FFC components and battery packs

Abstract

The present invention relates to the technical field of new energy batteries, and discloses an FFC component and a battery pack. The orthographic projection of the protective member on the large surface of the wiring harness body covers the insurance area to protect the insurance area. When the load current is too large and the insurance part of the FFC component is blown, the generated sparks and melting splashes will be blocked by the protective member, so that the sparks and melting splashes will not splash outward, thereby improving the safety of battery use. The FFC component of the present invention includes: a wiring harness body, a insurance area and a protective member. At least two wires are arranged inside the wiring harness body. The wires are used to collect the temperature and / or voltage of the battery. Each wire is provided with at least one insurance part, and at least two insurance parts are arranged in the same insurance area. The protective member is arranged on the large surface of the wiring harness body. The orthographic projection of the protective member on the large surface of the wiring harness body covers the insurance area. The protective member includes a protective frame and a protective plate. The protective frame and the protective plate are enclosed to form a closed insurance area.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to an FFC component and a battery pack. Background Art

[0002] With the continuous development of new energy technology, 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, wind and solar power stations, as well as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, aerospace and many other technical fields.

[0003] FFC (Flexible Flat Cable, FFC for short) is a new type of data cable made of insulating material and extremely thin tinned flat copper wire, which is pressed together through an automated equipment production line. FFC has the advantages of being soft, bendable and foldable, thin, small, simple to connect, easy to disassemble, and easy to solve electromagnetic shielding. It is a commonly used data cable in new energy batteries. In order to ensure the safety of the line, a punching fuse needs to be set on the FFC. The punching fuse is formed through an etching process. Compared with the FFC punching fuse that can be fused, the FFC fuse is formed in a different way. When the load current is too large and the FFC punching fuse is blown, sparks and melting splashes will be generated. When the battery cell leaks or sprays, it is easy to catch fire and burn, posing a safety hazard. Summary of the invention

[0004] In view of this, the present invention provides an FFC assembly and a battery pack to solve the problem that the existing FFC is prone to fire and poses a safety hazard when the fuse is cut and blown.

[0005] In a first aspect, the present invention provides an FFC assembly, comprising:

[0006] A wiring harness body, in which at least two wires are arranged, the wires are used to collect the temperature and / or voltage of the battery, and each of the wires is provided with at least one insurance part;

[0007] An insurance area, wherein at least two of the insurance parts are arranged in the same insurance area;

[0008] A protective member is arranged on a large surface of the wiring harness body, and an orthographic projection of the protective member on the large surface of the wiring harness body covers the insurance area;

[0009] The protective member 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.

[0010] Beneficial effect: The FFC component of the present invention is provided with a protective member on the large surface of the wiring harness body, and the large surface of the wiring harness body can be the side of the wiring harness body away from the battery, or the side of the wiring harness body close to the battery. The protective member covers the insurance area in the positive projection of the large surface of the wiring harness body, that is, the protective member cover is arranged on the insurance area to protect the insurance area. When the load current is too large and the insurance part of the FFC component is blown, the generated sparks and melting splashes will be blocked by the protective member, so that the sparks and melting splashes will not splash outward and will not contact the battery electrolyte, which significantly reduces the risk of combustion and improves the safety of battery use; and the protective member includes a protective frame and a protective plate, the protective frame has a certain thickness, and the protective frame and the protective plate are enclosed to form a closed space, the insurance part of the insurance area is located in the closed space, and the protective plate can effectively block the sparks and melting splashes generated when the insurance part is blown, and the sparks and melting splashes will not spread outward from the closed space, thereby improving the reliability of the protective member and further improving the safety performance of the battery.

[0011] In a second aspect, the present invention also includes a battery pack, including a box body and the FFC assembly as described above, wherein the box body includes a bottom plate and a frame, wherein the frame is arranged at the edge of the bottom plate and forms a receiving space, and the FFC assembly is arranged in the receiving space.

[0012] Because the battery device of the present invention includes the FFC assembly of the present invention and has the same beneficial effects as the FFC assembly, they will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a front view of the FFC assembly of the present invention;

[0015] Figure 2 It is a three-dimensional schematic diagram of the FFC component of the present invention;

[0016] Figure 3 It is an exploded schematic diagram of the FFC assembly of the present invention;

[0017] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0018] Figure 5 It is a schematic diagram of the battery pack of the present invention (partial structure omitted).

