Wire harness plate assembly, battery device and electric equipment

Abstract

The utility model discloses a wire harness plate assembly, a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a battery box body, a plurality of battery monomers arranged in the battery box body and the wire harness plate assembly, and the wire harness plate assembly comprises a wire harness plate and a fire extinguishing structure; the wire harness plate is arranged above the battery monomers; the fire extinguishing structures are arranged on the wire harness plate, at least one fire extinguishing structure is located above one battery monomer, and the fire extinguishing structures are configured to release fire extinguishing materials to the corresponding battery monomers when being heated; the fire extinguishing structure is a fire extinguishing capsule, the fire extinguishing capsule comprises a shell and a fire extinguishing material arranged in the shell, and the shell is configured to be melted when heated. According to the technical scheme provided by the invention, the problem that the circuit on the wire harness plate is damaged due to large-area melting or fire breakout of the plastic wire harness plate in a thermal runaway state of the battery monomers can be solved.

Description

Technical Field

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

[0002] CCS (Cell Connection System) is also called battery connection system. It provides battery temperature sampling, battery cell voltage sampling functions and realizes high-voltage series and parallel connection between battery cells. It provides temperature and voltage signals to the battery pack BMS (Battery Management System) through sampling lines or FPC (flexible circuit board) and connector components. FPC type sampling lines can also provide fuse functions to reduce losses caused by excessive current. BMS uses CCS to monitor / control the charging and discharging operation status of battery cells, modules and battery packs.

[0003] CCS is an important component of the battery, in which the wiring harness board is used to achieve electrical isolation from the battery cell and fix the wiring harness. However, the CCS in the related technology does not have an active targeted fire prevention / extinguishing function. When the battery cell is in a thermal runaway state, it releases continuous high temperature and sparks, and heat diffusion will occur. Since the wiring harness board is usually made of plastic board, the plastic wiring harness board will melt or catch fire over a large area, damaging the circuit on the wiring harness board. Utility Model Content

[0004] In view of the above problems, the present application provides a wiring harness board assembly, a battery device and an electrical device, aiming to solve the problem that when the battery cell is in a thermal runaway state, the plastic wiring harness board may melt or catch fire over a large area, thereby damaging the circuits on the wiring harness board.

[0005] The present application provides a battery device, including a battery case, a plurality of battery cells arranged in the battery case, and a wiring harness plate assembly, the wiring harness plate assembly including a wiring harness plate and a fire extinguishing structure; the wiring harness plate is arranged above the battery cell; the fire extinguishing structure is arranged on the wiring harness plate, and a plurality of fire extinguishing structures are provided, at least one fire extinguishing structure is located above a battery cell, and the fire extinguishing structure is configured to release fire extinguishing material to the corresponding battery cell when heated; the fire extinguishing structure is a fire extinguishing capsule, the fire extinguishing capsule includes an outer shell and a fire extinguishing material arranged inside the outer shell, and the outer shell is configured to melt when heated.

[0006] In the technical solution of the embodiment of the present application, in the technical solution of the present application, a fire extinguishing structure is correspondingly provided above all battery cells. When a certain battery cell is in a thermal runaway state and releases high temperature and sparks, the high temperature and sparks will be transmitted to the fire extinguishing structure corresponding to the battery cell. After being heated, the fire extinguishing structure releases fire extinguishing materials to the corresponding battery cell, which can extinguish the sparks and prevent the spread of high temperature and sparks, thereby solving the problem that when a battery cell is in a thermal runaway state, it causes large-area melting or ignition of the plastic wire harness board and damages the circuits on the wire harness board. In addition, by designing the fire extinguishing structure as a fire extinguishing capsule, the outer shell can be quickly melted after the fire extinguishing structure is heated, so as to destroy the wrapping of the outer shell on the fire extinguishing materials, so that the fire extinguishing materials can fall on the corresponding battery cell to extinguish the fire source generated on the battery cell.

