Wiring harness plate of battery, battery and electric device

Abstract

The invention discloses a wire harness plate of a battery, the battery and an electric device, which can reduce the risk of short circuit of the battery. The wire harness plate is used for being arranged on the side where electrode terminals of single batteries in the battery are located, at least one discharging mechanism is arranged on the wire harness plate, and under the condition that the battery is arranged on an electric device, the wire harness plate is located below the single batteries. And the discharge mechanism is used for discharging the electrolyte leaked from the battery monomers.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery wiring harness plate, a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The battery includes a plurality of battery cells, which are electrically connected to each other through a certain connection method. When electrolyte leakage occurs in the battery cells, short circuit and other risks may occur. Therefore, how to reduce the risk of battery short circuit has become an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a battery wiring harness board, a battery, and an electrical device, which can reduce the risk of battery short circuit.

[0005] In the first aspect, a wiring harness plate of a battery is also provided, wherein the wiring harness plate is used to be arranged on a side where the electrode terminals of the battery cells in the battery are located, and at least one discharge mechanism is arranged on the wiring harness plate; wherein, when the battery is arranged in an electrical device, the signal transmission component is located below the battery cells, and the discharge mechanism is used to discharge the electrolyte leaked from the battery cells.

[0006] In an embodiment of the present application, the signal transmission component of the battery includes a wiring harness board, on which a discharge mechanism is provided. The battery cells in the battery are inverted, and the discharge mechanism is provided on the wiring harness board. In this way, in the event of electrolyte leakage in the battery cells, the electrolyte can be discharged through the discharge mechanism, thereby reducing the risk of short circuit and thermal runaway between the battery cells caused by the accumulation of electrolyte on the wiring harness board.

[0007] In some possible implementations, the signal transmission component also includes a busbar component, which is used to connect the electrode terminals of the battery cells, and the busbar component is connected to the wiring harness board, and the discharge mechanism is arranged in an area on the wiring harness board close to the edge of the busbar component.

[0008] The discharge mechanism is arranged in the area of ​​the wiring harness plate located at the edge of the converging component, so that the discharge path of the electrolyte can be shortened and the electrolyte leaked from the electrode terminals of the battery cell can be discharged in time.

[0009] For example, along the arrangement direction of each row of battery cells in the battery, one busbar component is connected between the electrode terminals of every two adjacent battery cells, and the discharge mechanism is arranged on the wiring harness board in the area between the adjacent busbar components in the arrangement direction, thereby effectively utilizing the area on the wiring harness board between the two adjacent busbar components.

[0010] For another example, the discharge mechanism is disposed on the wiring harness plate in an area between two rows of busbars corresponding to two adjacent rows of battery cells in the battery, thereby effectively utilizing the area on the wiring harness plate between two adjacent rows of battery cells.

[0011] Since every two adjacent battery cells are connected by a busbar component, the busbar component covers the electrode terminals of the two battery cells and the edge of the busbar component corresponds to the shoulder of the battery cell, the electrolyte leaked from the electrode terminals of the battery cell can be discharged in time through the discharge mechanism.

[0012] In some possible implementations, the discharge mechanism is disposed on the wiring harness plate in a region close to at least one corner of the busbar component, which is beneficial to the discharge of the electrolyte.

[0013] In some possible implementations, the discharge mechanism includes a plurality of discharge holes, and the discharge mechanism is further used to prevent particles generated by welding from falling onto the surface of the battery cell during the welding process between the busbar component and the battery cell.

[0014] In this embodiment, the discharge mechanism is a leakage mesh structure, which includes multiple discharge holes, which can not only be used to discharge the electrolyte leaked from the battery cell, but also prevent the particles generated by the welding from falling to the surface of the battery cell during the welding process between the busbar component and the battery cell, so as to reduce the risk of short circuit between the battery cells.

[0015] In some possible implementations, the discharge mechanism includes an edge portion and a middle portion surrounded by the edge portion, the thickness of the middle portion is smaller than the thickness of the edge portion, and the discharge hole is located in the middle portion.

[0016] In this embodiment, the discharge mechanism includes an edge portion and a middle portion surrounded by the edge portion, and the thickness of the middle portion is smaller than the thickness of the edge portion. In this way, the discharge hole on the middle portion is conducive to the discharge of the electrolyte, and the edge portion can improve the overall strength of the discharge mechanism.

[0017] The size of the discharge hole needs to be smaller than or equal to the conventional size of particles generated by welding to effectively block the particles. For example, in some possible implementations, the size of the discharge hole is smaller than or equal to 1 mm.

[0018] In some possible implementations, the shape of the discharge hole is circular or square, and / or the shape of the edge portion is circular or square, thereby reducing the difficulty of process manufacturing.

[0019] In some possible implementations, the number of the discharge mechanisms is greater than or equal to the number of the battery cells. By setting the number of discharge mechanisms to be greater than or equal to the number of battery cells, each battery cell can correspond to one or more discharge mechanisms, thereby effectively protecting multiple battery cells in the battery and reducing the risk of electrolyte leakage in any battery cell.

[0020] In some possible implementations, a sampling harness is further disposed on the harness board, and the sampling harness and the discharge mechanism are disposed on the harness board to avoid each other, so as to avoid affecting the signal collection of the battery cell 120 .

