Control circuit, energy storage power supply and cable

Abstract

The application discloses a control circuit, an energy storage power supply and a cable. The control circuit comprises a relay and a switching control circuit. The relay comprises a coil and a contact switch. The coil is used to generate a magnetic force to make the contact switch close when current passes through. The switching control circuit is used to adjust the voltage of the coil. When the relay output is turned on, the coil receives a first voltage to ensure that the contact switch generates a closing action. When the relay maintains the output, the coil receives a second voltage to ensure that the contact switch maintains a closed state. The first voltage is greater than the second voltage. In this way, at the beginning of the relay power supply, the switching control circuit can output a larger voltage to the coil, so that the coil has enough magnetic force to pull the contact switch to act. After the contact switch is closed, the switching control circuit can output a smaller voltage to the coil, so that the coil can maintain the closed state of the contact switch.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and more specifically, to a control circuit, an energy storage power supply, and a cable. Background Technology

[0002] Currently available car jump starters use a relay system for ignition control, typically powering the coil with battery voltage without adjustment or variation. However, the relay coil operates at a relatively high voltage or current, causing it to overheat after a period of continuous operation. This results in energy loss and heat buildup, posing safety risks. Summary of the Invention

[0003] This application provides a control circuit, an energy storage power supply, and a cable.

[0004] The control circuit of this application includes a relay and a switching control circuit. The relay includes a coil and a contact switch. The coil generates a magnetic force when current passes through it to close the contact switch. The switching control circuit adjusts the voltage of the coil. When the relay output is turned on, the coil receives a first voltage to ensure that the contact switch closes. When the relay maintains its output, the coil receives a second voltage to ensure that the contact switch remains closed. The first voltage is greater than the second voltage.

[0005] In the control circuit of this embodiment, the control circuit includes a relay and a switching control circuit. The relay includes a coil and a contact switch. The coil generates magnetic force when current flows through it, causing the contact switch to close. The switching control circuit regulates the voltage of the coil. When the relay output is turned on, the coil receives a first voltage to ensure the contact switch closes. When the relay maintains its output, the coil receives a second voltage to ensure the contact switch remains closed. The first voltage is greater than the second voltage. Thus, the control circuit can be forcibly started via the relay to ensure the energy storage module can provide emergency power. At the beginning of the relay power supply, the switching control circuit can output a larger voltage to the coil so that the coil has sufficient magnetic force to pull the contact switch. After the contact switch closes, the switching control circuit can output a smaller voltage to the coil so that the coil can maintain the closed state of the contact switch. This avoids both severe coil overheating when the relay is constantly engaged and the problem of weak relay contact during ignition.

[0006] In some embodiments, the switching control circuit includes a switching switch and a resistor module. The switching switch and the resistor module are connected in parallel and then in series with the coil. When the relay output is activated, the switching switch is closed to short-circuit the resistor module. When the relay maintains its output, the switching switch is open to connect the resistor module to the energized path of the coil. Thus, the switching switch can be connected in parallel with the resistor module and then in series with the coil. This allows the switching switch to control whether the resistor module is connected to the coil, enabling the coil to switch between a first voltage and a second voltage. This avoids both the problem of severe coil overheating when the relay is continuously engaged and the problem of loose relay contact during ignition.

[0007] In some embodiments, the switching control circuit further includes a first control transistor and a second control transistor. The first control transistor is connected to the switching switch and is used to receive signals to control the switching switch to be on or off. The second control transistor is located in the energized path of the coil and is used to receive signals to turn the relay on or off. Thus, the cooperation of the first and second control transistors can realize the turning on or off of the relay and the connection and disconnection of the resistor module, ensuring that the relay can switch between two voltages and ensuring stable operation of the relay.

[0008] In some embodiments, the control circuit further includes a control unit connected to and used to control the switching control circuit. Thus, the control unit can be connected to a first control transistor and a second control transistor, and can control the connection of the resistor module and the relay by sending signals to the first and second control transistors.