[0007] In some embodiments, the wire harness board is provided with an inner cavity, and the fire extinguishing structure is arranged in the inner cavity. With such a design, by arranging the fire extinguishing structure in the inner cavity of the wire harness board, it can be ensured that the fire extinguishing structure will not interfere with the pole columns or other structures on the battery cell during normal use, so as to realize the reliable installation of the fire extinguishing structure; when a certain battery cell is in a thermal runaway state and releases high temperature and sparks, the high temperature and sparks will first be transmitted to the area between the wire harness board corresponding to the battery cell and the fire extinguishing structure. When the high temperature and sparks burn through the corresponding area of the wire harness board, they will continue to be transmitted to the fire extinguishing structure corresponding to the battery cell. After being heated, the fire extinguishing structure releases fire extinguishing materials to the corresponding battery cell, which can extinguish the sparks and prevent the spread of high temperature and sparks to other positions of the wire harness board, preventing large-area melting or ignition of the plastic wire harness board.

[0008] In some embodiments, the wire harness board is provided with a smoke exhaust port communicating the inner cavity and the outside. With such a design, since there will be gas remaining in the inner cavity of the wire harness board when the fire extinguishing structure releases fire extinguishing materials upon heating, the designed smoke exhaust port can discharge the gas in the inner cavity to the outside, preventing a large amount of gas from accumulating in the inner cavity of the wire harness board and causing the phenomenon of the wire harness board swelling and deforming.

[0009] In some embodiments, the wire harness board is further provided with a smoke exhaust channel, and the smoke exhaust port communicates with the outside through the smoke exhaust channel. With such a design, after the gas in the inner cavity of the wire harness board is discharged from the smoke exhaust port, it can be diverted through the smoke exhaust channel to smoothly discharge the gas to the outside, preventing the gas from accumulating inside the battery box.

[0010] In some embodiments, the wire harness board has a length direction, and the smoke exhaust channel extends along the length direction of the wire harness board and penetrates through opposite sides of the wire harness board. With such a design, the gas flowing out from the smoke exhaust port can flow into the smoke exhaust channel, and then the gas is diverted to both sides of the wire harness board through the smoke exhaust channel, enabling the gas to be discharged to the outside more quickly.

[0011] In some embodiments, the smoke exhaust port and the smoke exhaust channel are both provided on the side of the wire harness board close to the battery cell. Such a design can not only enable the gas inside the wire harness board to flow from the smoke exhaust port to the smoke exhaust channel and then be smoothly guided to the outside under the guidance of the smoke exhaust channel, but also enable the gas generated after the fire extinguishing material is released to the corresponding battery cell to be smoothly guided to the outside under the guidance of the smoke exhaust channel.

[0012] In some embodiments, part of the fire extinguishing structure protrudes from the bottom of the wire harness board; or, the fire extinguishing structure is provided at the bottom of the wire harness board. Such a design can make at least part of the fire extinguishing structure located at the bottom of the wire harness board. When a certain battery cell is in a thermal runaway state and releases high temperature and sparks, the high temperature and sparks will be directly transmitted to the fire extinguishing structure corresponding to the battery cell. After being heated, the fire extinguishing structure releases the fire extinguishing material to the corresponding battery cell, thus extinguishing the sparks, which can improve the fire extinguishing speed and reduce the influence of high temperature and sparks on the wire harness board.

[0013] The present application also provides a wire harness board assembly, which includes a wire harness board and a fire extinguishing structure; the wire harness board is configured to be provided above the battery cell; the fire extinguishing structure is provided on the wire harness board, and there are several fire extinguishing structures. A fire extinguishing structure is located above a battery cell, and the fire extinguishing structure is configured to release a fire extinguishing material to the corresponding battery cell when heated; the fire extinguishing structure is a fire extinguishing capsule, and the fire extinguishing capsule includes a shell and a fire extinguishing material provided inside the shell, and the shell is configured to melt when heated.

[0014] The present application also provides an electrical device, including the above-mentioned battery device.

