CN117301911A

CN117301911A - Control guide circuit applied to electric vehicle and liquid cooling equipment

Info

Publication number: CN117301911A
Application number: CN202311287640.0A
Authority: CN
Inventors: 程东; 胡明贵; 廖梦雄
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2023-09-30
Filing date: 2023-09-30
Publication date: 2023-12-29

Abstract

The application provides a be applied to electric vehicle and liquid cooling equipment's control guidance circuit, control guidance circuit is including connecting the affirmation circuit, and electric vehicle includes liquid cooling socket and liquid cooling connection affirmation socket, and liquid cooling equipment includes liquid cooling plug and liquid cooling connection affirmation plug. Under the condition that the liquid cooling plug is connected with the liquid cooling socket, the vehicle end connection confirming circuit and the pile end connection confirming circuit form a loop, and the voltage of a detection point in the loop is used for indicating the connection state of the liquid cooling plug and the liquid cooling socket. The application can solve the heat dissipation problem when the power battery is charged, and improves the charging power of the charging device for the power battery.

Description

Control guide circuit applied to electric vehicle and liquid cooling equipment

Technical Field

The application relates to the field of new energy automobiles, in particular to a control guide circuit applied to electric vehicles and liquid cooling equipment.

Background

With the breakthrough of the high-power battery charging technology, the battery can be fully charged in a short time. However, in the current practical application, when the charging device performs high-power charging on the power battery, the heat generated by the power battery is greatly increased. If the heat cannot be removed in time, the normal operation of the charging device for high-power charging of the power battery can be affected.

Electric vehicles typically incorporate a thermal management system that dissipates heat from the power cells. However, with the increase of the charging power, for example, in the super-charging scenario, the heat productivity of the power battery is increased, and the effect of heat dissipation by only relying on the thermal management system is limited, so that the heat dissipation capability of the thermal management system cannot meet the heat dissipation requirement of the power battery during high-power charging.

Disclosure of Invention

The utility model provides a be applied to electric vehicle and liquid cooling equipment's control guide circuit when charging device carries out high-power charging for electric vehicle's power battery, and the liquid cooling equipment under the car can carry the coolant liquid to power battery's thermal management system to can solve the heat dissipation problem when power battery charges, improve charging device and charge power for power battery.

In a first aspect, a control guidance circuit for an electric vehicle and a liquid cooling device is provided, the control guidance circuit including a connection confirmation circuit, the electric vehicle including a liquid cooling socket and a liquid cooling connection confirmation socket, the liquid cooling device including a liquid cooling plug and a liquid cooling connection confirmation plug. One end of the liquid cooling plug is used for connecting with one end of the liquid cooling plug, the other end of the liquid cooling plug is used for connecting with a thermal management system of a power battery of the electric vehicle, and the other end of the liquid cooling plug is used for receiving or outputting cooling liquid. The connection confirmation circuit comprises a vehicle end connection confirmation circuit and a pile end connection confirmation circuit, wherein the vehicle end connection confirmation circuit is positioned on the electric vehicle, the pile end connection confirmation circuit is positioned on the liquid cooling equipment and is connected with the liquid cooling socket, and the pile end connection confirmation circuit is connected with the liquid cooling plug. Under the condition that the liquid cooling plug is connected with the liquid cooling socket, the vehicle end connection confirming circuit and the pile end connection confirming circuit form a loop, and the voltage of a detection point in the loop is used for indicating the connection state of the liquid cooling plug and the liquid cooling socket.

In this embodiment of the present application, the voltage at the detection point in the control guiding circuit may indicate the connection state of the liquid cooling plug and the liquid cooling socket. Therefore, under the condition that the voltage of the detection point indicates that the liquid cooling socket and the liquid cooling plug are successfully connected, when the charging pile charges the power battery with high power, the liquid cooling device can realize cooling of the power battery by injecting a cooling medium into the power battery, so that the heat dissipation problem during charging of the power battery can be solved, and the charging power of the charging device for the power battery is improved.

With reference to the first aspect, in one possible design, the liquid cooling device further includes a ground plug, the electric vehicle further includes a ground socket, one end of the ground plug is used for connecting with one end of the ground socket, the other end of the ground plug is used for connecting with the device ground platform, the other end of the ground socket is used for connecting with the vehicle body ground platform, the liquid cooling connection confirmation socket includes a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, and the liquid cooling connection confirmation plug includes a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug. The vehicle end connection confirmation circuit comprises a first vehicle end connection confirmation circuit, the first vehicle end connection confirmation circuit comprises a first resistor and a first voltage source, and the first liquid cooling connection confirmation socket is connected with the first voltage source through the first resistor. The pile end connection confirmation circuit comprises a first pile end connection confirmation circuit, the first pile end connection confirmation circuit comprises a second resistor, and the first liquid cooling connection confirmation plug is connected with the equipment ground platform through the second resistor. The detection point is positioned between the first liquid cooling connection confirmation socket and the first resistor.

With reference to the first aspect, in one possible design, the first liquid-cooled connection confirms that the voltage at the detection point between the socket and the first resistor reaches a first preset value, indicating that the liquid-cooled plug and the liquid-cooled socket are successfully connected.

In this embodiment of the present application, since the detection point set in the present application is connected to the first voltage source in the electric vehicle, when the voltage at the detection point is the voltage output by the first voltage source, it is described that the liquid cooling socket is not connected to the liquid cooling plug. And under the condition that the voltage of the detection point reaches a first preset value, identifying that the liquid cooling socket is connected with the liquid cooling plug. The voltage of the detection point can indicate the connection state of the liquid cooling socket and the liquid cooling plug, and when the voltage of the detection point indicates that the liquid cooling socket and the liquid cooling plug are successfully connected, when the charging pile charges the power battery with high power, the liquid cooling device can realize cooling of the power battery by injecting a cooling medium into the power battery, so that the heat dissipation requirement of the power battery during high-power charging can be met, the charging power of the power battery can be improved, and the charging duration of the electric vehicle can be reduced.

With reference to the first aspect, in one possible design, the electric vehicle further includes a ground socket, one end of the ground socket is used for connecting a ground plug of the liquid cooling gun, the other end of the ground socket is connected to the vehicle body ground platform, the vehicle end connection confirmation circuit further includes a second vehicle end connection confirmation circuit, the second vehicle end connection confirmation circuit includes a third resistor, and the second liquid cooling connection confirmation socket is connected to the vehicle body ground platform through the third resistor. The pile end connection confirmation circuit further comprises a second pile end connection confirmation circuit, the second pile end connection confirmation circuit comprises a fourth resistor and a second voltage source, and the second liquid cooling connection confirmation plug is connected with the second voltage source through the fourth resistor. The detection point is positioned between the second liquid cooling connection confirmation plug and the fourth resistor.

With reference to the first aspect, in one possible design, the voltage at the detection point between the first liquid cooling connection confirmation socket and the first resistor reaches a first preset value, and the voltage at the detection point between the second liquid cooling connection confirmation plug and the fourth resistor reaches a second preset value, which indicates that the liquid cooling plug and the liquid cooling socket are successfully connected.

In this embodiment of the present application, since the detection point set in the present application is connected to the voltage source, when the voltage at the detection point is the voltage output by the voltage source, it is described that the liquid cooling socket is not connected to the liquid cooling plug. And under the condition that the voltages of the two detection points respectively reach a first preset value and a second preset value, the identification of the connection of the liquid cooling socket and the liquid cooling plug is described. The voltage of the detection point can indicate the connection state of the liquid cooling socket and the liquid cooling plug, and when the voltage of the detection point indicates that the liquid cooling socket and the liquid cooling plug are successfully connected, when the charging pile charges the power battery with high power, the liquid cooling device can realize cooling of the power battery by injecting a cooling medium into the power battery, so that the heat dissipation requirement of the power battery during high-power charging can be met, the charging power of the power battery can be improved, and the charging duration of the electric vehicle can be reduced.

With reference to the first aspect, in one possible design, the second pile end connection confirmation circuit further includes a normally closed switch, and the normally closed switch is located between the fourth resistor and the second liquid-cooled connection confirmation plug.

With reference to the first aspect, in one possible design, the detection point includes two detection points, where one detection point is located between the fourth resistor and the normally closed switch, and the other detection point is located between the second liquid-cooled connection confirmation plug and the normally closed switch.

With reference to the first aspect, in one possible design, the voltage at the detection point between the fourth resistor and the normally closed switch and the voltage at the detection point between the second liquid cooling connection confirmation plug and the normally closed switch reach a second preset value, which indicates that the liquid cooling plug and the liquid cooling socket are successfully connected.

In this embodiment of the application, the connection state of the liquid cooling socket and the liquid cooling plug is instructed to the voltage of two detection points, can improve the liquid cooling equipment and judge the correct rate of the connection state of liquid cooling socket and liquid cooling plug according to the voltage of these two detection points, when charging device charges power battery with high-power, liquid cooling equipment is through the cooling medium that pours into power battery into in order to realize the cooling to power battery to can satisfy the heat dissipation demand of power battery when high-power charging, be favorable to improving power battery's charge power, reduce electric vehicle's charge duration.

With reference to the first aspect, in one possible design, the electric vehicle further includes a ground socket, one end of the ground socket is used for connecting a ground plug of the liquid cooling gun, the other end of the ground socket is connected to the vehicle body ground platform, the liquid cooling connection confirmation socket includes a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, and the liquid cooling connection confirmation plug includes a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug. The vehicle end connection confirmation circuit comprises a third vehicle end connection confirmation circuit and a fourth vehicle end connection confirmation circuit, the third vehicle end connection confirmation circuit comprises a fifth resistor and a third voltage source, the first liquid cooling connection confirmation socket is connected with the third voltage source through the fifth resistor, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform. The pile end connection confirmation circuit comprises a wire, and the first liquid cooling connection confirmation plug is connected with the second liquid cooling connection confirmation plug through the wire. The detection point is positioned between the fifth resistor and the first liquid cooling connection confirmation socket.

With reference to the first aspect, in one possible design, the fifth resistor and the first liquid-cooled connection confirm that the voltage at the detection point between the sockets reaches a third preset value, indicating that the liquid-cooled plug and the liquid-cooled socket are successfully connected.

In this embodiment, the electric vehicle can confirm according to the fifth resistance and the first liquid cooling that the voltage of the check point between the socket reaches the default and judge that liquid cooling plug and liquid cooling socket are connected successfully, when charging device charges with high-power to power battery, liquid cooling equipment is through injecting cooling medium in order to realize the cooling to power battery to can satisfy the heat dissipation demand of power battery when high-power charging, be favorable to improving power battery's charge power, reduce electric vehicle's charge duration. In addition, the vehicle end connection confirming circuit and the pile end connection confirming circuit in the embodiment of the application are simple in circuit design and can be extremely simplified.

With reference to the first aspect, in one possible design, the electric vehicle further includes a ground socket, one end of the ground socket is used for connecting a ground plug of the liquid cooling gun, the other end of the ground socket is connected to the vehicle body ground platform, the liquid cooling connection confirmation socket includes a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, and the liquid cooling connection confirmation plug includes a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug. The vehicle end connection confirmation circuit comprises a fifth vehicle end connection confirmation circuit and a sixth vehicle end connection confirmation circuit, the fifth vehicle end connection confirmation circuit comprises a fourth voltage source, the sixth vehicle end connection confirmation circuit comprises a sixth resistor, the first liquid cooling connection confirmation socket is connected with the fourth voltage source, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform through the sixth resistor. The pile end connection confirmation circuit comprises a wire, and the first liquid cooling connection confirmation plug is connected with the second liquid cooling connection confirmation plug through the wire. The detection point is positioned between the sixth resistor and the second liquid cooling connection confirmation socket.

With reference to the first aspect, in one possible design, the sixth resistor and the second liquid-cooled connection confirm that the voltage at the detection point between the sockets reaches a fourth preset value, which indicates that the liquid-cooled plug and the liquid-cooled socket are successfully connected.

In this embodiment, the electric vehicle can confirm according to the voltage of the check point between the socket that the sixth resistance is connected with the second liquid cooling and reach fourth default and judge that liquid cooling plug and liquid cooling socket are connected successfully, when charging device charges with high-power to power battery, liquid cooling equipment is through injecting cooling medium in order to realize the cooling to power battery to can satisfy the heat dissipation demand of power battery when high-power charging, be favorable to improving power battery's charge power, reduce electric vehicle's charge duration. In addition, the vehicle end connection confirming circuit and the pile end connection confirming circuit in the embodiment of the application are simple in circuit design and can be extremely simplified.

With reference to the first aspect, in one possible design, the control guidance circuit further includes a communication circuit, the liquid cooling device further includes a communication plug, and the vehicle outlet further includes a communication outlet. The communication circuit comprises a first communication circuit positioned on the liquid cooling equipment and a second communication circuit positioned on the electric vehicle, one end of the first communication circuit is connected with the controller of the liquid cooling equipment, the other end of the first communication circuit is connected with the communication plug, one end of the second communication circuit is connected with the controller of the electric vehicle, and the other end of the second communication circuit is connected with the communication socket.

With reference to the first aspect, in one possible design, the control guidance circuit further includes an auxiliary power circuit, the liquid cooling device further includes an auxiliary power plug, and the vehicle outlet further includes an auxiliary power outlet. The auxiliary power supply circuit comprises a first auxiliary power supply circuit located on the liquid cooling device and a second auxiliary power supply circuit located on the electric vehicle, one end of the first auxiliary power supply circuit is connected with a controller of the liquid cooling device, the other end of the first auxiliary power supply circuit is connected with an auxiliary power supply plug, one end of the second auxiliary power supply circuit is connected with the controller of the electric vehicle, and the other end of the second auxiliary power supply circuit is connected with an auxiliary power supply socket.

