Flexible flat cable, ccs assembly, and battery module

Abstract

The application relates to the technical field of new energy, in particular to a flexible flat cable, a CCS assembly and a battery module. The flexible flat cable comprises a first surface and a second surface oppositely arranged in a thickness direction, a plurality of slits penetrating from the first surface to the second surface, a length edge extending along a length direction, and the slits defining signal leads; a conductor extending along the length direction; a support body made of insulating material, extending along the length direction and being separated from the conductor; an insulating film covering the conductor and the support body; and a through hole penetrating from the first surface to the second surface at the support body and avoiding the conductor.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 202410050943.9 entitled CCS Component, Battery Module and Battery Pack, the full contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of new energy technology, and in particular to a flexible flat cable, a CCS module, and a battery module. Background Technology

[0003] In the new energy battery industry, more and more manufacturers are using integrated busbars (Cells Contact System, CCS) to collect signals from battery modules, such as the voltage and / or temperature of each individual cell in the battery module.

[0004] CCS components come in various configurations, with flexible printed circuit (FPC) and ordinary wire harness being the mainstream, and a small number being flexible flat cable (FFC) structures. Among them, CCS components with FFC structures have many drawbacks that cannot be well resolved, which prevents them from being effectively promoted and used.

[0005] Patent document CN113068297A discloses a CCS assembly with an FFC structure. This assembly obtains multiple relatively independent connecting wires by making multiple cuts and flips on the cable body, thereby ensuring the overall rigidity of the FFC on the CCS assembly. However, the CCS assembly in this document has at least the following drawbacks: 1. When the width of the battery module is fixed, which leads to a limited space between the conductive bars (conductive heads), the width of a single flat cable is limited. Consequently, the number of conductors in the flat cable is limited, resulting in a smaller number of independent connecting wires and a smaller number of conductors in a single connecting wire. Therefore, it may not be suitable for large battery modules with many individual cells, nor for medium or large battery modules that require multiple signal acquisitions (such as acquiring the voltage and temperature of each individual cell).

[0006] 2. This CCS component does not take into account the issue of making way for the explosion-proof valve of a single cell in the battery module.

[0007] 3. The various connecting wires extend outwards from the outside of the flat cable by folding them over, making the connecting wires, especially the folded parts, relatively exposed and more susceptible to damage. Summary of the Invention

[0008] The purpose of this application is to solve at least one of the above-mentioned technical problems by providing a CCS component, a battery module, and a battery pack.

[0009] Firstly, this application provides a CCS component, including: Support plate; Multiple flexible flat cables are stacked on the support plate along the thickness direction. Each flexible flat cable includes a first surface and a second surface disposed opposite to each other in the thickness direction, multiple slits extending from the first surface to the second surface, and a length side extending along the length direction. The second surface faces the support plate. Each slit defines a signal lead. The signal lead is folded at the second surface and then led out from the second surface to the outside of the length side.

[0010] In some possible implementations, the flexible flat cable includes: Multiple conductors extend along the length direction and are arranged at predetermined intervals in the width direction; An insulating film is used to cover the plurality of conductors and to cover the predetermined spacing. The slit cuts through at least one of the adjacent conductors.

[0011] In some possible implementations, the cut includes: A first length segment extends along the length direction at a first spacing; The second length segment extends along the length direction at another of the first spacings; A width segment connects the end of the first length segment to the end of the second length segment and cuts off at least one adjacent conductor.

[0012] In some possible implementations, the plurality of conductors includes: The first group of conductors includes a plurality of first conductors extending along the length direction, the plurality of first conductors being arranged spaced apart from each other in the width direction by a first spacing; and, The second group of conductors includes a plurality of second conductors extending along the length direction, the plurality of second conductors being arranged apart from each other in the width direction with a second spacing, the second group of conductors being separated from the first group of conductors in the width direction with a third spacing, the third spacing being greater than the first spacing and the second spacing, and the first side, the plurality of first conductors, the plurality of second conductors and the second side being arranged sequentially along the width direction; The length side includes a first length side and a second length side arranged opposite to each other, and the plurality of cuts includes: A plurality of first slits, each first slit cutting off at least one of the adjacent first conductors and defining a first signal lead, the first signal lead being folded at the second surface and extending from the second surface to the outside of the first length side; and, Multiple second slits, each second slit cutting off at least one of the adjacent second conductors and defining a second signal lead, the second signal lead being folded at the second surface and led out from the second surface to the outside of the second length side; The flexible flat cable also includes: A plurality of supports made of nylon, the plurality of supports being covered by the insulating film at the third spacing, the plurality of supports extending along the length direction and arranged spaced apart from each other in the width direction; and, A plurality of through holes are arranged at a distance from each other along the length direction at the third spacing and extend from the first surface to the second surface.

