Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment. The battery comprises a battery monomer, a temperature sampling piece, a circuit board and an electric connecting piece, wherein the temperature sampling piece is used for collecting the temperature of the battery monomer; wherein the battery further comprises an electric connecting piece, the electric connecting piece is used for electrically connecting the temperature sampling piece and the circuit board, and the temperature sampling piece and the circuit board are respectively welded with the electric connecting piece. And the production efficiency of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a battery and an electrical device. Background Art

[0002] With the development of new energy technology, batteries are being used more and more widely. Batteries have high energy density, high safety, long service life, and are green and 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 equipment, etc. At the same time, they also promote technical development and research in communications, medical equipment, energy development, etc.

[0003] As the demand for batteries expands, how to improve battery production efficiency becomes a technical problem that needs to be solved urgently. Utility Model Content

[0004] The embodiments of the present application provide a battery and an electrical device, which can effectively improve the production efficiency of the battery.

[0005] 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 soldered to the electrical connector.

[0006] In the above technical solution, by adding an electrical connector as a transition between the temperature sampling component and the circuit board, the electrical connector and the temperature sampling component can be pre-connected by reflow soldering to form an assembly, and then the electrical connector and the circuit board are connected to realize the electrical connection between the temperature sampling component and the circuit board. This allows the reflow soldering step to be separated from the step of connecting the circuit board and the temperature sampling component, speeding up the overall production cycle and greatly improving the production efficiency of the battery.

[0007] In some embodiments, the electrical connector is a flexible circuit board.

[0008] In the above technical solution, the electrical connector is a flexible circuit board, which facilitates the preparation of the electrical connector.

[0009] 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 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] In some embodiments, the first conductive member is welded to the circuit board to form a first weld mark, the second conductive member is welded to the circuit board to form a second weld mark, and the first weld mark and the second weld mark are both coated with a first colloid.

[0014] 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.

[0015] In some embodiments, the battery further comprises a busbar and a bracket, wherein the busbar is used to realize electrical connection of the plurality of battery cells, and the bracket is an insulating member, and the bracket is mounted on the busbar; wherein the temperature sampling component is fixed to the bracket.

[0016] In the above technical solution, the temperature sampling component is fixed to the bracket, and the bracket is installed on the busbar, which is conducive to the busbar 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.

[0017] In some embodiments, the bracket is riveted to the busbar.

[0018] 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.

[0019] In some embodiments, a protrusion is provided on a side of the bracket facing the busbar, and the bracket abuts against the busbar through the protrusion.

[0020] In the above technical solution, the convex portion 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.

[0021] In some embodiments, the bracket is injection molded on the end of the electrical connector where the temperature sampling component is disposed.

[0022] In the above technical solution, the bracket is injection molded on one 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.

[0023] In some embodiments, a groove is formed on a side of the bracket facing the collector, and at least a portion of the temperature sampling element is accommodated in the groove.

[0024] In the above technical solution, at least a part of the temperature sampling member is accommodated in the groove. On the one hand, it can reduce the size of the temperature sampling member protruding from the bracket, and reduce the space occupied by the temperature sampling member and the bracket as a whole; on the other hand, it can reduce the risk that the temperature sampling member contacts the busbar, and the temperature of the busbar affects the temperature sampling member, resulting in inaccurate temperature data of the collected battery cell.

[0025] In some embodiments, the battery further includes a second colloid, and the second colloid fills the groove and covers the temperature sampling component.

[0026] 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 temperature of the battery cell.

[0027] In some embodiments, the bracket is disposed between the battery cell and the busbar.

[0028] 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 failure caused by displacement of the temperature sampling component.

[0029] In some embodiments, the battery further includes a heat conductor, and the heat conductor is disposed between the bracket and the battery cell.

[0030] In the above technical solution, the heat conducting element transfers heat between the battery cell and the temperature sampling element. The heat conducting element 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.

