CN115498238A

CN115498238A - Double-cell battery and battery pack

Info

Publication number: CN115498238A
Application number: CN202211176143.9A
Authority: CN
Inventors: 邓芳泽; 李一乐; 袁长福; 刘超; 宁大雕; 李进
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-20

Abstract

The application provides a double-battery-cell battery and a battery pack, wherein a first battery cell is arranged in a first shell and is surrounded by the first shell; the second battery cell is arranged in the second shell and is surrounded by the second shell; the pole lug of the first battery cell extends out of the first opening of the first shell, and the pole lug of the second battery cell extends out of the second opening of the second shell; the connecting assembly is used for connecting the first opening and the second opening, so that the first shell is communicated with the second shell. The first battery cell and the second battery cell are respectively arranged in the first shell and the second shell, the first shell is communicated with the second shell through the connecting assembly, and the length of the double-battery-cell battery is at least the sum of the lengths of the first battery cell and the second battery cell, so that the scheme of the hard shell battery cell with the longer length is realized. Adopt the two electric core battery structure that this application provided, need not to adopt the mode of a plurality of soft packages series connection, whole simple process, two electric core battery inner space utilization are high.

Description

Double-cell battery and battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a double-cell battery and a battery pack.

Background

In order to improve the space utilization rate of the battery pack, the current power batteries are developed towards the direction of lengthening the battery core, for example, the blade battery and the short-blade battery, and one reason for the development is that the long-battery-core battery can play a role in reinforcing the structural strength of the battery pack when being placed in the battery pack, so that the use of reinforcing ribs inside the battery pack is reduced.

When electric core does the long term, the income shell degree of difficulty of naked electric core also increases thereupon, naked electric core leads to damaging with the hard shell collision of battery in the income shell in-process easily, consequently, prior art adopts a plurality of shorter laminate polymer cores to establish ties the back usually, and in the hard shell of battery was put into to a plurality of laminate polymer cores of establishing ties again to form the scheme of the longer hard shell electric core of length, however, a plurality of laminate polymer cores establish ties and can lead to whole technology complicated, and the problem that inner space utilization is low.

Disclosure of Invention

An object of the embodiment of the application is to provide a two electric core battery and battery package for solve current long electric core battery, it is big to have the naked electric core to go into the shell degree of difficulty, and the problem that battery inner space utilization is low.

The embodiment of the application provides a double-battery-cell battery, which comprises a connecting assembly, a first shell, a first battery cell, a second shell and a second battery cell;

the first battery cell is arranged in the first shell and is surrounded by the first shell;

the second battery cell is arranged in the second shell and is surrounded by the second shell;

the electrode lug of the first battery cell extends out of the first opening of the first shell, and the electrode lug of the second battery cell extends out of the second opening of the second shell;

the connecting assembly is used for connecting the first opening and the second opening, so that the first shell is communicated with the second shell.

Among the above-mentioned technical scheme, two electric core batteries include first electric core and second electric core, first electric core and second electric core set up respectively in first casing and second casing, and make first casing and second casing intercommunication through coupling assembling, two electric core batteries's length is the length sum of first electric core and second electric core at least, thereby the scheme of the long crust electricity core of length has been realized, wherein, the length of first electric core and second electric core is shorter, first electric core and second electric core are separately gone into the shell degree of difficulty lower, and also need not to adopt the mode of a plurality of soft packet of series connections, whole simple process, two electric core batteries inside space utilization are high.

In some alternative embodiments, the connection assembly includes an upper housing cover and a lower housing cover, which are connected to form a cavity having openings on two sides, and the cavity is used for accommodating tabs of the first battery cell and the second battery cell.

Among the above-mentioned technical scheme, the inferior valve lid can be platelike structure, and the epitheca lid can be U type structure, forms both sides when epitheca lid and inferior valve lid are connected and has the open-ended cavity, and this cavity is used for holding the utmost point ear that first electric core stretches out first casing and the utmost point ear that second electric core stretches out the second casing.