[0015] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a partial structural schematic diagram of an embodiment of the battery device of the present application;

[0018] Figure 2 It is a front view of an embodiment of the battery device of the present application;

[0019] Figure 3For Figure 2 A cross-sectional view taken along line A-A in

[0020] Figure 4 For Figure 3 An enlarged partial view at position B in

[0021] Figure 5 A side view of an embodiment of the battery device of the present application;

[0022] Figure 6 For Figure 5 A cross-sectional view taken along line C-C in

[0023] Figure 7 An exploded view of an embodiment of the battery device of the present application;

[0024] Figure 8 A schematic structural view of an embodiment of the vehicle of the present application.

[0025] Explanation of reference numerals in the drawings:

[0026]

[0027] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0028] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein 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 drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two unless otherwise specifically defined.

[0031] References to "embodiments" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment each time, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "plurality" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0033] In the description of the embodiments of the present application, technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application.

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0035] The battery device mentioned in the art is also called a battery, which can be divided into a primary battery and a rechargeable battery according to whether it can be recharged. Currently, the common types of rechargeable batteries are: lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively slightly lower, but they have a larger output and charging current, and also have a longer service life, but the cost is higher.

[0036] The battery described in the embodiments of the present application refers to a rechargeable battery. In the following, lithium-ion batteries will be mainly used as an example to describe the embodiments disclosed in the present application. It should be understood that the embodiments disclosed in the present application are applicable to any other suitable type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to a suitable device to power the device.

[0037] The battery mentioned in the embodiments disclosed in the present application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. A battery cell is the basic unit in a battery. Generally, according to the packaging method, it can be divided into: cylindrical battery cells, cuboid battery cells, and pouch battery cells. In the following, the description will mainly focus on cuboid battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or pouch battery cells in some aspects.

[0038] A battery cell includes a positive electrode tab, a negative electrode tab, an electrolyte, and a separator. A lithium-ion battery cell mainly operates by the movement of lithium ions between the positive electrode tab and the negative electrode tab. In a cylindrical battery cell, the three-layer film structure is wound into a cylindrical-shaped electrode assembly, while in a cuboid battery cell, the film structure is wound or stacked into an electrode assembly having a generally cuboid shape.

[0039] In a typical battery cell structure, a battery cell includes a housing, an electrode assembly, and an electrolyte. The electrode assembly is accommodated in the housing of the battery cell. The electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. The housing includes a housing body and an end cap. The housing body includes a receiving cavity formed by a plurality of walls and an opening. The end cap is disposed at the opening to close the receiving cavity. In addition to the electrode assembly, the receiving cavity also accommodates an electrolyte. The positive electrode tab and the negative electrode tab in the electrode assembly include tabs. In order to avoid fusing when passing a 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 tabs are electrically connected to electrode terminals located outside the battery cell through connecting members. The electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a cuboid battery cell, the electrode terminals are generally disposed at the end cap portion. A plurality of battery cells are connected in series and / or in parallel via the electrode terminals for various applications.

[0040] In some high-power application scenarios such as electric vehicles, the application of the battery includes three levels: battery cells, battery modules, and batteries. A battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame to protect the battery cells from external impacts, heat, vibrations, etc. A battery refers to the final state of the battery system installed in an electric vehicle. A battery generally includes a battery box for encapsulating one or more battery cells.

[0041] In recent years, new energy vehicles have witnessed a leapfrog development. In the field of electric vehicles, the power battery, as the power source of the electric vehicle, plays an irreplaceable and important role. The battery is composed of a battery box body and a plurality of battery cells accommodated in the battery box body. Among them, the battery, as a core component of new energy vehicles, has relatively high requirements in terms of safety. Currently, the mechanical safety during the use of power batteries is one of the battery safety issues that consumers generally concern about.

[0042] The battery provided by the embodiments of the present application can be the power source of an electrical device. The electrical device can be a mobile phone, a portable device, a laptop computer, a battery car, an electric vehicle, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spaceship, etc. The electric toy includes a fixed or mobile electric toy. For example, a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool. For example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, and a power planer.

