A DC-DC converter

Abstract

The invention discloses a DC-DC converter, which relates to the field of voltage conversion. The DC-DC converter comprises: a battery power supply module, which is used to supply voltage; a boost power supply module, which is used to boost the voltage to supply power to an electric device when the voltage supplied by the battery power supply module is higher than a first threshold value; when the voltage supplied by the battery power supply module is lower than the first threshold value, triggering the conduction of an amplifying and boosting module. The beneficial effects of the invention are as follows: the invention outputs a boosted voltage by setting a boost power supply module to meet the charging demand of the electric device; the amplifying and boosting module is set, which is started when the battery voltage is insufficient to drive the boost power supply module, and the battery is first boosted once, and then the boost power supply module is used to perform a secondary boost to meet the charging demand of the electric device, and when the battery is about to be over-discharged, the amplifying and boosting module is stopped from being supplied with power to avoid affecting the battery service life; and a motor working module is set, which starts an alarm when the output voltage of the boost power supply module is small to prompt an abnormality.

Description

Technical Field

[0001] The invention relates to the field of voltage conversion, in particular to a DC-DC converter. Background Art

[0002] Nowadays, many electrical devices are small in size, and users carry them when traveling, and often also carry related charging devices. The disadvantage is that the voltage of the battery of the charging device gradually decreases as the power supply continues. When the voltage is low, it can no longer meet the charging needs of the electrical devices. There is a lack of emergency measures and improvements are needed. Summary of the invention

[0003] The object of the present invention is to provide a DC-DC converter to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A DC-DC converter, comprising:

[0006] A battery powered module for outputting a supply voltage;

[0007] A boost power supply module, used to boost the voltage to supply power to the power-consuming device when the voltage supplied by the battery power supply module is higher than a first threshold; when the voltage supplied by the battery power supply module is lower than the first threshold, trigger the boost module to conduct, receive the voltage output by the boost module, and boost the voltage to supply power to the power-consuming device;

[0008] The boost module is used to boost the voltage after clamping to supply power to the boost module when the voltage supplied by the battery power module is higher than the second threshold and lower than the first threshold; and stop absorbing the voltage supplied by the battery power module when the voltage supplied by the battery power module is lower than the second threshold;

[0009] The motor working module is used to cool down the motor when the boost module is working, and to cool down the motor and indicate abnormality when the output voltage of the boost power supply module is lower than the set value;

[0010] The output end of the battery power supply module is connected to the first input end of the boost power supply module and the first input end of the amplifier boost module, the first output end of the boost power supply module is connected to the second input end of the amplifier boost module, the second output end of the boost power supply module is connected to the first input end of the motor working module, the first output end of the amplifier boost module is connected to the second input end of the boost power supply module, and the second output end of the amplifier boost module is connected to the second input end of the motor working module.

[0011] As a further solution of the present invention: the boost power supply module includes:

[0012] A conduction control unit is used to detect the supply voltage of the battery power supply module, and when the supply voltage is higher than a first threshold, conduct the supply voltage to the BOOST boost unit; when the supply voltage of the battery power supply module is lower than the first threshold, trigger the boost module to conduct;

[0013] The BOOST boost unit is used to adjust the boost amplitude based on the PWM signal when supplying voltage input, and supply power to the electrical equipment after completing the boost;

[0014] The input end of the conduction control unit is connected to the output end of the battery power supply module, the first output end of the conduction control unit is connected to the second input end of the amplifier boost module, the second output end of the conduction control unit is connected to the input end of the BOOST boost unit, and the output end of the BOOST boost unit is connected to the first input end of the motor working module.

[0015] As a further solution of the present invention: the conduction control unit includes a first diode, a second diode, and a first inverter, the cathode of the first diode is connected to the output end of the battery power supply module, the anode of the first diode is connected to the anode of the second diode and the input end of the first inverter, the output end of the first inverter is connected to the second input end of the amplifier boost module, and the cathode of the second diode is connected to the input end of the BOOST boost unit.

