WO2023116149A1 - 电池单元、电池模组和车辆 - Google Patents

电池单元、电池模组和车辆 Download PDF

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Publication number
WO2023116149A1
WO2023116149A1 PCT/CN2022/125892 CN2022125892W WO2023116149A1 WO 2023116149 A1 WO2023116149 A1 WO 2023116149A1 CN 2022125892 W CN2022125892 W CN 2022125892W WO 2023116149 A1 WO2023116149 A1 WO 2023116149A1
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WO
WIPO (PCT)
Prior art keywords
pole
tab
battery unit
positive
cover
Prior art date
Application number
PCT/CN2022/125892
Other languages
English (en)
French (fr)
Inventor
王信月
袁万颂
段平安
温爱鹏
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to EP22909467.7A priority Critical patent/EP4395047A1/en
Priority to KR1020247013116A priority patent/KR20240063984A/ko
Publication of WO2023116149A1 publication Critical patent/WO2023116149A1/zh
Priority to US18/639,314 priority patent/US20240266696A1/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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/531—Electrode connections inside 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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

Definitions

  • the present application relates to the field of battery technology, and more specifically, to a battery unit, a battery module using the battery unit, and a vehicle including the battery module.
  • the battery usually includes an aluminum shell and a cell installed inside the aluminum shell.
  • the aluminum shell is usually not charged.
  • lithium will react with the aluminum shell during the reaction, and lithium ions will be embedded in the aluminum to form an aluminum-lithium alloy. , causing corrosion to the aluminum shell and affecting the service life of the battery.
  • a battery unit comprising: a casing, a cavity is defined in the casing; a pole core, the pole core is arranged in the cavity, and the pole core includes a first pole An ear and a second ear, one of the first ear and the second ear is a positive ear, the other of the first ear and the second ear is a negative ear, the The positive pole ear is connected and electrically connected to the housing; the first pole is electrically connected to the first pole ear; the second pole is electrically connected to the second pole Ear connection.
  • one end of the first tab or the second tab near the housing includes a plurality of connecting portions distributed at intervals.
  • the pole core has a long axis and a short axis
  • the first tab is set on the long axis or the short axis
  • the second tab is set on the long axis or the short axis. the minor axis.
  • a plurality of the connecting parts are distributed at intervals along the direction of the long axis.
  • connection parts are connected in series.
  • the housing includes: a lower part, the lower part defines the chamber with an opening; an upper cover, the upper cover is arranged on the opening for closing the chamber At least a part of the upper cover is connected to the positive tab by welding.
  • the first pole is connected to the upper cover to be electrically connected to the positive tab.
  • the positive tab is a bent piece with an open slot
  • the battery unit further includes: a first insulating side plate, the first insulating side plate is arranged in the open slot, so that At least a part of the positive tab is located between the first insulating side plate and the upper cover.
  • the first insulating side plate is connected to the pole core through an adhesive layer.
  • the battery unit further includes: a second insulating side plate, the second insulating side plate is arranged between the case and the negative tab, so that the case and the The above-mentioned negative tab insulation settings.
  • the second insulating side plate is connected to the pole core through an adhesive layer.
  • one of the first pole and the second pole is a positive pole, and the other of the first pole and the second pole is a negative pole.
  • the battery unit further includes: a pole cover plate, the pole cover plate is arranged on the housing, the pole cover plate is provided with the first pole and the Describe the second pole.
  • the battery unit further includes: a light cover plate, the light cover plate is located between the pole cover plate and the housing, and the light cover plate is respectively connected to the positive pole It is electrically connected with the casing, and is insulated from the negative pole.
  • the battery unit further includes: an explosion-proof valve cover plate, the explosion-proof valve cover plate is arranged on the short axis and is located on both sides of the long axis with the pole cover plate.
  • a battery module including the battery unit described in any one of the above embodiments.
  • a vehicle including the battery module described in any one of the above embodiments.
  • FIG. 1 is a schematic structural view of a battery according to an embodiment of the present application.
  • FIG. 2 is an exploded view of a battery according to an embodiment of the present application.
  • Fig. 3 is an enlarged view of the area A circled in Fig. 2;
  • Fig. 4 is a schematic diagram of a partial structure of a pole core according to an embodiment of the present application.
  • Fig. 5 is a schematic diagram of the connection between the first tab of the pole core and the upper cover according to the embodiment of the present application.
  • Housing 20 chamber 21; lower part 22; upper cover 23;
  • An object of the present application is to provide a new technical solution for a battery unit, which can solve the problem that the casing of the battery is easy to corrode in the prior art.
  • Another object of the present application is to provide a new technical solution for a battery module, including the above-mentioned battery unit.
  • Another object of the present application is to provide a new technical solution for a vehicle, including the above-mentioned battery module.
  • connecting the positive tab to the casing and electrically connecting it can not only realize the electrification of the casing, avoid corrosion of the casing, but also simplify the internal structure of the battery, and also facilitate the diversity of the placement positions of the positive tab. , for example, even if the positive tab is arranged on the long axis of the pole core, it can be conveniently electrically connected to the case.
