FFC assembly and battery pack

Abstract

The present application relates to the technical field of new energy batteries, and discloses an FFC assembly and a battery pack. The orthographic projection of a protective member on a major surface of a wire harness body covers a fuse region, thereby protecting the fuse region. When a load current is excessive and fuse portions of the FFC assembly blow, the generated sparks and spatters from fuse blowing are blocked by the protective member, so that the sparks, spatters from fuse blowing, etc. do not splash outward, thereby improving the safety of battery usage. The FFC assembly in the present application comprises: the wire harness body, the fuse region, and the protective member. At least two wires are provided inside the wire harness body, the wires are used for collecting the temperature and / or voltage of a battery, each wire is provided with at least one fuse portion, and at least two fuse portions are arranged in the same fuse region; and the protective member is arranged on the major surface of the wire harness body, the orthographic projection of the protective member on the major surface of the wire harness body covers the fuse region, the protective member comprises a protective frame and a protective plate, and the protective frame and the protective plate define a closed fuse region.

Description

FFC components and battery packs

[0001] This application claims priority to Chinese Patent Application No. 2024115883699, filed on November 8, 2024, entitled "FFC Component and Battery Pack", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of new energy battery technology, specifically to an FFC module and battery pack. Background Technology

[0003] With the continuous development of new energy technologies, new energy batteries, as an environmentally friendly energy storage and release device, have been widely used in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, as well as in many technical fields such as power tools, electric bicycles, electric motorcycles, electric cars, military equipment, and aerospace.

[0004] FFC (Flexible Flat Cable) is a new type of data cable made of insulating material and extremely thin tinned flat copper wire, pressed together on an automated production line. FFC offers advantages such as flexibility, bendability, thinness, small size, simple connection, easy disassembly, and easy electromagnetic shielding, making it a commonly used data cable in new energy batteries. To ensure circuit safety, FFC requires a punched fuse, formed through an etching process. Unlike conventional punched fuses that can melt, FFC fuses are formed differently. When the load current is too high and the FFC's punched fuse melts, sparks and molten material can easily ignite and burn if the battery cell leaks or sprays liquid, posing a safety hazard. Summary of the Invention

[0005] In view of this, this application provides an FFC component and battery pack to solve the problem that existing FFCs are prone to catching fire and posing safety hazards when the stamping fuse blows.

[0006] In a first aspect, this application provides an FFC component, including:

[0007] The wiring harness body has at least two wires inside, which are used to collect the temperature and / or voltage of the battery, and each wire is provided with at least one fuse.

[0008] The insurance area, wherein at least two of the insurance departments are located within the same insurance area;

[0009] A protective element is disposed on the large surface of the wire harness body, and the orthographic projection of the protective element on the large surface of the wire harness body covers the safety area;

[0010] The protective component includes a protective frame and a protective plate. The protective frame is connected to the side of the wiring harness body facing away from the battery, and the protective plate is connected to the side of the protective frame facing away from the wiring harness body. The protective frame and the protective plate together form a closed safety area.

[0011] Beneficial Effects: The FFC assembly of this application has a protective component on the large surface of the wire harness body. This large surface can be the side of the wire harness body facing away from the battery or the side closer to the battery. The protective component's projection onto the large surface of the wire harness body covers the fuse area, meaning it covers the fuse area to protect it. When the load current is too high and the fuse of the FFC assembly blows, the resulting sparks and molten metal spatter will be blocked by the protective component, preventing them from splashing outwards or contacting the battery electrolyte. This significantly reduces the risk of combustion and improves battery safety. Furthermore, the protective component includes a protective frame and a protective plate. The protective frame has a certain thickness, and the frame and plate together form a closed space. The fuse in the fuse area is located within this closed space. The protective plate effectively blocks the sparks and molten metal spatter generated when the fuse blows, preventing them from spreading outwards from the closed space. This further improves the reliability of the protective component and enhances battery safety.

[0012] Secondly, this application also includes a battery pack, including a housing and an FFC component as described above. The housing includes a base plate and a frame, the frame surrounding the edge of the base plate and forming a receiving space, and the FFC component is disposed within the receiving space.

