WO2023207619A1

WO2023207619A1 - Battery, electric device, and secondary utilization method for wire harness of battery

Info

Publication number: WO2023207619A1
Application number: PCT/CN2023/088165
Authority: WO
Inventors: 王冲; 郑陈铃; 陈智明; 谌启财; 刘少钟; 甘卫锋; 何佳
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-04-29
Filing date: 2023-04-13
Publication date: 2023-11-02
Also published as: CN117013213A

Abstract

The present application relates to a battery, an electric device, and a secondary utilization method for a wire harness of a battery, which belong to the technical field of battery manufacturing. Provided in the present application is a battery, comprising a battery cell; a collection terminal, which is used for collecting information of the battery cell; a wire harness, wherein one end of the wire harness is connected to the collection terminal, and the wire harness is configured to be fused to form a first section and a second section when a current reaches a first preset value; and a fusing assembly, which is used for connecting the first section and the second section, wherein the fusing assembly is configured to be fused when the current reaches a second preset value. The wire harness of the battery can be repaired for secondary utilization after being fused, thereby reducing the battery recycling cost. Further provided in the present application is a battery device, comprising the battery. Further provided in the present application is a secondary utilization method for a wire harness of a battery.

Description

Secondary utilization methods of batteries, electrical equipment and battery wiring harnesses

Cross-references to related applications

This application claims priority to the Chinese patent application (202210466603.5) titled "Secondary Utilization Method of Batteries, Electrical Equipment and Battery Wiring Harnesses" submitted on April 29, 2022. The entire content of this application is incorporated by reference. in this article.

Technical field

The present application relates to the technical field of battery manufacturing, and specifically, to a method of secondary utilization of batteries, electrical equipment, and battery wiring harnesses.

Background technique

With the continued prosperity of the new energy vehicle market, a large number of new energy vehicles have been put into the market. New energy vehicles use power batteries to provide energy. The batteries may be damaged after long-term use. New batteries need to be replaced for new energy vehicles to support the cruising range of new energy vehicles. Due to factors such as the rising cost of raw materials and the large number of used batteries, recycling old batteries, repairing damaged parts and putting them back into use can not only reduce the replacement cost of batteries for new energy vehicles, but also reduce the consumption of raw materials.

At present, most components of the battery are not considered for secondary use when they are first assembled. These components cannot be reused after damage, resulting in high recycling costs for the battery.

Contents of the invention

To this end, this application proposes a method for secondary utilization of batteries, electrical equipment and battery wiring harnesses. The battery wiring harness can be repaired for secondary use after fusing, which reduces the recycling cost of the battery.

The first embodiment of the present application proposes a battery, including: a battery cell; a collection terminal for collecting information about the battery cell; and a wire harness, one end of the wire harness is connected to the collection terminal, and the wire harness is configured to fuse to form a first segment and a second segment when the current reaches a first preset value; a fuse component configured to connect the first segment and the second segment, and the fuse component is configured to fuse to form a first segment and a second segment when the current reaches a first preset value; The fuse is blown at the second preset value.

In the battery of the embodiment of the present application, the wire harness is fused when the current reaches the first preset value to form a first section and a second section. After the battery is recycled, the first section and the second section are connected by using a fuse assembly to repair the wire harness and The wiring harness has a fuse protection function to realize low-cost secondary use of the battery.

According to some embodiments of the present application, the first preset value and the second preset value are the same.

In the above solution, after using a fuse component to connect the first and second sections, the fuse current threshold of the wire harness is the same, allowing the reused battery to maintain its original performance of reducing accident risks.

According to some embodiments of the present application, the wire harness includes a fuse part, and the flow area of the fuse part is smaller than the flow area of other parts of the wire harness.

In the above solution, the overflow area of the fuse part is smaller than the overcurrent area of other parts of the wire harness. When the current through the wire harness reaches the first preset value, the temperature of the fuse part is higher than the temperature of other parts of the wire harness, and can be earlier than the temperature of other parts of the wire harness. Other parts of the wire harness are fused, cutting off the current path and reducing the possibility of accidents caused by excessive current in the wire harness, thereby enabling the battery to have better performance in reducing the risk of accidents.

According to some embodiments of the present application, the fuse assembly includes: a fuse configured to fuse when the current reaches the second preset value; a first connecting piece and a second connecting piece respectively connected to the fuse. At both ends, the first connecting piece is used to connect to the first section, and the second connecting piece is used to connect to the second section.

In the above solution, after using the fuse assembly to connect the first section and the second section, the fuse assembly connects the first section and the second section through the first connecting piece and the second connecting piece. When the current reaches the second preset value, the fuse assembly Fusing cuts off the current path and reduces the possibility of accidents caused by excessive wiring harness current, thereby enabling the reused battery to have better performance in reducing the risk of accidents.

According to some embodiments of the present application, the flow area of the fuse member is smaller than the flow area of the first connecting member and the second connecting member.

In the above solution, the flow area of the fuse is smaller than the flow area of the first connector and the second connector. When the current through the wire harness reaches the second preset value, the temperature of the fuse is higher than that of the first connector and the second connector. The temperature of the second connecting piece can fuse before the first connecting piece and the second connecting piece, cutting off the current path and reducing the possibility of accidents caused by excessive wire harness current.

According to some embodiments of the present application, the battery further includes: a first insulating member for insulating and covering the connection between the first connecting member and the first section; a second insulating member for insulating and covering The connection between the second connecting piece and the second section; a third insulating piece, used to insulate and cover the fuse piece.

In the above solution, the first insulating member, the second insulating member and the third insulating member can insulate and cover the fuse component and the connection between the fuse component and the first section and the second section, reducing the risk of the wire harness contacting other components in the energized state. There is a possibility of accident caused by short circuit.

