CN116031509A - High-voltage loop current determination method, device, equipment, medium and product - Google Patents
High-voltage loop current determination method, device, equipment, medium and product Download PDFInfo
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Abstract
The present application relates to a high voltage loop current determination method, apparatus, computer device, storage medium and computer program product. The method comprises the following steps: firstly, acquiring a power-on state of a battery management system, then acquiring a first current value of a high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by a Hall sensor, then calculating a current compensation value according to the first current value and the acquisition period number, and finally determining a target current value according to the current compensation value. According to the method, the current compensation value can be determined according to the first current value and the acquisition period number acquired by the Hall sensor, additional hardware is not required to be added, the Hall sensor has no special requirements, the cost can be effectively reduced, and the universality is higher.
Description
Technical Field
The present application relates to the field of power battery technology, and in particular, to a method, an apparatus, a computer device, a storage medium, and a computer program product for determining a high-voltage loop current.
Background
The battery management system is one of core components of the electric vehicle, and the main functions comprise signal acquisition, state monitoring, parameter estimation, charge and discharge management, fault diagnosis and the like of the power battery system. The signal acquisition is a basis for supporting the functions of the battery management system, and is also an important factor for guaranteeing the normal execution of the control strategy and the state estimation of the system. The high-voltage loop current is taken as one of key parameters of the power battery system, and is usually collected by a Hall sensor. Because the Hall sensor is influenced by external power supply voltage fluctuation, acquisition voltage fluctuation, electromagnetic interference, mechanical vibration, self manufacturing process, element precision and other factors, when the actual current in the acquisition loop is zero, the output acquisition current has certain deviation, namely, drift phenomenon is generated at the current zero point. The accuracy of current collection directly influences the accuracy of estimation of parameters such as the battery state of charge and the battery power state, and the accuracy of battery charge and discharge management and fault diagnosis of a battery management system on the battery system state. Therefore, it is necessary to provide a zero current compensation method of a hall sensor, which is simple and easy to implement, low in cost, high in universality and applied to a power battery system, so that the phenomenon of current zero drift is eliminated as much as possible, the current collection precision is improved, and the normal execution of the functions of a battery management system is ensured.
The current common zero current compensation method aims at temperature drift, the sensitivity of the Hall sensor and the precision of zero temperature drift compensation can be improved, but the method needs to realize current compensation by adding a hardware circuit, the product cost of the Hall sensor is improved, the relevance degree with the model and the specification of the Hall sensor is higher, and the method has no universal applicability.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a high-voltage loop current determination method, apparatus, computer device, computer-readable storage medium, and computer program product that can reduce costs and have high versatility.
In a first aspect, the present application provides a high voltage loop current determination method for a system comprised of a high voltage loop and a battery management system, the high voltage loop comprising a power battery pack, a hall sensor, a load, and a high voltage relay; the method comprises the following steps:
acquiring a power-on state of the battery management system;
acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor;
calculating a current compensation value according to the first current value and the acquisition period number;
and determining a target current value according to the current compensation value.
In one embodiment, the obtaining the power-on state of the battery management system includes:
judging whether the battery management system can acquire target state parameters of the power battery pack or not;
and if the battery management system can acquire the target state parameter of the power battery pack, determining that the power-on state of the battery management system is successful in power-on.
In one embodiment, after the determining that the power-up state of the battery management system is power-up success, the method further includes:
judging whether the target state parameter meets a preset condition or not, wherein the preset condition comprises that the battery voltage is larger than a preset voltage threshold value and the battery temperature is larger than a preset temperature threshold value;
and if the target state parameter at least meets one preset condition, sending out alarm information.
In one embodiment, the obtaining the first current value of the high-voltage loop according to the power-on state includes:
if the power-on state of the battery management system is that the power-on is successful, judging whether the high-voltage relay is closed or not;
and if the high-voltage relay is not closed, continuing to acquire the first current value.
In one embodiment, after the determining whether the high voltage relay is closed, the method further includes:
and stopping continuing to acquire the first current value if the high-voltage relay is already closed.