[0013] Since the battery device of this application includes the FFC component of this application and has the same beneficial effects as the FFC component, it will not be described in detail here. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 is a front view of the FFC component of this application;

[0016] Figure 2 is a three-dimensional schematic diagram of the FFC component of this application;

[0017] Figure 3 is an exploded view of the FFC components of this application;

[0018] Figure 4 is an enlarged schematic diagram of part A in Figure 3;

[0019] Figure 5 is a schematic diagram of the battery pack of this application (partial structure omitted).

[0020] Explanation of reference numerals in the attached diagram: 1. Wiring harness body; 2. Safety area; 3. Protective component; 301. Protective frame; 302. Protective plate; 4. Housing; 401. Base plate; 402. Frame; 5. Battery pack. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The embodiments of the FFC component and battery pack of this application are described below with reference to Figures 1 to 5.

[0023] According to an embodiment of this application, in one aspect, an FFC component is provided, including: a wiring harness body 1, a safety zone 2, and a protective member 3. The wiring harness body 1 has at least two wires disposed inside, which are used to collect the temperature and / or voltage of the battery. Each wire is provided with at least one safety part, and at least two safety parts are disposed in the same safety zone 2. The protective member 3 is disposed on the large surface of the wiring harness body 1, and the orthographic projection of the protective member 3 on the large surface of the wiring harness body 1 covers the safety zone 2. The protective member 3 includes a protective frame 301 and a protective plate 302. The protective frame 301 is connected to the side of the wiring harness body 1 opposite to the battery, and the protective plate 302 is connected to the side of the protective frame 301 opposite to the wiring harness body 1. The protective frame 301 and the protective plate 302 together form a closed safety zone 2.

[0024] This type of FFC assembly has a protective element 3 on the large surface of the wire harness body 1. The large surface of the wire harness body 1 can be the side facing away from the battery or the side facing towards the battery. The protective element 3, projected onto the large surface of the wire harness body 1, covers the fuse area 2, i.e., the protective element 3 covers the fuse area 2 to protect it. When the load current is too high and the fuse of the FFC assembly blows, the resulting sparks and molten metal spatter will be blocked by the protective element 3, preventing them from splashing outwards or coming into contact with the battery electrolyte. This significantly reduces the risk of combustion and improves the safety of battery use.

[0025] As shown in Figures 1-3, the main body 1 of the wiring harness is the main output wiring harness of the FFC component. The main body 1 has a certain length and contains at least two wires. For example, two, three, or six wires can be installed inside the main body 1, and the specific number of wires is selected according to the transmission requirements of the line. The main body 1 is mainly used to collect information such as temperature and / or voltage of each battery. Typically, each wire is electrically connected to the battery to realize the collection and transmission of battery information.

[0026] To ensure circuit safety, each conductor in the main body 1 of the wiring harness is equipped with a fuse. The fuse protects the battery pack by melting. Specifically, the wire diameter or melting point of the conductor at the fuse location is smaller than that of the conductor in the non-fuse area. When the current is too high, the fuse melts first to protect the battery pack and prevent excessive heat generation that could lead to abnormal thermal runaway or other safety hazards within the battery pack.

[0027] Depending on the length of the conductor, each conductor is equipped with at least one fuse. For example, one, two, or three fuses can be installed on each conductor. The structure of the fuse can vary, and this embodiment does not impose any limitations. For example, the fuse can be a punched fuse. When an excessive load current occurs, the fuse on the conductor will melt, providing reliable protection for the entire battery pack circuitry.

[0028] In this embodiment, at least two safety devices are disposed within the same safety area 2. For example, two, three, or five safety devices can be disposed within the same safety area 2. Furthermore, the safety devices disposed within the same safety area 2 can be on the same conductor or on multiple conductors. Typically, safety devices that are close together can be disposed within the same safety area 2. That is, in this embodiment, the safety devices of each conductor in the wire harness body 1 are relatively concentrated to facilitate the subsequent installation of the protective component 3.

[0029] The main body 1 of the wiring harness has a flat ribbon cable structure. One side of the main body 1 faces (closes to) the battery to facilitate electrical connection with the battery, while the other side of the main body 1 faces away from the battery. Both the side of the main body 1 facing away from the battery and the side facing the battery are large surfaces of the main body 1. The protective component 3 is disposed on the large surface of the main body 1.

