TW201719998A - Battery disconnecting unit capable of determining abnormal conduction of switch and determining method thereof - Google Patents

Abstract

A battery disconnect unit capable of determining abnormal conduction of switch and determining method thereof. The battery disconnect unit includes a first switch, a second switch, and a processor. The first and the second switches are respectively set in a first current path and a second current path between a power and a loading. The first and the second switches are selectively conducted according to an enable signal. The processor electrically connected to at least one of the first current path and the second current path. When the enable signal instructs the first and the second switches switch to cut off, the processor determines whether the first or the second switches are abnormal conducted according to at least one voltage value of the first current path and the second current path and a preset voltage value. When one of the first or the second switches are abnormal conducted, the processor compares the voltage value of the first current path or the second current path and a preset voltage value, and determines whether the first switch is abnormal conducted or the second switch is abnormal conducted.

Description

Battery breaker capable of detecting abnormal switch conduction and detection method thereof

The invention relates to a battery breaker capable of detecting abnormal switch conduction and a detecting method thereof, in particular to a battery breaker suitable for an electric vehicle to determine whether the battery breaker switch of the electric vehicle is welded and not normally turned on Its detection method.

Conventional vehicles usually use burning gasoline as a power source. With the promotion of environmental protection concepts, in order to reduce the damage caused by burning gasoline and collecting oil, many research and resources are devoted to the development of electric vehicles. Although electric rafts use electricity as a source of power to reduce environmental damage, the battery capacity, charge and discharge efficiency, and system stability of their power systems are all related to the quality of electric vehicles.

In an electric vehicle power supply system, a battery breaker is usually provided on a current path of the power supply to the electric vehicle power, and the electric vehicle is controlled to be keyed or key off by the conduction or not of the battery breaker. However, when the user has controlled the battery breaker to be turned off, but the battery breaker is not normally turned on due to the switch fusion or other reasons, the power supply will continue to be supplied to the electric vehicle, thereby causing power consumption. The conventional battery breaker does not have a mechanism for detecting whether the switch is abnormally turned on, and the method of detecting whether the switch is turned on is usually to set a voltmeter at both ends of the switch, and to determine whether the switch is by measuring the voltage across the switch Turn on. However, if the battery breaker adopts this method, not only the number of detections is increased, but also a voltmeter needs to be added at both ends of each switch, thereby increasing the detection cost.

The invention provides a battery breaker capable of detecting that the switch is not normally turned on and a detecting method thereof, thereby solving the problem that the conventional battery breaker can not detect whether the switch of the battery breaker is abnormally turned on, thereby reducing the power of the electric vehicle. Unusual consumption situation.

The battery breaker capable of detecting that the switch is not normally turned on has a first switch, a second switch and a processor. The first switch is disposed at a first current path between the first end of the power source and the load, and is selectively turned on according to the enable signal. The second switch is disposed at a second current path between the second end of the power source and the load, and is selectively turned on according to the enable signal. The processor is electrically connected to one of the first current path and the second current path. When the enable signal indicates that the first switch and the second switch are switched to be off, the processor is configured according to one of the first current path and the second current path. The voltage value and the preset voltage value determine whether one of the first switch and the second switch is abnormally turned on, and when it is determined that one of the first switch and the second switch is abnormally turned on, the processor compares the first current path And determining, by the voltage value of one of the second current paths and the magnitude of the preset voltage value, that the first switch is abnormally turned on or the second switch is not normally turned on.

The method for detecting that the switch of the battery breaker is abnormally turned on is applicable to the battery breaker. The battery breaker has a first switch and a second switch, the first switch being disposed at a first current path between the first end of the power source and the load. The second switch is disposed at a second current path between the second end of the power source and the load. The battery breaker detecting switch is not normally turned on by the method of selectively turning on the first switch and the second switch according to the enabling signal. When the enable signal indicates that the first switch and the second switch are switched to be off, determining one of the first switch and the second switch according to the voltage value of one of the first current path and the second current path and the preset voltage value Is it not normally turned on? When it is determined that one of the first switch and the second switch is abnormally turned on, comparing a voltage value of one of the first current path and the second current path with a magnitude of the preset voltage value, determining that the first switch is abnormally turned on or The second switch is not normally turned on.