[0016] As a further solution of the present invention: the BOOST boost unit includes a first inductor, a second MOS tube, a third diode, and a first capacitor. One end of the first inductor is connected to the second output end of the conduction control unit, the other end of the first inductor is connected to the D pole of the second MOS tube and the positive pole of the third diode, the S pole of the second MOS tube is grounded, the G pole of the second MOS tube is connected to the PWM signal, the cathode of the third diode is connected to one end of the first capacitor and the first input end of the motor working module, and the other end of the first capacitor is grounded.

[0017] As a further solution of the present invention: the voltage-enhancing module comprises:

[0018] The clamping energy storage unit is used to supply voltage to the boost clamping unit; when the supply voltage of the battery power module is higher than the second threshold and lower than the first threshold, the unit receives a trigger signal from the boost power module, and then receives the supply voltage of the battery power module, stores electric energy after clamping; when the supply voltage of the battery power module is lower than the second threshold, the unit stops absorbing the supply voltage of the battery power module;

[0019] The boost clamping unit is used to first boost the voltage and then clamp the voltage after the voltage is input, and to supply power to the boost power supply module after the boost power supply module stops receiving the supply voltage from the battery power supply module;

[0020] The first input end of the voltage clamping energy storage unit is connected to the output end of the battery power supply module, the second input end of the voltage clamping energy storage unit is connected to the first output end of the boost power supply module, the output end of the voltage clamping energy storage unit is connected to the input end of the boost voltage clamping unit, the first output end of the boost voltage clamping unit is connected to the second input end of the boost power supply module, and the second output end of the boost voltage clamping unit is connected to the second input end of the motor working module.

[0021] As a further solution of the present invention: the clamping energy storage unit includes a first MOS tube, a first resistor, a fourth diode, a fifth diode, and a super capacitor. The D pole of the first MOS tube is connected to the output end of the battery power supply module, the G pole of the first MOS tube is connected to the first output end of the boost power supply module, the S pole of the first MOS tube is connected to one end of the first resistor, the other end of the first resistor is connected to the cathode of the fourth diode and the anode of the fifth diode, the anode of the fourth diode is grounded, the cathode of the fifth diode is connected to one end of the super capacitor and the input end of the boost clamping unit, and the other end of the super capacitor is grounded.

[0022] As a further solution of the present invention: the boost clamping unit includes a second resistor, a third transistor, a transformer, a seventh diode, a second capacitor, a sixth resistor, an eleventh diode, and a twelfth diode. One end of the input end of the transformer is connected to one end of the second resistor and the output end of the clamping energy storage unit, the other end of the input end of the transformer is connected to the collector of the third transistor, the other end of the second resistor is connected to the first end of the output end of the transformer, the emitter of the third transistor is grounded, the base of the third transistor is connected to the second end of the output end of the transformer, the third end of the output end of the transformer is connected to the positive electrode of the seventh diode, the negative electrode of the seventh diode is connected to one end of the second capacitor and one end of the sixth resistor, the other end of the second capacitor is grounded, the other end of the sixth resistor is connected to the negative electrode of the eleventh diode, the positive electrode of the twelfth diode, and the second input end of the motor working module, the positive electrode of the eleventh diode is grounded, and the negative electrode of the twelfth diode is connected to the second input end of the boost power supply module.