In some alternative embodiments, the lower housing cover includes a base plate, a pole, and a seal insulator; the pole comprises a pole bottom and a communicating part; the bottom of the pole column is connected with the pole lugs of the first electric core and the second electric core;

the sealing insulating part is arranged between the substrate and the bottom of the pole;

one end of the communicating part is connected with the bottom of the pole, and the other end of the communicating part penetrates through the sealing insulating part and extends out of the substrate.

In some optional embodiments, the pole bottom portion includes a positive pole bottom portion and a negative pole bottom portion, the tabs of the first cell and the second cell respectively include a positive pole tab and a negative pole tab, the positive pole bottom portion is connected with the positive pole tab, and the negative pole bottom portion is connected with the negative pole tab.

Among the above-mentioned technical scheme, anodal utmost point ear of first electric core and the anodal utmost point ear of second electric core are all connected to anodal utmost point post bottom the anodal post, negative pole post bottom is connected to the negative pole utmost point ear of first electric core and second electric core to realized that first electric core and second electric core are parallelly connected in two inside electric core batteries, and first electric core and second electric core have shared a terminal including anodal utmost point post and negative pole utmost point post (the terminal here indicates coupling assembling), thereby the space of battery on its length direction has been practiced thrift, the inside space utilization of battery has been improved.

In some alternative embodiments, the seal insulator comprises a seal ring, a first plastic, and a second plastic; the lower shell cover also comprises a conduction block;

the communicating part is located to the sealing washer cover, and the bottom of utmost point post is connected to communicating part one end, and the communicating part other end is connected to the piece that switches on after passing second plastic, base plate, first plastic in proper order.

Among the above-mentioned technical scheme, first plastic, second plastic and sealing washer play sealed and insulating effect to, the second plastic still plays the spacing effect in the antipole post bottom, and first plastic still plays the spacing effect to the piece that switches on.

In some alternative embodiments, the lead block has a projection for welding with the busbar.

Among the above-mentioned technical scheme, the piece that switches on has the bellying, makes the whole L type that is of the piece that switches on, and the piece that switches on of this L type has bigger welded surface when welding with the busbar and connects to the piece that switches on of L type also provides the limiting displacement to the busbar, thereby makes the piece that switches on and the easier welded connection of busbar.

In some alternative embodiments, the length direction and the width direction of the dual-cell battery extend in a horizontal direction, and the height direction of the dual-cell battery extends in a vertical direction; the top end of the upper shell cover is provided with a first through groove along the height direction, the sunken depth of the first through groove is greater than the protruding height of the protruding part, and the first through groove is used for accommodating the protruding part of another double-cell battery when the multiple double-cell batteries are overlapped.

Among the above-mentioned technical scheme, go up the cap top and have the first through-groove along direction of height to the sunken degree of depth of first through-groove is greater than the bulge height of bellying, and in the battery package that a plurality of two electric core batteries laminating overlapping were placed, the bellying of the piece that switches on of busbar and adjacent two electric core batteries can be held simultaneously to first through-groove.

In some alternative embodiments, the upper housing cover further has second through grooves on both sides in the height direction, respectively, for passing the bus bars.

In the technical scheme, two sides of the upper shell cover are respectively provided with a second through groove, one through groove is used for a bus bar to pass through and is connected to the positive electrode conducting block, and the other through groove is used for the bus bar to pass through and is connected to the negative electrode conducting block.

In some optional embodiments, the gas-liquid separator further comprises a liquid filling hole and/or an explosion-proof valve, and the liquid filling hole and/or the explosion-proof valve are arranged on the first shell and the second shell.

In some optional embodiments, the first casing includes a first side casing surrounding the lengthwise side of the first battery cell, and first cover plates respectively disposed at third openings at one lengthwise end of the first side casing, and the other lengthwise end of the first side casing is a first opening; the first cover plate is used for covering the third opening, and a liquid injection hole and/or an explosion-proof valve can be arranged on the first cover plate;

among the above-mentioned technical scheme, first side casing can be that aluminum plate of certain thickness is buckled, is tailor-welded and forms, forms two openings about forming, and arbitrary face does not have the flange on this first side casing, can not occupy the battery package more spaces in the arbitrary direction.

