Charging system, vehicle and charging management system

Abstract

The embodiment of the utility model provides a charging system, a vehicle and a charging management system. The charging system comprises a battery module; the first sampling circuit is connected with the battery module; the detection unit is connected with the battery module, the detection unit comprises a first sampling port, and the first sampling port is connected with the first sampling circuit; the detection unit is used for acquiring the first sampling voltage of the first sampling circuit and judging whether the battery module works abnormally or not according to the first sampling voltage; according to the utility model, the problem that power cannot be normally supplied due to insufficient battery voltage or the battery is damaged due to excessive discharge possibly caused by blind power supply is avoided, the battery module is effectively protected, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a charging system, a vehicle, and a charging management system. Background Technology

[0002] With the development of technology, the popularization of new energy vehicles and smart mobile devices has promoted the widespread application of vehicle power supply technology. In the scenario where the vehicle energy storage system supplies power to external devices, the power is generally supplied by the battery. However, the vehicle system cannot sense the remaining energy status of the battery in real time, which makes it easy to cause the battery to over-discharge after a long period of power supply, resulting in the risk of the whole vehicle being depleted. Utility Model Content

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a charging system, vehicle, and charging management system that overcomes or at least partially solves the above problems.

[0004] To address the aforementioned problems, this utility model discloses a charging system, which includes:

[0005] Battery module;

[0006] The first sampling circuit is connected to the battery module;

[0007] A detection unit is connected to the battery module, and the detection unit includes a first sampling port, which is connected to the first sampling circuit.

[0008] The detection unit is used to acquire the first sampling voltage of the first sampling circuit and determine whether the battery module is malfunctioning based on the first sampling voltage.

[0009] Optionally, the detection unit is a low-voltage DC / DC converter. The primary side of the low-voltage DC / DC converter is connected to the battery module, and the secondary side of the low-voltage DC / DC converter is connected to an external device. The low-voltage DC / DC converter is used to determine that the battery module is malfunctioning when the first sampling voltage is less than a first voltage threshold, and to stop charging the external device, or to stop charging the external device.

[0010] Optionally, the low-voltage DC / DC converter is used to determine that the battery module is working normally when the first sampled voltage is greater than or equal to the first voltage threshold, and to charge the external device.

[0011] Optionally, it also includes:

[0012] A switch, one end of which is connected to the positive terminal of the secondary side of the low-voltage DC / DC converter, and the other end of which is used to connect to the external device;

[0013] The low-voltage DC / DC converter is used to control the switch to close and charge the external device if the first sampled voltage is greater than or equal to the first voltage threshold.

[0014] Optionally, the first sampling circuit includes a first resistor and a second resistor connected in series;

[0015] The first sampling port of the low-voltage DC / DC converter is connected between the first resistor and the second resistor;

[0016] The low-voltage DC / DC converter is used to obtain a first sampled voltage across the second resistor, and when the first sampled voltage is greater than or equal to the first voltage threshold, control the switch to close and charge the external device.

[0017] Optionally, the charging system further includes:

[0018] A vehicle microcontroller is connected to the low-voltage DC / DC converter;

[0019] The second sampling circuit is connected to the secondary side of the vehicle microcontroller and the low-voltage DC / DC converter.

[0020] The low-voltage DC / DC converter includes a second sampling port, which is connected to the second sampling circuit.

[0021] The vehicle microcontroller is used to output a first voltage to the second sampling circuit;

[0022] The low-voltage DC / DC converter is used to obtain a second sampling voltage of the second sampling circuit when the second sampling circuit receives the first voltage signal, and to determine whether the external device is connected to the secondary side of the low-voltage DC / DC converter based on the second sampling voltage. If the external device is connected to the secondary side of the low-voltage DC / DC converter, the first sampling voltage of the first sampling circuit is obtained, and the battery module is determined to be malfunctioning based on the first sampling voltage. If the battery module is working normally, power is supplied to the external device.

[0023] Optionally, the second sampling circuit includes a third resistor and a fourth resistor connected in series; the third resistor and the fourth resistor are connected in parallel with the low-voltage DC / DC converter;

[0024] The second sampling port is connected between the third resistor and the fourth resistor;

[0025] The low-voltage DC / DC converter is configured to acquire a second sampling voltage across the fourth resistor when the second sampling circuit receives the first voltage, and determine that the external device is connected to the secondary side of the low-voltage DC / DC converter when the second sampling voltage is less than a third voltage threshold; and determine that the external device is not connected to the secondary side of the low-voltage DC / DC converter when the second sampling voltage is greater than or equal to the third voltage threshold.

[0026] Optionally, the charging system further includes:

[0027] A protection circuit is connected between the vehicle microcontroller and the second sampling circuit.

[0028] Optionally, the protection circuit includes:

[0029] The fifth resistor, one end of which is connected to the vehicle microcontroller;

[0030] A diode, one end of which is connected to the other end of the fifth resistor, and the other end of which is connected to one end of the third resistor.

[0031] Optionally, the external device includes:

[0032] A battery management system control board, wherein the primary side of the battery management system control board is connected to the secondary side of the low-voltage DC / DC converter;

[0033] The device battery, the positive and negative terminals of which are connected to the secondary side of the battery management system control board;

[0034] The low-voltage DC / DC converter is configured to wake up the battery management system control board if it is determined that the external device is connected to the secondary side of the low-voltage DC / DC converter, and output a second voltage to the battery management system control board after the battery management system control board is woken up, so as to charge the device battery.

