Current anomaly detection circuit, detection method and vehicle

Abstract

The invention relates to a current anomaly detection circuit, a current anomaly detection method and a vehicle. The current anomaly detection circuit comprises a switch module, a detection module and a control module, the switch module is connected in series between the load and the power module; the detection module is connected in a power supply loop of the load and the power module and used for detecting power supply parameters of the power module to the load; the control module is electrically connected with the switch module; the control module is used for controlling the switch module to be switched off under the condition that the power supply parameters meet the abnormal conditions. The power supply parameters of the power supply module to the load are detected in real time through the detection module, the control module judges the detected power supply parameters, and when the power supply parameters meet the abnormal conditions, the switch module is controlled to be switched off, so that power supply of the power supply module to the load is cut off. Therefore, the abnormal condition of the load is detected in real time, and the power supply of the power supply module to the load can be cut off according to the abnormal condition, so that the risk of spontaneous combustion caused by abnormal power supply of the load is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of current anomaly detection technology, specifically to a current anomaly detection circuit, detection method, and vehicle. Background Technology

[0002] With the continuous development of society and the economy, automobiles have become an indispensable part of people's lives, and the automobile controller is an extremely important component of automobiles. Existing automobile controllers lack the function of detecting abnormal current during load operation. Therefore, when the load's operating current becomes abnormal, the automobile controller cannot judge the abnormal situation and cannot adjust the power supply to the load accordingly. This creates a risk of the vehicle spontaneously combusting due to abnormal load current. Summary of the Invention

[0003] To address the aforementioned technical problems, this disclosure provides a current anomaly detection circuit, detection method, and vehicle.

[0004] This disclosure provides a current anomaly detection circuit, including: a switching module, a detection module, and a control module;

[0005] The switching module is connected in series between the load and the power supply module;

[0006] The detection module is connected in the power supply circuit of the load and power module; the control module is electrically connected to the switch module.

[0007] Optionally, the detection module includes: a current detection feedback circuit and a current detection acquisition circuit;

[0008] The current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module.

[0009] Optionally, the current detection feedback circuit includes a current detection unit, a comparison unit, and a gating unit;

[0010] The detection terminal of the current detection unit is electrically connected to the power supply terminal of the load, the output terminal of the current detection unit is electrically connected to the non-inverting input terminal of the comparison unit, and the output terminal of the comparison unit is electrically connected to the control terminal of the gating unit. The different output potentials of the output terminals of the comparison units result in different conduction loops of the gating unit. The gating unit is located between the connection node of the current detection feedback circuit and the current detection acquisition circuit and the ground terminal.

[0011] Optionally, the current sensing unit includes a current sensing resistor and an amplifier; the comparison unit includes a first comparator and a second comparator; the gating unit includes a first branch, a second branch, and a third branch connected in parallel between the acquisition node and the ground terminal; the first branch includes a first switching unit and a first voltage divider resistor connected in series; the second branch includes a second switching unit and a second voltage divider resistor connected in series; the third branch includes a third voltage divider resistor;

[0012] The current-sensing resistor is connected in series between the load and the switching module. The first end of the current-sensing resistor is electrically connected to the non-inverting input of the amplifier, and the second end of the current-sensing resistor is electrically connected to the inverting input of the amplifier. The output of the amplifier is electrically connected to both the non-inverting inputs of the first comparator and the second comparator. The potential at the inverting input of the first comparator is equal to the minimum operating voltage of the load. The potential at the inverting input of the second comparator is equal to the maximum operating voltage of the load. The output of the first comparator is electrically connected to the control terminal of the first switching unit. The output of the second comparator is electrically connected to the control terminal of the second switching unit.

[0013] Optionally, the current detection feedback circuit further includes a first power supply unit, a fourth voltage divider resistor, a fifth voltage divider resistor, a sixth voltage divider resistor, and a seventh voltage divider resistor;

[0014] The inverting input terminal of the amplifier is electrically connected to the first terminal of the first power supply unit. The power supply terminals of the amplifier, the first comparator, and the second comparator are all electrically connected to the second terminal of the first power supply unit. The second terminal of the first power supply unit is also electrically connected to the first terminal of the fourth voltage divider resistor. The second terminal of the fourth voltage divider resistor is electrically connected to the inverting input terminal of the first comparator. The inverting input terminal of the first comparator is grounded through the fifth voltage divider resistor. The second terminal of the first power supply unit is also electrically connected to the first terminal of the sixth voltage divider resistor. The second terminal of the sixth voltage divider resistor is electrically connected to the inverting input terminal of the second comparator. The inverting input terminal of the second comparator is grounded through the seventh voltage divider resistor.

[0015] Optionally, the current detection and acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital acquisition unit.

[0016] The eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the analog-to-digital acquisition unit.

[0017] Optionally, the current detection and acquisition circuit further includes a first diode; the positive terminal of the first diode is electrically connected to the positive terminal of the second power supply unit, and the negative terminal of the first diode is electrically connected to the current limiting resistor.

[0018] Optionally, the current detection and acquisition circuit further includes a second diode; the positive terminal of the second diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor, and the negative terminal of the second diode is electrically connected to the positive terminal of the second power supply unit.

[0019] Optionally, the current detection and acquisition circuit further includes a third diode; the positive terminal of the third diode is grounded, and the negative terminal of the third diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor.

[0020] This disclosure also provides a current anomaly detection method, applicable to any of the current anomaly detection circuits described above, the method comprising:

[0021] Obtain the power supply parameters of the power module to the load;

[0022] If the power supply parameters are determined to meet abnormal conditions, the switching module is controlled to disconnect.

[0023] Optionally, determining that the power supply parameters meet abnormal conditions and controlling the switching module to disconnect includes:

[0024] Once the power supply parameters reach the first threshold detection voltage, the switching module is controlled to disconnect.

[0025] Wherein, the first threshold detection voltage is the voltage value detected by the detection module when the power supply current of the power module reaches the maximum operating current of the load.

[0026] Optionally, the detection module includes: a current detection feedback circuit and a current detection acquisition circuit; the current detection acquisition circuit is connected in series between the load and the power supply module; the current detection feedback circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit also includes a first diode; the positive terminal of the first diode is electrically connected to the positive terminal of the second power supply unit, and the negative terminal of the first diode is electrically connected to the current limiting resistor;

[0027] The method further includes:

[0028] Based on the acquisition voltage of the analog-to-digital acquisition unit, it reaches It is determined that the signal harness of the detection module is short-circuited to the positive terminal of the power supply module;

[0029] Among them, V BAT+ R1 is the positive voltage value of the power module, R8 is the resistance value of the eighth voltage divider resistor, and R9 is the resistance value of the ninth voltage divider resistor.

[0030] Optionally, the detection module includes: a current detection feedback circuit and a current detection acquisition circuit; the current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit further includes a first diode; the anode of the first diode is electrically connected to the anode of the second power supply unit, and the cathode of the first diode is electrically connected to the current limiting resistor; the current detection acquisition circuit further includes a second diode; the anode of the second diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor, and the cathode of the second diode is electrically connected to the anode of the power supply module;

[0031] The method further includes:

[0032] Based on the acquisition voltage of the analog-to-digital acquisition unit reaching V1, it is determined that the signal harness of the detection module is short-circuited with the positive terminal of the power supply module; where V1 is the power supply voltage value of the second power supply unit.

[0033] Optionally, the detection module includes: a current detection feedback circuit and a current detection acquisition circuit; the current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit also includes a third diode; the positive terminal of the third diode is grounded, and the negative terminal of the third diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor;

[0034] The method further includes:

[0035] Based on the acquisition voltage of the analog-to-digital acquisition unit, it reaches It is determined that the signal harness of the detection module is short-circuited with the negative terminal of the power supply module;

[0036] Among them, V BAT- R8 is the negative voltage value of the power module, R9 is the resistance value of the eighth voltage divider resistor, and R9 is the resistance value of the ninth voltage divider resistor.

