WO2024011505A1 - 电池的连接组件、电池及用电装置 - Google Patents

电池的连接组件、电池及用电装置 Download PDF

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Publication number
WO2024011505A1
WO2024011505A1 PCT/CN2022/105735 CN2022105735W WO2024011505A1 WO 2024011505 A1 WO2024011505 A1 WO 2024011505A1 CN 2022105735 W CN2022105735 W CN 2022105735W WO 2024011505 A1 WO2024011505 A1 WO 2024011505A1
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WO
WIPO (PCT)
Prior art keywords
component
bus
battery
insulating
insulating member
Prior art date
Application number
PCT/CN2022/105735
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English (en)
French (fr)
Inventor
徐晨怡
黄小腾
杨海奇
郭海建
廖柏翔
刘瑞堤
王鹏
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/105735 priority Critical patent/WO2024011505A1/zh
Priority to CN202280089729.3A priority patent/CN118661332A/zh
Publication of WO2024011505A1 publication Critical patent/WO2024011505A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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 more specifically, to a battery connection component, a battery and an electrical device.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • This application provides a battery connection component, a battery and an electrical device, which can improve the safety of the battery.
  • a battery connection assembly including a bus component and an insulating component.
  • the bus component is used to electrically connect the battery cells of the battery; the insulating component covers at least part of the bus component.
  • the electrical connection between multiple battery cells is realized through the bus component, so that the multiple battery cells can be connected in series or in parallel or mixed together.
  • the insulating component covers at least part of the bus component, has an insulating effect on the bus component, and improves the safety of the battery.
  • the insulating component includes a stacked first insulating component and a second insulating component, at least part of the busing component is located between the first insulating component and the second insulating component, and the busing component is fixed to the first insulating component and the second insulating component. at least one of the second insulators.
  • the first insulating member and the second insulating member can insulate the battery cells from the outside, thereby improving the safety of the battery.
  • the bus component is fixed to at least one of the first insulator and the second insulator, and at least part of the bus component is sandwiched between the first insulator and the second insulator, thereby improving the connection firmness of the bus component.
  • Enhanced battery stability is provided.
  • the insulating component further includes a third insulating component located between the bus component and the second insulating component.
  • the third insulating member is sandwiched between the first insulating member and the second insulating member, so that the third insulating member cannot easily leave the bus component.
  • the spray valve airflow cannot easily open the third insulating part, or the high-temperature ejection burns or destroys the third insulating part.
  • the third insulating part insulates and protects the converging parts to prevent the converging parts from being exposed and the ejection will merge. When components overlap, high-voltage arcing occurs.
  • the area of the third insulating member is smaller than the area of the first insulating member and the second insulating member respectively, and the third insulating member is disposed corresponding to the bus component.
  • the first insulating piece and the second insulating piece have larger areas, which have better insulation effect on the battery cells.
  • the third insulating piece is arranged correspondingly with the busing part, which can ensure the protection effect of the third insulating part on the busing part. .
  • the melting point of the third insulating member is greater than the melting points of the first insulating member and the second insulating member respectively.
  • the first insulating member and the second insulating member are melted. Since the melting point of the third insulating member is higher, it prevents the high-temperature ejection from burning or destroying the third insulating member, ensuring that the third insulating member is Insulation protects the busbars.
  • the second insulating member is provided with a first via hole
  • the third insulating member is provided with a second via hole
  • the first via hole and the second via hole are provided correspondingly.
  • the first via hole and the second via hole can be passed through respectively, and laser welding is used to connect the bus component and the battery cell to ensure the firmness of the connection between the bus component and the battery cell.
  • the size of the second via is smaller than the size of the first via.
  • the size of the first via hole is larger, which can facilitate the passage of the laser during laser welding, and the size of the second via hole is smaller, which can reduce the exposed area of the bus component and improve the safety of the battery.
  • the number of the second via holes is multiple, and in the stacking direction of the first insulating member and the second insulating member, the projections of the multiple second via holes are located in the first via holes.
  • the arrangement of multiple second via holes can increase the number of welding positions of the bus component and further improve the stability of the connection between the bus component and the battery cells.
  • the first via holes correspond to a plurality of second via holes, which facilitates opening of the first via holes on the second insulating member.
  • connection assembly includes at least one bus row, the bus row includes a plurality of bus parts spaced apart along the first direction; the third insulating member covers the plurality of bus parts of the bus row.
  • the number of bus components is increased along the first direction, which can correspondingly increase the number of battery cells along the first direction.
  • the series, parallel or mixed connection between these battery cells is realized through multiple bus components, which improves the efficiency of battery cells. battery capacity.
  • the third insulating piece covers multiple bus parts of the bus row, eliminating the need for a separate third insulating part for each bus part, which facilitates process preparation.
  • there are a plurality of bus rows the plurality of bus rows are spaced apart along the second direction, there are a plurality of third insulating members, and the plurality of third insulating members are arranged in one-to-one correspondence with the plurality of bus rows; wherein, the first One direction intersects the second direction.
  • the number of bus rows is increased along the second direction, which can correspondingly increase the number of battery cells along the second direction, further increasing the battery capacity.
  • multiple bus rows are disposed on the first insulating member, which facilitates assembly of the return row and improves assembly efficiency.
  • the first insulating member is provided with a third via hole
  • the bus component covers the third via hole
  • a portion of the bus component is exposed through the third via hole to be electrically connected to the battery cell.
  • the bus component can be exposed through the third via hole and contacted with the battery cell, thereby facilitating the connection between the bus component and the battery cell through laser welding.
  • the insulating component is a thermoformed part.
  • the bus component can be firmly connected to the insulating component through thermoforming, which improves the connection stability of the connection component.
  • a second embodiment of the present application provides a battery, including a battery cell and a connection component according to any of the above embodiments, and a bus component is electrically connected to the battery cell.
  • a third embodiment of the present application provides an electrical device, including the above-mentioned battery, and the battery is used to provide electrical energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • FIG. 2 is an exploded schematic diagram of a battery provided by some embodiments of the present application.