In some optional embodiments, the second casing includes a second side casing surrounding the lengthwise side of the second battery cell, and second cover plates respectively disposed at fourth openings at one lengthwise end of the second side casing, and the other lengthwise end of the second side casing is a second opening; the second cover plate is used for covering the fourth opening, and a liquid injection hole and/or an explosion-proof valve can be arranged on the second cover plate;

among the above-mentioned technical scheme, the second side shell can be that the aluminum plate of certain thickness is buckled, is tailor-welded and forms, forms two openings about, and arbitrary face does not have the flange on this second side shell, can not occupy the battery package more spaces in the arbitrary direction.

The battery pack provided by the embodiment of the application comprises a bus bar and a plurality of double-battery-cell batteries, wherein the bus bar is connected to the conducting block of the connecting component of each double-battery-cell battery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

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

fig. 2 is a schematic view of a disassembled structure of a dual-cell battery provided in the embodiment of the present application;

fig. 3 is a schematic structural diagram of a lower housing cover according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an upper housing cover according to an embodiment of the present disclosure;

fig. 5 is a flowchart illustrating steps of a method for manufacturing a dual cell battery according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a battery pack according to an embodiment of the present application.

Icon: 1-first cell, 11-first positive electrode tab, 12-first negative electrode tab, 2-second cell, 21-second positive electrode tab, 22-second negative electrode tab, 3-first casing, 31-first side casing, 32-first cover plate, 33-first opening, 34-second opening, 35-third opening, 36-fourth opening, 4-second casing, 41-second side casing, 42-second cover plate, 5-connecting assembly, 51-lower casing, 52-upper casing, 53-positive electrode pole, 54-negative electrode pole, 55-first through groove, 56-second through groove, 61-positive electrode pole bottom, 611-communicating part, 62-second plastic, 63-first plastic, 64-positive electrode conducting block, 65-substrate, 66-negative pole bottom, 67-sealing ring, 68-negative sealing ring, 69-protruding part, 7-dual-cell battery, 8-longitudinal beam, 9-busbar.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a dual-battery cell 7 according to an embodiment of the present disclosure; fig. 2 is a schematic view of a disassembled structure of a dual-battery cell provided in the embodiment of the present application. As shown in the figure, the dual-cell battery 7 includes a connection assembly 5, a first case 3, a first cell 1, a second case 4, and a second cell 2; the first battery cell 1 is arranged in the first shell 3 and surrounded by the first shell 3; the second battery cell 2 is arranged in the second shell 4 and is surrounded by the second shell 4; the tab of the first cell 1 extends out of the first opening 33 of the first casing 3, and the tab of the second cell 2 extends out of the second opening 34 of the second casing 4; the connecting assembly 5 is used for connecting the first opening 33 and the second opening 34, so that the first housing 3 is communicated with the second housing 4.

In the embodiment of the present application, the dual-battery cell 7 includes a first battery cell 1 and a second battery cell 2, where the first battery cell 1 and the second battery cell 2 are respectively disposed in the first casing 3 and the second casing 4, and the first casing 3 is communicated with the second casing 4 through the connection assembly 5. The length of the double-cell battery 7 is at least the sum of the lengths of the first cell 1 and the second cell 2, so that the scheme of the hard shell cell with the long length is realized, wherein the lengths of the first cell 1 and the second cell 2 are short, the respective shell entering difficulty of the first cell 1 and the second cell 2 is low, a plurality of soft package series connection modes are not needed, the whole process is simple, and the utilization rate of the internal space of the double-cell battery 7 is high.

