CN106814311B - Battery circuit breaker capable of detecting abnormal conduction of switch and detection method thereof - Google Patents
Battery circuit breaker capable of detecting abnormal conduction of switch and detection method thereof Download PDFInfo
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- CN106814311B CN106814311B CN201610644925.9A CN201610644925A CN106814311B CN 106814311 B CN106814311 B CN 106814311B CN 201610644925 A CN201610644925 A CN 201610644925A CN 106814311 B CN106814311 B CN 106814311B
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- 230000002159 abnormal effect Effects 0.000 title claims abstract description 79
- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 238000009413 insulation Methods 0.000 claims description 77
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- 230000005611 electricity Effects 0.000 claims description 11
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- 238000003466 welding Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
一种可检测开关不正常导通的电池断路器及其检测方法，电池断路器具有第一开关、第二开关及处理器，第一开关和第二开关设置于电源与负载之间的第一电流路径和第二电流路径。第一开关及第二开关依据致能信号选择性地导通。处理器电性连接第一和第二电流路径其中之一。当致能信号指示第一及第二开关切换至截止时，处理器依据第一或第二电流路径的电压值与预设电压值，判断第一或第二开关是否不正常导通。当判断第一或第二开关不正常导通时，处理器比较第一或第二电流路径的电压值与预设电压值的大小，判断第一或第二开关不正常导通。
A battery circuit breaker that can detect abnormal conduction of a switch and a detection method thereof. The battery circuit breaker has a first switch, a second switch and a processor. The first switch and the second switch are arranged between the power supply and the load. current path and a second current path. The first switch and the second switch are selectively turned on according to the enable signal. The processor is electrically connected to one of the first and second current paths. When the enable signal indicates that the first and second switches are turned off, the processor determines whether the first or second switch is abnormally conductive based on the voltage value of the first or second current path and the preset voltage value. When it is determined that the first or second switch is not conducting normally, the processor compares the voltage value of the first or second current path with the preset voltage value and determines that the first or second switch is not conducting normally.
Description
Technical field
The present invention is especially a kind of about a kind of detectable battery circuit breaker and its detection method for switching abnormal conducting
Suitable for electric vehicle, with judge electric vehicle battery circuit breaker switch whether welding without normally battery circuit breaker and its
Detection method.
Background technique
The existing vehicles usually by burns gasoline as a source of power, with the promotion of environmental protection ideas, in order to drop
Low burns gasoline and acquisition petroleum injured caused by environment, at present there are many research and resource input in develop electric vehicle.
Although electric vehicle can reduce the injury to environment, the battery capacity of its electric system, charge and discharge with electric power as a source of power
The stability of efficiency and system is all associated with the quality of electric vehicle quality.
In electric vehicle power supply system, battery open circuit is set usually on the current path of power supply to electric vehicle electric power
Device opens (key on) by the electric switch for determining electric vehicle whether conducting of battery circuit breaker or electric switch closes (key off).So
And when user has controlled battery circuit breaker cut-off, but battery circuit breaker is because of switch welding or other reasons, without just
Often when conducting, power supply can constantly supply electricity to electric vehicle, in turn result in the consumption of power supply.Existing battery circuit breaker does not have
The mechanism of the whether abnormal conducting of detection switch, and the method whether detection switch is connected is usually that electricity is arranged at the both ends of switch
Pressure meter judges whether switch is connected by the voltage of measurement switch ends.However, if battery circuit breaker adopts this method not
Only increase the number of detection, and needs to add potentiometer at the both ends of each switch, and then increase testing cost.
Summary of the invention
The invention reside in a kind of detectable battery circuit breaker and its detection method for switching abnormal conducting is provided, solution is used
Certainly existing battery circuit breaker can not detect battery circuit breaker switch whether abnormal conducting the problem of, and then reduce electric vehicle
The situation of the abnormal consumption of power supply.
