Two-way switchable direct-current power supply

Abstract

The utility model belongs to the field of direct-current power supplies, and discloses a double-circuit switchable direct-current power supply, which comprises a direct-current power supply A, a direct-current power supply B, a charging port A, a charging port B, a driving module and a main control module, the direct-current power supply A and the direct-current power supply B are connected with a total input power supply, the charging port A and the charging port B are mutually connected to form a loop, the direct-current power supply A and the direct-current power supply B are located between the charging port A and the charging port B, a cathode of the direct-current power supply A is connected with a cathode of the charging port A, and an anode of the direct-current power supply A is connected with an anode of the charging port A; the cathode of the direct-current power supply B is connected with the cathode of the charging port B; the anode of the direct-current power supply B is connected with the anode of the charging port B; the driving module comprises a relay K1, a relay K2 and a relay K3, the relay K1 is located between the power supply A and the charging port A, one end is connected with the anode of the charging port A, and the other end is connected with the anode of the power supply A. And a hardware basis can be provided for switching power supply according to actual requirements and improving the power supply power.

Description

Technical Field

[0001] The present invention relates to the field of direct current power supply, and specifically relates to a dual-channel switchable direct current power supply. Background Art

[0002] With the rapid progress of new energy technologies, the application of lithium batteries is becoming more and more extensive, their functionality is becoming more and more complex, and the requirements for charging and discharging are becoming higher and higher. In the field of charging, high-efficiency and high-flexibility power supply solutions have become the goal pursued by the industry. Traditional DC power supplies often only have a single power supply path, which cannot meet the requirements of charging multiple devices at the same time or providing stable output under high power requirements. Therefore, dual-channel DC power supplies came into being. The dual-channel DC power supply system provides more power supply paths by integrating two independent power modules, which can better meet the needs of the power supply system. However, the existing dual-channel DC power supply hardware equipment has certain limitations in power supply switching, and often cannot adjust the power supply path according to actual needs, which to a certain extent limits its application scope and efficiency.

[0003] Therefore, there is an urgent need for a hardware device that can provide the basic hardware conditions for switching power supply according to actual needs and increasing power supply power. Utility Model Content

[0004] The purpose of this solution is to provide a dual-channel switchable DC power supply, which can provide a hardware basis for switching power supply according to actual needs and increasing power supply power.

[0005] In order to achieve the above object, the present solution provides a dual-channel switching DC power supply, including: DC power supply A and DC power supply B, charging port A and charging port B, a drive module, and a main control module;

[0006] The DC power supply A and the DC power supply B are connected to the total input power supply, the charging port A and the charging port B are connected to each other to form a loop, the DC power supply A and the DC power supply B are located between the charging ports A and B, the negative electrode of the DC power supply A is connected to the negative electrode of the charging port A, and the positive electrode of the DC power supply A is connected to the positive electrode of the charging port A; the negative electrode of the DC power supply B is connected to the negative electrode of the charging port B, and the positive electrode of the DC power supply B is connected to the positive electrode of the charging port B;

[0007] The driving module includes relay K1, relay K2 and relay K3. Relay K1 is located between power source A and charging port A, with one end connected to the positive pole of charging port A and the other end connected to the positive pole of power source A; relay K2 is located between power source A and power source B, with one end connected to the positive pole of power source A and the other end connected to the positive pole of power source B; relay K3 is located between power source B and charger B, with one end connected to the positive pole of power source B and the other end connected to the positive pole of charging port B;

[0008] The main control module includes a main control chip and a relay driving chip. The main control chip is connected to the relay K1, the relay K2 and the relay K3 respectively through the relay driving chip.