According to some embodiments of the present application, the first insulating member, the second insulating member and the third insulating member are integrally formed.

In the above solution, the first insulating member, the second insulating member and the third insulating member are integrally formed, which can simplify the insulation protection process at the fuse component and reduce the difficulty of repairing the battery wiring harness.

According to some embodiments of the present application, the collection terminal is in contact with the surface of the battery cell and is used to collect temperature information of the battery cell.

In the above solution, the collection terminal is used to collect the temperature information of the battery cell, and the wire harness is used to transmit the electrical signal representing the temperature information of the battery cell collected by the collection terminal.

According to some embodiments of the present application, the battery further includes: a bus component electrically connected to the battery cell; and the collection terminal is in contact with the surface of the bus component for collecting the voltage of the battery cell. information.

In the above solution, the collection terminal is used to collect the voltage information of the battery cell, and the wire harness is used to transmit the electrical signal collected by the collection terminal representing the voltage information of the battery cell.

According to some embodiments of the present application, the battery further includes: a connector connected to the other end of the wire harness and used to output the information collected by the collection terminal.

In the above solution, the connector is used to output the information collected by the collection terminal and provide parameters for the battery management module to analyze the working status of the battery.

The second embodiment of the present application provides an electrical device, including the battery described in the first embodiment of the present application, where the battery is used to provide electric energy.

Since the wiring harness of the battery according to the first embodiment of the present application is easy to repair and the battery can be reused at low cost, the electrical equipment according to the second embodiment of the present application also has a low battery replacement cost.

The third embodiment of the present application proposes a secondary utilization method of battery wiring harness, including:

After the wire harness is fused to form the first section and the second section, a fuse assembly is used to connect the first section and the second section, and the fuse assembly is configured to fuse when the current reaches a preset value.

The wire harness is repaired using the battery wire harness secondary utilization method of the embodiment of the present application. The repaired wire harness can be used twice and has a fuse protection function, which reduces the recycling cost of the battery.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 shows a simple schematic diagram of a vehicle in an embodiment of the present application;

Figure 2 shows a schematic structural diagram of the battery of the vehicle in Figure 1;

Figure 3 shows a schematic isometric view of the battery in a state where the wire harness is not fused (the box is not shown) according to some embodiments of the present application;

Figure 4 shows a schematic structural diagram of the battery from a top view in some embodiments of the present application when the wire harness is not fused (the box and battery cells are not shown);

Figure 5 shows a schematic isometric view of the state in which the first section and the second section are connected using a fuse assembly in the battery according to some embodiments of the present application (the box and the battery cell are not shown);

Figure 6 shows a partial enlarged view of position A in Figure 4;

Figure 7 shows a schematic structural diagram of a fuse assembly in a battery according to some embodiments of the present application;

Figure 8 shows a schematic structural diagram of a state in which a fuse assembly is used to connect the first section and the second section in a battery according to some embodiments of the present application from a top view;

Figure 9 shows a partial enlarged view of B in Figure 8;

Figures 10 and 11 show respectively schematic structural diagrams of two forms of fuse components in batteries according to some embodiments of the present application;

Figures 12 and 13 show schematic diagrams of two connection forms of the first connector and the first section of the fuse assembly of the battery according to some embodiments of the present application;

Figure 14 shows a schematic diagram of the insulation-related structure of the battery in which the wire harness is equipped with a fuse assembly according to some embodiments of the present application;

Figure 15 shows a schematic structural diagram embodying the voltage collection terminal and the temperature collection terminal in the battery of some embodiments of the present application (the fuse part and the fuse assembly are not shown);

Figure 16 shows a schematic diagram of the secondary utilization method of battery wiring harness according to some embodiments of the present application;

The above drawings are not to scale.

Icon: 1000-vehicle; 100-battery; 10-battery cell; 11-casing; 111-casing; 112-cover; 12-electrode terminal; 20-box; 21-first sub-box; 22- The second sub-box; 30-wire harness; 31-fuse part; 311-through hole; 32-first end; 33-second end; 34-first section; 35-second section; 40-collection terminal; 41 -Voltage acquisition terminal; 42-Temperature acquisition terminal; 43-Temperature sensor; 50-Business part; 60-Fuse assembly; 61-Fuse part; 611-Narrow part; 62-First connecting piece; 621-Body; 622-Wing 63-second connecting piece; 64-threaded piece; 71-first insulating piece; 72-second insulating piece; 73-third insulating piece; 80-connector; 200-controller; 300-motor.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions 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 Apply for some of the embodiments, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the technical field of this application; the terms used in the specification of this application are only for describing specific implementations. The purpose of the examples is not intended to limit the application; the terms "including" and "having" and any variations thereof in the description and claims of the application and the above description of the drawings are intended to cover non-exclusive inclusion. The description and claims of this application or the above The terms “first”, “second”, etc. in the drawings are used to distinguish different objects, rather than describing a specific order or primary-secondary relationship.

Reference in this application to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of this application, it should be noted that unless otherwise clearly stated and limited, the terms "installation", "connection", "connection" and "attachment" should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. Detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

"Plural" appearing in this application means two or more (including two).

In this application, the battery cells may include lithium ion secondary batteries, lithium ion primary batteries, lithium-sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of this application. The battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this. Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, prismatic battery cells and soft-pack battery cells.