Specifically, referring to fig. 2, in some alternative embodiments, the connection assembly 5 includes an upper casing cover 52 and a lower casing cover 51, where the upper casing cover 52 and the lower casing cover 51 are connected to form a cavity with openings on two sides, and the cavity is used for accommodating tabs of the first battery cell 1 and the second battery cell 2. In the embodiment of the present application, the lower case cover 51 is a plate-shaped structure, two long sides of the plate-shaped structure are welded with one wide side of the first case 3 and one wide side of the second case 4, the upper case cover 52 is a U-shaped structure, two ends of the U-shaped structure are welded with two wide sides of the lower case cover 51 of the plate-shaped structure, a cavity with openings on two sides is formed when the upper case cover 52 and the lower case cover 51 are welded, and the cavity is used for accommodating the first positive electrode tab 11, the first negative electrode tab 12, the second positive electrode tab 21 and the second negative electrode tab 22. The first positive electrode tab 11 and the first negative electrode tab 12 are two tabs of the first battery cell 1, and the first positive electrode tab 11 and the first negative electrode tab 12 extend out of the right opening of the first shell 3; the second positive electrode tab 21 and the second negative electrode tab 22 are two tabs of the second battery cell 2, and the second positive electrode tab 21 and the second negative electrode tab 22 extend out of the left opening of the second casing 4.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a lower housing cover 51 according to an embodiment of the present disclosure.

In some optional embodiments, the lower case cover includes a substrate, a positive electrode post, a negative electrode post, and a seal insulator; the positive pole column comprises a positive pole column bottom 61 and a communication part 611 in the center of the positive pole column bottom 61; the negative post includes a negative post bottom 66, and a communication portion 611 at the center of the negative post bottom 66; the bottom 61 of the positive pole column is connected with positive pole lugs of the first battery cell and the second battery cell, and the bottom 66 of the negative pole column is connected with negative pole lugs of the first battery cell and the second battery cell;

the sealing insulating piece is arranged between the substrate and the bottom 61 of the positive pole; one end of the communication part 611 of the positive electrode pillar bottom part 61 is connected to the positive electrode pillar bottom part 61, and the other end of the communication part 611 passes through the seal insulator and protrudes out of the substrate. A seal insulator is disposed between the substrate and the cathode post bottom 66; one end of the communication portion 611 of the negative electrode column bottom portion 66 is connected to the negative electrode column bottom portion 66, and the other end of the communication portion 611 passes through the seal insulator and protrudes out of the substrate.

In the embodiment of the present application, the positive pole column bottom portion 61 connects the positive pole tab of the first electrical core 1 and the positive pole tab of the second electrical core 2 to the positive pole column 53, and the negative pole column bottom portion 66 connects the negative pole tab of the first electrical core 1 and the negative pole tab of the second electrical core 2 to the negative pole column 54, so that the first electrical core 1 and the second electrical core 2 are connected in parallel inside the dual-electrical-core battery 7, and the first electrical core 1 and the second electrical core 2 share one terminal (the terminal here refers to the connection assembly 5) including the positive pole column and the negative pole column, thereby saving the space of the battery in the length direction thereof, and improving the space utilization rate inside the battery.

In some alternative embodiments, the seal insulator includes a seal ring 68, a first plastic 63, and a second plastic 62; the lower shell cover also comprises a positive electrode conduction block and a negative electrode conduction block;

the sealing ring 68 is sleeved on the communicating part 611 of the positive pole column bottom part 61, one end of the communicating part 611 is connected with the positive pole column bottom part 61, and the other end of the communicating part sequentially passes through the second plastic 62, the substrate and the first plastic 63 and then is connected to the positive pole conducting block.

The sealing ring 68 is sleeved on the communicating part 611 of the negative pole column bottom part 66, one end of the communicating part 611 is connected with the negative pole column bottom part 66, and the other end of the communicating part sequentially passes through the second plastic 62, the substrate and the first plastic 63 and then is connected to the negative pole conducting block.

Among the above-mentioned technical scheme, first plastic 63, second plastic 62 and sealing washer 68 play sealed and insulating effect to, second plastic 62 still plays the spacing effect of positive post bottom 61 and negative pole post bottom 66, and first plastic 63 still plays the spacing effect of conducting through the piece to anodal and negative pole.

In some alternative embodiments, the positive and negative

electrode lead blocks

64 and 67 each have a projection 69 thereon, and the projections 69 are used for welding with the bus bar 9. The positive conducting block 64 and the negative conducting block 67 are provided with the protruding parts 69, so that the positive conducting block 64 or the negative conducting block 67 is L-shaped as a whole, the L-shaped conducting block is provided with a larger welding surface when being welded with the bus bar 9, and the L-shaped conducting block also provides a limiting effect on the bus bar 9, so that the positive conducting block 64 or the negative conducting block 67 is connected with the bus bar 9 by welding more easily.

