CN218632327U - Battery with a battery cell - Google Patents

Abstract

The utility model provides a battery. The battery comprises a shell, a battery cell and a protection board, wherein the battery cell comprises a first battery cell and a second battery cell which are stacked, and the first battery cell and the second battery cell are both positioned in the shell; the inner bottom wall of the shell is provided with a first supporting part and a second supporting part, one end of the first supporting part is connected with one end of the second supporting part, the first battery cell is abutted to the first supporting part, part of the second battery cell is abutted to the second supporting part, a space is reserved between the first supporting part and the second supporting part, a concave part is formed outside the shell, and the protection plate is located in the concave part. The utility model provides a battery, battery occupation space is little, is favorable to realizing terminal equipment's frivolousization.

Description

Battery with a battery cell

Technical Field

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

Background

Terminal devices such as mobile phones and tablet computers have become essential scientific and technological products in the life, study and entertainment processes of people. With the development of terminal equipment and the upgrading of consumer experience, the terminal equipment develops towards long endurance, light weight and thinness.

In the related art, a battery includes a casing, a battery cell and a protection board, the battery cell is located inside the casing, the protection board is located outside the casing, and the protection board and the casing are stacked.

However, the above battery occupies a large space.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery, battery occupation space is little, is favorable to realizing terminal equipment's frivolousization.

The utility model provides a battery, which comprises a shell, a battery core and a protective plate,

the battery cell comprises a first battery cell and a second battery cell, the first battery cell and the second battery cell are arranged in a stacked mode, and the first battery cell and the second battery cell are both located inside the shell;

the inner bottom wall of the shell is provided with a first supporting part and a second supporting part, one end of the first supporting part is connected with one end of the second supporting part, the first battery cell is abutted to the first supporting part, part of the second battery cell is abutted to the second supporting part, a space is reserved between the first supporting part and the second supporting part, a concave part is formed outside the shell, and the protection plate is located in the concave part.

In a possible implementation manner, the first battery cell of the battery provided by the present invention includes a first single-sided pole piece, a plurality of first pole pieces, a plurality of second pole pieces, and a plurality of diaphragms, wherein the plurality of first pole pieces and the plurality of second pole pieces are stacked alternately to form a first stacked structure, and the diaphragms are disposed between the adjacent first pole pieces and second pole pieces;

first single face pole piece is located one side that first stacked structure deviates from the second electricity core, and is provided with the diaphragm between first single face pole piece and the first stacked structure, first single face pole piece and first supporting part butt.

In a possible implementation manner, the utility model provides a battery, first single face pole piece include first mass flow body and first coating, and the first coating setting deviates from one side of first supporting part at first mass flow body.

In a possible implementation manner, in the battery provided by the present invention, the second electrical core includes a second single-sided pole piece, a plurality of first pole pieces, a plurality of second pole pieces, and a plurality of diaphragms, the plurality of first pole pieces and the plurality of second pole pieces are stacked alternately to form a second stacked structure, and the diaphragms are disposed between the adjacent first pole pieces and second pole pieces;

a second single-sided pole piece is arranged on one side of the second stacking structure, which is far away from the first battery cell, and a diaphragm is arranged between the second single-sided pole piece and the second stacking structure;

the polarity of the second single-sided pole piece is the same as that of the first single-sided pole piece.

In a possible implementation manner, the utility model provides a battery, second single face pole piece include the second mass flow body and second coating, and the second coating sets up the one side of the first electric core of second mass flow body orientation.

In a possible implementation manner, in the battery provided by the present invention, a diaphragm is disposed on one side of the second stacking structure facing the first electrical core, and the diaphragm of the second stacking structure facing one side of the first electrical core abuts against the second supporting portion;

or a third single-sided pole piece is arranged on one side, facing the first battery cell, of the second stacking structure, a diaphragm is arranged between the third single-sided pole piece and the second stacking structure, and the third single-sided pole piece is abutted to the second supporting portion.