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

The battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode plate, a negative electrode plate and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector that is not coated with the positive electrode active material layer protrudes from the positive electrode collector that is coated with the positive electrode active material layer. Fluid, the positive electrode current collector without the positive electrode active material layer is used as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the negative electrode collector that is coated with the negative electrode active material layer. Fluid, the negative electrode current collector that is not coated with the negative electrode active material layer is used as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. In order to reduce the possibility of melting due to large current, 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 isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc. In addition, the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.

Multiple battery cells are electrically connected through bus components to realize series, parallel or mixed connection of multiple battery cells. Specifically, the bus part is connected to two electrode terminals of opposite polarity of two adjacent battery cells to realize the series connection of the two battery cells; or the bus part is connected to two adjacent battery cells. The electrode terminals of the same polarity of the battery are connected to realize the parallel connection of the two battery cells; or the busing component is connected to the electrode terminal at the output end to realize the connection between the battery and the external output interface.

The battery also includes a battery sampling system. The battery sampling system includes a wire harness, a collection terminal and a battery management module. The battery management module and the collection terminal are connected through the wire harness. The collection terminal is connected to the busbar or the surface of the battery cell for collecting the data of the battery cell. Information, such as voltage or temperature, etc. The battery cell information collected by the acquisition terminal is transmitted to the battery management module through the wiring harness. When the battery management module detects that the battery cell information exceeds the normal range, it will limit the output power of the battery to reduce the risk of accidents.

In related art, the wire harness of the battery sampling system is formed with a fuse. When the current of the wire harness exceeds the threshold, the fuse is blown to cut off the current path and reduce potential risks. However, this type of wire harness is damaged after it is fused. When the battery is reused, it needs to be replaced with a new wire harness to complete the repair of the scrapped battery. Considering that both ends of the wire harness are also connected to other components of the battery, the process of replacing the new wire harness requires removing the damaged wire harness from other components of the battery, and then connecting the new wire harness to other components of the battery. Not only is the repair process cumbersome, Complex and costly.

The inventor found through research that if the connection between the damaged wire harness and other components of the battery is maintained, and the fuse of the damaged wire harness is repaired to restore the conductive function and fuse protection function, there is no need to remove the damaged wire harness from other parts of the battery. By dismantling the components and no need to prepare new wiring harnesses, the used batteries can be repaired.

Based on the above ideas, the inventor of the present application proposed a technical solution, using a fuse assembly to connect the fused wire harness, which can not only repair the conductive function and fuse protection function of the wire harness, but also eliminate the need to replace the new wire harness, and simplify the recycling of the battery. Utilization process to reduce battery recycling costs.

It can be understood that the battery cells described in the embodiments of the present application can directly supply power to electrical equipment, or they can be connected in parallel or in series to form batteries to power various electrical devices in the form of batteries.

It can be understood that the electrical equipment that uses battery cells or batteries described in the embodiments of the present application can be in various forms, such as mobile phones, portable devices, laptops, battery cars, electric vehicles, ships, spacecraft, Electric toys and electric tools, etc., for example, 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 aircraft toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planer.

The battery cells and batteries described in the embodiments of the present application are not limited to the above-described electrical equipment, but can also be applied to all electrical equipment using battery cells and batteries. However, for the sake of simplicity of description, the following embodiments All are explained using electric vehicles as an example.

FIG. 1 shows a simple schematic diagram of a vehicle in an embodiment of the present application; FIG. 2 shows a schematic structural diagram of the battery of the vehicle in FIG. 1 .

As shown in FIG. 1 , a battery 100 , a controller 200 and a motor 300 are disposed inside a vehicle 1000 . For example, the battery 100 may be disposed at the bottom, front or rear of the vehicle 1000 . The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

In some embodiments of the present application, 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 . The controller 200 is used to control the battery 100 to provide power to the motor 300, for example, to meet the power requirements for starting, navigation and driving of the vehicle 1000.

In other embodiments, the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

The battery 100 mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells 10 to provide higher voltage and capacity. For example, the battery 100 is composed of a plurality of battery cells 10 connected in series or in parallel.

As shown in Figure 2, the battery 100 includes a battery cell 10, a bus part (not shown) and a box 20. The battery cell group 10 includes a plurality of battery cells 10, and the plurality of battery cells 10 are connected in parallel through the bus part. Either in series or in mixed combination, high-voltage output is achieved. Multiple battery cells 10 and bus components are assembled and placed inside the box 20 .

The box 20 includes a first sub-box 21 and a second sub-box 22. The first sub-box 21 and the second sub-box 22 cover each other to form a battery cavity, and a plurality of battery cells 10 are placed in the battery cavity. . The shapes of the first sub-box 21 and the second sub-box 22 may be determined according to the combined shapes of the plurality of battery cells 10 , and each of the first sub-box 21 and the second sub-box 22 may have an opening. For example, both the first sub-box 21 and the second sub-box 22 can be hollow rectangular parallelepipeds and each has only one open surface. The openings of the first sub-box 21 and the second sub-box 22 are arranged oppositely, and the first sub-box 21 and the second sub-box 22 are arranged oppositely. The sub-box 21 and the second sub-box 22 are coupled with each other to form a box 20 with a closed chamber. A plurality of battery cells 10 are connected in parallel or in series or in a mixed combination and then placed in a box 20 formed by fastening the first sub-box 21 and the second sub-box 22 .

In some embodiments of the present application, the box 20 is in the shape of a hexahedron, the first sub-box 21 has space for placing multiple battery cells 10 inside, and the second sub-box 22 is fastened to the first sub-box. 21 to seal the plurality of battery cells 10 inside the box 20 , the battery cells 10 are in the shape of a hexahedron, and the plurality of battery cells 10 are placed inside the box 20 .

In other embodiments, the box 20 may also be in the shape of a cylinder or other shapes.

