Power supply activation circuit, power supply circuit, and vehicle

Abstract

The utility model provides a power supply activation circuit, a power supply circuit and a vehicle. The power activation circuit comprises a first switching circuit and an activation module. The first switching circuit is electrically connected between the energy storage circuit and the power output circuit, and the energy storage circuit is used for outputting a first voltage. The activation module is electrically connected with the first switching circuit and the energy storage circuit, and the activation module is used for receiving the first voltage from the energy storage circuit and controlling the first switching circuit to be switched on or switched off based on the relation between the duration of receiving the first voltage and the preset duration. The power supply activation circuit can activate the power supply output circuit without setting an external auxiliary power supply, is simple in structure, and can ensure that the power supply output circuit is not activated after the energy storage circuit breaks down because the activation module does not continuously control the conduction of the first switching circuit. Therefore, it can be ensured that the power output circuit is not activated any more when the energy storage circuit breaks down, and the safety is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electronics, in particular to a power activation circuit, a power circuit and a vehicle. Background Art

[0002] Batteries are usually provided to users in the form of battery packs, which include a battery management system (BMS) and a battery module. In the existing technology, an external auxiliary power supply is usually set to activate the BMS, which has a complex structure, and when a problem occurs with the battery device (such as a battery module), the BMS should be disconnected. However, at this time, since the external auxiliary power supply can work normally, the external auxiliary power supply will continue to activate the BMS, so that the BMS cannot be reliably powered off. Utility Model Content

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the utility model provides a power activation circuit, a power circuit and a vehicle.

[0004] To achieve the above object, the first aspect of the utility model provides a power activation circuit, the power activation circuit comprising:

[0005] a first switch circuit, electrically connected between the energy storage circuit and the power output circuit; wherein the energy storage circuit is used to output a first voltage; and

[0006] An activation module is electrically connected to the first switch circuit and the energy storage circuit. The activation module is used to receive the first voltage from the energy storage circuit and control the first switch circuit to be turned on or off based on the relationship between the duration of receiving the first voltage and a preset duration.

[0007] The power activation circuit provided by the utility model provides an activation module electrically connected to the energy storage circuit, and controls the first switch circuit to be turned on or off based on the relationship between the duration of receiving the first voltage and the preset duration through the activation module. The power output circuit can be activated without providing an external auxiliary power supply. The circuit structure is simple, and because the activation module does not continuously control the conduction of the first switch circuit, it can be ensured that the energy storage circuit stops working after a fault occurs and the power output circuit is no longer activated, thereby ensuring that the power output circuit is no longer activated when a fault occurs in the energy storage circuit, and having higher safety.

[0008] In some embodiments, the first switching circuit includes a first connection end, a second connection end and a control end, the first connection end is electrically connected to the energy storage circuit and receives a first voltage output by the energy storage circuit, the second connection end is electrically connected to the power supply output circuit, and the control end is electrically connected to the activation module.

[0009] In some embodiments, the activation module is used to receive the first voltage and when the duration of receiving the first voltage is greater than zero and less than a preset duration, output a first conduction signal to the control end of the first switch circuit to turn on the first switch circuit, so that the energy storage circuit provides the first voltage to the power output circuit through the first switch circuit to activate the power output circuit; the activation module is also used to output a first disconnection signal to the control end of the first switch circuit to disconnect the first switch circuit when the first voltage is not received or the duration of receiving the first voltage is greater than or equal to the preset duration.

[0010] In some embodiments, the activation module includes:

[0011] A voltage divider circuit, electrically connected between the positive output terminal and the negative output terminal of the energy storage circuit, the voltage divider circuit comprising a voltage divider node;

[0012] a first capacitor, wherein a first end of the first capacitor is electrically connected to the voltage division node, and a second end of the first capacitor is electrically connected to a control end of the first switch circuit; and

[0013] The discharge circuit is electrically connected between the second end of the first capacitor and the negative output end of the energy storage circuit.

[0014] In some embodiments, the voltage divider circuit includes:

[0015] A first resistor, electrically connected between the positive output terminal of the energy storage circuit and the voltage division node; and

[0016] The second resistor is electrically connected between the negative output terminal of the energy storage circuit and the voltage division node.

