CN110021777B - Pole core, battery unit, battery module and car - Google Patents

Pole core, battery unit, battery module and car Download PDF

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Publication number
CN110021777B
CN110021777B CN201810476322.1A CN201810476322A CN110021777B CN 110021777 B CN110021777 B CN 110021777B CN 201810476322 A CN201810476322 A CN 201810476322A CN 110021777 B CN110021777 B CN 110021777B
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China
Prior art keywords
pole
expansion
area
cover plate
post
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CN201810476322.1A
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Chinese (zh)
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CN110021777A (en
Inventor
何龙
沈晞
江文锋
蒋露霞
胡世超
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BYD Co Ltd
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BYD Co Ltd
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Publication of CN110021777A publication Critical patent/CN110021777A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention relates to the field of batteries, and discloses a pole core, a battery unit, a battery module and an automobile, wherein the pole core comprises a pole core main body (1) and a pole lug (2), the pole core main body (1) comprises an expansion end (11), the expansion end (11) is provided with an external structure adaptation area and an expansion area (111) protruding relative to the external structure adaptation area, the external structure adaptation area comprises a pole post adaptation area (112), the pole post adaptation area (112) is recessed relative to the expansion area (111) to form a pole post installation space, one end of the pole lug (2) is connected with the expansion area (111), and the other end of the pole lug extends into the pole post installation space. Through above-mentioned technical scheme, in some terminal surfaces of utmost point core main part, set up the utmost point post adaptation district that corresponds to utmost point post respectively and for the convex dilatation district of utmost point post adaptation district to increase the volume of utmost point core main part in the near finite space of utmost point post, improved battery capacity.

Description

Pole core, battery unit, battery module and car
Cross Reference to Related Applications
The application requires priority of a chinese patent application with application number 201810015504.9 filed on day 1 and 8 in 2018, a chinese patent application with application number 201810016060.0 filed on day 1 and 8 in 2018, a chinese patent application with application number 201810015506.8 filed on day 1 and 8 in 2018, a chinese patent application with application number 201810016052.6 filed on day 8 in 2018, a chinese patent application with application number 201810015502.X filed on day 1 and 8 in 2018, a chinese patent application with application number 201810016520.X filed on day 1 and 8 in 2018, a chinese patent application with application number 201810015503.4 filed on day 1 and 8 in 2018, and a chinese patent application with application number 201810016056.4 filed on day 1 and 8 in 2018.
Technical Field
The invention relates to the field of batteries, in particular to a pole core, a battery unit, a battery module and an automobile.
Background
With the development of science and technology, various electronic devices, electric tools, etc. are widely used, such as mobile phones, electric vehicles, etc., as core components, the performance of the battery has an important influence on the overall performance and the use experience, and particularly, the capacity of the battery determines the overall endurance and is an important concern of users.
The battery comprises a shell and a pole core arranged in the shell, wherein the volume of the pole core is an important determining factor of the battery capacity, in electronic equipment and electric tools, the installation environment of the battery basically determines the space occupied by the battery, the whole volume of the battery is difficult to increase without limitation, and the battery capacity is limited.
Disclosure of Invention
An object of the present invention is to provide a pole piece to increase battery capacity in the presence of space limitations.
In order to achieve the above object, the present invention provides a pole core, wherein the pole core includes a pole core main body and a pole tab, the pole core main body includes an expansion end, the expansion end is provided with an external structure adapting region and an expansion region protruding relative to the external structure adapting region, the external structure adapting region includes a pole adapting region, the pole adapting region is recessed relative to the expansion region to form a pole mounting space, one end of the pole tab is connected to the expansion region, and the other end of the pole tab extends into the pole mounting space.
Preferably, the dilatation district includes dilatation top surface and dilatation side, utmost point ear is including being located the first plate section of dilatation top surface, being located the second plate section of dilatation side and extending to third plate section in the utmost point post installation space.
Preferably, the tab is integrally formed with the core body.
Preferably, the capacity expansion end is provided with a capacity expansion area positioned in the middle and two pole column adaptation areas respectively positioned at two sides of the capacity expansion area.
Preferably, the expansion end comprises a pole fitting area located in the middle and two expansion areas located on two sides of the pole fitting area respectively.
Preferably, the dilatation end is provided with three the dilatation district and two utmost point post adaptation district, adjacent two be provided with one between the dilatation district utmost point post adaptation district.
Preferably, the pole piece main part includes two the dilatation end, every dilatation end all is provided with a utmost point post adaptation district.