[0019] Description of reference numerals:

[0020] 1. Wire harness body;

[0021] 2. Insurance area;

[0022] 3. Protective element; 301. Protective frame; 302. Protective plate;

[0023] 4. Box body; 401. Bottom plate; 402. Frame;

[0024] 5. Battery pack. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] Combine the following Figures 1 to 5 , describing embodiments of the FFC assembly and battery pack of the present invention.

[0027] According to an embodiment of the present invention, on the one hand, an FFC component is provided, including: a wiring harness body 1, a safety area 2 and a protective member 3, at least two wires are arranged inside the wiring harness body 1, the wires are used to collect the temperature and / or voltage of the battery, each wire is provided with at least one safety part, at least two safety parts are arranged in the same safety area 2, the protective member 3 is arranged 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 area 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 facing away from the battery, the protective plate 302 is connected to the side of the protective frame 301 facing away from the wiring harness body 1, and the protective frame 301 and the protective plate 302 together form a closed safety area 2.

[0028] In this FFC component, a protective member 3 is provided on the large surface of the wiring harness body 1. The large surface of the wiring harness body 1 can be the side of the wiring harness body 1 away from the battery or the side of the wiring harness body 1 close to the battery. The protective member 3 covers the insurance area 2 in the positive projection of the large surface of the wiring harness body 1, that is, the protective member 3 is covered on the insurance area 2 to protect the insurance area 2. When the load current is too large and the insurance part of the FFC component is blown, the generated sparks and melting splashes will be blocked by the protective member 3, so that the sparks and melting splashes will not splash outward and will not contact the battery electrolyte, which significantly reduces the risk of combustion and improves the safety of battery use.

[0029] like Figure 1-Figure 3 As shown, the harness body 1 is the main output harness of the FFC assembly. The harness body 1 has a certain length. At least two wires are arranged inside the harness body 1. For example, two wires, three wires, six wires, etc. can be arranged inside the harness body 1. The specific number of wires is selected and set according to the line transmission needs. The harness body 1 is mainly used to collect information such as the temperature and / or voltage of each battery. Usually, each wire is electrically connected to the battery to realize the collection and transmission of battery information.

[0030] In order to ensure the safety of the line, a fuse is provided on each wire of the wiring harness body 1. The fuse can protect the battery pack by fusing. Specifically, the wire diameter or melting point of the wire at the fuse is smaller than the wire diameter or melting point of the wire at the non-fuse area. When the current is too large, the fuse will first fuse to protect the safety of the battery pack, avoiding safety hazards such as abnormal thermal runaway of the battery in the battery pack caused by excessive heat generation.

[0031] According to the length of the wire, each wire is provided with at least one insurance part, for example, one, two, three insurance parts, etc. can be provided on each wire. There are many structural forms of the insurance part, which are not limited in this embodiment. For example, the insurance part can be a punching fuse. When the load current is too large, the insurance part of the wire will fuse to form a reliable protection for the entire circuit of the battery pack.

[0032] In this embodiment, at least two insurance parts are arranged in the same insurance area 2, for example, two insurance parts, three insurance parts, five insurance parts, etc. can be arranged in the same insurance area 2, and the insurance parts arranged in the same insurance area 2 can be insurance parts on the same wire or insurance parts on multiple wires. Usually, insurance parts that are close to each other can be arranged in the same insurance area 2, that is, in this embodiment, the insurance parts of each wire of the wiring harness body 1 are relatively concentrated, so as to facilitate the subsequent arrangement of the protective member 3.

[0033] The wire harness body 1 is a flat wiring structure as a whole, one side of the wire harness body 1 faces (is close to) the battery to facilitate electrical connection with the battery, and the other side of the wire harness body 1 faces away from the battery. The side of the wire harness body 1 facing away from the battery and the side close to the battery are both large surfaces of the wire harness body 1. The protective member 3 is arranged on the large surface of the wire harness body 1.

[0034] The orthographic projection of the protective member 3 on the large surface of the harness body 1 covers the insurance area 2. Specifically, the protective member 3 is covered on the insurance area 2, that is, the orthographic projection of the protective member 3 on the large surface of the harness body 1 fully covers the insurance area 2, so that all insurance parts in the insurance area 2 are covered by the orthographic projection of the protective member 3 on the large surface of the harness body 1. When the load current is too large and the insurance part of the FFC component is blown, the insurance part will generate sparks and melting splashes. When these sparks and melting splashes splash outward, they will be blocked by the protective member 3 and cannot continue to splash outward. Even if the battery cell leaks or sprays liquid, these sparks and melting splashes will not contact the battery electrolyte, thereby reducing the risk of combustion and improving the safety performance of the battery.

