Electric vehicle discharge management circuit and apparatus

Abstract

The application discloses a kind of electric vehicle discharge management circuit and device, it is related to electric vehicle discharge management technical field, electric vehicle discharge management circuit includes: control module, at least one control signal is generated, and control signal is exported;Discharge matching module is connected with control module and the power battery of electric vehicle respectively, power battery is also connected with power consumption interface, discharge matching module is used to export at least one matching signal to power battery according to at least one control signal, so that power battery according to target matching signal in at least one matching signal, discharge voltage output by power battery is accessed to power consumption interface.The application controls the power battery of electric vehicle, when receiving target matching signal in different matching signal, starts to discharge externally through user interface, so that electric vehicle can realize the function of discharging externally without using dedicated discharge gun, solve the technical problem that the applicability of the function of discharging externally of electric vehicle is low.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle discharge management technology, and in particular to an electric vehicle discharge management circuit and device. Background Technology

[0002] With the increasing popularity of electric vehicles, in practical use, when emergency power is needed outdoors, electric vehicles can serve as a good energy storage device, providing stable power through a discharge gun to meet people's temporary outdoor power needs.

[0003] However, there are many brands and models of electric vehicles on the market, and each type of electric vehicle has a different protocol for external discharge. Therefore, different electric vehicles need to be equipped with special discharge guns to realize the external discharge function, resulting in low applicability of the external discharge function of electric vehicles. Summary of the Invention

[0004] The main objective of this invention is to provide an electric vehicle discharge management circuit and device, which aims to solve the technical problem of low applicability of the external discharge function of existing electric vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides an electric vehicle discharge management circuit, the electric vehicle discharge management circuit comprising:

[0007] A control module is used to generate at least one control signal and output the control signal.

[0008] The discharge matching module is connected to the control module and the power battery of the electric vehicle. The power battery is also connected to the power interface. The discharge matching module is used to output at least one matching signal to the power battery according to at least one control signal, so that the power battery connects the discharge voltage output by the power battery to the power interface according to the target matching signal in the at least one matching signal.

[0009] Optionally, the discharge matching module includes a first matching unit, a second matching unit, and a third matching unit;

[0010] The control module is used to generate a first control signal, a second control signal, and a third control signal, and to output the first control signal, the second control signal, and the third control signal.

[0011] The first matching unit is used to output a first matching signal according to the first control signal;

[0012] The second matching unit is used to output a second matching signal according to the second control signal;

[0013] The third matching unit is used to output the third matching signal according to the third control signal;

[0014] This allows the power battery to determine the target matching signal from the first matching signal, the second matching signal, and the third matching signal, and to connect the discharge voltage to the power interface according to the target matching signal.

[0015] Optionally, the electric vehicle discharge management circuit also includes:

[0016] The power supply module is connected to both the control module and the discharge matching module, and is used to supply power to both modules.

[0017] Optionally, the power module includes:

[0018] Battery unit;

[0019] The power supply management unit is connected to the battery unit, the control module, and the discharge matching module, respectively, and is used to control the battery unit to supply power to the control module and the discharge matching module.

[0020] Optionally, the electric vehicle discharge management circuit also includes:

[0021] The voltage conversion module is connected to the power interface, the control module, and the discharge matching module respectively. It is used to convert the discharge voltage, output a first voltage to power the control module and the discharge matching module, and output a second voltage.

[0022] The control module is also used to generate a power supply switching signal based on the second voltage and output the power supply switching signal to the power supply management unit;

[0023] The power supply management unit is also used to control the battery unit to stop supplying power to the control module and the discharge matching module according to the power supply switching signal.

[0024] Optionally, the electric vehicle discharge management circuit also includes:

[0025] The charging management module is connected to both the voltage conversion module and the battery unit, and is used to charge the battery unit according to the second voltage.

[0026] Optionally, the control module includes a microcontroller U3;

[0027] The seventh pin of microcontroller U3 is connected to one end of resistor R9 and one end of capacitor C4. The other end of resistor R9 is connected to the power management unit and the voltage conversion module. The other end of capacitor C4 is grounded. The eighth pin of microcontroller U3 is connected to the ninth pin of microcontroller U3, one end of capacitor C3, the power management unit, and the voltage conversion module. The other end of capacitor C3 and the tenth pin of microcontroller U3 are both grounded. The thirteenth pin of microcontroller U3 is connected to the power management unit. The fourteenth pin of microcontroller U3 is connected to the first matching unit. The fifteenth pin of microcontroller U3 is connected to the second matching unit. The sixteenth pin of microcontroller U3 is connected to the third matching unit. The seventeenth pin of microcontroller U3 is connected to the voltage conversion module through resistor R10.