Preferably, the two expansion ends are respectively located at two opposite ends of the pole core main body.
Preferably, the pole fitting regions are aligned or staggered with respect to each other.
Preferably, the expansion end is provided with one expansion area and one pole fitting area.
Preferably, the expansion end is provided with one pole fitting area and two expansion areas which are respectively positioned at two sides of the pole fitting area.
Preferably, the outer structural adaptation zone further comprises a cooling structural adaptation zone recessed with respect to the expansion zone to form a cooling structural installation space.
In addition, the invention also provides a battery unit, wherein the battery unit comprises a shell, a cover plate and the pole core, the shell is provided with an opening, the opening is closed by the cover plate, and the pole core is arranged in the shell.
Preferably, the cover plate is provided with a cover plate body and a cover plate expansion cavity which protrudes outwards relative to the cover plate body; and/or the housing is provided with a housing expansion chamber protruding outwards, wherein the expansion region is at least partially accommodated in the cover plate expansion chamber and/or the housing expansion chamber.
Preferably, an inner lead tab is disposed at an inner side of the cap plate body, the battery unit includes a post penetrating through the cap plate body and coupled to the inner lead tab, and the tab is coupled to the post through the inner lead tab.
Preferably, the cover plate body is sunken relative to the cover plate expansion cavity to form a cover plate pole space, and the pole mounting space is arranged corresponding to the cover plate pole space.
In addition, the invention also provides a battery module, wherein the battery module comprises the battery unit.
In addition, the invention also provides an automobile, wherein the automobile comprises at least one battery module.
Through above-mentioned technical scheme, in some terminal surfaces of utmost point core main part, set up respectively and correspond to utmost point post adaptation district of utmost point post and for the convex dilatation district of utmost point post adaptation district to utmost point ear extends to the shape of adaptation district in order to adapt to utmost point core main part from the dilatation district, thereby increases the volume of utmost point core main part in the near finite space of utmost point post, has improved battery capacity.
Drawings
FIG. 1 is a perspective view of a pole piece according to one embodiment of the present invention;
FIG. 2 is a perspective view of a pole piece according to one embodiment of the present invention;
FIG. 3 is a perspective view of a pole piece according to one embodiment of the present invention;
FIG. 4 is a perspective view of a pole piece according to one embodiment of the present invention;
FIG. 5 is a perspective view of a pole piece according to one embodiment of the present invention;
FIG. 6 is a perspective view of a housing according to an embodiment of the present invention;
FIG. 7 is a perspective view of the outside of a cover plate according to an embodiment of the present invention;
FIG. 8 is a perspective view of the inside of a cover plate according to an embodiment of the present invention;
fig. 9 is an exploded view of a battery cell according to an embodiment of the present invention.
Description of the reference numerals
1 pole core main body and 2 pole lugs
3 case 4 cover plate
5 pole 6 internal lead-out sheet
11 capacity expansion end
111 expansion region 112 pole adaptation region
113 cooling structure adaptation zone
1111 capacity expansion top surface 1112 capacity expansion side surface
21 first plate section 22 second plate section
23 third plate section
31 housing expansion chamber 32 opening
41 cover board expanding cavity 42 cover board body
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The invention provides a pole core, wherein the pole core comprises a pole core main body 1 and a pole lug 2, the pole core main body 1 comprises an expansion end 11, the expansion end 11 is provided with an external structure adaptation area and an expansion area 111 protruding relative to the external structure adaptation area, the external structure adaptation area comprises a pole column adaptation area 112, the pole column adaptation area 112 is recessed relative to the expansion area 111 to form a pole column installation space, one end of the pole lug 2 is connected with the expansion area 111, and the other end of the pole lug extends into the pole column installation space.
The utmost point core includes utmost point core main part 1 and utmost point ear 2, and wherein one end of utmost point core main part 1 is for expanding holding end 11, and the dilatation end 11 is provided with exterior structure adaptation district (for example, utmost point post adaptation district 112 and cooling structure adaptation district 113) and dilatation district 111, exterior structure adaptation district need with other exterior structure cooperations and can not outwards bulge regional utmost point core main part 1 protrusion outside the exterior structure adaptation district and form dilatation district 111, wherein, exterior structure adaptation district for example utmost point post adaptation district 112 is compare in dilatation district 111 sunken and the space that forms is utmost point post installation space, can be used for installing battery unit's utmost point post.
