CN106019163B - A kind of power battery high tension loop self checking method, apparatus and system - Google Patents
A kind of power battery high tension loop self checking method, apparatus and system Download PDFInfo
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- CN106019163B CN106019163B CN201610345130.8A CN201610345130A CN106019163B CN 106019163 B CN106019163 B CN 106019163B CN 201610345130 A CN201610345130 A CN 201610345130A CN 106019163 B CN106019163 B CN 106019163B
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- tension loop
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application provides a kind of power battery high tension loop self checking method, apparatus and system, by starting timer when power battery high tension loop initializes；It obtains first voltage (voltage of the first voltage between power battery and the common end and power battery and the common end of the negative relay of high pressure master of pre-charge resistance), and when the positive relay of direct current master and the negative relay of direct current master are not present in power battery high tension loop, obtain second voltage (voltage of the second voltage between pre-charge-relay and the common end and load and the common end of the negative relay of high pressure master of the positive relay of high pressure master)；And then judge whether first voltage and second voltage meet the first default self-test condition；When meeting, determine that power battery high tension loop self-test passes through；When being unsatisfactory for, the unacceptable mode of power battery high tension loop self-test is determined, the generation of failure after realizing the self-test to power battery high tension loop, power battery high tension loop being avoided to be closed, and then guarantee vehicle safety.
Description
Technical field
This application involves field of new energy technologies, more particularly to a kind of power battery high tension loop self checking method, device
And system.
Background technique
Now with the increasingly deficienter of world petroleum resource, international, domestic major automobile all is being dedicated to sending out energetically
New-energy automobile is opened up, to advocate energy conservation, emission reduction.Wherein, it is increasingly becomed with the new-energy automobile for being driven by electricity as technical route
The mainstream selection of each cart enterprise.Components of the power battery as one of new-energy automobile the most core, since it is with high pressure
The characteristics of, therefore, for a user, the high tension loop of power battery is particularly important safely.
Power battery high tension loop self-test is to carry out before being closed power battery high tension loop to power battery high tension loop
A series of self-test processing.However, being looked into discovery most of power battery high tension loops at present does not carry out self-test processing,
If power battery high tension loop is handled without self-test, deuterogenesis's failure will increase power battery relay in high voltage loop
The number of open and close influences the service life of relay, and then brings loophole for power battery high tension loop safety, from
And seriously affect the safety of vehicle.
Therefore it provides a kind of power battery high tension loop self checking method, apparatus and system are urgently to guarantee vehicle safety
Problem to be solved.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of power battery high tension loop self checking method, apparatus and system, with reality
Now to the self-test of power battery high tension loop, avoid power battery high tension loop be closed after failure generation, and then guarantee vehicle
Safety.
To achieve the goals above, technical solution provided by the embodiments of the present application is as follows：
A kind of power battery high tension loop self checking method, the power battery high tension loop include at least：Power battery；One
The pre-charge-relay that end is connected by pre-charge resistance with the cathode of the power battery；One end and the pre-charge resistance and
The common end of power battery is connected, the positive relay of high pressure master that the other end is connected with the other end of the pre-charge-relay；One
End is connected with the common end of the pre-charge-relay and the positive relay of high pressure master, and the other end passes through the negative relay of high pressure master and institute
The connected load of the anode of power battery is stated,
This method includes：
When power battery high tension loop initialization, start timer；
First voltage is obtained, the first voltage is common end and the power of the power battery and pre-charge resistance
Voltage between battery and the common end of the negative relay of high pressure master；
Judge in the power battery high tension loop with the presence or absence of the positive relay of direct current master and the negative relay of direct current master；
When it be not present, second voltage is obtained, the second voltage is the pre-charge-relay and the positive relay of high pressure master
Voltage between the common end of device and the load and the common end of the negative relay of high pressure master；
Judge whether the first voltage and second voltage meet the first default self-test condition；
When meeting, determine that the power battery high tension loop self-test passes through；
When being unsatisfactory for, determine that the power battery high tension loop self-test does not pass through.
Preferably, when further including being connected on the pre-charge-relay and high pressure master just in the power battery high tension loop
The positive relay of direct current master between the common end of relay and the load, be connected on the load and the high pressure master it is negative after
When the negative relay of direct current master between electric appliance, this method further includes：
According to the timing timing of the timer, tertiary voltage and the 4th voltage are obtained, wherein the tertiary voltage is institute
State common end and the negative relay of direct current master and the negative relay of high pressure master of pre-charge-relay and the positive relay of high pressure master
Voltage between common end, the 4th voltage are the voltage at the load both ends；
Judge whether the first voltage, tertiary voltage and the 4th voltage meet the second default self-test condition；
When meeting, determine that the power battery high tension loop self-test passes through；
When being unsatisfactory for, determine that the power battery high tension loop self-test does not pass through.
Preferably, the process for obtaining first voltage includes：
When the present timing of the timer is less than default first time threshold, according to the timing timing of the timer
Each first target voltage corresponding with pre-set first voltage collection period is acquired, and according to each first object
Voltage obtains first voltage.
