CN211743217U - Battery and electric vehicle - Google Patents
Battery and electric vehicle Download PDFInfo
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- CN211743217U CN211743217U CN202020242817.0U CN202020242817U CN211743217U CN 211743217 U CN211743217 U CN 211743217U CN 202020242817 U CN202020242817 U CN 202020242817U CN 211743217 U CN211743217 U CN 211743217U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application provides a battery, which comprises a shell and an electric core assembly arranged in the shell, wherein the electric core assembly comprises N electric cores, and N is a positive integer greater than or equal to 2; n electric cores in the electric core assembly are sequentially connected along the length direction of the electric cores; in the electric core assembly, a first electrode leading-out component arranged on the second end face of the (n-1) th electric core is connected with a first electrode leading-out component arranged on the first end face of the (n) th electric core, and a second electrode leading-out component arranged on the second end face of the (n-1) th electric core is connected with a second electrode leading-out component arranged on the first end face of the (n) th electric core, so that the (n-1) th electric core and the (n) th electric core are electrically connected in parallel and are structurally connected in series. The application also provides an electric vehicle with the battery.
Description
Technical Field
The application relates to the field of batteries, in particular to a battery and an electric vehicle comprising the same.
Background
With the continuous popularization and expansion of new energy product application scenes, especially new energy vehicles, the requirements on the safety of a battery pack and the improvement of the energy volume density are great, and the method for improving the energy volume density is to increase the length of a single battery. How to increase the length of the single battery without increasing the total voltage of the single battery is a difficulty faced in the industry at present.
SUMMERY OF THE UTILITY MODEL
In view of the above, an aspect of the present application provides a battery, in which a plurality of cells are connected in parallel and connected in series in a space structure connection mode are disposed in a housing of a single battery, so that how to realize that a plurality of cells are connected in parallel on the basis of not increasing or not increasing the voltage of the single battery, and the space structure is in a battery design of series connection, thereby increasing the energy volume density of the single battery and the battery pack.
In an optional embodiment, in a single battery, the battery comprises a shell and an electric core assembly arranged in the shell, wherein the electric core assembly comprises N electric cores, and N is a positive integer greater than or equal to 2; the N battery cells are sequentially connected along the length direction of the battery cells; each electric core comprises a first end face and a second end face, the first end face and the second end face are arranged oppositely along the length direction of the electric core, a first electrode leading-out part and a second electrode leading-out part are arranged on the first end face and the second end face, and the polarities of the first electrode leading-out part and the second electrode leading-out part are opposite; in the battery assembly, the first electrode leading-out component arranged on the second end face of the (n-1) th battery cell is connected with the first electrode leading-out component arranged on the first end face of the (n) th battery cell, and the second electrode leading-out component arranged on the second end face of the (n-1) th battery cell is connected with the second electrode leading-out component arranged on the first end face of the (n) th battery cell.
In an optional embodiment, in a single battery cell, the first electrode lead-out member of the first end face and the second electrode lead-out member of the second end face are arranged at the same position, and the second electrode lead-out member of the first end face and the first electrode lead-out member of the second end face are arranged at the same position.
Furthermore, in the cell assembly, the arrangement positions of the first electrode leading-out part and the second electrode leading-out part on the first end surface of the (n-1) th cell are opposite to the arrangement positions of the first electrode leading-out part and the second electrode leading-out part on the first end surface of the nth cell; the arrangement positions of the first electrode leading-out part and the second electrode leading-out part on the second end face of the (n-1) th battery cell are opposite to the arrangement positions of the first electrode leading-out part and the second electrode leading-out part on the second end face of the nth battery cell.
In an optional embodiment, the battery cell includes a first pole piece, a second pole piece, and a separation film disposed between the first pole piece and the second pole piece, where the first pole piece, the separation film, and the second pole piece are wound to form the battery cell, the first electrode leading-out member is connected to the first pole piece, and the second electrode leading-out member is connected to the second pole piece.
