A method, device, equipment and medium for monitoring power battery current

Abstract

The present invention discloses a power battery current monitoring method, device, equipment, and medium. The method comprises: when a vehicle is in a high-voltage state, collecting the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency; determining the accessory current corresponding to each high-voltage accessory at a target time based on the raw current corresponding to each high-voltage accessory; using the sum of the accessory currents corresponding to each high-voltage accessory at the target time as a first total current corresponding to the power battery at the target time; collecting the second total current corresponding to the power battery at the target time from a current sensor connected to the power battery; and determining the actual total current corresponding to the power battery at the target time based on the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current. The present invention monitors the current safety of the power battery and reduces the cost of current monitoring for the power battery.

Description

Technical Field

[0001] The present invention relates to the field of automobile safety technology, and in particular to a power battery current monitoring method, device, equipment and medium. Background Art

[0002] New energy vehicles (NEVs) are vehicles that use unconventional automotive fuels as their power source. As a core component of NEVs, the safety of power batteries is crucial to the entire vehicle. Safety monitoring of power batteries primarily involves monitoring the safety of their current function. Related technologies typically utilize two current sensors: the first is typically a digital shunt, and the second is an analog Hall effect current sensor. These sensors are connected to the battery management system (BMS) for sampling. However, this solution is relatively expensive. Therefore, reducing the cost of power battery current monitoring is a pressing issue. Summary of the Invention

[0003] The embodiments of the present application provide a power battery current monitoring method, device, equipment and medium, which solves the technical problem that the safety monitoring of power batteries in the prior art is mainly implemented by using two current sensors, but the cost of this solution is relatively high, and achieves the technical effect of reducing the current monitoring cost of power batteries.

[0004] In a first aspect, the present application provides a method for monitoring current of a power battery, the method comprising:

[0005] When the vehicle is in a high-voltage state, collecting the original current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency;

[0006] Each moment corresponding to the preset frequency during the time period when the vehicle is in the upper high-voltage state is sequentially used as a target moment, and the following steps are sequentially performed for each target moment:

[0007] Determining, based on the original currents corresponding to the high-voltage accessories, the accessory currents corresponding to the high-voltage accessories at the target time;

[0008] taking the sum of the accessory currents corresponding to the high-voltage accessories at the target time as the first total current of the power battery at the target time;

[0009] collecting, from a current sensor connected to the power battery, a second total current of the power battery corresponding to the target time;

[0010] An actual total current of the power battery corresponding to the target time is determined according to respective corresponding availabilities of the first total current and the second total current and a current difference between the first total current and the second total current.

[0011] Furthermore, determining the accessory current corresponding to each high-voltage accessory at the target time based on the original current corresponding to each high-voltage accessory includes:

[0012] Determine, based on the time-varying trends of the three raw currents collected by each high-voltage accessory at the target moment and the most recent moment and the most recent moment, the peak current and the valley current of the three raw currents corresponding to each high-voltage accessory;

[0013] When the original current corresponding to at least one first target high-voltage accessory among the high-voltage accessories at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to the first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time;

[0014] When the original current corresponding to at least one second target high-voltage accessory among the high-voltage accessories at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time;

[0015] When the original current corresponding to each of the high-voltage accessories at the target time is not the peak current or the valley current, the original current corresponding to each of the high-voltage accessories at the target time is used as the accessory current corresponding to each of the high-voltage accessories at the target time.

[0016] Furthermore, the high-voltage accessories connected to the power battery in the vehicle include at least the front electric drive, rear electric drive, on-board charger and heater of the vehicle.

[0017] Furthermore, determining the accessory current corresponding to each high-voltage accessory at the target time based on the original current corresponding to each high-voltage accessory includes:

[0018] determining the original currents of the onboard charger and the heater of the vehicle corresponding to the target time as the accessory currents of the onboard charger and the heater corresponding to the target time;

[0019] determining, according to time-varying trends of the three raw currents of the front electric drive and the rear electric drive collected at the target moment and the most recent moment and the most recent moment before the target moment, peak currents and valley currents of the three raw currents corresponding to the front electric drive and the rear electric drive, respectively;

[0020] When the original current corresponding to at least one first target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time;

[0021] When the original current corresponding to at least one second target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time;

[0022] When the original currents corresponding to the front electric drive and the rear electric drive at the target time are neither the peak current nor the valley current, the original currents corresponding to the front electric drive and the rear electric drive at the target time are respectively used as the accessory currents corresponding to the front electric drive and the rear electric drive at the target time.

[0023] Furthermore, determining the actual total current of the power battery corresponding to the target time according to the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current includes:

[0024] In a case where both the first total current and the second total current are valid, determining the current difference between the first total current and the second total current;

[0025] When the absolute value of the current difference is less than a preset current value, determining the second total current as the actual total current of the power battery corresponding to the target time;

[0026] When the absolute value of the current difference is greater than or equal to the preset current value, it is determined that neither the first total current nor the second total current is the actual total current corresponding to the power battery at the target time, and the output power of the power battery is controlled to be reduced to a first preset power.

