CN104836294B - A kind of charge control method of pre-charge circuit - Google Patents
A kind of charge control method of pre-charge circuit Download PDFInfo
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- CN104836294B CN104836294B CN201510234294.9A CN201510234294A CN104836294B CN 104836294 B CN104836294 B CN 104836294B CN 201510234294 A CN201510234294 A CN 201510234294A CN 104836294 B CN104836294 B CN 104836294B
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Abstract
The invention discloses a kind of charge control method of pre-charge circuit, including：In pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay voltage difference；Judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is less than electric current preset value, if then precharge is completed.The present invention is by judging while voltage difference and charging current, effectively judging whether pre-charge process is completed.
Description
Technical field
The present invention relates to recharge technique field, more particularly to a kind of charge control method of pre-charge circuit.
Background technology
At present, line precharge is entered by pre-charge circuit and mainly uses following two modes, one kind is by detecting bus
Voltage, direct attracting electric relay after busbar voltage reaches setting value, another kind are to establish beginning delay one by cable from pre-charge circuit
Attracting electric relay after the section time.Applicant is it has been investigated that whether above two method effectively can not judge pre-charge process
Complete, can not also judge pre-charge circuit whether failure, adverse effect can be brought to pre-charge process.First method is in preliminary filling
Busbar voltage is unable to reach setting value so that controller can not work when circuit breaks down；Second method is being pre-charged
Pre-charge current is unable to reach setting value when circuit breaks down, and attracting electric relay can cause very big adhesive electricity after the time reaches
Stream, the electric current is harmful to relay, or even can directly contribute the adhesion of relay contacts end, so that the life-span of reduction relay.
The content of the invention
The invention provides a kind of charge control method of pre-charge circuit, during precharge, can effectively sentence
Whether disconnected pre-charge process is completed.
The invention provides a kind of charge control method of pre-charge circuit, including：
In pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay voltage difference；
Judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is pre- less than electric current
If value, if judging, the voltage difference of the relay is less than voltage preset value, and the charging current is less than electric current preset value then：
Precharge is completed.
Preferably, if whether the voltage difference for judging the relay is less than voltage preset value, and the charging current
Whether be less than electric current preset value result be it is no, then：
Judge whether the voltage difference of the relay is more than the voltage preset value, and whether the charging current is more than institute
Electric current preset value is stated, the voltage difference of the relay is more than the voltage preset value if judging, and the charging current is more than institute
State electric current preset value then：
Continue to be pre-charged.
Preferably, it is described in pre-charge process, obtain the charging current of pre-charge circuit and the relay within the sampling time
Also include before the voltage difference of device：
Be pre-charged start when, be provided for judging pre-charge circuit whether after the counting clearing of the failure counter of failure
Start counting up；
The voltage difference for judging the relay is more than the voltage preset value, and the charging current is more than the electricity
After the result for flowing preset value, in addition to：
Judge whether the count value of the failure counter is more than preset failure value, if judging the meter of the failure counter
Numerical value is less than or equal to preset failure value, then：
Continue to be pre-charged.
Preferably, if the result whether count value for judging the failure counter is more than preset failure value is yes,
Then：
Judge pre-charge circuit failure, terminate precharge.
Preferably, if the voltage difference for judging the relay is more than the voltage preset value, and the charging current
Less than or equal to the electric current preset value；Or judge that the voltage difference of the relay is less than or equal to the voltage preset value, and
The charging current is more than the electric current preset value, then：
Set failure counter to count and add N, wherein N is positive integer.
Preferably, the failure counter is set to subtract M after the first preset time is reached, wherein M is positive integer.
Preferably, whether the voltage difference for judging the relay is less than voltage preset value, and the charging current is
The no electric current preset value that is less than also includes before：
Judge whether precharge time is less than the second preset time, if it is default to judge that precharge time is more than or equal to second
Time is then：
Set failure counter to count and add N, wherein N is positive integer.
Preferably, described to judge whether precharge time is less than the second preset time, if judging, precharge time is less than the
Two preset times are then：
Judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is pre- less than electric current
If value.
Preferably, the voltage preset value is 1V-5V.
Preferably, the electric current preset value is 0-0.5A.
