 28mm, 30mm, 35mm, 38mm, 40mm, 45mm, 46mm, 48mm, 49mm or 50mm, etc.

In one embodiment, a tab portion is led out from at least one end of the battery cell 30, and the shielding member 40 is disposed at least one end of the tab portion led out from the battery cell 30, so that the shielding member 40 can effectively restrain one end of the tab portion led out from the battery cell 30, and the risk of insulation failure caused by reverse insertion of the tab portion is avoided.

The one end that electric core 30 draws out to have utmost point ear can be regarded as the one end that positive pole piece or negative pole piece extend, further can regard as positive pole piece and negative pole piece to form gapped one end, and shielding piece 40 sets up in the one end that electric core 30 draws out to have utmost point ear to can realize the shrink in space between positive pole piece and the negative pole piece, avoid utmost point ear to insert.

The end of the battery cell 30 from which the tab portion is led out can be considered as a third surface 35.

In one embodiment, as shown in fig. 3 to 5, the tab portions include a first tab portion 33 and a second tab portion 34 with opposite polarities, and the first tab portion 33 and the second tab portion 34 are led out from the same end of the battery cell 30; the shielding member 40 is located between the first pole ear portion 33 and the second pole ear portion 34, so that the battery cell 30 can be reliably restrained by the shielding member 40, the problem that the first pole ear portion 33 and the second pole ear portion 34 are inserted into the battery cell 30 is avoided, and the safety performance of the battery cell 30 is improved.

It should be noted that, in some embodiments, it is not excluded that the first pole ear portion 33 and the second pole ear portion 34 may extend from two opposite ends of the battery cell 30.

In one embodiment, the battery cells 30 are one, that is, one battery may include only one battery cell, and the shielding member 40 is used to fasten one battery cell 30, thereby improving the safety performance of the battery cell 30.

The battery cell 30 may include a first surface 31 and a second surface 32 opposite to each other, and a third surface 35 may be located between the first surface 31 and the second surface 32, in which case, the shielding member 40 is connected to the first surface 31 and the second surface 32, so as to tighten the third surface 35, thereby avoiding the problem that external components protrude into the third surface 35.

In one embodiment, the battery may include only one cell 30, i.e., the cell 30 does not include a plurality of sub-cells, as shown in fig. 3.

In one embodiment, the battery cell 30 includes a plurality of sub-battery cells, and at least one shielding member 40 is connected to each of the plurality of sub-battery cells, that is, each of the sub-battery cells may be connected to the shielding member 40, so that the shielding member 40 tightens each of the sub-battery cells, and the safety performance of the battery cell 30 is improved.

As shown in fig. 4, for example, the battery cell 30 includes two sub-battery cells, and a shielding member 40 is connected to each of the two sub-battery cells.

In one embodiment, the battery cell 30 includes a plurality of sub-battery cells, and one shielding member 40 is connected to the plurality of sub-battery cells at the same time, that is, the outermost side of the plurality of sub-battery cells may be formed with the first surface 31 and the second surface 32, and the shielding member 40 may shield the end surfaces of the plurality of sub-battery cells at the same time, that is, the end surfaces of the plurality of battery cell leading-out electrode lug portions may be fastened at the same time by the shielding member 40.

As shown in fig. 5, for example, the battery cell 30 includes two sub-battery cells, and two surfaces of the two sub-battery cells facing away from each other are connected by a shielding member 40, so that one shielding member 40 is simultaneously connected to end surfaces of the two sub-battery cells.

In one embodiment, the air storage space 12 is formed on the inner side of the battery case 10, and the air storage space 12 is disposed opposite to the explosion-proof valve 20, so that an air storage body can be stored in the air storage space 12, and the explosion of the explosion-proof valve 20 is ensured, thereby improving the safety performance of the battery.

The opening of the gas storage space 12 is opposite to the shielding member 40, and the orthographic projection of the shielding member 40 facing the plane of the opening of the gas storage space 12 coincides with a part of the opening of the gas storage space 12, so that the problem that the gas is concentrated to the middle position of the explosion-proof valve 20 through the gas storage space 12, and the explosion-proof valve 20 is opened by mistake is avoided.

In one embodiment, the battery case 10 is formed with the air storage space 12, so that the use function of the battery case 10 can be expanded.