Drawings

Fig. 1 is a schematic structural diagram of a charging system according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of another charging system according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a heat dissipation system according to an embodiment of the present application.

Fig. 4 is a schematic diagram of another heat dissipation system according to an embodiment of the present application

Fig. 5 is a schematic diagram of a heat dissipation system according to another embodiment of the present application

Fig. 6 is a schematic diagram of a heat dissipation system according to another embodiment of the present application

Fig. 7 is a schematic structural diagram of still another charging system according to an embodiment of the present application.

Fig. 8 is a schematic diagram of a liquid injection interface according to an embodiment of the present application.

Fig. 9 is a schematic diagram of another liquid injection interface according to an embodiment of the present disclosure.

Fig. 10 is a schematic diagram of yet another heat dissipation system according to an embodiment of the present application.

Fig. 11 is a schematic diagram of yet another heat dissipation system according to an embodiment of the present application.

Fig. 12 is a schematic view of yet another heat dissipation system according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone.

Reference in the specification to "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in some embodiments" or the like in various places throughout this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The reference to "equal to" in this application is not strictly equal to, but is within the tolerance of the error.

With the development of new energy automobile technology, many automobile manufacturers gradually push out electric vehicles, and the electric vehicles become choices of a plurality of users due to energy conservation, environmental protection and relatively mature technology.

The present application may be applied to a system in which a power supply device and a load are mutually charged through a power distribution matrix. In particular, for a system including a charging pile and an electric vehicle, the charging pile may use electric energy from a power grid to charge the electric vehicle, and the electric vehicle may also reversely output its own electric energy to the power grid.

Fig. 1 schematically illustrates a structure of a charging system 10 according to an embodiment of the present application.

In combination with (a) in fig. 1 and (b) in fig. 1, the charging system 10 may include a charging device 11 and a vehicle 12.

In some embodiments, as shown in fig. 1 (a), the charging device 11 may be a split device. Specifically, the charging device 11 may include a charging main body 111, at least one charging terminal 112, and at least one charging gun 113. The charging main machine 111 is electrically connected with each charging terminal 112, each charging terminal 112 is electrically connected with a charging gun 113 through a cable, and the charging gun 113 is used for being electrically connected with the electric automobile 12.

The charging host 111 includes a plurality of power conversion devices, which can convert ac power from the external power grid 20 into dc power, and then transmit the dc power to the charging terminal 112, and transmit the dc power to the electric vehicle 12 through the charging gun 113 electrically connected to the charging terminal 112. The plurality of power conversion devices may include, for example, an alternating current-to-direct current (AC-DC) conversion device and a direct current-to-direct current (DC-DC) conversion device.

In a specific implementation, the user may insert the charging gun 113 into the charging interface of the electric vehicle 12, so that the charging gun 113 is electrically connected to the power battery of the electric vehicle 12, and the charging host 111 may further charge the power battery of the electric vehicle 12 through the charging gun 113.

Charging terminal 112 may include a housing, a human-machine interface, a charging control unit, a metering charging unit, etc., and charging terminal 112 may be used for information interaction, energy transfer, metering charging, etc. with vehicle 12.

In other embodiments, as shown in fig. 1 (b), the charging device 11 may be an integral charging device. Specifically, the charging device 11 may include only the charging host 111 and at least one charging gun 113 electrically connected to the charging host 111, and not include the charging terminal 112, and a man-machine interface, a charging control unit, a metering charging unit, and the like may be directly provided in the charging host 111. The plurality of power conversion devices in the charging main 111 convert ac power from the external power grid 20 into stable dc power, and then directly transmit the converted dc power to the electric vehicle 12 through the charging gun 113.

In the charging system 10, with the break-through of the high-power battery charging technology, the battery can be charged in a short time. However, in the current practical application, when the charging device 11 performs high-power charging on the power battery, the heat generated by the power battery increases greatly. If the heat cannot be removed in time, the charging device 11 will be affected to perform high-power charging of the power battery.

Electric vehicle 12 is typically provided with a thermal management system that dissipates heat from the power cells. However, with the increase of the charging power, for example, in the super-charging scenario, the heat productivity of the power battery is increased, and the effect of heat dissipation by only relying on the thermal management system is limited, so that the heat dissipation capability of the thermal management system cannot meet the heat dissipation requirement of the power battery during high-power charging.

At present, although the power battery can be cooled through an external cooling system, a connecting port of the external cooling system is only a single liquid inlet and outlet, and when the charging pile charges the power battery, the electric vehicle and the external cooling system cannot identify whether the electric vehicle and the external cooling system are connected with each other or not, so that the normal operation of the charging pile for high-power charging of the power battery can be influenced.

Based on this, this application provides a charging system, and this charging system includes fills electric pile and electric vehicle, fills electric pile and includes charging device and liquid cooling equipment. When the charging device is used for carrying out high-power charging on the power battery of the electric vehicle, the liquid cooling device can be used for conveying cooling liquid to the thermal management system of the power battery, so that the heat dissipation problem during charging of the power battery can be solved, and the charging power of the charging device for the power battery is improved.

Fig. 2 is a schematic structural diagram of a charging system 200 according to an embodiment of the present application. It should be understood that the power transmission lines are shown in fig. 2 by thin solid line connections and the short dashed line connections.

Charging system 200 may include an electric vehicle 300 and a charging stake 400. Wherein, the electric vehicle 300 may include an on-vehicle charging connection device 310 and a power battery 320, and the charging stake 400 may include a charging device 410 and a liquid cooling apparatus 420.

It is to be understood that the electric vehicle 300 may be the electric vehicle 12 shown in fig. 1, and the charging device 410 may be a split charging device shown in fig. 1 (a), or an integrated charging device shown in fig. 1 (b). For convenience of description and understanding, the embodiment of the present application will be described by taking the charging device 410 as an example of a split charging device shown in fig. 1 (a).

It is further understood that the liquid cooling device 420 may be disposed outside the charging device 410 or may be integrated with the charging device 410. For convenience of description and understanding, the embodiment of the present application will be described by taking an example in which the liquid cooling apparatus 420 is disposed outside the charging device 410.

With continued reference to fig. 2, the vehicle charging connection device 310 may include a vehicle end charging interface 311, a dc output interface 312, a first inlet/outlet 313, and a second inlet/outlet 314, the charging device 410 may include a pile end charging interface 411, and the liquid cooling apparatus 420 may include a liquid cooling system 422 and a liquid cooling inlet/outlet 421.

The pile end charging interface 411 may be used to electrically connect with the car end charging interface 311, where the car end charging interface 311 is electrically connected with the power battery 320 through the dc output interface 312, so that the charging device 410 may perform power transmission with the power battery 320 through the vehicle charging connection device 310. For example, the charging device 410 may output a direct current from the terminal charging interface 411, and the vehicle charging connection device 310 transmits the direct current output from the terminal charging interface 411 by the charging device 410 to the power battery 320 through the direct current output interface 312 to charge the power battery 320. Alternatively, the power battery 320 may output dc power to the dc output interface 312, and the vehicle-mounted charging connection device 310 may transmit the dc power output by the power battery 320 to the charging device 410 through the vehicle-end charging interface 311, so as to discharge the power battery 320 to the charging device 410.

In some embodiments, the number of pile end charging interfaces 411 and car end charging interfaces 311 may be one or more, respectively. In particular implementations, as shown in fig. 2, the split charging device 410 may include a charging host 412, at least one charging terminal 413 electrically connected to the charging host 412. Each charging terminal 413 may be electrically connected to a charging gun (not shown in the drawings) through a cable, and the terminal charging interface 411 may be a charging plug provided in each charging gun, and the terminal charging interface 311 may be a charging socket provided on the vehicle charging connection device 310.

The liquid cooling inlet and outlet 421 can be used for being connected with the first inlet and outlet 313, and the first inlet and outlet 313 can be connected with the power battery 320 through the second inlet and outlet 314, so that the liquid cooling device 420 can transmit liquid-phase cooling medium to the power battery 320 through the vehicle-mounted charging connection device 310, so as to realize cooling of the power battery 320.

In a specific implementation, the liquid cooling device 420 may include a liquid cooling system 422, and a liquid cooling gun (not shown in the figure) connected to the liquid cooling device 422, and the liquid cooling inlet 421 may be a liquid cooling connection plug disposed in the liquid cooling gun, and the first inlet 313 may be a liquid cooling connection socket disposed on the vehicle charging connection device 310.

In the embodiment of the application, by providing the separate vehicle-mounted charging connection device 310 in the electric vehicle 300, the vehicle-mounted charging connection device 310 has the vehicle-end charging interface 311 for electrically connecting with the charging device 410 and the first liquid inlet 313 connected with the liquid cooling device 420, so that the power battery 320 can be simultaneously connected with the charging device 410 and the liquid cooling device 420 directly through the vehicle-mounted charging connection device 310. In this way, when the power battery is charged with high power through the charging device 410, the liquid cooling device 420 outside the vehicle can be connected with the power battery 320, so that the heat dissipation requirement of the power battery 320 during high-power charging can be met, the charging power of the power battery 320 can be improved, and the charging duration of the electric vehicle can be reduced.

The present application relates generally to the identification of the connection status of the liquid cooling apparatus 420 and the power battery, and therefore, the solution of the present application will be described hereinafter by taking the liquid cooling apparatus and the electric vehicle alone as examples.

Fig. 3 is a schematic diagram of a heat dissipation system according to an embodiment of the present application. Referring to fig. 3, the heat dissipation system includes an electric vehicle 300 and a liquid cooling apparatus 420. The liquid cooling interface in fig. 3 includes the liquid cooling inlet 421 and the first inlet 313 in fig. 2. The liquid cooled plug may include a liquid cooled inlet 412 and the liquid cooled receptacle includes a first inlet 312. In addition, the liquid-cooled plug may further include a connection confirmation port and a connection confirmation circuit connected to the connection confirmation port, and the liquid-cooled socket may further include a connection confirmation port and a connection confirmation circuit connected to the connection confirmation port.

In one embodiment, the connection confirmation circuit in the liquid cooling device may be connected to the liquid cooling controller 423, and the liquid cooling controller 423 determines the connection state of the liquid cooling plug and the liquid cooling socket through the connection confirmation circuit in the liquid cooling device. The connection confirmation circuit in the electric vehicle may be connected to the in-vehicle controller 330, and the in-vehicle controller 330 determines the connection state of the liquid-cooled receptacle and the liquid-cooled plug by the connection confirmation circuit in the electric vehicle.

Hereinafter, an example will be described of the in-vehicle charging connection device, the electric vehicle, the liquid cooling apparatus, the charging pile, and the control guide circuit, respectively.

First, the application provides a vehicle-mounted charging connection device, and vehicle-mounted charging connection device is applied to electric vehicle, and vehicle-mounted charging connection device includes first vehicle socket and liquid cooling connection confirmation circuit, and first vehicle socket includes liquid cooling socket and liquid cooling connection confirmation socket.

One end of the liquid cooling socket is used for being connected with a liquid cooling plug of the liquid cooling gun, the other end of the liquid cooling socket is connected with a thermal management system of the power battery through a liquid cooling pipeline, and the liquid cooling socket is used for receiving cooling liquid output by the liquid cooling plug or is used for outputting the cooling liquid to the liquid cooling plug. One end of the liquid cooling connection confirmation socket is used for being connected with a liquid cooling connection confirmation plug of the liquid cooling gun, and the other end of the liquid cooling connection confirmation socket is connected with a liquid cooling connection confirmation circuit.

The vehicle-mounted charging connection device is used for judging the connection state of the liquid cooling socket and the liquid cooling plug through the liquid cooling connection confirmation circuit.

In this embodiment of the application, the liquid cooling socket can include the inlet, including inlet and liquid outlet promptly, and the inlet of liquid cooling socket is connected with the liquid outlet of liquid cooling plug, and the liquid outlet of liquid cooling socket is connected with the liquid return mouth of liquid cooling plug. Therefore, the cooling medium of the liquid cooling device is input into the thermal management system of the power battery through the liquid cooling plug and the liquid cooling socket, and the power battery is cooled.

In the prior art, a connection port of a cooling system under a vehicle is only a single liquid inlet and outlet, and under the condition that a charging pile charges a power battery of an electric vehicle, the electric vehicle and the cooling system under the vehicle cannot mutually identify whether to connect or not, so that the normal operation of the charging pile for carrying out high-power charging on the power battery can be influenced. The liquid cooling socket in this embodiment includes except including the inlet and outlet, still includes liquid cooling connection confirmation socket, because liquid cooling connection confirmation socket is connected with liquid cooling connection confirmation circuit, consequently, on-vehicle charging connection device can judge the connected state of liquid cooling socket and liquid cooling plug according to liquid cooling connection confirmation circuit to under the condition that liquid cooling socket and liquid cooling plug are connected successfully, when charging device charges power battery with high-power, liquid cooling equipment is through injecting cooling medium to power battery's thermal management system in order to realize cooling power battery.

In one embodiment, when the liquid cooling plug is connected to the liquid cooling socket and the dc plug is connected to the dc plug, the liquid cooling connection confirmation circuit in the vehicle-mounted charging connection device forms a current loop with the liquid cooling connection confirmation circuit through the liquid cooling connection confirmation socket and the liquid cooling connection confirmation plug.

The vehicle-mounted charging connection device is used for detecting the voltage of a detection point in the liquid cooling connection confirmation circuit and judging the connection state of the liquid cooling socket and the liquid cooling plug. And responding to the voltage of the detection point in the liquid cooling connection confirmation circuit reaching a preset value at the vehicle end, wherein the vehicle-mounted charging connection device is used for judging that the liquid cooling socket and the liquid cooling plug are successfully connected.