[0030] The protective component 3, with its orthographic projection on the large surface of the wire harness body 1, covers the safety area 2. Specifically, the protective component 3 is installed on the safety area 2, meaning that the orthographic projection of the protective component 3 on the large surface of the wire harness body 1 completely covers the safety area 2, so that all fuses within the safety area 2 are covered by the orthographic projection of the protective component 3 on the large surface of the wire harness body 1. When the load current is too high and the fuse of the FFC component blows, the fuse will generate sparks and molten material. These sparks and molten material will be blocked by the protective component 3 as they fly outwards, preventing them from continuing to fly outwards. Even if the battery cell leaks or sprays liquid, these sparks and molten material will not come into contact with the battery electrolyte, thereby reducing the risk of combustion and improving the safety performance of the battery.

[0031] The number of protective components 3 is unlimited and can be set according to the number of insurance zones 2. For example, when all insurance components are set in the same insurance zone 2, the number of insurance zones 2 is one, and only one protective component 3 is needed. However, if the insurance components are distributed in two or more insurance zones 2, the number of protective components 3 matches the number of insurance zones 2.

[0032] Furthermore, in the extension direction of the main body 1, the length of the area where the safety part is installed ranges from 5mm to 10mm.

[0033] Understandably, when setting up the FFC assembly, the main body 1 of the wiring harness may be bent, so the extension direction of the main body 1 may not be a straight line. Each wire of the main body 1 is equipped with a fuse, and the number of fuses on each wire may be the same or different. However, all fuses are located within a certain area, that is, all fuses are located within a certain setting area, and one or more fuse zones 2 may be set within this setting area.

[0034] If the area where the fuse compartment is located is too long, the fuse compartments will be too dispersed, which is not conducive to the installation of protective components 3 and will fail to effectively block sparks and molten metal spatter. On the other hand, if too many protective components 3 are installed, they will occupy too much space, which is not conducive to the structural layout. If the area where the fuse compartment is located is too short, the fuse compartments will be too concentrated, which will negate the purpose of installing multiple fuse compartments and will not be conducive to the protection of the conductor from fusion.

[0035] In this embodiment, the length of the setting area in the extension direction of the wire harness body 1 ranges from 5mm to 10mm. With the length of the fuse area within this range, the fuses are neither too dispersed nor too concentrated, effectively protecting the wires of the wire harness body 1, ensuring reliable melting of the fuse when the load current is too high, and effectively preventing sparks and molten debris, thus facilitating structural layout.

[0036] For example, in the extension direction of the main body 1 of the wire harness, the length of the area where the safety part is installed can be 5mm, 6.5mm, 8mm, 10mm, etc.

[0037] Furthermore, the length of the protective component 3 along the extension direction of the main body 1 of the wire harness ranges from 10mm to 50mm.

[0038] The protective component 3 has a certain length along the extension direction of the main body 1 of the wire harness. If the length of the protective component 3 is too long along the extension direction of the main body 1 of the wire harness, the size of the protective component 3 will be too large, which will occupy a large installation space and is not conducive to the structural installation. If the length of the protective component 3 is too short, it will be difficult to cover the safety area 2, and the blocking effect on sparks and molten spatter will be poor.

[0039] In this embodiment, the length of the protective component 3 along the extension direction of the main body 1 is in the range of 10mm to 50mm. The length of the protective component 3 within this range ensures that its size is neither too large nor too small, thus avoiding excessive space occupation within the battery pack. This facilitates structural layout and ensures complete coverage of the safety area 2, guaranteeing the blocking effect against sparks and molten metal spatter, and thus guaranteeing the protective effect of the protective component 3.

[0040] For example, the length of the protective component 3 along the extension direction of the main body 1 of the wire harness can be 10mm, 22mm, 34mm, 40mm, 50mm, etc.

[0041] Furthermore, at least two safety parts are arranged to at least partially overlap along the projection of the first direction, which is perpendicular to the extension direction of the wire harness body 1 and parallel to the large surface of the wire harness body 1. The length of the protective member 3 along the extension direction of the wire harness body 1 ranges from 15mm to 50mm.