[0043] For the convenience of description in the following embodiments, a vehicle 1000 of an embodiment of the present application is taken as an example for illustration.

[0044] For example, Figure 8 is a schematic structural diagram of a vehicle 1000 of an embodiment of the present application. The vehicle 1000 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 battery device 100, a controller 200, and a motor 300 can be arranged inside the vehicle 1000. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be arranged at the bottom, the front end, or the rear end of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000 and be used for the circuit system of the vehicle 1000, such as for the working power requirements during the start, navigation, and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000 but also be used as the driving power source of the vehicle 1000 to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0045] For example, please refer to Figure 7 , Figure 7Exploded view of the structure of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a battery box 10 and battery cells 20, and the battery box 10 has an accommodation space for accommodating the battery cells 20. Among them, the battery box 10 can adopt various structures. In some embodiments, the battery box 10 may include a first part 10a and a second part 10b, the first part 10a and the second part 10b cover each other, and the first part 10a and the second part 10b jointly define an accommodation space for accommodating the battery cells 20. The second part 10b may be a hollow structure with one end open, and the first part 10a may be a plate-like structure. The first part 10a covers the open side of the second part 10b so that the first part 10a and the second part 10b jointly define the accommodation space; the first part 10a and the second part 10b may also both be hollow structures with one side open, and the open side of the first part 10a covers the open side of the second part 10b. Of course, the battery box 11 formed by the first part 10a and the second part 10b can be of various shapes, such as a cylinder, a cuboid, etc.

[0046] In the battery device 100, there may be one or multiple battery cells 20. When the battery device 100 has multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the battery box 10; of course, the battery device 100 can also be that multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection to form a battery module form, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the battery box 10.

[0047] CCS (Cell Connection System) is also known as the battery connection system. It provides functions such as temperature sampling of the battery and voltage sampling of the battery cells and realizes high-voltage series and parallel connections between the battery cells. It provides temperature and voltage signals to the battery pack BMS through sampling lines or FPC (flexible printed circuit boards) and connector components. The FPC type sampling line can also provide a fuse function to reduce losses caused by excessive current. The BMS realizes monitoring / control of the charging and discharging operation states of the battery cells, modules, and battery packs through the CCS.

[0048] As an important part of the battery, the wire harness board in the CCS is used to achieve electrical isolation from the battery cells and wire harness fixation. However, the CCS in the related art has no active targeted fire prevention / extinguishing function. When the battery cells are in a thermal runaway state and release continuous high temperature and sparks, thermal diffusion will occur. Since the wire harness board usually uses a plastic board, it will cause the large-area melting or ignition of the plastic wire harness board, damaging the circuits on the wire harness board.

[0049] Based on the above problems, the present application proposes a battery device 100, aiming to solve the problem that when the battery cell 20 is in a thermal runaway state, it causes large-area melting or ignition of the plastic wire harness board 31, thereby damaging the circuits on the wire harness board 31. The following will be described in detail with specific drawings and embodiments.

[0050] Please refer to Figures 1 to 6 , in an embodiment of the present application, the battery device 100 includes a battery box 10, a plurality of battery cells 20 disposed in the battery box 10, and a wire harness board assembly 30. The wire harness board assembly 30 includes a wire harness board 31 and a fire extinguishing structure 32; the wire harness board 31 is disposed above the battery cell 20; the fire extinguishing structure 32 is disposed on the wire harness board 31, and there are a plurality of fire extinguishing structures 32, at least one fire extinguishing structure 32 is located above a battery cell 20, and the fire extinguishing structure 32 is configured to release a fire extinguishing material 322 to the corresponding battery cell 20 when heated; the fire extinguishing structure 32 is a fire extinguishing capsule, and the fire extinguishing capsule includes a housing 321 and a fire extinguishing material 322 disposed inside the housing 321, and the housing 321 is configured to melt when heated.