According to the above, the battery breaker and the detecting method thereof for detecting that the switch is abnormally turned on, the processor can detect the first voltage path and the voltage of the second current path, and can determine the first Whether one of the switch or the second switch is abnormally turned on, it can also be determined that the first switch is abnormally turned on or the second switch is not normally turned on, so that the battery breaker can detect whether the switch of the battery breaker is abnormally turned on, In turn, the power consumption of the electric vehicle is not normally consumed.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Please refer to FIG. 1. FIG. 1 is a schematic circuit diagram of a battery breaker according to an embodiment of the invention. As shown in FIG. 1, the battery breaker 10 has a first switch 11, a second switch 13, and a processor 15. The first switch 11 is disposed on the first current path P1 between the first end 21 of the power source 20 and the load 30, and is selectively turned on according to the enable signal. The second switch 13 is disposed on the second current path P2 between the second end 23 of the power source 20 and the load 30, and is selectively turned on according to the enable signal. The processor 15 is electrically connected to one of the first current path P1 and the second current path P2. When the enable signal indicates that the first switch 11 and the second switch 13 are switched to be off, the processor 15 is configured according to the first current path P1 and Determining whether one of the first switch 11 and the second switch 13 is abnormally turned on by the voltage value of one of the second current paths P2 and the preset voltage value, and determining one of the first switch 11 and the second switch 13 When the battery is not normally turned on, the processor 15 compares the voltage value of one of the first current path P1 and the second current path P2 with the magnitude of the preset voltage value, and determines that the first switch 11 is not normally turned on or the second switch 13 is not normally turned on. .

The first end 21 and the second end 23 of the power source 20 are, for example, a positive terminal and a negative terminal of the battery. The first switch 11 is used to conduct a current path between the positive terminal of the power source 20 and the load 30, and the second switch 13 is used to conduct a current path between the negative terminal of the power source 20 and the load 30. When the first switch 11 and the second switch 13 are welded by heat or other factors, the positive or negative terminals of the power source 20 may be continuously supplied to the load 30, thereby detecting the first current path P1 and the second. The voltage value of one of the current paths P2 can determine that the first switch 11 or the second switch 13 is abnormally turned on.

Moreover, since the electric power system of the electric vehicle is mostly connected to the vehicle body, it is a low voltage level of the electric power system. The insulation resistance between the power system and the vehicle body is usually used as the basis for the leakage protection of the power system, that is, the insulation resistance of the electric vehicle needs to be controlled above a limit value to ensure the protection effect of the electric vehicle power system. However, since the electric vehicle is in a running state, such as driving over a water raft, bumping or uneven road surface and rubbing to the vehicle body, etc., it is possible to cause a change in the insulation resistance of the electric vehicle. Therefore, in another embodiment, the battery is broken. In addition to detecting whether the first switch 11 or the second switch 13 is abnormally turned on, the battery breaker 10 can also be used to measure the magnitude of the insulation resistance.

Please refer to FIG. 2. FIG. 2 is a schematic circuit diagram of a battery breaker according to another embodiment of the present invention. As shown in FIG. 2, the battery breaker 40 is electrically connected between the power source 50 and the load 60. The battery breaker 40 has a first switch 41, a second switch 43, a third switch 47 and a fourth switch 49, and a processor 45. The power source 50 has a first end 51 and a second end 53, such as a positive terminal and a negative terminal. The load 60 is a power component inside the electric vehicle, such as a DC-DC converter, an electronic controller, a secondary module, a motor, a meter, a lamp, or other electrical components, which is not limited in this embodiment. The first end 51 and the second end 53 of the power source 50 are electrically coupled to a low voltage level, such as a vehicle body or other suitable location. The first end 51 of the power source 50 has a first insulation impedance Z3 between the low voltage level, and the second end 53 of the power source 50 has a second insulation resistance Z4 between the low voltage level. For convenience of description, the The low voltage level is displayed on the ground, but not limited to this.