Further, the first electrode leading-out component includes a plurality of first electrode units, along the thickness direction of the battery cell, the plurality of first electrode units located on the first end surface are stacked to form the first electrode leading-out component of the first end surface, and the plurality of first electrode units located on the second end surface are stacked to form the first electrode leading-out component of the second end surface.
Further, the plurality of first electrode units and the first pole piece are integrally formed.
In an optional embodiment, the second electrode leading-out part includes a plurality of second electrode units, in the thickness direction of the battery cell, the plurality of second electrode units located on the first end surface are stacked to form the second electrode leading-out part of the first end surface, and the plurality of second electrode units located on the second end surface are stacked to form the second electrode leading-out part of the second end surface.
Further, the plurality of second electrode units and the second pole piece are integrally formed.
In an optional embodiment, the battery further includes a spacer disposed between two adjacent battery cells, where the spacer has a first side and a second side that are disposed opposite to each other, and along a length direction of the battery cells, the first side abuts against the second end surface of the (n-1) th battery cell, and the second side abuts against the first end surface of the (n) th battery cell.
Further, the separator comprises a first separation block and a second separation block, and the electrode leading-out component between two adjacent battery cells is clamped between the first separation block and the second separation block.
Furthermore, one side of the first isolation block, which faces the second isolation block, is provided with a groove, and the connecting part of two adjacent electrode leading-out parts is arranged in the groove.
Further, along the length direction of the battery core, the width of the groove is smaller than that of the first isolation block.
In an optional embodiment, the housing includes a main body, a first cover plate and a second cover plate, the electric core assembly is disposed in the main body, and the first cover plate and the second cover plate are respectively disposed at two ends of the main body.
Furthermore, the outer peripheral side of the partition abuts against the inner peripheral surface of the main body part, the inner cavity of the main body part is divided into N mutually independent and sealed accommodating cavities by the N-1 partitions, and one battery cell is accommodated in each accommodating cavity.
Furthermore, all be equipped with on first apron and the second apron and annotate the liquid mouth, communicate respectively first hold the chamber with the Nth hold the chamber.
Furthermore, a liquid injection channel is formed in the partition, a liquid injection port corresponding to the liquid injection channel is formed in the side face of the main body, one end of the liquid injection channel is connected with the accommodating cavity which is not provided with the end part, and the other end of the liquid injection channel is connected with the outside through the liquid injection port in the side face of the main body.
In an optional embodiment, a first electrode leading-out member on the first end surface of the first cell is connected to the first electrode adaptor, a second electrode leading-out member on the second end surface of the nth cell is connected to the second electrode adaptor, and the first electrode adaptor and the second electrode adaptor respectively extend out of the housing from the first cover plate and the second cover plate.
In an optional embodiment, the shell is a cuboid and has a length L, a width H and a thickness D, wherein the length L is greater than the width H, the width H is greater than the thickness D, and the length L is 300-2400 mm.
Further, the thickness D is greater than or equal to 5mm and less than or equal to 20 mm.
In an alternative embodiment, the length L and the width H satisfy: L/H is 3-20.
In an optional embodiment, the number of the electric core assemblies is M, M is an integer greater than or equal to 2, and the M electric core assemblies are arranged in a stacked mode along the thickness direction of the electric core assemblies.
The application provides a battery module, including circuit board and battery, the battery is above-mentioned arbitrary any the battery, the circuit board electricity is connected the battery.
The application provides a battery pack, including packing body and battery, the battery be any above-mentioned battery, a plurality of the battery is acceptd in the packing body, and a plurality of the battery electricity is parallelly connected or is established ties.
The application also provides an electric vehicle which comprises an engine and the battery pack, wherein the engine is electrically connected with the battery pack.
The present application further provides an energy storage device comprising an energy converter and a battery as in any of the above embodiments, wherein the energy converter is electrically connected to the battery.
The application provides a power tool, including transmission assembly, driver and the battery of any above-mentioned embodiment, transmission assembly connects the driver, the driver electricity is connected the battery.