[0031] In a second aspect, an embodiment of the present application provides an electric device, the electric device comprising the battery provided in the embodiment of the first aspect, wherein the battery is used to supply power to the electric device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0034] Figure 2 An exploded schematic diagram of a battery according to some embodiments of the present application;

[0035] Figure 3 Schematic diagrams of the exploded view of batteries of other embodiments of the present application;

[0036] Figure 4 A schematic diagram of a partial structure of a battery according to some embodiments of the present application;

[0037] Figure 5 This is a schematic diagram of the structure in which the temperature sampling component and the circuit board are respectively welded to the electrical connector in some embodiments of the present application;

[0038] Figure 6 This is a schematic diagram of the structure of the temperature sampling component and the electrical connection component of some embodiments of the present application;

[0039] Figure 7 It is an exploded schematic diagram of the electrical connector of some embodiments of the present application;

[0040] Figure 8 for Figure 6 Enlarged view of part A in the middle;

[0041] Fig. 9 for Figure 5 The structural diagram of the circuit board;

[0042] Fig.10 A schematic diagram of a groove filled with a second colloid in some embodiments of the present application;

[0043] Fig.11 Schematic diagram of the exploded view of batteries according to some other embodiments of the present application.

[0044] Icons: 10-battery cell; 11-end cover; 12-electrode terminal; 20-box; 21-first part; 22-second part; 23-accommodating space; 30-temperature sampling member; 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 member; 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-embossing; 70-isolating plate; 80-heat 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

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0047] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present 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 vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0050] The term "or" in this application is merely a description of the association relationship of associated objects, indicating that two relationships may exist. For example, A or B may represent two situations: A exists alone, and B exists alone.

[0051] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0052] The term "plurality" used in the present application refers to two or more (including two).

[0053] In the present 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, etc. Battery cells include but are not limited to cylinders, flat bodies, rectangular parallelepipeds or other shapes, etc. Battery cells generally include cylindrical battery cells, square battery cells and soft-pack battery cells, etc., according to the packaging method.

[0054] A battery cell includes 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 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. Metal ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive electrode sheet and the negative electrode sheet from short-circuiting, while allowing active ions to pass through.

[0055] 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 a positive electrode ear.

[0056] 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 collector can be a metal foil or a composite current collector. For example, as a 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 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.).

[0057] 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 a negative electrode tab.

[0058] The negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with silver-plated surface, stainless steel with silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The negative electrode active material may be carbon or silicon, etc.

[0059] In order to ensure that a large current does not melt, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly can be a winding structure or a laminated structure.

[0060] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can reduce the impact of liquid or other foreign matter on the charging or discharging of the battery cells.

[0061] 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.

[0062] 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 accommodated in the case.

[0063] In some embodiments, multiple battery cells may be first integrated into at least one battery module, and then the battery module may be installed in a box to form a battery pack. In this embodiment, auxiliary structural members such as beams may be provided between the battery modules to improve the installation stability of the battery module in the box.

[0064] 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.

[0065] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0066] In the battery, the temperature sampling component is welded to the circuit board to achieve electrical connection. The temperature sampling component collects the temperature of the cell, and the circuit board transmits the temperature signal collected by the temperature sampling component to the battery management system to detect the battery. The temperature sampling component is an electronic component. Affected by the assembly process and materials of the electronic component, the temperature sampling component and the circuit board are usually welded by reflow soldering.

[0067] Usually, several temperature sampling components need to be connected to the circuit board in order to set several temperature detection points in a corresponding group of battery cells. In addition, the reflow process takes a long time, which results in a long time for the circuit board to pass through the reflow oven. As a result, the number of finished welding products of the circuit board and the temperature sampling components per unit time is small, the production cycle is slow, and the battery production efficiency is low.

[0068] In view of this, in order to solve the problem of low battery production efficiency due to the long time the circuit board spends in 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.

