Flexible circuit board, CCS assembly and battery module

Abstract

The embodiment of the utility model discloses a flexible circuit board, a CCS assembly and a battery module. The flexible circuit board comprises a circuit layer and a shielding layer, the circuit layer comprises a main body part, a first connecting part and a second connecting part, one end of the main body part is electrically connected with the first connecting part, the other end of the main body part is electrically connected with the second connecting part, the first connecting part is configured to receive an acquisition signal of the battery cell, and the second connecting part is configured to transmit the acquisition signal to the outside; the shielding layer is arranged on one side of the circuit layer and is configured to perform anti-interference protection on the acquired signals, so that the problem that the acquired signals of the battery cell are influenced by surrounding electronic components or equipment in the transmission process can be solved, the battery management system can accurately acquire the actual operation state of the battery cell, and the battery management efficiency is improved. Therefore, the battery management system can perform more reasonable management and control on the battery cell.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a flexible circuit board, a CCS component, and a battery module. Background Technology

[0002] The CCS (Cell Connection System) module is a core component of the battery safety monitoring center. As an integrated busbar within the battery module, it not only includes the busbar but also integrates signal acquisition components, plastic structural parts, aluminum busbars, and connectors. The main function of the CCS module is to ensure reliable connections between the cells in the battery module and to assist the battery management system in efficient management and monitoring.

[0003] However, the acquisition signals of each cell in the battery module may fluctuate due to the influence of surrounding electronic components or equipment during transmission through the CCS component. This makes it impossible to accurately monitor the actual working status of the cells, which seriously affects the battery management system's management and control of the cells. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a flexible circuit board, a CCS component, and a battery module, aiming to solve the technical problem that the acquisition signal of the battery cell is affected by surrounding electronic components or equipment in the prior art.

[0005] To address the aforementioned problems, in a first aspect, this application provides a flexible circuit board, comprising:

[0006] The circuit layer includes a main body, a first connection part, and a second connection part. One end of the main body is electrically connected to the first connection part, and the other end of the main body is electrically connected to the second connection part. The first connection part is configured to receive the acquisition signal from the battery cell, and the second connection part is configured to transmit the acquisition signal to the outside world.

[0007] A shielding layer, located on one side of the line layer, is configured to provide anti-interference protection for the acquired signals.

[0008] Furthermore, in the flexible circuit board provided in this application, the flexible circuit board also includes:

[0009] The first protective layer is located on the side of the circuit layer furthest from the shielding layer; or / and,

[0010] The second protective layer is located on the side of the line layer closest to the shielding layer.

[0011] Furthermore, in the flexible circuit board provided in this application, the first protective layer includes a first base layer and a first connecting layer;

[0012] The first connecting layer is disposed between the first base layer and the wiring layer, with one side of the first connecting layer connected to the first base layer and the other side of the first connecting layer connected to the wiring layer; or / and,

[0013] The second protective layer includes a second base layer and a second connecting layer;

[0014] The second connecting layer is located between the second base layer and the line layer. One side of the second connecting layer is connected to the second base layer, and the other side of the second connecting layer is connected to the line layer.

[0015] Furthermore, in the flexible circuit board provided in this application, the flexible circuit board also includes:

[0016] The third protective layer is located on the side of the shielding layer closest to the circuit layer; or / and,

[0017] The fourth protective layer is located on the side of the shielding layer away from the line layer.

[0018] Furthermore, in the flexible circuit board provided in this application, the third protective layer includes a third base layer and a third connecting layer;

[0019] The third connecting layer is located between the third base layer and the shielding layer, with one side of the third connecting layer connected to the third base layer and the other side of the third connecting layer connected to the shielding layer; or / and,

[0020] The fourth protective layer includes a fourth base layer and a fourth connecting layer;

[0021] The fourth connecting layer is located between the fourth base layer and the shielding layer. One side of the fourth connecting layer is connected to the fourth base layer, and the other side of the fourth connecting layer is connected to the shielding layer.

[0022] Furthermore, in the flexible circuit board provided in this application, the flexible circuit board also includes a fifth connection layer;

[0023] The fifth connection layer is located between the line layer and the shielding layer, and is configured to connect the line layer and the shielding layer.

[0024] Furthermore, in the flexible circuit board provided in this application, the first connecting portion includes at least one first receiving portion;

[0025] The first receiving unit is configured to receive voltage or current signals from the battery cell; the first receiving unit includes a first buffer unit and a first sub-connecting unit, one end of the first buffer unit is electrically connected to the main body, the other end of the first buffer unit is electrically connected to one end of the first sub-connecting unit, and the other end of the first sub-connecting unit is electrically connected to the battery cell; or / and,

[0026] The first connecting part includes at least one second receiving part;

[0027] The second receiving unit is configured to receive the temperature signal of the battery cell. The second receiving unit includes a second buffer unit and a second sub-connecting unit. One end of the second buffer unit is electrically connected to the main body unit, and the other end of the second buffer unit is electrically connected to one end of the second sub-connecting unit. The other end of the second sub-connecting unit is electrically connected to the temperature acquisition module.

[0028] Furthermore, in the flexible circuit board provided in this application, the first connecting part includes three second receiving parts, and the battery cells corresponding to the three second receiving parts are the first battery cell, the second battery cell, and the third battery cell, respectively.

[0029] Among them, the first temperature of the first battery cell is less than or equal to the first temperature of the second battery cell, and the first temperature of the second battery cell is less than or equal to the first temperature of the third battery cell.

[0030] Furthermore, in the flexible circuit board provided in this application, the second connection part is electrically connected to the main control board of the battery management system using a gold finger connector.

[0031] Furthermore, in the flexible circuit board provided in this application, the main body includes at least one mounting hole;

[0032] The mounting holes are configured to mount flexible circuit boards; or / and,

[0033] The main body includes at least one first opening;

[0034] The first opening corresponds to the explosion-proof valve of the battery cell, and the first opening is configured to cooperate with the explosion-proof valve to open.