[0017] In some embodiments, the bleeder circuit includes a third resistor.

[0018] In some embodiments, the bleeder circuit comprises:

[0019] a second capacitor; and

[0020] A bidirectional voltage regulator diode is connected in parallel with the second capacitor between the second end of the first capacitor and the negative output end of the energy storage circuit.

[0021] In some embodiments, the activation module also includes a first clamping circuit, which is electrically connected between the control end of the first switching circuit and the negative output end of the energy storage circuit, and is used to clamp the voltage of the control end of the first switching circuit to below a first preset voltage.

[0022] In some embodiments, the first clamping circuit includes at least one of a voltage stabilizing diode and a voltage stabilizing chip.

[0023] In some embodiments, the activation module further includes a signal amplification module, which is electrically connected between the second end of the first capacitor and the control end of the first switch circuit and is used to enhance the driving capability of the first conduction signal.

[0024] In some embodiments, the signal amplification module includes:

[0025] a first transistor, wherein an emitter of the first transistor is electrically connected to the second end of the first capacitor, and a collector of the first transistor is electrically connected to the control end of the first switch circuit; and

[0026] A second transistor, wherein the emitter of the second transistor is electrically connected to the base of the first transistor, the collector of the second transistor is electrically connected to the control end of the first switch circuit, and the base of the second transistor is electrically connected to the emitter of the first transistor.

[0027] In some embodiments, the activation module also includes a second clamping circuit, which is electrically connected between the base of the second transistor and the negative output terminal of the energy storage circuit, and is used to clamp the voltage of the base of the second transistor to below a second preset voltage.

[0028] The second aspect of the utility model further provides a power supply circuit, which includes a storage circuit, a power output circuit and the power activation circuit described in the first aspect.

[0029] In some embodiments, the power output circuit includes a DC-DC conversion circuit, and the DC-DC conversion circuit is used to receive the first voltage from the power circuit and convert it into a second voltage when activated.

[0030] In some embodiments, the power supply circuit further comprises:

[0031] A second switch circuit comprises a first connection terminal, a second connection terminal and a control terminal, wherein the first connection terminal of the second switch circuit is electrically connected to the energy storage circuit, and the second connection terminal of the second switch circuit is electrically connected to the power output circuit; and

[0032] The controller is electrically connected to the control end of the DC-DC conversion circuit and the second switch circuit, and is used to receive the second voltage output by the DC-DC conversion circuit to work, and output a second conduction signal to the control end of the second switch circuit to turn on the second switch circuit, so that the DC-DC conversion circuit continues to receive the first voltage output by the energy storage circuit through the second switch circuit.

[0033] In some embodiments, the energy storage circuit comprises:

[0034] Energy storage components; and

[0035] The third switch circuit is electrically connected between the energy storage element and the power activation circuit, and is used to conduct or disconnect the electrical connection between the energy storage element and the power activation circuit.

[0036] The third aspect of the present invention further provides a vehicle, the vehicle comprising the power supply circuit described in the second aspect.

[0037] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the topological structure of the power supply circuit provided by the embodiment of the utility model;

[0039] Figure 2 This is a schematic diagram of the first circuit structure of the power supply circuit provided by the embodiment of the utility model;

[0040] Figure 3 This is a second circuit structure diagram of the power supply circuit provided by the embodiment of the utility model;

[0041] Figure 4 This is a third circuit structure schematic diagram of the power supply circuit provided by the embodiment of the utility model;

[0042] Figure 5 It is a structural schematic diagram of a power supply circuit provided in an embodiment of the utility model.

[0043] The following are the descriptions of the reference numerals:

[0044] Power supply circuit 100

[0045] Power supply activation circuit 10

[0046] Energy storage circuit 20

[0047] Power output circuit 30

[0048] Controller 40

[0049] Activate Module 11

[0050] The first switch circuit Q1

[0051] Voltage divider circuit 111

[0052] The first capacitor C1

[0053] Discharge circuit 112

[0054] The first resistor R1

[0055] The second resistor R2

[0056] The third resistor R3

[0057] The fourth resistor R4

[0058] The second capacitor C2

[0059] Bidirectional voltage regulator diode D3

[0060] First clamp circuit D1

[0061] Signal amplification module 113

[0062] The first transistor Q3

[0063] The second transistor Q4

[0064] Second clamp circuit D2

[0065] The second switch circuit Q2

[0066] Energy storage element 21

[0067] The third switch circuit S3

[0068] Vehicle 1000

[0069] The following specific implementation manner will illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0071] In addition, the terms "first", "second", etc. in the specification of the utility model are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0072] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0073] See also Figure 1 , Figure 1 The topological structure diagram of the power supply circuit provided by the embodiment of the utility model is shown in FIG. The utility model provides a power supply activation circuit 10 , which includes a first switch circuit Q1 and an activation module 11 .

[0074] The first switch circuit Q1 is electrically connected between the energy storage circuit 20 and the power output circuit 30. The energy storage circuit 20 is used to output a first voltage.

[0075] The activation module 11 is electrically connected to the first switch circuit Q1 and the energy storage circuit 20. The activation module 11 is used to receive the first voltage from the energy storage circuit 20 and control the first switch circuit Q1 to be turned on or off based on the relationship between the duration of receiving the first voltage and the preset duration.

[0076] The power activation circuit 10 provided by the utility model is provided with an activation module 11 electrically connected to the energy storage circuit 20, and the activation module 11 controls the first switch circuit Q1 to be turned on or off based on the relationship between the duration of receiving the first voltage and the preset duration. The power output circuit 30 can be activated without providing an external auxiliary power supply. The circuit structure is simple. Moreover, since the activation module 11 does not continuously control the first switch circuit Q1 to be turned on, it can be ensured that the energy storage circuit 20 stops working after a fault occurs and the power output circuit 30 is no longer activated, thereby ensuring that the power output circuit 30 is no longer activated when a fault occurs in the energy storage circuit 20, and the safety is higher.

[0077] In some embodiments, the first switching circuit Q1 includes a first connection terminal, a second connection terminal and a control terminal, the first connection terminal is electrically connected to the energy storage circuit 20 and receives the first voltage output by the energy storage circuit 20, the second connection terminal is electrically connected to the power output circuit 30, and the control terminal is electrically connected to the activation module.

[0078] In some embodiments, the activation module 11 is used to receive the first voltage and output a first on signal to the control end of the first switch circuit Q1 when the duration of receiving the first voltage is greater than zero and less than a preset duration, so that the first switch circuit Q1 is turned on, so that the energy storage circuit 20 provides the first voltage to the power output circuit 30 through the first switch circuit Q1 to activate the power output circuit 30. The activation module 11 is also used to output a first off signal to the control end of the first switch circuit Q1 when the first voltage is not received or the duration of receiving the first voltage is greater than or equal to the preset duration, so that the first switch circuit Q1 is turned off.

[0079] Wherein, the first switch circuit Q1 is a switch circuit that is turned on at a high level. Exemplarily, the first switch circuit Q1 includes at least one of a MOSFET (metal-oxide-semiconductor field-effect transistor), an IGBT (insulated gate bipolar transistor), a silicon carbide switch device, a thyristor switch device, and a gallium arsenide switch device. In the utility model, the first switch circuit Q1 adopts an N-type MOSFET, and the first connection terminal, the second connection terminal, and the control terminal of the first switch circuit Q1 correspond to the source, the drain, and the gate of the N-type MOSFET one by one. The N-type MOSFET is turned on when the difference between the gate voltage and the source voltage is higher than its threshold voltage, and is turned off when the difference between the gate voltage and the source voltage is lower than its threshold voltage.

[0080] Please also read Figure 2 to Figure 4 , Figure 2 This is a schematic diagram of the first circuit structure of the power supply circuit provided by the embodiment of the utility model; Figure 3 This is a second circuit structure diagram of the power supply circuit provided by the embodiment of the utility model; Figure 4 This is a third circuit structure schematic diagram of the power supply circuit provided by the embodiment of the utility model.

[0081] In some embodiments, the activation module 11 includes a voltage divider circuit 111 , a first capacitor C1 , and a discharge circuit 112 .

[0082] The voltage divider circuit 111 is electrically connected between the positive output terminal and the negative output terminal of the energy storage circuit 20 , and the voltage divider circuit 111 includes a voltage divider node.