  • the battery unit 100 according to the embodiment of the present application will be described in detail below with reference to the accompanying drawings.
  • a battery unit 100 includes a casing 20 , a pole core 10 , a first pole 41 and a second pole 42 .
  • a cavity 21 is defined in the casing 20, and the pole core 10 is disposed in the cavity 21.
  • the pole core 10 includes at least one first pole lug 11 and at least one second pole lug 12, the first pole lug 11 and the second pole lug 12 One of the two pole ears 12 is a positive pole ear, and the other of the first pole ear 11 and the second pole ear 12 is a negative pole ear.
  • the ear 11 is electrically connected, and the second pole 42 is electrically connected to the second ear 12 .
  • the battery unit 100 is mainly composed of the casing 20, the pole core 10, the first pole 41 and the second pole 42, and a chamber 21 is formed in the casing 20, and the chamber 21 has a capacity
  • the pole core 10 is loaded in the chamber 21 .
  • the pole core 10 includes a first tab 11 and a second tab 12. When the first tab 11 is a positive tab, the second tab 12 is a negative tab; when the first tab 11 is a negative tab, the second tab Ear 12 is the positive pole ear.
  • the positive tab is connected and electrically connected to the housing 20 , that is, the positive tab is in physical contact with the housing 20 and is electrically connected.
  • the case 20 is electrically connected to the positive tab, so that the voltage of the case 20 and the positive pole can be made the same, which means that the case 20 is positively charged and the voltage is increased.
  • the shell 20 is an aluminum shell, and the voltage of the aluminum shell is increased. Lithium will not react with the high-voltage aluminum shell when it reacts. If the aluminum shell is not charged or negative pressure occurs, lithium ions will be embedded in the aluminum to form an aluminum-lithium alloy. , causing corrosion to the aluminum shell.
  • the battery unit 100 also includes a first pole 41 and a second pole 42, the first pole 41 is electrically connected to the first pole 11, and the second pole 42 is electrically connected to the second pole 12, which can function as Join role.
  • the positive pole is connected to the positive pole, and the negative pole is connected to the negative pole.
  • the positive pole can be electrically connected to the positive pole through the casing 20 .
  • connecting the positive tab to the casing 20 and electrically connecting the casing 20 can not only realize charging of the casing 20, avoid corrosion of the casing 20, but also simplify the internal structure of the battery. It is beneficial to the diversity of arranging positions of the positive tab, for example, even if the positive tab is disposed on the long axis of the pole core 10 , it can be conveniently electrically connected to the casing 20 .
  • one end of the first tab 11 or the second tab 12 close to the housing 20 includes a plurality of connecting portions 111 distributed at intervals.
  • the pole core 10 of the embodiment of the present application can be mainly composed of the first pole piece, the first pole lug 11, the second pole piece, the second pole lug 12 and the diaphragm, and the first pole piece 11 is provided on the first pole piece.
  • a second tab 12 is provided on the second pole piece, and a diaphragm is provided between the first pole piece and the second pole piece.
  • first tab 11 When the end of the first tab 11 or the second tab 12 close to the housing 20 includes a plurality of connecting parts 111 distributed at intervals, there are many situations as follows, and the first tab 11 is taken as an example for illustration below:
  • the first end of the first tab 11 is connected to the first pole piece, the second end of the first tab 11 has a plurality of connecting parts 111, and there is a separation groove between two adjacent connecting parts 111, that is to say, the second
  • the first end of a tab 11 is an integral structure, and the second end of the first tab 11 is a partition structure.
  • the first tab 11 is divided into a plurality of connecting portions 111 , two adjacent connecting portions 111 are spaced apart, and one end of each connecting portion 111 is directly connected to the first pole piece.
  • the DC resistance (DCR) of the first tab 11 of the present application is smaller, which can reduce the size of the pole core 10.
  • the DCR the DC resistance
  • the second tab 12 adopts a plurality of connecting parts 111 , which can also reduce the DCR, which will not be repeated here.
  • the polarity of the first tab 11 and the second tab 12 are opposite, no matter whether the first tab 11 is a positive tab or a negative tab, the end of the first tab 11 away from the first pole piece can be separated into multiple parts. a connecting portion 111.
  • the DC impedance of the first tab 11 or the second tab 12 can be reduced by using a plurality of connecting parts 111 , thereby reducing the DC impedance of the pole core 10 .
  • the pole core 10 has a major axis and a minor axis
  • the first tab 11 is disposed on the major axis or the minor axis
  • the second pole lug 12 is disposed on the major axis or the minor axis.
  • the pole core 10 is roughly a rectangular piece, with a major axis (ie, the long side of the rectangle) and a minor axis (ie, the short side of the rectangle), wherein the major axis extends along the first direction, and the minor axis extends along the first direction.
  • the second direction extends, and the first direction is substantially perpendicular to the second direction.
  • the positive tab is arranged on the long axis, and the size of the long axis is larger than the size of the short axis.