[0069] By setting an electrical connector for transfer, when a plurality of temperature sensing components need to be connected to the circuit board, multiple electrical connectors can be pre-assembled with multiple temperature sensing components by reflow soldering; then in the step of connecting the circuit board and the temperature sensing components, the electrical connector is connected to the circuit board to form a transfer without reflow soldering, and 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 sensing components, thereby greatly improving the production efficiency of the battery.

[0070] The technical solutions disclosed in the embodiments of the present application are applicable to but not limited to batteries and electrical equipment using batteries.

[0071] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0072] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0073] Please refer to Figure 1 , Figure 1 1 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 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 be used as an operating power source for the vehicle 1000.

[0074] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein 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 starting, navigating, and driving the vehicle 1000 .

[0075] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0076] In some embodiments, please refer to Figure 2 , Figure 2 The battery 100 of some embodiments of the present application is an exploded schematic diagram, and the battery 100 includes a plurality of battery cells 10. The plurality of battery cells 10 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery cells 10 are connected in series and in parallel.

[0077] In some embodiments, the battery 100 may further include a busbar 60 (mentioned later), and the plurality of battery cells 10 may be electrically connected via the busbar 60 to achieve series connection, parallel connection, or mixed connection of the plurality of battery cells 10 .

[0078] The busbar 60 may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0079] In some embodiments, the battery 100 may further include a box 20, which is used to accommodate the battery cell 10. The box 20 may include a first portion 21 and a second portion 22, which cover each other to define an accommodating space 23 for accommodating the battery cell 10. Of course, the connection between the first portion 21 and the second portion 22 may be sealed by a sealing element (not shown), which may be a sealing ring, a sealant, etc.

[0080] The first part 21 and the second part 22 may be in various shapes, such as a cuboid, a cylinder, etc. The first part 21 may be a hollow structure with one side open, and the second part 22 may be a hollow structure with one side open, and the open side of the second part 22 covers the open side of the first part 21, thereby forming a box body 20 with a receiving space 23. Of course, the first part 21 may be a hollow structure with one side open, and the second part 22 may be a plate-like structure, and the second part 22 covers the open side of the first part 21, thereby forming a box body 20 with a receiving space 23.

[0081] The embodiment of the present application provides a battery 100, which 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.

[0082] Figure 3 Schematic diagrams of the exploded view of the battery 100 of some other embodiments of the present application; Figure 4 A schematic diagram of a partial structure of a battery 100 according to some embodiments of the present application; Figure 5It is a schematic structural diagram of a temperature sampling component 30 and a circuit board 40 welded to an electrical connector 50 in some embodiments of the present application.

[0083] Reference Figures 3 to 5 The 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, and the temperature sampling component 30 and the electrical connector 50 are reflow soldered.

[0084] The battery cell 10 may include an end cap 11 and an electrode terminal 12, and the electrode terminal 12 may be disposed on the end cap 11. Other functional components may also be disposed on the end cap 11, for example, a pressure relief mechanism (not shown in the figure).

[0085] The circuit board 40 is one of the core components of the battery 100. In addition to the temperature sampling component 30, the circuit board 40 may also include a temperature sampling circuit, a voltage sampling circuit, etc. The circuit board 40 can transmit the data signal collected by the temperature sampling component 30 to the battery 100 management system, thereby facilitating the management and monitoring of the battery 100.

[0086] The circuit board 40 may be a flexible circuit board, which is a sheet-like electronic component that uses a polyimide film or a polyamide film as a substrate, manufactures conductive tracks on a metal foil through chemical etching technology, and covers the surface with a protective layer.

[0087] The temperature sampling component 30 is a component for collecting the temperature of the battery cell 10. The temperature sampling component 30 may contact 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.

[0088] The electrical connector 50 is a component for realizing electrical connection between the temperature sampling component 30 and the circuit board 40. The temperature sampling component 30 is electrically connected to the circuit board 40 to transmit a temperature data signal.