  • FIG 3 is a schematic structural diagram of the battery module shown in Figure 2;
  • Figure 4 is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application.
  • Figure 5 is a schematic assembly diagram of a connection component and a battery cell provided by some embodiments of the present application.
  • Figure 6 is an exploded schematic diagram of a connection component provided by some embodiments of the present application.
  • Figure 7 is a schematic structural diagram of a connection component provided by some embodiments of the present application.
  • Figure 8 is an exploded schematic diagram of a connection component provided by other embodiments of the present application.
  • Vehicle 1000 battery 100; controller 200; motor 300; box 10; upper cover 10a; lower cover 10b; battery module 400; battery cell 20; case 22; end cap 21; electrode terminal 26; electrode assembly 23; First direction
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
  • connection should be understood in a broad sense.
  • connection can be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can be a fixed connection
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • “Plural” appearing in this application means two or more (including two).
  • the battery cells may include lithium ion secondary batteries, lithium ion primary batteries, lithium-sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of this application.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, rectangular battery cells and soft-pack battery cells, and the embodiments of the present application are not limited to this.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the current collector that is not coated with the positive electrode active material layer protrudes from the current collector that is coated with the positive electrode active material layer.
  • the current collector coated with the positive electrode active material layer is laminated to form a positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector that is not coated with the negative electrode active material layer protrudes from the current collector that is coated with the negative electrode active material layer.
  • the current collector coated with the negative electrode active material layer is laminated to serve as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon.
  • the material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
  • multiple battery cells need to be connected in series and parallel to form a battery module, and then multiple battery modules need to be connected in series and parallel to form a large module.
  • the conventional method is to lead out the collected positive and negative electrodes through a bus component, and the bus component is electrically connected to the battery cells to realize the electrical connection between the battery cells, thereby transmitting current. If the bus components are directly exposed, high-voltage arcing may easily occur, affecting the safety of the battery.
  • the connection assembly of the battery includes a bus component and an insulating component.
  • the bus component is used to electrically connect the battery cells of the battery; the insulating component covers at least part of the bus component. .
  • the electrical connection between multiple battery cells is realized through the bus component, so that the multiple battery cells can be connected in series or in parallel or mixed together.
  • the insulating component covers at least part of the bus component and has an insulating effect on the bus component, thereby improving the safety of the battery.
  • the battery cells disclosed in the embodiments of the present application can be used in, but are not limited to, electrical devices such as vehicles, ships, or aircrafts.
  • the power supply system of the electrical device can be composed of battery cells, batteries, etc. disclosed in this application, which is beneficial to improving the stability of battery performance and battery life.
  • Embodiments of the present application provide an electrical device that uses a battery as a power source.
  • 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 vehicle, a ship, a spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • an electric device 1000 according to an embodiment of the present application is used as an example.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 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 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used 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 the battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10 and battery cells 20 .
  • the box 10 may include an upper cover 10a and a lower cover 10b.
  • the upper cover 10a and the lower cover 10b are overlapped with each other.
  • the upper cover 10a and the lower cover 10b jointly define an accommodation space for accommodating the battery cells 20.
  • the lower cover 10b can be a hollow structure with one end open, and the upper cover 10a can be a plate-like structure.
  • the upper cover 10a covers the open side of the lower cover 10b, so that the upper cover 10a and the lower cover 10b jointly define a receiving space; the upper cover 10a can be a plate-shaped structure.
  • the box 10 formed by the upper cover 10a and the lower cover 10b can be in various shapes, such as a cylinder, a rectangular parallelepiped, etc.
  • FIG. 3 is a schematic structural diagram of the battery module 400 shown in FIG. 2 .
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery 100 can also be a plurality of battery cells 20
  • the battery modules 400 are first connected in series, parallel, or mixed, and then multiple battery modules 400 are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells 20 .
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • FIG. 4 is a schematic diagram of the exploded structure of the battery cell 20 provided in some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit that constitutes the battery. As shown in FIG. 3 , the battery cell 20 includes an end cover 21 , a case 22 , an electrode assembly 23 and other functional components.
  • the end cap 21 refers to a component that covers the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22 .
  • the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 21 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher durability. Structural strength and safety performance can also be improved.
  • Functional components such as electrode terminals 26 may be provided on the end cap 21 . The electrode terminal 26 may be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cap 21 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold.
  • the end cap 21 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating member may also be provided inside the end cover 21 , and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber, etc.
  • the casing 22 is a component used to cooperate with the end cover 21 to form an internal environment of the battery cell 20.
  • the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components.
  • the housing 22 and the end cover 21 may be independent components, and an opening may be provided on the housing 22.
  • the end cover 21 covers the opening at the opening to form the internal environment of the battery cell 20.
  • the housing 22 is a hollow structure with one side open, and the end cap 21 is one and covers the opening of the housing 22 .
  • the housing 22 is a hollow structure with openings on both sides, and there are two end caps 21 .
  • the two end caps 21 cover the two openings of the housing 22 respectively.
  • the end cover 21 and the housing 22 can also be integrated.
  • the end cover 21 and the housing 22 can form a common connection surface before other components are put into the housing.
  • the end cover 21 covers the housing 22 again.
  • the housing 22 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc.
  • the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23 .
  • the housing 22 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • the electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 23 may be contained within the housing 22 .
  • the electrode assembly 23 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly 23, and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material respectively constitute tabs.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals 26 to form a current loop.
  • Figure 5 is a schematic diagram of the assembly of a connection component and a battery cell provided by some embodiments of the present application
  • Figure 6 is an exploded schematic diagram of a connection component provided by some embodiments of the present application.
  • the embodiment of the present application provides a battery connection assembly 30, which includes a bus component 31 and an insulating component 32.
  • the bus component 31 is used to electrically connect the battery cells 20 of the battery;
  • the insulating member 32 covers at least part of the bus member 31 .
