Battery and electrical device

Abstract

The present application discloses a battery and an electrical device. The battery comprises cells, a temperature sampling member, a circuit board, and an electrical connecting member; the temperature sampling member is used for collecting the temperature of the cells; the battery further comprises an electrical connecting member; the electrical connecting member is used for being electrically connected to the temperature sampling member and the circuit board; and the temperature sampling member and the circuit board are welded to the electrical connecting member, respectively. The production efficiency of the battery can be improved.

Description

Batteries and electrical equipment CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202420422996.4, filed on March 5, 2024, entitled “Batteries and Electrical Equipment,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of batteries, and in particular to a battery and electrical equipment. Background Art

[0003] With the development of new energy technologies, batteries are being used more and more widely. Batteries have high energy density, high safety, long service life, and are environmentally friendly to the social environment. They have been widely used in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery swap stations, engineering manufacturing, smart devices, etc. At the same time, they also promote technological development and research in communication terminals, medical devices, energy development, etc.

[0004] As the demand for batteries expands, how to improve battery production efficiency has become a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The embodiments of the present application provide a battery and an electrical device that can effectively improve the production efficiency of the battery.

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising a battery cell, a temperature sampling component, a circuit board, and an electrical connector, wherein the temperature sampling component is used to collect the temperature of the battery cell; the electrical connector is used to electrically connect the temperature sampling component and the circuit board, and the temperature sampling component is reflow-solderably connected to the electrical connector.

[0007] In the above technical solution, by adding an electrical connector to serve as a transition between the temperature sampling component and the circuit board, the electrical connector and the temperature sampling component can be pre-connected using reflow soldering to form an assembly. The electrical connection between the temperature sampling component and the circuit board can then be established by connecting the electrical connector to the circuit board. This allows the reflow soldering step to be separated from the connection step between the circuit board and the temperature sampling component, speeding up the overall production cycle and significantly improving battery production efficiency.

[0008] In some embodiments, the electrical connector is a flexible circuit board.

[0009] In the above technical solution, the electrical connector is a flexible circuit board, which facilitates the preparation of the electrical connector.

[0010] In some embodiments, the temperature sampling component has a first terminal and a second terminal; the flexible circuit board includes a first conductive member, a second conductive member, a first insulating film and a second insulating film, the first insulating film and the second insulating film are stacked, the first conductive member and the second conductive member are arranged between the first insulating film and the second insulating film, one end of the first conductive member is welded to the circuit board, and the other end is reflow-connected to the first terminal; one end of the second conductive member is welded to the circuit board, and the other end is reflow-connected to the second terminal.

[0011] In the above technical solution, the first insulating film and the second insulating film cover the first conductive member and the second conductive member, which can reduce the risk of battery short circuit.

[0012] In some embodiments, the first insulating film is provided with a first opening and a second opening, the first conductive member has a first exposed area exposed from the first opening, and the first exposed area is welded to the circuit board; the second conductive member has a second exposed area exposed from the second opening, and the second exposed area is welded to the circuit board.

[0013] In the above technical solution, the first insulating film is provided with a first opening to facilitate welding the first conductive member to the circuit board through the first exposed area, and the first insulating film is provided with a second opening to facilitate welding the second conductive member to the circuit board through the second exposed area.

[0014] In some embodiments, the first conductive member is welded to the circuit board to form a first weld mark, and the second conductive member is welded to the circuit board to form a second weld mark. Both the first weld mark and the second weld mark are coated with a first colloid.

[0015] In the above technical solution, the first weld mark and the second weld mark are both coated with the first colloid, which can reduce the risk of liquid or foreign matter affecting the welding position and causing temperature sampling failure.

[0016] In some embodiments, the battery further includes a busbar and a bracket, the busbar is used to achieve electrical connection of the plurality of battery cells, the bracket is an insulating member, and the bracket is mounted on the busbar; wherein the temperature sampling component is fixed to the bracket.

[0017] In the above technical solution, the temperature sampling piece is fixed to the bracket, and the bracket is installed on the manifold, which is conducive to fixing the bracket to the manifold, thereby stabilizing the temperature of the temperature sampling piece, reducing the risk of displacement of the temperature sampling piece, and improving the sampling quality of the temperature sampling piece.

[0018] In some embodiments, the bracket is riveted to the busbar.

[0019] In the above technical solution, the bracket and the busbar are riveted together, which facilitates the assembly of the bracket and the busbar, and the connection between the bracket and the busbar is highly stable.

[0020] In some embodiments, a protrusion is provided on a side of the bracket facing the current collector, and the bracket abuts against the current collector through the protrusion.

[0021] In the above technical solution, the protrusion can reduce the contact area between the bracket and the current collector, thereby reducing the influence of the temperature of the current collector on the temperature sampling element.

[0022] In some embodiments, the bracket is injection molded on the end of the electrical connector where the temperature sampling component is provided.

[0023] In the above technical solution, the bracket is injection-molded on the end of the electrical connector where the temperature sampling component is provided, so as to facilitate the connection between the electrical connector and the bracket.

[0024] In some embodiments, a groove is formed on a side of the bracket facing the current collector, and at least a portion of the temperature sampling element is accommodated in the groove.