[0037] Optionally, the detection module includes: a current detection feedback circuit and a current detection acquisition circuit; the current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit also includes a first diode; the anode of the first diode is electrically connected to the anode of the second power supply unit, and the cathode of the first diode is electrically connected to the current limiting resistor;

[0038] The method further includes:

[0039] Based on the acquisition voltage of the analog-to-digital acquisition unit, it reaches It was determined that the signal harness of the detection module was open-circuited;

[0040] Where V1 is the power supply voltage value of the second power supply unit, V D R1 is the voltage drop across the first diode, R8 is the resistance of the eighth voltage divider resistor, R9 is the resistance of the ninth voltage divider resistor, and R0 is the resistance of the current-limiting resistor.

[0041] This disclosure also provides a vehicle including a current anomaly detection circuit as described in any of the above.

[0042] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0043] In the solution provided by this disclosure, a switch module is provided between the load and the power supply module. The switch module can cut off the power supply from the power supply module to the load. During the operation of the load, a detection module connected in the power supply circuit between the load and the power supply module detects the power supply parameters of the power supply module to the load in real time and sends the power supply parameters to the control module. The control module judges the detected power supply parameters. The control module is electrically connected to the switch module. When the power supply parameters meet abnormal conditions, the control module controls the switch module to open, thereby cutting off the power supply from the power supply module to the load. Thus, this disclosure achieves real-time detection of abnormal load conditions by detecting the power supply parameters of the power supply module to the load through the detection module and judging the power supply parameters through the control module. It can also cut off the power supply from the power supply module to the load according to the abnormal load conditions, avoiding the problem of load temperature rise due to abnormal load power supply and reducing the risk of spontaneous combustion of the load due to excessive temperature. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0045] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A circuit diagram of a current anomaly detection circuit provided in an embodiment of this disclosure;

[0047] Figure 2 A circuit diagram of yet another current anomaly detection circuit provided in an embodiment of this disclosure;

[0048] Figure 3 A circuit diagram of yet another current anomaly detection circuit provided in an embodiment of this disclosure;

[0049] Figure 4 A circuit diagram of yet another current anomaly detection circuit provided in an embodiment of this disclosure;

[0050] Figure 5 A circuit diagram of yet another current anomaly detection circuit provided in an embodiment of this disclosure;

[0051] Figure 6 A circuit diagram of yet another current anomaly detection circuit provided in an embodiment of this disclosure;

[0052] Figure 7A circuit diagram of yet another current anomaly detection circuit provided in an embodiment of this disclosure;

[0053] Figure 8 A circuit diagram of yet another current anomaly detection circuit provided in an embodiment of this disclosure;

[0054] Figure 9 A circuit diagram of a preferred current anomaly detection circuit provided in an embodiment of this disclosure;

[0055] Figure 10 A schematic flowchart of a current anomaly detection method provided in this embodiment of the present disclosure;

[0056] Figure 11 This is a circuit diagram of another current anomaly detection circuit provided in an embodiment of the present disclosure. Detailed Implementation

[0057] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0058] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0059] Figure 1 This is a circuit diagram of a current anomaly detection circuit provided in an embodiment of the present disclosure, as shown below. Figure 1 As shown, the current abnormality detection circuit includes: a switching module 100, a detection module 200, and a control module 300.

[0060] A switch module 100 is connected in series between a load 400 and a power supply module 500; a detection module 200 is connected in the power supply circuit between the load 400 and the power supply module 500 to detect the power supply parameters of the power supply module 500 to the load 400; a control module 300 is electrically connected to the switch module 100; the control module 300 is used to control the switch module 100 to disconnect when the power supply parameters meet abnormal conditions.

[0061] For example, the power supply parameters could be, for instance, the supply current from the power module 500 to the load 400. A switch module 100 is connected in series between the load 400 and the power module 500. The switch module 100 is also electrically connected to the control module 300, which can control the switching module 100 to turn on and off, thereby enabling the power supply from the power module 500 to the load 400 to be switched on or off. The detection module 200 is connected in the power supply circuit between the load 400 and the power supply module 500. The detection module 200 is used to detect the power supply current provided by the power supply module 500 to the load 400 in real time. The detection module 200 is also electrically connected to the control module 300. The detection module 200 sends the detected power supply current to the control module 300. The control module 300 judges the detected power supply current. An abnormal condition can be, for example, the power supply current exceeds the power supply current threshold. When the detected power supply current meets the abnormal condition, it is confirmed that the load 400 is in an abnormal overcurrent operation. The control module 300 controls the switch module 100 to turn off, thereby cutting off the power supply from the power supply module 500 to the load 400. Therefore, this disclosure uses the detection module 200 to detect the power supply parameters of the power module 500 to the load 400, and the control module 300 to judge the power supply parameters to realize the real-time detection of abnormal conditions of the load 400. It can also cut off the power supply of the power module 500 to the load 400 according to the abnormal condition of the load 400, so as to avoid the problem of the load 400 temperature rising due to abnormal power supply and reduce the risk of the load 400 spontaneously combusting due to excessive temperature.

[0062] It should be noted that the power supply parameters can be other than the power supply current of the power module to the load. The specific power supply parameters need to be set according to the actual situation, and no specific restrictions are made here.

[0063] It should be noted that abnormal conditions can also be other abnormal conditions besides the power supply current exceeding the power supply current threshold. The specific abnormal conditions need to be set according to the power supply parameters being detected, and no specific limitations are made here.

[0064] Figure 2 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 2 As shown, the detection module 200 includes a current detection feedback circuit 210 and a current detection acquisition circuit 220; wherein, the current detection feedback circuit 210 is connected in series between the load 400 and the power supply module 500; the current detection acquisition circuit 220 is electrically connected to the control module 300; the potential of the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 is different depending on the power supply parameters.

[0065] For example, the current detection feedback circuit 210 is connected in series between the load 400 and the power module 500. The current detection feedback circuit 210 is provided with multiple switching units (not shown in the figure). The current detection feedback circuit 210 is electrically connected to the current detection acquisition circuit 220 through multiple switching units connected in parallel or in series. The current detection feedback circuit 210 detects the power supply parameters provided by the power module 500 to the load 400, and turns on or off the corresponding switching units according to the detected power supply parameters. This causes the potential of the current detection acquisition circuit 220 and the current detection feedback circuit 210 at the connection node to change when different switching units are turned on or off. The current detection and acquisition circuit 220 collects the potential at the connection node and sends the collected potential to the control module 300. The control module 300 compares the collected potential with a preset potential threshold. When the potential equals the preset potential threshold, it determines that the power supply parameters provided by the power module 500 to the load 400 meet abnormal conditions. The control module 300 then controls the switch module 100 to turn off, thereby cutting off the power supply from the power module 500 to the load 400. Therefore, this disclosure improves detection efficiency by detecting the potential at the connection node between the current detection feedback circuit 210 and the current detection and acquisition circuit 220. When the potential meets preset conditions, it can directly determine that there is an abnormality in the power supply from the power module 500 to the load 400. Furthermore, cutting off the power supply from the power module 500 to the load 400 based on the abnormal power supply can avoid the problem of the load 400's temperature rising due to abnormal power supply, reducing the risk of the load 400 spontaneously combusting due to overheating.

[0066] Figure 3 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 3 As shown, the current detection feedback circuit 210 includes a current detection unit 211, a comparison unit 212, and a gating unit 213. The detection terminal 2111 of the current detection unit 211 is electrically connected to the power supply terminal 401 of the load 400, the output terminal 2112 of the current detection unit 211 is electrically connected to the non-inverting input terminal 2121 of the comparison unit 212, and the output terminal 2122 of the comparison unit 212 is electrically connected to the control terminal 2131 of the gating unit 213. Different output potentials of the output terminal 2122 of the comparison unit 212 result in different conduction loops of the gating unit 213. The gating unit 213 is located between the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 and the ground terminal.