  • the bus part 31 is connected to the electrode terminals 26 of the plurality of battery cells 20 to realize electrical connection between the plurality of battery cells 20 through the bus part 31 so that the plurality of battery cells 20 can be connected in series, parallel or mixed. linked together.
  • each battery cell 20 includes a positive electrode terminal and a negative electrode terminal.
  • adjacent battery cells 20 are connected by bus members 31 .
  • the positive electrode terminal of one battery cell 20 and the negative electrode terminal of the other battery cell 20 are connected through the bus part 31; or, when the battery cells 20 are connected in parallel, one battery cell 20
  • the positive electrode terminal of the battery cell 20 and the negative electrode terminal of the other battery cell 20 are connected by a bus member 31 .
  • the insulating component 32 may be disposed on a side of the battery module 400 having the bus component 31 to cover at least part of the bus component 31 .
  • the insulating component 32 can also cover the entire battery module 400 to insulate and protect the battery module 400 .
  • the insulating component 32 covers at least part of the bus component 31 and has an insulating effect on the bus component 31, thereby improving the safety of the battery.
  • the insulating component 32 includes a stacked first insulating component 321 and a second insulating component 322 , at least part of the busing component 31 is located between the first insulating component 321 and the second insulating component 322 , and the busing component 31 Fixed to at least one of the first insulating member 321 and the second insulating member 322.
  • the first insulating member 321 is disposed close to the battery cell 20 relative to the second insulating member 322 .
  • the second insulating member 322 is located above the first insulating member 321 .
  • At least part of the bus component 31 is sandwiched between the first insulating member 321 and the second insulating member 321 . between pieces 322.
  • the bus component 31 may be fixed to the first insulating member 321 or the second insulating member 322, or may be fixed to the first insulating member 321 and the second insulating member 322 respectively.
  • the first insulating member 321 and the second insulating member 322 have the same area and can cover all battery modules 400 .
  • all the battery modules 400 form a battery module, and the area size of the first insulating member 321 and the second insulating member 322 matches the top surface of the battery module.
  • the first insulating member 321 and the second insulating member 322 can insulate the battery cell 20 from the outside, thereby improving the safety of the battery.
  • the bus component 31 is fixed to at least one of the first insulating component 321 and the second insulating component 322 . This avoids connecting the bus component 31 through other integrated boards, and instead uses the first insulating component 321 and/or the second insulating component directly.
  • 322 is used as a carrier to fix the bus component 31, which reduces the height and size of the battery, realizes a lightweight design of the battery, reduces the process preparation steps, and improves the preparation efficiency.
  • At least part of the bus component 31 is sandwiched between the first insulator 321 and the second insulator 322, which improves the connection firmness of the bus component 31 and enhances the stability of the battery.
  • the insulating component 32 further includes a third insulating component 323 located between the bus component 31 and the second insulating component 322 .
  • the third insulating member 323 covers at least part of the bus component 31, and the third insulating member 323 is sandwiched between the first insulating member 321 and the second insulating member 322, so that the third insulating member 323 cannot easily leave the bus.
  • Component 31 when the battery thermally runs out of control, if the first insulating member 321 and the second insulating member 322 are damaged, the third insulating member 323 will not be easily opened by the spray valve airflow, or the third insulating member 323 will be burned by the high-temperature ejection. Destruction, the third insulating member 323 insulates and protects the bus part 31 to prevent the bus part 31 from being exposed and the ejection from overlapping the bus part 31 to cause a high-voltage arcing phenomenon.
  • the area of the third insulating member 323 is smaller than the areas of the first insulating member 321 and the second insulating member 322 respectively, and the third insulating member 323 is disposed corresponding to the bus component 31 .
  • the area size of the first insulating member 321 and the second insulating member 322 may be equal, and the area size of the third insulating member 323 may be relatively smaller.
  • the area size of the third insulating part 323 can match the bus part 31 to cover the bus part 31 .
  • the first insulating member 321 and the second insulating member 322 have larger areas, which have better insulating effect on the battery cells 20 .
  • the third insulating member 323 is arranged corresponding to the bus part 31 to ensure that the third insulating member 323 Protection effect on the bus part 31.
  • the melting point of the third insulating member 323 is greater than the melting points of the first insulating member 321 and the second insulating member 322 respectively.
  • the third insulating member 323 can be made of mica paper and TC composite tape (Teflon Composite, polytetrafluoroethylene composite material), which can withstand high temperatures above 1000°C.
  • the first insulating member 321 and the second insulating member 322 may be made of PET (polyethylene terephthalate) plastic.
  • the third insulating member 323 has a higher melting point, it can prevent the third insulating member 323 from being burned or damaged by high-temperature ejections. , which can ensure that the third insulating member 323 can protect the bus component 31 .
  • FIG. 6 is an exploded schematic diagram of a connection component provided by some embodiments of the present application
  • FIG. 7 is a schematic structural diagram of a connection component provided by some embodiments of the present application.
  • the second insulating member 322 is provided with a first via hole 322a
  • the third insulating member 323 is provided with a second via hole 323a.
  • the first via hole 322a and the second via hole 323a are provided correspondingly.
  • the first via hole 322a and the second via hole 323a are both via holes for the laser to pass through when the bus component 31 and the battery cell 20 are laser welded.
  • the first via hole 322a is located above the second via hole 323a.
  • the size of the second via hole 323a is smaller than the size of the first via hole 322a.
  • the size of the second via hole 323a is larger than the welding track of the bus component 31 and the battery cell 20. It can be selected to be only slightly larger than the welding track, which not only ensures the welding area between the bus component 31 and the battery cell 20, but also can Reduce the size of the second via hole 323a. It should be noted that the above dimensions refer to the diameter of the second via hole 323a and the diameter of the first via hole 322a.
  • the size of the first via hole 322a is larger, which can facilitate the passage of laser light during laser welding.