[0021] In some possible implementations, the battery further includes a box, and the discharge mechanism is used to discharge the electrolyte leaked from the battery cells to the bottom wall of the box, thereby reducing the risk of short circuit and thermal runaway between battery cells caused by accumulation of electrolyte on the wiring harness plate.

[0022] In a second aspect, a battery is provided, comprising: a battery cell; and a wiring harness plate, which is arranged on a side where the electrode terminal of the battery cell is located, and at least one discharge mechanism is arranged on the wiring harness plate; wherein, when the battery is arranged in an electrical device, the wiring harness plate is located below the battery cell, and the discharge mechanism is used to discharge the electrolyte leaked from the battery cell.

[0023] In the embodiment of the present application, the battery includes a battery cell and a wiring harness board. The battery cell is inverted, and a discharge mechanism is provided on the wiring harness board. In this way, in the event of electrolyte leakage in the battery cell, the electrolyte can be discharged through the discharge mechanism, thereby reducing the risk of short circuit and thermal runaway between the battery cells caused by the accumulation of electrolyte on the wiring harness board.

[0024] In some possible implementations, the battery further includes a busbar component, which is used to connect electrode terminals of the battery cells, and the busbar component is connected to the wiring harness plate, and the discharge mechanism is disposed in a region of the wiring harness plate close to an edge of the busbar component.

[0025] The discharge mechanism is arranged in the area of ​​the wiring harness plate located at the edge of the converging component, so that the discharge path of the electrolyte can be shortened and the electrolyte leaked from the electrode terminals of the battery cell can be discharged in time.

[0026] For example, along the arrangement direction of each row of battery cells in the battery, one busbar component is connected between the electrode terminals of every two adjacent battery cells, and the discharge mechanism is arranged on the wiring harness board in the area between the adjacent busbar components in the arrangement direction, thereby effectively utilizing the area on the wiring harness board between the two adjacent busbar components.

[0027] For another example, the discharge mechanism is disposed on the wiring harness plate in an area between two rows of busbars corresponding to two adjacent rows of battery cells in the battery, thereby effectively utilizing the area on the wiring harness plate between two adjacent rows of battery cells.

[0028] Since every two adjacent battery cells are connected by a busbar component, the busbar component covers the electrode terminals of the two battery cells and the edge of the busbar component corresponds to the shoulder of the battery cell, the electrolyte leaked from the electrode terminals of the battery cell can be discharged in time through the discharge mechanism.

[0029] In some possible implementations, the discharge mechanism is disposed on the wiring harness plate in a region close to at least one corner of the busbar component, which is beneficial to the discharge of the electrolyte.

[0030] In some possible implementations, the discharge mechanism includes a plurality of discharge holes, and the discharge mechanism is also used to protect the surface of the battery cell during the production process of the battery.

[0031] In this embodiment, the discharge mechanism is a leakage mesh structure, which includes a plurality of discharge holes, which can not only be used to discharge the electrolyte leaked from the battery cell, but also can protect the surface of the battery cell during the production process of the battery, for example, in the process of welding the busbar component and the battery cell, it can prevent the particles generated by the welding from falling to the surface of the battery cell, so as to reduce the risk of short circuit between the battery cells.

[0032] In some possible implementations, the discharge mechanism includes an edge portion and a middle portion surrounded by the edge portion, the thickness of the middle portion is smaller than the thickness of the edge portion, and the discharge hole is located in the middle portion.

[0033] In this embodiment, the discharge mechanism includes an edge portion and a middle portion surrounded by the edge portion, and the thickness of the middle portion is smaller than the thickness of the edge portion. In this way, the discharge hole on the middle portion is conducive to the discharge of the electrolyte, and the edge portion can improve the overall strength of the discharge mechanism.

[0034] The size of the discharge hole needs to be smaller than or equal to the conventional size of particles generated by welding to effectively block the particles. For example, in some possible implementations, the size of the discharge hole is smaller than or equal to 1 mm.

[0035] In some possible implementations, the shape of the discharge hole is circular or square, and / or the shape of the edge portion is circular or square, thereby reducing the difficulty of process manufacturing.

[0036] In some possible implementations, the number of the discharge mechanisms is greater than or equal to the number of the battery cells. By setting the number of discharge mechanisms to be greater than or equal to the number of battery cells, each battery cell can correspond to one or more discharge mechanisms, thereby effectively protecting multiple battery cells in the battery and reducing the risk of electrolyte leakage in any battery cell.

[0037] In some possible implementations, a sampling harness is further disposed on the harness board, and the sampling harness and the discharge mechanism are disposed on the harness board to avoid each other, so as to avoid affecting the signal collection of the battery cell 120 .

[0038] In some possible implementations, the battery further includes a box, and the discharge mechanism is used to discharge the electrolyte leaked from the battery cells to the bottom wall of the box, thereby reducing the risk of short circuit and thermal runaway between battery cells caused by accumulation of electrolyte on the wiring harness plate.

[0039] In a third aspect, an electrical device is provided, comprising the battery described in the first aspect or any possible implementation of the first aspect, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 paying creative work.

[0041] Figure 1 It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application.