The detectable battery circuit breaker for switching abnormal conducting disclosed in this invention, has first switch, second switch
And processor.First switch is set to the first current path between the first end and load of power supply, and selects according to enable signal
Be connected to selecting property.Second switch is set to the second current path between the second end and load of power supply, and according to enable signal
It selectively turns on.Processor is electrically connected one of the first current path and the second current path, when enable signal designation
When first switch and second switch switch to cut-off, processor is according to one of the first current path and the second current path
Voltage value and preset voltage value judge the whether abnormal conducting of one of first switch and the second switch, and work as and judge first
When switch and the abnormal conducting of one of second switch, processor compare the first current path and the second current path wherein it
One voltage value and the size of preset voltage value judge the abnormal conducting of first switch or the abnormal conducting of second switch.
The method of the abnormal conducting of switch of detection battery circuit breaker disclosed in this invention, is suitable for battery circuit breaker.
Battery circuit breaker has first switch and second switch, and first switch is set to the first electricity between the first end of power supply and load
Flow path.Second switch is set to the second current path between the second end of power supply and load.Battery circuit breaker detection switch
The method of abnormal conducting, which has, is connected first switch and second switch according to enable signal-selectivity.When enable signal designation
Voltage value when first switch and second switch switch to cut-off, according to one of the first current path and the second current path
With preset voltage value, the whether abnormal conducting of one of first switch and the second switch is judged.When judging first switch and
When two one of them abnormal conductings of switch, compare the voltage value of one of the first current path and the second current path and pre-
If the size of voltage value, the abnormal conducting of first switch or the abnormal conducting of second switch are judged.
The battery circuit breaker and its detection method of the abnormal conducting of the detectable switch according to aforementioned present invention, by
Voltage swing on first current path and the second current path is detected by processor, can judge first switch accordingly or second is opened
Close one of them whether abnormal conducting, also can determine whether out be first switch it is abnormal conducting or the abnormal conducting of second switch,
The whether abnormal conducting of the switch for making battery circuit breaker can detecte battery circuit breaker is used, and then reduces the power supply of electric vehicle not
The situation of normal consumption.
The explanation of explanation and the following embodiments and the accompanying drawings above with respect to present disclosure is of the invention with explanation to demonstrate
Spirit and principle, and patent claim of the invention is provided and is further explained.
Detailed description of the invention
Fig. 1 is the circuit diagram of the battery circuit breaker according to depicted in one embodiment of the invention.
Fig. 2 is the circuit diagram of the battery circuit breaker according to depicted in another embodiment of the present invention.
Fig. 3 is the schematic diagram of the predetermined voltage waveform according to depicted in yet another embodiment of the invention and virtual voltage waveform.
Fig. 4 is the step flow chart that the method for insulation impedance is measured according to depicted in one embodiment of the invention.
Fig. 5 is the step flow chart that the method for insulation impedance is measured according to depicted in another embodiment of the present invention.
Wherein appended drawing reference are as follows:
10,40 battery circuit breaker
11,41 first switch
13,43 second switch
15,45 processor
47 thirds switch
49 the 4th switches
20,50 power supply
21,51 first end
23,53 second end
30,60 load
The first insulation impedance of Z1, Z3
The second insulation impedance of Z2, Z4
The first internal driving of Ra, Re
The second internal driving of Rb, Rf
Rc, Rd resistance
The first current path of P1, P3
The second current path of P2, P4
Specific embodiment
Describe detailed features and advantage of the invention in detail in embodiments below, content is enough to make any to be familiar with
Relevant art understands technology contents of the invention and implements accordingly, and according to content disclosed in this specification, apply for a patent
Range and schema, it is any to be familiar with relevant art and be readily understood upon the relevant purpose of the present invention and advantage.Embodiment below
For the viewpoint that present invention be described in more detail, but it is non-anyways to limit scope of the invention.
Fig. 1 is please referred to, Fig. 1 is the circuit diagram of the battery circuit breaker according to depicted in one embodiment of the invention.Such as Fig. 1
Shown, battery circuit breaker 10 has first switch 11, second switch 13 and processor 15.First switch 11 is set to power supply 20
The first current path P1 between first end 21 and load 30, and be connected according to enable signal-selectivity.Second switch 13 is set
The second current path P2 being placed between the second end 23 and load 30 of power supply 20, and be connected according to enable signal-selectivity.