[0023] As a further scheme of the present invention: the motor working module includes a third resistor, a fourth resistor, a fifth resistor, a sixth diode, a second amplifier, an eighth diode, a ninth diode, a tenth diode, and a motor. One end of the third resistor is connected to one end of the fifth resistor and the second output end of the boost power supply module, the other end of the third resistor is connected to one end of the fourth resistor and the inverting end of the second amplifier, the other end of the fourth resistor is grounded, the other end of the fifth resistor is connected to the cathode of the sixth diode and the non-inverting end of the second amplifier, the anode of the sixth diode is grounded, the output end of the second amplifier is connected to the anode of the eighth diode, the cathode of the eighth diode is connected to the anode of the ninth diode, the cathode of the ninth diode is connected to the cathode of the tenth diode and one end of the motor, the other end of the motor is grounded, and the anode of the tenth diode is connected to the second output end of the amplifier and boost module.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a boost power supply module to output a boost voltage to meet the charging needs of electrical equipment; sets an amplifying boost module, which is started when the battery voltage is insufficient to drive the boost power supply module, and first boosts the battery once, and then performs a secondary boost through the boost power supply module to meet the charging needs of electrical equipment, and when the battery is about to be over-discharged, stops supplying power to the amplifying boost module to avoid affecting the battery life; sets a motor working module, and starts an alarm when the output voltage of the boost power supply module is small, indicating an abnormality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a DC-DC converter.

[0026] Figure 2 A circuit diagram of a DC-DC converter.

[0027] Figure 3 This is the circuit diagram of the boost power supply module.

[0028] Figure 4 This is the circuit diagram of the amplifier and boost module.

[0029] Figure 5 This is the circuit diagram of the motor working module. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] See also Figure 1 , a DC-DC converter, comprising:

[0032] A battery power supply module 1, used for outputting a supply voltage;

[0033] The boost power supply module 2 is used to boost the voltage to supply power to the electric device when the voltage supplied by the battery power supply module 1 is higher than the first threshold value; when the voltage supplied by the battery power supply module 1 is lower than the first threshold value, the boost module 3 is triggered to turn on, and the voltage output by the boost module 3 is received, and the voltage is boosted to supply power to the electric device;

[0034] The boost module 3 is used for boosting the voltage after clamping to supply power to the boost power module 2 when the voltage supplied by the battery power module 1 is higher than the second threshold and lower than the first threshold; and stops absorbing the voltage supplied by the battery power module 1 when the voltage supplied by the battery power module 1 is lower than the second threshold;

[0035] The motor working module 4 is used to cool down the motor when the boost module 3 is working, and to cool down the motor and indicate abnormality when the output voltage of the boost power supply module 2 is lower than the set value;

[0036] The output end of the battery power supply module 1 is connected to the first input end of the boost power supply module 2 and the first input end of the amplifying boost module 3, the first output end of the boost power supply module 2 is connected to the second input end of the amplifying boost module 3, the second output end of the boost power supply module 2 is connected to the first input end of the motor working module 4, the first output end of the amplifying boost module 3 is connected to the second input end of the boost power supply module 2, and the second output end of the amplifying boost module 3 is connected to the second input end of the motor working module 4.

[0037] In the specific embodiment: please refer to Figure 2 The battery power supply module 1 includes a battery E1, a negative electrode of the battery E1 is grounded, and a positive electrode of the battery E1 outputs a voltage.

[0038] In this example: See Figure 1 and Figure 2 , the boost power supply module 2 includes:

[0039] A conduction control unit is used to detect the supply voltage of the battery power supply module 1, and when the supply voltage is higher than a first threshold, conduct the supply voltage to the BOOST boost unit; when the supply voltage of the battery power supply module 1 is lower than the first threshold, trigger the boost module 3 to conduct;

[0040] The BOOST boost unit is used to adjust the boost amplitude based on the PWM signal when supplying voltage input, and supply power to the electrical equipment after completing the boost;

[0041] The input end of the conduction control unit is connected to the output end of the battery power supply module 1, the first output end of the conduction control unit is connected to the second input end of the amplifier boost module 3, the second output end of the conduction control unit is connected to the input end of the BOOST boost unit, and the output end of the BOOST boost unit is connected to the first input end of the motor working module 4.

[0042] In this example: See Figure 2 and Figure 3 The conduction control unit includes a first diode D1, a second diode D2, and a first inverter U1. The cathode of the first diode D1 is connected to the output end of the battery power supply module 1, the anode of the first diode D1 is connected to the anode of the second diode D2 and the input end of the first inverter U1, the output end of the first inverter U1 is connected to the second input end of the amplifier boost module 3, and the cathode of the second diode D2 is connected to the input end of the BOOST boost unit.