[0083] A first end of the first capacitor C1 is electrically connected to the voltage division node, and a second end of the first capacitor C1 is electrically connected to the control end of the first switch circuit Q1.

[0084] The discharge circuit 112 is electrically connected between the second end of the first capacitor C1 and the negative output end of the energy storage circuit 20 .

[0085] In the process of the voltage divider circuit 111 receiving the first voltage, the first capacitor C1 is used to receive the first voltage through the voltage divider circuit 111 and the discharge circuit 112 for charging. When the charging duration of the first capacitor C1 is greater than zero and less than a preset duration, the voltage at the second end is higher than the threshold voltage of the first switch circuit Q1, thereby outputting a first on signal to the control end of the first switch circuit Q1. When the charging duration of the first capacitor C1 is greater than or equal to the preset duration, the voltage at the second end drops below the threshold voltage, thereby outputting a first off signal to the control end of the first switch circuit Q1. The first on signal is a voltage signal having a voltage value higher than the threshold voltage, and the first off signal is a voltage signal having a voltage value lower than the threshold voltage.

[0086] Furthermore, if Figure 2 As shown, in one implementation, the voltage divider circuit 111 includes a first resistor R1 and a second resistor R2.

[0087] The first resistor R1 is electrically connected between the positive output terminal of the energy storage circuit 20 and the voltage division node.

[0088] The second resistor R2 is electrically connected between the negative output terminal of the energy storage circuit 20 and the voltage division node.

[0089] In some embodiments, the discharge circuit 112 includes a third resistor R3 .

[0090] During operation, when the energy storage circuit 20 starts to output the first voltage, the voltage across the first capacitor C1 cannot change suddenly and remains at 0, that is, the first capacitor C1 is equivalent to a wire. At this time, the voltage at the second end of the first capacitor C1 is U R3 :

[0091]

[0092] Among them, U R3 >Vth, so that the second end of the first capacitor C1 outputs a first conduction signal to the control end of the first switch circuit Q1, controls the first switch circuit Q1 to conduct, and then enables the energy storage circuit 20 to output a first voltage to the power output circuit 30 through the first switch circuit Q1 to activate the power output circuit 30. IN is the voltage value of the first voltage, and Vth is the threshold voltage of the first switch circuit Q1.

[0093] As the duration of the first voltage received by the activation module 11 extends, the first capacitor C1 is charged by receiving the first voltage through the first resistor R1 and the third resistor R3. As a result, the voltage at the second terminal of the first capacitor C1 gradually decreases until it drops to 0 when the first capacitor C1 is fully charged. After the first capacitor C1 is fully charged, since the first capacitor C1 has the characteristic of blocking direct current and passing alternating current, that is, the first capacitor C1 is equivalent to an open circuit. At this time, the voltage at the second terminal of the first capacitor C1 is 0 < Vth. Thus, the second terminal of the first capacitor C1 outputs a first disconnection signal to the control terminal of the first switching circuit Q1, causing the first switching circuit Q1 to disconnect.

[0094] Among them, after the first capacitor C1 is fully charged, the voltage at the first terminal of the first capacitor C1 is U R2 :

[0095]

[0096] Among them, the preset duration is the charging duration required for the voltage at the second terminal of the first capacitor C1 to drop from U R3 to Vth, which is determined by the resistance values of the first resistor R1 to the third resistor R3 and the capacitance value of the first capacitor C1. That is to say, the preset duration can be adjusted by changing at least one of the resistance values of the first resistor R1 to the third resistor R3 and the capacitance value of the first capacitor C1.

[0097] After the energy storage circuit 20 stops outputting the first voltage, the first capacitor C1 can discharge through the second resistor R2 and the third resistor R3. During the discharging process, the voltage at the second terminal of the first capacitor C1 always remains 0, continuously outputting a first disconnection signal to the control terminal of the first switching circuit Q1.

[0098] In this way, by using a resistor and a capacitor to form the activation module 11, different preset durations can be achieved by flexibly selecting the resistance value and capacitance value combinations, which can be applicable to application scenarios of different voltage platforms, and there is no need for a control circuit such as logical judgment. The circuit structure is simple, the cost is low, and the reliability is high.