From such scheme, a kind of charge control method of pre-charge circuit provided by the invention, by being pre-charged
During obtain pre-charge circuit charging current and within the sampling time relay voltage difference, by whether judging voltage difference
Less than voltage preset value, and whether charging current is less than electric current preset value, when meeting simultaneously, completes precharge.By to electricity
Judge while pressure difference and charging current, can effectively judge whether pre-charge process is completed.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of charge control method flow chart of pre-charge circuit disclosed in the embodiment of the present invention；
Fig. 2 is a kind of charge control method flow chart of pre-charge circuit disclosed in another embodiment of the present invention；
Fig. 3 is a kind of charge control method flow chart of pre-charge circuit disclosed in another embodiment of the present invention；
Fig. 4 is a kind of charge control method flow chart of pre-charge circuit disclosed in another embodiment of the present invention；
Fig. 5 is a kind of charge control method flow chart of pre-charge circuit disclosed in another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, be a kind of charge control method of pre-charge circuit disclosed in the embodiment of the present invention, including：
S101, in pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay electricity
Pressure difference；
S102, judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is less than
Electric current preset value, if then entering step S103：
S103, precharge are completed.
Specifically, the operation principle of above-described embodiment is：In pre-charge process, by before and after constantly detecting the sampling time
The voltage of the relay of two time, the voltage difference of the relay within the sampling time is got, while preliminary filling is flowed through in detection in real time
The electric current of circuit, get the charging current of pre-charge circuit.Then judge whether the voltage difference of relay is pre- less than voltage
If value, wherein, voltage preset value is the preset value pre-set according to different relays；Judge whether charging current is small simultaneously
In electric current preset value, wherein, electric current preset value is the preset value pre-set according to different relays.When the voltage of relay
Difference is less than voltage preset value, and when the charging current of pre-charge circuit is less than electric current preset value, then judges the pre-charge circuit
Pre-charge process is completed.The present embodiment is during precharge, by judging while voltage difference and charging current, phase
For in the prior art, by detecting busbar voltage or delay a period of time attracting electric relay, can effectively judge to be pre-charged
Whether process is completed, and can solve the problem that because of the relay that only detection busbar voltage or delay a period of time bring with regard to attracting electric relay
The problem of frequent adhesive, extend the service life of relay..
As shown in Fig. 2 be a kind of charge control method of pre-charge circuit disclosed in another embodiment of the present invention, including：
S201, in pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay electricity
Pressure difference；
S202, judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is less than
Electric current preset value, if then entering step S203, if otherwise entering step S204：
S203, precharge are completed；
S204, judge whether the voltage difference of relay is more than the voltage preset value, and whether charging current is more than described
Electric current preset value, if then entering step S205：
S205, continue to be pre-charged.
Specifically, the operation principle of above-described embodiment is：In pre-charge process, by before and after constantly detecting the sampling time
The voltage of the relay of two time, the voltage difference of the relay within the sampling time is got, while preliminary filling is flowed through in detection in real time
The electric current of circuit, get the charging current of pre-charge circuit.
Then judge whether the voltage difference of relay is less than voltage preset value, wherein, voltage preset value is according to different
The preset value that relay is pre-set, generally 1V-5V；Judge whether charging current is less than electric current preset value simultaneously, wherein, electricity
Preset value is flowed for the preset value pre-set according to different relays, generally 0-0.5A.
When the voltage difference of relay is less than voltage preset value, and the charging current of pre-charge circuit is less than electric current preset value
When, then judge that the pre-charge circuit has completed pre-charge process.
When the voltage difference of relay is more than voltage preset value, and the charging current of pre-charge circuit is more than electric current preset value
When, then judge that the pre-charge process is not yet completed, control the pre-charge circuit to continue to be pre-charged.
The present embodiment is during precharge, by judging while voltage difference and charging current, passing through detection mother
Line voltage or delay a period of time attracting electric relay, can effectively judge whether pre-charge process is completed, and can solve the problem that because
The problem of relay that only detection busbar voltage or delay a period of time are brought with regard to attracting electric relay frequent adhesive, extend relay
The service life of device.
The present invention is on the basis of above-described embodiment, also by setting failure counter to judge whether pre-charge circuit is sent out
Raw failure.Be pre-charged start when, set pre-charge circuit in be used for judge pre-charge circuit whether the failure counter of failure
Counting reset, when pre-charge process is unsatisfactory for preparatory condition, failure counter starts counting up.In pre-charge process, lead to
Whether the counting for crossing failure judgement counter is more than preset failure value to judge whether pre-charge circuit breaks down.Specifically,
The implementation of control and breakdown judge to pre-charge circuit is as described below.