[0009] In some embodiments, the control circuit further includes an energy storage module connected to the relay, which in turn connects to the target power supply system. Thus, the energy storage module stores electrical energy, and its connection to the relay supplies power to the target power supply system, ensuring its normal operation.

[0010] In some embodiments, the target power supply system includes at least one of a vehicle battery and / or an engine; the energy storage module may include at least one of a battery and / or a capacitor, and the energy storage module supplies power to the target power supply system via the relay for ignition. Thus, the energy storage module can supply power to the vehicle's battery and engine, and provide the energy required for ignition of the target power supply system during startup, ensuring normal startup and stable operation of the target power supply system.

[0011] In some embodiments, the control circuit further includes a conversion circuit and a control unit. The conversion circuit is disposed between the energy storage module and the control unit. The conversion circuit converts the voltage of the energy storage module into the supply voltage required by the control unit. The control unit is connected to the switching control circuit and controls the switching control circuit. Thus, the electrical energy provided by the energy storage module can be supplied to the control unit after passing through the conversion circuit, ensuring the normal operation of the control unit. The control unit can connect to the switching control circuit and send control signals to the switching control circuit, thereby adjusting the coil voltage. This avoids both severe coil overheating when the relay is constantly engaged and the problem of loose relay contact during ignition.

[0012] In some embodiments, the control circuit further includes a voltage detection circuit and a control unit. The voltage detection circuit is connected to the control unit, and is used to detect the voltage magnitude of the target power supply system. The control unit controls the switching control circuit based on the detection result of the voltage detection circuit. Thus, the voltage detection circuit can detect the voltage magnitude of the target power supply system and transmit the detection result to the control unit. The control unit can then control the switching control circuit based on the detection result, thereby changing the voltage of the coil.

[0013] In some embodiments, the switching control circuit is further configured to provide a first voltage to the coil when the target power supply system ignites. Thus, when a forced start is required due to insufficient voltage in the target power supply system, the switching control circuit can change the coil voltage, allowing the energy storage module to provide the first voltage to the coil, thereby enabling the target power supply system to ignite and start.

[0014] In some embodiments, the control circuit further includes a voltage detection circuit for detecting the voltage of the target power supply system. When the voltage drop of the target power supply system exceeds a threshold, the switching control circuit sends a first voltage to the coil within a first time range. Thus, when the voltage drop of the target power supply system exceeds the threshold, it can be determined that the voltage of the target power supply system is too low and ignition is required to ensure a voltage increase. Simultaneously with ignition, the switching control circuit sends a first voltage to the coil within a first time range, ensuring that the coil has sufficient magnetic force to actuate the contact switch.

[0015] In some embodiments, the control circuit further includes a current detection circuit. This current detection circuit detects the current in the energized path of the energy storage module supplying power to the target power supply system. If the current detected by the current detection circuit exceeds a preset current value, the switching control circuit applies a first voltage to the coil within a first time frame. Thus, when the current detection circuit detects that the current in the energized path of the target power supply system exceeds the preset current value, the switching control circuit can apply a first voltage to the coil within a first time frame to restart the relay, ensuring the stable operation of the entire system.

[0016] In some embodiments, the energy storage module switches to outputting the second voltage after outputting the first voltage within a first time range. Thus, the first voltage is greater than the second voltage. At the beginning of relay power supply, the switching control circuit can output a larger first voltage to the coil, providing sufficient magnetic force to actuate the contact switch. After the contact switch closes, the switching control circuit can output a smaller second voltage to the coil, allowing the coil to maintain the closed state of the contact switch and thus restart the target power supply system. This avoids both severe coil overheating due to prolonged relay engagement and the problem of weak relay contact during ignition.

[0017] In some implementations, the first time range is 1-2 seconds. Setting the first time range within this range ensures that the coil has sufficient time to trigger the contact switch to close, guaranteeing reliable relay contact during ignition, while also preventing excessive coil overheating due to prolonged relay engagement.

