High-voltage self-locking circuit
By combining the logic control module and the high-voltage power supply maintenance module, the problems of complex structure and short service life of the self-locking circuit are solved, and the self-locking circuit is simplified and its lifespan is extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-04-07
AI Technical Summary
Existing self-locking circuits, such as relay self-locking circuits, have short lifespans and their mechanical structures are prone to wear, while transistor self-locking circuits have complex structures and low universality.
The system employs a combination of a logic control module, a conduction module, and a high-voltage power supply maintenance module. The high-voltage power supply maintenance module provides power to enable the logic control module to operate, thereby driving the conduction module to conduct and keep the load operational even after a system power failure.
This simplifies the self-locking circuit structure and extends its service life.
Smart Images
Figure CN224097705U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially, and relates to a high voltage self locking circuit. BACKGROUND
[0002] The battery pack discharges main loop and needs to keep the main loop not to be closed after the system power failure, therefore needs to use the self locking circuit.
[0003] In the related art, the commonly used self locking circuit at present stage is relay self locking circuit and transistor self locking circuit. However, the relay self locking circuit is worn out with the long time frequent use due to the mechanical structure, and the service life is shorter. And the structure of the transistor self locking circuit is more complex, and the universality is lower. UTILITY MODEL CONTENTS
[0004] The utility model discloses a high voltage self locking circuit, can replace relay self locking circuit and transistor self locking circuit, make the self locking circuit structure simplify, still can prolong the service life.
[0005] The utility model discloses a high voltage self locking circuit, can replace relay self locking circuit and transistor self locking circuit, make the self locking circuit structure simplify, still can prolong the service life.
[0006] The utility model discloses a high voltage self locking circuit, can replace relay self locking circuit and transistor self locking circuit, make the self locking circuit structure simplify, still can prolong the service life.
[0007] The logic main control module includes resistance R9158, NMOS transistor U9062, photoelectric coupler U9077, NMOS transistor U9022, resistance R9156 and gate drive chip U9026, the resistance R9158 is connected with NMOS transistor U9062, the photoelectric coupler U9077 is connected with NMOS transistor U9062, NMOS transistor U9022 is connected with photoelectric coupler U9077, the first end of resistance R9156 is connected with NMOS transistor U9022, the second end of resistance R9156 is connected with gate drive chip U9026.
[0008] The logic main control module also includes capacitor C9026 and capacitor C9025, the first end of capacitor C9026 is connected with gate drive chip U9026, the second end of capacitor C9026 is grounded, the first end of capacitor C9025 is connected with gate drive chip U9026, the second end of capacitor C9025 is grounded.
[0009] The switch unit includes NMOS tube U9015, NMOS tube U9016, NMOS tube U9017, NMOS tube U9018, NMOS tube U9019 and diode ZD9012, the first end of the NMOS tube U9015 is electrically connected to the load, the second end of the NMOS tube U9015 is electrically connected to the first end of the NMOS tube U9016, the second end of the NMOS tube U9016 is electrically connected to the load, the first end of the NMOS tube U9016 is also electrically connected to the first end of the NMOS tube U9017, the second end of the NMOS tube U9017 is electrically connected to the load, the first end of the NMOS tube U9017 is also electrically connected to the first end of the NMOS tube U9018, the second end of the NMOS tube U9018 is electrically connected to the load, the first end of the NMOS tube U9018 is electrically connected to the first end of the NMOS tube U9019, the second end of the NMOS tube U9019 is electrically connected to the load, the third end of the NMOS tube U9019 is electrically connected to the first end of the diode ZD9012, and the second end of the diode ZD9012 is electrically connected to the gate drive chip U9026.
[0010] The high-voltage power supply maintenance module includes a first input end, a second input end, a magnetic bead FB9004, a magnetic bead FB9002, a magnetic bead FB9003 and a magnetic bead FB9005, the first end of the magnetic bead FB9004 is electrically connected to the first end of the magnetic bead FB9002, the second end of the magnetic bead FB9004 is electrically connected to the second end of the magnetic bead FB9002, the first end of the magnetic bead FB9002 is electrically connected to the first input end, the first end of the magnetic bead FB9003 is electrically connected to the first end of the magnetic bead FB9005, the second end of the magnetic bead FB9003 is electrically connected to the second end of the magnetic bead FB9005, and the first end of the magnetic bead FB9005 is electrically connected to the second input end.