In a possible implementation manner, the utility model provides a battery, third single face pole piece include the third mass flow body and third coating, and the relative both sides of the third mass flow body all are provided with the third coating, and the third mass flow body is located the outside of second supporting part towards the orthographic projection of the third coating on second supporting part place plane of second supporting part one side.

In a possible implementation manner, the utility model provides a battery, the casing includes a bottom plate and a side plate surrounding the bottom plate, one side of the side plate departing from the bottom plate is a plane, the bottom plate includes a first supporting part and a second supporting part, the distance from the second supporting part to the side of the side plate departing from the bottom plate is less than the distance from the first supporting part to the side of the side plate departing from the bottom plate;

the concave part is positioned on one side of the second supporting part, which is far away from the side plate.

In a possible implementation manner, in the battery provided by the utility model, the distance from the second supporting part to the side of the side plate deviating from the bottom plate is less than the distance from the first supporting part to the side of the side plate deviating from the bottom plate, and the value of the distance from the second supporting part to the side of the side plate is 1.5mm-4.0mm;

and/or the distance from one surface of the first supporting part departing from the side plate to one surface of the side plate departing from the bottom plate is 4.0-8.0 mm.

In a possible implementation manner, the battery provided by the utility model further comprises a negative electrode leading-out structure, wherein the negative electrode leading-out structure is arranged on one side of the side plate close to the first supporting part;

the negative electrode lug of the battery cell is electrically connected with the negative electrode lead-out structure;

and/or the battery also comprises a positive electrode leading-out structure, the positive electrode leading-out structure is arranged on one side of the side plate close to the first supporting part, and a positive electrode lug of the battery cell is electrically connected with the positive electrode leading-out structure.

The utility model provides a battery, through setting up the casing, electric core and protection shield, electric core includes first electric core and second electric core, first electric core and the range upon range of setting of second electric core, first electric core and second electric core all are located the inside of casing, the interior diapire of casing has first supporting part and second supporting part, the one end of first supporting part is connected with the one end of second supporting part, first electric core and first supporting part butt, partial second electric core and second supporting part butt, the interval has between first supporting part and the second supporting part, with the outside at the casing forms the depressed part, the protection shield is located the depressed part. Like this, can reduce the whole thickness of battery, moreover, the protruding structure in the end equipment can be held to the depressed part to space in the make full use of terminal equipment is favorable to terminal equipment's frivolousization.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

fig. 2 is a schematic view of an internal structure of a battery according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a bottom plate and a side plate in a battery according to an embodiment of the present invention;

fig. 4 is a front view of a bottom plate and a side plate in a battery provided by an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a casing and a battery cell in a battery provided by an embodiment of the present invention;

fig. 6 is another schematic structural diagram of a housing and a battery cell in a battery provided in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first single-sided pole piece in a battery provided in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second single-sided pole piece in a battery provided in an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a third single-sided pole piece in a battery provided in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a bottom plate and a negative electrode lead-out structure in a battery provided in an embodiment of the present invention;

fig. 11 is a schematic structural view of a negative electrode conductive member in a battery according to an embodiment of the present invention;

fig. 12 is a schematic diagram of positions of a bottom plate and a battery cell in a battery provided in an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a middle bottom plate and a positive electrode lead-out structure of a battery according to an embodiment of the present invention;

fig. 14 is a schematic position diagram of a middle bottom plate, a battery cell, and a positive electrode lead-out structure of a battery provided in an embodiment of the present invention;

fig. 15 is a schematic structural view of a positive electrode junction block and a positive electrode conductive member in a battery according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of a positive electrode conductive member in a battery according to an embodiment of the present invention.