In the invention concept of the scheme, the capacity expansion is performed on one end of the pole core mounting pole, namely the capacity expansion end 11, in the capacity expansion end 11, the area matched with the pole core or other external structures (cooling pipes and the like) is limited by the pole core 5 and cannot protrude outwards, and the other areas are not occupied by the pole core 5 and have available space, so that the pole core main body 1 of the part of area is set to protrude outwards, namely the capacity expansion area 111. The fall space formed by the expansion area 111 and the post fitting area 112 is the post mounting space for mounting the post, and of course, the post may be entirely disposed in the post mounting space or only a part of the post may be disposed in the mounting space.
Because the expansion end 11 is formed into a concave-convex structure, the arrangement of the tab 2 also needs to adapt to such a structure, when the tab 2 is connected to the expansion area 111, in order to be electrically connected with the pole in the pole fitting area 112, the tab 2 needs to extend from the expansion area 111 into the pole mounting space, so as to realize the electrical connection between the pole and the pole core main body 1.
Specifically, the expansion area 111 includes an expansion top surface 1111 and an expansion side surface 1112, and the tab 2 includes a first plate segment 21 located on the expansion top surface 1111, a second plate segment 22 located on the expansion side surface 1112, and a third plate segment 23 extending into the pole mounting space. As shown in fig. 1, the tab 2 is formed substantially in a three-segment structure including a first plate segment 21, a second plate segment 22, and a third plate segment 23, the first plate segment 21 is disposed on an expanded top surface 1111, the second plate segment 22 is disposed on an expanded side surface 1112, and the third plate segment 23 extends into the post mounting space, that is, the shape of the tab 2 substantially corresponds to the structure of the connection of the post fitting region 112 and the expanded region 111, so that the tab 2 can extend into the post mounting space.
Further, the tab 2 is integrally formed with the core body 1. The tab 2 and the pole core main body 1 are integrally formed from a material for making the pole core, and the tab 2 includes two tabs as a positive electrode and a negative electrode. Of course, in other embodiments, the tab 2 may be additionally processed and connected to the core body 1.
According to an embodiment of the present invention, the expansion end 11 is provided with one expansion area 111 in the middle and two pole fitting areas 112 respectively located at two sides of the expansion area 111. As shown in fig. 1, in the expansion end 11 of the pole core main body 1, the expansion area 111 is disposed in the middle, the two pole fitting areas 112 are respectively located at two sides, that is, the two poles corresponding to the positive pole and the negative pole are both disposed in the pole mounting space of the same expansion end 11, the area between the two poles is not occupied by other structures, so that the expansion area 111 can be formed by protruding outwards, and one or two pole lugs are connected to the expansion area 111 and extend into the corresponding pole mounting space.
According to an embodiment of the present invention, the expansion end 11 includes one pole fitting area 112 located in the middle and two expansion areas 111 located at two sides of the pole fitting area 112. As shown in fig. 3, in the expansion end 11, the pole fitting area 112 may be disposed at a middle position, and the expansion areas 111 are located at two sides of the pole fitting area 112, that is, when the pole is disposed at the middle position of the expansion end 11, the expansion areas 111 may be disposed at two sides of the pole. In addition, in the pole fitting region 112, only one pole may be provided, or two poles may be provided.
According to an embodiment of the present invention, the expansion end 11 is provided with three expansion areas 111 and two pole fitting areas 112, and one pole fitting area 112 is disposed between two adjacent expansion areas 111. As shown in fig. 2, at the expansion end 11 with a substantially rectangular cross section, the expansion areas 111 and the pole fitting areas 112 are alternately arranged along the length direction of the cross section, and the expansion areas 111 are respectively arranged at both sides of each pole fitting area 112, that is, the areas at both sides of the two spaced pole mounting spaces are expanded to form three expansion areas 111, so that the space not occupied by the poles is fully utilized, the volume of the pole body 1 is expanded, and the expansion of the battery is realized.
According to an embodiment of the present invention, the pole body 1 includes two expansion ends 11, and each expansion end 11 is provided with a pole fitting area 112. The two expansion ends 11 may be disposed at different ends of the pole body 1, for example, the pole body 1 may be hexahedral, and the expansion ends 11 may be disposed at the top end, the side portion, the bottom end, and the like. In addition, each expansion end 11 is provided with a pole fitting region 112, that is, two poles (positive and negative) of the battery are provided on different end faces of the pole core body 1, and in each such end face, an area not occupied by the poles is expanded to form an expansion region 111. In addition, the pole body 1 may have other shapes such as a cylindrical shape, a hexagonal prism shape, or a polyhedral shape.