[0042] Figure 2 It is a schematic diagram of the structure of a battery according to an embodiment of the present application.

[0043] Figure 3 It is a schematic diagram of the partial structure of the battery of the embodiment of the present application.

[0044] Figure 4 It is a partial plan view of a battery according to an embodiment of the present application.

[0045] Figure 5 It is a partial cross-sectional view of a battery according to an embodiment of the present application.

[0046] Figure 6It is a schematic diagram of the structure of the discharge mechanism of an embodiment of the present application.

[0047] Figure 7 It is a thickness schematic diagram of the discharge mechanism of an embodiment of the present application.

[0048] Figure 8 It is a schematic diagram of the structure of the wiring harness board of an embodiment of the present application.

[0049] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0050] 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.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; 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" 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", "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.

[0052] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0054] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0055] The term "multiple" as used in the present application refers to two or more than two. Similarly, the term "multiple groups" refers to two or more than two groups, and the term "multiple sheets" refers to two or more than two sheets.

[0056] In the embodiments of the present application, the battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. The battery cell may be, for example, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0057] A battery cell usually includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions such as lithium ions are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0058] In some embodiments, the positive electrode may be a positive electrode sheet, which includes a positive electrode collector and a positive electrode active material disposed on at least one surface of the positive electrode collector.

[0059] The positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0060] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy on a polymer material substrate such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.

[0061] Among them, the positive electrode active material includes, for example, at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds. The present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries can also be used. These positive electrode active materials can be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, lithium iron phosphates such as LiFePO4 (also referred to as LFP), composite materials of lithium iron phosphate and carbon, lithium manganese phosphates such as LiMnPO4, composite materials of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and at least one of composite materials of lithium iron manganese phosphate and carbon.

[0062] In some embodiments, the negative electrode may be a negative electrode sheet, which includes a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0063] The negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0064] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy on a polymer material substrate such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.

[0065] The negative electrode active material includes, for example, at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, and the like.

[0066] In some embodiments, the negative electrode may also be a foamed metal. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. It should be noted that when the foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not be provided with a negative electrode active material.

[0067] As an example, the negative electrode current collector may be filled with or / and deposited with a lithium source material, potassium metal or sodium metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0068] The material of the positive electrode current collector may be, for example, aluminum, and the material of the negative electrode current collector may be, for example, copper.

[0069] The separator in the electrode assembly is disposed between the positive electrode and the negative electrode. In some embodiments, the separator is a separator. The present application does not limit the type of separator, and any porous structure separator with good chemical stability and mechanical stability can be selected. For example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.

[0070] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0071] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application does not limit the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0072] In the embodiment of the present application, the electrode assembly may be a winding structure, wherein the positive electrode sheet and the negative electrode sheet are wound to form a winding structure. The electrode assembly may also be a laminated structure, for example, the positive electrode sheet and the negative electrode sheet may be provided in a plurality, and the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately stacked. Alternatively, the positive electrode sheet may be provided in a plurality, and the negative electrode sheet may be folded to form a plurality of stacked folded sections, with a positive electrode sheet sandwiched between adjacent folded sections; or, both the positive electrode sheet and the negative electrode sheet may be folded to form a plurality of stacked folded sections.

[0073] There may be a plurality of separators, each of which is disposed between any adjacent positive electrode sheets and negative electrode sheets.

[0074] In some embodiments, the separator may be disposed continuously and disposed between any adjacent positive electrode sheets and negative electrode sheets by folding or winding.

[0075] The shape of the electrode assembly can be, for example, cylindrical, flat, or polygonal. The electrode assembly can be provided with a tab, which is used to conduct current from the electrode assembly. The tab includes a positive tab and a negative tab.

[0076] In some embodiments, the battery cell includes a shell. The shell is used to encapsulate components such as electrode assemblies and electrolytes. The shell can be a steel shell, an aluminum shell, a plastic shell such as polypropylene, a composite metal shell such as a copper-aluminum composite shell, or an aluminum-plastic film. The shell includes a box body and a cover plate.

[0077] The battery cells may be, for example, cylindrical battery cells, prismatic battery cells, soft-pack battery cells or battery cells of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells or polygonal prismatic batteries, among which the polygonal prismatic batteries may be hexagonal prismatic batteries, etc. This application does not impose any restrictions on this.

[0078] The battery described in the embodiments of the present application may be a single physical module including one or more battery cells to provide higher voltage and capacity. In the case of multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0079] 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.

[0080] 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.

[0081] 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 vehicle floor, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0082] Since multiple battery cells in a battery are electrically connected through a certain connection method, when electrolyte leakage occurs in a battery cell, it may cause risks such as short circuit. In view of this, the present application provides a battery and a signal transmission component thereof, which can be applied to a battery with inverted battery cells to reduce the risk of short circuit between battery cells.

[0083] The technical solutions described in the embodiments of the present application are applicable to various devices that use batteries, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0084] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0085] For example, Figure 1As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 30, a controller 20 and a battery 10 can be arranged inside the vehicle 1. The controller 20 is used to control the battery 10 to power the motor 30. For example, a battery 10 can be arranged at the bottom, front or rear of the vehicle 1. The battery 10 can be used to power the vehicle 1. For example, the battery 10 can be used as an operating power supply for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power demand during the start, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 can not only be used as an operating power supply for the vehicle 1, but also as a driving power supply for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1. In addition, a battery for low-voltage power supply, such as a 12V or 48V battery, may also be arranged inside the vehicle 1.