Processor 15 is electrically connected one of the first current path P1 and the second current path P2, when enable signal designation first switch
11 and second switch 13 when switching to cut-off, processor 15 is according to one of the first current path P1 and the second current path P2
Voltage value and preset voltage value, judge first switch 11 and second switch 13 one of them whether abnormal conducting, and when sentencing
When disconnected first switch 11 and one of them the abnormal conducting of second switch 13, processor 15 compares the first current path P1 and second
The voltage value of one of current path P2 and the size of preset voltage value judge the abnormal conducting of first switch 11 or second open
Close 13 abnormal conductings.
The first end 21 and second end 23 of power supply 20 are, for example, the positive terminal and negative pole end of battery.First switch 11 is to lead
The positive terminal in energization source 20 to the current path between load 30, second switch 13 is extremely loaded to the negative pole end of turn-on power 20
Current path between 30.When first switch 11 and second switch 13 are heated or other factors and when welding, electricity may be directed at
20 positive terminal of source or negative pole end constantly supply power to load 30, therefore, by the first current path P1 of detection and the second electric current road
The voltage value of one of diameter P2, it can be determined that the situation of abnormal conducting occurs for first switch 11 or second switch 13.
Furthermore since the electric system of current electric vehicle is to be overlapped in car body mostly, the low-voltage as electric system is quasi-
Position.And the insulation impedance between electric system and car body, it is commonly used as the foundation of electric system leakage protection, that is, electronic
The insulation impedance of vehicle needs to be controlled in limits value or more, to ensure the protection effect of electric vehicle electric system.However, by
In the process of moving in electric vehicle, such as the puddles of water, collision or Uneven road is run over and is rubbed to situations such as car bodies, be likely to
It will cause the change of electric vehicle insulation impedance, therefore, in another embodiment, battery circuit breaker 10 is in addition to can detecte first
Outside switch 11 or the whether abnormal conducting of second switch 13, battery circuit breaker 10 can also be to measure the size of insulation impedance.
Referring to figure 2., Fig. 2 is the circuit diagram of the battery circuit breaker according to depicted in another embodiment of the present invention.Such as
Shown in Fig. 2, battery circuit breaker 40 is electrically connected between power supply 50 and load 60.Battery circuit breaker 40 have first switch 41,
Second switch 43, third switch 47 and the 4th switch 49 and processor 45.Power supply 50 has first end 51 and second end 53, such as
Positive terminal and negative pole end.Load 60 is the electrical component of using inside electric vehicle, for example, DC-DC converter, electronic controller,
Secondary side module, motor, instrument, car light or other use electrical component, the present embodiment not limit.The first end 51 of power supply 50 and
Two ends 53 are electrically connected to a low voltage level, such as car body or other suitable places.The first end 51 of power supply 50 with it is low
There is the first insulation impedance Z3 between voltage quasi position, there is the second insulation resistance between the second end 53 and low voltage level of power supply 50
Anti- Z4, for convenience of explanation, the low voltage level in Fig. 2 are shown with ground terminal, but are not limited thereto.
First switch 41 is set to the first current path P3 between the first end 51 and load 60 of power supply 50.Second switch
43 are set to the second current path P4 between the second end 53 of power supply 50 and load 60.Third switch 47 has the first equivalent resistance
Value, and it is parallel to the first insulation impedance Z3.4th switch 49 has the second equivalent resistance, and is parallel to the second insulation impedance
Z4.For convenience of explanation, the equivalent resistance of third switch 47 is indicated in Fig. 2 with resistance Rc, the 4th switch 49 is indicated with resistance Rd
Equivalent resistance.In other embodiments, battery circuit breaker 40 can also have first resistor and second resistance, first resistor string
It is coupled to third switch 47, second resistance is series at the 4th switch 49.In other words, the resistance Rc in Fig. 2 can also indicate first
Resistance, resistance Rd can also indicate second resistance, and the present embodiment not limits.
Processor 45 is electrically connected one of the first current path P3 and the second current path P4, opens to control third
Pass 47 and the 4th switch 49, and when third switch 47 and the 4th switch 49 selectively turn on, processor 45 is according to the first electricity
The voltage value of one of flow path P3 and the second current path P4 judges the first insulation impedance Z3's and the second insulation impedance Z4
Size.In Fig. 2, processor 45 is electrically connected to the first current path P3 and the second current path P4, in actual application,
Processor 45 only can be electrically connected one of the first current path P3 and the second current path P4 according to actual demand,
The present embodiment not limits.