Preferably, the process for obtaining second voltage includes：
When the present timing of the timer is more than or equal to the first time threshold, and it is less than default second time threshold
When, according to the timing Timing acquisition of the timer each second target corresponding with pre-set second voltage collection period
Voltage, and second voltage is obtained according to each second target voltage.
Preferably, the process packet for judging the first voltage and second voltage and whether meeting the first default self-test condition
It includes：
When the present timing of the timer is equal to the second time threshold, power battery described in current time is obtained
The first power battery voltage at both ends；
Judge that the described first default self-test condition is according to the first voltage, second voltage and the first power battery voltage
It is no legal,
Wherein, the formula of the described first default self-test condition includes：
|BatTotalU1-Ua1b1|<Uoffset&&(Ua2b2<Uoffset), wherein BatTotalU1 is current time
The first power battery voltage at the power battery both ends, Ua1b1 are the first voltage, and Ua2b2 is the second voltage,
Uoffset is pre-set voltage；
When the described first default self-test condition is legal, determine the first voltage and second voltage meet first it is default from
Inspection condition；
When the described first default self-test condition is illegal, it is pre- to determine that the first voltage and second voltage are unsatisfactory for first
If self-test condition.
Preferably, the timing timing according to the timer, the process for obtaining tertiary voltage and the 4th voltage include：
When the timer present timing be more than or equal to the first time threshold, and be less than the second time threshold
When, according to the timing Timing acquisition of the timer each third target corresponding with pre-set tertiary voltage collection period
Voltage, and tertiary voltage is obtained according to each third target voltage；
When the present timing of the timer is more than or equal to the second time threshold, and is less than pre-set third
Between threshold value when, according to the timing Timing acquisition of the timer corresponding with the pre-set 4th voltage acquisition period each
Four target voltages, and the 4th voltage is obtained according to each 4th target voltage.
Preferably, described to judge whether the first voltage, tertiary voltage and the 4th voltage meet the second default self-test article
The process of part includes：
When being equal to the third time threshold at the current time of the timer, power battery described in current time is obtained
The second power battery voltage at both ends；
Described second is judged according to the first voltage, tertiary voltage, the 4th voltage and the second power battery voltage
Whether preset condition is legal,
Wherein, the formula of the described second default self-test condition includes：
|BatTotalU2-Ua1b1|<Uoffset(Ua3b3<Uoffset)&&(Ua4b4<Uoffset), wherein
BatTotalU2 is the second power battery voltage at power battery both ends described in current time, and Ua1b1 is the first voltage,
Ua3b3 is the tertiary voltage, and Ua4b4 is the 4th voltage, and Uoffset is pre-set voltage；
When the described second default self-test condition is legal, determine that the first voltage, tertiary voltage and the 4th voltage meet
Second default self-test condition；
When the described second default self-test condition is illegal, the first voltage, tertiary voltage and the 4th voltage are determined not
Meet the second default self-test condition.
A kind of power battery high tension loop self-checking unit, the power battery high tension loop include at least：Power battery；One
The pre-charge-relay that end is connected by pre-charge resistance with the cathode of the power battery；One end and the pre-charge resistance and
The common end of power battery is connected, the positive relay of high pressure master that the other end is connected with the other end of the pre-charge-relay；One
End is connected with the common end of the pre-charge-relay and the positive relay of high pressure master, and the other end passes through the negative relay of high pressure master and institute
The connected load of the anode of power battery is stated,
The device includes：
Timer initiation unit, for starting timer when power battery high tension loop initialization；
First acquisition unit, for obtaining first voltage, the first voltage is the power battery and pre-charge resistance
Common end and the power battery and the common end of the negative relay of high pressure master between voltage；
First judging unit, for judging in the power battery high tension loop with the presence or absence of the positive relay of direct current master and straight
The main negative relay of stream；
Second acquisition unit, for when it be not present, obtaining second voltage, the second voltage is the precharge relay
Voltage between device and the common end and the load and the common end of the negative relay of high pressure master of the positive relay of high pressure master；
Second judgment unit, for judging whether the first voltage and second voltage meet the first default self-test condition；
First determination unit, for when meeting, determining that the power battery high tension loop self-test passes through；
Second determination unit, for when being unsatisfactory for, determining that the power battery high tension loop self-test does not pass through.
Preferably, when further including being connected on the pre-charge-relay and high pressure master just in the power battery high tension loop
The positive relay of direct current master between the common end of relay and the load, be connected on the load and the high pressure master it is negative after
When the negative relay of direct current master between electric appliance, which further includes：
Third acquiring unit obtains tertiary voltage and the 4th voltage for the timing timing according to the timer,
In, common end and the direct current master negative relay of the tertiary voltage for the pre-charge-relay with the positive relay of high pressure master
Voltage between the common end of the negative relay of high pressure master, the 4th voltage are the voltage at the load both ends；
Third judging unit, for judging it is default whether the first voltage, tertiary voltage and the 4th voltage meet second
Self-test condition；
Third determination unit, for when meeting, determining that the power battery high tension loop self-test passes through；
4th determination unit, for when being unsatisfactory for, determining that the power battery high tension loop self-test does not pass through.
A kind of power battery high tension loop self-checking system, including：Power battery high tension loop described in above-mentioned any one
And power battery high tension loop self-checking unit.