[0018] In some embodiments, the energy storage module outputs the second voltage within a second time range of 20-40 seconds. This second time range ensures that the coil maintains the closed state of the contact switch, thus preventing problems with weak relay contact during ignition.

[0019] The energy storage power supply of this application includes the control circuit described in any of the above embodiments.

[0020] The cable of this application includes a housing, a control circuit as described in any of the above embodiments disposed within the housing, a first connector and a second connector, wherein the first connector and the second connector are used to connect to a target power supply system.

[0021] In the control circuit, energy storage power supply, and cable of the embodiments of this application, the control circuit includes a relay and a switching control circuit. The relay includes a coil and a contact switch. The coil generates magnetic force when current flows through it, causing the contact switch to close. The switching control circuit regulates the voltage of the coil. When the relay output is turned on, the coil receives a first voltage to ensure the contact switch closes. When the relay maintains its output, the coil receives a second voltage to ensure the contact switch remains closed. The first voltage is greater than the second voltage. Thus, the control circuit can be forcibly started via the relay to ensure the energy storage module can provide emergency power. At the beginning of the relay power supply, the switching control circuit can output a larger voltage to the coil so that the coil has sufficient magnetic force to pull the contact switch. After the contact switch closes, the switching control circuit can output a smaller voltage to the coil so that the coil can maintain the closed state of the contact switch. This avoids both severe coil overheating when the relay is constantly engaged and the problem of loose relay contact during ignition.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the module structure of the control circuit according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the circuit structure of the control circuit according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the module structure of the energy storage power supply according to an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the module structure of the cable according to an embodiment of this application.

[0028] Explanation of key component symbols:

[0029] Control circuit 100;

[0030] Relay 10, coil 11, contact switch 12, switching control circuit 20, switching switch 21, resistor module 22, first control tube 23, second control tube 24, control unit 30, energy storage module 40, conversion circuit 50, voltage detection circuit 60, current detection circuit 70, energy storage power supply 200, cable 300, first connector 301, second connector 302, housing 303, target power supply system 400. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples and settings are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0034] Please see Figure 1 and Figure 2 The control circuit 100 of this application embodiment includes a relay 10 and a switching control circuit 20. The relay 10 includes a coil 11 and a contact switch 12. The coil 11 is used to generate magnetic force when current passes through so that the contact switch 12 closes. The switching control circuit 20 is used to adjust the voltage of the coil 11. When the relay 10 is turned on to output, the coil 11 receives a first voltage to ensure that the contact switch 12 closes. When the relay 10 maintains output, the coil 11 receives a second voltage to ensure that the contact switch 12 remains closed. The first voltage is greater than the second voltage.

[0035] In the control circuit 100 of this embodiment, the control circuit 100 includes a relay 10 and a switching control circuit 20. The relay 10 includes a coil 11 and a contact switch 12. The coil 11 generates magnetic force when current flows through it, causing the contact switch 12 to close. The switching control circuit 20 regulates the voltage of the coil 11. When the relay 10 is turned on, the coil 11 receives a first voltage to ensure that the contact switch 12 closes. When the relay 10 maintains its output, the coil 11 receives a second voltage to ensure that the contact switch 12 remains closed. The first voltage is greater than the second voltage. Thus, the control circuit 100 can be forcibly started by the relay 10 to ensure that the energy storage module 40 can be powered in an emergency. At the beginning of the power supply of the relay 10, the switching control circuit 20 can output a larger voltage to the coil 11 so that the coil 11 has sufficient magnetic force to pull the contact switch 12. After the contact switch 12 closes, the switching control circuit 20 can output a smaller voltage to the coil 11 so that the coil 11 can maintain the closed state of the contact switch 12. This avoids both the coil 11 overheating due to the relay 10 being constantly engaged and the problem of loose contact at the relay 10 contacts during ignition.

[0036] In related technologies, when a vehicle starts its emergency power supply, the ignition control often uses a relay solution. The coil is typically powered by battery voltage, without any adjustment or change in the supply voltage. The voltage or current required for the coil to normally engage is relatively high. This causes the coil to overheat significantly after the relay needs to remain closed for a period of time, affecting product performance and user experience.

