CN108377012A - A kind of charge protection method, device and control device - Google Patents
A kind of charge protection method, device and control device Download PDFInfo
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- CN108377012A CN108377012A CN201810161385.8A CN201810161385A CN108377012A CN 108377012 A CN108377012 A CN 108377012A CN 201810161385 A CN201810161385 A CN 201810161385A CN 108377012 A CN108377012 A CN 108377012A
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- 238000004590 computer program Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
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Abstract
The present invention provides a kind of charge protection method, device and control devices, are applied to DC-DC converter, which includes：When obtaining the DC-DC converter and being charged, the charging current and ground voltage of the DC-DC converter；According to the ground voltage and the charging current, controls the DC-DC converter and charge.The embodiment of the present invention obtains the charging current and ground voltage of DC-DC converter, and it flexibly controls DC-DC converter according to ground voltage and charging current and charges, it avoids in charging process, charging current flows back to the cathode of DC-DC converter from the electrical appliance on total ground.
Description
Technical field
The present invention relates to field of DC/DC conversion, more particularly to a kind of charge protection method, device and control device.
Background technology
Constantly deteriorate as traditional energy is on the verge of exhausted and environmental pollution, in recent years, new-energy automobile has begun greatly
Amount puts goods on the market in application, its complete replacing fuel oil automobile has pointed the day and await for it, and people also propose higher to new-energy automobile
Performance requirement and reliability requirement.
DC-DC converter charges as new-energy automobile low tension battery and provides low tension to vehicle electrical appliance
Component, performance quality directly affects vehicle performance and reliability.
Since manufacture level and assembly technology are limited, DC-DC converter negative line is it sometimes appear that poor contact
Phenomenon, for new-energy automobile in charging process, charging current is back to DC-DC converter from the electrical appliance circuit board on total ground
Cathode, burnt so as to cause electrical appliance circuit board, or even cause serious consequence to lose control of one's vehicle.
Invention content
The present invention provides a kind of charge protection method, device and control devices, to solve the electricity that charges in the prior art
The problem of flowing the cathode for flowing back to DC-DC converter from the electrical appliance on total ground, electrical appliance caused to burn.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
One side according to the present invention provides a kind of charge protection method, is applied to DC-DC converter, institute
The method of stating includes：
When obtaining the DC-DC converter and being charged, the charging current of the DC-DC converter and ground connection
Voltage；
According to the ground voltage and the charging current, controls the DC-DC converter and charge.
Further, described according to the ground voltage and the charging current, control the DC-DC converter
The step of being charged include：
The ground voltage is compared with predetermined voltage threshold, obtains the first comparison result, and by the charging
Electric current is compared with multiple current thresholds, obtains the second comparison result；
According to first comparison result and second comparison result, controls the DC-DC converter and filled
Electricity.
Further, described according to first comparison result and second comparison result, control the DC/DC
The step of converter is charged include：
In first comparison result, the ground voltage is more than the predetermined voltage threshold；Described second compares knot
In fruit, the charging current be more than or equal to the first current threshold, and less than or equal to the second current threshold when, close
The DC-DC converter；
In first comparison result, the ground voltage is more than the predetermined voltage threshold；Described second compares knot
In fruit, the charging current is more than second current threshold, and when less than or equal to third current threshold, turns down described
Charging current.
Further, after described the step of turning down the charging current, further include：
The ground voltage is obtained again, if being turned down to before second current threshold in the charging current, again
The ground voltage obtained is equal to or less than the predetermined voltage threshold, then stops turning down the charging current.
Further, after the step of charging current is turned down in the stopping, further include：
Charging current when stopping turning down the charging current is compared with the 4th current threshold, the described 4th
Current threshold is more than second current threshold, and the 4th current threshold is less than the third current threshold；
When the charging current is more than four current threshold, the number of charging current when stopping turning down is preserved
Value, the charging current stop ground voltage when turning down numerical value and the charging current when stopping turning down when
It carves；
When the charging current is less than or equal to four current threshold, Trouble Report is generated and sent.
Further, first current threshold is equal to the predetermined voltage threshold divided by 5 quotient.
Further, the third current threshold is equal to the predetermined voltage threshold divided by 0.5 quotient.
Another aspect according to the present invention provides a kind of charge protection device, is applied to DC-DC converter,
Described device includes：
First acquisition module, when being charged for obtaining the DC-DC converter, the DC/DC conversion
The charging current and ground voltage of device；
Protection module, for according to the ground voltage and the charging current, controlling the DC-DC converter
It charges.
