CN113030719A - Method and device for determining the remaining switched-off life of a relay - Google Patents
Method and device for determining the remaining switched-off life of a relay Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
The disclosure relates to a method and a device for determining the residual cut-off life of a relay, which aim to solve the problem that the prior art can not accurately calculate the residual cut-off life of the relay which is cut off under different currents, and the method comprises the following steps: acquiring a cut-off current of the relay when the equipment is powered off in a case where the relay is used in the equipment having a power supply; determining a target calibration current value according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance; determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a preset corresponding relation between the plurality of calibration current values and the counting ratio; and subtracting the target counting rate from the determined residual cut-off life of the relay when the equipment is powered off last time to obtain the residual cut-off life of the relay after the equipment is powered off this time.
Description
Technical Field
The present disclosure relates to the field of relays, and in particular, to a method and apparatus for determining a remaining cutoff life of a relay.
Background
As an important electrical component in a battery pack, a relay is particularly important for rational use and for understanding of the cut-off life thereof. Currently, the evaluation of the relay cut-off life count is basically based on a single life test of the relay under different currents, for example, the cut-off life of a relay of a certain specification is 100000 times under a current of 10A, 20000 times under a current of 20A, 1000 times under a current of 250A, and 1 time under a current of 2000A; when counting life evaluation is carried out, 10A, 20A, 250A and 2000A are respectively set during setting, when a certain life reaches an early warning value, namely 100000 times under the current of 10A or 20000 times under the current of 20A, early warning is carried out, and a user is prompted to carry out maintenance and replacement. However, in the actual use process, the relay is switched off under different currents, and the counting strategy of a single current cannot accurately count the cut-off service life, so that normal early warning cannot be realized, and the risk of faults caused by the relay is increased.
Disclosure of Invention
An object of the present disclosure is to provide a method and apparatus for determining a remaining cut-off life of a relay, so as to solve the above technical problems in the related art.
To achieve the above object, a first aspect of the present disclosure provides a method for determining a remaining cut-off life of a relay, including:
acquiring a cut-off current of the relay when the equipment is powered off in a case where the relay is used in the equipment having a power supply;
determining a target calibration current value according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance;
determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a preset corresponding relation between the plurality of calibration current values and the counting ratio;
and subtracting the target counting rate from the determined residual cut-off life of the relay when the equipment is powered off last time to obtain the residual cut-off life of the relay after the equipment is powered off this time.
Optionally, the plurality of calibration current values includes at least two of the following plurality of current values:
an initial current;
a first cutoff current of the relay when the equipment is powered off in a case where electrical parts of the equipment are all turned off;
a second cutoff current of the relay when the appliance is powered down in a case where the electrical part of the appliance is partially turned off;
rated current of the relay;
a first intermediate current value between the second cutoff current and a rated current of the relay;
peak current of the relay;
a second intermediate current value between the rated current of the relay and the peak current of the relay;
the third cut-off current of the relay is obtained when the current is collected under the maximum measuring range;
the current corresponding to the maximum breaking capacity of the relay.
Optionally, the determining of the corresponding relationship includes:
according to each calibration current value, testing the cut-off life of the relay respectively to obtain the cut-off life times corresponding to each calibration current value;
and determining a counting ratio corresponding to each calibration current value according to the distribution of the cut-off life times, wherein the counting ratio is inversely related to the cut-off life times.
Optionally, the determining a target calibration current value according to a magnitude relationship between the cut-off current and a plurality of calibration current values calibrated in advance includes:
and taking the minimum calibrated current value in the calibrated current values larger than the cut-off current as the target calibrated current value.
Optionally, the method further comprises:
and after the residual cut-off life of the relay after the power-off of the equipment is obtained, if the residual cut-off life of the equipment after the power-off of the equipment is less than a preset threshold value, a relay replacement prompt is generated.
The second aspect of the present disclosure also provides an apparatus for determining a remaining cut-off life of a relay, the apparatus comprising:
an acquisition module configured to acquire a cut-off current of the relay when the apparatus is powered off, in a case where the relay is used in the apparatus having a power supply;
the first determining module is used for determining a target calibration current value according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance;
the second determining module is used for determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a preset corresponding relation between the plurality of calibration current values and the counting ratio;
and the calculation module is used for subtracting the target counting ratio from the residual cut-off service life of the relay determined when the equipment is powered off last time to obtain the residual cut-off service life of the relay after the equipment is powered off this time.