[0011] The high-voltage power supply maintenance module further includes a capacitor C9016, a capacitor C90008, a capacitor C9038 and a capacitor C9043, the first end of the capacitor C9016 is electrically connected to the second end of the magnetic bead FB9002, the second end of the capacitor C9016 is electrically connected to the first end of the capacitor C90008, the second end of the capacitor C90008 is electrically connected to the first end of the capacitor C9038, the second end of the capacitor C9038 is electrically connected to the first end of the capacitor C9043, and the second end of the capacitor C9043 is electrically connected to the second end of the magnetic bead FB9005.
[0012] The high-voltage power supply maintaining module further comprises a resistor R9037, a resistor R9038, a resistor R9039 and a resistor R9040, a first end of the resistor R9037 is electrically connected with a first end of the capacitor C9016, a second end of the resistor R9038 is electrically connected with a first end of the resistor R9038, the second end of the resistor R9038 is electrically connected with a first end of the resistor R9039, a second end of the resistor R9039 is electrically connected with a first end of the resistor R9040, and a second end of the resistor R9040 is electrically connected with a second end of the capacitor C9043.
[0013] The high-voltage power supply maintaining module further comprises a chip U9011 and a diode D9001, the chip U9011 is electrically connected with a second end of the magnetic bead FB9002 and a second end of the magnetic bead FB9005 respectively, a first end of the diode D9001 is electrically connected with the chip U9011, and a second end of the diode D9001 is electrically connected with the gate drive chip U9026.
[0014] The high-voltage power supply maintaining module further comprises a resistor R9083, an NMOS transistor U9057 and a photoelectric coupler U9058, the resistor R9083 is electrically connected with a first end of the NMOS transistor U9057, and a second end of the NMOS transistor U9057 is electrically connected with the photoelectric coupler U9058.
[0015] The high-voltage power supply maintaining module further comprises an NMOS transistor U9056, a photoelectric coupler U9031 and a resistor R9075, a first end of the NMOS transistor U9056 is electrically connected with the photoelectric coupler U9058, a second end of the NMOS transistor U9056 is electrically connected with the photoelectric coupler U9031, a first end of the resistor R9075 is electrically connected with the photoelectric coupler U9031, and a second end of the resistor R9075 is electrically connected with the chip U9011.
[0016] Compared with the prior art, the utility model has at least the following advantages:
[0017] The logic main control module, the conduction module and the high-voltage power supply maintaining module are combined, the high-voltage power supply maintaining module provides the power supply and makes the logic main control module work, then drives the conduction module to conduct, so that the load still keeps working after the system power failure. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment.
[0019] Figure 1 The function module diagram of the high-voltage self-locking circuit in an embodiment of the utility model;
[0020] Figure 2 The circuit diagram of the logic control module in an embodiment of the utility model;
[0021] Figure 3 The circuit diagram of the conduction module in an embodiment of the utility model;
[0022] Figure 4 The circuit diagram of the high-voltage power supply maintaining module in an embodiment of the utility model. DETAILED DESCRIPTION
[0023] Embodiments of the present application will be described in more detail by referring to the drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application is fully conveyed to those skilled in the art.
[0024] It should be understood that although the terms "first", "second", "third", etc. are used to describe various information in the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.
[0025] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0026] The commonly used self-locking circuit at present is a relay self-locking circuit and a transistor self-locking circuit. However, the relay self-locking circuit has a short service life due to its mechanical structure, and the contact will wear out after long-term frequent use. The structure of the transistor self-locking circuit is relatively complex, and the universality is low.
[0027] In view of the above problems, the embodiment of the present application provides a high-voltage self-locking circuit which can replace the relay self-locking circuit and the transistor self-locking circuit, so that the self-locking circuit structure is simplified and the service life is prolonged.
[0028] The technical solutions of the embodiment of the present application are described in detail below with reference to the drawings.
[0029] Please refer to Figure 1 The high-voltage self-locking circuit comprises a logic main control module 100, a conduction module 200 and a high-voltage power supply maintaining module 300. The conduction module 200 comprises a plurality of switch units, and each switch unit is electrically connected with the logic main control module 100. The high-voltage power supply maintaining module 300 is electrically connected with the logic main control module 100.
[0030] It should be noted that the high-voltage power supply maintaining module 300 is used to provide a driving voltage to the logic main control module 100, so that the logic main control module 100 starts to work. After the logic main control module 100 starts to work, a high level is input to the plurality of switch units, so that the plurality of switch units are turned on, thereby the load can still work after the system is powered off.