In one embodiment, the determining the target current value according to the current compensation value includes:
after the high-voltage relay is closed, acquiring a second current value periodically acquired by the Hall sensor from the high-voltage loop;
and determining the target current value according to the difference value of the second current value and the current compensation value.
In a second aspect, the present application provides a high voltage loop current determination apparatus, the apparatus comprising:
the first acquisition module is used for acquiring the power-on state of the battery management system;
the second acquisition module is used for acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor;
the calculating module is used for calculating a current compensation value according to the first current value and the acquisition cycle number;
and the determining module is used for determining a target current value according to the current compensation value.
In a third aspect, the present application also provides a computer device. The computer device comprises a memory storing a computer program and a processor implementing the steps of the method of any of the embodiments described above when the processor executes the computer program.
In a fourth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of any of the embodiments described above.
In a fifth aspect, the present application also provides a computer program product. The computer program product comprising a computer program which, when executed by a processor, implements the steps of the method of any of the embodiments described above.
The method, the device, the computer equipment, the storage medium and the computer program product for determining the high-voltage loop current firstly acquire the power-on state of the battery management system, then acquire a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor, then calculate a current compensation value according to the first current value and the acquisition period number, and finally determine a target current value according to the current compensation value. According to the method, the current compensation value can be determined according to the first current value and the acquisition period number acquired by the Hall sensor, additional hardware is not required to be added, the Hall sensor has no special requirements, the cost can be effectively reduced, and the universality is higher.
Drawings
FIG. 1 is a diagram of an application environment of a high voltage loop current determination method in one embodiment;
FIG. 2 is a flow chart of a method of determining a high voltage loop current in one embodiment;
FIG. 3 is a flow chart of a method for determining a power-on state of a battery management system according to one embodiment;
FIG. 4 is a flow chart of a method of determining high voltage loop current in another embodiment;
FIG. 5 is a block diagram of a high voltage loop current determination device in one embodiment;
fig. 6 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The method for determining the high-voltage loop current provided by the embodiment of the application can be applied to an application environment shown in fig. 1. The system of fig. 1 includes a high voltage loop 102 and a battery management system 104, wherein the high voltage loop 102 includes a power battery pack 1022, a hall sensor 1024, a load 1026, and a high voltage relay 1028. The high voltage loop 102 is used for transmitting electric energy generated by a charging process and a discharging process of the load 1026, the battery management system 104 is used for controlling a process of collecting current by the hall sensor 1024, the power battery pack 1022 is used for providing electric energy for the high voltage loop 102, the hall sensor 1024 is used for collecting current in the high voltage loop 102, the load 1026 is used for receiving the electric energy of the high voltage loop 102 or releasing the electric energy to the high voltage loop 102, and the high voltage relay 1028 is used for controlling the on or off of the high voltage loop 102.
In one embodiment, as shown in fig. 2, a high-voltage loop current determining method is provided, and the method is applied to the battery management system in fig. 1 for illustration, and includes the following steps:
s202, acquiring a power-on state of the battery management system.
The battery management system is one of core components of the electric vehicle, and the main functions comprise signal acquisition, state monitoring, parameter estimation, charge and discharge management, fault diagnosis and the like of the power battery system, and the power-on state of the battery management system comprises an electrified state and a powered-off state.
S204, acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor.
The first current value is a current periodically collected by the hall sensor from the high-voltage loop when the battery management system is in an energized state and the high-voltage relay is in an off state, at which time the actual current on the high-voltage loop is zero. The hall sensor is a magnetic field sensor made according to the hall effect.
Specifically, when the battery management system is in an energized state and the high-voltage relay is in an off state, the battery management system acquires the current value of the hall sensor on the high-voltage loop acquired at each acquisition cycle.
S206, calculating a current compensation value according to the first current value and the acquisition period number.
