CCS assembly, battery module and battery pack

Abstract

The invention relates to the technical field of new energy, in particular to a CCS assembly, a battery module and a battery pack. The CCS assembly includes: a support plate; the flexible flat cables are stacked on the supporting plate in the thickness direction, each flexible flat cable comprises a first face, a second face, a plurality of kerfs and a length edge, the first face and the second face are oppositely arranged in the thickness direction, the kerfs penetrate from the first face to the second face, the length edge extends in the length direction, the second face faces the supporting plate, and the length edge extends in the length direction. Each kerf defines a signal lead, and the signal leads are led out from the second face to the outer side of the length edge after being folded at the second face.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a CCS component, a battery module and a battery pack. Background Art

[0002] In the new energy battery industry, more and more manufacturers use integrated busbars (Cells Contact System, CCS) to collect signals from battery modules, such as collecting the voltage and / or temperature of each single battery in the battery module.

[0003] CCS components have a variety of configurations, among which flexible printed circuits (FPC) and ordinary wiring harnesses are the mainstream, and a small number are flexible flat cables (FFC) structures. Among them, CCS components with FFC structure have many disadvantages that cannot be well resolved, which makes it impossible to effectively promote their use.

[0004] Patent document with publication number CN113068297A discloses a CCS assembly with an FFC structure, which obtains multiple relatively independent connecting wires by cutting and flipping the cable body, thereby ensuring the overall uprightness of the FFC on the CCS assembly. However, the CCS assembly in the document has at least the following disadvantages:

[0005] 1. When the width of the battery module is certain and the space between the conductive rows (conductive heads) is limited, the width of a single flat cable is limited, and thus the number of conductors in the flat cable is limited, resulting in a smaller number of independent connecting wires that can be obtained and a smaller number of conductors in a single connecting wire. Therefore, it may not be suitable for large battery modules with many single cells, nor for medium-sized or larger battery modules that require multi-signal acquisition (such as the voltage and temperature of each single cell).

[0006] 2. The CCS component does not take into account the issue of giving way to the explosion-proof valves of single batteries in the battery module.

[0007] 3. Each connecting wire is folded out from the outside of the flat cable, so that the connecting wire, especially the folded part of the connecting wire, is 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 and to propose a CCS component, a battery module and a battery pack.

[0009] In a first aspect, the present application provides a CCS component, including:

[0010] Support plate;

[0011] A plurality of flexible flat cables are stacked on the support plate along the thickness direction, wherein the flexible flat cables include a first surface and a second surface arranged opposite to each other in the thickness direction, a plurality of slits extending from the first surface to the second surface, and a length edge extending along the length direction, wherein the second surface faces the support plate, and each of the slits defines a signal lead, and the signal lead is folded at the second surface and led out from the second surface to the outside of the length edge.

[0012] In some possible implementations, the flexible flat cable includes:

[0013] A plurality of conductors extending along the length direction and arranged at predetermined intervals in the width direction;

[0014] an insulating film, covering the plurality of conductors and covering the set interval;

[0015] The cut cuts off at least one adjacent conductor.

[0016] In some possible implementations, the cutting includes:

[0017] A first length segment extending along the length direction at one of the first intervals;

[0018] a second length segment extending along the length direction at another of the first intervals;

[0019] The end of the first length segment is connected to the end of the second length segment, and at least one adjacent conductor is cut off.

[0020] In some possible implementations, the plurality of conductors include:

[0021] A first group of conductors includes a plurality of first conductors extending along the length direction, wherein the plurality of first conductors are arranged at a first interval in the width direction; and

[0022] a second group of conductors, comprising a plurality of second conductors extending along the length direction, the plurality of second conductors being arranged at a second interval in the width direction, the second group of conductors and the first group of conductors being spaced apart from each other at a third interval in the width direction, the third interval being greater than the first interval and the second interval, the first side, the plurality of first conductors, the plurality of second conductors and the second side being arranged in sequence along the width direction;

[0023] The length side includes a first length side and a second length side that are arranged opposite to each other, and the plurality of slits include:

[0024] a plurality of first slits, each of which cuts off at least one of the first conductors disposed adjacently thereto and defines a first signal lead, wherein the first signal lead is folded at the second surface and led out from the second surface to the outside of the first length side; and,

[0025] A plurality of second slits, each of which cuts off at least one of the adjacent second conductors and defines a second signal lead, wherein the second signal lead is folded at the second surface and led out from the second surface to the outside of the second length side;

[0026] The flexible flat cable further comprises:

[0027] a plurality of support bodies made of nylon material, the plurality of support bodies being covered by the insulating film at the third interval, the plurality of support bodies extending along the length direction and being arranged spaced apart from each other in the width direction; and,

[0028] A plurality of through holes are arranged at the third interval and spaced apart from each other along the length direction, and penetrate from the first surface to the second surface.

[0029] In some possible implementations, an adhesive is provided between the signal lead and the second surface to bond the two.

[0030] In some possible implementations, any two adjacent flexible flat cables in the thickness direction are bonded to each other.

[0031] In some possible implementations, on the outer side of the length side, the signal leads are arranged spaced apart from each other along the length direction.

[0032] In some possible implementations, the CCS assembly includes two cable groups, each of the cable groups includes the plurality of flexible flat cables, and the two cable groups are spaced apart from each other in the width direction at another set spacing that is larger than the set spacing;

[0033] The CCS component also includes:

[0034] A plurality of through holes are arranged at the other set intervals along the length direction and are spaced apart from each other.

[0035] In a second aspect, the present application proposes a battery module, comprising:

[0036] Multiple single batteries,

[0037] The CCS component as described in the first aspect;

[0038] Wherein, the signal lead is connected to the single battery.

[0039] In a third aspect, the present application proposes a battery module, comprising:

[0040] A plurality of single cells, each of the single cells having an explosion-proof valve arranged on a first side of the battery module;

[0041] The CCS assembly according to the first aspect is installed on the first side;

[0042] The plurality of explosion-proof valves are arranged spaced apart from each other along the length direction, and the plurality of through holes are arranged one by one at the plurality of explosion-proof valves.

[0043] In a fourth aspect, the present application proposes a battery pack, comprising:

[0044] The battery module as described in the second aspect or the third aspect;

[0045] A battery box for storing the battery module;

[0046] The battery management system BMS is connected to the plurality of flexible flat cables via an electrical connector.

[0047] The CCS component provided according to the present application includes: a support plate; a plurality of flexible flat cables stacked on the support plate along the thickness direction, the flexible flat cable including a first surface and a second surface arranged opposite to each other in the thickness direction, a plurality of slits extending from the first surface to the second surface, and a length edge extending along the length direction, the second surface faces the support plate, each of the slits respectively defines a signal lead, and the signal lead is folded at the second surface and led out from the second surface to the outside of the length edge. In this way, the signal lead led out from the second side of each flexible flat cable is sandwiched between two adjacent flexible flat cables or between the bottommost flexible flat cable and the support plate, and the flexible flat cable (the main body) blocks the folded part of the signal lead underneath it. On the one hand, the flexible flat cable (the main body) 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 component and further the battery module. On the other hand, it can easily increase the number of signal leads and second signal leads and the number of single signal leads and conductors in a single signal lead, so that the CCS component can collect multiple signals from more single batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0049] Figure 1It is a three-dimensional schematic diagram of a battery module provided in one embodiment of the present application.

[0050] Figure 2 It is a schematic diagram of the local structure when the first and second signal leads of the flexible flat cable have not been folded and led out.

[0051] Figure 3 yes Figure 1 Schematic diagram of the partial structure of the flexible flat cable.

[0052] Figure 4 yes Figure 1 Schematic diagram of the partial structure of the flexible flat cable.

[0053] Figure 5 yes Figure 1 Schematic diagram of the cross section of the flexible flat cable.

[0054] Figure 6 1 is a top view schematic diagram of a CCS assembly provided in one embodiment of the present application.

[0055] Figure 7 yes Figure 6 The shown diagram is a partial cross-sectional view of the CCS assembly at the first flexible flat cable.

[0056] Figure 8 yes Figure 6 The shown schematic diagram is a partial cross-sectional view of the CCS assembly at the second flexible flat cable.