[0031] Please refer to Figure 2 In an embodiment, the logic main control module 100 comprises a resistor R9158, an NMOS transistor U9062, an optoelectronic coupler U9077, an NMOS transistor U9022, a resistor R9156 and a gate drive chip U9026. The resistor R9158 is electrically connected with the NMOS transistor U9062. The optoelectronic coupler U9077 is electrically connected with the NMOS transistor U9062. The NMOS transistor U9022 is electrically connected with the optoelectronic coupler U9077. A first end of the resistor R9156 is electrically connected with the NMOS transistor U9022. A second end of the resistor R9156 is electrically connected with the gate drive chip U9026.
[0032] It should be noted that the resistor R9158 is connected with an external controller. The controller generates a signal through the resistor R9158, the NMOS transistor U9062, the optoelectronic coupler U9077, the NMOS transistor U9022, the resistor R9156 to the gate drive chip U9026, so that the gate drive chip U9026 turns on the plurality of switch units. The NMOS transistor U9062 and the NMOS transistor U9022 play the role of switch, the optoelectronic coupler U9077 plays the role of signal isolation, and the resistor R9158 and the resistor R9156 are both voltage dividing resistors.
[0033] Please refer to Figure 1In an embodiment, the logic control module 100 further comprises a capacitor C9026 and a capacitor C9025, a first end of the capacitor C9026 is electrically connected with the gate drive chip U9026, a second end of the capacitor C9026 is grounded, a first end of the capacitor C9025 is electrically connected with the gate drive chip U9026, a second end of the capacitor C9025 is grounded.
[0034] It should be noted that the capacitor C9026 and the capacitor C9025 are both filter capacitors, which are used to filter out the ripples in the circuit.
[0035] Please refer to Figure 3 In an embodiment, the switch unit comprises an NMOS U9015, an NMOS U9016, an NMOS U9017, an NMOS U9018, an NMOS U9019 and a diode ZD9012, a first end of the NMOS U9015 is electrically connected with a load, a second end of the NMOS U9015 is electrically connected with a first end of the NMOS U9016, a second end of the NMOS U9016 is electrically connected with a load, the first end of the NMOS U9016 is further electrically connected with a first end of the NMOS U9017, a second end of the NMOS U9017 is electrically connected with a load, the first end of the NMOS U9017 is further electrically connected with a first end of the NMOS U9018, a second end of the NMOS U9018 is electrically connected with a load, the first end of the NMOS U9018 is electrically connected with a first end of the NMOS U9019, a second end of the NMOS U9019 is electrically connected with a load, a third end of the NMOS U9019 is electrically connected with a first end of the diode ZD9012, a second end of the diode ZD9012 is electrically connected with the gate drive chip U9026.
[0036] It should be noted that the diode ZD9012 is a voltage stabilizing diode, the NMOS U9015, the NMOS U9016, the NMOS U9017, the NMOS U9018 and the NMOS U9019 all play the role of switch and are turned on at high level.
[0037] Please refer to Figure 4In an embodiment, the high-voltage power maintaining module 300 comprises a first input end, a second input end, a magnetic bead FB9004, a magnetic bead FB9002, a magnetic bead FB9003, and a magnetic bead FB9005. The first end of the magnetic bead FB9004 is electrically connected to the first end of the magnetic bead FB9002. The second end of the magnetic bead FB9004 is electrically connected to the second end of the magnetic bead FB9002. The first end of the magnetic bead FB9002 is electrically connected to the first input end. The first end of the magnetic bead FB9003 is electrically connected to the first end of the magnetic bead FB9005. The second end of the magnetic bead FB9003 is electrically connected to the second end of the magnetic bead FB9005. The first end of the magnetic bead FB9005 is electrically connected to the second input end.
[0038] It should be noted that the first input end V270_P+_DIS and the second input end V270_B- are both 270V high-voltage inputs. The magnetic bead FB9004, the magnetic bead FB9002, the magnetic bead FB9003, and the magnetic bead FB9005 serve to suppress electromagnetic interference and decouple the power supply.
[0039] Please refer to Figure 4 In an embodiment, the high-voltage power maintaining module 300 further comprises a capacitor C9016, a capacitor C90008, a capacitor C9038, and a capacitor C9043. The first end of the capacitor C9016 is electrically connected to the second end of the magnetic bead FB9002. The second end of the capacitor C9016 is electrically connected to the first end of the capacitor C90008. The second end of the capacitor C90008 is electrically connected to the first end of the capacitor C9038. The second end of the capacitor C9038 is electrically connected to the first end of the capacitor C9043. The second end of the capacitor C9043 is electrically connected to the second end of the magnetic bead FB9005. Specifically, the high-voltage power maintaining module 300 further comprises a resistor R9037, a resistor R9038, a resistor R9039, and a resistor R9040. The first end of the resistor R9037 is electrically connected to the first end of the capacitor C9016. The second end of the resistor R9038 is electrically connected to the first end of the resistor R9038. The second end of the resistor R9038 is electrically connected to the first end of the resistor R9039. The second end of the resistor R9039 is electrically connected to the first end of the resistor R9040. The second end of the resistor R9040 is electrically connected to the second end of the capacitor C9043.