[0028] Optionally, the first matching unit includes a relay K2 and a resistor R3;

[0029] The first pin of relay K2 is connected to the collector of transistor Q1 and the anode of diode D3. The base of transistor Q1 is connected to the fourteenth pin of microcontroller U3 through resistor R6. The cathode of diode D3 and the second pin of relay K1 are connected to the power management unit and voltage conversion module. The emitter of transistor Q1 is grounded. The fifth pin of relay K2 is connected to the power battery. The sixth pin of relay K1 is connected to the power battery through resistor R3.

[0030] Optionally, the power management unit includes transistor Q4 and relay K4;

[0031] The base of transistor Q4 is connected to pin 13 of microcontroller U3 via resistor R16. The emitter of transistor Q4 is grounded. The collector of transistor Q4 is connected to pin 1 of relay K4 and the anode of diode D7. The cathode of diode D7, pins 2 and 5 of relay K4 are connected to the battery cell. Pin 6 of relay K4 is connected to the anode of diode D6. The cathode of diode D6 is connected to the other end of resistor R9, pin 8 of microcontroller U3, pins 2 of relay K2, pins 2 of relay K1, and pins 2 of relay K3.

[0032] In a second aspect, the present invention also provides an electric vehicle discharge management device, the electric vehicle discharge management device comprising:

[0033] Power interface;

[0034] The electric vehicle discharge management circuit described above is connected to the electric vehicle's power battery and power interface, respectively.

[0035] This invention provides an electric vehicle discharge management circuit and device, which generates at least one control signal through a control module and outputs the control signal; and outputs at least one matching signal to the power battery through a discharge matching module according to the at least one control signal, so that the power battery connects the discharge voltage output by the power battery to the power interface according to the target matching signal in the at least one matching signal.

[0036] Therefore, this invention controls the discharge matching module to output different matching signals. When the electric vehicle's power battery receives the target matching signal among the different matching signals, the power battery begins to discharge to the outside through the user interface. This allows the electric vehicle to achieve the function of external discharge without the need for a dedicated discharge gun, thus solving the technical problem of low applicability of the external discharge function of electric vehicles. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the electric vehicle discharge management circuit according to Embodiment 1 of the present invention;

[0039] Figure 2 for Figure 1 Circuit schematic diagram of the control module;

[0040] Figure 3 for Figure 1 Circuit schematic of the discharge matching module;

[0041] Figure 4 This is a schematic diagram of the electric vehicle discharge management circuit according to Embodiment 2 of the present invention;

[0042] Figure 5 for Figure 4 Circuit schematic diagram of the power supply management unit;

[0043] Figure 6 for Figure 4 Circuit schematic diagram of the medium voltage conversion module;

[0044] Figure 7 for Figure 4 Circuit diagram of the charging management module.

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0047] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0048] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that an apparatus or method comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an apparatus or method. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the apparatus or method that includes that element.

[0049] Furthermore, in this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. If the embodiments of this invention involve descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0050] In this invention, the suffixes such as "module," "component," or "unit" used to denote elements are used only for illustrative purposes and have no specific meaning in themselves. Therefore, "module," "component," or "unit" can be used interchangeably. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0051] In view of the technical problem that the external discharge function of electric vehicles is not widely applicable in the prior art, the present invention provides an electric vehicle discharge management circuit, the overall concept of which is as follows:

[0052] The electric vehicle discharge management circuit includes: a control module for generating at least one control signal and outputting the control signal; and a discharge matching module connected to the control module and the electric vehicle's power battery, the power battery also being connected to a power interface. The discharge matching module is used to output at least one matching signal to the power battery according to at least one control signal, so that the power battery connects the discharge voltage output by the power battery to the power interface according to the target matching signal in the at least one matching signal.

