Fault detection module and device for battery fuse

Abstract

The utility model provides a fault detection module and device for a battery fuse. The module comprises a first diode, a second diode, a first isolation unit and a second isolation unit, the anode of the first diode is connected with the first end of the first battery fuse, and the cathode of the first diode is connected with the input end of the first isolation unit; the anode of the second diode is connected with the second end of the first battery fuse, and the cathode of the second diode is connected with the input end of the second isolation unit; the output end of the first isolation unit and the output end of the second isolation unit are connected with the processing module; the processing module is used for outputting a fuse fault signal when receiving the high level signal. According to the fault detection module, real-time fault detection of the battery fuse can be realized, and two sets of opposite detection structures are arranged, so that fault detection of the battery fuse can be realized no matter how two ends of the fuse are connected to the detection ports, and the accuracy and convenience of fault detection of the battery fuse are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery fuse's fault detection module and device. BACKGROUND

[0002] Battery fuse is a device used to protect the circuit from damage caused by excessive current. When the current in the circuit exceeds a safe level, the fuse automatically disconnects the circuit, preventing damage to the circuit and its components. Battery fuses are usually installed at the positive and negative output terminals of the battery to ensure that the current can be quickly cut off in abnormal conditions, avoiding equipment damage.

[0003] At present, the fault detection method of battery fuse is usually as follows: using a mechanical or digital multimeter, setting the multimeter to resistance position, connecting the two ends of the fuse, and checking the resistance value. If the resistance value is below 1 ohm, the fuse is normal; if the resistance value is above several tens of ohms, the fuse may be damaged. This method requires manual operation and can only determine whether the battery fuse is faulty during inspection, and cannot achieve real-time monitoring of battery fuse failure. SUMMARY

[0004] The utility model embodiment provides a battery fuse's fault detection module and device to solve the problem of battery fuse failure that cannot be monitored in real time.

[0005] In a first aspect, the utility model embodiment provides a battery fuse fault detection module, comprising: a first diode, a second diode, a detection port, a first isolation unit, a second isolation unit and a processing module.

[0006] The detection port includes a first access pin and a second access pin for connecting the two ends of the first battery fuse. The first battery fuse is the fuse of the first end of the battery module. The first end of the battery module is any one of the positive and negative terminals of the battery module.

[0007] The anode of the first diode is connected to the first access pin of the detection port, and the cathode of the first diode is connected to the input end of the first isolation unit. The anode of the second diode is connected to the second access pin of the detection port, and the cathode of the second diode is connected to the input end of the second isolation unit.

[0008] The output end of the first isolation unit and the output end of the second isolation unit are connected to the processing module.

[0009] The processing module is configured to output a fuse failure signal when a high-level signal is received.

[0010] In a possible implementation, the first isolation unit comprises a first optocoupler, a third diode and a fourth diode.

[0011] The positive input end of the first optocoupler is connected with the negative pole of the first diode and the negative pole of the third diode respectively; the negative input end of the first optocoupler is connected with the positive pole of the third diode and the second access pin of the detection port respectively; the positive output end of the first optocoupler is connected with the negative pole of the fourth diode and the first pin of the first input end of the processing module respectively; and the negative output end of the first optocoupler is connected with the positive pole of the fourth diode and the second pin of the first input end of the processing module respectively.

[0012] In a possible implementation, the second isolation unit comprises a second optocoupler, a fifth diode and a sixth diode.

[0013] The positive input end of the second optocoupler is connected with the negative pole of the second diode and the negative pole of the fifth diode respectively; the negative input end of the second optocoupler is connected with the positive pole of the fifth diode and the first access pin of the detection port respectively; the positive output end of the second optocoupler is connected with the negative pole of the sixth diode and the third pin of the first input end of the processing module respectively; and the negative output end of the second optocoupler is connected with the positive pole of the sixth diode and the second pin of the first input end of the processing module respectively.

[0014] In a possible implementation, the fuse fault detection module further comprises a first resistance unit.

[0015] The first end of the first resistance unit is connected with the negative pole of the first diode, and the second end of the first resistance unit is connected with the input end of the first isolation unit.

[0016] In a possible implementation, the first resistance unit comprises a first resistance, a second resistance, a third resistance and a fourth resistance.

