CN217214989U

CN217214989U - Battery with a battery cell

Info

Publication number: CN217214989U
Application number: CN202220910775.2U
Authority: CN
Inventors: 卫志达; 王智峰; 彭宁
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-08-16
Anticipated expiration: 2032-04-19

Abstract

The utility model provides a battery. The battery comprises a shell and at least two battery cells positioned in the shell; the shell comprises a partition board, the partition board divides the shell into at least two mutually isolated accommodating cavities, and the at least two accommodating cavities are arranged side by side; each accommodating cavity is provided with at least one battery cell; the partition board is provided with a connecting unit, and two adjacent battery cores are electrically connected through the connecting unit. The utility model provides a battery, the equipment of being convenient for.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery assembly technique especially relates to a battery.

Background

A cell refers to a single electrochemical cell comprising a positive and a negative electrode. The battery cell comprises a positive pole piece, a negative pole piece, electrolyte and an aluminum plastic film.

In order to meet the requirements of voltage values and current values, a plurality of battery cells are generally connected in series or in parallel to form a battery. When concrete application, a plurality of electric cores set up side by side, and the electrode ear of electric core is located the top, and electric core upside and downside are provided with the support of moulding plastics, correspond every recess of inserting the support of moulding plastics with every electric core, fix a plurality of electric cores together through the support of moulding plastics. And the plurality of battery cores are connected in series or in parallel through the bus bar to form the battery.

However, this external connection of the battery cells makes the assembly of the battery difficult.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery, the battery is easily assembled.

The utility model provides a battery, which comprises a shell and at least two battery cells positioned in the shell;

the shell comprises a partition board which divides the shell into at least two mutually isolated accommodating cavities, and the at least two accommodating cavities are arranged side by side;

each accommodating cavity is provided with at least one battery cell;

the partition board is provided with a connecting unit, and two adjacent battery cores are electrically connected through the connecting unit.

In a possible implementation manner, the utility model provides a battery, electric core include electric core body and set up the utmost point ear on electric core body, and the utmost point ear of each electric core is established ties or is parallelly connected through the linkage unit.

In a possible implementation manner, the utility model provides a battery, the tabs include a first tab and a second tab with opposite polarity to the first tab, the first tab of one of the two adjacent battery cells is electrically connected with the second tab of the other battery cell through a connection unit;

or the first tab of one of the two adjacent battery cells is electrically connected with the first tab of the other battery cell through the connecting unit.

In a possible implementation manner, the battery provided by the utility model comprises a shell and an upper cover, wherein the shell comprises a bottom shell body, the bottom shell body is provided with a containing groove, a partition plate is arranged in the containing groove, and the upper cover is covered on the bottom shell to seal each containing cavity;

the connecting unit is inserted on the partition board.

In a possible implementation manner, the connection unit of the battery provided by the present invention includes a first connection assembly, the first connection assembly includes a first connection member and a second connection member, which are oppositely disposed, and the first connection member and the second connection member are respectively located in different accommodation cavities; the partition board is provided with a first mounting hole, and one of the first connecting piece and the second connecting piece is electrically connected with the other one of the first connecting piece and the second connecting piece through the first mounting hole.

In a possible implementation manner, the first connecting member of the battery provided by the present invention includes a first connecting section and a second connecting section, and the first connecting section is connected to the second connecting section;

the second connecting piece is provided with a connecting hole;

the first connecting section is located and holds the intracavity, and the second connecting section is inserted through first mounting hole and is located the connecting hole, and the one end that the second connecting section deviates from first connecting section has the bulge, and the bulge deviates from the one side butt of first connecting section with the second connecting piece.

In one possible implementation, the utility model provides a battery, the area of the cross-section of bulge reduces along the direction of first linkage segment to second linkage segment.

In a possible implementation manner, the utility model provides a battery, the linkage unit still include two at least first switching pieces, and two first switching pieces are located the different intracavity that holds, and first connecting piece is connected through one first switching piece and one in two adjacent electric cores's utmost point ear electricity, and the second connecting piece is connected through another switching piece and another person's utmost point ear electricity.