[0053] This invention provides an electric vehicle discharge management circuit. By controlling the discharge matching module to output different matching signals, when the electric vehicle's power battery receives the target matching signal among the different matching signals, the power battery begins to discharge externally through the user interface. This allows the electric vehicle to achieve external discharge function without the need for a dedicated discharge gun, solving the technical problem of low applicability of the external discharge function of electric vehicles. Furthermore, the electric vehicle discharge management circuit of this invention is used in conjunction with the discharge gun, improving the versatility of the discharge gun.

[0054] The electric vehicle discharge management circuit and device used in the technical implementation of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments:

[0055] Example 1

[0056] Reference Figures 1 to 3 , Figure 1 This is a schematic diagram of the electric vehicle discharge management circuit according to Embodiment 1 of the present invention. Figure 2 for Figure 1 The circuit schematic of the control module. Figure 3 for Figure 1 The circuit schematic of the discharge matching module; this embodiment provides an electric vehicle discharge management circuit, which includes:

[0057] A control module is used to generate at least one control signal and output the control signal.

[0058] The discharge matching module is connected to the control module and the power battery of the electric vehicle. The power battery is also connected to the power interface. The discharge matching module is used to output at least one matching signal to the power battery according to at least one control signal, so that the power battery connects the discharge voltage output by the power battery to the power interface according to the target matching signal in the at least one matching signal.

[0059] In this embodiment, the control module can be connected to the discharge gun of the electric vehicle. The discharge gun is equipped with a discharge button. When the discharge gun is plugged into an electric vehicle with discharge function, the electric vehicle discharge management circuit is connected to the vehicle end through the discharge gun. When the user manually presses the discharge button on the discharge gun, the control module powers on and starts working, generating at least one control signal and outputting at least one control signal to the discharge matching module. The discharge matching module is also connected to the discharge gun and is connected to the vehicle end through the discharge gun, outputting at least one matching signal to the vehicle end. The target matching signal is a matching signal that conforms to the discharge rules set by the vehicle end. After the discharge gun is plugged into an electric vehicle with discharge function, the vehicle end can recognize at least one matching signal. When the vehicle end recognizes the target matching signal, it controls the power battery to discharge externally through the discharge gun and supplies power to electrical devices through the user interface. The power interface includes a power strip, which can connect different types of electrical devices.

[0060] In practice, after the discharge gun is inserted into an electric vehicle with discharge function, the user presses a physical button, the control module starts working, generates at least one control signal, and outputs the at least one control signal; the discharge matching module outputs at least one matching signal to the vehicle end according to the at least one control signal, so that when the vehicle end recognizes the target matching signal in the at least one matching signal, it controls the power battery to discharge to the outside through the discharge gun and supplies power to the electrical equipment through the user interface.

[0061] Specifically, the discharge matching module includes a first matching unit, a second matching unit, and a third matching unit;

[0062] The control module is used to generate a first control signal, a second control signal, and a third control signal, and to output the first control signal, the second control signal, and the third control signal.

[0063] The first matching unit is used to output a first matching signal according to the first control signal;

[0064] The second matching unit is used to output a second matching signal according to the second control signal;

[0065] The third matching unit is used to output the third matching signal according to the third control signal;

[0066] This allows the power battery to determine the target matching signal from the first matching signal, the second matching signal, and the third matching signal, and to connect the discharge voltage to the power interface according to the target matching signal.

[0067] In this embodiment, the first matching unit, the second matching unit, and the third matching unit are used to output a first matching signal, a second matching signal, and a third matching signal that conform to the discharge rules formulated for three types of electric vehicles. The discharge matching module may also include more or fewer matching units, which are used to output matching signals for different electric vehicle discharge rules according to different control signals. That is, the number of matching units can be set according to actual usage needs, and the number of control signals and the number of matching signals are the same as the number of matching units.

[0068] In actual use, after the control module is powered on, it can output the first control signal, the second control signal, and the third control signal in a preset order. The discharge matching module outputs the first matching signal, the second matching signal, and the third matching signal to the vehicle end through the discharge gun in sequence according to the first control signal, the second control signal, and the third control signal. The vehicle end recognizes the first matching signal, the second matching signal, and the third matching signal in sequence. When the target matching signal is recognized, the control module continues to output the control signal corresponding to the target matching signal, so that the discharge matching module can continue to output the target matching signal to the vehicle end, enabling the vehicle end to control the power battery to discharge externally. The preset order of the control module outputting the first control signal, the second control signal, and the third control signal can be set according to actual usage requirements.