[0067] Specifically, the detection terminal 2111 of the current detection unit 211 is electrically connected to the power supply terminal 401 of the load 400. The power supply terminal 401 of the load 400 is also electrically connected to the power supply module 500 through the switch module 100. The current detection unit 211 can detect the current supplied by the power supply module 500 to the load 400 through its detection terminal 2111. After calculating the detected current, it obtains the corresponding voltage value and outputs this voltage value through its output terminal 2112 to the non-inverting input terminal 2121 of the comparison unit 212. The inverting input terminal (not shown in the figure) of the comparison unit 212 is set with a voltage threshold. The voltage value obtained by the non-inverting input terminal 2121 of the comparison unit 212 is compared with the voltage threshold of the inverting input terminal of the comparison unit 212, and the result is processed by the comparison unit 212. The output terminal 2122 outputs a high-potential signal or a low-potential signal to the control terminal 2131 of the selection unit 213 to control the selection unit 213 to connect to different conduction loops. The selection unit 213 is electrically connected to the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220. As a result, when the selection unit 213 connects to different conduction loops, the potential of the connection node is different. The current detection acquisition circuit 220 acquires the potential of the connection node and outputs it to the control module 300. The control module 300 compares the acquired potential with the preset potential threshold. When the potential is equal to the preset potential threshold, it is determined that the power supply parameters provided by the power module 500 to the load 400 meet the abnormal conditions. The control module 300 controls the switch module 100 to turn off, thereby cutting off the power supply from the power module 500 to the load 400. This disclosure uses a current detection unit 211 to monitor the current supplied by the power module 500 to the load 400 in real time. When the current is too high, the comparison unit 212 outputs a corresponding level signal to control the gating unit to connect different conduction loops, thereby causing a change in the potential of the connection node between the current detection feedback circuit 210 and the current detection acquisition circuit 220. The control module 300 can determine whether the operating state of the load 400 is abnormal based on the potential of the connection node, and control the switch module 100 to disconnect based on the abnormal operating state of the load 400. Thus, this disclosure enables direct detection of the supply current to the load 400 and disconnection of the power supply to the load 400 based on abnormal supply current, avoiding the problem of the load 400 overheating and reducing the risk of the load 400 spontaneously combusting due to overheating.

[0068] Figure 4 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 4As shown, the current sensing unit includes a current sensing resistor R and an amplifier U1; the comparison unit includes a first comparator U2 and a second comparator U3; the gating unit includes a first branch, a second branch, and a third branch connected in parallel between the acquisition node and the ground terminal; the first branch includes a first switching unit Q1 and a first voltage divider resistor R1 connected in series; the second branch includes a second switching unit Q2 and a second voltage divider resistor R2 connected in series; and the third branch includes a third voltage divider resistor R3.

[0069] A current-sensing resistor R is connected in series between the load 400 and the switching module 100. The first end of the current-sensing resistor R is electrically connected to the non-inverting input of the amplifier U1, and the second end of the current-sensing resistor R is electrically connected to the inverting input of the amplifier U1. The output of the amplifier U1 is electrically connected to the non-inverting inputs of the first comparator U2 and the second comparator U3, respectively. The potential of the inverting input of the first comparator U2 is equal to the minimum operating voltage of the load 400. The potential of the inverting input of the second comparator U3 is equal to the maximum operating voltage of the load 400. The output of the first comparator U2 is electrically connected to the control terminal of the first switching unit Q1. The output of the second comparator U3 is electrically connected to the control terminal of the second switching unit Q2.

[0070] For example, the first switching unit Q1 and the second switching unit Q2 are NMOS transistors. The current sensing resistor R is connected in series between the load 400 and the switching module 100 to detect the supply current provided by the switching module 100 to the load 400. The amplifier U1 converts the supply current collected by the current sensing resistor R into the current through the formula V0=I*R. 检流电阻 *K calculates the output voltage value V0, where I is the supply current obtained from the current sensing resistor R, and R 检流电阻 Let R be the resistance value of the current sensing resistor, and K be the gain coefficient of amplifier U1. Therefore, the voltage value V0 output by amplifier U1 can be regarded as the operating voltage of load 400.

[0071] When the operating current of the load 400 is less than the normal operating current, the voltage output of the amplifier U1 is less than the minimum operating voltage of the load 400. The voltage received at the non-inverting input of the first comparator U2 is less than the voltage at the inverting input of the first comparator U2. Therefore, the first comparator U2 outputs a low-level signal, and the first switch unit Q1 is turned off. The voltage received at the non-inverting input of the second comparator U3 is less than the voltage at the inverting input of the second comparator U3. Therefore, the second comparator U3 outputs a low-level signal, and the second switch unit Q2 is turned off. Only the third branch in the selection unit is turned on.

[0072] When the operating current of the load 400 is equal to the normal operating current, the voltage output of amplifier U1 is greater than the minimum operating voltage of the load 400 but less than the maximum operating voltage of the load 400. The voltage received at the non-inverting input of the first comparator U2 is greater than the voltage at the inverting input of the first comparator U2, so the first comparator U2 outputs a high-level signal, and the first switching unit Q1 is turned on. The voltage received at the non-inverting input of the second comparator U3 is less than the voltage at the inverting input of the second comparator U3, so the second comparator U3 outputs a low-level signal, the second switching unit Q2 is turned off, and the first and third branches in the selection unit are turned on.

[0073] When the operating current of the load 400 is greater than the normal operating current, the voltage output of the amplifier U1 is greater than the maximum operating voltage of the load 400. The voltage received at the non-inverting input of the first comparator U2 is greater than the voltage at the inverting input of the first comparator U2. Therefore, the first comparator U2 outputs a high-level signal, and the first switching unit Q1 is turned on. The voltage received at the non-inverting input of the second comparator U3 is greater than the voltage at the inverting input of the second comparator U3. Therefore, the second comparator U3 outputs a high-level signal, and the second switching unit Q2 is turned on. The first branch, the second branch, and the third branch in the selection unit are turned on.

[0074] Therefore, this disclosure detects the power supply current supplied by the power module 500 to the load 400 through the current sensing resistor R, and calculates and amplifies the current detected by the current sensing resistor R through the amplifier U1 to obtain the operating voltage of the load 400. Then, the voltage output by the amplifier U1 is compared by the first comparator U2 and the second comparator U3 to distinguish the operating state of the load 400, and controls the conduction of different branches in the conduction unit according to the operating state of the load 400.

[0075] It should be noted that the first switching unit Q1 and the second switching unit Q2 can also be other switching units besides NMOS transistors, and no specific limitation is made here.

[0076] In some embodiments, see continue to see Figure 4 The current detection feedback circuit also includes a first power supply unit U4, a fourth voltage divider resistor R4, a fifth voltage divider resistor R5, a sixth voltage divider resistor R6, and a seventh voltage divider resistor R7.

[0077] The inverting input terminal of amplifier U1 is electrically connected to the first terminal of the first power supply unit U4. The power supply terminals of amplifier U1, first comparator U2, and second comparator U3 are all electrically connected to the second terminal of the first power supply unit U4. The second terminal of the first power supply unit U4 is also electrically connected to the first terminal of the fourth voltage divider resistor R4. The second terminal of the fourth voltage divider resistor R4 is electrically connected to the inverting input terminal of the first comparator U2. The inverting input terminal of the first comparator U2 is grounded through the fifth voltage divider resistor R5. The second terminal of the first power supply unit U4 is also electrically connected to the first terminal of the sixth voltage divider resistor R6. The second terminal of the sixth voltage divider resistor R6 is electrically connected to the inverting input terminal of the second comparator U3. The inverting input terminal of the second comparator U3 is grounded through the seventh voltage divider resistor R7.

[0078] Specifically, the first power supply unit U4 provides operating voltage to amplifier U1, first comparator U2, and second comparator U3. The second terminal of the first power supply unit U4 is electrically connected to the inverting input terminal of the first comparator U2 through the fourth voltage divider resistor R4. The inverting input terminal of the first comparator U2 is grounded through the fifth voltage divider resistor R5. Thus, the voltage division from the first power supply unit U4 to the inverting input terminal of the first comparator U2 can be adjusted by adjusting the resistance values ​​of the fourth voltage divider resistor R4 and the fifth voltage divider resistor R5, so that the potential of the inverting input terminal of the first comparator U2 is equal to the minimum operating voltage of the load 400. The second terminal of the first power supply unit U4 is also electrically connected to the inverting input terminal of the second comparator U3 through the sixth voltage divider resistor R6. The inverting input terminal of the second comparator U3 is grounded through the seventh voltage divider resistor R7. Thus, the voltage division from the first power supply unit U4 to the inverting input terminal of the second comparator U3 can be adjusted by adjusting the resistance values ​​of the sixth voltage divider resistor R6 and the seventh voltage divider resistor R7, so that the potential of the inverting input terminal of the second comparator U3 is equal to the maximum operating voltage of the load 400.