  • the impedance reduction requirement for the pole core 10 in the first direction is greater than the impedance reduction requirement for the pole core 10 in the second direction. Therefore, when the first tab 11 is arranged on the long axis, the impedance reduction effect for the first direction can be guaranteed; on the other hand, the size of the short axis is limited, especially for blade batteries, the first tab 11 Arranging in the direction of the long axis has the advantage of being easy to install.
  • the negative tab is arranged on the short axis, which is beneficial to the electrical connection between the negative tab and the negative post located on the short axis.
  • the positive cover plate of the prior art flows through the entire aluminum shell to the pole cover plate 40, The DCR at this time includes the resistance of the aluminum case.
  • the current of the positive pole of the present application reaches the positive pole from the side, which can reduce the DCR of the aluminum shell.
  • a plurality of connecting parts 111 are distributed at intervals along the direction of the long axis, which facilitates processing and production.
  • the plurality of connection portions 111 are distributed along the first direction at intervals to simplify the intermediate structure for electrically connecting the plurality of connection portions 111 to the casing 20 at the same time.
  • a plurality of connecting parts 111 are connected in series.
  • the pole core 10 When the pole core 10 is applied to the battery unit 100 , the first tab 11 can be directly or indirectly connected to the housing 20 to realize charging of the housing 20 .
  • the connection parts 111 connected in series it is beneficial to simplify the intermediate structure for realizing the electrical connection between the first tab 11 and the housing 20 .
  • the housing 20 includes a lower part 22 and an upper cover 23, the lower part 22 is defined with a chamber 21 with an opening, and the upper cover 23 is located at the opening for closing the cavity At least a part of the chamber 21, the upper cover 23 is connected to the positive tab by welding.
  • the casing 20 may include a lower part 22 and an upper cover 23 , the lower part 22 is provided with a groove, and a cavity 21 is formed between the lower part 22 and the upper cover 23 .
  • the positive tab can be ultrasonically pre-welded first, and after ultrasonic pre-welding, the positive tab and the upper cover 23 are welded together by laser, and the upper cover 23 is connected to the positive pole.
  • the second end of the positive tab can be directly welded to the casing 20 to realize the direct connection between the positive tab and the casing 20, and the casing 20 is electrified.
  • the first pole 41 is connected to the upper cover 23 to be electrically connected to the positive tab. That is to say, the first pole 41 is a positive pole, and the positive pole ear is electrically connected to the positive pole ear through the casing 20 .
  • the positive tab is a bent part with an opening groove 112
  • the battery unit 100 further includes: a first insulating side plate 30, and the first insulating side plate 30 is arranged in the opening. slot 112 , so that at least a part of the positive tab is located between the first insulating side plate 30 and the upper cover 23 . That is to say, when assembling the battery unit 100, the positive tab can be bent. At this time, the positive tab is formed into a shape similar to " ⁇ " with an open groove 112, or the positive tab is formed into a shape similar to " ⁇ ". , the positive tab cooperates with other parts of the pole core 10 to form an open groove 112 .
  • the first insulating side plate 30 can support the positive tab after the positive tab is folded, that is, by using the first insulating side plate 30 It is possible to prevent the positive tab from being excessively squeezed by the casing 20 , thereby improving the safety performance of the battery unit 100 .
  • the first insulating side plate 30 is connected to the pole core 10 through an adhesive layer. That is to say, the first insulating side plate 30 can be fixed on the pole core 10 by adhesive tape, which can prevent the pole core 10 from moving inside the battery.
  • the battery unit 100 further includes a second insulating side plate 60, and the second insulating side plate 60 is arranged between the casing 20 and the negative tab, so that The casing 20 is insulated from the negative tab to avoid short circuit.
  • the second insulating side plate 60 is connected to the pole core 10 through an adhesive layer. That is to say, the second insulating side plate 60 can be fixed on the pole core 10 by adhesive tape, which can prevent the pole core 10 from moving inside the battery.
  • the battery unit 100 further includes a pole cover 40, the pole cover 40 is arranged on the housing 20, and the pole cover 40 is provided with a first pole 41 and the second pole 42.
  • the pole cover 40 is disposed on the short axis of the pole core 10 , and the pole cover 40 is provided with a positive pole and a negative pole. That is to say, installing the positive pole and the negative pole on the pole cover 40 at the same time is beneficial to processing and production.
  • installing the positive tab on the side, and the positive tab has the connecting portion 111 the positive current will directly reach the pole cover 40 from the side, reducing the DCR of the casing 20 .
  • one of the first pole 41 and the second pole 42 is a positive pole
  • the other of the first pole 41 and the second pole 42 is a negative pole
  • the battery unit 100 It also includes a light cover plate 70, which is located between the pole cover plate 40 and the casing 20, and the light cover plate 70 is electrically connected with the positive pole and the shell 20 respectively, and is insulated from the negative pole.
  • the battery unit 100 further includes an explosion-proof valve cover 50 disposed on the short axis and located on both sides of the long axis with the pole cover 40 .
