CN223729469U - BMS power supply control system and circuit protection board - Google Patents
BMS power supply control system and circuit protection boardInfo
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- CN223729469U CN223729469U CN202423171241.0U CN202423171241U CN223729469U CN 223729469 U CN223729469 U CN 223729469U CN 202423171241 U CN202423171241 U CN 202423171241U CN 223729469 U CN223729469 U CN 223729469U
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Abstract
The application provides a BMS power supply control system which mainly comprises a BMS controller, a first switch, a second switch, a DC/DC module, a main power supply circuit, a switching circuit, a backup battery and a charging awakening circuit. The BMS controller can transmit a control signal to the first switch and can also transmit a control signal to the second switch. One end of the first switch is connected to the positive electrode of the battery pack, one end of the second switch is connected to the positive electrode of the charging port, and output ends of the first switch and the second switch are connected to the DC/DC module. The DC/DC module is connected to the main power circuit. The main power supply circuit supplies power to the BMS system through the switching circuit, and meanwhile, the switching circuit is also connected with the backup battery. The backup battery provides backup power when the system is operating normally. When the BMS system is in a dormant state, the charging wake-up circuit can wake up the BMS system, so that the system can be ensured to resume working at any time. The application can flexibly switch various power supply modes, and effectively protects the battery core, thereby prolonging the service life of the battery core.
Description
Technical Field
The application relates to the technical field of energy storage batteries, in particular to a BMS power supply control system and a circuit protection board.
Background
With the development of technology and the improvement of living standard of people, energy storage type electronic products are more and more popular with consumers, and portable outdoor energy storage power supplies are most popular with consumers. People carry out outdoor camping in leisure time, an outdoor power supply is particularly important at the moment, and the outdoor power supply can meet the power supply requirements of a plurality of electric appliances such as electric kettles, cooking by an electromagnetic oven and the like for charging daily electronic equipment of people, so that the quality of the outdoor camping of people is improved. However, due to different camping time and different electric appliances, the embarrassing problem exists, and the outdoor power supply with too small capacity can cause anxiety of electricity consumption, and the outdoor power supply with too large capacity is too heavy and inconvenient to carry. At this time, a method is needed to make the energy storage power supply meet the requirements of different use conditions.
Disclosure of utility model
In order to solve the technical problems, the application provides a BMS power supply control system, a circuit and a circuit protection board
The application provides a BMS power supply control system, which is characterized by comprising a BMS controller, a first switch, a second switch, a DC/DC module, a main power circuit, a switching circuit, a backup battery and a charging awakening circuit, wherein the first switch is connected with the first switch;
The BMS controller may send a first control signal to the one switch, and the BMS controller may also send a second control signal to the second switch;
The first switch input end is connected with the battery pack positive electrode of the BMS system, the second switch is connected with the charging port positive electrode of the BMS system, and the first switch output end and the second switch output end are connected with the DC/DC module; the DC/DC module is connected with the main power supply circuit, the main power supply circuit is connected with the switching circuit, the backup battery is also connected with the switching circuit, the switching circuit supplies power to the whole BMS system, and the charging awakening circuit is used for awakening the BMS system when the BMS system is in a dormant state.
By the cooperation of the first switch and the second switch, the system is able to switch the power supply mode between different operating states. The flexibility can select the most suitable power supply mode according to different requirements, so that stability and high efficiency of the BMS system under various working conditions are ensured.
Through reasonable power switching strategy, can avoid the electric core to work under unnecessary high load, effectively reduce the battery loss, reduce the decay rate of battery to the life of extension electric core.
The continuous power supply of the system is ensured, namely the combination of the switching circuit and the backup battery ensures that the backup battery can continuously provide power for the BMS system when the main power supply fails or the system is in a dormant state, so that the system is prevented from losing function at key time, and the reliability of the system is improved.
When the BMS system enters a sleep state, the charging wake-up circuit can wake up the system in time, ensure that the system can resume normal work when needed, and promote the intelligent management and automation level of the system.