[0017] The first end of the first resistance and the first end of the second resistance are connected with the first end of the first resistance unit respectively, the second end of the first resistance is connected with the first end of the third resistance, the second end of the second resistance is connected with the first end of the fourth resistance, and the second end of the third resistance and the second end of the fourth resistance are connected with the second end of the first resistance unit.

[0018] In a possible implementation, the fuse fault detection module further comprises a second resistance unit.

[0019] The first end of the second resistance unit is connected with the negative electrode of the second diode, and the second end of the second resistance unit is connected with the input end of the second isolation unit.

[0020] In a possible implementation, the second resistance unit comprises a fifth resistance and a sixth resistance.

[0021] The first end of the fifth resistance is connected with the first end of the second resistance unit, the second end of the fifth resistance is connected with the first end of the sixth resistance, and the second end of the sixth resistance is connected with the second end of the second resistance unit.

[0022] In a possible implementation, the fault detection module further comprises an alarm lamp.

[0023] The alarm lamp is connected with the processing module.

[0024] In a second aspect, the utility model provides a kind of fault detection device of battery fuse, it includes first fuse fault detection module and second fuse fault detection module;The first fuse fault detection module and the second fuse fault detection module all include the structure of the battery fuse fault detection module as described in the above first aspect;

[0025] The first fuse fault detection module is used to detect the fault of the fuse of battery module anode.

[0026] The second fuse fault detection module is used to detect the fault of the fuse of battery module cathode.

[0027] In a possible implementation, the battery fuse fault detection device further comprises a third resistance unit.

[0028] The first end of the third resistance unit is connected with the second access pin of the detection port in the first fuse fault detection module;The second end of the third resistance unit is connected with the first access pin of the detection port in the second fuse fault detection module.

[0029] The utility model discloses an embodiment provides a battery fuse's fault detection module, include: first diode, second diode, first isolation unit and second isolation unit, the positive pole of first diode is connected with the first end of first battery fuse, the negative pole of first diode is connected with the input of first isolation unit, the positive pole of second diode is connected with the second end of first battery fuse, the negative pole of second diode is connected with the input of second isolation unit, the output of first isolation unit and the output of second isolation unit are connected with processing module, processing module is used for when receiving high level signal output fuse fault signal, above-mentioned fault detection module can realize the real -time fault detection of battery fuse, and through setting two sets of opposite detection structure, no matter how the both ends of fuse are accessed detection port, can realize the fault detection of battery fuse, improves the accuracy and convenience of battery fuse fault detection. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment or the description of prior art needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0031] Figure 1 It is the structure schematic diagram of battery fuse's fault detection module provided by the utility model embodiment,

[0032] Figure 2 It is the circuit schematic diagram of battery fuse's fault detection module provided by the utility model embodiment,

[0033] Figure 3 It is the circuit schematic diagram of battery fuse's fault detection device provided by the utility model embodiment. DETAILED DESCRIPTION

[0034] In the following description, for the sake of explanation and not for the sake of limitation, specific details are set forth such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the utility model. However, it should be clear to those skilled in the art that the utility model can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted in order not to obscure the description of the utility model with unnecessary details.

[0035] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will be explained by specific embodiment with the drawings.

[0036] Referring to Figure 1It shows the structure schematic diagram of the fault detection module of the battery fuse provided by the utility model embodiment, and it comprises: first diode D5, second diode D7, detection port CN1, first isolation unit 10, second isolation unit 20 and processing module 30;

[0037] The detection port CN1 comprises a first access pin and a second access pin, and is used for connecting the two ends of the first battery fuse; the first battery fuse is the fuse of the first end of the battery module; the first end of the battery module is any one of the positive end and the negative end of the battery module;

[0038] The anode of the first diode D5 is connected with the first access pin of the detection port CN1, and the cathode of the first diode D5 is connected with the input end of the first isolation unit 10; the anode of the second diode D7 is connected with the second access pin of the detection port CN1, and the cathode of the second diode D7 is connected with the input end of the second isolation unit 20;

[0039] The output end of the first isolation unit 10 and the output end of the second isolation unit 20 are connected with the processing module 30;

[0040] The processing module 30 is used for outputting a fuse fault signal when a high-level signal is received.

