CN111478386A - Quick charging box cooling circuit and cooling method - Google Patents

Quick charging box cooling circuit and cooling method Download PDF

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Publication number
CN111478386A
CN111478386A CN202010245727.1A CN202010245727A CN111478386A CN 111478386 A CN111478386 A CN 111478386A CN 202010245727 A CN202010245727 A CN 202010245727A CN 111478386 A CN111478386 A CN 111478386A
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resistor
diode
temperature
pin
transistor
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CN202010245727.1A
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Chinese (zh)
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蒋勇
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Nanjing Arp New Energy Technology Co ltd
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Nanjing Arp New Energy Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)

Abstract

The invention discloses a cooling circuit and a cooling method for a quick charging box, belonging to the field of quick charging boxes; a quick charging box cooling circuit and a cooling method comprise the following steps: the device comprises a power input unit, a temperature detection unit, an automatic protection unit, a comparison unit and a cooling unit; the power supply input unit inputs power supply voltage of the charging box, and performs voltage conversion and voltage stabilization input; the temperature detection unit detects the temperature of the charging box when the charging box performs quick charging operation; the comparison unit is used for comparing the temperature of the charging box during the rapid charging operation with the preset maximum temperature of the charging box; the automatic protection unit automatically cuts off the power when the temperature of the charging box reaches the maximum value when the charging box works; the temperature detection unit is used for detecting the temperature of the charging box under the rapid charging operation, the comparison unit is used for comparing the temperatures, when the temperature is too high, the temperature is reduced by using a temperature reduction method, and if the temperature cannot be reduced, the power-off protection equipment can be automatically powered off.

Description

Quick charging box cooling circuit and cooling method
Technical Field
The invention relates to the field of quick charging boxes, in particular to a cooling circuit and a cooling method for a quick charging box.
Background
The charging box is a device for charging working equipment through an internal storage battery, and is a working load and a working power supply; in our daily life, the problem that our equipment is not enough in electric power and does not have the power supply is solved to the charging case, and along with the development of power technology, the technology of charging case is also improving day by day, and is all improving in electric power storage size and charging speed.
Quick charge is the new problem that the charging box provided in recent years, and traditional charging box is low because output voltage is low to lead to charging speed slow, brought very big loss to some need quick production and work urgent work occasion, so quick charge great promotion charging box's efficiency and the efficiency of working equipment.
The quick charging case of prior art has improved output voltage because quick charge's the reason to lead to the inside temperature rise of charging case very fast, thereby damage very big to the battery of charging case, and after many times work, the efficiency greatly reduced of charging case, the reserve electric quantity of battery can be more and more littleer, so how let quick charging case work temperature measurement and cooling be the problem that needs now to solve.
Disclosure of Invention
The purpose of the invention is as follows: a cooling circuit and a cooling method for a quick charging box are provided to solve the above problems.
The technical scheme is as follows: a quick charging box cooling circuit and a cooling method comprise the following steps: the device comprises a power input unit, a temperature detection unit, an automatic protection unit, a cooling unit and a comparison unit; the device is characterized in that the cooling unit comprises a cooling module;
the power supply input unit is used for supplying power to a charging load and each circuit in the quick charging box and performing voltage input voltage stabilization protection;
the temperature detection unit detects the temperature of an internal circuit of the quick charging box and feeds the temperature back to the quick charging box when the quick charging box works;
the comparison unit compares the temperature signal detected by the temperature detection unit with the maximum working temperature value of the quick charging box and outputs a comparison signal;
when the detected temperature is higher than the maximum working temperature value of the quick charging box, the automatic protection unit automatically cuts off the power supply, so that the load and the charging box are protected;
the cooling unit utilizes the cooling module to cool the circuit of the quick charging box.
In one embodiment, the temperature reduction module includes a light emitting diode D9, a transistor Q9, a resistor R11, a polar capacitor C6, a diode D10, a transistor Q8, a temperature display 8 DR 8, an integrated circuit U8, a sliding resistor RV 8, a capacitor C8, a diode D8, and a relay R8 2, wherein a collector of the transistor Q8 is connected to a cathode of the light emitting diode D8, an emitter of the transistor Q8 is connected to anodes of the resistor R8 and the polar capacitor C8, a base of the transistor Q8 is connected to a cathode of the diode D8, an emitter of the transistor Q8 is connected to a cathode of the polar capacitor C8, a collector of the transistor Q8 is connected to an anode of the light emitting diode D8, an anode of the diode D8 and one end of the temperature display 8, a cathode of the diode D8, an anode of the diode D8 and one end of the temperature display 8 DR 8, a base of the transistor Q8 is connected to a cathode of the integrated circuit D8, a base of the integrated circuit R8 and a cathode of the integrated circuit R8, a cathode of the integrated circuit R8 and a negative terminal of the integrated circuit R8 of the integrated circuit 8 and a terminal of the other terminal of the integrated circuit 8, the adjustable resistor R8 and the other terminal of the integrated circuit 8, the adjustable resistor R8 and the other terminal of the adjustable resistor R8.