[0089] The temperature sampling component 30 and the electrical connector 50 are connected by reflow soldering. The reflow soldering connection refers to the high-temperature gas circulating in the reflow soldering furnace to achieve the purpose of welding. Specifically, solder paste can be pre-set as a welding point at the end of the electrical connector 50 that needs to be connected to the temperature sampling component. In the reflow soldering furnace, the solder point between the temperature sampling component 30 and the electrical connector 50 is heated by hot air flow, so that the solder paste melts or melts under a certain high-temperature air flow, thereby connecting the temperature sampling component 30 to the electrical connector 50. The reflow soldering furnace has a high welding efficiency, and multiple temperature sampling components 30 and multiple electrical connectors 50 can be reflow soldered at the same time to achieve mass production.

[0090] In the reflow oven, the gas in the reflow oven can be heated and circulated by a heater and a fan, or infrared radiation and a fan can be used to heat and circulate the gas in the reflow oven. The reflow oven can include four temperature zones, namely, a preheating zone, a temperature rise zone, a welding zone, and a cooling zone. The temperature sampling component 30 and the electrical connector 50 can pass through these temperature zones in sequence through a conveyor belt. After the solder paste goes through the steps of heating, melting, solidification, and cooling, the temperature sampling component 30 and the electrical connector 50 are welded together.

[0091] 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 by reflow soldering to form a component. When a plurality of temperature sampling components 30 need to be connected to the circuit board 40, a plurality of electrical connectors 50 can be pre-connected with a plurality of temperature sampling components 30 by reflow soldering to form a plurality of components, and then the electrical connector 50 is connected to the circuit board 40 to achieve electrical connection between the temperature sampling component 30 and the circuit board 40. The reflow soldering step can be separated from the step of connecting the circuit board 40 with the temperature sampling component 30, which speeds up the overall production cycle, thereby greatly improving the production efficiency of the battery 100.

[0092] It should be noted that the step of reflow soldering is separated from the step of connecting the circuit board 40 with the temperature sampling component 30, which 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 and connected with the electrical connector 50 to form a unit component pre-produced, and the pre-produced unit component can be used to connect with the circuit board 40 through the electrical connector 50. In particular, when a plurality of temperature sampling components 30 need to be installed on the circuit board 40, the process of reflow soldering and connecting the temperature sampling component 30 with the electrical connector 50 and the process of connecting the electrical connector 50 with the circuit board 40 can be performed in parallel, thereby shortening the production time.

[0093] In addition, the circuit board 40 and the electrical connector 50 may be connected by laser welding or a more efficient connection method.

[0094] In some embodiments, the electrical connector 50 may also be a flexible circuit board.

[0095] The flexible circuit board is a highly reliable and extremely flexible circuit board made of polyimide or polyester film as a substrate. The flexible circuit board has the characteristics of high wiring density, light weight and thin thickness. In this embodiment, the electrical connector 50 is a flexible circuit board, which facilitates the preparation of the electrical connector 50.

[0096] Figure 6 It is a schematic diagram of the structure of the temperature sampling component 30 and the electrical connecting component 50 of some embodiments of the present application; Figure 7 It is a schematic exploded view of the electrical connector 50 according to some embodiments of the present application.

[0097] Reference Figure 6 and Figure 7 , and combined with reference Figure 5 In some embodiments, the temperature sampling element 30 has a first terminal 31 and a second terminal 32. The flexible circuit board includes a first conductive element 51, a second conductive element 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, and the first conductive element 51 and the second conductive element 52 are arranged between the first insulating film 53 and the second insulating film 54. One end of the first conductive element 51 is welded to the circuit board 40, and the other end is connected to the first terminal 31 by reflow soldering. One end of the second conductive element 52 is welded to the circuit board 40, and the other end is connected to the second terminal 32 by reflow soldering.

[0098] The first conductive member 51 is a component for realizing electrical connection between the first terminal 31 and the circuit board 40. The shape of the first conductive member 51 can be arranged as required, as long as the first terminal 31 can be electrically connected to the circuit board 40. The second conductive member 52 is a component for realizing electrical connection between the second terminal 32 and the circuit board 40. The shape of the second conductive member 52 can be arranged as required, 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.