In this embodiment, when the liquid cooling socket is connected to the liquid cooling plug, the liquid cooling connection confirmation circuit forms a current loop with the liquid cooling connection confirmation circuit of the liquid cooling device through the liquid cooling connection confirmation socket and the liquid cooling connection confirmation plug. The detection point can be arranged in the current loop, and when the voltage of the detection point reaches a preset value of a vehicle end, the vehicle-mounted charging connection device judges that the liquid cooling socket and the liquid cooling plug are successfully connected.

Through this kind of design, on-vehicle charge connecting device can judge the connected state of liquid cooling socket and liquid cooling plug according to the voltage of check point to under the condition that liquid cooling socket and liquid cooling plug are connected successfully, when charging the stake with high-power to power battery, the liquid cooling system can realize the cooling to power battery through injecting into coolant to power battery, thereby can satisfy the heat dissipation demand of power battery when high-power charging, be favorable to improving power battery's charge power, reduce electric vehicle's charge duration.

The preset vehicle end value in the embodiment of the present application relates to a specific circuit form of the liquid cooling connection confirmation circuit and a position of the detection point, and please refer to the following description about fig. 4 to 7.

The specific circuit form of the liquid cooling connection confirmation circuit and the strategy of the vehicle-mounted charging connection device for judging the connection state of the liquid cooling socket and the liquid cooling plug will be described below with reference to the accompanying drawings.

In one embodiment, the liquid-cooled connection confirmation receptacle includes a first liquid-cooled connection confirmation receptacle, and the liquid-cooled connection confirmation circuit includes a first liquid-cooled connection confirmation circuit, the first liquid-cooled connection confirmation receptacle being connected to the first liquid-cooled connection confirmation circuit.

The first liquid-cooling connection confirmation circuit comprises a first resistance unit, and the first liquid-cooling connection confirmation socket is connected with a voltage source through the first resistance unit.

Responding to the voltage of the detection point in the liquid cooling connection confirmation circuit reaching a first vehicle end preset value, the vehicle-mounted charging connection device is used for judging that the liquid cooling socket and the liquid cooling plug are successfully connected, and the vehicle-mounted charging connection device comprises: and responding to the voltage of the detection point between the first resistance unit and the first liquid cooling connection confirmation socket reaching a first vehicle end preset value, wherein the vehicle-mounted charging connection device is used for judging that the liquid cooling socket is successfully connected with the liquid cooling plug.

Fig. 4 is a schematic diagram of a heat dissipation system according to an embodiment of the present application. The first resistor unit comprises a resistor R5, the first liquid cooling connection confirmation socket is a socket corresponding to the CC2 port, and the voltage source is U2. The detection point between the first resistor unit and the first liquid cooling connection confirmation socket is the detection point 2.

Before the liquid cooling socket is not connected with the liquid cooling plug, since the detection point 2 is connected with the voltage source U2, the voltage of the detection point 2 should be the voltage output by the voltage source U2. Only when the liquid cooling socket is connected with the liquid cooling plug, the voltage source U2 forms a loop through the resistor R5 in the electric vehicle, the resistor R3 in the charging pile and the grounding wire in the charging pile, and the voltage of the detection point 2 can reach the first vehicle end preset value due to the voltage dividing function of the resistor.

For example, the voltage output by the voltage source U2 is set to 12V, and the resistances of R3 and R5 are equal, and then the first vehicle end preset value is set to 6V. Under this design, if the voltage of the detection point 2 is 6V, the vehicle-mounted charging connection device recognizes that the liquid cooling socket and the liquid cooling plug are in a connection state.

For another example, the voltage output by the voltage source U2 is still set to be 12V, but the resistances of R3 and R5 are different, if R3 is 2Ω and R5 is 4Ω, the first vehicle end preset value is 4V. Under this design, if the voltage of the detection point 2 is 4V, the vehicle-mounted charging connection device recognizes that the liquid cooling socket and the liquid cooling plug are in a connection state.

Therefore, based on the above analysis, in the case where the voltage at the detection point 2 is the voltage output from the voltage source U2, the in-vehicle charging connection device can recognize that the liquid cooling outlet is not connected to the liquid cooling plug. When the voltage of the detection point 2 reaches the preset value of the first vehicle end, the vehicle-mounted charging connection device can identify that the liquid cooling socket is connected with the liquid cooling plug.

In this embodiment of the present application, since the detection point set in the present application is connected to the voltage source in the electric vehicle, when the voltage at the detection point is the voltage output by the voltage source, the vehicle-mounted charging connection device identifies that the liquid cooling socket is not connected to the liquid cooling plug. And under the condition that the voltage of the detection point reaches a first vehicle end preset value, the vehicle-mounted charging connection device identifies that the liquid cooling socket is connected with the liquid cooling plug. The connection state of the liquid cooling socket and the liquid cooling plug is identified according to the voltage of the detection point, so that the accuracy of the vehicle-mounted charging connection device in identifying the connection state of the liquid cooling socket and the liquid cooling plug can be improved, the heat dissipation requirement of the power battery during high-power charging can be met, the charging power of the power battery can be improved, and the charging duration of the electric vehicle can be reduced.

The above embodiment illustrates that the vehicle-mounted charging connection device determines that the liquid cooling socket and the liquid cooling plug are in the connection state when the voltage at the detection point 2 reaches the first vehicle-end preset value. In addition, the vehicle-mounted charging connection device can also judge the connection state of the first resistance unit and the voltage source according to the specific voltage value of the detection point 2.

For example, if the internal contact of the electric vehicle is good, because the detection point 2 is located between the resistor R5 and the resistor R3, and the voltage of the detection point 2 should be greater than 0 and less than the voltage source output voltage (i.e. the first vehicle end preset value) due to the voltage dividing function of the resistor. For example, if the voltage output by the voltage source is 12V and the resistances of R5 and R3 are equal, the voltage at the detection point 2 is 6V.

If the electric vehicle has poor contact, for example, R5 is not connected to the voltage source U2, and is in a suspended state, which corresponds to R5 and R3 being directly connected to the ground line in the liquid cooling apparatus. For any detection point on the branch of R5, R3 and the ground line, the voltage is 0V. Since the detection point 2 is located on the branch formed by the resistor R5, the resistor R3 and the ground line, the voltage at the detection point 2 is 0V.

Therefore, the vehicle-mounted charging connection device can further judge the connection state of the interior of the electric vehicle according to the voltage of the detection point 2, which is beneficial to improving the safety of the electric vehicle.

In one embodiment, the vehicle socket further comprises a grounding socket, one end of the grounding socket is used for being connected with a grounding plug of the liquid cooling gun, and the other end of the grounding socket is connected with the vehicle body grounding platform.

The liquid-cooling connection confirmation socket further includes a second liquid-cooling connection confirmation socket, and the liquid-cooling connection confirmation circuit further includes a second liquid-cooling connection confirmation circuit, the second liquid-cooling connection confirmation socket being connected to the second liquid-cooling connection confirmation circuit.

The second liquid cooling connection confirmation circuit comprises a second resistance unit, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform through the second resistance unit.

In one embodiment, in response to the voltage at the detection point in the liquid cooling connection confirmation circuit reaching a first vehicle end preset value, the vehicle-mounted charging connection device is configured to determine that the liquid cooling socket and the liquid cooling plug are successfully connected, and includes: the vehicle-mounted charging connection device is used for judging that the liquid cooling socket and the liquid cooling plug are successfully connected in response to the voltage of a detection point between the first resistance unit and the first liquid cooling connection confirmation socket reaching a first vehicle-end preset value and the voltage of a detection point between the second resistance unit and the second liquid cooling connection confirmation socket reaching a second vehicle-end preset value.

Fig. 5 is a schematic diagram of another heat dissipation system according to an embodiment of the present application. The second resistor unit comprises a resistor R4, and the second liquid cooling connection confirms that the socket is a socket corresponding to the CC1 port. The detection point between the second resistance unit and the second liquid cooling connection confirmation socket is a detection point 3.

Before the liquid cooling plug is not connected with the liquid cooling plug, the voltage of the detection point 3 should be 0V because the detection point 3 is connected with the vehicle level platform. Only when the liquid cooling socket is connected with the liquid cooling plug, the voltage source U1 in the charging pile passes through the resistor R1, the resistor R4 in the electric vehicle and forms a loop, and the voltage of the detection point 3 can reach the second vehicle end preset value due to the voltage dividing function of the resistor.

For example, the voltage output by the voltage source U1 is set to 12V, and the resistances of R1 and R4 are equal, and the second preset value is set to 6V. Under this design, if the voltage of the detection point 3 is 6V, the vehicle-mounted charging connection device recognizes that the liquid cooling socket and the liquid cooling plug are in a connection state.

For another example, the voltage output by the voltage source U1 is still set to be 12V, but the resistances of R1 and R4 are different, if R1 is 2Ω and R4 is 4Ω, the second preset value is 8V. Under this design, if the voltage at the detection point 3 is 8V, the vehicle-mounted charging connection device recognizes that the liquid cooling socket and the liquid cooling plug are in a connection state.

Therefore, based on the above analysis, in the case where the voltage at the detection point 2 is the voltage output by the voltage source U2 and the voltage at the detection point 3 is 0V, the in-vehicle charging connection device can recognize that the liquid cooling outlet is not connected to the liquid cooling plug. When the voltage of the detection point 2 reaches a first vehicle end preset value and the voltage of the detection point 3 reaches a second vehicle end preset value, the vehicle-mounted charging connection device can identify that the liquid cooling socket and the liquid cooling plug are successfully connected.

Fig. 6 is a schematic diagram of another heat dissipation system according to an embodiment of the present application. The first resistor unit comprises R5 and a switch SV, the first liquid cooling connection confirmation socket is still a socket corresponding to the CC2 port, and a detection point between the first resistor unit and the first liquid cooling connection confirmation socket is a detection point 2. The second resistance unit comprises R4, R4 'and switches S2 and S2', the second liquid cooling connection confirmation socket is a socket corresponding to the CC1 port, and a detection point between the second resistance unit and the second liquid cooling connection confirmation socket is a detection point 3. The specific identification process is similar to that of fig. 5, and for brevity, description is omitted.

In this embodiment of the application, through the connection state of the liquid cooling socket and the liquid cooling plug according to the voltage identification liquid cooling socket of two detection points, the rate of accuracy of the connection state of the liquid cooling socket and the liquid cooling plug of the vehicle-mounted charging connection device identification can be further improved to the heat dissipation demand of the power battery when high-power charging can be satisfied, the charging power of the power battery can be improved, and the charging duration of the electric vehicle can be reduced.

In some embodiments, the vehicle-mounted charging connection device may determine the connection state of the liquid cooling socket and the liquid cooling plug only according to the voltage of the detection point 3, and the specific determination process is described in the above embodiments, which is not repeated here.

Based on this, the above description has been given of various embodiments of the in-vehicle charging connection device for judging the connection state of the liquid cooling socket and the liquid cooling plug from the point of view of the in-vehicle charging connection device, and the following description will be given from the point of view of the liquid cooling apparatus.

The application provides a liquid cooling equipment, liquid cooling equipment include liquid cooling rifle plug, liquid cooling connection validation circuit and liquid cooling system, and liquid cooling rifle plug includes liquid cooling plug and liquid cooling connection validation plug, and the one end of liquid cooling plug is used for connecting electric vehicle's liquid cooling socket, and liquid cooling system is connected to the other end of liquid cooling plug.

One end of the liquid cooling connection confirmation plug is used for being connected with a liquid cooling connection confirmation socket of the electric vehicle, and the other end of the liquid cooling connection confirmation plug is connected with a liquid cooling connection confirmation circuit.

The liquid cooling device is used for judging the connection state of the liquid cooling plug and the liquid cooling socket through the liquid cooling connection confirming circuit.

In this embodiment of the application, the liquid cooling equipment can be integrated as an organic whole with charging device, and the liquid cooling equipment also can be with charging device split type design, does not limit.

The liquid cooling equipment in this application embodiment includes liquid cooling rifle plug, and this liquid cooling rifle plug includes liquid cooling plug and liquid cooling connection confirmation plug, and when liquid cooling plug and electric vehicle's liquid cooling socket were connected successfully, the cooling medium in the liquid cooling equipment can get into electric vehicle through the liquid cooling plug, realizes the cooling to power battery.

In the prior art, a connection port of a cooling system under a vehicle is only a single liquid inlet and outlet, and under the condition that a charging pile charges a power battery of an electric vehicle, the electric vehicle and the cooling system under the vehicle cannot mutually identify whether to connect or not, so that the normal operation of the charging pile for carrying out high-power charging on the power battery can be influenced. The liquid cooling plug in this embodiment includes except including the inlet and outlet, still includes liquid cooling connection confirmation plug, because liquid cooling connection confirmation plug is connected with liquid cooling connection confirmation circuit, consequently, liquid cooling equipment can judge the connected state of liquid cooling plug and liquid cooling socket in the confirmation circuit according to liquid cooling connection to under the condition that liquid cooling socket and liquid cooling plug are connected successfully, when charging device charges power battery with high-power, liquid cooling equipment is through injecting cooling medium to power battery in order to realize the cooling to power battery.

In one embodiment, when the liquid cooling plug is connected to the liquid cooling socket, the liquid cooling connection confirmation circuit forms a current loop with the liquid cooling connection confirmation circuit of the electric vehicle through the liquid cooling connection confirmation plug and the liquid cooling connection confirmation socket, and the liquid cooling device is used for detecting a voltage of a detection point in the liquid cooling connection confirmation circuit to determine a connection state of the liquid cooling plug and the liquid cooling socket.

And responding to the voltage of the detection point reaching a pile end preset value, and judging that the liquid cooling plug is successfully connected with the liquid cooling socket by the liquid cooling equipment.