[0035] Optionally, the battery management system control board is connected to the secondary side of the low-voltage DC / DC converter via a signal line;

[0036] The low-voltage DC / DC converter is configured to send a wake-up signal to the battery management system control board via the signal line to wake up the battery management system control board if it is determined that the external device is connected to the secondary side of the low-voltage DC / DC converter.

[0037] Optionally, the charging system further includes a first Bluetooth component connected to the vehicle microcontroller; the battery management system control board includes a second Bluetooth component; and the vehicle microcontroller is also connected to the battery module.

[0038] The vehicle microcontroller is used to collect the output current of the battery module. When the output current is greater than a preset current threshold, it sends a current control signal to the second Bluetooth component through the first Bluetooth component.

[0039] The second Bluetooth component is used to transmit the current control signal to the low-voltage DC / DC converter;

[0040] The low-voltage DC / DC converter is used to adjust the output power or stop supplying power to the external device according to the current control signal.

[0041] Optionally, the battery module includes:

[0042] Power battery;

[0043] A high-voltage DC / DC converter, wherein the primary side of the high-voltage DC / DC converter is connected to the power battery, for obtaining the high-voltage power output from the power battery;

[0044] A startup battery is connected to the secondary side of the high-voltage DC / DC converter, and the startup battery is connected in parallel with the first sampling circuit.

[0045] The high-voltage DC / DC converter is used to output a third voltage to power the startup battery based on the high-voltage power supply.

[0046] This utility model also discloses a vehicle that includes the charging system described above.

[0047] This utility model also discloses a charging management system, which includes a charging system as described above and an external device, wherein the charging system is connected to the external device.

[0048] The embodiments of this utility model have the following advantages:

[0049] This utility model discloses a charging system, a vehicle, and a charging management system. This utility model detects the first sampling voltage of the first sampling circuit through a detection unit, and determines whether the battery module is malfunctioning based on the first sampling voltage. This utility model can supply power to the outside based on the actual voltage condition of the battery module, avoiding the problem of insufficient battery voltage leading to failure to supply power normally or damage to the battery due to over-discharge that may be caused by blindly supplying power, effectively protecting the battery module and extending its service life. Attached Figure Description

[0050] Figure 1 This is a structural block diagram of another charging system provided in an embodiment of the present utility model;

[0051] Figure 2 This is a structural block diagram of another charging system provided in an embodiment of the present utility model;

[0052] Figure 3 This is a structural block diagram of another charging system provided in an embodiment of the present utility model;

[0053] Figure 4 This is a structural block diagram of a vehicle provided in an embodiment of the present utility model;

[0054] Figure 5 This is a structural block diagram of a charging management system provided in an embodiment of the present invention. Detailed Implementation

[0055] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] One of the core concepts of this utility model is that it detects the first sampling voltage of the first sampling circuit through a detection unit, and determines whether the battery module is malfunctioning based on the first sampling voltage. This utility model can supply power to the outside based on the actual voltage of the battery module, avoiding the problem of insufficient battery voltage leading to failure to supply power or damage to the battery due to over-discharge that may result from blindly supplying power, effectively protecting the battery module and extending the battery's lifespan. This utility model can adjust the external power supply strategy according to the actual battery voltage of the battery module, significantly improving the reliability of the battery's external power supply.

[0057] Reference Figure 1 A structural block diagram of a charging system 10 is shown, the charging system comprising:

[0058] Battery module 101;

[0059] The first sampling circuit 102 is connected to the battery module 101;

[0060] The detection unit 103 is connected to the battery module 101. The detection unit 103 includes a first sampling port, which is connected to the first sampling circuit.

[0061] The detection unit 103 is used to acquire the first sampling voltage of the first sampling circuit 102 and determine whether the battery module 101 is malfunctioning based on the first sampling voltage.

[0062] In this invention, the battery module 101 serves as the energy source for the entire charging system, storing electrical energy that can be output and providing power support for charging the external device 20.

[0063] The detection unit 103 is connected to the positive and negative terminals of the battery module 101 to obtain the electrical energy of the battery module; at the same time, it includes a first sampling port A1, which is connected to a first sampling circuit to detect the first sampling voltage data at the first sampling circuit, and then it can determine whether the battery module 101 is malfunctioning based on the first sampling voltage data.

[0064] The first sampling circuit 102 can be connected to the battery module 101. The voltage output by the battery module 101 can pass through the first sampling circuit 102. The detection unit 103 can collect the first sampling voltage on the first sampling circuit 102 and determine whether the voltage output by the battery module 101 is normal based on the first sampling voltage. If the output voltage is normal, it can be determined that the battery module is working normally. If the output voltage is abnormal, it can be determined that the battery module is working abnormally.

[0065] In one embodiment of this utility model, the first sampling circuit 102 can be connected in parallel with the battery module 101.

[0066] The detection unit 103 can determine whether the battery module is malfunctioning based on the first sampled voltage. The first sampled voltage value reflects the actual voltage status of the current battery module and is an important basis for formulating subsequent power supply strategies.

[0067] The detection unit 103 can supply power to the outside with appropriate voltage and current when it determines that the battery module is working normally. Through the above process, the charging system can intelligently provide appropriate power to the outside according to the actual voltage of the battery module.