Optionally, the apparatus further comprises:
and the early warning module is used for generating a relay replacement prompt if the residual cut-off life of the relay after the power-off of the equipment is less than a preset threshold value after the residual cut-off life of the relay after the power-off of the equipment is obtained.
The third aspect of the present disclosure also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of any one of the first aspects described above.
A fourth aspect of the present disclosure also provides an electronic device, including:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of any of the first aspects above.
Through the technical scheme, the following technical effects can be at least achieved:
when the relay is used in equipment with a power supply, the cut-off current of the relay is obtained when the equipment is powered off, a target calibration current value is determined according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance, a target counting ratio corresponding to the target calibration current value is determined according to the target calibration current value and the preset corresponding relation between the plurality of calibration current values and the counting ratio, and finally the residual cut-off life of the relay determined when the equipment is powered off last time is subtracted from the target counting ratio to obtain the residual cut-off life of the relay after the equipment is powered off this time. Therefore, the residual cut-off service life of the relay cut-off under different currents can be accurately calculated, and the problem that the residual cut-off service life of the relay cannot be accurately calculated by a counting strategy of single current is solved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic flow chart diagram of a method for determining the remaining cut-off life of a relay provided by an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart diagram of another method for determining the remaining cutoff life of a relay provided by an embodiment of the present disclosure;
FIG. 3 is a block diagram of an apparatus for determining the remaining cutoff life of a relay provided by an embodiment of the present disclosure;
fig. 4 is a block diagram of an electronic device provided by an embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect. The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.
It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units. It is noted that references to "a", "an", and "the" modifications in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that "one or more" may be used unless the context clearly dictates otherwise.
The current counting evaluation of the relay cut-off service life is basically based on single service life test of the relay under different currents, and when a certain service life reaches an early warning value, early warning is carried out, and a user is prompted to carry out maintenance and replacement. However, in a real use environment, the relay is cut off under different currents, for example, the cut-off life of a relay of a certain specification under a current of 10A is 100000 times, the relay is cut off 500 times under a current of 250A, and cut off 60000 times under a current of 10A, at this time, because the states of the relay are overlapped, the remaining life requirement cannot be met under the state of 10A current cut-off, that is, there is a risk in use, the remaining cut-off life of the relay cannot be accurately calculated by the existing counting strategy, so that a normal early warning cannot be realized, and the risk that the equipment fails due to the relay is increased.
In view of the above, the present disclosure provides a method and an apparatus for determining a remaining cut-off life of a relay to solve the above technical problems.
The disclosed embodiment provides a method for determining the remaining cut-off life of a relay, as shown in fig. 1, the method comprising:
s101, obtaining cut-off current of the relay when the equipment is powered off under the condition that the relay is used in the equipment with the power supply.
S102, determining a target calibration current value according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance.
S103, determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a preset corresponding relation between the plurality of calibration current values and the counting ratio.
And S104, subtracting the target counting ratio according to the residual cut-off life of the relay determined when the equipment is powered off last time, and obtaining the residual cut-off life of the relay after the equipment is powered off this time.
By adopting the method, the residual cut-off service life of the relay after the power-off of the equipment at this time is obtained by obtaining the cut-off current of the relay when the equipment is powered off, determining a target calibration current value according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance, determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a plurality of preset corresponding relations between the calibration current values and the counting ratio, and finally subtracting the target counting ratio from the residual cut-off service life of the relay determined when the equipment is powered off last time. Therefore, the residual cut-off service life of the relay cut-off under different currents can be accurately calculated, and the problem that the residual cut-off service life of the relay cannot be accurately calculated by a counting strategy of single current is solved.