[0057] Description of reference numerals:

[0058] F1-length direction, F2-width direction, F3-thickness direction;

[0059] 1000-CCS module, 2000-single battery;

[0060] 100-flexible flat cable, 100A-first side, 100B-second side, 100C-first side, 100D-second side, 100E-first end, 100F-second end;

[0061] 1- First conductor,

[0062] 2- Second conductor,

[0063] 3- support body,

[0064] 4-insulating film, 41-film layer;

[0065] D1-first spacing, D2-second spacing, D3-third spacing, D4-fourth spacing;

[0066] 5-Through hole;

[0067] 6-first slit, 61-first length segment, 62-second length segment, 63-first width segment;

[0068] 7-second slit, 71-third length segment, 72-fourth length segment, 73-second width segment;

[0069] 8- first signal lead;

[0070] 9- second signal lead;

[0071] 10-Bandage;

[0072] 11- first conductive bar;

[0073] 12- second conductive bar;

[0074] 13-hot riveting studs;

[0075] 14-first welding terminal;

[0076] 15- second welding terminal;

[0077] 16-Support plate. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described below in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application. It can be understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0079] In the description of this application, if there are terms such as "first", "second", etc., they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, an object defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects, and, for example, the term "first element" itself does not mean the existence of the "second element", and the term "second element" itself does not mean the existence of the "first element". In addition, "one" or "a" and similar words do not indicate a quantity limitation, but rather indicate the existence of at least one, and "multiple" means not less than two.

[0080] In the description of the present application, the terms “including”, “having” indicate the existence of the described features, numbers, operations, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, numbers, operations, elements and / or their combinations.

[0081] In the description of the present application, reference to "one embodiment" or "some embodiments" etc. means that one or more embodiments of the present application include a particular feature, structure or characteristic described in conjunction with the embodiment. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in the present specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0082] Figures 1 to 5 A battery module provided in an embodiment of the present application is shown, and the battery module includes a plurality of single cells 2000 and a CCS assembly 1000 .

[0083] 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 F3 that are perpendicular to each other, a first surface 100A and a second surface 100B that are oppositely arranged in the thickness direction F3, and a first side 100C and a second side 100D that are oppositely arranged in the width direction F2.

[0084] The plurality of cells 2000 are stacked and arranged along the aforementioned length direction F1, and are tied and positioned by two annular bands 10 surrounding the cells 2000. The cells 2000 have explosion-proof valves and two electrode terminals that are hidden and invisible in the figure. The two electrode terminals are respectively a positive terminal and a negative terminal, and are separated in the width direction F2. In addition, the explosion-proof valve and electrode terminals of each cell 2000 are arranged at the top of the battery module. Figure 1 The electrode terminals of the single cells 2000 are arranged in two rows on the upper side of the battery module, and one row of electrode terminals is Figure 1 The upper left side of the middle battery module is arranged at intervals along the length direction F1, and the other row of electrode terminals is at Figure 1 The upper right side of the middle battery module is arranged at intervals along the length direction F1.

[0085] The CCS assembly 1000 is installed on the upper side of the battery module so as to be close to the electrode terminals of each single battery 2000, so as to facilitate the connection between the relevant components (such as the conductive bar) on the CCS assembly 1000 and the electrode terminals.

[0086] The support plate 16 is an integrated structure of plastic material, which can be made by injection molding or vacuum molding. The support plate 16 has a relative front side ( Figure 1 The side facing the viewer) and the back side ( Figure 1 The back side faces the aforementioned single cell 2000 , while the front side faces away from the single cell 2000 .

[0087] A plurality of first conductive rows 11 are fixedly arranged on the front of the support plate 16 and arranged in a row spaced apart from each other along the length direction F1. These first conductive rows 11 cover one of the two columns of electrode terminals and are electrically connected to the column of electrode terminals by welding. A plurality of second conductive rows 12 are also fixedly arranged on the front of the support plate 16 and are spaced apart from each other along the length direction F1 and are electrically connected to the column of electrode terminals by welding. These second conductive rows 12 cover the other of the two columns of electrode terminals and are electrically connected to the column of electrode terminals by welding. In detail, the support plate 16 has a welding hole that passes through from the front to the back of each first conductive row 11 and the second conductive row 12, and a portion of the first conductive row 11 and the second conductive row 12 is embedded in the corresponding welding hole and exposed from the back of the support plate 16, and the electrode terminal contacts and welds with the exposed portion of the conductive row from the back of the support plate 16. In addition, the size of the welding hole is smaller than the size of the first conductive row 11 and the second conductive row 12, so as to support the first conductive row 11 and the second conductive row 12 by using the support plate 16 outside the welding hole.

