WO2025035708A1 - 电池单体、电池及用电装置 - Google Patents

电池单体、电池及用电装置 Download PDF

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Publication number
WO2025035708A1
WO2025035708A1 PCT/CN2024/073714 CN2024073714W WO2025035708A1 WO 2025035708 A1 WO2025035708 A1 WO 2025035708A1 CN 2024073714 W CN2024073714 W CN 2024073714W WO 2025035708 A1 WO2025035708 A1 WO 2025035708A1
Authority
WO
WIPO (PCT)
Prior art keywords
adapter
insulating member
battery cell
electrode terminal
pole
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2024/073714
Other languages
English (en)
French (fr)
Inventor
田亚西
唐代春
喻鸿钢
金海族
杨瑞
魏曦晨
李志尧
姚远达
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
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 Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to EP24853125.3A priority Critical patent/EP4664666A1/en
Priority to CN202490000005.1U priority patent/CN222690778U/zh
Publication of WO2025035708A1 publication Critical patent/WO2025035708A1/zh
Priority to US19/300,335 priority patent/US20250372845A1/en
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery cell, a battery and an electrical device.
  • heat will be generated when overcurrent occurs in the adapter, when the adapter and the tab are welded, or when the adapter and the electrode terminal are welded. This heat will be conducted to the insulating part, and there is a risk that the insulating part will melt, causing the insulating performance of the insulating part to fail.
  • the purpose of the embodiments of the present application is to provide a battery cell, a battery and an electrical device, which can improve the technical problem that the insulating parts may be melted and cause the insulation performance to fail.
  • An electrode assembly is disposed in the housing
  • An electrode terminal is disposed on the housing
  • the adapter is disposed in the housing and is conductively connected to the electrode assembly and the electrode terminal;
  • the insulating component is arranged in the shell and at least partly located between the shell and the adapter. At least part of the insulating component is spaced apart from the adapter.
  • the battery cell provided in the embodiment of the present application can slow down the heat conduction between the adapter and the insulating part by distributing at least part of the insulating part at intervals with the adapter, thereby improving the problem of heat from the adapter being conducted to the insulating part causing the insulation performance of the insulating part to fail, so that the insulating part can achieve a good insulation effect between the adapter and the outer shell.
  • the adapter is disposed at the end of the electrode assembly along the first direction;
  • the insulating member includes a main body portion, which is located between the adapter and the shell along the first direction and is spaced apart from the adapter along the first direction.
  • Such an arrangement enables the insulating member to achieve insulation between the housing and the adapter, and the main body of the insulating member can also be spaced apart from the adapter to slow down the conduction of heat between the adapter and the main body, thereby improving the problem of insulation failure of the main body.
  • the insulating member further includes a first boss, which is disposed on a side of the main body along the first direction facing the electrode assembly; the adapter and the first boss are spaced apart along the second direction, and the second direction intersects the first direction.
  • the adapter is not only spaced apart from the main body of the insulating member, but also spaced apart from the first boss of the insulating member. This can better slow down the conduction of heat between the adapter and the insulating member, so as to improve the problem of the heat of the adapter causing the insulation performance of the insulating member to fail, specifically including the insulation performance failure of the main body of the insulating member and the insulation performance failure of the first boss.
  • a liquid injection hole is opened on the wall of the shell along the first direction
  • the insulating part also includes a protrusion, which is arranged on the side of the main body along the first direction facing the electrode assembly; the protrusion is connected to the liquid injection hole and is connected to the inside of the shell; the adapter and the protrusion are spaced apart along the second direction, and the second direction intersects with the first direction.
  • the adapter is not only spaced apart from the main body of the insulating member, but also spaced apart from the main body of the insulating member.
  • the convex columns are distributed at intervals, which can preferably slow down the conduction of heat between the adapter and the insulating member, thereby improving the problem that the heat of the adapter causes the insulation performance of the insulating member to fail.
  • a gap formed between at least a portion of the insulating member and the transition member is greater than 0.1 mm.
  • Such an arrangement allows a larger gap to be provided between at least part of the insulating member and the adapter, thereby slowing down the conduction of heat between the adapter and the insulating member, and further facilitating improvement of the problem of insulation performance failure of the insulating member due to heat from the adapter.
  • the electrode assembly is welded to the adapter.
  • the adapter is used to be spaced apart from the insulating member at the position of the electrode assembly.
  • the speed at which the heat generated by the electrode assembly and the adapter during welding is conducted to the insulating member can be slowed down, thereby improving the problem of insulation failure of the insulating member.
  • the adapter is provided with a positioning hole, and the electrode terminal is inserted into the positioning hole.
  • the electrode terminal By inserting the electrode terminal into the positioning hole, it is convenient to position the electrode terminal on the battery cell and to realize the conductive connection between the electrode terminal and the adapter.
  • the electrode assembly is welded to the adapter, and the weld marks formed by welding the electrode assembly to the adapter are spaced apart from the positioning holes.
  • Such a configuration can improve the problem of solder used in the welding process of the tab and the adapter flowing into the positioning hole, and further improve the problem that the welding process of the tab and the adapter will interfere with the positioning function of the positioning hole on the electrode terminal, thereby facilitating the assembly of the battery cell.
  • the electrode assembly includes a main body and a pole ear provided on the main body; the pole ear includes a plurality of sub-pole ears, the plurality of sub-pole ears are welded to form a first weld mark, at least a portion of the first weld mark is welded to the adapter to form a second weld mark, and the second weld mark is spaced apart from the positioning hole.
  • the first weld mark is formed by welding multiple sub-tabs of the tab, which facilitates the welding operation of the tab and the adapter.
  • a plurality of sub-tabs are welded and welded with the adapter to form a first weld mark, and the first weld mark is spaced apart from the positioning hole.
  • the tabs are also welded to the adapter, which increases the number of welding times between the tabs and the adapter, and can improve the conduction strength between the adapter and the tabs.
  • the first weld marks are also spaced apart from the positioning holes, so that during the welding process of the sub-tabs and the adapter, the solder is not easy to flow into the positioning holes, thereby improving the problem that the welding process of the tabs and the adapter will interfere with the positioning function of the positioning holes on the electrode terminals, thereby facilitating the assembly of the battery cells.
  • the minimum distance between the weld mark formed by welding the electrode assembly and the adapter and the positioning hole is 0.2 to 6 mm.
  • Such a configuration allows the minimum spacing between the weld marks formed by welding the electrode assembly and the adapter and the positioning hole to have a suitable range, which can improve the problem of solder flowing into the positioning hole during the welding process of the electrode assembly and the adapter, thereby improving the problem of the welding process of the electrode assembly and the adapter interfering with the positioning operation of the positioning hole on the electrode terminal.
  • the weld marks, positioning holes, etc. formed by welding the electrode assembly and the adapter can be compactly distributed on the adapter, thereby reducing the size of the adapter.
  • the electrode assembly includes a main body and a tab disposed on the main body; the tab includes a first tab, the electrode terminal includes a first electrode terminal, the adapter includes a first adapter, the insulating member includes a first insulating member; the first adapter The first insulating member is conductively connected to the first electrode tab and the first electrode terminal, at least a portion of the first insulating member is located between the first adapter and the housing, and at least a portion of the first insulating member is spaced apart from the first adapter;
  • the first adapter is conductively connected to the first electrode tab to form a plurality of first connection portions distributed at intervals.
  • the current distribution between the first adapter and the first pole lug can be more uniform, so that the overcurrent temperature of the first adapter can be reduced to improve the problem of heat concentration caused by current concentration in the first adapter, and further improve the problem of insulation performance failure of the insulating member caused by excessive heat of the first adapter.
  • a larger overcurrent capacity can be provided between the first adapter and the first pole lug.
  • the housing is provided with a liquid injection hole, and the plurality of first connection portions are provided on a side of the first electrode terminal away from the liquid injection hole.
  • the first connecting portion is located at a side of the first electrode terminal away from the injection hole, the first adapter can be arranged as far away from the injection hole as possible, so that the first adapter will not interfere with the operation of the injection hole.
  • a first wall is provided on one side of the housing along the first direction, and the first electrode terminal and the injection hole are spaced apart from each other on the first wall.
  • the first electrode terminal and the liquid injection hole are arranged on the same wall of the shell along the first direction, which is beneficial to improving the compactness of the structure of the battery cell.
  • the first electrode tab includes a plurality of first sub-electrode tabs, the plurality of first sub-electrode tabs are connected to form a second connection portion, and at least a portion of the second connection portion is conductively connected to the first adapter to form the first connection portion.
  • Such an arrangement enables the first electrode tab to be better conductively connected to the first adapter.
  • the pole lug also includes a second pole lug
  • the electrode terminal also includes a second electrode terminal
  • the adapter also includes a second adapter
  • the insulating member also includes a second insulating member; the second adapter is conductively connected to the second pole lug and the second electrode terminal, at least a portion of the second insulating member is located between the second adapter and the outer shell, and at least a portion of the second insulating member is spaced apart from the second adapter.
  • Such an arrangement enables an insulating member to be provided between each adapter and the housing, thereby achieving insulation between each adapter and the housing.
  • the pole lug also includes a second pole lug
  • the electrode terminal also includes a second electrode terminal
  • the adapter also includes a second adapter
  • the second adapter is conductively connected to the second pole lug and the second electrode terminal;
  • the second pole lug is conductively connected to the second adapter to form a plurality of spaced third connection portions.
  • the current distribution between the second adapter and the second tab can be more uniform, so that the overcurrent temperature of the second adapter can be reduced, so as to improve the problem of heat concentration caused by current concentration in the second adapter, and further improve the problem of insulation performance failure of the insulating member caused by excessive heat of the second adapter.
  • the second adapter can have a larger overcurrent capacity between the second tab.
  • At least a portion of the second electrode terminal is located between two third connection portions.
  • Such an arrangement allows the multiple positions of the second adapter for connecting to the second pole ear to be more dispersed, which can make the current inside the battery cell more uniform, thereby reducing the overcurrent temperature of the second adapter and further reducing the risk of the second adapter causing the insulation performance of the insulating member to fail.
  • the second electrode tab includes a plurality of second sub-electrode tabs, the plurality of second sub-electrode tabs are connected to form a fourth connection portion, and at least a portion of the fourth connection portion is conductively connected to the second adapter to form a third connection portion.
  • Such an arrangement enables the second electrode tab to be better conductively connected to the second adapter.
  • a plurality of second sub-electrode tabs are connected to form a plurality of fourth connection portions that are spaced apart from each other, and at least a portion of each fourth connection portion is conductively connected to the second adapter to form a corresponding third connection portion.
  • a plurality of spaced fourth connection portions are formed by connecting the second sub-pole ears, so that each fourth connection portion is conductively connected to the second adapter to form a corresponding third connection portion, so that the current between the second adapter and the second pole ear can be distributed more evenly, thereby reducing the overcurrent temperature of the second adapter, thereby reducing the risk of the second adapter causing the insulation performance of the insulating component to fail.
  • an embodiment of the present application provides a battery, including a battery cell.
  • the battery provided in the embodiment of the present application adopts the battery monomer involved above, and at least part of the insulating member is
  • the spaced distribution arrangement with the adapter can slow down the heat conduction between the adapter and the insulating part, and further improve the problem of heat from the adapter being conducted to the insulating part causing the insulating performance of the insulating part to fail.
  • the insulating part can achieve a good insulation effect between the adapter and the outer shell, making the battery have higher reliability.
  • an embodiment of the present application provides an electrical device, including a battery cell or a battery.
  • the electrical device provided in the embodiment of the present application adopts the battery cell or battery involved above.
  • the heat conduction between the adapter and the insulating part can be slowed down, and the problem of heat on the adapter being conducted to the insulating part causing the insulation performance of the insulating part to fail can be improved.
  • the insulating part can achieve a good insulation effect between the adapter and the casing, so that the battery cell or battery has higher reliability.
  • FIG1 is a schematic diagram of a vehicle provided in some embodiments of the present application.
  • FIG2 is an exploded schematic diagram of a battery provided in some embodiments of the present application.
  • FIG3 is a cross-sectional view of a battery cell provided in some embodiments of the present application.
  • FIG4 is an enlarged view of point A in FIG3 ;
  • FIG5 is a schematic diagram of the matching of the end cover and the insulating member of the battery cell provided in some embodiments of the present application;
  • FIG6 is a top view of the first adapter and the end cover of the battery cell provided in FIG3 ;
  • FIG. 7 is a schematic diagram of a second adapter of the battery cell provided in FIG. 3 .
  • the reference numerals in the figure are: 1000-vehicle; 100-battery; 200-controller; 300-motor; 10-battery cell; 20-box; 21-first part; 22-second part; 11-electrode assembly; 111-main body; 112-ear; 112a-first ear; 1121a-first connection part; 1122a-second connection part; 112b-second ear; 1121b-third connection part; 1122b-fourth connection part; 12-housing; 1201-injection hole; 121-housing; 122-end cover; 122a-first wall; 122b-second wall; 13-electrode terminal; 13a-first electrode terminal; 13b-third Two electrode terminals; 14-adapter; 1401-positioning hole; 14a-first adaptor; 14b-second adaptor; 15-insulating member; 1501-through hole; 15a-first insulating member; 15b-second insulating member; 151-main body; 152-first boss;
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include one or more of the features.
  • plural means more than two, and unless otherwise clearly and specifically defined, “more than two” includes two. Accordingly, “multiple groups” means more than two groups, including two groups.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • installed can be a fixed connection, a detachable connection, or an integral connection
  • it can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • a battery cell may generally include a housing, an electrode assembly, an electrode terminal and an adapter.
  • the electrode assembly and the adapter are both arranged in the internal environment defined by the housing, and the electrode terminal is arranged in the housing.
  • the adapter is welded to the electrode lug and the electrode terminal of the electrode assembly respectively to achieve conduction between the electrode assembly and the electrode terminal. In this way, the adapter can achieve flow between the electrode assembly and the electrode terminal.
  • the battery cell further comprises an insulating member disposed in the outer shell, and the insulating member can be used at least to achieve insulation between the adapter and the outer shell, and can also be used to achieve insulation between the electrode assembly and the outer shell.
  • the adapter generates heat when there is an overcurrent, and the heat generated by the adapter will be transferred to the insulating part. Therefore, when the battery cell is used for a long time, there is a risk that the insulating part will be melted and the insulating performance of the insulating part will fail. In particular, when a short circuit occurs in the battery cell, the current inside the adapter increases sharply, and the energy is released sharply, so the temperature inside the adapter increases sharply, which can easily transfer the heat to the insulating part, causing the insulating performance of the insulating part to fail, and then causing a short circuit inside the battery cell.
  • the heat on the transition piece will be transferred to the insulating piece, so that the insulating piece is at risk of being melted by the transition piece, resulting in failure of the insulating performance.
  • the embodiments of the present application provide a battery cell, a battery and an electrical device.
  • the heat conduction between the adapter and the insulating part can be slowed down, thereby improving the problem of heat on the adapter being conducted to the insulating part causing the insulation performance of the insulating part to fail.
  • the insulating part can achieve a good insulation effect between the adapter and the outer casing.
  • the battery cells involved in the embodiments of the present application can be used in electrical devices that use battery cells or batteries as power sources, and the batteries involved in the embodiments of the present application can be used in electrical devices that use batteries as power sources.
  • the electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.
  • the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.
  • the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.
  • the vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.
  • the battery cells and batteries involved in the embodiments of the present application may also be used in energy storage devices, wherein the energy storage device may be an energy storage container, an energy storage cabinet, and the like.
  • the battery involved in the embodiment of the present application can be a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar component.
  • Hybrid connection means that multiple battery cells are connected in both series and in parallel.
  • the battery may be a battery module.
  • the multiple battery cells are arranged and fixed to form a battery module.
  • the multiple battery cells may be fixed to form a battery module by rolling a strip or the like.
  • multiple battery cells may also be fixed by end plates, side plates, etc. to form a battery module.
  • the battery may be a battery pack, which may include a box and a battery cell.
  • the battery cell may be directly accommodated in the box.
  • the battery cell may also be formed into a battery module first and then accommodated in the box.
  • FIG. 1 is a schematic diagram of a vehicle 1000 provided in some embodiments of the present application.
  • the above-mentioned battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000.
  • the battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source for the vehicle 1000.
  • the vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.
  • the battery 100 can be used not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is an exploded view of a battery 100 provided in some embodiments of the present application.
  • the battery 100 includes a box 20 and a plurality of battery cells 10.
  • the box 20 is a structure having a storage space inside, and the box 20 can adopt a variety of structures.
  • the box 20 can include a first part 21 and a second part 22, which cover each other and jointly define the above-mentioned storage space.
  • the first part 21 can be a hollow structure with an opening at one end
  • the second part 22 is a plate-like structure
  • the second part 22 covers the opening side of the first part 21, so that the first part 21 and the second part 22 jointly define the above-mentioned storage space
  • the first part 21 and the second part 22 can both be hollow structures with an opening at one end, as shown in FIG. 2, the opening side of the first part 21 covers the opening side of the second part 22, so that the first part 21 and the second part 22 jointly define the above-mentioned storage space.
  • the box 20 composed of the first part 21 and the second part 22 can be in a variety of shapes, such as a cylinder, a cuboid, etc.
  • multiple battery cells 10 can be connected in series, in parallel or in a mixed connection to form a whole, and then the whole formed by the multiple battery cells 10 is directly accommodated in the above-mentioned accommodation space of the box body 20, as shown in Figure 2.
  • Multiple battery cells 10 can also be connected in series, in parallel or in a mixed connection first, and arranged and fixed to form multiple battery modules, and multiple battery modules are then connected in series, in parallel or in a mixed connection to form a whole, and accommodated in the above-mentioned accommodation space of the box body 20.
  • the box 20 of the battery 100 when the battery 100 is applied to the vehicle 1000, the box 20 of the battery 100 may be used as a part of the chassis structure of the vehicle 1000.
  • part of the box 20 may become at least a part of the chassis of the vehicle 1000, or part of the box 20 may become at least a part of the cross beam and the longitudinal beam of the vehicle 1000.
  • the battery cell 10 refers to the smallest unit for storing and outputting electric energy.
  • the battery cell 10 may be a secondary battery or a primary battery.
  • the battery cell 10 may be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery.
  • the battery cell 10 may be cylindrical, flat, rectangular, or in other shapes.
  • FIG3 is a cross-sectional view of a battery cell 10 provided in some embodiments of the present application.
  • the battery cell 10 may include an electrode assembly 11 and a housing 12 .
  • the electrode assembly 11 is a component in the battery cell 10 where electrochemical reactions occur.
  • the electrode assembly 11 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is provided between the positive and negative electrode sheets.
  • the parts of the positive and negative electrode sheets with active materials constitute the main body 111 of the electrode assembly 11, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 112.
  • the tab 112 of the positive electrode sheet is the positive electrode tab
  • the tab 112 of the negative electrode sheet is the negative electrode tab.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body 111 or respectively at opposite ends of the main body 111.
  • the number of the electrode assembly 11 may be one or more.
  • the electrode assembly 11 may also be referred to as a bare cell, a wound body, a laminated body, etc.
  • the battery cell 10 may further include an electrolyte, which plays a role in conducting ions between the positive electrode plate and the negative electrode plate.
  • the electrolyte involved in the embodiments of the present application may be liquid, gel or solid.
  • the housing 12 may include a shell 121 and an end cap 122.