[0027] Furthermore, determining the actual total current of the power battery corresponding to the target time according to the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current includes:

[0028] When the first total current is valid and the second total current is invalid, determining the first total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a second preset power;

[0029] When the first total current is invalid and the second total current is valid, determining the second total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a third preset power;

[0030] In a case where both the first total current and the second total current are invalid, it is determined that neither the first total current nor the second total current is an actual total current corresponding to the power battery at the target time.

[0031] Furthermore, before determining the accessory current corresponding to each of the high-voltage accessories at the target time based on the original current corresponding to each of the high-voltage accessories, the method further includes:

[0032] The original current corresponding to each of the high-voltage accessories at the target time is filtered and cyclic redundancy checked.

[0033] In a second aspect, the present application provides a power battery current monitoring device, the device comprising:

[0034] A high-voltage accessory current acquisition module is used to collect the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency when the vehicle is in the high-voltage state;

[0035] A loop module is configured to sequentially use each moment corresponding to the preset frequency during the time period when the vehicle is in the upper high-voltage state as a target moment, and sequentially perform the following steps for each target moment:

[0036] Determining, based on the original currents corresponding to the high-voltage accessories, the accessory currents corresponding to the high-voltage accessories at the target time;

[0037] taking the sum of the accessory currents corresponding to the high-voltage accessories at the target time as the first total current of the power battery at the target time;

[0038] collecting, from a current sensor connected to the power battery, a second total current of the power battery corresponding to the target time;

[0039] An actual total current of the power battery corresponding to the target time is determined according to respective corresponding availabilities of the first total current and the second total current and a current difference between the first total current and the second total current.

[0040] Furthermore, the loop module is used to:

[0041] Determine, based on the time-varying trends of the three raw currents collected by each high-voltage accessory at the target moment and the most recent moment and the most recent moment, the peak current and the valley current of the three raw currents corresponding to each high-voltage accessory;

[0042] When the original current corresponding to at least one first target high-voltage accessory among the high-voltage accessories at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to the first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time;

[0043] When the original current corresponding to at least one second target high-voltage accessory among the high-voltage accessories at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time;

[0044] When the original current corresponding to each of the high-voltage accessories at the target time is not the peak current or the valley current, the original current corresponding to each of the high-voltage accessories at the target time is used as the accessory current corresponding to each of the high-voltage accessories at the target time.

[0045] Furthermore, the high-voltage accessories connected to the power battery in the vehicle include at least the front electric drive, rear electric drive, on-board charger and heater of the vehicle.

[0046] Furthermore, the loop module is used to:

[0047] determining the original currents of the onboard charger and the heater of the vehicle corresponding to the target time as the accessory currents of the onboard charger and the heater corresponding to the target time;

[0048] determining, according to time-varying trends of the three raw currents of the front electric drive and the rear electric drive collected at the target moment and the most recent moment and the most recent moment before the target moment, peak currents and valley currents of the three raw currents corresponding to the front electric drive and the rear electric drive, respectively;

[0049] When the original current corresponding to at least one first target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time;

[0050] When the original current corresponding to at least one second target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time;

[0051] When the original currents corresponding to the front electric drive and the rear electric drive at the target time are neither the peak current nor the valley current, the original currents corresponding to the front electric drive and the rear electric drive at the target time are respectively used as the accessory currents corresponding to the front electric drive and the rear electric drive at the target time.

[0052] Furthermore, the loop module is used to:

[0053] In a case where both the first total current and the second total current are valid, determining the current difference between the first total current and the second total current;

[0054] When the absolute value of the current difference is less than a preset current value, determining the second total current as the actual total current of the power battery corresponding to the target time;

[0055] When the absolute value of the current difference is greater than or equal to the preset current value, it is determined that neither the first total current nor the second total current is the actual total current corresponding to the power battery at the target time, and the output power of the power battery is controlled to be reduced to a first preset power.

[0056] Furthermore, the loop module is used to:

[0057] When the first total current is valid and the second total current is invalid, determining the first total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a second preset power;

[0058] When the first total current is invalid and the second total current is valid, determining the second total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a third preset power;

[0059] In a case where both the first total current and the second total current are invalid, it is determined that neither the first total current nor the second total current is an actual total current corresponding to the power battery at the target time.

[0060] Furthermore, the current preprocessing module is used to:

[0061] Before determining the accessory current corresponding to each high-voltage accessory at the target time based on the original current corresponding to each high-voltage accessory, filtering and cyclic redundancy check are performed on the original current corresponding to each high-voltage accessory at the target time.

[0062] In a third aspect, the present application provides an electronic device, comprising:

[0063] processor;

[0064] a memory for storing instructions executable by the processor;

[0065] The processor is configured to execute to implement a power battery current monitoring method provided in the first aspect.

[0066] In a fourth aspect, the present application provides a non-temporary computer-readable storage medium. When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to implement a power battery current monitoring method as provided in the first aspect.

