Vehicle-mounted energy storage power supply

Abstract

The utility model discloses a vehicle-mounted energy storage power supply which can identify the charging type, automatically adjust the charging power according to the identified charging type, and improve the charging speed. The vehicle-mounted energy storage power supply comprises a power supply main body and a charging wire, wherein the power supply main body comprises a battery pack, a BMS module, a DC-DC module, an MCU module, an input interface, an output interface and a switch; wherein the input interface is provided with an ACC end, a VCC end and a GND end, and the input interface is connected with a vehicle fuse box or a vehicle cigarette lighter port through a charging line; the output interface is used for connecting in-vehicle monitoring equipment; the switch is used for controlling the on or off state of the vehicle-mounted energy storage power supply; the charging line comprises a first charging line and a second charging line, the input end and the output end of the first charging line are respectively provided with an ACC end, a VCC end and a GND end, the input end of the second charging line is provided with a VCC end and a GND end, the output end of the second charging line is provided with an ACC end, a VCC end and a GND end, and the ACC end of the output end of the second charging line is connected with the GND end or the VCC end through a resistor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile accessories, especially relates to a vehicle-mounted energy storage power supply. BACKGROUND

[0002] Among various automobile accessories, the vehicle-mounted energy storage power supply can be charged after the vehicle is started and can supply power to the in-vehicle monitoring device (such as a vehicle event data recorder) after the vehicle is stopped, thus realizing the parking monitoring function.

[0003] There are generally two charging methods for the vehicle-mounted energy storage power supply. One is charging through the vehicle lighter port (low-power slow charging). The vehicle lighter port can generally provide a current of less than 10 A (the supply voltage of a household car is generally 12 V, and the supply voltage of a truck is generally 24 V). This power supply method can only charge after the vehicle is started and cannot charge after the vehicle is stopped. The other is charging through the vehicle fuse box (high-power fast charging). The vehicle fuse box can generally provide a current of 10-20 A and can continuously supply power after the vehicle is stopped.

[0004] Under the condition that the rated capacity of the vehicle-mounted energy storage power supply is the same, the higher the state of charge is, the longer the in-vehicle monitoring device can work after parking. Therefore, the vehicle-mounted energy storage power supply needs to improve the charging speed as much as possible after the vehicle is started. Although the vehicle lighter port can provide a maximum supply current of 10 A, the supply current provided to the vehicle-mounted energy storage power supply needs to be controlled at about 7 A in consideration of the fact that the vehicle lighter port usually also supplies power to other devices (such as charging a mobile phone). Otherwise, it may affect the use of other devices. For the setting of the charging power of the vehicle-mounted energy storage power supply, if the maximum output current of the vehicle lighter port is 7 A, the vehicle-mounted energy storage power supply cannot realize the fast charging function. If the maximum output current of the vehicle fuse box is 10-20 A, when the vehicle lighter port is inserted for charging, the vehicle lighter port may be overloaded and protected, thus affecting the practicability. SUMMARY

[0005] One of the purposes of the utility model is at least to provide a vehicle-mounted energy storage power supply that can identify the charging type, automatically adjust the charging power according to the identified charging type, improve the charging speed, and avoid the occurrence of the vehicle lighter port overload protection phenomenon.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions.

[0007] The vehicle-mounted energy storage power supply comprises a power supply body and a charging line, wherein the power supply body comprises a battery pack for providing power for in-vehicle monitoring equipment, a BMS module connected with the battery pack for monitoring and managing the working state of the battery pack, a DC-DC module connected with the BMS module and the MCU module for providing constant current and constant voltage power required for charging the battery pack, an MCU module for controlling the working state of the vehicle-mounted energy storage power supply, an input interface, an output interface and a switch.

[0008] The input interface is provided with an ACC terminal, a VCC terminal and a GND terminal, and the input interface is connected with the vehicle fuse box or the vehicle cigarette lighter port through the charging line; the output interface is used for connecting the in-vehicle monitoring equipment; the switch is connected with the MCU module and is used for controlling the opening or closing state of the vehicle-mounted energy storage power supply; the charging line comprises a first charging line and a second charging line, the input end and the output end of the first charging line are respectively provided with an ACC terminal, a VCC terminal and a GND terminal, the input end of the second charging line is provided with a VCC terminal and a GND terminal, the output end of the second charging line is provided with an ACC terminal, a VCC terminal and a GND terminal, and the ACC terminal of the output end of the second charging line is connected with the GND terminal or the VCC terminal through a resistor.

[0009] Preferably, the power supply body further comprises an LED display module, and the LED display module is electrically connected with the MCU module.