Figure 3 shows a schematic isometric view of the battery in a state where the wire harness is not fused according to some embodiments of the present application (the box is not shown).

As shown in FIG. 3 , in some embodiments of the present application, multiple battery cells 10 are arranged side by side along the first direction X, the length direction of each battery cell 10 extends along the second direction Y, and the width direction extends along the first direction Y. The direction X extends, and the height direction is along the third direction Z extend.

In other embodiments, multiple battery cells 10 may also be arranged side by side along the second direction Y or other directions.

As shown in FIG. 3 , each battery cell 10 includes a case 11 , an electrode assembly (not shown), and two electrode terminals 12 . The casing 11 may be in the shape of a hexahedron or other shapes, and an accommodation cavity is formed inside the casing 11 for accommodating the electrode assembly and the electrolyte. The housing 11 includes a housing 111 and a cover 112. One end of the housing 111 has an opening so that the electrode assembly can be placed inside the housing 111 through the opening. The housing 111 may be made of metallic material, such as aluminum, aluminum alloy, or nickel-plated steel. The electrode assembly is disposed inside the housing 111 . The cover 112 is provided with two electrode lead-out holes, and the two electrode terminals 12 are disposed in the two electrode lead-out holes of the cover 112 . Of the two electrode terminals 12 , one is a positive electrode terminal and the other is a negative electrode terminal. The electrode assembly includes two tabs, one of which is a positive tab and the other is a negative tab. The positive electrode terminal is connected to the positive tab of the electrode assembly, and the negative electrode terminal is connected to the negative tab of the electrode assembly.

In some embodiments of the present application, the housing 111 is in the shape of a rectangular parallelepiped. An opening is provided on one side of the housing 111 along the third direction Z. The cover 112 closes the opening on one side of the housing 111 in the third direction Z. Two The electrode terminals 12 are all disposed on the cover 112 , that is, located on the same side of the battery unit 10 along the third direction Z.

In other embodiments, the housing 111 may also be in another shape such as a cylinder, and the electrode terminal 12 may also be provided on the housing 111 .

One end of the electrode terminal 12 extends into the interior of the battery cell 10 and is connected to the same polarity through the current collecting member, and the other end is exposed outside the cover 112 to be connected to the busing member 50 . The voltage information on the bus component 50 and the temperature information on the cover 112 can reliably reflect the working status of the battery cells 10 to which they are connected. Sampling the bus component 50 or the cover 112 can reliably monitor the battery cells 10 working status.

Specifically, the collection terminal 40 and the bus component 50 or the battery cell 10 may be connected by welding, or may be detachably connected by snapping or the like.

Figure 4 shows a schematic structural diagram of the battery from a top view in some embodiments of the present application when the wire harness is not fused (the box and battery cells are not shown); Figure 5 shows some implementations of the present application. A schematic isometric view of the battery in this example using a fuse assembly to connect the first and second sections (the box and battery cells are not shown).

As shown in Figures 3, 4 and 5, some embodiments of the present application provide a battery 100, including a battery cell 10, a wire harness 30 and a fuse assembly 60. The collection terminal 40 is used to collect information about the battery cell 10. One end of the wire harness 30 is connected to the collection terminal 40 , and the wire harness 30 is configured to fuse to form a first section 34 and a second section 35 when the current reaches a first preset value. The fuse component 60 is used to connect the first section 34 and the second section 35, and the fuse component 60 is configured to fuse when the current reaches the second preset value.

It can be understood that the wire harness 30 in the embodiment of the present application is a low-voltage wire harness 30 used in the sampling system to transmit electrical signals representing information about the battery cells 10 . The cross section of the wire harness 30 may be circular, elliptical, square or rectangular, etc. The wire harness 30 may be in a linear shape extending fixedly in a certain direction, or the wire harness 30 may be bent along its extension direction.

As shown in Figure 5, the wire harness 30 includes a first end 32 and a second end 33. The first end 32 is used to connect to the collection terminal 40, and the second end 33 is used to output the information collected by the collection terminal 40 to the battery 100 management module. electrical signal.

The first end 32 can be integrally formed with the collection terminal 40, or can be provided separately and connected. There may be one collection terminal 40 , and one collection terminal 40 is used to collect voltage or temperature information of the battery cell 10 . There may also be multiple collection terminals 40 , and the plurality of collection terminals 40 may all be used to collect voltage or temperature information of the battery cells 10 , or some of the collection terminals 40 may be used to collect voltage information of the battery cells 10 , and the other part may be used to collect the voltage information of the battery cells 10 . The terminal 40 is used to collect temperature information of the battery cell 10 . In some embodiments of the present application, the wire harness 30 corresponds to the collection terminal 40 one-to-one, the portion of the wire harness 30 close to the second section 35 extends along the first direction X, and the portion of the wire harness 30 close to the first end 32 extends along the first direction The direction X or the second direction Y extends, and the plurality of wire harnesses 30 are arranged side by side along the second direction Y.

The second terminal 33 may be directly connected to the battery management module, or may be indirectly connected through a middleware. As shown in FIG. 4 , in some embodiments of the present application, the second ends 33 of multiple wire harnesses 30 are collectively connected to one connector 80 , and are connected to the battery 100 management module through the connector 80 .

As shown in FIG. 4 , the first section 34 refers to the portion from the first end 32 of the wire harness 30 to the fuse portion 31 , and the second section 35 refers to It is the part from the second end 33 of the wire harness 30 to the fuse part 31 . After the fuse part 31 is blown, a discontinuity is formed on the wire harness 30. The fuse component 60 is installed at the discontinuity to connect the first section 34 and the second section 35 so that the wire harness 30 can restore its conductive function and fuse protection function.

