Lithium battery intelligent protection switch with multiple expansion function

Abstract

The utility model relates to a lithium electricity intelligence protection switch with multiple extension function, including casing, fixedly connected in the circuit control board of casing, the push rod module and the reversing module of swing joint on the casing, be connected with a on -board connector on the circuit control board, be equipped with the connecting port of adapting with on -board connector on the casing, on -board connector is inserted in the connecting port, and the interface of on -board connector is exposed in the casing outside, is used for other equipment outside, one end of circuit control board exposes the casing outside, and the circuit control board on the casing outside is equipped with a plurality of through -hole pads, and each through -hole pad is connected control chip on circuit control board respectively, and the through -hole pad is used for external signal source or signal receiving spare. Through the open connection terminal formed by adding on -board connector and a plurality of exposed through -hole pads, can be used for external hall board subassembly, LED lighting lamp, lamp board subassembly and a variety of functional modules, solve the technical problem of traditional switch function single.

Description

Technical Field

[0001] This utility model belongs to the field of electrical switch technology, specifically relating to a lithium battery intelligent protection switch with multiple extended functions. Background Technology

[0002] Currently, the switching systems commonly used in brushless DC power tools on the market consist of three independent modules: a brushless signal switch, a circuit control board (PCBA), and a Hall effect sensor. These modules rely on external wiring harnesses for electrical connections, resulting in a dispersed overall layout, complex assembly processes, and significantly increased manufacturing costs. Multiple connection points and lengthy wiring harnesses not only increase the risk of poor contact and signal interference but also reduce overall reliability and product lifespan. Furthermore, this structure lacks flexible scalability, making it difficult to adapt to customers' diverse functional configuration needs. These problems primarily stem from the low integration level and insufficient modular design of existing technologies, failing to achieve effective integrated management of the various functional units. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lithium battery intelligent protection switch with multiple extended functions, thereby solving the technical problems of traditional switches having single function, complex assembly process, and easy generation of signal interference sources that affect control accuracy.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a lithium battery intelligent protection switch with multiple expansion functions, including a housing, a circuit control board fixedly connected inside the housing, a push rod module and a commutation module movably connected to the housing, a positive terminal and a negative terminal are provided inside the housing, and a speed regulation circuit that cooperates with the push rod module is provided on the circuit control board. The push rod module is used to connect or disconnect the positive terminal and the negative terminal, and is also used to connect to the speed regulation circuit for speed regulation control. The circuit control board is also provided with a commutation circuit, and the commutation module cooperates with the commutation circuit. The circuit control board is provided with a brushless motor drive circuit and is connected to the U-phase terminal, V-phase terminal and W-phase terminal corresponding to the three-phase coils of the motor. The housing has through holes corresponding to the positive, negative, U-phase, V-phase, and W-phase terminals, which extend out of the housing through these holes. The circuit control board also has an onboard connector. The housing has a connection port adapted to the onboard connector, which is inserted into the connection port. The connector's interface is exposed outside the housing for connecting other devices. One end of the circuit control board protrudes outside the housing, and the circuit control board outside the housing has multiple through-hole pads. Each through-hole pad connects to a control chip on the circuit control board and is used to connect to an external signal source or signal receiver.

[0005] As a preferred embodiment, the housing includes a base in the middle and bottom shells and covers on both sides. The positive terminal, negative terminal, U-phase terminal, V-phase terminal and W-phase terminal are all integrally injection molded with the base. The circuit control board is fixedly connected between the base and the bottom shell. One end of the circuit control board with the through-hole pad protrudes outside the base and is embedded in the bottom shell. Each through hole and connection port is respectively opened on the cover. The base is provided with through holes for the onboard connector to pass through. The circuit control board is provided with connection holes adapted to the positive terminal, negative terminal, U-phase terminal, V-phase terminal and W-phase terminal. The positive terminal, negative terminal, U-phase terminal, V-phase terminal and W-phase terminal are inserted into the connection holes one by one and soldered to the circuit control board. The push rod module and the commutation module are respectively connected to the base.