[0013] In some possible implementations, an adhesive is provided between the signal lead and the second surface to bond the two together.

[0014] In some possible implementations, any two adjacent flexible flat cables in the thickness direction are bonded to each other.

[0015] In some possible implementations, on the outer side of the length side, the individual signal leads are arranged spaced apart from each other along the length direction.

[0016] In some possible implementations, the CCS assembly includes two cable groups, each of which includes the plurality of flexible flat cables, and the two cable groups are spaced apart from each other in the width direction by another predetermined spacing greater than the predetermined spacing. The CCS component also includes: Multiple through holes are arranged at the other predetermined interval, spaced apart from each other along the length direction.

[0017] Secondly, this application proposes a battery module, comprising: Multiple single batteries, The CCS component as described in the first aspect; The signal lead is connected to the single battery.

[0018] Thirdly, this application proposes a battery module, including: Multiple individual cells, each of which has an explosion-proof valve arranged on a first side of the battery module; The CCS component as described in the first aspect is installed on the first side; The plurality of explosion-proof valves are arranged spaced apart from each other along the length direction, and the plurality of through holes are respectively provided at the plurality of explosion-proof valves.

[0019] Fourthly, this application proposes a battery pack, comprising: Battery modules as described in the second or third aspect; Battery box, for storing the battery module; The battery management system (BMS) is connected to the plurality of flexible flat cables via electrical connectors.

[0020] The CCS assembly provided in this application includes: a support plate; a plurality of flexible flat cables stacked on the support plate along the thickness direction, the flexible flat cables including a first surface and a second surface disposed opposite to each other in the thickness direction, a plurality of slits extending from the first surface to the second surface, and a length side extending along the length direction, the second surface facing the support plate, each of the slits defining a signal lead, the signal lead being folded at the second surface and led out from the second surface to the outside of the length side. In this way, the signal leads extending from the second side of each flexible flat cable are sandwiched between two adjacent flexible flat cables or between the bottom flexible flat cable and the support plate. The flexible flat cable (body portion) shields the folded portion of the signal lead below it. On the one hand, the flexible flat cable (body portion) can protect the relatively thin signal lead and suppress the outward warping of the signal lead. On the other hand, it helps to improve the appearance of the CCS module and the subsequent battery module. Furthermore, it can easily increase the number of signal leads and second signal leads, as well as the number of conductors in a single signal lead, so that the CCS module can collect more signals from a single cell. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0022] Figure 1 This is a three-dimensional schematic diagram of a battery module provided in an embodiment of this application.

[0023] Figure 2 This is a partial structural diagram of the flexible flat cable before the first and second signal leads are folded and extended.

[0024] Figure 3 yes Figure 1 A partial structural diagram of a medium-flexible flat cable.

[0025] Figure 4 yes Figure 1 A partial structural diagram of a medium-flexible flat cable.

[0026] Figure 5 yes Figure 1A cross-sectional schematic diagram of a medium-flexible flat cable.

[0027] Figure 6 This is a top view schematic diagram of a CCS component provided in an embodiment of this application.

[0028] Figure 7 yes Figure 6 The diagram shows a partial cross-sectional view of the CCS assembly at the first flexible flat cable.

[0029] Figure 8 yes Figure 6 The diagram shows a partial cross-sectional view of the CCS assembly at the second flexible flat cable.

[0030] Explanation of reference numerals in the attached figures: F1 - Length direction, F2 - Width direction, F3 - Thickness direction; 1000-CCS module, 2000-single cell; 100 - Flexible flat cable, 100A - First side, 100B - Second side, 100C - First side, 100D - Second side, 100E - First end, 100F - Second end; 1-First conductor, 2-Second conductor, 3-Support body, 4-Insulating film, 41-Film layer; D1 - First spacing, D2 - Second spacing, D3 - Third spacing, D4 - Fourth spacing; 5-Through hole; 6-First cut, 61-First length segment, 62-Second length segment, 63-First width segment; 7-Second cut, 71-Third length segment, 72-Fourth length segment, 73-Second width segment; 8-First signal lead; 9-Second signal lead; 10-Strap; 11-First conductive busbar; 12 - Second conductive busbar; 13-Hot riveting column; 14 - First welding terminal; 15 - Second welding terminal; 16-Support plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages 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, not all, of the embodiments of this application. Based on the described 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. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0032] In the description of this application, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects, and, for example, the term "first element" itself does not imply the existence of a "second element," nor does the term "second element" itself imply the existence of a "first element." Furthermore, words such as "a" or "one" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two.

