Circuit board assembly and battery protection board

Abstract

The application relates to the field of circuit boards, in particular to a circuit board assembly and a battery protection board. The circuit board assembly comprises a flexible circuit board; the flexible circuit board comprises a main body part and an extension part; the extension part comprises a bending area and a cloth part area, the cloth part area is used for mounting a first preset device; the bending area is arranged between the main body part and the cloth part area, and the bending area is configured in a bending state, so that the cloth part area is opposite to one side of the main body part, and the other side of the main body part is correspondingly provided with a second preset device. The circuit board assembly provided by the application extends the extension part on the basis of the existing flexible circuit board to mount the first preset device, so that the cloth part area can be increased on the flexible circuit board, so that the battery protection board can carry a larger number of components. And the extension part can be folded back into the extension range of the main body part, so that the space occupied by the extension part can be reduced.

Description

Technical Field

[0001] This application relates to the field of circuit boards, and in particular to a circuit board assembly and a battery protection board. Background Technology

[0002] With the continuous advancement of lithium battery technology, battery capacity is gradually increasing, which places higher demands on the design of battery protection boards. As an important component of lithium batteries, the main function of the battery protection board is to monitor and protect the battery's safety during charging and discharging. Existing battery protection boards typically consist of two parts: a rigid circuit board and a flexible circuit board.

[0003] As the number of components on battery protection boards increases, the area required for flexible circuit boards also needs to expand to meet the increased component placement demands. However, due to the flexibility of their material and structural limitations, flexible circuit boards cannot easily support the additional component requirements. Therefore, optimizing the design of flexible circuit boards while ensuring the performance of battery protection boards has become a pressing issue in the current technological field. Utility Model Content

[0004] The purpose of this application is to provide a circuit board assembly and a battery protection board, which can increase the component placement area on a flexible circuit board so that the battery protection board can support a larger number of components.

[0005] This application provides a circuit board assembly, including a flexible circuit board;

[0006] The flexible circuit board includes a main body and an extension; the extension includes a bending area and a component placement area, the component placement area being used to mount a first preset device.

[0007] The bending area is disposed between the main body and the fabric area, and the bending area is configured to be bent so that the fabric area is opposite to one side of the main body, and a second preset device is correspondingly disposed on the other side of the main body.

[0008] In the above technical solution, the projection of the fabric area on the main body is located within the main body.

[0009] In the above technical solution, a support plate is further included; the support plate is installed on the main body and is disposed adjacent to the bending area.

[0010] In the above technical solution, the support plate is further located between the fabric area and the main body, which are arranged opposite to each other, and the support plate is positioned opposite to the second preset device;

[0011] The support plate is provided with a receiving space to accommodate the first preset device.

[0012] In the above technical solution, the accommodating space further includes multiple accommodating cavities, each of which corresponds one-to-one with the first preset device installed in the fabric area, so that the first preset device is placed in the corresponding accommodating cavity.

[0013] In the above technical solution, one side of the support plate is bonded to the main body, and the other side of the support plate is bonded to the area of ​​the fabric area where the first preset device is not installed.

[0014] In the above technical solution, the thickness of the support plate is further between 0.4 mm and 0.6 mm.

[0015] In the above technical solution, the second preset device is further defined as a connector.

[0016] In the above technical solution, the main body is plate-shaped and L-shaped. The main body includes a horizontal plate and a vertical plate. The bottom of the vertical plate is connected to the horizontal plate, and the top of the vertical plate is provided with an upwardly extending portion.

[0017] This application also provides a battery protection board, including the circuit board assembly described above.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] The circuit board assembly provided in this application extends outward from the location where the connector is arranged on an existing flexible circuit board to mount a first preset device. This increases the component placement area on the flexible circuit board, allowing the battery protection board to support a larger number of components. Furthermore, the extension can be folded back into the extension range of the main body (the part where the connector is arranged), reducing the space occupied by the extension.

[0020] This application also provides a battery protection board, including the circuit board assembly described in the above solution. Based on the above analysis, it is clear that the battery protection board also possesses the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A first structural schematic diagram of the circuit board assembly provided in this application;

[0023] Figure 2 A second structural schematic diagram of the circuit board assembly provided in this application;

[0024] Figure 3 This is a third structural schematic diagram of the circuit board assembly provided in this application.

[0025] In the figure: 101-Main body; 102-Extension; 103-Bending area; 104-Fabrication area; 105-First preset device; 106-Horizontal plate; 107-Vertical plate; 108-Support plate; 109-Receiving cavity; 110-Connector. Detailed Implementation

[0026] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. 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.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] Example 1

[0030] The circuit board assembly provided in this application includes a flexible circuit board. Specifically, the flexible circuit board is used in a battery protection board and connects the rigid circuit board to the terminal device to ensure smooth electrical signal transmission between components and guarantee the normal operation of the battery system. The flexible circuit board is bendable and foldable, adaptable to flexible circuit designs. This characteristic allows the flexible circuit board to be freely arranged in complex spatial layouts, meeting the circuit connection requirements in three-dimensional space.