The first switch 41 is disposed at a first current path P3 between the first end 51 of the power source 50 and the load 60. The second switch 43 is provided at a second current path P4 between the second end 53 of the power source 50 and the load 60. The third switch 47 has a first equivalent resistance value and is connected in parallel to the first insulation resistance Z3. The fourth switch 49 has a second equivalent resistance value and is connected in parallel to the second insulation resistance Z4. For convenience of explanation, the equivalent resistance of the third switch 47 is represented by a resistor Rc in FIG. 2, and the equivalent resistance of the fourth switch 49 is represented by a resistor Rd. In other embodiments, the battery breaker 40 can also have a first resistor and a second resistor. The first resistor is connected in series to the third switch 47, and the second resistor is connected in series to the fourth switch 49. In other words, the resistor Rc in FIG. 2 can also represent the first resistor, and the resistor Rd can also represent the second resistor, which is not limited in this embodiment.

The processor 45 is electrically connected to one of the first current path P3 and the second current path P4 for controlling the third switch 47 and the fourth switch 49, and when the third switch 47 and the fourth switch 49 are selectively turned on. The processor 45 determines the magnitudes of the first insulation impedance Z3 and the second insulation impedance Z4 according to the voltage value of one of the first current path P3 and the second current path P4. In FIG. 2, the processor 45 is electrically connected to the first current path P3 and the second current path P4. In an actual application, only the processor 45 can be electrically connected to the first current path P3 according to actual requirements. And one of the second current paths P4, which is not limited in this embodiment.

In FIG. 2, the battery breaker 40 further has a first internal impedance Re and a second internal impedance Rf. The first internal impedance Re is located between the first switch 41 and the load 60, and is electrically connected between the first current path P3 and the reference potential terminal. The second internal impedance Rf is located between the second switch 43 and the load 60, and is electrically connected between the second current path P4 and the reference potential terminal. That is, the first internal impedance Re is the equivalent impedance between the first current path P3 of the battery breaker 40 and the low voltage level, and the second internal impedance Rf is the second current path P4 of the battery breaker 40 and the low The equivalent impedance between voltage levels. The first internal impedance Re and the second internal impedance Rf are shown for convenience of description in the illustration of the present embodiment, and are not intended to limit the embodiment, that is, the first internal impedance Re and the other embodiments may be eliminated. The setting of the second internal impedance Rf. The first internal resistance Re and the second internal resistance Rf such as other stray resistances in the electric vehicle or other suitable resistance are not limited in this embodiment.

In the drawing of the embodiment, the first switch 41, the second switch 43, the third switch 47, and the fourth switch 49 are displayed by simple switch symbols, but in a practical example, the first switch 41, the second The switch 43, the third switch 47, and the fourth switch 49 may be transistors, relays, or other suitable switching circuits or components, which are not limited in this embodiment. In addition, the first switch 41 and the second switch 43 are selectively turned on by the enable signal, and the enable signal is, for example, an electric vehicle's key on and key off when the electric vehicle is started. Signal. When the first switch 41 and the second switch 43 are turned on, the power source 50 is supplied to the load 60 via the battery breaker 40.

When the battery breaker 40 is to measure the first insulation resistance Z3 and the second insulation resistance Z4, first, according to FIG. 2, when the first switch 41 and the second switch 43 are turned off, the processor 45 controls the third switch 47 and The fourth switch 49 is selectively turned on to measure the voltage value of the first current path P3 or the second current path P4. For example, when the first current path P3 is measured, when the third switch 47 is turned on and the fourth switch 49 is turned off, the processor 45 measures the first current path P3 to obtain the first detection of the first current path P3. Voltage value. When the third switch 47 is turned off and the fourth switch 49 is turned on, the processor 45 measures the second current path P4 to obtain the second detected voltage value of the second current path P4. Thereafter, the processor 45 determines the magnitudes of the first insulation resistance Z3 and the second insulation resistance Z4 based on the first detection voltage value, the second detection voltage value, the resistance Rc, and the resistance value of the resistor Rd.