[0009] The principle and technical effect of this solution are:

[0010] When working, power supply A and power supply B supply the current of the total input power supply to charging port A and charging port B respectively. According to different power supply requirements, the main control chip can control the circuit through the relay driver chip. The relay K1 located between power supply A and charging port A and the relay K3 located between power supply B and charging port B can control the connection or disconnection of the circuits supplied to charging port A and charging port B respectively, and the relay K2 located between power supply A and power supply B can control the connection or disconnection of the circuit between power supply A and power supply B. Therefore, when only charging port A is in use, in addition to power supply A to supply it, relays K1 and K2 can be connected, and relay K3 can be disconnected, so that power supply B can also supply it with power; when only charging port B is in use, in addition to power supply B to supply it with power, relays K2 and K3 can be connected, and relay K1 can be disconnected, so that power supply A can also supply it with power; when charging ports A and B are used at the same time, relays K1 and K3 are connected, and relay K2 is disconnected, so that power supplies A and B can supply power to charging ports A and B respectively.

[0011] This solution places three relays between two DC power supplies and two charging ports. The circuit can be regulated by controlling the connection and disconnection of the relays. When a single charging port is in use, the dual power supplies are regulated to supply power to it, doubling the charging power of the charging port. When dual charging ports are in use, the dual power supplies are regulated to supply power separately, and the charging power of the charging ports remains unchanged. The two power supplies do not interfere with each other, providing a hardware foundation for dynamically allocating the output of the two DC power supplies in the future to maximize power.

[0012] Furthermore, the relay driver chip uses BTS724G and the main control chip uses N32G457REL7.

[0013] The above-mentioned chip has low cost and stable performance and is suitable for various circuit systems that require precise control and protection. The above-mentioned chip not only provides powerful data processing capabilities, but also has rich peripheral interfaces and flexible programming methods, making the entire circuit system more efficient.

[0014] Furthermore, a step-down power supply is provided between the total input power supply and the main control chip.

[0015] By adopting the above structure, the 220V AC power of the total input power supply can be converted into 12V DC power to supply the main control module, ensuring that the main control chip and the modules connected to it obtain a stable and safe power supply, thereby improving the safety and stability of the circuit.

[0016] Furthermore, a diode and a 3.3V low voltage regulator chip LDO are connected in series between the step-down power supply and the main control chip in sequence, the cathode of the diode is connected to the main control chip, and the anode is connected to the 3.3V low voltage regulator chip LDO.

[0017] By adopting the above structure, the 12V DC power output by the step-down power supply can be stably converted into 3.3V DC power to meet the operating voltage requirements of the main control chip and its peripheral circuits, and ensure the unidirectional flow of current, thereby preventing the current from flowing back into the low-voltage regulator chip LDO (3.3V), protecting it from damage, and further improving the safety of the circuit.

[0018] Furthermore, the main control module is also provided with no less than two transceivers, one end of which is connected to the main control chip, and the other end is respectively connected to DC power supply A and DC power supply B, and the other end of which is connected to the main control chip at one end, and the other end is respectively connected to charging port A and charging port B.

[0019] With the above structure, the main control chip can communicate and exchange data with DC power supply A, DC power supply B, charging port A and charging port B in real time, and control the output status of DC power supply A and DC power supply B according to actual needs, and monitor the charging status of charging port A and charging port B.

[0020] Furthermore, the transceiver chip connecting the main control chip with the DC power supply A and the DC power supply B adopts MAX485EN, and the transceiver chip connecting the main control chip with the charging port A and the charging port B adopts CAN;

[0021] The above structure can ensure the reliability and stability of data transmission. The MAX485EN chip is a commonly used transceiver that can effectively suppress common-mode interference and improve the anti-interference ability of data transmission. The CAN transceiver chip can achieve high-speed and long-distance data transmission, ensuring the reliability and integrity of data transmission.

[0022] Furthermore, the main control module is also provided with several temperature sensors, which are respectively located on the charging port A, the charging port B, the relay K1 and the relay K3, and these temperature sensors are respectively connected to the main control chip.