[0037] In this embodiment, the relay 10 and the switching control circuit 20 are combined. The switching control circuit 20 can be used to switch the voltage of the coil 11 of the input relay 10. Specifically, when the output control relay 10 needs to be turned on, a first voltage is used to power the coil 11. After the relay 10 contact switch 12 is engaged, the switching control circuit 20 switches the power supply voltage of the coil 11 to a second voltage to maintain power supply to the coil 11. When the vehicle is detected to be starting, the power supply to the relay 10 is switched back to the first voltage. This avoids the relay 10 contact switch 12 from not making a firm contact due to insufficient power supply to the coil 11 during ignition, thus preventing damage to the relay 10. At the same time, it also avoids the problem of the coil 11 overheating due to long-term operation of the relay 10.

[0038] Please see Figure 1 and Figure 2In some embodiments, the switching control circuit 20 includes a switching switch 21 and a resistor module 22. The switching switch 21 and the resistor module 22 are connected in parallel and then connected in series with the coil 11. When the relay 10 is turned on, the switching switch 21 is turned on so that the resistor module 22 is short-circuited. When the relay 10 maintains the output, the switching switch 21 is turned off so that the resistor module 22 is connected to the power path of the coil 11.

[0039] Thus, the switch 21 can be connected in parallel with the resistor module 22 and then in series with the coil 11. This allows the switch 21 to control whether the resistor module 22 is connected to the coil 11, enabling the coil 11 to switch between a first voltage and a second voltage. This avoids both the problem of the coil 11 overheating due to the relay 10 being constantly engaged and the problem of loose contact at the relay 10 contacts during ignition.

[0040] Specifically, the resistor module 22 can be formed by multiple resistors connected in series or parallel. When the switch 21 is closed, the resistor module 22 is short-circuited to output a first voltage to the relay 10. When the switch 21 is open, the resistor module 22 can be connected in series with the relay 10 to divide the voltage, thereby reducing the voltage of the coil 11 of the relay 10, that is, converting it from the first voltage to the second voltage. Of course, when the vehicle is detected to be starting, the switch 21 can be reconnected to switch back to the first voltage to power the relay 10.

[0041] Please see Figure 1 and Figure 2 In some embodiments, the switching control circuit 20 further includes a first control transistor 23 and a second control transistor 24. The first control transistor 23 is connected to the switching switch 21 and is used to receive signals to control the switching switch 21 to be connected or disconnected. The second control transistor 24 is located in the energized path of the coil 11 and is used to receive signals to turn the relay 10 on or off.

[0042] Thus, the first control transistor 23 and the second control transistor 24 work together to enable the relay 10 to be turned on or off and the resistor module 22 to be connected and disconnected, ensuring that the relay 10 can switch between two voltages and ensuring the stable operation of the relay 10.

[0043] Further, please refer to Figure 1 and Figure 2 In some embodiments, the control circuit 100 further includes a control unit 30, which is connected to the switching control circuit 20 and is used to control the switching control circuit 20.

[0044] Thus, the control unit 30 can connect the first control tube 23 and the second control tube 24, and control the connection between the resistor module 22 and the relay 10 by sending signals to the first control tube 23 and the second control tube 24.

[0045] Specifically, the control unit 30 can be connected to the first control transistor 23 and the second control transistor 24 through different pins. The second control transistor 24 can be used to receive the SW signal to determine whether to connect the coil 11 to the switching control circuit 20. The first control transistor 23 can be used to receive the R_EN signal. When the first control transistor 23 receives a low level, the switching switch 21 is open, and the resistor module 22 is connected in series with the coil 11 to limit current and divide voltage. When the first control transistor 23 receives a high level, the switching switch 21 is closed, the resistor module 22 is short-circuited, and the coil 11 can receive the first voltage.