In one possible implementation manner, the plurality of calibration currents are obtained by calibrating the relays with the same specification, and include at least two current values of the following plurality of current values: initial current I0A first cut-off current I of the relay when the equipment is powered off under the condition that the electrical parts of the equipment are all closed1A second cut-off current I of the relay when the equipment is powered down in the case of partial closing of the electrical components of the equipment2Rated current I of relay4A first intermediate current value I between the second cut-off current and the rated current of the relay3Peak current of relay6A second intermediate current value I between the rated current of the relay and the peak current of the relay5And the third cut-off current I of the relay when the relay is electrified under the maximum current collection range7And the current I corresponding to the maximum breaking capacity of the relay8。
In an example, a voltage platform of a certain device is assumed to be 450V, when all electrical parts are powered off, the current is about 5A, the rated current is 250A, the peak current is 600A, the maximum current collection range is 1200A, and the limit breaking of the relay is 2000A. Now the initial current I0The setting is 10A, and other current values are divided as shown in Table 1, wherein, in order to avoid additional reduction of the remaining cut-off life due to current floating during normal power-off, the first cut-off current I is set1Set to be consistent with the initial current value, and in addition, in order to make the calculation result more accurate, the second cut-off current I when the electric part is partially powered off is increased2And a first intermediate current value I3And a second intermediate current value I5. TABLE 1
In a possible implementation manner, the determining of the preset corresponding relationship between the plurality of calibration current values and the counting ratio in step S103 may include:
and respectively testing the cut-off service life of the relay according to each calibration current value to obtain the cut-off service life times corresponding to each calibration current value. And determining a counting ratio corresponding to each calibration current value according to the distribution of the cut-off life times, wherein the counting ratio is inversely related to the cut-off life times.
It should be noted that, for relays of different specifications, the service lives of the relays may differ, and when the relay counting strategy is set, the relays of different specifications need to be set according to the actual capabilities of the relays, that is, multiple groups of samples are selected to test the service lives of the relays during actual measurement, and the service lives of the relays need to be limited, and the times of the service lives of the relays are confirmed by using a statistical method. In addition, in the embodiment, the cut-off life of the relays with different specifications is based on the measured values of a plurality of groups of samples, so that the finally obtained cut-off life times of the relays are closest to the real performance of the product.
Illustratively, taking a 250A current level relay as an example, the relay has a test result of the cut-off life times under a voltage of 450V and an initial current I0Count ratio R of the number of times of corresponding cutoff lives to the number of times of cutoff lives corresponding to other current valuesXAs shown in table 2 below. As can be seen from table 2, the larger the cutoff current value, the smaller the number of times of cutoff life corresponding to the relay, and the larger the corresponding count rate, that is, the count rate is inversely related to the number of times of cutoff life. TABLE 2
In a possible implementation manner, a target calibration current value is determined according to a magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance, and a minimum calibration current value in the calibration current values larger than the cut-off current is taken as the target calibration current value.
For example, assuming that a certain device is powered off during use, the current value K collected before power off is 18A, and the judgment of the K value is 10A<K<20A, the target calibration current value corresponding to the current value K is I2=20A。
For example, from the data in Table 2 above, the target calibration current value may be determined to be I2Corresponding count ratio R2If the remaining cut-off life of the relay determined when the device was last powered off is L =89551 times, the remaining cut-off life of the relay after the device was powered off can be calculated by the following formula:
wherein L isRThe residual cut-off service life of the relay after the power-off of the equipment is shown, and 89549.57 times of residual cut-off service life of the relay after the power-off of the equipment is obtained through calculation.
At one endIn a possible implementation manner, this embodiment further includes: and after the residual cut-off life of the relay after the power-off of the equipment is obtained, if the residual cut-off life of the equipment after the power-off of the equipment is less than a preset threshold value, a relay replacement prompt is generated. Wherein the threshold value can be set as the initial current I in the above example0The number of corresponding cutoff lives is 5%, which the present disclosure does not specifically limit. Therefore, the equipment user can be reminded to maintain and replace before the relay fails, and the risk of equipment failure caused by the relay is reduced.
In order to make the method provided by the embodiment of the present disclosure more easily understood by those skilled in the art, the steps of the method for determining the remaining cut-off life of the relay provided by the embodiment of the present disclosure are described in detail. As shown in fig. 2, the method includes:
s201, selecting a plurality of groups of samples for relays with different specifications to perform the cut-off life test of the relays.
S202, determining the number of times of the service life of each relay with the same voltage and different calibration currents.
S203, according to the distribution of the cut-off life times, determining a counting ratio corresponding to each calibration current value, and storing the corresponding relation between the calibration current values and the counting ratios through a counting ratio relation table.
And S204, obtaining the cut-off current value of the relay when the equipment is powered off.
S205, determining a target calibration current value according to the magnitude relation between the cut-off current value and the calibration current values.
S206, determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and the counting ratio relation table.
And S207, subtracting the target counting ratio according to the residual cut-off life of the relay determined when the equipment is powered off last time, and obtaining the residual cut-off life of the relay after the equipment is powered off this time.
And S208, generating a relay replacement prompt under the condition that the residual cut-off service life of the relay after the power-off of the equipment is less than a preset threshold value.