Further, the first switch includes:
The base electrode of the MOS tube Q3 is connected with the BMS controller through a resistor R10, the source electrode of the MOS tube Q3 is grounded, the drain electrode of the MOS tube Q3 is connected with the anode of a diode D5, the cathode of the diode D5 is connected with a first direct current power supply, a first switch optocoupler is connected with the diode D5 in parallel, the input end of the first switch optocoupler is connected with the anode of the charging port, and the output end of the first switch optocoupler is connected with the DC/DC module.
Further, the second switch includes:
The base electrode of the MOS tube Q4 is connected with the BMS controller through a resistor R11, the source electrode of the MOS tube Q4 is grounded, the drain electrode of the MOS tube Q4 is connected with the anode of a diode D6, the cathode of the diode D6 is connected with a second direct current power supply, a second switch optocoupler is connected with the diode D6 in parallel, the input end of the second switch optocoupler is connected with the anode of the charging port, and the output end of the second switch optocoupler is connected with the DC/DC module.
In the first switch, the combination of the MOS tube Q3 and the diode D5 can effectively control the current flow direction, and meanwhile, the reverse flow of the current is prevented, so that the damage to the battery pack and other circuits is avoided.
In the second switch, the matching design of the MOS transistor Q4 and the diode D6 can also provide current control, and ensure that current only flows in a preset direction, so that the safety and stability of the system are further improved.
Through the switch control of MOS pipe and the feedback mechanism of opto-coupler, first switch and second switch can respond the control signal of BMS controller more fast, realize accurate power switch and management.
The use of the optocoupler enables electrical isolation to be achieved, so that the anti-interference capability and the protection capability of the system are improved, and control failure caused by high voltage or current fluctuation is avoided.
Further, the DC/DC module comprises a DC-DC chip, wherein the DC-DC chip comprises a Vi+ port, a Vi-port, a +Vo port and a 0V port, the Vi+ port is connected with the first switch and the second switch, the Vi-port is connected with a cathode of a charging port, the +Vo port is connected with the main power circuit, and the 0V port is grounded.
In this design, the DC/DC module plays a vital role in converting high voltage direct current (usually from a battery pack or an external power source) into low voltage 12V direct current through buck conversion, providing stable power support for the entire Battery Management System (BMS). In particular, the design of the DC/DC module is not only simple voltage conversion, but also involves a plurality of key functions such as power isolation, protection and driving, so as to ensure that the BMS system can safely and efficiently operate in a complex electrical environment.
Further, the main power supply circuit comprises a buck chip, wherein the buck chip comprises a Vin port and a Vout port, the Vin port is connected with the DC/DC module, and the Vout port is connected with the switching circuit.
In BMS, the design of the main power supply is critical, especially for core control units such as MCUs (micro control units), the stability of the power supply directly affects the reliability and response capability of the system.
Further, the switching circuit includes:
The drain electrode of the MOS tube Q2 is connected with the power supply end of the BMS system, the base electrode of the MOS tube Q2 is connected with the main power supply circuit and the anode of the diode D3, the MOS tube is grounded through a resistor R6, the source electrode of the MOS tube Q2 is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the backup battery, and the cathode of the diode D3 is connected with the power supply end of the BMS system.
The switching circuit is matched with the diodes D2 and D3 through the MOS tube Q2, so that automatic switching can be effectively performed between the main power supply and the backup battery, and the BMS system can still provide power through the backup battery when the main power supply fails. The voltage division effect of the resistor R6 ensures the switch control of the MOS tube, so that the whole circuit can work stably under different power supply states.
Further, the charging wake-up circuit further comprises a1 port of the optocoupler U1 connected with the positive electrode of the charging port through a plurality of resistors, a2 port of the optocoupler U1 connected with the negative electrode of the charging port, a resistor R9 connected between the 1 port and the 2 port of the optocoupler U1, a drain electrode of the MOS tube Q1 connected with an anode of the diode D1 through the resistor R1, a source electrode of the MOS tube Q1 connected with an anode of the diode D4 through the resistor R3 and the resistor R5, a source electrode of the MOS tube Q1 connected with a power supply end of the BMS system, a base electrode of the MOS tube Q1 connected with the resistor R5, a cathode of the diode D1 connected with a processor in the BMS system, a cathode of the diode D4 connected with a 3 port of the optocoupler U1, and a 4 port of the optocoupler U1 connected with ground.
