Direct current charging gun charging over-temperature detection system and method

Abstract

The invention discloses a charging over-temperature detection system and method for a direct-current charging gun, and relates to the technical field of direct-current fast charging, and the system comprises a temperature collection module, a signal conditioning circuit module, a micro-control module, a power regulation module and a control execution module. According to the invention, the stable charging power is maintained, and the temperature of the charging gun is kept in a reasonable range, so that the problems of resistance increase, limited charging power and the like caused by over-temperature are avoided, the relatively stable charging power is maintained, the prolonging of charging time is reduced, the energy utilization rate is improved, and the charging efficiency is improved by reasonably controlling the temperature of the charging gun. Energy loss caused by overheating is reduced, the utilization rate of energy is improved, and the charging process is more efficient and energy-saving; potential safety hazards such as insulation performance reduction, part damage short circuit and thermal runaway caused by overheating can be effectively prevented, accidents such as fire disasters and electric shock are avoided, the safety of users and equipment is guaranteed, and the service life of a battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of direct current fast charging technology, and in particular to a direct current charging gun charging overtemperature detection system and method. Background Art

[0002] As the electric vehicle market continues to expand, DC fast charging technology has become one of the key means to solve users' "range anxiety". DC charging guns can quickly charge electric vehicles. Compared with AC charging, it can directly provide high-power DC power to the power battery of electric vehicles, greatly shortening the charging time.

[0003] During the DC charging process, the charging gun and its connecting parts will generate heat due to the transmission of high current. For example, when the charging power reaches 100kW or even higher, the conductive parts in the charging gun will generate heat due to the existence of resistance. If the heat cannot be dissipated in time, the high temperature may cause the insulation performance of the charging gun to deteriorate, the connecting parts to age, and even cause safety accidents such as fire and short circuit. At the same time, excessive temperature will also affect the charging efficiency. According to the principle of thermal science, the increase in temperature will increase the resistance of the conductive material, further increase the heat generation power, form a vicious circle, reduce charging efficiency and waste energy.

[0004] At present, the cooling system of most DC charging guns is natural cooling technology, which mainly uses the principle of natural convection to transfer heat to the air through the heat sink. The heat dissipation efficiency is relatively low. For high temperature, high humidity environment or high power charging, it may not meet the heat dissipation requirements. At the same time, the effect of natural heat dissipation depends largely on the temperature, humidity and air flow of the surrounding environment. In hot summer or poorly ventilated environment, the effect of natural heat dissipation will be greatly reduced, which can easily cause the charging gun to overheat.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0006] In view of the problems in the related art, the present invention proposes a DC charging gun charging overtemperature detection system and method to overcome the above-mentioned technical problems existing in the existing related technology.

[0007] The technical solution of the present invention is achieved in this way:

[0008] In one aspect, the present invention:

[0009] A DC charging gun charging over-temperature detection system and method, comprising: a temperature acquisition module, a signal conditioning circuit module, a microcontroller module, a power regulation module and a control execution module, wherein;

[0010] The temperature collection module is used to deploy heating risk points of the charging gun and collect temperature information inside the charging gun;

[0011] The signal conditioning circuit module is used to perform signal conditioning on the collected temperature information and transmit it to the microcontroller module;

[0012] The microcontrol module is used to receive the temperature information after signal conditioning to obtain the temperature value, and compare the temperature value with the preset temperature warning threshold and temperature danger threshold respectively, wherein; if the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it means that the temperature of the current fever risk point is abnormally increased, and a power adjustment instruction is sent to the power adjustment module; if the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it means that the temperature of the current fever risk point is overheated, and a power-off control instruction is sent to the control execution module;

[0013] The power adjustment module is used to receive the power adjustment instruction and reduce the charging power of the charging gun, which includes: if the current temperature value is greater than the temperature warning threshold, and the temperature value increases by a preset intermediate value, the charging power is reduced by 10%;

[0014] The control execution module is used to receive a power-off control instruction and disconnect the electrical connection between the charging gun and the power supply through a relay.

