CN112986765A

CN112986765A - Vehicle insulation monitoring method and device

Info

Publication number: CN112986765A
Application number: CN202110196516.8A
Authority: CN
Inventors: 沈强; 柳志民; 刘东秦
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-06-18

Abstract

The disclosure provides a vehicle insulation monitoring method and device. The vehicle insulation monitoring method comprises the steps of obtaining current use parameters and current insulation parameters of a vehicle; determining a target insulation reference model matched with the current use parameter according to the corresponding relation between the historical use parameter and the insulation reference model, wherein the insulation reference model is a model which is obtained according to the historical insulation parameter of the sample vehicle and corresponds to the historical use parameter; and determining the insulation state of the vehicle according to the target insulation reference model and the current insulation parameters.

Description

Vehicle insulation monitoring method and device

Technical Field

The disclosure relates to the field of electric automobiles, in particular to a vehicle insulation monitoring method and device.

Background

With the rapid development of the electric automobile industry, the holding capacity of electric automobiles is higher and higher. The battery system of the electric vehicle belongs to a high-voltage system, and therefore, the requirement on the electrical insulation performance of the electric vehicle is higher than that of the traditional vehicle.

When the high-voltage loop of the electric automobile fails due to the failure of the insulation performance of the high-voltage component, the risk of short circuit of the battery exists, and therefore the safety coefficient of passengers is greatly reduced. Therefore, when the insulation performance of the automobile is degraded, timely providing of early warning becomes an important means for guaranteeing the safety of passengers.

Currently, the electric insulation condition of the electric automobile is mainly judged through the insulation value of the electric automobile. However, the insulation value is greatly affected by external factors, and finally, the electrical insulation condition of the electric automobile still needs to be judged manually.

Disclosure of Invention

The present disclosure is directed to a vehicle insulation monitoring method and apparatus that solves at least one of the above-mentioned problems. The specific scheme is as follows:

according to a specific embodiment of the present disclosure, in a first aspect, the present disclosure provides a vehicle insulation monitoring method, including:

acquiring current use parameters and current insulation parameters of a vehicle;

determining a target insulation reference model matched with the current use parameter according to the corresponding relation between the historical use parameter and the insulation reference model, wherein the insulation reference model is a model which is obtained according to the historical insulation parameter of the sample vehicle and corresponds to the historical use parameter;

and determining the insulation state of the vehicle according to the target insulation reference model and the current insulation parameters.

Optionally, the current usage parameter includes a current driving parameter, the current driving parameter includes a current time parameter and a current mileage parameter, and the insulation reference model includes a first insulation reference model and a second insulation reference model;

the first insulation reference model is a model corresponding to the time parameter obtained according to the historical insulation parameter corresponding to the time parameter of the sample vehicle;

the second insulation reference model is a model corresponding to the mileage parameter, which is obtained according to the historical insulation parameters corresponding to the mileage parameter of the sample vehicle.

Alternatively to this, the first and second parts may,

the step of determining a target insulation reference model matched with the current use parameters according to the corresponding relation between the historical use parameters and the insulation reference model comprises the following steps:

determining a first target insulation reference model corresponding to the current time parameter according to the corresponding relation between the time parameter and the first insulation reference model;

and determining a second target insulation reference model corresponding to the current mileage parameter according to the corresponding relation between the mileage parameter and the second insulation reference model.

Optionally, the current usage parameters further include a current usage state, the historical usage parameters include usage states, the usage states include a parking state, a driving state, and a charging state, the insulation reference model includes a first insulation reference model and a second insulation reference model in different usage states, the first insulation reference model is a model corresponding to different usage states obtained according to a historical insulation parameter of the sample vehicle corresponding to the time parameter, and the second insulation reference model is a model corresponding to different usage states obtained according to a historical insulation parameter of the sample vehicle corresponding to the mileage parameter.

Optionally, the determining, according to the correspondence between the historical usage parameters and the insulation reference model, the target insulation reference model matched with the current usage parameters includes:

determining a first target insulation reference model corresponding to the current time parameter in the first insulation reference model of the current use state; and determining a second target insulation reference model corresponding to the current mileage parameter in the second insulation reference model corresponding to the current use state.

Optionally, the current usage parameters further include current environmental parameters, the historical usage parameters further include environmental parameters, and the insulation reference model includes a first insulation reference model obtained according to different environmental parameters, different usage states, and historical insulation parameters corresponding to the time parameters, and a second insulation reference model obtained according to different environmental parameters, different usage states, and historical insulation parameters corresponding to the mileage parameters.

determining a first target insulation reference model corresponding to the current time parameter, the current environment parameter and the current use state in the first insulation reference model; and determining a second target insulation reference model corresponding to the current mileage parameter and the current environment parameter in the second insulation reference model corresponding to the current use state.