[0046] When the relay 10 is forcibly activated, both the first control transistor 23 and the second control transistor 24 receive a high level, allowing the coil 11 to receive the first voltage. After a first time interval, the first control transistor 23 receives a low level, the switch 21 is turned off, and the resistor module 22 is connected in series with the coil 11 to limit current and divide voltage, allowing the coil 11 to receive the second voltage. In this way, the supply voltage of the coil 11 can be reduced by switching the control circuit 20, effectively preventing the coil 11 from overheating after prolonged operation.

[0047] Please see Figure 1 and Figure 2 In some embodiments, the control circuit 100 further includes an energy storage module 40, which is connected to a relay 10 and connected to a target power supply system 400 via the relay 10.

[0048] Thus, the energy storage module 40 is used to store electrical energy. The energy storage module 40 is connected to the relay 10 and supplies power to the target power supply system 400 through the relay 10 to ensure the normal operation of the target power supply system 400.

[0049] Further, please refer to Figure 1 and Figure 2 In some embodiments, the target power supply system 400 includes at least one of a vehicle battery and / or an engine; the energy storage module 40 may include at least one of a battery and / or a capacitor, and the energy storage module 40 supplies power to the target power supply system 400 via a relay 10 for ignition of the target power supply system 400.

[0050] In this way, the energy storage module 40 can supply power to the vehicle's battery and engine, and can provide the energy required for ignition of the target power supply system 400 during startup, so as to ensure that the target power supply system 400 can start normally and operate stably.

[0051] Specifically, when the vehicle needs to start in an emergency, the energy storage module 40 can provide electrical energy to the target power supply system 400 through the relay 10. The switching control circuit 20 of the control circuit 100 can be located between the relay 10 and the energy storage module 40, or between the relay 10 and the target power supply system 400.

[0052] Furthermore, in this application embodiment, the specific type of vehicle is not limited. The vehicle can be an electric vehicle, a hybrid vehicle, or a battery-powered vehicle to meet different needs.

[0053] Please see Figure 1 and Figure 2 In some embodiments, the control circuit 100 further includes a conversion circuit 50 and a control unit 30. The conversion circuit 50 is disposed between the energy storage module 40 and the control unit 30. The conversion circuit 50 is used to convert the voltage of the energy storage module 40 into the power supply voltage required by the control unit 30. The control unit 30 is connected to the switching control circuit 20 and is used to control the switching control circuit 20.

[0054] Thus, the electrical energy provided by the energy storage module 40 can be supplied to the control unit 30 after passing through the conversion circuit 50, ensuring that the control unit 30 can operate normally. The control unit 30 can connect to the switching control circuit 20 and send control signals to the switching control circuit 20, thereby adjusting the voltage of the coil 11. This avoids both severe overheating of the coil 11 when the relay 10 is constantly engaged and the problem of loose contact of the relay 10 contacts during ignition.

[0055] Please see Figure 1 and Figure 2 In some embodiments, the control circuit 100 further includes a voltage detection circuit 60 and a control unit 30. The voltage detection circuit 60 is connected to the control unit 30. The voltage detection circuit 60 is used to detect the voltage of the target power supply system 400. The control unit 30 controls the switching control circuit 20 based on the detection result of the voltage detection circuit 60.

[0056] Thus, the voltage detection circuit 60 can be used to detect the voltage of the target power supply system 400 and transmit the voltage detection result to the control unit 30. The control unit 30 can control the switching control circuit 20 according to the detection result, and then change the voltage of the coil 11 by switching the control circuit 20.

[0057] Further, please refer to Figure 1 and Figure 2 In some embodiments, the switching control circuit 20 is also used to provide a first voltage to the coil 11 when the target power supply system 400 is ignited.

[0058] Thus, when the voltage of the target power supply system 400 is insufficient and forced to start is required, the voltage of the coil 11 can be changed by switching the control circuit 20, so that the energy storage module 40 can provide the first voltage to the coil 11, thereby enabling the target power supply system 400 to ignite and start.