In one embodiment, the explosion-proof valve 20 is formed with the air storage space 12, that is, the explosion-proof valve 20 can be formed with the air storage space 12 on the basis of realizing explosion prevention, thereby improving the explosion-proof performance of the explosion-proof valve 20.

In one embodiment, as shown in fig. 2, the battery further includes an insulating structure 50, the insulating structure 50 is disposed between the battery core 30 and the battery case 10, and the insulating structure 50 forms the air storage space 12, so that the insulating structure 50 not only realizes insulation protection between the battery core 30 and the battery case 10, but also enables the insulating structure 50 to form the air storage space 12, thereby improving the safety performance of the battery.

Referring to fig. 2, the insulating structure 50 forms an air storage space 12, the air storage space 12 is opposite to the explosion-proof valve 20, and a through hole may be formed in the air storage space 12, so that the air flow inside the battery enters the air storage space 12.

Note that the battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack portion including a positive electrode sheet, a separator, and a negative electrode sheet. When the positive pole piece is a positive pole piece, the negative pole piece is a negative pole piece. The polarity of the positive pole piece and the polarity of the negative pole piece can be interchanged. The positive pole piece and the negative pole piece are coated with active substances.

In one embodiment, the battery may be a prismatic battery, that is, the battery may be a prismatic battery, which mainly refers to a straight line whose shape is a prism, but does not strictly limit whether each edge of the prism is strictly defined, and the corner between the edges is not necessarily a right angle, and may be an arc transition.

The battery can be the lamination formula battery, and it is convenient not only to make up, and can process and obtain the longer battery of length. Specifically, the battery cell is a laminated battery cell, and the battery cell has mutually-laminated positive pole pieces, negative pole pieces opposite to the positive pole pieces in electrical property and diaphragm sheets arranged between the positive pole pieces and the negative pole pieces, so that a plurality of pairs of positive pole pieces and negative pole pieces are stacked to form the laminated battery cell.

Or, the battery may be a wound battery, that is, a positive electrode plate, a negative electrode plate having an opposite electrical property to the positive electrode plate, and a diaphragm disposed between the positive electrode plate and the negative electrode plate are wound to obtain a wound electrical core.

In one embodiment, the battery may be a cylindrical battery. The battery may be a wound battery, that is, a positive electrode plate, a negative electrode plate having an opposite electrical property to the positive electrode plate, and a diaphragm disposed between the positive electrode plate and the negative electrode plate are wound to obtain a wound battery cell.

In one embodiment, as shown, the battery may further include a pole assembly 60, and the battery cell 30 is electrically connected to the pole assembly 60. The pole post assemblies 60 may be two, and the two pole post assemblies 60 are electrically connected to the first pole ear portion 33 and the second pole ear portion 34 of the battery cell 30, respectively.

The battery case 10 may include a first case member and a second case member, which are connected. The first housing member may be a cover plate, the second housing member is formed with a receiving cavity, the pole assembly 60 may be disposed on the cover plate, and the explosion-proof valve 20 may be disposed on the cover plate.

It should be noted that the first housing member and the second housing member may be provided independently. In some embodiments, it is not excluded that the first and second housing parts may be of one integral structure, the space for accommodating the electrical core being formed by stamping and subsequently being closed by welding.

An embodiment of the utility model also provides a battery pack, including foretell battery.

The utility model discloses a battery pack of embodiment includes the battery, the battery includes battery housing 10, explosion-proof valve 20, electric core 30 and shielding piece 40, explosion-proof valve 20 sets up on battery housing 10, electric core 30 sets up in battery housing 10, through connecting shielding piece 40 on electric core 30, thereby can two surfaces that fixed connection electric core 30 is relative, tighten electric core 30 with this, can reduce the inside possibility of exterior structure inserting electric core 30, thereby the safety performance of battery has been improved, and explosion-proof valve 20 sets up with shielding piece 40 relatively, and shielding piece 40 coincides with a part of explosion-proof valve 20 towards the planar orthographic projection of explosion-proof valve 20 place, on the basis that does not influence explosion-proof valve 20 and normally opens, also can avoid explosion-proof valve 20 to explode in advance, and consider that there is certain gaseous space of storage in the middle part of explosion-proof valve 20, lead to gaseous long-term focusing on the middle part of explosion-proof valve 20, lead to explode in advance, just to the position of explosion-proof valve 20, can make explosion-proof gas disperse, and shielding piece 40 is in the plane the space of explosion-proof valve 20 and shielding piece 20, thereby can not lead to further to the emergence of explosion-proof valve 20, the inside the size of explosion-proof valve 20 can avoid the emergence to further to exist to dash the risk of the coincidence, thereby it is difficult to further to improve the explosion-proof valve 20.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixing a plurality of batteries. The battery can be a cylindrical battery, and the battery module can further comprise a bracket, and the battery can be fixed on the bracket.