  • the size of the second via hole 323a is smaller, which can reduce the exposed area of the bus component 31 and improve the safety of the battery.
  • the number of the second via holes 323a is multiple. In the stacking direction of the first insulating member 321 and the second insulating member 322, the projections of the multiple second via holes 323a are located in the first via hole 322a. .
  • One bus component 31 corresponds to a plurality of second via holes 323a.
  • the arrangement of the plurality of second via holes 323a can increase the number of welding positions of the bus component 31 and further improve the connection stability between the bus component 31 and the battery cell 20.
  • One first via hole 322a corresponds to a plurality of second via holes 323a.
  • the number of the first via holes 322a can be less than the number of the second via holes 323a, which facilitates the opening of the first via holes 322a on the second insulating member 322.
  • connection assembly 30 includes at least one bus column 310 , and the bus column 310 includes a plurality of bus components 31 spaced apart along the first direction X; the third insulating member 323 covers the plurality of bus components 31 of the bus column 310 .
  • the third insulating member 323 extends along the first direction X and can cover the plurality of bus components 31 to insulate and protect the plurality of bus components 31 arranged along the first direction X. Increasing the number of bus components 31 along the first direction X can correspondingly increase the number of battery cells 20 along the first direction Improved battery capacity.
  • the third insulating member 323 covers the plurality of bus components 31 of the bus row 310. There is no need to separately provide a third insulating member 323 for each bus component 31, which facilitates process preparation.
  • the first direction X in the embodiment of the present application is the length direction of the connection component 30 .
  • first direction X and the second direction Y may be perpendicular to each other.
  • the number of bus rows 310 can be set as needed. For example, two rows of battery cells 20 can be provided along the second direction Y, corresponding to four bus rows 310 . Two sets of bus rows 310 are provided for each row of battery cells 20 .
  • the second direction Y in the embodiment of the present application is the width direction of the connection component 30 .
  • the number of bus rows 310 is increased along the second direction Y, which can correspondingly increase the number of battery cells 20 along the second direction Y, further increasing the battery capacity.
  • multiple bus columns 310 are disposed on the first insulating member 321, which facilitates assembly of the return columns and improves assembly efficiency.
  • the first insulating member 321 is provided with a third via hole 321 a, the bus component 31 covers the third via hole 321 a, and a portion of the bus component 31 is exposed through the third via hole 321 a to be electrically connected to the battery cell 20 .
  • the bus component 31 can be exposed through the third via hole 321a and come into contact with the battery cell 20, so as to facilitate the connection between the bus component 31 and the battery cell 20 through laser welding.
  • multiple bus lines 310 may also be disposed on the second insulating member 322 .
  • insulating component 32 is a thermoformed part.