[0067] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0068] In an embodiment of the present application, when a vehicle is in a high-voltage state, the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle is collected at a preset frequency. For each target moment corresponding to the preset frequency during the time period when the vehicle is in the high-voltage state, the accessory current corresponding to each high-voltage accessory at the target moment is determined based on the raw current corresponding to each high-voltage accessory. The sum of the accessory currents corresponding to each high-voltage accessory at the target moment is used as the first total current of the power battery at the target moment. A second total current of the power battery at the target moment is collected from a current sensor connected to the power battery. The actual total current of the power battery at the target moment is determined based on the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current. This embodiment of the present application eliminates the analog Hall current sensor used in related art and instead uses the sum of the accessory currents of each high-voltage accessory and a current sensor (such as a digital shunt) to monitor the current safety of the power battery. This eliminates the analog Hall current sensor and eliminates the need for additional sensors or equipment. This reduces the cost of current monitoring the power battery while still enabling current safety monitoring of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0070] Figure 1 A schematic diagram of a flow chart of a power battery current monitoring method provided in an embodiment of the present application;

[0071] Figure 2 A schematic diagram of a power battery current monitoring architecture provided in an embodiment of the present application;

[0072] Figure 3 A schematic structural diagram of a power battery current monitoring device provided in an embodiment of the present application;

[0073] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0074] The embodiments of the present application provide a power battery current monitoring method, which solves the technical problem that the safety monitoring of power batteries in the prior art is mainly implemented by using two current sensors, but this solution has relatively high costs.

[0075] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0076] In an embodiment of the present application, when a vehicle is in a high-voltage state, the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle is collected at a preset frequency. For each target moment corresponding to the preset frequency during the time period when the vehicle is in the high-voltage state, the accessory current corresponding to each high-voltage accessory at the target moment is determined based on the raw current corresponding to each high-voltage accessory. The sum of the accessory currents corresponding to each high-voltage accessory at the target moment is used as the first total current of the power battery at the target moment. A second total current of the power battery at the target moment is collected from a current sensor connected to the power battery. The actual total current of the power battery at the target moment is determined based on the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current. This embodiment of the present application eliminates the analog Hall current sensor used in related art and instead uses the sum of the accessory currents of each high-voltage accessory and a current sensor (such as a digital shunt) to monitor the current safety of the power battery. This eliminates the analog Hall current sensor and eliminates the need for additional sensors or equipment. This reduces the cost of current monitoring the power battery while still enabling current safety monitoring of the power battery.

[0077] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0078] First, the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0079] The present application provides a method for monitoring the current of a power battery. Figure 1 As shown, the method includes step S11-step S12. The power battery current monitoring method provided in the embodiment of the present application can be executed by a relevant controller of the power battery. The specific method can be selected according to actual conditions, and the embodiment of the present application does not limit this.

[0080] Step S11, when the vehicle is in a high-voltage state, collecting the original current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency;

[0081] Step S12, taking each moment corresponding to the preset frequency during the time period when the vehicle is in the upper high-voltage state as a target moment, and performing the following steps for each target moment:

[0082] Step S121, determining the accessory current corresponding to each of the high-voltage accessories at the target time according to the original current corresponding to each of the high-voltage accessories;

[0083] Step S122, taking the sum of the accessory currents corresponding to the high-voltage accessories at the target time as the first total current of the power battery corresponding to the target time;

[0084] Step S123, collecting a second total current of the power battery corresponding to the target time from a current sensor connected to the power battery;

[0085] Step S124 : determining an actual total current of the power battery at the target time according to the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current.

[0086] Regarding step S11, when the vehicle is in the upper high-voltage state, the original current corresponding to each high-voltage accessory connected to the power battery in the vehicle is collected according to a preset frequency.

[0087] After the vehicle receives the upper high-voltage signal generated by the user trigger, the vehicle enters the upper high-voltage state.

[0088] For all types of vehicles, the various high-voltage accessories connected to the power battery in the vehicle include at least the front electric drive, rear electric drive, on-board charger and heater of the vehicle. Among them, the front electric drive in the embodiment of the present application refers to the front motor, and the rear electric drive refers to the rear motor. For relatively special types of vehicles, the various high-voltage accessories connected to the power battery in the vehicle may include other types of high-voltage accessories in addition to the front electric drive, rear electric drive, on-board charger and heater. For example, the high-voltage accessories in a hybrid car also include a generator. Therefore, the high-voltage accessories mentioned in the embodiment of the present application can be adjusted according to the different types of specific vehicles. The embodiment of the present application only takes a vehicle including only high-voltage accessories such as the front electric drive, rear electric drive, on-board charger and heater as an example for subsequent explanation.

[0089] When the vehicle is in the high-voltage state, the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle is collected at a preset frequency. The preset frequency can be set according to actual conditions. For example, the preset frequency can be set to a frequency less than 10ms. For example, when the preset frequency is 5ms, the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle is collected every 5ms.

[0090] Regarding step S12, each moment corresponding to the preset frequency during the time period when the vehicle is in the upper high-voltage state is sequentially used as a target moment, and the following steps S121 to S124 are sequentially performed for each target moment.

[0091] After collecting the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency, the target time is determined sequentially according to the preset frequency, and steps S121-S124 are sequentially executed for each target time until the vehicle receives the low-voltage signal. In other words, during the entire process of the vehicle being in the high-voltage state, the time period is divided according to the preset frequency, and the time corresponding to each division is sequentially used as the target time and steps S121-S124 are sequentially executed until the vehicle receives the low-voltage signal.