In one embodiment, the power input unit includes: fuse FU1, transformer TR1, diode D1, diode D2, capacitor C1, voltage stabilizer U1, resistor R1, sliding resistor RV1, resistor R3, triode Q1, triode Q2, triode Q3, resistor R2 and capacitor C2; wherein, one end of the fuse FU1 is connected to the positive electrode of the power supply, the other end of the fuse FU1 is connected to the positive input end of the transformer TR1, the negative input end of the transformer TR1 is connected to the negative electrode of the power supply, the positive input end of the transformer TR1 is connected to the positive electrode of the diode D1, the negative input end of the transformer TR1 is connected to the positive electrode of the diode D2, pin 1 of the regulator U1 is simultaneously connected to the negative electrode of the diode D1, the negative electrode of the diode D2 and one end of the capacitor C1, pin 3 of the regulator U1 is simultaneously connected to the collector of the triode Q2 and one end of the resistor R1, the base of the triode Q2 is simultaneously connected to one end of the resistor R2, one end of the resistor R1, the collector of the triode Q3 and one end of the sliding resistor RV1, the base of the triode Q1 is simultaneously connected to the other end of the sliding resistor R1 and one end of the resistor R3, the base of the triode Q3 is connected with the collector of the triode Q1 and the other end of the resistor R2, the emitter of the triode Q2 is connected with one end of the capacitor C2, and the pin No. 2 of the voltage stabilizer U1 is connected with the other end of the capacitor C1, the other end of the capacitor C2, the other end of the resistor R3, the emitter of the triode Q1, the collector of the triode Q3 and the middle end of the transformer TR1 and is grounded.
In one embodiment, the temperature detection unit includes: the temperature sensor U2, a resistor R4, a diode D3, a capacitor C4, a sliding resistor RV2, a resistor R5, a resistor R6, a diode D4, a triode Q4 and an amplifier U5; a pin 1 of the temperature sensor U2 is connected to one end of the resistor R4, a pin 3 of the temperature sensor U2 is connected to the other end of the resistor R4, one end of the resistor R6 and a pin 2 of the amplifier U5, a pin 3 of the amplifier U5 is connected to an adjustable end of the sliding resistor RV2, a pin 7 of the amplifier U5 is connected to one end of the capacitor C3, a pin 2 of the temperature sensor U2 and a collector of the transistor Q4, the other end of the sliding resistor RV2 is connected to one end of the resistor R5, a pin 6 of the amplifier U5 is connected to a negative electrode of the diode D4 and a base of the transistor Q4, and a pin 4, a pin 1 and a pin 5 of the amplifier U5 are connected to the other end of the resistor R6, the other end of the resistor R5, and a pin 3 are connected to the other end of the resistor R5 at the same time, The anode of the diode D4 is connected to the emitter of the transistor Q4.
In one embodiment, the comparison unit includes: the circuit comprises a resistor R7, a capacitor C4, a resistor R8, a resistor R9, a triode Q5 and a comparator U3; pin 1 of the comparator U3 is connected to one end of the resistor R8, pin 4 of the comparator U3 is connected to the other end of the resistor R8 and one end of the capacitor C4, pin 2 of the comparator U3 is connected to one end of the resistor R7 and grounded, pin 6 and pin 7 of the comparator U3 are connected to one end of the resistor R9 and the base of the transistor Q5, pin 5 and pin 3 of the comparator U3 are output, the collector of the transistor Q5 is connected to the other end of the resistor R7 and the other end of the capacitor C4, and the emitter of the transistor Q5 is connected to the output terminal.