[0025] In the above technical solution, at least a portion of the temperature sampling element is accommodated in the recess. This can, on the one hand, reduce the protrusion of the temperature sampling element from the bracket, thus reducing the space occupied by the temperature sampling element and the bracket as a whole; on the other hand, it can reduce the risk of the temperature sampling element contacting the busbar, causing the temperature of the busbar to affect the temperature sampling element and thus inaccurate temperature data collected from the battery cells.

[0026] In some embodiments, the battery further includes a second colloid, and the second colloid fills the groove and covers the temperature sampling component.

[0027] In the above technical solution, the second colloid seals the temperature sampling component, which can reduce the risk of liquid or foreign matter affecting the temperature sampling component and causing the temperature sampling component to fail in sampling the battery cell temperature.

[0028] In some embodiments, the bracket is disposed between the battery cell and the busbar.

[0029] In the above technical solution, the bracket is arranged between the battery cell and the busbar, and the busbar can press the bracket to alleviate the displacement of the bracket, thereby reducing the risk of sampling failure caused by displacement of the temperature sampling component.

[0030] In some embodiments, the battery further includes a bracket, the temperature sampling component is fixed to the bracket, and the bracket is an injection-molded plate and is located at one end of the electrical connector where the temperature sampling component is provided.

[0031] In the above technical solution, the temperature sampling component is fixed to the bracket, and the bracket is installed on the electrical connector, which is conducive to the electrical connector fixing the bracket, thereby stabilizing the temperature of the temperature sampling component, reducing the risk of displacement of the temperature sampling component, and improving the sampling quality of the temperature sampling component.

[0032] In some embodiments, the bracket further includes a groove, and at least a portion of the temperature sampling component is accommodated in the groove.

[0033] In the above technical solution, at least a portion of the temperature sampling component is accommodated in the groove, which can reduce the size of the temperature sampling component protruding from the bracket and reduce the space occupied by the temperature sampling component and the bracket as a whole.

[0034] In some embodiments, the battery further includes a second colloid, and the second colloid fills the groove and covers the temperature sampling component.

[0035] In the above technical solution, the second colloid seals the temperature sampling component, which can reduce the risk of liquid or foreign matter affecting the temperature sampling component and causing the temperature sampling component to fail in sampling the battery cell temperature.

[0036] In some embodiments, the battery further includes a heat conductor, and the heat conductor is disposed between the bracket and the battery cell.

[0037] In the above technical solution, the heat conductor transfers heat between the battery cell and the temperature sampling element. The heat conductor has high thermal conductivity, which can improve the heat transfer efficiency between the battery cell and the temperature sampling element and improve the accuracy of the data collected by the temperature sampling element.

[0038] In a second aspect, an embodiment of the present application provides an electric device, which includes the battery provided in the embodiment of the first aspect, and the battery is used to power the electric device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0040] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0041] FIG2 is an exploded schematic diagram of a battery according to some embodiments of the present application;

[0042] FIG3 is an exploded schematic diagram of batteries according to other embodiments of the present application;

[0043] FIG4 is a schematic diagram of a partial structure of a battery according to some embodiments of the present application;

[0044] FIG5 is a schematic diagram of the structure of the temperature sampling component and the circuit board being welded to the electrical connector respectively according to some embodiments of the present application;

[0045] FIG6 is a schematic diagram of the structure of a temperature sampling component and an electrical connector according to some embodiments of the present application;

[0046] FIG7 is an exploded schematic diagram of an electrical connector according to some embodiments of the present application;

[0047] FIG8 is an enlarged view of portion A in FIG6 ;

[0048] FIG9 is a schematic structural diagram of the circuit board in FIG5 ;

[0049] FIG10 is a schematic diagram of a groove filled with a second colloid in some embodiments of the present application;

[0050] FIG11 is an exploded schematic diagram of batteries according to some further embodiments of the present application;

[0051] In the drawings, the drawings are not drawn to scale.

[0052] Marking instructions: 10 - battery cell; 11 - end cap; 12 - electrode terminal; 20 - housing; 21 - first part; 22 - second part; 23 - accommodation space; 30 - temperature sampling element; 31 - first terminal; 32 - second terminal; 40 - circuit board; 41 - first sampling harness; 42 - second sampling harness; 43 - third opening; 44 - fourth opening; 50 - electrical connector; 5111 - first weld mark; 511 - first exposed area; 51 - first conductive element ;5211-second weld mark; 521-second exposed area; 52-second conductive member; 531-first opening; 532-second opening; 53-first insulating film; 54-second insulating film; 60-bus; 61-through hole; 64-bore; 70-isolating plate; 80-thermal conductive member; 90-bracket; 91-groove; 92-convex portion; 93-second colloid; 100-battery; 1000-vehicle; 200-controller; 300-motor; X-first direction. DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0055] References to "embodiments" in this application mean 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 appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0057] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0058] The term "or" in this application is merely a description of the association relationship between associated objects, indicating that two relationships may exist. For example, A or B can represent two situations: A exists alone, and B exists alone.

[0059] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0060] The term "plurality" used in this application refers to two or more (including two).

[0061] In this application, battery cells may include, but are not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries. Battery cells include, but are not limited to, cylindrical, flat, rectangular, or other shapes. Battery cells are generally packaged in cylindrical, prismatic, and soft-pack shapes.

[0062] A battery cell consists of an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrodes. Metal ions (such as lithium ions) are inserted and removed from the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0063] The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab.