[0023] With the above structure, the main control chip can obtain the temperature data of key parts such as the charging port and relay in real time, so as to ensure that these parts operate within a safe temperature range. When the temperature sensor detects that the temperature of a certain part is abnormal, it will immediately send the relevant information to the main control chip. Based on the received temperature data, the main control chip can determine whether corresponding protective measures need to be taken, such as closing the charging port, disconnecting the relay, etc., to avoid safety accidents caused by overheating.

[0024] Furthermore, the main control module is also provided with a display screen, a plurality of buttons and a buzzer, and the display screen, buttons and buzzer are all connected to the main control chip.

[0025] With the above structure, users can interact with the system conveniently. The display screen can display the system status information in real time, such as the current voltage, current, charging progress, etc., so that users can intuitively understand the operation of the system. Several buttons provide a means for user input. Users can control the system through buttons, such as starting, stopping, setting parameters, etc. The buzzer is used to provide sound prompts. For example, when the system fails or charging is completed, the buzzer will sound to remind the user.

[0026] Furthermore, the main control module is also provided with a cooling fan, and the cooling fan is connected to the main control chip.

[0027] By adopting the above structure, when the temperature sensor senses that the temperature of the key parts is high, the cooling fan can be started to dissipate heat and cool the key parts, ensuring that the key components maintain a suitable temperature when running for a long time or working at high load, thereby avoiding performance degradation or damage caused by overheating.

[0028] Furthermore, the main control module is also provided with an overcurrent protection circuit, which includes no less than two current sensors, one is arranged between the power supply A and the charging port A, and the other is arranged between the power supply B and the charging port B, and the current sensor is connected to the main control chip.

[0029] By adopting the above structure, the current conditions of the two charging paths can be monitored in real time. When the current of any path exceeds the set safety threshold, the main control chip can quickly receive the signal from the current sensor and initiate corresponding protection measures, such as disconnecting the relay on the corresponding circuit, to prevent excessive current from damaging the charging equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The utility model discloses a dual-channel switchable DC power supply circuit diagram.

[0031] The following is a further detailed description through specific implementation methods: DETAILED DESCRIPTION

[0032] The embodiment is basically as shown in the attached Figure 1 As shown:

[0033] This solution provides a dual-channel switching DC power supply, including: DC power supply A and DC power supply B, charging port A and charging port B, a drive module, and a main control module;

[0034] The DC power supply A and the DC power supply B are connected to the total input power supply, the charging port A and the charging port B are connected to each other to form a loop, the DC power supply A and the DC power supply B are located between the charging ports A and B, the negative electrode of the DC power supply A is connected to the negative electrode of the charging port A, and the positive electrode of the DC power supply A is connected to the positive electrode of the charging port A; the negative electrode of the DC power supply B is connected to the negative electrode of the charging port B, and the positive electrode of the DC power supply B is connected to the positive electrode of the charging port B;

[0035] The driving module includes relay K1, relay K2 and relay K3. Relay K1 is located between power source A and charging port A, with one end connected to the positive pole of charging port A and the other end connected to the positive pole of power source A; relay K2 is located between power source A and power source B, with one end connected to the positive pole of power source A and the other end connected to the positive pole of power source B; relay K3 is located between power source B and charger B, with one end connected to the positive pole of power source B and the other end connected to the positive pole of charging port B;

[0036] The main control module includes a main control chip N32G457REL7 and a relay driver chip BTS724G, and the main control chip is connected to relay K1, relay K2 and relay K3 respectively through the relay driver chip;

[0037] A step-down power supply is also provided between the total input power supply and the main control chip, which is used to convert the 220V AC power of the total input power supply into 12V DC power to supply the main control module.

[0038] A low-voltage regulator chip LDO (3.3V) and a diode are connected in series between the step-down power supply and the main control chip. The cathode of the diode is connected to the main control chip, and the anode is connected to the low-voltage regulator chip LDO (3.3V).

[0039] The main control module is also equipped with no less than two transceivers. One end of the transceiver MAX485EN is connected to the main control chip, and the other end is connected to DC power supply A and DC power supply B respectively. One end of the transceiver CAN is connected to the main control chip, and the other end is connected to charging port A and charging port B respectively.