[0015] Furthermore, it also includes: an alarm module, the alarm module is electrically connected to the micro-control module, wherein;

[0016] The alarm module is used to receive the alarm signal of the micro-control module when the micro-control module sends a power-off control instruction to the control execution module.

[0017] Furthermore, the temperature acquisition module is a semiconductor temperature sensor.

[0018] Furthermore, the charging gun further comprises: a heat sink and a detachable cooling fan provided outside the charging gun, and the cooling fan is electrically connected to the micro-control module, wherein;

[0019] The heat sink is used for heat conduction inside the charging gun;

[0020] The heat dissipation fan is used to dissipate heat from the heat sink.

[0021] Furthermore, the microcontroller module controls the speed of the cooling fan, including the following steps:

[0022] If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it means that the temperature of the current fever risk point is abnormally high, and the microcontroller module sends a start control instruction to the cooling fan;

[0023] If the current temperature value is greater than the temperature warning threshold, and the charging power decreases by 10% every time the temperature value increases by a preset value, the speed of the cooling fan is increased by one level until the current temperature value is less than the temperature warning threshold, then the microcontroller module sends a stop control instruction to the cooling fan.

[0024] Another aspect of the present invention is:

[0025] A method for detecting over-temperature of a DC charging gun, comprising the following steps:

[0026] Deploy the temperature collection module at the heating risk point of the charging gun in advance and collect the temperature information inside the charging gun;

[0027] The microcontrol module receives the temperature information to obtain the temperature value, and compares the temperature value with the preset temperature warning threshold and the temperature danger threshold, respectively; if the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally increased, and a power adjustment instruction is sent to the power adjustment module; if the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it indicates that the temperature of the current fever risk point is overheated, and a power-off control instruction is sent to the control execution module;

[0028] The power regulation module receives the power regulation instruction and reduces the charging power of the charging gun, including: if the current temperature value is greater than the temperature warning threshold, and the temperature value increases by a preset intermediate value, the charging power is reduced by 10%;

[0029] The control execution module receives the power-off control instruction and disconnects the electrical connection between the charging gun and the power supply through a relay.

[0030] The following steps are also included:

[0031] The charging gun is pre-equipped with a heat sink to transfer the internal heat of the charging gun to the heat sink, and a detachable cooling fan is configured outside the charging gun to match the heat sink;

[0032] The microcontroller module controls the speed of the cooling fan, including the following steps:

[0033] If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it means that the temperature of the current fever risk point is abnormally high, and the microcontroller module sends a start control instruction to the cooling fan;

[0034] If the current temperature value is greater than the temperature warning threshold, and the charging power decreases by 10% every time the temperature value increases by a preset value, the speed of the cooling fan is increased by one level until the current temperature value is less than the temperature warning threshold, then the microcontroller module sends a stop control instruction to the cooling fan.

[0035] Beneficial effects of the present invention:

[0036] 1. The present invention deploys a heating risk point of the charging gun, collects temperature information inside the charging gun, and performs signal conditioning on the collected temperature information and transmits it to the microcontroller module to obtain a temperature value, and compares the temperature value with a preset temperature warning threshold and a temperature danger threshold, respectively, wherein; if the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current heating risk point is abnormally high, and a power adjustment instruction is sent to the power adjustment module; if the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it indicates that the temperature of the current heating risk point is overheated, and a power-off control instruction is sent to the control execution module. At the same time, the power adjustment module reduces the charging power of the charging gun and the control execution module receives the power-off control instruction, and disconnects the electrical connection between the charging gun and the power supply through a relay, thereby realizing a DC charging gun charging over-temperature detection protection mechanism, which maintains stable charging on the one hand. Power, so that the temperature of the charging gun is kept within a reasonable range, thereby avoiding problems such as increased resistance and limited charging power due to overheating, maintaining a relatively stable charging power, reducing the extension of charging time, and improving energy utilization. By reasonably controlling the temperature of the charging gun, the energy loss caused by overheating is reduced, the energy utilization rate is improved, and the charging process is more efficient and energy-saving; on the other hand, it can monitor the temperature of the charging gun in real time and take timely measures when the temperature is too high, which can effectively prevent safety hazards such as insulation performance degradation, component damage and short circuit, thermal runaway caused by overheating, avoid accidents such as fire and electric shock, and ensure the safety of users and equipment. Overheating may cause damage to the battery of the electric vehicle. By detecting the temperature of the charging gun, the battery is indirectly protected, reducing battery overheating, bulging, shortened life and other problems caused by overheating of the charging gun, thereby extending the battery life.