  • the first insulating member 321, the second insulating member 322 and the third insulating member 323 can all be insulating films, which have good insulation, corrosion resistance, temperature resistance, ductility, etc., and high temperature resistant insulating films can be directly used for hot pressing. Formed into one piece, thereby avoiding tedious preparation processes.
  • the bus component 31 can be firmly connected to the insulating component 32 through hot press molding, which improves the connection stability of the connection component 30 and improves the preparation efficiency.
  • the second embodiment of the present application provides a battery, including a battery cell 20 and the connection assembly 30 of any of the above embodiments.
  • the bus component 31 is electrically connected to the battery cell 20 .
  • a third embodiment of the present application provides an electrical device, including the above-mentioned battery, and the battery is used to provide electrical energy.
  • the present application provides a battery connection assembly 30, which includes a bus component 31 and an insulating component 32.
  • the bus component 31 is used to electrically connect the battery cells 20 of the battery; the insulating component 32 covers the bus component At least part of 31.
  • the insulating component 32 includes a stacked first insulating component 321 and a second insulating component 322. At least part of the bus component 31 is located between the first insulating component 321 and the second insulating component 322, and the bus component 31 is fixed to the first insulating component. 321 and at least one of the second insulating member 322.
  • the insulating component 32 also includes a third insulating component 323 located between the bus component 31 and the second insulating component 322 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请实施例提供一种电池的连接组件、电池及用电装置。电池的连接组件包括汇流部件和绝缘部件，汇流部件用于电连接电池的电池单体；绝缘部件包覆汇流部件的至少部分。通过汇流部件实现多个电池单体之间的电连接，以使多个电池单体之间可串联或并联或混联在一起。绝缘部件包覆汇流部件的至少部分，对汇流部件具有绝缘作用，提高了电池的安全性。

Description

电池的连接组件、电池及用电装置 技术领域
本申请涉及电池技术领域，并且更具体地，涉及一种电池的连接组件、电池及用电装置。
背景技术
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
在电池技术的发展中，如何提高电池的安全性，是电池技术中一个重要的研究方向。
发明内容
本申请提供了一种电池的连接组件、电池及用电装置，其能改善电池的安全性。
第一方面，本申请实施例提供了一种电池的连接组件，包括汇流部件和绝缘部件，汇流部件用于电连接电池的电池单体；绝缘部件包覆汇流部件的至少部分。
上述方案中，通过汇流部件实现多个电池单体之间的电连接，以使多个电池单体之间可串联或并联或混联在一起。绝缘部件包覆汇流部件的至少部分，对汇流部件具有绝缘作用，提高了电池的安全性。
在一些实施例中，绝缘部件包括层叠设置的第一绝缘件和第二绝缘件，汇流部件的至少部分位于第一绝缘件和第二绝缘件之间，且汇流部件固定于第一绝缘件和第二绝缘件中的至少一者。
上述方案中，第一绝缘件和第二绝缘件能够使电池单体与外部绝缘，提高电池的安全性。而且汇流部件固定于第一绝缘件和第二绝缘件中的至少一者，汇流部件的至少部分被夹设于第一绝缘件和第二绝缘件之间，提高了汇流部件的连接牢固性，增强了电池的稳定性。
在一些实施例中，绝缘部件还包括第三绝缘件，第三绝缘件位于汇流部件与第二绝缘件之间。
上述方案中，第三绝缘件被夹设于第一绝缘件和第二绝缘件之间，使得第三绝缘件不易离开汇流部件，当电池热失控时，若第一绝缘件和第二绝缘件受损，喷阀气流不易将第三绝缘件掀开，或高温喷出物将第三绝缘件烧毁、破坏，第三绝缘件对汇流部件进行绝缘保护，防止汇流部件裸露，喷出物将汇流部件搭接，出现高压拉弧现象。
在一些实施例中，第三绝缘件的面积分别小于第一绝缘件和第二绝缘件的面积，第三绝缘件对应汇流部件设置。
上述方案中，第一绝缘件和第二绝缘件的面积较大，对电池单体的绝缘效果更好，第三绝缘件与汇流部件对应设置，可保证第三绝缘件对汇流部件的保护效果。
在一些实施例中，第三绝缘件的熔点分别大于第一绝缘件和第二绝缘件的熔点。
上述方案中，若电池热失控，第一绝缘件和第二绝缘件被烧熔，由于第三绝缘件的熔点较高，防止高温喷出物将第三绝缘件烧毁、破坏，可保证第三绝缘件能够保护汇流部件。
在一些实施例中，第二绝缘件上设置有第一过孔，第三绝缘件上设置有第二过孔，第一过孔和第二过孔对应设置。
上述方案中，可分别穿过第一过孔和第二过孔，采用激光焊接将汇流部件与电池单体连接，以使汇流部件与电池单体之间的连接牢固性。
在一些实施例中，第二过孔的尺寸小于第一过孔的尺寸。
上述方案中，第一过孔的尺寸较大，可便于激光焊接时激光穿过，第二过孔的尺寸较小，可减小汇流部件的裸露面积，提高电池的安全性。
在一些实施例中，第二过孔的数量为多个，在第一绝缘件和第二绝 缘件的层叠方向上，多个第二过孔的投影位于第一过孔内。
上述方案中，多个第二过孔的设置，可增加汇流部件的焊接位置，进一步提高汇流部件与电池单体之间的连接稳固性。第一过孔对应多个第二过孔，便于第二绝缘件上的第一过孔的开设。
在一些实施例中，连接组件包括至少一个汇流列，汇流列包括多个沿第一方向间隔设置的汇流部件；第三绝缘件覆盖汇流列的多个汇流部件。
上述方案中，沿第一方向增加了汇流部件的数量，可对应增加沿第一方向电池单体的数量，通过多个汇流部件实现这些电池单体之间的串联、并联或混联，提高了电池容量。第三绝缘件覆盖汇流列的多个汇流部件，无需每个汇流部件均单独对应设置第三绝缘件，便于工艺制备。