The battery that above-mentioned technical scheme provided, through in the battery cell casing, set up a plurality of electric cores, every electric core all has two at least opposite polarity's electrode extraction part, a plurality of electric cores are the series connection each other on spatial structure, and pass through electric parallel connection between the electrode extraction part with a plurality of electric cores, make two at least electric cores in the casing form spatial structure tandem type and electric parallel structure, thereby solved and carried out electric parallel connection's technical problem between a plurality of electric cores of battery cell internal structure polyphone, reached under the situation that keeps total voltage invariable, make a plurality of electric cores inside the battery cell be in the battery cell structure of series connection on spatial structure, realize that battery length increases, but the mesh that total voltage does not increase.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic perspective view of a battery in an embodiment.
Fig. 2 is a schematic structural view of an electric core assembly of the battery of fig. 1.
Fig. 3 is a schematic diagram of a single cell of the cell assembly in fig. 2.
Fig. 4 is a schematic view of a connection structure of a plurality of battery cells shown in fig. 3.
Fig. 5 is a schematic structural diagram of a single cell in another embodiment.
Fig. 6 is a schematic diagram of a connection structure of a plurality of battery cells shown in fig. 5.
Fig. 7 is a schematic perspective view of a single battery cell in an embodiment.
Fig. 8 is an exploded view of the electric core assembly shown in fig. 2.
Fig. 9 is an exploded view of the battery shown in fig. 1.
Fig. 10 is a perspective view of the electric core assembly installed in the housing.
Fig. 11 is a schematic cross-sectional view of the battery shown in fig. 1.
Fig. 12 is a schematic diagram of a connection structure in which a plurality of cells are electrically connected in series in a cell assembly.
Fig. 13 is a schematic structural diagram of a stack of multiple electrical core assemblies.
Fig. 14 is a side view of the stacked structure of fig. 13.
Fig. 15 is a block diagram of a battery module according to an embodiment.
Fig. 16 is a block diagram of a battery pack in an embodiment.
Fig. 17 is a block diagram of an electric vehicle in an embodiment.
Description of the main element symbols:
Accommodating chamber 14
First electrode lead-out member 22
Second electrode lead-out member 23
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The application provides a battery, which comprises a shell and an electric core assembly arranged in the shell, wherein the electric core assembly comprises N electric cores, and N is a positive integer greater than or equal to 2; the N battery cells are sequentially connected along the length direction of the battery cells; each electric core comprises a first end face and a second end face, the first end face and the second end face are arranged oppositely along the length direction of the electric core, a first electrode leading-out part and a second electrode leading-out part are arranged on the first end face and the second end face, and the polarities of the first electrode leading-out part and the second electrode leading-out part are opposite; in the battery assembly, the first electrode leading-out component arranged on the second end face of the (n-1) th battery cell is connected with the first electrode leading-out component arranged on the first end face of the (n) th battery cell, and the second electrode leading-out component arranged on the second end face of the (n-1) th battery cell is connected with the second electrode leading-out component arranged on the first end face of the (n) th battery cell.
The battery that above-mentioned technical scheme provided, through in the battery cell casing, set up a plurality of electric cores, every electric core all has two at least opposite polarity's electrode extraction part, a plurality of electric cores are the series connection each other on spatial structure, and pass through electric parallel connection between the electrode extraction part with a plurality of electric cores, make two at least electric cores in the casing form spatial structure tandem type and electric parallel structure, thereby solved and carried out electric parallel connection's technical problem between a plurality of electric cores of battery cell internal structure polyphone, reached under the situation that keeps total voltage invariable, make a plurality of electric cores inside the battery cell be in the battery cell structure of series connection on spatial structure, realize that battery length increases, but the mesh that total voltage does not increase.
Some embodiments of the present application are described in detail. In the following embodiments, features of the embodiments may be combined with each other without conflict.
