Methods, devices, equipment, and vehicles for handling battery temperature sampling disconnection faults.

Abstract

This invention discloses a method, apparatus, device, and vehicle for handling battery temperature sampling disconnection faults. When a battery temperature sampling disconnection fault is detected in the power battery system, the number of disconnected temperature sampling lines is obtained. When the number of disconnected lines is less than or equal to a preset number, the current highest temperature of a single cell in the power battery is detected. When the difference between a first temperature fault threshold and the current highest temperature of a single cell is greater than or equal to a first preset temperature, the current lowest temperature of a single cell in the power battery is detected. When the difference between the current lowest temperature of a single cell and a second temperature fault threshold is greater than or equal to a second preset temperature, it is determined whether the current highest and lowest temperatures of a single cell are within a preset temperature range. When it is determined that both the current highest and lowest temperatures of a single cell are outside the preset temperature range, the charging and discharging current is limited to a first preset current value. This method can ensure the normal and safe operation of the vehicle and balance system safety and operational efficiency.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and in particular to a method, apparatus, equipment, and vehicle for handling battery temperature sampling disconnection faults. Background Technology

[0002] New energy commercial vehicles are generally equipped with power battery systems with high energy density and high voltage platform under complex operating environments and high load conditions.

[0003] To meet energy supply demands, a large number of individual battery cells are typically integrated into a system through series and parallel connections. During this process, precise thermal management monitoring plays a crucial role in maintaining the cells within their safe operating temperature range.

[0004] In current technical solutions, when a temperature acquisition line experiences a disconnection, the Battery Management System (BMS) will forcibly activate the power limiting function or initiate a safety protection mode because it cannot obtain the real-time temperature parameters of the corresponding battery cell. However, in actual commercial vehicle operation scenarios, such as heavy-duty transportation, adopting a protection strategy that excessively limits power output may lead to derivative problems such as reduced transportation efficiency and road safety hazards. Summary of the Invention

[0005] This invention provides a method, apparatus, equipment, and vehicle for handling battery temperature sampling disconnection faults. When a battery temperature sampling disconnection fault occurs, by dynamically adjusting the current protection threshold and charging / discharging current, the vehicle can still operate normally and safely, thus balancing system safety and operational efficiency.

[0006] In a first aspect, embodiments of the present invention provide a method for handling battery temperature sampling disconnection faults, including: When a battery temperature sampling line breakage fault is detected in the power battery system, the number of broken temperature sampling lines is obtained. When the number of broken wires is less than or equal to a preset number, the highest temperature of the current single cell of the power battery is detected. When the difference between the first temperature fault threshold and the current highest temperature of the single cell is detected to be greater than or equal to the first preset temperature, the current lowest temperature of the single cell of the power battery is detected. When the difference between the current lowest temperature of a single unit and the second temperature fault threshold is detected to be greater than or equal to the second preset temperature, it is determined whether the current highest temperature and the current lowest temperature of a single unit are within the preset temperature range. When it is determined that both the current highest temperature and the current lowest temperature of the single cell are outside the preset temperature range, the charging and discharging current is limited to a first preset current value; wherein, the first temperature fault threshold is greater than the second temperature fault threshold, and the first preset current value is less than the original current limit of the charging and discharging current of the power battery.

[0007] Optionally, after obtaining the number of broken wires in the temperature sampling line, the method further includes: when the number of broken wires is detected to be greater than the preset number, controlling the power battery system to enter a limp mode, limiting the energy recovery current and charging current to a second preset current value; wherein the first preset current value is greater than the second preset current value.

[0008] Optionally, after detecting the current highest temperature of a single cell in the power battery, the method further includes: when the difference between the first temperature fault threshold and the current highest temperature of the single cell is less than a first preset temperature, controlling the power battery system to enter a limp mode, limiting the energy recovery current and charging current to a third preset current value; wherein the first preset current value is greater than the third preset current value.

[0009] Optionally, after detecting the current lowest temperature of a single cell in the power battery, the method further includes: when the difference between the current lowest temperature of a single cell and a second temperature fault threshold is less than a second preset temperature, controlling the power battery system to enter a limp mode, limiting the energy recovery current and charging current to a fourth preset current value; wherein, the first preset current value is greater than the fourth preset current value.

[0010] Optionally, after determining whether the current highest temperature and the current lowest temperature of the monomer are within a preset temperature range, the method further includes: When it is determined that the current highest temperature and the current lowest temperature of the single cell are within the preset temperature range, the charging and discharging current is limited by the original current limit.

