Battery protection plate and battery

Abstract

This application relates to the field of battery technology, and in particular to a battery protection board and a battery. The battery protection board includes a printed circuit board and a flexible circuit board. The printed circuit board includes a first board body, a first signal soldering portion, and a first current-carrying soldering portion, which are disposed on both sides of the first board body in a first direction. The flexible circuit board includes a second board body, a second signal soldering portion, and a second current-carrying soldering portion, which are disposed at both ends of the second board body for respectively engaging with the first signal soldering portion and the first current-carrying soldering portion. According to the battery protection board and battery provided in this application, the battery protection board can accommodate more signal pads, reducing the manufacturing cost and space occupancy of the battery protection board.

Description

Technical Field

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

[0002] Flexible printed circuit boards (FPCs) and printed circuit boards (PCBs) are typically connected via signal pads and current pads. Signal pads are primarily used to transmit data signals, such as audio, video, or digital signals. Current pads are primarily used to transmit current, such as for power supply applications.

[0003] With the development of electronic device technology, the functions of electronic devices are gradually increasing, which leads to a gradual increase in the number of signal pads connecting flexible circuit boards and printed circuit boards. Currently, due to space constraints on printed circuit boards and the soldering quality requirements for signal and current pads, once there are more than four signal pads, multiple additional flexible circuit boards are often needed to achieve signal transmission from the printed circuit board. This increase in the number of flexible circuit boards not only significantly increases the manufacturing cost of battery protection modules (PCMs) but also increases their space occupancy. Utility Model Content

[0004] The purpose of this application is to provide a battery protection board and a battery, so as to solve to some extent the technical problems of the prior art, which are limited by the space of the printed circuit board and the soldering quality requirements of the signal pads and current pads. Once there are more than four signal pads, two or more flexible circuit boards are often required to realize the signal transmission of the printed circuit board. As the number of flexible circuit boards increases, it not only greatly increases the manufacturing cost of the battery protection board, but also increases the space occupancy rate of the battery protection board.

[0005] According to a first aspect of this application, a battery protection board is provided, comprising a printed circuit board and a flexible circuit board;

[0006] The printed circuit board includes a first board body and an output soldering assembly. The output soldering assembly includes a first signal soldering part and a first current-passing soldering part, which are respectively disposed on opposite sides of the first board body in a first direction.

[0007] The flexible circuit board includes a second board body, a second signal welding section, and a second current welding section. The second board body includes a current welding section, a first bending section, and a signal welding section connected in sequence, so that the current welding section and the signal welding section are respectively bent to both sides of the first board body in the first direction through the first bending section.

[0008] The second signal welding part is disposed in the signal welding section for docking with the first signal welding part, and the second current-passing welding part is disposed in the current-passing welding section for docking with the first current-passing welding part.

[0009] Optionally, the flexible circuit board further includes a connector, and the second board body further includes an output connection segment, the output connection segment being connected to the end of the signal soldering segment away from the first bending segment, and the connector being disposed on the output connection segment.

[0010] Optionally, the second board body includes a signal connection layer and a current-passing connection layer, the second signal soldering part is connected to the connector via the signal connection layer, and the second current-passing soldering part is connected to the connector via the current-passing connection layer;

[0011] The signal connection layer and the current-passing connection layer are stacked along the first direction.

[0012] Optionally, the first plate body extends along a second direction, and the output welding assembly is disposed at one end of the first plate body in the second direction, the second direction intersecting the first direction.

[0013] Optionally, when the second plate body is in the unfolded state, the second plate body extends along the second direction, and the current-passing welding section, the first bending section and the signal welding section are arranged sequentially along the second direction.

[0014] Optionally, the shapes of the first flow-through welding portion and the second flow-through welding portion are adapted to each other;

[0015] The second current-passing soldering portion includes a positive electrode pad and a negative electrode pad that both extend along the second direction. The positive electrode pad and the negative electrode pad are disposed opposite each other at both ends of the second board body in a third direction, and the third direction intersects with the second direction.

[0016] Optionally, the second signal welding section includes multiple sets of signal welding components, which are arranged side by side along the second direction.