The application provides a kind of power battery high tension loop self checking method, apparatus and system, by working as power battery high pressure
When circuit initializes, start timer；Obtain first voltage (first voltage be power battery and pre-charge resistance common end and
Voltage between power battery and the common end of the negative relay of high pressure master), and when there is no direct currents in power battery high tension loop
When main positive relay and the negative relay of direct current master, obtain second voltage (second voltage be pre-charge-relay and high pressure master just after
Voltage between the common end of electric appliance and load and the common end of the negative relay of high pressure master)；And then judge first voltage and second
Whether voltage meets the first default self-test condition；When meeting, determine that power battery high tension loop self-test passes through；When being unsatisfactory for
When, it determines the unacceptable mode of power battery high tension loop self-test, realizes the self-test to power battery high tension loop, avoids moving
The generation of failure after power cell high voltage loop closure, and then guarantee vehicle safety.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of power battery high tension loop structural schematic diagram provided by the embodiments of the present application；
Fig. 2 is a kind of power battery high tension loop self checking method flow chart provided by the embodiments of the present application；
Fig. 3 is another power battery high tension loop structural schematic diagram provided by the embodiments of the present application；
Fig. 4 is another power battery high tension loop self checking method flow chart provided by the embodiments of the present application；
Fig. 5 is provided by the embodiments of the present application a kind of to judge whether first voltage and second voltage meet the first default self-test
The method flow diagram of condition；
Fig. 6 is provided by the embodiments of the present application a kind of to judge whether first voltage, tertiary voltage and the 4th voltage meet the
The method flow of two default self-test conditions；
Fig. 7 is a kind of structural schematic diagram of power battery high tension loop self-checking unit provided by the embodiments of the present application；
Fig. 8 is the structural schematic diagram of another power battery high tension loop self-checking unit provided by the embodiments of the present application；
Fig. 9 is a kind of structural schematic diagram of power battery high tension loop self-checking system provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
Embodiment：
Fig. 1 is a kind of power battery high tension loop structural schematic diagram provided by the embodiments of the present application.
As shown in Figure 1, the power battery high tension loop includes at least：Power battery 11；One end passes through pre-charge resistance 12
The pre-charge-relay 13 being connected with the cathode of power battery 11；The common end of one end and pre-charge resistance 12 and power battery 11
It is connected, the positive relay 14 of the high pressure master that the other end is connected with the other end of pre-charge-relay 13；One end and pre-charge-relay
13 are connected with the common end of the positive relay 14 of high pressure master, and the other end passes through the positive phase of high pressure master negative relay 15 and power battery
Load 16 even.
It is above to be only the preferred embodiment of the embodiment of the present application, specifically, including in power battery high tension loop but unlimited
In including power battery 11, pre-charge resistance 12, pre-charge-relay 13, the positive relay 14 of high pressure master, the negative relay of high pressure master
15 and load 16.
Referring to Fig. 1 and Fig. 2, wherein Fig. 1 is a kind of power battery high tension loop structural representation provided by the embodiments of the present application
Figure；Fig. 2 is a kind of power battery high tension loop self checking method flow chart provided by the embodiments of the present application.
In conjunction with Fig. 1 and Fig. 2 it is found that a kind of power battery high tension loop self checking method provided by the embodiments of the present application includes：
S201, when power battery high tension loop initialization when, start timer；
In the embodiment of the present application, it is preferred that be power battery high tension loop before being closed power battery high tension loop
The voltage of 12V is provided, starting power battery high tension loop initialization procedure is regarded as at this time, at the beginning of power battery high tension loop
After beginningization starting, start timer first.
Above is only the preferred embodiment of the embodiment of the present application, and power electric can be arbitrarily arranged in inventor according to their own needs
The condition of pond high tension loop initialization, it is not limited here.
S202, obtain first voltage, first voltage be power battery and pre-charge resistance common end and power battery with
Voltage between the common end of the negative relay of high pressure master；
In the embodiment of the present application, it is preferred that when power battery high tension loop initialization, after starting timer, firstly,
The first voltage in power battery high tension loop need to be obtained, specifically, the first voltage is power battery 11 and pre-charge resistance
Voltage Ua1b1 between 12 common end a1 and power battery 11 and the common end b1 of the negative relay 15 of high pressure master.
S203, judge in power battery high tension loop with the presence or absence of the positive relay of direct current master and the negative relay of direct current master；When
In the absence of, execute step S204；
S204, second voltage is obtained, second voltage is the common end of pre-charge-relay and the positive relay of high pressure master and bears
Carry the voltage between the common end of the negative relay of high pressure master；
In the embodiment of the present application, it is preferred that when the positive relay of direct current master and straight is not present in power battery high tension loop
When flowing main negative relay, the second voltage in power battery high tension loop need to be obtained, specifically, the second voltage be precharge after
Between electric appliance 13 and the 16 and common end b2 of the negative relay 15 of high pressure master of common end a2 and load of the positive relay 14 of high pressure master
Voltage Ua2b2.
S205, judge whether first voltage and second voltage meet the first default self-test condition；When meeting, step is executed
S206；When being unsatisfactory for, step S207 is executed；
S206, determine that power battery high tension loop self-test passes through；
S207, determine that power battery high tension loop self-test does not pass through.