[0011] Secondly, embodiments of the present invention also provide a processing apparatus for a battery temperature sampling disconnection fault, used to execute the processing method for a battery temperature sampling disconnection fault described in the first aspect, including: The broken wire count detection module is used to obtain the number of broken temperature sampling wires when a battery temperature sampling broken wire fault is detected in the power battery system. The single-cell temperature detection module is used to detect the current highest temperature of a single cell of the power battery when the number of broken wires detected by the broken wire count detection module is less than or equal to a preset number of broken wires. The single-cell temperature detection module is also used to detect the current lowest temperature of the power battery cell when the difference between the first temperature fault threshold and the current highest temperature of the single cell is greater than or equal to the first preset temperature. The unit temperature detection module is also used to determine whether the current unit maximum temperature and the current unit minimum temperature are within a preset temperature range when the difference between the current unit minimum temperature and the second temperature fault threshold is greater than or equal to the second preset temperature. The current limit module is used to limit the charging and discharging current to a first preset current value when the cell temperature detection module determines that both the current highest temperature and the current lowest temperature of the cell are outside the preset temperature range; wherein, the first temperature fault threshold is greater than the second temperature fault threshold, and the first preset current value is less than the original current limit of the charging and discharging current of the power battery.

[0012] Optionally, the processing apparatus further includes: The power battery system control module is used to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a second preset current value when the broken wire number detection module detects that the number of broken wires is greater than the preset number of wires; wherein the first preset current value is greater than the second preset current value. The power battery system control module is further configured to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a third preset current value when the difference between the first temperature fault threshold detected by the single cell temperature detection module and the current highest temperature of the single cell is less than a first preset temperature; wherein, the first preset current value is greater than the third preset current value. The power battery system control module is further configured to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a fourth preset current value when the single cell temperature detection module detects that the difference between the current single cell minimum temperature and the second temperature fault threshold is less than the second preset temperature; wherein, the first preset current value is greater than the fourth preset current value.

[0013] Optionally, the power battery system control module is further configured to limit the charging and discharging current with the original current limit when the cell temperature detection module determines that the current highest temperature and the current lowest temperature of the cell are within the preset temperature range.

[0014] Thirdly, embodiments of the present invention also provide a device for processing battery temperature sampling disconnection faults, the device comprising: at least one processor; and a memory communicatively connected to at least one processor; wherein the memory stores a computer program executable by at least one processor, the computer program being executed by at least one processor to enable at least one processor to perform the battery temperature sampling disconnection fault processing method described in any of the above embodiments. Fourthly, embodiments of the present invention also provide a vehicle, comprising: the battery temperature sampling disconnection fault processing device described in the third aspect.

[0015] This invention discloses a method, apparatus, device, and vehicle for handling battery temperature sampling disconnection faults. When a battery temperature sampling disconnection fault occurs in the power battery system, the protection threshold of the current and the charging and discharging current can be dynamically adjusted based on parameters such as the number of disconnected temperature sampling lines, the current highest temperature of the power battery cell, and the current lowest temperature of the power battery cell. This ensures that the vehicle can still operate normally and safely, balancing system safety and operational efficiency.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart of a method for handling a battery temperature sampling disconnection fault provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a battery temperature sampling disconnection fault processing device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of another battery temperature sampling disconnection fault processing device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a battery temperature sampling disconnection fault processing device provided in an embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] Figure 1 This is a flowchart illustrating a method for handling a battery temperature sampling disconnection fault according to an embodiment of the present invention. This embodiment is applicable to situations where a battery temperature sampling disconnection fault occurs in a power battery. The method can be executed by a battery temperature sampling disconnection fault handling device, which can be implemented in hardware and / or software and can be configured within a battery temperature sampling disconnection fault handling equipment. (Reference) Figure 1 The method includes the following steps: S110. When a battery temperature sampling line breakage fault is detected in the power battery system, the number of broken temperature sampling lines is obtained.

[0022] For example, when the resistance value of a certain channel of the power battery system is detected to be greater than or equal to the open circuit threshold, it can be directly determined that there is a battery temperature sampling disconnection fault in the power battery system.

[0023] S120. When the number of broken wires detected is less than or equal to the preset number, the highest temperature of the current single cell of the power battery is detected.

[0024] The preset number of roots can be set through calibration. For example, the preset number of roots can be 3, 4, 5, etc., and can be designed according to the actual situation in specific implementation.