Optionally, before determining the insulation state of the vehicle according to the target insulation reference model and the current insulation parameter, the method further includes:

acquiring a first reference insulation parameter corresponding to the current time parameter by using the first target insulation reference model;

and acquiring a second reference insulation parameter corresponding to the current mileage parameter by using the second target insulation reference model.

Optionally, the determining the insulation state of the vehicle according to the target insulation reference model and the current insulation parameter includes:

if the current insulation parameter is smaller than the current state occupation ratio of the first reference insulation parameter or the current insulation parameter is smaller than the current state occupation ratio of the second reference insulation parameter, executing a first alarm strategy, wherein the first alarm strategy is used for prompting that the insulation state of the vehicle has a degradation trend;

and if the current insulation parameter is smaller than the current state occupation ratio of the first reference insulation parameter and the current insulation parameter is smaller than the current state occupation ratio of the second reference insulation parameter, executing a second alarm strategy, wherein the second alarm strategy is used for prompting that the insulation state of the vehicle has a failure trend.

Optionally:

if the current using state is the parking state, the current state accounts for 90%;

if the current use state is a driving state, the current state accounts for 80%;

and if the current use state is the charging state, the current state ratio is 50%.

Optionally, the method further includes:

if the current use state is a parking state, determining a unit with reduced insulation performance in the vehicle as a high-voltage loop in a battery pack;

if the current use state is a running state, determining that a unit with reduced insulation performance in the vehicle is a high-voltage circuit in a battery pack and/or a driving high-voltage circuit;

and if the current use state is a charging state, determining that the unit with reduced insulation performance in the vehicle is a high-voltage circuit in the battery pack and/or a charging high-voltage circuit.

Optionally, before the obtaining of the current usage parameter and the current insulation parameter of the vehicle, the method further includes:

obtaining historical insulation parameters and historical use parameters of a sample vehicle, wherein the sample vehicle and the vehicle have the same specification;

and determining the insulation reference model according to the corresponding relation between the historical insulation parameters and the historical use parameters.

Optionally, the determining the insulation reference model according to the corresponding relationship between the historical insulation parameters and the historical usage parameters includes:

acquiring a first historical insulation parameter and a historical driving parameter of a sample vehicle in an environment described by the historical environment parameter;

acquiring second historical insulation parameters corresponding to various historical use states from the first historical insulation parameters;

for a second historical insulation parameter corresponding to each historical use state, acquiring a third historical insulation parameter matched with the time parameter in the second historical insulation parameters, and determining a first insulation reference model describing the corresponding relation between the third historical insulation parameter and the time parameter;

and for a second historical insulation parameter corresponding to each historical use state, acquiring a fourth historical insulation parameter matched with the mileage parameter in the second historical insulation parameters, and determining a second insulation reference model describing the corresponding relation between the fourth historical insulation parameter and the mileage parameter.

According to a second aspect, the present disclosure provides a vehicle insulation monitoring device, including:

the parameter acquisition unit is used for acquiring the current use parameters and the current insulation parameters of the vehicle;

the model determining unit is used for determining a target insulation reference model matched with the current use parameter according to the corresponding relation between the historical use parameter and the insulation reference model, and the insulation reference model is a model which is obtained according to the historical insulation parameter of the sample vehicle and corresponds to the historical use parameter;

and the state determining unit is used for determining the insulation state of the vehicle according to the target insulation reference model and the current insulation parameter.

Optionally, the model determining unit is specifically configured to:

the first determining unit is used for determining a first target insulation reference model corresponding to the current time parameter according to the corresponding relation between the time parameter and the first insulation reference model;

and the second determining unit is used for determining a second target insulation reference model corresponding to the current mileage parameter according to the corresponding relation between the mileage parameter and the second insulation reference model.

Optionally, the model determining unit is specifically configured to:

Optionally, the vehicle insulation monitoring apparatus further includes a reference parameter obtaining unit, configured to:

Optionally, the state determination unit is specifically configured to:

Optionally:

Optionally, the vehicle insulation monitoring apparatus further includes an insulation performance determining unit, configured to:

Optionally, the vehicle insulation monitoring apparatus further includes a model obtaining unit, configured to:

Optionally, the historical driving parameters include a time parameter and a mileage parameter, the historical usage parameters include a historical environmental parameter, a historical usage state, and a historical driving parameter, and the model obtaining unit is configured to:

In a third aspect, the present disclosure provides an electronic device having one or more instructions stored thereon, which when executed by the electronic device, implement the method of any of the first aspects.