Fig. 3 is another power battery high tension loop structural schematic diagram provided by the embodiments of the present application.
As shown in figure 3, further including being connected on pre-charge-relay in a kind of power battery high tension loop of the embodiment of the present application
The positive relay 37 of direct current master between 13 and the common end and load 16 of the positive relay 14 of high pressure master, is connected on load 16 and height
The negative relay 38 of direct current master between the main negative relay 15 of pressure.
Fig. 4 is another power battery high tension loop self checking method flow chart provided by the embodiments of the present application.
In conjunction with Fig. 3 and Fig. 4 it is found that another kind power battery high tension loop self checking method packet provided by the embodiments of the present application
It includes：
S401, when power battery high tension loop initialization when, start timer；
S402, obtain first voltage, first voltage be power battery and pre-charge resistance common end and power battery with
Voltage between the common end of the negative relay of high pressure master；
S403, judge in power battery high tension loop with the presence or absence of the positive relay of direct current master and the negative relay of direct current master；When
In the absence of, execute step S404；When it is present, step S408 is executed；
S404, second voltage is obtained, second voltage is the common end of pre-charge-relay and the positive relay of high pressure master and bears
Carry the voltage between the common end of the negative relay of high pressure master；
S405, judge whether first voltage and second voltage meet the first default self-test condition；When meeting, step is executed
S406；When being unsatisfactory for, step S407 is executed；
S406, determine that power battery high tension loop self-test passes through；
S407, determine that power battery high tension loop self-test does not pass through；
The implementation procedure phase of the implementation procedure of step S401-S407 provided by the embodiments of the present application and above-mentioned S201-S207
Together, the detailed description in relation to step S401-S407 refers to the description of above-mentioned steps S201-S207, and this will not be repeated here.
S408, the timing timing according to timer obtain tertiary voltage and the 4th voltage, wherein tertiary voltage is preliminary filling
Between electrical relay and the common end and the negative relay of direct current master and the common end of the negative relay of high pressure master of the positive relay of high pressure master
Voltage, the 4th voltage be load both ends voltage；
In the embodiment of the present application, it is preferred that when judging that there are the positive relays of direct current master in power battery high tension loop
When relay negative with direct current master, S408 is executed.
In the embodiment of the present application, it is preferred that according to the timing timing of timer, tertiary voltage and the 4th voltage are obtained,
Wherein, tertiary voltage be pre-charge-relay 13 and the positive relay 14 of high pressure master common end a3 and the negative relay 38 of direct current master with
Voltage Ua3b3 between the common end b3 of the negative relay 15 of high pressure master, the 4th voltage are the voltage Ua4b4 for loading both ends.
S409, judge whether first voltage, tertiary voltage and the 4th voltage meet the second default self-test condition；Work as satisfaction
When, execute step S410；When being unsatisfactory for, step S411 is executed；
S410, determine that power battery high tension loop self-test passes through；
In the embodiment of the present application, it is preferred that when first voltage, tertiary voltage and the 4th voltage meet the second default self-test
When condition, determine that power battery high tension loop self-test passes through.
S411, determine that power battery high tension loop self-test does not pass through.
In the embodiment of the present application, it is preferred that preset certainly when first voltage, tertiary voltage and the 4th voltage are unsatisfactory for second
When inspection condition, determine that power battery high tension loop self-test does not pass through.
In the embodiment of the present application, it is preferred that the process for obtaining first voltage includes：When the present timing of timer is less than
It is corresponding with pre-set first voltage collection period according to the timing Timing acquisition of timer when default first time threshold
Each first target voltage, and first voltage is obtained according to each first target voltage.
In the embodiment of the present application, it is preferred that first voltage collection period is previously provided with, when power battery high tension loop
Initialization, after starting timer, when the present timing of timer is less than pre-set first time threshold, according to timer
Timing timing acquire the public of a power battery and pre-charge resistance whenever reaching a first voltage collection period
End and the voltage between power battery and the common end of the negative relay of high pressure master, and using collected voltage as first object electricity
Pressure, and by the collected first target voltage of last time as first voltage.
Above is only the preferred embodiment of the embodiment of the present application, and inventor can be arbitrarily arranged according to their own needs from acquisition
To each first target voltage in determine first voltage mode, it is not limited here.
In the embodiment of the present application, it is preferred that the process for obtaining second voltage includes：When the present timing of timer is greater than
Equal to first time threshold, and when being less than default second time threshold, timing Timing acquisition according to timer with preset
Corresponding each second target voltage of second voltage collection period, and second voltage is obtained according to each second target voltage.
In the embodiment of the present application, it is preferred that when will judge in power battery high tension loop with the presence or absence of direct current master just after
When the time of electric appliance and the negative relay of direct current master ignores, when judge in power battery high tension loop there are direct current master just after
When electric appliance and the negative relay of direct current master, second voltage is obtained.Specifically, the process for obtaining second voltage includes：Preset
Two voltage acquisition periods when the present timing of timer is more than or equal to first time threshold, and were less than default second time threshold
When, according to the timing timing of timer, whenever reaching a second voltage collection period, acquire a pre-charge-relay with
Voltage between the common end of the positive relay of high pressure master and load and the common end of the negative relay of high pressure master, and by collected electricity
Pressure is used as the second target voltage, and by collected second target voltage of last time as second voltage.