[0031] See Figures 1 to 3 As shown, specifically, the flexible circuit board includes a main body 101 and an extension 102, and the extension 102 includes a bending area 103 and a mounting area 104. The mounting area 104 is used to mount a first preset device 105. The bending area 103 is disposed between the main body 101 and the mounting area 104, and the bending area 103 is configured in a bent state so that the mounting area 104 faces one side of the main body 101, and a second preset device is correspondingly disposed on the other side of the main body 101.

[0032] Specifically, this application extends a portion of the existing flexible circuit board to form an extension 102. The extension 102 includes a bending area 103 and a mounting area 104. The mounting area 104 is used to mount a first preset device 105, thereby increasing the mounting area 104 on the flexible circuit board so that the battery protection board can support a larger number of components. Generally, the first preset device 105 mounted on the mounting area 104 can be a capacitor, a thermistor, etc.; the second preset device mounted on the other side of the main body 101 is a connector 110.

[0033] Furthermore, to avoid the extended portion 102 occupying too much space, this application leaves a bending area 103 between the main body 101 and the fabric area 104. Utilizing the flexibility and foldability of the flexible circuit board, the extended portion 102 is flipped towards the main body 101. At this time, the bending area 103 is bent, so that the fabric area 104 is positioned opposite the main body 101, and a second preset device is correspondingly provided on the other side of the main body 101. In this way, the fabric area 104 can be folded back into the extension range of the main body 101, and the space on the back of the second preset device is reasonably utilized, greatly reducing the space occupied by the extended portion 102.

[0034] The circuit board assembly provided in this application extends an extension portion 102 onto an existing flexible circuit board to mount a first preset device 105, thereby increasing the component placement area 104 on the flexible circuit board so that the battery protection board can support a larger number of components. Furthermore, the extension portion 102 can be folded back into the extension range of the main body 101, reducing the space occupied by the extension portion 102.

[0035] In an optional embodiment, the projection of the fabric area 104 onto the main body 101 does not exceed the extension range of the main body 101.

[0036] In this embodiment, such as Figures 1 to 3 As shown, the main body 101 is plate-shaped and L-shaped, and includes a horizontal plate and a vertical plate 107. The top of the vertical plate 107 is provided with an upwardly extending portion 102, and the extension portion 102 is provided with the same width as the vertical plate 107, so that the extension portion 102 will not exceed the extension range of the main body 101 after being folded, thereby reducing the space occupied by the extension portion 102.

[0037] The right end of the horizontal plate 106 connects to the bottom of the vertical plate 107, and the left end of the horizontal plate 106 is used to connect to the rigid circuit board. Optionally, the connection between the flexible circuit board and the rigid circuit board includes soldering and crimping. Soldering is a common method for connecting FPCs and PCBs, especially for low-power applications. During soldering, solder paste laser soldering technology can be used, which is widely used when bonding FPCs and PCBs for electrical connection. Creeping is a physical connection method that achieves the connection between FPCs and PCBs through thermoforming or using adhesives. This method is suitable for high-power applications and avoids damage to the flexible circuit board caused by soldering.

[0038] In the optional solutions of this embodiment, such as Figure 1 and Figure 2 As shown, the circuit board assembly also includes a support plate 108; the support plate 108 is mounted on the main body 101 and is disposed adjacent to the bending area 103 of the extension 102.

[0039] In this embodiment, since the main body 101 is made of a soft material, while the support plate 108 has high strength and is not easily deformed, installing the support plate 108 on the main body 101 and adjacent to the extension 102 not only increases the strength of the main body 101, but also forms a boundary between the main body 101 and the extension 102 with the edge of the support plate 108. When the extension 102 bends relative to the main body 101, the main body 101 with the support plate 108 is less likely to deform, thus making the overall structure more stable. Optionally, one side of the support plate 108 can be bonded to the main body 101 with epoxy resin adhesive.

[0040] In an optional embodiment, the support plate 108 is located between the fabric area 104 and the main body 101, which are disposed opposite to each other. The support plate 108 is positioned opposite to the second preset device, so that the support plate 108 can reinforce this position of the main body 101, thereby improving the stability of the second preset device. The support plate 108 is connected to the fabric area 104, and the support plate is provided with a receiving space to accommodate the first preset device 105. Specifically, the support plate 108 is provided with a plurality of receiving cavities 109, each corresponding to a first preset device 105 installed in the fabric area 104, so that the first preset device 105 is placed in its corresponding receiving cavity 109.

[0041] In this embodiment, when the extension 102 is folded toward the main body 101, the extension 102 can be bent toward the direction where the support plate 108 is provided. The support plate 108 is connected to the fabric area 104 so that the support plate 108 also increases the strength of the fabric area 104 and increases the stability of the device. Optionally, the side of the support plate 108 facing away from the main body 101 can be bonded to the area of ​​the fabric area 104 where the first preset device 105 is not installed using epoxy resin adhesive.