In this embodiment of the application, under the condition that the liquid cooling plug is connected successfully with the liquid cooling socket, the connection confirmation circuit forms a current loop through the connection confirmation socket and the connection confirmation circuit of the connection confirmation plug and the charging pile. And a detection point can be arranged in the current loop, and when the voltage of the detection point reaches a preset value of the pile end, the liquid cooling equipment judges that the liquid cooling plug is successfully connected with the liquid cooling socket.

Through this kind of design, the liquid cooling equipment can judge the connected state of liquid cooling socket and liquid cooling plug according to the voltage of check point to under the condition that liquid cooling socket and liquid cooling plug are connected successfully, when charging the stake with high-power to power battery, the liquid cooling equipment can realize the cooling to power battery through injecting into coolant to power battery, thereby can satisfy the heat dissipation demand of power battery when high-power charging, be favorable to improving power battery's charge power, reduce electric vehicle's charge duration.

The preset value of the stub in the embodiment of the present application relates to a specific circuit form of the connection confirmation circuit and a position of the detection point, and please refer to the following descriptions about fig. 4 to 6.

The specific circuit form of the liquid-cooling connection confirmation circuit and the strategy of the liquid-cooling device for judging the connection state of the liquid-cooling socket and the liquid-cooling plug will be described below with reference to the accompanying drawings.

In one embodiment, the liquid-cooled connection confirmation plug includes a first liquid-cooled connection confirmation plug and a second liquid-cooled connection confirmation plug, the liquid-cooled connection confirmation circuit includes a third resistor unit, and the second liquid-cooled connection confirmation plug is connected to the voltage source through the third resistor unit.

In one embodiment, the liquid cooling device is configured to determine a connection state of the liquid cooling plug and the liquid cooling socket according to a voltage at a detection point between the third resistance unit and the second liquid cooling connection confirmation plug.

And responding to the voltage of the detection point between the third resistance unit and the second liquid cooling connection confirmation plug reaching the preset pile end value, wherein the liquid cooling equipment is used for judging that the liquid cooling plug is successfully connected with the liquid cooling socket.

Referring to fig. 4, in the embodiment of the present application, the third resistor unit is R1, the voltage source is still U1, and the detection point 1 is the detection between the third resistor unit and the second liquid cooling connection confirmation plug. Before the liquid cooling socket is not connected with the liquid cooling plug, since the detection point 1 is connected with the voltage source U1, the voltage of the detection point 1 should be the voltage output by the voltage source U1. Only when the liquid cooling plug is connected with the liquid cooling socket, the current of the voltage source U1 forms a loop through the resistor R1 in the direct current equipment, the resistor R4 in the electric vehicle and the grounding wire in the electric vehicle. Since the detection point 1 is located between the resistor R1 and the resistor R4, the voltage at the detection point 1 reaches the preset value of the stub due to the voltage dividing function of the resistor.

For example, the voltage output by the voltage source U1 is set to 12V, and the resistances of R1 and R4 are equal, and then the pile tip preset value is set to 6V. Under this design, if the voltage at the detection point 1 is 6V, the liquid cooling device recognizes that the liquid cooling socket and the liquid cooling plug are in a connected state.

For another example, the voltage output by the voltage source U1 is still set to be 12V, but the resistance values of R1 and R4 are different, if R1 is 2Ω and R4 is 4Ω, the pile tip preset value is 8V. With this design, if the voltage at the detection point 1 is 8V, the liquid cooling device recognizes that the liquid cooling socket and the liquid cooling plug are in a connected state.

Based on the above analysis, when the voltage at the detection point 1 is the voltage output by the voltage source U1, the liquid cooling device can identify that the liquid cooling socket is not connected to the liquid cooling plug. When the voltage of the detection point 1 is the preset value of the pile end, the liquid cooling equipment can identify that the liquid cooling socket and the liquid cooling plug are successfully connected.

The third resistor unit shown in fig. 5 is similar to that of fig. 4, and the specific identification process is similar to that of fig. 4, and will not be repeated.

With continued reference to fig. 6, the fourth resistor unit in the embodiment of the present application includes R1, R1', a switch S1, and a switch S0, the voltage source is still U1, and the detection point between the third resistor unit and the second connection confirmation plug is still the detection point 1. The specific identification process is similar to that of fig. 4, and for brevity, description is omitted.

In this embodiment of the present application, since the detection point set in the present application is connected to the voltage source in the liquid cooling device, when the voltage at the detection point is the voltage output by the voltage source, the liquid cooling device recognizes that the liquid cooling socket is not connected to the liquid cooling plug. And under the condition that the voltage of the detection point reaches the preset value of the pile end, the liquid cooling equipment identifies that the liquid cooling socket is successfully connected with the liquid cooling plug. The liquid cooling device can be used for realizing the cooling of the power battery by injecting a cooling medium into the power battery when the charging device charges the power battery with high power, so that the heat dissipation requirement of the power battery during high-power charging can be met, the charging power of the power battery can be improved, and the charging duration of an electric vehicle can be reduced.

In one embodiment, the liquid-cooled connection confirmation circuit further includes a normally closed switch, the normally closed switch being located between the third resistance unit and the second liquid-cooled connection confirmation plug.

The liquid cooling equipment is used for judging the connection state of the liquid cooling plug and the liquid cooling socket according to the voltage of the detection point between the third resistance unit and the second liquid cooling connection confirmation plug, and comprises: and responding to the voltage of the detection point between the third resistance unit and the normally closed switch reaching a pile end preset value, and the voltage of the detection point between the normally closed switch and the second liquid cooling connection confirmation plug reaching the pile end preset value, wherein the liquid cooling equipment is used for judging that the liquid cooling plug is successfully connected with the liquid cooling socket.

Referring to fig. 5, in the embodiment of the present application, the third resistor unit is R1, the normally closed switch is S, the voltage source is still U1, the detection point between the third resistor unit and the normally closed switch is the detection point 1, and the detection point between the normally closed switch and the second liquid cooling connection confirmation plug is the detection point 4.

Before the liquid cooling socket is not connected with the liquid cooling plug, because the detection point 1 is connected with the voltage source U1 and the switch S is a normally closed switch, the voltage of the detection point 1 and the voltage of the detection point 4 are both voltages output by the voltage source U1. Only when the liquid cooling plug is connected with the liquid cooling socket, the current of the voltage source U1 forms a loop through the resistor R1 in the direct current equipment, the resistor R4 in the electric vehicle and the grounding wire in the electric vehicle. Since the detection point 1 is located between the resistor R1 and the resistor R4, the voltage at the detection point 1 and the voltage at the detection point 4 reach the preset value of the pile tip due to the voltage dividing function of the resistor. In another possible case, the liquid cooling socket is connected to the liquid cooling plug, but the switch S is in an off state, and at this time, the detection point 1 is connected to the voltage source U1, and the detection point 4 is connected to the ground line in the electric vehicle, so that the voltage at the detection point 1 is the voltage output by the voltage source U1, and the voltage at the detection point 4 is 0V.

For example, the voltage output by the voltage source U1 is set to 12V, and the resistances of R1 and R4 are equal, and then the pile tip preset value is set to 6V. Under this design, if the voltage of the detection point 1 is 6V, the liquid cooling device recognizes that the liquid cooling socket and the liquid cooling plug are successfully connected. If the voltage at the detection point 1 is 12V and the voltage at the detection point 4 is 0V, it is indicated that the liquid cooling socket and the liquid cooling plug are in a connected state but the switch S is turned off.

For another example, the voltage output by the voltage source U1 is still set to be 12V, but the resistance values of R1 and R4 are different, if R1 is 2Ω and R4 is 4Ω, the pile tip preset value is 8V. With this design, if the voltage at the detection point 1 is 8V, the liquid cooling device recognizes that the liquid cooling socket and the liquid cooling plug are in a connected state. If the voltage at the detection point 1 is 12V and the voltage at the detection point 4 is 0V, it is indicated that the liquid cooling socket and the liquid cooling plug are in a connected state but the switch S is turned off.

Based on the above analysis, when the voltages at the detection point 1 and the detection point 4 are the voltages output by the voltage source U1, the liquid cooling device can recognize that the liquid cooling socket is not connected to the liquid cooling plug. When the voltages of the detection point 1 and the detection point 4 are the preset value of the pile end, the liquid cooling equipment can identify that the liquid cooling socket and the liquid cooling plug are successfully connected. The voltage at the detection point 1 is the voltage output by the voltage source U1 and the voltage at the detection point 4 is 0V, and the liquid cooling device recognizes that the liquid cooling socket is connected with the liquid cooling plug but the switch S is in an off state.

In this embodiment of the application, through the connected state according to the voltage discernment liquid cooling socket and the liquid cooling plug of two check points, can further improve the rate of accuracy of the connected state of liquid cooling equipment discernment liquid cooling socket and liquid cooling plug, when charging device charges power battery with high-power, liquid cooling equipment is through injecting cooling medium into power battery in order to realize the cooling to power battery to can satisfy the heat dissipation demand of power battery when high-power charging, be favorable to improving power battery's charge power, reduce electric vehicle's charge duration.

The connection state of the liquid cooling plug and the liquid cooling socket is judged by the vehicle-mounted charging connection device and the liquid cooling equipment, and the connection state of the direct current socket and the direct current plug can be judged by the vehicle-mounted charging connection device besides the connection state of the liquid cooling socket and the liquid cooling plug.

In one embodiment, the in-vehicle charging connection device further comprises a charging connection confirmation circuit and a second vehicle outlet, the second vehicle outlet comprising a dc outlet and a charging connection confirmation outlet; one end of the direct current socket is used for being connected with a direct current plug of the charging gun, and the other end of the direct current socket is connected with a power battery. One end of the charging connection confirmation socket is used for being connected with a connection confirmation plug of the charging gun, and the other end of the charging connection confirmation socket is connected with a charging connection confirmation circuit.

The vehicle-mounted charging connection device is used for judging the connection state of the direct-current socket and the direct-current plug through the charging connection confirmation circuit.

For the judgment of the connection state of the dc outlet and the dc plug, reference may be made to the relevant standard contents. The connection state of the dc plug and the dc socket will be determined by the vehicle-mounted charging connection device and the charging post in the following description with reference to fig. 7.

Referring to fig. 7, the in-vehicle charging connection device may determine the connection state of the dc plug and the dc socket by detecting the voltage of the point 2. The charging pile can judge the connection state of the direct current plug and the direct current socket through the voltage of the detection point 1.

Before the direct current socket is not connected with the direct current plug, as the detection point 2 is connected with the voltage source U2 and the detection point 1 is connected with the voltage source U1, the voltage of the detection point 2 should be the voltage output by the voltage source U2, and the voltage of the detection point 1 is the voltage output by the voltage source U1. Only when the dc socket is connected to the dc plug, the voltage source U2 forms a loop through the resistor R5 in the electric vehicle, the resistor R3 in the charging pile, and the ground line in the charging pile, the voltage source U1 forms a loop through R1, R4 and the ground line in the electric vehicle, and the voltage at the detection point 2 is a preset value between 0 and U2 only because of the voltage dividing function of the resistor, and the voltage at the detection point 1 is a preset value between 0 and U1 only.

For example, the voltage output by the voltage source U1 and the voltage source U2 are set to be 12V, the resistance values of R1 and R4 are equal, and the resistance values of R3 and R5 are equal. If the voltage of the detection point 1 is 6V, the charging pile identifies that the direct current socket and the direct current plug are successfully connected.

It should be understood that the values shown in the above embodiments are merely exemplary, and reference may be made to the relevant standards for specific voltage sources and resistance values.

In one embodiment, the second vehicle outlet further comprises an auxiliary power outlet, one end of the auxiliary power outlet is used for being connected with an auxiliary power plug of the charging gun, and the other end of the auxiliary power outlet is used for receiving direct current. The second vehicle socket further comprises a second communication socket, one end of the second communication socket is used for being connected with a communication plug of the charging gun, and the other end of the second communication socket is connected with the controller.

In this embodiment, the auxiliary power outlet in the second vehicle outlet may be the outlet corresponding to a+ and a-in fig. 7. The second communication socket is the socket corresponding to the S+ and S-in the above figure 7, and the charging pile and the electric vehicle can transmit messages through the second communication socket and the second communication plug. For specific description, reference may be made to the relevant content of the charging standard for A+, A-and S+, S-, and no further description will be given.

In one embodiment, the on-board charging connection device is for: under the condition that the liquid cooling socket is successfully connected with the liquid cooling plug and the direct current socket is successfully connected with the direct current plug, a message for requesting the charging pile to output the first charging power is sent to the charging pile; or under the condition that the direct current socket and the direct current plug are successfully connected, sending a message for requesting the charging pile to output the second charging power to the charging pile, wherein the second charging power is smaller than the first charging power.

In this embodiment, the liquid cooling plug is connected successfully with the liquid cooling plug, and under the condition that direct current socket is connected successfully with the direct current plug, it has been explained that electric vehicle has had the condition of super charging, when power battery was charged with high-power, the liquid cooling equipment under the car can pass through liquid cooling plug and to power battery's thermal management system transmission cooling medium, consequently, on-vehicle charging connecting device can be to charging the stake and send the message that is used for requesting to charge stake output first charge power, this first charge power can be greater than the power of a certain threshold value. Therefore, when the charging pile charges the power battery with the first charging power, the liquid cooling device is used for injecting a cooling medium into the power battery to cool the power battery, so that the heat dissipation requirement of the power battery in high-power charging can be met, the charging power of the power battery can be improved, and the charging duration of the electric vehicle can be reduced.