In Fig. 2, battery circuit breaker 40 has more the first internal driving Re and the second internal driving Rf.First internal driving
Re is located between first switch 41 and load 60, and is electrically connected between the first current path P3 and reference potential end.Second
Internal driving Rf is located between second switch 43 and load 60, and be electrically connected the second current path P4 and reference potential end it
Between.That is, the first internal driving Re be battery circuit breaker 40 the first current path P3 and low voltage level between etc.
Imitate impedance, the equivalent impedance between the second current path P4 and low voltage level of the second internal driving Rf battery circuit breaker 40.
Show that the first internal driving Re and the second internal driving Rf are used for convenience of description in the icon of the present embodiment, not to limit
The present embodiment processed, that is, the setting of the first internal driving Re and the second internal driving Rf can be cancelled in other embodiments.The
One internal driving Re and other stray resistances or other suitable resistance in the second internal driving Rf such as electric vehicle, this implementation
Example not limits.
In the schema of the present embodiment, first switch 41, second switch 43, third switch 47 and the 4th switch 49 are with simple
Switch symbols show, however in actual example, first switch 41, second switch 43, third switch 47 and the 4th switch
49 can be transistor, relay or other suitable switching circuits or component, and the present embodiment not limits.In addition, first opens
Pass 41 and second switch 43 are controlled by enable signal and selectively turn on, electronic when enable signal is, for example, electric vehicle starting
The electric switch of vehicle opens (key on) and electric switch closes the signal of (key off).When first switch 41 and second switch 43 are connected,
Power supply 50 supplies electricity to load 60 through galvanic battery breaker 40.
When battery circuit breaker 40 will measure the first insulation impedance Z3 and the second insulation impedance Z4, first according to Fig.2,
When first switch 41 and second switch 43 are ended, processor 45 controls third switch 47 and the 4th switch 49 is selectively led
It is logical, to measure the voltage value of the first current path P3 or the second current path P4.Hereby come for measuring the first current path P3
It says, when third switch 47 is connected, and the 4th switch 49 ends, processor 45 measures the first current path P3, to obtain the first electricity
The first detection voltage value of flow path P3.When third switch 47 ends, and the 4th switch 49 is connected, second electricity of the measurement of processor 45
Flow path P4, to obtain the second detection voltage value of the second current path P4.Later, processor 45 is according to the first detection voltage
The resistance value of value, the second detection voltage value, resistance Rc and resistance Rd, judges the first insulation impedance Z3's and the second insulation impedance Z4
Size.
That is, no matter the resistance value of resistance Rc is the equivalent impedance of third switch 47 or the resistance of first resistor
Value, the resistance value of resistance Rc can be obtained in advance and be stored in processor 45, and similarly the resistance value of ground resistance Rd is also pre-
It first obtains and is stored in processor 45.Processor 45 obtains the first detection voltage value and the second detection of the first current path P3
In voltage value, the first detection voltage value is time that power supply 50, the first insulation impedance Z3, resistance Rc and the second insulation impedance Z4 are formed
Lu Zhong, the partial pressure of the first insulation impedance Z3 parallel resistance Rc.Second detection voltage value is power supply 50, the first insulation impedance Z3, electricity
It hinders in the circuit that Rd and the second insulation impedance Z4 is formed, the partial pressure of the first insulation impedance Z3.Processor 45 can be by the first inspection
Survey voltage value, second detection voltage value and known resistance Rc and resistance Rd resistance value, calculate the first insulation impedance Z3 and
The size of second insulation impedance Z4.
Similarly, when first switch 41 and second switch 43 are connected, processor 45 can also control third switch 47 and
4th switch 49 selectively turns on, and with the voltage value according to the first current path P3 or the second current path P4, judges first
The size of insulation impedance Z3 and the second insulation impedance Z4.When first switch 41 and second switch 43 are connected, in power supply 50, first
In the circuit that insulation impedance Z3, resistance Rc, the first internal driving Re, the second insulation impedance Z4 and the second internal driving Rf are formed,
First detection voltage value is the partial pressure of first the first internal driving Re of insulation impedance Z3 parallel resistance Rc parallel connection.In power supply 50,
The circuit that one insulation impedance Z3, the first internal driving Re, the second insulation impedance Z4, resistance Rd and the second internal driving Rf are formed
In, the second detection voltage value is the partial pressure of first the first internal driving Re of insulation impedance Z3 parallel connection.