[0099] In the case where the electrical connector 50 is a flexible circuit board, the first conductive member 51 and the second conductive member 52 may be conductive tracks made on a metal foil. The first insulating film 53 and the second insulating film 54 are components that are coated on the periphery of the first conductive member 51 and the second conductive member 52, and the first insulating film 53 and the second insulating film 54 isolate the first conductive member 51 and the second conductive member 52 from the outside. The shapes of the first insulating film 53 and the second insulating film 54 may be various. The first insulating film 53 and the second insulating film 54 may be separately provided or integrally formed.

[0100] 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 .

[0101] Figure 8 for Figure 6 Enlarged view of part A in the middle.

[0102] Reference Figure 7 , Figure 6 and Figure 8In 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.

[0103] The first exposed area 511 is an area of ​​the first conductive member 51 that is not covered by the first insulating film 53 , and the second exposed area 521 is an area of ​​the second conductive member 52 that is not covered by the second insulating film 54 .

[0104] Specifically, refer to Fig. 9 , Fig. 9 for Figure 5 The schematic diagram of the structure of the circuit board 40 is shown in FIG. The circuit board 40 includes a first sampling wire harness 41 and a second sampling wire harness 42. The outer periphery of the first sampling wire harness 41 and the second sampling wire harness 42 can 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 position of the first sampling wire harness 41 corresponding to the first exposed area 511, and exposes the position of the second sampling wire harness 42 corresponding to the second exposed area 521. This facilitates the welding of the first exposed area 511 to the first sampling wire harness 41, and the welding of the second exposed area 521 to the second sampling wire harness 42.

[0105] That is, one end of the first conductive member 51 is welded to the first terminal 31 of the temperature sampling member 30, and the other end of the first conductive member 51 is welded to the first sampling harness 41 through the first exposed area 511, and the first conductive member 51 electrically connects the first terminal 31 to the first sampling harness 41. One end of the second conductive member 52 is welded to the second terminal 32 of the temperature sampling member 30, and the other end of the second conductive member 52 is welded to the second sampling harness 42 through the second exposed area 521, and the second conductive member 52 electrically connects the second terminal 32 to the second sampling harness 42.

[0106] 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 .

[0107] 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 .

[0108] Optionally, the first direction X is parallel to an arrangement direction of the plurality of battery cells 10 .

[0109] Reference Figure 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.

[0110] The first colloid has a sealing function, and the first colloid 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.

[0111] In this embodiment, the first weld mark 5111 and the second weld mark 5211 are coated with the first colloid, which can reduce the risk of liquid or foreign matter affecting the welding position and causing temperature sampling failure.

[0112] Reference Figure 4 , Figure 5 and Figure 6 In some embodiments, the battery 100 further includes a busbar 60 and a bracket 90 . The busbar 60 is used to realize the electrical connection of multiple battery cells 10 . The bracket 90 is an insulating member and is mounted on the busbar 60 . The temperature sampling member 30 is fixed to the bracket 90 .

[0113] The busbar 60 can be connected to the electrode terminals 12 of the battery cells 10, so as to realize the 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.

[0114] The bracket 90 is installed on the busbar 60 . The bracket 90 can be installed on the busbar 60 by means of clamping, riveting, etc.

[0115] 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.

[0116] The temperature sampling component 30 is fixed to the bracket 90 . The bracket 90 is a mounting base for the temperature sampling component 30 . The temperature sampling component 30 can be bonded to the bracket 90 .

[0117] In this embodiment, the temperature sampling component 30 is fixed to the bracket 90, and the bracket 90 is installed on the busbar 60, which is conducive to the busbar 60 fixing the bracket 90, thereby stabilizing the temperature of the temperature sampling component 30, reducing the risk of displacement of the temperature sampling component 30, and improving the sampling quality of the temperature sampling component 30.

[0118] 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 and high.