Further, the two expansion ends 11 are respectively located at two opposite ends of the pole core main body 1. As shown in fig. 3, 4, and 5, for the pole body 1 having a substantially hexahedral shape, the expansion ends 11 are provided at the top end and the bottom end of the pole body 1, respectively, but may be provided on both side portions opposite to each other, of course.
Further, the pole fitting regions 112 are aligned or staggered with respect to each other. In the pole body 1 of fig. 4, the pole fitting regions 112 at different expansion ends 11 are staggered from each other, whereas in the pole body 1 of fig. 3 and 5, the pole fitting regions 112 at different expansion ends 11 are aligned with each other, and these different arrangement modes represent different installation modes of the pole and are suitable for different battery structures.
According to an embodiment of the present invention, the expansion end 11 is provided with one expansion region 111 and one pole fitting region 112. As shown in fig. 4 and 5, the expansion end 11 with a substantially rectangular cross section is divided into two areas, and the pole fitting area 112 and the expansion area 111 occupy one area respectively, that is, the pole is disposed at the edge of one side of the expansion end 11, the position is set as the pole fitting area 112, and the other area is set as the expansion area 111.
According to an embodiment of the present invention, the expansion end 11 is provided with one pole fitting area 112 and two expansion areas 111 respectively located at two sides of the pole fitting area 112. As shown in fig. 3, the pole fitting area 112 is approximately disposed in the middle of the expansion end 11, and expansion areas 111 are respectively disposed on two sides of the pole fitting area 112, that is, the pole is approximately disposed in the middle of the expansion end 11, and areas on two sides of the pole can be expanded to form the expansion areas 111 protruding outwards. The two pole fitting regions 112 may be aligned or staggered with respect to each other, which may be adjusted according to the structure of the battery.
In addition, the external structure adapting region further includes a cooling structure adapting region 113, and the cooling structure adapting region 113 is recessed with respect to the expansion region 111 to form a cooling structure installation space. As shown in fig. 1 and fig. 9, after the pole core of the present solution is encapsulated by the housing, the pole core can be cooled by the cooling structure, so as to avoid the temperature of the battery being too high during use, one or more end surfaces of the pole core main body 1 indirectly (with the housing interval) contact with such a cooling structure, so that a cooling structure adapting region 113 needs to be provided, and the expansion end 11 can be arranged to protrude outward in a region outside the cooling structure adapting region 113 to increase the volume of the pole core main body 1, i.e. to form the expansion region 111.
In addition, the invention also provides a battery unit, wherein the battery unit comprises a shell 3, a cover plate 4 and the pole core in the scheme, the shell 3 is provided with an opening 32, the opening 32 is closed by the cover plate 4, and the pole core is arranged in the shell 3. The housing 3 and the cover plate 4 are fastened to each other to form a structure for accommodating the pole pieces, wherein the housing 3 may have one or more openings 32 and is closed by the cover plate 4, respectively.
Further, the cover plate 4 is provided with a cover plate body 42 and a cover plate expansion cavity 41 protruding outwards relative to the cover plate body 42; and/or the housing 3 is provided with an outwardly projecting housing expansion volume 31, wherein the expansion region 111 is at least partially accommodated in the cover expansion volume 41 and/or the housing expansion volume 31. As shown in fig. 6, 7, 8, and 9, the cover plate 4 and the housing 3 need to be adapted to the shape of the pole core main body 1, that is, the cover plate accommodating cavity 41 and/or the housing accommodating cavity 31 are formed to accommodate at least a portion of the accommodating area 111, wherein the cover plate 4 may correspond to the accommodating end 11 provided with the pole fitting area 112, and the portion of the housing 3 provided with the housing accommodating cavity 31 corresponds to the accommodating end 11 provided with the cooling structure fitting area 113.
In addition, an inner lead tab 6 is provided at the inner side of the cap plate body 42, the battery cell includes a post 5 passing through the cap plate body 42 and coupled to the inner lead tab 6, and the tab 2 is coupled to the post 5 through the inner lead tab 6. As shown in fig. 7 and 8, the inner side of the cover plate body 42 of the cover plate 4 is provided with the inner lead-out piece 6, the pole 5 can be disposed through the cover plate body 42 and connected to the inner lead-out piece 6, and the tab 2 is also connected to the inner lead-out piece 6 to achieve the electrical connection with the pole 5. Wherein, the tab 2, the inner lead-out piece 6 and the pole 5 are all made of conductive materials.