The fuse component 60 is configured to fuse when the current reaches the second preset value. The second preset value may be the same as the first preset value, so that the wire harness 30 maintains the original current fuse threshold and the repaired battery 100 maintains the original performance of reducing accident risk. The second preset value may also be different from the first preset value. For example, the second preset value may be greater than the first preset value, so that the repaired battery 100 has better performance in reducing accident risk. The length, width and thickness of the fuse component 60 are similar to the length, width and thickness of the fuse part 31. After the fuse component 60 is installed at the discontinuity of the wire harness 30 to connect the first section 34 and the second section 35, the fuse component 60 will not protrude significantly. out of other parts of the wire harness 30, thereby minimizing the additional space occupied by the wire harness 30 while repairing it. The fuse component 60 may be a common fuse, or may be a metal component with the same structure as the fuse part 31 of the wire harness 30 .

In the battery 100 in the embodiment of the present application, the wire harness 30 is fused when the current reaches the first preset value to form the first section 34 and the second section 35. After the battery 100 is recycled, the first section 34 and the second section 35 are connected by using the fuse assembly 60. The second section 35 is to repair the wire harness 30 and provide the wire harness 30 with a fuse protection function to achieve low-cost secondary use of the battery 100 .

In some embodiments of the present application, the first preset value and the second preset value are the same.

There are many ways to realize that the first preset value and the second preset value are the same. For example, the material of the fusing component of the fuse assembly 60 (i.e., the fuse 61 described below) is the same as the material of the wire harness 30 . The flow area is the same. For another example, by adjusting the material and overflow area of the fusing component of the fuse assembly 60 (that is, the fuse 61 described below) and the wire harness 30, they can be blown under the same current threshold.

In the above solution, after using the fuse assembly 60 to connect the first section 34 and the second section 35, the fuse current threshold of the wire harness 30 is the same, so that the reused battery 100 maintains its original performance of reducing accident risks.

FIG. 6 shows a partial enlarged view of position A in FIG. 4 .

As shown in FIGS. 4 and 6 , in some embodiments of the present application, the wire harness 30 includes a fuse portion 31 , and the flow area of the fuse portion 31 is smaller than the flow area of other parts of the wire harness 30 .

For example, when the cross-section of the wire harness 30 is rectangular, the thickness direction of the wire harness 30 extends along the third direction Z, the wire harness 30 may have a through hole along the thickness direction, and the fuse portion 31 is formed at the through hole; for another example, the cross-section of the wire harness 30 is circular. or other shapes, the surface of the wire harness 30 is recessed to form a local narrow structure, and the narrow structure forms the fuse portion 31 .

As shown in FIG. 6 , in some embodiments of the present application, the wire harness 30 is in a flat shape with the thickness direction extending along the third direction Z. The wire harness 30 has a plurality of through holes 311 along the length direction of the wire harness 30 ( That is, they are distributed at intervals in the first direction (X), and the portion of the wire harness 30 where the through holes 311 are provided forms the fuse portion 31 .

In other embodiments, both sides of the wire harness 30 in the width direction can also be recessed inward, so that the wire harness 30 has a local narrow structure to form the fuse portion 31 .

In the above solution, the overflow area of the fuse part 31 is smaller than the overflow area of other parts of the wire harness 30 . When the current through the wire harness 30 reaches the first preset value, the temperature of the fuse part 31 is higher than that of other parts of the wire harness 30 . The temperature can fuse before other parts of the wire harness 30, cut off the current path, and reduce the possibility of accidents caused by excessive current in the wire harness 30, thereby enabling the battery 100 to have better performance in reducing accident risks.

Figure 7 shows a schematic structural diagram of a fuse assembly in a battery according to some embodiments of the present application; Figure 8 shows a top view of a first section and a second section connected using a fuse assembly in a battery according to some embodiments of the present application. Structural diagram of the state; Figure 9 shows a partial enlarged view of B in Figure 8.

As shown in Figures 7, 8 and 9, in some embodiments of the present application, the fuse assembly 60 includes a fuse 61, a first connecting piece 62 and a second connecting piece 63. The fuse 61 is configured to when the current reaches When the second preset value is fused, the first connecting piece 62 and the second connecting piece 63 are respectively connected to both ends of the fuse piece 61. The first connecting piece 62 is used to connect to the first section 34, and the second connecting piece 63 is used to connect to the first section 34. Connect with the second segment 35.

Figures 10 and 11 show respectively schematic structural diagrams of two forms of fuse components in batteries according to some embodiments of the present application.

The fuse 61, the first connecting member 62 and the second connecting member 63 may be of an integrally formed structure, and the fuse 61, the first connecting member 62 and the second connecting member 63 may also be provided separately and then connected as one body. For example, as shown in FIG. 10 , the fuse assembly 60 can be a metal component with a narrow portion 611 in the middle along the length direction of the component (ie, the first direction X). The narrow portion 611 has a relatively large flow area. Small and configured as a fuse 61, the two ends of this component are configured as a first connector 62 and a second connector 63 respectively; for another example, as shown in Figure 11, the fuse 61 is a metal wire, and the first connector 62 and the second connecting piece 63 both have threaded holes, use the threaded piece 64 to screw into the corresponding threaded hole, the end of the metal wire is wrapped around the threaded piece 64, and one threaded piece 64 is tightened to the threaded hole of the first connecting piece 62 to achieve The first connecting member 62 is connected to the fuse member 61 , and the other threaded member 64 is tightened in the threaded hole of the second connecting member 63 to connect the second connecting member 63 to the fuse member 61 .

12 and 13 are schematic diagrams of two connection forms of the first connector and the first section of the fuse assembly of the battery according to some embodiments of the present application.