[0079] Figure 5 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 5 As shown, the current detection and acquisition circuit 220 includes a second power supply unit U5, an eighth voltage divider resistor R8, a ninth voltage divider resistor R9, a current limiting resistor R0, and an analog-to-digital acquisition unit U6. The eighth voltage divider resistor R8, the ninth voltage divider resistor R9, and the current limiting resistor R0 are connected in series in the power supply circuit of the second power supply unit U5; the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 is electrically connected to the analog-to-digital acquisition unit U6.

[0080] Specifically, the positive terminal of the second power supply unit U5 is electrically connected to the analog-to-digital acquisition unit U6, and the negative terminal of the second power supply unit U5 is grounded. The second power supply unit U5 provides power supply voltage to the analog-to-digital acquisition unit U6. The current detection feedback circuit 210 is equipped with multiple switching units (not shown in the figure). The current detection feedback circuit 210 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 through multiple switching units connected in parallel or series. The current detection feedback circuit 210 detects the power supply parameters provided by the power module 500 to the load 400, and turns on or off the corresponding switching units according to the detected power supply parameters. This results in different conductive circuits connected to the connection nodes of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 when different switching units are turned on or off. Consequently, when the second power supply unit U5 supplies power to the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, the current shunted to the current detection feedback circuit 210 through the connection nodes of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 is different. This leads to different voltage divisions at the connection nodes of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, thus causing a change in the potential at the connection nodes between the current detection acquisition circuit 220 and the current detection feedback circuit 210.

[0081] Figure 6 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 6 As shown, the current detection and acquisition circuit 220 also includes a first diode D1; the positive terminal of the first diode D1 is electrically connected to the positive terminal of the second power supply unit U5, and the negative terminal of the first diode D1 is electrically connected to the current limiting resistor R0.

[0082] Specifically, the current detection feedback circuit 210 and the current detection acquisition circuit 220 are electrically connected via a signal harness. When a short circuit fault occurs between the signal harness and the positive terminal of the power module 500, since the positive voltage of the power module 500 is greater than the supply voltage provided by the positive terminal of the second power supply unit U5, a current will flow from the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the second power supply unit U5. This disclosure provides a first diode D1, with its anode electrically connected to the positive terminal of the second power supply unit U5 and its cathode electrically connected to the current-limiting resistor R0. This reverses the flow of current from the positive terminal of the power module 500 through the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the second power supply unit U5, thus preventing damage to the second power supply unit U5.

[0083] Figure 7 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 7As shown, the current detection and acquisition circuit 220 also includes a second diode D2; the positive terminal of the second diode D2 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and the negative terminal of the second diode D2 is electrically connected to the positive terminal of the second power supply unit U5.

[0084] For example, the second diode D2 can be a clamping diode. The current detection feedback circuit 210 and the current detection acquisition circuit 220 are electrically connected through a signal harness. When a short circuit fault occurs between the signal harness and the positive terminal of the power module 500, the supply voltage of the power module 500 is greater than the supply voltage of the second power supply unit U5, causing the voltage division at the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 to increase. This disclosure provides a second diode D2, with the positive terminal of the second diode D2 electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and the negative terminal of the second diode D2 electrically connected to the positive terminal of the second power supply unit U5. The second diode D2 can shunt the current flowing from the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the analog-to-digital acquisition unit U6, thereby limiting the potential of the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 and preventing the voltage acquired by the analog-to-digital acquisition unit U6 from exceeding the range of the analog-to-digital acquisition unit U6.

[0085] Figure 8 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 8 As shown, the current detection and acquisition circuit 220 also includes a third diode D3; the positive terminal of the third diode D3 is grounded, and the negative terminal of the third diode D3 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9.

[0086] For example, the third diode D3 can be a clamping diode. The current detection feedback circuit 210 and the current detection acquisition circuit 220 are electrically connected through a signal harness. When a short circuit fault occurs between the signal harness and the negative terminal of the power module 500, if the negative terminal of the power module 500 has a negative voltage, a current will be generated flowing from the ground terminal connected to the ninth voltage divider resistor R9 to the connection node between the current detection feedback circuit 210 and the current detection acquisition circuit 220. The negative voltage of the negative terminal of the power module 500 will be divided by the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The analog-to-digital acquisition unit U6 will then detect this divided negative voltage. This disclosure provides a third diode D3, with its positive terminal grounded and its negative terminal electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The third diode D3 can divert the current flowing from the grounded terminal connected to the ninth voltage divider resistor R9 to the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220, thereby preventing the negative potential of the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 from exceeding the negative voltage tolerance value of the analog-to-digital acquisition unit U6.

[0087] In some embodiments, Figure 9 A circuit diagram of a preferred current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 9 As shown, the current abnormality detection circuit includes: a switch module 100, a control module 300, a current sensing resistor R, an amplifier U1, a first comparator U2, a second comparator U3, a first switch unit Q1, a first voltage divider resistor R1, a second switch unit Q2, a second voltage divider resistor R2, a third voltage divider resistor R3, a first power supply unit U4, a fourth voltage divider resistor R4, a fifth voltage divider resistor R5, a sixth voltage divider resistor R6, a seventh voltage divider resistor R7, a second power supply unit U5, an eighth voltage divider resistor R8, a ninth voltage divider resistor R9, a current limiting resistor R0, an analog-to-digital acquisition unit U6, a filter capacitor C1, a first diode D1, a second diode D2, and a third diode D3.

[0088] A switch module 100 is connected in series between the load 400 and the power supply module 500. A control module 300 is electrically connected to the switch module 100. A current-sensing resistor R is connected in series between the load 400 and the switch module 100. The first end of the current-sensing resistor R is electrically connected to the non-inverting input of amplifier U1, and the second end of the current-sensing resistor R is electrically connected to the inverting input of amplifier U1. The output of amplifier U1 is electrically connected to the non-inverting inputs of both the first comparator U2 and the second comparator U3. The output of the first comparator U2 is electrically connected to the control terminal of the first switching unit Q1. The output of the second comparator U3 is electrically connected to the control terminal of the second switching unit Q2. The inverting input terminal of amplifier U1 is electrically connected to the first terminal of the first power supply unit U4. The power supply terminals of amplifier U1, first comparator U2, and second comparator U3 are all electrically connected to the second terminal of the first power supply unit U4. The second terminal of the first power supply unit U4 is also electrically connected to the inverting input terminal of the first comparator U2 through the fourth voltage divider resistor R4. The inverting input terminal of the first comparator U2 is grounded through the fifth voltage divider resistor R5. The second terminal of the first power supply unit U4 is also electrically connected to the inverting input terminal of the second comparator U3 through the sixth voltage divider resistor R6. The inverting input terminal of the second comparator U3 is grounded through the seventh voltage divider resistor R7.

[0089] The eighth voltage divider resistor R8, the ninth voltage divider resistor R9, and the current-limiting resistor R0 are connected in series in the power supply circuit of the second power supply unit U5; the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 is electrically connected to the analog-to-digital acquisition unit U6; the anode of the first diode D1 is electrically connected to the anode of the second power supply unit U5, and the cathode of the first diode D1 is electrically connected to the current-limiting resistor R0; the anode of the second diode D2 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and the cathode of the second diode D2 is electrically connected to the anode of the second power supply unit U5; the anode of the third diode D3 is grounded, and the cathode of the third diode D3 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9; the filter capacitor C1 is connected in parallel with the third diode D3; and the analog-to-digital acquisition unit U6 is also electrically connected to the control module 300.

[0090] For example, the first switching unit Q1 and the second switching unit Q2 are NMOS transistors. The current sensing resistor R is connected in series between the load 400 and the switching module 100 to detect the supply current provided by the switching module 100 to the load 400. The amplifier U1 converts the supply current collected by the current sensing resistor R into the current through the formula V0=I*R. 检流电阻 *K calculates the output voltage value V0, where I is the supply current obtained from the current sensing resistor R, and R 检流电阻Let R be the resistance value of the current sensing resistor, and K be the gain coefficient of amplifier U1. Therefore, the voltage V0 output by amplifier U1 can be considered as the operating voltage of load 400. The potential at the inverting input of the first comparator U2 is equal to the minimum operating voltage of load 400; the potential at the inverting input of the second comparator U3 is equal to the maximum operating voltage of load 400.