  • a sealed cavity 21 can be enclosed by the casing 20 , the pole cover 40 and the explosion-proof valve cover 50 by welding.
  • the dimension of the long axis of the pole core 10 is 700mm-800mm, the dimension of the short axis is about 100mm, and the dimension of the connecting part 111 along the long axis is 30mm-50mm.
  • the positive tab is divided into a plurality of connecting parts 111, and the welding seam of each connecting part 111 on the upper cover 23 is maintained at 26mm-46mm, and if the welding seam is too large, it is easy to be welded through.
  • the distance between two adjacent connecting parts 111 along the long axis direction is kept at 80mm-100mm.
  • the number of connecting parts 111 can be adjusted according to the length of the battery unit 100 .
  • the positive tab can be drawn from the side of the longer blade battery, so as to achieve the purpose of optimizing the current path and reducing the internal resistance of the battery unit 100 .
  • the thickness of the upper cover 23 can be maintained at 1mm-2mm, which can reduce the degree of deformation of the upper cover 23 while ensuring the welding strength.
  • the positive tab conducts electricity to the positive post through the upper cover 23 to form a current path.
  • the battery unit 100 according to the present application will be described in detail below in conjunction with specific embodiments.
  • the housing 20 includes a lower part 22 and an upper cover 23 , the shape of the housing 20 is consistent with that of the pole core 10 , and the pole core 10 is a rectangular piece.
  • the pole core 10 has a long axis and a short axis, the long axis extends in the horizontal direction, and the short axis extends in the vertical direction.
  • a positive tab protrudes from the upper side of the pole core 10 , the positive tab has a plurality of connecting portions 111 , and a negative tab protrudes from the left side of the pole core 10 .
  • a pole cover 40 is provided on the left side of the lower part 22 , and an explosion-proof valve cover 50 is provided on the right side of the lower part 22 .
  • a positive pole and a negative pole are provided on the pole cover plate 40 .
  • a light cover 70 is disposed between the pole cover 40 and the housing 20 , and the light cover 70 is insulated from the negative pole.
  • the connecting portion 111 is formed into a bent piece, and the upper surface of the connecting portion 111 is welded to the upper cover 23 .