[0037] 2. The present invention configures a heat sink and a detachable heat dissipation fan through the charging gun, and controls the speed of the heat dissipation fan through the micro-control module. If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally increased, and the micro-control module sends a start control instruction to the heat dissipation fan; the current temperature value is greater than the temperature warning threshold, and the charging power is reduced by 10% every time the temperature value increases by a preset intermediate value, then the speed of the heat dissipation fan is increased by one level, until the current temperature value is less than the temperature warning threshold, then the micro-control module sends a stop control instruction to the heat dissipation fan. On the one hand, the detachable heat dissipation fan can directly perform air cooling on the DC charging gun, can quickly blow away the hot air around the charging gun, and introduce cold air, thereby effectively reducing the temperature of the charging gun, greatly improving the heat dissipation condition, and is suitable for high temperature environments or continuous In the scenario of continuous charging for a long time, it can ensure that the charging gun works within a safe temperature range. On the other hand, the external detachable cooling fan is easy to install, does not require complicated modifications to the internal structure of the charging gun, will not affect the normal use of the charging gun, and can be adjusted and installed according to charging guns of different models and sizes. If the cooling fan fails, it is also easy to disassemble and replace, and the maintenance cost is low. At the same time, overheating may cause the insulation performance of the charging gun to decline, components to be damaged, and even cause fires and other safety accidents. The external detachable cooling fan cooperates with the heat sink to reduce component damage and failures caused by overheating, extend the service life of the charging gun, reduce maintenance and replacement costs, and help maintain the stable performance of the charging gun, reduce failures caused by excessive temperature, and improve the reliability and stability of the charging gun, so that it can better adapt to long-term and frequent charging work. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 This is a principle block diagram of a DC charging gun charging over-temperature detection system according to an embodiment of the present invention;

[0040] Figure 2 It is a flow chart of a method for detecting over-temperature of a DC charging gun according to an embodiment of the present invention.

[0041] In the figure:

[0042] 1. Temperature acquisition module; 2. Signal conditioning circuit module; 3. Microcontroller module; 4. Power regulation module; 5. Control execution module; 6. Alarm module; 7. Heat sink; 8. Cooling fan. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0044] According to an embodiment of the present invention, a DC charging gun charging over-temperature detection system is provided.

[0045] like Figure 1 As shown, the DC charging gun charging over-temperature detection system according to an embodiment of the present invention includes: a temperature acquisition module 1, a signal conditioning circuit module 2, a microcontroller module 3, a power regulation module 4 and a control execution module 5, wherein;

[0046] Temperature collection module 1, used to deploy heating risk points of charging guns and collect temperature information inside charging guns;

[0047] Among them, the temperature acquisition module 1 is a semiconductor temperature sensor;

[0048] In this technical solution, the temperature acquisition module 1 is precisely distributed at each heating risk point of the charging gun to ensure comprehensive and accurate capture of temperature changes, while the semiconductor temperature sensor has good linearity, high precision, and easy-to-process output signals.

[0049] The signal conditioning circuit module 2 is used to perform signal conditioning on the collected temperature information and transmit it to the microcontroller module 3;

[0050] In this technical solution, since the electrical signal output by the temperature acquisition module 1 is often very weak and may be accompanied by noise interference, the temperature information signal is amplified by an operational amplifier, and the high-frequency or low-frequency noise is removed by a filter composed of capacitors, inductors and other components to ensure that a stable and reliable temperature signal is received later.