[0092] After acquiring the original signal, the original current corresponding to each high-voltage accessory at the target time can be filtered and cyclic redundancy checked. The accuracy of the filtering process can be set according to actual conditions, for example, the accuracy can be retained to 0.01A.

[0093] In addition, the validity of the original current corresponding to each high-voltage accessory at the target time can be determined based on the cyclic redundancy check result of the original current corresponding to each high-voltage accessory at the target time. In actual operation, the validity can be represented by a validity flag, for example, 0 indicates valid and 1 indicates invalid.

[0094] Regarding step S121, the accessory current corresponding to each of the high-voltage accessories at the target time is determined based on the original current corresponding to each of the high-voltage accessories.

[0095] Among the high-voltage accessories connected to the power battery, the front and rear electric drives draw larger currents and experience greater current fluctuations, while other high-voltage accessories, such as the onboard charger and heater, draw relatively smaller currents and experience less current fluctuations. In light of this reality, the present embodiment provides two different methods for implementing step S121.

[0096] Method 1 includes steps S12111 to S12114. Method 1 does not distinguish between the current sizes and current fluctuation characteristics of each high-voltage accessory. Instead, it synchronizes the data of each original current according to the characteristics of current fluctuation of each high-voltage accessory, aligns the time deviation of the original current of each high-voltage accessory, and then determines the accessory current corresponding to each high-voltage accessory at the target time.

[0097] Method 2 includes steps S12121-S12125. Unlike Method 1, Method 2 distinguishes between the current magnitude and current fluctuation characteristics of each high-voltage accessory. For the front and rear electric drives with large currents and large fluctuations, the raw currents of the front and rear electric drives are synchronized and time-aligned. For other high-voltage accessories with smaller currents and smaller fluctuations, such as on-board chargers and heaters, the corresponding raw currents are directly used as the accessory current of the high-voltage accessory.

[0098] [Method 1] includes steps S12111 to S12114.

[0099] Step S12111, determining peak currents and trough currents of the three raw currents corresponding to each high-voltage accessory based on time-varying trends of the three raw currents collected by each high-voltage accessory at the target time and at the most recent and last moments before the target time;

[0100] Step S12112: When the original current corresponding to at least one first target high-voltage accessory among the high-voltage accessories at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time.

[0101] Step S12113: When the original current corresponding to at least one second target high-voltage accessory among the high-voltage accessories at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories other than the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time.

[0102] Step S12114: When the original current corresponding to each of the high-voltage accessories at the target time is not the peak current or the valley current, the original current corresponding to each of the high-voltage accessories at the target time is used as the accessory current corresponding to each of the high-voltage accessories at the target time.

[0103] For each high-voltage accessory, based on the relationship between the size of the three most recently collected original currents corresponding to the target moment (including the original currents collected at the target moment, the previous moment, and the previous moment), the peaks and troughs of the currents in the time period corresponding to the three original currents are determined, and the original current corresponding to the peak is recorded as the peak current. Similarly, the original current corresponding to the trough is recorded as the trough current. Among them, the previous moment is the most recent collection moment corresponding to before the target moment, and the previous moment is the most recent collection moment corresponding to before the previous moment. For example, if the preset frequency is 5ms and the target moment is the current moment, then the previous moment is the moment 5ms back from the current moment, and the previous moment is the moment 10ms back from the current moment.

[0104] The target time is the current time. The raw current of each high-voltage accessory at the target time may be peak current, valley current, or neither peak current nor valley current. Based on the target time, if the raw current corresponding to a high-voltage accessory at the target time is peak current, the target time and raw current of the high-voltage accessory are used as the reference, and the raw current of the high-voltage accessory at the target time is used as the accessory current of the high-voltage accessory. At the same time, the peak currents of other high-voltage accessories are aligned with the target current, that is, the peak currents of other high-voltage accessories are adjusted to the accessory currents corresponding to the respective high-voltage accessories at the target time.

[0105] Similarly, taking the target time as the benchmark, when the original current corresponding to a certain high-voltage accessory at the target time is the valley current, the target time and original current of the high-voltage accessory are used as the benchmark, and the original current of the high-voltage accessory at the target time is used as the accessory current of the high-voltage accessory. At the same time, the valley currents of other high-voltage accessories are aligned with it, that is, the valley currents of other high-voltage accessories are adjusted to their corresponding accessory currents at the target time.

[0106] When the original current corresponding to each of the high-voltage accessories at the target time is not the peak current or the valley current, the original current corresponding to each of the high-voltage accessories at the target time can be used as the accessory current corresponding to each of the high-voltage accessories at the target time.

[0107] [Method 2] includes steps S12121 to S12125.

[0108] Step S12121: Determine the original currents of the onboard charger and the heater of the vehicle at the target time as the accessory currents of the onboard charger and the heater at the target time.