  • the current channel of the battery can be: positive pole - light cover plate 70 - upper cover 23 - positive pole ear - positive pole piece - negative pole piece - negative pole ear - negative pole.
  • the battery unit 100 has an anti-corrosion effect by making the casing 20 charged and over-current, and by setting multiple There are two connecting parts 111 to reduce the internal resistance of the battery cell 100 .
  • the embodiment of the present application also provides a battery module, which includes the battery unit 100 described in any one of the above embodiments. Since the battery unit 100 according to the embodiment of the present application prolongs the life of the housing 20 , the battery module according to the embodiment of the present application also has the above advantages, which will not be repeated here.
  • the embodiment of the present application also provides a vehicle, which includes the battery module of any one of the above embodiments. Since the battery module according to the embodiment of the present application prolongs the life of the housing 20, the battery according to the embodiment of the present application The module also has the above-mentioned advantages, which will not be repeated here.

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Abstract

一种电池单元、电池模组和车辆。电池单元包括壳体、极芯、第一极柱和第二极柱。该壳体内限定有腔室。该极芯设于该腔室，该极芯包括第一极耳和第二极耳，该第一极耳与该第二极耳中的一个为正极耳，该第一极耳与该第二极耳中的另一个为负极耳，该正极耳与该壳体连接且电连接。该第一极柱与该第一极耳电连接。该第二极柱与该第二极耳电连接。

Description

电池单元、电池模组和车辆
本申请要求于2021年12月21日提交中国专利局、申请号为202123252716.5、发明名称为“电池单元、电池模组和车辆”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，更具体地，涉及一种电池单元、应用该电池单元的电池模组、包括该电池模组的车辆。
背景技术
电池通常包括铝壳和安装在铝壳内部的电芯，铝壳通常不带电，随着电池内部发生反应，锂在反应时会与铝壳反应，锂离子会嵌到铝里面，形成铝锂合金，对于铝壳造成腐蚀，影响电池的使用寿命。
发明内容
根据本申请的一个目的，提供了一种电池单元，包括：壳体，所述壳体内限定有腔室；极芯，所述极芯设于所述腔室，所述极芯包括第一极耳和第二极耳，所述第一极耳与所述第二极耳中的一个为正极耳，所述第一极耳与所述第二极耳中的另一个为负极耳，所述正极耳与所述壳体连接且电连接；第一极柱，所述第一极柱与所述第一极耳电连接；第二极柱，所述第二极柱与所述第二极耳电连接。
在本申请一实施例中，所述第一极耳或所述第二极耳靠近所述壳体的一端包括多个间隔开分布的连接部。
在本申请一实施例中，所述极芯具有长轴和短轴，所述第一极耳设于所述长轴或所述短轴，所述第二极耳设于所述长轴或所述短轴。
在本申请一实施例中，多个所述连接部沿所述长轴的方向间隔开分布。
在本申请一实施例中，多个所述连接部串联连接。
在本申请一实施例中，所述壳体包括：下部，所述下部内限定有具有开口的所述腔室；上盖，所述上盖设于所述开口以用于封闭所述腔室的至少一部分，所述上盖与所述正极耳焊接相连。
在本申请一实施例中，所述第一极柱与所述上盖连接以与所述正极耳电连接。
在本申请一实施例中，所述正极耳为具有开口槽的折弯件，所述电池单元还包括：第一绝缘侧板，所述第一绝缘侧板设于所述开口槽，以使所述正极耳的至少一部分位于所述第一绝缘侧板和所述上盖之间。
在本申请一实施例中，所述第一绝缘侧板与所述极芯通过胶粘层连接。
在本申请一实施例中，所述电池单元还包括：第二绝缘侧板，所述第二绝缘侧板设于所述壳体和所述负极耳之间，以使所述壳体与所述负极耳绝缘设置。
在本申请一实施例中，所述第二绝缘侧板与所述极芯通过胶粘层连接。
在本申请一实施例中，所述第一极柱和所述第二极柱中的一个为正极柱，所述第一极柱和所述第二极柱中的另一个为负极柱。
在本申请一实施例中，所述电池单元还包括：极柱盖板，所述极柱盖板设于所述壳体，所述极柱盖板上设有所述第一极柱和所述第二极柱。