[0051] The microcontroller module 3 is used to receive the temperature information after signal conditioning to obtain the temperature value, and compare the temperature value with the preset temperature warning threshold and temperature danger threshold, wherein;

[0052] If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it means that the temperature of the current fever risk point is abnormally high, and a power adjustment instruction is sent to the power adjustment module 4;

[0053] If the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it means that the current fever risk point temperature is overheated, and a power-off control instruction is sent to the control execution module 5 and an alarm signal is sent to the alarm module 6;

[0054] In addition, when in use, the microcontroller module 3 is also electrically connected to the charging pile display screen and the host computer monitoring system, so as to transmit the charging gun temperature information to the charging pile display screen and upload it to the host computer monitoring system.

[0055] The power regulation module 4 is used to receive the power regulation instruction and reduce the charging power of the charging gun, including: if the current temperature value is greater than the temperature warning threshold, and the temperature value increases by a preset intermediate value, the charging power is reduced by 10%;

[0056] This technical solution, when applied, pre-sets a preset intermediate value according to the thermal characteristics of the charging gun and the power adjustment range. When applied, the preset intermediate value can be 1°C. That is, the current temperature value is greater than the temperature warning threshold, and the charging power is reduced by 10% for every 1°C increase in the temperature value, to achieve dynamic adjustment of the charging power until the current temperature value is less than the temperature warning threshold.

[0057] Specifically, because charging power is directly related to heat generation power, reducing charging power can reduce heat generation. In application, if the normal charging power is 100kW, when the temperature rises to the temperature warning threshold, the charging power can be gradually reduced to 60kW or even lower until the temperature is lower than the temperature warning threshold, and then the charging power can be gradually restored, which can effectively avoid excessive temperature and ensure the continuity of charging to a certain extent.

[0058] The control execution module 5 is used to receive the power-off control instruction and disconnect the electrical connection between the charging gun and the power supply through the relay;

[0059] In this technical solution, if the charging power of the charging gun is reduced, the current temperature of the charging gun continues to rise, that is, the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it means that the current heating risk point temperature is overtemperature, and a power-off control command is received, and the electrical connection between the charging gun and the power supply is disconnected through a relay.

[0060] Specifically, when used, the relay acts as a circuit switch. After receiving the instruction from the microcontroller module 3, it will quickly operate to disconnect the electrical connection between the charging gun and the power supply, prevent the temperature from rising further, and fundamentally avoid the risk of thermal runaway. When the temperature value is lower than the temperature warning threshold, charging will be resumed after manual or automatic reset.

[0061] Alarm module 6, used to receive alarm signals and respond to alarms;

[0062] In the present technical solution, the alarm module 6 can adopt an audible and visual alarm, which emits a high-decibel beep and flashing strong light to alert on-site personnel; or push over-temperature alarm notifications to the charging pile linkage station broadcast, warning lights and other facilities, as well as the associated mobile phone APP, so that the operation and maintenance personnel can know remotely and carry out all-round early warning.

[0063] The charging gun further includes: a heat sink 7 and a detachable heat dissipation fan 8 provided outside the charging gun, wherein the heat sink 7 is used for heat conduction inside the charging gun; and the heat dissipation fan 8 is used for dissipating heat from the heat sink 7;

[0064] In this technical solution, the heat sink 7 is made of aluminum alloy with high thermal conductivity. When used, it is set inside the shell of the charging gun. One side of the heat sink is adapted to the heating component of the charging gun, such as the power component, and the other side is in contact with the outside air to increase the heat dissipation area and improve the heat dissipation efficiency. When the temperature of the charging gun rises, the heat will be transferred to the heat sink. The heat sink 7 has a large surface area and dissipates the heat to the outside air.