[0069] In practice, after the discharge gun is inserted into an electric vehicle with discharge capability, the user presses a physical button, and the control module starts working, generating and outputting a first control signal. The first matching unit, based on the first control signal, outputs a first matching signal to the vehicle, allowing the vehicle to identify whether the first matching signal conforms to the electric vehicle's discharge rules. If the first matching signal conforms to the electric vehicle's discharge rules, the control module continues to output the first control signal, the first matching unit continues to output the first matching signal, and the vehicle controls the power battery to discharge externally through the discharge gun based on the first matching signal. If the first matching signal does not conform to the electric vehicle's discharge rules, the control module generates and outputs a second control signal. The second matching unit outputs a second matching signal to the vehicle end based on the second control signal, so that the vehicle end can identify whether the second matching signal conforms to the discharge rules of the electric vehicle. If the second matching signal conforms to the discharge rules of the electric vehicle, the control module continues to output the second control signal, the second matching unit continues to output the second matching signal based on the second control signal, and the vehicle end controls the power battery to discharge externally through the discharge gun based on the second matching signal. If the second matching signal does not conform to the discharge rules of the electric vehicle, the control module generates a third control signal and outputs the third control signal. The third matching unit outputs the third matching signal to the vehicle end based on the third control signal, and the vehicle end controls the power battery to discharge externally through the discharge gun based on the third matching signal.

[0070] Specifically, such as Figure 2 As shown, the control module includes a microcontroller U3;

[0071] Pin 7 of microcontroller U3 is connected to one end of resistor R9 and one end of capacitor C4. The other end of resistor R9 is connected to the power management unit and the voltage conversion module. The other end of capacitor C4 is grounded. Pin 8 of microcontroller U3 is connected to pin 9 of microcontroller U3, one end of capacitor C3, the power management unit, and the voltage conversion module. The other end of capacitor C3 and pin 10 of microcontroller U3 are both grounded. Pin 13 of microcontroller U3 is connected to the power management unit. Pin 14 of microcontroller U3 is connected to the first matching unit. Pin 15 of microcontroller U3 is connected to the second matching unit. Pin 16 of microcontroller U3 is connected to the third matching unit. Pin 17 of microcontroller U3 is connected to the voltage conversion module through resistor R10.

[0072] In this embodiment, both the power supply management unit and the voltage conversion module are used to supply power to the microcontroller U3. Before the power battery discharges externally, the power supply management unit supplies power to the microcontroller U3. After the power battery starts discharging externally, the voltage conversion module converts the discharge voltage of the power battery into a first voltage, POWER, to supply power to the microcontroller U3. In addition, the voltage conversion module also converts the discharge voltage into a second voltage, +5V, which is input to the microcontroller U3 through resistor R10. When the seventeenth pin of the microcontroller U3 detects the second voltage, +5V, it generates a power supply switching signal to control the power supply management unit to stop supplying power to the microcontroller U3. The microcontroller U3 includes a single-chip microcomputer of model STC8H1K08S2. The eleventh pin 11 and the twelfth pin 12 of the microcontroller U3 are also connected to the program download interface for downloading the electric vehicle discharge management program.

[0073] In practice, after the discharge gun is inserted into an electric vehicle with discharge function, the user presses the physical button, and the microcontroller U3 is powered on and starts working. It generates the first control signal P33, the second control signal P34 and the third control signal P35 in sequence, and outputs the first control signal P33, the second control signal P34 and the third control signal P35 to the first matching unit, the second matching unit and the third matching unit in sequence.

[0074] Specifically, such as Figure 3 As shown, the first matching unit includes a relay K2 and a resistor R3;

[0075] The first pin 1 of relay K2 is connected to the collector of transistor Q1 and the positive terminal of diode D3, respectively. The base of transistor Q1 is connected to the fourteenth pin 14 of microcontroller U3 through resistor R6. The negative terminal of diode D3 and the second pin 2 of relay K2 are both connected to the power management unit and the voltage conversion module. The emitter of transistor Q1 is grounded. The fifth pin 5 of relay K2 is connected to the power battery. The sixth pin 6 of relay K2 is connected to the power battery through resistor R3.