In addition, the cover plate body is sunken to form a cover plate pole space relative to the cover plate expansion cavity, and the pole mounting space corresponds to the cover plate pole space. A part of the cover plate 4 protrudes outward to form a cavity structure, i.e., the cover plate expansion cavity 41, the non-protruding region is the cover plate body 42, the cover plate body 42 can cover the post adaptation region 112 of the pole core main body 1, therefore, the cover plate body 42 is recessed relative to the cover plate expansion cavity 41 to form a cover plate post space and a post mounting space, and the post 5 is at least partially located in the cover plate post space.
In addition, the invention also provides a battery module, wherein the battery module comprises the battery unit. The battery module may include a plurality of the battery cells, and the plurality of battery cells may be connected in series or in parallel to supply power.
In addition, the invention also provides an automobile, wherein the automobile comprises at least one battery module.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (17)

1. The pole core is characterized by comprising a pole core main body (1) and a pole lug (2), wherein the pole core main body (1) comprises an expansion end (11), the expansion end (11) is provided with an external structure adaptation area and an expansion area (111) protruding relative to the external structure adaptation area, the external structure adaptation area comprises a pole column adaptation area (112), the pole column adaptation area (112) is sunken relative to the expansion area (111) to form a pole column installation space, one end of the pole lug (2) is connected with the expansion area (111), and the other end of the pole lug extends into the pole column installation space;
wherein, flash zone (111) are including flash top surface (1111) and flash side face (1112), utmost point ear (2) are including being located flash top surface (1111) first plate section (21), being located flash side face (1112) second plate section (22) and extend to third plate section (23) in the utmost point post installation space.
2. The pole core according to claim 1, characterized in that the tabs (2) are integrally formed with the pole core body (1).
3. Pole core according to claim 1, characterized in that the expansion end (11) is provided with one expansion area (111) in the middle and two pole fitting areas (112) on either side of the expansion area (111).
4. The pole core of claim 1, wherein the expansion end (11) comprises one pole fitting region (112) in the middle and two expansion regions (111) on both sides of the pole fitting region (112).
5. The pole core of claim 1, wherein the expansion end (11) is provided with three expansion regions (111) and two pole fitting regions (112), and one pole fitting region (112) is provided between two adjacent expansion regions (111).
6. The pole piece according to claim 1, characterized in that the pole piece body (1) comprises two of the expansion ends (11), each expansion end (11) being provided with one pole fitting region (112).
7. The pole piece of claim 6, wherein the two expansion ends (11) are located at opposite ends of the pole piece body (1).
8. The pole core of claim 7, wherein the pole fitting regions (112) are aligned or staggered with respect to each other.
9. The pole core according to claim 8, characterized in that the expansion end (11) is provided with one expansion zone (111) and one pole fitting zone (112).
10. The pole core of claim 8, wherein the expansion end (11) is provided with one pole fitting region (112) and two expansion regions (111) respectively located at two sides of the pole fitting region (112).
11. The pole piece of claim 1, wherein the outer structural adaptation zone further comprises a cooling structural adaptation zone (113), the cooling structural adaptation zone (113) being recessed with respect to the expansion zone (111) to form a cooling structure mounting space.
12. A battery cell, characterized in that it comprises a housing (3), a cover plate (4) and a pole piece according to any one of claims 1 to 11, the housing (3) having an opening (32), the opening (32) being closed by the cover plate (4), the pole piece being arranged in the housing (3).
13. The battery cell according to claim 12, characterized in that the cover plate (4) is provided with a cover plate body (42) and a cover plate expansion cavity (41) projecting outwardly with respect to the cover plate body (42); and/or the shell (3) is provided with a shell containing cavity (31) protruding outwards,
wherein the expansion region (111) is at least partially accommodated in the cover expansion volume (41) and/or the housing expansion volume (31).
14. A battery unit as claimed in claim 13, characterised in that the inner side of the cover plate body (42) is provided with an inner lead-out tab (6), the battery unit comprising a pole (5) passing through the cover plate body (42) and connected to the inner lead-out tab (6), the pole lug (2) being connected to the pole (5) by means of the inner lead-out tab (6).
15. The battery cell according to claim 14, characterized in that the cover body (42) is recessed relative to the cover expansion cavity (41) to form a cover post space, and the post mounting space is arranged corresponding to the cover post space.
16. A battery module characterized by comprising the battery cell according to any one of claims 12 to 15.
17. An automobile, characterized in that the automobile comprises at least one battery module according to claim 16.
CN201810476322.1A 2018-01-08 2018-05-17 Pole core, battery unit, battery module and car Active CN110021777B (en)

Applications Claiming Priority (16)

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CN201810016520 2018-01-08
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