Compared with the prior art, the scheme of the embodiment of the disclosure at least has the following beneficial effects:

according to the method and the device for determining the insulation state of the vehicle, the reference insulation parameter of the vehicle is obtained according to the target insulation reference model corresponding to the current use parameter, and whether the insulation state of the vehicle is in accordance with the expectation or not is determined according to the reference insulation parameter and the current insulation parameter. The current use parameters at least comprise environment parameters, so that the insulation state of the vehicle in different environments or regions is judged, the error of judging the insulation state by a single factor is reduced, the accuracy of the insulation state is improved, and the safety of the vehicle is improved.

Drawings

The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements. It should be understood that the drawings are schematic and that elements and elements are not necessarily drawn to scale. In the drawings:

FIG. 1 shows a flow chart of a vehicle insulation monitoring method according to an embodiment of the present disclosure;

FIG. 2 shows a flow chart of a vehicle insulation monitoring method according to yet another embodiment of the present disclosure;

FIG. 3 shows a flow chart of a vehicle insulation monitoring method according to yet another embodiment of the present disclosure;

FIG. 4 shows a flow chart of a vehicle insulation monitoring method according to yet another embodiment of the present disclosure;

FIG. 5 illustrates a schematic diagram of a first insulation reference model provided by an embodiment;

FIG. 6 illustrates a second insulation reference model schematic provided by an embodiment;

fig. 7 shows a block diagram of elements of a vehicle insulation monitoring device according to an embodiment of the present disclosure.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

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.

For a better understanding of the embodiments of the present disclosure, we first describe the terms to which the embodiments of the present disclosure apply.

The use parameters are parameters related to the vehicle in the use process, and at least comprise any combination of the following parameters: environmental parameters, usage status, driving parameters. Wherein the content of the first and second substances,

the environment parameters are used for describing the environment or region where the vehicle is used;

the use state is an operating state of the vehicle, such as a parking state, a driving state and a charging state, the parking state may also be referred to as a parking state, and the driving state may also be referred to as a driving state;

the driving parameters are used for describing some parameters of the vehicle driving, and at least comprise a mileage parameter and a time parameter, wherein the mileage parameter is used for describing mileage driven by the vehicle, and the time parameter is used for describing time driven by the vehicle.

The insulation parameter is the most basic safety index for measuring electrical equipment and electrical circuits in the electric automobile. For the same vehicle, the insulation parameters of the vehicle are dynamically changed under the influence of various factors. For example, the insulation parameters of the vehicle decrease with increasing ambient temperature and decrease with increasing ambient humidity. And the insulation parameters are different among vehicles of different vehicle types. Alternative embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the vehicle insulation monitoring method according to an embodiment of the present disclosure may be applied to electronic devices, such as a computer terminal and a server, where the server may be a cloud server.

S101, obtaining current use parameters and current insulation parameters of the vehicle.

The current use parameters are current parameters related to the vehicle in the use process, and at least comprise any combination of the following parameters: current environmental parameters, current use state and current driving parameters. For example, if the vehicle is running in an environment with 16 ℃ and 50% relative humidity in city a, and the total running time is 1 month and the mileage is 2W kilometers, the current environmental parameters are: the area is an urban area A, the temperature is 16 ℃, the relative humidity is 50%, the current use state is a driving state, and the current driving parameters are as follows: the time parameter is 1 month, and the mileage parameter is 2W kilometers, then the current usage parameter can be the current environmental parameter, or the current usage state, or the current driving parameter, or the current environmental parameter, the current usage state, or the current environmental parameter, the current driving parameter, or the current driving parameter, the current usage state, or the current environmental parameter, the current usage state, or the current driving parameter.

The current insulation parameter, which is an insulation value (i.e., an insulation resistance value), is the most basic safety index for measuring electrical equipment and electrical lines in the electric vehicle.

The current usage parameters and the current insulation parameters of the vehicle may be obtained by a vehicle controller, which sends the current usage parameters and the current insulation parameters to the electronic device.

S102, determining a target insulation reference model matched with the current use parameters according to the corresponding relation between the historical use parameters and the insulation reference model, wherein the insulation reference model is a model which is obtained according to the historical insulation parameters of the sample vehicle and corresponds to the historical use parameters.

The disclosed embodiment presets an insulation reference model corresponding to the use parameter, which is a model corresponding to a historical use parameter obtained from a historical insulation parameter of a sample vehicle. In the embodiment of the disclosure, the sample vehicle has the same specification as the vehicle, and the same specification means that the vehicle has the same standard, such as brand, model, size, weight, precision, performance and the like.

S103, determining the insulation state of the vehicle according to the target insulation reference model and the current insulation parameters.