[0035] There is no limit to the number of protective elements 3 that can be set, and they can be set according to the number of insurance areas 2. For example, when all insurance parts are set in the same insurance area 2, and the number of insurance areas 2 is one, only one protective element 3 is required. If the insurance parts are distributed in two or more insurance areas 2, the number of protective elements 3 matches the number of insurance areas 2.

[0036] Furthermore, in the extending direction of the wire harness body 1 , the length range of the setting area of ​​the insurance portion is 5 mm to 10 mm.

[0037] It is understandable that when the FFC assembly is set, the harness body 1 may be bent, so the extension direction of the harness body 1 may not be a straight line. Each wire of the harness body 1 is provided with a safety part, and the number of safety parts set on each wire may be the same or different. However, all the safety parts are set within a certain area, that is, all the safety parts are set in a certain setting area, and one or more safety areas 2 may be set in the setting area.

[0038] If the length of the insurance part setting area is too long, the insurance part setting positions are too dispersed, which is not conducive to the setting of the protective element 3, and the purpose of effectively blocking sparks and melting splashes cannot be achieved. If too many protective elements 3 are set, too much setting space will be occupied, which is not conducive to the structural layout. If the length of the insurance part setting area is too short, the insurance parts are too concentrated, which will lose the effect of setting multiple insurance parts and is not conducive to the fuse protection of the wire.

[0039] In this embodiment, the length of the setting area is 5mm to 10mm in the extension direction of the wiring harness body 1. The length of the setting area of ​​the insurance part is within the above range, and the setting of the insurance part will not be too dispersed or too concentrated, which can effectively protect the wires of the wiring harness body 1, the insurance part can be reliably melted when the load current is too large, and it can also effectively block sparks and melting spatters, which is convenient for structural layout.

[0040] For example, in the extending direction of the wire harness main body 1 , the length of the arrangement region of the insurance portion may be 5 mm, 6.5 mm, 8 mm, 10 mm, etc.

[0041] Furthermore, the length of the protective member 3 along the extension direction of the wire harness body 1 ranges from 10 mm to 50 mm.

[0042] The protective member 3 has a certain length along the extension direction of the wiring harness body 1. If the protective member 3 is too long in the extension direction of the wiring harness body 1, the protective member 3 is too large, which will occupy a large setting space and is not conducive to structural setting. If the protective member 3 is too short, it is difficult to cover the insurance area 2, and the blocking effect on sparks and melting splashes is not good.

[0043] In this embodiment, the length of the protective member 3 along the extension direction of the wiring harness body 1 is in the range of 10 mm to 50 mm. The length of the protective member 3 along the extension direction of the wiring harness body 1 is within the above range, so that the size of the protective member 3 is not too large or too small, and does not occupy too much space in the battery pack, which is beneficial to the structural layout, and can fully cover the insurance area 2, ensuring the blocking effect of sparks and melting splashes, and ensuring the protective effect of the protective member 3.

[0044] For example, the length of the protection member 3 along the extending direction of the wire harness body 1 may be 10 mm, 22 mm, 34 mm, 40 mm, 50 mm, etc.

[0045] Furthermore, at least two insurance parts are arranged to at least partially overlap along the projection in the first direction, the first direction is perpendicular to the extension direction of the wiring harness body 1 and parallel to the large surface of the wiring harness body 1, and the length range of the protective member 3 along the extension direction of the wiring harness body 1 is 15mm~50mm.

[0046] In the insurance area 2, the first direction refers to a direction perpendicular to the extension direction of the harness body 1 and parallel to the large surface of the harness body 1. At least two insurance parts are arranged to overlap at least partially along the projection in the first direction. The insurance parts whose projection overlaps in the first direction have a greater risk of melting and generating heat, and the heat generated is more concentrated. It is necessary to set a larger protective member 3 to achieve safe protection of the FFC component. At this time, the length range of the protective member 3 along the extension direction of the harness body 1 is 15mm~50mm to reliably protect the FFC component.

[0047] For example, at this time, the length of the protective member 3 along the extending direction of the wire harness body 1 can be 15 mm, 22 mm, 35 mm, 43 mm, 50 mm, etc.

[0048] Furthermore, the thickness of the protective member 3 ranges from 2 mm to 4 mm.