  • the shell 121 and the end cap 122 are components for jointly defining an internal environment of the battery cell 10.
  • the internal environment defined by the shell 121 and the end cap 122 is used to accommodate the electrode assembly 11 and the Electrolyte.
  • the shell 121 and the end cap 122 may be independent components.
  • the shell 121 has an opening, and the end cap 122 is covered at the opening of the shell 121 to define the internal environment of the battery cell 10 together with the shell 121, and isolate the internal environment of the battery cell 10 from the external environment.
  • the shell 121 and the end cap 122 may also be an integrated structure.
  • a common connection surface may be formed between the end cap 122 and the shell 121 before the electrode assembly 11 is placed in the shell.
  • the end cap 122 covers the shell 121.
  • the number of the end cap 122 may be one.
  • the number of the end cap 122 may also be two, and the two end caps 122 are respectively disposed at two opposite ends of the housing 121 .
  • the shell 121 may be cylindrical, square, or other shapes, which may be determined according to the specific shape and size of the electrode assembly 11.
  • the shell 121 and the end cap 122 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, or the like.
  • the battery cell 10 may further include an electrode terminal 13.
  • the electrode terminal 13 refers to a component with conductive properties, and the electrode terminal 13 serves as a current transmission end of the battery cell 10 for transmitting current.
  • the electrode terminal 13 may be, but is not limited to, a pole.
  • the electrode terminal 13 is connected to the tab 112. Specifically, the electrode terminal 13 can be directly connected to the tab 112, such as by welding.
  • An adapter 14 can also be provided between the electrode terminal 13 and the tab 112, and the adapter 14 realizes the connection between the electrode terminal 13 and the tab 112 so as to enable current flow, thereby indirectly realizing the connection between the electrode terminal 13 and the tab 112.
  • the adapter 14 refers to a metal structure with conductive properties, such as but not limited to a copper busbar.
  • the adapter 14 is disposed in the housing 12 .
  • Electrode terminals 13 There are two electrode terminals 13 , which are a positive electrode terminal and a negative electrode terminal respectively.
  • the positive electrode terminal is conductively connected to the positive electrode tab, and the negative electrode terminal is conductively connected to the negative electrode tab.
  • the electrode terminal 13 is disposed on the housing 12. Specifically, the electrode terminal 13 can be disposed on the shell 121 of the housing 12, or on the end cap 122 of the housing 12.
  • the positive electrode terminal and the negative electrode terminal can be disposed on the shell 121 at the same time; or, as shown in FIG3 , the positive electrode terminal and the negative electrode terminal are disposed on the end cap 122 at the same time; or, one of the positive electrode terminal and the negative electrode terminal is disposed on the shell 121, and the other is disposed on the end cap 122.
  • the positive electrode terminal and the negative electrode terminal may be disposed at the same end of the housing 12 ; or, as shown in FIG. 3 , the positive electrode terminal and the negative electrode terminal may be disposed at opposite ends of the housing 12 .
  • the battery cell 10 may further include a lower plastic.
  • the lower plastic is a plastic part, which is mainly used to be disposed in the internal environment of the battery cell 10 to provide insulation performance.
  • the lower plastic is disposed in the outer shell 12 and at the end of the electrode assembly 11 having the pole ear 112 , so as to achieve insulation between the outer shell 12 and the adapter 14 , and also between the outer shell 12 and the electrode assembly 11 .
  • the lower plastic can be connected to the outer shell 12. Specifically, the lower plastic can be connected to the shell 121 of the outer shell 12, and can also be connected to the end cover 122 of the outer shell 12.
  • FIG. 4 is an enlarged view of point A in Figure 3.
  • the battery cell 10 provided in the embodiment of the present application includes a shell 12, an electrode assembly 11, an electrode terminal 13, an adapter 14 and an insulating member 15.
  • the electrode assembly 11 is disposed in the shell 12.
  • the adapter 14 is disposed in the shell 12, and the adapter 14 is conductively connected to the electrode assembly 11 and the electrode terminal 13.
  • the insulating member 15 is disposed in the shell 12, and at least a portion of the insulating member 15 is located between the adapter 14 and the shell 12, and at least a portion of the insulating member 15 is spaced apart from the adapter 14.
  • the adapter 14 is conductively connected to the electrode assembly 11 and the electrode terminal 13, which means that the adapter 14 is conductively connected to the electrode assembly 11, and the adapter 14 is conductively connected to the electrode terminal 13.
  • the adapter 14 is conductively connected to the electrode assembly 11, which means that the adapter 14 is connected to the electrode assembly 11, and the adapter 14 is electrically conductive to the electrode assembly 11.
  • the adapter 14 is conductively connected to the electrode terminal 13, which means that the adapter 14 is connected to the electrode terminal 13, and the adapter 14 is electrically conductive to the electrode terminal 13. Based on this, the adapter 14 can realize the flow of current between the electrode assembly 11 and the electrode terminal 13.
  • the conductive connection method may include but is not limited to one or more of welding, bonding, etc. Welding may include but is not limited to one or more of laser welding, ultrasonic welding, penetration welding, etc.
  • the electrode assembly 11 includes a main body 111 and a tab 112 disposed on the main body 111 , and the adapter 14 is conductively connected to the tab 112 of the electrode assembly 11 .
  • the insulating member 15 is a member used to achieve the insulation effect between the housing 12 and the adapter 14.
  • the insulating member 15 may be a plastic member, such as the lower plastic mentioned above.
  • the insulating member 15 may also be a structural member made of other materials with insulation properties.
  • At least a portion of the insulating member 15 is located between the adapter 14 and the housing 12 , so that at least a portion of the insulating member 15 can separate the adapter 14 from the housing 12 , thereby achieving insulation between the adapter 14 and the housing 12 .
  • FIG3 and FIG4 illustrate a plane coordinate system, and the X axis and the Z axis are two mutually perpendicular coordinate axes in the plane coordinate system, that is, the Z axis is perpendicular to the X axis.
  • the first direction Z is parallel to the Z axis.
  • the adapter 14 is disposed between the wall of the housing 12 along the first direction Z and the electrode assembly 11. In some other possible designs, the adapter 14 may also be disposed between the wall of the housing 12 along the direction intersecting the first direction Z and the electrode assembly 11.
  • the electrode terminal 13 is disposed on a wall of the housing 12 along the first direction Z. In other possible designs, the electrode terminal 13 may also be disposed on a wall of the housing 12 along a direction intersecting the first direction Z.
  • the wall of the housing 12 along the first direction Z may be a shell 121 or an end cap 122. As shown in FIG3 , two opposite walls of the housing 12 along the first direction Z may both be end caps 122; or, two opposite walls of the housing 12 along the first direction Z may both be shells 121; or, one of the walls of the housing 12 along the first direction Z may be the shell 121, and the other wall may be the end cap 122.
  • the two pole tabs 112 are respectively a first pole tab 112 a and a second pole tab 112 b .
  • the first pole tab 112 a is a positive pole tab
  • the second pole tab 112 b is a negative pole tab; of course, the first pole tab 112 a may also be a negative pole tab, and the second pole tab 112 b may be a positive pole tab.
  • the first direction Z is a length direction or a height direction of the battery cell 10 .
  • the battery cell 10 includes an electrode terminal 13, an adapter 14, and an insulating member 15, which means that the battery cell 10 includes at least one electrode terminal 13, at least one adapter 14, and at least one insulating member 15.
  • the number of electrode terminals 13, the number of adapters 14, and the number of insulating members 15 may include but are not limited to the following three situations: the first situation is that the number of electrode terminals 13, the number of adapters 14, and the number of insulating members 15 are all one; the second situation is that, as shown in FIG. 3 and FIG. 4, the number of electrode terminals 13, the number of adapters 14, and the number of insulating members 15 are all two; the third situation is that the number of electrode terminals 13 and the number of adapters 14 are all two, and the number of insulating members 15 is one.
  • the electrode terminal 13 may be the first electrode terminal 13a
  • the adapter 14 is the first adapter 14a
  • the insulating member 15 is the first insulating member 15a.
  • the first adapter 14a is conductively connected to the first electrode tab 112a
  • the first adapter 14a is conductively connected to the first electrode terminal 13a
  • at least part of the first insulating member 15a is located between the first adapter 14a and the wall of the housing 12 along the first direction Z to achieve insulation between the first adapter 14a and the housing 12.
  • the electrode terminal 13 may also be the second electrode terminal 13b, the adapter 14 is the second adapter 14b, and the insulating member 15 is the second insulating member 15b.
  • the second adapter 14b is conductively connected to the second pole ear 112b, and the second adapter 14b is conductively connected to the second electrode terminal 13b, and at least part of the second insulating member 15b is located between the second adapter 14b and the wall of the shell 12 along the first direction Z to achieve insulation between the shell 12 and the second adapter 14b.
  • the two electrode terminals 13 are respectively the first electrode terminal 13a and the second electrode terminal 13b, and the two adapters 14 are respectively It is a first adapter 14a and a second adapter 14b, and the two insulating members 15 are respectively a first insulating member 15a and a second insulating member 15b.
  • the first adapter 14a is conductively connected to the first pole lug 112a, and the first adapter 14a is conductively connected to the first electrode terminal 13a.
  • the second adapter 14b is conductively connected to the second pole lug 112b, and the second adapter 14b is conductively connected to the second electrode terminal 13b.
  • At least part of the first insulating member 15a is located between the first adapter 14a and the wall of the shell 12 along the first direction Z to achieve insulation between the first adapter 14a and the shell 12.
  • At least part of the second insulating member 15b is located between the second adapter 14b and the wall of the shell 12 along the first direction Z to achieve insulation between the shell 12 and the second adapter 14b.
  • the two electrode terminals 13 are respectively the first electrode terminal 13a and the second electrode terminal 13b
  • the two adapters 14 are respectively the first adapter 14a and the second adapter 14b.
  • the first adapter 14a is conductively connected to the first pole lug 112a
  • the first adapter 14a is conductively connected to the first electrode terminal 13a
  • the second adapter 14b is conductively connected to the second pole lug 112b
  • the second adapter 14b is conductively connected to the second electrode terminal 13b.
  • the insulating member 15 can be a first insulating member 15a, and at least part of the first insulating member 15a is located between the first adapter 14a and the wall of the shell 12 along the first direction Z to achieve insulation between the first adapter 14a and the shell 12.
  • the insulating member 15 may also be a second insulating member 15 b , at least part of which is located between the second transition member 14 b and the wall of the housing 12 along the first direction Z, so as to achieve insulation between the housing 12 and the second transition member 14 b .
  • the wall of the housing 12 along the first direction Z includes a first wall 122 a and a second wall 122 b .
  • At least part of the first insulating member 15a is located between the outer shell 12 and the first adapter 14a, which means that at least part of the first insulating member 15a is located between the wall of the outer shell 12 along the first direction Z and the first adapter 14a, that is, at least part of the first insulating member 15a is located along the first direction Z between the first wall 122a and the first adapter 14a.
  • At least part of the second insulating member 15b is located between the outer shell 12 and the second adapter 14b, which means that at least part of the second insulating member 15b is located between the wall of the outer shell 12 along the first direction Z and the second adapter 14b, that is, at least part of the second insulating member 15b is located between the second wall 122b and the second adapter 14b along the first direction Z.
  • the first wall 122a may be provided on the housing 121 or the end cover 122.
  • the second wall 122b may be provided on the housing 121 or the end cover 122.
  • both the first wall 122a and the second wall 122b are provided on the end cover 122.
  • the first wall 122a and the second wall 122b mentioned above may be two opposite walls of the housing 12 along the first direction Z.
  • the first pole ear 112a and the second pole ear 112b are respectively arranged at two opposite ends of the electrode assembly 11 along the first direction Z
  • the first adapter 14a and the second adapter 14b are also respectively arranged at two opposite ends of the electrode assembly 11 along the first direction Z
  • the first insulating member 15a and the second insulating member 15b are also respectively arranged at two opposite ends of the electrode assembly 11 along the first direction Z
  • the first electrode terminal 13a and the second electrode terminal 13b are also respectively arranged at two opposite ends of the electrode assembly 11 along the first direction Z.
  • first insulating member 15a is located between the first wall 122a and the first adapter 14a along the first direction Z
  • second insulating member 15b is located between the second wall 122b and the second adapter 14b along the first direction Z.
  • the first wall 122a and the second wall 122b may be the same wall of the housing 12 along the first direction Z. Based on this, the first pole tab 112a and the second pole tab 112b are arranged at the same end of the electrode assembly 11 along the first direction Z, the first adapter 14a and the second adapter 14b are also arranged at the same end of the electrode assembly 11 along the first direction Z, the first insulating member 15a and the second insulating member 15b are also arranged at the same end of the electrode assembly 11 along the first direction Z, and the first electrode terminal 13a and the second electrode terminal 13b are also arranged at the same end of the electrode assembly 11 along the first direction Z.
  • At least part of the insulating member 15 is spaced apart from the adapter 14, which means that at least part of the insulating member 15 is spaced apart from the adapter 14, but not in direct contact with the adapter 14.
  • the space formed between at least part of the insulating member 15 and the adapter 14 can be filled with air or other components of the battery cell 10.
  • At least part of the insulating member 15 is spaced apart from the adapter 14 , which may include a situation where the entire insulating member 15 is completely spaced apart from the adapter 14 ; it may also include a situation where a part of the insulating member 15 is spaced apart from the adapter 14 , and another part of the insulating member 15 is in contact with the adapter 14 .
  • the battery cell 10 provided in the embodiment of the present application is arranged to be spaced apart from the adapter 14 by at least a portion of the insulating member 15.
  • the arrangement can slow down the heat conduction between the adapter 14 and the insulating member 15, thereby improving the problem of heat from the adapter 14 being conducted to the insulating member 15, causing the insulating performance of the insulating member 15 to fail. In this way, the insulating member 15 can achieve a good insulation effect between the adapter 14 and the housing 12.
  • the adapter 14 involved in each embodiment of the present application can be the first adapter 14a or the second adapter 14b;
  • the pole lug 112 can be the first pole lug 112a or the second pole lug 112b;
  • the electrode terminal 13 can be the first electrode terminal 13a or the second electrode terminal 13b;
  • the insulating member 15 can be the first insulating member 15a or the second insulating member 15b.
  • the electrode terminal 13 is the first electrode terminal 13a
  • the adapter 14 is the first adapter 14a
  • the insulating member 15 is the first insulating member 15a
  • the electrode terminal 13 is the second electrode terminal 13b
  • the adapter 14 is the second adapter 14b
  • the insulating member 15 is the second insulating member 15b.
  • the first electrode terminal 13 a is disposed on the first wall 122 a
  • the second electrode terminal 13 b is disposed on the second wall 122 b .
  • the insulating member 15 may also be located between the wall of the housing 12 along the first direction Z and the electrode assembly 11 to separate the electrode assembly 11 from the wall of the housing 12 along the first direction Z. In this way, the insulating member 15 may also achieve insulation performance between the electrode assembly 11 and the housing 12.
  • the adapter 14 is disposed at the end of the electrode assembly 11 along the first direction Z.
  • the insulating member 15 includes a body portion 151, and along the first direction Z, the body portion 151 is located between the adapter 14 and the housing 12, and is spaced apart from the adapter 14 along the first direction Z.
  • the main body 151 is a part of the insulating member 15 , and the main body 151 also has insulating properties.
  • main body 151 is located between the wall of the housing 12 along the first direction Z and the adapter 14 so as to achieve insulation between the adapter 14 and the housing 12 .
  • the adapter 14 is disposed at the end of the electrode assembly 11 along the first direction Z, and the main body 151 is located between the wall of the housing 12 along the first direction Z and the adapter 14, the adapter 14 and the main body 151 are spaced apart along the first direction Z, the adapter 14 is disposed between the wall of the housing 12 along the first direction Z and the electrode assembly 11, and the electrode assembly 11 is disposed on a side of the adapter 14 away from the main body 151 along the first direction Z. Based on this, the adapter 14 is located on a side of the main body 151 along the first direction Z facing the electrode assembly 11.
  • the insulating member 15 may be a first insulating member 15a or a second insulating member 15b. That is, both the first insulating member 15a and the second insulating member 15b may include a body portion 151.
  • FIG. 4 mainly illustrates the positional relationship between the first wall 122a, the first pole ear 112a, the first insulating member 15a, and the first adapter 14a involved below.
  • the main body 151 of the first insulating member 15a is located between the wall of the housing 12 along the first direction Z and the first adapter 14a, that is, the main body 151 of the first insulating member 15a is located between the wall of the housing 12 close to the first adapter 14a along the first direction Z and the first adapter 14a, that is, the main body 151 of the first insulating member 15a is located between the first wall 122a of the housing 12 and the first adapter 14a along the first direction Z.
  • the main body 151 of the first insulating member 15a is spaced apart from the first adapter 14a along the first direction Z.
  • the main body 151 of the second insulating member 15b is located between the wall of the housing 12 along the first direction Z and the second adapter 14b, that is, the main body 151 of the second insulating member 15b is located between the wall of the housing 12 having the second adapter 14b and the second adapter 14b along the first direction Z, that is, the main body 151 of the second insulating member 15b is located between the second wall 122b of the housing 12 and the second adapter 14b along the first direction Z.
  • the main body 151 of the second insulating member 15b and the second adapter 14b are arranged at intervals along the first direction Z.
  • Such a configuration enables the insulating member 15 to achieve insulation between the housing 12 and the adapter 14, and the main body 151 of the insulating member 15 can also be spaced apart from the adapter 14 to slow down the conduction of heat between the adapter 14 and the main body 151, thereby improving the problem of insulation failure of the main body 151.
  • Figure 5 is a schematic diagram of the matching of the end cap 122, the first insulating member 15a and the first electrode terminal 13a of the battery cell 10 provided in some embodiments of the present application.
  • the insulating member 15 also includes a first boss 152, which is arranged on the side of the body 151 facing the electrode assembly 11 along the first direction Z.
  • the adapter 14 is spaced apart from the first boss 152 along the second direction X, and the second direction X is spaced apart from the first electrode terminal 13a.
  • Direction Z crosses.
  • the first boss 152 is a component disposed on one side of the body 151 along the first direction Z toward the electrode assembly 11, which is a part of the insulating member 15 and also has insulating properties.
  • the first boss 152 is used to constrain the isolation film wrapped around the electrode assembly 11 to ensure the insulation effect of the isolation film on the electrode assembly 11 and the housing 12 to a certain extent.
  • the main body 151 of the first insulating member 15a is located between the first wall 122a of the housing 12 and the first adapter 14a, so that the first adapter 14a is located on the side of the main body 151 of the first insulating member 15a facing the electrode assembly 11 along the first direction Z.
  • the first boss 152 of the first insulating member 15a and the first adapter 14a are both arranged on the side of the main body 151 of the first insulating member 15a facing the electrode assembly 11 along the first direction Z, and the first boss 152 of the first insulating member 15a and the first adapter 14a are spaced apart along the second direction X.
  • the body 151 of the second insulating member 15b is located between the second wall 122b of the housing 12 and the second adapter 14b, so that the second adapter 14b is located on the side of the body 151 of the second insulating member 15b facing the electrode assembly 11 along the first direction Z.
  • the first boss 152 of the second insulating member 15b and the second adapter 14b are both arranged on the side of the body 151 of the second insulating member 15b facing the electrode assembly 11 along the first direction Z, and the first boss 152 of the second insulating member 15b and the first adapter 14a are spaced apart along the second direction X.