[0076] In this embodiment, the circuit principles of the second matching unit and the third matching unit are the same as those of the first matching unit, such as... Figure 3 As shown, the second matching unit includes a relay K3 and a resistor R4; the first pin 1 of the relay K3 is connected to the collector of the transistor Q2 and the positive terminal of the diode D4 respectively; the base of the transistor Q2 is connected to the fifteenth pin 15 of the microcontroller U3 through the resistor R7; the negative terminal of the diode D4 and the second pin 2 of the relay K3 are both connected to the power management unit and the voltage conversion module; the emitter of the transistor Q2 is grounded; the fifth pin 5 of the relay K3 is connected to the power battery; and the sixth pin 6 of the relay K3 is connected to the power battery through the resistor R4.

[0077] The third matching unit includes a relay K1 and a resistor R5; the first pin 1 of the relay K1 is connected to the collector of transistor Q3 and the positive terminal of diode D5 respectively; the base of transistor Q3 is connected to the sixteenth pin 16 of microcontroller U3 through resistor R8; the negative terminal of diode D5 and the second pin 2 of the relay K1 are both connected to the power management unit and the voltage conversion module; the emitter of transistor Q3 is grounded; the fifth pin 5 of the relay K1 is connected to the power battery; and the sixth pin 6 of the relay K1 is connected to the power battery through resistor R5.

[0078] It should be noted that different brands of electric vehicles discharge externally by identifying whether the resistance value of the discharge resistor connected to the discharge control pin CC of the discharge gun meets the discharge resistance requirements specified for the electric vehicle. Therefore, in actual use, the fifth pin 5 of relays K1, K2, and K3 are all connected to the control pin CC of the discharge gun. The sixth pin 6 of relay K1 is connected to the ground pin CC-1 of the discharge gun through resistor R5, the sixth pin 6 of relay K2 is connected to resistor R3, and the sixth pin 6 of relay K3 is connected to resistor R4. When the microcontroller U3 sequentially outputs the first control signal P33, the second control signal P34, and the third control signal P35, relays K2, K3, and K1 close sequentially, connecting resistors R3, R4, and R5 to the vehicle end, so that the vehicle end can determine whether resistors R3, R4, and R5 are connected to the ground pin CC-1. Whether the resistance value of any one of the five resistors meets the discharge resistance value requirements specified by the vehicle end; among them, the resistance value of resistor R3 is 2.7KΩ, the resistance value of resistor R2 is 2KΩ, and the resistance value of resistor R4 is 1KΩ. In actual use, the resistance values ​​of resistor R3, resistor R2, and resistor R4 can also be set according to actual usage requirements. Relays K1, K2, and K3 can all be relays of model APAN3112. Diodes D3, D4, and D5 can all be Schottky diodes of model SS14_C3034068. Transistors Q1, Q2, and Q3 can all be transistors of model SS8050_C2926167.

[0079] In this embodiment, the power supply management unit and the voltage conversion module are also used to supply power to relays K1, K2 and K3. Before the power battery discharges to the outside, the power supply management unit supplies power to relays K1, K2 and K3. After the power battery starts to discharge to the outside, the voltage conversion module converts the discharge voltage of the power battery into the first voltage POWER to supply power to relays K1, K2 and K3.

[0080] This embodiment provides an electric vehicle discharge management circuit. By sequentially controlling the closure of multiple relays, resistors with different resistance values ​​are connected to the vehicle end in sequence. When the vehicle end recognizes a discharge resistance value that conforms to the vehicle end's discharge rules, it controls the power battery to start discharging externally through the user interface. This allows electric vehicles to achieve external discharge function without the need for a dedicated discharge gun, solving the technical problem of low applicability of the external discharge function of electric vehicles.

[0081] Example 2

[0082] Furthermore, refer to Figures 4 to 7 , Figure 4 This is a schematic diagram of the electric vehicle discharge management circuit according to Embodiment 2 of the present invention. Figure 5 for Figure 4 Circuit schematic diagram of the power supply management unit. Figure 6 for Figure 4 Circuit schematic of the medium voltage conversion module. Figure 7 for Figure 4 The circuit schematic of the charging management module; based on the above embodiment one, this embodiment provides an electric vehicle discharge management circuit, which further includes:

[0083] The power supply module is connected to both the control module and the discharge matching module, and is used to supply power to both modules.