[0043] The first diode D1 is used as a voltage-stabilizing diode and is turned on when the supply voltage of the battery-powered module 1 is higher than the first threshold value, and then the voltage is output to the BOOST boost unit through the first diode D1 and the second diode D2; when the supply voltage of the battery-powered module 1 is lower than the first threshold value, the first diode D1 is turned off, and at this time, the input end of the first inverter U1 is at a low level, and the first inverter U1 outputs a high level, triggering the amplifier boost module 3 to turn on.

[0044] In another embodiment: the voltage input condition is detected by the first inverter U1 , and the information can also be detected by devices such as a switch tube and fed back to the amplification and boosting module 3 .

[0045] In this example: See Figure 2 and Figure 3 The BOOST boost unit includes a first inductor L1, a second MOS tube V2, a third diode D3, and a first capacitor C1. One end of the first inductor L1 is connected to the second output end of the conduction control unit, the other end of the first inductor L1 is connected to the D pole of the second MOS tube V2 and the positive pole of the third diode D3, the S pole of the second MOS tube V2 is grounded, the G pole of the second MOS tube V2 is connected to the PWM signal, the negative pole of the third diode D3 is connected to one end of the first capacitor C1 and the first input end of the motor working module 4, and the other end of the first capacitor C1 is grounded.

[0046] After the voltage is input, the PWM signal controls the conduction frequency of the second MOS tube V2, so that the voltage at the capacitor C1 increases, completing the voltage boost.

[0047] In another embodiment: a resistor may be connected in parallel with the first capacitor C1 to form a shunt to avoid a large current being supplied to the charging device. The resistor is omitted here to reduce power loss.

[0048] In this example: See Figure 1 and Figure 2 , the boost module 3 includes:

[0049] The clamping energy storage unit is used to supply voltage to the boost clamping unit; when the supply voltage of the battery power module 1 is higher than the second threshold and lower than the first threshold, it receives the trigger signal of the boost power supply module 2, and then receives the supply voltage of the battery power module 1, stores electric energy after clamping; when the supply voltage of the battery power module 1 is lower than the second threshold, stops absorbing the supply voltage of the battery power module 1;

[0050] A boost clamping unit, used for first boosting the voltage and then clamping the voltage after the voltage is input, and supplying power to the boost power supply module 2 after the boost power supply module 2 stops receiving the supply voltage of the battery power supply module 1;

[0051] The first input end of the voltage clamping energy storage unit is connected to the output end of the battery power supply module 1, the second input end of the voltage clamping energy storage unit is connected to the first output end of the boost power supply module 2, the output end of the voltage clamping energy storage unit is connected to the input end of the boost voltage clamping unit, the first output end of the boost voltage clamping unit is connected to the second input end of the boost power supply module 2, and the second output end of the boost voltage clamping unit is connected to the second input end of the motor working module 4.

[0052] In this example: See Figure 2 and Figure 4 The voltage clamping energy storage unit includes a first MOS tube V1, a first resistor R1, a fourth diode D4, a fifth diode D5, and a super capacitor CC. The D pole of the first MOS tube V1 is connected to the output end of the battery power supply module 1, the G pole of the first MOS tube V1 is connected to the first output end of the boost power supply module 2, the S pole of the first MOS tube V1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the cathode of the fourth diode D4 and the anode of the fifth diode D5, the anode of the fourth diode D4 is grounded, the cathode of the fifth diode D5 is connected to one end of the super capacitor CC and the input end of the boost voltage clamping unit, and the other end of the super capacitor CC is grounded.

[0053] When the first inverter U1 outputs a low level, the first MOS tube V1 is turned off; when the first inverter U1 outputs a high level, the first MOS tube V1 is turned on; the voltage of the battery E1 passes through the first MOS tube V1 and the first resistor R1 and then is clamped by the fourth diode D4 to charge the super capacitor CC; the super capacitor CC stores electric energy; as the battery E1 discharges, when the voltage of the battery E1 is insufficient, the voltage of the super capacitor CC is the clamping voltage of the fourth diode D4, and when the voltage of the battery E1 is less than the voltage, the super capacitor CC stops being supplied with power.