  • intersection means non-parallel.
  • the two directions of intersection are non-parallel, that is, the two directions form an angle greater than 0° and less than 180°.
  • the two directions can be perpendicular or non-perpendicular, and the two directions can be respectively set on two planes that are not parallel to each other, or on the same plane.
  • the second direction X refers to a direction intersecting with the first direction Z.
  • the second direction X intersecting with the first direction Z means that the second direction X is not parallel to the first direction Z, that is, the first direction Z and the second direction X can form an angle greater than 0° and less than 180°.
  • the first direction Z and the second direction X can be perpendicular to each other or not.
  • the first direction Z and the second direction X can be directions intersecting on the same plane, or directions on planes that are not in the same plane, and the projection of the second direction X on the plane where the first direction Z is located can intersect with the first direction Z.
  • FIG5 shows a spatial coordinate system, in which the X-axis, the Y-axis and the Z-axis are three coordinate axes perpendicular to each other in the spatial coordinate system, that is, the X-axis is perpendicular to the Y-axis, the X-axis is perpendicular to the Z-axis, and the Y-axis is perpendicular to the Z-axis.
  • the plane coordinate system shown in FIG3 and FIG4 is a plane coordinate system formed by the X-axis and the Z-axis of the spatial coordinate system in FIG5.
  • the second direction X is parallel to the X-axis, that is, the second direction X is perpendicular to the first direction Z.
  • the adapter 14 is not only spaced apart from the main body 151 of the insulating member 15, but also spaced apart from the first boss 152 of the insulating member 15. This can better slow down the conduction of heat between the adapter 14 and the insulating member 15, so as to improve the problem of the heat of the adapter 14 causing the insulation performance of the insulating member 15 to fail, specifically including the insulation performance failure of the main body 151 of the insulating member 15 and the insulation performance failure of the first boss 152.
  • the wall of the shell 12 along the first direction Z is provided with a liquid injection hole 1201.
  • the insulating member 15 also includes a boss 153, which is disposed on the side of the body 151 along the first direction Z toward the electrode assembly 11.
  • the boss 153 is connected to the liquid injection hole 1201 and is connected to the inside of the shell 12.
  • the adapter 14 and the boss 153 are spaced apart along the second direction X, and the second direction X intersects with the first direction Z.
  • the injection hole 1201 refers to an opening provided on the outer shell 12 for allowing electrolyte to enter the internal environment of the battery cell 10. Specifically, the injection hole 1201 is provided on the wall of the outer shell 12 along the first direction Z. The injection hole 1201 can be provided on the shell 121 of the outer shell 12, or on the end cover 122 of the outer shell 12.
  • the protruding column 153 refers to a component disposed on one side of the main body 151 along the first direction Z toward the electrode assembly 11 , is a part of the insulating member 15 , and also has insulating properties.
  • the insulating member 15 is provided with a through hole 1501, and the through hole 1501 penetrates the main body 151 and the protrusion 153 of the insulating member 15 along the first direction Z.
  • the through hole 1501 is connected to the internal environment of the battery cell 10 and is connected to the injection hole 1201.
  • the injection hole 1201 is used to communicate with the external environment of the battery cell 10. In this way, the external electrolyte can enter the internal environment of the battery cell 10 through the injection hole 1201 and the through hole 1501 in turn, so as to infiltrate the electrode assembly 11.
  • the injection holes 1201 and the through holes 1501 are distributed in sequence along the first direction Z and are connected in sequence.
  • the boss 153 has various functions.
  • the boss 153 can be used to The electrolyte in the hole 1201 acts as a buffer to improve the problem that the electrolyte pressure is too high and causes damage to the electrode assembly 11.
  • the protrusion 153 can be used to guide the electrolyte passing through the injection hole 1201 so that the electrolyte enters the electrode assembly 11 faster.
  • the body 151 in the first direction Z, is located between the wall of the housing 12 having the adapter 14 along the first direction Z and the adapter 14, so that the adapter 14 is located on the side of the body 151 facing the electrode assembly 11 along the first direction Z.
  • the boss 153 and the adapter 14 are both provided on the side of the body 151 facing the electrode assembly 11 along the first direction Z, and the boss 153 and the adapter 14 are spaced apart along the second direction X.
  • the first electrode tab 112a is a positive electrode tab
  • the injection hole 1201 is provided on the wall of the housing 12 having the first insulating member 15a along the first direction Z, that is, the injection hole 1201 is provided on the first wall 122a.
  • the first insulating member 15a further includes a convex column 153, and the convex column 153 of the first insulating member 15a and the first adapter 14a are both provided on the side of the main body 151 of the first insulating member 15a facing the electrode assembly 11 along the first direction Z, and the convex column 153 of the first insulating member 15a and the first adapter 14a are arranged at intervals along the second direction X.
  • the adapter 14 is not only spaced apart from the main body 151 of the insulating member 15, but also spaced apart from the protrusion 153 of the insulating member 15. This can better slow down the conduction of heat between the adapter 14 and the insulating member 15, so as to improve the problem that the heat of the adapter 14 causes the insulation performance of the insulating member 15 to fail.
  • the first bosses 152 and the bosses 153 are distributed along the second direction X at intervals.
  • the insulating member 15 may further include a second boss 154 , which is disposed on a side of the body portion 151 facing the electrode assembly 11 along the first direction Z.
  • the second boss 154 is disposed at an end of the boss 153 away from the first boss 152 .
  • the wall of the housing 12 having the second insulating member 15b along the first direction Z may not be provided with the injection hole 1201, that is, the second wall 122b is not provided with the injection hole 1201.
  • the insulating member 15 may not be provided with the protruding column 153 and the second boss 154. That is, the second adapter 14b may be provided with the above-mentioned first boss 152 at one end or both opposite ends along the second direction X, and in the second direction X, the first bosses 152 at both opposite ends of the second adapter 14b are spaced apart from the second adapter 14b along the second direction X.
  • the insulating member 15 is spaced apart from the adapter 14, and may include a main body 151 of the insulating member 15 spaced apart from the adapter 14 along the first direction Z, and may also include a first boss 152 of the insulating member 15 spaced apart from the adapter 14 along the second direction X, and may also include a boss 153 of the insulating member 15 spaced apart from the adapter 14 along the second direction X.
  • a portion of the insulating member 15 is spaced apart from the adapter 14, and the “portion of the insulating member 15” may include at least one of the above-mentioned body portion 151, the first boss 152, and the boss 153; another portion of the insulating member 15 contacts the adapter 14, that is, the insulating member 15 also has a portion for contacting the adapter 14.
  • the portion of the insulating member 15 for contacting the adapter 14 may contact the adapter 14 along at least one of the first direction Z, the second direction X, and the third direction Y.
  • the portion of the insulating member 15 that is used to contact the adapter 14 can be inserted into the adapter 14 along the first direction Z, and contact the adapter 14 along at least one of the first direction Z, the second direction X, and the third direction Y to achieve positioning between the insulating member 15 and the adapter 14.
  • the portion of the insulating member 15 that contacts the adapter 14 can be located on the side of the adapter 14 along the third direction Y, and contact the adapter 14 along the third direction Y to achieve positioning of the adapter 14 and the insulating member 15 in the third direction Y.
  • the third direction Y intersects the first direction Z, and the third direction Y intersects the second direction X.
  • the meaning of the intersection can refer to the explanation of the intersection of the first direction Z and the second direction X, which will not be repeated here.
  • the third direction Y is parallel to the Y axis.
  • a gap formed between at least a portion of the insulating member 15 and the adapter 14 is greater than 0.1 mm.
  • the insulating member 15 is arranged at a distance from the adapter 14, and a gap is formed between them, and the gap is larger than 0.1mm.
  • the main body 151 of the insulating component 15 and the adapter 14 are spaced apart along the first direction Z to form a first gap H1 , and the first gap H1 is greater than 0.1 mm.
  • the first boss 152 of the insulating member 15 and the adapter 14 are spaced apart from each other along the second direction X, and a second gap H2 is formed therebetween.
  • the second gap H2 is greater than 0.1 mm.
  • the protruding pillars 153 of the insulating member 15 and the adapter 14 are spaced apart from each other along the second direction X, and a third gap H3 is formed therebetween.
  • the third gap H3 is greater than 0.1 mm.
  • the gap formed between at least a portion of the insulating member 15 and the adapter 14 is greater than 0.1 mm, and may include at least one of the above three possible designs.
  • Such an arrangement allows a larger gap to be provided between at least a portion of the insulating member 15 and the adapter 14 , thereby slowing down the conduction of heat between the adapter 14 and the insulating member 15 , thereby facilitating improvement of the problem of insulation performance failure of the insulating member 15 due to heat from the adapter 14 .
  • a gap formed between at least a portion of the insulating member 15 and the adapter 14 is less than 2 mm.
  • the gap formed between at least part of the insulating member 15 and the adapter 14 is greater than 0.1 mm and less than 2 mm, and can be 0.2 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.8 mm, 1.9 mm, etc.
  • the first gap H1 is less than 2 mm.
  • the second gap H2 is less than 2 mm.
  • the third gap H3 is less than 2 mm.
  • the gap formed between at least a portion of the insulating member 15 and the adapter 14 is smaller than 2 mm, and may include at least one of the above three possible designs.
  • Such arrangement allows a relatively large gap between at least a portion of the insulating member 15 and the adapter 14, but not too large.
  • the distribution compactness of the adapter 14 and the insulating member 15 can also be improved, thereby helping to achieve the compactness of the structure of the battery cell 10 and improve the energy density of the battery cell 10.
  • the electrode assembly 11 is welded to the adapter 14 .
  • the tab 112 of the electrode assembly 11 is welded to the adapter 14 .
  • first pole tab 112a is welded to the first adapter 14a
  • second pole tab 112b is welded to the second adapter 14b.
  • the electrode assembly 11 and the adapter 14 can be connected to each other, so as to achieve the connection between the electrode assembly 11 and the electrode terminal 13 .
  • FIG. 3 and FIG. 4 together, and in combination with other drawings.
  • the portion of the adapter 14 used for welding with the electrode assembly 11 is spaced apart from the insulating member 15 .
  • a portion of the adapter 14 is used for welding with the electrode assembly 11 to achieve conductive connection between the adapter 14 and the electrode assembly 11. During welding of the electrode assembly 11 and the adapter 14, the temperature of the portion of the adapter 14 used for welding with the electrode assembly 11 rises sharply.
  • the speed at which the heat generated by the electrode assembly 11 and the adapter 14 during welding is transferred to the insulating member 15 can be slowed down, thereby improving the problem of insulation failure of the insulating member 15.
  • first weld mark and the second weld mark mentioned below are both arranged on the portion of the adapter 14 used for welding with the electrode assembly 11 .
  • the portion of the adapter 14 used for welding with the electrode assembly 11 may be spaced apart from the main body 151 of the insulating member 15 along the first direction Z, or may be spaced apart from the first boss 152 along the second direction X. Furthermore, the adapter 14 may be divided into two parts, one of which is used for welding with the electrode assembly 11. In the second direction X, the other part of the adapter 14 may be located between the portion of the adapter 14 used for welding with the electrode assembly 11 and the boss 153, so that the adapter 14 is used for welding with the electrode assembly 11. The portion welded to the electrode assembly 11 may also be spaced apart from the protrusion 153 .
  • FIG. 6 is a schematic diagram of the matching of the end cap 122 and the first adapter 14a of the battery cell 10 provided in some embodiments of the present application.
  • the schematic diagram is a view of the end cap 122 and the first adapter 14a in the direction of the second adapter 14b pointing to the first adapter 14a along the first direction Z.
  • the schematic diagram shows the projection of the first electrode terminal 13a, the first connecting portion 1121a and the second connecting portion 1122a on the first adapter 14a through dotted lines.
  • the adapter 14 is provided with a positioning hole 1401, and the electrode terminal 13 is inserted into the positioning hole 1401.
  • the positioning hole 1401 passes through one end of the adapter 14 away from the electrode assembly 11 along the first direction Z. In other possible designs, as shown in FIG. 3 and FIG. 6 , the positioning hole 1401 passes through opposite ends of the adapter 14 along the first direction Z.
  • the electrode terminal 13 is disposed on the wall of the housing 12 along the first direction Z, and the electrode terminal 13 is inserted into the positioning hole 1401 along the first direction Z.
  • the first adapter 14a is provided with the above-mentioned positioning hole 1401, and the first electrode terminal 13a is plugged into the positioning hole 1401 of the first adapter 14a.
  • the second adapter 14b may also be provided with the above-mentioned positioning hole 1401, and the second electrode terminal 13b is plugged into the positioning hole 1401 of the second adapter 14b.
  • both the first adapter 14a and the second adapter 14b are provided with the above-mentioned positioning hole 1401, the first electrode terminal 13a is plugged into the positioning hole 1401 on the first adapter 14a, and the second electrode terminal 13b is plugged into the positioning hole 1401 on the second adapter 14b.
  • the electrode terminal 13 By inserting the electrode terminal 13 into the positioning hole 1401 , it is convenient to position the electrode terminal 13 on the battery cell 10 , and it is also convenient to achieve the conductive connection between the electrode terminal 13 and the adapter 14 .
  • the electrode terminal 13 and the adapter 14 can be connected by penetration welding, so that the positioning hole 1401 can be sealed, and the welding process is simple, only welding is required, which is easy to implement and low in cost.
  • the electrode assembly 11 is welded to the adapter 14 , and the weld marks formed by welding the electrode assembly 11 to the adapter 14 are spaced apart from the positioning holes 1401 .
  • a weld mark is formed between the tab 112 and the adapter 14.
  • the weld mark refers to a structure formed by the solidification of the solder used in the welding process of the tab 112 and the adapter 14.
  • the weld mark is spaced apart from the positioning hole 1401.
  • the weld marks formed by welding the electrode assembly 11 and the adapter 14 may be spaced apart from the positioning hole 1401 along a direction intersecting the first direction Z. As an example, the weld marks formed by welding the electrode assembly 11 and the adapter 14 are spaced apart from the positioning hole 1401 along the second direction X.
  • Fig. 6 illustrates a plane coordinate system, in which the X axis and the Y axis are two perpendicular coordinate axes, that is, the X axis is perpendicular to the Y axis.
  • the plane coordinate system of Fig. 6 is a plane coordinate system composed of the X axis and the Y axis of the spatial coordinate system of Fig. 5 .
  • the weld mark formed after the first pole tab 112a and the first adapter 14a are welded is spaced apart from the positioning hole 1401 on the first adapter 14a.
  • the weld mark formed after the first pole tab 112a and the first adapter 14a are welded may include the first connection portion 1121a mentioned below, or may include the first connection portion 1121a and the second connection portion 1122a mentioned below at the same time.
  • the weld mark formed after the second pole tab 112b and the second adapter 14b are welded may also be spaced apart from the positioning hole 1401 on the second adapter 14b.
  • the weld mark formed after the second pole tab 112b and the second adapter 14b are welded may include the third connection portion 1121b mentioned below, or may include the third connection portion 1121b and the fourth connection portion 1122b mentioned below at the same time.
  • Such a configuration can improve the problem of solder used in the welding process of the pole tab 112 and the adapter 14 flowing into the positioning hole 1401, and further improve the problem that the welding process of the pole tab 112 and the adapter 14 will interfere with the positioning function of the positioning hole 1401 on the electrode terminal 13, thereby facilitating the assembly of the battery cell 10.
  • Figure 7 is a schematic diagram of the second adapter 14b of the battery cell 10 provided in some embodiments of the present application, which is a view of the second adapter 14b in the direction from the first adapter 14a to the second adapter 14b along the first direction Z, and the schematic diagram shows the projection of the second electrode terminal 13b, the third connecting portion 1121b and the fourth connecting portion 1122b on the second adapter 14b through dotted lines.
  • the electrode assembly 11 includes a main body 111 and a pole ear 112 provided on the main body 111.
  • the pole ear 112 includes a plurality of sub-electrodes.
  • Ear 112 multiple sub-electrode ears 112 are welded to form a first weld mark. At least part of the first weld mark is welded to the adapter 14 to form a second weld mark, and the second weld mark is spaced apart from the positioning hole 1401.
  • the sub-electrode tab 112 is a partial structure of the electrode tab 112 , and a plurality of sub-electrode tabs 112 can constitute the electrode tab 112 .
  • the sub-electrode tab 112 is connected to the main body 111 .
  • the multiple sub-tabs 112 of the tab 112 may be pre-welded first, and a first weld mark is formed on the tab 112 after the multiple sub-tabs 112 of the tab 112 are pre-welded. Then, at least a portion of the first weld mark is welded to the adapter 14, and at least a portion of the first weld mark is welded to the adapter 14 to form a second weld mark between the first weld mark and the adapter 14.
  • weld mark formed by welding the electrode assembly 11 and the adapter 14 may include a second weld mark, and the second weld mark is spaced apart from the positioning hole 1401 .
  • the pole tab 112 may be a first pole tab 112a or a second pole tab 112b. Both the first pole tab 112a and the second pole tab 112b may include a sub-pole tab 112, wherein the sub-pole tab 112 of the first pole tab 112a is the first sub-pole tab 112, and the sub-pole tab 112 of the second pole tab 112b is the second sub-pole tab 112. That is, a plurality of first sub-pole tabs 112 form the first pole tab 112a, and a plurality of second sub-pole tabs 112 form the second pole tab 112b.
  • sub-electrode tab 112 involved in each embodiment of the present application can be the first sub-electrode tab 112 or the second sub-electrode tab 112 .
  • a plurality of first sub-electrode tabs 112 are welded to form a first weld mark on the first electrode tab 112a. At least a portion of the first weld mark on the first electrode tab 112a is welded to the first transition piece 14a to form a second weld mark between the first weld mark on the first electrode tab 112a and the first transition piece 14a.
  • a plurality of second sub-electrode tabs 112 are welded to form a first weld mark on the second electrode tab 112b. At least a portion of the first weld mark on the second electrode tab 112b is welded to the second transition piece 14b to form a second weld mark between the first weld mark on the second electrode tab 112b and the second transition piece 14b.
  • the first weld mark of the first pole tab 112a and the second weld mark between the first adapter 14a are spaced apart from the positioning hole 1401 on the first adapter 14a.
  • the second adapter 14b is also provided with a positioning hole 1401
  • the first weld mark of the second pole tab 112b and the second weld mark between the second adapter 14b can also be spaced apart from the positioning hole 1401 on the second adapter 14b.
  • the plane coordinate system of FIG. 7 is a plane coordinate system composed of the X-axis and the Y-axis of the spatial coordinate system of FIG. 5 .
  • the weld mark formed by welding the electrode assembly 11 and the adapter 14 can include a second weld mark, and the second weld mark is spaced apart from the positioning hole 1401, so that the problem of the solder used in the welding process of the pole tab 112 and the adapter 14 flowing into the positioning hole 1401 can be improved, and further the problem that the welding process of the pole tab 112 and the adapter 14 will interfere with the positioning function of the positioning hole 1401 on the electrode terminal 13 can be improved, thereby facilitating the assembly of the battery cell 10.
  • the first weld mark is formed by welding a plurality of sub-pole tabs 112 of the pole tab 112, which facilitates the welding operation of the pole tab 112 and the adapter 14.
  • a plurality of sub-electrode tabs 112 are welded and welded with the adapter 14 to form a first weld mark, and the first weld mark is spaced apart from the positioning hole 1401 .