[0064] Taking lithium-ion batteries as an example, the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0065] The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as the negative electrode tab.

[0066] The negative electrode current collector can be a metal foil or a composite current collector. For example, the metal foil can be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium. The negative electrode active material can be carbon or silicon, for example.

[0067] To ensure high current flow without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene). Furthermore, the electrode assembly can be either a wound or laminated structure.

[0068] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing for enclosing one or more battery cells. The casing can reduce the effects of liquids or other foreign matter on the charging or discharging of the battery cells.

[0069] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0070] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0071] In some embodiments, multiple battery cells can be first integrated into at least one battery module, which is then installed in a housing to form a battery pack. In this embodiment, auxiliary structural members such as crossbeams can be installed between the battery modules to improve the stability of the battery module installation in the housing.

[0072] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0073] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0074] In a battery, a temperature sensor is soldered to the circuit board to establish an electrical connection. The sensor collects the temperature of each cell, and the circuit board transmits the temperature signal to the battery management system for battery monitoring. The temperature sensor is an electronic component, and due to the influence of the assembly process and materials used, the temperature sensor and circuit board are typically soldered using reflow soldering.

[0075] Since several temperature sampling components usually need to be connected to the circuit board to set several temperature detection points in a corresponding group of battery cells, and the reflow soldering process takes a long time, the circuit board takes a long time to pass through the reflow soldering furnace, resulting in a small number of finished soldering products of the circuit board and the temperature sampling components per unit time, a slow production cycle, and low battery production efficiency.

[0076] In view of this, in order to solve the problem of low battery production efficiency due to the long time it takes for the circuit board to pass through the reflow oven, an embodiment of the present application provides a battery, in which an electrical connector is used to transfer the temperature sampling component and the circuit board, and the electrical connector and the temperature sampling component are connected by reflow soldering to form an assembly, which is then connected to the circuit board by the electrical connector.

[0077] By providing an electrical connector for transfer, when several temperature sampling components need to be connected to the circuit board, multiple electrical connectors can be pre-assembled with multiple temperature sampling components using reflow soldering; then, in the step of connecting the circuit board and the temperature sampling components, the electrical connector is connected to the circuit board to form a transfer without the need for reflow soldering. The two steps can be performed independently, and the reflow soldering process can be separated from the final assembly step of the circuit board and the temperature sampling components, thereby greatly improving the production efficiency of the battery.

[0078] The technical solutions disclosed in the embodiments of the present application are applicable to, but not limited to, batteries and electrical equipment using batteries.

[0079] Electrically powered equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be fuel-powered, gas-powered, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles. Spacecraft include aircraft, rockets, space shuttles, and spacecraft. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0080] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0081] Please refer to FIG1 , which is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of the present application. A battery 100 is disposed inside the vehicle 1000 . 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 serve as an operating power source for the vehicle 1000 .

[0082] The vehicle 1000 may further include a controller 200 and a motor 300 . The controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0083] In some embodiments of the present application, the battery 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0084] In some embodiments, please refer to FIG. 2 , which is an exploded schematic diagram of a battery 100 according to some embodiments of the present application. The battery 100 includes a plurality of battery cells 10. The plurality of battery cells 10 may be connected in series, in parallel, or in a hybrid connection. The term "hybrid connection" refers to the connection of the plurality of battery cells 10 in both series and parallel.

[0085] In some embodiments, the battery 100 may further include a busbar 60 (mentioned later), and the multiple battery cells 10 may be electrically connected via the busbar 60 to achieve series connection, parallel connection, or mixed connection of the multiple battery cells 10 .

[0086] The busbar 60 may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0087] In some embodiments, the battery 100 may further include a housing 20 for accommodating the battery cells 10. The housing 20 may include a first portion 21 and a second portion 22, which overlap to define a receiving space 23 for accommodating the battery cells 10. The connection between the first portion 21 and the second portion 22 may be sealed by a sealing element (not shown), such as a sealing ring or sealant.

[0088] The first portion 21 and the second portion 22 can have various shapes, such as a cuboid, a cylinder, etc. The first portion 21 can be a hollow structure with one side open, and the second portion 22 can also be a hollow structure with one side open. The open side of the second portion 22 covers the open side of the first portion 21, thereby forming the box 20 with the accommodating space 23. Of course, the first portion 21 can also be a hollow structure with one side open, and the second portion 22 can be a plate-like structure. The second portion 22 covers the open side of the first portion 21, thereby forming the box 20 with the accommodating space 23.

[0089] An embodiment of the present application provides a battery 100 that can improve the production efficiency of the battery 100. The specific structure of the battery 100 is described in detail below with reference to the accompanying drawings.

[0090] FIG3 is an exploded schematic diagram of a battery 100 according to some other embodiments of the present application; FIG4 is a partial structural schematic diagram of a battery 100 according to some embodiments of the present application; and FIG5 is a structural schematic diagram of a temperature sampling component 30 and a circuit board 40 welded to an electrical connector 50 according to some embodiments of the present application.

[0091] 3 to 5 , an embodiment of the present application provides a battery 100 including a battery cell 10, a temperature sampling component 30, a circuit board 40, and an electrical connector 50. The temperature sampling component 30 is used to collect the temperature of the battery cell 10; the electrical connector 50 is used to electrically connect the temperature sampling component 30 and the circuit board 40. The temperature sampling component 30 and the electrical connector 50 are connected by reflow soldering.