[0042] Within the safety zone 2, the first direction refers to the direction perpendicular to the extension direction of the wire harness body 1 and parallel to the large surface of the wire harness body 1. At least two safety parts are arranged with at least partial overlap along their projections in the first direction. Safety parts with overlapping projections in the first direction pose a greater risk of melting and generating heat, resulting in more concentrated heat. Therefore, a larger protective element 3 is required to achieve safe protection for the FFC assembly. In this case, the length of the protective element 3 along the extension direction of the wire harness body 1 ranges from 15mm to 50mm to reliably protect the FFC assembly.

[0043] For example, the length of the protective component 3 along the extension direction of the main body 1 of the wire harness can be 15mm, 22mm, 35mm, 43mm, 50mm, etc.

[0044] Furthermore, the thickness of the protective component 3 ranges from 2mm to 4mm.

[0045] The protective component 3 has a certain thickness in the direction perpendicular to the plane of the main body 1 of the wiring harness (also in the direction of battery height). If the thickness of the protective component 3 is too thick, its size will be too large, occupying a large installation space, which is not conducive to structural design and weight reduction. On the other hand, if the thickness of the protective component 3 is too thin, its structural strength will be insufficient, and its blocking effect against sparks and molten spatter will be poor. Sparks and molten spatter may melt through the protective component 3, causing it to lose its protective effect.

[0046] In this embodiment, the thickness of the protective component 3 is in the range of 2mm to 4mm. The thickness of the protective component 3 is within the above range, which is neither too thick nor too thin, and will not occupy too much space in the battery pack. This is beneficial to the structural layout and has sufficient structural strength to block sparks and molten spatter, thereby improving the reliability of the structure.

[0047] For example, the thickness of protective component 3 can be 2mm, 2.5mm, 3.2mm, 3.8mm, 4mm, etc.

[0048] Furthermore, in the extension direction of the main body 1 of the wire harness, the distance between the protective member 3 and the battery near the battery side is 5mm to 10mm.

[0049] The main body 1 of the wiring harness has an output end that is electrically connected to the battery. The protective component 3 should be positioned at a certain distance from the battery to facilitate the connection and installation of the structure. Typically, there are multiple batteries. The distance between the side of the protective component 3 closest to the battery and the nearest battery refers to the distance between the side of the protective component 3 closest to the battery and the nearest battery.

[0050] If the protective component 3 is too far from the battery, it means that the fuse is too far from the battery. This will make it difficult for the fuse to blow in time when the load current is too high. If the protective component 3 is too far from the battery, it will be difficult to install the protective component 3 due to the limited installation space.

[0051] In this embodiment, in the extension direction of the wire harness body 1, the distance between the protective member 3 and the battery near the battery side is 5mm to 10mm. Within this range, the distance between the protective member 3 and the battery is suitable, which improves the reaction speed of the fuse, ensuring timely fuse melting when the load current is too high, and also facilitates the installation of the protective member 3.

[0052] For example, the distance between the side of the protective component 3 near the battery and the battery can be 5mm, 6mm, 8mm, 10mm, etc.

[0053] Furthermore, the battery is also connected to an explosion-proof valve, and the minimum distance between the protective component 3 and the explosion-proof valve is greater than or equal to 10mm.

[0054] An explosion-proof valve is an important safety device for batteries. It is breathable, waterproof, and dustproof, preventing explosions caused by excessive internal pressure. The explosion-proof valve can be installed on the top, bottom, or side of the battery, with the specific location determined by the internal structural layout of the battery pack.

[0055] The protective component 3 is positioned at a certain distance from the explosion-proof valve. If the distance between the protective component 3 and the explosion-proof valve is too close, sparks and molten metal spatter can easily affect the explosion-proof valve, leading to thermal runaway or heat propagation. The minimum distance between the protective component 3 and the explosion-proof valve can be set according to the internal space dimensions of the battery pack. In this embodiment, the minimum distance between the protective component 3 and the explosion-proof valve is greater than or equal to 10mm, for example, 10mm, 13mm, 20mm, etc. A minimum distance between the protective component 3 and the explosion-proof valve within the above range ensures that both the protective component 3 and the explosion-proof valve can function normally, preventing thermal runaway and heat propagation, thereby ensuring the safety performance of the battery.