[0084] In this embodiment, the power module is a DC power supply, used to supply power to the control module and the discharge matching module before the power battery discharges.

[0085] Specifically, such as Figure 4 As shown, the electric vehicle discharge management circuit also includes:

[0086] The voltage conversion module is connected to the power interface, the control module, and the discharge matching module respectively. It is used to convert the discharge voltage, output a first voltage to power the control module and the discharge matching module, and output a second voltage.

[0087] The control module is also used to generate a power supply switching signal based on the second voltage and output the power supply switching signal to the power supply management unit;

[0088] The power supply management unit is also used to control the battery unit to stop supplying power to the control module and the discharge matching module according to the power supply switching signal.

[0089] In this embodiment, the voltage conversion module is connected to the power interface. After receiving the discharge voltage from the power interface, it converts the discharge voltage and outputs a first voltage to power the control module and the discharge matching module. It also outputs a second voltage to the control module so that the control module controls the power supply management unit to stop controlling the battery unit to stop supplying power to the control module and the discharge matching module according to the second voltage.

[0090] Specifically, the power module includes:

[0091] Battery unit;

[0092] The power supply management unit is connected to the battery unit, the control module, and the discharge matching module, respectively, and is used to control the battery unit to supply power to the control module and the discharge matching module.

[0093] In this embodiment, the power supply management unit is also connected to the physical button of the charging gun. When the physical button is pressed, the control battery unit starts to supply power to the control module and the discharge matching module.

[0094] Specifically, the power supply management unit includes transistor Q4 and relay K4;

[0095] The base of transistor Q4 is connected to pin 13 of microcontroller U3 via resistor R16. The emitter of transistor Q4 is grounded. The collector of transistor Q4 is connected to pin 1 of relay K4 and the anode of diode D7. The cathode of diode D7, pin 2 of relay K4, and pin 5 of relay K4 are all connected to the battery cell. Pin 6 of relay K4 is connected to the anode of diode D6. The cathode of diode D6 is connected to the other end of resistor R9, pin 8 of microcontroller U3, pin 2 of relay K2, pin 2 of relay K1, and pin 2 of relay K3.

[0096] In this embodiment, during actual use, after the discharge gun is inserted into an electric vehicle with a discharge function, the user presses the physical button, and transistor Q4 is turned on. The output voltage BAT+ of the battery unit is connected to diode D6 through relay K4. Diode D6 is then connected to the other end of resistor R9, pin 8 of microcontroller U3, pin 2 of relay K2, pin 2 of relay K1, and pin 2 of relay K3, respectively, thus supplying power to microcontroller U3, relay K1, relay K2, and relay K3. When microcontroller U3 detects the second voltage +5V, it outputs a power supply switching signal P32 to control transistor Q4 to turn off, supplying power to microcontroller U3, relay K1, relay K2, and relay K3 through the voltage conversion module. Relay K4 can be a relay of model APAN3112, and diodes D6 and D7 can both be Schottky diodes of model SS14_C3034068.

[0097] Specifically, such as Figure 6As shown, the voltage conversion module includes a voltage conversion chip U2. The first pin 1 of the voltage conversion chip U2 is connected to one end of resistor R1 and one end of potentiometer R2. The other end of resistor R1 is connected to the third pin 3 of power interface P2 via fuse U1. The other end of potentiometer R2 is connected to the second pin 2 of power interface P2 and the second pin 2 of voltage conversion chip U2. The first pin 1 of power interface P2 is grounded to GND via resistor U5 and capacitor C1. The fourth pin 4 of the voltage conversion chip U2 is connected to one end of capacitor C7, the negative terminal of filter capacitor C2, and the positive terminal of Zener diode D2. The fifth pin 5 of the voltage conversion chip U2 is connected to capacitor C7... The other end of the circuit is connected to the positive terminal of the filter capacitor C2, the negative terminal of the Zener diode D2, and the positive terminal of the diode D1. The negative terminal of the diode D1 is connected to the control module and the discharge matching module respectively. The output first voltage POWER supplies power to the control module and the discharge matching module. The fifth pin 5 of the voltage conversion chip U2 is also connected to the control module, outputting the second voltage +5V to the control module. Among them, the voltage conversion chip U2 includes a voltage conversion chip of model LD05-23B05R2, the diode D1 includes a switching diode of model PMLL4148L,115, and the Zener diode D2 includes a transient suppression diode of model SMBJ7.0A_C693613.