[0092] The battery cell 10 may include an end cap 11 and an electrode terminal 12. The electrode terminal 12 may be disposed on the end cap 11. Other functional components may also be disposed on the end cap 11, such as a pressure relief mechanism (not shown).

[0093] The circuit board 40 is a core component of the battery 100. In addition to the temperature sampling element 30, the circuit board 40 may also include temperature sampling circuits, voltage sampling circuits, and other components. The circuit board 40 transmits data signals collected by the temperature sampling element 30 to the battery 100 management system, thereby facilitating management and monitoring of the battery 100.

[0094] The circuit board 40 may be a flexible circuit board, which is a sheet-like electronic component that uses polyimide film or polyamide ester film as a substrate, manufactures conductive tracks on a metal foil through chemical etching technology, and covers the surface with a protective layer.

[0095] The temperature sampling component 30 is a component for collecting the temperature of the battery cell 10. The temperature sampling component 30 can be in contact with the end cover 11 of the battery cell 10 to collect the temperature of the battery cell 10. Optionally, the temperature sampling component 30 is an NTC thermistor.

[0096] The electrical connector 50 is a component for electrically connecting the temperature sampling component 30 to the circuit board 40. The temperature sampling component 30 is electrically connected to the circuit board 40 to transmit a temperature data signal.

[0097] The temperature sampling component 30 and the electrical connector 50 are connected by reflow soldering. Reflow soldering refers to the circulation of high-temperature gas in a reflow oven to achieve the purpose of soldering. Specifically, solder paste can be pre-set as a soldering point at the end of the electrical connector 50 to be connected to the temperature sampling component. In the reflow oven, the hot air flow heats the soldering point between the temperature sampling component 30 and the electrical connector 50, causing the solder paste to melt or melt under a certain high-temperature air flow, thereby connecting the temperature sampling component 30 to the electrical connector 50. The reflow oven has high soldering efficiency and can simultaneously reflow solder multiple temperature sampling components 30 and multiple electrical connectors 50, respectively, to achieve mass production.

[0098] In a reflow oven, the gas inside can be heated and circulated using a heater and fan, or infrared radiation and a fan can be used to heat and circulate the gas inside the oven. A reflow oven can include four temperature zones: a preheating zone, a temperature rise zone, a soldering zone, and a cooling zone. The temperature sampling component 30 and the electrical connector 50 can be sequentially conveyed through these zones via a conveyor belt. After the solder paste undergoes heating, melting, solidification, and cooling, the temperature sampling component 30 and the electrical connector 50 are soldered together.

[0099] In this embodiment, by adding an electrical connector 50 as a transition between the temperature sampling component 30 and the circuit board 40, the electrical connector 50 and the temperature sampling component 30 can be pre-connected using reflow soldering to form an assembly. If multiple temperature sampling components 30 need to be connected to the circuit board 40, multiple electrical connectors 50 can be pre-connected to multiple temperature sampling components 30 using reflow soldering to form multiple assemblies. The electrical connector 50 can then be connected to the circuit board 40 to achieve electrical connection between the temperature sampling components 30 and the circuit board 40. This allows the reflow soldering step to be separated from the step of connecting the circuit board 40 to the temperature sampling component 30, speeding up the overall production cycle and significantly improving the production efficiency of the battery 100.

[0100] It should be noted that the reflow soldering step is separate from the step of connecting the circuit board 40 to the temperature sampling component 30. This means that by adding an electrical connector 50 as a transition between the temperature sampling component 30 and the circuit board 40, the temperature sampling component 30 can be reflow soldered to the electrical connector 50 to form a pre-produced unit assembly. The pre-produced unit assembly can then be connected to the circuit board 40 via the electrical connector 50. In particular, when multiple temperature sampling components 30 are to be mounted on the circuit board 40, the reflow soldering process of connecting the temperature sampling component 30 to the electrical connector 50 and the process of connecting the electrical connector 50 to the circuit board 40 can be performed in parallel, thereby shortening production time.

[0101] In addition, the circuit board 40 and the electrical connector 50 can be connected by laser welding or a more efficient connection method.

[0102] In some embodiments, the electrical connector 50 may also be a flexible circuit board.

[0103] A flexible printed circuit board (FPC) is a highly reliable and flexible circuit board made from polyimide or polyester film. It features high wiring density, light weight, and thinness. In this embodiment, the electrical connector 50 is a FPC, which facilitates its fabrication.

[0104] FIG6 is a schematic structural diagram of a temperature sampling component 30 and an electrical connector 50 according to some embodiments of the present application; FIG7 is an exploded schematic diagram of the electrical connector 50 according to some embodiments of the present application.

[0105] Referring to Figures 6 and 7 in conjunction with Figure 5 , in some embodiments, the temperature sampling element 30 has a first terminal 31 and a second terminal 32. The flexible printed circuit board includes a first conductive member 51, a second conductive member 52, a first insulating film 53, and a second insulating film 54. The first insulating film 53 and the second insulating film 54 are stacked, with the first conductive member 51 and the second conductive member 52 disposed between the first insulating film 53 and the second insulating film 54. One end of the first conductive member 51 is soldered to the printed circuit board 40, and the other end is reflow-connected to the first terminal 31. One end of the second conductive member 52 is soldered to the printed circuit board 40, and the other end is reflow-connected to the second terminal 32.