In one embodiment, the automatic protection unit comprises a resistor R10, a zener diode D6, a transistor Q6, a zener diode D5, a sliding resistor RV3, a capacitor C5, a transistor Q7, a zener diode D7, a diode D8, an electronic switch U4, and a relay R L1, wherein a drain of the transistor Q6 is connected to a negative electrode of the zener diode D6, a source of the transistor Q6 is simultaneously connected to one end of the electronic R10, a negative electrode of the zener diode D5, one end of the sliding resistor RV3, and an adjustable end, an anode of the zener diode D5 is grounded, a gate of the transistor Q6 is simultaneously connected to one end of the capacitor C5, a collector of the transistor Q7, the other end of the sliding resistor RV3, and a pin No. 5 of the electronic switch U4, a base of the transistor Q7 is simultaneously connected to a pin No. 1 of the electronic switch U4 and a negative electrode of the zener diode D7, a negative electrode of the sliding resistor RV3 is simultaneously connected to a negative electrode of the electronic switch U8672, a positive electrode of the electronic switch U7, and a negative electrode of the transistor Q7 is connected to the positive electrode of the output diode D7, the positive electrode of the transistor Q7 and the positive electrode of the output terminal 7 of the electronic switch U7 is connected to the output diode D7.
In one embodiment, the type of the transformer TR1 is TRAN-2P3S, the type of the voltage stabilizer U1 is 7805, the type of the comparator U3 is L C L7665, and the type of the electronic switch U4 is TWH 8778.
In one embodiment, a method for cooling a cooling circuit of a quick charging box is characterized in that a cooling module cools the circuit by performing a temperature stabilizing circuit and an inverter circuit, and the method comprises the following specific working steps:
step 1, forming a temperature stabilizing circuit by using a light emitting diode D9, a triode Q9, a resistor R11, a polar capacitor C6, a diode D10, a triode Q8 and a temperature display L DR 1;
and step 2, forming a turnover circuit by the integrated circuit U6, the sliding resistor RV4, the sliding resistor RV5, the capacitor C7, the diode D11 and the relay R L2.
In one embodiment, the further working process according to step 1 and step 2 is:
step 1-1, when a temperature signal is transmitted to a temperature stabilizing circuit, a light emitting diode D9 is normally on, a triode Q9 is used as an amplifier for signal amplification, a temperature display L DR1 is used for temperature display, a resistor R11 is used for impedance of a control circuit, a polar capacitor is changed according to the change of a resistor R11, and therefore the triode Q8 is used as a contact switch for signal transmission;
and 2-1, adjusting circuit impedance by the sliding resistor RV4 according to the value of the temperature display L DR1, wherein the impedance is increased when the temperature is increased, so that voltage output is reduced, the sliding resistor RV5 controls working voltage input into the integrated circuit U6, the capacitor C7 performs current filtering, and when the temperature is reduced to a working range, the relay R L2 is attracted, and the diode D11 performs signal conduction transmission.
Has the advantages that: according to the invention, the voltage input into the charging load is stabilized and the voltage signal value is amplified through the power input unit, so that the output voltage conforms to the charging voltage range of the load; when charging is carried out, temperature detection of the quick charging box is carried out through the temperature detection unit, signals are transmitted to the comparison unit, comparison with a preset temperature value of the quick charging box is carried out, when the temperature is too high, automatic power-off is carried out through the automatic protection unit, meanwhile, the cooling module carries out circuit cooling, and when the temperature of the charging box is lower than the preset temperature value, charging is automatically started; the invention solves the problem of temperature detection of the quick charging box, and simultaneously, when the temperature of the quick charging box is overhigh, the charging box is automatically powered off and cooled; thereby reducing damage to the quick charging box and improving the service life and the storage capacity of the storage battery.
Drawings
FIG. 1 is a flow chart of the operation of the present invention.
Fig. 2 is a circuit diagram of the operation of the present invention.
Fig. 3 is a circuit diagram of a power input unit of the present invention.
Fig. 4 is a circuit diagram of the temperature detection unit of the present invention.
Fig. 5 is a circuit diagram of a comparison unit of the present invention.
Fig. 6 is a circuit diagram of an automatic protection unit of the present invention.
FIG. 7 is a circuit diagram of the cooling module of the present invention.
Detailed Description
In this embodiment, as shown in fig. 1, a rapid charging box cooling circuit includes: the device comprises a power input unit, a temperature detection unit, an automatic protection unit, a cooling unit and a comparison unit; the device is characterized in that the cooling unit comprises a cooling module;
the power supply input unit is used for supplying power to a charging load and each circuit in the quick charging box and performing voltage input voltage stabilization protection;
the temperature detection unit detects the temperature of an internal circuit of the quick charging box and feeds the temperature back to the quick charging box when the quick charging box works;
the comparison unit compares the temperature signal detected by the temperature detection unit with the maximum working temperature value of the quick charging box and outputs a comparison signal;
when the detected temperature is higher than the maximum working temperature value of the quick charging box, the automatic protection unit automatically cuts off the power supply, so that the load and the charging box are protected;
the cooling unit utilizes the cooling module to cool the circuit of the quick charging box.