In this application embodiment, all be provided with boss 69 on positive pole conduction block 64 and the negative pole conduction block 67 to, the boss 69 of positive pole conduction block 64 and negative pole conduction block 67 all is close to base plate 65 edge setting, conveniently welds with busbar 9.

The length direction (L direction in fig. 1) and the width direction (D direction in fig. 1) of the two-cell battery 7 as in fig. 1 extend in the horizontal direction, and the height direction (H direction in fig. 1) of the two-cell battery 7 extends in the vertical direction.

Referring to fig. 4, fig. 4 is a schematic structural diagram of the upper case cover 52 according to the embodiment of the present disclosure, a top end of the upper case cover 52 has a first through groove 55 along a height direction, a recessed depth of the first through groove 55 is greater than a protruding height of the protruding portion 69, and the first through groove 55 is used for accommodating the protruding portion 69 of another dual-cell battery 7 when a plurality of dual-cell batteries 7 are overlapped.

In the embodiment of the application, the top end of the upper housing cover 52 has a first through groove 55 along the height direction, and the depression depth of the first through groove 55 is greater than the protrusion height of the protrusion 69, and in a battery pack in which a plurality of double-cell batteries 7 are attached and overlapped, the first through groove 55 can accommodate the bus bar 9 and the protrusions 69 of the positive electrode conduction block 64 and the negative electrode conduction block 67 of the adjacent double-cell batteries 7 at the same time.

In some alternative embodiments, the upper case cover 52 further has second through grooves 56 on both sides in the height direction, respectively, and the second through grooves 56 are used for passing through the bus bars 9. In the embodiment of the present application, the upper housing cover 52 has second through grooves 56 on both sides thereof, wherein one second through groove 56 is used for the bus bar 9 to pass through and connect to the positive electrode conduction block, and the other second through groove 56 is used for the bus bar 9 to pass through and connect to the negative electrode conduction block.

In some alternative embodiments, a liquid filling hole and/or an explosion-proof valve (not shown in the figures) are further included, and the first casing 3 and the second casing 4 are provided with the liquid filling hole and/or the explosion-proof valve.

In some alternative embodiments, the first casing 3 includes a first side casing 31 surrounding the lengthwise side of the first battery cell 1, and first cover plates 32 respectively disposed at third openings 35 at one lengthwise end of the first side casing 31, and the other lengthwise end of the first side casing 31 is a first opening 33; the first cover plate 32 is used for covering the third opening 35, and a liquid injection hole and/or an explosion-proof valve can be arranged on the first cover plate 32; in the embodiment of the present application, first side casing 31 can be that aluminum plate of certain thickness is buckled, is tailor-welded and forms, forms two openings about forming, and arbitrary face does not have the flange on this first side casing 31, can not occupy more spaces on the battery package arbitrary direction.

Correspondingly, the second casing 4 includes a second side casing 41 surrounding the second electric core 2 along the length direction, and second cover plates 42 respectively disposed at the fourth openings 36 at one end of the second side casing 41 along the length direction, and the other end of the second side casing 41 along the length direction is a second opening 34; the second cover plate 42 is used for covering the fourth opening 36, and a liquid injection hole and/or an explosion-proof valve can be arranged on the second cover plate 42; in this application embodiment, the second side casing 41 can be formed by bending and welding aluminum plates with certain thicknesses, and two openings are formed on the left and right sides of the second side casing 41, and any surface of the second side casing 41 does not have a flange, so that more spaces in any direction of the battery pack cannot be occupied.