[0010] Preferably, the output interface comprises a first output interface and a second output interface, and the first output interface is connected with the input end of the in-vehicle monitoring equipment through a step-down line.

[0011] Preferably, the first output interface is electrically connected with a DC output module, the DC output module is electrically connected with the BMS module, and the DC output module is further electrically connected with the MCU module.

[0012] Preferably, the second output interface is a USB interface, and the interface type of the USB interface is a USB-A, USB-C, USB-Micro or USB-Mini interface.

[0013] Preferably, the second output interface is electrically connected with a USB output module, the USB output module is electrically connected with the BMS module, and the USB output module is further electrically connected with the MCU module.

[0014] Preferably, the USB output module comprises an overcurrent protection circuit and a short-circuit protection circuit, and the DC output module comprises an overcurrent protection circuit and a short-circuit protection circuit.

[0015] Preferably, the DC-DC module comprises an overvoltage detection circuit and an undervoltage detection circuit.

[0016] In summary, the utility model has at least the following beneficial effects:

[0017] By setting ACC end, VCC end and GND end at the input interface of the power main body, after the input interface of the power main body is connected with the vehicle fuse box or the vehicle cigarette lighter port through the charging wire, the charging type of the power main body can be recognized according to the change of the ACC input level under the cooperation of the charging wire and the input interface of the power main body, and the charging power of the power main body can be adjusted according to the recognized charging type, so that the charging speed is improved, and the vehicle cigarette lighter port overload protection phenomenon is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the structure schematic view of the vehicle-mounted energy storage power supply of the exemplary embodiment of the utility model.

[0019] Fig. 2 It is the first charging wire schematic view of the exemplary embodiment of the utility model.

[0020] Fig. 3 It is the second charging wire schematic view of the exemplary embodiment of the utility model.

[0021] The figure identification: 1-battery group, 2-BMS module, 3-DC-DC module, 4-MCU module, 5-input interface, 6-DC output module, 7-output interface, 71-first output interface, 72-second output interface, 8-switch, 9-USB output module, 10-LED display module, 11-first charging wire, 12-second charging wire, 13-resistor. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail in combination with the drawings and the embodiment, so that the purpose, technical scheme and advantage of the utility model are more clear and obvious.It should be understood that the specific embodiment described herein is only used to explain the utility model, and is not used to limit the utility model.

[0023] Reference Figs. 1-3The vehicle-mounted energy storage power supply of the exemplary embodiment of the utility model includes a power supply main body and a charging wire, and the power supply main body comprises: a battery pack 1 for providing electric energy for in-vehicle monitoring equipment; a BMS module 2 connected with the battery pack 1 for monitoring and managing the working state of the battery pack; a DC-DC module 3 connected with the BMS module 2 and an MCU module 4 respectively for providing a constant-current constant-voltage power supply required for charging the battery pack 1; the MCU module 4 for controlling the working state of the vehicle-mounted energy storage power supply; an input interface 5, an output interface 7 and a switch 8; wherein the input interface 5 is provided with an ACC terminal, a VCC terminal and a GND terminal, the input interface 5 is connected with a vehicle fuse box or a vehicle cigar lighter port through the charging wire; the output interface 7 is used for connecting the in-vehicle monitoring equipment; the switch 8 is connected with the MCU module 4 for controlling the opening or closing state of the vehicle-mounted energy storage power supply; the charging wire comprises a first charging wire 11 and a second charging wire 12, the input end and the output end of the first charging wire 11 are respectively provided with an ACC terminal, a VCC terminal and a GND terminal (the input end of the first charging wire is not shown in the figure), the input end of the second charging wire 12 is provided with a VCC terminal and a GND terminal (the input end of the second charging wire is not shown in the figure), and the output end of the second charging wire 12 is provided with an ACC terminal, a VCC terminal and a GND terminal, and the ACC terminal of the output end of the second charging wire 12 is connected with the GND terminal through a resistor 13. Fig. 2 Fig. 3

[0024] The vehicle-mounted energy storage power supply can recognize the charging type (vehicle fuse box or vehicle cigar lighter charging) through the cooperation of the charging wire and the power supply main body, can automatically adjust the charging power of the vehicle-mounted energy storage power supply according to the recognized charging type, and thus the charging speed of the vehicle-mounted energy storage power supply is improved.

[0025] When the vehicle fuse box is used to charge the vehicle-mounted energy storage power supply, the input end of the first charging wire 11 is connected with the vehicle fuse box, and the output end of the first charging wire 11 is connected with the power supply main body; the VCC terminal of the vehicle fuse box has electricity in the state of starting or stopping of the vehicle, the ACC terminal of the vehicle fuse box is controlled by an ignition switch, has electricity when the vehicle is started / driven, is powered off when the vehicle is stopped, and the initial voltage of the ACC terminal of the input interface 5 is about 5V when the power supply main body is not connected with the vehicle fuse box.