Above is only the preferred embodiment of the embodiment of the present application, and inventor can be arbitrarily arranged according to their own needs from acquisition
To each second target voltage in determine second voltage mode, it is not limited here.
Also, the embodiment of the present application is not also to judging in power battery high tension loop with the presence or absence of the positive relay of direct current master
It is defined with the time of the negative relay of direct current master, in order to obtain more accurate second voltage, in the embodiment of the present application, also
It can be from the meter for the timer for judging to be not present the positive relay of direct current master and the negative relay of direct current master in power battery high tension loop
When the moment, to timer timer time be less than second time threshold when, according to the timing timing of timer, whenever arrival
When one second voltage collection period, acquires the common end an of pre-charge-relay and the positive relay of high pressure master and load and height
Voltage between the common end of the main negative relay of pressure, and using collected voltage as the second target voltage, and according to each the
Two target voltages obtain second voltage.
Fig. 5 is provided by the embodiments of the present application a kind of to judge whether first voltage and second voltage meet the first default self-test
The method flow diagram of condition.
As shown in figure 5, this method includes：
S501, when the present timing of timer is equal to second time threshold, obtain current time power battery both ends
First power battery voltage；
In the embodiment of the present application, it is preferred that when the present timing of timer is equal to second time threshold, obtain current
The first power battery voltage BatTotalU1 at moment power battery both ends.
In the embodiment of the present application, it is preferred that power battery is made of several knot power batteries, current when timer
When timing is equal to second time threshold, the mode for obtaining the first power battery voltage at current time power battery both ends is：When
When the present timing of timer is equal to second time threshold, the sub- power at every sub- power battery both ends of current time is measured respectively
Cell voltage, and the result that the sub- power battery voltage at all sub- power battery both ends in power battery is added is as current
First power battery voltage of moment power battery.
S502, whether the first default self-test condition is judged according to first voltage, second voltage and the first power battery voltage
It is legal；When the first default self-test condition is legal, step S503 is executed；When the first default self-test condition is illegal, step is executed
Rapid S504；
In the embodiment of the present application, it is preferred that the formula of the first default self-test condition includes：
|BatTotalU1-Ua1b1|<Uoffset&&(Ua2b2<Uoffset), wherein BatTotalU1 is current time
The first power battery voltage at power battery both ends, Ua1b1 are first voltage, and Ua2b2 is second voltage, and Uoffset is preparatory
The voltage of setting.
In the embodiment of the present application, it is preferred that the occurrence inventor of Uoffset can arbitrarily set according to their own needs
It sets, it is not limited here.
S503, determine that first voltage and second voltage meet the first default self-test condition；
S504, determine that first voltage and second voltage are unsatisfactory for the first default self-test condition.
In the embodiment of the present application, it is preferred that according to the timing timing of timer, obtain tertiary voltage and the 4th voltage
Process includes：
When the present timing of timer is more than or equal to first time threshold, and is less than second time threshold, according to timing
The timing Timing acquisition of device each third target voltage corresponding with pre-set tertiary voltage collection period, and according to each
Third target voltage obtains tertiary voltage；And when the present timing of timer is more than or equal to second time threshold, and it is less than pre-
Timing Timing acquisition and pre-set 4th voltage acquisition period pair when the third time threshold being first arranged, according to timer
Each 4th target voltage answered, and the 4th voltage is obtained according to each 4th target voltage.
In the embodiment of the present application, it is preferred that when judging that there are the positive relays of direct current master in power battery high tension loop
When relay negative with direct current master, according to the timing timing of timer, tertiary voltage and the 4th voltage are obtained.
In the embodiment of the present application, it is preferred that when will judge in power battery high tension loop with the presence or absence of direct current master just after
When the time of electric appliance and the negative relay of direct current master ignores, according to the timing timing of timer, tertiary voltage and the 4th is obtained
The process of voltage includes：When the present timing of timer is more than or equal to first time threshold, and is less than second time threshold, press
A pre-charge-relay and high pressure are acquired whenever reaching a tertiary voltage collection period according to the timing timing of timer
Voltage between the common end and the negative relay of direct current master and the common end of the negative relay of high pressure master of main positive relay, and will acquisition
The voltage arrived incites somebody to action the collected third target voltage of last time as tertiary voltage as third target voltage；And when
The present timing of timer be more than or equal to second time threshold, and be less than pre-set third time threshold when, according to timing
The timing timing of device, whenever reaching a 4th voltage acquisition period, the voltage at acquisition load both ends, and by collected electricity
Pressure is used as the 4th target voltage, and by collected 4th target voltage of last time as the 4th voltage.
Above is only the preferred embodiment of the embodiment of the present application, and inventor can be arbitrarily arranged according to their own needs from acquisition
To each third target voltage in determine tertiary voltage mode, and/or, from collected each 4th target voltage really
The mode of fixed 4th voltage, it is not limited here.