[0040] It should be noted that the capacitor C9016, the capacitor C90008, the capacitor C9038, the capacitor C9043, and the resistor R9037, the resistor R9038, the resistor R9039, and the resistor R9040 constitute a filter circuit for filtering out ripples in the circuit.
[0041] Please refer to Figure 4In an embodiment, the high-voltage power supply maintaining module 300 further comprises a chip U9011 and a diode D9001, the chip U9011 is electrically connected with the second end of the magnetic bead FB9002 and the second end of the magnetic bead FB9005 respectively, the first end of the diode D9001 is electrically connected with the chip U9011, and the second end of the diode D9001 is electrically connected with the gate drive chip U9026.
[0042] It should be noted that the chip U9011 is a voltage reduction chip, which is used to reduce 270V to 15V, and the diode D9001 plays a role of protecting the circuit.
[0043] Please refer to Figure 4 In an embodiment, the high-voltage power supply maintaining module 300 further comprises a resistor R9083, an NMOS transistor U9057 and a photoelectric coupler U9058, the resistor R9083 is electrically connected with the first end of the NMOS transistor U9057, and the second end of the NMOS transistor U9057 is electrically connected with the photoelectric coupler U9058. Specifically, the high-voltage power supply maintaining module further comprises an NMOS transistor U9056, a photoelectric coupler U9031 and a resistor R9075, the first end of the NMOS transistor U9056 is electrically connected with the photoelectric coupler U9058, the second end of the NMOS transistor U9056 is electrically connected with the photoelectric coupler U9031, the first end of the resistor R9075 is electrically connected with the photoelectric coupler U9031, and the second end of the resistor R9075 is electrically connected with the chip U9011.
[0044] It should be noted that this part of the circuit is to artificially control the input of the first input end and the second input end when the main loop is not powered off. Among them, the resistor R9083 and the resistor R9075 are voltage dividing resistors, the NMOS transistor U9057 and the NMOS transistor U9056 play a role of switch, and the photoelectric coupler U9058 is used to isolate this part of the circuit from the chip U9011.
[0045] The circuit principle of the present application will be described below:
[0046] After the main circuit is powered off, the high-voltage isolation power supply inputs 270V through the first input end and the second input end, and after the 270V passes through the magnetic beads FB9004, the magnetic beads FB9002, the magnetic beads FB9003 and the magnetic beads FB9005, reaches the capacitor C9016, the capacitor C90008, the capacitor C9038, the capacitor C9043, the resistor R9037, the resistor R9038, the resistor R9039 and the resistor R9040 for filtering, and after the 15V output by the chip U9011 is stepped down, the 15V is output to the eighth pin of the gate drive chip U9026, so that the gate drive chip U9026 is turned on and works. Then the external controller sends a signal to the second and third pins of the gate drive chip U9026 through the DSG270_CTRL-M, so that the gate drive chip U9026 outputs a high level, and the NMOS tube U9015, the NMOS tube U9016, the NMOS tube U9017, the NMOS tube U9018 and the NMOS tube U9019 are turned on, so that the load continues to work after being powered off.
[0047] The solutions of the present application have been described in detail above with reference to the drawings. In the above-described embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. It should also be known by those skilled in the art that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device embodiments of the present application can be combined, divided and reduced according to actual needs.
[0048] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications or improvements to the technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.
Claims
1. A high-voltage self-locking circuit, characterized in that, include: Logic control module; The conduction module includes several switching units, each of which is electrically connected to the logic main control module. The logic main control module includes a resistor R9158, an NMOS transistor U9062, an optocoupler U9077, an NMOS transistor U9022, a resistor R9156, and a gate driver chip U9026. The resistor R9158 is electrically connected to the NMOS transistor U9062, the optocoupler U9077 is electrically connected to the NMOS transistor U9062, the NMOS transistor U9022 is electrically connected to the optocoupler U9077, the first end of the resistor R9156 is electrically connected to the NMOS transistor U9022, and the second end of the resistor R9156 is electrically connected to the gate driver chip U9026. The high-voltage power supply maintenance module is electrically connected to the logic main control module.
