Discharging system of electric automobile and electric automobile

Abstract

The invention discloses an electric vehicle discharging system and an electric vehicle. The discharging system comprises a battery, a connecting base, a BMS, a detection module and a control module. The connecting seat is electrically connected with the battery and is used for being electrically connected with a load; the BMS is used for acquiring the electric quantity and temperature of the battery; the detection module comprises a temperature sensor and a galvanometer, the temperature sensor is used for detecting the temperature of the connecting seat, and the galvanometer is used for detecting current flowing through the load; and the control module is used for controlling whether the battery supplies power to the load or not based on an acquisition result of the BMS and detection results of the temperature sensor and the galvanometer. According to the embodiment of the invention, the process of discharging the load by the battery can be ensured to be always safely carried out.

Description

Technical Field

[0001] The present disclosure relates to the technical field of new energy vehicles, and particularly to an electric vehicle discharging system and an electric vehicle. Background Art

[0002] With the development and popularization of electric vehicles, users' requirements for the functions of electric vehicles are increasing day by day.

[0003] In related technologies, some electric vehicles have the ability to discharge externally. In specific scenarios such as mobile office, users can connect electrical devices to these electric vehicles to supply power to the electrical devices through these electric vehicles.

[0004] However, the safety of related technology electric vehicles during discharging still needs to be improved. Summary of the Invention

[0005] Embodiments of the present disclosure provide an electric vehicle discharging system and an electric vehicle, which can solve the above technical problems existing in related technologies. The technical solutions are as follows:

[0006] In a first aspect, an electric vehicle discharging system is provided. The discharging system includes a battery, a connection socket, a BMS (Battery Management System), a detection module, and a control module;

[0007] The connection socket is electrically connected to the battery and is used to be electrically connected to a load;

[0008] The BMS is used to obtain the power and temperature of the battery;

[0009] The detection module includes a temperature sensor and an ammeter. The temperature sensor is used to detect the temperature of the connection socket, and the ammeter is used to detect the current flowing through the load;

[0010] The control module is used to control whether the battery supplies power to the load based on the acquisition result of the BMS, the detection results of the temperature sensor and the ammeter.

[0011] In some possible implementation manners, the control module is used to control the battery to stop supplying power to the load when at least one of the following conditions is met: the power of the battery is lower than a specified power, the temperature of the battery is higher than a first specified temperature, the temperature of the connection socket is higher than a second specified temperature, and the current flowing through the load is higher than a specified current.

[0012] In some possible implementation manners, the BMS is further used to obtain the discharging power of the battery;

[0013] The control module is further configured to control the battery to stop powering the load when the discharge power of the battery is greater than the specified power.

[0014] In some possible implementation manners, the detection module further includes a voltmeter for detecting the voltage value of the load.

[0015] The control module is further configured to control whether the battery powers the load based on the detection result of the voltmeter.

[0016] In some possible implementation manners, the detection module further includes a voltmeter for detecting the voltage value of the load.

[0017] The control module is further configured to adjust the output power of the battery to the load based on the detection results of the voltmeter and the ammeter.

[0018] In some possible implementation manners, the discharge system further includes an input module for a user to select a discharge mode of the battery.

[0019] The control module is further configured to adjust the output power of the battery to the load based on the input information of the input module.

[0020] In some possible implementation manners, the discharge system further includes a communication module for transmitting the acquisition result of the BMS and the detection result of the detection module to a target device.

[0021] In some possible implementation manners, the discharge system further includes a reminder module.

[0022] The control module is further configured to control the reminder module to send a reminder signal when controlling the battery to stop powering the load.

[0023] In some possible implementation manners, the discharge system further includes a switch module for connecting the connection seat to the battery, and the control module is configured to control the switch module to turn off when confirming that the battery stops powering the load.

[0024] In a second aspect, an electric vehicle is provided, which includes the electric vehicle discharge system provided by the first aspect and its possible implementation manners.

[0025] The beneficial effects brought by the technical solution provided by the present disclosure at least include:

[0026] In the present disclosure, during the process of discharging a load through a battery, the power and temperature of the battery are acquired, the temperature of the connection socket and the current flowing through the load are detected, and based on the power and temperature of the battery, the temperature of the connection socket, and the current flowing through the load, it is controlled whether the battery supplies power to the load, thereby improving the safety of the process of discharging the load by the battery.