[0068] It should be noted that the detection unit 103 may include a charging control microcontroller 1031. The charging control microcontroller 1031 can determine whether the battery module 101 is malfunctioning based on the acquired first sample voltage. If the battery module 101 is malfunctioning, it will output a suitable voltage; if the battery module 101 is malfunctioning, the charging control microcontroller 1031 will stop outputting voltage. This allows for intelligent power supply based on the actual voltage of the battery module 101, thus preventing the battery module 101 from running out of power.

[0069] This utility model discloses a charging system. The utility model detects the first sampling voltage of the first sampling circuit through a detection unit, and determines whether the battery module is malfunctioning based on the first sampling voltage. The utility model can supply power to the outside according to the actual voltage condition of the battery module, avoiding the problem of insufficient battery voltage leading to failure to supply power normally or damage to the battery due to over-discharge that may be caused by blindly supplying power. This effectively protects the battery module and extends the battery life.

[0070] In one embodiment of this utility model, reference is made to... Figure 2 The diagram shows a structural block diagram of another charging system 10. The detection unit 103 can be a low-voltage DC / DC converter. The primary side of the low-voltage DC / DC converter 103 is connected to the battery module 101, and the secondary side of the low-voltage DC / DC converter 103 is connected to the external device 20. The low-voltage DC / DC converter is used to determine that the battery module is malfunctioning when the first sampling voltage is less than the first voltage threshold, and to stop charging the external device, or not to charge the external device.

[0071] In this embodiment of the present invention, the first voltage threshold refers to the maximum voltage obtained by the first sampling circuit after removing errors and ripple losses. The low-voltage DC / DC converter 103 can compare the obtained first sampling voltage with the preset first voltage threshold. When the battery voltage is lower than the first voltage threshold, the battery module is malfunctioning, indicating that the battery module may be overloaded and continued discharge may damage the battery. At this time, charging to external devices can be stopped.

[0072] In one example, if the output voltage of the battery module is 13.8V, the first sampling circuit includes a first resistor, a second resistor, and a third resistor. The first sampling voltage refers to the voltage across the third resistor. According to the voltage divider principle, the voltage across the third resistor is 5V. After deducting errors and ripple losses, the maximum voltage of the first sampling circuit is 4.9V. Therefore, the first voltage threshold is 4.9V. If the charging control microcontroller 1031 determines that the first sampling voltage is less than 4.9V, it indicates that the battery module is overloaded, and continued discharge may damage the battery module. If the battery module 101 is currently supplying power to the external device 20, it can stop supplying power to the external device 20. If the battery module 101 is not currently supplying power to the external device 20 but receives a charging request from the external device 20, it can stop charging the external device 20.

[0073] It should be noted that the detection unit 103 in this utility model can be a low-voltage DC / DC converter. In the specific embodiment, a low-voltage DC / DC converter is used as an example for explanation. Other devices can also be used, which are not limited here.

[0074] In one embodiment of this utility model, a low-voltage DC / DC converter is used to determine that the battery module is malfunctioning when the first sampled voltage is less than a first voltage threshold and greater than a second voltage threshold, wherein the first voltage threshold is greater than the second voltage threshold.

[0075] In this embodiment of the utility model, in order to avoid the short circuit of the resistor in the circuit from affecting the measurement results, the second voltage threshold can be used to determine whether the measured first sampling voltage is a normal voltage. The second voltage threshold is a critical value set according to the characteristics and safety requirements of the battery module. The second voltage threshold is the minimum safe voltage of the first sampling circuit. The first voltage threshold refers to the maximum voltage obtained in the first sampling circuit after removing errors and ripple losses.

[0076] The low-voltage DC / DC converter 103 can compare the acquired first sampled voltage with a preset first voltage threshold and a second voltage threshold. When the battery voltage is lower than the first voltage threshold and higher than the second voltage threshold, it indicates that the battery module may be overloaded and continued discharge may damage the battery.

[0077] In one example, if the output voltage of the battery module is 13.8V, the first sampling circuit includes a first resistor, a second resistor, and a third resistor. The first sampling voltage refers to the voltage across the third resistor. According to the voltage divider principle, the third resistor should receive a voltage of 5V. After deducting errors and ripple losses, the maximum voltage of the first sampling circuit is 4.9V. Therefore, the first voltage threshold is 4.9V, and the second voltage threshold can be set to 3V. If the charging control microcontroller 1031 determines that the first sampling voltage is greater than 3V and less than 4.9V, it indicates that the battery module is overloaded, and continued discharge may damage the battery. At this time, the charging control microcontroller 1031 can stop charging the external device 20.

[0078] In another example, if the first sampled voltage is greater than or equal to the first voltage threshold, it means that the battery module has relatively sufficient power and can continue to supply power to external devices. At this time, the low-voltage DC / DC converter 103 will adjust the output parameters according to the first sampled voltage to charge the external devices with appropriate voltage and current, avoid over-discharge, extend the battery's lifespan, and also improve the safety and reliability of the entire charging system.

[0079] In one embodiment of this utility model, it further includes: a switch K1, one end of which is connected to the positive terminal of the secondary side of the low-voltage DC / DC converter, and the other end of which is used to connect to an external device;

[0080] A low-voltage DC / DC converter is used to control a switch to close and charge an external device if a first sampled voltage is greater than or equal to a first voltage threshold.