In a possible implementation manner, the utility model provides a battery, the linkage unit still include two at least first sealed cushions, set up at least one first sealed cushion between first connecting piece and the baffle, set up at least one first sealed cushion between second connecting piece and the baffle.

In a possible implementation, the utility model provides a battery, at least one first sealed cushion includes sealed cushion body and sealed post, sealed post and this body coupling of sealed cushion, are provided with first through-hole on the sealed post, the axis of first through-hole is unanimous with the axis direction of sealed post, is provided with the second through-hole on the sealed cushion body, and first through-hole corresponds the setting with the second through-hole, and sealed post is inserted and is located first mounting hole, and sealed post is located between baffle and the second linkage segment.

In a possible implementation manner, the battery provided by the utility model further comprises at least two leading-out units, wherein each leading-out unit comprises a second adapter sheet and a second connecting assembly;

the second adapter plate is positioned in the accommodating cavity and connected with a lug of the battery cell;

the second connecting assembly is partially positioned outside the bottom shell and is electrically connected with the second adapter sheet.

In a possible implementation manner, the bottom shell body of the battery provided by the utility model comprises a bottom plate and a side plate, wherein the side plate is wound around the bottom plate, the side plate and the bottom plate together form an accommodating groove, and the side plate is provided with a second mounting hole;

the second connecting assembly comprises a third connecting piece and a fourth connecting piece, and one of the third connecting piece and the fourth connecting piece is electrically connected with the second adapter sheet;

the other one of the third connecting piece and the fourth connecting piece is positioned outside the bottom shell and is connected with the one of the third connecting piece and the fourth connecting piece through the second mounting hole.

In a possible implementation manner, the utility model provides a battery, the unit of drawing forth still include two at least second seal cushion, set up at least one second seal cushion between third connecting piece and the curb plate, set up at least one second seal cushion between fourth connecting piece and the curb plate.

In a possible implementation manner, the utility model provides a battery, the thickness less than or equal to 0.3mm of drain pan, the thickness less than or equal to 0.2mm of upper cover.

The utility model provides a battery, through setting up casing and two at least electric cores, the casing includes the baffle, the baffle separates the chamber that holds for two at least mutual isolations in with the casing, two at least hold the chamber and be and set up side by side, each holds the chamber and is provided with at least one electric core respectively, be provided with the linkage unit on the baffle, two adjacent electric cores pass through the linkage unit electricity and connect, like this, realize the internal connection of battery through the linkage unit, need not to set up the support of moulding plastics and carry out external connection to electric core with the busbar, the battery is convenient for assemble.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these 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 front view of a battery according to an embodiment of the present invention;

fig. 3 is an exploded view of a battery according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along section A-A of FIG. 2;

FIG. 5 is a partial enlarged view of the portion B in FIG. 4;

fig. 6 is an exploded view of a connection unit in a battery according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first connecting member in a battery according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a first sealing rubber gasket in a battery according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along section C-C of FIG. 2;

FIG. 10 is an enlarged view of a portion of FIG. 9 at D;

fig. 11 is an exploded view of a lead-out unit in a battery according to an embodiment of the present invention.

Description of reference numerals:

100-a housing;

110-a separator; 120-a containment chamber; 130-a bottom shell; 131-a bottom case body; 1311-a backplane; 1312-side panels; 1313-second mounting holes; 140-upper cover;

200-electric core;

210-a cell body; 220-pole ear; 221-a first tab; 222-a second tab;

300-a connection unit;

310-a first connection assembly; 311-a first connection member; 3111-a first connection segment; 3112-a second connection segment; 3113-a projection; 312 — a second connector; 3121-a connection aperture; 320-a first transfer tab; 330-first sealing rubber gasket; 331-a sealing gasket body; 3311-a second via; 332-a sealed column; 3321-first via;

400-a lead-out unit;

410-a second interposer; 420-a second connection assembly; 421-a third connection; 422-a fourth connection; 430-second sealing rubber gasket.

Detailed Description

In the description of the present invention, it should 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 through 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 this invention and 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 expressly 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.