[0041] In the embodiment, when the first access pin of the detection port CN1 accesses the front end of the first battery fuse and the second access pin accesses the rear end of the first battery fuse, if the first battery fuse is faulty, the front and rear ends of the first battery fuse will produce a forward voltage drop, the first diode D5 is turned on, the first isolation unit 10 sends a high-level signal to the processing module 30 after isolating and processing the signal, and the second diode D7 is not turned on; if the first battery fuse is normal, there is no voltage difference between the two ends of the first battery fuse, the first diode D5 and the second diode D7 are not turned on, and the processing module 30 obtains a low-level signal.

[0042] When the second access pin of the detection port CN1 accesses the rear end of the first battery fuse and the first access pin accesses the front end of the first battery fuse, if the first battery fuse is faulty, the front and rear ends of the first battery fuse will produce a reverse voltage drop, the second diode D7 is turned on, the second isolation unit 20 sends a high-level signal to the processing module 30 after isolating and processing the signal, and the first diode D5 is not turned on; if the first battery fuse is normal, there is no voltage difference between the two ends of the first battery fuse, the first diode D5 and the second diode D7 are not turned on, and the processing module 30 obtains a low-level signal.

[0043] In the embodiment, the first isolation unit 10 can be a pulse transformer isolation circuit, a relay isolation circuit and the like.

[0044] The fault detection module of the battery fuse can realize real-time fault detection of the battery fuse, and through the arrangement of two sets of opposite detection structures, the fault detection of the battery fuse can be realized regardless of how the two ends of the fuse are connected to the detection port CN1, thereby improving the accuracy and convenience of the fault detection of the battery fuse.

[0045] In a possible implementation manner, Figure 2 The circuit schematic diagram of the fault detection module of the battery fuse is shown in the embodiment of the utility model, as Figure 2 The first isolation unit 10 includes a first optoelectronic coupler IC1, a third diode D1 and a fourth diode D9.

[0046] The positive input end of the first optoelectronic coupler IC1 is connected with the negative pole of the first diode D5 and the negative pole of the third diode D1 respectively; the negative input end of the first optoelectronic coupler IC1 is connected with the positive pole of the third diode D1 and the second access pin of the detection port CN1 respectively; the positive output end of the first optoelectronic coupler IC1 is connected with the negative pole of the fourth diode D9 and the first input end CN3 first pin 1 of the processing module 30 respectively; the negative output end of the first optoelectronic coupler IC1 is connected with the positive pole of the fourth diode D9 and the first input end CN3 second pin 3 (GND) of the processing module 30 respectively.

[0047] Specifically, the first optoelectronic coupler IC1 can be an external circuit optoelectronic coupler, which is composed of a light-emitting diode and a photosensitive triode, and the positive pole of the light-emitting diode is the positive input end of the first optoelectronic coupler IC1, and the negative pole of the light-emitting diode is the negative input end of the first optoelectronic coupler IC1; the collector of the photosensitive triode is the positive output end of the first optoelectronic coupler IC1, and the emitter of the photosensitive triode is the negative output end of the first optoelectronic coupler IC1.

[0048] Specifically, the positive output end of the first optoelectronic coupler IC1 is connected with the first pin of the first input end CN3 of the processing module 30 through a resistor R18.

[0049] In a possible implementation manner, referring to Figure 2 The second isolation unit 20 includes a second optoelectronic coupler IC2, a fifth diode D3 and a sixth diode D10.

[0050] The positive input end of the second optoelectronic coupler IC2 is connected with the negative electrode of the second diode D7 and the negative electrode of the fifth diode D3 respectively; the negative input end of the second optoelectronic coupler IC2 is connected with the positive electrode of the fifth diode D3 and the first access pin of the detection port CN1 respectively; the positive output end of the second optoelectronic coupler IC2 is connected with the negative electrode of the sixth diode D10 and the first input end CN3 third pin 2 of the processing module 30 respectively; the negative output end of the second optoelectronic coupler IC2 is connected with the positive electrode of the sixth diode D10 and the first input end CN3 second pin 3 of the processing module 30 respectively.

[0051] Specifically, the second optoelectronic coupler IC2 can be an external circuit optoelectronic coupler, which is composed of a light-emitting diode and a photosensitive triode, and the positive electrode of the light-emitting diode is the positive input end of the second optoelectronic coupler IC2, and the negative electrode of the light-emitting diode is the negative input end of the second optoelectronic coupler IC2; the collector of the photosensitive triode is the positive output end of the second optoelectronic coupler IC2, and the emitter of the photosensitive triode is the negative output end of the second optoelectronic coupler IC2.