[0025] It is understandable that when the number of broken wires is less than or equal to the preset number, this embodiment does not adopt a protection strategy that excessively restricts power output. Instead, it further detects the current highest temperature of a single cell in the power battery to determine the impact of the fault on the operation of the entire vehicle.

[0026] S130. When the difference between the first temperature fault threshold and the current highest temperature of a single cell is detected to be greater than or equal to the first preset temperature, the current lowest temperature of a single cell of the power battery is detected.

[0027] The first temperature fault threshold is the high temperature fault threshold of the power battery. The first preset temperature can be set by calibration. For example, the first preset temperature can be 5℃, but it can be designed according to the actual situation in specific implementation.

[0028] It is understandable that when the difference between the first temperature fault threshold and the current highest temperature of a single cell is detected to be greater than or equal to the first preset temperature, this embodiment does not adopt a protection strategy that excessively restricts power output at this time, but further detects the current lowest temperature of the single cell of the power battery.

[0029] S140. When the difference between the current lowest temperature of a single unit and the second temperature fault threshold is detected to be greater than or equal to the second preset temperature, determine whether the current highest temperature and the current lowest temperature of a single unit are within the preset temperature range.

[0030] Among them, the second temperature fault threshold is the low temperature fault threshold of the power battery, and the preset temperature range is the temperature range of the maximum charging and discharging capacity of the power battery cell. It is selected and calibrated according to the current MAP. The second preset temperature can be set through calibration. For example, the second preset temperature can be 5℃. In specific implementation, it can be designed according to the actual situation.

[0031] It is understandable that when the difference between the current lowest temperature of a single cell and the second temperature fault threshold is detected to be greater than or equal to the second preset temperature, this embodiment does not adopt a protection strategy that excessively restricts power output at this time, but further determines whether the current highest temperature and the current lowest temperature of the single cell are within the preset temperature range.

[0032] S150. When it is determined that both the current highest temperature and the current lowest temperature of a single cell are outside the preset temperature range, the charging and discharging current is limited to a first preset current value; wherein, the first temperature fault threshold is greater than the second temperature fault threshold, and the first preset current value is less than the original current limit of the charging and discharging current of the power battery.

[0033] The first preset current value can be set through calibration. For example, the first preset current value can be 0.9 times the original current limit. The original current limit refers to the current limit of the power battery system when no battery temperature sampling disconnection fault occurs.

[0034] It is understandable that when it is determined that both the current highest temperature and the current lowest temperature of the single cell are outside the preset temperature range, this embodiment does not adopt a protection strategy that excessively restricts the power output, but instead limits the charging and discharging current to the first preset current value.

[0035] In this embodiment, when the power battery system experiences a battery temperature sampling line disconnection fault, the current protection threshold and charging / discharging current are dynamically adjusted based on parameters such as the number of disconnected temperature sampling lines, the current highest temperature of a single power battery cell, and the current lowest temperature of a single power battery cell. This ensures that the vehicle can still operate normally and safely, balancing system safety and operational efficiency.

[0036] Optionally, based on the above embodiments, after obtaining the number of broken wires in the temperature sampling line, the method further includes: when the number of broken wires is detected to be greater than a preset number, controlling the power battery system to enter a limp mode, limiting the energy recovery current and charging current to a second preset current value; wherein the first preset current value is greater than the second preset current value.

[0037] The second preset current value can be set through calibration. For example, the second preset current value can be 0.3 times the original current limit.

[0038] In this embodiment, when the number of broken wires is detected to be greater than the preset number, the protection strategy of excessively limiting power output is not adopted. Instead, the power battery system is controlled to enter limp mode, and the energy recovery current and charging current are limited to the second preset current value. This can ensure that the vehicle can still drive normally and safely, and can balance system safety and operational efficiency.

[0039] Optionally, based on the above embodiments, after detecting the current highest temperature of a single cell in the power battery, the method further includes: when the difference between the first temperature fault threshold and the current highest temperature of a single cell is less than a first preset temperature, controlling the power battery system to enter a limp mode, and limiting the energy recovery current and charging current to a third preset current value; wherein the first preset current value is greater than the third preset current value.

[0040] Specifically, the third preset current value can be equal to the second preset current value.