  • weld mark formed by welding the electrode assembly 11 and the adapter 14 can also include a first weld mark, and the first weld mark is spaced apart from the positioning hole 1401 .
  • the tabs 112 are also welded to the adapter 14, thus increasing the number of welding times between the tabs 112 and the adapter 14, and improving the conduction strength between the adapter 14 and the tabs 112.
  • the first weld marks are also spaced apart from the positioning holes 1401, so that during the welding process of the sub-electrode tabs 112 and the adapter 14, the solder is not easy to flow into the positioning holes 1401, thereby improving the problem that the welding process between the tabs 112 and the adapter 14 will interfere with the positioning function of the positioning holes 1401 on the electrode terminals 13, thereby facilitating the assembly of the battery cell 10.
  • the minimum distance between the weld mark formed by welding and the positioning hole 1401 is 0.2 to 6 mm.
  • the weld mark formed by welding the electrode assembly 11 and the adapter 14 may include a first weld mark and a second weld mark, or may include the second weld mark but not the first weld mark.
  • the first weld mark is also welded with the first adapter 14a, and at least part of the first weld mark is welded with the first adapter 14a to form a second weld mark.
  • the weld mark formed by the welding of the electrode assembly 11 and the adapter 14 may include the first weld mark and the second weld mark.
  • the first weld mark is spaced apart from the first adapter 14a, and the second weld mark is spaced apart from the positioning hole 1401.
  • the orthographic projection of the first weld mark on the first adapter 14a is larger than the second weld mark and covers the second weld mark.
  • the minimum spacing between the weld mark formed by the welding of the electrode assembly 11 and the adapter 14 and the positioning hole 1401 is the straight-line distance between the first weld mark and the positioning hole 1401, which is the first spacing H4.
  • the weld mark formed by welding the electrode assembly 11 and the adapter 14 may include the second weld mark, but not the first weld mark.
  • the second weld mark is spaced apart from the positioning hole 1401. Based on this, the minimum spacing between the weld mark formed by welding the electrode assembly 11 and the adapter 14 and the positioning hole 1401 is the straight-line distance between the second weld mark and the positioning hole 1401, which is the second spacing H5.
  • the minimum distance between the weld mark formed by welding the electrode assembly 11 and the adapter 14 and the positioning hole 1401 can be 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, etc.
  • Such arrangement allows the minimum spacing between the weld mark formed by welding the electrode assembly 11 and the adapter 14 and the positioning hole 1401 to have a suitable range, which can improve the problem of solder flowing into the positioning hole 1401 during the welding process of the electrode assembly 11 and the adapter 14, thereby improving the problem of the welding process of the electrode assembly 11 and the adapter 14 interfering with the positioning operation of the positioning hole 1401 on the electrode terminal 13.
  • the weld mark, the positioning hole 1401, etc. formed by welding the electrode assembly 11 and the adapter 14 can be compactly distributed on the adapter 14, so that the size of the adapter 14 can be reduced.
  • the electrode assembly 11 includes a main body 111 and a pole ear 112 provided on the main body 111, the pole ear 112 includes a first pole ear 112a, the electrode terminal 13 includes a first electrode terminal 13a, the adapter 14 includes a first adapter 14a, and the insulating member 15 includes a first insulating member 15a.
  • the first adapter 14a is conductively connected to the first pole ear 112a and the first electrode terminal 13a, at least a portion of the first insulating member 15a is located between the first adapter 14a and the housing 12, and at least a portion of the first insulating member 15a is spaced apart from the first adapter 14a.
  • the first adapter 14a is conductively connected to the first pole ear 112a to form a plurality of spaced apart first connecting portions 1121a.
  • the first connection portion 1121 a refers to a structure formed by conductive connection between the first adapter 14 a and the first tab 112 a .
  • the first connection portion 1121 a is disposed between the first adapter 14 a and the first tab 112 a .
  • the first connection portion 1121a formed by the conductive connection between the first adapter 14a and the first pole tab 112a refers to the second weld mark mentioned above.
  • the first pole lug 112a is conductively connected to the first adapter 14a to form a plurality of first connecting portions 1121a that are spaced apart, so that the first pole lug 112a is connected to a plurality of different positions of the first adapter 14a.
  • the current distribution between the first adapter 14a and the first pole lug 112a can be more uniform, so that the overcurrent temperature of the first adapter 14a can be reduced to improve the problem of heat concentration caused by current concentration in the first adapter 14a, and further improve the problem of the insulation performance failure of the first insulating member 15a caused by excessive heat in the first adapter 14a.
  • a greater overcurrent capacity can be provided between the first adapter 14a and the first pole lug 112a.
  • the housing 12 is provided with a liquid injection hole 1201 , and a plurality of first connection portions 1121 a are provided on a side of the first electrode terminal 13 a away from the liquid injection hole 1201 .
  • the injection hole 1201 refers to a hole for supplying electrolyte into the internal environment of the battery cell 10 .
  • the first connection portion 1121a is located on a side of the first electrode terminal 13a away from the injection hole 1201. As an example, as shown in FIG6, the first connection portion 1121a is located on a side of the first electrode terminal 13a away from the injection hole 1201 along the second direction X. That is, in the second direction X, the first electrode terminal 13a is located between the injection hole 1201 and the first connection portion 1121a, and the connection line (straight line) between the injection hole 1201 and the first connection portion 1121a can pass through the first electrode terminal 13a.
  • the plurality of first connection portions 1121a are located on the same side of the first electrode terminal 13a away from the injection hole 1201 along the second direction X, that is, a connecting line (straight line) between any two adjacent first connection portions 1121a does not pass through the first electrode terminal 13a.
  • the first connection portion 1121a is located on the side of the first electrode terminal 13a away from the injection hole 1201, the first adapter 14a can be arranged as far away from the injection hole 1201 as possible, so that the first adapter 14a will not interfere with the operation of the injection hole 1201.
  • the injection hole 1201 and the first adapter 14a are spaced apart so that the first adapter 14a is arranged away from the injection hole 1201. In this way, the first adapter 14a will not interfere with the operation of injecting electrolyte into the housing 12.
  • the plurality of first connection parts 1121a can be distributed on opposite sides of the first electrode terminal 13a, specifically, at least part of the first connection part 1121a of the first electrode terminal 13a is disposed between two first connection parts 1121a, that is, the connection line (straight line) of the two first connection parts 1121a can pass through the first electrode terminal 13a.
  • the current distribution of the first adapter 14a can be made more uniform, and the risk of insulation performance failure of the first insulating member 15a can be reduced.
  • a first wall 122a is disposed on one side of the housing 12 along the first direction Z, and the first electrode terminal 13a and the injection hole 1201 are spaced apart from each other on the first wall 122a.
  • injection hole 1201 and the first electrode terminal 13 a are disposed on the same wall of the housing 12 along the first direction Z.
  • the injection hole 1201 and the first adapter 14a are spaced apart along the first direction Z. Furthermore, the injection hole 1201 and the first adapter 14a are spaced apart along the second direction X, so that the injection hole 1201 and the first adapter 14a are spaced apart.
  • the first electrode terminal 13 a and the liquid injection hole 1201 are arranged on the same wall of the housing 12 along the first direction Z, which helps to improve the compactness of the structure of the battery cell 10 .
  • the first pole tab 112a includes a plurality of first sub-pole tabs 112, and the plurality of first sub-pole tabs 112 are connected to form a second connecting portion 1122a. At least a portion of the second connecting portion 1122a is conductively connected to the first adapter 14a to form a first connecting portion 1121a.
  • the second connection portion 1122 a refers to a structure formed by connecting a plurality of first sub-electrode tabs 112 , and the second connection portion 1122 a is disposed on the first electrode tab 112 a .
  • the plurality of first sub-electrode tabs 112 are connected by welding, the plurality of first sub-electrode tabs 112 are connected to form the second connection portion 1122 a , which refers to the first weld mark mentioned above.
  • the plurality of first sub-pole tabs 112 can be connected to form the second connection portion 1122a, and then at least a portion of the second connection portion 1122a can be conducted and connected to the first adapter 14a, so that the first pole tab 112a and the first adapter 14a are conducted and connected. In this way, the first pole tab 112a can be better conducted and connected to the first adapter 14a.
  • the pole tab 112 further includes a second pole tab 112b
  • the electrode terminal 13 further includes a second electrode terminal 13b
  • the adapter 14 further includes a second adapter 14b
  • the insulating member 15 further includes a second insulating member 15b.
  • the second adapter 14b is conductively connected to the second pole tab 112b and the second electrode terminal 13b, at least a portion of the second insulating member 15b is located between the second adapter 14b and the housing 12, and at least a portion of the second insulating member 15b is spaced apart from the second adapter 14b.
  • the number of electrode terminals 13, the number of adapters 14, and the number of insulating members 15 are all two, the two electrode terminals 13 are respectively the first electrode terminal 13a and the second electrode terminal 13b, the two adapters 14 are respectively the first adapter 14a and the second adapter 14b, and the two insulating members 15 are respectively the first insulating member 15a and the second insulating member 15b.
  • the first adapter 14a is conductively connected to the first pole lug 112a
  • the first adapter 14a is conductively connected to the first electrode terminal 13a.
  • the second adapter 14b is conductively connected to the second pole lug 112b
  • the second adapter 14b is conductively connected to the second electrode terminal 13b.
  • At least part of the first insulating member 15a is located between the first adapter 14a and the inner wall of the shell 12 to achieve insulation between the first adapter 14a and the shell 12.
  • At least part of the second insulating member 15b is arranged between the second adapter 14b and the shell 12 to achieve insulation between the shell 12 and the second adapter 14b.
  • an insulating member 15 can be disposed between each adapter 14 and the housing 12 , thereby achieving insulation between each adapter 14 and the housing 12 .
  • the pole tab 112 further includes a second pole tab 112b
  • the electrode terminal 13 further includes a second electrode terminal 13b
  • the adapter 14 further includes a second adapter 14b
  • the second adapter 14b is conductively connected to the second pole tab 112b and the second electrode terminal 13b.
  • the second pole tab 112b is conductively connected to the second adapter 14b to form a plurality of spaced third connection portions 1121b.
  • the third connection portion 1121b refers to a structure formed by conductive connection between the second adapter 14b and the second tab 112b.
  • the third connection portion 1121b is disposed between the second adapter 14b and the second tab 112b.
  • the third connection portion 1121b formed by the conductive connection between the second adapter 14b and the second pole tab 112b refers to the second weld mark mentioned above.
  • the second pole lug 112b is conductively connected to the second adapter 14b to form a plurality of spaced third connection portions 1121b, so that the second pole lug 112b is connected to a plurality of different positions of the second adapter 14b.
  • the current distribution between the second adapter 14b and the second pole lug 112b can be more uniform, so that the overcurrent temperature of the second adapter 14b can be reduced to improve the problem of heat concentration caused by current concentration in the second adapter 14b, and further improve the problem of insulation performance failure of the second insulating member 15b caused by excessive heat in the second adapter 14b.
  • the second adapter 14b and the second pole lug 112b can have a larger overcurrent capacity.
  • At least a portion of the second electrode terminal 13b is located between the two third connection portions 1121b.
  • connection line (straight line) of the two third connection portions 1121 b may pass through the second electrode terminal 13 b .
  • two third connection portions 1121b are spaced apart along the second direction X. Moreover, a portion of the second electrode terminal 13b is located between the two third connection portions 1121b, so that one of the third connection portions 1121b, a portion of the second electrode terminal 13b, and another third connection portion 1121b are sequentially distributed along the second direction X, so that the two third connection portions 1121b are disposed on opposite sides of the second electrode terminal 13b along the second direction X.
  • the two third connection portions 1121b may also be spaced apart along directions intersecting the first direction Z and the second direction X, respectively, and at least a portion of the second electrode terminal 13b is located between the two third connection portions 1121b.
  • Such an arrangement allows the multiple positions of the second adapter 14b for connecting to the second pole ear 112b to be more dispersed, which can make the current inside the battery cell 10 more uniform, thereby reducing the overcurrent temperature of the second adapter 14b, and further reducing the risk of the second adapter 14b causing the insulation performance of the second insulating member 15b to fail.
  • the second pole tab 112b includes a plurality of second sub-pole tabs 112, which are connected to form a fourth connection portion 1122b, and at least a portion of the fourth connection portion 1122b is conductively connected to the second adapter 14b to form a third connection portion 1121b.
  • the fourth connection portion 1122 b refers to a structure formed by connecting a plurality of second sub-electrode tabs 112 , and the fourth connection portion 1122 b is disposed on the second electrode tab 112 b .
  • the fourth connection portion 1122 b formed by connecting the plurality of second sub-electrode tabs 112 refers to the first weld mark mentioned above.
  • the plurality of second sub-pole tabs 112 can be connected to form the fourth connection portion 1122b, and then at least a portion of the fourth connection portion 1122b can be conducted and connected to the second adapter 14b, so that the second pole tab 112b and the second adapter 14b are conducted and connected. In this way, the second pole tab 112b can be better conducted and connected to the second adapter 14b.
  • a plurality of second sub-electrode tabs 112 are connected to form a plurality of fourth connection portions 1122b that are spaced apart from each other. At least a portion of each fourth connection portion 1122b is conductively connected to the second adapter 14b to form a corresponding third connection portion 1121b.
  • a plurality of spaced-apart fourth connection portions 1122b are formed by connecting through the second sub-pole ear 112, so that each fourth connection portion 1122b is conductively connected to the second adapter 14b to form a corresponding third connection portion 1121b, so that the current between the second adapter 14b and the second pole ear 112b can be more evenly distributed, thereby reducing the overcurrent temperature of the second adapter 14b, thereby reducing the risk of the second adapter 14b causing the insulation performance of the second insulating member 15b to fail.
  • the present application embodiment further provides a battery 100, the battery 100 includes a battery Cell 10.
  • the battery cell 10 in this embodiment is the same as the battery cell 10 in the previous embodiment. Please refer to the relevant description of the battery cell 10 in the previous embodiment for details, which will not be repeated here.
  • the battery 100 provided in the embodiment of the present application adopts the battery cell 10 involved above, and by distributing at least a portion of the insulating part 15 at intervals from the adapter 14, the heat conduction between the adapter 14 and the insulating part 15 can be slowed down, thereby improving the problem of heat from the adapter 14 being conducted to the insulating part 15, causing the insulation performance of the insulating part 15 to fail.
  • the insulating part 15 can achieve a good insulation effect between the adapter 14 and the outer shell 12, so that the battery 100 has higher reliability.
  • an embodiment of the present application further provides an electric device, which includes a battery cell 10 or a battery 100.
  • the battery cell 10 and the battery 100 in this embodiment are the same as the battery cell 10 and the battery 100 in the previous embodiment.
  • the electrical device provided in the embodiment of the present application adopts the battery cell 10 or battery 100 involved above.
  • the heat conduction between the adapter 14 and the insulating part 15 can be slowed down, thereby improving the problem of heat on the adapter 14 being conducted to the insulating part 15, causing the insulating performance of the insulating part 15 to fail.
  • the insulating part 15 can achieve a good insulation effect between the adapter 14 and the outer shell 12, so that the battery 100 or the battery cell 10 has higher reliability.
  • a battery cell 10 includes a housing 12, an electrode assembly 11, a first electrode terminal 13a, a second electrode terminal 13b, a first adapter 14a, a second adapter 14b, a first insulating member 15a, and a second insulating member 15b.
  • the electrode assembly 11, the first adapter 14a, the second adapter 14b, the first insulating member 15a, and the second insulating member 15b are all disposed in the housing 12.
  • the electrode assembly 11 includes a main body 111, a first pole tab 112a, and a second pole tab 112b, and the first pole tab 112a and the second pole tab 112b are disposed at opposite ends of the main body 111 along a first direction Z.
  • Two opposite walls of the housing 12 along the first direction Z are respectively a first wall 122a and a second wall 122b, and the first electrode terminal 13a is disposed on the first wall 122a, and the second electrode terminal 13b is disposed on the second wall 122b.
  • the first adapter 14a is provided at the first pole lug 112a, and at least a portion of the first insulating member 15a is located between the first adapter 14a and the first wall 122a.
  • the second adapter 14b is provided at the second pole lug 112b, and at least a portion of the second insulating member 15b is located between the second adapter 14b and the second wall 122b.
  • the first adapter 14a is welded to the first pole lug 112a, and the first adapter 14a is welded to the first electrode terminal 13a.
  • the second adapter 14b is welded to the second pole lug 112b, and the second adapter 14b is welded to the second electrode terminal 13b.
  • at least a portion of the first insulating member 15a is spaced apart from the first adapter 14a, and at least a portion of the second insulating member 15b is spaced apart from the second adapter 14b.
  • the first adapter 14a is provided with a positioning hole 1401, and the first electrode terminal 13a is inserted into the positioning hole 1401 along the first direction Z.
  • the weld mark formed by welding the first electrode tab 112a and the first adapter 14a and the positioning hole 1401 are arranged at intervals.
  • the first wall 122 a is provided with a liquid injection hole 1201 , and a weld mark formed by welding the first adapter 14 a and the first electrode tab 112 a is located at a side of the first electrode terminal 13 a away from the liquid injection hole 1201 .
  • the weld marks formed by welding the second adapter 14b and the second electrode tab 112b are disposed on opposite sides of the second electrode terminal 13b. Specifically, at least a portion of the second electrode terminal 13b is located between two weld marks formed by welding the second adapter 14b and the second electrode tab 112b.