Description of reference numerals:

100-a housing;

110-a recess; 120-a backplane; 121-a second support; 122-a first support; 130-side plate; 131-mounting holes; 132-liquid injection hole; 140-a top cover;

200-electric core;

210-a first cell; 211-a first single-sided pole piece; 2111-a first current collector; 2112-first coating; 212-a first pole piece; 213-a second pole piece; 214-a diaphragm; 215-a first stacked structure; 220-a second cell; 221-a second single-sided pole piece; 2211-a second current collector; 2212-second coating layer; 222 a first stacked structure; 223-a third single-sided pole piece; 2231-a third current collector; 2232-a third coating;

300-a protective plate;

400-a negative lead-out structure;

410-a negative pole adapter plate; 420-negative pole changes the piecing block; 430-negative electrode conductive member; 431-a negative conductive part; 432-a negative extension;

500-positive pole leading-out structure;

510-a positive pole patch; 520-positive pole transfer block; 530-a first insulator; 540-a second insulator; 550-a positive electrode conductive member; 551-positive conductive part; 552-positive extension.

Detailed Description

In the description of the present invention, it is to be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The terms "first," "second," and "third" (if any) in the description and claims of the present invention and in the above-described drawings 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 is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Moreover, 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 maintenance tool that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or maintenance tool.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the related art, a battery includes a casing, a battery cell and a protection board, the battery cell is located inside the casing, the protection board is located outside the casing, and the protection board and the casing are stacked. Thus, the overall thickness of the battery is large. Terminal equipment needs to set up great mounting groove and is used for installing the battery, and unable make full use of terminal equipment interior space is unfavorable for terminal equipment's frivolousness.

In order to solve the technical problem, the utility model provides a battery, through setting up casing, electric core and protection shield, electric core is located the inside of casing, and the protection shield is located the outside of casing. One end of the shell is provided with a sunken part, the protection plate is positioned in the sunken part, and the protection plate is abutted against the outer wall of the shell. Like this, can reduce the whole thickness of battery, moreover, the protruding structure in the end equipment can be held to the depressed part to make full use of space in the terminal equipment is favorable to terminal equipment's frivolousization.

Fig. 1 is a schematic structural diagram of a battery provided by an embodiment of the present invention, and fig. 2 is a schematic internal structural diagram of a battery provided by an embodiment of the present invention.

Referring to fig. 1 and 2, the present invention provides a battery, which includes a casing 100, a battery core 200, and a protection plate 300.

The battery cell 200 includes a first battery cell 210 and a second battery cell 220, the first battery cell 210 and the second battery cell 220 are stacked, and both the first battery cell 210 and the second battery cell 220 are located inside the casing 100;

the inner bottom wall of the casing 100 has a first supporting portion 122 and a second supporting portion 121, one end of the first supporting portion 122 is connected to one end of the second supporting portion 121, the first battery cell 210 abuts against the first supporting portion 122, a part of the second battery cell 220 abuts against the second supporting portion 121, a gap is formed between the first supporting portion 122 and the second supporting portion 121, so as to form a recess 110 outside the casing 100, and the protection plate 300 is located in the recess 110.

The thickness direction of the battery is the direction indicated by the straight arrow in fig. 2.

In the battery provided by the embodiment, by providing the casing 100, the battery cell 200 and the protective plate 300, the battery cell 200 includes a first battery cell 210 and a second battery cell 220, the first battery cell 210 and the second battery cell 220 are stacked, and both the first battery cell 210 and the second battery cell 220 are located inside the casing 100;

the inner bottom wall of the casing 100 has a first supporting portion 122 and a second supporting portion 121, one end of the first supporting portion 122 is connected to one end of the second supporting portion 121, the first battery cell 210 abuts against the first supporting portion 122, a part of the second battery cell 220 abuts against the second supporting portion 121, a gap is formed between the first supporting portion 122 and the second supporting portion 121, so as to form a recess 110 outside the casing 100, and the protection plate 300 is located in the recess 110. Therefore, the overall thickness of the battery can be reduced, and the concave part 110 can accommodate a convex structure in the terminal equipment, so that the space in the terminal equipment is fully utilized, and the terminal equipment is light and thin.