[0054] In another embodiment, the fifth diode D5 may be omitted. The fifth diode D5 serves as a current limiting diode to prevent the super capacitor CC from supplying power to the battery E1 in the reverse direction.

[0055] In this example: See Figure 2 and Figure 4The boost clamping unit includes a second resistor R2, a third transistor V3, a transformer W, a seventh diode D7, a second capacitor C2, a sixth resistor R6, an eleventh diode D11, and a twelfth diode D12. One end of the input end of the transformer W is connected to one end of the second resistor R2 and the output end of the clamping energy storage unit. The other end of the input end of the transformer W is connected to the collector of the third transistor V3. The other end of the second resistor R2 is connected to the first end of the output end of the transformer W. The emitter of the third transistor V3 is grounded. The base of the third transistor V3 is connected to the transformer. The second end of the output end of the transformer W, the third end of the output end of the transformer W is connected to the anode of the seventh diode D7, the cathode of the seventh diode D7 is connected to one end of the second capacitor C2 and one end of the sixth resistor R6, the other end of the second capacitor C2 is grounded, the other end of the sixth resistor R6 is connected to the cathode of the eleventh diode D11, the anode of the twelfth diode D12, and the second input end of the motor working module 4, the anode of the eleventh diode D11 is grounded, and the cathode of the twelfth diode D12 (i.e., the common point A) is connected to the second input end of the boost power supply module 2.

[0056] The super capacitor CC supplies power, and the voltage passes through the second resistor R2, the first and second output ends of the transformer W, and controls the third transistor V3 to be turned on. Current flows through the input end of the transformer W, and the output end of the transformer W forms a current to complete the boost. After passing through the seventh diode D7 and the second capacitor C2, a stable direct current is formed. After being clamped by the eleventh diode D11, a stable voltage is supplied to the BOOST boost unit to ensure that it continues to supply power to the electrical equipment. This avoids the situation where the voltage supplied to the electrical equipment is low after the voltage of the battery E1 drops, resulting in low charging voltage and current.

[0057] In another embodiment, a transformer W is used to perform the voltage boost, and other DC boost devices may also be used to perform the voltage boost.

[0058] In this example: See Figure 2 and Figure 5The motor working module 4 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth diode D6, a second amplifier U2, an eighth diode D8, a ninth diode D9, a tenth diode D10, and a motor M. One end of the third resistor R3 is connected to one end of the fifth resistor R5 and the second output end of the boost power supply module 2, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the inverting end of the second amplifier U2, the other end of the fourth resistor R4 is grounded, the other end of the fifth resistor R5 is connected to the cathode of the sixth diode D6 and the non-inverting end of the second amplifier U2, the anode of the sixth diode D6 is grounded, the output end of the second amplifier U2 is connected to the anode of the eighth diode D8, the cathode of the eighth diode D8 is connected to the anode of the ninth diode D9, the cathode of the ninth diode D9 is connected to the cathode of the tenth diode D10 and one end of the motor M, the other end of the motor M is grounded, and the anode of the tenth diode D10 is connected to the second output end of the amplifier and boost module 3.

[0059] When the amplifier and boost module 3 is working, there are two-stage boosting, and the circuit temperature is relatively high. Therefore, the motor working module 4 is designed. At this time, the positive electrode of the tenth diode D10 is at a high level, thereby triggering the motor M to work and dissipate heat; when the boost power supply module 2 is working, its output voltage will be relatively high, that is, the voltage on the fourth resistor R4 will be higher than the voltage on the sixth diode D6, and the second amplifier U2 outputs a low level; when the boost power supply module 2 is short-circuited or other faults cause the current to increase, the voltage on the fourth resistor R4 is reduced, the second amplifier U2 outputs a high level, and the eighth diode D8 lights up to indicate an abnormality. At the same time, the motor M works to achieve cooling treatment, delaying the increase in current and causing the device to heat up rapidly, and eventually the circuit is damaged.