[0086] In order to meet different power usage requirements, the battery may include multiple different types of battery cells. Multiple battery cells can be connected in series, in parallel or in a mixed manner according to the type of battery cells to form multiple battery cell groups, and the multiple battery cell groups are then connected in series to form a battery, wherein the mixed connection is a mixture of series and parallel connections. Multiple different battery cells can also be directly connected in series, in parallel or in a mixed manner to form a battery. In other words, multiple battery cells can directly form a battery, or they can first form a battery cell group according to the type of battery cells, and then form a battery from the battery cell group.

[0087] Figure 2 A schematic diagram of the structure of a battery 10 according to an embodiment of the present application is shown, and the battery 10 may include a plurality of battery cells (not shown in the figure). The battery 10 may also include a housing (or cover) 110, the interior of the housing 110 is a hollow structure, and a plurality of battery cells are accommodated in the housing 110. The housing 110 may include two parts, which are respectively referred to as a first housing portion 111 and a second housing portion 112, and the first housing portion 111 and the second housing portion 112 are buckled together. The shapes of the first housing portion 111 and the second housing portion 112 may be determined according to the shapes of the combination of the plurality of battery cells, and at least one of the first housing portion 111 and the second housing portion 112 has an opening.

[0088] For example, Figure 2As shown, only one of the first box body 111 and the second box body 112 is a hollow cuboid with an opening, while the other is in the shape of a plate to cover the opening. Here, taking the second box body 112 as a hollow structure with only one face as an opening face, and the first box body 111 as a plate as an example, the first box body 111 covers the opening of the second box body 112 to form a box body 110 with a closed chamber, which can be used to accommodate multiple battery cells. After multiple battery cells are connected in parallel, in series, or in a mixed combination, they are placed in the box body 110 formed by buckling the first box body 111 and the second box body 112.

[0089] For example, unlike Figure 2 As shown, the first box body 111 and the second box body 112 can both be hollow structures and each have only one open surface, the openings of the first box body 111 and the second box body 112 are arranged opposite to each other, and the first box body 111 and the second box body 112 are buckled together to form a box body 110 with a closed chamber. After multiple battery cells are connected in parallel, in series or in mixed series, they are placed in the box body 110 formed by the buckling of the first box body 111 and the second box body 112.

[0090] In addition, the battery 10 may also include other structures, for example, the battery may also include a signal transmission component. The signal transmission component may be used to transmit signals such as the voltage and / or temperature of the battery cell. The signal transmission component may include a wiring harness board, which may include, for example, a temperature sensor and a voltage sampling line, etc., for measuring and transmitting information such as the voltage, current and temperature of the battery, and realizing safe management of the battery by communicating with the BMS.

[0091] In some embodiments, the signal transmission component may also include a busbar component, which is used to realize electrical connection between multiple battery cells, such as parallel, series or mixed connection. The busbar component can realize electrical connection between battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the busbar component can be fixed to the electrode terminals of the battery cells by welding. The busbar component transmits the voltage of the battery cell. After multiple battery cells are connected in series, a higher voltage will be obtained. Accordingly, the electrical connection formed by the busbar component can also be called a "high voltage connection".

[0092] In some embodiments, the busbar and the wiring harness plate are encapsulated in an insulating layer to form a signal transmission assembly, also known as a CCS assembly, wherein the signal transmission assembly has no insulating layer at the connection with the electrode terminal of the battery cell, that is, the insulating layer has an opening at this location so as to connect with the electrode terminal of the battery cell.

[0093] As an example, Figure 2The schematic diagram of the structure of a battery of an embodiment of the present application is shown, the battery 10 includes a battery cell 120 and a wiring harness plate 130. The wiring harness plate 130 is used to be arranged on a side of the battery cell 120 close to the electrode terminal. In the case where the battery 10 is arranged in an electric device, the wiring harness plate 130 is located below the battery cell 120.

[0094] like Figure 3 In the partial structural diagram of the battery 10 shown in FIG. 1 , at least one discharge mechanism 150 is disposed on the harness plate 130 . The discharge mechanism 150 is used to discharge the electrolyte leaked from the battery cell 120 .

[0095] In the embodiment of the present application, the battery cell 120 is inverted, that is, when the battery 10 is set in an electrical device, the electrode terminals of the battery cell 120 are facing away from the passenger. At this time, the wiring harness plate 130 is located below the battery cell 120. Since the wiring harness plate 130 is provided with a discharge mechanism 150, in the event that the electrolyte leaks from the electrode terminals of the battery cell 120, it can be discharged through the discharge mechanism 150, thereby reducing the risk of short circuit and thermal runaway between the battery cells 120 caused by the accumulation of electrolyte on the wiring harness plate 130.

[0096] The battery 10 may include at least one row of battery cells 120. The battery cells 120 in each row of battery cells 120 are arranged along the arrangement direction X. The electrode terminals of the battery cells 120 are connected by a busbar 140. For example, the electrode terminals of two adjacent battery cells 120 in each row of battery cells 120 are connected by a busbar 140; or, the electrode terminals of the battery cells 120 in each row are connected by a busbar 140. The busbar 140 and the electrode terminals of the battery cells 120 may be connected, for example, by welding or the like.