[0027] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic diagram of an electric vehicle discharging system provided by an embodiment of the present disclosure. Detailed Embodiments

[0030] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.

[0031] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The following will describe the present disclosure in detail with reference to the drawings and in combination with the embodiments.

[0032] With the development and popularization of electric vehicles, users' requirements for the functions of electric vehicles are increasing day by day.

[0033] In the related art, some electric vehicles have the ability to discharge externally. In specific scenarios such as mobile office, users can connect electrical devices to these electric vehicles to supply power to the electrical devices through these electric vehicles.

[0034] However, the safety of electric vehicles in the related art during discharging still needs to be improved.

[0035] An embodiment of the present disclosure provides an electric vehicle discharging system. The discharging system includes a battery, a connection socket, a BMS, a detection module, and a control module. The connection socket is electrically connected to the battery and is used to be electrically connected to a load. The BMS is used to acquire the power and temperature of the battery. The detection module includes a temperature sensor and an ammeter. The temperature sensor is used to detect the temperature of the connection socket, and the ammeter is used to detect the current flowing through the load. The control module is used to control whether the battery supplies power to the load based on the acquisition result of the BMS, the detection results of the temperature sensor and the ammeter.

[0036] Thus, during the process of discharging the battery to the load, the power and temperature of the battery are acquired, the temperature of the connection base and the current flowing through the load are detected, and based on the power and temperature of the battery, the temperature of the connection base, and the current flowing through the load, it is controlled whether the battery supplies power to the load, thereby improving the safety of the process of discharging the battery to the load.

[0037] Among them, BMS is the battery management system. BMS is mainly responsible for monitoring and controlling the battery state and is an essential key component of new energy vehicles. BMS is fixed on the battery.

[0038] The temperature sensor can be, for example but not limited to, a temperature-sensitive resistor. The resistance value of the temperature-sensitive resistor has a corresponding relationship with the temperature, so that the temperature of the connection base can be detected through the change in the resistance value of the temperature-sensitive resistor.

[0039] Among them, the battery vehicle further includes a power module. The power module is electrically connected between the switch and the connection base and is used to convert the direct current of the battery into alternating current for the load to use.

[0040] In some embodiments, the control module is used to control the battery to stop supplying power to the load when at least one of the following conditions is met: the power of the battery is lower than the specified power, the temperature of the battery is higher than the first specified temperature, the temperature of the connection base is higher than the second specified temperature, and the current flowing through the load is higher than the specified current.

[0041] When the power of the battery is lower than the specified power, it indicates that the power of the battery is low. To avoid interference from the load to the normal use of the electric vehicle, at this time, it is necessary to control the battery to stop supplying power to the load.

[0042] When the temperature of the battery is higher than the first specified temperature, it indicates that the temperature of the battery is too high. At this time, there is a possibility of fire or even spontaneous combustion of the battery. At this time, control the battery to stop supplying power to the load to ensure the safety during the use of the electric vehicle.

[0043] When the temperature of the connection base is higher than the second specified temperature, it indicates that the temperature of the connection base is too high and there is a possibility of fire for the connection base. At this time, control the battery to stop supplying power to the load to ensure the safety during the use of the electric vehicle.

[0044] When the current flowing through the load is higher than the specified current, there is a risk of overcurrent or even short circuit for the load. At this time, control the battery to stop supplying power to the load to ensure the safety during the use of the electric vehicle.

[0045] Among them, the word "specified" in "specified power", "first specified temperature", "second specified temperature", and "current flowing through the load" can refer to these values as being pre-set and stored in the memory, or can refer to these values as being values that can be adjusted subsequently through a program and do not change in a short period of time.

[0046] Among them, the specified power can be, for example but not limited to, 20%, 25%, 27%, 30% of the maximum battery power, and the embodiments of the present disclosure do not limit this.

[0047] In some embodiments, the BMS is also used to obtain the discharge power of the battery. The control module is also used to control the battery to stop supplying power to the load when the discharge power of the battery is greater than the specified power.