[0109] Step S12122, determining peak currents and valley currents of the three raw currents corresponding to the front electric drive and the rear electric drive, respectively, based on time-varying trends of the three raw currents collected at the target moment and the immediately preceding moment and the immediately preceding moment closest to the target moment;

[0110] Step S12123: When the original current corresponding to at least one first target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time.

[0111] Step S12124: When the original current corresponding to at least one second target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories other than the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time.

[0112] Step S12125, when the original currents corresponding to the front electric drive and the rear electric drive at the target time are neither the peak current nor the valley current, the original currents corresponding to the front electric drive and the rear electric drive at the target time are respectively used as the accessory currents corresponding to the front electric drive and the rear electric drive at the target time.

[0113] The principle of determining the peak current of the front electric drive and the rear electric drive at the peak moment and the valley current at the valley moment in the second method is the same as that of the aforementioned first method and will not be repeated here.

[0114] The difference between the second method and the first method is that the second method directly uses the original current of the on-board charger and the heater at the target time as the accessory current of the on-board charger and the heater at the target time, which ignores the current fluctuation characteristics of the on-board charger and the heater.

[0115] Comparing Method 1 with Method 2, Method 1 demonstrates greater accuracy in determining the accessory current of each high-voltage accessory, while Method 2 demonstrates greater efficiency in determining the accessory current of each high-voltage accessory. In actual operation, the appropriate method for determining the accessory current of each high-voltage accessory can be selected from Method 1 or Method 2 based on actual requirements for accuracy and efficiency, and this embodiment of the present application does not impose any limitation on this.

[0116] Regarding step S122, the sum of the accessory currents corresponding to the various high-voltage accessories at the target time is used as the first total current corresponding to the power battery at the target time.

[0117] The accessory currents corresponding to the high-voltage accessories at the target time are added together, and the sum is used as the first total current of the power battery corresponding to the target time. The first total current is equivalent to the sum of the currents provided by the power battery to the high-voltage accessories at the target time.

[0118] As previously mentioned, in this embodiment of the present application, the validity of the original current corresponding to each high-voltage accessory at the target time is determined based on the cyclic redundancy check result of the original current corresponding to each high-voltage accessory at the target time. Furthermore, the validity of the first total current can be determined based on the validity of the accessory current corresponding to each high-voltage accessory at the target time.

[0119] If the accessory currents corresponding to the high-voltage accessories at the target time are all valid, the first total current is considered valid. If at least one of the accessory currents corresponding to the high-voltage accessories at the target time is invalid, the first total current is considered invalid.

[0120] Regarding step S123 , a second total current of the power battery corresponding to the target time is collected from a current sensor connected to the power battery.

[0121] Step S123 may be performed simultaneously with step S11, or step S123 may be performed simultaneously with steps S121 to S122. The current sensor in the embodiment of the present application may be a digital shunt.

[0122] The second total current is the sum of the currents supplied by the power battery to various high-voltage accessories. When the power battery is operating normally, the difference between the first and second total currents should be within a reasonable range. If the difference between the first and second total currents is not within this range, it indicates that the power battery is operating abnormally, or that the first or second total current measurements are incorrect.

[0123] In order to determine whether the power battery has an abnormality at the target time, and to determine the actual total current of the power battery at the target time, step S124 is continued to be executed.

[0124] Regarding step S124 , the actual total current of the power battery at the target time is determined according to the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current.

[0125] The validity of each of the first total current and the second total current can be determined according to the validity flag bits corresponding to each of the first total current and the second total current.

[0126] When both the first total current and the second total current are valid, steps S12411 to S12413 may be continued.

[0127] Step S12411, determining the current difference between the first total current and the second total current;

[0128] Step S12412: When the absolute value of the current difference is less than a preset current value, determining the second total current as the actual total current of the power battery corresponding to the target time;

[0129] Step S12413: When the absolute value of the current difference is greater than or equal to the preset current value, determine that neither the first total current nor the second total current is the actual total current corresponding to the power battery at the target time, and control the output power of the power battery to be reduced to a first preset power.

[0130] The preset current value is used to judge whether the current difference between the first total current and the second total current is within a reasonable range. The specific current value can be determined according to actual needs. For example, when the accuracy requirement is high, the preset current value can be set to a smaller value.

[0131] When both the first total current and the second total current are valid, the current difference between the first total current and the second total current is calculated. If the absolute value of the difference between the two is less than the preset current value, it confirms that both the first total current and the second total current are normal. The first total current or the second total current can be determined as the actual total current corresponding to the power battery at the target time.

[0132] If the absolute value of the difference between the two is greater than or equal to a preset current value, confirming that at least one of the first total current and the second total current is abnormal, then neither the first total current nor the second total current is the actual total current of the power battery at the target time. In this case, to improve vehicle safety, the output power of the power battery can be controlled to be reduced to a first preset power. The first preset power can be 60-90%, for example, 80%.

[0133] In the case that at least one of the first total current and the second total current is invalid, steps S12421 to S12423 may be continued.

[0134] Step S12421: When the first total current is valid and the second total current is invalid, determining the first total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a second preset power;

[0135] Step S12422: When the first total current is invalid and the second total current is valid, determining the second total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a third preset power;

[0136] Step S12423: When both the first total current and the second total current are invalid, determine that neither the first total current nor the second total current is the actual total current corresponding to the power battery at the target time.