When the charging wake-up circuit detects that voltage exists between the charging positive electrode terminal and the charging negative electrode terminal, a high-level signal is generated and output to the wake-up processor MCU in the BMS, so that the processor MCU in the BMS is waken up.
In a second aspect, the present application proposes a circuit protection board to which the BMS power supply control system according to the first aspect is applied.
In summary, the application provides a BMS power supply control system, which mainly comprises a BMS controller, a first switch, a second switch, a DC/DC module, a main power supply circuit, a switching circuit, a backup battery and a charging wake-up circuit. The BMS controller can transmit a control signal to the first switch and can also transmit a control signal to the second switch. One end of the first switch is connected to the positive electrode of the battery pack, one end of the second switch is connected to the positive electrode of the charging port, and output ends of the first switch and the second switch are connected to the DC/DC module. The DC/DC module is connected to the main power circuit. The main power supply circuit supplies power to the BMS system through the switching circuit, and meanwhile, the switching circuit is also connected with the backup battery. The backup battery provides backup power when the system is operating normally. When the BMS system is in a dormant state, the charging wake-up circuit can wake up the BMS system, so that the system can be ensured to resume working at any time.
Compared with the prior art, the application has at least the following beneficial effects:
The application can flexibly switch various power supply modes, and achieves the aim of effectively protecting the battery cell, thereby prolonging the service life of the battery cell. The device comprises a DC/DC module, a main power supply circuit, a switching circuit, a backup battery and a charging wake-up circuit;
Drawings
Fig. 1 is a block diagram of a BMS power supply control system according to an embodiment of the present application.
Fig. 2 is a first switching circuit diagram illustrating an embodiment of the present application.
Fig. 3 is a first switching circuit diagram illustrating an embodiment of the present application.
Fig. 4 is a circuit diagram of a DC/DC module shown in an embodiment of the present application.
Fig. 5 is a circuit diagram of a main power supply circuit shown in an embodiment of the present application.
Fig. 6 is a circuit diagram of a switching circuit shown in an embodiment of the present application.
Fig. 7 is a circuit diagram of a charge wakeup circuit according to an embodiment of the present application.
Fig. 8 is a BMS power supply flowchart illustrating an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Embodiment one:
As shown in fig. 1, the application provides a BMS power supply control system, which is characterized by comprising a BMS controller, a first switch, a second switch, a DC/DC module, a main power circuit, a switching circuit, a backup battery and a charging wake-up circuit;
The BMS controller may send a first control signal to the one switch, and the BMS controller may also send a second control signal to the second switch;
The first switch input end is connected with the battery pack positive electrode of the BMS system, the second switch is connected with the charging port positive electrode of the BMS system, and the first switch output end and the second switch output end are connected with the DC/DC module; the DC/DC module is connected with the main power supply circuit, the main power supply circuit is connected with the switching circuit, the backup battery is also connected with the switching circuit, the switching circuit supplies power to the whole BMS system, and the charging awakening circuit is used for awakening the BMS system when the BMS system is in a dormant state.
By the cooperation of the first switch and the second switch, the system is able to switch the power supply mode between different operating states. The flexibility can select the most suitable power supply mode according to different requirements, so that stability and high efficiency of the BMS system under various working conditions are ensured.
Through reasonable power switching strategy, can avoid the electric core to work under unnecessary high load, effectively reduce the battery loss, reduce the decay rate of battery to the life of extension electric core.
The continuous power supply of the system is ensured, namely the combination of the switching circuit and the backup battery ensures that the backup battery can continuously provide power for the BMS system when the main power supply fails or the system is in a dormant state, so that the system is prevented from losing function at key time, and the reliability of the system is improved.
When the BMS system enters a sleep state, the charging wake-up circuit can wake up the system in time, ensure that the system can resume normal work when needed, and promote the intelligent management and automation level of the system.
In an embodiment of the present utility model, optionally, as shown in fig. 2, the first switch includes:
The base electrode of the MOS tube Q3 is connected with the BMS controller through a resistor R10, the source electrode of the MOS tube Q3 is grounded, the drain electrode of the MOS tube Q3 is connected with the anode of a diode D5, the cathode of the diode D5 is connected with a first direct current power supply, a first switch optocoupler is connected with the diode D5 in parallel, the input end of the first switch optocoupler is connected with the anode of the charging port, and the output end of the first switch optocoupler is connected with the DC/DC module.