[0081] like Figure 1 The charging system 10 may also include a switch K1, which can control the power supply by combining the comparison result of the first sampled voltage and the first voltage threshold. When the first sampled voltage is less than the first voltage threshold, it indicates that the battery module power is already at a low level, and continued discharge may damage the battery. At this time, the low-voltage DC / DC converter 103 can control the switch K1 to remain open and stop supplying power to external devices. At the same time, it can trigger a corresponding prompt mechanism, such as flashing an indicator light, emitting an alarm sound, or displaying a prompt message on the screen to inform the user that the battery power is too low.

[0082] When the first sampling voltage is greater than or equal to the first voltage threshold, it indicates that the battery module has sufficient power. The low-voltage DC / DC converter 103 can control the switch K1 to close, and transmit the power of the battery module to the external device 20 after its own conversion to charge it.

[0083] This invention can control the charging of external devices via switch K1. The charging system can more accurately manage the power output of the battery module, effectively protect the battery, extend the battery's lifespan, and improve the safety and reliability of the charging system while meeting the charging needs of external devices.

[0084] In one embodiment of this utility model, the first sampling circuit 102 includes a first resistor R1 and a second resistor R2 connected in series; the first sampling port A1 of the low-voltage DC / DC converter 103 is connected between the first resistor R1 and the second resistor R2; the low-voltage DC / DC converter 103 is used to obtain the first sampling voltage across the second resistor R2, and when the first sampling voltage is greater than or equal to a first voltage threshold, it controls the switch to close and charges the external device.

[0085] like Figure 3 The diagram shows a structural block diagram of another charging system 10 provided by the present invention. The first sampling circuit 102 may include a first resistor R1 and a second resistor R2 connected in series. The first sampling port A1 of the low-voltage DC / DC converter 103 is connected between the first resistor R1 and the second resistor R2.

[0086] The first sampling circuit uses the principle of voltage division by series resistors to divide the voltage of the battery module. Since the first sampling port A1 of the low-voltage DC / DC converter is connected between the first resistor and the second resistor, it obtains the voltage across the second resistor. This voltage value has a certain proportional relationship with the actual voltage of the battery module. When the battery module 101 is working normally, the voltage across R2 measured by the low-voltage DC / DC converter is U1. However, if the first sampling voltage measured during actual operation is less than U1, it indicates that the battery module 101 is overloaded or is working abnormally. The low-voltage DC / DC converter 103 can determine the battery module's charge status based on this first sampling voltage and decide whether to close the switch K1, thereby realizing the charging control of external devices.

[0087] When the detected first sampling voltage is greater than or equal to the first voltage threshold, the low-voltage DC / DC converter control switch K1 closes to start charging the external device. During the charging process, the change of the first sampling voltage is continuously monitored. Once the first sampling voltage is lower than the first voltage threshold but greater than the second voltage threshold, the control switch K1 is immediately opened to stop the power supply and protect the battery module 101.

[0088] Through the above-described workflow, the charging system can intelligently control whether to charge external devices based on the battery module's charge level, effectively protecting the battery module, extending its lifespan, and ensuring that external devices can be charged under appropriate conditions.

[0089] In one embodiment of this utility model, if the first sampling voltage is detected to be less than the first voltage threshold, a short circuit may have occurred in the circuit, and an alarm signal can be sent to indicate that a short circuit has occurred.

[0090] In one embodiment of this utility model, the charging system further includes: a vehicle microcontroller connected to a low-voltage DC / DC converter; a second sampling circuit connected to the vehicle microcontroller and the secondary side of the low-voltage DC / DC converter; the low-voltage DC / DC converter includes a second sampling port connected to a second sampling circuit; the vehicle microcontroller is used to output a first voltage to the second sampling circuit; the low-voltage DC / DC converter is used to acquire a second sampling voltage of the second sampling circuit when the second sampling circuit receives the first voltage, determine whether an external device is connected to the secondary side of the low-voltage DC / DC converter based on the second sampling voltage, acquire a first sampling voltage of the first sampling circuit based on the first sampling voltage, determine whether the battery module is malfunctioning based on the first sampling voltage, and supply power to the external device if the battery module is malfunctioning.

[0091] In this utility model, such as Figure 3The charging system 10 may also include a vehicle microcontroller 104 connected to a low-voltage DC / DC converter; a second sampling circuit 105 connected to the secondary side of the vehicle microcontroller 104 and the low-voltage DC / DC converter 103, the low-voltage DC / DC converter including a second sampling port A2, the second sampling port A2 being connected to the second sampling circuit 105; the first voltage output by the vehicle microcontroller 104 can be used as a trigger signal, when the second sampling circuit receives the trigger signal, its circuit state will change depending on whether an external device is connected, this change will be reflected in the second sampling voltage, the low-voltage DC / DC converter 103 obtains the second sampling voltage and analyzes and judges it, thereby determining whether the external device is connected to the secondary side.

[0092] If an external device is connected to the secondary side of the low-voltage DC / DC converter 103, since the external device can be equivalently connected to the circuit as a resistor, it will change the load condition of the second sampling circuit, causing the second sampling voltage to exhibit specific values ​​or variation characteristics. After the low-voltage DC / DC converter analyzes these characteristics and identifies that the secondary side of the low-voltage DC / DC converter is connected to the external device, the low-voltage DC / DC converter will further obtain the first sampling voltage of the first sampling circuit. Based on the comparison result of the first sampling voltage and the first voltage threshold, the converter controls the closing and opening of the switch K1 to realize the charging control of the external device.