[0137] When only one of the first total current and the second total current is valid, the valid current is determined as the actual total current corresponding to the power battery at the target time, and the output power of the power battery is controlled to decrease.

[0138] For example, when only the first total current is valid, the first total current is used as the actual total current of the power battery at the target time, and the output power of the power battery is controlled to be reduced to a second preset power, which may be 40-60%, for example, 50%.

[0139] When only the second total current is valid, the second total current is used as the actual total current of the power battery at the target time, and the output power of the power battery is controlled to be reduced to a third preset power, which may be 40-60%, for example, 50%.

[0140] In summary, the present embodiment, when a vehicle is in a high-voltage state, collects the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency. For each target moment corresponding to the preset frequency during the period when the vehicle is in the high-voltage state, the accessory current corresponding to each high-voltage accessory at the target moment is determined based on the raw current corresponding to each high-voltage accessory. The sum of the accessory currents corresponding to each high-voltage accessory at the target moment is used as the first total current of the power battery at the target moment. A second total current of the power battery at the target moment is collected from a current sensor connected to the power battery. The actual total current of the power battery at the target moment is determined based on the respective validity of the first and second total currents and the current difference between the first and second total currents. This eliminates the analog Hall effect current sensor used in related art and instead uses the sum of the accessory currents of each high-voltage accessory and a current sensor (such as a digital shunt) to monitor the current safety of the power battery. This eliminates the analog Hall effect current sensor and eliminates the need for additional sensors or equipment. This reduces the cost of current monitoring for the power battery while still ensuring current safety.

[0141] In addition, since the analog Hall current sensor is eliminated, the workload of functional safety development of the battery management system caused by the analog Hall sensor is reduced, and the functional development efficiency of the battery management system of the power battery is improved.

[0142] In order to further illustrate the above-mentioned solution provided in the embodiments of the present application, the following specific examples are provided.

[0143] like Figure 2 As shown in the figure, the battery pack (that is, the power battery) of a certain vehicle is connected to five high-voltage accessories, namely the front electric drive, the rear electric drive, the PTC (Positive Temperature Coefficient heater), the OBC (On Board Charger), and the GCU (Generator Control Unit).

[0144] For a specific target moment, I1 is the second total current detected by a current sensor (such as a digital shunt), I3 is the current corresponding to the front electric drive, I4 is the current corresponding to the rear electric drive, I5 is the current corresponding to the PTC, I6 is the current corresponding to the OBC, and I7 is the current corresponding to the GCU. I2 is the sum of I3, I4, I5, I6, and I7.

[0145] After the vehicle is connected to high voltage, the BMS (Battery Management System) receives real-time current from other high-voltage components of the vehicle, including I3, I4, I5, I6, and I7, via the CAN bus. The current values ​​corresponding to each high-voltage accessory undergo conventional filtering, retaining accuracy to 0.01A. A CRC check is added during transmission to the CAN bus to prevent tampering of the CAN network data, and a current valid flag is also transmitted. The current acquisition cycle for each high-voltage component is required to be less than 10ms, and the transmission cycle to the CAN bus is 10ms.

[0146] The accessory current of each high-voltage accessory is determined according to the first or second method involved in step S121, and then I2 can be obtained.

[0147] Compare I1 and I2 to perform current functional safety verification. Functional safety verification process and processing results:

[0148] When both I1 and I2 are valid and |I1-I2| < Iq (preset current value), I1 serves as the current value for the power battery system, and the vehicle operates normally. The validity of I1 can be determined by the digital shunt's fault status and its built-in CRC checksum. The validity of I2 is determined by the CRC values ​​of I3, I4, I5, I6, and I7, as well as the valid current flags. Iq is a fixed threshold that is related to the accuracy of the two current sensors.

[0149] When both I1 and I2 are valid and |I1-I2|≥Iq, both I1 and I2 are deemed unreliable and the vehicle is reduced to 80% power.

[0150] I1 is valid, I2 is invalid, I1 is used as the current value of the power battery system, and the vehicle is used with 50% reduced power;

[0151] I1 is invalid, I2 is valid, I2 is used as the current value of the power battery system, and the vehicle is used with 50% reduced power;

[0152] Both I1 and I2 are invalid. In this case, both I1 and I2 are determined to be unreliable, and the vehicle cannot be used.

[0153] The above process is repeated until the vehicle stops and the high pressure is lowered. When the vehicle is put on the high pressure again next time, the above process is repeated.

[0154] It can be seen that the embodiment of the present application adopts the solution of replacing the second current sensor with the current collected by various high-voltage accessories of the vehicle, which can effectively reduce the cost and development workload of the battery pack to meet the current functional safety requirements.