In the embodiment of the utility model, when the BMS controller outputs a signal to turn on the MOS transistor Q3, current flows to the first dc power supply through the diode D5 to supply power to the subsequent circuit. At this time, the working state of the optocoupler is controlled by the voltage signal of the charging port, and the work of the DC/DC module is further regulated. The optocoupler provides electrical isolation to ensure that the charge port signal does not directly affect other parts of the circuit.
Through the cooperation, the whole circuit can control the start and stop of the DC/DC module when the charging voltage arrives, thereby realizing the efficient management and circuit protection of the power supply
In an embodiment of the present utility model, optionally, as shown in fig. 3, the second switch includes:
The base electrode of the MOS tube Q4 is connected with the BMS controller through a resistor R11, the source electrode of the MOS tube Q4 is grounded, the drain electrode of the MOS tube Q4 is connected with the anode of a diode D6, the cathode of the diode D6 is connected with a second direct current power supply, a second switch optocoupler is connected with the diode D6 in parallel, the input end of the second switch optocoupler is connected with the anode of the charging port, and the output end of the second switch optocoupler is connected with the DC/DC module.
In the embodiment of the utility model, when the BMS controller outputs a signal to turn on the MOS transistor Q4, current flows to the first dc power supply through the diode D6 to supply power to the subsequent circuit. At this time, the working state of the optocoupler is controlled by the voltage signal of the charging port, and the work of the DC/DC module is further regulated. The optocoupler provides electrical isolation to ensure that the charge port signal does not directly affect other parts of the circuit.
In the embodiment of the utility model, as shown in fig. 4, optionally, the DC/DC module includes a DC-DC chip, where the DC-DC chip includes a vi+ port, a Vi-port, a +vo port and a 0V port, the vi+ port is connected to the first switch and the second switch, the Vi-port is connected to a negative electrode of a charging port, the +vo port is connected to the main power circuit, and the 0V port is grounded.
In the embodiment of the utility model, optionally, the chip used in the DC-DC chip is a PV40-27B12, jin Shengyang switch power module, and converts high-voltage direct current into isolated low-voltage 12V, but is not limited thereto.
The DC/DC chip converts an input voltage (controlled by the first switch and the second switch) into a stable output voltage, and provides the input voltage through vi+ and Vi-ports, and the output voltage is supplied to the main power circuit through +vo and 0V ports. The first switch and the second switch are used for controlling whether the voltage can enter the DC/DC module or not, so that power management is realized. In this way, the DC/DC module can effectively provide the required stable power supply for the system.
In the embodiment of the utility model, as shown in fig. 5, optionally, the main power supply circuit comprises a buck chip, wherein the buck chip comprises a Vin port and a Vout port, the Vin port is connected with the DC/DC module, and the Vout port is connected with the switching circuit.
In the embodiment of the utility model, optionally, the main power supply circuit further comprises a capacitor C3, one end of which is connected with the Vin port, and the other end of which is grounded. One end of the capacitor C4 is connected with the DC/DC module, and the other end of the capacitor C is grounded. One end of the capacitor C2 is connected with the Vout port, and the other end of the capacitor C is grounded. One end of the capacitor C1 is connected with the switching circuit, and the other end of the capacitor C is grounded.
The DC/DC module converts the input voltage into a voltage suitable for the buck chip, which is delivered to the Vin port.
The buck chip reduces the voltage to a required low voltage through buck conversion according to the input voltage, and outputs a stable voltage through the Vout port.
Capacitors C3 and C4 are used to smooth and filter the input voltage, reducing noise and ripple.
The capacitors C2 and C1 are used to smooth and filter the output voltage, ensuring that the switching circuit receives a stable supply voltage.
In an embodiment of the present utility model, optionally, as shown in fig. 6, the switching circuit includes:
The drain electrode of the MOS tube Q2 is connected with the power supply end of the BMS system, the base electrode of the MOS tube Q2 is connected with the main power supply circuit and the anode of the diode D3, the MOS tube is grounded through a resistor R6, the source electrode of the MOS tube Q2 is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the backup battery, and the cathode of the diode D3 is connected with the power supply end of the BMS system.