As shown in figure 3, be a kind of charge control method of pre-charge circuit disclosed in another embodiment of the present invention, including：
S301, be pre-charged start when, be provided for judging pre-charge circuit whether the counting of the failure counter of failure
Started counting up after clearing；
S302, in pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay electricity
Pressure difference；
S303, judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is less than
Electric current preset value, if then entering step S304, if otherwise entering step S305：
S304, precharge are completed；
S305, judge whether the voltage difference of relay is more than the voltage preset value, and whether charging current is more than described
Electric current preset value, if then entering step S306, if otherwise entering step S307：
S306, continue to be pre-charged；
S307, failure counter counting plus N are set, wherein N is positive integer；
S308, judge whether the count value of the failure counter is more than preset failure value, if it is not, then entering step
S306, if then entering step S309：
S309, judge pre-charge circuit failure, terminate precharge.
Specifically, the operation principle of above-described embodiment is：When being pre-charged beginning, will be used for whether judging pre-charge circuit
The counting of the failure counter of failure starts counting up after resetting.
In pre-charge process, the voltage of the relay by constantly detecting former and later two times in sampling time, get
The voltage difference of relay within the sampling time, while the electric current of pre-charge circuit is flowed through in detection in real time, gets pre-charge circuit
Charging current.
Then judge whether the voltage difference of relay is less than voltage preset value, wherein, voltage preset value is according to different
The preset value that relay is pre-set, generally 1V-5V；Judge whether charging current is less than electric current preset value simultaneously, wherein, electricity
Preset value is flowed for the preset value pre-set according to different relays, generally 0-0.5A.
When whether the voltage difference for judging relay is less than voltage preset value, and judge whether charging current is preset less than electric current
The result of value is when being, then judges that the pre-charge circuit has completed pre-charge process.
When the voltage difference of the relay is more than or equal to voltage preset value, and the charging current is more than or equal to electric current
Preset value, continues to judge whether the voltage difference of relay is more than voltage preset value, and whether the charging current of pre-charge circuit is big
In electric current preset value.When whether the voltage difference for judging relay is more than voltage preset value, and the charging current of pre-charge circuit is
The no result more than electric current preset value is when being, control pre-charge circuit continues to be pre-charged；When the electricity for judging relay
Whether pressure difference is more than voltage preset value, and it is no that whether the charging current of pre-charge circuit, which is more than the result of electric current preset value,
When, set failure counter to count and add N, wherein N is positive integer；
In whole pre-charge process, whether the count value of real-time judge failure counter is more than preset failure value, when sentencing
When disconnected result is no, control pre-charge circuit continues to be pre-charged, and when judged result is to be, judges pre-charge circuit now
Break down, control pre-charge circuit terminates to be pre-charged.
The present embodiment is during precharge, by judging while voltage difference and charging current, relative to existing
In technology, by detecting busbar voltage or delay a period of time attracting electric relay, effectively whether pre-charge process can be judged
Complete, and can solve the problem that because of the frequent adhesive of relay that only detection busbar voltage or delay a period of time bring with regard to attracting electric relay
The problem of, extend the service life of relay.Meanwhile when whether the voltage difference for judging relay is more than voltage preset value, in advance
Whether the charging current of charging circuit is more than electric current preset value, and the judged result of only one of which is yes in the two conditions
When, increase the counting of failure counter, in whole pre-charge process, by the count value of real-time failure judgement counter,
It can interpolate that out whether pre-charge circuit breaks down in pre-charge process.
As shown in figure 4, be a kind of charge control method of pre-charge circuit disclosed in another embodiment of the present invention, including：
S401, be pre-charged start when, be provided for judging pre-charge circuit whether the counting of the failure counter of failure
Started counting up after clearing；
S402, in pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay electricity
Pressure difference；
S403, judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is less than
Electric current preset value, if then entering step S404, if otherwise entering step S405：
S404, precharge are completed；
S405, judge whether the voltage difference of relay is more than the voltage preset value, and whether charging current is more than described
Electric current preset value, if then entering step S406, if otherwise entering step S407：
S406, continue to be pre-charged；
S407, failure counter counting plus N are set, wherein N is positive integer；
S408, the failure counter is set to subtract M after the first preset time is reached, wherein M is positive integer；
S409, judge whether the count value of the failure counter is more than preset failure value, if it is not, then entering step
S406, if then entering step S410：
S410, judge pre-charge circuit failure, terminate precharge.