[0119] In some embodiments, reference Figure 5 and Figure 6 The bracket 90 is provided with a protrusion 64 on one side facing the busbar 60, and the busbar 60 is provided with a through hole 61 (such as Figure 3 ), the protrusion 64 is inserted into the through hole 61, so that the bracket 90 is installed on the busbar 60. Optionally, the bracket 90 is provided with two protrusions 64.

[0120] Reference Figure 5 and Figure 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 through the protrusion 92 .

[0121] The protrusion 92 is a component that separates the bracket 90 from the busbar 60. The structure of the protrusion 92 includes but is not limited to a protrusion, a protrusion, a protrusion or a combination thereof. One or more protrusions 92 may be provided. Figure 5 and Figure 6 In the figure, the convex part 92 is a convex strip, and two convex strips are provided, and the extending directions of the two convex strips are perpendicular to each other.

[0122] In this embodiment, the protrusion 92 can reduce the contact area between the bracket 90 and the busbar 60 , thereby reducing the influence of the temperature of the busbar 60 on the temperature sampling component 30 .

[0123] In some embodiments, the bracket 90 is injection molded on one end of the electrical connector 50 where the temperature sampling component 30 is disposed.

[0124] Optionally, the bracket 90 is an injection molded plate.

[0125] 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 .

[0126] In some embodiments, a groove 91 is formed on a side of the bracket 90 facing the collector 60 , and at least a portion of the temperature sampling element 30 is accommodated in the groove 91 .

[0127] The groove 91 may be configured in a rectangular, circular, elliptical, etc. Optionally, the groove 91 is a rectangular groove. In the case where the bracket 90 is provided with a plurality of convex portions 92 , the convex portions 92 may be arranged at intervals along the outer circumference of the groove 91 .

[0128] At least a portion of the temperature sampling member 30 is accommodated in the groove 91. On the one hand, the protrusion of the temperature sampling member 30 from the bracket 90 can be reduced, reducing the space occupied by the temperature sampling member 30 and the bracket 90 as a whole. On the other hand, the contact between the temperature sampling member 30 and the busbar 60 can be reduced, and the risk of the temperature of the busbar 60 affecting the temperature sampling member 30 and causing the collected temperature data of the battery cell 10 to be inaccurate can be reduced.

[0129] Fig.10 Schematic diagram of filling the groove 91 with the second colloid 93 according to some embodiments of the present application.

[0130] Reference Fig.10 In some embodiments, the battery 100 further includes a second colloid 93 , which fills the groove 91 and covers the temperature sampling member 30 .

[0131] The second colloid 93 is used to isolate the temperature sampling component 30 from the outside. The second colloid 93 covering the temperature sampling component 30 means that the temperature sampling component 30 is covered by the second colloid 93 and is not exposed. The second colloid 93 can just fill the groove 91, or only fill a part of the groove 91, as long as the temperature sampling component 30 is covered.

[0132] The material of the first colloid includes but is not limited to red glue, hot melt glue, sealant and the like.

[0133] 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 , resulting in failure of the temperature sampling component 30 in sampling the temperature of the battery cell 10 .

[0134] In some embodiments, the bracket 90 is disposed between the battery cell 10 and the busbar 60 .

[0135] The bracket 90 is disposed between the battery cell 10 and the busbar 60 . The busbar 60 can press the bracket 90 to alleviate the displacement of the bracket 90 , thereby reducing the risk of failure caused by displacement of the temperature sampling component 30 .

[0136] Reference Figure 3 In some embodiments, the battery 100 further includes a heat conductor 80 , which is disposed between the bracket 90 and the battery cell 10 .

[0137] The heat conducting member 80 is a component used to improve the heat transfer efficiency between the battery cell 10 and the temperature sampling member 30. The heat conducting member 80 is made of a heat conducting material. The material of the heat conducting member 80 includes but is not limited to heat conducting silica gel, heat conducting silicone grease, etc. The heat conducting silica gel and heat conducting silicone grease have insulating properties and can reduce the risk of short circuit of the battery 100.