Processor 45 is by the first detection voltage value, the second detection voltage value and resistance Rc, the resistance Rd, first stored
The resistance value of internal driving Re and the second internal driving Rf calculate the big of the first insulation impedance Z3 and the second insulation impedance Z4
It is small.Accordingly, electric vehicle all can handle the switched conductive that device 45 controls third switch and the 4th switch before traveling or in traveling,
Judge the size of the first insulation impedance Z3 and the second insulation impedance Z4, ensures the protection effect of electric vehicle electric system accordingly.
In one embodiment, processor 45 is electrically connected to attention device.As 45 first insulation impedance Z3 of processor and
When the impedance value of two insulation impedance Z4 is lower than a preset threshold, attention device issues impedance and warns extremely, such as is shown in electronic
On the instrument board of vehicle.Preset threshold can be set according to the insulation impedance demand of electric vehicle, such as 200K Ω or other suitable resistances
Anti- value.
Furthermore when first switch 41 and second switch 43 are controlled by enable signal, when switching to cut-off by conducting, processor
45 control third switches 47 and the cut-off of the 4th switch 49, and according to one of the first current path P3 and the second current path P4
Voltage value and a preset voltage value, judge first switch 41 and second switch 43 one of them whether abnormal conducting.More
Specifically, when first switch 41 and second switch 43 switch to cut-off, if first switch 41 and second switch 43 are normally cut
Only, the voltage value of the first current path P3 is in the circuit of power supply 50, the first insulation impedance Z3 and the second insulation impedance Z4 formation
The partial pressure of first insulation impedance Z3.When first switch 41 and one of them the abnormal conducting of second switch 43, the first electric current road
The voltage value of diameter P3 can be different from voltage value when normal cut-off.
For example, when 41 abnormal conducting of first switch, in power supply 50, the first insulation impedance Z3, the first inside resistance
In the circuit that anti-Re and the second insulation impedance Z4 are formed, the voltage value of the first current path P3 is the first insulation impedance Z3 parallel connection the
The partial pressure of one internal driving Re.When 43 abnormal conducting of second switch, the voltage value of the first current path P3 is power supply 50, the
The partial pressure of first insulation impedance Z3 in the circuit that one insulation impedance Z3, the second insulation impedance Z4 and the second internal driving Rf are formed.
In other words, when 41 abnormal conducting of first switch, when the voltage value of the first current path P3 is less than normal cut-off
The voltage value of first current path P3.When 43 abnormal conducting of second switch, the voltage value of the first current path P3 is greater than just
The voltage value of first current path P3 when often ending.Therefore the voltage value of the first current path P3 is as one when normally ending
Preset voltage value, when processor 45 judges first switch 41 and one of them the abnormal conducting of second switch 43, processor 45
Compare the size of the first current path P3 voltage value and preset voltage value, it is abnormal can to judge that first switch 41 occurs accordingly
Abnormal conducting occurs for conducting or second switch 43.
In this present embodiment, the situation of abnormal conducting can be first switch or second switch break down, welding or
Other situations.In addition, comparing the first current path P3 voltage value and preset voltage value in the present embodiment, in other embodiments
In, the voltage value and other preset voltage value of the second current path P4 can also be compared, or be to compare the first electricity together
Flow path P3 and the second current path P4 judges that abnormal conducting is occurring for first switch 41 or second switch 43 occurs not just
Often conducting, the present embodiment not limit.