Specifically, the operation principle of above-described embodiment is：When being pre-charged beginning, will be used for whether judging pre-charge circuit
The counting of the failure counter of failure starts counting up after resetting.
In pre-charge process, the voltage of the relay by constantly detecting former and later two times in sampling time, get
The voltage difference of relay within the sampling time, while the electric current of pre-charge circuit is flowed through in detection in real time, gets pre-charge circuit
Charging current.
Then judge whether the voltage difference of relay is less than voltage preset value, wherein, voltage preset value is according to different
The preset value that relay is pre-set, generally 1V-5V；Judge whether charging current is less than electric current preset value simultaneously, wherein, electricity
Preset value is flowed for the preset value pre-set according to different relays, generally 0-0.5A.
When whether the voltage difference for judging relay is less than voltage preset value, and judge whether charging current is preset less than electric current
The result of value is when being, then judges that the pre-charge circuit has completed pre-charge process.
When the voltage difference of the relay is more than or equal to voltage preset value, and the charging current is more than or equal to electric current
Preset value, continues to judge whether the voltage difference of relay is more than voltage preset value, and whether the charging current of pre-charge circuit is big
In electric current preset value.When whether the voltage difference for judging relay is more than voltage preset value, and the charging current of pre-charge circuit is
The no result more than electric current preset value is when being, control pre-charge circuit continues to be pre-charged.
When whether the voltage difference for judging relay is more than voltage preset value, and whether the charging current of pre-charge circuit is more than
When the result of electric current preset value is no, i.e., when whether the voltage difference for judging relay is more than voltage preset value, pre-charge circuit
Charging current whether be more than electric current preset value, in the two conditions the judged result of only one of which when being, to set therefore
Barrier rolling counters forward adds N, wherein N to be positive integer, for example, 1；In whole pre-charge process, when failure counter reaches the
After one preset time, set failure counter to count and subtract M, wherein M is positive integer.Such as every the first preset time failure count
Device subtracts 1 automatically, by setting subtracting certainly for failure counter, part interference can be eliminated, equivalent to filter action.
In whole pre-charge process, whether the count value of real-time judge failure counter is more than preset failure value, when sentencing
When disconnected result is no, control pre-charge circuit continues to be pre-charged, and when judged result is to be, judges pre-charge circuit now
Break down, control pre-charge circuit terminates to be pre-charged.
The present embodiment is in pre-charge process, by judging while voltage difference and charging current, relative to existing skill
In art, by detecting busbar voltage or delay a period of time attracting electric relay, it can effectively judge whether pre-charge process is complete
Into, and can solve the problem that because of the frequent adhesive of relay that only detection busbar voltage or delay a period of time bring with regard to attracting electric relay
Problem, extend the service life of relay.Meanwhile when whether the voltage difference for judging relay is more than voltage preset value, preliminary filling
Whether the charging current of circuit is more than electric current preset value, in the two conditions the judged result of only one of which for when being,
Increase the counting of failure counter, after failure counter reaches the first preset time, reduce the counting of failure counter,
In whole pre-charge process, by the count value of real-time failure judgement counter, it can interpolate that out pre-charge circuit in preliminary filling
Whether broken down in electric process.
As shown in figure 5, be a kind of charge control method of pre-charge circuit disclosed in another embodiment of the present invention, including：
S501, be pre-charged start when, be provided for judging pre-charge circuit whether the counting of the failure counter of failure
Started counting up after clearing；
S502, in pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay electricity
Pressure difference；
S503, judge whether precharge time is less than the second preset time, if then entering step S504, if otherwise entering
Step S508:
S504, judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is less than
Electric current preset value, if then entering step S505, if otherwise entering step S506：
S505, precharge are completed；
S506, judge whether the voltage difference of relay is more than the voltage preset value, and whether charging current is more than described
Electric current preset value, if then entering step S507, if otherwise entering step S508：
S507, continue to be pre-charged；
S508, failure counter counting plus N are set, wherein N is positive integer；
S509, the failure counter is set to subtract M after the first preset time is reached, wherein M is positive integer；
S510, judge whether the count value of the failure counter is more than preset failure value, if it is not, then entering step
S507, if then entering step S511：
S511, judge pre-charge circuit failure, terminate precharge.