[0035] Furthermore, in the flexible circuit board provided in this application, both the circuit layer and the shielding layer are copper foil layers.

[0036] Furthermore, in the flexible circuit board provided in this application, the ratio between the thickness of the shielding layer and the thickness of the circuit layer is greater than 0.25 and less than 0.58.

[0037] Furthermore, in the flexible circuit board provided in this application, the ratio between the line width and the line spacing of the circuit layer is greater than or equal to 2.

[0038] Secondly, this application provides a CCS component, which includes:

[0039] Such as the flexible circuit board provided in the first aspect;

[0040] The busbar is electrically connected to the first connection section and the battery cell respectively;

[0041] An insulating shell is configured to assemble a busbar and a flexible circuit board to form a CCS assembly.

[0042] Furthermore, in the CCS component provided in this application, the busbar includes at least one first aluminum busbar, and the first connecting part includes at least one first receiving part;

[0043] The first aluminum busbar includes a first electrical connection part and a second electrical connection part. The first electrical connection part is electrically connected to the first receiving part by a solder pad, and the second electrical connection part is electrically connected to the positive or negative electrode of the battery cell.

[0044] Furthermore, in the CCS assembly provided in this application, the first aluminum busbar also includes a first fixing part;

[0045] The first fixing part is fixedly connected to the insulating shell.

[0046] Furthermore, in the CCS component provided in this application, the bus also includes at least two second aluminum busbars, and the first connecting part includes a first receiving part;

[0047] The two second aluminum busbars are integrally formed to form the third, fourth and fifth electrical connection parts. The positive and negative poles of adjacent cells are electrically connected by the third and fourth electrical connection parts, and the fifth electrical connection part is electrically connected to the first receiving part.

[0048] Furthermore, in the CCS component provided in this application, the fifth electrical connection part is electrically connected to the first receiving part using a solder pad.

[0049] Furthermore, in the CCS component provided in this application, the bus also includes at least one third aluminum bus, and the first connection portion includes at least one first receiving portion;

[0050] The third aluminum busbar includes a sixth electrical connection part and a seventh electrical connection part. The sixth electrical connection part is electrically connected to the positive or negative terminal of the battery cell, and the seventh electrical connection part is electrically connected to the first receiving part.

[0051] One end of the main body is located between the third aluminum busbar and the insulating shell.

[0052] Furthermore, in the CCS component provided in this application, the seventh electrical connection portion is electrically connected to the first receiving portion using a solder pad.

[0053] Furthermore, in the CCS assembly provided in this application, the third aluminum busbar also includes a second fixing part;

[0054] The second fixing part is fixedly connected to the insulating shell.

[0055] Furthermore, in the CCS component provided in this application, a groove is provided on the side of the insulating shell away from the flexible circuit board, and the groove is configured to install and fix the temperature acquisition module.

[0056] Furthermore, in the CCS assembly provided in this application, the insulating shell is provided with a second opening, which communicates with the groove.

[0057] Furthermore, in the CCS component provided in this application, the temperature acquisition module is fixedly connected to the insulating shell using foam adhesive; or / and,

[0058] The temperature acquisition module is a thermistor.

[0059] Furthermore, in the CCS assembly provided in this application, a hot riveting post is provided on the side of the insulating shell near the flexible circuit board, and the hot riveting post is configured to assemble the flexible circuit board.

[0060] Thirdly, this application provides a battery module, which includes the flexible circuit board provided in the first aspect, or the CCS component provided in the second aspect.

[0061] Furthermore, in the battery module provided in this application, the battery module also includes four battery cells, which are assembled into a battery module using a flexible circuit board or CCS assembly.

[0062] The flexible circuit board provided in this application includes a circuit layer and a shielding layer. The circuit layer includes a main body, a first connecting part, and a second connecting part. One end of the main body is electrically connected to the first connecting part, and the other end of the main body is electrically connected to the second connecting part. The first connecting part is configured to receive the acquisition signal from the battery cell, and the second connecting part is configured to transmit the acquisition signal to the outside. The shielding layer is disposed on one side of the circuit layer and is configured to provide anti-interference protection for the acquisition signal. This solves the problem that the acquisition signal from the battery cell is affected by surrounding electronic components or equipment during transmission, ensuring that the battery management system can accurately obtain the actual operating status of the battery cell. This allows the battery management system to make more reasonable management and control of the battery cell. Attached Figure Description

[0063] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0064] Figure 1 This is a first structural schematic diagram of a flexible circuit board provided in an embodiment of this application;

[0065] Figure 2 This is a schematic diagram of the second structure of the flexible circuit board provided in an embodiment of this application;

[0066] Figure 3 A schematic diagram of the third structure of the flexible circuit board provided in an embodiment of this application;

[0067] Figure 4 This is a schematic diagram of the structure of the CCS component provided in the embodiments of this application;

[0068] Figure 5 Wiring diagram of a flexible circuit board provided in an embodiment of this application.

[0069] Figure label:

[0070] 1 is a flexible circuit board, 10 is a circuit layer, 20 is an insulating layer, 30 is a first protective layer, 31 is a first base layer, 32 is a first connecting layer, 40 is a second protective layer, 41 is a second base layer, 42 is a second connecting layer, 50 is a third protective layer, 51 is a third base layer, 52 is a third connecting layer, 60 is a fourth protective layer, 61 is a fourth base layer, 62 is a fourth connecting layer, 70 is a fifth connecting layer, 100 is the main body, 110 is a mounting hole, 120 is a first opening, 200 is a first connecting part, 210 is a first receiving part, 211 is a first buffer part, 212 is a first sub-connecting part, and 220 is a second connecting part. Two receiving sections, 221 is the second buffer section, 222 is the second sub-connection section, 300 is the second connection section, 2 is the busbar, 21 is the first aluminum busbar, 201 is the first electrical connection section, 202 is the second electrical connection section, 22 is the second aluminum busbar, 203 is the third electrical connection section, 204 is the fourth electrical connection section, 205 is the fifth electrical connection section, 23 is the third aluminum busbar, 206 is the sixth electrical connection section, 207 is the seventh electrical connection section, 208 is the first fixing section, 209 is the second fixing section, 3 is the insulating shell, 301 is the second opening, 4 is the temperature acquisition module, 5 is the gold finger connector, 6 is the foam adhesive, and 7 is the solder pad. Detailed Implementation

[0071] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0072] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0073] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0074] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0075] Furthermore, in this application, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific implementation.