It is the predetermined voltage waveform according to depicted in one embodiment of the invention and virtual voltage wave please with reference to Fig. 3, Fig. 3
The schematic diagram of shape.As shown, the preset voltage value in previous embodiment can also be predeterminated voltage as shown in phantom in Figure 3
Waveform.That is, when first switch 41 and second switch 43 switch to cut-off, if first switch 41 and second switch 43 are just
Often cut-off, processor 45, which controls third switch 47, to be ended, when the 4th switch 49 is connected, the voltage meeting such as the of the first current path P3
Shown in dotted line in one section Int1.Processor 45, which controls third switch 47, to be ended, when the 4th switch 49 ends, the first electric current road
The voltage of diameter P3 can be as shown in the dotted line in second interval Int2.Processor 45 controls third switch 47 and is connected, the 4th switch 49
When cut-off, the voltage of the first current path P3 can be as shown in the dotted line in 3rd interval Int3.
When first switch 41 and the abnormal conducting of second switch 43, and processor 45 controls third switch 47 and ends, and the 4th
It is shown in solid in the voltage meeting such as first interval Int1 of the first current path P3 when switch 49 is connected.When 41 He of first switch
The abnormal conducting of second switch 43, and processor 45 controls third switch 47 and ends, when the 4th switch 49 ends, the first electric current road
It is shown in solid in the voltage meeting such as second interval Int2 of diameter P3.When first switch 41 and the abnormal conducting of second switch 43, and
Processor 45 controls third switch 47 and is connected, and when the 4th switch 49 ends, the voltage of the first current path P3 can be such as 3rd interval
It is shown in solid in Int3.Accordingly, processor 45 can be according to virtual voltage waveform and predeterminated voltage on the first current path P3
The difference of waveform, judge first switch 41 and second switch 43 one of them whether abnormal conducting.Also, as above-mentioned,
Processor 45 can also be higher or lower than predetermined voltage waveform voltage level according to the voltage level of virtual voltage waveform, sentence accordingly
Disconnected is that abnormal conducting occurs for first switch 41 or abnormal conducting occurs for second switch 43.
Therefore battery circuit breaker 40 is other than it may determine that the internal whether abnormal conducting of switch, battery circuit breaker
40 can also electric vehicle traveling before, in driving process and traveling after insulation resistance can be measured in real time.
In order to illustrate more clearly of the method that detection battery circuit breaker switchs abnormal conducting, please with reference to Fig. 2 and figure
4, Fig. 4 be the step flow chart that the method for insulation impedance is measured according to depicted in one embodiment of the invention.As shown, in step
In rapid S701, first switch 11 and second switch 13 is connected according to enable signal-selectivity.In step S703, when enable is believed
Number instruction first switch 11 and second switch 13 be when switching to cut-off, according to the first current path P1 and the second current path P2 its
One of voltage value and preset voltage value, judge first switch 11 and second switch 13 one of them whether abnormal conducting.
In step S705, when judging first switch 11 and one of them the abnormal conducting of second switch 13, compare the first electric current road
The voltage value of one of diameter P1 and the second current path P2 and the size of preset voltage value, judge that first switch 11 is abnormal and lead
The logical or abnormal conducting of second switch 13.Judgment method of the present invention actually has been proposed in the implementation of foregoing description
In example, the present embodiment not repeated explanation herein.
It is the survey according to depicted in one embodiment of the invention please with reference to Fig. 2 and Fig. 5, Fig. 5 in another embodiment
Measure the step flow chart of the method for insulation impedance.As shown, in step S801, the is connected according to enable signal-selectivity
One switch 41 and second switch 43.In step S803, be connected when processor 45 controls third switch 47, the cut-off of the 4th switch 49
When, obtain the first detection voltage value of one of first current path P3 and the second current path P4.In step S805, when
Processor 45, which controls third switch 47, to be ended, when four switch conductions 49, the first current path P3 of acquirement and the second current path
The second detection voltage value of one of P4.In step S807, voltage value, the second detection voltage value, the are detected according to first
First equivalent resistance of three switches 47 and the second equivalent resistance of the 4th switch 49, judge the first insulation impedance Z3 and second
The size of insulation impedance Z4.In step S809, when processor 45 controls the cut-off of third switch 47, the cut-off of the 4th switch 49 and causes
When energy signal designation first switch 41 and second switch 43 switch to cut-off, according to the first current path P3 and the second current path
The voltage value and preset voltage value of one of P4 judges whether one of first switch 41 and second switch 43 are abnormal and leads
It is logical.In step S811, when judging first switch 41 and one of them the abnormal conducting of second switch 43, compare the first electric current
The voltage value of one of path P 3 and the second current path P4 and the size of preset voltage value, judge that first switch 41 is abnormal
Conducting or the abnormal conducting of second switch 43.Judgment method of the present invention actually has been proposed in the reality of foregoing description
It applies in example, the present embodiment not repeated explanation herein.