Referring to fig. 1 and 2, a battery 100 includes a case 10 and a cell assembly 20 disposed in the case 10. The cell assembly 20 includes N cells 21, where N is a positive integer greater than or equal to 2. The N battery cells 21 are sequentially connected in a first direction to form a spatial series connection. The first direction may be a length direction of the battery cell 21, i.e., a transverse direction from a view point of fig. 2. Each of the battery cells 21 includes a first end surface 211 and a second end surface 212, and along the first direction, the first end surface 211 is disposed opposite to the second end surface 212. In the embodiment of the present application, the first end surface 211 and the second end surface 212 are two surfaces that are farthest away in the length direction of the battery cell 21. The first end surface 211 and the second end surface 212 are respectively provided with a first electrode leading-out part 22 and a second electrode leading-out part 23 for leading out current, and the polarities of the first electrode leading-out part 22 and the second electrode leading-out part 23 are opposite. In the battery core assembly 20, the first electrode leading-out component 22 disposed on the second end surface 212 of the (n-1) th battery cell 21 is connected to the first electrode leading-out component 22 disposed on the first end surface 211 of the (n) th battery cell 21, and the second electrode leading-out component 23 disposed on the second end surface 212 of the (n-1) th battery cell 21 is connected to the second electrode leading-out component 23 disposed on the first end surface 211 of the (n) th battery cell 21, so that the (n-1) th battery cell 21 and the (n) th battery cell 21 are electrically connected in parallel and are serially connected in structure.
Referring to fig. 3, in one embodiment of the present application, in a single battery cell 21, the first electrode leading-out part 22 of the first end surface 211 and the first electrode leading-out part 22 of the second end surface 212 are located at the same position, and the second electrode leading-out part 23 of the first end surface 211 and the second electrode leading-out part 23 of the second end surface 212 are located at the same position. The first electrode lead-out member 22 of the first end surface 211 is a positive electrode, the second electrode lead-out member 23 of the first end surface 211 is a negative electrode, the first electrode lead-out member 22 of the second end surface 212 is a positive electrode, and the second electrode lead-out member 23 of the second end surface 212 is a negative electrode.
Referring to fig. 4, when the plurality of battery cells 21 are connected to form the battery assembly 20, the first electrode leading-out members 22 respectively disposed on the end surfaces of the battery cells 21 are disposed at the same position, and the second electrode leading-out members 23 respectively disposed on the end surfaces of the battery cells are disposed at the same position. In the view of fig. 4, the first electrode drawing parts 22 of the plurality of battery cells 21 are aligned with each other and arranged at the upper half of the battery core assembly 20, and the second electrode drawing parts 23 of the plurality of battery cells 21 are aligned with each other and arranged at the lower half of the battery core assembly 20.
Referring to fig. 5, in another embodiment of the present application, for a single battery cell 21, the first electrode leading-out part 22 of the first end surface 211 and the second electrode leading-out part 23 of the second end surface 212 are located at the same position, and the second electrode leading-out part 23 of the first end surface 211 and the first electrode leading-out part 22 of the second end surface 212 are located at the same position. The first electrode lead-out member 22 of the first end surface 211 is a positive electrode, the second electrode lead-out member 23 of the first end surface 211 is a negative electrode, the first electrode lead-out member 22 of the second end surface 212 is a positive electrode, and the second electrode lead-out member 23 of the second end surface 212 is a negative electrode.