Referring to fig. 5, fig. 5 is a flowchart illustrating steps of a method for manufacturing a dual-cell battery 7 according to an embodiment of the present disclosure, including:

step 100, installing a first battery cell 1 into a first side shell 31, and then welding a first cover plate 32 with the first side shell 31; a second cell 2 is installed in the second side edge shell 41, and then a second cover plate 42 is welded to the second side edge shell 41;

step 200, welding the left end and the right end of the lower shell cover 51 with one wide side of the opening of the first side shell 31 and the second side shell 41 respectively;

step 300, respectively welding a positive electrode tab and a negative electrode tab of the first battery cell 1 with a positive electrode pole 53 and a negative electrode pole 54 of the lower shell cover 51; respectively welding a positive electrode tab and a negative electrode tab of the second battery cell 2 with a positive electrode pole 53 and a negative electrode pole 54 of the lower casing cover 51;

step 400, welding the contact positions of the upper shell cover 52, the lower shell cover 51, the first side shell 31 and the second side shell 41 in pairs.

The battery pack provided by the embodiment of the application comprises a bus bar 9 and a plurality of double-battery-cell batteries 7, wherein the bus bar 9 is connected to the pole of the connecting component 5 of each double-battery-cell battery 7.

The battery pack provided by the embodiment comprises at least one battery pack, wherein the battery pack comprises a plurality of double-cell batteries 7 which are overlapped with each other, and the largest surfaces of any two adjacent double-cell batteries 7 in the battery pack are attached to each other.

In the embodiment of the present application, since the protruding portion on the positive electrode conducting block and the negative electrode conducting block of the lower case cover 51 are adapted to the first through groove 55 of the upper case cover 52, when a plurality of double-cell batteries 7 are stacked, in two adjacent double-cell batteries 7, the first through groove 55 of one of the double-cell batteries 7 can accommodate the protruding portion of the other double-cell battery 7, so that the protruding portion does not occupy the space in the length direction, the width direction and the height direction of the battery pack, and the space utilization rate of the whole battery pack is improved.

In some optional embodiments, referring to fig. 6, fig. 6 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure, a length direction of a dual-electric-core battery 7 in the battery pack is parallel to a width direction (H1 direction in the drawing) of the battery pack, a bus bar 9 is located at a position of a connecting assembly 5 of the dual-electric-core battery 7, and the bus bar 9 is connected to a pole of each dual-electric-core battery 7. In the embodiment of the application, the length direction of the double-cell batteries 7 is arranged along the width direction of the battery pack, the multiple double-cell batteries 7 form the battery pack along the length direction of the battery pack, and the height direction of the battery pack is one layer of battery pack, so that each double-cell battery 7 can play a role in strengthening the structural strength of the battery pack in the width direction. At this time, the width of the battery pack is relatively fixed, and the width of the battery pack is about a multiple of the length L of the dual-cell battery 7, but the length of the battery pack can be flexibly set, and the length of the battery pack is determined by the number of the dual-cell batteries 7 in the battery pack and the thickness of each dual-cell battery 7.

The battery pack of the present embodiment further has a longitudinal beam 8; the battery pack is arranged on each of two sides of the longitudinal beam 8, and the longitudinal beam 8 is parallel to the two edge beams. It should be clear that the longitudinal beam 8 here can also be a plurality of longitudinal beams 8, the longitudinal beam 8 plays a role in reinforcing the structural strength of the battery pack in the length direction, and because the double-cell battery 7 plays a role in reinforcing the structural strength of the battery pack in the width direction, the strength of the battery pack in the length direction and the strength of the battery pack in the width direction are both ensured.

In some optional embodiments, the longitudinal beam 8 may not be provided in the battery pack while the length direction of the dual-battery cells 7 in the battery pack is parallel to the width direction of the battery pack, and at this time, because the longitudinal beam 8 is not provided in the battery pack, only one battery pack is provided in the battery pack, that is, one battery pack is formed by all the dual-battery cells 7 in the battery pack, and the space utilization rate of the battery pack is higher at this time.

In some alternative embodiments, the arrangement of the two-cell batteries 7 in the battery pack may be further according to the following rules: the length direction of the double-cell batteries 7 is arranged along the length direction (L1 direction in the drawing) of the battery pack, a plurality of double-cell batteries 7 form a battery pack along the width direction of the battery pack, and a layer of battery pack is arranged in the battery pack along the height direction of the battery pack.