[0052] Specifically, the positive output end of the second optoelectronic coupler IC2 is connected with the third pin of the first input end CN3 of the processing module 30 through the resistor R19.

[0053] In a possible implementation, the fuse failure detection module further includes a first resistance unit;

[0054] The first end of the first resistance unit is connected with the negative electrode of the first diode D5, and the second end of the first resistance unit is connected with the input end of the first isolation unit 10.

[0055] In the embodiment, the voltage signal input is divided by the first resistance unit, so that the voltage signal input into the first optoelectronic coupler IC1 meets the requirements of the device.

[0056] Specifically, the first resistance unit can include a plurality of resistors connected in series.

[0057] In a possible implementation, with reference to Figure 2 , the first resistance unit includes a first resistor R6, a second resistor R10, a third resistor R5 and a fourth resistor R9;

[0058] The first end of the first resistor R6 and the first end of the second resistor R10 are connected with the first end of the first resistor unit respectively, the second end of the first resistor R6 is connected with the first end of the third resistor R5, the second end of the second resistor R10 is connected with the first end of the fourth resistor R9, and the second end of the third resistor R5 and the second end of the fourth resistor R9 are connected with the second end of the first resistor unit.

[0059] In a possible implementation, the fuse failure detection module further comprises a second resistor unit;

[0060] The first end of the second resistor unit is connected with the negative electrode of the second diode D7, and the second end of the second resistor unit is connected with the input end of the second isolation unit 20.

[0061] In the embodiment, the voltage signal input is divided by the second resistor unit, so that the voltage signal input into the second optocoupler IC2 meets the requirements of the device.

[0062] Specifically, the second resistor unit can comprise a plurality of resistors connected in series.

[0063] In a possible implementation, with reference to Figure 2 , the second resistor unit comprises a fifth resistor R15 and a sixth resistor R13.

[0064] The first end of the fifth resistor R15 is connected with the first end of the second resistor unit, the second end of the fifth resistor R15 is connected with the first end of the sixth resistor R13, and the second end of the sixth resistor R13 is connected with the second end of the second resistor unit.

[0065] In a possible implementation, the failure detection module further comprises an alarm lamp.

[0066] The alarm lamp is connected with the processing module 30.

[0067] In the embodiment, the alarm lamp can be an audible and visual alarm lamp, when the processing module 30 detects a high-level signal, outputs a high-level signal to the audible and visual alarm lamp, the audible and visual alarm lamp works under high level and stops working under low level, thereby reminding the user of the fuse failure of the battery.

[0068] The second aspect, Figure 3 The failure detection device of the battery fuse is shown, with reference to Figure 3 , the failure detection device of the battery fuse comprises:

[0069] The first fuse fault detection module and the second fuse fault detection module; the first fuse fault detection module and the second fuse fault detection module each comprise the structure of the fuse fault detection module of the battery fuse as described in the first aspect above;

[0070] The first fuse fault detection module is configured to detect the fault of the fuse of the positive electrode of the battery module.

[0071] The second fuse fault detection module is configured to detect the fault of the fuse of the negative electrode of the battery module.

[0072] In the embodiment, as shown in Figure 3 , the structure of the first fuse fault detection module is the same as that of the fuse fault detection module in Figure 2 .

[0073] Specifically, the second fuse fault detection module comprises:

[0074] a diode D2, a diode D4, a detection port CN2, a third isolation unit, a fourth isolation unit, and a processing module 30.

[0075] The detection port CN2 comprises a first access pin and a second access pin, and is configured to connect two ends of the negative electrode battery fuse.

[0076] The positive electrode of the diode D2 is connected to the first access pin of the detection port CN2, and the negative electrode of the diode D2 is connected to the input end of the third isolation unit; the positive electrode of the diode D4 is connected to the second access pin of the detection port CN2, and the negative electrode of the diode D4 is connected to the input end of the fourth isolation unit.

[0077] The output end of the third isolation unit and the output end of the fourth isolation unit are each connected to the processing module 30.