In summary, the embodiment of the present invention provide a kind of abnormal conducting of detectable switch battery circuit breaker and its
Detection method, when first switch and second switch switch to cut-off by being connected, by processor detect the first current path and
Voltage swing on second current path is used to judge the whether abnormal conducting of one of first switch or second switch
It allows battery circuit breaker to can detecte the internal whether abnormal conducting of switch, and then issues the abnormal conducting of warning telling switch
Situation.In another embodiment, battery circuit breaker, in the first insulation impedance, the 4th is switched simultaneously by by third switch in parallel
It is coupled to the second insulation impedance, and controls the switched conductive of third switch and the 4th switch by processor, according to the first electric current
The voltage value of one of path and the second current path, judges the size of the first insulation impedance and the second insulation impedance, accordingly
Ensure the protection effect of electric vehicle electric system.
Claims (10)
1. a kind of detectable battery circuit breaker for switching abnormal conducting characterized by comprising
One first switch, be set to a power supply first end and one load between one first current path, the first switch according to
It is connected according to an enable signal-selectivity；
One second switch, one second current path being set between the second end and the load of the power supply, the second switch according to
It is connected according to the enable signal-selectivity；And
One processor is electrically connected one of first current path and second current path, when the enable signal designation
When the first switch and the second switch switch to cut-off, the processor is according to first current path and second current path
The voltage value and a preset voltage value of one of them, judge whether one of the first switch and the second switch are abnormal and lead
It is logical, and when judging the abnormal conducting of one of the first switch and the second switch, which compares first electric current
The voltage value of one of path and second current path and the size of the preset voltage value, judge that the first switch is abnormal
Conducting or the abnormal conducting of the second switch.
2. the detectable battery circuit breaker for switching abnormal conducting as described in claim 1, which is characterized in that further include:
One third switch, has one first equivalent resistance, is parallel to one first insulation impedance, which electrically connects
It is connected between the first end and a reference potential end of the power supply；And
One the 4th switch, has one second equivalent resistance, is parallel to one second insulation impedance, which electrically connects
It is connected between the second end and the reference potential end of the power supply.
3. the detectable battery circuit breaker for switching abnormal conducting as claimed in claim 2, which is characterized in that the processor is more
To control third switch and the 4th switch, when the third switchs and the 4th switch selectively turns on, the processing
Voltage value of the device according to one of first current path and second current path, judge first insulation impedance and this
The size of two insulation impedances.
4. the detectable battery circuit breaker for switching abnormal conducting as claimed in claim 3, which is characterized in that when the third is opened
Conducting is closed, when the 4th switch ends, which measures one of first current path and second current path
One first detection voltage value, when third switch cut-off, four switch conductions, which measures first current path
And the one second detection voltage value of one of second current path, the processor according to the first detection voltage value, this
Two detection voltage values, first equivalent resistance and second equivalent resistance, judge first insulation impedance and this second absolutely
The size of edge impedance.
5. the battery circuit breaker of the abnormal conducting of as claimed in claim 2 detectable switch, which is characterized in that further include one the
One resistance and a second resistance, the first resistor are series at third switch, which is series at the 4th switch.
6. the battery circuit breaker of the abnormal conducting of as claimed in claim 2 detectable switch, which is characterized in that further include one the
One internal driving and one second internal driving, first internal driving are located between the first switch and the load, and electrically connect
Be connected between first current path and the reference potential end, second internal driving be located at the second switch and the load it
Between, and be electrically connected between second current path and the reference potential end.