Fig. 3 is a schematic structural view of a bottom plate and a side plate in a battery according to an embodiment of the present invention.

Referring to fig. 3, in a possible implementation manner, the casing 100 includes a bottom plate 120 and a side plate 130 surrounding the bottom plate 120, a surface of the side plate 130 facing away from the bottom plate 120 is a plane, the bottom plate 120 includes a second supporting portion 121 and a second supporting portion 121, one end of the second supporting portion 121 is connected to one end of the second supporting portion 121, and a distance from the second supporting portion 121 to a surface of the side plate 130 facing away from the bottom plate 120 is smaller than a distance from the second supporting portion 121 to a surface of the side plate 130 facing away from the bottom plate 120. The recess 110 is located on a side of the second supporting portion 121 facing away from the side plate 130. Thus, the housing 100 has a simple structure and is easy to process.

Specifically, the housing 100 further includes a top cover 140, and the top cover 140 covers a surface of the side plate 130 facing away from the bottom plate 120. Illustratively, the top cover 140 and the side plate 130 may be connected by welding or bonding.

The bottom plate 120 and the side plate 130 are integrally formed by pressing, and the bottom plate 120 and the side plate 130 may be made of steel. Compared with the case made of an aluminum-plastic film in the related art, the case made of steel 100 is convenient for processing the recess 110, the strength of the case 100 is high, and the wall thickness of the case 100 can be reduced, so that the internal space and the energy density of the battery are not easily lost.

Fig. 4 is a front view of a bottom plate and a side plate in a battery according to an embodiment of the present invention.

Referring to fig. 4, a value a that the distance from the second supporting portion 121 to the side of the side plate 130 facing away from the bottom plate 120 is smaller than the distance from the second supporting portion 121 to the side of the side plate 130 facing away from the bottom plate 120 is 1.5mm to 4.0mm.

For example, the value a that the distance from the second supporting portion 121 to the side of the side plate 130 facing away from the bottom plate 120 is smaller than the distance from the second supporting portion 121 to the side of the side plate 130 facing away from the bottom plate 120 is 2mm or 3mm.

When the value a that the distance from the second supporting portion 121 to the side surface of the side plate 130 facing away from the bottom plate 120 is smaller than 1.5mm, the size of the recess 110 in the battery thickness direction is small, and the mounting space of the protection plate 300 is small.

When the value a that the distance from the second support part 121 to the side plate 130 facing away from the bottom plate 120 is smaller than the distance from the second support part 121 to the side plate 130 facing away from the bottom plate 120 is greater than 4mm, the overall thickness of the battery case 100 is large.

And/or the distance b from one surface of the second supporting part 121 departing from the side plate 130 to one surface of the side plate 130 departing from the bottom plate 120 is 4.0mm-8.0mm.

Illustratively, the distance b from the side of the second supporting part 121 facing away from the side plate 130 to the side of the side plate 130 facing away from the bottom plate 120 is 5mm or 7mm.

When the distance b from the surface of the second support part 121 facing away from the side plate 130 to the surface of the side plate 130 facing away from the bottom plate 120 is less than 4.0mm, the size of the recess 110 in the thickness direction of the battery is small, and the installation space of the protection plate 300 is small.

When the distance b from the side of the second supporting portion 121 facing away from the side plate 130 to the side of the side plate 130 facing away from the bottom plate 120 is greater than 8.0mm, the overall thickness of the battery case 100 is large.

Fig. 5 is a schematic structural diagram of a casing and an electric core in the battery provided by the embodiment of the present invention, and fig. 6 is another schematic structural diagram of a casing and an electric core in the battery provided by the embodiment of the present invention.

Referring to fig. 5 and 6, the shape of the battery cell 200 matches the shape of the casing 100. Thus, the space in the case 100 can be fully utilized to improve the energy density of the battery.