[0051] The wire harness board 31 refers to a structure for realizing electrical isolation from the battery cell 20 and wire harness fixing. The wire harness board 31 is installed inside the battery box 10 and is disposed above the battery cell 20. The shape of the wire harness board 31 can be set according to the arrangement mode of the plurality of battery cells 20. For example, it can be a plate body with a rectangular, circular, elliptical, triangular cross-section, etc., and no specific limitation is made here. Moreover, the wire harness board 31 can be a solid plate body or a plate body with a hollow interior, and can be specifically set according to the position of the fire extinguishing structure 32.

[0052] The fire extinguishing structure 32 refers to a structure for releasing the fire extinguishing material 322 to extinguish the fire on the target object with the fire extinguishing material 322. In this embodiment, when the fire extinguishing structure 32 is heated to release the fire extinguishing material 322, the fire extinguishing material 322 can fall on the corresponding battery cell 20 under the action of gravity to extinguish the sparks generated on the battery cell 20. The fire extinguishing structure 32 can be disposed inside the wire harness board 31, or at the bottom or top of the wire harness board 31. The fire extinguishing structure 32 can be fixedly installed on the wire harness board 31 by means of bonding, clamping, screw connection, plug-in connection, etc., so that the fire extinguishing structure 32 is reliably installed on the wire harness board 31 under normal use conditions.

[0053] In actual application, one or at least two fire extinguishing structures 32 can be correspondingly arranged above each battery cell 20, which can be specifically set according to the area of the battery cell 20 and the area of the fire extinguishing structure 32. For example, when the area of the battery cell 20 is much larger than the area of the fire extinguishing structure 32, at least two fire extinguishing structures 32 can be correspondingly arranged above the battery cell 20; when the area of the battery cell 20 is equivalent to the area of the fire extinguishing structure 32, one fire extinguishing structure 32 can be correspondingly arranged above the battery cell 20.

[0054] It should be noted that the fire extinguishing structure 32 is configured to release the fire extinguishing material 322 to the corresponding battery cell 20 when heated, which means that when the fire extinguishing structure 32 is subjected to a relatively high temperature (for example, exceeding 200 °C), it can automatically release the fire extinguishing material 322 to the corresponding battery cell 20.

[0055] The fire extinguishing capsule refers to a shell-core structure similar to a capsule. The outer shell 321 of the fire extinguishing capsule is a structure that can wrap the fire extinguishing material 322 at normal temperature, and the material of the outer shell 321 can be acrylic. The fire extinguishing material 322 is a material for extinguishing the fire source. For example, fire extinguishing agents such as dry powder, perfluoromethyl hexanone, 1-bromo-1,2,2-trifluoropropene, hexafluoropropane, and heptafluoropropane are not specifically limited herein.

[0056] In summary, in the technical solution of the embodiment of the present application, the technical solution of the present application arranges the fire extinguishing structure 32 correspondingly above all the battery cells 20. When a certain battery cell 20 is in a thermal runaway state and releases high temperature and sparks, the high temperature and sparks will be transmitted to the fire extinguishing structure 32 corresponding to the battery cell 20. After being heated, the fire extinguishing structure 32 releases the fire extinguishing material 322 to the corresponding battery cell 20, which can extinguish the sparks and prevent the spread of high temperature and sparks, thereby solving the problem that when the battery cell 20 is in a thermal runaway state, it causes large-area melting or ignition of the plastic wire harness board 31 and damages the circuits on the wire harness board 31. In addition, the outer shell 321 of the fire extinguishing structure 32 can be quickly melted after being heated to break the wrapping of the outer shell 321 on the fire extinguishing material 322, so that the fire extinguishing material 322 can fall on the corresponding battery cell 20 to extinguish the fire source generated on the battery cell 20.

[0057] Please refer to Figure 3 、 Figure 6 , in an embodiment of the present application, the wire harness board 31 is provided with an inner cavity 311, and the fire extinguishing structure 32 is arranged in the inner cavity 311.