[0093] If the external device is not connected to the secondary side, the load condition of the second sampling circuit is different from that when the device is connected. The second sampling voltage will exhibit a different characteristic. The low-voltage DC / DC converter 103 can determine that the external device is not connected based on this characteristic. At this time, no subsequent charging operation will be performed, and switch K1 remains in the open state.

[0094] By introducing a vehicle microcontroller and a second sampling circuit, this invention enables the charging system to detect the connection status of external devices more accurately and intelligently, thereby better controlling the charging process and improving the system's reliability and intelligence.

[0095] In one embodiment of this utility model, the second sampling circuit includes a third resistor and a fourth resistor connected in series; the third resistor and the fourth resistor are connected in parallel with a low-voltage DC / DC converter; the second sampling port is connected between the third resistor and the fourth resistor; the low-voltage DC / DC converter is used to obtain a second sampling voltage across the fourth resistor when the second sampling circuit receives a first voltage, and to determine that the external device is connected to the secondary side of the low-voltage DC / DC converter when the second sampling voltage is less than a third voltage threshold; and to determine that the external device is not connected to the secondary side of the low-voltage DC / DC converter when the second sampling voltage is greater than or equal to the third voltage threshold.

[0096] In this embodiment of the present invention, the third voltage threshold refers to the maximum voltage corresponding to the voltage across the fourth resistor in the second sampling circuit after removing errors and ripple losses. By comparing the second sampling voltage with the third voltage threshold, it can be determined whether the external device is connected to the low-voltage DC / DC converter. Specifically, when the second sampling voltage is less than the third voltage threshold, it is determined that the external device is connected to the secondary side of the low-voltage DC / DC converter. When it is determined that the second sampling voltage is greater than or equal to the third voltage threshold, it is determined that the external device is not connected to the secondary side of the low-voltage DC / DC converter. When it is determined that the external device is connected to the secondary side of the low-voltage DC / DC converter, it is possible to continue to detect whether the battery module is malfunctioning. When it is determined that the external device is not connected to the secondary side of the low-voltage DC / DC converter, it is not necessary to detect whether the battery module is malfunctioning.

[0097] In one embodiment of this utility model, the low-voltage DC / DC converter is further configured to determine that an external device is connected to the secondary side of the low-voltage DC / DC converter when the second sampling voltage is less than a third voltage threshold and greater than a fourth voltage threshold, wherein the third voltage threshold is greater than the fourth voltage threshold.

[0098] In this invention, the fourth voltage threshold refers to the third voltage threshold, which is the minimum safe voltage of the second sampling circuit. In order to avoid the short circuit of the resistor in the circuit from affecting the measurement results, the fourth voltage threshold can be used to determine whether the measured second sampling voltage is a normal voltage.

[0099] In one example, if the trigger signal is 13.8V, according to the voltage divider principle, the voltage divided by the fourth resistor in the second sampling circuit is 4V. After deducting errors and ripple losses, the maximum voltage divided by the fourth resistor in the second sampling circuit is 3.9V. Therefore, the third voltage threshold is 3.9V, and the fourth voltage threshold can be set to 2V. If the second sampling voltage is greater than 2V and less than 3.9V, it indicates that the second sampling circuit is connected to a load.

[0100] like Figure 3The second sampling circuit 105 may include a third resistor R3 and a fourth resistor R4 connected in series; the third resistor and the fourth resistor are connected in parallel between the positive and negative terminals of the secondary side of the low-voltage DC / DC converter; the second sampling port A2 is connected between the third resistor R3 and the fourth resistor R4; the second sampling circuit 105 can utilize the voltage divider principle of series resistors. When the vehicle microcontroller outputs the first voltage, if an external device is connected to the secondary side of the low-voltage DC / DC converter, it will change the load condition of the second sampling circuit, thereby affecting the voltage across the fourth resistor, i.e., the second sampling voltage. This can be determined by comparing the second sampling voltage with the third voltage threshold and the fourth resistor. The voltage threshold can be used to determine whether an external device is connected. Specifically, if the second sampling voltage is less than the preset third voltage threshold but greater than the fourth voltage threshold, it means that the external device is connected to the secondary side of the low-voltage DC / DC converter 103. This is because the connection of the external device changes the equivalent resistance of the second sampling circuit, causing the voltage across the fourth resistor to decrease. At this time, the low-voltage DC / DC converter then obtains the first sampling voltage of the first sampling circuit and compares it with the first voltage threshold. If the first sampling voltage meets the condition, the control switch K1 is closed to supply power to the external device; if the condition is not met, the switch K1 remains open.

[0101] When the second sampling voltage is greater than or equal to the third voltage threshold, it indicates that the external device is not connected to the secondary side of the low-voltage DC / DC converter. At this time, the circuit is in a state where no external load is connected. The second sampling voltage remains near the reference value, i.e., the third voltage threshold. The low-voltage DC / DC converter 103 will not perform subsequent power supply operations, and switch K1 remains open.

[0102] This charging system can accurately determine the connection status of external devices and rationally control whether to charge external devices based on the battery module's power level, thus improving the system's intelligence and reliability.

[0103] In one embodiment of this utility model, the charging system further includes a protection circuit, which is connected between the vehicle microcontroller and the second sampling circuit.