在一些实施例中，汇流列为多个，多个汇流列沿第二方向间隔设置，第三绝缘件为多个，多个第三绝缘件与多个汇流列一一对应设置；其中，第一方向与第二方向相交设置。
上述方案中，沿第二方向增加了汇流列的数量，可对应增加沿第二方向电池单体的数量，进一步提高了电池容量。
在一些实施例中，多个汇流列均设置于第一绝缘件，便于回流列的装配，提高了装配效率。
在一些实施例中，第一绝缘件上设置有第三过孔，汇流部件覆盖第三过孔，汇流部件的部分露出于第三过孔以与电池单体电连接。
上述方案中，通过第三过孔可使汇流部件露出，与电池单体接触，便于通过激光焊接实现汇流部件与电池单体之间的连接。
在一些实施例中，绝缘部件为热压成型件，通过热压成型可将汇流部件稳固地连接于绝缘部件，提高了连接组件的连接稳定性。
本申请第二方面的实施例提供一种电池，包括电池单体以及上述任一实施方式的连接组件，汇流部件与电池单体电连接。
本申请第三方面的实施例提供一种用电装置，包括上述电池，电池用于提供电能。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述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，还可以根据附图获得其他的附图。
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的爆炸示意图；
图3为图2所示的电池模块的结构示意图；
图4为本申请一些实施例电池单体的分解结构示意图；
图5为本申请一些实施例提供的连接组件与电池单体的装配示意图；
图6为本申请一些实施例提供的连接组件的分解示意图；
图7为本申请一些实施例提供的连接组件的结构示意图；
图8为本申请另一些实施例提供的连接组件的分解示意图。
附图标号如下：
车辆1000；电池100；控制器200；马达300；箱体10；上盖10a；下盖10b；电池模块400；电池单体20；壳体22；端盖21；电极端子26；电极组件23；第一方向X；第二方向Y；连接组件30；汇流部件31；汇流列310；绝缘部件32；第一绝缘件321；第二绝缘件322；第三绝缘件323；第一过孔322a；第二过孔323aa；第三过孔321a。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书 中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；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。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。
本申请中术语“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：单独存在A，同时存在A和B，单独存在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。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方体方形电池单体和软包电池单体，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指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。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔离膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的集流体凸出于已涂覆正极活性物质层的集流体，未涂敷正极活性物质层的集流体层叠后作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的集流体凸出于已涂覆负极活性物质层的集流体，未涂敷负极活性物质层的集流体层叠后作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
发明人发现，由于新能源汽车的不断普及，新能源汽车中动力电池的使用要求变得越来越高，特别是用户对新能源汽车续航里程的要求不断提高。为了满足汽车动力需求，故需将多个电池单体进行串并联形成电池模组，再将多个电池模组进行串并联构成大模组。目前，常规方法一般是通过汇流部件引出汇总的正负极，汇流部件与电池单体电连接以实现电池单体之间的电气连接，从而传输电流。若将汇流部件直接裸露，容易出现高压拉弧现象，影响电池的安全性。
鉴于此，本申请提供了一种技术方案，在该技术方案中，电池的连接组件包括汇流部件和绝缘部件，汇流部件用于电连接电池的电池单体；绝缘部件包覆汇流部件的至少部分。上述方案中，通过汇流部件实现多个电池单体之间的电连接，以使多个电池单体之间可串联或并联或混联在一起。绝缘部件包覆汇流部件的至少部分，对汇流部件具有绝缘作用，提高 了电池的安全性。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的电池单体、电池等组成该用电装置的电源系统，这样，有利于提升电池性能的稳定性和电池寿命。
本申请实施例提供一种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。
以下实施例为了方便说明，以本申请一实施例的一种用电装置为车辆1000为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000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。车辆1000的内部设置有电池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。
在本申请一些实施例中，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。
请参照图2，图2为本申请一些实施例提供的电池100的爆炸图。电池100包括箱体10和电池单体20。在一些实施例中，箱体10可以包括上盖10a和下盖10b，上盖10a与下盖10b相互盖合，上盖10a和下盖10b共同限定出用于容纳电池单体20的容纳空间。下盖10b可以为一端开口的空心结构，上盖10a可以为板状结构，上盖10a盖合于下盖10b的开口侧，以使上盖10a与下盖10b共同限定出容纳空间；上盖10a和下盖10b也可以是均为一侧开口的空心结构，上盖10a的开口侧盖合于下盖10b的 开口侧。当然，上盖10a和下盖10b形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
图3为图2所示的电池模块400的结构示意图。在电池100中，电池单体20可以是多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内；当然，电池100也可以是多个电池单体20先串联或并联或混联组成电池模块400形式，多个电池模块400再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体20之间的电连接。
其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图4，图4为本申请一些实施例提供的电池单体20的分解结构示意图。电池单体20是指组成电池的最小单元。如图3，电池单体20包括有端盖21、壳体22、电极组件23以及其他的功能性部件。
端盖21是指盖合于壳体22的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖21的形状可以与壳体22的形状相适应以配合壳体22。可选地，端盖21可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖21在受挤压碰撞时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性能也可以有所提高。端盖21上可以设置有如电极端子26等的功能性部件。电极端子26可以用于与电极组件23电连接，以用于输出或输入电池单体20的电能。在一些实施例中，端盖21上还可以设置有用于在电池单体20的内部压力或温度达到阈值时泄放内部压力的泄压机构。端盖21的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在端盖21的内侧还可以设置有绝缘件，绝缘件可以用于隔离壳体22内的电连接部件与端盖21，以降低短路的风险。示例性的，绝缘件可以是塑料、橡胶等。