[0059] Specifically, the control module can be connected to the voltage detection circuit 60 and detect the voltage of the target power supply system 400 through the voltage detection circuit 60. The control unit 30 can control the switching control circuit 20 according to the detection result, and thus change the voltage of the coil 11 by switching the control circuit 20. When the target power supply system 400 is ignited, the voltage of the coil 11 is switched to the first voltage supply. This can avoid the coil 11 from overheating when the relay 10 is energized for a long time, and also avoid the problem of loose contact of the relay 10 contacts when igniting.

[0060] Please see Figure 1 and Figure 2 In some embodiments, the control circuit 100 further includes a voltage detection circuit 60, which is used to detect the voltage magnitude of the target power supply system 400. When the voltage drop of the target power supply system 400 is detected to exceed a threshold, the switching control circuit 20 sends a first voltage to the coil 11 within a first time range.

[0061] Thus, when the voltage drop of the target power supply system 400 is detected to exceed the threshold, it can be determined that the voltage of the target power supply system 400 is too low and an ignition action is required to ensure the voltage is increased. At the same time as ignition, the switching control circuit 20 sends a first voltage to the coil 11 within the first time range so that the coil 11 has sufficient magnetic force to pull the contact switch 12 to operate.

[0062] Specifically, in this implementation, a threshold can be set in the voltage detection circuit 60. During the process of the voltage detection circuit 60 detecting the voltage of the target power supply system 400, if the voltage drop of the target power supply system 400 exceeds the threshold (e.g., a significant voltage drop at the moment of ignition), the voltage detection circuit 60 can be used to detect when the voltage drop at the vehicle's battery or starter port exceeds the threshold, and the switching control circuit 20 sends a first voltage to the coil 11 within a first time range.

[0063] Please see Figure 1 and Figure 2 In some embodiments, the control circuit 100 further includes a current detection circuit 70, which is used to detect the current magnitude of the energized path through which the energy storage module 40 supplies power to the target power supply system 400. When the current detected by the current detection circuit 70 is greater than a preset current value, the switching control circuit 20 is used to send a first voltage to the coil 11 within a first time range.

[0064] Thus, when the current detection circuit 70 detects that the current in the energized path of the target power supply system 400 is greater than the preset current value, the switching control circuit 20 can send a first voltage to the coil 11 within the first time range to restart the relay 10 and ensure the stable operation of the entire system.

[0065] Specifically, the current detection circuit 70 can be used to detect when the output current of the vehicle's battery or starter port circuit exceeds a preset current value, and then switch the control circuit 20 to send a first voltage to the coil 11 within a first time range. The control circuit 100 can simultaneously detect the target power supply system 400 through both the voltage detection circuit 60 and the current detection circuit 70. When either the voltage or the current exceeds a predetermined range, the control circuit 20 needs to be switched to send a first voltage to the coil 11 within a first time range. In some embodiments, the control circuit 100 can perform detection using only one of the voltage detection circuit 60 and the current detection circuit 70, which reduces the number of circuit components and lowers costs.

[0066] In other embodiments, the control circuit 100 may include a control module that is simultaneously connected to the voltage detection circuit 60, the current detection circuit 70, and the switching control circuit 20. The signals detected by the voltage detection circuit 60 and the current detection circuit 70 can be sent to the control unit 30, which can be used to determine the status of the target power supply system 400. If a problem occurs with either the voltage or current detected by the voltage detection circuit 60 or the current detection circuit 70, the control unit 30 can control the switching control circuit 20 to perform voltage switching.

[0067] Furthermore, in this embodiment, the specific form of the control unit 30 is not limited. The control unit 30 can be a microcontroller, such as a single-chip microcomputer, to meet different needs. A pre-set control program can be written into the control unit 30 so that the control unit 30 can determine the control mode based on the detection results of the control circuit 100.

[0068] Please see Figure 1 and Figure 2 In some implementations, the energy storage module 40 switches to outputting a second voltage after outputting a first voltage within a first time range.