Also, the embodiment of the present application is not also to judging in power battery high tension loop with the presence or absence of the positive relay of direct current master
It is defined with the time of the negative relay of direct current master, in order to obtain more accurate tertiary voltage, in the embodiment of the present application, also
It can be from judging that there are the timing of the positive relay of direct current master and the timer of the negative relay of direct current master in power battery high tension loop
Moment, when being less than second time threshold to the timer time of timer, according to the timing timing of timer, whenever reaching one
When a tertiary voltage collection period, acquire a pre-charge-relay and the positive relay of high pressure master common end and direct current master it is negative after
Voltage between electric appliance and the common end of the negative relay of high pressure master, and using collected voltage as third target voltage, and root
Tertiary voltage is obtained according to each third target voltage.
In the embodiment of the present application, it is preferred that pre-set first voltage collection period, second voltage collection period,
Tertiary voltage collection period and the numerical value in the 4th voltage acquisition period may be the same or different, specifically, inventor can be according to oneself
Demand first voltage collection period, second voltage collection period, tertiary voltage collection period and the 4th voltage are arbitrarily set adopt
Collect the specific value in period, it is not limited here.
Fig. 6 is provided by the embodiments of the present application a kind of to judge whether first voltage, tertiary voltage and the 4th voltage meet the
The method flow of two default self-test conditions.
As shown in fig. 6, this method includes：
S601, when being equal to third time threshold at the current time of timer, obtain current time power battery both ends
Second power battery voltage；
In the embodiment of the present application, it is preferred that when being equal to third time threshold at the current time of timer, obtain current
The second power voltage BatTotalU2 at moment power battery both ends.
In the embodiment of the present application, it is preferred that power battery is made of several knot power batteries, current when timer
When moment is equal to third time threshold, the mode for obtaining the second power voltage at current time power battery both ends is：Work as timing
When the current time of device is equal to third time threshold, the sub- power battery at every sub- power battery both ends of current time is measured respectively
Voltage, and the result that the sub- power battery voltage at all sub- power battery both ends in power battery is added is as current time
Second power battery voltage of power battery.
S602, the second preset condition is judged according to first voltage, tertiary voltage, the 4th voltage and the second power battery voltage
It is whether legal；When the second default self-test condition is legal, step S603 is executed；When the second default self-test condition is illegal, hold
Row step S604；
In the embodiment of the present application, it is preferred that the formula of the second default self-test condition includes：
|BatTotalU2-Ua1b1|<Uoffset(Ua3b3<Uoffset)&&(Ua4b4<Uoffset), wherein
BatTotalU2 is the second power battery voltage at current time power battery both ends, and Ua1b1 is first voltage, Ua3b3 the
Three voltages, Ua4b4 are the 4th voltage, and Uoffset is pre-set voltage.
S603, determine that first voltage, tertiary voltage and the 4th voltage meet the second default self-test condition；
S604, determine that first voltage, tertiary voltage and the 4th voltage are unsatisfactory for the second default self-test condition.
Fig. 7 is a kind of structural schematic diagram of power battery high tension loop self-checking unit provided by the embodiments of the present application.
It is high that power battery high tension loop self-checking unit as shown in Figure 7 provided by the embodiments of the present application is applied to power battery
Road is pushed back, which includes at least：Power battery；One end passes through the cathode of pre-charge resistance and power battery
Connected pre-charge-relay；One end is connected with the common end of pre-charge resistance and power battery, the other end and precharge relay
The connected positive relay of high pressure master of the other end of device；The common end phase of one end and pre-charge-relay and the positive relay of high pressure master
Even, the other end passes through the load that the negative relay of high pressure master is connected with the anode of power battery.
As shown in fig. 7, the device includes：
Timer initiation unit 71, for starting timer when power battery high tension loop initialization；
First acquisition unit 72, for obtaining first voltage, first voltage is the public of power battery and pre-charge resistance
End and the voltage between power battery and the common end of the negative relay of high pressure master；
First judging unit 73, for judging in power battery high tension loop with the presence or absence of the positive relay of direct current master and direct current
Main negative relay；
Second acquisition unit 74, for when it be not present, obtaining second voltage, second voltage is pre-charge-relay and height
Voltage between the common end and load and the common end of the negative relay of high pressure master of the main positive relay of pressure；
Second judgment unit 75, for judging whether first voltage and second voltage meet the first default self-test condition；
First determination unit 76, for when meeting, determining that power battery high tension loop self-test passes through；
Second determination unit 77, for when being unsatisfactory for, determining that power battery high tension loop self-test does not pass through.
Further, when further including being connected on pre-charge-relay and the positive relay of high pressure master in power battery high tension loop
Common end and load between the positive relay of direct current master, it is negative to be connected on direct current master between load and the negative relay of high pressure master
When relay, the structural schematic diagram of another kind power battery high tension loop self-checking unit provided by the embodiments of the present application refers to figure
8。
In conjunction with Fig. 7 and Fig. 8 it is found that power battery high tension loop self-test dress as shown in Figure 8 provided by the embodiments of the present application
It sets for power battery high tension loop self-checking unit as shown in Figure 7, further comprises：
Third acquiring unit 81 obtains tertiary voltage and the 4th voltage for the timing timing according to timer, wherein
Common end and direct current master negative relay and high pressure master negative relay of the tertiary voltage for pre-charge-relay and the positive relay of high pressure master
Voltage between the common end of device, the 4th voltage are the voltage for loading both ends；
Third judging unit 82 is preset certainly for judging whether first voltage, tertiary voltage and the 4th voltage meet second
Inspection condition；
Third determination unit 83, for when meeting, determining that power battery high tension loop self-test passes through；
4th determination unit 84, for when being unsatisfactory for, determining that power battery high tension loop self-test does not pass through.