[0026] ​​When the vehicle is started, the ACC terminal of the vehicle fuse box outputs high level (i.e. the voltage of the vehicle battery, usually 12V for passenger cars and 24V for trucks), the initial voltage of the ACC terminal of the input interface 5 is raised to the voltage of the vehicle battery, and the vehicle-mounted energy storage power supply is identified by the voltage state of the ACC terminal of the input interface 5 as being connected to the vehicle fuse box for charging. The DC-DC module 3 is controlled to start the high-power fast charging mode to charge the battery pack 1; when the vehicle is turned off, the ACC terminal of the vehicle fuse box is turned off (i.e. in an open circuit state), the voltage of the ACC terminal of the input interface 5 is lowered to the initial voltage, and the vehicle-mounted energy storage power supply is identified by the voltage state of the ACC terminal of the input interface 5 as being turned off. The vehicle is controlled to close the charging to prevent the vehicle battery from being over-discharged and causing the vehicle to be unable to start.

[0027] When the vehicle cigarette lighter is used to charge the vehicle-mounted energy storage power supply, the input end of the second charging line 12 is connected to the vehicle cigarette lighter port, and the output end of the second charging line 12 is connected to the power body; the vehicle cigarette lighter port has no ACC signal, and the VCC power supply of the vehicle cigarette lighter port is controlled by the ignition switch, which is powered when the vehicle is started / driven and is powered off when the vehicle is turned off. When the power body is not connected to the vehicle cigarette lighter, the initial voltage of the ACC terminal of the input interface 5 is about 5V.

[0028] After the output end of the second charging line 12 is connected to the input interface 5 of the power body, under the action of the resistor 13 at the output end of the second charging line 12, the ACC terminal of the input interface 5 of the power body is also connected to the GND terminal through the same resistor 13, and the initial voltage of the ACC terminal of the input interface 5 is lowered (the voltage of the ACC terminal is about 1V). The vehicle-mounted energy storage power supply is identified by the voltage state of the ACC terminal of the input interface 5 as being connected to the cigarette lighter port for charging, and when the vehicle is started, the DC-DC module 3 is controlled to start the low-power slow charging mode to charge the battery pack 1; when the vehicle is turned off, the VCC of the vehicle cigarette lighter port has no voltage output, the vehicle cigarette lighter port stops supplying power, and the DC-DC module 3 closes the charging.

[0029] In the above process, it should be noted that when the power body 5 is not connected to the charging line, the initial voltage value of the ACC terminal of the input interface 5 is only for reference, and the specific initial voltage value can be set as needed; similarly, after the power body 5 is connected to the second charging line 12, the specific value of the initial voltage of the ACC terminal of the input interface 5 is also only for reference, and the specific value after the decrease can be determined according to the circuit design and the specific specifications of the resistor 13.

[0030] In the application process, the ACC end of the output end of the second charging line 12 can be connected to the GND end through the resistance 13, and the ACC end of the output end of the second charging line 12 can be connected to the VCC end through the resistance 13. After the ACC end of the output end of the second charging line 12 is connected to the VCC end or the GND end through the resistance 13, the initial voltage of the ACC end of the input interface 5 changes, and the charging type can be identified by comparing the change of the initial voltage of the ACC end of the input interface 5.

[0031] The DC-DC module 3 includes an overvoltage detection circuit and an undervoltage detection circuit. The overvoltage detection circuit and the undervoltage detection circuit are used to detect whether the charging voltage is higher or lower than a safety threshold. The overvoltage detection circuit prevents the vehicle-mounted energy storage power supply circuit from being damaged due to the charging voltage being higher than the safety threshold. The undervoltage detection circuit is used to prevent the vehicle battery from being over-discharged, thereby achieving double protection.

[0032] The power supply main body further includes an LED display module 10 electrically connected to the MCU module 4. The amount of electricity in the charging process or the discharging process of the vehicle-mounted energy storage power supply can be displayed through the LED display module 10.

[0033] The input interface 5 is connected to the DC-DC module 3. The output interface 7 includes a first output interface 71 and a second output interface 72. The first output interface 71 and the second output interface 72 can improve the flexibility of the connection between the in-vehicle monitoring device and the vehicle-mounted energy storage power supply.

[0034] The first output interface 71 includes an ACC end, a VCC end, and a GND end. The input end and the output end of the step-down line are respectively provided with the ACC end, the VCC end, and the GND end. The ports of the first output interface 71 and the ports of the input end of the step-down line are correspondingly connected. The output end of the step-down line and the ports (ACC end, VCC end, and GND end) of the input end of the in-vehicle monitoring device are correspondingly connected.