Referring to fig. 6, when a plurality of battery cells 21 are connected to form a battery assembly 20, the positions of the first electrode leading-out member 22 and the second electrode leading-out member 23 on the first end surface 211 of the (n-1) th battery cell 21 are opposite to the positions of the first electrode leading-out member and the second electrode leading-out member 23 on the first end surface 211 of the nth battery cell 21; the positions of the first electrode leading-out member 22 and the second electrode leading-out member 23 on the second end surface 212 of the (n-1) th cell 21 are opposite to the positions of the first electrode leading-out member 22 and the second electrode leading-out member 23 on the second end surface 212 of the nth cell 21. In other words, the first electrode lead-out member 22 and the second electrode lead-out member 23 are disposed at opposite positions on the adjacent two first end surfaces 211, and the first electrode lead-out member 22 and the second electrode lead-out member 23 are disposed at opposite positions on the adjacent two second end surfaces 212. In the embodiment of the present application, the N battery cells 21 are the same battery cells, and when the battery cells 21 shown in fig. 5 are connected to form the battery assembly 20, the battery cell connected after the first battery cell 21 needs to be properly turned over by 180 ° to meet the parallel connection requirement, the setting direction of the nth battery cell is opposite to that of the (N + 1) th battery cell, and the setting direction of the nth battery cell is the same as that of the (N + 2) th battery cell. In other embodiments, the N battery cells 21 may be different, specifically, the nth battery cell is the same as the (N + 2) th battery cell, and the nth battery cell is different from the (N + 1) th battery cell. In other words, the odd-numbered cells are cells of the same type, and the even-numbered cells are cells of another type.
Referring to fig. 7, the battery cell 21 includes a first pole piece 24, a second pole piece 25, and a separation film 26 disposed between the first pole piece 24 and the second pole piece 25, the polarities of the first pole piece 24 and the second pole piece 25 are opposite, and the first pole piece 24, the separation film 26, and the second pole piece 25 are wound to form the battery cell 21. The first electrode drawing member 22 is connected to the first pole piece 24 and has the same polarity as the first pole piece 24, and the second electrode drawing member 23 is connected to the second pole piece 25 and has the same polarity as the second pole piece 25.
In one embodiment of the present application, the first electrode drawing part 22 includes a plurality of pieces of the first electrode units 221, and the second electrode drawing part 23 includes a plurality of pieces of the second electrode units 231. Along the second direction, the plurality of first electrode units 221 located at the first end surface 211 are stacked to form the first electrode lead-out part 22 of the first end surface 211, the plurality of first electrode units 221 located at the second end surface 212 are stacked to form the first electrode lead-out part of the second end surface 212, the plurality of second electrode units 231 located at the first end surface 211 are stacked to form the second electrode lead-out part 23 of the first end surface 211, and the plurality of second electrode units 231 located at the second end surface 212 are stacked to form the second electrode lead-out part 23 of the second end surface 212. The second direction may be a thickness direction of the battery cells 21, and the first direction and the second direction are perpendicular to each other.
The plurality of first electrode units 221 are integrally formed with the first pole piece 24, and specifically, the plurality of first electrode units 221 are formed by cutting a raw material of a current collector of the first pole piece 24. The plurality of second electrode units 231 are integrally formed with the second electrode sheet 25, and specifically, the plurality of second electrode units 231 are formed by cutting a raw material of the current collector of the second electrode sheet 25.
It is understood that in other embodiments, the battery cell 21 is a laminated battery cell, and is formed by stacking a plurality of first pole pieces 24, a plurality of second pole pieces 25, and a separator 26.
Referring to fig. 1, 8 and 9, the battery 100 further includes a spacer 30, and one spacer 30 is disposed between two adjacent battery cells 21. The separator 30 has a first side 33 and a second side 34 which are oppositely disposed, and along the first direction, the first side 33 abuts against the second end surface 212 of the (n-1) th cell 21, and the second side 34 abuts against the first end surface 211 of the (n) th cell 21. The separator 30 includes a first separator block 31 and a second separator block 32, and an electrode lead-out component between two adjacent battery cells 21 is interposed between the first separator block 31 and the second separator block 32. The spacers 30 serve to space the individual battery cells 21 and increase the connection strength between the electrode lead-out members. The surface of one side of the first isolation block 31 facing the second isolation block 32 is provided with a groove 311, and the connecting part of two adjacent electrode leading-out parts is arranged in the groove 311. When the second separator 32 is engaged with the first separator 31, the connecting portions of the adjacent two electrode lead-out members are sealed in the separator. Along the first direction, the width of the groove 311 is smaller than the width of the first isolation block 31, which is beneficial to improving the sealing performance of the isolation member 30. In the embodiment of the present application, the number of the grooves 311 is the same as the number of the electrode lead-out members on each end surface, so that the connection part of each electrode lead-out member can be sealed separately, and the possibility of liquid leakage is reduced.