[0088] Corresponding to the arrangement of the electrode terminals, the column where the first conductive row 11 is located is spaced apart from the column where the second conductive row 12 is located in the width direction F2 by a certain distance, thereby leaving a space for arranging the flexible flat cable 100 therebetween.

[0089] In this embodiment, the first conductive bar 11 and the second conductive bar 12 are fixed to the support plate 16 by heat riveting. Specifically, the support plate 16 has a plurality of heat riveting studs 13 protruding from the front side thereof, and the first conductive bar 11 and the second conductive bar 12 have heat riveting holes for the corresponding heat riveting studs 13 to penetrate and insert. During manufacturing, after the heat riveting studs 13 of the support plate 16 are penetrated and inserted into the heat riveting holes of the conductive bar, the protruding parts of the heat riveting studs 13 are heat-melted and expanded, thereby joining the conductive bar to the support plate 16.

[0090] The first conductive bar 11 and the second conductive bar 12 may be aluminum bars or copper bars.

[0091] The flexible flat cable 100 is arranged on the front side of the support plate 16 and is located between the first conductive row 11 and the second conductive row 12 . It also includes a first group of conductors, a second group 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 .

[0092] 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 at a first spacing D1 in the width direction F2. 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 at a second spacing D2 in the width direction F2. The second group of conductors and the first group of conductors are separated from each other by a third spacing D3 in the width direction F2, and the third spacing D3 is greater than the first spacing D1 and the second spacing D2, that is, 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 in sequence along the width direction F2, that is, 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.

[0093] The first conductor 1 and the second conductor 2 may be flat copper wires.

[0094] The insulating film 4 covers the first conductor 1 and the second conductor 2, and covers the first distance D1, the second distance D2 and the third distance D3. Figure 5 The insulating film 4 includes two film layers 41, which are stacked in the thickness direction F3 and fixed to each other by an adhesive, and the first conductor 1 and the 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 first conductors 1 and the second conductors 2, so that the first conductors 1 and the second conductors 2 are electrically isolated from each other.

[0095] The plurality of through holes 5 are arranged at intervals from each other along the length direction F1 at the aforementioned third spacing D3, and each through hole 5 penetrates from the first surface 100A to the second surface 100B. In addition, each through hole 5 is arranged one by one at the explosion-proof valve of each single cell 2000 to provide a pressure relief channel for the explosion-proof valve when it is working. In addition, in the width direction F2, each through hole 5 is arranged at the middle position of the third spacing D3.

[0096] Each first slit 6 passes through from the first surface 100A to the second surface 100B, cuts off at least one adjacent first conductor 1, and defines a first signal lead 8. The first signal lead 8 is folded at the second surface 100B, and is led out from the second surface 100B to the outside of the first side 100C, and the portion (end) of the first signal lead 8 led out to the outside of the first side 100C is welded to the first conductive row 11 via the first welding terminal 14. In addition, on the outside of the first side 100C, the first signal leads 8 are arranged at intervals along the length direction F1, so as to correspond to the positions of the first conductive rows 11.

[0097] Similar to the first slits 6, each second slit 7 cuts off at least one second conductor 2 disposed adjacently, and defines 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, and the portion (end portion) of the second signal lead 9 led out to the outside of the second side 100D is welded to the second conductive bar 12 via the second welding terminal 15. In addition, on the outside of the second side 100D, the second signal leads 9 are arranged at intervals along the length direction F1, so as to correspond to the positions of the second conductive bars 12.