In the embodiment of the present application, the arrangement of the dual-cell battery 7 in the battery pack is as follows: the length direction of two electric core batteries 7 arranges along battery package length direction, and a plurality of two electric core batteries 7 form the group battery along battery package width direction, and it is the one deck group battery to follow battery package direction of height in the battery package, and two electric core batteries 7 can play the effect of reinforcing battery package length direction structural strength to because two electric core batteries 7 have played the effect of reinforcing battery package length direction structural strength, battery package length direction and width direction's intensity has all obtained the assurance. When the arrangement mode of the embodiment is adopted, the length of the battery pack is relatively fixed, and the length of the battery pack is about multiple times of the length of the double-battery cell 7, however, the width of the battery pack can be flexibly set, and the width of the battery pack is determined by the number of the double-battery cell 7 in the battery pack and the thickness between the double-battery cells 7.

In some alternative embodiments, the length direction of the dual-cell battery 7 is arranged along the length direction of the battery pack, and the battery pack is internally provided with a cross beam along the width direction of the battery pack, and two sides of the cross beam are respectively provided with one battery pack.

It should be clear that the crossbeam here can be many crossbeams, and the crossbeam plays the effect of strengthening battery package width direction structural strength to because two electric core batteries 7 have played the effect of strengthening battery package length direction structural strength, battery package length direction and width direction's intensity has all obtained the assurance.

In some optional embodiments, the length direction of the dual-cell batteries 7 is arranged along the length direction of the battery pack, and meanwhile, the battery pack does not have a cross beam, at this time, because the battery pack does not have a cross beam inside, only one battery pack is arranged in the battery pack, that is, one battery pack is formed by all the dual-cell batteries 7 in the battery pack, and at this time, the space utilization rate of the battery pack is higher.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double-battery-cell battery is characterized by comprising a connecting assembly, a first shell, a first battery cell, a second shell and a second battery cell;

the pole ear of the first battery cell extends out of the first opening of the first shell, and the pole ear of the second battery cell extends out of the second opening of the second shell;

2. The dual-cell battery of claim 1, wherein the coupling assembly comprises an upper housing cover and a lower housing cover, the upper housing cover and the lower housing cover being coupled to form a cavity having openings on both sides, the cavity being configured to receive tabs of the first cell and the second cell.

3. The dual cell battery of claim 2, wherein the lower case cover comprises a substrate, a terminal post, and a sealing insulator; the pole comprises a pole bottom and a communicating part; the bottom of the pole is connected with the pole lugs of the first battery cell and the second battery cell;

4. The dual-cell battery of claim 3, wherein the bottom post portion comprises a positive post portion and a negative post portion, the tabs of the first cell and the second cell comprise a positive tab and a negative tab, respectively, the positive post portion is connected to the positive tab, and the negative post portion is connected to the negative tab.

5. The dual cell battery of claim 3, wherein the sealing insulator comprises a sealing ring, a first plastic, and a second plastic; the lower shell cover also comprises a conduction block;

the sealing ring is sleeved on the communicating part, one end of the communicating part is connected with the bottom of the pole column, and the other end of the communicating part sequentially penetrates through the second plastic, the substrate and the first plastic and then is connected to the conducting block.

6. The dual cell battery as claimed in claim 5, wherein the conduction block has a protrusion for welding with a bus bar.

7. The dual-cell battery of claim 6, wherein the length direction and the width direction of the dual-cell battery extend in a horizontal direction, and the height direction of the dual-cell battery extends in a vertical direction;

the top end of the upper shell cover is provided with a first through groove along the height direction, and the concave depth of the first through groove is greater than the convex height of the convex part; the first through groove is used for accommodating the bulge part of another double-cell battery when a plurality of double-cell batteries are overlapped.

8. The dual cell battery as claimed in claim 7, wherein the upper case cover further has second through recesses at both sides in a height direction, respectively, the second through recesses being adapted to pass bus bars.

9. The dual cell battery of claim 1, further comprising a charge hole and/or an explosion-proof valve, the charge hole and/or the explosion-proof valve being provided on the first case and the second case.

10. A battery pack comprising a bus bar and a plurality of the dual cell batteries of any one of claims 1-9; the bus bar is connected to the conduction block of the connection assembly of each of the dual-cell batteries.