Fig. 9 is a kind of structural schematic diagram of power battery high tension loop self-checking system provided by the embodiments of the present application.
As shown in figure 9, the embodiment of the present application provides a kind of power battery high tension loop self-checking system, including above-described embodiment
Provided power battery high tension loop 91 and power battery high tension loop self-test applied to power battery high tension loop 91
Device 92.
The application provides a kind of power battery high tension loop self checking method, apparatus and system, by working as power battery high pressure
When circuit initializes, start timer；Obtain first voltage (first voltage be power battery and pre-charge resistance common end and
Voltage between power battery and the common end of the negative relay of high pressure master), and when there is no direct currents in power battery high tension loop
When main positive relay and the negative relay of direct current master, obtain second voltage (second voltage be pre-charge-relay and high pressure master just after
Voltage between the common end of electric appliance and load and the common end of the negative relay of high pressure master)；And then judge first voltage and second
Whether voltage meets the first default self-test condition；When meeting, determine that power battery high tension loop self-test passes through；When being unsatisfactory for
When, it determines the unacceptable mode of power battery high tension loop self-test, realizes the self-test to power battery high tension loop, avoids moving
The generation of failure after power cell high voltage loop closure, and then guarantee vehicle safety.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The above is only the preferred embodiment of the application, make skilled artisans appreciate that or realization the application.It is right
A variety of modifications of these embodiments will be apparent to one skilled in the art, general original as defined herein
Reason can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application will not
Be intended to be limited to the embodiments shown herein, and be to fit to it is consistent with the principles and novel features disclosed in this article most
Wide range.
Claims (8)
1. a kind of power battery high tension loop self checking method, the power battery high tension loop is included at least：Power battery；One end
The pre-charge-relay being connected by pre-charge resistance with the cathode of the power battery；It one end and the pre-charge resistance and moves
The common end of power battery is connected, the positive relay of high pressure master that the other end is connected with the other end of the pre-charge-relay；One end
Be connected with the common end of the pre-charge-relay and the positive relay of high pressure master, the other end by the negative relay of high pressure master with it is described
The connected load of the anode of power battery, which is characterized in that
This method includes：
When power battery high tension loop initialization, start timer；
First voltage is obtained, the first voltage is common end and the power battery of the power battery and pre-charge resistance
Voltage between the common end of the negative relay of high pressure master；
Judge in the power battery high tension loop with the presence or absence of the positive relay of direct current master and the negative relay of direct current master；
When it be not present, second voltage is obtained, the second voltage is the pre-charge-relay and the positive relay of high pressure master
Voltage between common end and the load and the common end of the negative relay of high pressure master；
Judge whether the first voltage and second voltage meet the first default self-test condition；
When meeting, determine that the power battery high tension loop self-test passes through；
When being unsatisfactory for, determine that the power battery high tension loop self-test does not pass through；
When further including the public affairs for being connected on the pre-charge-relay and the positive relay of high pressure master in the power battery high tension loop
The positive relay of direct current master between end and the load altogether is connected between the load and the negative relay of high pressure master
When the negative relay of direct current master, this method further includes：
According to the timing timing of the timer, tertiary voltage and the 4th voltage are obtained, wherein the tertiary voltage is described pre-
The common end of charge relay and the positive relay of high pressure master and the negative relay of direct current master are public with the negative relay of high pressure master
Voltage between end, the 4th voltage are the voltage at the load both ends；
Judge whether the first voltage, tertiary voltage and the 4th voltage meet the second default self-test condition；
When meeting, determine that the power battery high tension loop self-test passes through；
When being unsatisfactory for, determine that the power battery high tension loop self-test does not pass through.
2. the method according to claim 1, wherein the process for obtaining first voltage includes：
When the present timing of the timer is less than default first time threshold, according to the timing Timing acquisition of the timer
Each first target voltage corresponding with pre-set first voltage collection period, and according to each first target voltage
Obtain first voltage.
3. according to the method described in claim 2, it is characterized in that, the process for obtaining second voltage includes：
When the present timing of the timer is more than or equal to the first time threshold, and is less than default second time threshold,
According to the timing Timing acquisition of the timer each second target electricity corresponding with pre-set second voltage collection period
Pressure, and second voltage is obtained according to each second target voltage.
4. according to the method described in claim 3, it is characterized in that, described judge whether the first voltage and second voltage are full
The process of the first default self-test condition includes enough：
When the present timing of the timer is equal to the second time threshold, power battery both ends described in current time are obtained
The first power battery voltage；
Judge whether the described first default self-test condition closes according to the first voltage, second voltage and the first power battery voltage
Method,
Wherein, the formula of the described first default self-test condition includes：
|BatTotalU1-Ua1b1|<Uoffset&&(Ua2b2<Uoffset), wherein BatTotalU1 is described in current time
The first power battery voltage at power battery both ends, Ua1b1 are the first voltage, and Ua2b2 is the second voltage,
Uoffset is pre-set voltage；
When the described first default self-test condition is legal, determine that the first voltage and second voltage meet the first default self-test item
Part；
When the described first default self-test condition is illegal, determine the first voltage and second voltage be unsatisfactory for first it is default from
Inspection condition.