[0065] In addition, for the above-mentioned cooling fan 8, a detachable structure is adopted to be connected to the outside of the charging gun, and used in conjunction with the heat sink 7. The cooling fan 8 can accelerate the air flow, so that the hot air around the heat sink 7 is quickly replaced by cold air, taking away more heat.

[0066] Specifically, during application, if the charging gun cannot dissipate heat effectively due to the frequent use of the charging gun in summer or on holidays, a detachable structure can be used to connect the cooling fan 8 to the outside of the charging gun to improve the heat dissipation effect of the charging gun.

[0067] In addition, the speed of the cooling fan 8 is adjusted according to the dynamically adjusted charging power, as follows:

[0068] If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it means that the temperature of the current fever risk point is abnormally high, and the microcontroller module 3 sends a start control instruction to the cooling fan 8;

[0069] If the current temperature value is greater than the temperature warning threshold, and the charging power decreases by 10% every time the temperature value increases by the preset intermediate value, the speed of the cooling fan 8 is increased by one level until the current temperature value is less than the temperature warning threshold, then the microcontroller module 3 sends a stop control instruction to the cooling fan 8.

[0070] Specifically, when applied, the current temperature value is greater than the temperature warning threshold, and the charging power decreases by 10% for every 1°C increase in the temperature value, then the speed of the cooling fan 8 is increased by one level. The speed of the cooling fan 8 can be automatically increased from 1000 rpm to 2000 rpm, thereby increasing the fan speed and enhancing the heat dissipation effect.

[0071] According to an embodiment of the present invention, a method for detecting over-temperature of charging of a DC charging gun is provided.

[0072] like Figure 2 As shown, the DC charging gun charging over-temperature detection method according to an embodiment of the present invention includes the following steps:

[0073] The temperature collection module 1 is deployed in advance at the heating risk point of the charging gun, and the temperature information inside the charging gun is collected;

[0074] The microcontroller module 3 receives the temperature information to obtain the temperature value, and compares the temperature value with the preset temperature warning threshold and the temperature danger threshold, respectively. If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally high, and a power adjustment instruction is sent to the power adjustment module 4. If the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it indicates that the temperature of the current fever risk point is overheated, and a power-off control instruction is sent to the control execution module 5.

[0075] The power regulation module 4 receives the power regulation instruction and reduces the charging power of the charging gun, including: if the current temperature value is greater than the temperature warning threshold, and the temperature value increases by a preset intermediate value, the charging power is reduced by 10%;

[0076] The control execution module 5 receives the power-off control instruction and disconnects the electrical connection between the charging gun and the power source through a relay.

[0077] The following steps are also included:

[0078] The charging gun is pre-equipped with a heat sink 7 to transfer the internal heat of the charging gun to the heat sink 7, and a detachable heat dissipation fan 8 is configured outside the charging gun in accordance with the heat sink 7;

[0079] The microcontroller module 3 controls the speed of the cooling fan 8, including the following steps:

[0080] If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it means that the temperature of the current fever risk point is abnormally high, and the microcontroller module 3 sends a start control instruction to the cooling fan 8;

[0081] If the current temperature value is greater than the temperature warning threshold, and the charging power decreases by 10% every time the temperature value increases by the preset intermediate value, the speed of the cooling fan 8 is increased by one level until the current temperature value is less than the temperature warning threshold, then the microcontroller module 3 sends a stop control instruction to the cooling fan 8.