[0091] The first terminal of the third voltage divider resistor R3 is electrically connected to the eighth voltage divider resistor R8 via a signal harness, and the second terminal of the third voltage divider resistor R3 is grounded. When the third voltage divider resistor R3 is just electrically connected to the eighth voltage divider resistor R8 via the signal harness, the switch module 100 is not yet turned on. At this time, only the third voltage divider resistor R3 is connected to the power supply circuit of the second power supply unit U5. The current output by the second power supply unit U5 is divided into two after passing through the first diode D1 and the current limiting resistor R0. One part of the current flows to the ground terminal through the third voltage divider resistor R3, and the other part of the current flows to the ground terminal through the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. Therefore, the voltage value acquired by the analog-to-digital acquisition unit U6 is:

[0092]

[0093] Among them, V ADC0 V1 is the voltage value acquired by the analog-to-digital acquisition unit U6, and V2 is the voltage value provided by the second power supply unit U5. D R1 is the voltage drop across the first diode D1, R3 is the resistance of the third voltage divider resistor R3, R8 is the resistance of the eighth voltage divider resistor R8, R9 is the resistance of the ninth voltage divider resistor R9, and R0 is the resistance of the current-limiting resistor R0.

[0094] When the operating current of the load 400 is less than the normal operating current, the voltage output of amplifier U1 is less than the minimum operating voltage of the load 400. The voltage received at the non-inverting input of the first comparator U2 is less than the voltage at the inverting input of the first comparator U2, therefore the first comparator U2 outputs a low-level signal, and the first switch unit Q1 is disconnected. The voltage received at the non-inverting input of the second comparator U3 is less than the voltage at the inverting input of the second comparator U3, therefore the second comparator U3 outputs a low-level signal, and the second switch unit Q2 is disconnected. At this time, only the third voltage divider resistor R3 is connected to the power supply circuit of the second power supply unit U5. The current output by the second power supply unit U5 is divided into two after passing through the first diode D1 and the current limiting resistor R0. One part of the current flows to the ground terminal through the third voltage divider resistor R3, and the other part of the current flows to the ground terminal through the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. Therefore, the voltage value acquired by the analog-to-digital acquisition unit U6 is:

[0095]

[0096] Among them, VADC1 V1 is the voltage value acquired by the analog-to-digital acquisition unit U6, and V2 is the voltage value provided by the second power supply unit U5. D R1 is the voltage drop across the first diode D1, R3 is the resistance of the third voltage divider resistor R3, R8 is the resistance of the eighth voltage divider resistor R8, R9 is the resistance of the ninth voltage divider resistor R9, and R0 is the resistance of the current-limiting resistor R0.

[0097] V ADC0 With V ADC1 The values ​​are equal, therefore, to distinguish V ADC0 and V ADC1 The corresponding load operating state: when the third voltage divider resistor R3 is electrically connected to the eighth voltage divider resistor R8 through the signal harness, the control module obtains the voltage V from the analog-to-digital acquisition unit U6. ADC0 At this time, confirm that the third voltage divider resistor R3 and the eighth voltage divider resistor R8 are connected. Then, turn on the switch module 100. If the control module 300 receives a voltage of V from the analog-to-digital acquisition unit U6 at this time... ADC1 If the control module 300 determines that the operating current of the load 400 is less than the normal operating current, then the control module 300 will determine that the operating current of the load 400 is less than the normal operating current.

[0098] When the operating current of the load 400 is equal to the normal operating current, the voltage output of amplifier U1 is greater than the minimum operating voltage of the load 400 but less than the maximum operating voltage of the load 400. The voltage received at the non-inverting input of the first comparator U2 is greater than the voltage at the inverting input of the first comparator U2, therefore the first comparator U2 outputs a high-level signal, and the first switching unit Q1 is turned on. The voltage received at the non-inverting input of the second comparator U3 is less than the voltage at the inverting input of the second comparator U3, therefore the second comparator U3 outputs a low-level signal. At this time, the first voltage divider resistor R1 and the third voltage divider resistor R3 are connected to the power supply circuit of the second power supply unit U5. The current output by the second power supply unit U5 is divided into three parts after passing through the first diode D1 and the current limiting resistor R0. One part of the current flows to the ground through the first voltage divider resistor R1, one part of the current flows to the ground through the third voltage divider resistor R3, and one part of the current flows to the ground through the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. Thus, the voltage value acquired by the analog-to-digital acquisition unit U6 is:

[0099]

[0100] in, V ADC2 V1 is the voltage value acquired by the analog-to-digital acquisition unit U6, and V2 is the voltage value provided by the second power supply unit U5. DR1 is the voltage drop across the first diode D1, R3 is the resistance of the first voltage divider resistor R1, R8 is the resistance of the eighth voltage divider resistor R8, R9 is the resistance of the ninth voltage divider resistor R9, and R0 is the resistance of the current-limiting resistor R0. Therefore, when the control module 300 receives a voltage of V from the analog-to-digital acquisition unit U6... ADC2 When this happens, the control module 300 determines that the operating current of the load 400 is equal to the normal operating current.

[0101] When the operating current of the load 400 is greater than the normal operating current, the voltage output of the amplifier U1 is greater than the maximum operating voltage of the load 400. The voltage received at the non-inverting input of the first comparator U2 is greater than the voltage at the inverting input of the first comparator U2. Therefore, the first comparator U2 outputs a high-level signal, and the first switching unit Q1 is turned on. The voltage received at the non-inverting input of the second comparator U3 is greater than the voltage at the inverting input of the second comparator U3. Therefore, the second comparator U3 outputs a high-level signal, and the second switching unit Q2 is turned on. At this time, the first voltage divider resistor R1, the second voltage divider resistor R2, and the third voltage divider resistor R3 are all connected to the power supply circuit of the second power supply unit U5. The current output from the second power supply unit U5, after passing through the first diode D1 and the current-limiting resistor R0, is divided into four parts. One part of the current flows to the ground terminal through the first voltage divider resistor R1, one part flows to the ground terminal through the second voltage divider resistor R2, one part flows to the ground terminal through the third voltage divider resistor R3, and one part flows to the ground terminal through the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. Therefore, the voltage value acquired by the analog-to-digital acquisition unit U6 is:

[0102]

[0103] in, V ADC3 V1 is the voltage value acquired by the analog-to-digital acquisition unit U6, and V2 is the voltage value provided by the second power supply unit U5. D R1 is the voltage drop across the first diode D1, R2 is the resistance of the first voltage divider resistor R1, R3 is the resistance of the third voltage divider resistor R3, R8 is the resistance of the eighth voltage divider resistor R8, R9 is the resistance of the ninth voltage divider resistor R9, and R0 is the resistance of the current-limiting resistor R0. Therefore, when the control module 300 receives a voltage of V from the analog-to-digital acquisition unit U6... ADC3 If the operating current of the load 400 is greater than the normal operating current, the control module 300 will control the switch module 100 to turn off, thereby cutting off the power supply from the power module 500 to the load 400.

[0104] This disclosure uses a current-sensing resistor R to detect the supply current from the power module 500 to the load 400. An amplifier U1 amplifies the current detected by the current-sensing resistor R to obtain the operating voltage of the load 400. The voltage output from the amplifier U1 is then compared using a first comparator U2 and a second comparator U3. Based on the comparison result, the first switching unit Q1 and the second switching unit Q2 are controlled to conduct, resulting in different voltage divider resistors in the conductive circuit connected to the second power supply unit U5. This leads to different voltages acquired by the analog-to-digital converter U6. The control module determines the operating state of the load 400 based on the different voltage values ​​acquired by the analog-to-digital converter U6. When an abnormal operating state of the load 400 is detected, the control module 300 controls the switching module 100 to turn off, thereby cutting off the power supply from the power module 500 to the load 400. This prevents the load 400 from overheating due to abnormal power supply and reduces the risk of spontaneous combustion due to excessive heat.

[0105] It should be noted that the first switching unit Q1 and the second switching unit Q2 can also be other switching units besides NMOS transistors, and no specific limitation is made here.

[0106] For example, the first end of the third voltage divider resistor R3 is electrically connected to the eighth voltage divider resistor R8 through a signal harness, and the second end of the third voltage divider resistor R3 is grounded.