[0155] Based on the same inventive concept, the present application provides the following embodiments: Figure 3A power battery current monitoring device is shown, the device comprising:

[0156] The high-voltage accessory current acquisition module 31 is used to acquire the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency when the vehicle is in the high-voltage state;

[0157] The loop module 32 is configured to sequentially use each moment corresponding to the preset frequency during the time period when the vehicle is in the upper high-voltage state as a target moment, and sequentially perform the following steps for each target moment:

[0158] Determining, based on the original currents corresponding to the high-voltage accessories, the accessory currents corresponding to the high-voltage accessories at the target time;

[0159] taking the sum of the accessory currents corresponding to the high-voltage accessories at the target time as the first total current of the power battery at the target time;

[0160] collecting, from a current sensor connected to the power battery, a second total current of the power battery corresponding to the target time;

[0161] An actual total current of the power battery corresponding to the target time is determined according to respective corresponding availabilities of the first total current and the second total current and a current difference between the first total current and the second total current.

[0162] Furthermore, the loop module 32 is configured to:

[0163] Determine, based on the time-varying trends of the three raw currents collected by each high-voltage accessory at the target moment and the most recent moment and the most recent moment, the peak current and the valley current of the three raw currents corresponding to each high-voltage accessory;

[0164] When the original current corresponding to at least one first target high-voltage accessory among the high-voltage accessories at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to the first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time;

[0165] When the original current corresponding to at least one second target high-voltage accessory among the high-voltage accessories at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time;

[0166] When the original current corresponding to each of the high-voltage accessories at the target time is not the peak current or the valley current, the original current corresponding to each of the high-voltage accessories at the target time is used as the accessory current corresponding to each of the high-voltage accessories at the target time.

[0167] Furthermore, the high-voltage accessories connected to the power battery in the vehicle include at least the front electric drive, rear electric drive, on-board charger and heater of the vehicle.

[0168] Furthermore, the loop module 32 is configured to:

[0169] determining the original currents of the onboard charger and the heater of the vehicle corresponding to the target time as the accessory currents of the onboard charger and the heater corresponding to the target time;

[0170] determining, according to time-varying trends of the three raw currents of the front electric drive and the rear electric drive collected at the target moment and the most recent moment and the most recent moment before the target moment, peak currents and valley currents of the three raw currents corresponding to the front electric drive and the rear electric drive, respectively;

[0171] When the original current corresponding to at least one first target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time;

[0172] When the original current corresponding to at least one second target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time;

[0173] When the original currents corresponding to the front electric drive and the rear electric drive at the target time are neither the peak current nor the valley current, the original currents corresponding to the front electric drive and the rear electric drive at the target time are respectively used as the accessory currents corresponding to the front electric drive and the rear electric drive at the target time.

[0174] Furthermore, the loop module 32 is configured to:

[0175] In a case where both the first total current and the second total current are valid, determining the current difference between the first total current and the second total current;

[0176] When the absolute value of the current difference is less than a preset current value, determining the second total current as the actual total current of the power battery corresponding to the target time;

[0177] When the absolute value of the current difference is greater than or equal to the preset current value, it is determined that neither the first total current nor the second total current is the actual total current corresponding to the power battery at the target time, and the output power of the power battery is controlled to be reduced to a first preset power.

[0178] Furthermore, the loop module 32 is configured to:

[0179] When the first total current is valid and the second total current is invalid, determining the first total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a second preset power;

[0180] When the first total current is invalid and the second total current is valid, determining the second total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a third preset power;

[0181] In a case where both the first total current and the second total current are invalid, it is determined that neither the first total current nor the second total current is an actual total current corresponding to the power battery at the target time.

[0182] Furthermore, the current preprocessing module is used to:

[0183] Before determining the accessory current corresponding to each high-voltage accessory at the target time based on the original current corresponding to each high-voltage accessory, filtering and cyclic redundancy check are performed on the original current corresponding to each high-voltage accessory at the target time.

[0184] Based on the same inventive concept, the present application provides the following embodiments: Figure 4 An electronic device as shown includes:

[0185] Processor 41;

[0186] a memory 42 for storing instructions executable by the processor 41;

[0187] The processor 41 is configured to execute to implement a power battery current monitoring method as provided above.

[0188] Based on the same inventive concept, an embodiment of the present application provides a non-temporary computer-readable storage medium. When the instructions in the storage medium are executed by the processor 41 of the electronic device, the electronic device is enabled to implement a power battery current monitoring method as provided above.

[0189] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiment of this application, based on the information processing method described in the embodiment of this application, those skilled in the art will be able to understand the specific implementation of the electronic device of this embodiment and its various variations, so how the electronic device implements the method in the embodiment of this application will not be described in detail here. As long as those skilled in the art implement the electronic device used by the information processing method in the embodiment of this application, it falls within the scope of protection to be provided by this application.

[0190] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0191] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0192] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0193] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0194] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0195] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A power battery current monitoring method, characterized in that: The method comprises: When the vehicle is in a high-voltage state, collecting the original current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency; Each moment corresponding to the preset frequency during the time period when the vehicle is in the upper high-voltage state is sequentially used as a target moment, and the following steps are sequentially performed for each target moment: Determining, based on the original currents corresponding to the high-voltage accessories, the accessory currents corresponding to the high-voltage accessories at the target time; taking the sum of the accessory currents corresponding to the high-voltage accessories at the target time as the first total current of the power battery at the target time; collecting, from a current sensor connected to the power battery, a second total current of the power battery corresponding to the target time; An actual total current of the power battery corresponding to the target time is determined according to respective validity of the first total current and the second total current and a current difference between the first total current and the second total current.