As shown in fig. 3, the power input unit includes: fuse FU1, transformer TR1, diode D1, diode D2, capacitor C1, voltage stabilizer U1, resistor R1, sliding resistor RV1, resistor R3, transistor Q1, transistor Q2, transistor Q3, resistor R2 and capacitor C2.
In a further embodiment, one end of the fuse FU1 is connected to a positive electrode of a power supply, the other end of the fuse FU1 is connected to a positive input terminal of the transformer TR1, a negative input terminal of the transformer TR1 is connected to a negative electrode of the power supply, a positive input terminal of the transformer TR1 is connected to a positive electrode of the diode D1, a negative input terminal of the transformer TR1 is connected to a positive electrode of the diode D2, pin 1 of the regulator U1 is simultaneously connected to a negative electrode of the diode D1, a negative electrode of the diode D2 and one end of the capacitor C1, pin 3 of the regulator U1 is simultaneously connected to a collector of the transistor Q2 and one end of the resistor R1, a base of the transistor Q2 is simultaneously connected to one end of the resistor R2, one end of the resistor R1, a collector of the transistor Q3 and one end of the sliding resistor 1 and an adjustable end, the base of the triode Q1 is connected with the other end of the sliding resistor RV1 and one end of the resistor R3, the base of the triode Q3 is connected with the collector of the triode Q1 and the other end of the resistor R2, the emitter of the triode Q2 is connected with one end of the capacitor C2, and the pin No. 2 of the voltage stabilizer U1 is connected with the other end of the capacitor C1, the other end of the capacitor C2, the other end of the resistor R3, the emitter of the triode Q1, the collector of the triode Q3 and the middle end of the transformer TR1 and grounded.
In a further embodiment, the transformer TR1 performs regulation voltage transformation according to different charging loads, and the diode D1 and the diode D2 are input to the regulator U1, the regulator U1 supplies voltage to the base of the transistor Q2 through the resistor R1 after rectification and filtering, so that the regulator U1 is turned on, the voltage passes through the sliding resistor RV1 and the resistor R3, so that the transistor Q1 is turned on, and at this time, the voltages of the transistor Q1, the transistor Q2 and the transistor Q3 are unchanged, and the output voltage is determined by regulating the sliding resistor RV 1.
As shown in fig. 4, the temperature detection unit includes: temperature sensor U2, resistance R4, diode D3, electric capacity C4, slide resistor RV2, resistance R5, resistance R6, diode D4, triode Q4, amplifier U5.
In a further embodiment, pin 1 of the temperature sensor U2 is connected to one end of the resistor R4, pin 3 of the temperature sensor U2 is connected to the other end of the resistor R4, one end of the resistor R6 and pin 2 of the amplifier U5, pin 3 of the amplifier U5 is connected to the adjustable end of the sliding resistor RV2, pin 7 of the amplifier U5 is connected to one end of the capacitor C3, pin 2 of the temperature sensor U2 and the collector of the transistor Q4, the other end of the sliding resistor RV2 is connected to one end of the resistor R5, pin 6 of the amplifier U5 is connected to the negative electrode of the diode D4 and the base of the transistor Q4, pin 4, pin 1 and pin 5 of the amplifier U5 are connected to the other end of the resistor R6, the other end of the resistor R5, and the other end of the resistor R5 The anode of the diode D4 is connected to the emitter of the transistor Q4.
In a further embodiment, temperature sensing and signal transmission is provided by temperature sensor U2, signal amplification is provided by amplifier U5, and output is provided by transistor Q4 contact switch.
As shown in fig. 5, the comparing unit includes: the circuit comprises a resistor R7, a capacitor C4, a resistor R8, a resistor R9, a triode Q5 and a comparator U3.
In a further embodiment, pin No. 1 of the comparator U3 is connected to one end of the resistor R8, pin No. 4 of the comparator U3 is connected to the other end of the resistor R8 and one end of the capacitor C4 at the same time, pin No. 2 of the comparator U3 is connected to one end of the resistor R7 and grounded, pins No. 6 and 7 of the comparator U3 are connected to one end of the resistor R9 and the base of the transistor Q5, pin No. 5 and pin No. 3 of the comparator U3 are output, the collector of the transistor Q5 is connected to the other end of the resistor R7 and the other end of the capacitor C4 at the same time, and the emitter of the transistor Q5 is connected to the output terminal.