Further, the protection module includes：
Comparing unit, for the ground voltage to be compared with predetermined voltage threshold, the first comparison result of acquisition, with
And be compared the charging current with multiple current thresholds, obtain the second comparison result；
Processing unit, for according to first comparison result and second comparison result, controlling the DC/DC
Converter charges.
Further, the processing unit includes：
First processing subelement, in first comparison result, the ground voltage to be more than the predeterminated voltage
Threshold value；In second comparison result, the charging current is more than or equal to the first current threshold, and is less than or equal to
When the second current threshold, the DC-DC converter is closed；
Second processing subelement, in first comparison result, the ground voltage to be more than the predeterminated voltage
Threshold value；In second comparison result, the charging current is more than second current threshold, and is less than or equal to third
When current threshold, the charging current is turned down.
Further, further include：
Second acquisition module, for obtaining the ground connection electricity again after described the step of turning down the charging current
Pressure, if being turned down to before second current threshold in the charging current, the ground voltage obtained again be equal to or
Less than the predetermined voltage threshold, then stop turning down the charging current.
Further, further include：
Malfunctioning module turns down the charging electricity for will stop after the step of charging current is turned down in the stopping
Charging current when stream is compared with the 4th current threshold, and the 4th current threshold is more than second current threshold
Value, and the 4th current threshold is less than the third current threshold；When the charging current is more than the 4th current threshold
When value, the numerical value for stopping charging current when turning down, the ground voltage when charging current stops turning down are preserved
Numerical value and the charging current stopping when turning down at the time of；When the charging current is less than or equal to the 4th electric current
When threshold value, Trouble Report is generated and sent.
Another aspect according to the present invention provides a kind of control device, including：It memory, processor and is stored in
On memory and the computer program that can run on a processor, realized such as when the computer program is executed by the processor
Above the step of charge protection method.
Another aspect according to the present invention, provides a kind of computer readable storage medium, described computer-readable to deposit
Computer program is stored on storage media, the computer program realizes charge protection side as described above when being executed by processor
The step of method.
The beneficial effects of the invention are as follows：
Above-mentioned technical proposal, when being charged by obtaining DC-DC converter, the charging of DC-DC converter
Electric current and ground voltage；Using the ground voltage of acquisition and charging current as control DC-DC converter charge according to
According to during being charged to avoid DC-DC converter, charging current flows back to direct current/straight from the electrical appliance on total ground
The cathode of stream transformer, to realize the protection to electrical appliance.
Description of the drawings
Fig. 1 shows one of charge protection method schematic diagrames provided in an embodiment of the present invention；
Fig. 2 indicates the two of charge protection method schematic diagram provided in an embodiment of the present invention；
Fig. 3 indicates charge protection device schematic diagram provided in an embodiment of the present invention.
Reference sign：
31, the first acquisition module；32, protection module；33, the second acquisition module；34, malfunctioning module.
Specific implementation mode
Exemplary embodiment of the present invention is more fully described below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to be best understood from the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
Completely it is communicated to those skilled in the art.
As shown in Figure 1, an embodiment of the present invention provides a kind of charge protection method, it is applied to DC-DC converter, it should
Charge protection method includes：
S11：When acquisition DC-DC converter is charged, the charging current and ground connection electricity of DC-DC converter
Pressure；
It should be noted that the charging current of DC-DC converter, which can be electric vehicle, passes through DC/DC conversion
When device is charged, the output current of DC-DC converter；The ground voltage of DC-DC converter can be direct current/straight
Voltage between the earth point and ground of stream transformer.
S12：According to ground voltage and charging current, control DC-DC converter charges.
It should be noted that it can adjust filling for DC-DC converter that control DC-DC converter, which carries out charging,
Electricity condition, such as charged state are in off state, and will close DC-DC converter, and charged state is turndown regime, will be adjusted
The charging current of DC-DC converter is turned down.
In the embodiment of the present invention, when being charged by obtaining DC-DC converter, DC-DC converter fills
Electric current and ground voltage；The ground voltage of acquisition and charging current are charged as control DC-DC converter
Foundation, during being charged to avoid DC-DC converter, charging current from it is total ground electrical appliance flow back to direct current/
The cathode of direct current transducer, to realize the protection to electrical appliance.