[0049] The protective member 3 has a certain thickness in the direction perpendicular to the plane where the harness body 1 is located (also in the battery height direction). If the protective member 3 is too thick in the direction perpendicular to the plane where the harness body 1 is located, the size of the protective member 3 is too large, which will occupy a large setting space, which is not conducive to structural setting and weight reduction. If the protective member 3 is too thin, the structural strength of the protective member 3 is insufficient, and the blocking effect on sparks and melting splashes is not good. Sparks and melting splashes may melt through the protective member 3, causing the protective member 3 to lose its protective effect.

[0050] In this embodiment, the thickness of the protective member 3 is in the range of 2 mm to 4 mm. The thickness of the protective member 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, which is beneficial to the structural layout. In addition, the protective member 3 has sufficient structural strength to block sparks and melting spatters, thereby improving the reliability of the structure.

[0051] For example, the thickness of the protective member 3 may be 2 mm, 2.5 mm, 3.2 mm, 3.8 mm, 4 mm, etc.

[0052] Furthermore, in the extending direction of the wire harness body 1 , the distance between the side of the protective member 3 close to the battery and the battery is in the range of 5 mm to 10 mm.

[0053] The harness body 1 has an output terminal, which is electrically connected to the battery, and the setting position of the protective member 3 should be kept at a certain distance from the battery to facilitate the connection and setting of the structure. Usually, there are multiple batteries, and the distance between the side of the protective member 3 close to the battery and the battery refers to the distance between the side of the protective member 3 close to the battery and the nearest battery.

[0054] If the distance between the side of the protective member 3 close to the battery and the battery is too far, it proves that the distance between the insurance part and the battery is too far. When the load current is too large, it is not conducive to the timely fusing of the insurance part. If the distance between the side of the protective member 3 close to the battery and the battery is too far, it is not conducive to the installation of the protective member 3 due to the limited installation space.

[0055] In this embodiment, in the extension direction of the wiring harness body 1, the distance between the side of the protective member 3 close to the battery and the battery ranges from 5mm to 10mm. When the distance between the side of the protective member 3 close to the battery and the battery is within the above range, the distance between the insurance part and the battery is suitable, which is conducive to improving the reaction speed of the insurance part. When the load current is too large, the insurance part can be blown in time, and it is also conducive to the installation and setting of the protective member 3.

[0056] For example, the distance between the side of the protective element 3 close to the battery and the battery can be 5 mm, 6 mm, 8 mm, 10 mm, etc.

[0057] Furthermore, the battery is also connected to an explosion-proof valve, and the minimum distance between the protective member 3 and the explosion-proof valve is greater than or equal to 10 mm.

[0058] The explosion-proof valve is an important safety device for batteries. It is breathable, waterproof and dustproof to avoid explosions caused by excessive internal pressure in the battery. The explosion-proof valve can be set on the top, bottom or side of the battery, and its specific location is determined according to the structural layout of the battery pack.

[0059] The protective member 3 is set at a certain distance from the explosion-proof valve. If the protective member 3 is set too close to the explosion-proof valve, sparks and melting splashes will easily affect the explosion-proof valve, causing thermal runaway or heat spread. The minimum distance between the protective member 3 and the explosion-proof valve can be set according to the internal space size of the battery pack. In this embodiment, the minimum distance between the protective member 3 and the explosion-proof valve is greater than or equal to 10mm, for example: the minimum distance between the protective member 3 and the explosion-proof valve is 10mm, 13mm, 20mm, etc. The minimum distance between the protective member 3 and the explosion-proof valve is within the above range, which can ensure that the protective member 3 and the explosion-proof valve can work normally, prevent thermal runaway and heat spread, and thus ensure the safety performance of the battery.

[0060] Furthermore, the fire-resistant temperature range of the protective element 3 is 105°C to 200°C.

[0061] The protective member 3 should have a certain fire resistance to prevent sparks and melting splashes from burning, etc. If the fire resistance temperature of the protective member 3 is too low, it cannot effectively prevent fire, and the protective function of the protective member 3 is lost. If the fire resistance temperature of the protective member 3 is too high, the manufacturing cost of the protective member 3 will increase, which is not conducive to the control of product cost.

[0062] In this embodiment, the fire-resistant temperature range of the protective member 3 is 105°C to 200°C, for example, the fire-resistant temperature of the protective member 3 is 105°C, 160°C, 195°C, 200°C, etc. The fire-resistant temperature of the protective member 3 is within the above range, which can ensure the flame retardant and protective effects of the protective member 3 and control the product cost.