5. according to the method described in claim 4, it is characterized in that, the timing timing according to the timer, the is obtained
The process of three voltages and the 4th voltage includes：
When the present timing of the timer is more than or equal to the first time threshold, and is less than the second time threshold,
According to the timing Timing acquisition of the timer each third target electricity corresponding with pre-set tertiary voltage collection period
Pressure, and tertiary voltage is obtained according to each third target voltage；
When the timer present timing be more than or equal to the second time threshold, and be less than pre-set third time threshold
When value, according to the timing Timing acquisition of the timer each 4th mesh corresponding with the pre-set 4th voltage acquisition period
Voltage is marked, and the 4th voltage is obtained according to each 4th target voltage.
6. according to the method described in claim 5, it is characterized in that, the judgement first voltage, tertiary voltage and the 4th
The process whether voltage meets the second default self-test condition includes：
When being equal to the third time threshold at the current time of the timer, power battery both ends described in current time are obtained
The second power battery voltage；
Judge that described second is default according to the first voltage, tertiary voltage, the 4th voltage and the second power battery voltage
Whether condition is legal,
Wherein, the formula of the described second default self-test condition includes：
|BatTotalU2-Ua1b1|<Uoffset(Ua3b3<Uoffset)&&(Ua4b4<Uoffset), wherein
BatTotalU2 is the second power battery voltage at power battery both ends described in current time, and Ua1b1 is the first voltage,
Ua3b3 is the tertiary voltage, and Ua4b4 is the 4th voltage, and Uoffset is pre-set voltage；
When the described second default self-test condition is legal, determine that the first voltage, tertiary voltage and the 4th voltage meet second
Default self-test condition；
When the described second default self-test condition is illegal, determine that the first voltage, tertiary voltage and the 4th voltage are unsatisfactory for
Second default self-test condition.
7. a kind of power battery high tension loop self-checking unit, the power battery high tension loop is included at least：Power battery；One end
The pre-charge-relay being connected by pre-charge resistance with the cathode of the power battery；It one end and the pre-charge resistance and moves
The common end of power battery is connected, the positive relay of high pressure master that the other end is connected with the other end of the pre-charge-relay；One end
Be connected with the common end of the pre-charge-relay and the positive relay of high pressure master, the other end by the negative relay of high pressure master with it is described
The connected load of the anode of power battery, which is characterized in that
The device includes：
Timer initiation unit, for starting timer when power battery high tension loop initialization；
First acquisition unit, for obtaining first voltage, the first voltage is the public affairs of the power battery and pre-charge resistance
End and the voltage between the power battery and the common end of the negative relay of high pressure master altogether；
First judging unit, for judging in the power battery high tension loop with the presence or absence of the positive relay of direct current master and direct current master
Negative relay；
Second acquisition unit obtains second voltage for when it be not present, the second voltage be the pre-charge-relay with
Voltage between the common end of the positive relay of high pressure master and the load and the common end of the negative relay of high pressure master；
Second judgment unit, for judging whether the first voltage and second voltage meet the first default self-test condition；
First determination unit, for when meeting, determining that the power battery high tension loop self-test passes through；
Second determination unit, for when being unsatisfactory for, determining that the power battery high tension loop self-test does not pass through；
When further including the public affairs for being connected on the pre-charge-relay and the positive relay of high pressure master in the power battery high tension loop
The positive relay of direct current master between end and the load altogether is connected between the load and the negative relay of high pressure master
When the negative relay of direct current master, which further includes：
Third acquiring unit obtains tertiary voltage and the 4th voltage, wherein institute for the timing timing according to the timer
State the common end and the negative relay of direct current master and height that tertiary voltage is the pre-charge-relay and the positive relay of high pressure master
Voltage between the common end of the main negative relay of pressure, the 4th voltage are the voltage at the load both ends；
Third judging unit, for judging whether the first voltage, tertiary voltage and the 4th voltage meet the second default self-test
Condition；
Third determination unit, for when meeting, determining that the power battery high tension loop self-test passes through；
4th determination unit, for when being unsatisfactory for, determining that the power battery high tension loop self-test does not pass through.
8. a kind of power battery high tension loop self-checking system, which is characterized in that including：Described in claim 6-7 any one
Power battery high tension loop and power battery high tension loop self-checking unit.
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| CN117723958A (en) * | 2017-10-23 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit and method, detector, system, vehicle and medium |
| CN107599848B (en) * | 2017-10-23 | 2023-11-17 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN112677768B (en) * | 2020-04-01 | 2022-11-01 | 长城汽车股份有限公司 | Method and system for determining connection reliability of vehicle high-voltage circuit |
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| CN102175971A (en) * | 2011-02-18 | 2011-09-07 | 奇瑞汽车股份有限公司 | Relay state detection method and device of electric vehicle high-voltage system |
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