[0056] Furthermore, the fire resistance temperature range of protective component 3 is 105℃~200℃.

[0057] Protective component 3 should have a certain fire resistance to retard sparks and molten spatter, preventing combustion. If the fire resistance temperature of protective component 3 is too low, it will not effectively retard the flame and will lose its protective function. If the fire resistance temperature of protective component 3 is too high, it will increase the manufacturing cost of protective component 3, which is not conducive to product cost control.

[0058] In this embodiment, the fire resistance temperature range of the protective component 3 is 105℃~200℃, for example, the fire resistance temperature of the protective component 3 is 105℃, 160℃, 195℃, 200℃, etc. Having the fire resistance temperature of the protective component 3 within the above range ensures both its flame-retardant and protective effects while controlling product costs.

[0059] Furthermore, the protective component 3 includes a protective frame 301 and a protective plate 302. The protective frame 301 is connected to the side of the wiring harness body 1 facing away from the battery, and the protective plate 302 is connected to the side of the protective frame 301 facing away from the wiring harness body 1. The protective frame 301 and the protective plate 302 together form a closed safety area 2.

[0060] As shown in Figures 3 and 4, the protective component 3 includes a protective frame 301 and a protective plate 302. Specifically, the protective frame 301 is a frame structure and is located on the side of the wire harness body 1 facing away from the battery. The protective frame 301 is connected to the side of the wire harness body 1 facing away from the battery. There are various ways to connect the protective frame 301 to the side of the wire harness body 1 facing away from the battery. In this embodiment, the protective frame 301 is bonded to the side of the wire harness body 1 facing away from the battery. Specifically, the protective frame 301 is bonded to the side of the wire harness body 1 facing away from the battery using adhesive.

[0061] The protective frame 301 is a closed frame in a plane parallel to the main body 1 of the wire harness. In this embodiment, the protective frame 301 is a U-shaped frame. The protective frame 301 has a certain thickness, and the thickness direction of the protective frame 301 is perpendicular to the plane where the main body 1 of the wire harness is located.

[0062] The width direction of the wire harness body 1 refers to the direction perpendicular to its extension direction within the plane of the wire harness body 1. The width direction of the protective frame 301 is parallel to the width direction of the wire harness body 1. The width dimension of the protective frame 301 can match the width dimension of the wire harness body 1, or the width dimension of the protective frame 301 can be greater than the width of the wire harness body 1. In this embodiment, the width dimension of the protective frame 301 is greater than the width of the wire harness body 1 to ensure that the protective component 3 can completely cover the safety area 2, thereby improving the reliability of the structure.

[0063] The protective plate 302 is a plate-shaped structure. The protective plate 302 is connected to the side of the protective frame 301 facing away from the main body 1 of the wire harness. That is, one side of the protective frame 301 is connected to the main body 1 of the wire harness, and the other side of the protective frame 301 is connected to the protective plate 302. There are various ways to connect the protective plate 302 to the side of the protective frame 301 facing away from the main body 1 of the wire harness. In this embodiment, the protective plate 302 is adhered to the side of the protective frame 301 facing away from the main body 1 of the wire harness. Specifically, the protective plate 302 is adhered to the side of the protective frame 301 facing away from the main body 1 of the wire harness using adhesive.

[0064] The protective frame 301 and the protective plate 302 together form a closed space, which encloses the safety area 2, forming a closed safety area 2. Since the protective frame 301 has a certain thickness, after the protective plate 302 is connected to the protective frame 301, there is a certain distance between the protective plate 302 and the safety area 2, which is equal to the thickness of the protective frame 301. Therefore, after the protective plate 302 is connected to the protective frame 301, the safety area 2, the inner wall of the protective frame 301, and the side of the protective plate 302 facing the safety area 2 together constitute a closed space. This closed space encloses the safety area 2, forming a closed safety area 2. The fuse in the safety area 2 is located within this closed space. The protective plate 301 can effectively block the sparks and molten debris generated when the fuse melts. The sparks and molten debris will not spread outward from this closed space, thereby improving the reliability of the protective component 3 and further enhancing the safety performance of the battery.

