A low-voltage battery feeding emergency energy replenishment system, method, and vehicle controller

Abstract

The present invention provides a low-voltage battery power feeding emergency energy replenishment system, which includes: a low-voltage battery module, a control module, a DC charging interface, a switch unit and a protective device; the DC charging interface includes a first port side and a second port side; the protective device is arranged on the second port side of the DC charging interface; wherein: the low-voltage battery module is coupled to the first port side of the DC charging interface through the switch unit, and the control end of the switch unit and the control end of the protective device are respectively coupled to the control module; the control module is used to: monitor the state of the low-voltage battery module in real time, and when the low-voltage battery module is in a power feeding state, control the switch unit to close and control the protective device to release, so that an external charging device can charge the low-voltage battery module through the DC charging interface; wherein the state of the low-voltage battery module is used to characterize the remaining power of the low-voltage battery module.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging, and in particular to a low-voltage battery power feeding emergency energy replenishment system, method, and vehicle controller. Background Art

[0002] The currently commonly used low-voltage battery feeding emergency energy replenishment method for electric vehicles is similar to that of traditional vehicles. When the low-voltage battery is feeding, the user needs to first unlock the door with a mechanical key to enter the car, then unlock the front hatch or trunk cover of the vehicle through a mechanical device, and use a dedicated low-voltage battery charging device to recharge the low-voltage battery. This method is complicated for users to operate and requires users to have a dedicated low-voltage battery charging device. Summary of the invention

[0003] The present invention provides a low-voltage battery power feeding emergency energy replenishment system, method and vehicle controller, which can realize flexible and convenient operation of low-voltage battery energy replenishment while also having high safety.

[0004] According to a first aspect of the present invention, a low-voltage battery feeding emergency energy replenishment system is provided, the system comprising: a low-voltage battery module, a control module, a DC charging interface, a switch unit and a protection device; the DC charging interface comprises a first port side and a second port side; the protection device is arranged on the second port side of the DC charging interface; wherein:

[0005] The first end and the second end of the switch unit are respectively coupled to the low-voltage battery module and the first port side of the DC charging interface, and the control end of the switch unit and the control end of the protection device are respectively coupled to the control module;

[0006] The control module is used for:

[0007] monitoring the state of the low-voltage battery module in real time, and when the low-voltage battery module is in a normal working state, controlling the switch unit to disconnect to isolate the low-voltage battery module from the first port side of the DC charging interface; and

[0008] When the low-voltage battery module is in a feeding state, controlling the switch unit to close and controlling the protection device to be disconnected from the second port side, so that an external charging device can charge the low-voltage battery module through the DC charging interface;

[0009] The state of the low-voltage battery module is used to represent the remaining power of the low-voltage battery module.

[0010] Optionally, the protective device includes: a cover plate and an electronic lock, the cover plate is rotatably connected to the second port side, and the electronic lock is used to lock the protective device to the second port side.

[0011] Optionally, the control module includes a first control unit and a second control unit, wherein:

[0012] The first control unit is used to monitor the state of the low-voltage battery module in real time, and send a first control signal to the switch unit when the low-voltage battery module is in a normal working state; when the low-voltage battery module is in a feeding state, send a second control signal and a third control signal to the switch unit and the second control unit respectively;

[0013] The second control unit is used to control the electronic lock to unlock under the action of the third control signal.

[0014] Optionally, the switch unit is configured to be closed under the control of the second control signal, and to be opened under the control of the first control signal.

[0015] Optionally, the remaining power of the low-voltage battery module is represented by voltage, and the control module monitors the state of the low-voltage battery module by monitoring the voltage of the low-voltage battery module in real time; when the voltage is lower than a set voltage threshold, the low-voltage battery module is in a power feeding state.

[0016] Optionally, the remaining power of the low-voltage battery module is characterized by SOC, and the control module obtains the SOC value of the low-voltage battery module by real-time monitoring the voltage and current of the low-voltage battery module to monitor the state of the low-voltage battery module; when the SOC value is lower than the set SOC threshold, the low-voltage battery module is in a power feeding state.

[0017] Optionally, the switch unit includes a relay; the relay is a normally closed relay.

[0018] Optionally, the external charging device includes a DC charging pile and also includes a dedicated low-voltage feeding and energy replenishing device.