A reference insulation parameter of the vehicle may be obtained using a target insulation reference model corresponding to the current usage parameter. And then determining whether the insulation state of the vehicle is in accordance with the expectation according to the reference insulation parameter and the current insulation parameter.

According to the method and the device for determining the insulation state of the vehicle, the reference insulation parameter of the vehicle is obtained according to the target insulation reference model corresponding to the current use parameter, and whether the insulation state of the vehicle is in accordance with the expectation or not is determined according to the reference insulation parameter and the current insulation parameter. The current use parameters at least comprise environment parameters, so that the insulation state of the vehicle in different environments or regions is judged, the error of judging the insulation state by a single factor is reduced, the accuracy of the insulation state is improved, and manual judgment is not needed.

Referring to fig. 2, in order to provide a vehicle insulation monitoring method according to an embodiment of the present disclosure, the method may be applied to an electronic device, such as a computer terminal and a server, where the server may be a cloud server.

S201, obtaining current use parameters and current insulation parameters of the vehicle.

And the current use parameters comprise current driving parameters, and the current driving parameters comprise current time parameters and current mileage parameters. For example, if the vehicle is running in an environment with 16 ℃ and 50% relative humidity in city a, and the total running time is 1 month and the mileage is 2W kilometers, the current environmental parameters are: the area is an urban area A, the temperature is 16 ℃, the relative humidity is 50%, the current use state is a driving state, and the current driving parameters are as follows: the time parameter is 1 month, and the mileage parameter is 2W kilometers, then the current use parameter is 1 month, and the mileage parameter is 2W kilometers.

S202, determining a first target insulation reference model corresponding to the current time parameter according to the corresponding relation between the time parameter and the first insulation reference model; and determining a second target insulation reference model corresponding to the current mileage parameter according to the corresponding relation between the mileage parameter and the second insulation reference model.

The embodiment of the disclosure sets a first insulation reference model and a second insulation reference model in advance. The first insulation reference model is a model corresponding to the time parameter, which is obtained according to the historical insulation parameter corresponding to the time parameter of the sample vehicle; the second insulation reference model is a model corresponding to the mileage parameter, which is obtained according to the historical insulation parameters corresponding to the mileage parameter of the sample vehicle. In the embodiment of the disclosure, the sample vehicle has the same specification as the vehicle, and the same specification means that the vehicle has the same standard, such as brand, model, size, weight, precision, performance and the like.

S203, acquiring a first reference insulation parameter corresponding to the current time parameter by using the first target insulation reference model, and acquiring a second reference insulation parameter corresponding to the current mileage parameter by using the second target insulation reference model.

And respectively obtaining a first reference insulation parameter corresponding to the current time parameter and a second reference insulation parameter corresponding to the current mileage parameter of the vehicle by using the first target insulation reference model and the second target insulation reference model corresponding to the current use parameter. And then determining whether the insulation state of the vehicle is in accordance with the expectation according to the reference insulation parameter and the current insulation parameter.

And S204, determining the insulation state of the vehicle according to the first reference insulation parameter, the second reference insulation parameter and the current insulation parameter.

According to the embodiment of the disclosure, whether the insulation state of the vehicle has a descending trend or not can be determined from two dimensions of the time parameter and the mileage parameter, and a corresponding alarm strategy is started according to the descending trend, so that the safety of the vehicle is improved, the thermal runaway of the battery caused by insulation failure is prevented, and the occurrence probability of the safety accident of the electric vehicle is reduced.

In one embodiment, if the current insulation parameter is smaller than one of the first reference insulation parameter and the second reference insulation parameter, the insulation performance of the vehicle is considered to have a degradation trend, and a first alarm strategy is started to prompt that the insulation state of the vehicle has the degradation trend. And if the current insulation parameters are smaller than the first reference insulation parameter and the second reference insulation parameter, the insulation performance of the vehicle is considered to have a failure trend (namely insulation risk), and a second alarm strategy is started to prompt that the insulation state of the vehicle has the failure trend.

In another embodiment, if the current insulation parameter is smaller than the current state fraction value of the first reference insulation parameter, or the current insulation parameter is smaller than the current state fraction value of the second reference insulation parameter, a first alarm strategy is executed, where the first alarm strategy is used to indicate that the insulation state of the vehicle has a degradation trend. And if the current insulation parameter is smaller than the current state occupation ratio of the first reference insulation parameter and the current insulation parameter is smaller than the current state occupation ratio of the second reference insulation parameter, executing a second alarm strategy, wherein the second alarm strategy is used for prompting that the insulation state of the vehicle has a failure trend.

In one embodiment, the different usage states have different status ratios, that is, the usage state has a corresponding relationship with the status ratio, and the current status ratio has a corresponding relationship with the current usage state, which may be:

It should be understood that the current status ratio can be customized according to the situation.