壳体22是用于配合端盖21以形成电池单体20的内部环境的组件，形成的内部环境可以用于容纳电极组件23、电解液以及其他部件。壳体22和端盖21可以是独立的部件，可以于壳体22上设置开口，通过在开口处使端盖21盖合开口以形成电池单体20的内部环境。在一些示例中，壳体22为一侧开口的空心结构，端盖21为一个并盖合于壳体22的开口。在另一些示例中，壳体22为两侧开口的空心结构，端盖21为两个，两个端盖21分别盖合于壳体22的两个开口。不限地，也可以使端盖21和壳体22一体化，具体地，端盖21和壳体22可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体22的内部时，再使端盖21盖合壳体22。壳体22可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体22的形状可以根据电极组件23的具体形状和尺寸大小来确定。壳体22的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
电极组件23是电池单体20中发生电化学反应的部件。壳体22内可以包含一个或更多个电极组件23。电极组件23主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件23的主体，正极片和负极片不具有活性物质的部分各自构成极耳。正极极耳和负极极耳可以共同位于主体的一端或是分别位于主体的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接电极端子26以形成电流回路。
图5为本申请一些实施例提供的连接组件与电池单体的装配示意图；图6为本申请一些实施例提供的连接组件的分解示意图。如图5和图6所示，第一方面，本申请实施例提供了一种电池的连接组件30，包括汇流部件31和绝缘部件32，汇流部件31用于电连接电池的电池单体20；绝缘部件32包覆汇流部件31的至少部分。
汇流部件31与多个电池单体20的电极端子26连接，以通过汇流部件31实现多个电池单体20之间的电连接，以使多个电池单体20之间可串联或并联或混联在一起。具体的，各电池单体20包括正极电极端子和负 极电极端子。在电池模块400中，相邻的电池单体20之间通过汇流部件31连接。例如，当电池单体20串联时，一个电池单体20的正极电极端子和另一个电池单体20的负极电极端子通过汇流部件31连接；或者，当电池单体20并联时，一个电池单体20的正极电极端子和另一个电池单体20的负极电极端子通过汇流部件31连接。
绝缘部件32可设置于电池模块400具有汇流部件31的一侧，以能够包覆至少部分汇流部件31。此外，绝缘部件32还可以覆盖整个电池模块400，以对电池模块400进行绝缘保护。
上述方案中，绝缘部件32包覆汇流部件31的至少部分，对汇流部件31具有绝缘作用，提高了电池的安全性。
在一些实施例中，绝缘部件32包括层叠设置的第一绝缘件321和第二绝缘件322，汇流部件31的至少部分位于第一绝缘件321和第二绝缘件322之间，且汇流部件31固定于第一绝缘件321和第二绝缘件322中的至少一者。
第一绝缘件321相对第二绝缘件322靠近电池单体20设置，第二绝缘件322位于第一绝缘件321的上方，至少部分汇流部件31被夹设在第一绝缘件321和第二绝缘件322之间。汇流部件31可固定于第一绝缘件321或第二绝缘件322，还可以与第一绝缘件321以及第二绝缘件322分别固定。可选的，第一绝缘件321与第二绝缘件322的面积相同，能够覆盖所有的电池模块400。例如所有电池模块400组成一个电池模组，第一绝缘件321和第二绝缘件322的面积尺寸与电池模组的顶面匹配。
上述方案中，第一绝缘件321和第二绝缘件322能够使电池单体20与外部绝缘，提高电池的安全性。而且汇流部件31固定于第一绝缘件321和第二绝缘件322中的至少一者，避免将汇流部件31通过其他集成板连接，而是直接采用第一绝缘件321和/或第二绝缘件322作为载体用于固定汇流部件31，减小了电池的高度尺寸，实现电池的轻量化设计，而且减少了工艺制备工序，提高了制备效率。汇流部件31的至少部分被夹设于第一绝缘件321和第二绝缘件322之间，提高了汇流部件31的连接牢固性，增强了电池的稳定性。
在一些实施例中，绝缘部件32还包括第三绝缘件323，第三绝缘件323位于汇流部件31与第二绝缘件322之间。
上述方案中，第三绝缘件323包覆至少部分汇流部件31，且第三绝缘件323被夹设于第一绝缘件321和第二绝缘件322之间，使得第三绝缘件323不易离开汇流部件31，当电池热失控时，若第一绝缘件321和第二绝缘件322受损，喷阀气流不易将第三绝缘件323掀开，或高温喷出物将第三绝缘件323烧毁、破坏，第三绝缘件323对汇流部件31进行绝缘保护，防止汇流部件31裸露，喷出物将汇流部件31搭接，出现高压拉弧现象。
在一些实施例中，第三绝缘件323的面积分别小于第一绝缘件321和第二绝缘件322的面积，第三绝缘件323对应汇流部件31设置。
第一绝缘件321和第二绝缘件322的面积尺寸可相等，第三绝缘件323的面积尺寸可相对设置的更小。第三绝缘件323的面积尺寸可与汇流部件31相匹配，以覆盖汇流部件31。
上述方案中，第一绝缘件321和第二绝缘件322的面积较大，对电池单体20的绝缘效果更好，第三绝缘件323与汇流部件31对应设置，可保证第三绝缘件323对汇流部件31的保护效果。
在一些实施例中，第三绝缘件323的熔点分别大于第一绝缘件321和第二绝缘件322的熔点。
第三绝缘件323可采用云母纸和TC复合带(Teflon Composite，聚四氟乙烯复合材料)，能实现耐受1000℃以上的高温。第一绝缘件321和第二绝缘件322可采用PET(聚对苯二甲酸乙二醇酯)塑料。
上述方案中，若电池热失控，第一绝缘件321和第二绝缘件322被烧熔，由于第三绝缘件323的熔点较高，可防止高温喷出物将第三绝缘件323烧毁、破坏，可保证第三绝缘件323能够保护汇流部件31。
请结合参阅图6和图7，图6为本申请一些实施例提供的连接组件的分解示意图；图7为本申请一些实施例提供的连接组件的结构示意图。在一些实施例中，第二绝缘件322上设置有第一过孔322a，第三绝缘件323上设置有第二过孔323a，第一过孔322a和第二过孔323a对应设置。
上述方案中，第一过孔322a和第二过孔323a均为将汇流部件31与 电池单体20激光焊接时，供激光穿过的过孔。第一过孔322a位于第二过孔323a的上方，采用激光焊接将汇流部件31与电池单体20连接时，激光依次穿过第一过孔322a和第二过孔323a。通过激光焊接，保证了汇流部件31与电池单体20之间的连接牢固性。
在一些实施例中，第二过孔323a的尺寸小于第一过孔322a的尺寸。
第二过孔323a的尺寸大于汇流部件31与电池单体20的焊接轨迹，可选择只略大于该焊接轨迹即可，既保证了汇流部件31与电池单体20之间的焊接面积，又能减小第二过孔323a的尺寸。需要说明的是，上述尺寸指的是第二过孔323a的直径和第一过孔322a的直径。
上述方案中，第一过孔322a的尺寸较大，可便于激光焊接时激光穿过，第二过孔323a的尺寸较小，可减小汇流部件31的裸露面积，提高电池的安全性。
在一些实施例中，第二过孔323a的数量为多个，在第一绝缘件321和第二绝缘件322的层叠方向上，多个第二过孔323a的投影位于第一过孔322a内。
一个汇流部件31对应多个第二过孔323a，多个第二过孔323a的设置，可增加汇流部件31的焊接位置，进一步提高汇流部件31与电池单体20之间的连接稳固性。一个第一过孔322a对应多个第二过孔323a，第一过孔322a的数量可少于第二过孔323a的数量，便于第二绝缘件322上的第一过孔322a的开设。