[0097] The busbar 140 is also connected to the harness board 130, so that the harness board 130 can collect the voltage signal of the battery cell 120 through the busbar 140. The busbar 140 may also be called a busbar.

[0098] In the embodiment of the present application, the harness plate 130 and the confluence component 140 may be collectively referred to as a signal transmission component, for example, the confluence component 140 may be integrated with the harness plate 130. In some embodiments, a sampling harness is also provided on the harness plate 130 for collecting and transmitting signals such as voltage and temperature of the battery cell 120, wherein the discharge mechanism 150 and the sampling harness are arranged to avoid each other on the harness plate 130 to avoid affecting the signal collection of the battery cell 120.

[0099] In some embodiments, the discharge mechanism 150 is located in a region of the wiring harness plate 130 near the edge of the busbar 140. Since the busbar 140 is connected to the electrode terminals of the battery cells 120, the discharge mechanism 150 is arranged in a region of the wiring harness plate 130 near the edge of the busbar 140, so that the discharge path of the electrolyte can be shortened, and the electrolyte leaked from the electrode terminals of the battery cells 120 can be discharged in time.

[0100] For example, along the arrangement direction X of each row of battery cells 120 in the battery 10, a busbar component 140 is connected between the electrode terminals of each adjacent two battery cells 120, and the discharge mechanism 150 can be arranged in the area between the adjacent busbar components 140 on the wiring harness plate 130 located in the arrangement direction X, thereby effectively utilizing the area between the adjacent busbar components 140 on the wiring harness plate 130.

[0101] For another example, the discharge mechanism 150 may be disposed on the wiring harness plate 130 between two rows of busbars 140 corresponding to two adjacent rows of battery cells 120 in the battery 10 , thereby effectively utilizing the area on the wiring harness plate 130 between two adjacent rows of battery cells 120 .

[0102] Since every two adjacent battery cells 120 are connected by the busbar 140, the busbar 140 covers the electrode terminals of the two battery cells 120 and the edge of the busbar 140 corresponds to the shoulder of the battery cell 120. The shoulder, for example, includes the area on the surface where the electrode terminals of the battery 10 are located except the electrode terminals, so the electrolyte leaked from the electrode terminals of the battery cell 120 can be discharged in time through the discharge mechanism 150.

[0103] As an example, Figure 4 The partial plan view of the battery 10 shown in the figure comprises two rows of battery cells 120, and the areas on the wiring harness plate 130 which are located at the edges of the two rows of busbars 140 corresponding to the two rows of battery cells 120 are provided with discharge mechanisms 150, and the discharge mechanisms 150 arranged on the edges of each row of busbars 140 are located in an area on the wiring harness plate 130 which is close to the inner edge of the busbars 140, and the inner edge is parallel to the arrangement direction of each row of battery cells 120 and close to another adjacent row of battery cells 120.

[0104] In some embodiments, the drain mechanism 150 may be disposed on the harness plate 130 in an area close to at least one corner of the busbar component 140 to facilitate the draining of the electrolyte.

[0105] For example, a busbar member may be provided on the harness plate 130 at an area close to two corners of each busbar member 140. At this time, each battery cell 120 corresponds to a discharge mechanism 150 for discharging electrolyte leaked from the corresponding battery cell 120.

[0106] Of course, corresponding discharge mechanisms 150 may also be provided on the wiring harness plate 130 at areas close to the four corners of each of the converging components 140 .

[0107] Figure 4 In the example, the discharge mechanism 150 is arranged along the arrangement direction X of each row of battery cells 120, and a pair of discharge mechanisms are arranged in the area near the edge of each busbar component 140 on the wiring harness plate 130, and each discharge mechanism is used to discharge the electrolyte leaked from its corresponding battery cell 120.

[0108] Figure 5 yes Figure 4 A cross-sectional view of the battery 10 along the AA' direction is shown in FIG. Figure 5 As shown, a discharge mechanism 150 is provided in an area adjacent to the busbar 140 on the harness plate 130. The electrolyte leaked from the electrode terminal of the battery 10 can flow out to the surface of the busbar 140 connected thereto, and then reach the discharge mechanism 150 provided on the edge of the harness plate 130 close to the busbar 140, and then be discharged by the discharge mechanism 150 to the space on the side of the harness plate 130 away from the battery cell 120. For example, the discharge mechanism 150 is used to discharge the electrolyte leaked from the battery cell 120 to the bottom wall of the box body 110.

[0109] The embodiment of the present application does not limit the number of the discharge mechanisms 150. In some embodiments, the number of the discharge mechanisms 150 can be set to be greater than or equal to the number of the battery cells 120. By setting the number of the discharge mechanisms 150 to be greater than or equal to the number of the battery cells 120, each battery cell 120 can correspond to one or more discharge mechanisms 150, and multiple battery cells 120 in the battery cell 120 can be effectively protected, reducing the risk of electrolyte leakage in any battery cell 120.