In other embodiments, if the current insulation parameter is less than at least one of the first reference insulation parameter and the second reference insulation parameter, or the current state fraction value of the current insulation parameter is less than at least one of the first reference insulation parameter and the second reference insulation parameter, the insulation performance or the insulation state of the vehicle is considered to have a downward trend. The downward trend includes a deterioration trend, a failure trend, and it is understood that the failure trend is more severe than the downward trend of the insulation performance indicated by the deterioration trend. The unit that insulating properties descends in we can also confirm the vehicle according to the user state of difference, can help the technical staff to fix a position the unit that insulating properties descends fast, solves the electrical insulation problem fast, prevents the battery thermal runaway that insulating failure leads to, reduces the emergence probability of electric automobile incident.

For example: and if the current use state is the parking state, determining that a unit with reduced insulation performance in the vehicle is a high-voltage loop in the battery pack. In one example, when it is determined that the insulation state has a tendency to deteriorate according to the foregoing embodiment, the unit in which the insulation performance deteriorates in the vehicle is regarded as the in-pack high-voltage circuit; when it is determined that the insulation state has a failure tendency according to the foregoing embodiment, the unit in which the insulation performance in the vehicle fails is regarded as the in-battery-pack high-voltage circuit.

Another example is: and if the current use state is a running state, determining that the unit with the reduced insulation performance in the vehicle is a high-voltage circuit in a battery pack and/or a driving high-voltage circuit. In one example, when it is determined that the insulation state has a tendency to deteriorate according to the foregoing embodiment, the unit in which the insulation performance deteriorates in the vehicle is regarded as the in-battery high-voltage circuit and/or the driving high-voltage circuit; when it is determined that the insulation state has a failure tendency according to the foregoing embodiment, the unit in which the insulation performance in the vehicle fails is regarded as the in-battery-pack high-voltage circuit and/or the driving high-voltage circuit.

For another example: and if the current use state is a charging state, determining that the unit with reduced insulation performance in the vehicle is a high-voltage circuit in the battery pack and/or a charging high-voltage circuit. In one example, when it is determined that the insulation state has a tendency to deteriorate according to the foregoing embodiment, the unit in which the insulation performance deteriorates in the vehicle is regarded as the in-pack high-voltage circuit and/or the charging high-voltage circuit; when it is determined that the insulation state has a failure tendency according to the foregoing embodiment, the unit in which the insulation performance in the vehicle fails is regarded as the in-battery-pack high-voltage circuit and/or the charging high-voltage circuit.

In some embodiments, please refer to fig. 3, which is a schematic diagram illustrating a vehicle insulation monitoring method according to an embodiment of the present disclosure, the method may be applied to an electronic device, such as a computer terminal and a server, where the server may be a cloud server.

S301, obtaining the current use parameters and the current insulation parameters of the vehicle.

And the current use parameters comprise current driving parameters and a current use state, and the current driving parameters comprise a current time parameter and a current mileage parameter. For example, if the vehicle is running in an environment with 16 ℃ and 50% relative humidity in city a, and the total running time is 1 month and the mileage is 2W kilometers, the current environmental parameters are: the area is an urban area A, the temperature is 16 ℃, the relative humidity is 50%, the current use state is a driving state, and the current driving parameters are as follows: the time parameter is 1 month, the mileage parameter is 2W kilometers, and the current use parameters are the driving state, the time parameter is 1 month, and the mileage parameter is 2W kilometers.

S302, determining a first target insulation reference model corresponding to the current time parameter in the first insulation reference model in the current use state; and determining a second target insulation reference model corresponding to the current mileage parameter in the second insulation reference model corresponding to the current use state.

The embodiment of the disclosure sets a first insulation reference model and a second insulation reference model in advance. The first insulation reference model is a model corresponding to different use states obtained according to historical insulation parameters corresponding to the sample vehicle and the time parameters, and the second insulation reference model is a model corresponding to different use states obtained according to historical insulation parameters corresponding to the sample vehicle and the mileage parameters. In the embodiment of the disclosure, the sample vehicle has the same specification as the vehicle, and the same specification means that the vehicle has the same standard, such as brand, model, size, weight, precision, performance and the like.

Based on the preset first insulation reference model and the second insulation reference model, the first target insulation reference model and the second target insulation reference model in different use states can be obtained. For example:

if the current use state is the parking state, determining a first target insulation reference model corresponding to the current time parameter in a first insulation reference model corresponding to the parking state, and determining a second target insulation reference model corresponding to the current mileage parameter in a second insulation reference model corresponding to the parking state;

if the current use state is the driving state, determining a first target insulation reference model corresponding to the current time parameter in a first insulation reference model corresponding to the driving state, and determining a second target insulation reference model corresponding to the current mileage parameter in a second insulation reference model corresponding to the driving state;

if the current use state is the charging state, determining a first target insulation reference model corresponding to the current time parameter in a first insulation reference model corresponding to the charging state, and determining a second target insulation reference model corresponding to the current mileage parameter in a second insulation reference model corresponding to the charging state.