如图8所示，图8为本申请另一些实施例提供的连接组件的分解示意图。在一些实施例中，连接组件30包括至少一个汇流列310，汇流列310包括多个沿第一方向X间隔设置的汇流部件31；第三绝缘件323覆盖汇流列310的多个汇流部件31。
上述方案中，第三绝缘件323沿第一方向X延伸，可覆盖多个汇流部件31，以对沿第一方向X排布的多个汇流部件31进行绝缘保护。沿第一方向X增加了汇流部件31的数量，可对应增加沿第一方向X电池单体20的数量，通过多个汇流部件31实现这些电池单体20之间的串联、并联或混联，提高了电池容量。第三绝缘件323覆盖汇流列310的多个汇流部 件31，无需每个汇流部件31均单独对应设置第三绝缘件323，便于工艺制备。需要说明的是，本申请实施例的第一方向X为连接组件30的长度方向。
在一些实施例中，汇流列310为多个，多个汇流列310沿第二方向Y间隔设置，第三绝缘件323为多个，多个第三绝缘件323与多个汇流列310一一对应设置；其中，第一方向X与第二方向Y相交设置。
可选的，第一方向X与第二方向Y可互相垂直。汇流列310的数量可根据需要设置，例如沿第二方向Y可设置两排电池单体20，对应设置了四个汇流列310，每排电池单体20设置两组汇流列310。需要说明的是，本申请实施例的第二方向Y为连接组件30的宽度方向。
上述方案中，沿第二方向Y增加了汇流列310的数量，可对应增加沿第二方向Y电池单体20的数量，进一步提高了电池容量。
在一些实施例中，多个汇流列310均设置于第一绝缘件321，便于回流列的装配，提高了装配效率。
在一些实施例中，第一绝缘件321上设置有第三过孔321a，汇流部件31覆盖第三过孔321a，汇流部件31的部分露出于第三过孔321a以与电池单体20电连接。
上述方案中，通过第三过孔321a可使汇流部件31露出，与电池单体20接触，便于通过激光焊接实现汇流部件31与电池单体20之间的连接。在其它实施例中，也可以将多个汇流列310均设置于第二绝缘件322。
在一些实施例中，绝缘部件32为热压成型件。第一绝缘件321、第二绝缘件322和第三绝缘件323可均为绝缘膜，具有良好的绝缘性、耐腐蚀性、耐温、延展性等，可直接选用耐高温的绝缘膜热压成型成一体，从而避免繁琐的制备工序。
上述方案中，通过热压成型可将汇流部件31稳固地连接于绝缘部件32，提高了连接组件30的连接稳定性，且提高了制备效率。
本申请第二方面的实施例提供一种电池，包括电池单体20以及上述任一实施方式的连接组件30，汇流部件31与电池单体20电连接。
本申请第三方面的实施例提供一种用电装置，包括上述电池，电池 用于提供电能。
根据本申请的一些实施例，本申请提供了一种电池的连接组件30，包括汇流部件31和绝缘部件32，汇流部件31用于电连接电池的电池单体20；绝缘部件32包覆汇流部件31的至少部分。绝缘部件32包括层叠设置的第一绝缘件321和第二绝缘件322，汇流部件31的至少部分位于第一绝缘件321和第二绝缘件322之间，且汇流部件31固定于第一绝缘件321和第二绝缘件322中的至少一者。绝缘部件32还包括第三绝缘件323，第三绝缘件323位于汇流部件31与第二绝缘件322之间。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，但这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (14)

  1. 一种电池的连接组件，其特征在于，包括：
    汇流部件，用于电连接所述电池的电池单体；以及
    绝缘部件，包覆所述汇流部件的至少部分。
  2. 根据权利要求1所述的连接组件，其中，所述绝缘部件包括层叠设置的第一绝缘件和第二绝缘件，所述汇流部件的至少部分位于所述第一绝缘件和所述第二绝缘件之间，且所述汇流部件固定于所述第一绝缘件和所述第二绝缘件中的至少一者。
  3. 根据权利要求2所述的连接组件，其中，所述绝缘部件还包括第三绝缘件，所述第三绝缘件位于所述汇流部件与所述第二绝缘件之间。
  4. 根据权利要求3所述的连接组件，其中，所述第三绝缘件的面积分别小于所述第一绝缘件和第二绝缘件的面积，所述第三绝缘件对应所述汇流部件设置。
  5. 根据权利要求3所述的连接组件，其中，所述第三绝缘件的熔点分别大于所述第一绝缘件和第二绝缘件的熔点。
  6. 根据权利要求3所述的连接组件，其中，所述第二绝缘件上设置有第一过孔，所述第三绝缘件上设置有第二过孔，所述第一过孔和所述第二过孔对应设置。
  7. 根据权利要求6所述的连接组件，其中，所述第二过孔的尺寸小于所述第一过孔的尺寸。
  8. 根据权利要求3所述的连接组件，其中，所述连接组件包括至少一个汇流列，所述汇流列包括多个沿第一方向间隔设置的所述汇流部件；所述第三绝缘件覆盖所述汇流列的多个所述汇流部件。
  9. 根据权利要求8所述的连接组件，其中，所述汇流列为多个，多个所述汇流列沿第二方向间隔设置，所述第三绝缘件为多个，多个所述第三绝缘件与多个所述汇流列一一对应设置；其中，所述第一方向与第二方向相交设置。
  10. 根据权利要求8所述的连接组件，其中，多个所述汇流列均设置于 所述第一绝缘件。
  11. 根据权利要求2所述的连接组件，其中，所述第一绝缘件上设置有第三过孔，所述汇流部件覆盖所述第三过孔，所述汇流部件的部分露出于所述第三过孔以与所述电池单体电连接。
  12. 根据权利要求1-11中任一项所述的连接组件，其中，所述绝缘部件为热压成型件。
  13. 一种电池，包括：
    电池单体；以及
    根据权利要求1-12中任一项所述的连接组件，所述汇流部件与所述电池单体电连接。
  14. 一种用电装置，其中，包括根据权利要求13所述的电池，所述电池用于提供电能。
PCT/CN2022/105735 2022-07-14 2022-07-14 电池的连接组件、电池及用电装置 WO2024011505A1 (zh)

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Publication number Priority date Publication date Assignee Title
CN207409537U (zh) * 2017-08-30 2018-05-25 杭州捷能科技有限公司 一种电池模组
CN109103405A (zh) * 2018-08-19 2018-12-28 江西赣锋电池科技有限公司 一种电池包母排、制备方法及电池包
CN210182438U (zh) * 2019-08-02 2020-03-24 深圳数翔科技有限公司 风冷电池模组
US20200203941A1 (en) * 2018-12-21 2020-06-25 Nio Usa, Inc. Laminate busbars for battery module design
CN112086604A (zh) * 2020-10-19 2020-12-15 江苏时代新能源科技有限公司 电池、用电设备、制备电池的方法和装置
CN114583399A (zh) * 2020-11-30 2022-06-03 三星Sdi株式会社 电池组

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207409537U (zh) * 2017-08-30 2018-05-25 杭州捷能科技有限公司 一种电池模组
CN109103405A (zh) * 2018-08-19 2018-12-28 江西赣锋电池科技有限公司 一种电池包母排、制备方法及电池包
US20200203941A1 (en) * 2018-12-21 2020-06-25 Nio Usa, Inc. Laminate busbars for battery module design
CN210182438U (zh) * 2019-08-02 2020-03-24 深圳数翔科技有限公司 风冷电池模组
CN112086604A (zh) * 2020-10-19 2020-12-15 江苏时代新能源科技有限公司 电池、用电设备、制备电池的方法和装置
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