[0099] Furthermore, in some embodiments, the activation module 11 further includes a first clamping circuit D1. The first clamping circuit D1 is electrically connected between the control terminal of the first switching circuit Q1 and the negative output terminal of the energy storage circuit 20, and is used to clamp the voltage at the control terminal of the first switching circuit Q1 below a first preset voltage, and the value of the first preset voltage is higher than the threshold voltage.

[0100] Exemplarily, the first clamping circuit D1 includes at least one of a zener diode and a voltage regulator chip.

[0101] When the voltage level of the first voltage output by the energy storage circuit 20 is relatively high, U R3The voltage value of the first switch circuit Q1 may be high, that is, the voltage value of the first conduction signal output by the second end of the first capacitor C1 to the control end of the first switch circuit Q1 is high, which may cause the first switch circuit Q1 to be broken down by the high voltage. In this embodiment, by setting the first clamping circuit D1 to clamp the voltage of the control end of the first switch circuit Q1 to below the first preset voltage, the first switch circuit Q1 can be protected, thereby improving the stability of the power activation circuit 10.

[0102] like Figure 3-4 As shown, in some embodiments, the discharge circuit 112 includes a second capacitor C2 and a bidirectional voltage regulator diode D3 , and the bidirectional voltage regulator diode D3 and the second capacitor C2 are connected in parallel between the second end of the first capacitor C1 and the negative output end of the energy storage circuit 20 .

[0103] Furthermore, in some embodiments, the activation module 11 further includes a signal amplification module 113 , which is electrically connected between the second end of the first capacitor C1 and the control end of the first switch circuit Q1 , and is used to enhance the driving capability of the first conduction signal.

[0104] In this way, the turn-on speed of the first switch circuit Q1 can be accelerated, the conduction loss of the first switch circuit Q1 can be reduced, and the stability of the system can be improved.

[0105] Exemplarily, the signal amplification module 113 includes a Darlington transistor, and specifically, the Darlington transistor includes a first transistor Q3 and a second transistor Q4.

[0106] The emitter of the first transistor Q3 is electrically connected to the second end of the first capacitor C1 , and the collector of the first transistor Q3 is electrically connected to the control end of the first switch circuit Q1 .

[0107] The emitter of the second transistor Q4 is electrically connected to the base of the first transistor Q3 , the collector of the second transistor Q4 is electrically connected to the control end of the first switch circuit Q1 , and the base of the second transistor Q4 is electrically connected to the emitter of the first transistor Q3 .

[0108] Furthermore, the signal amplifying module 113 further includes a fourth resistor R4 , and the fourth resistor R4 is electrically connected between the base of the second transistor Q4 and the emitter of the first transistor Q3 .

[0109] In some embodiments, the activation module 11 also includes a second clamping circuit D2, which is electrically connected between the base of the second transistor Q4 and the negative output terminal of the energy storage circuit 20, and is used to clamp the voltage of the base of the second transistor Q4 to below the second preset voltage, thereby protecting the first transistor Q3 and the second transistor Q4.

[0110] Exemplarily, the second clamping circuit D2 includes at least one of a voltage stabilizing diode and a voltage stabilizing chip.

[0111] Please refer again Figure 1 to Figure 4 Based on the same concept, the utility model also provides a power supply circuit 100, which includes a storage circuit 20, a power output circuit 30 and a power activation circuit 10 of any of the above embodiments.

[0112] The power supply circuit 100 provided by the utility model is provided with an activation module 11 electrically connected to the energy storage circuit 20, and the activation module 11 controls the first switch circuit Q1 to be turned on or off based on the relationship between the duration of receiving the first voltage and the preset duration. The power supply output circuit 30 can be activated without providing an external auxiliary power supply. The circuit structure is simple. Moreover, since the activation module 11 does not continuously control the first switch circuit Q1 to be turned on, it can be ensured that the energy storage circuit 20 stops working after a fault occurs and the power supply output circuit 30 is no longer activated, thereby ensuring that the power supply output circuit 30 is no longer activated when a fault occurs in the energy storage circuit 20, and the safety is higher.

[0113] In some embodiments, the power output circuit 30 includes a DC-DC conversion circuit, which is configured to receive a first voltage from the power circuit 100 and convert it into a second voltage when activated.