[0104] like Figure 3 The charging system also includes a protection circuit 106. The protection circuit 106 can prevent abnormalities in the first voltage output by the vehicle microcontroller, such as overvoltage, overcurrent, or surge, from damaging the second sampling circuit. At the same time, it can also prevent interference signals in the second sampling circuit from being fed back to the vehicle microcontroller, affecting its normal operation, and ensuring the stability and reliability of the entire detection circuit.

[0105] In one embodiment of this utility model, the protection circuit includes: a fifth resistor, one end of which is connected to the vehicle microcontroller; and a diode, one end of which is connected to the other end of the fifth resistor, and the other end of which is connected to one end of a third resistor.

[0106] like Figure 3 The protection circuit 106 may include a fifth resistor R5 and a diode D1. The fifth resistor R5 can limit the current. When there is an overcurrent in the first voltage output by the vehicle microcontroller, the fifth resistor will limit the current according to Ohm's law to prevent excessive current from damaging the subsequent circuits.

[0107] Diode D1 has a unidirectional conduction characteristic. When the first voltage output by the vehicle microcontroller is positive and greater than the diode's forward voltage, the diode conducts, and the signal can be transmitted normally to the second sampling circuit. When a reverse voltage or abnormally high voltage occurs, the diode is cut off to prevent reverse current from damaging the vehicle microcontroller.

[0108] In one embodiment of this utility model, the external device 20 includes: a battery management system control board 201, the primary side of which is connected to the secondary side of a low-voltage DC / DC converter 103; the positive and negative terminals of the device battery B1 are connected to the secondary side of the battery management system control board; and a low-voltage DC / DC converter, which is used to wake up the battery management system control board if it is determined that the external device is connected to the secondary side of the low-voltage DC / DC converter, and output a second voltage to the battery management system control board after the battery management system control board is woken up, so as to charge the device battery.

[0109] In this invention, when the low-voltage DC / DC converter 103 determines that an external device has been connected, it will send a wake-up signal to the battery management system control board to activate the battery management system control board 201. This wake-up signal can be a specific voltage pulse or logic level signal, used to start the internal circuit and program of the battery management system control board and put it into working state.

[0110] If the first sampled voltage meets the charging conditions, the low-voltage DC / DC converter control switch K1 closes, and the second voltage is obtained by boosting the voltage and output to the battery management system control board. After the low-voltage DC / DC transformer samples the device battery voltage through the second sampling point, it boosts the voltage to be close to or equal to the device battery voltage through the low-voltage DC / DC converter. After receiving the second voltage, the battery management system control board will manage and control the charging process according to the state of device battery B1. It will adjust the charging current and voltage to ensure that device battery B1 can be charged safely and efficiently. For example, when device battery B1 has a low charge, a larger charging current is used for fast charging; when the charge is close to full, the charging current is reduced to avoid overcharging.

[0111] Through this design, the charging system can intelligently detect the connection status of external devices, protect the internal battery module, and at the same time, use the battery management system control board to perform safe and efficient charging management of the external device's battery, thereby improving the reliability and practicality of the entire charging system.

[0112] In one embodiment of this utility model, the battery management system control board is connected to the secondary side of the low-voltage DC / DC converter via a signal line; the low-voltage DC / DC converter is used to send a wake-up signal to the battery management system control board via the signal line to wake up the battery management system control board if it is determined that an external device is connected to the secondary side of the low-voltage DC / DC converter.

[0113] like Figure 3 The battery management system control board is connected to the secondary side of the low-voltage DC / DC converter via the CAN signal line. When the connection of the external device is confirmed, the low-voltage DC / DC converter sends a wake-up signal to the battery management system control board 201 via the CAN signal line. The wake-up signal can be an electrical pulse signal with a specific frequency, amplitude and duration, or a signal with a specific combination of logic levels. Its purpose is to activate the circuits and programs in the battery management system control board, so that the battery management system control board enters the working state from the standby state.

[0114] It should be noted that the signal line can also be other buses, and there are no restrictions here.

[0115] In one embodiment of this utility model, the charging system further includes a first Bluetooth component 107, which is connected to the vehicle microcontroller; the battery management system control board 201 includes a second Bluetooth component 2011; the vehicle microcontroller 104 is also connected to the battery module 101, and the vehicle microcontroller 104 is used to collect the output current of the battery module 101. When the output current is greater than a preset current threshold, it sends a current control signal to the second Bluetooth component through the first Bluetooth component; the second Bluetooth component is used to transmit the current control signal to the low-voltage converter; the low-voltage DC / DC converter is used to adjust the output power or stop supplying power to external devices according to the current control signal.

[0116] In this invention, the vehicle microcontroller 104 compares the collected output current with a preset current threshold. The preset current threshold is a safe current upper limit value that is set in advance based on factors such as the design parameters of the charging system and the safe charging requirements of the device battery B1.

[0117] When the output current is less than or equal to the preset current threshold, it means that the current charging current is within a safe range and the charging process can proceed normally. The vehicle microcontroller does not perform any additional processing and continues to monitor the output current.

[0118] When the output current exceeds the preset current threshold, it indicates that the current in the current battery module is too high, which means that the power battery voltage is insufficient or the low-voltage load is too heavy. This may damage the device battery B1, such as overheating, shortening battery life, or even causing safety accidents. At this time, the vehicle microcontroller triggers the subsequent current control process.