[0106] The first conductive member 51 is a component that enables electrical connection between the first terminal 31 and the circuit board 40. The shape of the first conductive member 51 can be arranged as needed, as long as the first terminal 31 can be electrically connected to the circuit board 40. The second conductive member 52 is a component that enables electrical connection between the second terminal 32 and the circuit board 40. The shape of the second conductive member 52 can be arranged as needed, as long as the second terminal 32 can be electrically connected to the circuit board 40. Optionally, both the first conductive member 51 and the second conductive member 52 are configured as curved strip structures.

[0107] When the electrical connector 50 is a flexible printed circuit board, the first conductive member 51 and the second conductive member 52 can be conductive traces fabricated on a metal foil. The first insulating film 53 and the second insulating film 54 are components covering the outer peripheries of the first conductive member 51 and the second conductive member 52, isolating the first conductive member 51 and the second conductive member 52 from the outside. The first insulating film 53 and the second insulating film 54 can have various shapes. The first insulating film 53 and the second insulating film 54 can be provided separately or integrally formed.

[0108] In this embodiment, the first insulating film 53 and the second insulating film 54 cover the first conductive member 51 and the second conductive member 52 , which can reduce the short circuit risk of the battery 100 .

[0109] FIG8 is an enlarged view of portion A in FIG6 .

[0110] 7 , 6 and 8 , in some embodiments, the first insulating film 53 is provided with a first opening 531 and a second opening 532 , the first conductive member 51 has a first exposed area 511 exposed from the first opening 531 , and the first exposed area 511 is welded to the circuit board 40 ; the second conductive member 52 has a second exposed area 521 exposed from the second opening 532 , and the second exposed area 521 is welded to the circuit board 40 .

[0111] The first exposed area 511 is a region of the first conductive member 51 not covered by the first insulating film 53 , and the second exposed area 521 is a region of the second conductive member 52 not covered by the second insulating film 54 .

[0112] Specifically, referring to Figure 9 , which is a schematic structural diagram of the circuit board 40 in Figure 5 , the circuit board 40 includes a first sampling harness 41 and a second sampling harness 42. The outer peripheries of the first and second sampling harnesses 41, 42 may be covered with an insulating film. The insulating film is provided with a third opening 43 and a fourth opening 44. The third opening 43 exposes the portion of the first sampling harness 41 corresponding to the first exposed area 511, and the portion of the second sampling harness 42 corresponding to the second exposed area 521. This facilitates welding the first exposed area 511 to the first sampling harness 41, and the second exposed area 521 to the second sampling harness 42.

[0113] That is, one end of the first conductive member 51 is welded to the first terminal 31 of the temperature sampling component 30, and the other end of the first conductive member 51 is welded to the first sampling wire harness 41 through the first exposed area 511. The first conductive member 51 electrically connects the first terminal 31 to the first sampling wire harness 41. One end of the second conductive member 52 is welded to the second terminal 32 of the temperature sampling component 30, and the other end of the second conductive member 52 is welded to the second sampling wire harness 42 through the second exposed area 521. The second conductive member 52 electrically connects the second terminal 32 to the second sampling wire harness 42.

[0114] In this embodiment, the first insulating film 53 is provided with a first opening 531 to facilitate welding the first conductive member 51 to the circuit board 40 through the first exposed area 511 , and the first insulating film 53 is provided with a second opening 532 to facilitate welding the second conductive member 52 to the circuit board 40 through the second exposed area 521 .

[0115] To reduce the risk of short circuit between the first exposed area 511 and the second conductor, in some embodiments, along the first direction X, an end of the first conductive member 51 having the first exposed area 511 extends beyond an end of the second conductive member 52 having the second exposed area 521 .

[0116] Optionally, the first direction X is parallel to the arrangement direction of the plurality of battery cells 10 .

[0117] 5 , in some embodiments, the first conductive member 51 is welded to the circuit board 40 to form a first weld mark 5111 , and the second conductive member 52 is welded to the circuit board 40 to form a second weld mark 5211 . Both the first weld mark 5111 and the second weld mark 5211 are coated with a first colloid.

[0118] The first colloid has a sealing function and can isolate the first weld mark 5111 and the second weld mark 5211 from the outside. The material of the first colloid includes but is not limited to red glue, hot melt glue, sealant, etc.

[0119] In this embodiment, the first weld mark 5111 and the second weld mark 5211 are both coated with the first colloid, which can reduce the risk of liquid or foreign matter affecting the welding position and causing temperature sampling failure.

[0120] 4 , 5 , and 6 , in some embodiments, the battery 100 further includes a busbar 60 and a bracket 90 . The busbar 60 is used to electrically connect multiple battery cells 10 . The bracket 90 is an insulating member and is mounted on the busbar 60 . The temperature sampling element 30 is fixed to the bracket 90 .

[0121] The busbar 60 can be connected to the electrode terminals 12 of the battery cells 10 to achieve series connection, parallel connection, or mixed connection of multiple battery cells 10. The material of the busbar 60 includes but is not limited to copper, aluminum, etc. Optionally, the busbar 60 is an aluminum bar.

[0122] The bracket 90 is mounted on the busbar 60 . The bracket 90 can be mounted on the busbar 60 by means of clamping, riveting, or the like.