[0063] Furthermore, 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 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.

[0064] like Figure 3-Figure 4As shown, the protective member 3 includes a protective frame 301 and a protective plate 302. Specifically, the protective frame 301 is a frame-type structure, and the protective frame 301 is arranged 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 many 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 by adhesive.

[0065] The protection frame 301 is a closed frame in a plane parallel to the wire harness body 1 . In this embodiment, the protection frame 301 is a circular frame. The protection frame 301 has a certain thickness, and the thickness direction of the protection frame 301 is perpendicular to the plane where the wire harness body 1 is located.

[0066] The width direction of the wire harness body 1 refers to the direction in the plane where the wire harness body 1 is located and perpendicular to its extension direction, and the width direction of the protection frame 301 is parallel to the width direction of the wire harness body 1. The width dimension of the protection frame 301 can match the width dimension of the wire harness body 1, or the width dimension of the protection frame 301 can be greater than the width of the wire harness body 1. In this embodiment, the width dimension of the protection frame 301 is greater than the width of the wire harness body 1 to ensure that the protection member 3 can fully cover the insurance area 2 and improve the reliability of the structure.

[0067] The protective plate 302 is a plate-like structure, and the protective plate 302 is connected to the side of the protective frame 301 facing away from the wire harness body 1, that is, one side of the protective frame 301 is connected to the wire harness body 1, and the other side of the protective frame 301 is connected to the protective plate 302. There are many ways to connect the protective plate 302 to the side of the protective frame 301 facing away from the wire harness body 1. In this embodiment, the protective plate 302 is bonded to the side of the protective frame 301 facing away from the wire harness body 1. Specifically, the protective plate 302 is bonded to the side of the protective frame 301 facing away from the wire harness body 1 by adhesive.

[0068] The protective frame 301 and the protective plate 302 enclose a closed space, which encloses the safety area 2 to form 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, and the distance is 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, which encloses the safety area 2 to form a closed safety area 2. The safety part of the safety area 2 is located in the closed space, and the protective plate 301 can effectively block the sparks and melting splashes generated when the safety part is melted, and the sparks and melting splashes will not spread outward from the closed space, thereby improving the reliability of the protective part 3 and further improving the safety performance of the battery.

[0069] In addition, 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 melting splashes generated when the safety part is blown will not melt or penetrate the protective plate 302, so that the protective part 3 has good durability and high reliability.

[0070] Furthermore, the thickness of the protection frame 301 is greater than or equal to 2 mm, and the thickness of the protection plate 302 is greater than or equal to 0.1 mm.

[0071] The protection frame 301 has a certain thickness. If the thickness of the protection frame 301 is too small, the distance between the protection plate 302 and the insurance area 2 will be too close, which will affect the fusing process of the insurance part. In this embodiment, the thickness of the protection frame 301 is greater than or equal to 2 mm. When the thickness of the protection frame 301 is within the above range, it will not affect the fusing process of the insurance part, and can also ensure the blocking effect of the protection member 3 on sparks and fusing splashes.

[0072] For example, the thickness of the protection frame 301 may be 2 mm, 2.5 mm, 3 mm, etc.

[0073] The protective plate 302 has a certain thickness. If the thickness of the protective plate 302 is too small, the structural strength of the protective plate 302 is insufficient, and it is easy to be melted through by sparks and melting splashes, and cannot play an effective blocking effect. 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, so that the protective plate 302 has sufficient structural strength to ensure the blocking effect on sparks and melting splashes.

[0074] For example, the thickness of the protection plate 302 may be 0.1 mm, 0.15 mm, 0.2 mm, etc.

[0075] Furthermore, the protection frame 301 is an elastic protection frame, and the protection plate 302 is a transparent protection plate.

[0076] In this embodiment, the protective frame 301 is made of elastic material, the protective frame 301 is an elastic protective frame, and the elastic modulus of the elastic protective frame is 1-100MPa. Specifically, the material of the protective frame 301 is foam or rubber, etc. This material can provide good buffering and protection for the insurance part and improve the overall structural strength. The double sides of the protective frame 301 are connected to the wire harness body 1 and the protective plate 302 respectively through adhesive.

[0077] In this embodiment, the protective plate 302 is made of a transparent material to facilitate inspection of the insurance part in the insurance area 2 after welding the FFC assembly. 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 a PI film, which is easy to obtain and has a low cost.