[0069] Thus, since the first voltage is greater than the second voltage, at the beginning of the power supply to relay 10, the switching control circuit 20 can output a larger first voltage to coil 11, so that coil 11 has sufficient magnetic force to pull contact switch 12 to actuate. After contact switch 12 closes, the switching control circuit 20 can output a smaller second voltage to coil 11, so that coil 11 can maintain the closed state of contact switch 12, thereby restarting the target power supply system 400. In this way, it can avoid the coil 11 from overheating when relay 10 is constantly engaged, and it can also avoid the problem of loose contact of relay 10 contacts during ignition.

[0070] Please see Figure 1 and Figure 2 In some implementations, the first time range is 1-2 seconds. For example, the first time range can be 1 second, 1.1 seconds, 1.2 seconds, 1.3 seconds, 1.4 seconds, 1.5 seconds, 1.6 seconds, 1.7 seconds, 1.8 seconds, 1.9 seconds, or 2 seconds.

[0071] Thus, setting the first time range within this range ensures that the coil 11 has enough time to trigger the contact switch 12 to close, ensuring reliable contact of the relay 10 contacts during ignition, while also preventing the coil 11 from overheating due to prolonged engagement of the relay 10.

[0072] Further, please refer to Figure 1 and Figure 2 In some embodiments, the energy storage module 40 outputs a second voltage within a second time range of 20-40 seconds. For example, the second time range can be 20 seconds, 21 seconds, 22 seconds, 23 seconds, 24 seconds, 25 seconds, 26 seconds, 27 seconds, 28 seconds, 29 seconds, 30 seconds, 31 seconds, 32 seconds, 33 seconds, 34 seconds, 35 seconds, 36 seconds, 37 seconds, 38 seconds, 39 seconds, or 40 seconds.

[0073] Thus, setting the second time range within this range ensures that the coil 11 maintains the closed state of the contact switch 12, thereby avoiding the problem of the relay 10 contacts not making a firm contact when igniting.

[0074] Specifically, when the target power supply system 400 is ignited or starts normally, the relay 10 can first supply power with the first voltage within the first time range, and after the first time range ends, it can switch to the second voltage and maintain the second time range. This can avoid the coil 11 from overheating when the relay 10 is energized for a long time, and also avoid the problem of the relay 10 contacts not being firmly connected when igniting.

[0075] Please see Figure 3 The energy storage power supply 200 of this application includes the control circuit 100 of any of the above embodiments.

[0076] In this application embodiment, the specific form of the energy storage power supply 200 is not limited. The energy storage power supply 200 may include vehicle energy storage power supply, household energy storage power supply, outdoor energy storage power supply or other portable power supply to meet different needs.

[0077] Please see Figure 4 The cable 300 of this application includes a housing 303, a control circuit 100 of any of the above embodiments disposed in the housing 303, a first connector 301 and a second connector 302, the first connector 301 and the second connector 302 being used to connect to the target power supply system 400.

[0078] In the control circuit 100, energy storage power supply 200, and cable 300 of this application embodiment, the control circuit 100 includes a relay 10 and a switching control circuit 20. The relay 10 includes a coil 11 and a contact switch 12. The coil 11 generates magnetic force when current flows through it, causing the contact switch 12 to close. The switching control circuit 20 regulates the voltage of the coil 11. When the relay 10 is turned on, the coil 11 receives a first voltage to ensure that the contact switch 12 closes. When the relay 10 maintains its output, the coil 11 receives a second voltage to ensure that the contact switch 12 remains closed. The first voltage is greater than the second voltage. Thus, the control circuit 100 can be forcibly started by the relay 10 to ensure that the energy storage module 40 can be supplied with emergency power. At the initial stage of powering the relay 10, the switching control circuit 20 can output a larger voltage to the coil 11, so that the coil 11 has sufficient magnetic force to pull the contact switch 12 to operate. After the contact switch 12 is closed, the switching control circuit 20 can output a smaller voltage to the coil 11, so that the coil 11 can maintain the closed state of the contact switch 12. In this way, it can avoid the coil 11 from overheating when the relay 10 is energized for a long time, and it can also avoid the problem of the relay 10 contacts not making a firm contact when igniting.