[0076] In related technologies, when designing CCS components in battery modules, wiring harnesses or FPCs (Flexible Printed Circuits) are typically used to acquire voltage, current, and temperature data from the battery cells. During transmission via wiring harnesses or FPCs, the acquired signals from the cells are susceptible to electromagnetic interference from surrounding electronic components or equipment, causing signal jumps. This results in inaccurate monitoring of the actual operating status of the cells, severely impacting the battery management system's management and control of the cells.

[0077] For wiring harness solutions, a daisy chain (wire winding method) is usually used to solve the EMC (Electromagnetic Compatibility) problem of the battery cell's acquisition signal, that is, to prevent the battery cell's acquisition signal from being affected by surrounding electronic components or equipment during transmission.

[0078] However, for FPC solutions, there is still no good solution to effectively solve the EMC (Electromagnetic Compatibility) problem of the battery cell's acquisition signal.

[0079] To address this, this application provides a flexible circuit board, a CCS module, and a battery module. The flexible circuit board includes a circuit layer and a shielding layer. The circuit layer includes a main body, a first connection portion, and a second connection portion. One end of the main body is electrically connected to the first connection portion, and the other end of the main body is electrically connected to the second connection portion. The first connection portion is configured to receive the acquisition signal from the battery cell, and the second connection portion is configured to transmit the acquisition signal to the outside world. The shielding layer is disposed on one side of the circuit layer and is configured to provide anti-interference protection for the acquisition signal. This solves the problem of the battery cell's acquisition signal being affected by surrounding electronic components or equipment during transmission, ensuring that the battery management system can accurately obtain the actual operating status of the battery cell, thereby enabling the battery management system to make more reasonable management and control of the battery cell.

[0080] Please see Figure 1 and Figure 3 , Figure 1 This is a schematic diagram of the first structure of the flexible circuit board provided in an embodiment of this application. Figure 3 This is a schematic diagram of the third structure of the flexible circuit board provided in an embodiment of this application.

[0081] like Figure 1 and Figure 3 As shown, this application provides a flexible circuit board 1, which includes:

[0082] The line layer 10 includes a main body 100, a first connection part 200 and a second connection part 300. One end of the main body 100 is electrically connected to the first connection part 200, and the other end of the main body 100 is electrically connected to the second connection part 300. The first connection part 200 is configured to receive the acquisition signal from the battery cell, and the second connection part 300 is configured to transmit the acquisition signal to the outside world.

[0083] A shielding layer is located on one side of the line layer 10 and is configured to provide anti-interference protection for the acquired signals.

[0084] Flexible printed circuit boards (FPCs), also known as flexible boards or flexographic boards, are printed circuit boards made of flexible insulating substrates. Key features of FPCs include flexibility, thinness, high-density wiring, and high reliability. They are typically composed of polyimide (PI) film and copper foil.

[0085] In this embodiment, the acquisition signal of the battery cell can be transmitted to the battery management system through the lines in the line layer 10. The line layer 10 includes a main body 100, a first connection part 200 and a second connection part 300. The first connection part 200 is configured to receive the acquisition signal of the battery cell. The acquisition signal can be transmitted to the outside world through the first connection part 200, the main body 100 and the second connection part 300 in sequence, that is, it can be transmitted to the main control board of the battery management system through the second connection part 300.

[0086] Specifically, the flexible circuit board 1 provided in this application is also provided with a shielding layer, which can provide anti-interference protection for the battery cell's acquisition signal, that is, it can shield against electromagnetic interference from surrounding components, thereby ensuring that the battery cell's acquisition signal is not affected by interference from surrounding components. The battery cell's acquisition signal can be at least one of a voltage signal, a current signal, and a temperature signal.

[0087] Meanwhile, when using a shielding layer to solve the problem of interference resistance of the battery cell's acquisition signal, the shielding layer can be a copper foil layer, and the circuit layer 10 can also be a copper foil layer.

[0088] In some embodiments, the ratio between the thickness of the shielding layer and the thickness of the circuit layer 10 can be greater than 0.25 and less than 0.58. The thickness of the circuit layer 10 can be 70 μm, and the thickness of the shielding layer can be 18 μm.

[0089] The flexible circuit board 1 provided in this application includes a circuit layer 10 and a shielding layer. The circuit layer 10 includes a main body 100, a first connecting part 200, and a second connecting part 300. One end of the main body 100 is electrically connected to the first connecting part 200, and the other end of the main body 100 is electrically connected to the second connecting part 300. The first connecting part 200 is configured to receive the acquisition signal from the battery cell, and the second connecting part 300 is configured to transmit the acquisition signal to the outside. The shielding layer is disposed on one side of the circuit layer 10 and is configured to provide anti-interference protection for the acquisition signal. This can solve the problem that the acquisition signal of the battery cell is affected by surrounding electronic components or equipment during transmission, ensuring that the battery management system can accurately obtain the actual operating status of the battery cell, thereby enabling the battery management system to make more reasonable management and control of the battery cell.

[0090] In some embodiments, such as Figure 3 As shown, the flexible circuit board 1 also includes:

[0091] The first protective layer 30 is located on the side of the line layer 10 away from the shielding layer;

[0092] The second protective layer 40 is located on the side of the line layer 10 near the shielding layer.