The housing 10 is substantially a rectangular parallelepiped, having a length L, a width H, and a thickness D, the length L being greater than the width H, the width H being greater than the thickness D. The length L is 400-2500 mm, the thickness D is greater than 10mm, and the size relation between the length L and the width H meets the formula: L/H is 3-20.
The housing 10 includes a main body 11, a first cover plate 12 and a second cover plate 13, the main body 11 is a substantially rectangular housing with two open ends, the electric core assembly 20 is inserted into the main body 11 in the direction of the arrow shown in fig. 9, and the first cover plate 12 and the second cover plate 13 are respectively disposed at two ends of the main body 11 to seal the electric core assembly 20 in the main body 11. With reference to fig. 10, after the cell assembly 20 is installed in the housing 10, the outer peripheral side of the spacer 30 abuts against the inner peripheral surface of the main body 11, the N-1 spacers 30 divide the inner cavity of the main body 11 into N independent and sealed accommodating cavities 14, and each accommodating cavity 14 accommodates one single cell 21. Along the length direction of the battery 100, the first battery cell 21 is accommodated in the first accommodating cavity 14, and the first electrode leading-out part 22 on the first end surface 211 of the first battery cell 21 extends out of the casing 10; the nth cell 21 is accommodated in the nth accommodation cavity 14, and the second electrode lead-out member 23 on the second end surface 212 of the nth cell 21 protrudes out of the housing 10. Further, the first electrode leading-out part 22 on the first end surface 211 of the first cell 21 is connected to the first electrode adaptor 27, the second electrode leading-out part 23 on the second end surface 212 of the nth cell 21 is connected to the second electrode adaptor 28, and the first electrode adaptor 27 and the second electrode adaptor 28 respectively extend out of the housing 10 from the first cover plate 12 and the second cover plate 13.
It is understood that in other embodiments of the present application, the first electrode leading-out part 22 and the second electrode leading-out part 23 on the first end surface 211 of the first cell 21, and the first electrode leading-out part 22 and the second electrode leading-out part 23 on the second end surface 212 of the nth cell 21 may simultaneously protrude out of the housing 10, so as to simplify the parallel circuit structure among the plurality of batteries 100, and the parallel and spatial serial connection of the plurality of batteries 100 can be completed without additional connecting leads or patch wires.
And the first cover plate 12 and the second cover plate 13 are respectively provided with a liquid injection port 15 which is communicated with the first accommodating cavity 14 and the Nth accommodating cavity 14, and electrolyte is filled into the first accommodating cavity 14 and the Nth accommodating cavity 14 from the liquid injection port 15. With reference to fig. 11, the separator 30 is provided with a liquid injection channel 35, the sidewall of the main body 11 is provided with a liquid injection port corresponding to the liquid injection channel 35, one end of the liquid injection channel 35 is connected to the non-end accommodating chamber 14, and the other end is connected to the outside through the liquid injection port on the main body 11, so as to facilitate the injection of the electrolyte into the accommodating chamber 14 located in the middle region. After the liquid injection process is completed, sealing plugs are filled in the liquid injection port 15 and the liquid injection channel 35 to complete the sealing of the shell 10. In the embodiment of the present application, the liquid injection channel 35 is substantially linear, and is opened obliquely downward from the end of the partition 30, so that the liquid injection channel 35 communicates with the accommodating cavity 14 from the side of the partition 30. In other words, one end of the liquid injection channel 35 is opened from the end of the separator 30, and the other end of the liquid injection channel 35 is opened from the side of the separator 30. In other alternative embodiments, the liquid injection channel 35 may also have other shapes, such as "L" shape, "S" shape, "T" shape, and the like, but the present application is not limited thereto.