[0119] When the output current exceeds the preset current threshold, the vehicle microcontroller 104 sends a current control signal to the second Bluetooth component 2011 in the battery management system control board 201 through the first Bluetooth component 107. This signal may contain specific current adjustment instructions, such as reducing the output current by a certain percentage. Bluetooth communication is wireless and convenient, and can flexibly transmit signals between the vehicle microcontroller and the battery management system control board, avoiding complex wiring problems.

[0120] After receiving the current control signal, the second Bluetooth component 2011 transmits it to the low-voltage DC / DC converter. This transmission process can be achieved through the internal circuitry and communication interface of the battery management system control board 201, ensuring that the signal is accurately transmitted to the low-voltage DC / DC converter 103.

[0121] After receiving the current control signal, the low-voltage DC / DC converter 103 can adjust the output power or stop supplying power to the external device 20 according to the instructions in the current control signal. Since the power P = UI (where U is the output voltage and I is the output current), under the condition of relatively stable voltage, the output power is reduced by reducing the output current, so that the output current returns to the safe range, thereby protecting the power battery or starting battery in the battery module.

[0122] It should be noted that the low-voltage DC / DC converter 103 may include a charging control microcontroller 1031. After receiving the current control signal, the second Bluetooth component 2011 transmits it to the charging control microcontroller 1031. The charging control microcontroller 1031 can adjust the output power according to the instructions in the current control signal. By introducing a Bluetooth communication component and a current control mechanism, the charging system can monitor the charging current in real time. When the current is too high, the system can promptly transmit a control signal via Bluetooth communication to adjust the output power of the low-voltage DC / DC converter, effectively protecting the device battery, improving the safety and reliability of the charging system, and extending the battery life.

[0123] In one embodiment of this utility model, the battery module 101 includes: a power battery B2; a high-voltage DC / DC converter 1011, the primary side of which is connected to the power battery for obtaining the high-voltage power output from the power battery; a starter battery B3, which is connected to the secondary side of the high-voltage DC / DC converter and is connected in parallel with the first sampling circuit 102; and the high-voltage DC / DC converter for outputting a third voltage to power the starter battery based on the high-voltage power supply.

[0124] In this invention, the power battery B2 serves as a high-energy storage unit for the entire system, providing a high-voltage power supply for the charging system. The power battery B2 typically has a high voltage and a large capacity, meeting various needs such as vehicle starting, operation, and powering other equipment. Its positive and negative terminals are connected to the primary side of the high-voltage DC / DC converter 1011, which can convert the stored chemical energy into electrical energy output.

[0125] The primary side of the high-voltage DC / DC converter 1011 is connected to the positive and negative terminals of the power battery B2, and can obtain the high-voltage power output from the power battery. Its main function is to convert the input high-voltage power supply into a voltage of 13.8V to meet the charging requirements of the starting battery B3. The high-voltage DC / DC converter contains a complex circuit structure, such as power switching transistors, inductors, and capacitors. By controlling the conduction and cutoff of the power switching transistors, the step-up and step-down conversion of the voltage is achieved.

[0126] The high-voltage DC / DC converter 1011 can output high-voltage power based on the acquired power battery. After internal voltage conversion processing, it outputs a third voltage. The voltage and current values ​​of this third voltage are precisely adjusted according to the characteristics and charging requirements of the starter battery B3. The positive and negative terminals of the starter battery B3 are connected to the secondary side of the high-voltage DC / DC converter 1011. The voltage across the starter battery is generally 12V. The starter battery can receive the third voltage for charging. The starter battery is generally used in the vehicle's starting system to provide a large instantaneous current for engine starting. Therefore, its charging process requires a stable and appropriate voltage and current. The battery module 101 uses a power battery and the high-voltage DC / DC converter 1011 to power the starter battery. This design can fully utilize the high energy density of the power battery. At the same time, through the precise voltage conversion of the high-voltage DC / DC converter, it provides a suitable charging power to the starter battery, ensuring the performance and lifespan of the starter battery. Furthermore, it works in conjunction with other components of the entire charging system, improving the energy utilization efficiency and reliability of the entire system.

[0127] This invention detects the first sampling voltage and then supplies power to external devices based on that voltage. This allows power to be supplied to external devices according to the actual voltage of the battery module, avoiding problems such as insufficient battery voltage leading to inability to supply power or damage to the battery due to over-discharge, which can occur with blind power supply. This effectively protects the battery module and extends battery life.

[0128] like Figure 4 The diagram shows a structural block diagram of a vehicle 30 provided by the present invention. The vehicle 30 includes a charging system 10 as described above.

[0129] like Figure 5 The diagram shows a structural block diagram of a charging management system 40 provided by the present invention. The charging management system 40 may include the charging system 10 and external device 20 as described above.

[0130] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0131] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0132] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0133] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0134] The above provides a detailed description of the charging system, vehicle, and charging management system provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A charging system, characterized in that, The charging system includes: Battery module; The first sampling circuit is connected to the battery module; A detection unit is connected to the battery module, and the detection unit includes a first sampling port, which is connected to the first sampling circuit. The detection unit is used to acquire the first sampling voltage of the first sampling circuit and determine whether the battery module is malfunctioning based on the first sampling voltage.