[0098] By providing slits on the flexible flat cable 100, a plurality of signal leads that can be folded and led out toward both sides of the flexible flat cable 100 are obtained. These signal leads can be connected to corresponding conductive bars to collect the voltage and / or temperature of the single battery 2000. At the same time, the shape uniformity of the flexible flat cable 100 in its length direction F1 is retained, thereby retaining the structural strength uniformity and overall uprightness of the flexible flat cable 100.

[0099] See also Figure 2 Specifically, the first slit 6 and the second slit 7 are both 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 first conductor 1 disposed adjacently. 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 second conductor 2 disposed adjacently.

[0100] Please combine Figure 3 and Figure 2 Based on the first slit 6 and the second slit 7 of the above-mentioned 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 having free ends, and the free ends of the first signal lead 8 and the second signal lead 9 are respectively pulled toward the first side 100C and the second side 100D of the flexible flat cable 100 on the second surface 100B of the flexible flat cable 100, so that the first signal lead 8 is vertically led out from the first side 100C, and the second signal lead 9 is vertically led out from the second side 100D.

[0101] In other embodiments, a flat cable is provided, which has the aforementioned first slit 6 and second slit 7 thereon when it leaves the factory, but the first signal lead 8 and the second signal lead 9 respectively defined by the first slit 6 and the second slit 7 are not temporarily folded and led out to both sides, but wait until the flat cable enters a downstream manufacturer (such as a CCS component 1000 manufacturer or a battery module manufacturer) and is implemented by the downstream manufacturer.

[0102] The flexible flat cable 100 further includes a plurality of support bodies 3 made of insulating material, which are covered by an insulating film 4 at a third interval D3 (sandwiched between two film layers 41). Moreover, the plurality of support bodies 3 extend along the length direction F1 and are arranged at a fourth interval D4 in the width direction F2.

[0103] The support body 3 can improve the structural uprightness and stability of the flexible flat cable 100, especially the portion where the third spacing D3 is located, and prevent the flexible flat cable 100 from generating wrinkles at the portion where the third spacing D3 is located during the processes of manufacturing, storage, transportation and installation in the CCS assembly 1000.

[0104] In some other embodiments, the flexible flat cable 100 is not equipped with the aforementioned multiple supporting bodies 3 .

[0105] The material forming the support body 3 may be nylon. In addition, in order to improve the operability of manufacturing the flexible flat cable 100, the support body 3 made of nylon material may be consistent with the first conductor 1 and the second conductor 2 in terms of the shape and size of the cross section (the support body 3 is a nylon line of a flat line), and further, the first spacing D1, the second spacing D2 and the fourth spacing D4 are equal, therefore, D3>D1=D2=D4.

[0106] It is understandable that, compared with the first conductor 1 and the second conductor 2, the support body 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 uprightness.

[0107] The material forming the support body 3 is set to be 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 (the material cost of metal, especially copper, is relatively high). On the other hand, the insulation risk of the flexible flat cable 100 and the further CCS assembly 1000 and the battery module can be reduced.

[0108] Furthermore, the second surface 100B of the flexible flat cable 100 faces and is disposed against the support plate 16, so that the first signal lead 8 and the second signal lead 9 led out from the second surface 100B of the flexible flat cable 100 are sandwiched (e.g., partially sandwiched) between the flexible flat cable 100 and the support plate 16, and the flexible flat cable 100 (the body part) shields the folded part of the first signal lead 8 and the second signal line below it. In this way, on the one hand, the flexible flat cable 100 (the body part) can protect the relatively thin first signal lead 8 and the second signal lead 9, and suppress the first signal lead 8 and the second signal lead 9 from warping outward, and on the other hand, it helps to improve the appearance of the CCS assembly 1000 and further the battery module.

[0109] In this embodiment, part of the first signal leads 8 has only one first conductor 1, and the first width section 63 of the corresponding first slit 6 extends between two adjacent first spacings D1 (only one first conductor 1 is cut off), and such first signal leads 8 are only used to collect the voltage of the single cell 2000. Another part of the first signal leads 8 has two first conductors 1, and the first width section 63 of the corresponding first slit 6 extends between three adjacent first spacings D1 (two adjacent first conductors 1 are cut off), and such first signal leads 8 are only used to collect the temperature of the single cell 2000. The remaining part of the first signal leads 8 has three first conductors 1, and the first width section 63 of the corresponding first slit 6 extends between four adjacent first spacings D1 (three adjacent first conductors 1 are cut off), and such first signal leads 8 are used to collect both the voltage and the temperature of the single cell 2000.