[0017] Optionally, in the same group of signal soldering components, the signal soldering component includes two signal pads, which are disposed opposite each other at both ends of the second board body in a third direction, the third direction intersecting the second direction.

[0018] Optionally, the second board body further includes an extension section that extends along a second direction and connects the signal soldering section and the output connection section, wherein the second direction intersects the first direction;

[0019] The output connection segment and at least a portion of the extension segment are arranged side by side along a third direction, which intersects the second direction.

[0020] According to a second aspect of this application, a battery is provided, including the battery protection board described in any of the above technical solutions, and thus has all the beneficial technical effects of the battery protection board, which will not be repeated here.

[0021] Compared with the prior art, the beneficial effects of this application are as follows:

[0022] The battery protection board provided in this application, by respectively setting a first signal soldering part and a first current-carrying soldering part on both sides of the first board body in a first direction, independently separates the current output and signal output of the printed circuit board. By bending the first bending section of the flexible circuit board, the second current-carrying soldering part set in the current-carrying soldering section and the second signal soldering part set in the signal soldering section are respectively set on both sides of the first board body in the first direction, so as to realize the docking of the first current-carrying soldering part with the second current-carrying soldering part and the first signal soldering part with the second signal soldering part. In this way, the same flexible circuit board can simultaneously meet the docking of the first signal soldering part and the first current-carrying soldering part located on different sides. On the one hand, by distributing the first signal soldering part and the first current-carrying soldering part on both sides of the first board body in the first direction, the back space of the first board body is effectively utilized, and the accommodating space provided by the first board body for the first signal soldering part and the first current-carrying soldering part is increased, so that the existing battery protection board can accommodate more signal pads to adapt to the development trend of current electronic devices. On the other hand, the number of flexible circuit boards is effectively reduced, thereby reducing the manufacturing cost and space occupancy of the battery protection board.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] 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.

[0025] Figure 1 A top view of the battery protection board in its unfolded state, as provided in an embodiment of this application.

[0026] Figure 2 A top view of the battery protection board in a folded state, as provided in an embodiment of this application.

[0027] Figure 3 A bottom view of the battery protection board in a folded state, as provided in an embodiment of this application.

[0028] Figure 4 A top view of the flexible circuit board in its unfolded state, as provided in an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the signal connection layer of the flexible circuit board provided in an embodiment of this application;

[0030] Figure 6 A schematic diagram of the current-passing connection layer of the flexible circuit board provided in an embodiment of this application;

[0031] Figure 7 A top view of the printed circuit board provided in an embodiment of this application;

[0032] Figure 8 A bottom view of the printed circuit board provided in an embodiment of this application;

[0033] Figure 9 This is a side view of the battery protection board provided in an embodiment of this application.

[0034] Figure label:

[0035] 1-Flexible circuit board; 11-Second board body; 111-Current-passing soldering section; 112-First bending section; 113-Signal soldering section; 114-Extension section; 115-Output connection section; 116-Second bending section; 12-Second current-passing soldering part; 121-Positive electrode pad; 122-Negative electrode pad; 13-Second signal soldering part; 131-Signal pad; 14-Connector; 15-Reinforcement board;

[0036] 2-Printed circuit board; 21-First board body; 22-First current-passing soldering part; 23-First signal soldering part.

[0037] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0038] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0039] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0040] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] 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.

[0042] In the description of this application, it should be noted that, unless otherwise expressly 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 based on the specific circumstances.

[0043] The following reference Figures 1 to 9 This application describes a battery protection board and a battery according to some embodiments.

[0044] See Figures 1 to 9As shown, an embodiment of the first aspect of this application provides a battery protection board, which includes a printed circuit board 2 and a flexible circuit board 1. The printed circuit board 2 includes a first board body 21 and an output soldering assembly. The output soldering assembly includes a first signal soldering portion 23 and a first current-carrying soldering portion 22, which are respectively disposed on opposite sides of the first board body 21 in a first direction F1. The flexible circuit board 1 includes a second board body 11, a second signal soldering portion 13, and a second current-carrying soldering portion 12, which are disposed at both ends of the second board body 11 for respectively mating with the first signal soldering portion 23 and the first current-carrying soldering portion 22.