The switching circuit realizes power supply switching between the main power supply and the backup battery through the control of the MOS tube Q2 and the unidirectional conductive characteristic of the diodes D2 and D3. The MOS tube Q2 is conducted and supplies power from a main power supply, and the MOS tube Q2 is closed and is switched to a backup battery for supplying power, so that stable power supply of the BMS system can be ensured all the time.
In the embodiment of the utility model, the backup battery is an ER34615 lithium-ion battery, the rated voltage is 3.6V, the rated capacity is 19Ah, and the power supply is provided when the BMS operates with ultra-low power consumption. The communication terminal J1 is input to the switching circuit, but is not limited thereto.
In the embodiment of the utility model, as shown in fig. 7, optionally, the charging wake-up circuit further comprises a1 port of the optocoupler U1 connected with the positive electrode of the charging port through a plurality of resistors, a 2 port of the optocoupler U1 connected with the negative electrode of the charging port, a resistor R9 connected between the 1 port and the 2 port of the optocoupler U1, a drain electrode of the MOS tube Q1 connected with an anode of the diode D1 through the resistor R1, a source electrode of the MOS tube Q1 connected with an anode of the diode D4 through a resistor R3 and a resistor R5, a source electrode of the MOS tube Q1 connected with a power supply end of the BMS system, a base electrode of the MOS tube Q1 connected with the resistor R5, a cathode of the diode D1 connected with a processor in the BMS system, a cathode of the diode D4 connected with a 3 port of the optocoupler U1, and a 4 port of the optocoupler U1 connected with ground.
When the voltage between P+ and P-is detected, the optical coupler U1 is conducted, a high-level signal is generated and output to the PA0 pin of the MCU, and accordingly the MCU is awakened. The isolation and transmission of the voltage signals are realized mainly through an optical coupler U1. When the voltage between P+ and P-is detected, the optical coupler U1 is conducted, and the output end of the optical coupler generates a high-level signal. The high level signal is transmitted through the PA0 pin of the MCU, triggering the wake-up of the MCU.
In the embodiment of the present utility model, optionally, as shown in fig. 8, a BMS power supply flowchart is shown in the embodiment of the present utility model. The method comprises the following steps:
When the charger is connected, the BMS is awakened, at the moment, the BMS is switched to external power supply, whether external connection exists or not is judged, if yes, the BMS is switched to internal power supply, and if not, the BMS continues to supply external power. And continuously judging whether the internal power supply is not charged for a long time or not in the internal power supply period, if so, disconnecting the internal power supply, enabling the BMS to sleep, and if not, continuously supplying the internal power.
Embodiment two:
The present application proposes a circuit protection board characterized in that the circuit protection board employs the BMS power supply control system as described in embodiment 1.
In summary, the application provides a BMS power supply control system, which mainly comprises a BMS controller, a first switch, a second switch, a DC/DC module, a main power supply circuit, a switching circuit, a backup battery and a charging wake-up circuit. The BMS controller can transmit a control signal to the first switch and can also transmit a control signal to the second switch. One end of the first switch is connected to the positive electrode of the battery pack, one end of the second switch is connected to the positive electrode of the charging port, and output ends of the first switch and the second switch are connected to the DC/DC module. The DC/DC module is connected to the main power circuit. The main power supply circuit supplies power to the BMS system through the switching circuit, and meanwhile, the switching circuit is also connected with the backup battery. The backup battery provides backup power when the system is operating normally. When the BMS system is in a dormant state, the charging wake-up circuit can wake up the BMS system, so that the system can be ensured to resume working at any time.
The application can flexibly switch various power supply modes, and achieves the aim of effectively protecting the battery cell, thereby prolonging the service life of the battery cell.
In several embodiments provided by the present application, it will be understood that each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in the form of a software product stored in a storage medium, comprising several instructions for causing an electronic device to perform all or part of the steps of the method according to the embodiments of the present application. The storage medium includes a U disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, an optical disk, or other various media capable of storing program codes.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application, and are not to be construed as limiting the scope of the application. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present application are intended to be included in the scope of the present application.