Among the current battery, a plurality of electric cores set up side by side, and the electrode ear of electric core is located the top, and electric core upside and downside are provided with the support of moulding plastics, correspond every recess of inserting the support of moulding plastics with every electric core, fix a plurality of electric cores together through the support of moulding plastics. And the plurality of battery cells are connected in series or in parallel through the bus bar to form the battery. However, in the structure in which the series-parallel connection of the battery cells is realized externally, the electrolyte needs to be encapsulated by the aluminum-plastic film for a single battery cell, and then the injection-molded bracket and the bus bar are used for connecting a plurality of battery cells, so that the difficulty in assembling the battery is high.

In order to solve the technical problem, the utility model provides a battery realizes the series connection or parallelly connected of two adjacent electric cores through the mode of internal connection, sets up each electric core in the confined space, utilizes linkage unit and draws forth the connection that the unit realized each electric core, need not to set up support and the busbar of moulding plastics, simplifies the equipment step, reduces the equipment degree of difficulty of battery.

The present invention will be described with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a battery provided by an embodiment of the present invention, fig. 2 is a front view of a battery provided by an embodiment of the present invention, and fig. 3 is an exploded view of a battery provided by an embodiment of the present invention. Referring to fig. 1 to 3, the present invention provides a battery, which includes a casing 100 and at least two battery cells 200 located in the casing 100.

The casing 100 includes a partition plate 110, the partition plate 110 divides the interior of the casing 100 into at least two accommodating cavities 120 which are isolated from each other, and the at least two accommodating cavities 120 are arranged side by side. Each receiving chamber 120 is provided with at least one battery cell 200. The separator 110 is provided with a connection unit 300, and two adjacent battery cells 200 are electrically connected through the connection unit 300.

It should be noted that the battery cell 200 may include a positive electrode tab, a negative electrode tab, and an electrolyte, and the battery cell 200 is not provided with an aluminum plastic film, but the electrolyte is sealed in each independent accommodating cavity 120 by the casing 100 and the partition 110. Thus, the processing difficulty of the battery cell 200 can be simplified, and the assembly difficulty of the battery can be reduced. Need not to set up extra support of moulding plastics and support, need not to set up the busbar and carry out electric core 200 and connect to simplify the equipment step, can reduce the equipment degree of difficulty of battery. Also, the energy density of the battery can be improved. Alternatively, the battery cell 200 includes a positive electrode plate, a negative electrode plate, an electrolyte, and an aluminum-plastic film, and the electrolyte is encapsulated by the aluminum-plastic film.

Each accommodating cavity 120 is provided with one battery cell 200 or each accommodating cavity 120 is provided with two battery cells 200 respectively, and the two battery cells 200 in the same accommodating cavity 120 are arranged side by side and connected with each other. Each battery cell 200 is connected to the battery cell 200 in another accommodation chamber 120 by a connection unit 300 provided on the separator 110.

The housing 100 may be a metal part, so that the thickness of the housing 100 may be reduced compared to an injection molded part in the prior art, while providing the same support strength for the battery cell 200, so that the energy density of the battery may be improved.

The battery that this embodiment provided, through setting up casing 100 and two at least electric cores 200, casing 100 includes baffle 110, baffle 110 is divided into two at least mutual isolation's the chamber 120 that holds in casing 100, two at least the chamber 120 that holds are the setting side by side, each holds the chamber 120 and is provided with at least one electric core 200 respectively, be provided with coupling unit 300 on the baffle 110, two adjacent electric cores 200 are connected through coupling unit 300 electricity, thus, realize the internal connection of battery through coupling unit 300, need not to set up the support of moulding plastics and carry out the external connection to electric core 200 with the busbar, the battery is convenient for assemble.

In a specific implementation, referring to fig. 3, the battery cell 200 includes a cell body 210 and tabs 220 disposed on the cell body 210, and the tabs 220 of the battery cells 200 are connected in series or in parallel through a connection unit 300.

It should be noted that two adjacent battery cells 200 may be connected in series or in parallel through the connection unit 300, so as to meet the voltage and current requirements of the battery.