The battery pack includes a plurality of batteries and a case for fixing the plurality of batteries.

It should be noted that the battery pack includes a plurality of batteries, and the plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module. Or, a plurality of batteries can directly set up in the box, need not to carry out the group to a plurality of batteries promptly, utilizes the box to fix a plurality of batteries.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims (13)

1. A battery, comprising:

a battery case (10);

an explosion-proof valve (20), the explosion-proof valve (20) being disposed on the battery case (10);

a battery cell (30), the battery cell (30) disposed within the battery housing (10);

the shielding piece (40) is connected to the battery core (30) so as to fixedly connect two opposite surfaces of the battery core (30);

the explosion-proof valve (20) is arranged opposite to the shielding piece (40), and the orthographic projection of the shielding piece (40) towards the plane where the explosion-proof valve (20) is located is overlapped with a part of the explosion-proof valve (20).

2. The battery according to claim 1, wherein the cell (30) comprises first and second opposing surfaces (31, 32), the shield (40) fixedly connecting the first and second surfaces (31, 32);

wherein the ratio of the width of the explosion-proof valve (20) to the width of the shutter (40) in a direction parallel to the first and second surfaces (31, 32) is 0.2-0.6.

3. The battery according to claim 2, characterized in that the first surface (31) and the second surface (32) are large surfaces of the battery cell (30).

4. The battery according to claim 3, characterized in that the electric core (30) further comprises a third surface (35), the third surface (35) being located between the first surface (31) and the second surface (32), the third surface (35) being arranged opposite the explosion-proof valve (20), the shutter (40) being further connected to the third surface (35).

5. The battery according to claim 1, characterized in that the screen (40) is bonded to the cell (30).

6. The battery according to any one of claims 1 to 5, wherein the shield (40) is an insulating film.

7. The battery according to any one of claims 1 to 5, characterized in that a liquid injection hole (11) is provided in the battery case (10), and the shutter (40) is provided opposite to a surface of the battery case (10) in which the liquid injection hole (11) is provided;

wherein, the orthographic projection of the shielding piece (40) towards the plane of the liquid injection hole (11) is not overlapped with at least part of the liquid injection hole (11).

8. The battery according to claim 7, characterized in that the distance between the orthographic projection of the shutter (40) towards the plane of the pouring hole (11) and the pouring hole (11) is 15-50 mm.

9. The battery according to any one of claims 1 to 5, characterized in that an ear portion leads out from at least one end of the battery core (30), and the shield (40) is provided to at least one end of the battery core (30) from which the ear portion leads out.

10. The battery according to claim 9, characterized in that the pole ear portions comprise a first pole ear portion (33) and a second pole ear portion (34) of opposite polarity, the first pole ear portion (33) and the second pole ear portion (34) being led out from the same end of the cell (30);

wherein the shield (40) is located between the first pole ear (33) and the second pole ear (34).

11. The battery according to any of claims 1 to 5, characterized in that the cell (30) comprises a plurality of sub-cells, to each of which at least one shield (40) is connected, or in that one shield (40) is connected to a plurality of sub-cells simultaneously.

12. The battery according to any one of claims 1 to 5, wherein an air storage space (12) is formed inside the battery case (10), the air storage space (12) is disposed opposite to the explosion-proof valve (20), an opening of the air storage space (12) is disposed opposite to the shield (40), and a orthographic projection of the shield (40) on a plane where the opening of the air storage space (12) is located coincides with a portion of the opening of the air storage space (12).

13. The battery according to any one of claims 1 to 5, wherein the battery is a quadrangular-prism-type battery.

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