[0040] The main control module is also equipped with several temperature sensors, which are located on charging port A, charging port B, relay K1 and relay K3. These temperature sensors are connected to the main control chip respectively to monitor the temperature conditions of key parts and send them to the main control chip.

[0041] The main control module is also provided with a display screen, several buttons and a buzzer, and the display screen, buttons and buzzer are all connected to the main control chip MCU.

[0042] The main control module is also provided with a cooling fan, which is connected to the main control chip and is used to dissipate heat and cool down key parts.

[0043] When working, the total input power supplies the power module. Power supply A and power supply B convert the AC power of the total input power into DC power and supply it to charging port A and charging port B respectively. The step-down power supply converts the 220V AC power of the total input power into 12V DC power through the low-voltage regulator chip LDO (3.3V) and diode to supply it to the main control module.

[0044] When only charging port A needs to charge, the operator uses the buttons and display screen to input the required parameters in the main control module. The main control chip N32G457REL7 sends instructions to the power supply and charging port through the transceiver MAX485EN and the transceiver CAN to start charging. At the same time, the relay driver chip BTS724G controls the relays K1 and K2 to connect and K3 to disconnect so that power supply A and power supply B can supply power to charging port A at the same time. In this way, compared with power supply A alone, the power of charging port A is doubled.

[0045] When only charging port B needs to charge, the operator inputs the required parameters using the buttons and display screen on the main control module. The main control chip N32G457REL7 sends instructions to the power supply and charging port through the transceiver MAX485EN and the transceiver CAN to start charging. At the same time, the relay driver chip BTS724G controls the connection of relays K2 and K3 and the disconnection of K1 to enable power supply A and power supply B to supply power to charging port B at the same time. In this way, compared with power supply B alone, the charging power of charging port B is doubled.

[0046] When both charging port A and charging port B need to charge, the operator inputs the required parameters using the buttons and display screen on the main control module. The main control chip N32G457REL7 sends instructions to the power supply and charging port through the transceiver MAX485EN and the transceiver CAN to start charging. At the same time, the relay driver chip BTS724G controls the connection of relays K1 and K3 and the disconnection of K2 to achieve power supply A only for charging port A and power supply B only for charging port B. The two power supplies do not interfere with each other, and the power of charging ports A and B remains unchanged.

[0047] In conjunction with relevant programs and algorithms, the main control chip will continuously monitor the current output when the power supply is working. In the case of single-channel use, when the output power is close to the maximum output power of the current DC power supply, another power supply will be automatically connected in parallel to increase the output capacity of the current charging port, and the other charging port will be closed. When the output power of charging port A is lower than the maximum output power of DC power supply A, and there is an output request for charging port B, DC power supplies A and B will automatically exit the parallel state, DC power supply A will continue to output to charging port A, and DC power supply B will output to charging port B according to the request parameters. This dual-channel DC power supply can automatically switch between single-channel or dual-channel power supply according to actual charging needs, dynamically allocate the output of two power supplies, and maximize power.

[0048] The current sensors installed between power sources A, B and charging ports A, B are responsible for monitoring the current in these two lines respectively. If the current between the power source and the charging port exceeds the set safety threshold, the main control chip can receive the signal from the current sensor and take measures to disconnect the relay to prevent excessive current from damaging the charging equipment.

[0049] The temperature sensors installed on charging ports A, B and relays K1, K3 are responsible for monitoring the temperatures of these key parts and displaying them on the display screen. Then, through relevant programs, the main control chip calculates the required cooling fan speed based on the received temperature data, and sends instructions to the cooling fan to adjust its speed, thereby improving cooling efficiency and reducing energy consumption.