[0114] In some embodiments, the power circuit 100 further includes a second switch circuit Q2 and a controller 40 .

[0115] The second switch circuit Q2 includes a first connection terminal, a second connection terminal and a control terminal. The first connection terminal of the second switch circuit Q2 is electrically connected to the energy storage circuit 20 , and the second connection terminal of the second switch circuit Q2 is electrically connected to the power output circuit 30 .

[0116] The controller 40 is electrically connected to the DC-DC conversion circuit and the control end of the second switch circuit Q2, and is used to receive the second voltage output by the DC-DC conversion circuit and output a second conduction signal to the control end of the second switch circuit Q2, so that the second switch circuit Q2 is turned on, so that the DC-DC conversion circuit continues to receive the first voltage output by the energy storage circuit 20 through the second switch circuit Q2.

[0117] When the energy storage circuit 20 fails and the DC-DC conversion circuit loses power and cannot output the second voltage, the controller 40 cannot output the second conduction signal, so that the second switch circuit Q2 cannot be turned on.

[0118] In this way, after the DC-DC conversion circuit is fully activated, the controller 40 controls the second switch circuit Q2 to continuously conduct the electrical connection between the DC-DC conversion circuit and the energy storage circuit 20, so that the energy storage circuit 20 continuously supplies power to the DC-DC conversion circuit through the second switch circuit Q2. In addition, if a fault occurs in the energy storage circuit 20, the controller 40 can also power off the DC-DC conversion circuit, which is safer.

[0119] In some embodiments, the energy storage circuit 20 includes an energy storage element 21 and a third switch circuit S3. The third switch circuit S3 is electrically connected between the energy storage element 21 and the power activation circuit 10, and is used to open or close the electrical connection between the energy storage element 21 and the power activation circuit 10.

[0120] The energy storage circuit 20 starts to output the first voltage when the third switch circuit S3 is closed.

[0121] Exemplarily, the energy storage element 21 includes a battery, an energy storage capacitor, and the like.

[0122] Exemplarily, the third switch circuit S3 includes at least one of a circuit breaker, an air switch, and a relay.

[0123] Exemplarily, the second switch circuit Q2 includes at least one of a MOSFET, an IGBT, a silicon carbide switch device, a thyristor switch device, and a gallium arsenide switch device.

[0124] See also Figure 5 Based on the same concept, the present invention also provides a vehicle 1000, which includes the power circuit 100 of any of the above embodiments.

[0125] The vehicle 1000 provided by the utility model is provided with an activation module 11 electrically connected to the energy storage circuit 20, and the activation module 11 controls the first switch circuit Q1 to be turned on or off based on the relationship between the duration of receiving the first voltage and the preset duration. The power output circuit 30 can be activated without providing an external auxiliary power supply. The circuit structure is simple. Moreover, since the activation module 11 does not continuously control the first switch circuit Q1 to be turned on, it can be ensured that the energy storage circuit 20 stops working after a fault occurs and the power output circuit 30 is no longer activated, thereby ensuring that the power output circuit 30 is no longer activated when a fault occurs in the energy storage circuit 20, and having higher safety.

[0126] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power activation circuit, characterized in that: The power activation circuit comprises: a first switch circuit, electrically connected between the energy storage circuit and the power output circuit; wherein the energy storage circuit is used to output a first voltage; and An activation module is electrically connected to the first switch circuit and the energy storage circuit. The activation module is used to receive the first voltage from the energy storage circuit and control the first switch circuit to be turned on or off based on the relationship between the duration of receiving the first voltage and a preset duration.

2. The power activation circuit according to claim 1, characterized in that: The first switch circuit includes a first connection end, a second connection end and a control end. The first connection end is electrically connected to the energy storage circuit and receives a first voltage output by the energy storage circuit. The second connection end is electrically connected to the power supply output circuit. The control end is electrically connected to the activation module.

3. The power activation circuit as claimed in claim 2, characterized in that: The activation module is used to receive the first voltage and output a first conduction signal to the control end of the first switch circuit when the duration of receiving the first voltage is greater than zero and less than a preset duration, so that the first switch circuit is turned on, so that the energy storage circuit provides the first voltage to the power output circuit through the first switch circuit to activate the power output circuit; The activation module is also used to output a first disconnection signal to the control end of the first switch circuit to disconnect the first switch circuit when the first voltage is not received or the duration of receiving the first voltage is greater than or equal to the preset duration.