[0041] In this embodiment, when the difference between the first temperature fault threshold and the current highest temperature of a single cell is less than the first preset temperature, the protection strategy of excessively limiting power output is not adopted. Instead, the power battery system is controlled to enter limp mode, and the energy recovery current and charging current are limited to the second preset current value. This can ensure that the vehicle can still drive normally and safely, and can balance system safety and operational efficiency.

[0042] Optionally, based on the above embodiments, after detecting the current lowest temperature of a single cell in the power battery, the method further includes: when the difference between the current lowest temperature of a single cell and the second temperature fault threshold is less than the second preset temperature, controlling the power battery system to enter limp mode, and limiting the energy recovery current and charging current to a fourth preset current value; wherein, the first preset current value is greater than the fourth preset current value.

[0043] Specifically, the fourth preset current value can be equal to the second preset current value.

[0044] In this embodiment, when the difference between the current lowest temperature of a single cell and the second temperature fault threshold is less than the second preset temperature, the protection strategy of excessively limiting power output is not adopted. Instead, the power battery system is controlled to enter limp mode, limiting the energy recovery current and charging current to the second preset current value. This can ensure that the vehicle can still drive normally and safely, and can balance system safety and operational efficiency.

[0045] Optionally, based on the above embodiments, after determining whether the current highest temperature and the current lowest temperature of the monomer are within a preset temperature range, the method further includes: When the current highest temperature and the current lowest temperature of a single cell are determined to be within the preset temperature range, the charging and discharging current is limited by the original current limit.

[0046] In this embodiment, when the current highest temperature and the current lowest temperature of a single cell are determined to be within the preset temperature range, the BMS does not perform fault degradation processing, but limits the charging and discharging current with the original current limit, which can further balance system safety and operational efficiency.

[0047] Figure 2 This is a schematic diagram of a battery temperature sampling disconnection fault handling device provided in an embodiment of the present invention, used to execute the battery temperature sampling disconnection fault handling method provided in any of the above embodiments. (Refer to...) Figure 2 The device includes: The disconnection detection module 210 is used to obtain the number of disconnected temperature sampling lines when a battery temperature sampling disconnection fault is detected in the power battery system; the single-cell temperature detection module 220 is used to detect the current highest temperature of the power battery cell when the number of disconnections detected by the disconnection detection module is less than or equal to a preset number; the single-cell temperature detection module 220 is also used to detect the current lowest temperature of the power battery cell when the difference between the first temperature fault threshold and the current highest temperature of the cell is greater than or equal to a first preset temperature; the single-cell temperature detection module 220 is also used to determine whether the current highest temperature and the current lowest temperature of the cell are within a preset temperature range when the difference between the current lowest temperature and the second temperature fault threshold is greater than or equal to a second preset temperature; the current limit module 230 is used to limit the charging and discharging current to a first preset current value when the single-cell temperature detection module determines that both the current highest temperature and the current lowest temperature of the cell are outside the preset temperature range; wherein, the first temperature fault threshold is greater than the second temperature fault threshold, and the first preset current value is less than the original current limit of the charging and discharging current of the power battery.

[0048] Figure 3 This is a schematic diagram of another battery temperature sampling disconnection fault processing device provided in an embodiment of the present invention. Optionally, based on the above embodiment, refer to... Figure 3 The processing device also includes: The power battery system control module 310 is used to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a second preset current value when the number of broken wires detected by the broken wire count detection module is greater than a preset number; wherein the first preset current value is greater than the second preset current value. The power battery system control module 310 is also used to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a third preset current value when the difference between the first temperature fault threshold and the current highest temperature of a single cell is less than the first preset temperature, wherein the first preset current value is greater than the third preset current value. The power battery system control module 310 is also used to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a fourth preset current value when the difference between the current lowest temperature of a single cell and the second temperature fault threshold is less than the second preset temperature, wherein the first preset current value is greater than the fourth preset current value.

[0049] Optionally, based on the above embodiments, the power battery system control module 310 is further configured to limit the charging and discharging current with the original current limit when the cell temperature detection module determines that the current highest temperature and the current lowest temperature of the cell are within the preset temperature range.

[0050] The battery temperature sampling disconnection fault handling device provided in this embodiment of the invention can execute the battery temperature sampling disconnection fault handling method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method. For contents not described in detail in the embodiments of the invention, please refer to the battery temperature sampling disconnection fault handling method provided in the above embodiments.