[0079] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0080] In the description of this specification, unless otherwise specified, the term "connection" may include direct connection or indirect connection through other components.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control circuit, characterized in that, include: A relay includes a coil and a contact switch, the coil being used to generate a magnetic force when current flows through it to cause the contact switch to close; A switching control circuit is connected in series with the coil. The switching control circuit is used to adjust the voltage of the coil. When the relay output is turned on, the switching control circuit causes the coil to receive a first voltage to ensure that the contact switch closes. When the relay maintains output, the switching control circuit causes the coil to receive a second voltage to ensure that the contact switch remains closed. The first voltage is greater than the second voltage. An energy storage module is connected to the relay, and the energy storage module is connected to the target power supply system through the relay. The energy storage module supplies power to the target power supply system through the relay to enable the target power supply system to ignite. The control circuit further includes at least one of the following circuits: A voltage detection circuit is used to detect the voltage magnitude of the target power supply system. During the period when the relay maintains the output with the second voltage, when the voltage drop of the target power supply system exceeds a threshold, the switching control circuit switches from outputting the second voltage to sending a first voltage to the coil within a first time range. or A current detection circuit is used to detect the magnitude of the current in the energized path of the energy storage module supplying power to the target power supply system. During the period when the relay maintains the output at the second voltage, if the current of the current detection circuit is detected to be greater than a preset current value, the switching control circuit switches from outputting the second voltage to sending a first voltage to the coil within a first time range.

2. The control circuit according to claim 1, characterized in that, The switching control circuit includes a switching switch and a resistor module. The switching switch and the resistor module are connected in parallel and then connected in series with the coil. When the relay output is turned on, the switching switch is turned on to short-circuit the resistor module. When the relay maintains the output, the switching switch is turned off to allow the resistor module to be connected to the energized path of the coil.

3. The control circuit according to claim 2, characterized in that, The switching control circuit further includes a first control transistor and a second control transistor. The first control transistor is connected to the switching switch and is used to receive signals to control the switching switch to be connected or disconnected. The second control transistor is located in the energized path of the coil and is used to receive signals to turn the relay on or off.

4. The control circuit according to claim 1, characterized in that, The control circuit also includes a control unit, which is connected to the switching control circuit and used to control the switching control circuit.

5. The control circuit according to claim 1, characterized in that, The target power supply system includes at least one of a vehicle battery and / or an engine; The energy storage module includes at least one of a battery and / or a capacitor.

6. The control circuit according to claim 1, characterized in that, The control circuit further includes a conversion circuit and a control unit. The conversion circuit is disposed between the energy storage module and the control unit. The conversion circuit is used to convert the voltage of the energy storage module into the power supply voltage required by the control unit. The control unit is connected to the switching control circuit and is used to control the switching control circuit.

7. The control circuit according to claim 1, characterized in that, The control circuit further includes a voltage detection circuit and a control unit. The voltage detection circuit is connected to the control unit. The voltage detection circuit is used to detect the voltage of the target power supply system. The control unit controls the switching control circuit based on the detection result of the voltage detection circuit.

8. The control circuit according to claim 1, characterized in that, The switching control circuit is also used to provide a first voltage to the coil when the target power supply system ignites.

9. The control circuit according to claim 1, characterized in that, The energy storage module outputs the first voltage and then switches to output the second voltage after a first time range.

10. The control circuit according to claim 9, characterized in that, The first time range is 1-2 seconds.

11. The control circuit according to claim 9, characterized in that, The energy storage module outputs the second voltage within a second time range, which is 20-40 seconds.

12. An energy storage power source, characterized in that, Includes the control circuit described in any one of claims 1-11.

13. A cable, characterized in that, The device includes a housing, a control circuit as described in any one of claims 1-11 disposed within the housing, a first connector and a second connector, wherein the first connector and the second connector are used to connect to a target power supply system.

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