2. The method according to claim 1, wherein The determining, based on the original currents corresponding to the high-voltage accessories, the accessory currents corresponding to the high-voltage accessories at the target time, includes: Determine, based on the time-varying trends of the three raw currents collected by each high-voltage accessory at the target moment and the most recent moment and the most recent moment, the peak current and the valley current of the three raw currents corresponding to each high-voltage accessory; When the original current corresponding to at least one first target high-voltage accessory among the high-voltage accessories at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to the first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time; When the original current corresponding to at least one second target high-voltage accessory among the high-voltage accessories at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time; When the original current corresponding to each of the high-voltage accessories at the target time is not the peak current or the valley current, the original current corresponding to each of the high-voltage accessories at the target time is used as the accessory current corresponding to each of the high-voltage accessories at the target time.

3. The method according to claim 1, wherein The high-voltage accessories connected to the power battery in the vehicle include at least the front electric drive, rear electric drive, on-board charger and heater of the vehicle.

4. The method according to claim 3, wherein The determining, based on the original currents corresponding to the high-voltage accessories, the accessory currents corresponding to the high-voltage accessories at the target time, includes: determining the original currents of the onboard charger and the heater of the vehicle corresponding to the target time as the accessory currents of the onboard charger and the heater corresponding to the target time; determining, according to time-varying trends of the three raw currents of the front electric drive and the rear electric drive collected at the target moment and the most recent moment and the most recent moment before the target moment, peak currents and valley currents of the three raw currents corresponding to the front electric drive and the rear electric drive, respectively; When the original current corresponding to at least one first target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the peak current, the original current corresponding to the first target high-voltage accessory at the target time is used as the accessory current corresponding to the first target high-voltage accessory at the target time, and the peak currents corresponding to first other high-voltage accessories other than the first target high-voltage accessory are used as the accessory current corresponding to each of the first other high-voltage accessories at the target time; When the original current corresponding to at least one second target high-voltage accessory in the front electric drive and the rear electric drive at the target time is the valley current, the original current corresponding to the second target high-voltage accessory at the target time is used as the accessory current corresponding to the second target high-voltage accessory at the target time, and the valley currents corresponding to the second other high-voltage accessories except the second target high-voltage accessory are used as the accessory current corresponding to each of the second other high-voltage accessories at the target time; When the original currents corresponding to the front electric drive and the rear electric drive at the target time are neither the peak current nor the valley current, the original currents corresponding to the front electric drive and the rear electric drive at the target time are respectively used as the accessory currents corresponding to the front electric drive and the rear electric drive at the target time.

5. The method according to claim 1, wherein The determining, based on the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current, the actual total current of the power battery corresponding to the target time includes: In a case where both the first total current and the second total current are valid, determining the current difference between the first total current and the second total current; When the absolute value of the current difference is less than a preset current value, determining the second total current as the actual total current of the power battery corresponding to the target time; When the absolute value of the current difference is greater than or equal to the preset current value, it is determined that neither the first total current nor the second total current is the actual total current corresponding to the power battery at the target time, and the output power of the power battery is controlled to be reduced to a first preset power.

6. The method according to claim 1, wherein The determining, based on the respective validity of the first total current and the second total current and the current difference between the first total current and the second total current, the actual total current of the power battery corresponding to the target time includes: When the first total current is valid and the second total current is invalid, determining the first total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a second preset power; When the first total current is invalid and the second total current is valid, determining the second total current as the actual total current of the power battery at the target time, and controlling the output power of the power battery to decrease to a third preset power; In a case where both the first total current and the second total current are invalid, it is determined that neither the first total current nor the second total current is an actual total current corresponding to the power battery at the target time.

7. The method according to claim 1, wherein Before determining the accessory current corresponding to each high-voltage accessory at the target time based on the original current corresponding to each high-voltage accessory, the method further includes: The original current corresponding to each of the high-voltage accessories at the target time is filtered and cyclic redundancy checked.

8. A power battery current monitoring device, characterized in that: The device comprises: A high-voltage accessory current acquisition module is used to collect the raw current corresponding to each high-voltage accessory connected to the power battery in the vehicle at a preset frequency when the vehicle is in the high-voltage state; A loop module is configured to sequentially use each moment corresponding to the preset frequency during the time period when the vehicle is in the upper high-voltage state as a target moment, and sequentially perform the following steps for each target moment: Determining, based on the original currents corresponding to the high-voltage accessories, the accessory currents corresponding to the high-voltage accessories at the target time; taking the sum of the accessory currents corresponding to the high-voltage accessories at the target time as the first total current of the power battery at the target time; collecting, from a current sensor connected to the power battery, a second total current of the power battery corresponding to the target time; An actual total current of the power battery corresponding to the target time is determined according to respective validity of the first total current and the second total current and a current difference between the first total current and the second total current.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute to implement a power battery current monitoring method according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, which, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to implement a power battery current monitoring method according to any one of claims 1 to 7.

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