[0123] The material of the bracket 90 includes but is not limited to polyurethane, rubber, etc. The shape of the bracket 90 can be various, for example, circular, oval, rectangular, special-shaped, etc. Optionally, the bracket 90 is rectangular.

[0124] The temperature sampling component 30 is fixed to the bracket 90 . The bracket 90 is the installation base of the temperature sampling component 30 . The temperature sampling component 30 can be bonded to the bracket 90 .

[0125] In this embodiment, the temperature sampling member 30 is fixed to the bracket 90, and the bracket 90 is installed on the manifold 60, which facilitates the manifold 60 to fix the bracket 90, thereby stabilizing the temperature of the temperature sampling member 30, reducing the risk of displacement of the temperature sampling member 30, and improving the sampling quality of the temperature sampling member 30.

[0126] In some embodiments, the bracket 90 is riveted to the busbar 60, that is, the bracket 90 and the busbar 60 are fixed together by riveting. The riveting of the bracket 90 and the busbar 60 facilitates the assembly of the bracket 90 and the busbar 60, and the connection between the bracket 90 and the busbar 60 is stable.

[0127] 5 and 6 , a latching protrusion 64 is provided on the side of the bracket 90 facing the busbar 60. The busbar 60 is provided with a through hole 61 (as shown in FIG. 3 ) corresponding to the latching protrusion 64. The latching protrusion 64 is engaged with the through hole 61, thereby mounting the bracket 90 on the busbar 60. Optionally, the bracket 90 is provided with two latching protrusions 64.

[0128] 5 and 6 , in some embodiments, a protrusion 92 is provided on a side of the bracket 90 facing the busbar 60 , and the bracket 90 abuts against the busbar 60 via the protrusion 92 .

[0129] The protrusion 92 is a component that separates the bracket 90 from the current collector 60. The structure of the protrusion 92 includes, but is not limited to, a raised point, a raised strip, a raised column, or a combination thereof. One or more protrusions 92 may be provided. For example, in Figures 5 and 6, the protrusion 92 is a raised strip, and there are two raised strips, extending perpendicularly to each other.

[0130] In this embodiment, the protrusion 92 can reduce the contact area between the bracket 90 and the current collector 60 , thereby reducing the influence of the temperature of the current collector 60 on the temperature sampling element 30 .

[0131] In some embodiments, the bracket 90 is injection molded on the end of the electrical connector 50 where the temperature sampling component 30 is disposed.

[0132] Optionally, the bracket 90 is an injection molded plate.

[0133] The bracket 90 is injection-molded on one end of the electrical connector 50 where the temperature sampling component 30 is disposed, so as to facilitate the connection between the electrical connector 50 and the bracket 90 .

[0134] In some embodiments, a groove 91 is formed on a side of the bracket 90 facing the current collector 60 , and at least a portion of the temperature sampling element 30 is accommodated in the groove 91 .

[0135] The groove 91 can be configured as a rectangle, a circle, an ellipse, etc. Optionally, the groove 91 is a rectangular slot. In the case where the bracket 90 is provided with a plurality of protrusions 92 , the protrusions 92 can be arranged at intervals along the outer circumference of the groove 91 .

[0136] At least a portion of the temperature sampling member 30 is accommodated in the recess 91. This reduces the protrusion of the temperature sampling member 30 from the bracket 90, thereby reducing the overall space occupied by the temperature sampling member 30 and the bracket 90. Furthermore, it reduces the risk of the temperature sampling member 30 contacting the busbar 60, causing the temperature of the busbar 60 to affect the temperature sampling member 30, and thus reducing the risk of inaccurate temperature data collected from the battery cells 10.

[0137] FIG. 10 is a schematic diagram of a groove 91 filled with a second colloid 93 according to some embodiments of the present application.

[0138] 10 , in some embodiments, the battery 100 further includes a second colloid 93 . The second colloid 93 fills the groove 91 and covers the temperature sampling member 30 .

[0139] The second colloid 93 is used to isolate the temperature sampling component 30 from the outside. Covering the temperature sampling component 30 with the second colloid 93 means that the temperature sampling component 30 is not exposed. The second colloid 93 can completely fill the groove 91 or only partially fill the groove 91, as long as the temperature sampling component 30 is covered.

[0140] The material of the first colloid includes but is not limited to red glue, hot melt glue, sealant, etc.

[0141] In this embodiment, the second colloid 93 seals the temperature sampling component 30 , which can reduce the risk of liquid or foreign matter affecting the temperature sampling component 30 and causing the temperature sampling component 30 to fail in sampling the temperature of the battery cell 10 .

[0142] In some embodiments, the bracket 90 is disposed between the battery cell 10 and the busbar 60 .

[0143] The bracket 90 is disposed between the battery cell 10 and the busbar 60 . The busbar 60 can press the bracket 90 to alleviate displacement of the bracket 90 , thereby reducing the risk of sampling failure caused by displacement of the temperature sampling element 30 .

[0144] In some embodiments, the battery 100 further includes a bracket 90 , and the temperature sampling component 30 is fixed to the bracket 90 . The bracket 90 is an injection-molded plate and is located at one end of the electrical connector 50 where the temperature sampling component 30 is provided.