[0093] In this embodiment, to prevent the circuit layer 10 from being exposed to the outside environment and damaged, a protective film can be provided on the upper and lower sides of the circuit layer 10, namely a first protective layer 30 and a second protective layer 40. The first protective layer 30 is provided on the side of the circuit layer 10 away from the shielding layer, and the second protective layer 40 is provided on the side of the circuit layer 10 closer to the shielding layer, that is, the second protective layer 40 is provided between the circuit layer 10 and the shielding layer. The thickness of the first protective layer 30 can be 50 μm, and the thickness of the second protective layer 40 can be 75 μm.

[0094] In some embodiments, such as Figure 3 As shown, the first protective layer 30 includes a first base layer 31 and a first connecting layer 32; wherein, the first connecting layer 32 is disposed between the first base layer 31 and the line layer 10, one side of the first connecting layer 32 is connected to the first base layer 31, and the other side of the first connecting layer 32 is connected to the line layer 10; the second protective layer 40 includes a second base layer 41 and a second connecting layer 42; wherein, the second connecting layer 42 is disposed between the second base layer 41 and the line layer 10, one side of the second connecting layer 42 is connected to the second base layer 41, and the other side of the second connecting layer 42 is connected to the line layer 10.

[0095] In this embodiment, both the first base layer 31 and the second base layer 41 can be PI film (polyimide film), and both the first connecting layer 32 and the second connecting layer 42 can be AD film (acrylic pure rubber film). The first connecting layer 32 is configured to connect the first base layer 31 and the circuit layer 10, and the second connecting layer 42 is configured to connect the second base layer 41 and the circuit layer 10.

[0096] The thickness of the first base layer 31 can be 25 μm, the thickness of the first connecting layer 32 can be 25 μm, the thickness of the second base layer 41 can be 25 μm, and the thickness of the second connecting layer 42 can be 50 μm.

[0097] In some embodiments, such as Figure 3 As shown, the flexible circuit board 1 also includes:

[0098] The third protective layer 50 is located on the side of the shielding layer closest to the line layer 10;

[0099] The fourth protective layer 60 is located on the side of the shielding layer away from the line layer 10.

[0100] In this embodiment, to prevent the shielding layer from being damaged by external exposure, a protective film can be provided on the upper and lower sides of the shielding layer, namely a third protective layer 50 and a fourth protective layer 60. The third protective layer 50 is located on the side of the shielding layer closer to the circuit layer 10, that is, between the shielding layer and the circuit layer 10, and the fourth protective layer 60 is located on the side of the shielding layer away from the circuit layer 10. The thickness of the third protective layer 50 can be 25 μm, and the thickness of the fourth protective layer 60 can be 50 μm.

[0101] In some embodiments, such as Figure 3 As shown, the third protective layer 50 includes a third base layer 51 and a third connecting layer 52; wherein, the third connecting layer 52 is disposed between the third base layer 51 and the shielding layer, one side of the third connecting layer 52 is connected to the third base layer 51, and the other side of the third connecting layer 52 is connected to the shielding layer; the fourth protective layer 60 includes a fourth base layer 61 and a fourth connecting layer 62; wherein, the fourth connecting layer 62 is disposed between the fourth base layer 61 and the shielding layer, one side of the fourth connecting layer 62 is connected to the fourth base layer 61, and the other side of the fourth connecting layer 62 is connected to the shielding layer.

[0102] In this embodiment, the third base layer 51 and the fourth base layer 61 can both be PI film (polyimide film), and the third connecting layer 52 and the fourth connecting layer 62 can both be AD film (acrylic pure rubber film). The third connecting layer 52 is configured to connect the third base layer 51 and the shielding layer, and the fourth connecting layer 62 is configured to connect the fourth base layer 61 and the shielding layer.

[0103] The thickness of the third base layer 51 can be 12.5 μm, the thickness of the third connecting layer 52 can be 12.5 μm, the thickness of the fourth base layer 61 can be 25 μm, and the thickness of the fourth connecting layer 62 can be 25 μm.

[0104] In some embodiments, such as Figure 3 As shown, the flexible circuit board 1 also includes a fifth connection layer 70; wherein, the fifth connection layer 70 is disposed between the circuit layer 10 and the shielding layer, and the fifth connection layer 70 is configured to connect the circuit layer 10 and the shielding layer.

[0105] In this embodiment, the circuit layer 10 and the shielding layer can be connected by a fifth connection layer 70. The fifth connection layer 70 can be an AD film (acrylic pure adhesive film) and the thickness of the fifth connection layer 70 can be 25μm.

[0106] The shielding layer mentioned in this application can be a single-sided board formed after adding a third protective layer 50. The circuit layer 10 can be formed by directly forming a copper foil layer from a cut-out board. When it is necessary to bond the circuit layer 10 to the shielding layer, the first protective layer 30 and the second protective layer 40 can be bonded to the upper and lower sides of the circuit layer 10 in advance, and a fourth protective layer 60 can be set above the shielding layer. Then, the fifth connecting layer 70 is used for bonding, and the flexible circuit board 1 provided in this application can be obtained.

[0107] It should be noted that this application can also directly combine the second protective layer 40 and the third protective layer 50 into a three-layer structure, which can be AD layer, PI layer and AD layer from top to bottom.

[0108] In some embodiments, such as Figure 1 and Figure 4 As shown, the first connection portion 200 includes at least one first receiving portion 210; wherein, the first receiving portion 210 is configured to receive voltage signals or current signals from the battery cell; the first receiving portion 210 includes a first buffer portion 211 and a first sub-connection portion 212, one end of the first buffer portion 211 is electrically connected to the main body portion 100, the other end of the first buffer portion 211 is electrically connected to one end of the first sub-connection portion 212, and the other end of the first sub-connection portion 212 is electrically connected to the battery cell.

[0109] In this embodiment, the voltage or current signal of the battery cell can be input from the first receiving part 210 of the first connection part 200, and can be transmitted to the second connection part 300 via the main body part 100, and finally input to the main control board of the battery management system via the second connection part 300.