[0033] In the description of this application, the terms "comprising" or "having" indicate the presence of the said features, numbers, operations, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, elements, and / or combinations thereof.

[0034] In the description of this application, references to "one embodiment" or "some embodiments" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0035] Figures 1 to 5 A battery module according to an embodiment of this application is shown. The battery module includes a plurality of single cells 2000 and a CCS component 1000.

[0036] The CCS assembly 1000 includes a support plate 16, a flexible flat cable 100, a plurality of first conductive bars 11, and a plurality of second conductive bars 12. The flexible flat cable 100 includes: a length direction F1, a width direction F2, and a thickness direction that are perpendicular to each other; a first surface 100A and a second surface 100B that are disposed opposite each other in the thickness direction F3; and a first side 100C and a second side 100D that are disposed opposite each other in the width direction F2.

[0037] Multiple individual cells 2000 are stacked along the aforementioned length direction F1 and secured by two annular straps 10 surrounding them. Each individual cell 2000 has an explosion-proof valve (obscured in the figure) and two electrode terminals, a positive terminal and a negative terminal, spaced apart in the width direction F2. Furthermore, the explosion-proof valve and electrode terminals of each individual cell 2000 are arranged within the battery module... Figure 1 On the upper side (first side), the electrode terminals of these single cells 2000 are arranged in two rows on the upper side of the battery module, one row of electrode terminals is on Figure 1 The upper left side of the battery module is arranged at intervals F1 along the length direction, and another row of electrode terminals is located at... Figure 1 The upper right side of the battery module is arranged at intervals F1 along the length direction.

[0038] The CCS assembly 1000 is mounted on the upper side of the battery module, thereby being close to the electrode terminals of each individual cell 2000 to facilitate the connection of relevant components (such as conductive bars) on the CCS assembly 1000 to the electrode terminals.

[0039] The support plate 16 is a one-piece structure made of plastic, which can be manufactured using injection molding or vacuum forming processes. The support plate 16 has a relatively flat front (…). Figure 1 The middle side facing the observer) and the back side ( Figure 1 (The side facing away from the observer), where the back faces the aforementioned single cell 2000, while the front faces away from the single cell 2000.

[0040] Multiple first conductive bars 11 are fixedly disposed on the front side of the support plate 16 and arranged in a row at intervals along the length direction F1. These first conductive bars 11 cover one of the aforementioned two rows of electrode terminals and are electrically connected to that row of electrode terminals by welding. Multiple second conductive bars 12 are also fixedly disposed on the front side of the support plate 16 and arranged in a row at intervals along the length direction F1. These second conductive bars 12 cover the other row of the aforementioned two rows of electrode terminals and are electrically connected to that row of electrode terminals by welding. In detail, the support plate 16 has welding holes extending from its front side to its back side at the positions of each first conductive bar 11 and second conductive bar 12. A portion of the first conductive bar 11 and the second conductive bar 12 is embedded in the corresponding welding hole and protrudes from the back side of the support plate 16. The electrode terminals contact and are welded to the exposed portions of the conductive bars from the back side of the support plate 16. In addition, the size of the welding hole is smaller than the size of the first conductive bar 11 and the second conductive bar 12, so that the support plate 16 surrounding the welding hole can support the first conductive bar 11 and the second conductive bar 12.

[0041] Corresponding to the arrangement of the electrode terminals, the column where the first conductive bar 11 is located and the column where the second conductive bar 12 is located are separated by a certain distance in the width direction F2, thereby leaving space between them for arranging the flexible flat cable 100.