Specifically, the operation principle of above-described embodiment is：When being pre-charged beginning, will be used for whether judging pre-charge circuit
The counting of the failure counter of failure starts counting up after resetting.
In pre-charge process, the voltage of the relay by constantly detecting former and later two times in sampling time, get
The voltage difference of relay within the sampling time, while the electric current of pre-charge circuit is flowed through in detection in real time, gets pre-charge circuit
Charging current.
In whole pre-charge process, judge whether the time of precharge is less than the second preset time in real time, if judging
As a result it is no, i.e., when the time being pre-charged in whole pre-charge process is more than the second preset time, then failure counter is set
Count and add N, wherein N is positive integer, for example, 1；Meanwhile in whole pre-charge process, the voltage of relay is judged in real time
Whether difference is less than voltage preset value, wherein, voltage preset value is the preset value pre-set according to different relays, generally
1V-5V；Judge whether charging current is less than electric current preset value simultaneously, wherein, electric current preset value is pre- according to different relays
The preset value first set, generally 0-0.5A.
When whether the voltage difference for judging relay is less than voltage preset value, and judge whether charging current is preset less than electric current
The result of value is when being, then judges that the pre-charge circuit has completed pre-charge process.
When whether the voltage difference for judging relay is more than voltage preset value, and whether the charging current of pre-charge circuit is more than
The result of electric current preset value is when being, control pre-charge circuit continues to be pre-charged.
When whether the voltage difference for judging relay is more than voltage preset value, and whether the charging current of pre-charge circuit is more than
The result of electric current preset value for it is no when, i.e., when whether the voltage difference for judging relay is more than voltage preset value, pre-charge circuit
Whether charging current is more than electric current preset value, and the judged result of only one of which is when being, sets failure in the two conditions
Rolling counters forward adds N, wherein N to be positive integer, for example, 1；In whole pre-charge process, when failure counter reaches first
After preset time, set failure counter to count and subtract M, wherein M is positive integer.Such as every the first preset time failure counter
Automatically subtract 1, by setting subtracting certainly for failure counter, part interference can be eliminated, equivalent to filter action.
In whole pre-charge process, whether the count value of real-time judge failure counter is more than preset failure value, when sentencing
When disconnected result is no, control pre-charge circuit continues to be pre-charged, and when judged result is to be, judges pre-charge circuit now
Break down, control pre-charge circuit terminates to be pre-charged.
The present embodiment is in pre-charge process, by judging while voltage difference and charging current, relative to existing skill
In art, by detecting busbar voltage or delay a period of time attracting electric relay, it can effectively judge whether pre-charge process is complete
Into, and can solve the problem that because of the frequent adhesive of relay that only detection busbar voltage or delay a period of time bring with regard to attracting electric relay
Problem, extend the service life of relay.
Meanwhile when the time being pre-charged in whole pre-charge process being more than the second preset time, increase failure count
The counting of device；When whether the voltage difference for judging relay is more than voltage preset value, whether the charging current of pre-charge circuit is more than
Electric current preset value, the judged result of only one of which is when being, increases the counting of failure counter in the two conditions；When event
Hinder counter after the first preset time is reached, reduce the counting of failure counter, in whole pre-charge process, by real-time
Failure judgement counter count value, can interpolate that out whether pre-charge circuit breaks down in pre-charge process.
If the function described in the present embodiment method is realized in the form of SFU software functional unit and is used as independent product pin
Sell or in use, can be stored in a computing device read/write memory medium.Based on such understanding, the embodiment of the present invention
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, and this is soft
Part product is stored in a storage medium, including some instructions to cause a computing device (can be personal computer,
Server, mobile computing device or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention
Suddenly.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), deposit at random
Access to memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
- A kind of 1. charge control method of pre-charge circuit, it is characterised in that including：In pre-charge process, obtain the charging current of pre-charge circuit and within the sampling time relay voltage difference；Judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is preset less than electric current Value, if judging, the voltage difference of the relay is less than voltage preset value, and the charging current is less than electric current preset value then：Precharge is completed.