在本申请一实施例中，所述电池单元还包括：光盖板，所述光盖板位于所述极柱盖板和所述壳体之间，所述光盖板分别与所述正极柱和所述壳体电连接，且与所述负极柱绝缘设置。
在本申请一实施例中，所述电池单元还包括：防爆阀盖板，所述防爆阀盖板设于所述短轴且和所述极柱盖板位于所述长轴的两侧。
根据本申请的又一个目的，提供了一种电池模组，包括上述任一实施例所述的电池单元。
根据本申请的又一个目的，提供了一种车辆，包括上述任一实施例所述的电池模组。
通过以下参照附图对本申请的示例性实施例的详细描述，本申请的其它特征及其优点将会更加显而易见。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本申请的实施例，并且连同其说明一起用于解释本申请的原理。
图1是根据本申请的实施例的电池的结构示意图；
图2是根据本申请的实施例的电池的爆炸图；
图3是图2中圈示的A区域的放大图；
图4是根据本申请的实施例的极芯的局部结构示意图；
图5是根据本申请的实施例的极芯的第一极耳与上盖的连接示意图。
附图标记
电池单元100；
极芯10；
第一极耳11；连接部111；开口槽112；
第二极耳12；
壳体20；腔室21；下部22；上盖23；
第一绝缘侧板30；
极柱盖板40；
第一极柱41；第二极柱42；
防爆阀盖板50；
第二绝缘侧板60；
光盖板70。
具体实施方式
现在将参照附图来详细描述本申请的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本申请的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
本申请的一个目的是提供一种电池单元的新技术方案，能够解决现有技术中电池的壳体易于腐蚀的问题。
本申请的又一个目的是提供一种电池模组的新技术方案，包括上述电池单元。
本申请的又一个目的是提供一种车辆的新技术方案，包括上述电池模组。
根据本公开的实施例，将正极耳与壳体连接且电连接，不仅能够实现壳体带电，避免壳体腐蚀，而且能够简化电池内部的结构，并且还有利于正极耳的设置位置的多样性，例如即使将正极耳设置在极芯的长轴上也能够便捷地与壳体电连接。
下面结合附图对根据本申请实施例的电池单元100进行详细说明。
如图1至图5所示，根据本申请实施例的电池单元100包括壳体20、极芯10、第一极柱41和第二极柱42。
具体而言，壳体20内限定有腔室21，极芯10设于腔室21，极芯10包括至少一个第一极耳11和至少一个第二极耳12，第一极耳11与第二极耳12中的一个为正极耳，第一极耳11与第二极耳12中的另一个为负极耳，正极耳与壳体20连接且电连接，第一极柱41与第一极耳11电连接，第二极柱42与第二极耳12电连接。
换言之，根据本申请实施例的电池单元100主要由壳体20、极芯10、第一极柱41和第二极柱42组成，在壳体20内形成有腔室21，腔室21具有容置作用，例如极芯10装载于腔室21内。极芯10包括第一极耳11和第二极耳12，当第一极耳11为正极耳时，第二极耳12为负极耳；当第一极耳11为负极耳时，第二极耳12为正极耳。
正极耳与壳体20连接且电连接，也就是说，正极耳与壳体20物理接触且电连接。通过将正极耳直接与壳体20物理接触，避免了因采用转接件导致的电池内部结构复杂、所需空间大的缺陷。而且还可以在将正极耳设置在极芯10的长轴方向上时，仍然保证壳体20带电、结构紧凑。
其中，将壳体20与正极耳电连接，能够使壳体20和正极的电压一样，相当于壳体20带正电，提高电压。例如壳体20为铝壳，铝壳的电压提高，锂在反应时不会与高电压的铝壳反应，如果铝壳不带电或者出现负压，锂离子会嵌到铝里面，形成铝锂合金，对于铝壳造成腐蚀。
此外，电池单元100还包括第一极柱41和第二极柱42，第一极柱41与第一极耳11电连接，第二极柱42与第二极耳12电连接，能够起到联接作用。其中，与正极耳连接的为正极柱，与负极耳连接的为负极柱，正极柱可以通过壳体20与正极耳电连接。
由此，根据本申请实施例的电池单元100，将正极耳与壳体20连接且电连接，不仅能够实现壳体20带电，避免壳体20腐蚀，而且能够简化电池内部的结构，并且还有利于正极耳的设置位置的多样性，例如即使将正极耳设置在极芯10的长轴上也能够便捷地与壳体20电连接。
根据本申请的实施例，第一极耳11或第二极耳12靠近壳体20的一端包括多个间隔开分布的连接部111。
其中，本申请实施例的极芯10可以主要由第一极片、第一极耳11、第二极片、第二极耳12和隔膜组成，在第一极片上设有第一极耳11，在第二极片上设有第二极耳12，在第一极片和第二极片之间设有隔膜。
在第一极耳11或第二极耳12靠近壳体20的一端包括多个间隔开分布的连接部111时包括以下多种情况，下面以第一极耳11为例进行说明：
情况一
第一极耳11的第一端与第一极片连接，第一极耳11的第二端具有多个连接部111，相邻两个连接部111之间具有分隔槽，也就是说，第一极耳11的第一端为一个整体结构，第一极耳11的第二端为分隔结构。
情况二
第一极耳11被分隔为多个连接部111，相邻两个连接部111之间间隔开分布，每个连接部111的一端直接与第一极片连接。
无论是情况一还是情况二，相对于现有技术中的一整片的第一极耳11而言，本申请的第一极耳11的直流阻抗(DCR)更小，能够减小极芯10的DCR。同样的，第二极耳12采用多个连接部111，也能够降低DCR，在此不作赘述。此外，第一极耳11与第二极耳12的极性相反，无论第一极耳11是正极耳还是负极耳，均可以将第一极耳11远离第一极片的端部分隔为多个连接部111。
在本实施例中，通过采用多个连接部111能够降低第一极耳11或第二极耳12的直流阻抗，从而降低极芯10的直流阻抗。