In a possible implementation manner, the first battery cell 210 includes a first single-sided pole piece 211, a plurality of first pole pieces 212, a plurality of second pole pieces 213, and a plurality of diaphragms 214, the plurality of first pole pieces 212 and the plurality of second pole pieces 213 are alternately stacked to form a first stacked structure 215, and the diaphragms 214 are disposed between the adjacent first pole pieces 212 and the adjacent second pole pieces 213.

The first single-sided pole piece 211 is located on a side of the first stacked structure 215 away from the second battery cell 220, a diaphragm 214 is disposed between the first single-sided pole piece 211 and the first stacked structure 215, and the first single-sided pole piece 211 abuts against the first supporting portion 122.

One of the first pole piece 212 and the second pole piece 213 is a positive pole piece, the other is a negative pole piece, and both the first pole piece 212 and the second pole piece 213 are double-sided pole pieces, that is, both opposite sides of the first pole piece 212 and both opposite sides of the second pole piece 213 have coatings.

When the first single-sided electrode 211 is a positive electrode, the case 100 can be a positive electrode of the battery, and when the first single-sided electrode 211 is a negative electrode, the case 100 can be a negative electrode of the battery. Thus, compared with the related art, the rivet column is electrically connected to the positive tab of the battery cell 200 and located outside the casing 100 to serve as the positive electrode of the battery, or the rivet column is electrically connected to the negative tab of the battery cell 200 and located outside the casing 100 to serve as the negative electrode of the battery, so that the overall thickness of the battery is small.

Fig. 7 is a schematic structural diagram of a first single-sided pole piece in a battery according to an embodiment of the present invention.

Referring to fig. 7, the first single-sided pole piece 211 includes a first current collector 2111 and a first coating 2112, and the first coating 2112 is disposed on a side of the first current collector 2111 away from the first support portion 122.

When the first single-sided pole piece 211 is a positive pole piece, the first current collector 2111 may be made of aluminum or aluminum alloy, the first coating 2112 is a positive active material layer, and when the first single-sided pole piece 211 is a negative pole piece, the first current collector 2111 may be made of copper, nickel, stainless steel nickel or copper nickel, and the first coating 2112 is a negative active material layer. Thus, lithium deposition can be prevented.

In this embodiment, the second battery cell 220 includes a second single-sided pole piece 221, a plurality of first pole pieces 212, a plurality of second pole pieces 213, and a plurality of diaphragms 214, the plurality of first pole pieces 212 and the plurality of second pole pieces 213 are alternately stacked to form a second stacked structure 222, and the diaphragms 214 are disposed between the adjacent first pole pieces 212 and the second pole pieces 213.

A second single-sided pole piece 221 is disposed on a side of the second stack structure 222 away from the first cell 210, and a diaphragm 214 is disposed between the second single-sided pole piece 221 and the second stack structure 222.

The second single-sided sheet 221 has the same polarity as the first single-sided sheet 211.

Fig. 8 is a schematic structural diagram of a second single-sided pole piece in a battery provided by an embodiment of the present invention.

Referring to fig. 8, the second single-sided pole piece 221 includes a second current collector 2211 and a second coating 2212, and the second coating 2212 is disposed on a side of the second current collector 2211 facing the first cell 210.

The second single-sided plate 221 has a similar structure to the first single-sided plate 211, which is not described herein again in this embodiment.

In one possible implementation, the diaphragm 214 is disposed on a side of the second stack structure 222 facing the first cell 210, and the diaphragm 214 of the second stack structure 222 facing the first cell 210 abuts against the second support portion 121. In this way, short circuits can be avoided.

In another possible structure, a third single-sided pole piece 223 is disposed on a side of the second stacked structure 222 facing the first cell 210, a diaphragm 214 is disposed between the third single-sided pole piece 223 and the second stacked structure 222, and the third single-sided pole piece 223 abuts against the second support portion 121.