That is, regardless of the resistance value of the resistor Rc being the equivalent impedance value of the third switch 47 or the resistance value of the first resistor, the resistance value of the resistor Rc may be previously obtained and stored in the processor 45, and the same resistance Rd The resistance value is also obtained in advance and stored in the processor 45. The processor 45 obtains the first detection voltage value and the second detection voltage value of the first current path P3, wherein the first detection voltage value is in a loop formed by the power source 50, the first insulation resistance Z3, the resistance Rc, and the second insulation resistance Z4. The first insulation resistance Z3 is a partial pressure of the parallel resistance Rc. The second detected voltage value is a partial pressure of the first insulating impedance Z3 in a loop formed by the power source 50, the first insulating impedance Z3, the resistor Rd, and the second insulating impedance Z4. The processor 45 can calculate the magnitudes of the first insulation impedance Z3 and the second insulation impedance Z4 by using the first detection voltage value, the second detection voltage value, and the resistance values of the known resistance Rc and the resistance Rd.

Similarly, when the first switch 41 and the second switch 43 are turned on, the processor 45 can also control the third switch 47 and the fourth switch 49 to be selectively turned on according to the first current path P3 or the second current path P4. The voltage value determines the magnitude of the first insulation resistance Z3 and the second insulation resistance Z4. When the first switch 41 and the second switch 43 are turned on, in the loop formed by the power source 50, the first insulating impedance Z3, the resistor Rc, the first internal impedance Re, the second insulating impedance Z4, and the second internal impedance Rf, the first The detected voltage value is a partial voltage of the first insulation resistance Z3 parallel resistance Rc in parallel with the first internal impedance Re. In a loop formed by the power source 50, the first insulation resistance Z3, the first internal impedance Re, the second insulation resistance Z4, the resistance Rd, and the second internal impedance Rf, the second detection voltage value is the first insulation resistance Z3 parallel to the first internal The partial pressure of the impedance Re.

The processor 45 calculates the first insulation resistance Z3 and the first resistance voltage value, the second detection voltage value, and the stored resistance Rc, the resistance Rd, the first internal impedance Re, and the second internal resistance Rf. The size of the two insulation impedance Z4. Accordingly, the electric vehicle can control the switching between the third switch and the fourth switch before or during the driving to determine the magnitude of the first insulation impedance Z3 and the second insulation impedance Z4 to ensure the electric vehicle power. The protective effect of the system.

In one embodiment, the processor 45 is electrically coupled to the alert. When the impedance values of the first insulating impedance Z3 and the second insulating impedance Z4 of the processor 45 are lower than a preset threshold, the alerter issues an impedance abnormality warning, for example, displayed on the dashboard of the electric vehicle. The preset threshold can be set according to the insulation resistance requirement of the electric vehicle, such as 200KΩ or other suitable impedance value.

Moreover, when the first switch 41 and the second switch 43 are controlled by the enable signal, when the switch is turned on to off, the processor 45 controls the third switch 47 and the fourth switch 49 to be turned off, and according to the first current path P3 and A voltage value of one of the second current paths P4 and a predetermined voltage value determine whether one of the first switch 41 and the second switch 43 is abnormally turned on. In more detail, when the first switch 41 and the second switch 43 are switched off, if the first switch 41 and the second switch 43 are normally turned off, the voltage value of the first current path P3 is the power source 50 and the first insulation impedance Z3. The partial pressure of the first insulation resistance Z3 in the loop formed by the second insulation resistance Z4. When one of the first switch 41 and the second switch 43 is not normally turned on, the voltage value of the first current path P3 may be different from the voltage value at the normal cutoff.

For example, when the first switch 41 is not normally turned on, in the loop formed by the power source 50, the first insulation impedance Z3, the first internal impedance Re, and the second insulation resistance Z4, the voltage value of the first current path P3 is An insulation resistance Z3 is connected in parallel with the partial pressure of the first internal impedance Re. When the second switch 43 is not normally turned on, the voltage value of the first current path P3 is a fraction of the first insulation impedance Z3 in the loop formed by the power source 50, the first insulation impedance Z3, the second insulation impedance Z4, and the second internal impedance Rf. Pressure.

In other words, when the first switch 41 is not normally turned on, the voltage value of the first current path P3 is smaller than the voltage value of the first current path P3 when it is normally turned off. When the second switch 43 is not normally turned on, the voltage value of the first current path P3 is greater than the voltage value of the first current path P3 when it is normally turned off. Therefore, the voltage value of the first current path P3 at the normal cutoff is used as a preset voltage value. When the processor 45 determines that one of the first switch 41 and the second switch 43 is abnormally turned on, the processor 45 compares the first current. The magnitude of the path P3 voltage value and the preset voltage value may be determined according to whether the first switch 41 is abnormally turned on or the second switch 43 is abnormally turned on.