[0035] The first output interface 71 is electrically connected to the DC output module 6. The DC output module 6 is electrically connected to the BMS module 2 and the MCU module 4. Under the control of the MCU module 4, the battery pack 1 supplies power to the in-vehicle monitoring device through the BMS module 2, the DC output module 6, the first output interface 71, and the step-down line. The DC output module 6 includes an overcurrent protection circuit and a short-circuit protection circuit. When the output current exceeds the preset current, the vehicle-mounted energy storage power supply output can be turned off through the overcurrent protection circuit and the short-circuit protection circuit, thereby preventing the vehicle-mounted energy storage power supply or the in-vehicle monitoring device from being damaged.

[0036] The second output interface 72 is a USB interface, through which the in-vehicle monitoring device can be directly connected, improving the flexibility of the use of the vehicle-mounted energy storage power supply; the interface type of the USB interface can be a USB-A, USB-C, USB-Micro or USB-Mini interface, and the USB interface can directly connect the in-vehicle monitoring device through a connecting line to provide power supply for the in-vehicle monitoring device.

[0037] The second output interface 72 is electrically connected with the USB output module 9, the USB output module 9 is electrically connected with the BMS module 2 and the MCU module 4 respectively, under the control of the MCU module 4, the battery pack 1 supplies power to the in-vehicle monitoring device through the BMS module 2, the USB output module 9 and the second output interface 72. The USB output module 9 also includes an overcurrent protection circuit and a short circuit protection circuit, when the output current exceeds the preset current, the overcurrent protection circuit and the short circuit protection circuit can shut off the output of the vehicle-mounted energy storage power supply, preventing the vehicle-mounted energy storage power supply or the in-vehicle monitoring device from being damaged.

[0038] The above is only a detailed description of the specific implementation of the present application, and is not a limitation of the present application. Various substitutions, modifications and improvements made by those skilled in the related technical field without departing from the principles and scope of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle-mounted energy storage power supply, characterized by comprising: The application relates to a power supply body and a charging line, wherein the power supply body comprises: a battery pack for providing electric energy for an in-vehicle monitoring device; a BMS module connected with the battery pack and used for monitoring and managing the working state of the battery pack; a DC-DC module connected with the BMS module and an MCU module respectively and used for providing a constant-current constant-voltage power supply required by the battery pack; an MCU module used for controlling the working state of the vehicle-mounted energy storage power supply; an input interface, an output interface and a switch. The input interface is provided with an ACC end, a VCC end and a GND end, the input interface is connected with a vehicle fuse box or a vehicle cigarette lighter port through the charging line, the output interface is used for connecting the in-vehicle monitoring device, the switch is connected with the MCU module and is used for controlling the opening or closing state of the vehicle-mounted energy storage power supply, the charging line comprises a first charging line and a second charging line, the input end and the output end of the first charging line are respectively provided with the ACC end, the VCC end and the GND end, the input end of the second charging line is provided with the VCC end and the GND end, the output end of the second charging line is provided with the ACC end, the VCC end and the GND end, and the ACC end of the output end of the second charging line is connected with the GND end or the VCC end through a resistor. The power supply body further comprises an LED display module which is electrically connected with the MCU module.

2. The vehicle-mounted energy storage power source of claim 1, wherein, The output interface comprises a first output interface and a second output interface, the first output interface is connected with an input end of the in-vehicle monitoring device through a voltage reduction line.

3. The vehicle-mounted energy storage power source of claim 1, wherein, The first output interface is electrically connected with a DC output module, the DC output module is electrically connected with the BMS module, and the DC output module is further electrically connected with the MCU module.

4. The vehicle-mounted energy storage power source of claim 3, wherein, The second output interface is a USB interface, the interface type of the USB interface is a USB-A, USB-C, USB-Micro or USB-Mini interface.

5. The vehicle-mounted energy storage power source of claim 4, wherein, The second output interface is electrically connected with a USB output module, the USB output module is electrically connected with the BMS module, and the USB output module is further electrically connected with the MCU module.

6. The vehicle-mounted energy storage power source of claim 5, wherein, The USB output module comprises an overcurrent protection circuit and a short-circuit protection circuit, and the DC output module comprises an overcurrent protection circuit and a short-circuit protection circuit.

7. The vehicle-mounted energy storage power source of claim 6, wherein, The DC-DC module comprises an overvoltage detection circuit and an undervoltage detection circuit.

8. The vehicle-mounted energy storage power source of any one of claims 1-7, wherein, ​

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