[0042] In this embodiment, both the first conductive bus 11 and the second conductive bus 12 are fixed to the support plate 16 by thermal riveting. Specifically, the support plate 16 has a plurality of thermal riveting posts 13 protruding from its front side, and the first conductive bus 11 and the second conductive bus 12 have thermal riveting holes for the corresponding thermal riveting posts 13 to be inserted through. During manufacturing, after the thermal riveting posts 13 of the support plate 16 are inserted through the thermal riveting holes of the conductive bus, the protruding portion of the thermal riveting post 13 is thermally melted and expanded in diameter, thereby joining the conductive bus to the support plate 16.

[0043] The first conductive busbar 11 and the second conductive busbar 12 can be aluminum busbars or copper busbars.

[0044] The flexible flat cable 100 is arranged on the front side of the support plate 16 and is located between the first conductive bar 11 and the second conductive bar 12. It also includes a first set of conductors, a second set of conductors, an insulating film 4, a plurality of through holes 5, a plurality of first slits 6 and a plurality of second slits 7.

[0045] The first group of conductors includes a plurality of first conductors 1 extending along the length direction F1, and the plurality of first conductors 1 are arranged apart from each other in the width direction F2 with a first spacing D1. The second group of conductors includes a plurality of second conductors 2 extending along the length direction F1, and the plurality of second conductors 2 are arranged apart from each other in the width direction F2 with a second spacing D2. The second group of conductors and the first group of conductors are separated from each other in the width direction F2 by a third spacing D3, the third spacing D3 being greater than the first spacing D1 and the second spacing D2, i.e., D3 > D1 and D3 > D2. The first side 100C, the plurality of first conductors 1, the plurality of second conductors 2 and the second side 100D are arranged sequentially along the width direction F2, i.e., in the width direction F2, the plurality of first conductors 1 are closer to the first side 100C than the plurality of second conductors 2, and the plurality of second conductors 2 are closer to the second side 100D than the plurality of first conductors 1.

[0046] The first conductor 1 and the second conductor 2 can be flat copper wires.

[0047] The insulating film 4 covers the first conductor 1 and the second conductor 2, and also covers the first spacing D1, the second spacing D2, and the third spacing D3. For details, please refer to... Figure 5 The insulating film 4 comprises two film layers 41, which are stacked in the thickness direction F3 and fixed to each other by an adhesive. The aforementioned first conductor 1 and second conductor 2 are sandwiched between the two film layers 41. In this way, the insulating film 4 can maintain the relative positions of the respective first conductor 1 and second conductor 2, so as to maintain electrical isolation between the respective first conductor 1 and second conductor 2.

[0048] Multiple through holes 5 are arranged spaced apart from each other along the length direction F1 at the aforementioned third spacing D3, and each through hole 5 extends from the first surface 100A to the second surface 100B. Furthermore, each through hole 5 is correspondingly located at the explosion-proof valve of each individual battery 2000 to provide a pressure relief channel when the explosion-proof valve is in operation. Additionally, in the width direction F2, each through hole 5 is positioned at the center of the third spacing D3.

[0049] Each first slit 6 extends from the first surface 100A to the second surface 100B, cutting off at least one adjacent first conductor 1 and defining a first signal lead 8. The first signal lead 8 is folded at the second surface 100B and then extended from the second surface 100B to the outside of the first side 100C. The portion (end) of the first signal lead 8 extending to the outside of the first side 100C is soldered to the first conductive bus 11 via a first soldering terminal 14. Furthermore, on the outside of the first side 100C, each first signal lead 8 is spaced apart along the length direction F1, corresponding to the position of each first conductive bus 11.

[0050] Similar to the first slit 6, each second slit 7 cuts off at least one adjacent second conductor 2 and defines a second signal lead 9. The second signal lead 9 is folded at the second surface 100B and extends from the second surface 100B to the outside of the second side 100D. The portion (end) of the second signal lead 9 extending to the outside of the second side 100D is soldered to the second conductive bus 12 via a second soldering terminal 15. Furthermore, on the outside of the second side 100D, each second signal lead 9 is spaced apart along the length direction F1, corresponding to the position of each second conductive bus 12.

[0051] By making slits on the flexible flat cable 100, multiple signal leads are obtained that can be folded out to both sides of the flexible flat cable 100. These signal leads can be connected to corresponding busbars to collect the voltage and / or temperature of the single cell 2000, while maintaining the shape uniformity of the flexible flat cable 100 in its length direction F1, thereby maintaining the structural strength uniformity and overall rigidity of the flexible flat cable 100.