Under the condition that the direct current socket and the direct current plug are successfully connected, the fact that the electric vehicle does not have the condition of overcharging is indicated, namely if the power battery is charged with high power, the liquid cooling equipment under the vehicle cannot transmit cooling medium to the power battery, so that the vehicle-mounted charging connection device can send a message for requesting the charging pile to output second charging power to the charging pile, and the second charging power can be smaller than a certain threshold value. Therefore, when the charging pile charges the power battery with the second charging power, the power battery can be cooled by the thermal management system on the vehicle because the second charging power is smaller than a certain threshold value, and the power battery is not required to be cooled by liquid cooling equipment under the vehicle.

Based on this, the connection confirmation circuit and the judgment of the connection state of the direct-current socket and the direct-current plug and the connection state of the liquid-cooled socket and the liquid-cooled plug based on the connection confirmation circuit are described above. The sequence of the coupling of the contacts during the connection of the plug and socket of the liquid cooling gun will be described below.

In one embodiment, the first vehicle outlet includes a plug end for plugging with the charging gun, and the liquid cooling connection confirms that the distance from the outlet to the plug end of the liquid cooling outlet is greater than or equal to the distance from the inlet to the plug end of the liquid cooling outlet. The liquid cooling plug comprises a plug end, the plug end is used for being plugged with a vehicle socket, and the distance from the liquid cooling connection confirmation plug to the plug end is larger than the distance from a liquid inlet and a liquid outlet of the liquid cooling plug to the plug end.

In this embodiment of the application, the distance from the liquid cooling connection confirmation socket to the plug end is greater than or equal to the distance from the liquid inlet and outlet of the liquid cooling socket to the plug end. The distance from the liquid cooling connection confirmation socket to the plug end is larger than the distance from the liquid inlet to the liquid outlet of the liquid cooling socket to the plug end, in this case, the contact corresponding to the liquid inlet of the liquid cooling socket is coupled with the contact corresponding to the liquid inlet of the liquid cooling plug, and the contact of the liquid cooling connection confirmation socket is coupled with the contact of the liquid cooling connection confirmation plug. In other words, the coupling of the contact of the liquid-cooling connection confirmation socket and the contact of the liquid-cooling connection confirmation plug is later than the coupling of the contact of the liquid inlet and outlet of the liquid-cooling socket and the contact of the liquid inlet and outlet of the liquid-cooling plug.

Fig. 8 is a schematic diagram of a liquid injection interface according to an embodiment of the present application. Wherein, the plug end is the dotted line between the liquid cooling plug and the liquid cooling socket shown in the figure. PE is a grounding port, CC1 and CC2 are ports for indicating liquid cooling connection confirmation, S+ and S-are communication ports, and I, O are a liquid inlet and a liquid outlet respectively.

In this embodiment of the present application, the distance from the liquid cooling connection confirmation plug to the plugging end includes two distances, which are d1 and d2 respectively, and the distance from the liquid inlet and outlet of the liquid cooling plug to the plugging end is d0, and d1> d0, and d2> d0. The distance from the liquid cooling connection confirmation socket to the plug end comprises two distances d1', d2', the distance from the liquid inlet and outlet of the liquid cooling socket to the plug end is d0', and d1' > d0', d2' > d0'. Based on this kind of design, at the in-process that liquid cooling socket and liquid cooling plug are connected, the business turn over liquid mouth of liquid cooling socket is connected with the business turn over liquid mouth of liquid cooling plug earlier, then liquid cooling connection confirms that the socket is connected with liquid cooling connection confirms plug (namely CC1, CC 2), is favorable to realizing charging pile with high-power when charging to electric vehicle, and the liquid cooling equipment under the car cools off power battery. This is because if the liquid-cooling connection confirmation socket is connected to the liquid-cooling connection confirmation plug first, the liquid inlet and outlet of the liquid-cooling socket are connected to the liquid inlet and outlet of the liquid-cooling plug, and then the CC1 port and the CC2 port may be turned on, but the liquid inlet and outlet of the liquid-cooling socket is not turned on to the liquid inlet and outlet of the liquid-cooling plug, which may cause a wrong connection confirmation of the liquid inlet and outlet, and may cause leakage. Therefore, in this application implementation, design liquid cooling connection confirms the socket to the plug end the distance be greater than or equal to the business turn over liquid mouth of liquid cooling socket to the distance of plug end and liquid cooling connection confirms the plug to the distance of plug end be greater than the business turn over liquid mouth of liquid cooling plug to the distance of plug end, can avoid appearing the condition of weeping.

In one embodiment, the distance from the first liquid-cooled connection confirmation socket to the plug end is greater than or equal to the distance from the second liquid-cooled connection confirmation socket to the plug end. The distance from the first liquid cooling connection confirmation plug to the plug end is larger than or equal to the distance from the second liquid cooling connection confirmation plug to the plug end.

In this embodiment, the electric vehicle determines the connection state of the liquid cooling socket and the liquid cooling plug based on the first liquid cooling connection confirmation socket and the first liquid cooling connection confirmation plug. The liquid cooling device judges the connection state of the liquid cooling socket and the liquid cooling plug based on the second liquid cooling connection confirmation socket and the second liquid cooling connection confirmation plug.

According to the embodiment of the application, the distance from the first liquid cooling connection confirmation socket to the plug end is larger than or equal to the distance from the second liquid cooling connection confirmation socket to the plug end, and the distance from the first liquid cooling connection confirmation plug to the plug end is larger than or equal to the distance from the second liquid cooling connection confirmation plug to the plug end. This corresponds to the final complete connection confirmation by the electric vehicle or the final complete connection confirmation by both the electric vehicle and the liquid cooling device.

The final complete connection confirmation by the electric vehicle is taken as an example below. Referring to fig. 8, the distance from the first liquid-cooled connection confirmation plug to the plug-in end is d2, and the distance from the first liquid-cooled connection confirmation socket to the plug-in end is d2'. The distance from the second liquid cooling connection confirmation plug to the plug-in end is d1, the distance from the second connection confirmation socket to the plug-in end is d1', and d2 is larger than d1 and d2' is larger than d1'. Based on the design, in the process of connecting the liquid cooling socket and the liquid cooling plug, the contact of the second connection confirmation socket is connected with the contact (namely CC 1) of the second connection confirmation plug first, and the contact of the first connection confirmation socket is connected with the contact (namely CC 2) of the first connection confirmation plug later, which is equivalent to the final complete connection confirmation by the electric vehicle, so that the vehicle-mounted charging connection device of the electric vehicle is beneficial to judging the connection state of the liquid cooling socket and the liquid cooling plug, and further, the confirmation efficiency can be improved. This is because the vehicle-mounted charging connection device needs to send a message requesting charging power to the charging pile, the magnitude of the charging power is determined by the vehicle-mounted charging connection device, the vehicle-mounted charging connection device can send a message requesting higher power to the charging pile when the liquid cooling socket is connected with the liquid cooling plug, and the vehicle-mounted charging connection device can send a message requesting lower power to the charging pile when the liquid cooling socket is not connected with the liquid cooling plug. If the final complete connection confirmation is carried out by the liquid cooling equipment, the liquid cooling equipment also needs to send a message that the liquid cooling socket and the liquid cooling plug are successfully connected to the electric vehicle, and under the condition, the liquid cooling equipment can send the message only after the communication socket and the communication plug are successfully connected, so that the time delay is increased, and the efficiency is reduced. Therefore, in the embodiment of the application, the electric vehicle is designed to carry out final complete connection confirmation, so that the efficiency of judging the connection state of the liquid cooling socket and the liquid cooling plug can be improved.

In the embodiment of the present application, d2=d1 and d2 '=d1' may be designed. Based on this design, in the process of connecting the liquid cooling socket and the liquid cooling plug, the first connection confirmation socket and the first connection confirmation plug (i.e., CC 2) and the second connection confirmation socket and the second connection confirmation plug (i.e., CC 1) are simultaneously connected, which corresponds to the final complete connection confirmation performed by the liquid cooling device and the electric vehicle together. The design can also improve the efficiency of judging the connection state of the liquid cooling socket and the liquid cooling plug.

In one embodiment, the electric vehicle includes a traction device for drawing the liquid cooling gun into movement such that the first vehicle outlet and the liquid cooling gun are fully connected.

The liquid cooling connection confirmation socket further comprises a third liquid cooling connection confirmation socket, the distance from the second liquid cooling connection confirmation socket to the plug end is equal to the distance from the third liquid cooling connection confirmation socket to the plug end, the distance from the liquid inlet and outlet of the liquid cooling socket to the plug end is smaller than the distance from the third liquid cooling connection confirmation socket to the plug end, and the distance from the liquid inlet and outlet of the liquid cooling socket to the plug end is larger than or equal to the distance from the first liquid cooling connection confirmation socket to the plug end.

The liquid cooling connection confirmation plug further comprises a third liquid cooling connection confirmation plug, the distance from the second liquid cooling connection confirmation plug to the plug end is equal to the distance from the third liquid cooling connection confirmation plug to the plug end, the distance from the liquid inlet and outlet of the liquid cooling plug to the plug end is smaller than the distance from the third liquid cooling connection confirmation plug to the plug end, and the distance from the liquid inlet and outlet of the liquid cooling plug to the plug end is larger than or equal to the distance from the first liquid cooling connection confirmation plug to the plug end.

In an embodiment of the application, a traction device in an electric vehicle is used for traction of the liquid cooling gun movement so that a first vehicle socket and the liquid cooling gun are completely connected. In this case, when the user inserts the liquid cooling gun into the first vehicle socket, the liquid cooling gun and the first vehicle socket are first in the semi-connected state, and then the traction device draws the liquid cooling gun again to move so that the liquid cooling gun and the first vehicle socket are in the fully-connected state. Because in this process, draw the liquid cold gun removal by draw gear and make liquid cold gun and first vehicle socket be in the complete connected state, need not the user and manually promote liquid cold gun, can improve user experience.

Referring to fig. 9, in the embodiment of the present application, a third liquid-cooling connection confirmation socket and a third liquid-cooling connection confirmation plug are added to the embodiment shown in fig. 8, and the third liquid-cooling connection confirmation socket and the third liquid-cooling connection confirmation plug correspond to the CC3 port in fig. 9.

The distance from the first liquid cooling connection confirmation plug to the plug end is d2, and the distance from the first liquid cooling connection confirmation socket to the plug end is d2'. The distance from the second liquid cooling connection confirmation plug to the plug-in end is d1, the distance from the second liquid cooling connection confirmation socket to the plug-in end is d1', the distance from the third liquid cooling connection confirmation plug to the plug-in end is d3, the distance from the third liquid cooling connection confirmation socket to the plug-in end is d3', d2 is less than or equal to d0< d1=d3, d2 'is less than or equal to d0' < d1 '=d3'. Based on the design, in the process of connecting the liquid cooling socket and the liquid cooling plug, the contact of the first connection confirmation socket is firstly connected with the contact (namely CC 2) of the first connection confirmation plug, the liquid inlet and outlet of the liquid cooling socket is connected with the liquid inlet and outlet of the liquid cooling plug, then the contact of the second connection confirmation socket is finally connected with the contact (namely CC 1) of the second connection confirmation plug, and the contact of the third connection confirmation socket is finally connected with the contact (namely CC 3) of the third connection confirmation plug. The connection of the first liquid cooling connection confirmation socket and the first liquid cooling connection confirmation plug can indicate that the liquid cooling gun is in a semi-connection state with the vehicle socket, the connection of the second liquid cooling connection confirmation socket and the second liquid cooling connection confirmation plug, and the connection of the third liquid cooling connection confirmation socket and the third liquid cooling connection confirmation plug can indicate that the liquid cooling gun is in a complete connection state with the vehicle socket. Because d1=d3 and d1 '=d3', the final complete connection confirmation is carried out by the electric vehicle and the liquid cooling equipment together, namely, the connection state judgment time of the electric vehicle and the liquid cooling equipment to the liquid cooling socket and the liquid cooling plug is consistent, the liquid cooling medium can be ensured to be timely transmitted to the thermal management system of the power battery, and the misjudgment of the liquid cooling equipment can be avoided.

In this embodiment, when the contact of the first liquid-cooling connection confirmation socket is connected with the contact of the first liquid-cooling connection confirmation plug, the liquid-cooling socket and the liquid-cooling plug are indicated to be in a semi-connected state. The traction device can traction the liquid cooling gun to move so that the liquid cooling gun is close to the first vehicle socket, and finally the liquid cooling gun and the first vehicle socket are in a complete connection state, so that a user does not need to manually push the liquid cooling gun, and the user experience can be improved. If d0< d2 is designed, that is, the contact of the liquid inlet and outlet of the liquid cooling socket is connected with the contact of the liquid inlet and outlet of the liquid cooling plug first, the contact of the first liquid cooling connection confirmation socket is connected with the contact of the first liquid cooling connection confirmation plug, so that the design has the defect that the contact of the liquid inlet and outlet of the liquid cooling socket is required to be connected with the contact of the liquid inlet and outlet of the liquid cooling plug first by a user, however, the contact of the liquid inlet and outlet of the liquid cooling socket is difficult to be connected with the contact of the liquid inlet and outlet of the liquid cooling plug by the user successfully, and the user experience is reduced.

In addition, in the embodiment of the present application, the distance from the second liquid-cooling connection confirmation socket to the plug end is designed to be equal to the distance from the third liquid-cooling connection confirmation socket to the plug end, and the distance from the second liquid-cooling connection confirmation plug to the plug end is designed to be equal to the distance from the third liquid-cooling connection confirmation plug to the plug end, that is, d1=d3, d1 '=d3'. This is because if d1> d3 and d1'> d3' are designed, it is explained that the third liquid-cooling connection confirmation socket is connected to the third liquid-cooling connection confirmation plug first, the second liquid-cooling connection confirmation socket is connected to the second liquid-cooling connection confirmation plug later, and the third liquid-cooling connection confirmation socket is connected to the third liquid-cooling connection confirmation plug successfully, but the second liquid-cooling connection confirmation socket is not connected to the second liquid-cooling connection confirmation plug at all times. Based on this kind of condition, liquid cooling equipment judges that liquid cooling socket and liquid cooling plug are not connected, and liquid cooling equipment can not transmit cooling medium to power battery's thermal management system to the heat dissipation problem when unable power battery charges, influence power battery's high-power charging.