[0110] Meanwhile, since the size of the battery cell changes when it expands, a buffer area, namely a first buffer portion 211, needs to be provided at the first receiving part 210 to prevent the flexible circuit board 1 from tearing during the expansion process. The first receiving part 210 includes the first buffer portion 211 and a first sub-connecting part 212. One end of the first buffer portion 211 is electrically connected to the main body part 100, and the other end of the first buffer portion 211 is electrically connected to one end of the first sub-connecting part 212. The other end of the first sub-connecting part 212 is electrically connected to the battery cell. The width of the first buffer portion 211 can be 4mm, and the width of the first buffer portion 211 can be designed according to the space and position at the first receiving part 210. The shape of the first buffer portion 211 can be S-shaped, L-shaped, or other shapes.

[0111] In some embodiments, such as Figure 1 , Figure 2 and Figure 4As shown, the first connection part 200 includes at least one second receiving part 220; wherein, the second receiving part 220 is configured to receive the temperature signal of the battery cell; the second receiving part 220 includes a second buffer part 221 and a second sub-connecting part 222, one end of the second buffer part 221 is electrically connected to the main body part 100, the other end of the second buffer part 221 is electrically connected to one end of the second sub-connecting part 222, and the other end of the second sub-connecting part 222 is electrically connected to the temperature acquisition module 4.

[0112] In this embodiment, the first connection part 200 includes at least one second receiving part 220. The temperature signal of the battery cell can be input through the second receiving part 220 of the first connection part 200, and can be transmitted through the main body part 100 to the second connection part 300, and finally input to the main control board of the battery management system through the second connection part 300. The temperature acquisition module 4 can be a thermistor.

[0113] Similarly, since the size of the battery cell changes when it expands, a buffer area, namely a second buffer portion 221, needs to be provided at the second receiving part 220 to prevent the flexible circuit board 1 from tearing during the expansion process. The second receiving part 220 includes the second buffer portion 221 and the second sub-connecting part 222. One end of the second buffer portion 221 is electrically connected to the main body part 100, and the other end of the second buffer portion 221 is electrically connected to one end of the second sub-connecting part 222. The other end of the second sub-connecting part 222 is electrically connected to the battery cell. The width of the second buffer portion 221 can be 4mm, and the width of the second buffer portion 221 can be designed according to the space and position of the second receiving part 220. The shape of the second buffer portion 221 can be S-shaped, L-shaped, or other shapes.

[0114] In some embodiments, the first connection portion 200 includes three second receiving portions 220, and the battery cells corresponding to the three second receiving portions 220 are respectively a first battery cell, a second battery cell, and a third battery cell; wherein, the first temperature of the first battery cell is less than or equal to the first temperature of the second battery cell, and the first temperature of the second battery cell is less than or equal to the first temperature of the third battery cell.

[0115] Specifically, when setting temperature acquisition points for cells in the battery module, this application can conduct charge-discharge simulation tests in advance to determine the highest temperature of each cell in the battery module, i.e., the first temperature. Then, based on the highest temperature of each cell, the location of the temperature acquisition points to be set in the battery module and the cells that need to be monitored for temperature are determined.

[0116] In this embodiment, after performing charge and discharge simulation tests on the cells in the battery module, the highest temperature of each cell can be obtained. Based on the highest temperature, the cell with the highest temperature (the third cell) and the cell with the lowest temperature (the first cell) in the battery module can be determined, and then two temperature acquisition points can be set based on this.

[0117] In addition, in order to better monitor the temperature of the battery cells, this application can add an extra temperature acquisition point, specifically the battery cell (the second battery cell) whose temperature is between the highest and lowest temperatures in the battery module.

[0118] In some embodiments, such as Figure 1 and Figure 4 As shown, the second connection part 300 is electrically connected to the main control board of the battery management system using a gold finger connector 5.

[0119] In this embodiment, a gold finger connector 5 can be provided at the second connection part 300. The gold finger connector 5 can be connected to the main control board of the battery management system to realize the transmission of the acquired signal. At the same time, the gold finger connector 5 can also be directly plugged into and unplugged from the main control board of the battery management system.

[0120] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the main body 100 includes at least one mounting hole 110; wherein the mounting hole 110 is configured to mount the flexible circuit board 1.

[0121] Specifically, this application may provide three mounting holes 110 on the main body 100, which can be configured to mount the flexible circuit board 1 onto the insulating shell 3, thereby achieving a fixed connection between the flexible circuit board 1 and the insulating shell 3.

[0122] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the main body 100 includes at least one first opening 120; wherein the first opening 120 corresponds to the explosion-proof valve of the battery cell, and the first opening 120 is configured to cooperate with the explosion-proof valve to open.

[0123] Specifically, this application can provide three first openings 120 on the main body 100. The first openings 120 can serve as openings for the cell explosion-proof valve. That is, the cell explosion-proof valve can be located below the flexible circuit board 1. The first openings 120 can correspond to the explosion-proof valve, and the shape and size of the first openings 120 can be consistent with the shape and size of the explosion-proof valve to ensure that the explosion-proof valve can open smoothly after the cell experiences thermal runaway, preventing the valve from being blocked and causing the battery to explode.

[0124] In some embodiments, such as Figure 5 As shown, the ratio between the line width and the line spacing of line layer 10 is greater than or equal to 2.

[0125] In this embodiment, in order to ensure that the voltage, current and temperature of the battery cell can be accurately collected, the ratio between the line width and the line spacing of the circuit layer 10 is greater than or equal to 2, and the line width must be greater than or equal to 0.6 mm and the line spacing must be greater than or equal to 0.3 mm.

[0126] In some embodiments, such as Figure 4 As shown, this application provides a CCS component, which includes:

[0127] Flexible circuit board 1;

[0128] Busbar 2 is electrically connected to the first connection part 200 and the battery cell respectively;

[0129] The insulating shell 3 is configured to assemble the busbar 2 and the flexible circuit board 1 to form a CCS assembly.