In this embodiment, the abnormal conduction may be a failure, a fusion, or other condition of the first switch or the second switch. In addition, in this embodiment, the voltage value of the first current path P3 is compared with the preset voltage value. In other embodiments, the voltage value of the second current path P4 and another preset voltage value may be compared, or may be combined. The first current path P3 and the second current path P4 are compared to determine that the first switch 41 is abnormally turned on or the second switch 43 is abnormally turned on. This embodiment is not limited.

Referring to FIG. 3 together, FIG. 3 is a schematic diagram of a preset voltage waveform and an actual voltage waveform according to an embodiment of the invention. As shown in the figure, the preset voltage value in the foregoing embodiment may also be a preset voltage waveform as shown by a broken line in FIG. That is, when the first switch 41 and the second switch 43 are switched off, if the first switch 41 and the second switch 43 are normally turned off, the processor 45 controls the third switch 47 to be turned off, and when the fourth switch 49 is turned on, the first switch The voltage of a current path P3 will be as indicated by the dashed line in the first interval Int1. The processor 45 controls the third switch 47 to be turned off. When the fourth switch 49 is turned off, the voltage of the first current path P3 is as indicated by a broken line in the second interval Int2. The processor 45 controls the third switch 47 to be turned on, and when the fourth switch 49 is turned off, the voltage of the first current path P3 is as indicated by a broken line in the third interval Int3.

When the first switch 41 and the second switch 43 are not normally turned on, and the processor 45 controls the third switch 47 to be turned off, and the fourth switch 49 is turned on, the voltage of the first current path P3 is as solid as in the first interval Int1. Show. When the first switch 41 and the second switch 43 are not normally turned on, and the processor 45 controls the third switch 47 to be turned off, and the fourth switch 49 is turned off, the voltage of the first current path P3 is as the solid line in the second interval Int2 Show. When the first switch 41 and the second switch 43 are not normally turned on, and the processor 45 controls the third switch 47 to be turned on, and the fourth switch 49 is turned off, the voltage of the first current path P3 is as solid as in the third interval Int3. Show. Accordingly, the processor 45 can determine whether one of the first switch 41 and the second switch 43 is abnormally turned on according to the difference between the actual voltage waveform on the first current path P3 and the preset voltage waveform. Moreover, as described above, the processor 45 may also determine that the first switch 41 is abnormally turned on or the second switch 43 occurs according to the voltage level of the actual voltage waveform being higher or lower than the preset voltage waveform voltage level. Not working properly.

Therefore, in addition to the battery breaker 40, it can be judged whether the internal switch is abnormally turned on, and the battery breaker 40 can measure the insulation resistance immediately before, during, and after the electric vehicle travels.

For a more clear description of the method for detecting the abnormality of the battery breaker switch, please refer to FIG. 2 and FIG. 4 together. FIG. 4 is a flow chart of the method for measuring the insulation resistance according to an embodiment of the invention. . As shown in the figure, in step S701, the first switch 11 and the second switch 13 are selectively turned on according to the enable signal. In step S703, when the enable signal indicates that the first switch 11 and the second switch 13 are switched to be off, the voltage value according to one of the first current path P1 and the second current path P2 is determined according to a preset voltage value. Whether one of the switch 11 and the second switch 13 is not normally turned on. In step S705, when it is determined that one of the first switch 11 and the second switch 13 is abnormally turned on, comparing the voltage value of one of the first current path P1 and the second current path P2 with the magnitude of the preset voltage value, It is judged that the first switch 11 is not normally turned on or the second switch 13 is not normally turned on. The method for determining the present invention has been substantially disclosed in the above-described embodiments, and the description of the embodiments is not repeated herein.