Referring to fig. 12, in another embodiment of the present application, a plurality of battery cells 21 in a battery cell assembly 20 may also be electrically connected in series, a first electrode leading-out component 22 disposed at a second end surface 212 of an n-1 th battery cell 21 is connected to a second electrode leading-out component 23 disposed at a first end surface 211 of an nth battery cell 21, and the second electrode leading-out component 23 disposed at the second end surface 212 of the n-1 th battery cell 21 is connected to the first electrode leading-out component 22 disposed at the first end surface 211 of the nth battery cell 21, so that the n-1 th battery cell 21 and the nth battery cell 21 are electrically connected in series and structurally connected in series.
Referring to fig. 13 and 14, in other embodiments of the present application, the number of the electric core assemblies 20 is M, where M is an integer greater than or equal to 2. Along the thickness direction of electric core assembly 20, M electric core assemblies 20 are stacked to form an electric core, which can be accommodated in housing 10 or in a package bag to form a flexible package battery. The M electric core assemblies 20 arranged in a stacked mode are electrically connected in parallel or in series. The two electrode leading-out parts to be combined can be connected through an adapter 40, and the adapter 40 is approximately perpendicular to the first electrode leading-out part 22 or the second electrode leading-out part 23. In other alternative embodiments, the connection relationship between two adjacent electrode core assemblies 20 can be realized by bending the ends of the electrode lead-out parts and then combining the bent parts of the two electrode lead-out parts.
Specifically, along the length direction of the electric core assembly 20, the electric core assembly 20 includes a first end and a second end which are oppositely disposed, and in the embodiment of the present application, the first end and the second end are two ends which are farthest away from each other in the length direction of the electric core assembly 20. The first electrode leading-out part 22 positioned at the second end of the M-1 th electric core assembly 20 is connected with the first electrode leading-out part 22 positioned at the first end of the M-1 th electric core assembly 20, and the second electrode leading-out part 23 positioned at the second end of the M-1 th electric core assembly 20 is connected with the second electrode leading-out part 23 positioned at the first end of the M-1 th electric core assembly 20, so that the M electric core assemblies 20 are electrically connected in parallel. In another embodiment, the first electrode drawing part 22 located at the second end of the M-1 th electric core assembly 20 is connected with the second electrode drawing part 23 located at the first end of the M-1 th electric core assembly 20, and the second electrode drawing part 23 located at the second end of the M-1 th electric core assembly 20 is connected with the first electrode drawing part 22 located at the first end of the M-1 th electric core assembly 20, so as to realize the electric series connection of the M electric core assemblies 20.
Referring to fig. 15, the present application provides a battery module 200, which includes a circuit board 201 and a battery 100 in any one or a combination of the above embodiments, wherein the circuit board 201 is electrically connected to the battery 100.
Referring to fig. 16, the present application provides a battery pack 300, which includes a package 301 and a plurality of batteries 100, wherein the batteries 100 are the batteries 100 in any one or a combination of the above embodiments, the plurality of batteries 100 are accommodated in the package 301, and the plurality of batteries 100 are electrically connected in parallel or in series.
Referring to fig. 17, the present application further provides an electric vehicle 400, which includes an engine 401 and the battery pack 300 in the above embodiment, wherein the battery pack 300 is electrically connected to the engine 401 to provide electric energy to the engine 401.
In an alternative embodiment, the present application further provides an energy storage device comprising an energy converter and the battery 100 of any one or combination of the above embodiments, wherein the energy converter is electrically connected to the battery.
In another embodiment, the present application provides a power tool comprising a battery 100 of any one or a combination of the above embodiments, a transmission assembly connected to the driver, and a driver electrically connected to the battery.
Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.