[0130] In this embodiment, the CCS component includes a flexible circuit board 1, a busbar 2, and an insulating shell 3. The acquisition signals of the cells in the battery module can be transmitted sequentially through the busbar 2 and the flexible circuit board 1 to the main control board of the battery management system.

[0131] The insulating shell 3 serves as insulation, support, buffer, adhesion, and encapsulation for components such as the busbar 2 and flexible circuit board 1 in the CCS module. The insulating shell 3 effectively isolates the positive and negative terminals of the battery, preventing short circuits and other malfunctions. Specifically, the insulating shell 3 can act as a plastic support, providing insulation and support for the busbar 2 and flexible circuit board 1.

[0132] Busbar 2 may include multiple aluminum busbars and can serve as a conductive busbar for series-connected battery cells in a battery module. The main function of busbar 2 is to connect multiple battery cells to improve battery voltage and overall performance.

[0133] In some embodiments, such as Figure 1 and Figure 4 As shown, the busbar 2 includes at least one first aluminum busbar 21, and the first connection part 200 includes at least one first receiving part 210; wherein, the first aluminum busbar 21 includes a first electrical connection part 201 and a second electrical connection part 202, the first electrical connection part 201 is electrically connected to the first receiving part 210 by means of a solder pad 7, and the second electrical connection part 202 is electrically connected to the positive or negative terminal of the battery cell.

[0134] In this embodiment, the first aluminum busbar 21 and the first receiving part 210 can be soldered together using pads 7 to prevent the acquisition points between the flexible circuit board 1 and the first aluminum busbar 21 from detaching, thereby achieving stable acquisition and monitoring of the battery cell voltage. The first electrical connection part 201 and the second electrical connection part 202 can be integrally formed to create the first aluminum busbar 21.

[0135] Specifically, the first aluminum busbar 21 can be set at... Figure 4 The second electrical connection 202, located at the upper left of the CCS assembly, can be electrically connected to the positive or negative terminal of the battery cells arranged in the first row of the CCS assembly. The CCS assembly can have four battery cells, and the four battery cells can... Figure 4 Arranged from top to bottom, the positive and negative terminals of each cell can be located at the left and right ends of the main body 100, respectively.

[0136] Furthermore, in some embodiments, such as Figure 1 and Figure 4 As shown, the first aluminum busbar 21 also includes a first fixing part 208; wherein, the first fixing part 208 is fixedly connected to the insulating shell 3.

[0137] In this embodiment, the first electrical connection part 201, the second electrical connection part 202 and the first fixing part 208 can be integrally formed to form the first aluminum busbar 21. At the same time, the first aluminum busbar 21 can be bent to form the first fixing part 208 and the second electrical connection part 202 respectively. The first fixing part 208 is fixedly connected to the insulating shell 3 to fix the first aluminum busbar 21 on the insulating shell 3.

[0138] In some embodiments, such as Figure 1 and Figure 4 As shown, the busbar 2 also includes at least two second aluminum busbars 22, and the first connection part 200 includes a first receiving part 210; wherein, the two second aluminum busbars 22 are integrally formed to form a third electrical connection part 203, a fourth electrical connection part 204 and a fifth electrical connection part 205, and the positive and negative poles of adjacent cells are electrically connected by the third electrical connection part 203 and the fourth electrical connection part 204, and the fifth electrical connection part 205 is electrically connected to the first receiving part 210.

[0139] In this embodiment, the voltage acquisition point of the flexible circuit board 1 can be located between two adjacent battery cells. The second aluminum busbar 22 corresponding to the two battery cells can be integrally formed to form a third electrical connection part 203, a fourth electrical connection part 204 and a fifth electrical connection part 205. The third electrical connection part 203 and the fourth electrical connection part 204 are each electrically connected to a battery cell, and the fifth electrical connection part 205 is electrically connected to the first receiving part 210.

[0140] Specifically, a CCS module can correspond to four battery cells, and the four battery cells can be used in... Figure 4 Arranged sequentially from top to bottom, the positive and negative terminals of each battery cell can be located at the left and right ends of the main body 100, respectively. The third electrical connection part 203 and the fourth electrical connection part 204 can be respectively provided at... Figure 4In the second and third rows, the third electrical connection part 203 can be electrically connected to the positive terminal of the second row of cells, and the fourth electrical connection part 204 can be electrically connected to the negative terminal of the third row of cells; or the third electrical connection part 203 can be electrically connected to the negative terminal of the second row of cells, and the fourth electrical connection part 204 can be electrically connected to the positive terminal of the third row of cells.

[0141] Furthermore, in some embodiments, such as Figure 1 and Figure 4 As shown, the fifth electrical connection part 205 is electrically connected to the first receiving part 210 using a solder pad 7.

[0142] In this embodiment, the second aluminum busbar 22 and the first receiving part 210 can also be soldered together using the form of solder pads 7 to prevent the acquisition points between the flexible circuit board 1 and the second aluminum busbar 22 from falling off, thereby achieving stable acquisition and monitoring of the battery cell voltage.

[0143] In some embodiments, such as Figure 1 and Figure 4 As shown, the busbar 2 also includes at least one third aluminum busbar 23, and the first connecting part 200 includes at least one first receiving part 210; wherein, the third aluminum busbar 23 includes a sixth electrical connecting part 206 and a seventh electrical connecting part 207, the sixth electrical connecting part 206 is electrically connected to the positive or negative terminal of the battery cell, and the seventh electrical connecting part 207 is electrically connected to the first receiving part 210; one end of the main body 100 is disposed between the third aluminum busbar 23 and the insulating shell 3.

[0144] In this embodiment, a portion of the main body 100 of the flexible circuit board 1 may be disposed between the third aluminum busbar 23 and the insulating shell 3. The insulating shell 3 may be fixedly connected to the third aluminum busbar 23, thereby further fixing the flexible circuit board 1 onto the insulating shell 3.