[0065] Furthermore, since there is a certain distance between the protective plate 302 and the safety area 2 (the protective plate 302 and the safety area 2 are spaced apart), and the protective plate 302 has a certain thickness, the sparks and molten spatter generated when the safety part melts will not melt or melt through the protective plate 302, making the protective component 3 durable and highly reliable.

[0066] Furthermore, the thickness of the protective frame 301 is greater than or equal to 2 mm, and the thickness of the protective plate 302 is greater than or equal to 0.1 mm.

[0067] The protective frame 301 has a certain thickness. If the thickness of the protective frame 301 is too small, the distance between the protective plate 302 and the safety area 2 will be too close, which will affect the fuse breaking process. In this embodiment, the thickness of the protective frame 301 is greater than or equal to 2mm. The thickness of the protective frame 301 is within the above range, which not only does not affect the fuse breaking process, but also ensures the blocking effect of the protective component 3 on sparks and molten metal spatter.

[0068] For example, the thickness of the protective frame 301 can be 2mm, 2.5mm, 3mm, etc.

[0069] The protective plate 302 has a certain thickness. If the thickness of the protective plate 302 is too small, its structural strength will be insufficient, making it easily melted through by sparks and molten spatter, thus failing to provide effective protection. In this embodiment, the thickness of the protective plate 302 is greater than or equal to 0.1 mm. The thickness of the protective plate 302 is within the above range, ensuring that the protective plate 302 has sufficient structural strength to guarantee its effectiveness in blocking sparks and molten spatter.

[0070] For example, the thickness of the protective plate 302 can be 0.1mm, 0.15mm, 0.2mm, etc.

[0071] Furthermore, the protective frame 301 is an elastic protective frame, and the protective plate 302 is a transparent protective plate.

[0072] In this embodiment, the protective frame 301 is made of an elastic material. The protective frame 301 is an elastic protective frame with an elastic modulus of 1-100 MPa. Specifically, the material of the protective frame 301 is foam or rubber, etc. This material can provide good cushioning and protection for the safety components, improving the overall structural strength. Both sides of the protective frame 301 are connected to the wire harness body 1 and the protective plate 302 respectively via adhesive backing.

[0073] In this embodiment, the protective plate 302 is made of a transparent material to facilitate inspection of the fuse section within the fuse area 2 after the FFC assembly is soldered. Specifically, the protective plate 302 is made of PC (Polycarbonate) or PI (Polyimide) material, that is, the protective plate 302 is a PC sheet or PI film, which are readily available and inexpensive.

[0074] As shown in Figure 5, this embodiment also provides a battery pack, including a housing 4 and an FFC component as described above. The housing 4 includes a base plate 401 and a frame 402. The frame 402 surrounds the edge of the base plate 401 and forms an accommodating space. The FFC component is disposed in the accommodating space.

[0075] The housing 4 serves as the load-bearing structure for the battery pack, possessing a certain structural strength. The housing 4 includes a base plate 401 and a frame 402. The frame 402 surrounds the edge of the base plate 401 and forms a receiving space, within which the FFC assembly is housed. Of course, the battery pack in this embodiment also possesses the electrical components and structures common to existing battery packs, which will not be elaborated upon here.

[0076] In this type of battery pack, the protective component 3 covers the safety area 2 on the projection of the main body 1 of the wiring harness. That is, the protective component 3 is placed on the safety area 2 to protect the safety area 2. When the load current is too large and the fuse of the FFC component blows, the sparks and molten debris generated will be blocked by the protective component 3, so that the sparks and molten debris will not splash outward or come into contact with the battery electrolyte, which significantly reduces the risk of combustion and improves the safety of battery use.

[0077] Furthermore, the battery pack also includes a battery pack 5, with an FFC assembly disposed on the upper surface of the battery pack 5. The upper surface of the battery pack 5 is disposed parallel to the base plate 401, and the length of the protective member 3 of the FFC assembly along the extension direction of the wiring harness body 1 ranges from 12mm to 50mm.