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Abstract

本申请适用于电池(100)技术领域，提供一种电池单体(10)、电池(100)及用电装置，用电装置包括电池(100)，电池(100)包括电池单体(10)，电池单体(10)包括外壳(12)、电极组件(11)、电极端子(13)、转接件(14)和绝缘件(15)。电极组件(11)设于外壳(12)内。转接件(14)设于外壳(12)内，且导通连接于电极组件(11)和电极端子(13)。绝缘件(15)设于外壳(12)内，且至少部分位于转接件(14)与外壳(12)之间，绝缘件(15)的至少部分与转接件(14)间隔分布。通过绝缘件(15)的至少部分与转接件(14)间隔分布设置，可以改善转接件(14)的热量传导至绝缘件(15)致使绝缘件(15)的绝缘性能失效的问题。

Description

电池单体、电池及用电装置
交叉引用
本申请要求于2023年08月11日在中华人民共和国国家知识产权局提交的、申请号为202311017397.0、申请名称为“电池单体、电池及用电装置”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，具体涉及一种电池单体、电池及用电装置。
背景技术
相关技术中，电池单体包括外壳、电极组件、电极端子、转接件和绝缘件。其中，电极组件、转接件和绝缘件均设置于外壳内，电极端子设置于外壳。转接件分别与电极组件的极耳、电极端子焊接，以实现电极组件和电极端子之间的导通。绝缘件用于实现转接件和外壳之间、电极组件和外壳之间的绝缘。
在一些情况下，转接件过流时、转接件和极耳焊接时、转接件和电极端子焊接时均会产生热量，该热量会传导至绝缘件，存在绝缘件被熔融致使绝缘件的绝缘性能失效的风险。
发明内容
鉴于上述问题，本申请实施例的目的在于：提供一种电池单体、电池及用电装置，能够改善绝缘件存在被熔融致使绝缘性能失效的技术问题。
本申请实施例采用的技术方案是：
第一方面，本申请实施例提供了一种电池单体，包括：
外壳；
电极组件，设于外壳内；
电极端子，设置于外壳；
转接件，设于外壳内，且导通连接于电极组件和电极端子；
绝缘件，设置于外壳内，且至少部分位于外壳与转接件之间，绝缘件的至少部分与转接件间隔分布。
本申请实施例提供的电池单体，通过绝缘件的至少部分与转接件间隔分布设置，可以减缓转接件和绝缘件之间的热量传导，进而可以改善转接件上的热量传导至绝缘件致使绝缘件的绝缘性能失效的问题，如此使得绝缘件可以良好地实现转接件和外壳之间的绝缘效果。
在一些实施例中，转接件设置于电极组件沿第一方向的端部；绝缘件包括本体部，沿第一方向，本体部位于转接件和外壳之间，且与转接件沿第一方向间隔分布。
如此设置，使得绝缘件可以实现外壳和转接件之间的绝缘，且绝缘件的本体部还能够与转接件间隔布置，以减缓热量在转接件和本体部之间的传导，从而可以改善本体部的绝缘性能失效的问题。
在一些实施例中，绝缘件还包括第一凸台，第一凸台设置于本体部沿第一方向朝向电极组件的一侧；转接件与第一凸台沿第二方向间隔分布，第二方向与第一方向交叉。
通过采用上述技术方案，使得转接件不仅与绝缘件的本体部间隔分布，还与绝缘件的第一凸台间隔分布，这样可以较佳地减缓热量在转接件和绝缘件之间的传导，以能够改善转接件的热量致使绝缘件的绝缘性能失效的问题，具体包括绝缘件的本体部的绝缘性能失效、第一凸台的绝缘性能失效的问题。
在一些实施例中，外壳沿第一方向的壁开设有注液孔，绝缘件还包括凸柱，凸柱设置于本体部沿第一方向朝向电极组件的一侧；凸柱连通于注液孔，且与外壳内连通；转接件与凸柱沿第二方向间隔分布，第二方向与第一方向交叉。
通过采用上述技术方案，使得转接件不仅与绝缘件的本体部间隔分布，还与绝缘件的 凸柱间隔分布，这样可以较佳地减缓热量在转接件和绝缘件之间的传导，以能够改善转接件的热量致使绝缘件的绝缘性能失效的问题。
在一些实施例中，绝缘件的至少部分与转接件间隔形成的间隙大于0.1mm。
如此设置，使得绝缘件的至少部分与转接件之间具有较大的间隙，从而可以减缓热量在转接件和绝缘件之间的传导，进而可以便于改善转接件的热量导致绝缘件的绝缘性能失效的问题。
在一些实施例中，绝缘件的至少部分与转接件的间隔形成的间隙小于2mm。
这样，在能够改善转接件的热量致使绝缘件的绝缘性能失效的问题的基础上，还可以提高转接件和绝缘件的分布紧凑性，从而有助于实现电池单体的结构紧凑性能，以提高电池单体的能量密度。
在一些实施例中，电极组件与转接件焊接。
通过电极组件与转接件焊接，可以实现电极组件和转接件的导通连接，以实现电极组件与电极端子之间的转接。
在一些实施例中，转接件用于与电极组件的位置与绝缘件间隔设置。
通过转接件用于与电极组件焊接的部分与绝缘件间隔设置，可以减缓电极组件和转接件在焊接过程中产生的热量传导至绝缘件的速度，从而可以改善绝缘件的绝缘性能失效的问题。
在一些实施例中，转接件开设有定位孔，电极端子插接于定位孔。
通过电极端子插接于定位孔，便于电极端子在电池单体上的定位，还便于实现电极端子和转接件的导通连接。
在一些实施例中，电极组件与转接件焊接，且电极组件与转接件焊接形成的焊印与定位孔间隔分布。
如此设置，可以改善极耳与转接件焊接过程中使用到的焊料流入定位孔的问题，进而可以改善极耳与转接件的焊接工艺会干涉定位孔对电极端子的定位功能的问题，从而便于电池单体的装配。
在一些实施例中，电极组件包括主体部和设于主体部的极耳；极耳包括多个子极耳，多个子极耳焊接形成第一焊印，第一焊印的至少部分与转接件焊接形成第二焊印，第二焊印与定位孔间隔分布。
这样可以改善极耳与转接件焊接过程中使用到的焊料流入定位孔的问题，进而可以改善极耳与转接件的焊接工艺会干涉定位孔对电极端子的定位功能的问题，从而便于电池单体的装配。并且，通过极耳的多个子极耳焊接形成第一焊印，便于极耳与转接件进行焊接操作。
在一些实施例中，多个子极耳焊接，且与转接件焊接形成第一焊印，第一焊印与定位孔间隔分布。
如此设置，使得多个子极耳焊接的过程中，还与转接件进行焊接，如此增加了极耳与转接件焊接的次数，可以提高转接件与极耳的导通强度。并且，第一焊印也与定位孔间隔分布，使得子极耳与转接件焊接过程中，焊料也不易流入定位孔内，从而可以改善极耳与转接件的焊接工艺会干涉定位孔对电极端子的定位功能的问题，从而便于电池单体的装配。
在一些实施例中，电极组件与转接件焊接形成的焊印与定位孔的最小间距为0.2～6mm。
如此设置，使得电极组件与转接件焊接形成的焊印与定位孔的最小间距具有合适的范围，一方面可以改善电极组件与转接件焊接过程中的焊料流入定位孔内的问题，从而可以改善电极组件与转接件的焊接工艺干涉定位孔对电极端子的定位操作的问题。另一方面，使得电极组件与转接件焊接形成的焊印、定位孔等可以紧凑地分布于转接件，如此可以减小转接件的尺寸。
在一些实施例中，电极组件包括主体部和设于所述主体部的极耳；极耳包括第一极耳，电极端子包括第一电极端子，转接件包括第一转接件，绝缘件包括第一绝缘件；第一转接 件导通连接于第一极耳和第一电极端子，第一绝缘件的至少部分位于第一转接件与外壳之间，第一绝缘件的至少部分与第一转接件间隔分布；
第一转接件与第一极耳导通连接，以形成多个间隔分布的第一连接部。
这样，一方面，使得第一转接件和第一极耳之间的电流分布可以更加均匀，如此可以降低第一转接件的过流温度，以改善第一转接件的电流集中致使热量集中的问题，进而可以改善第一转接件的热量过高致使绝缘件的绝缘性能失效的问题。另一方面，可以使得第一转接件和第一极耳之间具有较大的过流能力。
在一些实施例中，外壳开设有注液孔，多个第一连接部设于第一电极端子远离注液孔的一侧。
通过第一连接部位于第一电极端子远离注液孔的一侧，使得第一转接件可以尽可能地远离注液孔设置，这样，能够使得第一转接件不会干涉注液孔的工作。
在一些实施例中，外壳沿第一方向的其中一侧设有第一壁，第一电极端子和注液孔间隔设于第一壁。
通过第一电极端子和注液孔设置于外壳沿第一方向的同一个壁上，利于提高电池单体的结构紧凑性。
在一些实施例中，第一极耳包括多个第一子极耳，多个第一子极耳连接形成第二连接部，第二连接部的至少部分与第一转接件导通连接形成第一连接部。
如此设置，能够使得第一极耳较好地与第一转接件导通连接。
在一些实施例中，极耳还包括第二极耳，电极端子还包括第二电极端子，转接件还包括第二转接件，绝缘件还包括第二绝缘件；第二转接件导通连接于第二极耳和第二电极端子，第二绝缘件的至少部分位于第二转接件和外壳之间，第二绝缘件的至少部分与第二转接件间隔分布。
如此设置，使得各转接件与外壳之间都可以设置有绝缘件，从而可以实现各转接件与外壳之间的绝缘。
在一些实施例中，极耳还包括第二极耳，电极端子还包括第二电极端子，转接件还包括第二转接件，第二转接件导通连接于第二极耳和第二电极端子；第二极耳与第二转接件导通连接，以形成多个间隔分布的第三连接部。
这样，一方面，使得第二转接件和第二极耳之间的电流分布可以更加均匀，如此可以降低第二转接件的过流温度，以改善第二转接件的电流集中致使热量集中的问题，进而可以改善第二转接件的热量过高致使绝缘件的绝缘性能失效的问题。另一方面，可以使得第二转接件和第二极耳之间具有较大的过流能力。
在一些实施例中，第二电极端子的至少部分位于两个第三连接部之间。
如此设置，使得第二转接件的用于与第二极耳连接的多个位置更加分散开，可以使得电池单体内部的电流更加均匀，从而可以降低第二转接件的过流温度，进而可以降低第二转接件致使绝缘件的绝缘性能失效的风险。
在一些实施例中，第二极耳包括多个第二子极耳，多个第二子极耳连接形成第四连接部，第四连接部的至少部分与第二转接件导通连接形成第三连接部。
如此设置，能够使得第二极耳较好地与第二转接件导通连接。
在一些实施例中，多个第二子极耳连接形成多个间隔分布的第四连接部，各第四连接部的至少部分与第二转接件导通连接形成对应的第三连接部。
通过第二子极耳连接形成多个间隔分布的第四连接部，以使各第四连接部与第二转接件导通连接形成对应的第三连接部，使得第二转接件和第二极耳之间的电流可以更加均匀地分布，从而可以降低第二转接件的过流温度，从而可以降低第二转接件致使绝缘件的绝缘性能失效的风险。
第二方面，本申请实施例提供了一种电池，包括电池单体。
本申请实施例提供的电池，通过采用了以上涉及的电池单体，通过绝缘件的至少部分 与转接件间隔分布设置，可以减缓转接件和绝缘件之间的热量传导，进而可以改善转接件上的热量传导至绝缘件致使绝缘件的绝缘性能失效的问题，如此使得绝缘件可以良好地实现转接件和外壳之间的绝缘效果，使得电池具有较高的可靠性。
第三方面，本申请实施例提供了一种用电装置，包括电池单体或电池。
本申请实施例提供的用电装置，通过采用了以上涉及的电池单体或电池，通过绝缘件的至少部分与转接件间隔分布设置，可以减缓转接件和绝缘件之间的热量传导，进而可以改善转接件上的热量传导至绝缘件致使绝缘件的绝缘性能失效的问题，如此使得绝缘件可以良好地实现转接件和外壳之间的绝缘效果，使得电池单体或电池具有较高的可靠性。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本申请一些实施例提供的车辆的示意图；
图2为本申请一些实施例提供的电池的分解示意图；
图3为本申请一些实施例提供的电池单体的剖视图；
图4为图3中A处的放大图；
图5为本申请一些实施例提供的电池单体的端盖和绝缘件的配合示意图；
图6为图3提供的电池单体的第一转接件和端盖的配合俯视图；
图7为图3提供的电池单体的第二转接件的示意图。
其中，图中各附图标记：
1000-车辆；100-电池；200-控制器；300-马达；10-电池单体；20-箱体；21-第一部分；
22-第二部分；11-电极组件；111-主体部；112-极耳；112a-第一极耳；1121a-第一连接部；1122a-第二连接部；112b-第二极耳；1121b-第三连接部；1122b-第四连接部；12-外壳；1201-注液孔；121-壳体；122-端盖；122a-第一壁；122b-第二壁；13-电极端子；13a-第一电极端子；13b-第二电极端子；14-转接件；1401-定位孔；14a-第一转接件；14b-第二转接件；15-绝缘件；1501-通孔；15a-第一绝缘件；15b-第二绝缘件；151-本体部；152-第一凸台；153-凸柱；154-第二凸台；H1-第一间隙；H2-第二间隙；H3-第三间隙；H4-第一间距；H5-第二间距；Z-第一方向；X-第二方向；Y-第三方向。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。
在本申请的描述中，“多个”的含义是两个以上，除非另有明确具体的限定，“两个以上”包含两个。相应地，“多组”的含义是两组以上，包含两组。
在本申请的描述中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请的描述中，术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：存在A，同时存在A和B，存在B这三种情况。另外，本申请中，字符“/”，一般表示前后关联对象是一种“或”的关系。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。
相关技术中，电池单体通常可以包括外壳、电极组件、电极端子和转接件，电极组件和转接件均设置于外壳限定出的内部环境，电极端子设置于外壳。转接件分别与电极组件的极耳、电极端子焊接，以实现电极组件和电极端子之间的导通。这样，转接件可以在电极组件和电极端子之间实现过流。
并且，电池单体还包括设置于外壳内的绝缘件，绝缘件至少可以用于实现转接件和外壳之间的绝缘，还可以用于实现电极组件和外壳之间的绝缘。
在一些情况下，转接件过流时会产生热量，且转接件过流时产生的热量会传导至绝缘件，因而在电池单体长期使用下，存在绝缘件被熔融致使绝缘件的绝缘性能失效的风险。特别是当电池单体发生短路时，转接件内部的电流急剧增大，能量急剧释放，则转接件内部的温度发生剧增，十分容易将热量传导至绝缘件致使绝缘件的绝缘性能失效，进而导致电池单体内部发生短路。
在一些情况下，在转接件和极耳焊接、转接件和电极端子焊接等焊接操作下，也会产生较大的热量，该热量会传导至绝缘件，存在绝缘件被熔融致使绝缘件的绝缘性能失效的风险，进而会导致电池单体内部发生短路。
因此，转接件上的热量会传导至绝缘件，使得绝缘件存在被转接件熔融致使绝缘性能失效的风险。
基于以上考虑，本申请实施例提供了一种电池单体、电池及用电装置，通过绝缘件的至少部分与转接件间隔分布设置，可以减缓转接件和绝缘件之间的热量传导，进而可以改善转接件上的热量传导至绝缘件致使绝缘件的绝缘性能失效的问题，如此使得绝缘件可以良好地实现转接件和外壳之间的绝缘效果。
在一些实施例中，本申请实施例涉及的电池单体可以用于使用电池单体或电池作为电源的用电装置，本申请实施例涉及的电池可以用于使用电池作为电源的用电装置。
用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。车辆可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。
在一些实施例中，本申请实施例涉及的电池单体和电池也可以用于储能装置。其中，储能装置可以是储能集装箱、储能电柜等。
本申请实施例涉及的电池可以是包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。电池单体有多个时，多个电池单体通过汇流部件串联、并联或混联，混联是指多个电池单体中既有串联又有并联。
在一些实施例中，电池可以为电池模块。电池单体有多个时，多个电池单体排列并固定形成一个电池模块。作为一个示例，多个电池单体可以通过轧带等固定形成电池模块。 作为一个示例，多个电池单体还可以通过端板、侧板等固定形成电池模块。
在一些实施例中，电池可以为电池包，电池包可以包括箱体和电池单体。作为一个示例，电池单体可直接容纳于箱体中。作为一个示例，电池单体也可先形成电池模块，然后再容纳于箱体中。
为便于描述，本申请实施例以用电装置为车辆为例进行说明。
请参阅图1，图1为本申请一些实施例提供的车辆1000的示意图。车辆1000的内部设置有上述电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如用于车辆1000的启动、导航和行驶时的工作用电需求。
在一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参阅图2，图2为本申请一些实施例提供的电池100的分解图。电池100包括箱体20和多个电池单体10。箱体20为内部具有容纳空间的结构，箱体20可以采用多种结构。在一些实施例中，箱体20可以包括第一部分21和第二部分22，第一部分21和第二部分22相互盖合，并共同限定出上述容纳空间。其中，第一部分21可以是一端具有开口的空心结构，第二部分22为板状结构，第二部分22盖合于第一部分21的开口侧，以使第一部分21和第二部分22共同限定出上述容纳空间；或者，第一部分21和第二部分22均可以是一端具有开口的空心结构，如图2所示，第一部分21的开口侧盖合于第二部分22的开口侧，以使第一部分21和第二部分22共同限定出上述容纳空间。其中，第一部分21和第二部分22组成的箱体20可以是多种形状，比如圆柱体、长方体等。
在一些实施例中，多个电池单体10可以通过串联、并联或混联形成一个整体，然后将多个电池单体10形成的整体直接容纳于箱体20的上述容纳空间中，如图2所示。多个电池单体10也可以先串联、并联或混联，并排列固定形成多个电池模块，多个电池模块再串联、并联或混联形成一个整体，并容纳于箱体20的上述容纳空间中。
在一些实施例中，请结合图1和图2，当电池100应用于车辆1000时，电池100的箱体20可以作为车辆1000的底盘结构的一部分。例如，箱体20的部分可以成为车辆1000的底盘的至少一部分，或者，箱体20的部分可以成为车辆1000的横梁和纵梁的至少一部分。
电池单体10是指存储和输出电能的最小单元。其中，电池单体10可以为二次电池或一次电池。电池单体10可以但不限于是金属电池、锂硫电池、钠离子电池或镁离子电池。电池单体10可呈圆柱体、扁平体、长方体或其它形状等。
请参阅图3，图3为本申请一些实施例提供的电池单体10的剖视图。电池单体10可以包括电极组件11和外壳12。
电极组件11是电池单体10中发生电化学反应的部件。其中，电极组件11主要由正极极片和负极极片卷绕或层叠放置形成，且正极极片和负极极片之间设有隔膜。正极极片和负极极片具有活性物质的部分构成电极组件11的主体部111，正极极片和负极极片不具有活性物质的部分各自构成极耳112。正极极片的极耳112为正极极耳，负极极片的极耳112为负极极耳，正极极耳和负极极耳可以共同位于主体部111的一端或是分别位于主体部111的相对两端。
电池单体10中，电极组件11的数量可以是一个，也可以是多个。
在一些场合中，电极组件11也可被称为是裸电芯、卷绕体、层叠体等。
在一些实施例中，电池单体10还可以包括电解质，电解质在正极极片和负极极片之间起到传导离子的作用。本申请实施例涉及的电解质可以是液态的、凝胶态的或固态的。
外壳12可以包括壳体121和端盖122，壳体121和端盖122是用于共同限定出电池单体10的内部环境的部件，壳体121和端盖122限定出的内部环境用于容纳电极组件11和 电解质。其中，壳体121和端盖122可以是独立的部件，具体地，壳体121具有开口，端盖122盖设于壳体121的开口处，以与壳体121共同限定出电池单体10的内部环境，且使电池单体10的内部环境隔绝于外部环境。壳体121和端盖122也可以是一体化的结构，具体地，端盖122和壳体121之间可以在电极组件11入壳前形成一个共同的连接面，当电极组件11入壳后，需要封装电极组件11时，再使端盖122盖合壳体121。