[0006] As a preferred embodiment, a capacitor positioning hole is provided at the end of the base away from the through-hole pad. The capacitors on the circuit control board are correspondingly inserted into the capacitor positioning hole. The end of the base with the capacitor positioning hole protrudes outside the cover. The depth of the capacitor positioning hole is greater than the height of the capacitor, and the top of the capacitor is located inside the capacitor positioning hole.

[0007] As a preferred embodiment, the ends of the positive and negative terminals exposed outside the housing are connected to the positive and negative terminals of the battery clip via wires. The circuit control board is provided with voltage detection leads and / or current detection leads, which extend from the capacitor positioning hole outside the housing and are connected to the detection terminals on the battery clip.

[0008] As a preferred embodiment, the push rod module includes a push rod, a first slider connected to one end of the push rod and slidably connected to the base, and a positive and negative terminal connected and disconnected via a moving contact. The first slider has a protrusion that mates with the moving contact. A speed regulating spring is provided on the side of the first slider facing the circuit control board. A speed regulating hole is provided on the base that matches the sliding stroke of the speed regulating spring. The speed regulating spring passes through the speed regulating hole and connects to the speed regulating circuit on the circuit control board. The reversing module includes a reversing lever rotatably connected to the base and a second slider connected to the reversing lever. The second slider is slidably connected to the base and its sliding direction is parallel to the push rod axis. The reversing lever drives the second slider to slide on the base. A reversing spring is provided on the side of the second slider facing the circuit control board. A reversing hole is provided on the base that matches the sliding stroke of the reversing spring. The reversing spring passes through the reversing hole and connects to the reversing circuit on the circuit control board.

[0009] The beneficial effects of this utility model are as follows: The lithium battery intelligent protection switch of this utility model forms an open connection terminal by adding an onboard connector and multiple exposed through-hole pads, which can be used to connect to various functional modules such as Hall effect board assemblies, LED lighting lamps, and lamp board assemblies. It supports users to flexibly select and configure according to actual applications, realize personalized function customization, and solve the technical problem of the single function of traditional switches. At the same time, this utility model integrates the brushless motor drive circuit, speed regulation circuit, and commutation circuit into the same circuit control board, and integrates the circuit control board into the switch housing, which improves the integration of the switch, reduces external connection lines, thereby simplifying the assembly process of the switch with other components, reducing the impact of external interference on the control signals on the circuit control board, and improving the control accuracy of the circuit control board on the equipment. Attached Figure Description

[0010] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural schematic diagram of the lithium battery intelligent protection switch described in this utility model; Figure 2 This is an exploded view of the lithium battery intelligent protection switch described in this utility model; Figure 3 This is a schematic diagram of the push rod module described in this utility model; Figure 4 This is a schematic diagram of the commutation module described in this utility model; Figure 5 This is a schematic diagram of the back structure of the base described in this utility model; Figures 1-5 Components: 1. Housing; 101. Bottom shell; 102. Base; 103. Cover; 2. Circuit control board; 3. Push rod module; 301. Push rod; 302. First slider; 303. Protrusion; 304. Speed ​​regulating spring; 4. Reversing module; 401. Reversing lever; 402. Second slider; 403. Reversing spring; 5. Positive terminal; 6. Negative terminal; 7. Speed ​​regulating circuit; 8. Reversing circuit; 9. Brushless motor drive circuit 10. U-phase terminal; 11. V-phase terminal; 12. W-phase terminal; 13. Through hole; 14. Onboard connector; 15. Connection port; 16. Through-hole pad; 17. Through hole; 18. Connection hole; 19. Capacitor positioning hole; 20. Capacitor; 21. Wire; 22. Battery clip; 23. Voltage detection lead; 24. Current detection lead; 25. Moving contact; 26. Speed ​​control hole; 27. Reversing hole; 28. Detection terminal. Detailed Implementation

[0011] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings.