[0042] In addition, since the first preset device 105 installed in the fabric area 104 protrudes from the surface of the fabric area 104, a receiving cavity 109 is provided on the support plate 108 to accommodate the first preset device 105. The first preset device 105 can be embedded in the support plate 108, which not only reduces the thickness of the device, but also the receiving cavity 109 can protect the first preset device 105.

[0043] like Figure 1 and Figure 2 As shown in the figure, the fabric area 104 is provided with six first preset devices 105, and the support plate 108 is provided with six corresponding receiving cavities 109, so that the six first preset devices 105 are placed in the six receiving cavities 109. Compared with providing a larger receiving cavity 109 on the support plate 108 to accommodate the six first preset devices 105, the receiving cavities 109 are provided one-to-one with the first preset devices 105 installed in the fabric area 104, so that the support plate 108 can also support the fabric area 104 at the position between the first preset devices 105, and the reinforcement effect of the extension 102 is better.

[0044] Specifically, the support plate 108 is provided with a receiving hole, and the wall of the receiving hole and the main body 101 form a receiving cavity 109, in which the first preset device 105 is placed. That is, the wall of the receiving hole and the main body 101 together form a groove structure, and the depth of the groove structure is the length of the receiving hole, which is also the thickness of the support plate 108. When the first preset device 105 is placed in the groove structure, the thickness of the support plate 108 can be set according to the height of the first preset device 105, thus reducing the thickness of the support plate 108.

[0045] Optionally, the support plate 108 is provided with a receiving groove, and the receiving cavity 109 is the inner cavity of the receiving groove, and the first preset device 105 is placed in the receiving groove. That is to say, the support plate 108 itself forms a groove structure with a groove bottom to accommodate the first preset device 105, but compared with the above solution, this structure increases the thickness of the support plate 108.

[0046] In an optional embodiment, the height of the first preset device 105 is generally 0.4 mm, and the thickness of the support plate 108 is between 0.4 mm and 0.6 mm, so that the receiving cavity 109 provided in the support plate 108 can accommodate the first preset device 105 and meet the tolerance requirements. The material of the support plate 108 can be steel plate or FR-4 grade reinforcing material.

[0047] Example 2

[0048] The circuit board assembly in this second embodiment is an improvement on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this second embodiment.

[0049] See Figure 3 As shown, in an optional embodiment, the second preset device is a connector 110. The connector 110 is installed on the main body 101 to achieve electrical connection between the flexible circuit board and the terminal device. The connector 110 is located on the side of the main body 101 away from the support plate 108, and the connector 110 and the support plate 108 are positioned opposite each other. Since the support plate 108 can reinforce the main body 101, placing the connector 110 in this position makes it less likely for the connector 110 to move, thereby making the connection between the connector 110 and the terminal device more stable.

[0050] Example 3

[0051] Embodiment 3 of this application provides a battery protection board, which includes the circuit board assembly of any of the above embodiments. Therefore, it has all the beneficial technical effects of the circuit board assembly of any of the above embodiments, which will not be repeated here.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. A circuit board assembly, characterized in that, Including flexible circuit boards; The flexible circuit board includes a main body and an extension; the extension includes a bending area and a component placement area, the component placement area being used to mount a first preset device. The bending area is disposed between the main body and the fabric area, and the bending area is configured to be bent so that the fabric area is opposite to one side of the main body, and a second preset device is correspondingly disposed on the other side of the main body.

2. The circuit board assembly according to claim 1, characterized in that, The projection of the fabric area onto the main body is located within the main body.

3. The circuit board assembly according to claim 1, characterized in that, It also includes a support plate; the support plate is installed on the main body and is disposed adjacent to the bending area.

4. The circuit board assembly according to claim 3, characterized in that, The support plate is located between the fabric area and the main body, which are arranged opposite to each other, and the support plate is positioned opposite to the second preset device; The support plate is provided with a receiving space to accommodate the first preset device.

5. The circuit board assembly according to claim 4, characterized in that, The accommodating space includes multiple accommodating cavities, and each accommodating cavity corresponds one-to-one with the first preset device installed in the fabric area, so that the first preset device is placed in the corresponding accommodating cavity.

6. The circuit board assembly according to claim 4, characterized in that, One side of the support plate is bonded to the main body, and the other side of the support plate is bonded to the area of ​​the fabric area where the first preset device is not installed.

7. The circuit board assembly according to claim 4, characterized in that, The thickness of the support plate is between 0.4 mm and 0.6 mm.

8. The circuit board assembly according to claim 3, characterized in that, The second preset device is a connector.

9. The circuit board assembly according to claim 1, characterized in that, The main body is plate-shaped and L-shaped. The main body includes a horizontal plate and a vertical plate. The bottom of the vertical plate is connected to the horizontal plate, and the top of the vertical plate is provided with an upwardly extending portion.

10. A battery protection board, characterized in that, Includes the circuit board assembly as described in any one of claims 1 to 9.

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