[0019] According to a second aspect of the present invention, a low-voltage battery feeding emergency energy replenishment method is provided, which is applied to the above-mentioned low-voltage battery feeding emergency energy replenishment system, and the method includes:

[0020] Collecting the status of the low-voltage battery module to determine whether the low-voltage battery module is in a power feeding state: if not, controlling the switch unit to be disconnected, and controlling the protection device to be locked with the second port side;

[0021] If yes, perform the following steps:

[0022] Controlling the switch unit to close so that the low-voltage battery module is connected to the first port side of the DC charging interface, and controlling the protection device to be unlocked;

[0023] An external charging device is connected to the second port side of the DC charging interface to charge the low-voltage battery.

[0024] According to a third aspect of the present invention, a vehicle controller is provided, which includes a memory, a processor, and a program stored in the memory and executable on the processor, and the processor implements the steps of the low-voltage battery power feeding emergency energy replenishment method when executing the program.

[0025] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a program is stored, and when the program is executed by a processor, the steps of the low-voltage battery feeding emergency energy replenishment method are implemented.

[0026] The low-voltage battery power feeding emergency energy replenishment system provided by the present invention utilizes a DC charging interface as an interface for low-voltage power feeding energy replenishment of an electric vehicle to realize energy replenishment of a variety of charging devices of a low-voltage battery, and is provided with an electronic lock that is automatically unlocked when the electric vehicle is low-voltage fed, so that the operation is flexible and convenient while also having high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 One of the module structure schematic diagrams of the low-voltage battery feeding emergency energy replenishment system provided in an embodiment of the present invention;

[0029] Figure 2 A second schematic diagram of the module structure of the low-voltage battery feeding emergency energy replenishment system provided in an embodiment of the present invention;

[0030] Figure 3 A third schematic diagram of the module structure of the low-voltage battery feeding emergency energy replenishment system provided in an embodiment of the present invention;

[0031] Figure 4 A fourth schematic diagram of the module structure of the low-voltage battery feeding emergency energy replenishment system provided in an embodiment of the present invention;

[0032] Figure 5 A schematic flow chart of a low-voltage battery power feeding emergency energy replenishment method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0036] Please refer to Figure 1 The embodiment of the present invention provides a low-voltage battery feeding emergency energy replenishment system, comprising: a low-voltage battery module 100, a control module 200, a DC charging interface 400, a switch module 300 and a protection device 500; the DC charging interface 400 comprises a first port side and a second port side; the protection device 500 is arranged on the second port side of the DC charging interface 400; wherein:

[0037] The first end and the second end of the switch module 300 are respectively coupled to the low-voltage battery module 100 and the first port side of the DC charging interface 400, and the control end of the switch module 300 and the control end of the protection device 500 are respectively coupled to the control module 200;

[0038] The control module 200 is used for:

[0039] Monitor the state of the low-voltage battery module 100 in real time, and when the low-voltage battery module 100 is in a normal working state, control the switch module 300 to disconnect to isolate the low-voltage battery module 100 from the first port side of the DC charging interface 400; and

[0040] When the low-voltage battery module 100 is in a feeding state, the switch module 300 is controlled to be closed and the protection device 500 is controlled to be released, so that the external charging device 700 can charge the low-voltage battery module 100 through the DC charging interface 400;

[0041] The state of the low-voltage battery module 100 is used to represent the remaining power of the low-voltage battery module 100 .

[0042] As a specific implementation, the protection device 500 includes: a cover plate and an electronic lock 500, the cover plate is rotatably connected to the second port side, and the electronic lock 500 is used to lock the protection device 500 to the second port side.

[0043] The purpose of setting the switch module 300 is to disconnect the low-voltage battery module 100 from the DC charging interface 400 when it is in a normal state, and to protect the low-voltage battery module 100 when a problem occurs in the external charging device 700, wherein the problem includes but is not limited to excessive input voltage. When the low-voltage battery module 100 is in a feeding state, the switch module 300 is closed so that the DC charging interface 400 is electrically connected to the low-voltage battery module 100 for charging by the external charging device 700.