[0060] In another embodiment, a buzzer may be provided to increase the prompting effect.

[0061] The working principle of the present invention is: the battery power supply module 1 is used to supply voltage; the boost power supply module 2 is used to boost the voltage to supply power to the electrical equipment when the supply voltage of the battery power supply module 1 is higher than the first threshold; when the supply voltage of the battery power supply module 1 is lower than the first threshold, the amplification boost module 3 is triggered to turn on, and the voltage output by the amplification boost module 3 is received, and the power is supplied to the electrical equipment after boosting; the amplification boost module 3 is used to clamp the voltage and then boost the voltage to supply power to the boost power supply module 2 when the supply voltage of the battery power supply module 1 is higher than the second threshold and lower than the first threshold; when the supply voltage of the battery power supply module 1 is lower than the second threshold, the supply voltage of the battery power supply module 1 is stopped from being absorbed; the motor working module 4 is used to cool down the working when the amplification boost module 3 is working, and at the same time, cool down the working and indicate abnormality when the output voltage of the boost power supply module 2 is lower than the set value.

[0062] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A DC-DC converter, characterized in that: The DC-DC converter includes: A battery powered module for outputting a supply voltage; A boost power supply module, used to boost the voltage to supply power to the power-consuming device when the voltage supplied by the battery power supply module is higher than a first threshold; when the voltage supplied by the battery power supply module is lower than the first threshold, trigger the boost module to conduct, receive the voltage output by the boost module, and boost the voltage to supply power to the power-consuming device; The boost module is used to boost the voltage after clamping to supply power to the boost module when the voltage supplied by the battery power module is higher than the second threshold and lower than the first threshold; and stop absorbing the voltage supplied by the battery power module when the voltage supplied by the battery power module is lower than the second threshold; The motor working module is used to cool down the motor when the boost module is working, and to cool down the motor and indicate abnormality when the output voltage of the boost power supply module is lower than the set value; The output end of the battery power supply module is connected to the first input end of the boost power supply module and the first input end of the amplifier boost module, the first output end of the boost power supply module is connected to the second input end of the amplifier boost module, the second output end of the boost power supply module is connected to the first input end of the motor working module, the first output end of the amplifier boost module is connected to the second input end of the boost power supply module, and the second output end of the amplifier boost module is connected to the second input end of the motor working module.

2. The DC-DC converter according to claim 1, characterized in that: The boost power supply module includes: A conduction control unit is used to detect the supply voltage of the battery power supply module, and when the supply voltage is higher than a first threshold, conduct the supply voltage to the BOOST boost unit; when the supply voltage of the battery power supply module is lower than the first threshold, trigger the boost module to conduct; The BOOST boost unit is used to adjust the boost amplitude based on the PWM signal when supplying voltage input, and supply power to the electrical equipment after completing the boost; The input end of the conduction control unit is connected to the output end of the battery power supply module, the first output end of the conduction control unit is connected to the second input end of the amplifier boost module, the second output end of the conduction control unit is connected to the input end of the BOOST boost unit, and the output end of the BOOST boost unit is connected to the first input end of the motor working module.

3. The DC-DC converter according to claim 2, characterized in that: The conduction control unit includes a first diode, a second diode, and a first inverter. The cathode of the first diode is connected to the output end of the battery power supply module, the anode of the first diode is connected to the anode of the second diode and the input end of the first inverter, the output end of the first inverter is connected to the second input end of the amplifier boost module, and the cathode of the second diode is connected to the input end of the BOOST boost unit.

4. The DC-DC converter according to claim 2, characterized in that: The BOOST boost unit includes a first inductor, a second MOS tube, a third diode, and a first capacitor. One end of the first inductor is connected to the second output end of the conduction control unit, the other end of the first inductor is connected to the D pole of the second MOS tube and the positive pole of the third diode, the S pole of the second MOS tube is grounded, the G pole of the second MOS tube is connected to the PWM signal, the negative pole of the third diode is connected to one end of the first capacitor and the first input end of the motor working module, and the other end of the first capacitor is grounded.