Based on the aforementioned connection method of the first connector 62 and the first section 34 and the connection method of the second connector 63 and the second section 35 , the repair process of the wire harness 30 can be simplified.

Taking the first connecting member 62 as an example, as shown in FIG. 12 , the first connecting member 62 and the first section 34 are stacked along the thickness direction of the first section 34 (ie, the third direction Z). The first section 34 is welded and connected; as shown in Figure 13, the first connecting member 62 can also extend along the width direction of the first section 34 (ie, the second direction Y) and form a body 621 and a wing portion 622. The wing portion 622 is bent. Fold so that the body 621 and the wings 622 are attached to and connected to the first section 34 from both sides in the thickness direction. It can be understood that the first connecting member 62 and the first section 34 can be connected by welding, or can be electrically connected by crimping, riveting, gluing, or other methods.

In the above solution, after using the fuse assembly 60 to connect the first section 34 and the second section 35, the fuse assembly 60 connects the first section 34 and the second section 35 through the first connecting piece 62 and the second connecting piece 63. The fuse assembly 61 When the current reaches the second preset value, it fuses and cuts off the current path, thereby reducing the possibility of accidents caused by excessive current in the wire harness 30, thereby allowing the reused battery 100 to have better performance in reducing accident risks.

In some embodiments of the present application, the flow area of the fuse member 61 is smaller than the flow areas of the first connecting member 62 and the second connecting member 63 .

Similar to the fuse part 31 of the wire harness 30 , the cross section of the fuse part 31 may be circular, oval, square, rectangular, etc. After the fuse assembly 60 connects the first section 34 and the second section 35, when the current of the wire harness 30 reaches the second preset value, the fuse 61 precedes the first section 34, the second section 35, the first connecting piece 62 and the second The connector 63 is fused to reduce the possibility of an accident caused by excessive current in the wire harness 30 . For example, the fuse 61 may be a metal wire or a narrow strip-shaped metal sheet.

In the above solution, the flow area of the fuse 61 is smaller than the flow area of the first connecting member 62 and the second connecting member 63. When the current through the wire harness 30 reaches the second preset value, the temperature of the fuse 61 is higher than the second preset value. The temperature of the first connecting piece 62 and the second connecting piece 63 can melt before the first connecting piece 62 and the second connecting piece 63 , cutting off the current path and reducing the possibility of accidents caused by excessive current in the wire harness 30 .

Figure 14 shows a schematic structural diagram of the insulation-related structure of the battery in which the fuse assembly is installed in the wire harness according to some embodiments of the present application.

As shown in FIG. 14 , in some embodiments of the present application, the battery 100 further includes a first insulating member 71 , a second insulating member 72 and a third insulating member 73 . The first insulating member 71 is used to insulate and cover the first connection. The second insulating member 72 is used to insulate and cover the connection between the second connecting member 63 and the second section 35 , and the third insulating member 73 is used to insulate and cover the fuse member 61 .

The materials of the first insulating member 71 , the second insulating member 72 and the third insulating member 73 may be the same or different.

As shown in Figure 14, in some embodiments of the present application, the third insulating member 73 is a hard plastic shell 111. Both ends of the third insulating member 73 have openings, and the fuse 61 is penetrated through the third insulating member. Inside the third insulating member 73 , the connection between the fuse 61 and the first connecting member 62 and the connection between the fuse 61 and the second connecting member 63 are located inside the third insulating member 73 , and are insulated and protected by the third insulating member 73 . The first connecting member 62 and the second connecting member 63 respectively expose openings at both ends of the third insulating member 73 . The interior of the third insulating member 73 is filled with insulating glue to fix the third insulating member 73 and the fuse member 61 . The first insulating member 71 and the second insulating member 72 are both formed by dispensing glue. Specifically, the connection between the first connecting member 62 and the first section 34 and the connection between the second connecting member 63 and the second section 35 Drop insulating glue respectively. After the insulating glue is cured, the insulation covers the connection between the first connecting piece 62 and the first section 34 and the first section 34 . The connection between the two connecting members 63 and the second section 35 forms a first insulating member 71 and a second insulating member 72 .

In other embodiments of the present application, the first insulating member 71 , the second insulating member 72 and the third insulating member 73 may all be insulating tapes. The third insulating member 73 is wrapped around the fuse assembly 60 , and the insulation protection fuse member 61 The first connecting member 62 and the second connecting member 63 are exposed at the same time. The first insulating member 71 is wrapped around the connection between the first connecting member 62 and the first section 34 , and the second insulating member 72 is wrapped around the second connecting member 63 and the first section 34 . The junction of the second section 35.

It can be understood that the wire harness 30 includes a wire harness body and an insulating layer covering the outer circumferential surface of the wire harness 30. The remaining parts of the wire harness 30 have an insulating layer for insulation protection, so that the wire harness 30 can conduct electricity while not coming into contact with other components. catch.

In the above solution, the first insulating member 71 , the second insulating member 72 and the third insulating member 73 can insulate and cover the fuse assembly 60 and the connection between the fuse assembly 60 and the first section 34 and the second section 35 , thereby reducing the wire harness. 30 There is a possibility of accidents due to short circuit with other components when the power is on.

In some embodiments of the present application, the first insulating part 71 , the second insulating part 72 and the third insulating part 73 are integrally formed.