[0012] like Figure 1 and Figure 2 The lithium battery smart protection switch with multiple expansion functions shown includes a housing 1, a circuit control board 2 fixedly connected inside the housing 1, a push rod module 3 movably connected to the housing 1, and a commutation module 4. The housing 1 contains a positive terminal 5 and a negative terminal 6. The circuit control board 2 has a speed control circuit 7 that cooperates with the push rod module 3. The push rod module 3 is used to connect or disconnect the positive terminal 5 and the negative terminal 6, and also connects to the speed control circuit 7 for speed control. The circuit control board 2 also has a commutation circuit 8. The commutation module 4 cooperates with the commutation circuit 8. The circuit control board 2 is provided with a brushless motor drive circuit 9 and connected with U-phase terminal 10, V-phase terminal 11 and W-phase terminal 12 corresponding to the three-phase coils of the motor. The housing 1 is provided with through holes 13 corresponding to the positive terminal 5, negative terminal 6, U-phase terminal 10, V-phase terminal 11 and W-phase terminal 12. The positive terminal 5, negative terminal 6, U-phase terminal 10, V-phase terminal 11 and W-phase terminal 12 extend out of the housing 1 through the through holes 13.

[0013] The circuit control board 2 is also connected to an onboard connector 14. The housing 1 has a connection port 15 that is adapted to the onboard connector 14. The onboard connector 14 is inserted into the connection port 15. The interface of the onboard connector 14 is exposed outside the housing 1 for connecting other devices.

[0014] One end of the circuit control board 2 protrudes outside the housing 1, and multiple through-hole pads 16 are provided on the circuit control board located outside the housing 1. Each through-hole pad 16 is connected to the control chip on the circuit control board 2. The through-hole pads 16 are used to connect external signal sources or signal receivers.

[0015] like Figure 2As shown, in this embodiment, the housing 1 includes a base 102 in the middle and a bottom shell 101 and a cover 103 on both sides. The bottom shell 101 is fixedly connected to the base 102 by screws, and the cover 103 is fixedly connected to the base 102 by snap-fit. The positive terminal 5, negative terminal 6, U-phase terminal 10, V-phase terminal 11, and W-phase terminal 12 are all integrally injection molded with the base 102 to ensure stable relative positions. The circuit control board 2 is fixedly connected between the base 102 and the bottom shell 101. One end of the circuit control board 2 with a through-hole pad 16 protrudes from the base 102 and is embedded in the bottom shell 101, forming an expansion port. When the user needs to add functions, they can directly connect to the circuit control board 2 through the through-hole pad 16 on the outside of the housing 1. Each through hole 13 and connection port 15 is respectively opened on the cover 103, so that all the terminals that need to be connected later are concentrated on the front of the housing 1, which facilitates the later assembly and connection of the switch. The base 102 is provided with a through hole 17 for the onboard connector 14 to pass through. The circuit control board 2 is provided with a connection hole 18 that is adapted to the positive terminal 5, negative terminal 6, U-phase terminal 10, V-phase terminal 11 and W-phase terminal 12. The positive terminal 5, negative terminal 6, U-phase terminal 10, V-phase terminal 11 and W-phase terminal 12 are inserted into the connection hole 18 one by one and soldered to the circuit control board 2. The push rod module 3 and the reversing module 4 are respectively connected to the side of the base 102 that is away from the circuit control board 2.

[0016] like Figure 2 As shown, in this preferred embodiment, a capacitor positioning hole 19 is provided at the end of the base 102 away from the through-hole pad 16. The capacitor 20 provided on the circuit control board 2 is correspondingly inserted into the capacitor positioning hole 19. One end of the base 102 with the capacitor positioning hole 19 is exposed outside the cover 103 to improve the heat dissipation effect of the capacitor 20. The depth of the capacitor positioning hole 19 is greater than the height of the capacitor 20. The top of the capacitor 20 is located inside the capacitor positioning hole 19, thereby protecting the capacitor 20 from impact damage.

[0017] like Figure 1 As shown, the positive terminal 5 and the negative terminal 6, with one end protruding from the housing 1, are connected to the positive and negative terminals of the battery clip 22 via wires 21. The circuit control board 2 is provided with voltage detection leads 23 and current detection leads 24. The voltage detection leads 23 and current detection leads 24 extend from the capacitor positioning hole 19 out of the housing 1 and are connected to the detection terminals 28 on the battery clip 22. They are used to detect the working current and operating voltage of the battery pack connected to the battery clip 22, so that the circuit control board 2 can adjust the output mode according to the actual working state of the battery pack and improve the working safety of the battery pack.