[0050] When the temperature sensor detects that the temperature of a key part continues to exceed the preset safety threshold, the main control chip immediately activates the automatic power-off protection mechanism through the relevant program. Under this mechanism, the main control chip first displays a warning message on the display screen and sounds an alarm through the buzzer to alert the user. At the same time, the main control chip directly controls the relevant relays to cut off the power supply of the relevant circuits, thereby avoiding equipment damage or safety risks that may be caused by overheating.

[0051] When there is no need to charge for a long time or the device is fully charged, the main control chip enters the energy-saving mode through the relevant program, and controls the relevant relays to cut off the power supply of the relevant circuits. At the same time, in the energy-saving mode, the speed of the cooling fan will also be reduced accordingly, and the brightness of the display will decrease, further reducing energy consumption.

[0052] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A dual-channel switchable DC power supply, characterized in that: include: DC power supply A and DC power supply B, charging port A and charging port B, drive module, main control module; The DC power supply A and the DC power supply B are connected to the total input power supply, the charging port A and the charging port B are connected to each other to form a loop, the DC power supply A and the DC power supply B are located between the charging ports A and B, the negative electrode of the DC power supply A is connected to the negative electrode of the charging port A, and the positive electrode of the DC power supply A is connected to the positive electrode of the charging port A; the negative electrode of the DC power supply B is connected to the negative electrode of the charging port B, and the positive electrode of the DC power supply B is connected to the positive electrode of the charging port B; The driving module includes relay K1, relay K2 and relay K3. Relay K1 is located between power source A and charging port A, with one end connected to the positive pole of charging port A and the other end connected to the positive pole of power source A; relay K2 is located between power source A and power source B, with one end connected to the positive pole of power source A and the other end connected to the positive pole of power source B; relay K3 is located between power source B and charger B, with one end connected to the positive pole of power source B and the other end connected to the positive pole of charging port B; The main control module includes a main control chip and a relay driving chip. The main control chip is connected to the relay K1, the relay K2 and the relay K3 respectively through the relay driving chip.

2. A dual-channel switchable DC power supply according to claim 1, characterized in that: The relay driver chip uses BTS724G and the main control chip uses N32G457REL7.

3. A dual-channel switchable DC power supply according to claim 1, characterized in that: A step-down power supply is also provided between the total input power supply and the main control chip.

4. A dual-channel switchable DC power supply according to claim 3, characterized in that: A diode and a 3.3V low-voltage regulator chip LDO are connected in series between the step-down power supply and the main control chip. The cathode of the diode is connected to the main control chip, and the anode is connected to the 3.3V low-voltage regulator chip LDO.

5. A dual-channel switchable DC power supply according to claim 1, characterized in that: The main control module is also equipped with no less than two transceivers, one end of which is connected to the main control chip, and the other end is connected to DC power supply A and DC power supply B respectively; one end of the other transceiver is connected to the main control chip, and the other end is connected to charging port A and charging port B respectively.

6. A dual-channel switchable DC power supply according to claim 5, characterized in that: The transceiver chip connecting the main control chip with the DC power supply A and the DC power supply B adopts MAX485EN, and the transceiver chip connecting the main control chip with the charging port A and the charging port B adopts CAN.

7. A dual-channel switchable DC power supply according to claim 1, characterized in that: The main control module is also equipped with several temperature sensors, which are located on the charging port A, charging port B, relay K1 and relay K3 respectively. These temperature sensors are respectively connected to the main control chip.

8. The dual-channel switchable DC power supply according to claim 1, characterized in that: The main control module is also provided with a display screen, a plurality of buttons and a buzzer, and the display screen, buttons and buzzer are all connected to the main control chip.

9. A dual-channel switchable DC power supply according to claim 1, characterized in that: The main control module is also provided with a cooling fan, and the cooling fan is connected to the main control chip.

10. The dual-channel switchable DC power supply according to claim 1, characterized in that: The main control module is also provided with an overcurrent protection circuit, which includes no less than two current sensors, one is arranged between power supply A and charging port A, and the other is arranged between power supply B and charging port B, and the current sensors are connected to the main control chip.

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