[0044] Please refer to Figure 2 and Figure 3 As a specific implementation, the control module 200 includes a first control module 201 and a second control module 202, wherein:

[0045] The first control module 201 is used to monitor the state of the low-voltage battery module 100 in real time. When the low-voltage battery module 100 is in a normal working state, the first control module 201 sends a first signal, such as a hard-line low-level signal, to the switch module 300 to control it to be disconnected; when the low-voltage battery module 100 is in a feeding state, the second control module 201 sends a second signal, such as a hard-line high-level signal, to the switch module 300 to control it to be closed; and at the same time, sends an unlocking signal to the second control module 202, specifically, for example, sending an unlocking signal to the second control module 202 via a CAN bus;

[0046] The second control module 202 is used to drive the electronic lock 500 to unlock through a hard-line level signal under the action of the unlocking signal; wherein the first control module 201 includes a BMS, and the second control module 202 includes a vehicle controller;

[0047] The switch module 300 is used to close under the control of the hard-line low-level signal and to open under the control of the hard-line high-level signal to achieve switching between common scenarios and low-voltage feeding scenarios. The DC charging interface 400 is used as an emergency energy replenishment interface only when the low-voltage battery module 100 is fed at low voltage, and is used as a normal DC charging interface at other times, thereby improving the safety of the vehicle.

[0048] As a specific implementation, the remaining power of the low-voltage battery module 100 is represented by voltage, and the BMS monitors the state of the low-voltage battery module 100 by monitoring the voltage of the low-voltage battery module 100 in real time; when the voltage is lower than the set voltage threshold, the low-voltage battery module 100 is in a feeding state.

[0049] As a specific implementation, the remaining power of the low-voltage battery module 100 is represented by SOC, and the BMS obtains the SOC value of the low-voltage battery module 100 by real-time monitoring the voltage and current of the low-voltage battery module 100 to monitor the state of the low-voltage battery module 100; when the SOC value is lower than the set SOC threshold, the low-voltage battery module 100 is in a feeding state.

[0050] As a preferred embodiment, the switch module 300 includes a relay, and the relay is a normally closed relay. The normally closed relay is characterized in that it is closed when no power is supplied and is opened when power is supplied. The advantage is that when the low-voltage battery module 100 is extremely powered and the power supply voltage provided by the BMS to the normally closed relay is insufficient, the normally closed relay can also be closed. At the same time, the closing and opening characteristics of the switch can also reduce power consumption.

[0051] As a preferred embodiment, the external charging device 700 includes at least a dedicated low-voltage feeding energy replenishment device, a DC charging pile or a household DC charging box, providing users with diversity and flexibility in energy replenishment scenarios; of course, when using the dedicated low-voltage battery charging device, a DC charging adapter is required.

[0052] Of course, it should be appreciated that the external charging device 700 that can charge the low-voltage battery power feeding emergency energy replenishment system provided by the present invention is not limited to the above-mentioned types. As long as the charging device can provide electrical energy through the DC charging interface 400, it falls within the protection scope of the present invention.

[0053] Please refer to Figure 4 The external charging device 700 is connected to the DC charging interface 400 via a DC charging gun 600 to charge the low-voltage battery module 100 .

[0054] Please refer to Figure 5 The present invention provides a low-voltage battery feeding emergency energy replenishment method, the method comprising:

[0055] S801: monitor the battery status of the low-voltage battery module,

[0056] S802: Identify the battery status of the low-voltage battery and determine whether the low-voltage battery module is in a power feeding state: if so, proceed to S803; if not, proceed to S805;

[0057] S803: Control the switch unit to close, so that the low-voltage battery module is connected to the first port side of the DC charging interface, and control the protection device to be unlocked;

[0058] S804: Connecting an external charging device to the second port side of the DC charging interface to charge the low-voltage battery;

[0059] S805: Control the switch unit to be disconnected.

[0060] As a specific implementation, S801 and S802 specifically include:

[0061] The BMS of an electric vehicle will monitor the status of the low-voltage battery module by monitoring the voltage of the low-voltage battery module in real time; when the voltage is lower than the set voltage threshold, the low-voltage battery module is in a power feeding state. The BMS can also obtain the SOC value of the low-voltage battery module by monitoring the voltage and current of the low-voltage battery module in real time to monitor the status of the low-voltage battery module; when the SOC value is lower than the set SOC threshold, the low-voltage battery module is in a power feeding state.

[0062] Of course, it should be appreciated that the present invention may also use other means to monitor the battery status of the low-voltage battery module. Any means that can monitor the battery status of the low-voltage battery module are within the protection scope of the present invention.

[0063] As a specific implementation, S803 and S804 specifically include:

[0064] The BMS sends a hard-line high-level signal to the switch unit to control the switch unit to close, so that the low-voltage battery module is connected to the first port side of the DC charging interface, and at the same time sends an unlocking signal to the vehicle controller through the CAN bus. The vehicle controller sends a hard-line high-level signal to the electronic lock of the protective device according to the unlocking signal to control the electronic lock to unlock;

[0065] After the electronic lock is unlocked, the external charging device is connected to the DC charging interface via a DC charging gun to charge the low-voltage battery module.