In a further embodiment, by receiving the signal of the temperature detecting unit, the comparator U3 compares the operating temperature of the fast charging box with the maximum temperature value of the fast charging box, so that when the temperature is normal, the output is conducted through the transistor Q5, otherwise, the output is conducted through the output end of the comparator.
As shown in fig. 6, the automatic protection unit comprises a resistor R10, a zener diode D6, a transistor Q6, a zener diode D5, a sliding resistor RV3, a capacitor C5, a triode Q7, a zener diode D7, a diode D8, an electronic switch U4 and a relay R L1.
In a further embodiment, the drain of the transistor Q6 is connected to the cathode of the zener diode D6, the source of the transistor Q6 is connected to one end of the electronic R10, the cathode of the zener diode D5, one end of the sliding resistor RV3 and the adjustable end at the same time, the anode of the zener diode D5 is grounded, the gate of the transistor Q6 is connected to one end of the capacitor C5, the collector of the transistor Q7, the other end of the sliding resistor RV3 and the pin No. 5 of the electronic switch U4 at the same time, the base of the transistor Q7 is connected to the pin No. 1 of the electronic switch U4 and the cathode of the zener diode D2, the pin No. 4 of the electronic switch U4 is connected to one end of the relay R L, the pin No. 2 of the electronic switch U4 is connected to the pin No. 8, the pin No. 3 of the electronic switch U4 is connected to the anode of the zener diode D6, the cathode of the capacitor C L, the anode of the electronic switch U4 and the cathode of the transistor Q5 and the output diode D5 are connected to the output terminal 5 and the output of the triode 5.
In a further embodiment, when the circuit temperature is normal, the relay R L1 is attracted to supply power to the load, when the temperature is too high, the sliding resistor RV3 increases the impedance, so that a signal is conducted through the triode Q7 and input into the electronic switch U4, the electronic switch U4 enables the relay R L1 to be disconnected through the diode D8, the equipment is powered off, and the voltage stabilizing diode D6, the voltage stabilizing diode D7 and the voltage stabilizing diode D5 are used for protecting circuits and components.
As shown in fig. 7, the cooling module includes a light emitting diode D9, a transistor Q9, a resistor R11, a polar capacitor C6, a diode D10, a transistor Q8, a temperature display L DR1, an integrated circuit U6, a sliding resistor RV4, a sliding resistor RV5, a capacitor C7, a diode D11, and a relay R L2.
In a further embodiment, a collector of the transistor Q9 is connected to a cathode of the light emitting diode D9, an emitter of the transistor Q9 is connected to both the resistor R9 and an anode of the polarity capacitor C9, a base of the transistor Q9 is connected to a cathode of the diode D9, an emitter of the transistor Q9 is connected to a cathode of the polarity capacitor C9, a collector of the transistor Q9 is connected to both an anode of the light emitting diode D9, an anode of the diode D9 and one end of the temperature display 9 DR 9, a base of the transistor Q9 is connected to both the other end of the temperature display 9 DR 9 and the other end of the resistor R9, a pin No. 4 and a pin No. 5 of the integrated circuit U9 are connected to both an end of the sliding resistor RV 9, an adjustable end of the sliding resistor RV 9 and one end of the sliding resistor R9, a pin No. 2 of the integrated circuit U9 is connected to both an end of the capacitor C9 and the other end of the sliding resistor R9, a negative terminal of the integrated circuit D9 and the integrated circuit D9, and the other end of the integrated circuit 9 is connected to both the adjustable resistor R9, and the integrated circuit R9.