其中，端盖122的数量可以是一个。端盖122的数量也可以是两个，两个端盖122分别设于壳体121的相对两端。
其中，壳体121可以是圆柱形、方形等形状，具体可以根据电极组件11的具体形状和大小来确定。并且，壳体121和端盖122的材质也可以是多种，比如铜、铁、铝、不锈钢、铝合金、塑胶等。
在一些实施例中，请继续参阅图3，电池单体10还可以包括电极端子13。电极端子13是指具有导电性能的部件，电极端子13作为电池单体10的电流传输端，以用于传输电流。其中，电极端子13可以但不限于是极柱。
电极端子13与极耳112导通连接。具体地，电极端子13可以与极耳112直接导通连接，例如焊接。电极端子13和极耳112之间也可以设置转接件14，转接件14实现电极端子13和极耳112之间的转接，以能够过流，从而间接地实现电极端子13和极耳112之间的导通连接。
其中，转接件14是指具有导电性能的金属结构，例如可以但不限于是铜排。其中，转接件14设于外壳12内。
电极端子13为两个，两个电极端子13分别为正极电极端子和负极电极端子，正极电极端子与正极极耳导通连接，负极电极端子与负极极耳导通连接。
电极端子13设置于外壳12，具体地，电极端子13可以设置于外壳12的壳体121，也可以设置于外壳12的端盖122。例如，正极电极端子和负极电极端子可以同时设置于壳体121；或者，如图3所示，正极电极端子和负极电极端子同时设置于端盖122；或者，正极电极端子和负极电极端子中的其中一个设置于壳体121，另一个设置于端盖122。
其中，正极电极端子和负极电极端子可以设置于外壳12的同一端；或者，如图3所示，正极电极端子和负极电极端子可以分设于外壳12的相对两端。
在一些实施例中，请参阅图3，电池单体10还可以包括下塑胶。下塑胶为塑胶件，主要是用于设置在电池单体10的内部环境以起到绝缘性能的部件。
下塑胶设置于外壳12内，且设置于电极组件11具有极耳112的端部，以可以实现外壳12与转接件14之间的绝缘，还可以实现外壳12与电极组件11之间的绝缘。
下塑胶可以有两个，其中一个下塑胶设置于电极组件11具有正极极耳的一侧，另一个下塑胶设置于电极组件11具有负极极耳的一侧。
下塑胶可以与外壳12连接。具体地，下塑胶可以与外壳12的壳体121连接，也可以与外壳12的端盖122连接。
请一并参阅图3和图4，且结合其他附图。其中，图4为图3中A处的放大图，图4的放大图中，主要示意出了下文涉及的第一壁122a、第一极耳112a、第一绝缘件15a、第一转接件14a之间的关系。本申请实施例提供的电池单体10包括外壳12、电极组件11、电极端子13、转接件14和绝缘件15。电极组件11设于外壳12内。转接件14设于外壳12内，且转接件14导通连接于电极组件11和电极端子13。绝缘件15设于外壳12内，绝缘件15的至少部分位于转接件14与外壳12之间，绝缘件15的至少部分与转接件14间隔分布。
转接件14导通连接于电极组件11和电极端子13，是指转接件14与电极组件11导通连接，且转接件14与电极端子13导通连接。转接件14与电极组件11导通连接，是指转接件14与电极组件11连接，且转接件14与电极组件11电性导通。转接件14与电极端子13导通连接，是指转接件14与电极端子13连接，且转接件14与电极端子13电性导通。 基于此，转接件14可以在电极组件11和电极端子13之间实现过流。其中，导通连接的方式可以包括但不限于是焊接、粘接等方式中的一个或多个。焊接可以包括但不限于是激光焊接、超声焊接、穿透焊接等方式中的一个或多个。
如图3所示，电极组件11包括主体部111和设于主体部111的极耳112，转接件14与电极组件11的极耳112导通连接。
绝缘件15是指用于实现外壳12与转接件14之间的绝缘效果的部件。绝缘件15可以是塑胶件，例如可以是上文涉及的下塑胶。绝缘件15也可以是其他具有绝缘性能的材质制成的结构件。
绝缘件15的至少部分位于转接件14与外壳12之间，使得绝缘件15的至少部分可以隔开转接件14和外壳12，从而实现转接件14和外壳12之间的绝缘。
如图3和图4所示，绝缘件15的至少部分位于外壳12沿第一方向Z的壁与转接件14之间，使得绝缘件15的至少部分可以至少沿第一方向Z隔开转接件14和外壳12沿第一方向Z的壁，从而实现转接件14和外壳12之间的绝缘。其中，图3和图4中示意出了一个平面坐标系，X轴和Z轴分别为该平面坐标系中的两个相互垂直的坐标轴，即Z轴与X轴垂直。其中，第一方向Z平行于Z轴。
在一些可能的设计中，如图3和图4所示，转接件14设置于外壳12沿第一方向Z的壁与电极组件11之间。在另一些可能的设计中，转接件14也可以设置于外壳12沿与第一方向Z交叉的方向的壁与电极组件11之间。
在一些可能的设计中，如图3和图4所示，电极端子13设置于外壳12沿第一方向Z的壁。在另一些可能的设计中，电极端子13也可以设置于外壳12沿与第一方向Z交叉的方向的壁。
外壳12沿第一方向Z的壁可以是壳体121，也可以是端盖122。其中，如图3所示，外壳12沿第一方向Z相对的两个壁可以都是端盖122；或者，外壳12沿第一方向Z相对的两个壁也可以都是壳体121；或者，外壳12沿第一方向Z的其中一个壁为壳体121，另一个壁为端盖122。
如图3所示，极耳112为两个，且两个极耳112分别为第一极耳112a和第二极耳112b。其中，作为一个示例，第一极耳112a为正极极耳，第二极耳112b为负极极耳；当然，第一极耳112a也可以为负极极耳，第二极耳112b相应为正极极耳。
在一些情况下，第一方向Z为电池单体10的长度方向或高度方向。
需要说明的是，电池单体10包括电极端子13、转接件14和绝缘件15，是指电池单体10包括至少一个电极端子13、至少一个转接件14和至少一个绝缘件15。可以理解地，电极端子13的数量、转接件14数量和绝缘件15的数量可以包括但不限于以下三种情况：第一种，电极端子13的数量、转接件14的数量和绝缘件15的数量都是一个；第二种，如图3和图4所示，电极端子13的数量、转接件14的数量和绝缘件15的数量都是两个；第三种，电极端子13的数量和转接件14的数量都是两个，且绝缘件15的数量为一个。
当电极端子13的数量、转接件14的数量和绝缘件15的数量都是一个，电极端子13可以是第一电极端子13a，则转接件14为第一转接件14a，绝缘件15为第一绝缘件15a。第一转接件14a与第一极耳112a导通连接，第一转接件14a与第一电极端子13a导通连接，且第一绝缘件15a的至少部分位于第一转接件14a和外壳12沿第一方向Z的壁之间，以实现第一转接件14a和外壳12之间的绝缘。电极端子13也可以是第二电极端子13b，则转接件14为第二转接件14b，绝缘件15为第二绝缘件15b。第二转接件14b与第二极耳112b导通连接，第二转接件14b与第二电极端子13b导通连接，且第二绝缘件15b的至少部分位于第二转接件14b和外壳12沿第一方向Z的壁之间，以实现外壳12和第二转接件14b之间的绝缘。
当电极端子13的数量、转接件14的数量和绝缘件15的数量都是两个，如图3和图4所示，两个电极端子13分别为第一电极端子13a和第二电极端子13b，两个转接件14分别 是第一转接件14a和第二转接件14b，两个绝缘件15分别为第一绝缘件15a和第二绝缘件15b。其中，第一转接件14a与第一极耳112a导通连接，第一转接件14a与第一电极端子13a导通连接。第二转接件14b与第二极耳112b导通连接，第二转接件14b与第二电极端子13b导通连接。第一绝缘件15a的至少部分位于第一转接件14a和外壳12沿第一方向Z的壁之间，以实现第一转接件14a和外壳12之间的绝缘。第二绝缘件15b的至少部分位于第二转接件14b和外壳12沿第一方向Z的壁之间，以实现外壳12和第二转接件14b之间的绝缘。
当电极端子13的数量和转接件14的数量都是两个，且绝缘件15的数量为一个，两个电极端子13分别为第一电极端子13a和第二电极端子13b，两个转接件14分别是第一转接件14a和第二转接件14b。其中，第一转接件14a与第一极耳112a导通连接，第一转接件14a与第一电极端子13a导通连接。第二转接件14b与第二极耳112b导通连接，第二转接件14b与第二电极端子13b导通连接。绝缘件15可以是第一绝缘件15a，第一绝缘件15a的至少部分位于第一转接件14a和外壳12沿第一方向Z的壁之间，以实现第一转接件14a和外壳12之间的绝缘。绝缘件15也可以是第二绝缘件15b，第二绝缘件15b的至少部分位于第二转接件14b和外壳12沿第一方向Z的壁之间，以实现外壳12和第二转接件14b之间的绝缘。
需要补充说明的是，外壳12沿第一方向Z的壁包括第一壁122a和第二壁122b。
第一绝缘件15a的至少部分位于外壳12和第一转接件14a之间，是指第一绝缘件15a的至少部分位于外壳12沿第一方向Z的壁和第一转接件14a之间，即第一绝缘件15a的至少部分沿第一方向Z位于第一壁122a和第一转接件14a之间。
第二绝缘件15b的至少部分位于外壳12和第二转接件14b之间，是指第二绝缘件15b的至少部分位于外壳12沿第一方向Z的壁和第二转接件14b之间，即第二绝缘件15b的至少部分沿第一方向Z位于第二壁122b和第二转接件14b之间。
其中，第一壁122a可以设于壳体121，也可以设于端盖122。第二壁122b可以是壳体121，也可以是端盖122。作为一个示例，如图3所示，第一壁122a和第二壁122b均设于端盖122。
在一些可能的设计中，如图3所示，上述涉及的第一壁122a和第二壁122b可以是外壳12沿第一方向Z相对的两个壁。基于此，第一极耳112a和第二极耳112b分设于电极组件11沿第一方向Z的相对两端，第一转接件14a和第二转接件14b也分设于电极组件11沿第一方向Z的相对两端，第一绝缘件15a和第二绝缘件15b也分设于电极组件11沿第一方向Z的相对两端，第一电极端子13a和第二电极端子13b也分设于电极组件11沿第一方向Z的相对两端。并且，第一绝缘件15a的至少部分沿第一方向Z位于第一壁122a和第一转接件14a之间，第二绝缘件15b的至少部分沿第一方向Z位于第二壁122b和第二转接件14b之间。
在另一些可能的设计中，第一壁122a和第二壁122b可以是外壳12沿第一方向Z的同一个壁。基于此，第一极耳112a和第二极耳112b设于电极组件11沿第一方向Z的同一端，第一转接件14a和第二转接件14b也设于电极组件11沿第一方向Z的同一端，第一绝缘件15a和第二绝缘件15b也设于电极组件11沿第一方向Z的同一端，第一电极端子13a和第二电极端子13b也设于电极组件11沿第一方向Z的同一端。
绝缘件15的至少部分与转接件14间隔分布，是指绝缘件15的至少部分与转接件14相隔开，而不直接接触。其中，绝缘件15的至少部分与转接件14之间间隔形成的空间可以由空气填充，也可由电池单体10的其他部件填充。
绝缘件15的至少部分与转接件14间隔分布，可以包括绝缘件15整体完全与转接件14间隔分布的情况；也可以包括绝缘件15的其中一部分与转接件14间隔分布，且绝缘件15的另一部分与转接件14接触的情况。
本申请实施例提供的电池单体10，通过绝缘件15的至少部分与转接件14间隔分布设 置，可以减缓转接件14和绝缘件15之间的热量传导，进而可以改善转接件14上的热量传导至绝缘件15致使绝缘件15的绝缘性能失效的问题，如此使得绝缘件15可以良好地实现转接件14和外壳12之间的绝缘效果。
可以理解地，本申请各实施例中涉及的转接件14可以是第一转接件14a，也可以是第二转接件14b；极耳112可以是第一极耳112a，也可以是第二极耳112b；电极端子13可以是第一电极端子13a，也可以是第二电极端子13b；绝缘件15可以是第一绝缘件15a，也可以是第二绝缘件15b。并且，当极耳112是第一极耳112a，则电极端子13为第一电极端子13a，转接件14为第一转接件14a，绝缘件15为第一绝缘件15a；当极耳112是第二极耳112b，则电极端子13是第二电极端子13b，转接件14是第二转接件14b，绝缘件15为第二绝缘件15b。
在一些实施例中，如图3所示，第一电极端子13a设于第一壁122a，第二电极端子13b设于第二壁122b。
在一些实施例中，请继续参阅图3和图4，绝缘件15的至少部分还可以位于外壳12沿第一方向Z的壁和电极组件11之间，以隔开电极组件11和外壳12沿第一方向Z的壁。这样，绝缘件15还可以实现电极组件11和外壳12之间的绝缘性能。
在一些实施例中，请继续参阅图3和图4，且结合其他附图。转接件14设置于电极组件11沿第一方向Z的端部。绝缘件15包括本体部151，沿第一方向Z，本体部151位于转接件14和外壳12之间，且与转接件14沿第一方向Z间隔分布。
本体部151是绝缘件15的其中一部分，本体部151也具有绝缘性能。
可以理解地，本体部151位于外壳12沿第一方向Z的壁和转接件14之间，以能够实现转接件14和外壳12之间的绝缘。
基于转接件14设置于电极组件11沿第一方向Z的端部，且本体部151位于外壳12沿第一方向Z的壁和转接件14之间的设置，使得转接件14和本体部151沿第一方向Z间隔分布，转接件14设置于外壳12沿第一方向Z的壁和电极组件11之间，电极组件11设置于转接件14沿第一方向Z远离本体部151的一侧。基于此，转接件14位于本体部151沿第一方向Z朝向电极组件11的一侧。
其中，绝缘件15可以是第一绝缘件15a，也可以是第二绝缘件15b。即，第一绝缘件15a和第二绝缘件15b都可以包括本体部151。
需要说明的是，如图4所示，图4主要示意出了下文涉及的第一壁122a、第一极耳112a、第一绝缘件15a、第一转接件14a之间的位置关系。第一绝缘件15a的本体部151位于外壳12沿第一方向Z的壁和第一转接件14a之间，即，第一绝缘件15a的本体部151位于外壳12沿第一方向Z靠近第一转接件14a的壁和第一转接件14a之间，即，第一绝缘件15a的本体部151沿第一方向Z位于外壳12的第一壁122a和第一转接件14a之间。并且，第一绝缘件15a的本体部151与第一转接件14a沿第一方向Z间隔布置。
还需要说明的是，第二绝缘件15b的本体部151位于外壳12沿第一方向Z的壁和第二转接件14b之间，即，第二绝缘件15b的本体部151位于外壳12沿第一方向Z具有第二转接件14b的壁和第二转接件14b之间，即，第二绝缘件15b的本体部151沿第一方向Z位于外壳12的第二壁122b和第二转接件14b之间。并且，第二绝缘件15b的本体部151与第二转接件14b沿第一方向Z间隔布置。
如此设置，使得绝缘件15可以实现外壳12和转接件14之间的绝缘，且绝缘件15的本体部151还能够与转接件14间隔布置，以减缓热量在转接件14和本体部151之间的传导，从而可以改善本体部151的绝缘性能失效的问题。
在一些实施例中，请一并参阅图3至图5，且结合其他附图。其中，图5为本申请一些实施例提供的电池单体10的端盖122、第一绝缘件15a和第一电极端子13a的配合示意图。绝缘件15还包括第一凸台152，第一凸台152设置于本体部151沿第一方向Z朝向电极组件11的一侧。转接件14与第一凸台152沿第二方向X间隔分布，第二方向X与第一 方向Z交叉。
第一凸台152是指设置于本体部151沿第一方向Z朝向电极组件11的一侧的部件，为绝缘件15的其中一部分，也具有绝缘性能。其中，第一凸台152用于约束包覆于电极组件11外的隔离膜，以在一定程度上保障隔离膜对电极组件11和外壳12之间的绝缘效果。
需要说明的是，在第一方向Z上，第一绝缘件15a的本体部151位于外壳12的第一壁122a与第一转接件14a之间，使得第一转接件14a位于第一绝缘件15a的本体部151沿第一方向Z朝向电极组件11的一侧。基于此，第一绝缘件15a的第一凸台152和第一转接件14a均设于第一绝缘件15a的本体部151沿第一方向Z朝向电极组件11的一侧，且第一绝缘件15a的第一凸台152和第一转接件14a沿第二方向X间隔分布。
还需要说明的是，在第一方向Z上，第二绝缘件15b的本体部151位于外壳12的第二壁122b与第二转接件14b之间，使得第二转接件14b位于第二绝缘件15b的本体部151沿第一方向Z朝向电极组件11的一侧。基于此，第二绝缘件15b的第一凸台152和第二转接件14b均设于第二绝缘件15b的本体部151沿第一方向Z朝向电极组件11的一侧，且第二绝缘件15b的第一凸台152和第一转接件14a沿第二方向X间隔分布。
其中，交叉是指不平行。交叉的两个方向不平行，也即是两个方向形成大于0°且小于180°的夹角。两个方向可以垂直，也可以不垂直，两个方向也可以分别设于互为异面的两个平面上，也可以设于同一个平面上。
第二方向X是指与第一方向Z交叉的方向。具体地，第二方向X与第一方向Z交叉，是指第二方向X与第一方向Z不平行，也即是第一方向Z和第二方向X可以形成大于0°且小于180°的夹角。其中，第一方向Z和第二方向X可以相互垂直，也可以不垂直。第一方向Z和第二方向X可以是位于同一个平面上相交的方向，也可以是分别互为异面的平面上的方向，且第二方向X在第一方向Z所在的平面上的投影可以与第一方向Z相交。
其中，图5中示意出了一个空间坐标系，X轴、Y轴和Z轴为该空间坐标系中的三个两两垂直的坐标轴，即X轴与Y轴垂直，X轴与Z轴垂直，Y轴与Z轴垂直。其中，图3和图4中示意的平面坐标系为图5中的空间坐标系的X轴与Z轴构成的平面坐标系。
作为一个示例，如图3和图4所示，第二方向X与X轴平行，即第二方向X与第一方向Z垂直。
通过采用上述技术方案，使得转接件14不仅与绝缘件15的本体部151间隔分布，还与绝缘件15的第一凸台152间隔分布，这样可以较佳地减缓热量在转接件14和绝缘件15之间的传导，以能够改善转接件14的热量致使绝缘件15的绝缘性能失效的问题，具体包括绝缘件15的本体部151的绝缘性能失效、第一凸台152的绝缘性能失效的问题。
在一些实施例中，请继续参阅图3至图5，且结合其他附图。外壳12沿第一方向Z的壁开设有注液孔1201。绝缘件15还包括凸柱153，凸柱153设置于本体部151沿第一方向Z朝向电极组件11的一侧。凸柱153连通于注液孔1201，且与外壳12内连通。转接件14与凸柱153沿第二方向X间隔分布，第二方向X与第一方向Z交叉。
注液孔1201是指设置于外壳12上的用于供电解质进入电池单体10的内部环境的开孔。具体地，注液孔1201开设于外壳12沿第一方向Z的壁。其中，注液孔1201可以开设于外壳12的壳体121，也可以开设于外壳12的端盖122。
凸柱153是指设置于本体部151沿第一方向Z朝向电极组件11的一侧的部件，为绝缘件15的其中一部分，也具有绝缘性能。
可以理解地，绝缘件15开设有通孔1501，通孔1501沿第一方向Z贯通绝缘件15的本体部151和凸柱153。通孔1501连通于电池单体10的内部环境，且于注液孔1201连通。并且，注液孔1201用于与电池单体10的外部环境连通。这样，外部的电解质可以依次通过注液孔1201和通孔1501进入电池单体10的内部环境，从而可以浸润电极组件11。
如图3所示，注液孔1201和通孔1501沿第一方向Z依次分布，且依次连通设置。
凸柱153的作用有多种，例如，在一些可能的设计中，凸柱153可以用于对通过注液 孔1201的电解质起缓冲作用，以改善电解质的压力过大致使电极组件11受损的问题。例如，在一些可能的设计中，凸柱153可以用于对通过注液孔1201的电解质起到导向作用，以供电解质更快地进入电极组件11。