[0078] A battery pack 5 is also installed inside the battery pack, that is, the battery pack 5 is installed in the housing space, and the FFC component is installed on the upper surface of the battery pack 5. The FFC component is installed closer to the passenger compartment, which increases the safety risk of the battery pack. However, in this embodiment, by adjusting the size of the protective component 3 and making the length of the protective component 3 along the extension direction of the wiring harness body 1 12mm to 50mm, the overall safety of the battery pack can be guaranteed.

[0079] For example, the length of the protective component 3 of the FFC assembly along the extension direction of the wiring harness body 1 can be 12mm, 20mm, 32mm, 46mm, 50mm, etc., so as to facilitate the connection between the wires inside the wiring harness body 1 and the battery of the battery pack 5.

[0080] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An FFC component, characterized in that, include: The wiring harness body (1) has at least two wires inside, which are used to collect the temperature and / or voltage of the battery, and each wire is provided with at least one fuse. Insurance area (2), at least two of the insurance departments are located within the same insurance area (2); A protective element (3) is disposed on the large surface of the wire harness body (1), and the orthographic projection of the protective element (3) on the large surface of the wire harness body (1) covers the safety area (2); The protective component (3) includes a protective frame (301) and a protective plate (302). The protective frame (301) is connected to the side of the wiring harness body (1) facing away from the battery, and the protective plate (302) is connected to the side of the protective frame (301) facing away from the wiring harness body (1). The protective frame (301) and the protective plate (302) together form a closed safety area (2).

2. The FFC component according to claim 1, characterized in that, In the extending direction of the main body (1) of the wire harness, the length of the area where the safety part is installed ranges from 5 mm to 10 mm.

3. The FFC component according to claim 1, characterized in that, The length of the protective component (3) along the extension direction of the main body of the wire harness (1) ranges from 10mm to 50mm.

4. The FFC component according to claim 3, characterized in that, At least two of the aforementioned safety parts are arranged to at least partially overlap in projection along a first direction, the first direction being perpendicular to the extension direction of the harness body (1) and parallel to the large surface of the harness body (1), and the length of the protective member (3) along the extension direction of the harness body (1) is in the range of 15mm to 50mm.

5. The FFC component according to claim 1, characterized in that, The thickness of the protective component (3) ranges from 2mm to 4mm.

6. The FFC component according to claim 1, characterized in that, In the extending direction of the main body of the wire harness (1), the distance between the protective member (3) and the battery near the side of the battery is 5mm to 10mm.

7. The FFC component according to claim 1, characterized in that, The battery is also connected to an explosion-proof valve, and the minimum distance between the protective component (3) and the explosion-proof valve is greater than or equal to 10 mm.

8. The FFC component according to claim 1, characterized in that, The fire resistance temperature range of the protective component (3) is 105℃~200℃.

9. The FFC component according to claim 1, characterized in that, The thickness of the protective frame (301) is greater than or equal to 2 mm, and the thickness of the protective plate (302) is greater than or equal to 0.1 mm.

10. The FFC component according to claim 1, characterized in that, The protective frame (301) is an elastic protective frame, and the protective plate (302) is a transparent protective plate.

11. The FFC component according to claim 1, characterized in that, The protective frame (301) is a U-shaped frame, and the thickness direction of the protective frame (301) is perpendicular to the plane where the wire harness body (1) is located.

12. The FFC component according to claim 1, characterized in that, The width of the protective frame (301) is greater than the width of the main body of the wire harness (1) to ensure that the protective component (3) can completely cover the safety area (2).

13. The FFC component according to claim 1, characterized in that, The protective plate (302) is spaced apart from the insurance area (2).

14. The FFC component according to claim 10, characterized in that, The elastic modulus of the elastic protective frame ranges from 1 to 100 MPa.

15. A battery pack, characterized in that, The device includes a housing (4) and an FFC assembly as described in any one of claims 1-10. The housing includes a base plate (401) and a frame (402). The frame (402) surrounds the edge of the base plate (401) and forms a receiving space. The FFC assembly is disposed within the receiving space.

16. The battery pack according to claim 11, characterized in that, It also includes a battery pack (5), the FFC assembly is disposed on the upper surface of the battery pack (5), the upper surface of the battery pack (5) is disposed parallel to the base plate (401), and the length of the protective member (3) of the FFC assembly along the extension direction of the main body (1) is 12mm to 50mm.

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