[0098] Specifically, such as Figure 4 As shown, the electric vehicle discharge management circuit also includes:

[0099] The charging management module is connected to both the voltage conversion module and the battery unit, and is used to charge the battery unit according to the second voltage.

[0100] In this embodiment, as Figure 7 As shown, the charging management module includes a charging management chip U4. The first pin 1 of the charging management chip U4 is connected to one end of resistor R12 and one end of resistor R14. The other end of resistor R12 is connected to one end of resistor R11, one end of capacitor C5, and the fifth pin 5 of voltage conversion chip U2. The other end of resistor R11 is connected to the fifth pin 5 of voltage conversion chip U2. The other ends of capacitor C5 and resistor R14 are both grounded to GND. The second pin 2 of the charging management chip U4 is grounded to GND through resistor R15. The third pin 3 of the charging management chip U4 is grounded to GND. The fourth pin 4 and the eighth pin 8 of the charging management chip U4 are both connected to the fifth pin 5 of voltage conversion chip U2. The fifth pin 5 of the charging management chip U4 is connected to the sixth pin 6 of relay K4 and one end of capacitor C6. The other end of capacitor C6 is grounded. The charging management chip U4 can be a TC4056A model.

[0101] Specifically, such as Figure 7As shown, the electric vehicle discharge management circuit also includes:

[0102] The status indication module, connected to the charging management module, is used to indicate the charging status and charging completion status of the battery unit based on the status indication signal output by the charging management module.

[0103] In this embodiment, the status indication module includes LED1 and LED2. The positive terminal of LED1 is connected to pin 5 of voltage conversion chip U2, and the negative terminal of LED1 is connected to pin 7 of charging management chip U4 through resistor R13, for receiving status indication signals to indicate the charging status of the battery unit. The positive terminal of LED2 is connected to pin 5 of voltage conversion chip U2, and the negative terminal of LED2 is connected to pin 6 of charging management chip U4 through resistor R17, for receiving status indication signals to indicate the charging completion status of the battery unit. LED1 includes LED-0603_R, and LED2 includes LED-0603_G.

[0104] This embodiment provides an electric vehicle discharge management circuit. Before the electric vehicle starts discharging externally, the battery supplies power to each module in the electric vehicle discharge management circuit. After the electric vehicle starts discharging externally, the discharge voltage of the electric vehicle supplies power to each module in the electric vehicle discharge management circuit. During the process of the electric vehicle discharging externally, the battery's electrical energy is saved, which can improve the battery's service life. Furthermore, when the battery's power is insufficient, the electric vehicle discharges externally to charge the battery, which improves the applicability of the electric vehicle discharge management circuit.

[0105] Example 3

[0106] Based on the same inventive concept, this embodiment provides an electric vehicle discharge management device, which includes:

[0107] Power interface;

[0108] The electric vehicle discharge management circuit described above is connected to the electric vehicle's power battery and power interface, respectively.

[0109] In this embodiment, the electric vehicle discharge management device includes a circuit board, and the electric vehicle discharge management circuit is disposed on the circuit board. In actual use, the electric vehicle discharge management circuit is connected to the universal discharge gun of the electric vehicle. After the discharge gun is inserted into the electric vehicle with discharge function, the electric vehicle discharge management circuit can automatically identify the electric vehicle model, so that the electric vehicle can realize the external discharge function through the discharge gun, thereby improving the versatility of the ordinary discharge gun.

[0110] It should be noted that the specific structure of the electric vehicle discharge management circuit refers to Embodiment 1 or 2 above. Since this embodiment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0111] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A discharge management circuit for an electric vehicle, characterized in that, The electric vehicle discharge management circuit includes: A control module is used to generate at least one control signal and output the control signal; A discharge matching module is connected to the control module and the power battery of the electric vehicle, respectively. The power battery is also connected to the power interface. The discharge matching module is used to output at least one matching signal to the power battery according to the at least one control signal, so that the power battery connects the discharge voltage output by the power battery to the power interface according to the target matching signal in the at least one matching signal. The discharge matching module includes at least a first matching unit, a second matching unit, and a third matching unit; The control module is used to generate a first control signal, a second control signal, and a third control signal in a preset order, and to output the first control signal, the second control signal, and the third control signal in sequence. The first matching unit is configured to output a first matching signal according to the first control signal; The second matching unit is used to output a second matching signal according to the second control signal; The third matching unit is used to output a third matching signal according to the third control signal; This allows the power battery to determine the target matching signal from the first matching signal, the second matching signal, and the third matching signal, and to connect the discharge voltage to the power interface according to the target matching signal.