[0048] When the discharge power of the battery is greater than the specified power, it means that the electric vehicle is in a state of high-speed power consumption. At this time, if the battery supplies power to the load, it may interfere with the normal use of the electric vehicle. Therefore, the embodiments of the present disclosure will control the battery to stop supplying power to the load when the discharge power of the battery is greater than the specified power to ensure the normal use of the electric vehicle.

[0049] For example: in different driving states of the electric vehicle, the output power of the battery is different. Among them, the output power of the battery is often larger when the electric vehicle climbs a slope, and the output power of the battery is often smaller when the electric vehicle goes downhill. When climbing a slope, the control module controls the battery to stop supplying power to the load to ensure the normal driving of the electric vehicle.

[0050] In some embodiments, the detection module further includes a voltmeter, and the voltmeter is used to detect the voltage value of the load. The control module is also used to control whether the battery supplies power to the load based on the detection result of the voltmeter.

[0051] Among them, if the detection result of the voltmeter is greater than the specified voltage value, the control battery stops supplying power to the load. In this way, it is possible to prevent the voltage value applied to the load from being too large, resulting in the situation of overvoltage damage to the load, thereby greatly improving the safety of the discharge process.

[0052] Among them, the word "specified" in "specified voltage value" can refer to these values as being pre-set and stored in the memory, or can refer to these values as being values that can be adjusted subsequently through a program and do not change in a short period of time.

[0053] In some possible implementation manners, the detection module further includes a voltmeter, and the voltmeter is used to detect the voltage value of the load. The control module is also used to adjust the output power of the battery to the load based on the detection results of the voltmeter and the ammeter.

[0054] Thus, during the external power discharge of the electric vehicle, the specific power of the load can be calculated based on the detection results of the voltmeter and ammeter, so that the specific type of the load can be determined, and the output power of the battery to the load can be adjusted according to the operating power of the specific type of the load to ensure that the load operates without overloading or underloading.

[0055] In some possible implementation manners, the discharge system further includes an input module for the user to select a discharge mode of the battery. The control module is further configured to adjust the output power of the battery to the load based on the input information of the input module.

[0056] In this way, after the load is installed on the connection seat, the user can select a power supply mode of the battery to the load to adjust the output power of the battery to the load to meet different usage requirements of the user.

[0057] The embodiments of the present disclosure do not limit the discharge mode of the discharge system. Optionally, the discharge system may have, for example but not limited to, a selection of a standard discharge mode, a fast discharge mode, and an energy-saving discharge mode. Among them, in the standard discharge mode, the battery outputs a stable voltage and current to the load; in the fast discharge mode, the battery outputs a large power to the load in a short time; in the energy-saving discharge mode, the output power of the battery to the load is dynamically adjusted according to the load demand to reduce energy consumption.

[0058] In some embodiments, the discharge system further includes a communication module for transmitting the acquisition result of the BMS and the detection result of the detection module to a target device.

[0059] In this way, the user can timely learn about the state of the battery and the state of the connection seat, so as to facilitate the user to re-select the mode, thereby improving the user experience.

[0060] Optionally, the target device may be, for example but not limited to: a smart phone, a smart bracelet, a tablet computer, an MP3 (Moving Picture Experts Group Audio Layer III) player, an MP4 (Moving Picture Experts Group Audio Layer IV) player, a laptop computer.

[0061] In some embodiments, the user can also send an instruction to the communication module through the target device to send an instruction to the control module to control the entire discharge system through the target device. In this way, the convenience of the user to control the discharge system can be improved.

[0062] In some embodiments, the discharge system further includes a reminder module. The control module is further configured to control the reminder module to emit a reminder signal when controlling the battery to stop powering the load.

[0063] In this way, when the control module controls the battery to stop powering the load, it controls the reminder module to emit a reminder signal to remind the user that the connection between the load and the vehicle-mounted battery has been disconnected.

[0064] Among them, the "reminder signal" may include that the control module controls the battery to stop powering the load and the reason why the control module controls the battery to stop powering the load.

[0065] Optionally, the reminder module may be, for example but not limited to, a vehicle-mounted display screen or a vehicle-mounted speaker. Among them, when the control module controls the battery to stop powering the load, relevant information of the reminder signal will appear on some parts of the vehicle-mounted display screen and flash, and the vehicle-mounted speaker will give a voice broadcast to the user.