2. The charging system according to claim 1, characterized in that, The detection unit is a low-voltage DC / DC converter; the primary side of the low-voltage DC / DC converter is connected to the battery module, and the secondary side of the low-voltage DC / DC converter is connected to an external device. The low-voltage DC / DC converter is used to determine that the battery module is malfunctioning when the first sampling voltage is less than a first voltage threshold, and to stop charging the external device, or to not charge the external device.

3. The charging system according to claim 2, characterized in that, The low-voltage DC / DC converter is used to determine that the battery module is working normally when the first sampled voltage is greater than or equal to the first voltage threshold, and to charge the external device.

4. The charging system according to claim 2, characterized in that, Also includes: A switch, one end of which is connected to the positive terminal of the secondary side of the low-voltage DC / DC converter, and the other end of which is used to connect to the external device; The low-voltage DC / DC converter is used to control the switch to close and charge the external device if the first sampled voltage is greater than or equal to the first voltage threshold.

5. The charging system according to claim 4, characterized in that, The first sampling circuit includes a first resistor and a second resistor connected in series; The first sampling port of the low-voltage DC / DC converter is connected between the first resistor and the second resistor; The low-voltage DC / DC converter is used to obtain a first sampled voltage across the second resistor, and when the first sampled voltage is greater than or equal to the first voltage threshold, control the switch to close and charge the external device.

6. The charging system according to claim 2, characterized in that, The charging system also includes: A vehicle microcontroller is connected to the low-voltage DC / DC converter; The second sampling circuit is connected to the secondary side of the vehicle microcontroller and the low-voltage DC / DC converter. The low-voltage DC / DC converter includes a second sampling port, which is connected to the second sampling circuit. The vehicle microcontroller is used to output a first voltage to the second sampling circuit; The low-voltage DC / DC converter is used to obtain a second sampling voltage of the second sampling circuit when the second sampling circuit receives the first voltage signal, and to determine whether the external device is connected to the secondary side of the low-voltage DC / DC converter based on the second sampling voltage. If the external device is connected to the secondary side of the low-voltage DC / DC converter, the first sampling voltage of the first sampling circuit is obtained, and the battery module is determined to be malfunctioning based on the first sampling voltage. If the battery module is working normally, power is supplied to the external device.

7. The charging system according to claim 6, characterized in that, The second sampling circuit includes a third resistor and a fourth resistor connected in series; the third resistor and the fourth resistor are connected in parallel with the low-voltage DC / DC converter; The second sampling port is connected between the third resistor and the fourth resistor; The low-voltage DC / DC converter is used to obtain a second sampling voltage across the fourth resistor when the second sampling circuit receives the first voltage, and determine that the external device is connected to the secondary side of the low-voltage DC / DC converter when the second sampling voltage is less than a third voltage threshold. When the second sampled voltage is determined to be greater than or equal to the third voltage threshold, it is determined that the external device is not connected to the secondary side of the low-voltage DC / DC converter.

8. The charging system according to claim 7, characterized in that, The charging system also includes: A protection circuit is connected between the vehicle microcontroller and the second sampling circuit.

9. The charging system according to claim 8, characterized in that, The protection circuit includes: The fifth resistor, one end of which is connected to the vehicle microcontroller; A diode, one end of which is connected to the other end of the fifth resistor, and the other end of which is connected to one end of the third resistor.

10. The charging system according to claim 6, characterized in that, The external device includes: A battery management system control board, wherein the primary side of the battery management system control board is connected to the secondary side of the low-voltage DC / DC converter; The device battery, the positive and negative terminals of which are connected to the secondary side of the battery management system control board; The low-voltage DC / DC converter is configured to wake up the battery management system control board if it is determined that the external device is connected to the secondary side of the low-voltage DC / DC converter, and output a second voltage to the battery management system control board after the battery management system control board is woken up, so as to charge the device battery.

11. The charging system according to claim 9, characterized in that, The battery management system control board is connected to the secondary side of the low-voltage DC / DC converter via a signal line; The low-voltage DC / DC converter is configured to send a wake-up signal to the battery management system control board via the signal line to wake up the battery management system control board if it is determined that the external device is connected to the secondary side of the low-voltage DC / DC converter.

12. The charging system according to claim 10, characterized in that, The charging system further includes a first Bluetooth component connected to the vehicle microcontroller; the battery management system control board includes a second Bluetooth component; the vehicle microcontroller is also connected to the battery module. The vehicle microcontroller is used to collect the output current of the battery module. When the output current is greater than a preset current threshold, it sends a current control signal to the second Bluetooth component through the first Bluetooth component. The second Bluetooth component is used to transmit the current control signal to the low-voltage DC / DC converter; The low-voltage DC / DC converter is used to adjust the output power or stop supplying power to the external device according to the current control signal.

13. The charging system according to claim 1, characterized in that, The battery module includes: Power battery; A high-voltage DC / DC converter, wherein the primary side of the high-voltage DC / DC converter is connected to the power battery, for obtaining the high-voltage power output from the power battery; A startup battery is connected to the secondary side of the high-voltage DC / DC converter, and the startup battery is connected in parallel with the first sampling circuit. The high-voltage DC / DC converter is used to output a third voltage to power the startup battery based on the high-voltage power supply.

14. A vehicle, characterized in that, The vehicle includes a charging system as described in any one of claims 1-13.

15. A charging management system, characterized in that, The charging management system includes a charging system as described in any one of claims 1-13 and an external device, wherein the charging system is connected to the external device.

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