[0066] As a specific implementation, the S805 specifically includes:

[0067] The BMS sends a hard-wired high-level signal to the switch unit to control its closing.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-voltage battery-fed emergency energy replenishment system, characterized in that: include: A low-voltage battery module, a control module, a DC charging interface, a switch unit and a protection device; the DC charging interface includes a first port side and a second port side; the protection device is arranged on the second port side of the DC charging interface; wherein: The first end and the second end of the switch unit are respectively coupled to the low-voltage battery module and the first port side of the DC charging interface, and the control end of the switch unit and the control end of the protection device are respectively coupled to the control module; The control module is used for: monitoring the state of the low-voltage battery module in real time, and when the low-voltage battery module is in a normal working state, controlling the switch unit to disconnect to isolate the low-voltage battery module from the first port side of the DC charging interface; and When the low-voltage battery module is in a feeding state, controlling the switch unit to close and controlling the protection device to release, so that an external charging device can charge the low-voltage battery module through the DC charging interface; The state of the low-voltage battery module is used to represent the remaining power of the low-voltage battery module.

2. The low-voltage battery feeding emergency energy replenishment system according to claim 1, characterized in that: The protection device comprises: a cover plate and an electronic lock, wherein the cover plate is rotatably connected to the second port side, and the electronic lock is used to lock the protection device to the second port side.

3. The low-voltage battery feeding emergency energy replenishment system according to claim 2 is characterized in that: The control module includes a first control unit and a second control unit, wherein: The first control unit is used to monitor the state of the low-voltage battery module in real time, and send a first control signal to the switch unit when the low-voltage battery module is in a normal working state; when the low-voltage battery module is in a feeding state, send a second control signal and a third control signal to the switch unit and the second control unit respectively; The second control unit is used to control the electronic lock to unlock under the action of the third control signal.

4. The low-voltage battery-fed emergency energy replenishment system according to claim 3, characterized in that: The switch unit is used to be closed under the control of the second control signal, and to be opened under the control of the first control signal.

5. The low-voltage battery-fed emergency energy replenishment system according to any one of claims 1 to 4, characterized in that: The remaining power of the low-voltage battery module is represented by voltage, and the control module monitors the state of the low-voltage battery module by monitoring the voltage of the low-voltage battery module in real time.

6. The low-voltage battery-fed emergency energy replenishment system according to claim 5, characterized in that: When the voltage is lower than the set voltage threshold, the low-voltage battery module is in a feeding state.

7. The low-voltage battery-fed emergency energy replenishment system according to any one of claims 1 to 4, characterized in that: The remaining power of the low-voltage battery module is represented by SOC. The control module obtains the SOC value of the low-voltage battery module by real-time monitoring the voltage and current of the low-voltage battery module to monitor the state of the low-voltage battery module.

8. The low-voltage battery-fed emergency energy replenishment system according to claim 7, characterized in that: When the SOC value is lower than a set SOC threshold, the low-voltage battery module is in a feeding state.

9. The low-voltage battery-fed emergency energy replenishment system according to claim 1, characterized in that: The switch unit includes a relay.

10. The low-voltage battery-fed emergency energy replenishment system according to claim 9, characterized in that: The relay is a normally closed relay.

11. The low-voltage battery-fed emergency energy replenishment system according to any one of claims 1 to 3, characterized in that: The external charging device includes a DC charging pile.

12. The low-voltage battery-fed emergency energy replenishment system according to any one of claims 1 to 3, characterized in that: The external charging device includes a dedicated low-voltage power feeding and energy replenishing device.

13. A low-voltage battery feeding emergency energy replenishment method, applied to the low-voltage battery feeding emergency energy replenishment system according to any one of claims 1 to 12, characterized in that: The method comprises: Collecting the status of the low-voltage battery module and determining whether the low-voltage battery module is in a feeding state: if not, controlling the switch unit to be disconnected; If yes, perform the following steps: Controlling the switch unit to close so that the low-voltage battery module is connected to the first port side of the DC charging interface, and controlling the protection device to be unlocked; An external charging device is connected to the second port side of the DC charging interface to charge the low-voltage battery.

14. A vehicle controller, characterized in that: The vehicle controller includes a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, the steps of the low-voltage battery power feeding emergency energy replenishment method as claimed in claim 13 are implemented.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program, and when the program is executed by the processor, the steps of the low-voltage battery power feeding emergency energy replenishment method as claimed in claim 13 are implemented.

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