[0078] The processing module 30 is configured to output a fuse fault signal of the negative electrode battery fuse when a high-level signal is received.

[0079] In one possible implementation, referring to Figure 3 , the third isolation unit comprises an optoelectronic coupler IC3, a diode D6, and a diode D12.

[0080] The positive input end of the optoelectronic coupler IC3 is connected with the negative electrode of the diode D2 and the negative electrode of the diode D6 respectively; the negative input end of the optoelectronic coupler IC3 is connected with the positive electrode of the diode D6 and the second access pin of the detection port CN2 respectively; the positive output end of the optoelectronic coupler IC3 is connected with the negative electrode of the diode D12 and the second input end first pin of the processing module 30 respectively; the negative output end of the optoelectronic coupler IC3 is connected with the positive electrode of the diode D12 and the second input end second pin of the processing module 30 respectively.

[0081] In a possible implementation, referring to Figure 3 , the fourth isolation unit comprises a second optoelectronic coupler IC4, a diode D8 and a diode D11;

[0082] The positive input end of the second optoelectronic coupler IC4 is connected with the negative electrode of the diode D4 and the negative electrode of the diode D8 respectively; the negative input end of the second optoelectronic coupler IC4 is connected with the positive electrode of the diode D8 and the first access pin of the detection port CN2 respectively; the positive output end of the second optoelectronic coupler IC4 is connected with the negative electrode of the diode D11 and the second input end third pin of the processing module 30 respectively; the negative output end of the second optoelectronic coupler IC4 is connected with the positive electrode of the diode D11 and the second input end second pin of the processing module 30 respectively.

[0083] In a possible implementation, the fuse failure detection module further comprises a first resistance unit;

[0084] The first end of the first resistance unit is connected with the negative electrode of the first diode, and the second end of the first resistance unit is connected with the input end of the third isolation unit.

[0085] In a possible implementation, referring to Figure 3 , the first resistance unit comprises a resistance R12, a resistance R8, a resistance R11 and a resistance R7;

[0086] The first end of the resistance R12 and the first end of the resistance R8 are connected with the first end of the first resistance unit respectively, the second end of the resistance R12 is connected with the first end of the resistance R11, the second end of the resistance R8 is connected with the first end of the resistance R7, and the second end of the resistance R11 and the second end of the resistance R7 are connected with the second end of the first resistance unit.

[0087] In a possible implementation, the fuse failure detection module further comprises a second resistance unit;

[0088] The first end of the second resistance unit is connected with the negative electrode of the diode D4, and the second end of the second resistance unit is connected with the input end of the fourth isolation unit.

[0089] In one possible implementation, referring to Figure 3 , the second resistance unit comprises a fifth resistance R14 and a sixth resistance R16.

[0090] The first end of the fifth resistance R14 is connected with the first end of the second resistance unit, the second end of the fifth resistance R14 is connected with the first end of the sixth resistance R16, and the second end of the sixth resistance R16 is connected with the second end of the second resistance unit.

[0091] In the embodiment, the positive and negative electrodes of the battery module are both provided with fuses, and the fuse fault detection module is connected at both ends of the positive and negative electrode fuses of the battery module, so that the fault of the fuses at both ends is detected.

[0092] In one possible implementation, the fuse fault detection device of the battery fuse further comprises a third resistance unit.

[0093] The first end of the third resistance unit is connected with the second access pin of the detection port CN1 in the first fuse fault detection module, and the second end of the third resistance unit is connected with the first access pin of the detection port CN2 in the second fuse fault detection module.

[0094] In the embodiment, the third resistance unit plays a role of discharging, prevents the fuse from being triggered or not triggered due to interference signals, or prevents the voltage at both ends from being close to 0V after the fuse is disconnected and suspended, and ensures that there is a voltage difference at both ends after the fuse is fused.

[0095] In the embodiment, as shown in Figure 3 , the third resistance unit comprises resistances R1, R2, R3 and R4, the first end of the resistance R1 and the first end of the resistance R2 are both connected with the second access pin of the detection port CN1 of the first fuse fault detection module, the second end of the resistance R1 is connected with the first end of the resistance R3, the second end of the resistance R2 is connected with the first end of the resistance R4, and the second ends of the resistances R3 and R4 are both connected with the first access pin of the detection port CN1 of the second fuse fault detection module.