If d1< d3, d1'< d3', it is described that the second liquid-cooling connection confirmation socket is connected to the second liquid-cooling connection confirmation plug first, and the third liquid-cooling connection confirmation socket is connected to the third liquid-cooling connection confirmation plug later, there is a possibility that the second liquid-cooling connection confirmation socket is connected to the second liquid-cooling connection confirmation plug successfully but the third liquid-cooling connection confirmation socket is not connected to the third liquid-cooling connection confirmation plug. Based on this situation, the liquid cooling device judges that the liquid cooling socket and the liquid cooling plug are connected, but the actual electric vehicle judges that the liquid cooling socket and the liquid cooling plug are not connected, so that erroneous judgment of the liquid cooling device occurs.

Of course, in some possible embodiments, the second connection confirmation port, that is, the CC1 port, may not be provided in the liquid cooling gun, and when the electric vehicle determines that the liquid cooling socket and the liquid cooling plug are successfully connected, the electric vehicle sends a message for indicating that the liquid cooling socket and the liquid cooling plug are successfully connected to the liquid cooling device.

It is noted that, in the case where the electric vehicle includes the traction device, the contact of the first connection confirmation socket is connected with the contact of the first connection confirmation plug (i.e., CC 2) first, the liquid cooling gun may be considered to be in a semi-connected state with the electric vehicle, and the specific circuit design form thereof may refer to fig. 10.

Referring to fig. 10, the first connection confirmation receptacle is connected to the voltage source U2 through R5, and the first connection confirmation receptacle is also connected to the voltage source U2 through R7. The vehicle-mounted charging connection device can judge whether the liquid cooling gun and the electric vehicle are in a semi-connection state based on a detection point 5 between the first connection confirmation socket and the R7. When the user inserts the liquid cooling gun into the vehicle socket, before the liquid cooling gun is not in the semi-connected state with the electric vehicle, the voltage of the detection point 5 should be the voltage output by the voltage source U2 because the detection point 5 is connected with the voltage source U2. Only when the liquid cooling gun and the electric vehicle are in a semi-connected state, the current of the voltage source U2 forms a loop through the resistor R7 in the electric vehicle, the resistor R6 in the liquid cooling device and the grounding wire in the liquid cooling device. Since the detection point 5 is located between the resistor R7 and the resistor R6, the voltage at the detection point 5 reaches the preset value due to the voltage dividing function of the resistor.

For example, the voltage output by the voltage source U2 is set to 12V, and the resistances of R7 and R6 are equal, and the third preset value is set to 6V. In this design, if the voltage at the detection point 5 is 6V, it is indicated that the liquid cooling socket and the liquid cooling plug are in a semi-connected state.

Based on the above analysis, when the voltage at the detection point 5 is the voltage output by the voltage source U2, it is indicated that the liquid cooling plug is not connected to the liquid cooling socket. When the voltage of the detection point 5 is a third preset value, the liquid cooling socket and the liquid cooling plug are in a semi-connection state.

In one embodiment, in response to successful connection of the liquid cooling receptacle to the liquid cooling plug, the vehicle-mounted charging connection device is configured to send a message indicating successful connection of the liquid cooling receptacle to the liquid cooling plug. Correspondingly, the liquid cooling device is used for receiving a message indicating that the liquid cooling socket and the liquid cooling plug are successfully connected.

In this embodiment of the application, when on-vehicle charging connection device judges that liquid cooling socket and liquid cooling plug are connected successfully, on-vehicle charging connection device can send a message to liquid cooling equipment, and this message is used for instructing liquid cooling socket and liquid cooling plug to be connected successfully. After the liquid cooling device receives the message, the connection state of the liquid cooling plug and the liquid cooling socket is not required to be judged according to the voltage of the detection point in the connection confirmation circuit, and the judging efficiency is improved.

In addition, the application also provides an electric vehicle, which comprises an on-vehicle charging connection device, a power battery and a thermal management system. The thermal management system is used for radiating heat for the power battery.

The vehicle-mounted charging connection device comprises a first vehicle socket and a liquid cooling connection confirmation circuit, wherein the first vehicle socket comprises a liquid cooling socket and a liquid cooling connection confirmation socket. One end of the liquid cooling socket is used for being connected with a liquid cooling plug of the liquid cooling gun, the other end of the liquid cooling socket is connected with the thermal management system through a liquid cooling pipeline, and the liquid cooling socket is used for receiving cooling liquid output by the liquid cooling plug or is used for outputting cooling liquid to the liquid cooling plug. One end of the liquid cooling connection confirmation socket is used for being connected with a liquid cooling connection confirmation plug of the liquid cooling gun, and the other end of the liquid cooling connection confirmation socket is connected with a liquid cooling connection confirmation circuit.

The electric vehicle is used for judging the connection state of the liquid cooling socket and the liquid cooling plug through the liquid cooling connection confirming circuit. The vehicle-mounted charging connection device in the electric vehicle judges the connection state of the liquid cooling socket and the liquid cooling plug according to the liquid cooling connection confirmation circuit, and the specific manner of judging the connection state of the direct current socket and the direct current plug according to the charging connection confirmation circuit is referred to the related content above, and will not be repeated.

The application also provides a fill electric pile, fill electric pile including liquid cooling equipment, power module and rifle that charges. The charging gun is connected with the power module and used for charging the electric vehicle.

The liquid cooling equipment comprises a liquid cooling gun plug, a liquid cooling connection confirming circuit and a liquid cooling system, wherein the liquid cooling gun plug comprises a liquid cooling plug and a liquid cooling connection confirming plug, one end of the liquid cooling plug is used for being connected with a liquid cooling socket of an electric vehicle, and the other end of the liquid cooling plug is connected with the liquid cooling system. One end of the liquid cooling connection confirmation plug is used for being connected with a liquid cooling connection confirmation socket of the electric vehicle, and the other end of the liquid cooling connection confirmation plug is connected with a liquid cooling connection confirmation circuit.

The charging pile is used for judging the connection state of the liquid cooling plug and the liquid cooling socket through the liquid cooling connection confirming circuit.

The specific manner of the charging pile for judging the connection state of the liquid cooling plug and the liquid cooling socket according to the liquid cooling connection confirmation circuit refers to the related content of specific identification of the liquid cooling device in the above description, and will not be repeated.

It is noted that the liquid cooling device determines the connection state of the liquid cooling socket and the liquid cooling plug according to the voltage of the detection point in the connection confirmation circuit, and in some embodiments, the liquid cooling device may also identify the connection state of the liquid cooling socket and the liquid cooling plug based on other manners, which will be described in detail below.

The embodiment of the application provides a vehicle-mounted charging connection device, and vehicle-mounted charging connection device is applied to electric vehicle, and vehicle-mounted charging connection device includes first vehicle socket, liquid cooling connection confirmation circuit, and first vehicle socket includes liquid cooling socket and liquid cooling connection confirmation socket, and first vehicle socket is used for connecting the liquid cooling rifle of liquid cooling equipment.

One end of the liquid cooling socket is used for being connected with a liquid cooling plug of the liquid cooling gun, the other end of the liquid cooling socket is connected with a thermal management system of the power battery through a liquid cooling pipeline, and the liquid cooling socket is used for receiving cooling liquid output by the liquid cooling plug or is used for outputting the cooling liquid to the liquid cooling plug.

One end of the liquid cooling connection confirmation socket is used for being connected with a liquid cooling connection confirmation plug of the liquid cooling gun, and the other end of the liquid cooling connection confirmation socket is connected with a liquid cooling connection confirmation circuit.

The vehicle-mounted charging connection device is used for: judging the connection state of the liquid cooling socket and the liquid cooling plug through the liquid cooling connection confirming circuit; and responding to successful connection of the liquid cooling socket and the liquid cooling plug, and sending a message for indicating successful connection of the liquid cooling socket and the liquid cooling plug to the liquid cooling equipment.

Correspondingly, for the liquid cooling equipment, the liquid cooling equipment comprises a liquid cooling gun plug, a liquid cooling connection confirming circuit and a liquid cooling system, the liquid cooling gun plug comprises a liquid cooling plug and a liquid cooling connection confirming plug, one end of the liquid cooling plug is used for being connected with a liquid cooling socket of an electric vehicle, and the other end of the liquid cooling plug is connected with the liquid cooling system through a pipeline.

The liquid cooling equipment is used for receiving a message sent by the electric vehicle and used for indicating that the liquid cooling socket and the liquid cooling plug are successfully connected; in response to successful connection of the liquid cooling plug and the liquid cooling socket, the liquid cooling system is configured to output a cooling liquid to the electric vehicle through the liquid cooling plug.

In this embodiment, the liquid cooling socket is except including the inlet and outlet, still include the liquid cooling and connect the affirmation socket, because liquid cooling is connected the affirmation socket and is connected the affirmation circuit with the liquid cooling, consequently, on-vehicle charging connection device can judge the connected state of liquid cooling socket and liquid cooling plug according to liquid cooling connection affirmation circuit, and under the condition that liquid cooling socket and liquid cooling plug are connected successfully, when charging device charges power battery with high-power, receive the coolant liquid from the liquid cooling equipment through the liquid cooling socket, transmit this coolant liquid to power battery's thermal management system in order to realize cooling power battery, thereby can solve the heat dissipation problem when power battery charges, improve charging device and charge power for power battery. In addition, the vehicle-mounted charging connection device can send a message to the liquid cooling equipment under the condition that the liquid cooling socket and the liquid cooling plug are judged to be successfully connected, and the message indicates that the liquid cooling socket and the liquid cooling plug are successfully connected. Therefore, the liquid cooling equipment does not need to judge the connection state of the liquid cooling socket and the liquid cooling plug, so that the time for judging the connection state of the socket and the plug is saved, and the efficiency is improved.

In one embodiment, when the liquid cooling socket is connected to the liquid cooling plug, the liquid cooling connection confirmation circuit connected to the liquid cooling connection confirmation socket and the liquid cooling connection confirmation circuit connected to the liquid cooling connection confirmation plug form a current loop, and the vehicle-mounted charging connection device is used for detecting a voltage at a detection point in the current loop to determine a connection state of the liquid cooling socket and the liquid cooling plug.

And responding to the voltage of the detection point in the liquid cooling connection confirmation circuit reaching a preset value at the vehicle end, wherein the vehicle-mounted charging connection device is used for judging that the liquid cooling socket and the liquid cooling plug are successfully connected.

In this embodiment, when the liquid cooling socket is connected with the liquid cooling plug, the liquid cooling connection confirmation circuit forms a current loop with the liquid cooling connection confirmation circuit of the charging pile through the liquid cooling connection confirmation socket and the liquid cooling connection confirmation plug. And a detection point can be arranged in the current loop, and when the voltage of the detection point in the current loop reaches a preset vehicle end value, the vehicle-mounted charging connection device judges that the liquid cooling socket and the liquid cooling plug are successfully connected.

The preset vehicle end value in the embodiment of the present application relates to a specific circuit form of the liquid-cooled connection confirmation circuit and a position of the detection point, and the following is specifically referred to in fig. 11 and fig. 12.

In one embodiment, the vehicle socket further comprises a grounding socket, one end of the grounding socket is used for being connected with a grounding plug of the liquid cooling gun, the other end of the grounding socket is connected with the vehicle body ground platform, the liquid cooling connection confirmation plug comprises a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug, the liquid cooling connection confirmation circuit comprises a wire, and the first liquid cooling connection confirmation plug is connected with the second liquid cooling connection confirmation plug through the wire; the liquid-cooling connection confirmation socket comprises a first liquid-cooling connection confirmation socket and a second liquid-cooling connection confirmation socket, and the liquid-cooling connection confirmation circuit comprises a first resistance unit. The first liquid cooling connection confirmation socket is connected with a voltage source through the first resistor unit, and the second liquid cooling connection confirmation circuit is connected with the vehicle body ground platform.

In one embodiment, the vehicle-mounted charging connection device is used for judging that the liquid cooling socket and the liquid cooling plug are successfully connected in response to the fact that the voltage of the detection point between the first resistance unit and the first liquid cooling connection confirmation socket reaches the vehicle end preset value.

Fig. 11 is a schematic diagram of a heat dissipation system according to an embodiment of the present application. The first resistor unit comprises a resistor R5, the first liquid cooling connection confirmation socket is a socket corresponding to the CC2 port, and the voltage source is U2. The detection point between the first resistor unit and the first liquid cooling connection confirmation socket is the detection point 2.

Before the liquid cooling socket is not connected with the liquid cooling plug, since the detection point 2 is connected with the voltage source U2, the voltage of the detection point 2 should be the voltage output by the voltage source U2. Only when the liquid cooling socket is connected with the liquid cooling plug, the voltage source U2 forms a loop through the resistor R5 in the electric vehicle, the cable in the liquid cooling device and the ground wire in the electric vehicle, and the voltage of the detection point 2 can reach the preset vehicle end value. Since the detection point 2 is connected to the ground line, the voltage at the detection point 2 should be 0V.

Therefore, based on the above analysis, in the case where the voltage at the detection point 2 is the voltage output from the voltage source U2, the in-vehicle charging connection device can recognize that the liquid cooling outlet is not connected to the liquid cooling plug. When the voltage of the detection point 2 reaches a preset value of a vehicle end, the vehicle-mounted charging connection device can identify that the liquid cooling socket and the liquid cooling plug are successfully connected.