[0018] like Figures 3-5As shown, the push rod module 3 in this embodiment includes a push rod 301 and a first slider 302 connected to one end of the push rod 301 and slidably connected to the base 102, as shown. Figure 2 As shown, the positive terminal 5 and the negative terminal 6 are connected and disconnected via the moving contact 25. This connection structure is conventional technology and will not be further described in this embodiment. Refer to the "Moving Contact Module Applied to Power Tool Switches" disclosed in Chinese Utility Model Patent CN110911181A. Figure 3 As shown, the first slider 302 is provided with a protrusion 303 that cooperates with the moving contact 25, and a speed regulating spring 304 is provided on the side of the first slider 302 facing the circuit control board 2, as shown. Figure 5 As shown, the base 102 has a speed regulating hole 26 that matches the sliding stroke of the speed regulating spring 304. The speed regulating spring 304 passes through the speed regulating hole 26 and is connected to the speed regulating circuit 7 on the circuit control board 2.

[0019] like Figure 4 As shown, the reversing module 4 in this embodiment includes a reversing lever 401 rotatably connected to the base 102 and a second slider 402 connected to the reversing lever 401. The second slider 402 is slidably connected to the base 102 and its sliding direction is parallel to the axial direction of the push rod 301. The reversing lever 401 drives the second slider 402 to slide on the base 102. A reversing spring 403 is provided on the side of the second slider 402 facing the circuit control board 2, such as... Figure 5 As shown, the base 102 has a reversing hole 27 that matches the sliding stroke of the reversing spring 403. The reversing spring 403 passes through the reversing hole 27 and is connected to the reversing circuit 8 on the circuit control board 2.

[0020] The working principle of this utility model is as follows: The lithium battery intelligent protection switch of this utility model forms an open expansion port by adding an onboard connector 14 and multiple exposed through-hole pads 16. It can be used to connect various functional modules such as Hall effect board assemblies, LED lighting lamps, and lamp board assemblies, allowing users to flexibly select and configure according to actual applications, realizing personalized function customization, and solving the technical problem of the single function of traditional switches. At the same time, this utility model integrates the brushless motor drive circuit 9, speed regulation circuit 7, and commutation circuit 8 onto the same circuit control board 2, and integrates the circuit control board 2 into the switch housing 1, which improves the integration of the switch, reduces external connection lines, thereby simplifying the assembly process of the switch with other components, reducing the impact of external interference on the control signals on the circuit control board 2, and improving the control accuracy of the circuit control board 2 on the equipment.

[0021] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A lithium battery intelligent protection switch with multiple expansion functions, comprising a housing (1), a circuit control board (2) fixedly connected inside the housing (1), a push rod module (3) movably connected to the housing (1), and a commutation module (4), wherein a positive terminal (5) and a negative terminal (6) are provided inside the housing (1), and a speed regulation circuit (7) cooperating with the push rod module (3) is provided on the circuit control board (2), the push rod module (3) is used to connect or disconnect the positive terminal (5) and the negative terminal (6), and is also used to connect the speed regulation circuit (7) for speed regulation control, and a commutation circuit (8) is also provided on the circuit control board (2), wherein the commutation module (4) cooperates with the commutation circuit (8), characterized in that, The circuit control board (2) is provided with a brushless motor drive circuit (9) and connected with U-phase terminal (10), V-phase terminal (11) and W-phase terminal (12) corresponding to the three-phase coils of the motor. The housing (1) is provided with through holes (13) corresponding to the positive terminal (5), negative terminal (6), U-phase terminal (10), V-phase terminal (11) and W-phase terminal (12). The positive terminal (5), negative terminal (6), U-phase terminal (10), V-phase terminal (11) and W-phase terminal (12) extend out of the housing (1) through the through holes (13). The circuit control board (2) is also connected to an onboard connector (14). The housing (1) has a connection port (15) adapted to the onboard connector (14). The onboard connector (14) is inserted into the connection port (15). The interface of the onboard connector (14) is exposed outside the housing (1) for connecting other devices. One end of the circuit control board (2) protrudes outside the housing (1), and multiple through-hole pads (16) are provided on the circuit control board located outside the housing (1). Each through-hole pad (16) is connected to the control chip on the circuit control board (2). The through-hole pads (16) are used to connect to external signal sources or signal receivers.