Fig. 9 is a schematic structural diagram of a third single-sided pole piece in a battery according to an embodiment of the present invention.

Referring to fig. 9, in the present embodiment, the third single-sided sheet 223 includes a third current collector 2231 and a third coating 2232, the third coating 2232 is disposed on two opposite sides of the third current collector 2231, and an orthogonal projection of the third coating 2232 on a side of the third current collector 2231 facing the second support 121 on a plane where the second support 121 is located outside the second support 121. In this way, short circuits can be avoided.

Fig. 10 is a schematic structural diagram of a bottom plate and a negative electrode lead-out structure in a battery provided by an embodiment of the present invention. Fig. 11 is a schematic structural diagram of a negative electrode conductive member in a battery according to an embodiment of the present invention.

Referring to fig. 10 and 11, in a possible implementation manner, the battery further includes a negative electrode lead-out structure 400, the negative electrode lead-out structure 400 is disposed on a side of the side plate 130 close to the second support portion 121, and the negative electrode tab of the battery cell 200 is electrically connected to the negative electrode lead-out structure 400.

It should be noted that the casing 100 serves as a negative electrode of the battery, and the negative electrode tab of the battery cell 200 is electrically connected to the negative electrode lead-out structure 400, so that the negative electrode lead-out structure 400 can be used for electrically connecting to other structures in the terminal device, and the installation convenience of the terminal device is improved.

Specifically, the negative electrode lead-out structure 400 includes a negative electrode adapter 410, a negative electrode adapter block 420, and a negative electrode conductive member 430, the negative electrode adapter 410 and the negative electrode adapter block 420 are located inside the casing 100, the negative electrode adapter 410 is electrically connected to the negative electrode tab of the battery cell 200, and the negative electrode adapter block 420 is electrically connected to the negative electrode adapter 410.

The negative electrode conductive member 430 is sequentially inserted on the case 100 and the negative electrode junction block 420 to connect the case 100 and the negative electrode junction block 420, and the negative electrode conductive member 430 is partially positioned outside the case 100.

Referring to fig. 11, the negative conductive member 430 includes a negative conductive portion 431 and a negative extension portion 432, and one end of the negative extension portion 432 is connected to an end surface of the negative conductive portion 431. The diameter of the negative conductive part 431 is larger than that of the negative extension part 432. The negative electrode conductive part 431 is located outside the casing 100, one end of the negative electrode extension part 432, which is far away from the negative electrode conductive part 431, sequentially penetrates through the casing 100 and the negative electrode transfer block 420, and one end of the negative electrode extension part 432, which is far away from the negative electrode conductive part 431, is knocked, so that the diameter of one end of the negative electrode extension part 432, which is far away from the negative electrode conductive part 431, is increased, and the casing 100 and the negative electrode transfer block 420 are connected.

Fig. 12 is a schematic diagram of positions of a bottom plate and a battery cell in a battery provided by an embodiment of the present invention.

Referring to fig. 12, in another possible implementation, the negative electrode tab of the battery cell 200 is electrically connected to the casing 100.

Specifically, the negative electrode tab of the battery cell 200 is bent and then connected to the casing 100. Therefore, the whole structure of the battery is simple, the size of the battery is convenient to reduce, and the energy density of the battery is improved.

Fig. 13 is a schematic structural diagram of a middle bottom plate and a positive electrode lead-out structure of a battery according to an embodiment of the present invention. Fig. 14 is a schematic position diagram of a bottom plate, a battery cell, and a positive electrode lead-out structure in a battery provided in an embodiment of the present invention. Fig. 15 is a schematic structural diagram of a positive electrode junction block and a positive electrode conductive member in a battery according to an embodiment of the present invention. Fig. 16 is a schematic structural diagram of a positive conductive member in a battery according to an embodiment of the present invention.

