Circuit board, battery pack, battery pack charger, and power tool
Patent Information
- Application Number
- CN202521974875.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-15
AI Technical Summary
每个电路板通常包含主板和副板，主要电子元件设于主板，其他电子元件则设于副板，主板和副板都需要进行电连接，传统方案中，需要分别进行主板和副板的焊接，焊接工序需要进行两次，效率较为低下
[0012]本申请中，主板和副板未折断前，可以一起进行过炉焊接，焊接效率较高；同时，通过设置端子组，使得线缆可拆卸地连接主板和副板，当副板损坏时，直接更换副板，再通过线缆连接主板和副板，有利于降低成本且更换速度快。
Smart Images
Figure CN224805154U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic components, and more particularly to a circuit board, a battery pack, a battery pack charger, and a power tool. Background Technology
[0002] With the development of lithium battery technology, more and more power tools are switching from AC power to lithium battery packs, making battery packs and chargers the most important accessories for power tools. Power tools, battery packs, and chargers all include circuit boards to implement corresponding functions such as working status control, discharge control, and charging control. Each circuit board typically contains a main board and a sub-board. The main electronic components are located on the main board, while other electronic components are located on the sub-board. The main board and sub-board need to be electrically connected. In traditional solutions, the main board and sub-board need to be soldered separately, requiring two soldering processes, which is relatively inefficient. Utility Model Content
[0003] This application provides a circuit board, a battery pack, a battery pack charger, and a power tool, the structure of which has high welding efficiency.
[0004] Specifically, this application provides a circuit board including a main board, a sub-board, and a cable electrically connecting the main board and the sub-board. The main board includes a first electronic component and a first terminal group, and the sub-board includes a second electronic component and a second terminal group electrically connected to the second electronic component. The cable detachably connects the first terminal group and the second terminal group. The main board and the sub-board are integrally connected, and a break groove is provided between the main board and the sub-board, which allows the sub-board to be broken relative to the main board.
[0005] Furthermore, the extension direction of the break groove is a straight line or a broken line.
[0006] Furthermore, the circuit board also has an opening located between the main board and the sub-board, which divides the break-off groove into two parts.
[0007] Furthermore, the cross-section of the break groove is V-shaped or U-shaped, and the break groove does not penetrate through the thickness direction of the circuit board.
[0008] Furthermore, the cable is detachably plugged into the first terminal group and the second terminal group.
[0009] In addition, this application also provides a battery pack, which includes the circuit board as described above, wherein the main board is a power control board, and the second electronic component includes a power indicator light.
[0010] In addition, this application also provides a battery pack charger, which includes a circuit board as described above, the main board being a charging control board, and the second electronic component including a power terminal configured to receive electrical energy from an AC power source.
[0011] In addition, this application also provides a power tool, which includes the circuit board as described above, wherein the main board is the tool's main control board, and the second electronic component includes a switch controller.
[0012] In this application, the main board and the sub-board can be reflow soldered together before they break, resulting in high soldering efficiency. At the same time, by setting up terminal groups, the cables can be detachably connected to the main board and the sub-board. When the sub-board is damaged, it can be directly replaced, and then the main board and the sub-board can be connected by cables, which helps to reduce costs and speed up replacement. Attached Figure Description
[0013] Figure 1 This is a perspective view of a circuit board according to an embodiment of this application.
[0014] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the circuit board from another perspective.
[0015] Figure 3 This is a schematic diagram of a first embodiment of the break groove of the circuit board of this application, wherein only a portion of the circuit board is shown.
[0016] Figure 4 This is a schematic diagram of a second embodiment of the break groove of the circuit board of this application, wherein only part of the circuit board is shown.
[0017] Figure 5 This is a schematic diagram of a third embodiment of the break groove of the circuit board of this application, wherein only part of the circuit board is shown.
[0018] Figure 6 yes Figure 1 The diagram shows a three-dimensional representation of the circuit board, in which the main board and sub-board are separated. Detailed Implementation
[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.