[0110] In other embodiments, the CCS assembly 1000 may have a larger number of flexible flat cables 100, and these flexible flat cables 100 are stacked in the thickness direction F3, wherein the second surface 100B of the lowermost flexible flat cable 100 (the first flexible flat cable 100) is arranged against the support plate 16, and the second surfaces 100B of the remaining flexible flat cables 100 are arranged against the first surfaces 100A of the adjacent flexible flat cables 100. In this way, the number of first signal leads 8 and second signal leads 9, and 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, so that the CCS assembly 1000 can collect multiple signals of more single cells 2000. In addition, the thickness of the flexible flat cable 100 is relatively small and has a width greater than the original thickness, so that each flexible flat cable 100 can be easily stacked in the thickness direction F3 and the neatness of the structure can be ensured.

[0111] In addition, in the embodiment described in the previous paragraph in which a plurality of flexible flat cables 100 are configured, on the outside of the first side 100C, all the first signal leads 8 of the plurality of flexible flat cables 100 are arranged at intervals along the length direction F1, and on the outside of the second side 100D, all the second signal leads 9 of the plurality of flexible flat cables 100 are arranged at intervals along the length direction F1.

[0112] In some embodiments, an adhesive is provided between the first signal lead 8 and the second surface 100B to bond the two, and an adhesive is provided between the second signal lead 9 and the second surface 100B to bond the two. In this way, the conformability of the flexible flat cable 100 can be improved.

[0113] The flexible flat cable 100 includes a first end 100E and a second end 100F that are arranged opposite to each other in the length 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 in the figure, is arranged at the first end 100E and is electrically connected to the first signal lead 8 and the second signal lead 9. In implementation, the electrical connector is plugged into another electrical connector led out from the battery management system BMS, whereby the two electrical connectors plugged into each other lead the signals (such as voltage and temperature signals) collected by each first signal lead 8 and the second signal lead 9 from the first end 100E of the flexible flat cable 100 to the battery management system BMS.

[0114] The present application also provides a method for manufacturing Figures 1 to 5 The manufacturing method of the flexible flat cable 100 in the illustrated embodiment, the explosion-proof method comprises:

[0115] Step 1, providing an initial cable, the initial cable comprising a first surface 100A and a second surface 100B arranged opposite to each other in a thickness direction F3, a first side 100C and a second side 100D arranged opposite to each other in a width direction F2, a plurality of first conductors 1, a plurality of supports 3 and a plurality of second conductors 2 arranged in sequence and spaced evenly 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 a length direction F1;

[0116] The aforementioned initial cable can be obtained by adopting the manufacturing process of the conventional flexible flat cable 100 , the only difference being that the conductor in the middle portion of the conventional flexible flat cable 100 is replaced by an insulating support 3 (such as a nylon flat wire).

[0117] Step 2: a plurality of through holes arranged at intervals along the length direction F1 are provided in the region where the plurality of support bodies 3 are located, a plurality of first slits 6 are provided in the region where the plurality of first conductors 1 are located, and a plurality of second slits 7 are provided in the region where the plurality of second conductors 2 are located, thereby obtaining a plurality of first signal leads 8 respectively defined by the plurality of first slits 6, and a plurality of second signal leads 9 respectively defined by the plurality of second slits 7;

[0118] Step 3: After each first signal lead 8 is folded at the second surface 100B, it is led out from the second surface 100B to the outside of the first side 100C, and after each second signal lead 9 is folded at the second surface 100B, it is led out from the second surface 100B to the outside of the second side 100D. In addition, the first signal lead 8 is bonded and fixed to the second surface 100B by an adhesive, and the second signal lead 9 is bonded and fixed to the second surface 100B by an adhesive.

[0119] Next, see Figures 6 to 8 , Figures 6 to 8 A CCS component 1000 in a battery module provided in another embodiment of the present application is shown, which has Figure 1 The structure of CCS component 1000 is similar to that of Figures 1 to 5 For the sake of simplicity, the same or similar components are given the same or similar reference numerals, and the repeated detailed description of the same parts is omitted. The following focuses on the differences between this embodiment and the first embodiment.