- 2. according to the method for claim 1, it is characterised in that if whether the voltage difference for judging the relay is less than Voltage preset value, and the charging current whether be less than electric current preset value result be it is no, then：Judge whether the voltage difference of the relay is more than the voltage preset value, and whether the charging current is more than the electricity Preset value is flowed, the voltage difference of the relay is more than the voltage preset value if judging, and the charging current is more than the electricity Flow preset value then：Continue to be pre-charged.
- 3. according to the method for claim 2, it is characterised in that it is described in pre-charge process, obtain pre-charge circuit Charging current and also include before the voltage difference of relay within the sampling time：Be pre-charged start when, be provided for judging whether pre-charge circuit starts after the counting clearing of the failure counter of failure Count；The voltage difference for judging the relay is more than the voltage preset value, and the charging current is pre- more than the electric current If after the result of value, in addition to：Judge whether the count value of the failure counter is more than preset failure value, if judging the count value of the failure counter Less than or equal to preset failure value, then：Continue to be pre-charged.
- 4. according to the method for claim 3, it is characterised in that if the count value for judging the failure counter whether Result more than preset failure value be it is yes, then：Judge pre-charge circuit failure, terminate precharge.
- 5. according to the method for claim 3, it is characterised in that if the voltage difference for judging the relay is more than described Voltage preset value, and the charging current is less than or equal to the electric current preset value；Or judge that the voltage difference of the relay is small In or equal to the voltage preset value, and the charging current is more than the electric current preset value, then：Set failure counter to count and add N, wherein N is positive integer.
- 6. according to the method for claim 3, it is characterised in that set the failure counter reaching the first preset time After subtract M, wherein M is positive integer.
- 7. according to the method for claim 3, it is characterised in that whether the voltage difference for judging the relay is less than electricity Preset value is pressed, and whether the charging current is less than electric current preset value and also includes before：Judge whether precharge time is less than the second preset time, precharge time is more than or equal to the second preset time if judging Then：Set failure counter to count and add N, wherein N is positive integer.
- 8. according to the method for claim 7, it is characterised in that it is described judge precharge time whether be less than second preset when Between, if judging that precharge time is less than the second preset time：Judge whether the voltage difference of the relay is less than voltage preset value, and whether the charging current is preset less than electric current Value.
- 9. according to the method for claim 1, it is characterised in that the voltage preset value is 1V-5V.
- 10. according to the method for claim 1, it is characterised in that the electric current preset value is 0-0.5A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510234294.9A CN104836294B (en) | 2015-05-08 | 2015-05-08 | A kind of charge control method of pre-charge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510234294.9A CN104836294B (en) | 2015-05-08 | 2015-05-08 | A kind of charge control method of pre-charge circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104836294A CN104836294A (en) | 2015-08-12 |
| CN104836294B true CN104836294B (en) | 2018-03-16 |
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| CN106602622B (en) * | 2015-10-15 | 2019-06-18 | 北京宝沃汽车有限公司 | Electric vehicle pre-charging control method and system |
| CN109624788B (en) * | 2018-12-28 | 2021-04-16 | 蜂巢能源科技有限公司 | Power battery pre-charging state judgment system and judgment method |
| CN114295974B (en) * | 2021-12-30 | 2023-11-10 | 上海儒竞智控技术有限公司 | Method and circuit for detecting failure of precharge relay |
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| CN103683888A (en) * | 2012-09-20 | 2014-03-26 | 施耐德东芝换流器欧洲公司 | Safety control method of system having precharging circuit, safety control device of system having precharging circuit, and system with safety control device |
| CN104518547A (en) * | 2013-09-26 | 2015-04-15 | 福特全球技术公司 | Bus pre-charge control using buck converter |
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| JP2004120866A (en) * | 2002-09-25 | 2004-04-15 | Mitsubishi Fuso Truck & Bus Corp | Power controller of electric automobile |
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| CN103683888A (en) * | 2012-09-20 | 2014-03-26 | 施耐德东芝换流器欧洲公司 | Safety control method of system having precharging circuit, safety control device of system having precharging circuit, and system with safety control device |
| CN104518547A (en) * | 2013-09-26 | 2015-04-15 | 福特全球技术公司 | Bus pre-charge control using buck converter |
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