根据本申请的实施例，极芯10具有长轴和短轴，第一极耳11设于长轴或短轴，第二极耳12设于长轴或短轴。在第一极耳11设置在长轴时，第二极耳12可以设置在长轴或者短轴；在第一极耳11设置在短轴时，第二极耳12可以设置在长轴或者短轴。如图4所示，例如，极芯10大致为类矩形件，具有长轴(即矩形的长边)和短轴(即矩形的短边)，其中长轴沿第一方向延伸，短轴沿第二方向延伸，第一方向与第二方向大体垂直设置。
进一步地，正极耳设置在长轴，长轴的尺寸大于短轴的尺寸，一方面，对于第一方向的极芯10的降阻抗需求会大于对于第二方向的极芯10的降阻抗需求，因此在将第一极耳11设置在长轴上时，能够保证对于第一方向的降阻抗效果；又一方面，短轴的尺寸有限，特别是对于刀片电池而言，将第一极耳11设置在长轴方向具有便于设置的优点。也就是说，通过在极芯10的长度方向的侧面设计有若干个连接部111，有利于整个极芯10的电阻的降低，特别是对于长度较长的刀片电池。更进一步地，负极耳设置在短轴，有利于负极耳与位于短轴的负极柱的电连接。相对于现有技术中的将正极耳和负极耳分别设置在两个相对设置的短轴上的方案而言，现有技术的正极盖板通过整个铝壳过流来到极柱盖板40，此时的DCR包括了铝壳的电阻。而本申请的正极的电流从侧面到达正极柱，能够减少铝壳的DCR。
在本申请的一些具体实施方式中，如图4和图5所示，多个连接部111沿长轴的方向间隔开分布，有利于加工生产。在极芯10应用于电池单元100时，将多个连接部111沿第一方向间隔开分布，能够简化将多个连接部111同时与壳体20电连接的中间结构。
根据本申请的实施例，多个连接部111串联连接，在将极芯10应用于电池单元100中时，可以将第一极耳11直接或者间接与壳体20连接，实现壳体20带电。在本实施例中，通过采用串联连接的多个连接部111，有利于简化用于实现第一极耳11与壳体20电连接的中间结构。
根据本申请的实施例，如图2和图3所示，壳体20包括下部22和上盖23，下部22内 限定有具有开口的腔室21，上盖23设于开口以用于封闭腔室21的至少一部分，上盖23与正极耳焊接相连。
也就是说，壳体20可以包括下部22和上盖23，下部22设有槽，下部22和上盖23之间配合形成有腔室21。如图5所示，其中，正极耳可以先进行超声预焊，在超声预焊后正极耳与上盖23通过激光焊接在一起，上盖23与正极柱连通。正极耳的第二端可以直接与壳体20焊接，实现正极耳与壳体20的直接连接，且壳体20带电。
根据本申请的实施例，第一极柱41与上盖23连接以与正极耳电连接。也就是说，第一极柱41为正极柱，正极耳通过壳体20与正极耳电连接。
根据本申请的实施例，如图2和图3所示，正极耳为具有开口槽112的折弯件，电池单元100还包括：第一绝缘侧板30，第一绝缘侧板30设于开口槽112，以使正极耳的至少一部分位于第一绝缘侧板30和上盖23之间。也就是说，在组装电池单元100时，可将正极耳折弯，此时正极耳形成为类“匚”字形，“匚”字形具有开口槽112，或者，正极耳形成为类“乛”字形，正极耳与极芯10的其他部件配合形成有开口槽112。
在本实施例中，通过在正极耳中设置有第一绝缘侧板30，在正极耳折叠后第一绝缘侧板30对正极耳有支撑作用，也就是说，通过采用第一绝缘侧板30能够防止正极耳受到壳体20的过度挤压，从而提高电池单元100的安全性能。
根据本申请的实施例，第一绝缘侧板30与极芯10通过胶粘层连接。也就是说，第一绝缘侧板30可以通过胶带固定在极芯10上，能够防止极芯10在电池内部窜动。
在本申请的一些具体实施方式中，如图2和图3所示，电池单元100还包括第二绝缘侧板60，第二绝缘侧板60设于壳体20和负极耳之间，以使壳体20与负极耳绝缘设置，能够避免短路。
根据本申请的实施例，第二绝缘侧板60与极芯10通过胶粘层连接。也就是说，第二绝缘侧板60可以通过胶带固定在极芯10上，能够防止极芯10在电池内部窜动。
根据本申请的实施例，如图2和图3所示，电池单元100还包括极柱盖板40，极柱盖板40设于壳体20，极柱盖板40上设有第一极柱41和第二极柱42。
例如，极柱盖板40设于极芯10的短轴，极柱盖板40上设有正极柱和负极柱。也就是说，将正极柱和负极柱同时安装在极柱盖板40上，有利于加工生产。此外，通过在侧面设置正极耳，且正极耳具有连接部111，正极的电流将会从侧面直接到达极柱盖板40，减少了壳体20的DCR。
在本申请的一些具体实施方式中，第一极柱41和第二极柱42中的一个为正极柱，第一极柱41和第二极柱42中的另一个为负极柱，电池单元100还包括光盖板70，光盖板70位于极柱盖板40和壳体20之间，光盖板70分别与正极柱和壳体20电连接，且与负极柱绝缘设置。
根据本申请的实施例，如图2所示，电池单元100还包括防爆阀盖板50，防爆阀盖板50设于短轴且和极柱盖板40位于长轴的两侧。其中，通过壳体20、极柱盖板40和防爆阀盖板50可以通过焊接围合有密闭的腔室21。
根据本申请的实施例，极芯10的长轴方向的尺寸为700mm-800mm，短轴的尺寸为100mm左右，连接部111沿长轴方向的尺寸为30mm-50mm。正极耳分为多个连接部111，每个连接部111焊接在上盖23上的焊缝保持在26mm-46mm，焊缝如果太大容易焊穿。沿长轴方向的相邻设置的两个连接部111之间的间距保持在80mm-100mm。连接部111的数量可以根据电池单元100长度进行调整。通过采用上述设计，能够对较长的刀片电池的侧面引出正极耳， 可以达到优化电流路径，减小电池单元100的内阻的目的。
在本申请的一些具体实施方式中，上盖23的厚度可以保持在1mm-2mm，此厚度可以在保证焊接强度的同时，降低上盖23的形变程度。正极耳通过上盖23导电至正极柱上，形成电流通路。
下面结合具体实施例对根据本申请的电池单元100进行详细说明。