S303, acquiring a first reference insulation parameter corresponding to the current time parameter by using the first target insulation reference model, and acquiring a second reference insulation parameter corresponding to the current mileage parameter by using the second target insulation reference model.

S304, determining the insulation state of the vehicle according to the first reference insulation parameter, the second reference insulation parameter and the current insulation parameter. Please refer to S204, which is not described herein.

The embodiment of the disclosure can determine the insulation state of the vehicle from two dimensions of time parameters and mileage parameters when the use states of the vehicle are different, namely the current use states of the vehicle are different, so that different influences of the use states on the insulation change trend of the electric automobile can be reduced, the factors that the use states interfere with the insulation judgment of the vehicle are reduced, and the actual condition of the insulation failure judgment of the vehicle is more fitted. In addition, the embodiment of the disclosure can also judge whether the insulation state of the vehicle has a descending trend, and start a corresponding alarm strategy according to the degree of the descending trend, thereby improving the safety of the vehicle, preventing the thermal runaway of the battery caused by insulation failure, and reducing the occurrence probability of the safety accident of the electric vehicle. The embodiment of the disclosure can also determine the unit with reduced insulation performance in the vehicle according to different use states, can help technicians to quickly locate the unit with reduced insulation performance, and quickly solves the problem of electrical insulation.

Referring to fig. 4, in order to provide a vehicle insulation monitoring method according to an embodiment of the present disclosure, the method may be applied to an electronic device, such as a computer terminal and a server, where the server may be a cloud server.

S401, obtaining current use parameters and current insulation parameters of the vehicle.

And the current use parameters comprise current driving parameters, current use states and current environment parameters, and the current driving parameters comprise current time parameters and current mileage parameters. For example, if the vehicle is running in an environment with 16 ℃ and 50% relative humidity in city a, and the total running time is 1 month and the mileage is 2W kilometers, the current environmental parameters are: the area is an urban area A, the temperature is 16 ℃, the relative humidity is 50%, the current use state is a driving state, and the current driving parameters are as follows: the time parameter is 1 month, the mileage parameter is 2W kilometers, and the current use parameters are the area A, the temperature is 16 ℃, the relative humidity is 50%, the driving state, the time parameter is 1 month, and the mileage parameter is 2W kilometers.

S402, determining a first target insulation reference model corresponding to a current time parameter and a current environment parameter in the first insulation reference model in the current use state; and determining a second target insulation reference model corresponding to the current mileage parameter and the current environment parameter in the second insulation reference model corresponding to the current use state.

The embodiment of the disclosure sets a first insulation reference model and a second insulation reference model in advance. The first insulation reference model is obtained according to different environment parameters, different use states and historical insulation parameters corresponding to time parameters, and the second insulation reference model is obtained according to different environment parameters, different use states and historical insulation parameters corresponding to mileage parameters. In the embodiment of the disclosure, the sample vehicle has the same specification as the vehicle, and the same specification means that the vehicle has the same standard, such as brand, model, size, weight, precision, performance and the like.

if the current use state is the parking state, determining a first insulation reference model and a second insulation reference model corresponding to the parking state, determining a first target insulation reference model corresponding to a current time parameter and a current environment parameter in the first insulation reference model corresponding to the parking state, and determining a second target insulation reference model corresponding to a current mileage parameter and a current environment parameter in the second insulation reference model corresponding to the parking state;

if the current use state is the driving state, determining a first insulation reference model and a second insulation reference model corresponding to the driving state, determining a first target insulation reference model corresponding to the current time parameter and the current environment parameter in the first insulation reference model corresponding to the driving state, and determining a second target insulation reference model corresponding to the current mileage parameter and the current environment parameter in the second insulation reference model corresponding to the driving state;

if the current using state is the charging state, determining a first insulation reference model and a second insulation reference model corresponding to the charging state, determining a first target insulation reference model corresponding to the current time parameter and the current environment parameter in the first insulation reference model corresponding to the charging state, and determining a second target insulation reference model corresponding to the current mileage parameter and the current environment parameter in the second insulation reference model corresponding to the charging state.

And S403, acquiring a first reference insulation parameter corresponding to the current time parameter by using the first target insulation reference model, and acquiring a second reference insulation parameter corresponding to the current mileage parameter by using the second target insulation reference model.