The collection period number refers to the accumulated period number of the current collected by the Hall sensor, and the current compensation value refers to the average difference value between the current value collected by the Hall sensor and the actual current of the high-voltage loop when the actual current of the high-voltage loop is zero. The calculation formula of the current compensation value is as follows:
wherein t is the number of acquisition periods, M t For the average value of the first current values acquired in t periods, I t 、I t-1 … each represents a first current value acquired in each period, N is an average term number, N is a positive integer, N is less than or equal to t, and n=100 is usually taken.
S208, determining a target current value according to the current compensation value.
The target current value refers to an actual output current value of the high-voltage circuit, which is determined according to the current compensation value and the current value acquired by the Hall sensor at the moment when the high-voltage relay is in a closed state.
According to the method for determining the high-voltage loop current, the power-on state of the battery management system is firstly obtained, then the first current value of the high-voltage loop is obtained according to the power-on state, the first current value is periodically collected by the Hall sensor, then the current compensation value is calculated according to the first current value and the collection period number, and finally the target current value is determined according to the current compensation value. According to the method, the current compensation value can be determined according to the first current value and the acquisition period number acquired by the Hall sensor, additional hardware is not required to be added, the Hall sensor has no special requirements, the cost can be effectively reduced, and the universality is higher.
In some embodiments, as shown in fig. 3, fig. 3 is a flowchart of a method for determining a power-on state of a battery management system according to an embodiment of the present application, where the method includes: judging whether the battery management system can acquire target state parameters of the power battery pack; if the battery management system can acquire the target state parameters of the power battery pack, the power-on state of the battery management system is determined to be successful in power-on.
In this step, the target state parameter of the power battery pack refers to the relevant physical parameter of the power battery, and for example, the target state parameter may be a battery voltage, a battery temperature, and a battery current.
Specifically, after the battery management system is electrified, whether the battery management system can normally acquire the target state parameters of the power battery pack is judged, if the target state parameters of the power battery pack can be acquired, the battery management system is electrified successfully, if the target state parameters of the power battery pack cannot be acquired, the battery management system is electrified failure, and alarm information is sent to remind workers that the battery management system or the power battery pack fails.
According to the method provided by the step, the successful power-on of the battery management system is determined under the condition that the battery management system can normally acquire the target state parameters, and the safety of the power-on process of the battery management system can be ensured.
In some embodiments, after determining that the power-up state of the battery management system is successful, the method further comprises: judging whether the target state parameter meets a preset condition or not, wherein the preset condition comprises that the battery voltage is larger than a preset voltage threshold value and the battery temperature is larger than a preset temperature threshold value; and if the target state parameter at least meets a preset condition, sending out alarm information.
In this step, the preset voltage threshold and the preset temperature threshold are the highest voltage and the highest temperature that ensure the safety of the power battery pack.
Specifically, when the battery voltage in the target state parameter is greater than a preset voltage threshold or the battery temperature is greater than a preset temperature threshold, the potential safety hazard of the power battery pack is indicated, even the power battery pack is likely to fire and burn, and the battery management system sends out alarm information to remind workers of the potential safety hazard of the power battery pack.
According to the method provided by the step, when the temperature and the voltage of the power battery pack are overlarge, workers are reminded of potential safety hazards, the potential safety hazards need to be treated in time, and the safety of the power battery pack and the whole vehicle can be guaranteed.
In some embodiments, obtaining a first current value of the high voltage loop based on the power-on state includes: if the power-on state of the battery management system is that the power-on is successful, judging whether the high-voltage relay is closed or not; if the high-voltage relay is not closed, the first current value is continuously acquired.
In this step, in order to determine a current compensation value between a current value of a high-voltage loop collected by a hall sensor and an actual current value of the high-voltage loop, the hall sensor needs to obtain the current value of the high-voltage loop collected under the condition that the high-voltage loop is disconnected, and since the actual current in the loop is zero when the high-voltage loop is disconnected, the current collected by the hall sensor is an error between the collected current and the actual current in the high-voltage loop, and then the current compensation value can be determined according to the error and the cycle number of each collection cycle when the high-voltage loop is disconnected.