As shown in Fig. 2, the step 12 of foregoing invention embodiment includes：
Step 21：Ground voltage is compared with predetermined voltage threshold, obtains the first comparison result, and will charging electricity
Stream is compared with multiple current thresholds, obtains the second comparison result；
It should be noted that predetermined voltage threshold can carry out really according to the specification or performance of DC-DC converter
It is fixed.Such as predetermined voltage threshold can be 1.25 millivolts.
Step 22：According to the first comparison result with the second comparison result, controls DC-DC converter and charge.
During ensureing that DC-DC converter is charged, charging current flows back to directly from the electrical appliance on total ground
The cathode of stream/direct current transducer in the embodiment of the present invention, compares knot on the basis of above-mentioned each inventive embodiments according to first
Fruit and the second comparison result, controlling the step of DC-DC converter is charged includes：
In first comparison result, ground voltage is more than predetermined voltage threshold；In second comparison result, charging current is more than
Or be equal to the first current threshold, and less than or equal to the second current threshold when, close DC-DC converter；
In first comparison result, ground voltage is more than predetermined voltage threshold；In second comparison result, charging current is more than
Second current threshold, and less than or equal to third current threshold when, turn down charging current.
It should be noted that the first current threshold is less than the second current threshold, the second current threshold is less than third current threshold
Value, preferably, the first current threshold is equal to predetermined voltage threshold divided by 5 quotient.Third current threshold is equal to predetermined voltage threshold
Divided by 0.5 quotient, such as predetermined voltage threshold is 1.25 millivolts, and the first current threshold is 0.25 ampere, and the second current threshold is
40 amperes, third current threshold is 250 amperes.
In the embodiment of the present invention, if ground voltage is less than predetermined voltage threshold, that is, in the first comparison result, ground connection
Voltage is less than or equal to predetermined voltage threshold, it is believed that the cathode ground connection of DC-DC converter is secured, can't occur
The phenomenon that charging current flows back to the cathode of DC-DC converter from the electrical appliance on total ground, keeps current charge condition, and
Need not other operations be carried out to DC-DC converter again.Certainly in the first comparison result, ground voltage is more than default electricity
Press threshold value；In second comparison result, when charging current is less than the first current threshold, DC-DC converter is closed.
In order to obtain after charging current turns down, the charging situation of DC-DC converter, in above-mentioned each inventive embodiments
On the basis of, in the embodiment of the present invention, after the step of turning down charging current, further include：
Ground voltage is obtained again, if being turned down to before the second current threshold in charging current, the ground connection obtained again is electric
Pressure is equal to or less than predetermined voltage threshold, then stops turning down charging current.
If it should be noted that when charging current is turned down to the second current threshold, the ground voltage obtained again is more than
Predetermined voltage threshold then closes DC-DC converter.
In order to obtain charging situation of the DC-DC converter in each charging process, in above-mentioned each inventive embodiments
On the basis of, in the embodiment of the present invention, after the step of stopping turning down charging current, further include：
Charging current when stopping turning down charging current is compared with the 4th current threshold, the 4th current threshold is more than
Second current threshold, and the 4th current threshold is less than third current threshold；
When charging current is more than four current thresholds, numerical value, the charging current of charging current when stopping turning down are preserved
At the time of when numerical value and the charging current stopping of ground voltage when stopping turning down are turned down；
When charging current is less than or equal to four current thresholds, Trouble Report is generated and sent.
As shown in figure 3, another aspect according to the present invention, provides a kind of charge protection device, it is applied to direct current/straight
Stream transformer, device include：
First acquisition module 31, when being charged for obtaining DC-DC converter, DC-DC converter fills
Electric current and ground voltage；
Protection module 32, for according to ground voltage and charging current, control DC-DC converter to charge.
Protection module 32 includes：Comparing unit obtains first for ground voltage to be compared with predetermined voltage threshold
Comparison result, and charging current is compared with multiple current thresholds, obtain the second comparison result；Processing unit is used for
According to the first comparison result with the second comparison result, controls DC-DC converter and charge.
Processing unit includes：First processing subelement, in the first comparison result, ground voltage to be more than predeterminated voltage
Threshold value；In second comparison result, charging current is more than or equal to the first current threshold, and is less than or equal to the second electric current
When threshold value, DC-DC converter is closed；Second processing subelement, in the first comparison result, ground voltage to be more than pre-
If voltage threshold；In second comparison result, charging current is more than the second current threshold, and is less than or equal to third current threshold
When value, charging current is turned down.