[0052] Please see Figure 2Specifically, both the first slit 6 and the second slit 7 are U-shaped structures. The first slit 6 includes a first length segment 61, a second length end, and a first width segment 63. The first length segment 61 extends along the length direction F1 at a first spacing D1, and the second length segment 62 extends along the length direction F1 at another first spacing D1. The first width segment 63 connects the end of the first length segment 61 to the end of the second length segment 62 and cuts off at least one adjacent first conductor 1. The second slit 7 includes a third length segment 71, a fourth length end, and a second width segment 73. The third length segment 71 extends along the length direction F1 at a first spacing D1, and the fourth length segment 72 extends along the length direction F1 at another first spacing D1. The second width segment 73 connects the end of the third length segment 71 to the end of the fourth length segment 72 and cuts off at least one adjacent second conductor 2.

[0053] Please combine them together Figure 3 and Figure 2 Based on the first slit 6 and the second slit 7 of the above configuration, the portion of the flexible flat cable 100 defined by the first slit 6 and the second slit 7 constitutes a first signal lead 8 and a second signal lead 9 with free ends. By pulling the free ends of the first signal lead 8 and the second signal lead 9 toward the first side 100C and the second side 100D of the flexible flat cable 100 on the second side 100B, respectively, the first signal lead 8 is drawn vertically from the first side 100C and the second signal lead 9 is drawn vertically from the second side 100D.

[0054] In other embodiments, a flat cable is provided, which, when shipped from the factory, has the aforementioned first slit 6 and second slit 7, but the first signal lead 8 and the second signal lead 9 defined by the first slit 6 and the second slit 7 are not folded and led out to both sides temporarily, but are implemented by the downstream manufacturer when the flat cable enters the downstream manufacturer (e.g., CCS component 1000 manufacturer or battery module manufacturer).

[0055] The flexible flat cable 100 also includes a plurality of insulating supports 3, which are covered by an insulating film 4 at a third spacing D3 (and sandwiched between two film layers 41). Moreover, the plurality of supports 3 extend along the length direction F1 and are arranged apart from each other at a fourth spacing D4 in the width direction F2.

[0056] The support 3 can improve the structural rigidity and stability of the flexible flat cable 100, especially the part where the third spacing D3 is located, and prevent the flexible flat cable 100 from wrinkling at the part where the third spacing D3 is located during manufacturing, storage and transportation and installation into the CCS assembly 1000.

[0057] In other embodiments, the flexible flat cable 100 is not configured with the aforementioned plurality of supports 3.

[0058] The material forming the support 3 can be nylon. In addition, in order to improve the operability of manufacturing the flexible flat cable 100, the shape and size of the cross-section of the nylon support 3 can be consistent with the first conductor 1 and the second conductor 2 (the support 3 is a flat nylon wire), and further, the first spacing D1, the second spacing D2 and the fourth spacing D4 are equal, so D3 > D1 = D2 = D4.

[0059] Understandably, compared with the first conductor 1 and the second conductor 2, the support 3 does not have the function of conducting electricity and further transmitting signals, but like the first conductor 1 and the second conductor 2, it also has good structural strength, so that the flexible flat cable 100 obtains uniform structural strength and overall rigidity.

[0060] By making the material forming the support 3 a non-conductive material different from the first conductor 1 and the second conductor 2, on the one hand, the material cost of the flexible flat cable 100 can be reduced (metal, especially copper, has a relatively high material cost), and on the other hand, the insulation risk of the flexible flat cable 100 and the further CCS assembly 1000 and battery module can be reduced.

[0061] Furthermore, the second side 100B of the flexible flat cable 100 faces and abuts the support plate 16. Therefore, the first signal lead 8 and the second signal lead 9 extending from the second side 100B of the flexible flat cable 100 are sandwiched (e.g., partially sandwiched) between the flexible flat cable 100 and the support plate 16, with the folded portions of the first signal lead 8 and the second signal lead 9 being concealed beneath them by the body portion of the flexible flat cable 100. In this way, on the one hand, the body portion of the flexible flat cable 100 can protect the relatively thin first signal lead 8 and the second signal lead 9 and suppress the outward warping of the first signal lead 8 and the second signal lead 9; on the other hand, it helps to improve the aesthetic appearance of the CCS assembly 1000 and the subsequent battery module.