[0058] The fire extinguishing structure 32 being arranged in the inner cavity 311 of the wire harness board 31 means that the fire extinguishing structure 32 is embedded in the wire harness board 31, and in the normal use state, the fire extinguishing structure 32 will not be exposed outside the wire harness board 31.

[0059] With such a design, by arranging the fire extinguishing structure 32 in the inner cavity 311 of the wire harness board 31, it can be ensured that the fire extinguishing structure 32 will not interfere with the pole columns or other structures on the battery cell 20 under normal use conditions, so as to achieve reliable installation of the fire extinguishing structure 32. When a certain battery cell 20 is in a thermal runaway state and releases high temperature and sparks, the high temperature and sparks will first be transmitted to the area of the wire harness board 31 corresponding to the battery cell 20 and between the fire extinguishing structure 32. After the high temperature and sparks burn through the corresponding area of the wire harness board 31, they will continue to be transmitted to the fire extinguishing structure 32 corresponding to the battery cell 20. After being heated, the fire extinguishing structure 32 releases the fire extinguishing material 322 to the corresponding battery cell 20, thus extinguishing the sparks and preventing the high temperature and sparks from spreading to other positions of the wire harness board 31, and preventing the plastic wire harness board 31 from melting or catching fire on a large scale.

[0060] Please refer to Figure 3 、 Figure 4 In an embodiment of the present application, the wire harness board 31 is provided with a smoke exhaust port 312 communicating the inner cavity 311 and the outside.

[0061] The smoke exhaust port 312 refers to an opening formed on the wire harness board 31, and this opening is used to communicate the inner cavity 311 inside the wire harness board 31 and the space outside the wire harness board 31. The cross-sectional shape of the smoke exhaust port 312 can be circular, elliptical, rectangular, triangular, etc., and no specific limitation is made here. Moreover, the smoke exhaust port 312 can be formed at the bottom, top or side of the wire harness board 31.

[0062] With such a design, since when the fire extinguishing structure 32 releases the fire extinguishing material 322 upon heating, the released fire extinguishing material 322 will leave gas residues in the inner cavity 311 of the wire harness board 31, designing the smoke exhaust port 312 can exhaust the gas in the inner cavity 311 to the outside, preventing a large amount of gas from accumulating in the inner cavity 311 of the wire harness board 31 and causing the wire harness board 31 to expand and deform.

[0063] Please refer to Figure 3 、 Figure 4 In an embodiment of the present application, the wire harness board 31 is further provided with a smoke exhaust channel 313, and the smoke exhaust port 312 communicates with the outside through the smoke exhaust channel 313.

[0064] The smoke exhaust channel 313 refers to a channel formed on the wire harness board 31, and this channel is used to communicate the smoke exhaust port 312 on the wire harness board 31 and the space outside the wire harness board 31 (or outside the battery box 10). The cross-sectional shape of the smoke exhaust channel 313 can be rectangular, wavy, serrated, etc., and no specific limitation is made here. Moreover, the smoke exhaust channel 313 can also be formed at the bottom, top or side of the wire harness board 31.

[0065] With such a design, after the gas in the inner cavity 311 of the wiring harness board 31 is discharged from the smoke exhaust port 312, it can be guided through the smoke exhaust channel 313 to smoothly discharge the gas to the outside, preventing the gas from accumulating inside the battery box 10.

[0066] Please refer to Figure 3 、 Figure 4 In an embodiment of the present application, the wiring harness board 31 has a length direction, and the smoke exhaust channel 313 extends along the length direction of the wiring harness board 31 and penetrates through opposite sides of the wiring harness board 31.

[0067] The length direction of the wiring harness board 31 refers to the direction of the larger dimension of the wiring harness board 31 itself, and the length direction of the wiring harness board 31 is the same as the direction in which the largest number of battery cells 20 are arranged.