[0078] like Figure 5 As shown, this embodiment also provides a battery pack, including a box body 4 and the FFC assembly as described above, the box body 4 includes a bottom plate 401 and a frame 402, the frame 402 is surrounded at the edge of the bottom plate 401 and forms a receiving space, and the FFC assembly is arranged in the receiving space.

[0079] The box body 4 is a load-bearing structure of the battery pack and has a certain structural strength. The box body 4 includes a bottom plate 401 and a frame 402. The frame 402 is arranged around the edge of the bottom plate 401 to form a receiving space, and the FFC component is arranged in the receiving space. Of course, the battery pack of this embodiment also has electrical components and structures that all existing battery packs have, which will not be repeated here.

[0080] In this battery pack, the projection of the protective part 3 on the wiring harness body 1 covers the safety area 2, that is, the protective part 3 is covered on the safety area 2 to protect the safety area 2. When the load current is too large and the safety part of the FFC component is blown, the generated sparks and melting splashes will be blocked by the protective part 3, so that the sparks and melting splashes will not splash outward and will not contact the battery electrolyte, which significantly reduces the risk of combustion and improves the safety of battery use.

[0081] Furthermore, the battery pack also includes a battery group 5, the FFC component is arranged on the upper surface of the battery group 5, the upper surface of the battery group 5 is arranged parallel to the bottom plate 401, and the length range of the protective member 3 of the FFC component along the extension direction of the wiring harness body 1 is 12mm~50mm.

[0082] A battery pack 5 is also provided inside the battery pack, that is, the battery pack 5 is provided in the accommodating space, and the FFC component is provided on the upper surface of the battery pack 5. The FFC component is provided closer to the passenger compartment, which increases the safety risk of the battery pack. In this embodiment, the overall safety of the battery pack can be ensured by adjusting the size of the protective member 3 so that the length of the protective member 3 along the extension direction of the wiring harness body 1 is 12 mm to 50 mm.

[0083] For example, the length of the protective member 3 of the FFC assembly along the extension direction of the wiring harness body 1 can be 12 mm, 20 mm, 32 mm, 46 mm, 50 mm, etc., to facilitate the connection between the internal wires of the wiring harness body 1 and the batteries of the battery pack 5.

[0084] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An FFC component, characterized in that: include: A wiring harness body (1) having at least two wires disposed therein, the wires being used to collect the temperature and / or voltage of the battery, and each of the wires being provided with at least one fuse; A safety area (2), wherein at least two of the safety parts are arranged in the same safety area (2); A protective member (3) is arranged on a large surface of the wiring harness body (1), and an orthographic projection of the protective member (3) on the large surface of the wiring harness body (1) covers the safety area (2); The protective member (3) comprises a protective frame (301) and a protective plate (302); the protective frame (301) is connected to a side of the wiring harness body (1) facing away from the battery; the protective plate (302) is connected to a side of the protective frame (301) facing away from the wiring harness body (1); the protective frame (301) and the protective plate (302) together enclose the closed safety area (2).

2. The FFC assembly according to claim 1, characterized in that: In the extension direction of the wire harness body (1), the length range of the setting area of ​​the insurance portion is 5 mm to 10 mm.

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

4. The FFC assembly according to claim 3, characterized in that: At least two of the insurance parts are arranged so that their projections along a first direction at least partially overlap, the first direction is perpendicular to the extension direction of the wiring harness body (1) and parallel to the large surface of the wiring harness body (1), and the length of the protective element (3) along the extension direction of the wiring harness body (1) ranges from 15 mm to 50 mm.

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

6. The FFC assembly according to claim 1, characterized in that: In the extension direction of the wiring harness body (1), the distance between the side edge of the protective element (3) close to the battery and the battery is in the range of 5 mm to 10 mm.

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

8. The FFC assembly according to claim 1, characterized in that: The fire-resistant temperature range of the protective element (3) is 105°C to 200°C.

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

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

11. A battery pack, characterized in that: The invention comprises a box body (4) and an FFC assembly according to any one of claims 1 to 10, wherein the box body comprises a bottom plate (401) and a frame (402), wherein the frame (402) is arranged at the edge of the bottom plate (401) to form a receiving space, and the FFC assembly is arranged in the receiving space.

12. The battery pack according to claim 11, characterized in that: It also comprises a battery pack (5), the FFC component being arranged on the upper surface of the battery pack (5), the upper surface of the battery pack (5) being arranged parallel to the bottom plate (401), and the length of the protective member (3) of the FFC component along the extension direction of the wiring harness body (1) being in the range of 12 mm to 50 mm.

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