[0096] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A fault detection module for a battery fuse, characterized in that, include: The system comprises a first diode, a second diode, a detection port, a first isolation unit, a second isolation unit, and a processing module. The detection port includes a first access pin and a second access pin, used to connect to the two ends of a first battery fuse; the first battery fuse is the fuse at the first end of the battery module; the first end of the battery module is either the positive terminal or the negative terminal of the battery module. The anode of the first diode is connected to the first access pin of the detection port, and the cathode of the first diode is connected to the input terminal of the first isolation unit; the anode of the second diode is connected to the second access pin of the detection port, and the cathode of the second diode is connected to the input terminal of the second isolation unit. The output terminals of both the first isolation unit and the second isolation unit are connected to the processing module; The processing module is used to output a fuse fault signal when a high-level signal is received.

2. The battery fuse fault detection module according to claim 1, characterized in that, The first isolation unit includes a first optocoupler, a third diode, and a fourth diode; The positive input terminal of the first optocoupler is connected to the negative terminal of the first diode and the negative terminal of the third diode, respectively; the negative input terminal of the first optocoupler is connected to the positive terminal of the third diode and the second access pin of the detection port, respectively; the positive output terminal of the first optocoupler is connected to the negative terminal of the fourth diode and the first pin of the first input terminal of the processing module, respectively; the negative output terminal of the first optocoupler is connected to the positive terminal of the fourth diode and the second pin of the first input terminal of the processing module, respectively.

3. The battery fuse fault detection module according to claim 1, characterized in that, The second isolation unit includes a second optocoupler, a fifth diode, and a sixth diode; The positive input terminal of the second optocoupler is connected to the negative terminal of the second diode and the negative terminal of the fifth diode, respectively; the negative input terminal of the second optocoupler is connected to the positive terminal of the fifth diode and the first access pin of the detection port, respectively; the positive output terminal of the second optocoupler is connected to the negative terminal of the sixth diode and the third pin of the first input terminal of the processing module, respectively; the negative output terminal of the second optocoupler is connected to the positive terminal of the sixth diode and the second pin of the first input terminal of the processing module, respectively.

4. The battery fuse fault detection module according to claim 1, characterized in that, The fuse fault detection module also includes a first resistor unit; The first end of the first resistor unit is connected to the negative terminal of the first diode, and the second end of the first resistor unit is connected to the input terminal of the first isolation unit.

5. The battery fuse fault detection module according to claim 4, characterized in that, The first resistor unit includes a first resistor, a second resistor, a third resistor, and a fourth resistor; The first end of the first resistor and the first end of the second resistor are respectively connected to the first end of the first resistor unit. The second end of the first resistor is connected to the first end of the third resistor. The second end of the second resistor is connected to the first end of the fourth resistor. The second ends of the third resistor and the fourth resistor are both connected to the second end of the first resistor unit.

6. The battery fuse fault detection module according to claim 1, characterized in that, The fuse fault detection module also includes a second resistor unit; The first end of the second resistor unit is connected to the negative terminal of the second diode, and the second end of the second resistor unit is connected to the input terminal of the second isolation unit.

7. The battery fuse fault detection module according to claim 6, characterized in that, The second resistor unit includes a fifth resistor and a sixth resistor; The first end of the fifth resistor is connected to the first end of the second resistor unit, the second end of the fifth resistor is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to the second end of the second resistor unit.

8. The battery fuse fault detection module according to claim 1, characterized in that, The fault detection module also includes an alarm light; The alarm light is connected to the processing module.

9. A fault detection device for a battery fuse, characterized in that, It includes a first fuse fault detection module and a second fuse fault detection module; both the first fuse fault detection module and the second fuse fault detection module include the structure of the battery fuse fault detection module as described in any one of claims 1 to 8; The first fuse fault detection module is used to detect faults in the fuse at the positive terminal of the battery module. The second fuse fault detection module is used to detect faults in the fuse at the negative terminal of the battery module.

10. The battery fuse fault detection device according to claim 9, characterized in that, The fault detection device for the battery fuse also includes a third resistor unit; The first end of the third resistor unit is connected to the second access pin of the detection port in the first fuse fault detection module; the second end of the third resistor unit is connected to the first access pin of the detection port in the second fuse fault detection module.

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