[0120] exist Figures 6 to 8 In the illustrated embodiment, the CCS assembly 1000 includes a support plate 16 represented by a rectangular dotted frame and two cable groups installed on the front of the support plate 16, each cable group includes a plurality of flexible flat cables 100, and the two cable groups are separated from each other by a larger distance (corresponding to the aforementioned third distance) along the width direction F2. For convenience of description, each flexible flat cable 100 in one group of flexible flat cables 100 is referred to as a first flexible flat cable 100, and each flexible flat cable 100 in the other group of flexible flat cables 100 is referred to as a second flexible flat cable 100.

[0121] A plurality of first flexible flat cables 100 are stacked at one location on the front of the support plate 16 along the thickness direction F3, and a plurality of second flexible flat cables 100 are stacked at another location on the front of the support plate 16 along the thickness direction F3. The first flexible flat cable 100 and the second flexible flat cable 100 both have a first surface 100A and a second surface 100B that are arranged opposite to each other in the thickness direction F3 (also the stacking direction), and the second surface 100B is arranged facing the front of the support plate 16, and the second surface 100B of the first flexible flat cable 100 and the second flexible flat cable 100 of the bottom layer (or the innermost layer) is close to the front of the support plate 16. In addition, 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 can be understood that the first side 100C and the second side 100D are respectively one length side of the first flexible flat cable 100 and the second flexible flat cable 100 .

[0122] like Figure 7 Combined with Figure 6 As 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 a small interval in the width direction F2, and the insulating film 4 covers the plurality of first conductors 1 and covers the intervals between the first conductors 1. In addition, the first flexible flat cable 100 has a plurality of first slits 6 of the above-mentioned configuration, each of which penetrates from the first surface 100A to the second surface 100B, cuts at least one adjacently arranged first conductor 1, and defines 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, and the portion (end) of the first signal lead 8 led out to the outside of the first side 100C is welded to the first conductive row 11 via the first welding terminal 14. In addition, on the outside of the first side 100C, the first signal leads 8 are arranged at intervals along the length direction F1, so as to correspond to the positions of the first conductive rows 11.

[0123] like Figure 8 Combination Figure 6As 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 a small interval in the width direction F2, and the insulating film 4 covers the plurality of first conductors 1 and covers the intervals between the first conductors 1. In addition, the second flexible flat cable 100 has a plurality of second slits 7 of the above-mentioned configuration, each second slit 7 passes through from the first surface 100A to the second surface 100B, cuts at least one second conductor 2 arranged adjacently, and defines 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, and the portion (end) of the second signal lead 9 led out to the outside of the second side 100D is welded to the second conductive bar 12 via the second welding terminal 15. In addition, on the outside of the second side 100D, the second signal leads 9 are arranged at intervals along the length direction F1, so as to correspond to the positions of the second conductive bars 12.

[0124] Referring to the above description, in this way, the first signal lead 8 and the second signal lead 9 led out from the second surface 100B of each flexible flat cable 100 are sandwiched between two adjacent flexible flat cables 100 or between the bottommost flexible flat cable 100 and the support plate 16, and the flexible flat cable 100 (the body part) shields the folded part of the first signal lead 8 and the second signal line below it. On the one hand, the flexible flat cable 100 (the body part) can protect the relatively thin first signal lead 8 and the second signal lead 9 and suppress the first signal lead 8 and the second signal lead 9 from warping, on the other hand, it helps to improve the appearance of the CCS component 1000 and the further battery module, and on the other hand, it can easily increase the number of the first signal lead 8 and the second signal lead 9, and the number of the first conductor 1 and the second conductor 2 in a single first signal lead 8 and a single second signal lead 9, so that the CCS component 1000 can collect multiple signals of more single cells 2000.

[0125] exist Figure 6 to Figure 7 In the illustrated embodiment, any two adjacent first flexible flat cables 100 in the thickness direction F3 (i.e., the stacking direction) can be bonded to each other, any two adjacent second flexible flat cables 100 in the thickness direction F3 can be bonded to each other, 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 routing conformity and neatness of the CCS assembly 1000.