S404, determining the insulation state of the vehicle according to the first reference insulation parameter, the second reference insulation parameter and the current insulation parameter. Please refer to S204, which is not described herein.

The embodiment of the disclosure can determine the insulation state of the vehicle from two dimensions of time parameter and mileage parameter when the area, temperature, humidity and use state of the vehicle are different, namely when the current environmental parameter and the current use state of the vehicle are different, so that different influences of the terrain, temperature and humidity of different areas on the insulation change trend of the electric vehicle can be reduced, the factors of the environment parameter interference vehicle insulation judgment are reduced, and the actual condition of the vehicle insulation failure judgment is more fitted. In addition, the embodiment of the disclosure can also judge whether the insulation state of the vehicle has a descending trend, and start a corresponding alarm strategy according to the degree of the descending trend, thereby improving the safety of the vehicle, preventing the thermal runaway of the battery caused by insulation failure, and reducing the occurrence probability of the safety accident of the electric vehicle. The embodiment of the disclosure can also determine the unit with reduced insulation performance in the vehicle according to different use states, can help technicians to quickly locate the unit with reduced insulation performance, and quickly solves the problem of electrical insulation.

Referring to fig. 5, a method of insulating a reference model according to an embodiment is shown, where the embodiment is executed by an electronic device (e.g., a server, a computer terminal, etc.).

S5001, obtaining historical insulation parameters and historical use parameters of the sample vehicle, wherein the sample vehicle and the vehicle have the same specification.

In the disclosed embodiment, the historical use parameters include historical environment parameters, historical use states and historical driving parameters, the historical driving parameters include time parameters and mileage parameters, and the specific explanation of the historical insulation parameters and the historical use parameters refers to the insulation parameters and the use parameters in the previous embodiments and is not described again here.

S5002, determining an insulation reference model according to the corresponding relation between the historical insulation parameters and the historical use parameters.

The process of S5002 determining the insulation reference model is specifically as follows.

1. A first historical insulation parameter and a historical driving parameter of a sample vehicle in an environment described by the historical environment parameter are obtained.

In one embodiment, when the vehicle and the electronic device establish a communication connection, the vehicle is considered as an online vehicle, the online vehicle can actively send the use parameters and the insulation parameters of the online vehicle to the electronic device, and the electronic device can also periodically obtain the use parameters and the insulation parameters from the online vehicle. Herein, the obtained use parameters and insulation parameters of the online vehicle are respectively called historical use parameters and historical insulation parameters. The historical use parameters comprise historical environment parameters, historical use states and historical driving parameters, and the historical driving parameters comprise time parameters and mileage parameters.

The method comprises the steps that historical insulation parameters and historical use parameters of all online vehicles are obtained, the online vehicles are divided into different sample vehicle sets by the electronic equipment according to the specifications of the vehicles, and each sample vehicle set is grouped according to historical environment parameters, namely the online vehicles are grouped according to main driving regions (with terrain, temperature and humidity as grouping bases).

After the grouping according to the process, the first historical insulation parameter and the historical driving parameter of the sample vehicle with the same specification as the vehicle in the environment described by different historical environment parameters can be obtained.

2. In the first historical insulation parameter, a second historical insulation parameter corresponding to each historical use state is acquired.

Here, the historical use state includes a drive state, a parking state, and a charge state.

3. For a second historical insulation parameter corresponding to each historical use state, acquiring a third historical insulation parameter matched with the time parameter in the second historical insulation parameters, and determining a first insulation reference model describing the corresponding relation between the third historical insulation parameter and the time parameter;

and for the second historical insulation parameters corresponding to each historical use state, acquiring fourth historical insulation parameters matched with the mileage parameters in the second historical insulation parameters, and determining a second insulation reference model describing the corresponding relation between the fourth historical insulation parameters and the mileage parameters.

For example, the electronic device obtains a second historical insulation parameter corresponding to the driving state from the first historical insulation parameter, processes the second historical insulation parameter corresponding to the driving state to obtain curves of average values of the insulation parameters corresponding to the time parameter and the mileage parameter, and performs fitting processing on the two curves to obtain a first insulation reference model describing a corresponding relationship between the time parameter and the insulation parameter in the driving state and a first insulation reference model describing a corresponding relationship between the mileage parameter and the insulation parameter in the driving state.

For another example, the electronic device obtains a second historical insulation parameter corresponding to the parking state from the first historical insulation parameter, processes the second historical insulation parameter corresponding to the parking state to obtain curves of average values of insulation parameters corresponding to the time parameter and the mileage parameter, and performs fitting processing on the two curves to obtain a first insulation reference model describing a corresponding relationship between the time parameter and the insulation parameter in the parking state and a first insulation reference model describing a corresponding relationship between the mileage parameter and the insulation parameter in the parking state.