In another embodiment, please refer to FIG. 2 and FIG. 5 together. FIG. 5 is a flow chart of steps of a method for measuring insulation resistance according to an embodiment of the invention. As shown in the figure, in step S801, the first switch 41 and the second switch 43 are selectively turned on according to the enable signal. In step S803, when the processor 45 controls the third switch 47 to be turned on and the fourth switch 49 is turned off, the first detected voltage value of one of the first current path P3 and the second current path P4 is obtained. In step S805, when the processor 45 controls the third switch 47 to be turned off and the fourth switch is turned on 17, the second detected voltage value of one of the first current path P3 and the second current path P4 is obtained. In step S807, the first insulation resistance Z3 and the first insulation resistance are determined according to the first detection voltage value, the second detection voltage value, the first equivalent resistance value of the third switch 47, and the second equivalent resistance value of the fourth switch 49. The size of the two insulation impedance Z4. In step S809, when the processor 45 controls the third switch 47 to be turned off, the fourth switch 49 is turned off, and the enable signal indicates that the first switch 41 and the second switch 43 are switched off, according to the first current path P3 and the second current. A voltage value of one of the paths P4 and a preset voltage value determine whether one of the first switch 41 and the second switch 43 is abnormally turned on. In step S811, when it is determined that one of the first switch 41 and the second switch 43 is abnormally turned on, comparing the voltage value of one of the first current path P3 and the second current path P4 with the magnitude of the preset voltage value, It is judged that the first switch 41 is not normally turned on or the second switch 43 is not normally turned on. The method for determining the present invention has been substantially disclosed in the above-described embodiments, and the description of the embodiments is not repeated herein.

In summary, the embodiments of the present invention provide a battery breaker that can detect that a switch is not normally turned on and a detection method thereof. When the first switch and the second switch are switched from on to off, the processor detects the first The magnitude of the voltage on the current path and the second current path determines whether one of the first switch or the second switch is abnormally turned on, so that the battery breaker can detect whether the internal switch is abnormally turned on, and then issue an alert notification The switch is not normally turned on. In another embodiment, the battery breaker connects the fourth switch to the second insulation impedance by paralleling the third switch to the first insulation impedance, and the processor controls the switching of the third switch and the fourth switch. And determining the magnitudes of the first insulation impedance and the second insulation impedance according to the voltage value of one of the first current path and the second current path to ensure the protection effect of the electric vehicle power system.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

10, 40‧‧‧ battery circuit breaker
11, 41‧‧‧ first switch
13, 43‧‧‧ second switch
15, 45‧‧‧ processor
17‧‧‧ Third switch
19‧‧‧fourth switch
20, 50‧‧‧ power supply
21, 51‧‧‧ first end
23, 53‧‧‧ second end
30, 60‧‧‧ load
Z1, Z3‧‧‧ first insulation resistance
Z2, Z4‧‧‧second insulation resistance
Ra, Re‧‧‧ first internal impedance
Rb, Rf‧‧‧ second internal impedance
Rc, Rd‧‧‧ resistance
P1, P3‧‧‧ first current path
P2, P4‧‧‧ second current path

1 is a circuit diagram of a battery breaker according to an embodiment of the invention. 2 is a circuit diagram of a battery breaker according to another embodiment of the present invention. FIG. 3 is a schematic diagram of a preset voltage waveform and an actual voltage waveform according to still another embodiment of the present invention. 4 is a flow chart showing the steps of a method for measuring insulation resistance according to an embodiment of the invention. FIG. 5 is a flow chart showing the steps of a method for measuring insulation resistance according to another embodiment of the invention.

10‧‧‧Battery Breaker

11‧‧‧First switch

13‧‧‧Second switch

15‧‧‧ processor

20‧‧‧Power supply

21‧‧‧ first end

23‧‧‧ second end

30‧‧‧load

Z1‧‧‧first insulation resistance

Z2‧‧‧second insulation resistance

Ra, Rb‧‧‧ resistance

P1‧‧‧First current path

P2‧‧‧second current path

Claims (10)