[0020] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper" and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0021] Please combine Figures 1 to 6 This application provides a circuit board including a main board 10, a sub-board 20, and a cable 30 electrically connecting the main board 10 and the sub-board 20. The main board 10 includes a first electronic component 11 and a first terminal group 12, and the sub-board 20 includes a second electronic component 21 and a second terminal group 22 electrically connected to the second electronic component 21. The main board 10 and the sub-board 20 are integrally connected, and a break groove 100 is provided between the main board 10 and the sub-board 20. Before soldering, the main board 10 and the sub-board 20 are a single unit and are reflow soldered together; after soldering, the break groove 100 allows the sub-board 20 to be broken relative to the main board 10 (this should be understood as not requiring additional tools, but being able to be broken manually), thereby achieving rapid separation of the two for easy installation in their respective positions (see...). Figure 6 ).
[0022] Optionally, the cable 30 can be detachably plugged into the first terminal group 12 and the second terminal group 22 for quick installation without soldering. When the sub-board is damaged, it can be directly replaced and reconnected, which helps reduce costs and speeds up the replacement process.
[0023] The break groove 100 can be a U-shaped or V-shaped groove in cross-section, or it can be formed into several stamp holes. When the break groove 100 has a U-shaped or V-shaped cross-section, the break groove does not penetrate the thickness direction of the circuit board, i.e., a partial connection is retained; when the break groove 100 is formed into stamp holes, it penetrates the thickness direction of the circuit board. Optionally, the extension of the break groove 100 is a straight line. Figure 3 ) or broken line ( Figure 4 In another embodiment, please combine Figure 5 The circuit board 10 also has an opening 101 located between the main board and the sub-board. The opening 101 divides the break groove 100 into two parts to reduce the area where the main board 10 and the sub-board 20 are connected, thereby ensuring the yield rate during breakage.
[0024] This application also provides a battery pack, which includes the circuit board as described above, wherein the main board 10 is a power control board (including BMS control circuit), the sub-board is a power display board, and the second electronic component 21 includes a power indicator light, which is used to display the remaining power of the battery pack.
[0025] This application also provides a battery pack charger, which includes a circuit board as described above, wherein the main board 10 is a charging control board, and the second electronic component includes a power terminal configured to receive electrical energy from an AC power source.
[0026] This application also provides a power tool, which includes the circuit board as described above, wherein the main board 10 is a tool main control board, the secondary board 20 is a switch control board, and the second electronic component 21 includes a switch controller. The power tool is, for example, any one of the following: electric drill, electric wrench, electric hammer, angle grinder, reciprocating saw, electric chainsaw, lawnmower, etc.
[0027] In this application, the main board and the sub-board can be reflow soldered together before they break, resulting in high soldering efficiency. At the same time, by setting up terminal groups, the cables can be detachably connected to the main board and the sub-board. When the sub-board is damaged, it can be directly replaced, and then the main board and the sub-board can be connected by cables, which helps to reduce costs and speed up replacement.
[0028] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A circuit board, comprising a main board, a sub-board, and cables electrically connecting the main board and the sub-board, characterized in that, The motherboard includes a first electronic component and a first terminal group, and the sub-board includes a second electronic component and a second terminal group electrically connected to the second electronic component. The cable detachably connects the first terminal group and the second terminal group. The motherboard and the sub-board are integrally connected, and a break groove is provided between the motherboard and the sub-board, which allows the sub-board to be broken relative to the motherboard.
2. The circuit board according to claim 1, characterized in that, The extension direction of the break groove is a straight line or a broken line.
3. The circuit board according to claim 1, characterized in that, The circuit board also has an opening located between the main board and the sub-board, which divides the break groove into two parts.
4. The circuit board according to claim 2 or 3, characterized in that, The cross-section of the break groove is V-shaped or U-shaped, and the break groove does not penetrate through the thickness direction of the circuit board.
5. The circuit board according to claim 1, characterized in that, The cable is detachably plugged into the first terminal group and the second terminal group.
6. A battery pack comprising a circuit board as claimed in any one of claims 1-5, wherein the main board is a power control board, and the second electronic component includes a power indicator light.
7. A battery pack charger comprising a circuit board as claimed in any one of claims 1-5, the main board being a charging control board, and the second electronic component including a power terminal configured to receive electrical energy from an AC power source.
8. A power tool comprising a circuit board as claimed in any one of claims 1-5, wherein the main board is a tool control board, and the second electronic component includes a switch controller.