In one embodiment, the vehicle socket further comprises a grounding socket, one end of the grounding socket is used for being connected with a grounding plug of the liquid cooling gun, the other end of the grounding socket is connected with the vehicle body ground platform, the liquid cooling connection confirmation plug comprises a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug, the liquid cooling connection confirmation circuit comprises a wire, and the first liquid cooling connection confirmation plug is connected with the second liquid cooling connection confirmation plug through the wire.

The liquid-cooling connection confirmation socket comprises a first liquid-cooling connection confirmation socket and a second liquid-cooling connection confirmation socket, and the liquid-cooling connection confirmation circuit comprises a second resistance unit.

The first liquid cooling connection confirmation socket is connected with a voltage source, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform through the second resistance unit.

In one embodiment, the vehicle-mounted charging connection device is used for judging that the liquid cooling socket and the liquid cooling plug are successfully connected in response to the fact that the voltage of the detection point between the second resistance unit and the second liquid cooling connection confirmation socket reaches the vehicle end preset value.

Fig. 12 is a schematic diagram of a heat dissipation system according to an embodiment of the present application. The second resistor unit comprises a resistor R5', the second liquid cooling connection confirmation socket is a socket corresponding to the CC1 port, and the voltage source is U2. The detection point between the second resistance unit and the second liquid cooling connection confirmation socket is the detection point 3.

Before the liquid cooling socket is not connected with the liquid cooling plug, since the detection point 3 is connected with the vehicle body platform, the voltage of the detection point 3 should be 0V. Only when the liquid cooling socket is connected with the liquid cooling plug, the voltage source U2 forms a loop through a cable in the liquid cooling device, a resistor R5' in the electric vehicle and a grounding wire in the electric vehicle, and the voltage of the detection point 3 can reach a preset vehicle end value. Further, since the detection point 3 is connected to the voltage source U2, the voltage at the detection point 3 should be the voltage output by the voltage source U2.

Therefore, based on the above analysis, when the voltage at the detection point 3 is 0V, the in-vehicle charging connection device can recognize that the liquid cooling plug is not connected to the liquid cooling socket. When the voltage of the detection point 3 reaches a preset value of a vehicle end, the vehicle-mounted charging connection device can identify that the liquid cooling socket and the liquid cooling plug are successfully connected.

In one embodiment, the vehicle-mounted charging connection device and the liquid cooling device each comprise a wireless communication module; the vehicle-mounted charging connection device is used for sending a message to the charging pile through the wireless communication module. Correspondingly, the liquid cooling equipment also comprises a wireless communication module; the liquid cooling equipment is used for receiving and sending messages through the wireless communication module.

The wireless communication module in the embodiment of the application may include bluetooth, wiFi, star flash, and the like.

In one embodiment, the in-vehicle charging connection device further comprises a charging connection confirmation circuit and a second vehicle outlet, the second vehicle outlet comprising a dc outlet and a charging connection confirmation outlet; one end of the direct current socket is used for being connected with a direct current plug of the charging gun, and the other end of the direct current socket is connected with a power battery; one end of the charging connection confirmation socket is used for being connected with a connection confirmation plug of the charging gun, and the other end of the charging connection confirmation socket is connected with a charging connection confirmation circuit; the vehicle-mounted charging connection device is used for judging the connection state of the direct-current socket and the direct-current plug through the charging connection confirmation circuit.

In one embodiment, the second vehicle outlet further comprises an auxiliary power outlet, one end of the auxiliary power outlet is used for being connected with an auxiliary power plug of the charging gun, and the other end of the auxiliary power outlet is used for receiving direct current; the second vehicle socket further comprises a second communication socket, one end of the second communication socket is used for being connected with a communication plug of the charging gun, and the other end of the second communication socket is connected with the controller.

The details of this part are specifically referred to the relevant details in the above embodiments, and are not described in detail.

According to the embodiment, the electric vehicle judges the connection state of the liquid cooling socket and the liquid cooling plug according to the connection confirmation circuit, and sends a message for informing the liquid cooling device that the liquid cooling socket and the liquid cooling plug are successfully connected to the liquid cooling device under the condition that the liquid cooling socket and the liquid cooling plug are successfully connected. In another possible embodiment, the message may also be sent by the liquid cooling device to the vehicle charging connection. The liquid cooling device can judge the connection state of the liquid cooling socket and the liquid cooling plug according to the connection confirmation circuit, and sends a message for informing the vehicle-mounted charging connection device that the liquid cooling socket and the liquid cooling plug are successfully connected to the vehicle-mounted charging pile device under the condition that the liquid cooling socket and the liquid cooling plug are successfully connected.

In addition, the application also provides an electric vehicle, which comprises an on-vehicle charging connection device, a power battery and a thermal management system. The vehicle-mounted charging connection device is applied to an electric vehicle and comprises a first vehicle socket and a liquid cooling connection confirmation circuit, wherein the first vehicle socket comprises a liquid cooling socket and a liquid cooling connection confirmation socket, and the first vehicle socket is used for being connected with a liquid cooling gun of liquid cooling equipment. One end of the liquid cooling socket is used for being connected with a liquid cooling plug of the liquid cooling gun, the other end of the liquid cooling socket is connected with a thermal management system of the power battery through a liquid cooling pipeline, and the liquid cooling socket is used for receiving cooling liquid output by the liquid cooling plug or is used for outputting the cooling liquid to the liquid cooling plug; one end of the liquid cooling connection confirmation socket is used for being connected with a liquid cooling connection confirmation plug of the liquid cooling gun, and the other end of the liquid cooling connection confirmation socket is connected with a liquid cooling connection confirmation circuit. The electric vehicle is for: judging the connection state of the liquid cooling socket and the liquid cooling plug through the liquid cooling connection confirming circuit; and responding to successful connection of the liquid cooling socket and the liquid cooling plug, and sending a message for indicating successful connection of the liquid cooling socket and the liquid cooling plug to the liquid cooling equipment.

The application also provides a fill electric pile, fill electric pile including liquid cooling equipment, power module and rifle that charges. The liquid cooling equipment comprises a liquid cooling gun plug, a liquid cooling connection confirming circuit and a liquid cooling system, wherein the liquid cooling gun plug comprises a liquid cooling plug and a liquid cooling connection confirming plug, one end of the liquid cooling plug is used for being connected with a liquid cooling socket of an electric vehicle, and the other end of the liquid cooling plug is connected with the liquid cooling system through a pipeline. One end of the liquid cooling connection confirmation plug is used for being connected with a liquid cooling connection confirmation socket of the electric vehicle, and the other end of the liquid cooling connection confirmation plug is connected with a liquid cooling connection confirmation circuit. The liquid cooling device is used for receiving a message sent by the electric vehicle and used for indicating that the liquid cooling socket and the liquid cooling plug are successfully connected. In response to successful connection of the liquid cooling plug and the liquid cooling socket, the liquid cooling system is configured to output a cooling liquid to the electric vehicle through the liquid cooling plug.

The content of the charging pile related to the liquid cooling device refers to the specific related content of the liquid cooling device, and is not repeated.

In addition, the application still provides a control guidance circuit for electric vehicle and liquid cooling equipment, and control guidance circuit includes connection confirmation circuit, and electric vehicle includes liquid cooling socket and liquid cooling connection confirmation socket, and liquid cooling equipment includes liquid cooling plug and liquid cooling connection confirmation plug.

One end of the liquid cooling plug is used for connecting with one end of the liquid cooling plug, the other end of the liquid cooling plug is used for connecting with a thermal management system of a power battery of the electric vehicle, and the other end of the liquid cooling plug is used for receiving or outputting cooling liquid.

The connection confirmation circuit comprises a vehicle end connection confirmation circuit and a pile end connection confirmation circuit, wherein the vehicle end connection confirmation circuit is positioned on the electric vehicle, the pile end connection confirmation circuit is positioned on the liquid cooling equipment and is connected with the liquid cooling socket, and the pile end connection confirmation circuit is connected with the liquid cooling plug.

Under the condition that the liquid cooling plug is connected with the liquid cooling socket, the vehicle end connection confirming circuit and the pile end connection confirming circuit form a loop, and the voltage of a detection point in the loop is used for indicating the connection state of the liquid cooling plug and the liquid cooling socket.

The control guidance circuit in the embodiment of the application can be applied to electric vehicles and liquid cooling equipment, in other words, one part of the control guidance circuit (namely, a vehicle end connection confirmation circuit) is positioned in the electric vehicle, and the other part of the control guidance circuit (namely, a pile end connection confirmation circuit) is positioned in the liquid cooling equipment. When the liquid cooling plug is not connected to the liquid cooling receptacle, the vehicle-end connection confirmation circuit in the electric vehicle is a separate circuit, and the pile-end connection confirmation circuit in the liquid cooling device is a separate circuit. Only when the liquid cooling plug is connected with the liquid cooling socket, the vehicle end connection confirmation circuit in the electric vehicle and the pile end connection confirmation circuit in the liquid cooling device can form a loop.

In the prior art, a connection port of a cooling system under a vehicle is only a single liquid inlet and outlet, and under the condition that a charging pile charges a power battery of an electric vehicle, the electric vehicle and the cooling system under the vehicle cannot mutually identify whether to connect or not, so that the normal operation of the charging pile for carrying out high-power charging on the power battery can be influenced. In this embodiment of the present application, the voltage at the detection point in the control guiding circuit may indicate the connection state of the liquid cooling plug and the liquid cooling socket. Therefore, under the condition that the voltage of the detection point indicates that the liquid cooling socket and the liquid cooling plug are successfully connected, when the charging pile charges the power battery with high power, the liquid cooling device can realize cooling of the power battery by injecting a cooling medium into the power battery, so that the heat dissipation problem during charging of the power battery can be solved, and the charging power of the charging device for the power battery is improved.

The specific circuit form of the control steering circuit will be described below.

In one embodiment, the liquid cooling device further comprises a grounding plug, one end of the grounding plug is used for being connected with one end of the grounding plug, the other end of the grounding plug is used for being connected with the device grounding platform, the other end of the grounding plug is used for being connected with the vehicle body grounding platform, the liquid cooling connection confirmation socket comprises a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, and the liquid cooling connection confirmation plug comprises a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug.

The vehicle end connection confirmation circuit comprises a first vehicle end connection confirmation circuit, the first vehicle end connection confirmation circuit comprises a first resistor and a first voltage source, and the first liquid cooling connection confirmation socket is connected with the first voltage source through the first resistor.

The pile end connection confirmation circuit comprises a first pile end connection confirmation circuit, the first pile end connection confirmation circuit comprises a second resistor, and the first liquid cooling connection confirmation plug is connected with the equipment ground platform through the second resistor.

The detection point is positioned between the first liquid cooling connection confirmation socket and the first resistor.

In one embodiment, the first liquid-cooled connection confirms that the voltage at the detection point between the socket and the first resistor reaches a first preset value, and indicates that the liquid-cooled plug and the liquid-cooled socket are successfully connected.

Referring to fig. 4, the first resistor and the second resistor in the embodiment of the present application include resistors R5 and R3, respectively, the first voltage source is U2, and the detection point between the first resistor and the first liquid cooling connection confirmation socket is the detection point 2.

Before the liquid cooling socket is not connected with the liquid cooling plug, since the detection point 2 is connected with the first voltage source U2, the voltage of the detection point 2 should be the voltage output by the first voltage source U2. Only when the liquid cooling socket is connected with the liquid cooling plug, the first voltage source U2 forms a loop through the resistor R5 in the electric vehicle, the resistor R3 in the liquid cooling device and the ground wire in the liquid cooling device, and the voltage of the detection point 2 can reach the first preset value due to the voltage dividing function of the resistor.

For example, the voltage output by the first voltage source U2 is set to 12V, and the resistances of R3 and R5 are equal, and then the first preset value is set to 6V. In this design, if the voltage at the detection point 2 is 6V, it is indicated that the liquid cooling socket and the liquid cooling plug are in a connected state.

For another example, the voltage output by the first voltage source U2 is still set to be 12V, but the resistance values of R3 and R5 are different, if R3 is 2Ω and R5 is 4Ω, the first preset value is 4V. In this design, if the voltage at the detection point 2 is 4V, it is indicated that the liquid cooling socket and the liquid cooling plug are in a connected state.

Therefore, based on the above analysis, when the voltage at the detection point 2 is the voltage output from the first voltage source U2, it is explained that the liquid-cooled socket is not connected to the liquid-cooled plug. And when the voltage of the detection point 2 reaches a first preset value, the successful connection of the liquid cooling socket and the liquid cooling plug is indicated.

In one embodiment, the vehicle end connection verification circuit further includes a second vehicle end connection verification circuit, the second vehicle end connection verification circuit including a third resistor, the second liquid-cooled connection verification socket being connected to the vehicle body ground platform through the third resistor.

The pile end connection confirmation circuit further comprises a second pile end connection confirmation circuit, the second pile end connection confirmation circuit comprises a fourth resistor and a second voltage source, and the second liquid cooling connection confirmation plug is connected with the second voltage source through the fourth resistor.

The detection point is positioned between the second liquid cooling connection confirmation plug and the fourth resistor.

In one embodiment, the voltage at the detection point between the first liquid cooling connection confirmation socket and the first resistor reaches a first preset value, and the voltage at the detection point between the second liquid cooling connection confirmation plug and the fourth resistor reaches a second preset value, which indicates that the liquid cooling plug and the liquid cooling socket are successfully connected.

Referring to fig. 4 described above, the third resistor and the fourth resistor in the embodiment of the present application include R4 and R1, respectively. The second voltage source in the liquid cooling equipment is U1, and a detection point between the second liquid cooling connection confirmation plug and the fourth resistor is detection point 1.