[0110] It can be understood that in order to better discharge the electrolyte leaked from the electrode terminals of the battery cells 120, it is necessary to set the discharge mechanism 150 on the wiring harness plate near the electrode terminals of each battery cell 120. However, since the electrode terminals of the battery cells 120 are connected to the busbar 140, the discharge mechanism 150 should not be set on the busbar 140 as much as possible, otherwise it will affect the current capacity of the busbar 140. Therefore, it is necessary to set the discharge mechanism on the wiring harness plate 130 at a position away from the busbar 140. In order to shorten the discharge path as much as possible, the discharge mechanism 150 is set on the wiring harness plate 130 near the edge of the busbar 140, so that the discharge mechanism is more likely to be close to the electrode terminals.

[0111] In some embodiments, the discharge mechanism 150 includes a plurality of discharge holes 1511, and the discharge mechanism 150 is also used to protect the surface of the battery cell 120 during the production process of the battery 10. For example, it is used to prevent particles generated by welding from falling onto the surface of the battery cell 120 during the welding process between the busbar component 140 and the battery cell 120, thereby damaging the blue film of the battery cell 120.

[0112] That is to say, the discharge mechanism 150 can be a leakage net structure, which includes a plurality of discharge holes 1511, which can not only be used to discharge the electrolyte leaked from the battery cell 120, but also can protect the surface of the battery cell 120 during the production process of the battery 10. For example, during the welding process of the busbar component 140 and the battery cell 120, it can prevent the particles generated by the welding from falling to the surface of the battery cell 120, so as to reduce the risk of short circuit between the battery cells 120.

[0113] In order to intercept the splash of particles generated during welding, the material of the discharge mechanism can be, for example, flame-retardant and high-temperature resistant materials, which can withstand the highest temperature of metal particles generated by welding without damaging the discharge mechanism 150. At the same time, the discharge mechanism 150 can also be made of materials with characteristics such as non-stickiness, sliding, moisture resistance, wear resistance and corrosion resistance, so as to reduce the probability of blockage of the discharge hole 1511 caused by adhesion of metal particles generated by welding, thereby improving the discharge efficiency of the electrolyte.

[0114] In some embodiments, Figure 6 The structure of the discharge mechanism 150 shown in FIG. 1 includes an edge portion 152 and a middle portion 151 surrounded by the edge portion 152 , and the discharge hole 1511 is located in the middle portion 151 .

[0115] The present application does not limit the shape of the discharge hole, for example, the shape of the discharge hole 1511 can be circular or square, etc., so as to reduce the difficulty of process manufacturing. Similarly, the present application does not limit the shape of the edge portion 152, for example, the shape of the edge portion 152 can be circular or square, etc.

[0116] Alternatively, if Figure 7 As shown in the structural diagram of the discharge mechanism 150, the thickness of the middle portion 151 of the discharge mechanism 150 can be less than the thickness of the edge portion 152. In this way, the discharge hole 1511 on the middle portion 151 is conducive to manufacturing and the discharge of the electrolyte, and the edge portion 152 can improve the overall strength of the discharge mechanism 150.

[0117] The size of the discharge hole 1511 needs to be smaller than or equal to the usual size of particles or impurities generated during the production process of the battery 10, such as the usual size of particles or impurities generated during the welding process of the confluence component 140 and the battery cell 120, so as to effectively block these particles and impurities. If the size of the discharge hole 1511 is too large, the surface of the battery cell 120 cannot be effectively protected during the production process of the battery 10; if the size of the discharge hole 1511 is too small, the discharge efficiency of the electrolyte will be affected. Therefore, in some embodiments, such as Figure 7 As shown, the size D of the discharge hole 1511 is less than or equal to 1 mm, or the mesh size of the discharge hole 1511 is less than or equal to 1 mm. In the embodiment of the present application, for example, 1 mm sized particles or impurities can be used to test the discharge hole 1511 to determine whether the size D of the discharge hole 1511 meets the requirements.

[0118] The present application also provides a battery wiring harness plate 130, such as Figure 8 The structure of the wiring harness plate 130 shown in the figure is used to be arranged on a side of the battery cell 120 in the battery 10 close to the electrode terminal, and at least one discharge mechanism 150 is arranged on the wiring harness plate 130. In the case where the battery is arranged in an electric device, the wiring harness plate 130 is located below the battery cell 120, and the discharge mechanism 150 is used to discharge the electrolyte leaked from the battery cell 120.

[0119] Since the discharge mechanism 150 is provided on the wiring harness plate 130, the battery cells 120 in the battery 10 are inverted, and the discharge mechanism 150 is provided on the wiring harness plate 130, in the event of electrolyte leakage in the battery cells 120, the electrolyte can be discharged through the discharge mechanism 150, thereby reducing the risk of short circuit and thermal runaway between the battery cells 120 caused by the accumulation of electrolyte on the wiring harness plate 130.

[0120] In some embodiments, the battery 10 further includes a busbar 140 for connecting electrode terminals of the battery cells 120 , and the busbar 140 is connected to the harness plate 130 , and the discharge mechanism 150 is disposed on the harness plate 130 near the edge of the busbar 140 .

[0121] By disposing the discharge mechanism 150 at the edge of the converging component 140 on the harness plate 130 , the discharge path of the electrolyte can be shortened, and the electrolyte leaked from the electrode terminals of the battery cells 120 can be discharged in time.