The tab 220 includes a first tab 221 and a second tab 222 having a polarity opposite to that of the first tab 221. For example, the first tab 221 is a positive tab and the second tab 222 is a negative tab. Alternatively, the first tab 221 is a negative tab, and the second tab 222 is a positive tab.

The first tab 221 of one of the two adjacent battery cells 200 is electrically connected to the second tab 222 of the other battery cell by the connection unit 300. In this way, the series connection of two battery cells 200 can be achieved.

Alternatively, the first tab 221 of one of the two adjacent battery cells 200 is electrically connected to the first tab 221 of the other battery cell through the connection unit 300. In this way, parallel connection of two battery cells 200 can be achieved.

Fig. 4 is a sectional view taken along a-a in fig. 2, and fig. 5 is a partial enlarged view taken at B in fig. 4, with continued reference to fig. 3 to 5, the housing 100 includes a bottom case 130 and an upper cover 140.

The bottom housing 130 includes a bottom housing body 131, the bottom housing body 131 has a receiving cavity, the partition 110 is disposed in the receiving cavity, the receiving cavity is divided into a plurality of receiving cavities 120 by the partition 110, and the upper cover 140 covers the bottom housing 130 to enclose the receiving cavities 120.

Specifically, the bottom case 130 and the upper cover 140 are sealed by laser welding.

Wherein the connection unit 300 is inserted on the partition 110.

It will be appreciated that this structure is easy to implement, and the sealing of the receiving chamber 120 is easy to implement by inserting the connection unit 300 on the partition 110.

Fig. 6 is an exploded view of a connection unit in a battery according to an embodiment of the present invention. Referring to fig. 6, in a possible implementation manner, the connection unit 300 includes a first connection assembly 310, the first connection assembly 310 includes a first connection member 311 and a second connection member 312 which are oppositely disposed, and the first connection member 311 and the second connection member 312 are respectively located in different accommodating cavities 120.

The partition 110 has a first mounting hole (not shown), and one of the first connecting member 311 and the second connecting member 312 is electrically connected to the other through the first mounting hole.

Fig. 7 is a schematic structural diagram of a first connecting member in a battery according to an embodiment of the present invention, and referring to fig. 5 to 7, in a specific implementation, the first connecting member 311 includes a first connecting section 3111 and a second connecting section 3112, and the first connecting section 3111 is connected to the second connecting section 3112. The second link 312 has a connecting hole 3121 formed thereon.

First linkage segment 3111 is located and holds the chamber 120, and second linkage segment 3112 is inserted through first mounting hole and is located connecting hole 3121, and the one end that second linkage segment 3112 deviates from first linkage segment 3111 has bulge 3113, and bulge 3113 and second connecting piece 312 deviate from the one side butt of first linkage segment 3111.

It should be noted that, during installation, the first connecting section 3111 is located in the accommodating cavity 120, and the second connecting section 3112 is inserted through the first installation hole, so that the second connecting section 3112 is located in the other accommodating cavity 120, and the second connecting section 3112 is inserted through the connecting hole 3121 of the second connecting member 312. The end of the second connecting section 3112 facing away from the first connecting section 3111 is tapped with a mounting tool, so that a projection 3113 is formed under the tapping action of the mounting tool. The diameter of the end surface of the protrusion 3113 facing the second coupling section 3113 is larger than the diameter of the coupling hole 3121, thereby achieving coupling of the first coupling member 311 with the second coupling member 312.

It can be understood that, the riveting method is adopted to realize the connection between the first connecting piece 311 and the second connecting piece 312, the process difficulty is low, and the installation efficiency can be improved.

In the present embodiment, the area of the cross section of the protrusion 3113 is reduced in the direction from the first connection section 3111 to the second connection section 3112, so that the influence on the connection of the second connection member 312 with the tab 220 can be reduced.

In some embodiments, the connection unit 300 further includes at least two first connection pieces 320, the two first connection pieces 320 are located in different accommodating cavities 120, the first connection piece 311 is electrically connected to the tab 220 of one of the two adjacent battery cells 200 through one first connection piece 320, and the second connection piece 312 is connected to the tab 220 of the other through the other connection piece.