4. The power activation circuit as claimed in claim 3, characterized in that: The activation module comprises: A voltage divider circuit, electrically connected between the positive output terminal and the negative output terminal of the energy storage circuit, the voltage divider circuit comprising a voltage divider node; a first capacitor, wherein a first end of the first capacitor is electrically connected to the voltage division node, and a second end of the first capacitor is electrically connected to a control end of the first switch circuit; and The discharge circuit is electrically connected between the second end of the first capacitor and the negative output end of the energy storage circuit.

5. The power activation circuit as claimed in claim 4, characterized in that: The voltage divider circuit comprises: A first resistor, electrically connected between the positive output terminal of the energy storage circuit and the voltage division node; and The second resistor is electrically connected between the negative output terminal of the energy storage circuit and the voltage division node.

6. The power activation circuit as claimed in claim 4, characterized in that: The discharge circuit includes a third resistor.

7. The power activation circuit as claimed in claim 4, characterized in that: The discharge circuit comprises: a second capacitor; and A bidirectional voltage regulator diode is connected in parallel with the second capacitor between the second end of the first capacitor and the negative output end of the energy storage circuit.

8. The power activation circuit as claimed in claim 4, characterized in that: The activation module also includes a first clamping circuit, which is electrically connected between the control end of the first switch circuit and the negative output end of the energy storage circuit, and is used to clamp the voltage of the control end of the first switch circuit to below a first preset voltage.

9. The power activation circuit as claimed in claim 8, characterized in that: The first clamping circuit includes at least one of a voltage stabilizing diode and a voltage stabilizing chip.

10. The power activation circuit according to claim 4, characterized in that: The activation module further includes a signal amplification module, which is electrically connected between the second end of the first capacitor and the control end of the first switch circuit and is used to enhance the driving capability of the first conduction signal.

11. The power activation circuit according to claim 10, characterized in that: The signal amplification module comprises: a first transistor, wherein an emitter of the first transistor is electrically connected to the second end of the first capacitor, and a collector of the first transistor is electrically connected to the control end of the first switch circuit; and A second transistor, wherein the emitter of the second transistor is electrically connected to the base of the first transistor, the collector of the second transistor is electrically connected to the control end of the first switch circuit, and the base of the second transistor is electrically connected to the emitter of the first transistor.

12. The power activation circuit according to claim 11, characterized in that: The activation module also includes a second clamping circuit, which is electrically connected between the base of the second transistor and the negative output terminal of the energy storage circuit and is used to clamp the voltage of the base of the second transistor to below a second preset voltage.

13. A power supply circuit, characterized in that: The power supply circuit includes a storage circuit, a power output circuit and a power activation circuit as claimed in any one of claims 1 to 12.

14. The power supply circuit according to claim 13, characterized in that: The power output circuit includes a DC-DC conversion circuit, which is used to receive the first voltage from the power circuit and convert it into a second voltage when activated.

15. The power supply circuit according to claim 14, characterized in that: The power supply circuit also includes: A second switch circuit comprises a first connection terminal, a second connection terminal and a control terminal, wherein the first connection terminal of the second switch circuit is electrically connected to the energy storage circuit, and the second connection terminal of the second switch circuit is electrically connected to the power output circuit; and The controller is electrically connected to the control end of the DC-DC conversion circuit and the second switch circuit, and is used to receive the second voltage output by the DC-DC conversion circuit to work, and output a second conduction signal to the control end of the second switch circuit to turn on the second switch circuit, so that the DC-DC conversion circuit continues to receive the first voltage output by the energy storage circuit through the second switch circuit.

16. The power supply circuit according to claim 13, characterized in that: The energy storage circuit comprises: Energy storage components; and The third switch circuit is electrically connected between the energy storage element and the power activation circuit, and is used to conduct or disconnect the electrical connection between the energy storage element and the power activation circuit.

17. A vehicle, characterized in that: The vehicle comprises the power supply circuit according to any one of claims 13 to 16.

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