In a further embodiment, a method for cooling a quick charging box cooling circuit is characterized in that a cooling module cools the circuit by performing a temperature stabilizing circuit and an inverter circuit, and the specific working steps are as follows:
step 1, forming a temperature stabilizing circuit by using a light emitting diode D9, a triode Q9, a resistor R11, a polar capacitor C6, a diode D10, a triode Q8 and a temperature display L DR 1;
step 2, forming a turnover circuit by the integrated circuit U6, the sliding resistor RV4, the sliding resistor RV5, the capacitor C7, the diode D11 and the relay R L2;
in a further embodiment, the further working process according to step 1 and step 2 is:
step 1-1, when a temperature signal is transmitted to a temperature stabilizing circuit, a light emitting diode D9 is normally on, a triode Q9 is used as an amplifier for signal amplification, a temperature display L DR1 is used for temperature display, a resistor R11 is used for impedance of a control circuit, a polar capacitor is changed according to the change of a resistor R11, and therefore the triode Q8 is used as a contact switch for signal transmission;
and 2-1, adjusting circuit impedance by the sliding resistor RV4 according to the value of the temperature display L DR1, wherein the impedance is increased when the temperature is increased, so that voltage output is reduced, the sliding resistor RV5 controls working voltage input into the integrated circuit U6, the capacitor C7 performs current filtering, and when the temperature is reduced to a working range, the relay R L2 is attracted, and the diode D11 performs signal conduction transmission.
The working principle is that when a quick charging box works, a storage battery supplies power, voltage enters a Transformer (TR) through a Fuse (FU), the Fuse (FU) performs circuit temperature rise when working voltage is too high, the circuit is disconnected internally, so that a circuit is protected, the Transformer (TR) converts input voltage into circuit working voltage, the Transformer (TR) conducts and inputs the circuit working voltage through a diode (D) and a diode (D), a capacitor (C) performs circuit filtering, the voltage is stabilized and works through a voltage stabilizer (U), output voltage is adjusted through a resistor (R) and is input into a triode (Q), so that the triode (Q) is conducted, voltage is conducted through a sliding Resistor (RV) and a resistor (R), at the moment, the voltage of the triode (Q), the triode (Q) and the triode (Q) is unchanged, output voltage is determined through adjusting the sliding Resistor (RV), the capacitor (C) outputs and filters, when power is supplied, the temperature detection unit performs circuit temperature real-time detection, a temperature sensor (U) works, the temperature sensor (U) performs transmission through collecting a charging box temperature signal, the temperature sensor (R) performs protection of the temperature sensor (U) performs protection, the protection of the resistor (U) performs the temperature sensor (U) through the resistor (R) performs protection, the resistor (R) performs signal amplification of the resistor (U) performs the protection, the resistor (U) performs signal amplification, the protection, the resistor (U) performs signal amplification, the signal amplification of the triode (U) performs signal amplification unit (U) performs signal when the transistor (U) performs signal, the signal amplification, the transistor (U) performs signal amplification, the signal is connected with the transistor (U) when the normal voltage is connected with the normal operation, the transistor (D) and the normal voltage adjustment, the transistor (D) and the transistor (D, the normal operation of the transistor (R) when the transistor (R) and the normal operation, the transistor (R) performs the transistor (R) and the normal operation, the normal operation of the transistor (D, the transistor (R) when the transistor (R) performs the transistor (R) and the transistor (R) when the transistor (D) performs the transistor (D, the transistor (R) and the transistor (R) performs the transistor (R) when the transistor (R) performs the transistor (R) and the transistor (R) performs the transistor (D, the transistor (R) performs the transistor (D) performs the normal operation, the transistor (R) performs the transistor (R) and the transistor.
In a word, the voltage input into the charging load is stabilized and the voltage signal value is amplified through the power input unit, so that the output voltage conforms to the charging voltage range of the load; when charging is carried out, temperature detection of the quick charging box is carried out through the temperature detection unit, signals are transmitted to the comparison unit, comparison with a preset temperature value of the quick charging box is carried out, when the temperature is too high, automatic power-off is carried out through the automatic protection unit, meanwhile, the cooling module carries out circuit cooling, and when the temperature of the charging box is lower than the preset temperature value, charging is automatically started; the invention solves the problem of temperature detection of the quick charging box, and simultaneously, when the temperature of the quick charging box is overhigh, the charging box is automatically powered off and cooled; thereby reducing damage to the quick charging box and improving the service life and the storage capacity of the storage battery.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

Claims (10)

1. A rapid charging case cooling circuit, comprising: the device comprises a power input unit, a temperature detection unit, an automatic protection unit, a cooling unit and a comparison unit;
the power supply input unit is used for supplying power to a charging load and each circuit in the quick charging box and performing voltage input voltage stabilization protection;
the temperature detection unit detects the temperature of an internal circuit of the quick charging box and feeds the temperature back to the quick charging box when the quick charging box works;
the comparison unit compares the temperature signal detected by the temperature detection unit with the maximum working temperature value of the quick charging box and outputs a comparison signal;
when the detected temperature is higher than the maximum working temperature value of the quick charging box, the automatic protection unit automatically cuts off the power supply, so that the load and the charging box are protected;
the cooling unit utilizes the cooling module to cool the circuit of the quick charging box.