[0068] With such a design, the gas flowing out from the smoke exhaust port 312 can flow into the smoke exhaust channel 313, and then the gas is guided to both sides of the wiring harness board 31 through the smoke exhaust channel 313, enabling the gas to be discharged to the outside more quickly.

[0069] Please refer to Figure 3 、 Figure 4 In an embodiment of the present application, both the smoke exhaust port 312 and the smoke exhaust channel 313 are provided on the side of the wiring harness board 31 close to the battery cell 20.

[0070] With such a design, not only can the gas inside the wiring harness board 31 flow from the smoke exhaust port 312 to the smoke exhaust channel 313 and then be smoothly guided to the outside under the guidance of the smoke exhaust channel 313, but also the gas generated after the fire extinguishing material 322 is released to the corresponding battery cell 20 can be smoothly guided to the outside under the guidance of the smoke exhaust channel 313.

[0071] In another embodiment of the present application, part of the fire extinguishing structure 32 protrudes from the bottom of the wiring harness board 31; alternatively, the fire extinguishing structure 32 is provided at the bottom of the wiring harness board 31.

[0072] That part of the fire extinguishing structure 32 protrudes from the bottom of the wiring harness board 31 means that the upper half of the fire extinguishing structure 32 is accommodated in the inner cavity 311 of the wiring harness board 31, and the lower half of the wiring harness board 31 protrudes on the side of the wiring harness board 31 close to the battery cell 20, that is, part of the fire extinguishing structure 32 is exposed at the bottom of the wiring harness board 31.

[0073] The fire extinguishing structure 32 is provided at the bottom of the wiring harness board 31 means that the fire extinguishing structure 32 is directly installed on the side of the wiring harness board 31 close to the battery cell 20, that is, the entire fire extinguishing structure 32 is exposed at the bottom of the wiring harness board 31.

[0074] With such a design, the fire extinguishing structure 32 can be at least partially located at the bottom of the wire harness board 31. When a certain battery cell 20 is in a thermal runaway state and releases high temperature and sparks, the high temperature and sparks will be directly transmitted to the fire extinguishing structure 32 corresponding to the battery cell 20. After being heated, the fire extinguishing structure 32 releases the fire extinguishing material 322 to the corresponding battery cell 20, thus extinguishing the sparks, which can improve the fire extinguishing speed and reduce the influence of high temperature and sparks on the wire harness board 31.

[0075] Please refer to Figures 1 to 6 , the present application also provides a wire harness board assembly 30, which includes a wire harness board 31 and a fire extinguishing structure 32; the wire harness board 31 is configured to be disposed above the battery cell 20; the fire extinguishing structure 32 is disposed on the wire harness board 31, and there are several fire extinguishing structures 32. One fire extinguishing structure 32 is located above one battery cell 20, and the fire extinguishing structure 32 is configured to release the fire extinguishing material 322 to the corresponding battery cell 20 when heated; the fire extinguishing structure 32 is a fire extinguishing capsule, which includes a housing 321 and a fire extinguishing material 322 disposed inside the housing 321, and the housing 321 is configured to melt when heated.

[0076] According to some embodiments of the present application, the present application provides a battery device 100 including a wire harness board assembly 30. Please refer to Figures 1 to 6 , the battery device 100 further includes a battery box 10 and several battery cells 20 disposed inside the battery box 10; the wire harness board assembly 30 includes a wire harness board 31 and fire extinguishing capsules; the wire harness board 31 is disposed above the battery cells 20; the fire extinguishing capsules are disposed inside the inner cavity 311 of the wire harness board 31, and there are several fire extinguishing structures 32. At least one fire extinguishing structure 32 is located above one battery cell 20, and the fire extinguishing capsules are configured to release the fire extinguishing material 322 to the corresponding battery cells 20 when heated. The wire harness board 31 is provided with a smoke exhaust port 312 communicating the inner cavity 311 with the outside, and the wire harness board 31 is also provided with a smoke exhaust channel 313, and the smoke exhaust port 312 communicates with the outside through the smoke exhaust channel 313.