[0145] In this embodiment, the temperature sampling member 30 is fixed to the bracket 90, and the bracket 90 is installed on the electrical connector 50, which helps the electrical connector 50 fix the bracket 90, thereby stabilizing the temperature of the temperature sampling member 30, reducing the risk of displacement of the temperature sampling member 30, and improving the sampling quality of the temperature sampling member 30.

[0146] In some embodiments, the bracket 90 further includes a groove 91 , and at least a portion of the temperature sampling member 30 is accommodated in the groove 91 .

[0147] In this embodiment, at least a portion of the temperature sampling component 30 is accommodated in the groove 91 , which can reduce the size of the temperature sampling component 30 protruding from the bracket 90 and reduce the overall space occupied by the temperature sampling component 30 and the bracket 90 .

[0148] In some embodiments, the battery 100 further includes a second colloid 93 . The second colloid 93 fills the groove 91 and covers the temperature sampling component 30 .

[0149] In this embodiment, the second colloid 93 seals the temperature sampling element 30, thereby reducing the risk of liquid or foreign matter affecting the temperature sampling element 30, thereby causing the temperature sampling element 30 to fail to sample the temperature of the battery cell 100. Referring to FIG3 , in some embodiments, the battery 100 further includes a heat conducting element 80, which is disposed between the bracket 90 and the battery cell 10.

[0150] The thermal conductor 80 is used to improve heat transfer efficiency between the battery cell 10 and the temperature sampling element 30. It is made of a thermally conductive material. Materials for the thermal conductor 80 include, but are not limited to, thermally conductive silicone and thermally conductive grease. These materials have insulating properties and can reduce the risk of short circuits in the battery 100.

[0151] In this embodiment, the heat conducting member 80 transfers heat between the battery cell 10 and the temperature sampling member 30 . The heat conducting member 80 has high thermal conductivity, which can improve the heat transfer efficiency between the battery cell 10 and the temperature sampling member 30 and improve the accuracy of the data collected by the temperature sampling member 30 .

[0152] FIG11 is an exploded schematic diagram of a battery 100 according to yet another embodiment of the present application. Referring to FIG11 , in some embodiments, the battery 100 further includes an isolation plate 70, which is disposed between the current bus 60 and the battery cell 10. The isolation plate 70 is an insulating member. A bracket 90 is disposed between the isolation plate 70 and the current bus 60, and a thermal conductor 80 is disposed between the battery cell 10 and the isolation plate 70.

[0153] Optionally, the isolation plate 70 is a plastic plate.

[0154] An embodiment of the present application further provides an electric device, which includes the battery 100 provided in the embodiment of the first aspect, and the battery 100 is used to power the electric device.

[0155] The present application also provides a battery 100, comprising a battery cell 10, a temperature sampling component 30, a circuit board 40, an electrical connector 50, a busbar 60, a bracket 90, a first colloid, and a second colloid 93. The circuit board 40 includes a first sampling harness 41 and a second sampling harness 42. The temperature sampling component 30 is used to collect the temperature of the battery cell 10 and has a first terminal 31 and a second terminal 32. The electrical connector 50 is used to electrically connect the temperature sampling component 30 and the circuit board 40. The temperature sampling component 30 and the circuit board 40 are respectively welded to the electrical connector 50. The electrical connector 50 is a flexible circuit board and includes a first conductive member 51, a second conductive member 52, a first insulating film 53, and a second insulating film 54. The first insulating film 53 and the second insulating film 54 are stacked, with the first conductive member 51 and the second conductive member 52 disposed between the first insulating film 53 and the second insulating film 54. One end of the first conductive member 51 is welded to the first sampling harness 41, and the other end is welded to the first terminal 31. One end of the second conductive member 52 is welded to the second sampling harness 42, and the other end is welded to the second terminal 32. The first insulating film 53 is provided with a first opening 531 and a second opening 532. The first conductive member 51 has a first exposed area 511 exposed from the first opening 531, and the first exposed area 511 is welded to the first sampling harness 41. The second conductive member 52 has a second exposed area 521 exposed from the second opening 532, and the second exposed area 521 is welded to the second sampling harness 42. The first exposed area 511 is welded to the first sampling harness 41 to form a first weld mark 5111, and the second exposed area 521 is welded to the second sampling harness 42 to form a second weld mark 5211. The first weld mark 5111 and the second weld mark 5211 are both coated with a first colloid. The busbar 60 is used to achieve electrical connection of multiple battery cells 10. The bracket 90 is an insulating member mounted on the busbar 60. The bracket 90 is positioned between the battery cell 10 and the busbar 60, and the temperature sampling member 30 is secured to the bracket 90. The bracket 90 is provided with a latching protrusion 64, which engages with a through-hole 61 provided on the busbar 60. A protrusion 92 is provided on the side of the bracket 90 facing the busbar 60, through which the bracket 90 abuts the busbar 60. The bracket 90 is injection molded onto the end of the electrical connector 50 where the temperature sampling member 30 is positioned. A groove 91 is formed on the side of the bracket 90 facing the busbar 60, which accommodates the temperature sampling member 30. A second colloid 93 fills the groove 91 and covers the temperature sampling member 30. A thermal conductor 80 is provided between the bracket 90 and the battery cell 10.