[0107] When a short circuit occurs between the signal harness and the positive terminal of the power module 500, because the positive voltage of the power module 500 is greater than the supply voltage provided by the positive terminal of the second power supply unit U5, a current will flow from the connection node of the third voltage divider resistor R3 and the eighth voltage divider resistor R8 to the second power supply unit U5. This disclosure provides a first diode D1, with its anode electrically connected to the positive terminal of the second power supply unit U5 and its cathode electrically connected to the current-limiting resistor R0. This reverses the flow of current from the positive terminal of the power module 500 through the connection node of the third voltage divider resistor R3 and the eighth voltage divider resistor R8 to the second power supply unit U5, thus preventing damage to the second power supply unit U5.

[0108] The second diode D2 can be a clamping diode. When a short circuit fault occurs between the signal harness and the positive terminal of the power module 500, the supply voltage of the power module 500 is greater than the supply voltage of the second power supply unit U5, causing the voltage division at the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 to increase. This disclosure provides a second diode D2, with its anode electrically connected to the connection node of the eighth and ninth voltage divider resistors R8 and R9, and its cathode electrically connected to the positive terminal of the second power supply unit U5. The second diode D2 can shunt the current flowing from the connection node of the third voltage divider resistor R3 and the eighth voltage divider resistor R8 to the analog-to-digital acquisition unit U6, thereby limiting the potential of the connection node of the eighth and ninth voltage divider resistors R8 and preventing the voltage acquired by the analog-to-digital acquisition unit U6 from exceeding its range.

[0109] The third diode D3 can be a clamping diode. When a short circuit fault occurs between the signal harness and the negative terminal of the power module 500, if the negative terminal of the power module 500 has a negative voltage, a current will flow from the ground terminal connected to the ninth voltage divider resistor R9 to the connection node of the third voltage divider resistor R3 and the eighth voltage divider resistor R8. The negative voltage of the negative terminal of the power module 500 will be divided by the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The analog-to-digital acquisition unit U6 will detect this divided negative voltage. This disclosure provides a third diode D3, with its positive terminal grounded and its negative terminal electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The third diode D3 can shunt the current flowing from the ground terminal connected to the ninth voltage divider resistor R9 to the connection node of the third voltage divider resistor R3 and the eighth voltage divider resistor R8, thereby preventing the negative potential of the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 from exceeding the negative voltage tolerance value of the analog-to-digital acquisition unit U6.

[0110] This disclosure also provides a vehicle including any of the above-mentioned current anomaly detection circuits.

[0111] The vehicles disclosed in the above embodiments have the same or corresponding beneficial effects as the current abnormality detection circuits disclosed in the above embodiments. To avoid repetition, they will not be described again here.

[0112] Figure 10 This is a flowchart illustrating a current anomaly detection method provided in an embodiment of this disclosure. The current anomaly detection method is applicable to any of the current anomaly detection circuits described above, such as... Figure 10 As shown, the method includes: S610 and S620.

[0113] S610: Obtain the power supply parameters of the power module to the load.

[0114] S620: If the power supply parameters meet the abnormal conditions, the control switch module will be disconnected.

[0115] For example, the power supply parameters can be, for instance, the power supply current from the power module to the load. The detection module is used to detect the power supply current from the power module to the load in real time. The detection module sends the detected power supply current to the control module, thereby enabling the control module to obtain the power supply parameters from the power module to the load. The control module judges the obtained power supply current. An abnormal condition can be, for example, the power supply current exceeding the power supply current threshold. When the obtained power supply current meets the abnormal condition, it is confirmed that the load is experiencing an overcurrent abnormal operation. The control module controls the switch module to turn off, thereby cutting off the power supply from the power module to the load. Thus, this disclosure uses the detection module to detect the power supply parameters from the power module to the load, thereby enabling the control module to obtain the power supply parameters from the power module to the load. By judging the power supply parameters, the control module can achieve real-time detection of abnormal load conditions and cut off the power supply from the power module to the load according to the abnormal load conditions, avoiding the problem of load temperature rise due to abnormal load power supply and reducing the risk of spontaneous combustion of the load due to excessive temperature.

[0116] It should be noted that the power supply parameters can be other than the power supply current of the power module to the load. The specific power supply parameters need to be set according to the actual situation, and no specific restrictions are made here.

[0117] It should be noted that abnormal conditions can also be other abnormal conditions besides the power supply current exceeding the power supply current threshold. The specific abnormal conditions need to be set according to the power supply parameters being detected, and no specific limitations are made here.

[0118] In some embodiments, determining that the power supply parameters meet abnormal conditions and controlling the switch module to disconnect includes:

[0119] Once the power supply parameters reach the first threshold detection voltage, the control switch module is disconnected; wherein, the first threshold detection voltage is the voltage value detected by the detection module when the power supply current of the power module reaches the maximum operating current of the load.

[0120] Specifically, the detection module is used to detect the supply current provided by the power module to the load in real time. The detection module has different connection branches, and it determines whether to activate the corresponding connection branch based on the magnitude of the supply current, thereby changing the output voltage value. The control module detects the voltage value output by the detection module and compares it with a first threshold detection voltage. When the detected voltage value reaches the first threshold detection voltage, it is considered that the supply current provided by the power module to the load is too large, determining that the supply parameters meet abnormal conditions. The control module then controls the switching module to disconnect, thereby cutting off the power supply from the power module to the load. Thus, this disclosure uses the detection module to detect the supply current of the power module to the load and switches the activation of the connection branches within the detection module according to the supply current, thereby enabling the control module to obtain the voltage value output by the detection module. The voltage value output by the detection module is the supply parameter. By comparing the voltage value with the first threshold detection voltage, the control module determines whether the supply parameters meet abnormal conditions. When the supply parameters reach the first threshold detection voltage, the control module determines that the supply parameters are abnormal, thereby cutting off the power supply from the power module to the load, avoiding the problem of load temperature rise due to abnormal load power supply, and reducing the risk of spontaneous combustion of the load due to excessive temperature.

[0121] In some embodiments, Figure 11 A circuit diagram of another current anomaly detection circuit provided in this disclosure embodiment is shown below. Figure 11 As shown, the detection module includes: a current detection feedback circuit 210 and a current detection acquisition circuit 220; the current detection feedback circuit 210 is connected in series between the load 400 and the power supply module 500; the current detection acquisition circuit 220 is electrically connected to the control module 300; the current detection acquisition circuit 220 includes a second power supply unit U5, an eighth voltage divider resistor R8, a ninth voltage divider resistor R9, a current limiting resistor R0, and an analog-to-digital acquisition unit U6; the eighth voltage divider resistor R8, the ninth voltage divider resistor R9, and the current limiting resistor R0 are connected in series in the power supply circuit of the second power supply unit U5; the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 is electrically connected to the analog-to-digital acquisition unit U6; the current detection acquisition circuit 220 also includes a first diode D1; the positive terminal of the first diode D1 is electrically connected to the positive terminal of the second power supply unit U5, and the negative terminal of the first diode D1 is electrically connected to the current limiting resistor R0.

[0122] The current anomaly detection method also includes: based on the acquisition voltage of the analog-to-digital acquisition unit U6 reaching... It was determined that the signal harness of the detection module was short-circuited to the positive terminal of the power supply module 500; where V BAT+ R1 is the positive voltage value of power module 500, R8 is the resistance value of the eighth voltage divider resistor R8, and R9 is the resistance value of the ninth voltage divider resistor R9.

[0123] Specifically, the current detection feedback circuit 210 and the current detection acquisition circuit 220 are electrically connected within the detection module via a signal harness. When a short circuit fault occurs between the signal harness and the positive terminal of the power module 500, because the positive voltage of the power module 500 is greater than the supply voltage provided by the positive terminal of the second power supply unit U5, a current will flow from the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the second power supply unit U5. This disclosure provides a first diode D1, with its anode electrically connected to the positive terminal of the second power supply unit U5 and its cathode electrically connected to the current-limiting resistor R0. This reverses the flow of current from the positive terminal of the power module 500 through the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the second power supply unit U5, thus preventing damage to the second power supply unit U5.