[0066] In some embodiments, the discharge system further includes a switch module. The switch module is used to connect the connection seat and the battery. The control module is configured to control the switch module to turn off when confirming that the battery stops powering the load.

[0067] In this way, by setting the switch module between the connection seat and the battery, the control of whether the battery powers the load can be realized through the control of the switch module.

[0068] Optionally, the switch module is a relay.

[0069] In some examples, the detection module further includes an interlock detection terminal. The interlock detection terminal is fixed to the connection seat and is used to detect whether the wiring harness between the connection seat and the battery is connected properly. The control module is further configured to control whether the battery powers the load based on the detection result of the interlock detection terminal.

[0070] In this way, it can be ensured that the connection seat and the wiring harness are connected properly, thereby avoiding the risk of electric leakage caused by the loosening of the wiring harness, and further improving the safety of the discharge system.

[0071] The control logic of the electric vehicle discharge system provided by the embodiments of the present disclosure is as follows:

[0072] First, fixedly connect the load to the connection seat.

[0073] After that, the BMS will collect the remaining power information and power information of the battery.

[0074] Among them, as long as one of the two conditions that the remaining power of the battery is lower than the specified power value and the discharge power of the battery is greater than the specified power is met, the switch module will be controlled to remain in the off state, and the battery will refuse to supply power to the battery.

[0075] When the remaining power of the battery is not less than the specified power value and the discharge power of the battery is much greater than the specified power at the same time, the control switch module is turned on.

[0076] After that, the temperature sensor will detect the temperature of the connector, the ammeter will detect the current flowing through the load, the voltmeter will detect the voltage of the load, and the BMS will also detect the remaining power and temperature of the battery in real time.

[0077] When at least one of the following conditions is met: the power of the battery is lower than the specified power, the temperature of the battery is higher than the first specified temperature, the temperature of the connector is higher than the second specified temperature, and the current flowing through the load is higher than the specified current, the switch will be turned off to stop the battery from supplying power to the load.

[0078] Otherwise, continue to supply power from the battery to the load.

[0079] In this way, at the moment when the load is connected to the connector, the remaining power information and power information of the battery will be collected first to control and determine whether the switch module is turned on, rather than simultaneously detecting the temperature of the connector through the temperature sensor, detecting the current flowing through the load through the ammeter, and detecting the voltage of the load through the voltmeter, so as to reduce the data that needs to be detected and judged, thereby saving the resources of the control module. After the switch module is turned on, while detecting the temperature of the connector through the temperature sensor, detecting the current flowing through the load through the ammeter, and detecting the voltage of the load through the voltmeter, the BMS will detect the remaining power and temperature of the battery in real time to ensure the stability of the electric vehicle discharge process, so as to avoid wasting the resources of the control module while ensuring the stable progress of the electric vehicle discharge process.

[0080] Figure 1 Shows a specific example of an electric vehicle discharge system.

[0081] In this example, the electric vehicle discharge system includes a battery, a BMS, an OBC (On-Board Charger), a connector, a T-box, a VCU (Vehicle Control Unit), a CAN (Controller Area Network), and a display screen. Among them, the BMS, OBC, T-BOX, VCU, and display screen are all electrically connected to the CAN.

[0082] Such as Figure 1As shown, the OBC is electrically connected between the switch and the connector. There is a power converter inside the OBC, which is used to convert direct current (DC) into alternating current (AC). During the battery charging process, the power converter is mainly used to convert the AC power from the power grid into DC power for the battery to use or store. During the process of the battery discharging to the load, the power converter is mainly used to convert the DC power of the battery into AC power for the load to use.

[0083] Optionally, during the battery charging process, the power converter can be connected to the power grid through the slow charging port.

[0084] As Figure 1 shown, there is a relay and a fuse inside the OBC, and both are located between the power converter and the connector. Among them, the relay is the switch module described above, and the fuse is used to blow when the current is overloaded to further improve the safety of the electric vehicle discharging system.

[0085] As Figure 1 shown, there are jacks and a detection module inside the connector. The detection module includes a temperature sensor, an ammeter, a voltmeter, an interlock terminal, etc. Among them, the jack is used to insert the power cord of the load, and the detection module communicates with the T-box through CAN. The T-box is used to transmit the acquisition results of the BMS and the detection results of the detection module to the target device. The user can also send instructions to the communication module through the target device to send instructions to the control module to control the entire discharging system through the target device. Among them, the T-box can be the communication module mentioned above.