5. The DC-DC converter according to claim 1, characterized in that: The boost module includes: The clamping energy storage unit is used to supply voltage to the boost clamping unit; when the supply voltage of the battery power module is higher than the second threshold and lower than the first threshold, the unit receives a trigger signal from the boost power module, and then receives the supply voltage of the battery power module, stores electric energy after clamping; when the supply voltage of the battery power module is lower than the second threshold, the unit stops absorbing the supply voltage of the battery power module; The boost clamping unit is used to first boost the voltage and then clamp the voltage after the voltage is input, and to supply power to the boost power supply module after the boost power supply module stops receiving the supply voltage from the battery power supply module; The first input end of the voltage clamping energy storage unit is connected to the output end of the battery power supply module, the second input end of the voltage clamping energy storage unit is connected to the first output end of the boost power supply module, the output end of the voltage clamping energy storage unit is connected to the input end of the boost voltage clamping unit, the first output end of the boost voltage clamping unit is connected to the second input end of the boost power supply module, and the second output end of the boost voltage clamping unit is connected to the second input end of the motor working module.

6. The DC-DC converter according to claim 5, characterized in that: The voltage clamping energy storage unit includes a first MOS tube, a first resistor, a fourth diode, a fifth diode, and a super capacitor. The D pole of the first MOS tube is connected to the output end of the battery power supply module, the G pole of the first MOS tube is connected to the first output end of the boost power supply module, the S pole of the first MOS tube is connected to one end of the first resistor, the other end of the first resistor is connected to the cathode of the fourth diode and the anode of the fifth diode, the anode of the fourth diode is grounded, the cathode of the fifth diode is connected to one end of the super capacitor and the input end of the boost voltage clamping unit, and the other end of the super capacitor is grounded.

7. The DC-DC converter according to claim 5, characterized in that: The boost clamping unit includes a second resistor, a third triode, a transformer, a seventh diode, a second capacitor, a sixth resistor, an eleventh diode, and a twelfth diode. One end of the input end of the transformer is connected to one end of the second resistor and the output end of the clamping energy storage unit, the other end of the input end of the transformer is connected to the collector of the third triode, the other end of the second resistor is connected to the first end of the output end of the transformer, the emitter of the third triode is grounded, the base of the third triode is connected to the second end of the output end of the transformer, the third end of the output end of the transformer is connected to the positive electrode of the seventh diode, the negative electrode of the seventh diode is connected to one end of the second capacitor and one end of the sixth resistor, the other end of the second capacitor is grounded, the other end of the sixth resistor is connected to the negative electrode of the eleventh diode, the positive electrode of the twelfth diode, and the second input end of the motor working module, the positive electrode of the eleventh diode is grounded, and the negative electrode of the twelfth diode is connected to the second input end of the boost power supply module.

8. The DC-DC converter according to any one of claims 1 to 7, characterized in that: The motor working module includes a third resistor, a fourth resistor, a fifth resistor, a sixth diode, a second amplifier, an eighth diode, a ninth diode, a tenth diode, and a motor. One end of the third resistor is connected to one end of the fifth resistor and the second output end of the boost power supply module, the other end of the third resistor is connected to one end of the fourth resistor and the inverting end of the second amplifier, the other end of the fourth resistor is grounded, the other end of the fifth resistor is connected to the cathode of the sixth diode and the non-inverting end of the second amplifier, the anode of the sixth diode is grounded, the output end of the second amplifier is connected to the anode of the eighth diode, the cathode of the eighth diode is connected to the anode of the ninth diode, the cathode of the ninth diode is connected to the cathode of the tenth diode and one end of the motor, the other end of the motor is grounded, and the anode of the tenth diode is connected to the second output end of the amplifier and boost module.

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