[0138] In this embodiment, the heat conductor 80 transfers heat between the battery cell 10 and the temperature sampling component 30 . The heat conductor 80 has high thermal conductivity, which can improve the heat transfer efficiency between the battery cell 10 and the temperature sampling component 30 and improve the accuracy of the data collected by the temperature sampling component 30 .

[0139] Fig.11 FIG. 1 is an exploded schematic diagram of a battery 100 according to some other embodiments of the present application. Fig.11 In some embodiments, the battery 100 further includes an isolation plate 70, which is disposed between the busbar 60 and the battery cell 10, and is an insulating member. The bracket 90 is disposed between the isolation plate 70 and the busbar 60, and the heat conducting member 80 is disposed between the battery cell 10 and the isolation plate 70.

[0140] Optionally, the isolation plate 70 is a plastic plate.

[0141] An embodiment of the present application further provides an electric device, the electric device comprising the battery 100 provided in the embodiment of the first aspect, and the battery 100 is used to supply power to the electric device.

[0142] The embodiment of the present application also provides a battery 100, which includes 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. The temperature sampling component 30 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 welded to the electrical connector 50 respectively. The electrical connector 50 is a flexible circuit board. The flexible circuit board includes a first conductive component 51, a second conductive component 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, and the first conductive component 51 and the second conductive component 52 are arranged between the first insulating film 53 and the second insulating film 54. One end of the first conductive component 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 realize the electrical connection of multiple battery cells 10. The bracket 90 is an insulating member, and the bracket 90 is installed on the busbar 60. The bracket 90 is arranged between the battery cell 10 and the busbar 60, and the temperature sampling member 30 is fixed to the bracket 90. The bracket 90 is provided with a clamping protrusion 64, and the busbar 60 is provided with a through hole 61, and the clamping protrusion 64 is clamped into the through hole 61. A convex portion 92 is provided on the side of the bracket 90 facing the busbar 60, and the bracket 90 abuts against the busbar 60 through the convex portion 92. The bracket 90 is injection molded on the end of the electrical connector 50 where the temperature sampling member 30 is arranged. A groove 91 is formed on the side of the bracket 90 facing the busbar 60, and the temperature sampling member 30 is accommodated in the groove 91, and the second colloid 93 is filled in the groove 91 and covers the temperature sampling member 30. The heat conductive member 80 is arranged between the bracket 90 and the battery cell 10.

[0143] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0144] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: Battery cells; A temperature sampling component, used to collect the temperature of the battery cell; Circuit boards; Wherein, the battery further comprises an electrical connector, and the electrical connector is used to electrically connect the temperature sampling component and the circuit board, and the temperature sampling component is connected to the electrical connector by reflow soldering.

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

3. The battery according to claim 2, characterized in that 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 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, characterized in that 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, characterized in that: 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. The first weld mark and the second weld mark are both coated with a first colloid.

6. The battery according to any one of claims 1 to 4, characterized in that: The battery also includes: A busbar, used to realize electrical connection of a plurality of battery cells, A bracket, the bracket is an insulating member, and the bracket is installed on the busbar; Wherein, the temperature sampling component is fixed to the bracket.

7. The battery according to claim 6, characterized in that The bracket is riveted to the current collector.

8. The battery according to claim 6, characterized in that 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 claim 6, characterized in that The bracket is injection molded on one end of the electrical connector where the temperature sampling component is disposed.

10. The battery according to claim 6, characterized in that A groove is formed on one side of the bracket facing the confluence element, and at least a portion of the temperature sampling element is accommodated in the groove.

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

12. The battery according to claim 6, characterized in that The bracket is disposed between the battery cell and the busbar.

13. The battery according to claim 6, characterized in that The battery further includes a heat conductor, which is disposed between the bracket and the battery cell.

14. An electrical device, characterized in that: The invention comprises a battery as described in any one of claims 1 to 13, wherein the battery is used to supply power to the electrical device.

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