For convenience of description, the second single-sided tab 221 and the first single-sided tab 211 are both negative tabs, and the case 100 is used as a negative electrode.

Referring to fig. 13 to 16, in some embodiments, the battery further includes a positive electrode lead-out structure 500, the positive electrode lead-out structure 500 is disposed on a side of the side plate 130 close to the second support portion 121, and the positive electrode tab of the battery cell 200 is electrically connected to the positive electrode lead-out structure 500.

Referring to fig. 3, the case 100 is provided with a mounting hole 131 for mounting the positive electrode lead-out structure 500. The positive electrode lead-out structure 500 is disposed on the side of the side plate 130 close to the second support part 121, that is, the mounting hole 131 is located on the side of the side plate 130 close to the second support part 121, which has less influence on the strength of the side plate 130.

Specifically, the positive electrode lead-out structure 500 includes a positive electrode adapting piece 510, a positive electrode adapting block 520, a first insulating piece 530, a second insulating piece 540 and a positive electrode conductive piece 550, the positive electrode adapting piece 510, the positive electrode adapting block 520 and the second insulating piece 540 are located inside the casing 100, the positive electrode adapting piece 510 is electrically connected to a positive electrode tab of the battery cell 200, the positive electrode adapting block 520 is electrically connected to the positive electrode adapting piece 510, and the second insulating piece 540 is located between the positive electrode adapting block 520 and the casing 100.

The positive electrode conductive member 550 is sequentially inserted on the first insulating member 530, the case 100, the second insulating member 540, and the positive electrode junction block 520 to connect the first insulating member 530, the case 100, the second insulating member 540, and the positive electrode junction block 520.

The first insulator 530 is located between the positive conductor 550 and the housing 100, with the positive conductor 550 partially located outside the housing 100.

Referring to fig. 16, positive electrode conductive member 550 includes a positive electrode conductive portion 551 and a positive electrode extension portion 552, and one end of positive electrode extension portion 552 is connected to an end surface of positive electrode conductive portion 551. The diameter of the positive conductive portion 551 is larger than that of the positive extension portion 552. The positive electrode conductive part 551 is located outside the casing 100, one end of the positive electrode extension part 552 departing from the positive electrode conductive part 551 sequentially penetrates through the first insulating part 530, the casing 100, the second insulating part 540 and the positive electrode junction block 520, and the diameter of one end of the positive electrode extension part 552 departing from the positive electrode conductive part 551 is increased by knocking one end of the positive electrode extension part 552 departing from the positive electrode conductive part 551, so that the first insulating part 530, the casing 100, the second insulating part 540 and the positive electrode junction block 520 are connected.

Referring to fig. 3, the side plate 130 is provided with a pour hole 132, the pour hole 132 is located on the side of the side plate 130 close to the second support part 121, and the pour hole 132 and the positive electrode lead-out structure 500 are provided on the side plate 130 on the same side of the bottom plate 120.

It will be appreciated that the pour hole 132 is located on the side of the side plate 130 adjacent to the second support portion 121, and thus, has less effect on the strength of the side plate 130. The injection hole 132 and the positive electrode lead-out structure 500 are disposed on the side plate 130 on the same side of the bottom plate 120, that is, the mounting hole 131 and the injection hole 132 are disposed on the side plate 130 on the same side of the bottom plate 120, which facilitates processing and avoids affecting the strength of the side plates 130 on the other sides.

During assembly, electrolyte is injected into the case 100 through the injection hole 132, and the electrolyte remaining on the surface of the injection hole 132 is washed with dry or wet nonwoven fabric or laser. The clamp presses the seal assembly against the pour hole 132 to seal the cell by adhesive bonding. And then carrying out gas tightness detection, wherein the leak rate of the helium detection tightness test is less than 1.0E-6mbar.L/s.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A battery is characterized by comprising a shell, a battery core and a protective plate,

the battery cell comprises a first battery cell and a second battery cell, which are stacked, and both the first battery cell and the second battery cell are located inside the shell;

the inner bottom wall of the shell is provided with a first supporting portion and a second supporting portion, one end of the first supporting portion is connected with one end of the second supporting portion, the first battery cell is abutted to the first supporting portion, part of the second battery cell is abutted to the second supporting portion, a distance is reserved between the first supporting portion and the second supporting portion, a concave portion is formed outside the shell, and the protection plate is located in the concave portion.