Specifically, under the condition that the battery management system is powered on successfully and the high-voltage relay is not closed, the battery management system continuously acquires the current in the high-voltage loop periodically acquired by the Hall sensor.
According to the method provided by the step, the current acquired by the Hall sensor when the high-voltage loop is disconnected is regarded as an error current value, and then the current compensation value is calculated according to the error current value, so that the method is simple, and no additional equipment is required.
In some embodiments, after determining whether the high voltage relay is closed, the method further comprises: and stopping continuing to acquire the first current value if the high-voltage relay is already closed.
In the step, if the battery management system judges that the high-voltage relay is closed, the battery management system stops acquiring the current acquired by the Hall sensor.
According to the method provided by the step, when the high-voltage loop is closed, the battery management system stops acquiring current, and the current compensation value can be calculated more accurately according to the current acquired when the high-voltage loop is opened.
In some embodiments, determining the target current value from the current compensation value includes: after the high-voltage relay is closed, a second current value periodically acquired by the Hall sensor from the high-voltage loop is acquired; and determining a target current value according to the difference value between the second current value and the current compensation value.
In this step, the calculation formula of the target current value is as follows:
I out ＝-M t
wherein I is out And I is a second current value acquired by the Hall sensor in the current period.
According to the method provided by the step, the target current value is calculated according to the second current value and the current compensation value, so that the output current value can be more accurate.
In one embodiment, as illustrated in fig. 4, fig. 4 is a flow chart of a high-voltage loop current determination method in another embodiment, the method comprising the steps of:
(1) The battery management system is powered on and the initialization is completed.
(2) Judging whether the high-voltage relay is closed or not, if not, recording the current value I of the current ith sampling period i Accumulating the sampling period number t; if the device is closed, stopping recording, and jumping to the step (3).
(3) After the high-voltage relay is closed, according to the current value of each sampling period and the accumulated sampling period number recorded in the step (2), calculating a current moving average value at the current time t, wherein the calculation formula is as follows:
wherein M is t Is the moving average of the current at time t; i t 、I t-1 … represents the t-1 st … th and t-1 st … th respectivelySampling the current value recorded in the period; n is the average term number, and is a positive integer, and N is less than or equal to t. In this example, n=100 is generally taken.
(4) Reading the collected current of the Hall sensor in the current sampling period, and calculating the output current value in the current period according to the current moving average value calculated in the step 3:
I out ＝-M t
wherein I is out Outputting a current value for the battery management system in the current period; i is the current collected by a Hall sensor in the current sampling period; m is M t And calculating a current moving average value, namely a compensation value of the zero current, for the moment t.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a high-voltage loop current determining device for realizing the high-voltage loop current determining method. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the high-voltage loop current determining device or devices provided below may be referred to the limitation of the high-voltage loop current determining method hereinabove, and will not be repeated herein.
In one embodiment, as shown in fig. 5, there is provided a high-voltage loop current determining apparatus 500, comprising: a first acquisition module 501, a second acquisition module 502, a calculation module 503, and a determination module 504, wherein:
a first obtaining module 501, configured to obtain a power-on state of the battery management system.
The second obtaining module 502 is configured to obtain a first current value of the high-voltage loop according to the power-on state, where the first current value is periodically collected by the hall sensor.
A calculating module 503, configured to calculate a current compensation value according to the first current value and the number of acquisition cycles.
A determining module 504 is configured to determine a target current value according to the current compensation value.
In some embodiments, the first acquisition module 501 is further configured to: judging whether the battery management system can acquire target state parameters of the power battery pack or not; and if the battery management system can acquire the target state parameter of the power battery pack, determining that the power-on state of the battery management system is successful in power-on.
In some embodiments, the high-voltage loop current determining device 500 is specifically configured to: judging whether the target state parameter meets a preset condition or not, wherein the preset condition comprises that the battery voltage is larger than a preset voltage threshold value and the battery temperature is larger than a preset temperature threshold value; and if the target state parameter at least meets one preset condition, sending out alarm information.