[0122] For example, along the arrangement direction X of each row of battery cells 120 in the battery 10, a busbar component 140 is connected between the electrode terminals of each adjacent two battery cells 120, and the discharge mechanism 150 can be arranged in the area between the adjacent busbar components 140 on the wiring harness plate 130 located in the arrangement direction X, thereby effectively utilizing the area between the adjacent busbar components 140 on the wiring harness plate 130.

[0123] For another example, the discharge mechanism 150 may be disposed on the harness plate 130 between the respective corresponding busbars 140 of two adjacent rows of battery cells 120 in the battery 10 , thereby effectively utilizing the area on the harness plate 130 between the two adjacent rows of battery cells 120 .

[0124] Since every two adjacent battery cells 120 are connected by the busbar 140, the busbar 140 covers the electrode terminals of the two battery cells 120 and the edge of the busbar 140 corresponds to the shoulder of the battery cell 120. The shoulder, for example, includes the area on the surface where the electrode terminals of the battery 10 are located except the electrode terminals, so the electrolyte leaked from the electrode terminals of the battery cell 120 can be discharged in time through the discharge mechanism 150.

[0125] In some embodiments, the drain mechanism 150 is disposed on the harness plate 130 in an area close to at least one corner of the busbar component 140 to facilitate the draining of the electrolyte.

[0126] In some embodiments, the discharge mechanism 150 includes a plurality of discharge holes 1511 , and the discharge mechanism 150 is also used to protect the surface of the battery cell 120 during the production process of the battery 10 .

[0127] In this embodiment, the discharge mechanism 150 is a leakage mesh structure, which includes a plurality of discharge holes 1511, which can not only be used to discharge the electrolyte leaked from the battery cell 120, but also prevent the particles generated by the welding from falling to the surface of the battery cell 120 during the welding process between the busbar component 140 and the battery cell 120, so as to reduce the risk of short circuit between the battery cells 120.

[0128] In some embodiments, the discharge mechanism 150 includes an edge portion 152 and a middle portion 151 surrounded by the edge portion 152 , the thickness of the middle portion 151 is smaller than the thickness of the edge portion 152 , and the discharge hole 1511 is located in the middle portion 151 .

[0129] In this embodiment, the discharge mechanism 150 includes an edge portion 152 and a middle portion 151 surrounded by the edge portion 152, and the thickness of the middle portion 151 is smaller than the thickness of the edge portion 152. In this way, the discharge hole 1511 on the middle portion 151 is conducive to manufacturing and the discharge of electrolyte, and the edge portion 152 can improve the overall strength of the discharge mechanism 150.

[0130] The size of the discharge hole 1511 needs to be smaller than or equal to the conventional size of particles generated by welding to effectively block the particles. For example, in some embodiments, the size of the discharge hole 1511 is smaller than or equal to 1 mm.

[0131] In some embodiments, the shape of the discharge hole 1511 is circular or square, and / or the shape of the edge portion 152 is circular or square, thereby reducing the difficulty of manufacturing process.

[0132] In some embodiments, the number of the discharge mechanisms 150 is greater than or equal to the number of the battery cells 120. By setting the number of the discharge mechanisms 150 to be greater than or equal to the number of the battery cells 120, each battery cell 120 can correspond to one or more discharge mechanisms 150, thereby effectively protecting multiple battery cells 120 in the battery cells 120 and reducing the risk of electrolyte leakage in any battery cell 120.

[0133] In some embodiments, a sampling harness is further disposed on the harness plate 130 , and the sampling harness and the discharge mechanism 150 are disposed on the harness plate 130 to avoid each other.

[0134] In some embodiments, the battery 10 further includes a housing 110 , and the discharge mechanism 150 is used to discharge electrolyte leaked from the battery cells 120 to the bottom wall of the housing 110 .

[0135] It is understood that the specific details of the wiring harness plate 130 can refer to the aforementioned Figures 3 to 7 For the sake of brevity, the description of battery 10 is not repeated here.

[0136] The present application also provides an electrical device, including the battery 10 described in any of the above embodiments, and the battery 10 is used to provide electrical energy to the electrical device. The electrical device may be, for example, Figure 1 Vehicle shown.

[0137] It can be seen that the battery cell 120 in the battery 10 of the embodiment of the present application is inverted, and a plurality of leakage net structures are provided in the area of ​​the wiring harness plate 130 that avoids the sampling harness and the flow-collecting component 140 and is close to the electrode terminal of the battery cell 120. In this way, in the event of electrolyte leakage in the battery cell 120, the electrolyte can be discharged through the leakage net structure, thereby reducing the risk of short circuit and thermal runaway between the battery cells 120 caused by the accumulation of electrolyte on the wiring harness plate 130. At the same time, the leakage net structure can prevent the particles generated by impedance welding from falling to the surface of the battery cell 120 during the welding process between the flow-collecting component 140 and the electrode terminal of the battery cell 120, thereby protecting the battery cell 120.

[0138] It should be noted that, under the premise of no conflict, the various embodiments described in this application and / or the technical features in each embodiment can be arbitrarily combined with each other, and the technical solution obtained after the combination should also fall within the protection scope of this application.