For example, the first insulating member 71 , the second insulating member 72 and the third insulating member 73 can be a piece of insulating tape. After the fuse assembly 60 is installed on the wire harness 30 , the insulating tape is used to wrap around the fuse assembly 60 and between the fuse assembly 60 and the first insulating member. The connection between the segment 34 and the second segment 35 forms an integrally formed first insulating member 71 , a second insulating member 72 and a third insulating member 73 . For another example, the first insulating member 71 , the second insulating member 72 and the third insulating member 73 can be formed using a glue dispensing process. After the fuse assembly 60 is installed on the wire harness 30 , insulating glue is dropped into the fuse assembly 60 and the insulating glue is wrapped. At the connection points between the fuse assembly 60 and the fuse assembly 60 and the first section 34 and the second section 35 , the insulating glue is cured to form an integrally formed first insulating part 71 , a second insulating part 72 and a third insulating part 73 .

In the above solution, the first insulating member 71 , the second insulating member 72 and the third insulating member 73 are integrally formed, which can simplify the insulation protection process at the fuse assembly 60 and reduce the difficulty of repairing the wiring harness 30 of the battery 100 .

Figure 15 shows a schematic structural diagram of a voltage collection terminal and a temperature collection terminal in a battery according to some embodiments of the present application (the fuse part and the fuse assembly are not shown).

As shown in FIG. 3 and FIG. 15 , in some embodiments of the present application, the collection terminal 40 is in contact with the surface of the battery cell 10 for collecting the temperature information of the battery cell 10 .

As shown in FIG. 3 and FIG. 15 , at least one of the plurality of collection terminals 40 is a temperature collection terminal 42 . The temperature collection terminal 42 is in contact with the surface of the cover 112 to collect the temperature information of the battery cell 10 and the temperature. The wire harness 30 corresponding to the collection terminal 42 is used to transmit electrical signals representing temperature information. One end of the temperature collection terminal 42 is connected to the corresponding wire harness 30 , and the other end is connected to a temperature sensor 43 . The temperature sensor 43 is in contact with the surface of the cover 112 . The temperature collection terminal 42 collects the temperature information of the battery cell 10 through the temperature sensor 43 .

The temperature collection terminal 42 can be provided separately from the corresponding wire harness 30 , or can be directly at the end of the wire harness 30 . In some embodiments of the present application, the end of the wire harness 30 does not include an insulating layer, and the wire harness body exposes the insulating layer and is connected to the temperature sensor 43 . In other embodiments, the temperature sensor 43 may be fixed to the battery cell 10 through a bracket, the temperature collection terminal 42 is provided separately from the corresponding wire harness 30 and connected, and the temperature collection terminal 42 is inserted into the bracket to connect with the temperature sensor 43 .

In the above solution, the collection terminal 40 is used to collect the temperature information of the battery cell 10 , and the wire harness 30 is used to transmit the electrical signal representing the temperature information of the battery cell 10 collected by the collection terminal 40 .

As shown in Figure 3 and Figure 15, in some embodiments of the present application, the battery 100 also includes a bus component 50, which is electrically connected to the battery cell 10; the collection terminal 40 is in contact with the surface of the bus component 50. To collect the voltage information of the battery cell 10.

At least one of the plurality of collection terminals 40 is a voltage collection terminal 41. The voltage collection terminal 41 is in contact with the surface of the bus component 50 to collect the voltage information of the battery cell 10. The wire harness 30 corresponding to the voltage collection terminal 41 is used for Transmits electrical signals representing voltage information.

The voltage collection terminal 41 can be provided separately from the corresponding wire harness 30 , or can be directly at the end of the wire harness 30 . In some embodiments of the present application, the end of the wire harness 30 does not include an insulating layer, and the wire harness body exposes the insulating layer and is connected to the voltage sensor. In other embodiments, the voltage collection terminal 41 and the corresponding wire harness 30 may be separately provided and connected.

In the above solution, the collection terminal 40 is used to collect the voltage information of the battery cell 10 , and the wire harness 30 is used to transmit the electrical signal representing the voltage information of the battery cell 10 collected by the collection terminal 40 .

As shown in FIG. 4 , in some embodiments of the present application, the battery 100 further includes a connector 80 , which is connected to the other end of the wire harness 30 and used to output the information collected by the collection terminal 40 .

One end of the collection terminal 40 is connected to the bus component 50 or the battery cell 10, and the other end is connected to the connector 80. The connector 80 is used to connect to the battery management module to transmit the information of the battery cell 10 collected by the collection terminal 40. to the battery management module to provide parameters for the battery management module to analyze the working status of the battery 100 .

Specifically, the connector 80 includes a signal input terminal and a signal output terminal. The signal input terminal is connected to the second end 33 of the wire harness 30 . The signal output terminal is used to connect to the battery management module to output the information collected by the collection terminal 40 . to the battery management module.

It can be understood that the battery management module may be a component located inside the box 20 or a component located outside the box 20 . In some embodiments of the present application, the battery management module is disposed inside the box 20 , and the connector 80 is plugged into the battery management module. In other embodiments, the battery management module is disposed outside the box 20 , and the box 20 is provided with an output interface. The connector 80 is plugged into the output interface, and the output interface is connected to the battery management module outside the battery 100 .

In the above solution, the connector 80 is used to output the information collected by the collection terminal 40 and provide parameters for the battery 100 management module to analyze the working status of the battery 100 .

Some embodiments of the present application provide an electrical device, including a battery 100, where the battery 100 is used to provide electrical energy.

Since the wiring harness 30 of the battery 100 in the embodiment of the present application is easy to repair, the battery 100 can be reused at low cost. Therefore, the electrical equipment of the embodiment of the present application also has a low replacement cost of the battery 100 .

Figure 16 shows a schematic diagram of a secondary utilization method of a battery wire harness according to some embodiments of the present application.