2. The lithium battery intelligent protection switch with multiple expansion functions according to claim 1, characterized in that, The housing (1) includes a base (102) in the middle and a bottom shell (101) and a cover (103) on both sides. The positive terminal (5), negative terminal (6), U-phase terminal (10), V-phase terminal (11) and W-phase terminal (12) are all integrally injection molded with the base (102). The circuit control board (2) is fixedly connected between the base (102) and the bottom shell (101). One end of the circuit control board (2) with the through hole pad (16) protrudes outside the base (102) and is embedded in the bottom shell (101). Each through hole (13) and connection port (15) are respectively opened on the cover. On the housing (103), the base (102) is provided with a through hole (17) for the onboard connector (14) to pass through. The circuit control board (2) is provided with a connection hole (18) adapted to the positive terminal (5), negative terminal (6), U-phase terminal (10), V-phase terminal (11) and W-phase terminal (12). The positive terminal (5), negative terminal (6), U-phase terminal (10), V-phase terminal (11) and W-phase terminal (12) are inserted into the connection hole (18) one by one and welded to the circuit control board (2). The push rod module (3) and the reversing module (4) are respectively connected to the base (102).

3. The lithium battery intelligent protection switch with multiple expansion functions according to claim 2, characterized in that, The base (102) has a capacitor positioning hole (19) at one end away from the through hole pad (16). The capacitor (20) on the circuit control board (2) is inserted into the capacitor positioning hole (19). One end of the base (102) with the capacitor positioning hole (19) protrudes outside the cover (103). The depth of the capacitor positioning hole (19) is greater than the height of the capacitor (20). The top of the capacitor (20) is located inside the capacitor positioning hole (19).

4. The lithium battery intelligent protection switch with multiple expansion functions according to claim 3, characterized in that, The positive terminal (5) and the negative terminal (6) are connected to the positive and negative terminals of the battery clip (22) via wires (21) at the ends exposed outside the housing (1). The circuit control board (2) is provided with voltage detection leads (23) and / or current detection leads (24). The voltage detection leads (23) and / or current detection leads (24) extend out of the housing (1) from the capacitor positioning hole (19) and are connected to the detection terminals (28) on the battery clip (22).

5. The lithium battery intelligent protection switch with multiple expansion functions according to claim 2, characterized in that, The push rod module (3) includes a push rod (301), a first slider (302) connected to one end of the push rod (301) and slidably connected to the base (102), the positive terminal (5) and the negative terminal (6) are connected and disconnected through a moving contact (25), the first slider (302) is provided with a protrusion (303) that cooperates with the moving contact (25), the first slider (302) is provided with a speed regulating spring (304) on the side facing the circuit control board (2), the base (102) is provided with a speed regulating hole (26) that cooperates with the sliding stroke of the speed regulating spring (304), the speed regulating spring (304) passes through the speed regulating hole (26) and is connected to the speed regulating circuit (7) on the circuit control board (2); the reversing module (4) The device includes a reversing lever (401) rotatably connected to the base (102) and a second slider (402) connected to the reversing lever (401). The second slider (402) is slidably connected to the base (102) and its sliding direction is parallel to the axial direction of the push rod (301). The reversing lever (401) drives the second slider (402) to slide on the base (102). A reversing spring (403) is provided on the side of the second slider (402) facing the circuit control board (2). A reversing hole (27) adapted to the sliding stroke of the reversing spring (403) is provided on the base (102). The reversing spring (403) passes through the reversing hole (27) and is connected to the reversing circuit (8) on the circuit control board (2).

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