The first tab 320 and the tab 220 are connected by ultrasonic welding. The first rotating tab 320 is connected to the first connecting member 311 by laser welding, and the first rotating tab 320 is connected to the second connecting member 312 by laser welding.

It can be understood that the first rotation tab 320 is provided to connect the tab 220 and the first connection assembly 310 by using the first rotation tab 320, so as to reduce the manufacturing difficulty of the battery and improve the product stability.

In this embodiment, in order to improve the sealing performance of the battery, the connection unit 300 further includes at least two first sealing gaskets 330, at least one first sealing gasket 330 is disposed between the first connection member 311 and the separator 110, and at least one first sealing gasket 330 is disposed between the second connection member 312 and the separator 110.

Specifically, the number of the first sealing rubber pads 330 is two, one first sealing rubber pad 330 is disposed between the first connecting member 311 and the partition plate 110, and one first sealing rubber pad 330 is disposed between the second connecting member 312 and the partition plate 110. The first sealing rubber 330 may prevent the electrolyte from entering into the other receiving chamber 120 through the first mounting hole.

Fig. 8 is a schematic structural diagram of a first sealing rubber pad in a battery provided by an embodiment of the present invention, referring to fig. 8, in some embodiments, at least one first sealing rubber pad 330 includes a sealing rubber pad body 331 and a sealing post 332, the sealing post 332 is connected to the sealing rubber pad body 331, a first through hole 3321 is provided on the sealing post 332, an axis of the first through hole 3321 is consistent with an axis direction of the sealing post 332, a second through hole 3311 is provided on the sealing rubber pad body 331, the first through hole 3321 corresponds to the second through hole 3311, the sealing post 332 is inserted into the first mounting hole, and a second connecting section 3112 is inserted into the first through hole 3321 and the second through hole 3311, so that the sealing post 332 is located between the partition plate 110 and the second connecting section 3112. Thus, the sealability of the battery can be improved while achieving the insulation of the first connection member 311 from the separator 110 and the insulation of the second connection member 312 from the separator 110, thereby improving the safety of the battery.

Specifically, as shown in fig. 5, one of the first sealing gaskets 330 includes a sealing gasket body 331 and a sealing post 332. The other first sealing rubber pad 330 only includes a sealing rubber pad body 331.

Fig. 9 is a sectional view taken along a section C-C in fig. 2, fig. 10 is a partial enlarged view of a portion D in fig. 9, and fig. 11 is an exploded view of a lead-out unit in a battery according to an embodiment of the present invention. Referring to fig. 9 to 11, in a possible implementation, the connector further includes at least two outlet units 400, and the outlet unit 400 includes a second adaptor sheet 410 and a second connecting assembly 420. The second adapter sheet 410 is located in the accommodating cavity 120, and the second adapter sheet 410 is connected to the tab 220 of the battery cell 200. The second connecting assembly 420 is partially located outside the bottom case 130, and the second connecting assembly 420 is electrically connected to the second adaptor 410.

It should be noted that, when the number of the battery cells 200 is two, two battery cells 200 are located in different accommodating cavities 120, and two battery cells 200 need to be connected in series, the number of the leading-out units 400 is two, wherein the second adaptor piece 410 in one of the leading-out units 400 is located in the accommodating cavity 120 corresponding to the first battery cell 200 and connected to the first tab 221 of the first battery cell 200, and the second adaptor piece 410 in the other leading-out unit 400 is located in the accommodating cavity 120 corresponding to the second battery cell 200 and connected to the second tab 222 of the second battery cell 200. The extraction unit 400 is used to form the positive and negative electrodes of the battery as a whole. The second tab 222 of the first battery cell 200 is connected to the first tab 221 of the second battery cell 200 by a connection unit 300.