壳体20包括下部22和上盖23，壳体20的形状与极芯10的形状一致，极芯10为矩形件。极芯10具有长轴和短轴，长轴沿水平方向延伸，短轴沿上下方向延伸。在极芯10的上侧面伸出有正极耳，正极耳具有多个连接部111，在极芯10的左侧面伸出有负极耳。在下部22的左侧面设有极柱盖板40，在下部22的右侧面设有防爆阀盖板50。在极柱盖板40上设有正极柱和负极柱。极柱盖板40和壳体20之间设置有光盖板70，光盖板70与负极柱绝缘。
在电池装配完成后，连接部111形成为折弯件，连接部111的上表面与上盖23焊接。电池的电流通道可为：正极柱-光盖板70-上盖23-正极耳-正极片-负极片-负极耳-负极柱。
总而言之，根据本申请实施例的电池单元100，通过使壳体20带电且过流，使电池单元100具有防腐蚀的效果，通过将在第一极耳11和/或第二极耳12设置多个连接部111，起到减小电池单元100的内阻的效果。
本申请实施例还提供了一种电池模组，该电池模组包括上述任一实施例所述的电池单元100。由于根据本申请实施例的电池单元100延长了壳体20的寿命，因此根据本申请实施例的电池模组也具有上述优点，在此不作赘述。
本申请实施例还提供了一种车辆，该车辆包括上述任一实施例的电池模组，由于根据本申请实施例的电池模组延长了壳体20的寿命，因此根据本申请实施例的电池模组也具有上述优点，在此不作赘述。
虽然已经通过例子对本申请的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本申请的范围。本领域的技术人员应该理解，可在不脱离本申请的范围和精神的情况下，对以上实施例进行修改。本申请的范围由所附权利要求来限定。

Claims (17)

  1. 一种电池单元(100)，其特征在于，包括：
    壳体(20)，所述壳体(20)内限定有腔室(21)；
    极芯(10)，所述极芯(10)设于所述腔室(21)，所述极芯(10)包括第一极耳(11)和第二极耳(12)，所述第一极耳(11)与所述第二极耳(12)中的一个为正极耳，所述第一极耳(11)与所述第二极耳(12)中的另一个为负极耳，所述正极耳与所述壳体(20)连接且电连接；
    第一极柱(41)，所述第一极柱(41)与所述第一极耳(11)电连接；
    第二极柱(42)，所述第二极柱(42)与所述第二极耳(12)电连接。
  2. 根据权利要求1所述的电池单元(100)，其特征在于，所述第一极耳(11)或所述第二极耳(12)靠近所述壳体(20)的一端包括多个间隔开分布的连接部(111)。
  3. 根据权利要求1或2所述的电池单元(100)，其特征在于，所述极芯(10)具有长轴和短轴，所述第一极耳(11)设于所述长轴或所述短轴，所述第二极耳(12)设于所述长轴或所述短轴。
  4. 根据权利要求1-3中任一项所述的电池单元(100)，其特征在于，多个所述连接部(111)沿所述长轴的方向间隔开分布。
  5. 根据权利要求1-4中任一项所述的电池单元(100)，其特征在于，多个所述连接部(111)串联连接。
  6. 根据权利要求1-5中任一项所述的电池单元(100)，其特征在于，所述壳体(20)包括：
    下部(22)，所述下部(22)内限定有具有开口的所述腔室(21)；
    上盖(23)，所述上盖(23)设于所述开口以用于封闭所述腔室(21)的至少一部分，所述上盖(23)与所述正极耳焊接相连。
  7. 根据权利要求1-6中任一项所述的电池单元(100)，其特征在于，所述第一极柱(41)与所述上盖(23)连接以与所述正极耳电连接。
  8. 根据权利要求1-7中任一项所述的电池单元(100)，其特征在于，所述正极耳为具有开口槽(112)的折弯件，所述电池单元(100)还包括：
    第一绝缘侧板(30)，所述第一绝缘侧板(30)设于所述开口槽(112)，以使所述正极耳的至少一部分位于所述第一绝缘侧板(30)和所述上盖(23)之间。
  9. 根据权利要求1-8中任一项所述的电池单元(100)，其特征在于，所述第一绝缘侧板(30)与所述极芯(10)通过胶粘层连接。
  10. 根据权利要求1-9中任一项所述的电池单元(100)，其特征在于，还包括：
    第二绝缘侧板(60)，所述第二绝缘侧板(60)设于所述壳体(20)和所述负极耳之间，以使所述壳体(20)与所述负极耳绝缘设置。
  11. 根据权利要求1-10中任一项所述的电池单元(100)，其特征在于，所述第二绝缘侧板(60)与所述极芯(10)通过胶粘层连接。
  12. 根据权利要求1-11中任一项所述的电池单元(100)，其特征在于，所述第一极柱(41)和所述第二极柱(42)中的一个为正极柱，所述第一极柱(41)和所述第二极柱(42)中的 另一个为负极柱。
  13. 根据权利要求1-12中任一项所述的电池单元(100)，其特征在于，还包括：
    极柱盖板(40)，所述极柱盖板(40)设于所述壳体(20)，所述极柱盖板(40)上设有所述第一极柱(41)和所述第二极柱(42)。
  14. 根据权利要求1-13中任一项所述的电池单元(100)，其特征在于，还包括：
    光盖板(70)，所述光盖板(70)位于所述极柱盖板(40)和所述壳体(20)之间，所述光盖板(70)分别与所述正极柱和所述壳体(20)电连接，且与所述负极柱绝缘设置。
  15. 根据权利要求1-14中任一项所述的电池单元(100)，其特征在于，还包括：
    防爆阀盖板(50)，所述防爆阀盖板(50)设于所述短轴且和极柱盖板(40)位于长轴的两侧。
  16. 一种电池模组，其特征在于，包括权利要求1-15中任一项所述的电池单元(100)。
  17. 一种车辆，其特征在于，包括权利要求16所述的电池模组。
PCT/CN2022/125892 2021-12-21 2022-10-18 电池单元、电池模组和车辆 WO2023116149A1 (zh)

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