In some embodiments, the second acquisition module 502 is further configured to: if the power-on state of the battery management system is that the power-on is successful, judging whether the high-voltage relay is closed or not; and if the high-voltage relay is not closed, continuing to acquire the first current value.
In some embodiments, the second acquisition module 502 is further configured to: and stopping continuing to acquire the first current value if the high-voltage relay is already closed.
In some embodiments, the determining module 504 is further configured to: after the high-voltage relay is closed, acquiring a second current value periodically acquired by the Hall sensor from the high-voltage loop; and determining the target current value according to the difference value of the second current value and the current compensation value.
The various modules in the high-voltage loop current determination device described above may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 6. The computer device includes a processor, a memory, an Input/Output interface (I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used to store current data. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a high voltage loop current determination method.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of: acquiring a power-on state of the battery management system; acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor; calculating a current compensation value according to the first current value and the acquisition period number; and determining a target current value according to the current compensation value.
In one embodiment, the obtaining the power-on state of the battery management system, which is implemented when the processor executes the computer program, includes: judging whether the battery management system can acquire target state parameters of the power battery pack or not; and if the battery management system can acquire the target state parameter of the power battery pack, determining that the power-on state of the battery management system is successful in power-on.
In one embodiment, after determining that the power-up state of the battery management system is successful when the processor executes the computer program, the method further comprises: judging whether the target state parameter meets a preset condition or not, wherein the preset condition comprises that the battery voltage is larger than a preset voltage threshold value and the battery temperature is larger than a preset temperature threshold value; and if the target state parameter at least meets one preset condition, sending out alarm information.
In one embodiment, the obtaining, by the processor, the first current value of the high voltage loop according to the power-on state when the processor executes the computer program includes: if the power-on state of the battery management system is that the power-on is successful, judging whether the high-voltage relay is closed or not; and if the high-voltage relay is not closed, continuing to acquire the first current value.
In one embodiment, after determining whether the high voltage relay is closed, as implemented when the processor executes the computer program, the method further comprises: and stopping continuing to acquire the first current value if the high-voltage relay is already closed.
In one embodiment, determining a target current value from the current compensation value implemented when the processor executes the computer program comprises: after the high-voltage relay is closed, acquiring a second current value periodically acquired by the Hall sensor from the high-voltage loop; and determining the target current value according to the difference value of the second current value and the current compensation value.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of: acquiring a power-on state of the battery management system; acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor; calculating a current compensation value according to the first current value and the acquisition period number; and determining a target current value according to the current compensation value.
In one embodiment, the obtaining the power-on state of the battery management system, when the computer program is executed by the processor, comprises: judging whether the battery management system can acquire target state parameters of the power battery pack or not; and if the battery management system can acquire the target state parameter of the power battery pack, determining that the power-on state of the battery management system is successful in power-on.
In one embodiment, after determining that the power-up state of the battery management system is successful, the method further comprises, when the computer program is executed by the processor: judging whether the target state parameter meets a preset condition or not, wherein the preset condition comprises that the battery voltage is larger than a preset voltage threshold value and the battery temperature is larger than a preset temperature threshold value; and if the target state parameter at least meets one preset condition, sending out alarm information.
In one embodiment, the obtaining the first current value according to the power-on state, which is implemented when the computer program is executed by the processor, includes: if the power-on state of the battery management system is that the power-on is successful, judging whether the high-voltage relay is closed or not; and if the high-voltage relay is not closed, continuing to acquire the first current value.
In one embodiment, after the determination of whether the high voltage relay is closed, which is implemented when the computer program is executed by the processor, the method further comprises: and stopping continuing to acquire the first current value if the high-voltage relay is already closed.
In one embodiment, determining a target current value from the current compensation value, which is implemented when the computer program is executed by the processor, comprises: after the high-voltage relay is closed, acquiring a second current value periodically acquired by the Hall sensor from the high-voltage loop; and determining the target current value according to the difference value of the second current value and the current compensation value.
In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of: acquiring a power-on state of the battery management system; acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor; calculating a current compensation value according to the first current value and the acquisition period number; and determining a target current value according to the current compensation value.