[0124] Furthermore, when a short circuit fault occurs between the signal harness and the positive terminal of the power module 500, a current will flow from the connection node between the current detection feedback circuit 210 and the current detection acquisition circuit 220 through the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 to the ground terminal. At this time, the positive voltage of the power module 500 will be divided by the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The analog-to-digital acquisition unit U6 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and acquires the voltage divided by the ninth voltage divider resistor R9. Therefore, when the acquisition voltage of the analog-to-digital acquisition unit U6 reaches... At that time, it was determined that the signal harness of the detection module was short-circuited with the positive terminal of the power supply module 500.

[0125] In some embodiments, see continue to see Figure 11 The detection module includes: a current detection feedback circuit 210 and a current detection acquisition circuit 220; the current detection feedback circuit 210 is connected in series between the load 400 and the power supply module 500; the current detection acquisition circuit 220 is electrically connected to the control module 300; the current detection acquisition circuit 220 includes a second power supply unit U5, an eighth voltage divider resistor R8, a ninth voltage divider resistor R9, a current limiting resistor R0, and an analog-to-digital acquisition unit U6; the eighth voltage divider resistor R8, the ninth voltage divider resistor R9, and the current limiting resistor R0 are connected in series in the power supply circuit of the second power supply unit U5; The connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 is electrically connected to the analog-to-digital acquisition unit U6; the current detection and acquisition circuit 220 also includes a first diode D1; the positive terminal of the first diode D1 is electrically connected to the positive terminal of the second power supply unit U5, and the negative terminal of the first diode D1 is electrically connected to the current limiting resistor R0; the current detection and acquisition circuit 220 also includes a second diode D2; the positive terminal of the second diode D2 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and the negative terminal of the second diode D2 is electrically connected to the positive terminal of the power module 500.

[0126] The current anomaly detection method also includes: determining that the signal harness of the detection module is short-circuited with the positive terminal of the power supply module 500 based on the acquisition voltage of the analog-to-digital acquisition unit U6 reaching V1; where V1 is the power supply voltage value of the second power supply unit U5.

[0127] Preferably, the current detection feedback circuit 210 and the current detection acquisition circuit 220 are electrically connected within the detection module via a signal harness. When a short circuit fault occurs between the signal harness and the positive terminal of the power module 500, since the positive voltage of the power module 500 is greater than the supply voltage provided by the positive terminal of the second power supply unit U5, a current will flow from the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the second power supply unit U5. This disclosure provides a first diode D1, with its anode electrically connected to the positive terminal of the second power supply unit U5 and its cathode electrically connected to the current-limiting resistor R0. This reverses the flow of current from the positive terminal of the power module 500 through the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the second power supply unit U5, thus preventing damage to the second power supply unit U5.

[0128] Furthermore, the second diode D2 can be a clamping diode. When a short circuit fault occurs between the signal harness and the positive terminal of the power module 500, the supply voltage of the power module 500 is greater than the supply voltage of the second power supply unit U5, causing the voltage division at the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 to increase. This disclosure provides a second diode D2, with its anode electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and its cathode electrically connected to the positive terminal of the second power supply unit U5. The second diode D2 can divert the current flowing from the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220 to the analog-to-digital acquisition unit U6, thereby limiting the potential of the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 and preventing the voltage acquired by the analog-to-digital acquisition unit U6 from exceeding its range.

[0129] Since the second diode D2 is a clamping diode, based on the working principle of a clamping diode, the voltage drop across the connection point of the eighth and ninth voltage divider resistors R8 and R9 can be adjusted to be greater than the supply voltage V1 of the second power supply unit U5 and the voltage drop V of the second diode D2. D The sum of these values ​​ensures that the second diode D2 is always conducting, and the analog-to-digital acquisition unit U6 directly acquires the supply voltage of the second power supply unit U5. Therefore, when the acquisition voltage of the analog-to-digital acquisition unit U6 reaches V1, it is determined that the signal harness of the detection module is short-circuited with the positive terminal of the power supply module 500.

[0130] In some embodiments, see continue to see Figure 11 The detection module includes a current detection feedback circuit 210 and a current detection acquisition circuit 220. The current detection feedback circuit 210 is connected in series between the load 400 and the power supply module 500. The current detection acquisition circuit 220 is electrically connected to the control module 300. The current detection acquisition circuit 220 includes a second power supply unit U5, an eighth voltage divider resistor R8, a ninth voltage divider resistor R9, a current limiting resistor R0, and an analog-to-digital acquisition unit U6. The eighth voltage divider resistor R8, the ninth voltage divider resistor R9, and the current limiting resistor R0 are connected in series in the power supply circuit of the second power supply unit U5. The connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 is electrically connected to the analog-to-digital acquisition unit U6. The current detection acquisition circuit 220 also includes a third diode D3. The positive terminal of the third diode D3 is grounded, and the negative terminal of the third diode D3 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9.

[0131] The current anomaly detection method also includes: based on the acquisition voltage of the analog-to-digital acquisition unit U6 reaching... It was determined that the signal harness of the detection module was short-circuited to the negative terminal of the power supply module 500; where V BAT- R1 is the negative voltage value of power module 500, R8 is the resistance value of the eighth voltage divider resistor R8, and R9 is the resistance value of the ninth voltage divider resistor R9.

[0132] Preferably, the third diode D3 can be a clamping diode. The current detection feedback circuit 210 and the current detection acquisition circuit 220 are electrically connected through a signal harness. When a short circuit fault occurs between the signal harness and the negative terminal of the power module 500, if the negative terminal of the power module 500 is at a negative voltage, a current will be generated flowing from the ground terminal connected to the ninth voltage divider resistor R9 to the connection node between the current detection feedback circuit 210 and the current detection acquisition circuit 220. The negative voltage of the negative terminal of the power module 500 will be divided by the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The analog-to-digital acquisition unit U6 will detect this part of the negative voltage that has been divided. This disclosure provides a third diode D3, with its positive terminal grounded and its negative terminal electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The third diode D3 can divert the current flowing from the grounded terminal connected to the ninth voltage divider resistor R9 to the connection node of the current detection feedback circuit 210 and the current detection acquisition circuit 220, thereby preventing the negative potential of the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 from exceeding the negative voltage tolerance value of the analog-to-digital acquisition unit U6.

[0133] When a short circuit occurs between the signal harness and the negative terminal of the power module 500, the negative voltage of the power module 500 will be divided by the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The analog-to-digital acquisition unit U6 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and acquires the voltage divided by the ninth voltage divider resistor R9. Therefore, when the acquisition voltage of the analog-to-digital acquisition unit U6 reaches... At that time, it was determined that the signal harness of the detection module was short-circuited with the negative terminal of the power supply module 500.

[0134] In some embodiments, see continue to see Figure 11 The detection module includes a current detection feedback circuit 210 and a current detection acquisition circuit 220. The current detection feedback circuit 210 is connected in series between the load 400 and the power supply module 500. The current detection acquisition circuit 220 is electrically connected to the control module 300. The current detection acquisition circuit 220 includes a second power supply unit U5, an eighth voltage divider resistor R8, a ninth voltage divider resistor R9, a current limiting resistor R0, and an analog-to-digital acquisition unit U6. The eighth voltage divider resistor R8, the ninth voltage divider resistor R9, and the current limiting resistor R0 are connected in series in the power supply circuit of the second power supply unit U5. The connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9 is electrically connected to the analog-to-digital acquisition unit U6. The current detection acquisition circuit 220 also includes a first diode D1. The positive terminal of the first diode D1 is electrically connected to the positive terminal of the second power supply unit U5, and the negative terminal of the first diode D1 is electrically connected to the current limiting resistor R0.

[0135] Current anomaly detection methods also include: based on the acquisition voltage of the analog-to-digital converter reaching... The signal harness of the detection module is determined to be open-circuited; where V1 is the power supply voltage value of the second power supply unit, V D R1 is the voltage drop across the first diode, R8 is the resistance of the eighth voltage divider resistor, R9 is the resistance of the ninth voltage divider resistor, and R0 is the resistance of the current-limiting resistor.

[0136] Specifically, the current detection feedback circuit 210 and the current detection acquisition circuit 220 are electrically connected via a signal harness. When a signal harness open circuit fault occurs, the current output by the second power supply unit U5, after passing through the first diode D1 and the current limiting resistor R0, flows out entirely through the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9. The analog-to-digital acquisition unit U6 is electrically connected to the connection node of the eighth voltage divider resistor R8 and the ninth voltage divider resistor R9, and acquires the voltage divided by the ninth voltage divider resistor R9. Therefore, when the acquisition voltage of the analog-to-digital acquisition unit U6 reaches... At that time, it was determined that the signal harness of the detection module had an open circuit fault.