Or, when the number of the battery cells 200 is two, two battery cells 200 are located in different accommodating cavities 120, and two battery cells 200 need to be connected in parallel, the number of the lead-out units 400 is two, wherein the second adaptor piece 410 in one lead-out unit 400 is located in the accommodating cavity 120 corresponding to the first battery cell 200 and connected to the first tab 221 of the first battery cell 200, and the second adaptor piece 410 in the other lead-out unit 400 is located in the accommodating cavity 120 corresponding to the second battery cell 200 and connected to the first tab 221 of the second battery cell 200. The second tab 222 of the first battery cell 200 and the second tab 222 of the second battery cell 200 are connected by a connection unit 300. It can be understood that the second tabs 222 of the battery cells 200 are close to the separator 110, the second tabs 222 of the two battery cells 200 are connected by the connection unit 300, and the first tabs 221 of the two battery cells 200 are externally connected after being led out by the lead-out unit 400, so that the connection reliability can be improved.

In one possible implementation, referring to fig. 3 and 9, the bottom case body 131 includes a bottom plate 1311 and a side plate 1312, the side plate 1312 is disposed around the bottom plate 1311, the side plate 1312 and the bottom plate 1311 together form a receiving groove, and the side plate 1312 has a second mounting hole 1313.

The second connecting assembly 420 includes a third connecting member 421 and a fourth connecting member 422, and one of the third connecting member 421 and the fourth connecting member 422 is electrically connected to the second interposer 410. The other one of the third and

fourth connectors

421 and 422 is located outside the bottom case 130, and is connected with one of the third and

fourth connectors

421 and 422 through the second mounting hole 1313.

In a specific implementation, the fourth connection member 422 and the second interposer 410 are connected by laser welding. The third connection 421 partially passes through the second mounting hole 1313 and then electrically connects to the fourth connection 422.

It can be understood that this structure is easy to implement and simple to install, and can improve the assembly efficiency of the battery.

It should be noted that, a flange may be disposed on the top surface of the side plate 1312, and the flange is located outside the accommodating cavity 120, so as to facilitate the punch forming of the bottom case body 131 and reduce the difficulty of the battery assembling process.

In this embodiment, the drawing unit 400 further includes at least two second sealing gaskets 430, at least one second sealing gasket 430 is disposed between the third connecting member 421 and the side plate 1312, and at least one second sealing gasket 430 is disposed between the fourth connecting member 422 and the side plate 1312.

Specifically, the number of the second sealing rubber pads 430 is two, one second sealing rubber pad 430 is disposed between the third connecting member 421 and the side plate 1312, and one second sealing rubber pad 430 is disposed between the fourth connecting member 422 and the side plate 1312. The second sealing rubber gasket 430 can improve the sealing performance of the battery, and simultaneously, the third connecting member 421 and the side plate 1312 are insulated, and the fourth connecting member 422 and the side plate 1312 are insulated, so that the safety of the battery is improved.

The first sealing rubber pad 330 and the second sealing rubber pad 430 may be made of polymer materials such as Polypropylene (PP), fluorine glue, or inorganic non-metal insulating materials such as ceramic.

It should be noted that the specific structure of the second sealant pad 430 may be the same as that of the first sealant pad 330, and the detailed description is omitted here.

In one possible implementation, the third connecting member 421 has the same structure as the first connecting member 311, and the fourth connecting member 422 has the same structure as the second connecting member 312.

In another possible implementation, the third connecting member 421 is a screw, and the fourth connecting member 422 is a nut.

In some embodiments, the thickness of the bottom case 130 is 0.3mm or less, and the thickness of the upper cover 140 is 0.2mm or less.

Illustratively, the thickness of the bottom case 130 may be 0.1mm, or the thickness of the bottom case 130 may be 0.2 mm.

It can be understood that when the thickness of the bottom case 130 is greater than 0.3mm, the volume of the battery as a whole becomes large, and the energy density of the battery is reduced.

Illustratively, the thickness of the upper cover 140 may be 0.1mm, or alternatively, the thickness of the upper cover 140 may be 0.15 mm.

It can be understood that, when the thickness of the upper cover 140 is greater than 0.2mm, the volume of the battery as a whole becomes large, and the energy density of the battery is reduced.

It should be noted that the thickness of the bottom case body 131 in the bottom case 130 may not be the same as the thickness of the partition 110, for example, the thickness of the partition 110 may be smaller than the thickness of the bottom case body 131, so that the energy density of the battery may be improved.