[0062] In this embodiment, some first signal leads 8 have only one first conductor 1, and the corresponding first width segment 63 of the first slit 6 extends between two adjacent first spacings D1 (cutting only one first conductor 1). Such first signal leads 8 are used only for acquiring the voltage of the single battery 2000. Another portion of the first signal leads 8 have two first conductors 1, and the corresponding first width segment 63 of the first slit 6 extends between three adjacent first spacings D1 (cutting two adjacent first conductors 1). Such first signal leads 8 are used only for acquiring the temperature of the single battery 2000. The remaining portion of the first signal leads 8 have three first conductors 1, and the corresponding first width segment 63 of the first slit 6 extends between four adjacent first spacings D1 (cutting three adjacent first conductors 1). Such first signal leads 8 are used for both acquiring the voltage and temperature of the single battery 2000.

[0063] In other embodiments, the CCS assembly 1000 may have a greater number of flexible flat cables 100, which are stacked along the thickness direction F3. The second surface 100B of the bottommost flexible flat cable 100 (the first flexible flat cable 100) is attached to the support plate 16, while the second surface 100B of the remaining flexible flat cables 100 is attached to the first surface 100A of the adjacent flexible flat cables 100. In this way, the number of first signal leads 8 and second signal leads 9, as well as the number of first conductors 1 and second conductors 2 in a single first signal lead 8 and a single second signal lead 9, can be easily increased, enabling the CCS assembly 1000 to collect more signals from the individual cells 2000. Furthermore, the flexible flat cables 100 have a relatively small thickness and a width greater than their original thickness, thus allowing for easy stacking of the individual flexible flat cables 100 along the thickness direction F3 while maintaining structural integrity.

[0064] Furthermore, in the embodiment of the configuration of multiple flexible flat cables 100 described in the previous paragraph, all the first signal leads 8 of the multiple flexible flat cables 100 are spaced apart along the length direction F1 on the outside of the first side 100C, and all the second signal leads 9 of the multiple flexible flat cables 100 are spaced apart along the length direction F1 on the outside of the second side 100D.

[0065] In some embodiments, an adhesive is provided between the first signal lead 8 and the second surface 100B to bond the two together, and an adhesive is also provided between the second signal lead 9 and the second surface 100B to bond the two together. This improves the conformability of the flexible flat cable 100.

[0066] The flexible flat cable 100 includes a first end 100E and a second end 100F disposed opposite each other in the longitudinal direction F1. Each of the first signal lead 8 and the second signal lead 9 is continuous with the first end 100E and disconnected from the second end 100F. An electrical connector (not shown) is disposed at the first end 100E and electrically connected to the first signal lead 8 and the second signal lead 9. In an implementation, this electrical connector is plugged into another electrical connector led out from the battery management system (BMS), thereby allowing the two plugged electrical connectors to lead the signals (e.g., voltage and temperature signals) collected by the respective first signal leads 8 and second signal leads 9 from the first end 100E of the flexible flat cable 100 to the battery management system (BMS).

[0067] This application also provides a manufacturing method. Figures 1 to 5 The method for manufacturing the flexible flat cable 100 in the illustrated embodiment, the explosion-proof method includes: Step 1: Provide an initial cable, which includes a first surface 100A and a second surface 100B disposed opposite each other in the thickness direction F3, a first side 100C and a second side 100D disposed opposite each other in the width direction F2, a plurality of first conductors 1, a plurality of supports 3 and a plurality of second conductors 2 arranged sequentially and equally spaced in the width direction F2, and an insulating film 4 covering the plurality of first conductors 1, the plurality of supports 3 and the plurality of second conductors 2, wherein each first conductor 1, each support 3 and each second conductor 2 extends along the length direction F1; The aforementioned initial cable can be obtained using the manufacturing process of a conventional flexible flat cable 100, the only difference being that the conductor in the middle part of the conventional flexible flat cable 100 is replaced with an insulating support 3 (such as nylon flat wire).

[0068] Step 2: In the area where multiple supports 3 are located, multiple through holes are opened at intervals along the length direction F1, and multiple first slits 6 are opened in the area where multiple first conductors 1 are located, and multiple second slits 7 are opened in the area where multiple second conductors 2 are located. Thus, multiple first signal leads 8 defined by multiple first slits 6 and multiple second signal leads 9 defined by multiple second slits 7 are obtained. Step 3: Fold each of the first signal leads 8 at the second surface 100B and extend them from the second surface 100B to the outside of the first side 100C. Fold each of the second signal leads 9 at the second surface 100B and extend them from the second surface 100B to the outside of the second side 100D. Then, use adhesive to bond and fix the first signal leads 8 to the second surface 100B, and use adhesive to bond and fix the second signal leads 9 to the second surface 100B.