Second acquisition module 33, for obtaining ground voltage again after the step of turning down charging current, if charging
Electric current is turned down to before the second current threshold, and the ground voltage obtained again is equal to or less than predetermined voltage threshold, then stops
Turn down charging current.
Malfunctioning module 34, for the charging when charging current is turned down in stopping after the step of stopping turning down charging current
Electric current is compared with the 4th current threshold, and the 4th current threshold is more than the second current threshold, and the 4th current threshold is less than
Third current threshold；When charging current is more than four current thresholds, numerical value, the charging of charging current when stopping turning down are preserved
At the time of when numerical value and the charging current stopping of ground voltage when electric current stops turning down are turned down；Be less than when charging current or
When equal to four current thresholds, Trouble Report is generated and sent.
In the embodiment of the present invention, when being charged by obtaining DC-DC converter, DC-DC converter fills
Electric current and ground voltage；The ground voltage of acquisition and charging current are charged as control DC-DC converter
Foundation, during being charged to avoid DC-DC converter, charging current from it is total ground electrical appliance flow back to direct current/
The cathode of direct current transducer, to realize the protection to electrical appliance.
Another aspect according to the present invention provides a kind of control device, including：It memory, processor and is stored in
On memory and the computer program that can run on a processor, charging as above is realized when computer program is executed by processor
The step of guard method.
In the embodiment of the present invention, when being charged by obtaining DC-DC converter, DC-DC converter fills
Electric current and ground voltage；The ground voltage of acquisition and charging current are charged as control DC-DC converter
Foundation, during being charged to avoid DC-DC converter, charging current from it is total ground electrical appliance flow back to direct current/
The cathode of direct current transducer, to realize the protection to electrical appliance.
Another aspect according to the present invention provides a kind of computer readable storage medium, computer-readable storage medium
The step of being stored with computer program in matter, charge protection method as above realized when computer program is executed by processor.
In the embodiment of the present invention, when being charged by obtaining DC-DC converter, DC-DC converter fills
Electric current and ground voltage；The ground voltage of acquisition and charging current are charged as control DC-DC converter
Foundation, during being charged to avoid DC-DC converter, charging current from it is total ground electrical appliance flow back to direct current/
The cathode of direct current transducer, to realize the protection to electrical appliance.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also include other elements that are not explicitly listed, or further include for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device including the element.
Claims (14)
1. a kind of charge protection method is applied to DC-DC converter, which is characterized in that the method includes：
When obtaining the DC-DC converter and being charged, the charging current and ground connection electricity of the DC-DC converter
Pressure；
According to the ground voltage and the charging current, controls the DC-DC converter and charge.
2. charge protection method according to claim 1, which is characterized in that described according to the ground voltage and described
Charging current, controlling the step of DC-DC converter is charged includes：
The ground voltage is compared with predetermined voltage threshold, obtains the first comparison result, and by the charging current
It is compared with multiple current thresholds, obtains the second comparison result；
According to first comparison result and second comparison result, controls the DC-DC converter and charge.
3. charge protection method according to claim 2, which is characterized in that described according to first comparison result and institute
The second comparison result is stated, controlling the step of DC-DC converter is charged includes：
In first comparison result, the ground voltage is more than the predetermined voltage threshold；In second comparison result,
The charging current is more than or equal to the first current threshold, and when less than or equal to the second current threshold, described in closing
DC-DC converter；
In first comparison result, the ground voltage is more than the predetermined voltage threshold；In second comparison result,
The charging current be more than second current threshold, and less than or equal to third current threshold when, turn down the charging
Electric current.
4. charge protection method according to claim 3, which is characterized in that in described the step of turning down the charging current
Later, further include：
The ground voltage is obtained again, if being turned down to before second current threshold in the charging current, is obtained again
The ground voltage be equal to or less than the predetermined voltage threshold, then stop turn down the charging current.
5. charge protection method according to claim 4, which is characterized in that turn down the charging current in the stopping
After step, further include：
Charging current when stopping turning down the charging current is compared with the 4th current threshold, the 4th electric current
Threshold value is more than second current threshold, and the 4th current threshold is less than the third current threshold；
When the charging current is more than four current threshold, the numerical value of charging current when preservation stops turning down,
At the time of when the numerical value of the ground voltage when charging current stops turning down and charging current stopping are turned down；
When the charging current is less than or equal to four current threshold, Trouble Report is generated and sent.