[0082] In summary, with the help of the above technical solution of the present invention, the following effects can be achieved:

[0083] 1. The present invention deploys a heating risk point of the charging gun, collects temperature information in the charging gun, and performs signal conditioning on the collected temperature information and transmits it to the microcontroller module 3 to obtain the temperature value, and compares the temperature value with the preset temperature warning threshold and the temperature danger threshold, respectively, wherein; if the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current heating risk point is abnormally high, and a power adjustment instruction is sent to the power regulation module 4; if the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it indicates that the temperature of the current heating risk point is overheated, and a power-off control instruction is sent to the control execution module 5. At the same time, the power regulation module 4 reduces the charging power of the charging gun and the control execution module 5 receives the power-off control instruction, and disconnects the electrical connection between the charging gun and the power supply through a relay, so as to realize the over-temperature detection protection mechanism of the DC charging gun. On the one hand, it maintains a stable charging power. rate, so that the temperature of the charging gun is kept within a reasonable range, thereby avoiding problems such as increased resistance and limited charging power due to overheating, maintaining a relatively stable charging power, reducing the extension of charging time, and improving energy utilization. By reasonably controlling the temperature of the charging gun, the energy loss caused by overheating is reduced, the energy utilization rate is improved, and the charging process is more efficient and energy-saving; on the other hand, it can monitor the temperature of the charging gun in real time and take timely measures when the temperature is too high, which can effectively prevent safety hazards such as reduced insulation performance, component damage and short circuit, thermal runaway caused by overheating, avoid accidents such as fire and electric shock, and ensure the safety of users and equipment. Overheating may cause damage to the battery of the electric vehicle. By detecting the temperature of the charging gun, the battery is indirectly protected, reducing problems such as battery overheating, bulging, and shortened life due to overheating of the charging gun, and extending the battery life.

[0084] 2. The present invention configures a heat sink 7 and a detachable heat dissipation fan 8 through the charging gun, and controls the speed of the heat dissipation fan 8 through the micro-control module 3. If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally increased, and the micro-control module 3 sends a start control instruction to the heat dissipation fan 8; if the current temperature value is greater than the temperature warning threshold, and the charging power is reduced by 10% every time the temperature value increases by a preset intermediate value, the speed of the heat dissipation fan 8 is increased by one level until the current temperature value is less than the temperature warning threshold, then the micro-control module 3 sends a stop control instruction to the heat dissipation fan 8. On the one hand, the detachable heat dissipation fan 8 can directly perform air cooling on the DC charging gun, and can quickly blow away the hot air around the charging gun and introduce cold air, thereby effectively reducing the temperature of the charging gun, greatly improving the heat dissipation condition, and is suitable for high temperature environments or continuous In the scenario of long-term charging, it can ensure that the charging gun works within a safe temperature range. On the other hand, the external detachable cooling fan 8 is easy to install and does not require complicated modifications to the internal structure of the charging gun, which will not affect the normal use of the charging gun. It can be adjusted and installed according to charging guns of different models and sizes. If the cooling fan fails, it is also easy to disassemble and replace, and the maintenance cost is low. At the same time, overheating may cause the insulation performance of the charging gun to deteriorate, components to be damaged, and even cause fires and other safety accidents. The external detachable cooling fan 8 cooperates with the heat sink 7 to reduce component damage and failures caused by overheating, extend the service life of the charging gun, reduce maintenance and replacement costs, and help maintain the stable performance of the charging gun, reduce failures caused by excessive temperature, and improve the reliability and stability of the charging gun, so that it can better adapt to long-term and frequent charging work.

[0085] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. After considering the disclosure of the specification and the examples, those skilled in the art will easily think of other embodiments of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and the examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.

[0086] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A DC charging gun charging over-temperature detection system, characterized in that: include: A temperature acquisition module (1), a signal conditioning circuit module (2), a microcontroller module (3), a power regulation module (4) and a control execution module (5), wherein; The temperature collection module (1) is used to deploy heating risk points of the charging gun and collect temperature information inside the charging gun; The signal conditioning circuit module (2) is used to perform signal conditioning on the collected temperature information and transmit the signal to the microcontroller module (3); The microcontroller module (3) is used to receive the temperature information after signal conditioning to obtain a temperature value, and compare the temperature value with a preset temperature warning threshold and a temperature danger threshold, respectively, wherein; If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally high, and a power adjustment instruction is sent to the power adjustment module (4); if the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it indicates that the temperature of the current fever risk point is overheated, and a power-off control instruction is sent to the control execution module (5); The power adjustment module (4) is used to receive a power adjustment instruction and reduce the charging power of the charging gun, which includes: if the current temperature value is greater than the temperature warning threshold, and the temperature value increases by a preset intermediate value, the charging power is reduced by 10%; The control execution module (5) is used to receive a power-off control instruction and disconnect the electrical connection between the charging gun and the power source through a relay.