[0139] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A wiring harness plate for a battery, characterized in that: The wiring harness plate is used to be arranged on a side where the electrode terminals of the battery cells in the battery are located, and at least one discharge mechanism is arranged on the wiring harness plate; Wherein, when the battery is arranged in an electric device, the wiring harness plate is located below the battery cell, and the discharge mechanism is used to discharge the electrolyte leaked from the battery cell.

2. The wiring harness plate according to claim 1, characterized in that: The battery further includes a busbar component, which is used to connect electrode terminals of the battery cells and is connected to the harness plate. The discharge mechanism is disposed in a region of the harness plate close to an edge of the busbar component.

3. The wiring harness plate according to claim 2, characterized in that: Along the arrangement direction of each row of battery cells in the battery, one busbar is connected between the electrode terminals of every two adjacent battery cells, and the discharge mechanism is arranged in the area between the adjacent busbars on the wiring harness plate in the arrangement direction.

4. The wiring harness plate according to claim 2 or 3, characterized in that: The discharge mechanism is arranged on the wiring harness plate in a region between two rows of current collecting components corresponding to two adjacent rows of battery cells in the battery.

5. The wiring harness plate according to any one of claims 2 to 4, characterized in that: The drain mechanism is provided on the harness plate in a region close to at least one corner of the busbar component.

6. The wiring harness plate according to any one of claims 1 to 5, characterized in that: The discharge mechanism includes a plurality of discharge holes, and the discharge mechanism is also used to protect the surface of the battery cell during the production process of the battery.

7. The wiring harness plate according to claim 6, characterized in that: The discharge mechanism includes an edge portion and a middle portion surrounded by the edge portion, the thickness of the middle portion is smaller than the thickness of the edge portion, and the discharge hole is located in the middle portion.

8. The wiring harness plate according to claim 7, characterized in that: The discharge hole is in a circular or square shape; and / or the edge portion is in a circular or square shape.

9. The wiring harness plate according to any one of claims 6 to 8, characterized in that: The size of the discharge hole is less than or equal to 1 mm.

10. The wiring harness plate according to any one of claims 1 to 9, characterized in that: The number of the discharge mechanisms is greater than or equal to the number of the battery cells.

11. The wiring harness plate according to any one of claims 1 to 10, characterized in that: A sampling harness is also provided on the harness plate, and the sampling harness and the discharge mechanism are arranged on the harness plate to avoid each other.

12. The wiring harness plate according to any one of claims 1 to 11, characterized in that: The battery further comprises a box body, and the discharge mechanism is used for discharging electrolyte leaked from the battery cells to the bottom wall of the box body.

13. A battery, characterized in that: include: Battery cells; as well as, A wiring harness plate, arranged on a side where the electrode terminals of the battery cell are located, and at least one discharge mechanism is arranged on the wiring harness plate; Wherein, when the battery is arranged in an electric device, the wiring harness plate is located below the battery cell, and the discharge mechanism is used to discharge the electrolyte leaked from the battery cell.

14. The battery according to claim 13, characterized in that The battery further includes a busbar component, which is used to connect electrode terminals of the battery cells and is connected to the harness plate. The discharge mechanism is disposed in a region of the harness plate close to an edge of the busbar component.

15. The battery according to claim 14, characterized in that Along the arrangement direction of each row of battery cells in the battery, one busbar is connected between the electrode terminals of every two adjacent battery cells, and the discharge mechanism is arranged in the area between the adjacent busbars on the wiring harness plate in the arrangement direction.

16. The battery according to claim 14 or 15, characterized in that: The discharge mechanism is arranged on the wiring harness plate in a region between two rows of current collecting components corresponding to two adjacent rows of battery cells in the battery.

17. The battery according to any one of claims 14 to 16, characterized in that The drain mechanism is provided on the harness plate in a region close to at least one corner of the busbar component.

18. The battery according to any one of claims 13 to 17, characterized in that The discharge mechanism includes a plurality of discharge holes, and the discharge mechanism is also used to protect the surface of the battery cell during the production process of the battery.

19. The battery according to claim 18, characterized in that The discharge mechanism includes an edge portion and a middle portion surrounded by the edge portion, the thickness of the middle portion is smaller than the thickness of the edge portion, and the discharge hole is located in the middle portion.

20. The battery according to claim 19, characterized in that The discharge hole is in a circular or square shape; and / or the edge portion is in a circular or square shape.

21. The battery according to any one of claims 18 to 20, characterized in that The size of the discharge hole is less than or equal to 1 mm.

22. The battery according to any one of claims 13 to 21, characterized in that The number of the discharge mechanisms is greater than or equal to the number of the battery cells.

23. The battery according to any one of claims 13 to 22, characterized in that A sampling harness is also provided on the harness plate, and the sampling harness and the discharge mechanism are arranged on the harness plate to avoid each other.

24. The battery according to any one of claims 13 to 23, characterized in that The battery further comprises a box body, and the discharge mechanism is used for discharging electrolyte leaked from the battery cells to the bottom wall of the box body.

25. An electrical device, characterized in that: The invention comprises a battery according to any one of claims 13 to 24, wherein the battery is used to provide electrical energy to the electrical device.

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