6. charge protection method according to claim 3, which is characterized in that first current threshold is equal to described default
Voltage threshold divided by 5 quotient.
7. charge protection method according to claim 3, which is characterized in that the third current threshold is equal to described default
Voltage threshold divided by 0.5 quotient.
8. a kind of charge protection device, it is applied to DC-DC converter, which is characterized in that described device includes：
First acquisition module, when being charged for obtaining the DC-DC converter, the DC-DC converter
Charging current and ground voltage；
Protection module, for according to the ground voltage and the charging current, controlling the DC-DC converter and carrying out
Charging.
9. charge protection device according to claim 8, which is characterized in that the protection module includes：
Comparing unit obtains the first comparison result, and will for the ground voltage to be compared with predetermined voltage threshold
The charging current is compared with multiple current thresholds, obtains the second comparison result；
Processing unit, for according to first comparison result and second comparison result, controlling the DC/DC conversion
Device charges.
10. charge protection device according to claim 9, which is characterized in that the processing unit includes：
First processing subelement, in first comparison result, the ground voltage to be more than the predetermined voltage threshold；
In second comparison result, the charging current is more than or equal to the first current threshold, and is less than or equal to second
When current threshold, the DC-DC converter is closed；
Second processing subelement, in first comparison result, the ground voltage to be more than the predetermined voltage threshold；
In second comparison result, the charging current is more than second current threshold, and is less than or equal to third electric current
When threshold value, the charging current is turned down.
11. charge protection device according to claim 10, which is characterized in that further include：
Second acquisition module, for obtaining the ground voltage again after described the step of turning down the charging current, if
It is turned down to before second current threshold in the charging current, the ground voltage obtained again is equal to or less than institute
Predetermined voltage threshold is stated, then stops turning down the charging current.
12. charge protection device according to claim 11, which is characterized in that further include：
Malfunctioning module, when for after the step of charging current is turned down in the stopping by stopping turning down the charging current
The charging current be compared with the 4th current threshold, the 4th current threshold be more than second current threshold, and
And the 4th current threshold is less than the third current threshold；When the charging current is more than four current threshold,
The numerical value of the ground voltage when numerical value of charging current when preservation stops turning down, the charging current stop turning down
And the charging current stopping when turning down at the time of；When the charging current is less than or equal to the 4th current threshold
When, generate and send Trouble Report.
13. a kind of control device, which is characterized in that including：Memory, processor and storage are on a memory and can be in processor
The computer program of upper operation is realized when the computer program is executed by the processor such as any one of claim 1 to 7
The step of described charge protection method.
14. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program realizes the charge protection method as described in any one of claim 1 to 7 when the computer program is executed by processor
The step of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161385.8A CN108377012B (en) | 2018-02-26 | 2018-02-26 | Charging protection method and device and control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161385.8A CN108377012B (en) | 2018-02-26 | 2018-02-26 | Charging protection method and device and control equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN108377012A true CN108377012A (en) | 2018-08-07 |
| CN108377012B CN108377012B (en) | 2020-12-11 |
Family
ID=63018169
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| CN201810161385.8A Active CN108377012B (en) | 2018-02-26 | 2018-02-26 | Charging protection method and device and control equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202094625U (en) * | 2011-05-18 | 2011-12-28 | 宝钢发展有限公司 | Direct current electric appliance grounding detection and pressure release protective device |
| CN105305809A (en) * | 2014-07-30 | 2016-02-03 | 比亚迪股份有限公司 | DC-DC converter and output compensation method thereof and electric automobile having same |
| CN205986280U (en) * | 2016-05-21 | 2017-02-22 | 赖克泉 | Take generating function's portable power source |
-
2018
- 2018-02-26 CN CN201810161385.8A patent/CN108377012B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202094625U (en) * | 2011-05-18 | 2011-12-28 | 宝钢发展有限公司 | Direct current electric appliance grounding detection and pressure release protective device |
| CN105305809A (en) * | 2014-07-30 | 2016-02-03 | 比亚迪股份有限公司 | DC-DC converter and output compensation method thereof and electric automobile having same |
| CN205986280U (en) * | 2016-05-21 | 2017-02-22 | 赖克泉 | Take generating function's portable power source |
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| Publication number | Publication date |
|---|---|
| CN108377012B (en) | 2020-12-11 |
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