[0137] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 apparatus 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 apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0138] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A current anomaly detection circuit, characterized in that, include: Switching module, detection module, and control module; The switching module is connected in series between the load and the power supply module; The detection module is connected in the power supply circuit of the load and power module; the control module is electrically connected to the switch module.

2. The current anomaly detection circuit according to claim 1, characterized in that, The detection module includes: a current detection feedback circuit and a current detection acquisition circuit; The current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module.

3. The current anomaly detection circuit according to claim 2, characterized in that, The current detection feedback circuit includes a current detection unit, a comparison unit, and a gating unit; The detection terminal of the current detection unit is electrically connected to the power supply terminal of the load, the output terminal of the current detection unit is electrically connected to the non-inverting input terminal of the comparison unit, and the output terminal of the comparison unit is electrically connected to the control terminal of the gating unit. The different output potentials of the output terminals of the comparison units result in different conduction loops of the gating unit. The gating unit is located between the connection node of the current detection feedback circuit and the current detection acquisition circuit and the ground terminal.

4. The current anomaly detection circuit according to claim 3, characterized in that, The current detection unit includes a current detection resistor and an amplifier; the comparison unit includes a first comparator and a second comparator; the gating unit includes a first branch, a second branch, and a third branch connected in parallel between the acquisition node and the ground terminal; the first branch includes a first switching unit and a first voltage divider resistor connected in series; the second branch includes a second switching unit and a second voltage divider resistor connected in series; the third branch includes a third voltage divider resistor; The current-sensing resistor is connected in series between the load and the switching module. The first end of the current-sensing resistor is electrically connected to the non-inverting input of the amplifier, and the second end of the current-sensing resistor is electrically connected to the inverting input of the amplifier. The output of the amplifier is electrically connected to both the non-inverting inputs of the first comparator and the second comparator. The potential at the inverting input of the first comparator is equal to the minimum operating voltage of the load. The potential at the inverting input of the second comparator is equal to the maximum operating voltage of the load. The output of the first comparator is electrically connected to the control terminal of the first switching unit. The output of the second comparator is electrically connected to the control terminal of the second switching unit.

5. The current anomaly detection circuit according to claim 4, characterized in that, The current detection feedback circuit also includes a first power supply unit, a fourth voltage divider resistor, a fifth voltage divider resistor, a sixth voltage divider resistor, and a seventh voltage divider resistor; The inverting input terminal of the amplifier is electrically connected to the first terminal of the first power supply unit. The power supply terminals of the amplifier, the first comparator, and the second comparator are all electrically connected to the second terminal of the first power supply unit. The second terminal of the first power supply unit is also electrically connected to the first terminal of the fourth voltage divider resistor. The second terminal of the fourth voltage divider resistor is electrically connected to the inverting input terminal of the first comparator. The inverting input terminal of the first comparator is grounded through the fifth voltage divider resistor. The second terminal of the first power supply unit is also electrically connected to the first terminal of the sixth voltage divider resistor. The second terminal of the sixth voltage divider resistor is electrically connected to the inverting input terminal of the second comparator. The inverting input terminal of the second comparator is grounded through the seventh voltage divider resistor.

6. The current anomaly detection circuit according to claim 2, characterized in that, The current detection and acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital acquisition unit. The eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the analog-to-digital acquisition unit.

7. The current anomaly detection circuit according to claim 6, characterized in that, The current detection and acquisition circuit further includes a first diode; the positive terminal of the first diode is electrically connected to the positive terminal of the second power supply unit, and the negative terminal of the first diode is electrically connected to the current limiting resistor.

8. The current anomaly detection circuit according to claim 6, characterized in that, The current detection and acquisition circuit also includes a second diode; the positive terminal of the second diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor, and the negative terminal of the second diode is electrically connected to the positive terminal of the second power supply unit.

9. The current anomaly detection circuit according to claim 6, characterized in that, The current detection and acquisition circuit also includes a third diode; the positive terminal of the third diode is grounded, and the negative terminal of the third diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor.

10. A method for detecting abnormal current, characterized in that, The method, applicable to the current anomaly detection circuit as described in any one of claims 1-9, comprises: Obtain the power supply parameters of the power module to the load; If the power supply parameters are determined to meet abnormal conditions, the switching module is controlled to disconnect.

11. The current anomaly detection method according to claim 10, characterized in that, The step of determining that the power supply parameters meet abnormal conditions and controlling the switching module to disconnect includes: Once the power supply parameters reach the first threshold detection voltage, the switching module is controlled to disconnect. Wherein, the first threshold detection voltage is the voltage value detected by the detection module when the power supply current of the power module reaches the maximum operating current of the load.

12. The current anomaly detection method according to claim 10, characterized in that, The detection module includes a current detection feedback circuit and a current detection acquisition circuit; the current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit also includes a first diode; the positive terminal of the first diode is electrically connected to the positive terminal of the second power supply unit, and the negative terminal of the first diode is electrically connected to the current limiting resistor; The method further includes: Based on the acquisition voltage of the analog-to-digital acquisition unit, it reaches It is determined that the signal harness of the detection module is short-circuited to the positive terminal of the power supply module; Among them, V BAT+ R1 is the positive voltage value of the power module, R8 is the resistance value of the eighth voltage divider resistor, and R9 is the resistance value of the ninth voltage divider resistor.

13. The current anomaly detection method according to claim 10, characterized in that, The detection module includes: a current detection feedback circuit and a current detection acquisition circuit; the current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit also includes a first diode; the anode of the first diode is electrically connected to the anode of the second power supply unit, and the cathode of the first diode is electrically connected to the current limiting resistor; the current detection acquisition circuit also includes a second diode; the anode of the second diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor, and the cathode of the second diode is electrically connected to the anode of the power supply module; The method further includes: Based on the acquisition voltage of the analog-to-digital acquisition unit reaching V1, it is determined that the signal harness of the detection module is short-circuited with the positive terminal of the power supply module; where V1 is the power supply voltage value of the second power supply unit.

14. The current anomaly detection method according to claim 10, characterized in that, The detection module includes a current detection feedback circuit and a current detection acquisition circuit; the current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit also includes a third diode; the positive terminal of the third diode is grounded, and the negative terminal of the third diode is electrically connected to the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor; The method further includes: Based on the acquisition voltage of the analog-to-digital acquisition unit, it reaches It is determined that the signal harness of the detection module is short-circuited with the negative terminal of the power supply module; Among them, V BAT- R8 is the negative voltage value of the power module, R9 is the resistance value of the eighth voltage divider resistor, and R9 is the resistance value of the ninth voltage divider resistor.

15. The current anomaly detection method according to claim 10, characterized in that, The detection module includes a current detection feedback circuit and a current detection acquisition circuit; the current detection feedback circuit is connected in series between the load and the power supply module; the current detection acquisition circuit is electrically connected to the control module; the current detection acquisition circuit includes a second power supply unit, an eighth voltage divider resistor, a ninth voltage divider resistor, a current limiting resistor, and an analog-to-digital (ADC) acquisition unit; the eighth voltage divider resistor, the ninth voltage divider resistor, and the current limiting resistor are connected in series in the power supply circuit of the second power supply unit; the connection node of the eighth voltage divider resistor and the ninth voltage divider resistor is electrically connected to the ADC acquisition unit; the current detection acquisition circuit also includes a first diode; the positive terminal of the first diode is electrically connected to the positive terminal of the second power supply unit, and the negative terminal of the first diode is electrically connected to the current limiting resistor; The method further includes: Based on the acquisition voltage of the analog-to-digital acquisition unit, it reaches It was determined that the signal harness of the detection module was open-circuited; Where V1 is the power supply voltage value of the second power supply unit, V D R1 is the voltage drop across the first diode, R8 is the resistance of the eighth voltage divider resistor, R9 is the resistance of the ninth voltage divider resistor, and R0 is the resistance of the current-limiting resistor.

16. A vehicle, characterized in that, Includes the current anomaly detection circuit as described in any one of claims 1-9.

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