Claims (10)
1. A battery, comprising:
a housing; and
an electrical core assembly disposed within the housing;
the battery cell assembly is characterized by comprising N battery cells, wherein N is a positive integer greater than or equal to 2;
the N battery cells are sequentially connected along the length direction of the battery cells;
each electric core comprises a first end face and a second end face, the first end face and the second end face are arranged oppositely along the length direction of the electric core, a first electrode leading-out part and a second electrode leading-out part are arranged on the first end face and the second end face respectively, the polarities of the first electrode leading-out part and the second electrode leading-out part are opposite, the arrangement positions of the first electrode leading-out part of the first end face and the second electrode leading-out part of the second end face are the same, and the arrangement positions of the second electrode leading-out part of the first end face and the first electrode leading-out part of the second end face are the same;
in the battery assembly, the first electrode leading-out component arranged on the second end face of the (n-1) th battery cell is connected with the first electrode leading-out component arranged on the first end face of the (n) th battery cell, and the second electrode leading-out component arranged on the second end face of the (n-1) th battery cell is connected with the second electrode leading-out component arranged on the first end face of the (n) th battery cell.
2. The battery of claim 1, wherein in the cell assembly, the first electrode lead-out member and the second electrode lead-out member are disposed at positions on the first end surface of the (n-1) th cell opposite to positions of the first electrode lead-out member and the second electrode lead-out member on the first end surface of the (n) th cell; the arrangement positions of the first electrode leading-out part and the second electrode leading-out part on the second end face of the (n-1) th battery cell are opposite to the arrangement positions of the first electrode leading-out part and the second electrode leading-out part on the second end face of the nth battery cell.
3. The battery of claim 1, wherein the N cells are the same cell, the nth cell is opposite to the (N + 1) th cell, and the nth cell is the same as the (N + 2) th cell.
4. The battery of claim 1, wherein the N cells are different cells, the nth cell is different from the (N + 1) th cell, and the nth cell is the same as the (N + 2) th cell.
5. The battery of claim 1, further comprising a spacer disposed between two adjacent cells, wherein the spacer has a first side and a second side opposite to each other, and the first side abuts against the second end surface of the (n-1) th cell and the second side abuts against the first end surface of the nth cell along the length direction of the cells.
6. The battery of claim 5, wherein the separator comprises a first separator block and a second separator block, and the electrode lead-out member between two adjacent cells is sandwiched between the first separator block and the second separator block.
7. The battery of claim 6, wherein a side of the first separator block facing the second separator block is recessed, and a connecting portion of two adjacent electrode lead-out members is disposed in the recess.
8. The battery according to claim 1, wherein the number of the cell assemblies is M, M being an integer greater than or equal to 2, and M of the cell assemblies are stacked in the thickness direction of the cell assemblies and electrically connected in series.
9. The battery of claim 8, wherein the electrode lead-out members of M said cell assemblies are connected by an adaptor; or M electric core components are connected with two adjacent electric core components by bending the electrode lead-out part and combining the bent parts.
10. An electric vehicle comprising an engine and a battery, wherein the battery is as defined in any one of claims 1 to 9, and the engine is electrically connected to the battery.
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|---|---|---|---|
| CN202020242817.0U CN211743217U (en) | 2020-03-02 | 2020-03-02 | Battery and electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020242817.0U CN211743217U (en) | 2020-03-02 | 2020-03-02 | Battery and electric vehicle |
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| CN211743217U true CN211743217U (en) | 2020-10-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022170492A1 (en) * | 2021-02-09 | 2022-08-18 | 宁德时代新能源科技股份有限公司 | Battery, power apparatus, and battery manufacturing method and device |
| WO2022237805A1 (en) * | 2021-05-14 | 2022-11-17 | 陕西奥林波斯电力能源有限责任公司 | Roll core for large-capacity battery, parallel roll core group, and large-capacity battery |
-
2020
- 2020-03-02 CN CN202020242817.0U patent/CN211743217U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022170492A1 (en) * | 2021-02-09 | 2022-08-18 | 宁德时代新能源科技股份有限公司 | Battery, power apparatus, and battery manufacturing method and device |
| WO2022237805A1 (en) * | 2021-05-14 | 2022-11-17 | 陕西奥林波斯电力能源有限责任公司 | Roll core for large-capacity battery, parallel roll core group, and large-capacity battery |
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