2. The electric vehicle discharge management circuit as described in claim 1, characterized in that, The electric vehicle discharge management circuit also includes: The power supply module is connected to both the control module and the discharge matching module, and is used to supply power to both the control module and the discharge matching module.

3. The electric vehicle discharge management circuit as described in claim 2, characterized in that, The power module includes: Battery unit; The power supply management unit is connected to the battery unit, the control module, and the discharge matching module, respectively, and is used to control the battery unit to supply power to the control module and the discharge matching module.

4. The electric vehicle discharge management circuit as described in claim 3, characterized in that, The electric vehicle discharge management circuit also includes: A voltage conversion module is connected to the power interface, the control module, and the discharge matching module, respectively, and is used to convert the discharge voltage, output a first voltage to power the control module and the discharge matching module, and output a second voltage. The control module is further configured to generate a power supply switching signal based on the second voltage, and output the power supply switching signal to the power supply management unit; The power supply management unit is also used to control the battery unit to stop supplying power to the control module and the discharge matching module according to the power supply switching signal.

5. The electric vehicle discharge management circuit as described in claim 4, characterized in that, The electric vehicle discharge management circuit further includes: The charging management module is connected to both the voltage conversion module and the battery unit, and is used to charge the battery unit according to the second voltage.

6. The electric vehicle discharge management circuit as described in claim 5, characterized in that, The control module includes a microcontroller U3; The seventh pin of the microcontroller U3 is connected to one end of resistor R9 and one end of capacitor C4. The other end of resistor R9 is connected to the power supply management unit and the voltage conversion module. The other end of capacitor C4 is grounded. The eighth pin of the microcontroller U3 is connected to the ninth pin of the microcontroller U3, one end of capacitor C3, the power supply management unit, and the voltage conversion module. The other end of capacitor C3 and the tenth pin of the microcontroller U3 are both grounded. The thirteenth pin of the microcontroller U3 is connected to the power supply management unit. The fourteenth pin of the microcontroller U3 is connected to the first matching unit. The fifteenth pin of the microcontroller U3 is connected to the second matching unit. The sixteenth pin of the microcontroller U3 is connected to the third matching unit. The seventeenth pin of the microcontroller U3 is connected to the voltage conversion module through resistor R10.

7. The electric vehicle discharge management circuit as described in claim 6, characterized in that, The first matching unit includes a relay K2 and a resistor R3; The first pin of relay K2 is connected to the collector of transistor Q1 and the anode of diode D3, respectively. The base of transistor Q1 is connected to the fourteenth pin of microcontroller U3 through resistor R6. The cathode of diode D3 and the second pin of relay K2 are connected to the power supply management unit and the voltage conversion module. The emitter of transistor Q1 is grounded. The fifth pin of relay K2 is connected to the power battery. The sixth pin of relay K2 is connected to the power battery through resistor R3.

8. The electric vehicle discharge management circuit as described in claim 7, characterized in that, The power supply management unit includes transistor Q4 and relay K4; The base of transistor Q4 is connected to the thirteenth pin of microcontroller U3 through resistor R16. The emitter of transistor Q4 is grounded. The collector of transistor Q4 is connected to the first pin of relay K4 and the anode of diode D7. The cathode of diode D7, the second pin and the fifth pin of relay K4 are all connected to the battery unit. The sixth pin of relay K4 is connected to the anode of diode D6. The cathode of diode D6 is connected to the other end of resistor R9, the eighth pin of microcontroller U3, the second pin of relay K2, the second pin of relay K1, and the second pin of relay K3.

9. A discharge management device for electric vehicles, characterized in that, The electric vehicle discharge management device includes: Power interface; The electric vehicle discharge management circuit as described in any one of claims 1 to 8 is connected to the power battery of the electric vehicle and the power interface, respectively.

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