7. a kind of method of the abnormal conducting of switch of detection battery circuit breaker, is suitable for a battery circuit breaker, battery open circuit
Device includes a first switch and a second switch, which is set to one the between the first end of a power supply and a load
One current path, the second switch are set to one second current path between the second end of the power supply and the load, feature
It is, which includes:
The first switch and the second switch is connected according to an enable signal-selectivity；
When the enable signal designation first switch and the second switch switch to cut-off, according to first current path and it is somebody's turn to do
The voltage value of one of second current path and a preset voltage value, judge one of the first switch and the second switch
Whether abnormal conducting；And
When judging the abnormal conducting of one of the first switch and the second switch, compare first current path and this
The size of the voltage values of one of two current paths and the preset voltage value, judge the abnormal conducting of the first switch or this
The abnormal conducting of two switches.
8. the method for the abnormal conducting of switch of detection battery circuit breaker as claimed in claim 7, which is characterized in that the battery
Breaker further includes third switch and one the 4th switch, and third switch has one first equivalent resistance, and is parallel to one
First insulation impedance, the 4th switch has one second equivalent resistance, and is parallel to one second insulation impedance, first insulation
Impedance is electrically connected between the first end of the power supply and a reference potential end, which is electrically connected at the power supply
Second end and the reference potential end between, which includes:
Selectively turn on third switch and the 4th switch；And
According to the voltage value of one of first current path and second current path, judges first insulation impedance and be somebody's turn to do
The size of second insulation impedance.
9. the method for the abnormal conducting of switch of detection battery circuit breaker as claimed in claim 8, which is characterized in that in judgement
Include: in the step of size of first insulation impedance and second insulation impedance
When the third switch conduction, the 4th switch cut-off, first current path and second current path are obtained wherein
One of one first detection voltage value；
When third switch cut-off, four switch conductions, first current path and second current path are obtained wherein
One of one second detection voltage value；And
According to the first detection voltage value, the second detection voltage value, first equivalent resistance and second equivalent resistance,
Judge first insulation impedance and the size of second insulation impedance.
10. the method for the abnormal conducting of switch of detection battery circuit breaker as claimed in claim 9, which is characterized in that the electricity
Pond breaker further includes a first resistor and a second resistance, which is series at third switch, the second resistance string
Be coupled to the 4th switch, according to this first detection voltage value and this second detection voltage value, judge first insulation impedance and
In the step of size of second insulation impedance, more according to the first resistor and the resistance value of the second resistance, judge this first
The size of insulation impedance and second insulation impedance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104139890 | 2015-11-30 | ||
| TW104139890A TWI563761B (en) | 2015-11-30 | 2015-11-30 | Battery disconnecting unit capable of determining abnormal conduction of switch and determining method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106814311A CN106814311A (en) | 2017-06-09 |
| CN106814311B true CN106814311B (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610644925.9A Expired - Fee Related CN106814311B (en) | 2015-11-30 | 2016-08-09 | Battery circuit breaker capable of detecting abnormal conduction of switch and detection method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106814311B (en) |
| TW (1) | TWI563761B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908719A (en) * | 2017-02-13 | 2017-06-30 | 上海蔚来汽车有限公司 | The diagnostic system of vehicle DC charge relay |
| JP6603695B2 (en) * | 2017-09-15 | 2019-11-06 | 矢崎総業株式会社 | Anomaly detection device |
| KR102270232B1 (en) | 2017-12-11 | 2021-06-25 | 주식회사 엘지에너지솔루션 | Method and apparatus for diagnosing fault of positive contactor of battery pack |
| KR102270233B1 (en) * | 2017-12-12 | 2021-06-25 | 주식회사 엘지에너지솔루션 | Method and apparatus for diagnosing fault of negative contactor of battery pack |
| US10777998B2 (en) * | 2018-08-02 | 2020-09-15 | GM Global Technology Operations LLC | Circuit for identifying the source of a power fault in a dual power source electrical system |
| CN110907837B (en) * | 2018-09-14 | 2021-06-08 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method |
| CN111796138B (en) * | 2019-04-08 | 2021-10-08 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method |
| TWI749339B (en) * | 2019-07-04 | 2021-12-11 | 力林科技股份有限公司 | Light emitting diode backlight system and light emitting diode control circuit |
| TWI832652B (en) * | 2022-12-30 | 2024-02-11 | 致茂電子股份有限公司 | Source measure device |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201719998A (en) | 2017-06-01 |
| CN106814311A (en) | 2017-06-09 |
| TWI563761B (en) | 2016-12-21 |
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