需要说明的是，如图3至图5所示，在第一方向Z上，本体部151位于外壳12沿第一方向Z具有转接件14的壁与转接件14之间，使得转接件14位于本体部151沿第一方向Z朝向电极组件11的一侧。基于此，凸柱153和转接件14均设于本体部151沿第一方向Z朝向电极组件11的一侧，且凸柱153和转接件14沿第二方向X间隔分布。
作为一个示例，如图3至图5所示，第一极耳112a为正极极耳，注液孔1201开设于外壳12沿第一方向Z具有第一绝缘件15a的壁，也即是注液孔1201开设于第一壁122a。第一绝缘件15a还包括凸柱153，第一绝缘件15a的凸柱153和第一转接件14a均设于第一绝缘件15a的本体部151沿第一方向Z朝向电极组件11的一侧，且第一绝缘件15a的凸柱153与第一转接件14a沿第二方向X间隔布置。
通过采用上述技术方案，使得转接件14不仅与绝缘件15的本体部151间隔分布，还与绝缘件15的凸柱153间隔分布，这样可以较佳地减缓热量在转接件14和绝缘件15之间的传导，以能够改善转接件14的热量致使绝缘件15的绝缘性能失效的问题。
在此需要补充说明的是，如图3至图5所示，第一凸台152和凸柱153沿第二方向X间隔分布。
在一些实施例中，请继续参阅图3至图5，绝缘件15还可以包括第二凸台154，第二凸台154设置于本体部151沿第一方向Z朝向电极组件11的一侧。并且，在第二方向X上，第二凸台154设置于凸柱153远离第一凸台152的一端。
在一些实施例中，请继续参阅图3，外壳12沿第一方向Z具有第二绝缘件15b的壁可以没有设置注液孔1201，也即是第二壁122b没有设置注液孔1201。此时，绝缘件15可以不设置凸柱153和第二凸台154。即，第二转接件14b沿第二方向X的其中一端或相对两端都可以设有上述第一凸台152，且在第二方向X上，第二转接件14b相对两端的第一凸台152都与第二转接件14b沿第二方向X间隔分布。
可以理解地，绝缘件15的至少部分与转接件14间隔分布，可以包括绝缘件15的本体部151沿第一方向Z与转接件14间隔分布，也可以包括绝缘件15的第一凸台152与转接件14沿第二方向X间隔分布，还可以包括绝缘件15的凸柱153与转接件14沿第二方向X间隔分布。
在一些实施例中，绝缘件15的其中一部分与转接件14间隔分布，该“绝缘件15的其中一部分”可以包括上述本体部151、第一凸台152、凸柱153中的至少一个；绝缘件15的另一部分与转接件14接触，即，绝缘件15还具有用于与转接件14接触的部分。其中，绝缘件15用于与转接件14接触的部分可以沿第一方向Z、第二方向X、第三方向Y中的至少一个方向与转接件14接触。
作为一个示例，绝缘件15用于与转接件14接触的部分可以沿第一方向Z插接于转接件14内，且与转接件14沿第一方向Z、第二方向X、第三方向Y中的至少一个方向接触于转接件14，以实现绝缘件15与转接件14之间的定位。
作为一个示例，绝缘件15用于与转接件14接触的部分可以位于转接件14沿第三方向Y的侧方，且沿第三方向Y接触于转接件14，以实现转接件14和绝缘件15在第三方向Y上的限位。
其中，第三方向Y与第一方向Z交叉，第三方向Y与第二方向X交叉。该交叉的含义可以参考第一方向Z与第二方向X交叉的解释，在此不一一赘述。作为一个示例，第三方向Y平行于Y轴。
在一些实施例中，请继续参阅图3至图5，且结合其他附图。绝缘件15的至少部分与转接件14的间隔形成的间隙大于0.1mm。
其中，绝缘件15的至少部分与转接件14间隔布置，且间隔形成间隙，该间隙大于 0.1mm。
在一些可能的设计中，绝缘件15的本体部151与转接件14沿第一方向Z间隔布置，以间隔形成第一间隙H1，第一间隙H1大于0.1mm。
在一些可能的设计中，绝缘件15的第一凸台152与转接件14沿第二方向X间隔分布，且间隔形成第二间隙H2，第二间隙H2大于0.1mm。
在一些可能的设计中，绝缘件15的凸柱153与转接件14沿第二方向X间隔分布，且间隔形成第三间隙H3，第三间隙H3大于0.1mm。
基于此，绝缘件15的至少部分与转接件14的间隔形成的间隙大于0.1mm，可以包括以上三种可能的设计中的至少一种。
如此设置，使得绝缘件15的至少部分与转接件14之间具有较大的间隙，从而可以减缓热量在转接件14和绝缘件15之间的传导，进而可以便于改善转接件14的热量导致绝缘件15的绝缘性能失效的问题。
在一些实施例中，请一并参阅图3至图5，且结合其他附图。绝缘件15的至少部分与转接件14间隔形成的间隙小于2mm。
可以理解地，绝缘件15的至少部分与转接件14间隔形成的间隙大于0.1mm且小于2mm，可以为0.2mm、0.5mm、0.8mm、1mm、1.2mm、1.4mm、1.5mm、1.8mm、1.9mm等。
在一些可能的设计中，第一间隙H1小于2mm。
在一些可能的设计中，第二间隙H2小于2mm。
在一些可能的设计中，第三间隙H3小于2mm。
基于此，绝缘件15的至少部分与转接件14的间隔形成的间隙小于2mm，可以包括以上三种可能的设计中的至少一种。
如此设置，使得绝缘件15的至少部分与转接件14之间具有较大的间隙，且不至于过大。这样，在能够改善转接件14的热量致使绝缘件15的绝缘性能失效的问题的基础上，还可以提高转接件14和绝缘件15的分布紧凑性，从而有助于实现电池单体10的结构紧凑性能，以提高电池单体10的能量密度。
在一些实施例中，电极组件11与转接件14焊接。
具体地，电极组件11的极耳112与转接件14焊接。
具体地，第一极耳112a与第一转接件14a焊接，第二极耳112b与第二转接件14b焊接。
通过电极组件11与转接件14焊接，可以实现电极组件11和转接件14的导通连接，以实现电极组件11与电极端子13之间的转接。
在一些实施例中，请一并参阅图3和图4，且结合其他附图。转接件14用于与电极组件11焊接的部分与绝缘件15间隔设置。
需要说明的是，转接件14的其中一部分用于与电极组件11焊接，以实现转接件14和电极组件11的导通连接。电极组件11与转接件14焊接过程中，转接件14用于与电极组件11焊接的部分的温度急剧升高。
通过转接件14用于与电极组件11焊接的部分与绝缘件15间隔设置，可以减缓电极组件11和转接件14在焊接过程中产生的热量传导至绝缘件15的速度，从而可以改善绝缘件15的绝缘性能失效的问题。
需要补充说明的是，下文涉及的第一焊印和第二焊印均设置于转接件14用于与电极组件11焊接的部分。
其中，转接件14用于与电极组件11焊接的部分可以与绝缘件15的本体部151沿第一方向Z间隔分布，也可以与第一凸台152沿第二方向X间隔分布。并且，转接件14可以分为两部分，其中一部分用于与电极组件11焊接。在第二方向X上，转接件14的另一部分可以位于转接件14用于与电极组件11焊接的部分和凸柱153之间，以使转接件14用于 与电极组件11焊接的部分也可以与凸柱153间隔分布。
在一些实施例中，请一并参阅图3和图6，且结合其他附图。其中，图6为本申请一些实施例提供的电池单体10的端盖122和第一转接件14a的配合示意图，该示意图为端盖122和第一转接件14a的在第二转接件14b沿第一方向Z指向第一转接件14a的方向上的视图，该示意图通过虚线示出了第一电极端子13a、第一连接部1121a和第二连接部1122a在第一转接件14a上的投影。转接件14开设有定位孔1401，电极端子13插接于定位孔1401。
在一些可能的设计中，定位孔1401沿第一方向Z贯通转接件14远离电极组件11的一端。在另一些可能的设计中，如图3和图6所示，定位孔1401沿第一方向Z贯通转接件14的相对两端。并且，电极端子13设置于外壳12沿第一方向Z的壁，且电极端子13沿第一方向Z插接于定位孔1401。
在一些可能的设计中，如图3和图6所示，第一转接件14a开设有上述定位孔1401，第一电极端子13a插接于第一转接件14a的定位孔1401。在一些可能的设计中，第二转接件14b也可以开设有上述定位孔1401，第二电极端子13b插接于第二转接件14b的定位孔1401。在一些可能的设计中，第一转接件14a和第二转接件14b都开设有上述定位孔1401，第一电极端子13a插接于第一转接件14a上的定位孔1401，第二电极端子13b插接于第二转接件14b上的定位孔1401。
通过电极端子13插接于定位孔1401，便于电极端子13在电池单体10上的定位，还便于实现电极端子13和转接件14的导通连接。
在一些可能的设计中，电极端子13和转接件14可以通过穿透焊实现导通连接，如此可以实现定位孔1401的密封，且焊接工艺简单，仅需焊接依次即可，易于实现，成本较低。
在一些实施例中，请一并参阅图3和图6，且结合其他附图。电极组件11与转接件14焊接，且电极组件11与转接件14焊接形成的焊印与定位孔1401间隔分布。
可以理解地，电极组件11的极耳112与转接件14焊接，以形成导通后，会在极耳112和转接件14之间形成焊印。该焊印是指极耳112与转接件14焊接过程中使用到的焊料凝固而成的结构。并且，该焊印与定位孔1401间隔分布。
其中，电极组件11与转接件14焊接形成的焊印可以沿与第一方向Z交叉的方向和定位孔1401间隔分布。作为一个示例，电极组件11与转接件14焊接形成的焊印与定位孔1401沿第二方向X间隔分布。
图6中示意出了一个平面坐标系，X轴和Y轴为该平面坐标系的两个垂直的坐标轴，即X轴与Y轴垂直。并且，图6的平面坐标系为图5的空间坐标系的X轴和Y轴构成的平面坐标系。
作为一个示例，如图6所示，第一极耳112a和第一转接件14a焊接后形成的焊印与第一转接件14a上的定位孔1401间隔分布。并且，第一极耳112a与第一转接件14a焊接后形成的焊印可以包括下文涉及的第一连接部1121a，也可以同时包括下文涉及的第一连接部1121a和第二连接部1122a。当然，当第二转接件14b也开设有定位孔1401，第二极耳112b和第二转接件14b焊接后形成的焊印也可以与第二转接件14b上的定位孔1401间隔分布。并且，第二极耳112b与第二转接件14b焊接后形成的焊印可以包括下文涉及的第三连接部1121b，也可以同时包括下文涉及的第三连接部1121b和第四连接部1122b。
如此设置，可以改善极耳112与转接件14焊接过程中使用到的焊料流入定位孔1401的问题，进而可以改善极耳112与转接件14的焊接工艺会干涉定位孔1401对电极端子13的定位功能的问题，从而便于电池单体10的装配。
在一些实施例中，请一并参阅图3、图6和图7，且结合其他附图。其中，图7为本申请一些实施例提供的电池单体10的第二转接件14b的示意图，该示意图为第二转接件14b的在第一转接件14a沿第一方向Z指向第二转接件14b的方向上的视图，该示意图通过虚线示出了第二电极端子13b、第三连接部1121b和第四连接部1122b在第二转接件14b上的投影。电极组件11包括主体部111和设于主体部111的极耳112。极耳112包括多个子极 耳112，多个子极耳112焊接形成第一焊印。第一焊印的至少部分与转接件14焊接形成第二焊印，第二焊印与定位孔1401间隔分布。
子极耳112是极耳112的部分结构，多个子极耳112可以组成极耳112。其中，子极耳112连接于主体部111。
需要说明的是，极耳112与转接件14焊接时，可以先将极耳112的多个子极耳112进行预焊接，极耳112的多个子极耳112预焊接后会在极耳112上形成第一焊印。然后将第一焊印的至少部分与转接件14焊接，第一焊印的至少部分与转接件14焊接后会在第一焊印和转接件14之间形成第二焊印。
可以理解地，电极组件11与转接件14焊接形成的焊印可以包括第二焊印，第二焊印与定位孔1401间隔分布。
极耳112可以是第一极耳112a，也可以是第二极耳112b。第一极耳112a和第二极耳112b都可以包括子极耳112，第一极耳112a的子极耳112为第一子极耳112，第二极耳112b的子极耳112为第二子极耳112。即，多个第一子极耳112组成第一极耳112a，多个第二子极耳112组成第二极耳112b。
可以理解地，本申请各实施例涉及的子极耳112，可以是第一子极耳112，也可以是第二子极耳112。
如图6所示，多个第一子极耳112焊接，以在第一极耳112a上形成第一焊印。第一极耳112a上的第一焊印的至少部分与第一转接件14a焊接，以在第一极耳112a上的第一焊印和第一转接件14a之间形成第二焊印。
如图7所示，多个第二子极耳112焊接，以在第二极耳112b上形成第一焊印。第二极耳112b上的第一焊印的至少部分与第二转接件14b焊接，以在第二极耳112b上的第一焊印与第二转接件14b之间形成第二焊印。
作为一个示例，如图6所示，第一极耳112a的第一焊印和第一转接件14a之间的第二焊印与第一转接件14a上的定位孔1401间隔分布。当然，当第二转接件14b也开设有定位孔1401，第二极耳112b的第一焊印和第二转接件14b之间的第二焊印也可以与第二转接件14b上的定位孔1401间隔分布。
在此需要补充说明的是，图7的平面坐标系为图5的空间坐标系的X轴和Y轴构成的平面坐标系。
通过采用上述技术方案，使得电极组件11与转接件14焊接形成的焊印可以包括第二焊印，第二焊印与定位孔1401间隔分布，这样可以改善极耳112与转接件14焊接过程中使用到的焊料流入定位孔1401的问题，进而可以改善极耳112与转接件14的焊接工艺会干涉定位孔1401对电极端子13的定位功能的问题，从而便于电池单体10的装配。并且，通过极耳112的多个子极耳112焊接形成第一焊印，便于极耳112与转接件14进行焊接操作。
在一些实施例中，多个子极耳112焊接，且与转接件14焊接形成第一焊印，第一焊印与定位孔1401间隔分布。
可以理解地，多个子极耳112焊接的过程中，还与转接件14一并进行预焊接，以形成上述的第一焊印。
还可以理解地，电极组件11与转接件14焊接形成的焊印还可以包括第一焊印，第一焊印与定位孔1401间隔分布。
如此设置，使得多个子极耳112焊接的过程中，还与转接件14进行焊接，如此增加了极耳112与转接件14焊接的次数，可以提高转接件14与极耳112的导通强度。并且，第一焊印也与定位孔1401间隔分布，使得子极耳112与转接件14焊接过程中，焊料也不易流入定位孔1401内，从而可以改善极耳112与转接件14的焊接工艺会干涉定位孔1401对电极端子13的定位功能的问题，从而便于电池单体10的装配。
在一些实施例中，请一并参阅图3和图6，且结合其他附图。电极组件11与转接件14 焊接形成的焊印与定位孔1401的最小间距为0.2～6mm。
电极组件11与转接件14焊接形成的焊印可以包括第一焊印和第二焊印，也可以包括第二焊印，而不包括第一焊印。
以第一转接件14a为例，如图6所示，当多个第一子极耳112焊接的过程中，还与第一转接件14a焊接形成第一焊印，且第一焊印的至少部分与第一转接件14a焊接形成的第二焊印，此时电极组件11与转接件14焊接形成的焊印可以包括第一焊印和第二焊印。第一焊印与第一转接件14a间隔分布，第二焊印与定位孔1401间隔分布。基于此，第一焊印在第一转接件14a上的正投影大于第二焊印，且覆盖第二焊印。电极组件11与转接件14焊接形成的焊印与定位孔1401的最小间距为第一焊印与定位孔1401的直线距离，为第一间距H4。
当多个第一子极耳112焊接形成第一焊印的过程中，并没有与第一转接件14a焊接，而是在焊接后，将第一焊印的至少部分与第一转接件14a焊接形成第二焊印，此时电极组件11与转接件14焊接形成的焊印可以包括第二焊印，而不包括第一焊印。第二焊印与定位孔1401间隔分布。基于此，电极组件11与转接件14焊接形成的焊印与定位孔1401的最小间距为第二焊印与定位孔1401的直线距离，为第二间距H5。
可以理解地，电极组件11与转接件14焊接形成的焊印与定位孔1401的最小间距可以是0.5mm、0.8mm、1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm等。
如此设置，使得电极组件11与转接件14焊接形成的焊印与定位孔1401的最小间距具有合适的范围，一方面可以改善电极组件11与转接件14焊接过程中的焊料流入定位孔1401内的问题，从而可以改善电极组件11与转接件14的焊接工艺干涉定位孔1401对电极端子13的定位操作的问题。另一方面，使得电极组件11与转接件14焊接形成的焊印、定位孔1401等可以紧凑地分布于转接件14，如此可以减小转接件14的尺寸。
在一些实施例中，请一并参阅图3和图6，且结合其他附图。电极组件11包括主体部111和设于所述主体部111的极耳112，极耳112包括第一极耳112a，电极端子13包括第一电极端子13a，转接件14包括第一转接件14a，绝缘件15包括第一绝缘件15a。第一转接件14a导通连接于第一极耳112a和第一电极端子13a，第一绝缘件15a的至少部分位于第一转接件14a与外壳12之间，第一绝缘件15a的至少部分与第一转接件14a间隔分布。第一转接件14a与第一极耳112a导通连接，以形成多个间隔分布的第一连接部1121a。
第一连接部1121a是指第一转接件14a与第一极耳112a导通连接形成的结构，第一连接部1121a设置于第一转接件14a与第一极耳112a之间。
需要说明的是，当第一转接件14a与第一极耳112a通过焊接的方式形成导通连接，第一转接件14a与第一极耳112a导通连接形成的第一连接部1121a，指的是上文涉及的第二焊印。
通过第一极耳112a与第一转接件14a导通连接形成多个间隔分布的第一连接部1121a，使得第一极耳112a连接至第一转接件14a的多个不同位置。这样，一方面，使得第一转接件14a和第一极耳112a之间的电流分布可以更加均匀，如此可以降低第一转接件14a的过流温度，以改善第一转接件14a的电流集中致使热量集中的问题，进而可以改善第一转接件14a的热量过高致使第一绝缘件15a的绝缘性能失效的问题。另一方面，可以使得第一转接件14a和第一极耳112a之间具有较大的过流能力。
在一些实施例中，请一并参阅图3和图6，且结合其他附图。外壳12开设有注液孔1201，多个第一连接部1121a设于第一电极端子13a远离注液孔1201的一侧。
注液孔1201是指用于供电解质进入电池单体10的内部环境的孔。
第一连接部1121a位于第一电极端子13a远离注液孔1201的一侧。作为一个示例，如图6所示，第一连接部1121a位于第一电极端子13a沿第二方向X远离注液孔1201的一侧。也即是，在第二方向X上，第一电极端子13a位于注液孔1201和第一连接部1121a之间，且注液孔1201和第一连接部1121a之间的连线(直线)可以穿过第一电极端子13a。并且， 多个第一连接部1121a位于第一电极端子13a沿第二方向X远离注液孔1201的同一侧，即任意相邻的两个第一连接部1121a之间的连线(直线)没有穿过第一电极端子13a。
通过第一连接部1121a位于第一电极端子13a远离注液孔1201的一侧，使得第一转接件14a可以尽可能地远离注液孔1201设置，这样，能够使得第一转接件14a不会干涉注液孔1201的工作。
在此需要补充说明的是，注液孔1201与第一转接件14a间隔分布，使得第一转接件14a避开注液孔1201设置。这样，使得第一转接件14a不会干涉电解质注入外壳12内的操作。
在一些实施例中，在第一转接件14a的面积够大的情况下，也可以将多个第一连接部1121a分布在第一电极端子13a的相对两侧，具体为将第一电极端子13a第一连接部1121a的至少部分设置于两个第一连接部1121a之间，即，使得两个第一连接部1121a的连线(直线)可以穿过第一电极端子13a。如此，可以使得第一转接件14a的电流分布更加均匀，可以降低第一绝缘件15a的绝缘性能失效的风险。
在一些实施例中，请一并参阅图3至图6，且结合其他附图。外壳12沿第一方向Z的其中一侧设有第一壁122a，第一电极端子13a和注液孔1201间隔设于第一壁122a。