[0045] According to the battery protection board provided by the above technical features, a first signal soldering part 23 and a first current-passing soldering part 22 are respectively provided on both sides of the first board body 21 in the first direction F1. In this way, the current-passing output and signal output of the printed circuit board 2 are independently separated. By bending the first bending section 112 of the flexible circuit board 1, the second current-passing soldering part 12 provided in the current-passing soldering section 111 and the second signal soldering part 13 provided in the signal soldering section 113 are respectively provided on both sides of the first board body 21 in the first direction F1, so as to realize the docking of the first current-passing soldering part 22 and the second current-passing soldering part 12 and the docking of the first signal soldering part 23 and the second signal soldering part 13, thereby enabling... The same flexible circuit board 1 can simultaneously meet the docking of the first signal soldering part 23 and the first current-carrying soldering part 22 located on different sides. On the one hand, by distributing the first signal soldering part 23 and the first current-carrying soldering part 22 on both sides of the first board body 21 in the first direction F1, the back space of the first board body 21 is effectively utilized, and the accommodating space that the first board body 21 can provide for the first signal soldering part 23 and the first current-carrying soldering part 22 is increased, so that the existing battery protection board can accommodate more signal pads 131 to adapt to the development trend of current electronic devices. On the other hand, the number of flexible circuit boards 1 is effectively reduced, thereby reducing the manufacturing cost and space occupancy of the battery protection board.

[0046] Specifically, such as Figure 1 and Figure 9 As shown, the second plate body 11 includes a current-passing welding section 111, a first bending section 112, and a signal welding section 113 connected in sequence, so that the current-passing welding section 111 and the signal welding section 113 are respectively bent to both sides of the first plate body 21 in the first direction F1 by the first bending section 112. The second signal welding part 13 is disposed on the signal welding section 113 for docking with the first signal welding part 23, and the second current-passing welding part 12 is disposed on the current-passing welding section 111 for docking with the first current-passing welding part 22.

[0047] like Figure 1As shown in Figure 8, the figure illustrates the view of the battery protection board along the first direction F1. In other words, the first direction F1 is perpendicular to the first board body 21. For ease of description, two intersecting directions on the plane perpendicular to the first direction F1 are defined as the second direction F2 and the third direction F3, respectively. The second direction F2 can be the extension direction of the first board body 21. Optionally, the third direction F3 can be perpendicular to the second direction F2. The F2 shown in the figure can be an example of the second direction F2, and the F3 shown in the figure can be an example of the third direction F3.

[0048] Optionally, such as Figure 2 and Figures 4 to 6 As shown, the flexible circuit board 1 may also include a connector 14, and the second board body 11 may also include an output connection section 115. The connector 14 is disposed on the output connection section 115 so as to realize the signal and circuit output of the flexible circuit through the connector 14.

[0049] Optionally, such as Figure 1 and Figure 4 As shown, the output connection section 115 is connected to the end of the signal welding section 113 away from the first bending section 112. In this way, firstly, the connection distance between the second signal welding section 13 and the connector 14 is effectively shortened; secondly, the interference of the circuit transmission of the current protection board on the signal transmission is effectively reduced; and thirdly, the connection distance between the second current welding section 12 and the connector 14 is extended, thereby improving the heat dissipation efficiency of the battery protection board during the circuit transmission process.

[0050] Furthermore, the first bending segment 112 can be fully covered with heat-dissipating copper foil to further improve the heat dissipation efficiency of the battery protection board during circuit transmission. It should be noted that laying heat-dissipating copper foil in the flexible circuit board 1 is prior art in this field and will not be elaborated upon here.

[0051] Optionally, such as Figure 5 and Figure 6 As shown, the second board body 11 may include a signal connection layer and a current connection layer. The second signal soldering part 13 is connected to the connector 14 via the signal connection layer, and the second current soldering part 12 is connected to the connector 14 via the current connection layer, so as to further reduce the mutual interference between the circuit transmission and signal transmission of the current protection board.

[0052] Optionally, as not shown in the figure, the signal connection layer and the current connection layer can be stacked along the first direction F1. It should be noted that the layering of the signal connection layer and the current connection layer is a prior art in the field of flexible circuit board 1, and will not be described in detail here.