[0145] Specifically, the third aluminum busbar 23 can be set in Figure 4 The sixth electrical connection 206, located at the lower left of the CCS assembly shown, can be electrically connected to the positive or negative terminal of the battery cell arranged in the fourth row of the CCS assembly. The CCS assembly can have four battery cells, and the four battery cells can... Figure 4 Arranged from top to bottom, the positive and negative terminals of each cell can be located at the left and right ends of the main body 100, respectively.

[0146] Furthermore, in some embodiments, such as Figure 1 and Figure 4 As shown, the seventh electrical connection part 207 is electrically connected to the first receiving part 210 via a pad 7.

[0147] In this embodiment, the third aluminum busbar 23 and the first receiving part 210 can also be soldered together using the form of solder pads 7 to prevent the acquisition points between the flexible circuit board 1 and the third aluminum busbar 23 from falling off, thereby achieving stable acquisition and monitoring of the battery cell voltage.

[0148] Furthermore, in some embodiments, such as Figure 1 and Figure 4 As shown, the third aluminum busbar 23 also includes a second fixing part 209; wherein, the second fixing part 209 is fixedly connected to the insulating shell 3.

[0149] In this embodiment, the sixth electrical connection 206, the seventh electrical connection 207 and the second fixing part 209 can be integrally formed to form the third aluminum busbar 23. At the same time, the third aluminum busbar 23 can be bent to form the second fixing part 209 and the sixth electrical connection 206 respectively. The second fixing part 209 is fixedly connected to the insulating shell 3 to fix the third aluminum busbar 23 on the insulating shell 3.

[0150] In some embodiments, such as Figure 1 and Figure 4 As shown, the insulating shell 3 has a groove on the side away from the flexible circuit board 1, and the groove is configured to install and fix the temperature acquisition module 4.

[0151] In this embodiment, the temperature acquisition module 4 can be disposed between the insulating shell 3 and the battery cell to accurately acquire the temperature of the battery cell. At the same time, a groove can be provided on the side of the insulating shell 3 near the battery cell, and the temperature acquisition module 4 can be installed in the groove to acquire the temperature of the battery cell.

[0152] Furthermore, in some embodiments, such as Figure 1 and Figure 4 As shown, the insulating shell 3 is provided with a second opening 301, which is connected to the groove.

[0153] In this embodiment, the main purpose of the second opening 301 is to facilitate the electrical connection between the flexible circuit board 1 and the temperature acquisition module 4, that is, the second receiving part 220 can be electrically connected to the temperature acquisition module 4 in the groove through the second opening 301.

[0154] In some embodiments, such as Figure 1 and Figure 4 As shown, the temperature acquisition module 4 is fixedly connected to the insulating shell 3 using foam adhesive 6.

[0155] Specifically, this application uses foam adhesive 6 to fix the temperature acquisition module 4 into an insulating groove to secure the temperature acquisition module 4. The temperature acquisition module 4 can be a thermistor.

[0156] In some embodiments, such as Figure 1 and Figure 4 As shown, the insulating shell 3 has a hot riveting post on the side near the flexible circuit board 1, and the hot riveting post is configured to assemble the flexible circuit board 1.

[0157] In this embodiment, the insulating shell 3 is provided with a hot riveting post on the side near the flexible circuit board 1. The hot riveting post can be assembled with the mounting hole 110 on the main body 100 of the flexible circuit board 1, and the flexible circuit board 1 and the insulating shell can be fixed by hot riveting.

[0158] In some embodiments, this application provides a battery module including a flexible circuit board 1 or a CCS assembly. The battery module can be a low-voltage battery module or a high-voltage battery module, and can be applied to fields such as new energy vehicles.

[0159] In some embodiments, the battery module further includes four battery cells, which are assembled into a battery module using a flexible circuit board 1 or a CCS assembly.

[0160] Specifically, four battery cells can be used. Figure 4 The cells are arranged from top to bottom, with the positive and negative terminals of each cell located at the left and right ends of the main body 100, respectively. The four cells can be connected in series and assembled using a CCS assembly to obtain the battery module mentioned in this application.

[0161] It should be noted that the flexible circuit board 1 or CCS assembly provided in this application is not limited to corresponding to four battery cells, but can also correspond to other numbers of battery cells. The specific implementation method can be set according to the actual application, and this application does not make specific limitations.

[0162] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A flexible circuit board, characterized in that, include: The circuit layer includes a main body, a first connection part, and a second connection part. One end of the main body is electrically connected to the first connection part, and the other end of the main body is electrically connected to the second connection part. The first connection part is configured to receive the acquisition signal from the battery cell, and the second connection part is configured to transmit the acquisition signal to the outside world. A shielding layer is disposed on one side of the line layer, and the shielding layer is configured to provide anti-interference protection for the acquired signal.

2. The flexible circuit board according to claim 1, characterized in that, The flexible circuit board also includes: A first protective layer is disposed on the side of the circuit layer away from the shielding layer; or / and, The second protective layer is located on the side of the circuit layer closest to the shielding layer.

3. The flexible circuit board according to claim 2, characterized in that, The first protective layer includes a first base layer and a first connecting layer; Wherein, the first connecting layer is disposed between the first base layer and the circuit layer, one side of the first connecting layer is connected to the first base layer, and the other side of the first connecting layer is connected to the circuit layer; or / and The second protective layer includes a second base layer and a second connecting layer; The second connecting layer is disposed between the second base layer and the circuit layer, with one side of the second connecting layer connected to the second base layer and the other side of the second connecting layer connected to the circuit layer.

4. The flexible circuit board according to claim 1, characterized in that, The flexible circuit board also includes: A third protective layer is disposed on the side of the shielding layer near the circuit layer; or / and, The fourth protective layer is located on the side of the shielding layer away from the circuit layer.