2. A fast charging box cooling circuit as claimed in claim 1, wherein said cooling unit comprises a cooling module, wherein said cooling module comprises a light emitting diode D9, a transistor Q9, a resistor R11, a polarity capacitor C6, a diode D10, a transistor Q8, a temperature display 8 DR 8, an integrated circuit U8, a sliding resistor RV 8, a capacitor C8, a diode D8, and a relay R8, wherein a collector of said transistor Q8 is connected to a cathode of said light emitting diode D8, an emitter of said transistor Q8 is connected to an anode of said resistor R8 and said polarity capacitor C8, a base of said transistor Q8 is connected to a cathode of said diode D8, an emitter of said transistor Q8 is connected to a cathode of said polarity capacitor C8, a collector of said transistor Q8 is connected to a cathode of said integrated circuit DR 8, a collector of said transistor Q8 is connected to an anode of said light emitting diode D8, a cathode of said diode D8, an anode of said diode D8, a cathode of said diode D8 and a cathode of said temperature display circuit DR 8, a base of said integrated circuit DR 8 and a base of said sliding resistor D8 are connected to one end of said other end of said sliding resistor D8, and another end of said sliding resistor R8, and another end of said adjustable resistor D8, and another end of said sliding resistor D8, and another end of said sliding resistor D8, and said adjustable resistor D8, and another end of said sliding resistor D8 of said adjustable resistor D8 are connected to said adjustable resistor D8, and another end of said adjustable resistor D8, and another end of said adjustable resistor D8.
3. The rapid charging box cooling circuit according to claim 1, wherein the power input unit comprises: fuse FU1, transformer TR1, diode D1, diode D2, capacitor C1, voltage stabilizer U1, resistor R1, sliding resistor RV1, resistor R3, triode Q1, triode Q2, triode Q3, resistor R2 and capacitor C2; wherein, one end of the fuse FU1 is connected to the positive electrode of the power supply, the other end of the fuse FU1 is connected to the positive input end of the transformer TR1, the negative input end of the transformer TR1 is connected to the negative electrode of the power supply, the positive input end of the transformer TR1 is connected to the positive electrode of the diode D1, the negative input end of the transformer TR1 is connected to the positive electrode of the diode D2, pin 1 of the regulator U1 is simultaneously connected to the negative electrode of the diode D1, the negative electrode of the diode D2 and one end of the capacitor C1, pin 3 of the regulator U1 is simultaneously connected to the collector of the triode Q2 and one end of the resistor R1, the base of the triode Q2 is simultaneously connected to one end of the resistor R2, one end of the resistor R1, the collector of the triode Q3 and one end of the sliding resistor RV1, the base of the triode Q1 is simultaneously connected to the other end of the sliding resistor R1 and one end of the resistor R3, the base of the triode Q3 is connected with the collector of the triode Q1 and the other end of the resistor R2, the emitter of the triode Q2 is connected with one end of the capacitor C2, and the pin No. 2 of the voltage stabilizer U1 is connected with the other end of the capacitor C1, the other end of the capacitor C2, the other end of the resistor R3, the emitter of the triode Q1, the collector of the triode Q3 and the middle end of the transformer TR1 and is grounded.
4. The rapid charging box cooling circuit according to claim 1, wherein the temperature detection unit comprises: the temperature sensor U2, a resistor R4, a diode D3, a capacitor C4, a sliding resistor RV2, a resistor R5, a resistor R6, a diode D4, a triode Q4 and an amplifier U5; a pin 1 of the temperature sensor U2 is connected to one end of the resistor R4, a pin 3 of the temperature sensor U2 is connected to the other end of the resistor R4, one end of the resistor R6 and a pin 2 of the amplifier U5, a pin 3 of the amplifier U5 is connected to an adjustable end of the sliding resistor RV2, a pin 7 of the amplifier U5 is connected to one end of the capacitor C3, a pin 2 of the temperature sensor U2 and a collector of the transistor Q4, the other end of the sliding resistor RV2 is connected to one end of the resistor R5, a pin 6 of the amplifier U5 is connected to a negative electrode of the diode D4 and a base of the transistor Q4, and a pin 4, a pin 1 and a pin 5 of the amplifier U5 are connected to the other end of the resistor R6, the other end of the resistor R5, and a pin 3 are connected to the other end of the resistor R5 at the same time, The anode of the diode D4 is connected to the emitter of the transistor Q4.