2. The battery of claim 1, wherein the first cell comprises a first single-sided pole piece, a plurality of first pole pieces, a plurality of second pole pieces, and a plurality of separators, the plurality of first pole pieces and the plurality of second pole pieces are stacked alternately to form a first stacked structure, and the separator is disposed between the adjacent first pole pieces and the adjacent second pole pieces;

the first single-sided pole piece is located on one side, away from the second battery cell, of the first stacking structure, the diaphragm is arranged between the first single-sided pole piece and the first stacking structure, and the first single-sided pole piece is abutted to the first supporting portion.

3. The battery of claim 2, wherein the first single-sided sheet comprises a first current collector and a first coating disposed on a side of the first current collector facing away from the first support.

4. The battery of claim 2, wherein the second cell comprises a second single-sided pole piece, a plurality of the first pole pieces, a plurality of the second pole pieces, and a plurality of the separators, the plurality of the first pole pieces and the plurality of the second pole pieces are stacked alternately to form a second stacked structure, and the separators are disposed between the adjacent first pole pieces and the adjacent second pole pieces;

the side, away from the first battery cell, of the second stacking structure is provided with the second single-sided pole piece, and the diaphragm is arranged between the second single-sided pole piece and the second stacking structure;

the polarity of the second single-sided pole piece is the same as that of the first single-sided pole piece.

5. The battery of claim 4, wherein the second single-sided pole piece comprises a second current collector and a second coating, and the second coating is disposed on a side of the second current collector facing the first cell.

6. The battery of claim 4, wherein the diaphragm is disposed on a side of the second stack facing the first cell, and the diaphragm on the side of the second stack facing the first cell abuts the second support;

or a third single-sided pole piece is arranged on one side, facing the first battery cell, of the second stacking structure, the diaphragm is arranged between the third single-sided pole piece and the second stacking structure, and the third single-sided pole piece is abutted to the second supporting portion.

7. The battery of claim 6, wherein the third single-sided electrode sheet comprises a third current collector and a third coating, the third coating is disposed on two opposite sides of the third current collector, and an orthogonal projection of the third coating on one side of the third current collector facing the second support portion on a plane where the second support portion is located outside the second support portion.

8. The battery according to any one of claims 1 to 7, wherein the housing comprises a bottom plate and a side plate surrounding the bottom plate, wherein one side of the side plate facing away from the bottom plate is a plane, the bottom plate comprises the first supporting part and the second supporting part, and the distance from the second supporting part to the side of the side plate facing away from the bottom plate is smaller than the distance from the first supporting part to the side of the side plate facing away from the bottom plate;

the concave part is positioned on one side of the second supporting part, which is deviated from the side plate.

9. The battery of claim 8, wherein the distance from the second support portion to the side of the side plate facing away from the bottom plate is less than the distance from the first support portion to the side of the side plate facing away from the bottom plate by a value in a range of 1.5mm to 4.0mm;

and/or the distance from one surface of the first supporting part departing from the side plate to one surface of the side plate departing from the bottom plate is 4.0mm-8.0mm.

10. The battery of claim 8, further comprising a negative lead-out structure disposed on a side of the side plate adjacent to the first support portion;

the negative electrode lug of the battery cell is electrically connected with the negative electrode leading-out structure;

and/or, still include anodal structure of drawing forth, anodal structure of drawing forth sets up the curb plate is close to one side of first supporting part, the anodal ear of electricity core with anodal structure electricity is drawn forth.

Images