As shown in Figure 16, some embodiments of the present application propose a secondary utilization method S100 of battery wiring harness, including:

S110: After the wire harness 30 is fused to form the first section 34 and the second section 35, use the fuse assembly 60 to connect the first section 34 and the second section 35. The fuse assembly 60 is configured to fuse when the current reaches a preset value.

It can be understood that the secondary utilization method S100 of the battery wire harness according to the embodiment of the present application includes but is not limited to being implemented using the battery 100 of the embodiment of the present application.

In some embodiments of the present application, S110: After the wire harness 30 is fused to form the first section 34 and the second section 35, the fuse assembly 60 is used to connect the first section 34 and the second section 35, and the fuse assembly 60 is configured as Fuses when the current reaches a preset value, including:

S111: The wire harness 30 has a fuse portion 31. When the current of the wire harness 30 reaches the first preset value, the fuse portion 31 of the wire harness 30 is blown to form the first section 34 and the second section 35;

S112: Use the first connector 62 of the fuse assembly 60 to connect to the first section 34, and the second connector 63 to connect to the second section 35 to repair the wire harness 30;

S113: When the current of the repaired wire harness 30 reaches the second preset value, the fuse component 60 is blown to reduce the possibility of an accident caused by excessive current in the wire harness 30 .

The wire harness 30 of the battery 100 is repaired using the secondary utilization method of the wire harness 30 of the battery 100 according to the embodiment of the present application. The repaired wire harness 30 can be reused and has a fuse protection function, which reduces the recycling cost of the battery 100.

As shown in FIGS. 1 to 16 , some embodiments of the present application provide a battery 100 , including a battery cell 10 , a bus component 50 , a wire harness 30 , a collecting terminal 40 , a fuse assembly 60 and a connector 80 and the collecting terminal 40 There are multiple collection terminals 40 corresponding to the wire harness 30. The first end 32 of each wire harness 30 is integrally formed with the collection terminal 40, and the other end is connected to the connector 80. The connector 80 is used to connect to the battery management module. The voltage or temperature information collected by the collection terminal 40 is transmitted to the battery management module.

Each wire harness 30 includes a fuse portion 31 . The cross-sectional area of the fuse portion 31 is smaller than the cross-sectional area of other parts of the wire harness 30 . When the current of 30 reaches the first preset value, the fuse part 31 generates heat and fuses, cutting off the current path in time. At this time, the wire harness 30 forms the first section 34 and the second section 35, and the wire harness 30 is damaged, causing the battery 100 to fail to operate normally.

The fuse assembly 60 includes a fuse member 61, a first connecting member 62 and a second connecting member 63. The first connecting member 62 and the second connecting member 63 are respectively led out from both ends of the fuse member 61. The fuse assembly 60 is used to connect between the first section 34 and the second section 35 , the first connecting piece 62 is connected to the first section 34 , and the second connecting piece 63 is connected to the second section 35 , which not only repairs the damaged wire harness 30 but also The fuse component 60 replaces the original fuse part 31 to restore the conductive function and fuse protection function of the wire harness 30 to prevent the entire battery 100 from being scrapped.

Since the battery 100 relies on the fuse portion 31 of the wire harness 30 for fuse protection when used for the first time, and when used for the second time, the fuse assembly 60 is used for fuse protection, which not only realizes low-cost repair of the wire harness 30, but also simplifies the maintenance process. Low-cost secondary utilization of the battery 100 is achieved.

It should be noted that, as long as there is no conflict, the features in the embodiments of this application can be combined with each other.

The above are only some embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

A battery including:

Battery cells;

A collection terminal used to collect information about the battery cell;

A wire harness, one end of the wire harness is connected to the collection terminal, the wire harness is configured to fuse to form a first section and a second section when the current reaches a first preset value;

A fuse component is used to connect the first section and the second section, and the fuse component is configured to fuse when the current reaches a second preset value.
The battery according to claim 1, wherein the first preset value and the second preset value are the same.
The battery according to claim 1 or 2, wherein the wire harness includes a fuse part, and the flow area of the fuse part is smaller than the flow area of other parts of the wire harness.
The battery according to any one of claims 1-3, wherein the fuse component includes:

a fuse configured to blow when the current reaches the second preset value;

A first connecting piece and a second connecting piece are respectively connected to both ends of the fuse piece. The first connecting piece is used to connect to the first section, and the second connecting piece is used to connect to the second section. segment connection.
The battery according to claim 4, wherein the flow area of the fuse is smaller than the flow areas of the first connecting member and the second connecting member.
The battery according to claim 4 or 5, wherein the battery further includes:

A first insulating member, used to insulate and cover the connection between the first connecting member and the first section;

a second insulating member, used to insulate and cover the connection between the second connecting member and the second section;

The third insulating component is used to insulate and cover the fuse component.
The battery according to claim 6, wherein the first insulating member, the second insulating member and the third insulating member are integrally formed.
The battery according to any one of claims 1 to 7, wherein the collection terminal is in contact with the surface of the battery cell for collecting temperature information of the battery cell.
The battery according to any one of claims 1-8, wherein the battery further includes:

A bus component, electrically connected to the battery cell;

The collection terminal is in contact with the surface of the bus component and is used to collect the voltage information of the battery cell.
The battery according to any one of claims 1-9, wherein the battery further includes:

A connector is connected to the other end of the wiring harness and used to output the information collected by the collection terminal.
An electrical device, including the battery according to any one of claims 1 to 10, wherein the battery is used to provide electrical energy.
A secondary utilization method of battery wiring harness, including:

After the wire harness is fused to form the first section and the second section, a fuse assembly is used to connect the first section and the second section, and the fuse assembly is configured to fuse when the current reaches a preset value.