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

1. A battery is characterized by comprising a shell and at least two battery cells positioned in the shell;

the shell comprises a partition board, the partition board divides the shell into at least two mutually isolated accommodating cavities, and the at least two accommodating cavities are arranged side by side;

each accommodating cavity is provided with at least one battery cell;

the battery cell is characterized in that the partition board is provided with a connecting unit, and two adjacent battery cells are electrically connected through the connecting unit.

2. The battery of claim 1, wherein the battery cell comprises a cell body and tabs disposed on the cell body, and the tabs of the battery cells are connected in series or in parallel through the connection unit.

3. The battery of claim 2, wherein the tabs comprise a first tab and a second tab with opposite polarity to the first tab, and the first tab of one of the two adjacent cells is electrically connected with the second tab of the other cell through the connection unit;

4. The battery of claim 2, wherein the housing comprises a bottom shell and an upper cover, the bottom shell comprises a bottom shell body, the bottom shell body has a receiving groove, the partition is disposed in the receiving groove, and the upper cover is disposed on the bottom shell to enclose each receiving cavity;

the connecting unit is inserted on the partition board.

5. The battery of claim 3, wherein the connection unit comprises a first connection assembly, the first connection assembly comprises a first connection piece and a second connection piece which are oppositely arranged, and the first connection piece and the second connection piece are respectively positioned in different accommodating cavities;

the partition board is provided with a first mounting hole, and one of the first connecting piece and the second connecting piece is electrically connected with the other one of the first connecting piece and the second connecting piece through the first mounting hole.

6. The battery of claim 5, wherein the first connector comprises a first connecting segment and a second connecting segment, the first connecting segment being connected with the second connecting segment;

the second connecting piece is provided with a connecting hole;

the first connecting section is located hold the intracavity, the second connecting section warp first mounting hole is inserted and is located in the connecting hole, the one end that the second connecting section deviates from first connecting section has the bulge, the bulge with the second connecting piece deviates from the one side butt of first connecting section.

7. The battery according to claim 6, wherein an area of a cross section of the protrusion decreases in a direction from the first connection section to the second connection section.

8. The battery of claim 7, wherein the connecting unit further comprises at least two first transition pieces, two first transition pieces are located in different accommodating cavities, the first connecting piece is electrically connected with the tab of one of the two adjacent battery cells through one first transition piece, and the second connecting piece is electrically connected with the tab of the other battery cell through the other transition piece.

9. The battery of claim 6, wherein the connection unit further comprises at least two first sealing gaskets, at least one of the first sealing gaskets is disposed between the first connection member and the separator, and at least one of the first sealing gaskets is disposed between the second connection member and the separator.

10. The battery of claim 9, wherein at least one of the first sealing gaskets comprises a sealing gasket body and a sealing post, the sealing post is connected to the sealing gasket body, the sealing post is provided with a first through hole, an axis of the first through hole is aligned with an axis of the sealing post, the sealing gasket body is provided with a second through hole, the first through hole and the second through hole are correspondingly arranged, the sealing post is inserted into the first mounting hole, and the sealing post is located between the partition board and the second connecting section.

11. The battery of claim 4, further comprising at least two lead-out units, the lead-out units comprising a second interposer and a second connection assembly;

the second adapter sheet is positioned in the accommodating cavity and connected with the lug of the battery cell;

the second connecting assembly is partially positioned outside the bottom shell, and the second connecting assembly is electrically connected with the second adapter sheet.

12. The battery of claim 11, wherein the bottom case body comprises a bottom plate and a side plate, the side plate is disposed around the bottom plate, the side plate and the bottom plate together form the receiving groove, and the side plate has a second mounting hole;

the other one of the third connecting piece and the fourth connecting piece is positioned outside the bottom shell and is connected with the other one of the third connecting piece and the fourth connecting piece through the second mounting hole.

13. The battery according to claim 12, wherein the lead-out unit further comprises at least two second sealing gaskets, at least one of the second sealing gaskets is disposed between the third connecting member and the side plate, and at least one of the second sealing gaskets is disposed between the fourth connecting member and the side plate.

14. The battery according to claim 4, wherein the bottom case has a thickness of 0.3mm or less, and the upper cover has a thickness of 0.2mm or less.