5. The flexible circuit board according to claim 4, characterized in that, The third protective layer includes a third base layer and a third connecting layer; The third connecting layer is disposed between the third base layer and the shielding layer, with one side of the third connecting layer connected to the third base layer and the other side of the third connecting layer connected to the shielding layer; or / and, The fourth protective layer includes a fourth base layer and a fourth connecting layer; The fourth connecting layer is disposed between the fourth base layer and the shielding layer, with one side of the fourth connecting layer connected to the fourth base layer and the other side of the fourth connecting layer connected to the shielding layer.

6. The flexible circuit board according to any one of claims 1-5, characterized in that, The flexible circuit board further includes a fifth connection layer; The fifth connection layer is disposed between the line layer and the shielding layer, and the fifth connection layer is configured to connect the line layer and the shielding layer.

7. The flexible circuit board according to any one of claims 1-5, characterized in that, The first connecting part includes at least one first receiving part; The first receiving unit is configured to receive a voltage signal or a current signal from the battery cell; the first receiving unit includes a first buffer unit and a first sub-connecting unit, one end of the first buffer unit is electrically connected to the main body, the other end of the first buffer unit is electrically connected to one end of the first sub-connecting unit, and the other end of the first sub-connecting unit is electrically connected to the battery cell; or / and, The first connecting part includes at least one second receiving part; The second receiving unit is configured to receive the temperature signal of the battery cell; the second receiving unit includes a second buffer unit and a second sub-connecting unit, one end of the second buffer unit is electrically connected to the main body, the other end of the second buffer unit is electrically connected to one end of the second sub-connecting unit, and the other end of the second sub-connecting unit is electrically connected to the temperature acquisition module.

8. The flexible circuit board according to claim 7, characterized in that, The first connection part includes three second receiving parts, and the battery cells corresponding to the three second receiving parts are a first battery cell, a second battery cell, and a third battery cell, respectively; Wherein, the first temperature of the first battery cell is less than or equal to the first temperature of the second battery cell, and the first temperature of the second battery cell is less than or equal to the first temperature of the third battery cell.

9. The flexible circuit board according to any one of claims 1-5, characterized in that, The second connection part uses a gold finger connector to electrically connect to the main control board of the battery management system.

10. The flexible circuit board according to any one of claims 1-5, characterized in that, The main body includes at least one mounting hole; The mounting holes are configured to mount the flexible circuit board; or / and, The main body includes at least one first opening; The first opening corresponds to the explosion-proof valve of the battery cell, and the first opening is configured to cooperate with the explosion-proof valve to open.

11. The flexible circuit board according to any one of claims 1-5, characterized in that, The ratio between the thickness of the shielding layer and the thickness of the circuit layer is greater than 0.25 and less than 0.

58.

12. The flexible circuit board according to any one of claims 1-5, characterized in that, The ratio between the line width and the line spacing of the line layer is greater than or equal to 2.

13. A CCS component, characterized in that, include: Flexible circuit board as described in any one of claims 1-12; The busbar is electrically connected to the first connection part and the battery cell respectively; An insulating shell is configured to assemble the busbar and the flexible circuit board to form the CCS assembly.

14. The CCS component according to claim 13, characterized in that, The busbar includes at least one first aluminum busbar, and the first connecting portion includes at least one first receiving portion; The first aluminum busbar includes a first electrical connection part and a second electrical connection part. The first electrical connection part is electrically connected to the first receiving part by a solder pad, and the second electrical connection part is electrically connected to the positive or negative electrode of the battery cell.

15. The CCS component according to claim 14, characterized in that, The first aluminum busbar also includes a first fixing part; The first fixing part is fixedly connected to the insulating shell.

16. The CCS component according to claim 13, characterized in that, The busbar also includes at least two second aluminum busbars, and the first connection portion includes a first receiving portion; The two second aluminum busbars are integrally formed to form a third electrical connection part, a fourth electrical connection part and a fifth electrical connection part. The positive and negative poles of adjacent battery cells are electrically connected by the third electrical connection part and the fourth electrical connection part, and the fifth electrical connection part is electrically connected to the first receiving part.

17. The CCS component according to claim 16, characterized in that, The fifth electrical connection part is electrically connected to the first receiving part using a solder pad.

18. The CCS component according to claim 13, characterized in that, The busbar further includes at least one third aluminum busbar, and the first connection portion includes at least one first receiving portion; The third aluminum busbar includes a sixth electrical connection part and a seventh electrical connection part. The sixth electrical connection part is electrically connected to the positive or negative terminal of the battery cell, and the seventh electrical connection part is electrically connected to the first receiving part. One end of the main body is located between the third aluminum busbar and the insulating shell.

19. The CCS component according to claim 18, characterized in that, The seventh electrical connection part is electrically connected to the first receiving part using solder pads.

20. The CCS component according to claim 18, characterized in that, The third aluminum busbar also includes a second fixing part; The second fixing part is fixedly connected to the insulating shell.

21. The CCS component according to any one of claims 13-20, characterized in that, The insulating shell has a groove on the side away from the flexible circuit board, and the groove is configured to install and fix the temperature acquisition module.

22. The CCS component according to claim 21, characterized in that, The insulating shell is provided with a second opening, which communicates with the groove.

23. The CCS component according to claim 21, characterized in that, The temperature acquisition module is fixedly connected to the insulating shell using foam adhesive; or / and The temperature acquisition module is a thermistor.

24. The CCS component according to any one of claims 13-20, characterized in that, The insulating shell has a hot-riveting post on the side near the flexible circuit board, and the hot-riveting post is configured to assemble the flexible circuit board.

25. A battery module, characterized in that, Includes the flexible circuit board according to any one of claims 1-12, or the CCS assembly according to any one of claims 13-24.

26. The battery module according to claim 25, characterized in that, The battery module also includes four battery cells, which are assembled into the battery module using the flexible circuit board or the CCS assembly.

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