For another example, the electronic device obtains a second historical insulation parameter corresponding to the charging state from the first historical insulation parameter, processes the second historical insulation parameter corresponding to the charging state to obtain curves of average values of the insulation parameters corresponding to the time parameter and the mileage parameter, and performs fitting processing on the two curves to obtain a first insulation reference model describing a corresponding relationship between the time parameter and the insulation parameter in the charging state and a first insulation reference model describing a corresponding relationship between the mileage parameter and the insulation parameter in the charging state.

As shown in fig. 6, the first insulation reference model is corresponding to a certain usage state, and the first insulation reference model is used for describing the corresponding relationship between the time parameter and the insulation parameter. As shown in fig. 7, the second insulation reference model is corresponding to a certain usage state, and the second insulation reference model is used for describing the corresponding relationship between the mileage parameter and the insulation parameter.

Referring to fig. 7, fig. 7 shows a vehicle insulation monitoring device according to an embodiment of the present disclosure, including: a parameter acquisition unit 701, a model determination unit 702, and a state determination unit 703. The explanation of each unit is as follows.

A parameter obtaining unit 701 configured to obtain a current usage parameter and a current insulation parameter of the vehicle; .

A model determining unit 702, configured to determine, according to a correspondence between the historical usage parameters and an insulation reference model, a target insulation reference model matching the current usage parameters, where the insulation reference model is a model corresponding to the historical usage parameters obtained according to the historical insulation parameters of the sample vehicle.

A state determining unit 703, configured to determine an insulation state of the vehicle according to the target insulation reference model and the current insulation parameter.

Optionally, the model determining unit 702 is specifically configured to:

Optionally, the state determining unit 703 is specifically configured to:

Optionally:

The embodiment of the present disclosure further provides an electronic device, where one or more instructions are stored in the electronic device, and when executed by the electronic device, the one or more instructions implement the vehicle insulation monitoring method according to any one of the foregoing embodiments.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other embodiments in which any combination of the features described above or their equivalents does not depart from the spirit of the disclosure. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.

Further, while operations are depicted in an order, this should not be understood as requiring that such operations be performed in the order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A vehicle insulation monitoring method, comprising:

2. The method of claim 1, wherein the current usage parameters include current driving parameters including a current time parameter and a current mileage parameter, the insulated reference model includes a first insulated reference model and a second insulated reference model;

3. The method of claim 2,

4. The method of claim 2, wherein the current usage parameters further comprise a current usage state, the historical usage parameters comprise usage states, the usage states comprise a parking state, a driving state and a charging state, the insulation reference model comprises a first insulation reference model and a second insulation reference model of different usage states, the first insulation reference model is a model corresponding to different usage states obtained from historical insulation parameters of the sample vehicle corresponding to time parameters, and the second insulation reference model is a model corresponding to different usage states obtained from historical insulation parameters of the sample vehicle corresponding to mileage parameters.

5. The method of claim 4,

6. The method of claim 4, wherein the current usage parameters further include current environmental parameters and the historical usage parameters further include environmental parameters, and wherein the insulation reference model includes a first insulation reference model obtained from historical insulation parameters corresponding to different environmental parameters, different usage states, and time parameters and a second insulation reference model obtained from historical insulation parameters corresponding to different environmental parameters, different usage states, and mileage parameters.

7. The method of claim 6,

the step of determining a target insulation reference model matched with the current use parameters according to the corresponding relation between the historical use parameters and the insulation reference model comprises the following steps: determining a first target insulation reference model corresponding to the current time parameter, the current environment parameter and the current use state in the first insulation reference model; and determining a second target insulation reference model corresponding to the current mileage parameter and the current environment parameter in the second insulation reference model corresponding to the current use state.

8. The method of claim 6,

before determining the insulation state of the vehicle according to the target insulation reference model and the current insulation parameter, the method further includes:

9. The method of claim 8, wherein said determining an insulation state of the vehicle based on the target insulation reference model and the current insulation parameters comprises:

10. The method of claim 9, wherein:

11. The method according to any one of claims 1-8, further comprising:

12. The method of claim 1, further comprising, prior to said obtaining current usage parameters and current insulation parameters of the vehicle:

13. The method of claim 12, wherein the historical driving parameters comprise a time parameter, a mileage parameter, and historical usage parameters comprise a historical environmental parameter, a historical usage status, and a historical driving parameter, and wherein determining the insulation reference model based on the historical insulation parameter to historical usage parameter correspondence comprises:

14. A vehicle insulation monitoring device, comprising:

15. An electronic device, wherein the electronic device stores one or more instructions that, when executed by the electronic device, implement the method of any of claims 1-13.