[0077] In the technical solution of the embodiment of the present application, the technical solution of the present application is to provide a fire extinguishing capsule above all battery cells 20. When a battery cell 20 is in a thermal runaway state and releases high temperature and sparks, the high temperature and sparks will first be transmitted to the area between the battery cell 20 and the fire extinguishing structure 32 of the wiring harness plate 31. When the high temperature and sparks burn through the area corresponding to the wiring harness plate 31, they will continue to be transmitted to the fire extinguishing structure 32 corresponding to the battery cell 20. After being heated, the fire extinguishing structure 32 releases the fire extinguishing material 322 to the corresponding battery cell 20, thereby extinguishing the sparks and preventing the high temperature and sparks from spreading to other positions of the wiring harness plate 31, thereby solving the problem of large-scale melting or fire of the plastic wiring harness plate 31 and damaging the circuit on the wiring harness plate 31 in the thermal runaway state of the battery cell 20. In addition, since the fire extinguishing structure 32 releases the fire extinguishing material 322 when heated, the released fire extinguishing material 322 will leave gas in the inner cavity 311 of the wiring harness plate 31. After the gas in the inner cavity 311 of the wiring harness plate 31 is discharged from the smoke exhaust port 312, it can be guided through the smoke exhaust channel 313 to smoothly discharge the gas to the outside, thereby preventing a large amount of gas from accumulating in the inner cavity 311 of the wiring harness plate 31, causing the wiring harness plate 31 to expand and deform.

[0078] The present application also proposes an electrical device, which includes a battery device 100. The specific structure of the battery device 100 refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0079] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: The invention comprises a battery box, a plurality of battery cells arranged in the battery box, and a wiring harness plate assembly, wherein the wiring harness plate assembly comprises: A wiring harness plate, arranged above the battery cell; A fire extinguishing structure is provided on the wiring harness plate, and a plurality of the fire extinguishing structures are provided, at least one of the fire extinguishing structures is located above one of the battery cells, and the fire extinguishing structure is configured to release a fire extinguishing material to the corresponding battery cell when heated; the fire extinguishing structure is a fire extinguishing capsule, and the fire extinguishing capsule includes an outer shell and a fire extinguishing material provided inside the outer shell, and the outer shell is configured to melt when heated; The wiring harness plate is provided with an inner cavity, and the fire extinguishing structure is arranged in the inner cavity; the wiring harness plate is provided with a smoke exhaust port communicating with the inner cavity and the outside.

2. The battery device according to claim 1, characterized in that The wiring harness plate is also provided with a smoke exhaust passage, and the smoke exhaust port is connected to the outside through the smoke exhaust passage.

3. The battery device according to claim 2, characterized in that: The wiring harness plate has a length direction, and the smoke exhaust passage extends along the length direction of the wiring harness plate and penetrates to two opposite sides of the wiring harness plate.

4. The battery device according to claim 2, characterized in that: The smoke exhaust port and the smoke exhaust channel are both arranged on a side of the wiring harness plate close to the battery cell.

5. A wiring harness plate assembly, characterized in that: include: A wiring harness plate is configured to be disposed above the battery cell; A fire extinguishing structure is provided on the wiring harness plate, and a plurality of the fire extinguishing structures are provided, one of the fire extinguishing structures is located above one of the battery cells, and the fire extinguishing structure is configured to release a fire extinguishing material to the corresponding battery cell when heated; the fire extinguishing structure is a fire extinguishing capsule, and the fire extinguishing capsule includes an outer shell and a fire extinguishing material provided inside the outer shell, and the outer shell is configured to melt when heated; The wiring harness plate is provided with an inner cavity, and the fire extinguishing structure is arranged in the inner cavity; the wiring harness plate is provided with a smoke exhaust port communicating with the inner cavity and the outside.

6. An electrical equipment, characterized in that: A battery device comprising the battery device as claimed in any one of claims 1 to 4.

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