By adopting the method, the cutting-off service life data obtained by testing a plurality of groups of samples for the relays with different specifications are closest to the real performance of the product, and the counting ratio table obtained based on the cutting-off service life data also has accuracy. Determining a target calibration current value according to the obtained cutting-off current of the relay when the equipment is powered off, obtaining a target counting ratio according to the counting ratio table, and finally subtracting the target counting ratio from the residual cutting-off service life of the relay determined when the equipment is powered off last time to obtain the residual cutting-off service life of the relay after the equipment is powered off this time. Therefore, the residual cut-off service life of the relay cut-off under different currents can be accurately calculated, and the problem that the residual cut-off service life of the relay cannot be accurately calculated by a counting strategy of single current is solved. In addition, the relay is generated to be changed under the condition that the residual cut-off service life of the relay after the power-off of the equipment is smaller than the preset threshold value, the equipment user can be reminded to maintain and change before the relay fails, and the risk that the equipment breaks down due to the relay is reduced.
Fig. 3 is a block diagram illustrating an apparatus 300 for determining the remaining cutoff life of a relay according to an exemplary embodiment. As shown in fig. 3, the apparatus 300 includes:
an obtaining module 301, configured to obtain, when the relay is used in a device having a power supply, a cut-off current of the relay when the device is powered off.
The first determining module 302 is configured to determine a target calibration current value according to a magnitude relationship between the cut-off current and a plurality of calibration current values calibrated in advance.
The second determining module 303 is configured to determine a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a preset corresponding relationship between the plurality of calibration current values and the counting ratio.
And the calculating module 304 is configured to subtract the target counting ratio from the remaining cut-off life of the relay determined when the device is powered off last time, so as to obtain the remaining cut-off life of the relay after the device is powered off this time.
By adopting the device, a target calibration current value is determined according to the magnitude relation between the cut-off current of the relay and a plurality of calibration current values calibrated in advance when the equipment is powered off, a target counting ratio corresponding to the target calibration current value is determined according to the target calibration current value and the preset corresponding relation between the plurality of calibration current values and the counting ratio, and finally the residual cut-off life of the relay after the equipment is powered off is obtained by subtracting the target counting ratio from the residual cut-off life of the relay determined when the equipment is powered off last time. Therefore, the residual cut-off service life of the relay cut-off under different currents can be accurately calculated, and the problem that the residual cut-off service life of the relay cannot be accurately calculated by a counting strategy of single current is solved.
Optionally, the first determining module 302 is configured to:
and taking the minimum calibrated current value in the calibrated current values larger than the cut-off current as the target calibrated current value.
Optionally, the plurality of calibration current values includes at least two of the following plurality of current values:
an initial current;
a first cutoff current of the relay when the equipment is powered off in a case where electrical parts of the equipment are all turned off;
a second cutoff current of the relay when the appliance is powered down in a case where the electrical part of the appliance is partially turned off;
rated current of the relay;
a first intermediate current value between the second cutoff current and a rated current of the relay;
peak current of the relay;
a second intermediate current value between the rated current of the relay and the peak current of the relay;
the third cut-off current of the relay is obtained when the current is collected under the maximum measuring range;
the current corresponding to the maximum breaking capacity of the relay.
Optionally, the determining of the corresponding relationship includes:
according to each calibration current value, testing the cut-off life of the relay respectively to obtain the cut-off life times corresponding to each calibration current value;
and determining a counting ratio corresponding to each calibration current value according to the distribution of the cut-off life times, wherein the counting ratio is inversely related to the cut-off life times.
Optionally, the apparatus 300 further comprises:
and the early warning module is used for generating a relay replacement prompt if the residual cut-off life of the relay after the power-off of the equipment is less than a preset threshold value after the residual cut-off life of the relay after the power-off of the equipment is obtained.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The disclosed embodiments also provide a non-transitory computer readable storage medium having stored thereon a computer program that, when executed by a processor, performs the steps of the method for determining a remaining cut-off life of a relay provided by the above-described method embodiments.
The disclosed embodiment also provides an electronic device 400, including:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method for determining the remaining cut-off life of a relay provided by the above method embodiments.
Fig. 4 is a block diagram illustrating an electronic device 400 according to an example embodiment. For example, the electronic device 400 may be provided as a server. Referring to fig. 4, the electronic device 400 comprises a processor 422, which may be one or more in number, and a memory 432 for storing computer programs executable by the processor 422. The computer program stored in memory 432 may include one or more modules that each correspond to a set of instructions. Further, the processor 422 may be configured to execute the computer program to perform the above-described method for determining the remaining cut-off life of the relay.