[0156] The present application also provides a battery 100, comprising a battery cell 10, a temperature sampling component 30, a circuit board 40, an electrical connector 50, a bracket 90, a first colloid, and a second colloid 93. The circuit board 40 includes a first sampling harness 41 and a second sampling harness 42. The temperature sampling component 30 is used to collect the temperature of the battery cell 10 and has a first terminal 31 and a second terminal 32. The electrical connector 50 is used to electrically connect the temperature sampling component 30 and the circuit board 40. The temperature sampling component 30 and the circuit board 40 are respectively welded to the electrical connector 50. The electrical connector 50 is a flexible circuit board and includes a first conductive member 51, a second conductive member 52, a first insulating film 53, and a second insulating film 54. The first insulating film 53 and the second insulating film 54 are stacked, with the first conductive member 51 and the second conductive member 52 disposed between the first insulating film 53 and the second insulating film 54. One end of the first conductive member 51 is welded to the first sampling harness 41, and the other end is welded to the first terminal 31. One end of the second conductive member 52 is welded to the second sampling wire 42, and the other end is welded to the second terminal 32. The first insulating film 53 is provided with a first opening 531 and a second opening 532. The first conductive member 51 has a first exposed area 511 exposed from the first opening 531, which is welded to the first sampling wire 41. The second conductive member 52 has a second exposed area 521 exposed from the second opening 532, which is welded to the second sampling wire 42. The first exposed area 511 is welded to the first sampling wire 41 to form a first weld mark 5111, while the second exposed area 521 is welded to the second sampling wire 42 to form a second weld mark 5211. Both the first weld mark 5111 and the second weld mark 5211 are coated with a first colloid. The temperature sampling member 30 is fixed to the bracket 90, which is an injection-molded plate and is located at the end of the electrical connector 50 where the temperature sampling member 30 is located. The bracket 90 further includes a groove 91, in which at least a portion of the temperature sampling member 30 is accommodated. A second colloid 93 fills the groove 91 and covers the temperature sampling member 30. The heat conducting member 80 is disposed between the bracket 90 and the battery cell 10.

[0157] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0158] The above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit this application. Those skilled in the art will appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application are intended to be within the scope of protection of this application.

Claims

1. A battery comprising: Battery cells; A temperature sampling component, used to collect the temperature of the battery cell; circuit boards; The battery further includes an electrical connector, which is used to electrically connect the temperature sampling component and the circuit board. The temperature sampling component is connected to the electrical connector by reflow soldering.

2. The battery according to claim 1, wherein The electrical connector is a flexible circuit board.

3. The battery according to claim 2, wherein The temperature sampling component has a first terminal and a second terminal; The flexible circuit board includes a first conductive member, a second conductive member, a first insulating film and a second insulating film. The first insulating film and the second insulating film are stacked, and the first conductive member and the second conductive member are arranged between the first insulating film and the second insulating film. One end of the first conductive member is welded to the circuit board, and the other end is connected to the first terminal by reflow soldering; one end of the second conductive member is welded to the circuit board, and the other end is connected to the second terminal by reflow soldering.

4. The battery according to claim 3, wherein The first insulating film is provided with a first opening and a second opening, the first conductive member has a first exposed area exposed from the first opening, and the first exposed area is welded to the circuit board; the second conductive member has a second exposed area exposed from the second opening, and the second exposed area is welded to the circuit board.

5. The battery according to claim 3 or 4, wherein The first conductive member is welded to the circuit board to form a first weld mark, and the second conductive member is welded to the circuit board to form a second weld mark. Both the first weld mark and the second weld mark are coated with a first colloid.

6. The battery according to any one of claims 1 to 4, wherein: The battery further comprises: A busbar, used to achieve electrical connection of the plurality of battery cells, A bracket, the bracket being an insulating member and being mounted on the current collector; Wherein, the temperature sampling component is fixed to the bracket.

7. The battery according to claim 6, wherein The bracket is riveted to the current collector.

8. The battery according to claim 6 or 7, wherein A convex portion is provided on a side of the bracket facing the current collector, and the bracket abuts against the current collector through the convex portion.

9. The battery according to any one of claims 6 to 8, wherein: The bracket is injection-molded on one end of the electrical connector where the temperature sampling component is provided.

10. The battery according to any one of claims 6 to 9, wherein: A groove is formed on a side of the bracket facing the current collector, and at least a portion of the temperature sampling component is accommodated in the groove.

11. The battery according to claim 10, wherein The battery further includes a second colloid, which fills the groove and covers the temperature sampling component.

12. The battery according to any one of claims 6 to 11, wherein: The bracket is disposed between the battery cell and the current busbar.

13. The battery according to any one of claims 1 to 4, wherein: The battery further includes a bracket, the temperature sampling component is fixed to the bracket, the bracket is an injection-molded plate, and is located at one end of the electrical connector where the temperature sampling component is provided.

14. The battery according to claim 13, wherein The bracket further includes a groove, and at least a portion of the temperature sampling component is accommodated in the groove.

15. The battery according to claim 14, wherein The battery further includes a second colloid, which fills the groove and covers the temperature sampling component.

13. The battery according to any one of claims 1 to 12, wherein: The battery also includes a bracket, to which the temperature sampling element is fixed; A heat conducting member is disposed between the bracket and the battery cell.

14. An electrical device, wherein: The battery comprises the battery according to any one of claims 1 to 13, wherein the battery is used to power the electrical device.

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