Claims (8)
1. The BMS power supply control system is characterized by comprising a BMS controller, a first switch, a second switch, a DC/DC module, a main power supply circuit, a switching circuit, a backup battery and a charging awakening circuit;
The BMS controller may send a first control signal to the one switch, and the BMS controller may also send a second control signal to the second switch;
The first switch input end is connected with the battery pack positive electrode of the BMS system, the second switch is connected with the charging port positive electrode of the BMS system, and the first switch output end and the second switch output end are connected with the DC/DC module; the DC/DC module is connected with the main power supply circuit, the main power supply circuit is connected with the switching circuit, the backup battery is also connected with the switching circuit, the switching circuit supplies power to the whole BMS system, and the charging awakening circuit is used for awakening the BMS system when the BMS system is in a dormant state.
2. The BMS power supply control system according to claim 1, wherein said first switch comprises:
The base electrode of the MOS tube Q3 is connected with the BMS controller through a resistor R10, the source electrode of the MOS tube Q3 is grounded, the drain electrode of the MOS tube Q3 is connected with the anode of a diode D5, the cathode of the diode D5 is connected with a first direct current power supply, a first switch optocoupler is connected with the diode D5 in parallel, the input end of the first switch optocoupler is connected with the anode of the charging port, and the output end of the first switch optocoupler is connected with the DC/DC module.
3. The BMS power supply control system according to claim 2, wherein said second switch comprises:
The base electrode of the MOS tube Q4 is connected with the BMS controller through a resistor R11, the source electrode of the MOS tube Q4 is grounded, the drain electrode of the MOS tube Q4 is connected with the anode of a diode D6, the cathode of the diode D6 is connected with a second direct current power supply, a second switch optocoupler is connected with the diode D6 in parallel, the input end of the second switch optocoupler is connected with the anode of the charging port, and the output end of the second switch optocoupler is connected with the DC/DC module.
4. The BMS power supply control system according to claim 3, wherein the DC/DC module comprises a DC-DC chip comprising a Vi+ port, a Vi-port, a +Vo port and a 0V port, wherein the Vi+ port is connected with the first switch and the second switch, the Vi-port is connected with a charging port cathode, the +Vo port is connected with the main power circuit, and the 0V port is grounded.
5. The BMS power supply control system according to claim 4, wherein the main power supply circuit comprises a buck chip comprising a Vin port and a Vout port, the Vin port being connected to the DC/DC module, the Vout port being connected to the switching circuit.
6. The BMS power supply control system according to claim 5, wherein said switching circuit comprises:
The drain electrode of the MOS tube Q2 is connected with the power supply end of the BMS system, the base electrode of the MOS tube Q2 is connected with the main power supply circuit and the anode of the diode D3, the MOS tube is grounded through a resistor R6, the source electrode of the MOS tube Q2 is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the backup battery, and the cathode of the diode D3 is connected with the power supply end of the BMS system.
7. The BMS power supply control system according to claim 6, wherein the charging wake-up circuit further comprises a1 port of the optocoupler U1 connected with the positive electrode of the charging port through a plurality of resistors, a2 port of the optocoupler U1 connected with the negative electrode of the charging port, a resistor R9 connected between the 1 port and the 2 port of the optocoupler U1, a drain electrode of the MOS transistor Q1 connected with the anode of the diode D1 through the resistor R1, a source electrode of the MOS transistor Q1 connected with the anode of the diode D4 through the resistor R3 and the resistor R5, a source electrode of the MOS transistor Q1 further connected with the power supply end of the BMS system,
The base electrode of the MOS tube Q1 is connected with the resistor R5, the cathode of the diode D1 is connected with a processor in the BMS system, the cathode of the diode D4 is connected with the 3 port of the optical coupler U1, and the 4 port of the optical coupler U1 is grounded.
8. A circuit protection board, characterized in that the circuit protection board employs the BMS power supply control system according to claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423171241.0U CN223729469U (en) | 2024-12-23 | 2024-12-23 | BMS power supply control system and circuit protection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423171241.0U CN223729469U (en) | 2024-12-23 | 2024-12-23 | BMS power supply control system and circuit protection board |
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| CN223729469U true CN223729469U (en) | 2025-12-26 |
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| CN202423171241.0U Active CN223729469U (en) | 2024-12-23 | 2024-12-23 | BMS power supply control system and circuit protection board |
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