A battery breaker capable of detecting that a switch is not normally turned on includes: a first switch disposed at a first current path between a first end of a power source and a load, the first switch being selectively signal dependent a second switch is disposed at a second current path between the second end of the power source and the load, the second switch is selectively turned on according to the enable signal; and a processor is electrically connected One of the first current path and the second current path, when the enable signal indicates that the first switch and the second switch are switched to be off, the processor is configured according to the first current path and the second current path a voltage value and a preset voltage value, determining whether one of the first switch and the second switch is abnormally turned on, and determining that one of the first switch and the second switch is abnormally turned on The processor compares the voltage value of one of the first current path and the second current path with the magnitude of the preset voltage value, and determines that the first switch is not normally turned on or the second switch is not normally turned on. The battery breaker according to claim 1 is characterized in that: the third switch has a first equivalent resistance value, and is connected in parallel with a first insulation resistance, the first insulation resistance Connected between the first end of the power source and a reference potential end; and a fourth switch having a second equivalent resistance value connected in parallel to a second insulation resistance, the second insulation resistance being electrically connected to the Between the second end of the power supply and the reference potential terminal. The battery breaker according to claim 2, wherein the processor is further configured to control the third switch and the fourth switch, and the third switch and the fourth switch are selectively When conducting, the processor determines the magnitude of the first insulation resistance and the second insulation resistance according to a voltage value of one of the first current path and the second current path. The battery breaker of claim 3, wherein the third switch is turned on, and the fourth switch is turned off, the processor measures the first current path and the second current path. a first detection voltage value of one of the first detection voltages, when the fourth switch is turned off, the fourth switch is turned on, the processor measures a second detection voltage of one of the first current path and the second current path And determining, by the processor, the first insulation resistance and the second insulation resistance according to the first detection voltage value, the second detection voltage value, the first equivalent resistance value, and the second equivalent resistance value . The battery breaker of claim 2, wherein the detectable switch is not normally turned on, further includes a first resistor and a second resistor, wherein the first resistor is connected in series to the third switch, and the second resistor is connected in series Four switches. The battery breaker according to claim 1, wherein the battery breaker is abnormally turned on, further comprising a first internal impedance and a second internal impedance, the first internal impedance being located between the first switch and the load, and The second internal impedance is located between the second current switch and the load, and is electrically connected between the second current path and the reference potential terminal. A method for detecting that a switch of a battery breaker is abnormally turned on is applicable to a battery breaker, the battery breaker includes a first switch and a second switch, and the first switch is disposed at a first end of a power supply and a a first current path between the load, the second switch is disposed on a second current path between the second end of the power source and the load, and the detecting method includes: selectively turning on the first signal according to the consistent energy signal a switch and the second switch; when the enable signal indicates that the first switch and the second switch are switched to be off, according to a voltage value of one of the first current path and the second current path and a preset a voltage value, determining whether one of the first switch and the second switch is abnormally turned on; and comparing the first current path and the first when it is determined that one of the first switch and the second switch is abnormally turned on The voltage value of one of the two current paths and the magnitude of the preset voltage value determine that the first switch is not normally turned on or the second switch is not normally turned on. The method for detecting that the switch of the battery breaker is abnormally turned on, wherein the battery breaker further includes a third switch and a fourth switch, the third switch having a first equivalent resistance value, And parallel to a first insulation resistance, the fourth switch has a second equivalent resistance value, and is connected in parallel to a second insulation impedance, the first insulation resistance is electrically connected to the first end of the power source and a reference potential The second insulation resistance is electrically connected between the second end of the power source and the reference potential end, and the detecting method includes: selectively turning on the third switch and the fourth switch; A voltage value of one of the first current path and the second current path determines a magnitude of the first insulation resistance and the second insulation resistance. The method for detecting that the switch of the battery breaker is abnormally turned on according to claim 8, wherein the step of determining the magnitude of the first insulation resistance and the second insulation resistance comprises: when the third switch is turned on, the fourth When the switch is turned off, obtaining a first detection voltage value of one of the first current path and the second current path; when the third switch is turned off, the fourth switch is turned on, obtaining the first current path and the first a second detection voltage value of one of the two current paths; and determining the first according to the first detection voltage value, the second detection voltage value, the first equivalent resistance value, and the second equivalent resistance value The insulation resistance and the magnitude of the second insulation resistance. The method for detecting that the switch of the battery breaker is abnormally turned on, wherein the battery breaker further includes a first resistor and a second resistor, the first resistor being connected in series to the third switch, the first The second resistor is connected in series to the fourth switch, and the step of determining the magnitude of the first insulation resistance and the second insulation impedance according to the first detection voltage value and the second detection voltage value is further based on the first resistance and The resistance value of the second resistor determines the magnitude of the first insulation resistance and the second insulation resistance.