[0053] Optionally, such as Figure 7 and Figure 8As shown, the first board body 21 can extend along the second direction F2, and the output welding assembly is disposed at one end of the first board body 21 in the second direction F2, so as to shorten the board length of the flexible circuit board 1 and further reduce the manufacturing cost of the flexible circuit board 1.

[0054] Optionally, such as Figure 1 and Figure 4 As shown in the figure, an example of the second board body 11 in an unfolded state is illustrated. The second board body 11 can also extend along the second direction F2 to facilitate the connection of the flexible circuit board 1 to the printed circuit board 2 from one side of the first board body 21 in the second direction F2. However, it is not limited to this. As shown in the figure, the second board body can also extend along a third direction to facilitate the connection of the flexible circuit board 1 to the printed circuit board 2 from one side of the first board body in the third direction.

[0055] Optionally, such as Figure 1 and Figure 4 As shown, the above-mentioned current-passing welding section 111, first bending section 112 and signal welding section 113 can be arranged sequentially along the second direction F2 so that the flexible circuit board 1 can communicate with the first current-passing welding part 22 and the first signal welding part 23 arranged opposite to each other.

[0056] Optionally, such as Figures 1 to 6 As shown, the second board body 11 may further include an extension section 114, which can extend along the second direction F2. The extension section 114 connects the signal soldering section 113 and the output connection section 115. The output connection section 115 is connected to the end of the extension section 114 away from the signal soldering section 113. In this way, the extension section 114 enables the connector 14 to be matched with the position of the connection interface of an external electrical device (such as an electronic device circuit board).

[0057] Optionally, such as Figures 1 to 6 As shown, at least a portion of the output connection segment 115 and the extension segment 114 are arranged side by side along the third direction F3, so that the output connection segment 115 can protrude relative to other parts of the second board body 11, so that the output connection segment 115 can be inserted into the connection interface of an external power device.

[0058] Optionally, such as Figure 2 and Figure 3 As shown, the flexible circuit board 1 may also include a reinforcing plate 15. The reinforcing plate 15 and the connector 14 may be disposed opposite to each other on both sides of the output connection section 115 to increase the bending strength of the output connection section 115, thereby facilitating the insertion of the output connection section 115 into the connection interface of an external electrical device.

[0059] Optionally, such as Figure 1 and Figure 4As shown, the second board body 11 may also include a second bending section 116, which can connect the output connection section 115 and the extension section 114 so that the flexible circuit board 1 can adapt to the socket angle of the connection interface of the external power device.

[0060] Optionally, such as Figure 1 , Figure 4 and Figure 7 As shown, the shapes of the first flow welding part 22 and the second flow welding part 12 are adapted to facilitate the docking of the first flow welding part 22 and the second flow welding part 12.

[0061] Optionally, such as Figure 1 and Figure 4 As shown, the second current-pass welding part 12 may include a positive electrode pad 121 and a negative electrode pad 122 that both extend along the second direction F2. The positive electrode pad 121 and the negative electrode pad 122 are disposed opposite each other at both ends of the second board body 11 in the third direction F3. On the one hand, this realizes a complete circuit for the circuit transmission of the battery protection board. On the other hand, by disposing the positive electrode pad 121 and the negative electrode pad 122 opposite each other at both ends of the second board body 11 in the third direction F3, the welding operation between the second current-pass welding part 12 and the first current-pass welding part 22 can be effectively facilitated.

[0062] Correspondingly, such as Figure 7 As shown, the first current-passing welding part 22 may also include two current-passing pads extending in the second direction F2, which are respectively connected to the positive electrode pad 121 and the negative electrode pad 122.

[0063] Optionally, the second signal welding section 13 may include multiple sets of signal welding components, which are arranged side-by-side along the second direction F2 to meet the different signal transmission requirements of the battery protection board. For example... Figure 1 , Figure 3 , Figure 4 As shown in the figure, an example of a battery protection board including three sets of signal solder joints is illustrated. However, it is not limited to this. The battery protection board may also include 4, 5, 6, or more sets of signal solder joints.