2. The high-voltage self-locking circuit according to claim 1, characterized in that, The logic main control module also includes capacitors C9026 and C9025. The first end of capacitor C9026 is electrically connected to the gate driver chip U9026, and the second end of capacitor C9026 is grounded. The first end of capacitor C9025 is electrically connected to the gate driver chip U9026, and the second end of capacitor C9025 is grounded.
3. The high-voltage self-locking circuit according to claim 1 or 2, characterized in that, The switching unit includes NMOS transistors U9015, U9016, U9017, U9018, and U9019, and diode ZD9012. The first terminal of NMOS transistor U9015 is used for load electrical connection, and the second terminal of NMOS transistor U9015 is electrically connected to the first terminal of NMOS transistor U9016. The second terminal of NMOS transistor U9016 is also used for load electrical connection, and the first terminal of NMOS transistor U9016 is also electrically connected to the first terminal of NMOS transistor U9017. The NMOS transistor U9015... The second terminal of 17 is used for load electrical connection. The first terminal of the NMOS transistor U9017 is also electrically connected to the first terminal of the NMOS transistor U9018. The second terminal of the NMOS transistor U9018 is used for load electrical connection. The first terminal of the NMOS transistor U9018 is electrically connected to the first terminal of the NMOS transistor U9019. The second terminal of the NMOS transistor U9019 is used for load electrical connection. The third terminal of the NMOS transistor U9019 is electrically connected to the first terminal of the diode ZD9012. The second terminal of the diode ZD9012 is electrically connected to the gate driver chip U9026.
4. The high-voltage self-locking circuit according to claim 1 or 2, characterized in that, The high-voltage power supply maintenance module includes a first input terminal, a second input terminal, ferrite beads FB9004, FB9002, FB9003, and FB9005. The first end of ferrite bead FB9004 is electrically connected to the first end of ferrite bead FB9002, the second end of ferrite bead FB9004 is electrically connected to the second end of ferrite bead FB9002, the first end of ferrite bead FB9002 is electrically connected to the first input terminal, the first end of ferrite bead FB9003 is electrically connected to the first end of ferrite bead FB9005, the second end of ferrite bead FB9003 is electrically connected to the second end of ferrite bead FB9005, and the first end of ferrite bead FB9005 is electrically connected to the second input terminal.
5. The high-voltage self-locking circuit according to claim 4, characterized in that, The high-voltage power supply maintenance module further includes capacitors C9016, C90008, C9038, and C9043. The first terminal of capacitor C9016 is electrically connected to the second terminal of the ferrite bead FB9002. The second terminal of capacitor C9016 is electrically connected to the first terminal of capacitor C90008. The second terminal of capacitor C90008 is electrically connected to the first terminal of capacitor C9038. The second terminal of capacitor C9038 is electrically connected to the first terminal of capacitor C9043. The second terminal of capacitor C9043 is electrically connected to the second terminal of the ferrite bead FB9005.
6. The high-voltage self-locking circuit according to claim 5, characterized in that, The high-voltage power supply maintenance module further includes resistors R9037, R9038, R9039, and R9040. The first end of resistor R9037 is electrically connected to the first end of capacitor C9016. The second end of resistor R9038 is electrically connected to the first end of resistor R9038. The second end of resistor R9038 is electrically connected to the first end of resistor R9039. The second end of resistor R9039 is electrically connected to the first end of resistor R9040. The second end of resistor R9040 is electrically connected to the second end of capacitor C9043.
7. The high-voltage self-locking circuit according to claim 5, characterized in that, The high-voltage power supply maintenance module also includes a chip U9011 and a diode D9001. The chip U9011 is electrically connected to the second terminal of the magnetic bead FB9002 and the second terminal of the magnetic bead FB9005, respectively. The first terminal of the diode D9001 is electrically connected to the chip U9011, and the second terminal of the diode D9001 is electrically connected to the gate driver chip U9026.
8. The high-voltage self-locking circuit according to claim 7, characterized in that, The high-voltage power supply maintenance module also includes a resistor R9083, an NMOS transistor U9057, and an optocoupler U9058. The resistor R9083 is electrically connected to the first terminal of the NMOS transistor U9057, and the second terminal of the NMOS transistor U9057 is electrically connected to the optocoupler U9058.
9. The high-voltage self-locking circuit according to claim 8, characterized in that, The high-voltage power supply maintenance module also includes an NMOS transistor U9056, an optocoupler U9031, and a resistor R9075. The first terminal of the NMOS transistor U9056 is electrically connected to the optocoupler U9058, the second terminal of the NMOS transistor U9056 is electrically connected to the optocoupler U9031, the first terminal of the resistor R9075 is electrically connected to the optocoupler U9031, and the second terminal of the resistor R9075 is electrically connected to the chip U9011.