In one embodiment, the obtaining the power-on state of the battery management system, when the computer program is executed by the processor, comprises: judging whether the battery management system can acquire target state parameters of the power battery pack or not; and if the battery management system can acquire the target state parameter of the power battery pack, determining that the power-on state of the battery management system is successful in power-on.
In one embodiment, after determining that the power-up state of the battery management system is successful, the method further comprises, when the computer program is executed by the processor: judging whether the target state parameter meets a preset condition or not, wherein the preset condition comprises that the battery voltage is larger than a preset voltage threshold value and the battery temperature is larger than a preset temperature threshold value; and if the target state parameter at least meets one preset condition, sending out alarm information.
In one embodiment, the obtaining the first current value according to the power-on state, which is implemented when the computer program is executed by the processor, includes: if the power-on state of the battery management system is that the power-on is successful, judging whether the high-voltage relay is closed or not; and if the high-voltage relay is not closed, continuing to acquire the first current value.
In one embodiment, after the determination of whether the high voltage relay is closed, which is implemented when the computer program is executed by the processor, the method further comprises: and stopping continuing to acquire the first current value if the high-voltage relay is already closed.
In one embodiment, determining a target current value from the current compensation value, which is implemented when the computer program is executed by the processor, comprises: after the high-voltage relay is closed, acquiring a second current value periodically acquired by the Hall sensor from the high-voltage loop; and determining the target current value according to the difference value of the second current value and the current compensation value.
It should be noted that, the user information (including, but not limited to, user equipment information, user personal information, etc.) and the data (including, but not limited to, data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data are required to comply with the related laws and regulations and standards of the related countries and regions.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (10)
1. A high-voltage loop current determination method, which is characterized in that the method is used for a system formed by a high-voltage loop and a battery management system, wherein the high-voltage loop comprises a power battery pack, a Hall sensor, a load and a high-voltage relay; the method comprises the following steps:
acquiring a power-on state of the battery management system;
acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor;
calculating a current compensation value according to the first current value and the acquisition period number;
and determining a target current value according to the current compensation value.
2. The method of claim 1, wherein the obtaining the power-up state of the battery management system comprises:
judging whether the battery management system can acquire target state parameters of the power battery pack or not;
and if the battery management system can acquire the target state parameter of the power battery pack, determining that the power-on state of the battery management system is successful in power-on.
3. The method of claim 2, wherein after the determining that the power-up state of the battery management system is a power-up success, the method further comprises:
judging whether the target state parameter meets a preset condition or not, wherein the preset condition comprises that the battery voltage is larger than a preset voltage threshold value and the battery temperature is larger than a preset temperature threshold value;
and if the target state parameter at least meets one preset condition, sending out alarm information.
4. The method of claim 2, wherein the obtaining a first current value of the high voltage loop based on the power-on state comprises:
if the power-on state of the battery management system is that the power-on is successful, judging whether the high-voltage relay is closed or not;
and if the high-voltage relay is not closed, continuing to acquire the first current value.
5. The method of claim 4, wherein after said determining whether the high voltage relay is closed, the method further comprises:
and stopping continuing to acquire the first current value if the high-voltage relay is already closed.
6. The method of claim 1, wherein said determining a target current value from said current compensation value comprises:
after the high-voltage relay is closed, acquiring a second current value periodically acquired by the Hall sensor from the high-voltage loop;
and determining the target current value according to the difference value of the second current value and the current compensation value.
7. A high voltage loop current determination apparatus, the apparatus comprising:
the first acquisition module is used for acquiring the power-on state of the battery management system;
the second acquisition module is used for acquiring a first current value of the high-voltage loop according to the power-on state, wherein the first current value is periodically acquired by the Hall sensor;
the calculating module is used for calculating a current compensation value according to the first current value and the acquisition cycle number;
and the determining module is used for determining a target current value according to the current compensation value.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
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| CN202310011371.9A CN116031509A (en) | 2023-01-05 | 2023-01-05 | High-voltage loop current determination method, device, equipment, medium and product |
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