[0069] Next, please see Figures 6 to 8 , Figures 6 to 8This application illustrates a CCS component 1000 in a battery module according to another embodiment, which has a CCS component 1000 with ... in a battery module according to another embodiment, which has a CCS component 1000 in a battery module according to another embodiment, which has a CCS component Figure 1 The structure is similar to that of the CCS component 1000; please refer to the above. Figures 1 to 5 The description is intended to be understood, and for simplicity, identical or similar components are given the same or similar reference numerals, and repetitive detailed descriptions of their identical parts are omitted. The following focuses on describing the differences between this embodiment and Embodiment 1.

[0070] exist Figures 6 to 8 In the illustrated embodiment, the CCS assembly 1000 includes a support plate 16 (represented by a rectangular dashed frame) and two cable groups mounted on the front side of the support plate 16. Each cable group includes a plurality of flexible flat cables 100, and the two cable groups are spaced apart from each other by a large distance (corresponding to the aforementioned third distance) along the width direction F2. For ease of explanation, each flexible flat cable 100 in one group is referred to as a first flexible flat cable 100, and each flexible flat cable 100 in the other group is referred to as a second flexible flat cable 100.

[0071] Multiple first flexible flat cables 100 are stacked along the thickness direction F3 at one location on the front side of the support plate 16, and multiple second flexible flat cables 100 are stacked along the thickness direction F3 at another location on the front side of the support plate 16. Both the first and second flexible flat cables 100 have a first surface 100A and a second surface 100B that are arranged opposite each other in the thickness direction F3 (which is also the stacking direction), with the second surface 100B facing the front side of the support plate 16. Furthermore, the second surface 100B of the bottommost (or innermost) first and second flexible flat cables 100 are attached to the front side of the support plate 16. Additionally, the first flexible flat cable 100 has a first side 100C that is away from the second flexible flat cable 100 in the width direction F2, and the second flexible flat cable 100 has a second side 100D that is away from the first flexible flat cable 100 in the width direction F2. It is understandable that the first side 100C and the second side 100D are respectively a length side of the first flexible flat cable 100 and the second flexible flat cable 100.

[0072] like Figure 7 and combined Figure 6As shown, the first flexible flat cable 100 includes a plurality of first conductors 1 extending along the length direction F1. The plurality of first conductors 1 are arranged at equal intervals with small spacing in the width direction F2. An insulating film 4 covers the plurality of first conductors 1 and covers the spacing between the first conductors 1. In addition, the first flexible flat cable 100 has a plurality of first slits 6 of the above configuration. Each first slit 6 extends from the first surface 100A to the second surface 100B, cutting off at least one adjacent first conductor 1 and defining a first signal lead 8. The first signal lead 8 is folded at the second surface 100B and led out from the second surface 100B to the outside of the first side 100C. The portion (end) of the first signal lead 8 leading out to the outside of the first side 100C is soldered to the first conductive bar 11 via a first soldering terminal 14. In addition, on the outside of the first side 100C, the individual first signal leads 8 are arranged at intervals along the length direction F1, thereby corresponding to the positions of the individual first conductive bars 11.

[0073] like Figure 8 Combination Figure 6 As shown, the second flexible flat cable 100 includes a plurality of second conductors 2 extending along the length direction F1. The plurality of second conductors 2 are arranged at equal intervals with small spacing in the width direction F2. An insulating film 4 covers the plurality of first conductors 1 and covers the spacing between the first conductors 1. In addition, the second flexible flat cable 100 has a plurality of second slits 7 of the above configuration. Each second slit 7 extends from the first surface 100A to the second surface 100B, cutting off at least one adjacent second conductor 2 and defining a second signal lead 9. The second signal lead 9 is folded at the second surface 100B and led out from the second surface 100B to the outside of the second side 100D. The portion (end) of the second signal lead 9 leading out to the outside of the second side 100D is soldered to the second conductive bus 12 via a second soldering terminal 15. In addition, on the outside of the second side 100D, each second signal lead 9 is arranged at intervals along the length direction F1, thereby corresponding to the position of each second conductive bus 12.