[0086] The VCU, i.e., the vehicle controller, controls the BMS and the OBC through CAN, which is the control module mentioned above.

[0087] The display screen can be used for the user to select the discharging mode of the battery, and can also display reminder signal-related information and blink when the control module controls the battery to stop supplying power to the load. Thus, the display screen can have the dual functions of an input module and a reminder module.

[0088] Based on the same concept, the embodiments of the present disclosure also provide an electric vehicle, which includes the electric vehicle discharging system provided above.

[0089] In the electric vehicle provided by the embodiments of the present disclosure, the above-mentioned electric vehicle discharging system is adopted. In this way, during the process of discharging the battery to the load, the battery's power and temperature will be acquired, the temperature of the connector and the current flowing through the load will be detected, and based on the battery's power and temperature, the temperature of the connector, and the current flowing through the load, it will be controlled whether the battery supplies power to the load, so as to ensure that the process of the battery discharging to the load can always be carried out safely.

[0090] The embodiments of the present disclosure do not limit the types of the electric vehicle. For example, the electric vehicle can be, for example but not limited to, a BEV (Battery Electric Vehicle), a PHEV (Plug-in Hybrid Electric Vehicle), or an HEV (Hybrid Electric Vehicle).

[0091] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0092] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0093] In the description of the present disclosure, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present disclosure; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0094] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0095] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the scope of protection of the present disclosure.

[0096] The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. An electric vehicle discharge system, characterized in that: The discharge system includes a battery, a connection socket, a BMS, a detection module and a control module; The connection socket is electrically connected to the battery and is used to be electrically connected to a load; The BMS is used to obtain the power and temperature of the battery; The detection module includes a temperature sensor and an ammeter, wherein the temperature sensor is used to detect the temperature of the connection socket, and the ammeter is used to detect the current flowing through the load; The control module is used to control whether the battery supplies power to the load based on the acquisition result of the BMS and the detection results of the temperature sensor and the ammeter.

2. The electric vehicle discharge system according to claim 1, characterized in that: The control module is used to control the battery to stop supplying power to the load when at least one of the following conditions is met: the battery power is lower than a specified power, the battery temperature is higher than a first specified temperature, the connection socket temperature is higher than a second specified temperature, and the current flowing through the load is higher than a specified current.

3. The electric vehicle discharge system according to claim 1, characterized in that: The BMS is also used to obtain the discharge power of the battery; The control module is further used to control the battery to stop supplying power to the load when the discharge power of the battery is greater than a specified power.

4. The electric vehicle discharge system according to claim 1, characterized in that: The detection module also includes a voltmeter, which is used to detect the voltage value of the load; The control module is further configured to control whether the battery supplies power to the load based on the detection result of the voltmeter.

5. The electric vehicle discharge system according to claim 1, characterized in that: The detection module also includes a voltmeter, which is used to detect the voltage value of the load; The control module is further configured to adjust the output power of the battery to the load based on the detection results of the voltmeter and the ammeter.

6. The electric vehicle discharge system according to claim 1, characterized in that: The discharge system further comprises an input module, wherein the input module is used for allowing a user to select a discharge mode of the battery; The control module is further used to adjust the output power of the battery to the load based on the input information of the input module.

7. The electric vehicle discharge system according to claim 1, characterized in that: The discharge system further includes a communication module, and the communication module is used to transmit the acquisition result of the BMS and the detection result of the detection module to a target device.

8. The electric vehicle discharge system according to claim 1, characterized in that: The discharge system also includes a reminder module; The control module is further configured to control the reminder module to send a reminder signal when controlling the battery to stop supplying power to the load.

9. The electric vehicle discharge system according to claim 1, characterized in that: The discharge system further comprises a switch module, wherein the switch module is used to connect the connection socket with the battery, and the control module is used to control the switch module to be turned off when it is confirmed that the battery stops supplying power to the load.

10. An electric vehicle, characterized in that: The electric vehicle comprises the electric vehicle discharge system according to any one of claims 1-9.

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