[0126] In addition, an embodiment of the present application also provides a battery pack, which includes a battery module of the above structure, a battery box accommodating the battery module therein, and a battery management system BMS, wherein the flexible flat cable 100 is connected to the battery management system BMS via an electrical connector.

Claims

1. A CCS component, characterized in that: include: Support plate; A plurality of flexible flat cables are stacked on the support plate along the thickness direction, the flexible flat cables comprising a first surface and a second surface arranged opposite to each other in the thickness direction, a plurality of slits extending from the first surface to the second surface, and a length edge extending along the length direction, the second surface faces the support plate, each of the slits respectively defines a signal lead, and the signal lead is folded at the second surface and led out from the second surface to the outside of the length edge.

2. The CCS assembly according to claim 1, characterized in that: The flexible flat cable comprises: A plurality of conductors extending along the length direction and arranged at predetermined intervals in the width direction; an insulating film, covering the plurality of conductors and covering the set interval; The cut cuts off at least one adjacent conductor.

3. The CCS assembly according to claim 2, characterized in that: The cutting seam comprises: A first length segment extending along the length direction at one of the first intervals; a second length segment extending along the length direction at another of the first intervals; The end of the first length segment is connected to the end of the second length segment, and at least one adjacent conductor is cut off.

4. The CCS assembly according to claim 2 or 3, characterized in that: The plurality of conductors include: A first group of conductors includes a plurality of first conductors extending along the length direction, wherein the plurality of first conductors are arranged at a first interval in the width direction; and a second group of conductors, comprising a plurality of second conductors extending along the length direction, the plurality of second conductors being arranged at a second interval in the width direction, the second group of conductors and the first group of conductors being spaced apart from each other at a third interval in the width direction, the third interval being greater than the first interval and the second interval, the first side, the plurality of first conductors, the plurality of second conductors and the second side being arranged in sequence along the width direction; The length side includes a first length side and a second length side that are arranged opposite to each other, and the plurality of slits include: a plurality of first slits, each of which cuts off at least one of the first conductors disposed adjacently thereto and defines a first signal lead, wherein the first signal lead is folded at the second surface and led out from the second surface to the outside of the first length side; and, A plurality of second slits, each of which cuts off at least one of the adjacent second conductors and defines a second signal lead, wherein the second signal lead is folded at the second surface and led out from the second surface to the outside of the second length side; The flexible flat cable further comprises: a plurality of support bodies made of nylon material, the plurality of support bodies being covered by the insulating film at the third interval, the plurality of support bodies extending along the length direction and being arranged spaced apart from each other in the width direction; and, A plurality of through holes are arranged at the third interval and spaced apart from each other along the length direction, and penetrate from the first surface to the second surface.

5. The CCS assembly according to claim 1, characterized in that: An adhesive is provided between the signal lead and the second surface to bond the two together; Optionally, any two adjacent flexible flat cables in the thickness direction are bonded to each other.

6. The CCS assembly according to claim 1, characterized in that: The signal leads are arranged outside the length side and spaced apart from each other along the length direction.

7. The CCS assembly according to any one of claims 1 to 3 and 6, characterized in that: The CCS assembly includes two cable groups, each of the cable groups includes the plurality of flexible flat cables, and the two cable groups are spaced apart from each other in the width direction at another set spacing that is larger than the set spacing; The CCS component also includes: A plurality of through holes are arranged at the other set intervals along the length direction and are spaced apart from each other.

8. A battery module, characterized in that: include: Multiple single batteries, The CCS assembly according to any one of claims 1 to 7; Wherein, the signal lead is connected to the single battery.

9. A battery module, characterized in that: include: A plurality of single cells, each of the single cells having an explosion-proof valve arranged on a first side of the battery module; The CCS assembly of claim 7, mounted 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 arranged one by one at the plurality of explosion-proof valves.

10. A battery pack, characterized in that: include: The battery module according to claim 8 or 9; A battery box for storing the battery module; The battery management system BMS is connected to the plurality of flexible flat cables via an electrical connector.

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