2. The DC charging gun charging over-temperature detection system according to claim 1, characterized in that: Also includes: An alarm module (6), the alarm module (6) is electrically connected to the microcontroller module (3), wherein; The alarm module (6) is used to receive an alarm signal from the microcontrol module (3) when the microcontrol module (3) sends a power-off control instruction to the control execution module (5).

3. The DC charging gun charging over-temperature detection system according to claim 1, characterized in that: The temperature acquisition module (1) is a semiconductor temperature sensor.

4. The DC charging gun charging over-temperature detection system according to claim 1, characterized in that: The charging gun further comprises: a heat sink (7) and a detachable heat dissipation fan (8) arranged outside the charging gun, and the heat dissipation fan (8) is electrically connected to the micro-control module (3), wherein; The heat sink (7) is used for heat conduction inside the charging gun; The heat dissipation fan (8) is used to dissipate heat from the heat sink (7).

5. The DC charging gun charging over-temperature detection system according to claim 4, characterized in that: The microcontrol module (3) controls the rotation speed of the cooling fan (8), comprising the following steps: If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally high, and the microcontroller module (3) sends a start control instruction to the cooling fan (8); If the current temperature value is greater than the temperature warning threshold, and the charging power decreases by 10% every time the temperature value increases by a preset intermediate value, the speed of the cooling fan (8) is increased by one level until the current temperature value is less than the temperature warning threshold, and the microcontroller module (3) sends a stop control instruction to the cooling fan (8).

6. A method for detecting over-temperature of a DC charging gun, used in the method of the DC charging gun over-temperature detection system according to any one of claims 1 to 5, characterized in that: The following steps are involved: The temperature collection module (1) is deployed in advance at the heating risk point of the charging gun, and the temperature information inside the charging gun is collected; The microcontroller module (3) receives the temperature information to obtain a temperature value, and compares the temperature value with a preset temperature warning threshold and a temperature danger threshold, respectively, wherein; If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally high, and a power adjustment instruction is sent to the power adjustment module (4); if the current temperature value is greater than the temperature warning threshold and greater than the temperature danger threshold, it indicates that the temperature of the current fever risk point is overheated, and a power-off control instruction is sent to the control execution module (5); The power regulation module (4) receives the power regulation instruction and reduces the charging power of the charging gun, which includes: if the current temperature value is greater than the temperature warning threshold, and the temperature value increases by a preset intermediate value, the charging power is reduced by 10%; The control execution module (5) receives the power-off control instruction and disconnects the electrical connection between the charging gun and the power source through a relay.

7. The method for detecting over-temperature of a DC charging gun according to claim 6, characterized in that: The following steps are also included: The charging gun is pre-configured with a heat sink (7) to transfer the internal heat of the charging gun to the heat sink (7), and a detachable heat dissipation fan (8) is configured outside the charging gun in accordance with the heat sink (7); The microcontroller module (3) controls the rotation speed of the cooling fan (8), comprising the following steps: If the current temperature value is greater than the temperature warning threshold and less than the temperature danger threshold, it indicates that the temperature of the current fever risk point is abnormally high, and the microcontroller module (3) sends a start control instruction to the cooling fan (8); If the current temperature value is greater than the temperature warning threshold, and the charging power decreases by 10% every time the temperature value increases by a preset intermediate value, the speed of the cooling fan (8) is increased by one level until the current temperature value is less than the temperature warning threshold, and the microcontroller module (3) sends a stop control instruction to the cooling fan (8).

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