Before the liquid cooling socket is not connected with the liquid cooling plug, since the detection point 1 is connected with the second voltage source U1 and the detection point 2 is connected with the first voltage source U2, the voltage of the detection point 1 should be the voltage output by the second voltage source U1, and the voltage of the detection point 2 should be the voltage output by the first voltage source U2. Only when the liquid cooling socket is connected with the liquid cooling plug, the second voltage source U1 in the liquid cooling device forms a loop through the resistor R1, the resistor R4 in the electric vehicle and the grounding wire in the liquid cooling device, the first voltage source U2 forms a loop through the resistor R5 and the resistor R3, the voltage of the detection point 1 can reach a second preset value due to the voltage dividing function of the resistor, and the voltage of the detection point 2 can reach a first preset value.

For example, the voltages output by the first voltage source U2 and the second voltage source U1 are set to 12V, the resistances of R1 and R4 are equal, and the resistances of R5 and R3 are equal, so that the first preset value and the second preset value are set to 6V. In this design, if the voltage at the detection point 1 and the voltage at the detection point 2 are 6V, it is indicated that the liquid cooling socket and the liquid cooling plug are in a connected state.

Therefore, based on the above analysis, when the voltage at the detection point 2 is the voltage output by the first voltage source U2 and the voltage at the detection point 1 is the voltage output by the second voltage source U1, it is described that the liquid cooling plug is not connected to the liquid cooling socket. And when the voltage of the detection point 2 reaches a first preset value and the voltage of the detection point 1 reaches a second preset value, the liquid cooling socket and the liquid cooling plug are successfully connected.

In some embodiments, the connection state of the liquid cooling socket and the liquid cooling plug may also be determined according to the voltage of the detection point 1.

In one embodiment, the second pile end connection confirmation circuit further includes a normally closed switch, and the normally closed switch is located between the fourth resistor and the second liquid cooling connection confirmation plug.

In one embodiment, the detection point comprises two detection points, wherein one detection point is positioned between the fourth resistor and the normally closed switch, and the other detection point is positioned between the second liquid cooling connection confirmation plug and the normally closed switch.

In one embodiment, the voltage at the detection point between the fourth resistor and the normally closed switch and the voltage at the detection point between the second liquid cooling connection confirmation plug and the normally closed switch reach a second preset value, so as to indicate that the liquid cooling plug and the liquid cooling socket are successfully connected.

Referring to fig. 5, two detection points in the embodiment of the present application are detection point 1 and detection point 4, respectively, and the specific determination process is referred to the above description about fig. 5 and will not be repeated.

In one embodiment, the electric vehicle further comprises a grounding socket, one end of the grounding socket is used for being connected with a grounding plug of the liquid cooling gun, the other end of the grounding socket is connected with the vehicle body ground platform, the liquid cooling connection confirmation socket comprises a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, and the liquid cooling connection confirmation plug comprises a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug.

The vehicle end connection confirmation circuit comprises a third vehicle end connection confirmation circuit and a fourth vehicle end connection confirmation circuit, the third vehicle end connection confirmation circuit comprises a fifth resistor and a third voltage source, the first liquid cooling connection confirmation socket is connected with the first voltage source through the first resistor, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform.

The pile end connection confirmation circuit comprises a wire, and the first liquid cooling connection confirmation plug is connected with the second liquid cooling connection confirmation plug through the wire.

The detection point is positioned between the fifth resistor and the first liquid cooling connection confirmation socket.

In one embodiment, the voltage at the detection point between the fifth resistor and the first liquid cooling connection confirmation socket reaches a third preset value, which indicates that the liquid cooling plug and the liquid cooling socket are successfully connected.

In this embodiment, the fifth resistor is R5, the third voltage source is U2, and the detection point between the fifth resistor and the first liquid cooling connection confirmation socket is the detection point 2 in fig. 11. The specific process is referred to the related content of fig. 11, and will not be described again.

The vehicle end connection confirmation circuit comprises a fifth vehicle end connection confirmation circuit and a sixth vehicle end connection confirmation circuit, the fifth vehicle end connection confirmation circuit comprises a fourth voltage source, the sixth vehicle end connection confirmation circuit comprises a sixth resistor, the first liquid cooling connection confirmation socket is connected with the fourth voltage source, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform through the sixth resistor.

The detection point is positioned between the sixth resistor and the second liquid cooling connection confirmation socket.

In one embodiment, the sixth resistor is connected with the second liquid cooling connection to confirm that the voltage at the detection point between the socket reaches a fourth preset value, which indicates that the liquid cooling plug is successfully connected with the liquid cooling socket.

In this embodiment, the sixth resistor is R5', the fourth voltage source is U2, and the detection point between the sixth resistor and the second liquid cooling connection confirmation socket is the detection point 3 in fig. 12. Details of the foregoing related content of fig. 12 are not described in detail.

In one embodiment, the control guidance circuit further comprises a communication circuit, the liquid cooling apparatus further comprises a communication plug, and the vehicle outlet further comprises a communication outlet. The communication circuit comprises a first communication circuit positioned on the liquid cooling equipment and a second communication circuit positioned on the electric vehicle, one end of the first communication circuit is connected with the controller of the liquid cooling equipment, the other end of the first communication circuit is connected with the communication plug, one end of the second communication circuit is connected with the controller of the electric vehicle, and the other end of the second communication circuit is connected with the communication socket.

The communication socket and the communication plug in the embodiments of the present application are the socket and the plug corresponding to s+ and S-in fig. 4-6 and fig. 11-12, and specific reference may be made to the related content about s+ and S-in fig. 7, which is not repeated.

In one embodiment, the control and steering circuit further comprises an auxiliary power circuit, the liquid cooling apparatus further comprises an auxiliary power plug, and the vehicle outlet further comprises an auxiliary power outlet. The auxiliary power supply circuit comprises a first auxiliary power supply circuit located on the liquid cooling device and a second auxiliary power supply circuit located on the electric vehicle, one end of the first auxiliary power supply circuit is connected with a controller of the liquid cooling device, the other end of the first auxiliary power supply circuit is connected with an auxiliary power supply plug, one end of the second auxiliary power supply circuit is connected with the controller of the electric vehicle, and the other end of the second auxiliary power supply circuit is connected with an auxiliary power supply socket.

The auxiliary power socket and the auxiliary power plug in the embodiments of the present application may refer to the design of fig. 7, and will not be described again.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The control guide circuit is applied to an electric vehicle and liquid cooling equipment and is characterized by comprising a connection confirmation circuit, wherein the electric vehicle comprises a liquid cooling socket and a liquid cooling connection confirmation socket, and the liquid cooling equipment comprises a liquid cooling plug and a liquid cooling connection confirmation plug;

one end of the liquid cooling plug is used for connecting with one end of the liquid cooling plug, the other end of the liquid cooling plug is used for connecting with a thermal management system of a power battery of the electric vehicle, and the other end of the liquid cooling plug is used for receiving or outputting cooling liquid;

the connection confirmation circuit comprises a vehicle end connection confirmation circuit positioned on the electric vehicle and a pile end connection confirmation circuit positioned on the liquid cooling equipment, wherein the vehicle end connection confirmation circuit is connected with the liquid cooling socket, and the pile end connection confirmation circuit is connected with the liquid cooling plug;

and under the condition that the liquid cooling plug is connected with the liquid cooling socket, the vehicle end connection confirming circuit and the pile end connection confirming circuit form a loop, and the voltage of a detection point in the loop is used for indicating the connection state of the liquid cooling plug and the liquid cooling socket.

2. The control guidance circuit of claim 1, wherein the liquid cooling device further comprises a ground plug, the electric vehicle further comprises a ground socket, one end of the ground plug is used for connecting with one end of the ground socket, the other end of the ground plug is used for connecting with a device ground platform, the other end of the ground socket is used for connecting with a vehicle body ground platform, the liquid cooling connection confirmation socket comprises a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, and the liquid cooling connection confirmation plug comprises a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug;

The vehicle end connection confirmation circuit comprises a first vehicle end connection confirmation circuit, the first vehicle end connection confirmation circuit comprises a first resistor and a first voltage source, and the first liquid cooling connection confirmation socket is connected with the first voltage source through the first resistor;

the pile end connection confirmation circuit comprises a first pile end connection confirmation circuit, the first pile end connection confirmation circuit comprises a second resistor, and the first liquid cooling connection confirmation plug is connected with the equipment ground platform through the second resistor;

3. The control and steering circuit of claim 2, wherein the first liquid-cooled connection confirms that the voltage at the detection point between the socket and the first resistor reaches a first predetermined value indicating successful connection of the liquid-cooled plug to the liquid-cooled socket.

4. A control guidance circuit according to claim 2 or 3, wherein the vehicle end connection verification circuit further comprises a second vehicle end connection verification circuit comprising a third resistor through which the second liquid-cooled connection verification socket is connected to the vehicle body ground platform;

The pile end connection confirmation circuit further comprises a second pile end connection confirmation circuit, the second pile end connection confirmation circuit comprises a fourth resistor and a second voltage source, and the second liquid cooling connection confirmation plug is connected with the second voltage source through the fourth resistor;

5. The control guidance circuit of claim 4, wherein the voltage at the detection point between the first liquid-cooled connection confirmation socket and the first resistor reaches a first preset value, and the voltage at the detection point between the second liquid-cooled connection confirmation plug and the fourth resistor reaches a second preset value, indicating that the liquid-cooled plug and the liquid-cooled socket are successfully connected.

6. The control pilot circuit of claim 4 or 5, wherein the second tip connection confirmation circuit further comprises a normally closed switch located between the fourth resistor and the second liquid-cooled connection confirmation plug.

7. The control guidance circuit of claim 6, wherein the sense point comprises two sense points, one sense point being located between the fourth resistor and the normally closed switch and the other sense point being located between the second liquid-cooled connection confirmation plug and the normally closed switch.

8. The control and steering circuit of claim 6 or 7, wherein the voltage at the detection point between the fourth resistor and the normally closed switch and the voltage at the detection point between the second liquid-cooled connection confirmation plug and the normally closed switch both reach a second predetermined value, indicating that the liquid-cooled plug and the liquid-cooled socket are successfully connected.

9. The control guidance circuit of claim 1, wherein the electric vehicle further comprises a ground socket, one end of the ground socket being configured to connect to a ground plug of the liquid cooling gun, the other end of the ground socket being connected to a vehicle body ground platform, the liquid cooling connection confirmation socket comprising a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, the liquid cooling connection confirmation plug comprising a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug;

the vehicle end connection confirmation circuit comprises a third vehicle end connection confirmation circuit and a fourth vehicle end connection confirmation circuit, the third vehicle end connection confirmation circuit comprises a fifth resistor and a third voltage source, the first liquid cooling connection confirmation socket is connected with the third voltage source through the fifth resistor, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform;

The pile end connection confirmation circuit comprises a wire, and the first liquid cooling connection confirmation plug is connected with the second liquid cooling connection confirmation plug through the wire;

10. The control and steering circuit of claim 9, wherein the voltage at the detection point between the fifth resistor and the first liquid-cooled connection confirmation receptacle reaches a third predetermined value indicating successful connection of the liquid-cooled plug to the liquid-cooled receptacle.

11. The control guidance circuit of claim 1, wherein the electric vehicle further comprises a ground socket, one end of the ground socket being configured to connect to a ground plug of the liquid cooling gun, the other end of the ground socket being connected to a vehicle body ground platform, the liquid cooling connection confirmation socket comprising a first liquid cooling connection confirmation socket and a second liquid cooling connection confirmation socket, the liquid cooling connection confirmation plug comprising a first liquid cooling connection confirmation plug and a second liquid cooling connection confirmation plug;

the vehicle end connection confirmation circuit comprises a fifth vehicle end connection confirmation circuit and a sixth vehicle end connection confirmation circuit, the fifth vehicle end connection confirmation circuit comprises a fourth voltage source, the sixth vehicle end connection confirmation circuit comprises a sixth resistor, the first liquid cooling connection confirmation socket is connected with the fourth voltage source, and the second liquid cooling connection confirmation socket is connected with the vehicle body ground platform through the sixth resistor;

12. The control and steering circuit of claim 11, wherein the voltage at the detection point between the sixth resistor and the second liquid-cooled connection confirmation receptacle reaches a fourth predetermined value indicating that the liquid-cooled plug and liquid-cooled receptacle are successfully connected.

13. The control pilot circuit of any one of claims 1 to 12, wherein the control pilot circuit further comprises a communication circuit, the liquid cooling apparatus further comprises a communication plug, and the vehicle outlet further comprises a communication outlet;

the communication circuit comprises a first communication circuit positioned on the liquid cooling equipment and a second communication circuit positioned on the electric vehicle, one end of the first communication circuit is connected with the controller of the liquid cooling equipment, the other end of the first communication circuit is connected with the communication plug, one end of the second communication circuit is connected with the controller of the electric vehicle, and the other end of the second communication circuit is connected with the communication socket.

14. The control pilot circuit of any one of claims 1 to 13 wherein the control pilot circuit further comprises an auxiliary power circuit, the liquid cooling apparatus further comprises an auxiliary power plug, and the vehicle outlet further comprises an auxiliary power outlet;

the auxiliary power supply circuit comprises a first auxiliary power supply circuit located on the liquid cooling device and a second auxiliary power supply circuit located on the electric vehicle, one end of the first auxiliary power supply circuit is connected with the controller of the liquid cooling device, the other end of the first auxiliary power supply circuit is connected with the auxiliary power supply plug, one end of the second auxiliary power supply circuit is connected with the controller of the electric vehicle, and the other end of the second auxiliary power supply circuit is connected with the auxiliary power supply socket.