可以理解地，注液孔1201和第一电极端子13a设于外壳12沿第一方向Z的同一个壁。
如图3至图6所示，注液孔1201与第一转接件14a沿第一方向Z间隔分布。并且，注液孔1201与第一转接件14a还沿第二方向X间隔分布，使得注液孔1201与第一转接件14a间隔分布。
通过第一电极端子13a和注液孔1201设置于外壳12沿第一方向Z的同一个壁，利于提高电池单体10的结构紧凑性。
在一些实施例中，请一并参阅图3和图6，且结合其他附图。第一极耳112a包括多个第一子极耳112，多个第一子极耳112连接形成的第二连接部1122a。第二连接部1122a的至少部分与第一转接件14a导通连接形成第一连接部1121a。
第二连接部1122a是指多个第一子极耳112连接形成的结构，第二连接部1122a设置于第一极耳112a。
需要说明的是，当多个第一子极耳112通过焊接的方式形成连接，多个第一子极耳112连接形成第二连接部1122a，指的是上文涉及的第一焊印。
基于上述结构，在将第一极耳112a和第一转接件14a导通连接的过程中，可以先将多个第一子极耳112连接形成第二连接部1122a，然后将第二连接部1122a的至少部分与第一转接件14a导通连接，以使第一极耳112a与第一转接件14a形成导通连接。如此设置，能够使得第一极耳112a较好地与第一转接件14a导通连接。
在一些实施例中，请一并参阅图3和图7，且结合其他附图。极耳112还包括第二极耳112b，电极端子13还包括第二电极端子13b，转接件14还包括第二转接件14b，绝缘件15还包括第二绝缘件15b。第二转接件14b导通连接于第二极耳112b和第二电极端子13b，第二绝缘件15b的至少部分位于第二转接件14b和外壳12之间，第二绝缘件15b的至少部分与第二转接件14b间隔分布。
可以理解地，电极端子13的数量、转接件14的数量和绝缘件15的数量都是两个，两个电极端子13分别为第一电极端子13a和第二电极端子13b，两个转接件14分别是第一转接件14a和第二转接件14b，两个绝缘件15分别为第一绝缘件15a和第二绝缘件15b。其中，第一转接件14a与第一极耳112a导通连接，第一转接件14a与第一电极端子13a导通连接。第二转接件14b与第二极耳112b导通连接，第二转接件14b与第二电极端子13b导通连接。第一绝缘件15a的至少部分位于第一转接件14a和外壳12的内壁之间，以实现第一转接件14a和外壳12之间的绝缘。第二绝缘件15b的至少部分设置于第二转接件14b和外壳12之间，以实现外壳12和第二转接件14b之间的绝缘。
如此设置，使得各转接件14与外壳12之间都可以设置有绝缘件15，从而可以实现各转接件14与外壳12之间的绝缘。
在一些实施例中，请一并参阅图3和图7，且结合其他附图。极耳112还包括第二极耳112b，电极端子13还包括第二电极端子13b，转接件14还包括第二转接件14b，第二转接件14b导通连接于第二极耳112b和第二电极端子13b。第二极耳112b与第二转接件14b导通连接，以形成多个间隔分布的第三连接部1121b。
第三连接部1121b是指第二转接件14b与第二极耳112b导通连接形成的结构，第三连接部1121b设置于第二转接件14b与第二极耳112b之间。
需要说明的是，当第二转接件14b与第二极耳112b通过焊接的方式形成导通连接，第二转接件14b与第二极耳112b导通连接形成的第三连接部1121b，指的是上文涉及的第二焊印。
通过第二极耳112b与第二转接件14b导通连接形成多个间隔分布的第三连接部1121b，使得第二极耳112b连接至第二转接件14b的多个不同位置。这样，一方面，使得第二转接件14b和第二极耳112b之间的电流分布可以更加均匀，如此可以降低第二转接件14b的过流温度，以改善第二转接件14b的电流集中致使热量集中的问题，进而可以改善第二转接件14b的热量过高致使第二绝缘件15b的绝缘性能失效的问题。另一方面，可以使得第二转接件14b和第二极耳112b之间具有较大的过流能力。
在一些实施例中，请参阅图7，且结合其他附图。第二电极端子13b的至少部分位于两个第三连接部1121b之间。
可以理解地，两个第三连接部1121b的连线(直线)可以穿过第二电极端子13b。
作为一个示例，如图7所示，其中两个第三连接部1121b沿第二方向X间隔分布。并且，第二电极端子13b的部分位于两个第三连接部1121b之间，如此使得其中一个第三连接部1121b、第二电极端子13b的部分、另一个第三连接部1121b沿第二方向X依次分布，从而使得两个第三连接部1121b分设于第二电极端子13b沿第二方向X的相对两侧。当然，在其他的示例中，其中两个第三连接部1121b也可以沿分别与第一方向Z、第二方向X交叉的方向间隔分布，且第二电极端子13b的至少部分位于两个第三连接部1121b之间。
如此设置，使得第二转接件14b的用于与第二极耳112b连接的多个位置更加分散开，可以使得电池单体10内部的电流更加均匀，从而可以降低第二转接件14b的过流温度，进而可以降低第二转接件14b致使第二绝缘件15b的绝缘性能失效的风险。
在一些实施例中，请参阅图7，且结合其他附图。第二极耳112b包括多个第二子极耳112，多个第二子极耳112连接形成第四连接部1122b，第四连接部1122b的至少部分与第二转接件14b导通连接形成第三连接部1121b。
第四连接部1122b是指多个第二子极耳112连接形成的结构，第四连接部1122b设置于第二极耳112b。
需要说明的是，当多个第二子极耳112通过焊接的方式形成连接，多个第二子极耳112连接形成的第四连接部1122b，指的是上文涉及的第一焊印。
基于上述结构，在将第二极耳112b和第二转接件14b导通连接的过程中，可以先将多个第二子极耳112连接形成第四连接部1122b，然后将第四连接部1122b的至少部分与第二转接件14b导通连接，以使第二极耳112b与第二转接件14b形成导通连接。如此设置，能够使得第二极耳112b较好地与第二转接件14b导通连接。
在一些实施例中，请参阅图7，且结合其他附图。多个第二子极耳112连接形成多个间隔分布的第四连接部1122b。各第四连接部1122b的至少部分与第二转接件14b导通连接形成对应的第三连接部1121b。
通过第二子极耳112连接形成多个间隔分布的第四连接部1122b，以使各第四连接部1122b与第二转接件14b导通连接形成对应的第三连接部1121b，使得第二转接件14b和第二极耳112b之间的电流可以更加均匀地分布，从而可以降低第二转接件14b的过流温度，从而可以降低第二转接件14b致使第二绝缘件15b的绝缘性能失效的风险。
基于上述构思，请参阅图2，本申请实施例还提供了一种电池100，电池100包括电池 单体10。其中，本实施例中的电池单体10与上一实施例中的电池单体10相同，具体请参阅上一实施例中电池单体10的相关描述，此处不赘述。
本申请实施例提供的电池100，通过采用了以上涉及的电池单体10，通过绝缘件15的至少部分与转接件14间隔分布设置，可以减缓转接件14和绝缘件15之间的热量传导，进而可以改善转接件14上的热量传导至绝缘件15致使绝缘件15的绝缘性能失效的问题，如此使得绝缘件15可以良好地实现转接件14和外壳12之间的绝缘效果，使得电池100具有较高的可靠性。
基于上述构思，请参阅图1，本申请实施例还提供了一种用电装置，用电装置包括电池单体10或电池100。其中，本实施例中的电池单体10、电池100与上一实施例中的电池单体10、电池100相同，具体请参阅上一实施例中电池单体10、电池100的相关描述，此处不赘述。
本申请实施例提供的用电装置，通过采用了以上涉及的电池单体10或电池100，通过绝缘件15的至少部分与转接件14间隔分布设置，可以减缓转接件14和绝缘件15之间的热量传导，进而可以改善转接件14上的热量传导至绝缘件15致使绝缘件15的绝缘性能失效的问题，如此使得绝缘件15可以良好地实现转接件14和外壳12之间的绝缘效果，使得电池100或电池单体10具有较高的可靠性。
作为本申请的其中一个实施例，如图3至图7所示，电池单体10包括外壳12、电极组件11、第一电极端子13a、第二电极端子13b、第一转接件14a、第二转接件14b、第一绝缘件15a和第二绝缘件15b。电极组件11、第一转接件14a、第二转接件14b、第一绝缘件15a和第二绝缘件15b均设于外壳12内。电极组件11包括主体部111、第一极耳112a和第二极耳112b，第一极耳112a和第二极耳112b分设于主体部111沿第一方向Z的相对两端。外壳12沿第一方向Z的相对两个壁分别为第一壁122a和第二壁122b，第一电极端子13a设于第一壁122a，第二电极端子13b设于第二壁122b。沿第一方向Z，第一转接件14a设于第一极耳112a，第一绝缘件15a的至少部分位于第一转接件14a和第一壁122a之间。沿第一方向Z，第二转接件14b设于第二极耳112b，第二绝缘件15b的至少部分位于第二转接件14b和第二壁122b之间。第一转接件14a和第一极耳112a焊接，第一转接件14a和第一电极端子13a焊接。第二转接件14b和第二极耳112b焊接，第二转接件14b和第二电极端子13b焊接。并且，第一绝缘件15a的至少部分和第一转接件14a间隔设置，第二绝缘件15b的至少部分和第二转接件14b间隔设置。
第一转接件14a开设有定位孔1401，第一电极端子13a沿第一方向Z插接于定位孔1401。第一极耳112a与第一转接件14a焊接形成的焊印和定位孔1401间隔布置。
第一壁122a开设有注液孔1201，第一转接件14a与第一极耳112a焊接形成的焊印位于第一电极端子13a远离注液孔1201的一侧。
第二转接件14b与第二极耳112b焊接形成的焊印分设于第二电极端子13b的相对两侧，具体为第二电极端子13b的至少部分位于第二转接件14b与第二极耳112b焊接形成的其中两个焊印之间。
以上仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (24)

  1. 一种电池单体(10)，其中，包括：
    外壳(12)；
    电极组件(11)，设于所述外壳(12)内；
    电极端子(13)；
    转接件(14)，设于所述外壳(12)内，且导通连接于所述电极组件(11)和所述电极端子(13)；
    绝缘件(15)，设于所述外壳(12)内，且至少部分位于所述转接件(14)与所述外壳(12)之间，所述绝缘件(15)的至少部分与所述转接件(14)间隔分布。
  2. 根据权利要求1所述的电池单体(10)，其中，所述转接件(14)设置于所述电极组件(11)沿第一方向(Z)的端部；所述绝缘件(15)包括本体部(151)，沿所述第一方向(Z)，所述本体部(151)位于所述转接件(14)和所述外壳(12)之间，且与所述转接件(14)沿所述第一方向(Z)间隔分布。
  3. 根据权利要求2所述的电池单体(10)，其中，所述绝缘件(15)还包括第一凸台(152)，所述第一凸台(152)设置于所述本体部(151)沿所述第一方向(Z)朝向所述电极组件(11)的一侧；所述转接件(14)与所述第一凸台(152)沿第二方向(X)间隔分布，所述第二方向(X)与所述第一方向(Z)交叉。
  4. 根据权利要求2或3所述的电池单体(10)，其中，所述外壳(12)沿所述第一方向(Z)的壁开设有注液孔(1201)，所述绝缘件(15)还包括凸柱(153)，所述凸柱(153)设置于所述本体部(151)沿所述第一方向(Z)朝向所述电极组件(11)的一侧；所述凸柱(153)连通于所述注液孔(1201)，且与所述外壳(12)内连通；所述转接件(14)与所述凸柱(153)沿第二方向(X)间隔分布，所述第二方向(X)与所述第一方向(Z)交叉。
  5. 根据权利要求1-4任一项所述的电池单体(10)，其中，所述绝缘件(15)的至少部分与所述转接件(14)间隔形成的间隙大于0.1mm。
  6. 根据权利要求5所述的电池单体(10)，其中，所述绝缘件(15)的至少部分与所述转接件(14)的间隔形成的间隙小于2mm。
  7. 根据权利要求1-6任一项所述的电池单体(10)，其中，所述电极组件(11)与所述转接件(14)焊接。
  8. 根据权利要求7所述的电池单体(10)，其中，所述电极组件(11)与所述转接件(14)焊接形成的焊印与所述绝缘件(15)间隔设置。
  9. 根据权利要求1-8任一项所述的电池单体(10)，其中，所述转接件(14)开设有定位孔(1401)，所述电极端子(13)插接于所述定位孔(1401)。
  10. 根据权利要求9所述的电池单体(10)，其中，所述电极组件(11)与所述转接件(14)焊接，且所述电极组件(11)与所述转接件(14)焊接形成的焊印与所述定位孔(1401)间隔分布。
  11. 根据权利要求10所述的电池单体(10)，其中，所述电极组件(11)包括主体部(111)和设于所述主体部(111)的极耳(112)；所述极耳(112)包括多个子极耳，多个所述子极耳焊接形成第一焊印，所述第一焊印的至少部分与所述转接件(14)焊接形成第二焊印，所述第二焊印与所述定位孔(1401)间隔分布。
  12. 根据权利要求11所述的电池单体(10)，其中，多个所述子极耳焊接，且与所述转接件(14)焊接形成所述第一焊印，所述第一焊印与所述定位孔(1401)间隔分布。
  13. 根据权利要求10-12任一项所述的电池单体(10)，其中，所述电极组件(11)与 所述转接件(14)焊接形成的焊印与所述定位孔(1401)的最小间距为0.2～6mm。
  14. 根据权利要求1-13任一项所述的电池单体(10)，其中，所述电极组件(11)包括主体部(111)和设于所述主体部(111)的极耳(112)；所述极耳(112)包括第一极耳(112a)，所述电极端子(13)包括第一电极端子(13a)，所述转接件(14)包括第一转接件(14a)，所述绝缘件(15)包括第一绝缘件(15a)；所述第一转接件(14a)导通连接于所述第一极耳(112a)和所述第一电极端子(13a)，所述第一绝缘件(15a)的至少部分位于所述第一转接件(14a)与所述外壳(12)之间，所述第一绝缘件(15a)的至少部分与所述第一转接件(14a)间隔分布；
    所述第一转接件(14a)与所述第一极耳(112a)导通连接，以形成多个间隔分布的第一连接部(1121a)。
  15. 根据权利要求14所述的电池单体(10)，其中，所述外壳(12)开设有注液孔(1201)，多个所述第一连接部(1121a)设于所述第一电极端子(13a)远离所述注液孔(1201)的一侧。
  16. 根据权利要求15所述的电池单体(10)，其中，所述外壳(12)沿第一方向(Z)的其中一侧设有第一壁(122a)，所述第一电极端子(13a)和所述注液孔(1201)间隔设于所述第一壁(122a)。
  17. 根据权利要求14-16任一项所述的电池单体(10)，其中，所述第一极耳(112a)包括多个第一子极耳，多个所述第一子极耳连接形成第二连接部(1122a)，所述第二连接部(1122a)的至少部分与所述第一转接件(14a)导通连接形成所述第一连接部(1121a)。
  18. 根据权利要求14-17任一项所述的电池单体(10)，其中，所述极耳(112)还包括第二极耳(112b)，所述电极端子(13)还包括第二电极端子(13b)，所述转接件(14)还包括第二转接件(14b)，所述绝缘件(15)还包括第二绝缘件(15b)；所述第二转接件(14b)导通连接于所述第二极耳(112b)和所述第二电极端子(13b)，所述第二绝缘件(15b)的至少部分位于所述第二转接件(14b)和所述外壳(12)之间，所述第二绝缘件(15b)的至少部分与所述第二转接件(14b)间隔分布。
  19. 根据权利要求14-18任一项所述的电池单体(10)，其中，所述极耳(112)还包括第二极耳(112b)，所述电极端子(13)还包括第二电极端子(13b)，所述转接件(14)还包括第二转接件(14b)，所述第二转接件(14b)导通连接于所述第二极耳(112b)和所述第二电极端子(13b)；所述第二极耳(112b)与所述第二转接件(14b)导通连接，以形成多个间隔分布的第三连接部(1121b)。
  20. 根据权利要求19所述的电池单体(10)，其中，所述第二电极端子(13b)的至少部分位于两个所述第三连接部(1121b)之间。
  21. 根据权利要求19或20所述的电池单体(10)，其中，所述第二极耳(112b)包括多个第二子极耳，多个所述第二子极耳连接形成第四连接部(1122b)，所述第四连接部(1122b)的至少部分与所述第二转接件(14b)导通连接形成所述第三连接部(1121b)。
  22. 根据权利要求21所述的电池单体(10)，其中，多个所述第二子极耳连接形成多个间隔分布的所述第四连接部(1122b)，各所述第四连接部(1122b)的至少部分与所述第二转接件(14b)导通连接形成对应的所述第三连接部(1121b)。
  23. 一种电池(100)，其中，包括根据权利要求1-22任一项所述的电池单体(10)。
  24. 一种用电装置，其中，包括根据权利要求1-22任一项所述的电池单体(10)；或者，包括根据权利要求22所述的电池(100)。
PCT/CN2024/073714 2023-08-11 2024-01-23 电池单体、电池及用电装置 Pending WO2025035708A1 (zh)

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JP2013093287A (ja) * 2011-10-27 2013-05-16 Hitachi Vehicle Energy Ltd 単電池および組電池
CN215988974U (zh) * 2021-08-23 2022-03-08 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN216054941U (zh) * 2021-08-31 2022-03-15 宁德时代新能源科技股份有限公司 电池单体、电池以及用电设备
CN216120664U (zh) * 2021-10-20 2022-03-22 宁德时代新能源科技股份有限公司 电池单体、电池及用电装置
CN218602480U (zh) * 2022-09-07 2023-03-10 宁德时代新能源科技股份有限公司 集流构件、电池单体、电池及用电装置

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Publication number Priority date Publication date Assignee Title
JP2013093287A (ja) * 2011-10-27 2013-05-16 Hitachi Vehicle Energy Ltd 単電池および組電池
CN215988974U (zh) * 2021-08-23 2022-03-08 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN216054941U (zh) * 2021-08-31 2022-03-15 宁德时代新能源科技股份有限公司 电池单体、电池以及用电设备
CN216120664U (zh) * 2021-10-20 2022-03-22 宁德时代新能源科技股份有限公司 电池单体、电池及用电装置
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