5. The rapid charging box cooling circuit according to claim 1, wherein the comparing unit comprises: the circuit comprises a resistor R7, a capacitor C4, a resistor R8, a resistor R9, a triode Q5 and a comparator U3; pin 1 of the comparator U3 is connected to one end of the resistor R8, pin 4 of the comparator U3 is connected to the other end of the resistor R8 and one end of the capacitor C4, pin 2 of the comparator U3 is connected to one end of the resistor R7 and grounded, pin 6 and pin 7 of the comparator U3 are connected to one end of the resistor R9 and the base of the transistor Q5, pin 5 and pin 3 of the comparator U3 are output, the collector of the transistor Q5 is connected to the other end of the resistor R7 and the other end of the capacitor C4, and the emitter of the transistor Q5 is connected to the output terminal.
6. The rapid charging box cooling circuit according to claim 1, wherein the automatic protection unit comprises a resistor R, a zener diode D, a transistor Q, a zener diode D, a sliding resistor RV, a capacitor C, a triode Q, a zener diode D, a diode D, an electronic switch U and a relay R1, wherein a drain of the transistor Q is connected with a negative electrode of the zener diode D, a source of the transistor Q is simultaneously connected with one end of the electronic R, a negative electrode of the zener diode D, one end and an adjustable end of the sliding resistor RV, an anode of the zener diode D is grounded, a gate of the transistor Q is simultaneously connected with one end of the capacitor C, a collector of the triode Q, the other end of the sliding resistor RV and a No. 5 pin of the electronic switch U, a base of the triode Q is simultaneously connected with a No. 1 pin of the electronic switch U and a negative electrode of the zener diode D, a No. 4 pin of the electronic switch U is connected with one end of the relay R1, a No. 2 pin of the electronic switch U is simultaneously connected with a negative electrode of the diode D, a positive electrode of the electronic switch U is simultaneously connected with a positive electrode of the zener diode D, a positive electrode of the diode D, and a positive electrode of the relay R1 of the other end of the zener diode D is connected with the output of the triode D, and the output of the diode D.
7. The rapid charging box cooling circuit according to claim 3, wherein the transformer TR1 is of the type TRAN-2P 3S; the model of the voltage stabilizer U1 is 7805.
8. The rapid charging box cooling circuit of claim 5, wherein the comparator U3 is model L C L7665.
9. The rapid charging box cooling circuit of claim 6, wherein the electronic switch U4 is type TWH 8778.
10. The method for cooling the quick charging box cooling circuit according to claim 2, wherein the cooling module cools the circuit by performing a temperature stabilizing circuit and an inverter circuit, and the method comprises the following specific working steps:
step 1, forming a temperature stabilizing circuit by using a light emitting diode D9, a triode Q9, a resistor R11, a polar capacitor C6, a diode D10, a triode Q8 and a temperature display L DR 1;
step 2, forming a turnover circuit by the integrated circuit U6, the sliding resistor RV4, the sliding resistor RV5, the capacitor C7, the diode D11 and the relay R L2;
the further working process according to the step 1 and the step 2 is as follows:
step 1-1, when a temperature signal is transmitted to a temperature stabilizing circuit, a light emitting diode D9 is normally on, a triode Q9 is used as an amplifier for signal amplification, a temperature display L DR1 is used for temperature display, a resistor R11 is used for impedance of a control circuit, a polar capacitor is changed according to the change of a resistor R11, and therefore the triode Q8 is used as a contact switch for signal transmission;
and 2-1, adjusting circuit impedance by the sliding resistor RV4 according to the value of the temperature display L DR1, wherein the impedance is increased when the temperature is increased, so that voltage output is reduced, the sliding resistor RV5 controls working voltage input into the integrated circuit U6, the capacitor C7 performs current filtering, and when the temperature is reduced to a working range, the relay R L2 is attracted, and the diode D11 performs signal conduction transmission.
CN202010245727.1A 2020-03-31 2020-03-31 Quick charging box cooling circuit and cooling method Withdrawn CN111478386A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112098113A (en) * 2020-08-28 2020-12-18 奇瑞新能源汽车股份有限公司 Method for testing protection capability of each system of electric automobile in high-temperature environment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112098113A (en) * 2020-08-28 2020-12-18 奇瑞新能源汽车股份有限公司 Method for testing protection capability of each system of electric automobile in high-temperature environment

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Application publication date: 20200731