[0064] Correspondingly, such as Figure 8 As shown, the first signal welding part 23 may also include multiple sets of signal welding parts. The number of signal welding parts included in the first signal welding part 23 may be adapted to the number of signal welding parts included in the second signal welding part 13, so as to facilitate the docking of the first signal welding part 23 and the second signal welding part 13.

[0065] Optionally, such as Figure 1 , Figure 3 , Figure 4As shown, in the same group of signal soldering components, the signal soldering component includes two signal pads 131. The two signal pads 131 are arranged facing each other at both ends of the second board body 11 in the third direction F3, so that each group of signal soldering components constitutes a complete signal circuit.

[0066] The second aspect of this application also provides a battery including the battery protection board described in any of the above embodiments, and thus has all the beneficial technical effects of the battery protection board, which will not be repeated here.

[0067] Optionally, as not shown in the figure, the battery may also include a cell that can be electrically connected to the printed circuit board 2.

[0068] Optionally, not shown in the figure, the battery may further include a cell assembly, which may include multiple cells that are electrically connected to each other, and the cell assembly may be electrically connected to the printed circuit board 2.

[0069] The embodiments of the third aspect of this application also provide an electrical device including the battery protection board and / or battery described in any of the above embodiments, and thus have all the beneficial technical effects of the battery protection board and battery, which will not be repeated here.

[0070] Optionally, not shown in the figure, the electrical equipment may include an external electrical device, which is provided with a connection interface that can be adapted to the connector 14.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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. Such 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.

Claims

1. A battery protection board, characterized in that, Including printed circuit boards and flexible circuit boards; The printed circuit board includes a first board body and an output soldering assembly. The output soldering assembly includes a first signal soldering part and a first current-passing soldering part, which are respectively disposed on opposite sides of the first board body in a first direction. The flexible circuit board includes a second board body, a second signal welding part, and a second current welding part. The second signal welding part and the second current welding part are disposed at both ends of the second board body for docking with the first signal welding part and the first current welding part, respectively.

2. The battery protection board according to claim 1, characterized in that, The second plate body includes a current-passing welding section, a first bending section and a signal welding section connected in sequence, wherein the second signal welding part is disposed in the signal welding section and the second current-passing welding part is disposed in the current-passing welding section; The flexible circuit board further includes a connector, and the second board body further includes an output connection segment. The output connection segment is connected to the end of the signal welding segment away from the first bending segment, and the connector is disposed on the output connection segment.

3. The battery protection board according to claim 2, characterized in that, The second board body includes a signal connection layer and a current-passing connection layer. The second signal soldering part is connected to the connector through the signal connection layer, and the second current-passing soldering part is connected to the connector through the current-passing connection layer. The signal connection layer and the current-passing connection layer are stacked along the first direction.

4. The battery protection board according to claim 2, characterized in that, The first plate body extends along a second direction, and the output welding assembly is disposed at one end of the first plate body in the second direction, the second direction intersecting the first direction.

5. The battery protection board according to claim 4, characterized in that, When the second plate body is in the unfolded state, the second plate body extends along the second direction, and the current welding section, the first bending section and the signal welding section are arranged sequentially along the second direction.

6. The battery protection board according to claim 4, characterized in that, The shapes of the first flow-through welded portion and the second flow-through welded portion are matched; The second current-passing soldering part includes a positive electrode pad and a negative electrode pad that both extend along the second direction. The positive electrode pad and the negative electrode pad are disposed opposite each other at both ends of the second board body in a third direction, and the third direction intersects with the second direction.

7. The battery protection board according to claim 4, characterized in that, The second signal welding section includes multiple sets of signal welding components, which are arranged side by side along the second direction.

8. The battery protection board according to claim 7, characterized in that, In the same group of signal soldering components, the signal soldering component includes two signal pads, which are disposed opposite each other at both ends of the second board body in a third direction, the third direction intersecting the second direction.

9. The battery protection board according to claim 2, characterized in that, The second board body further includes an extension section that extends along a second direction and connects the signal soldering section and the output connection section, wherein the second direction intersects the first direction; The output connection segment and at least a portion of the extension segment are arranged side by side along a third direction, which intersects the second direction.

10. A battery, characterized in that, Includes the battery protection board according to any one of claims 1 to 9.

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