Additionally, electronic device 400 may also include a power component 426 and a communication component 450, the power component 426 may be configured to perform power management of the electronic device, and the communication component 450 may be configured to enable communication, e.g., wired or wireless communication, of the electronic device 400. The electronic device 400 may also include input/output (I/O) interfaces 458. The electronic device 400 may operate based on an operating system, such as Windows Server, stored in the memory 432TM，Mac OS XTM，UnixTM，LinuxTMAnd so on.
In another exemplary embodiment, a non-transitory computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the above method for determining the remaining cut-off life of a relay is also provided. For example, the non-transitory computer readable storage medium may be the memory 432 described above including program instructions executable by the processor 422 of the electronic device 400 to perform the method described above for determining the remaining cutoff life of a relay.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (9)
1. A method for determining a remaining cut-off life of a relay, the method comprising:
acquiring a cut-off current of the relay when the equipment is powered off in a case where the relay is used in the equipment having a power supply;
determining a target calibration current value according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance;
determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a preset corresponding relation between the plurality of calibration current values and the counting ratio;
and subtracting the target counting rate from the determined residual cut-off life of the relay when the equipment is powered off last time to obtain the residual cut-off life of the relay after the equipment is powered off this time.
2. The method of claim 1, wherein the plurality of calibration current values comprises at least two of the following plurality of current values:
an initial current;
a first cutoff current of the relay when the equipment is powered off in a case where electrical parts of the equipment are all turned off;
a second cutoff current of the relay when the appliance is powered down in a case where the electrical part of the appliance is partially turned off;
rated current of the relay;
a first intermediate current value between the second cutoff current and a rated current of the relay;
peak current of the relay;
a second intermediate current value between the rated current of the relay and the peak current of the relay;
the third cut-off current of the relay is obtained when the current is collected under the maximum measuring range;
the current corresponding to the maximum breaking capacity of the relay.
3. The method of claim 1, wherein the determining of the correspondence comprises:
according to each calibration current value, testing the cut-off life of the relay respectively to obtain the cut-off life times corresponding to each calibration current value;
and determining a counting ratio corresponding to each calibration current value according to the distribution of the cut-off life times, wherein the counting ratio is inversely related to the cut-off life times.
4. The method according to any one of claims 1-3, wherein determining a target calibration current value according to a magnitude relationship between the cut-off current and a plurality of calibration current values calibrated in advance comprises:
and taking the minimum calibrated current value in the calibrated current values larger than the cut-off current as the target calibrated current value.
5. The method according to any one of claims 1-3, further comprising:
and after the residual cut-off life of the relay after the power-off of the equipment is obtained, if the residual cut-off life of the equipment after the power-off of the equipment is less than a preset threshold value, a relay replacement prompt is generated.
6. An apparatus for determining a remaining cut-off life of a relay, the apparatus comprising:
an acquisition module configured to acquire a cut-off current of the relay when the apparatus is powered off, in a case where the relay is used in the apparatus having a power supply;
the first determining module is used for determining a target calibration current value according to the magnitude relation between the cut-off current and a plurality of calibration current values calibrated in advance;
the second determining module is used for determining a target counting ratio corresponding to the target calibration current value according to the target calibration current value and a preset corresponding relation between the plurality of calibration current values and the counting ratio;
and the calculation module is used for subtracting the target counting ratio from the residual cut-off service life of the relay determined when the equipment is powered off last time to obtain the residual cut-off service life of the relay after the equipment is powered off this time.
7. The apparatus of claim 6, further comprising:
and the early warning module is used for generating a relay replacement prompt if the residual cut-off life of the relay after the power-off of the equipment is less than a preset threshold value after the residual cut-off life of the relay after the power-off of the equipment is obtained.
8. A non-transitory computer readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
9. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 5.
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| CN103412254A (en) * | 2013-07-10 | 2013-11-27 | 北京中瑞蓝科电动汽车技术有限公司 | Method for acquiring DC contactor equivalent service life of electric vehicle and device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412254A (en) * | 2013-07-10 | 2013-11-27 | 北京中瑞蓝科电动汽车技术有限公司 | Method for acquiring DC contactor equivalent service life of electric vehicle and device thereof |
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