[0074] Referring to the description above, in this manner, the first signal lead 8 and the second signal lead 9 extending from the second surface 100B of each flexible flat cable 100 are sandwiched between two adjacent flexible flat cables 100 or between the lowest flexible flat cable 100 and the support plate 16, with the folded portion of the flexible flat cable 100 (body portion) shielding the first signal lead 8 and the second signal lead below it. On the one hand, the flexible flat cable 100 (body portion) can protect the relatively thin first signal lead 8 and the second signal lead 9 and suppress the outward warping of the first signal lead 8 and the second signal lead 9. On the other hand, it helps to improve the aesthetic appearance of the CCS module 1000 and the subsequent battery module. Furthermore, it can easily increase the number of first signal leads 8 and the second signal leads 9, as well as the number of first conductors 1 and second conductors 2 in a single first signal lead 8 and a single second signal lead 9, so that the CCS module 1000 can collect more signals from a single battery 2000.

[0075] exist Figures 6 to 7 In the embodiment shown, two first flexible flat cables 100 that are arbitrarily adjacent in the thickness direction F3 (i.e., the stacking direction) can be bonded together, two second flexible flat cables 100 that are arbitrarily adjacent in the thickness direction F3 can be bonded together, and the second surface 100B of the bottom first flexible flat cable 100 and the second flexible flat cable 100 can be bonded to the front side of the support plate 16 to further improve the wiring conformity and neatness of the CCS component 1000.

[0076] In addition, this application embodiment also provides a battery pack, which includes a battery module with the above structure, a battery box that houses the battery module therein, and a battery management system (BMS), wherein a flexible flat cable 100 is connected to the battery management system (BMS) via an electrical connector.

Claims

1. A flexible flat cable, characterized in that, include: A first surface and a second surface are arranged opposite each other in the thickness direction, a plurality of slits extend from the first surface to the second surface, and a long side extends in the length direction, the slits defining a signal lead; Conductor, extending along the said length direction; An insulating support extends along the length direction and is spaced apart from the conductor; An insulating film covers the conductor and the support. A through hole extends from the first surface to the second surface at the support, and avoids the conductor.

2. The flexible flat cable according to claim 1, characterized in that, The support is made of nylon.

3. The flexible flat cable according to claim 1, characterized in that, The signal lead is folded over at the second surface and then led out from the second surface to the outside of the length side.

4. A CCS component, characterized in that, include: Support plate; At least one flexible flat cable as described in any one of claims 1 to 3 is laminated on the support plate along the thickness direction, with the second surface facing the support plate.

5. A flexible flat cable, characterized in that, include: A first surface and a second surface are arranged opposite each other in the thickness direction, a plurality of slits extend from the first surface to the second surface, and a long side extends in the length direction, wherein the slits define a signal lead, and the long side includes the first side and the second side arranged opposite each other. The first group of conductors includes a plurality of first conductors extending along the length direction, the plurality of first conductors being arranged spaced apart from each other in the width direction; and, The second group of conductors includes a plurality of second conductors extending along the length direction, the plurality of second conductors being arranged spaced apart from each other in the width direction, the second group of conductors being spaced apart from the first group of conductors by a third spacing in the width direction, and the first side, the plurality of first conductors, the plurality of second conductors and the second side being arranged sequentially along the width direction; An insulating film covers the first group of conductors and the second group of conductors, and also covers the third gap; A plurality of supports made of insulating material, the plurality of supports being covered by the insulating film at the third spacing, the plurality of supports extending along the length direction and arranged spaced apart from each other in the width direction; A through hole is located at the third spacing and penetrates the plurality of supports, while avoiding the first group of conductors and the second group of conductors.

6. The flexible flat cable according to claim 5, characterized in that, The support is made of nylon.

7. The flexible flat cable according to claim 5, characterized in that, The signal lead is folded over at the second surface and then led out from the second surface to the outside of the length side.

8. A CCS component, characterized in that, include: Support plate; At least one flexible flat cable as described in any one of claims 5 to 7 is laminated on the support plate along the thickness direction, with the second surface facing the support plate.

9. A battery module, characterized in that, include: A single battery, wherein the single battery has an explosion-proof valve disposed on a first side of the battery module; The CCS component as described in claim 4 or 8 is mounted on the first side; in, The through hole is located at the explosion-proof valve.

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