[0051] Figure 4 This is a schematic diagram of a battery temperature sampling disconnection fault handling device provided in an embodiment of the present invention. This device is specifically designed for various types of vehicles, including but not limited to passenger cars, commercial vehicles, industrial vehicles, and agricultural machinery. The device may exist in any of the following forms, including but not limited to, integrated into the vehicle's central control system, a separate electronic control unit, or a separate diagnostic device. The device utilizes the vehicle's own sensor network, such as exhaust flow sensors and differential pressure sensors, to collect key parameters in real time and process the data through a built-in processor. Furthermore, the system also has the ability to communicate with other vehicle electronic modules (such as the engine control unit ECU) and share data through standardized vehicle communication protocols (such as CAN bus, FlexRay, or Ethernet) to achieve more comprehensive fault diagnosis and vehicle performance optimization. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0052] like Figure 4 As shown, the battery temperature sampling disconnection fault handling device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the battery temperature sampling disconnection fault handling device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0053] Multiple components in the battery temperature sampling disconnection fault handling device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the battery temperature sampling disconnection fault handling device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0054] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the method for handling a battery temperature sampling disconnection fault.

[0055] This invention also provides a vehicle, including: the battery temperature sampling disconnection fault processing device provided in the above embodiments.

[0056] The vehicle in question can be a new energy commercial vehicle.

[0057] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0058] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for handling a battery temperature sampling disconnection fault, characterized in that, include: When a battery temperature sampling line breakage fault is detected in the power battery system, the number of broken temperature sampling lines is obtained. When the number of broken wires is less than or equal to a preset number, the highest temperature of the current single cell of the power battery is detected. When the difference between the first temperature fault threshold and the current highest temperature of the single cell is detected to be greater than or equal to the first preset temperature, the current lowest temperature of the single cell of the power battery is detected. When the difference between the current lowest temperature of a single unit and the second temperature fault threshold is detected to be greater than or equal to the second preset temperature, it is determined whether the current highest temperature and the current lowest temperature of a single unit are within the preset temperature range. When it is determined that both the current highest temperature and the current lowest temperature of the single cell are outside the preset temperature range, the charging and discharging current is limited to a first preset current value; wherein, the first temperature fault threshold is greater than the second temperature fault threshold, and the first preset current value is less than the original current limit of the charging and discharging current of the power battery.

2. The method for handling battery temperature sampling disconnection faults according to claim 1, characterized in that, After obtaining the number of broken wires in the temperature sampling line, the method further includes: when the number of broken wires is detected to be greater than the preset number, controlling the power battery system to enter limp mode, limiting the energy recovery current and charging current to a second preset current value; wherein the first preset current value is greater than the second preset current value.

3. The method for handling battery temperature sampling disconnection faults according to claim 1, characterized in that, After detecting the current highest temperature of a single cell in the power battery, the method further includes: when the difference between the first temperature fault threshold and the current highest temperature of the single cell is less than a first preset temperature, controlling the power battery system to enter a limp mode, limiting the energy recovery current and charging current to a third preset current value; wherein, the first preset current value is greater than the third preset current value.

4. The method for handling battery temperature sampling disconnection faults according to claim 1, characterized in that, After detecting the current lowest temperature of the current single cell of the power battery, the method further includes: when the difference between the current lowest temperature of the current single cell and the second temperature fault threshold is less than the second preset temperature, controlling the power battery system to enter limp mode, limiting the energy recovery current and the charging current to a fourth preset current value; wherein, the first preset current value is greater than the fourth preset current value.

5. The method for handling battery temperature sampling disconnection faults according to claim 1, characterized in that, After determining whether the current highest temperature and the current lowest temperature of the monomer are within a preset temperature range, the method further includes: When it is determined that the current highest temperature and the current lowest temperature of the single cell are within the preset temperature range, the charging and discharging current is limited by the original current limit.

6. A device for handling battery temperature sampling disconnection faults, used to execute the method for handling battery temperature sampling disconnection faults according to any one of claims 1-5, characterized in that, include: The broken wire count detection module is used to obtain the number of broken temperature sampling wires when a battery temperature sampling broken wire fault is detected in the power battery system. The single-cell temperature detection module is used to detect the current highest temperature of a single cell of the power battery when the number of broken wires detected by the broken wire count detection module is less than or equal to a preset number of broken wires. The single-cell temperature detection module is also used to detect the current lowest temperature of the power battery cell when the difference between the first temperature fault threshold and the current highest temperature of the single cell is greater than or equal to the first preset temperature. The unit temperature detection module is also used to determine whether the current unit maximum temperature and the current unit minimum temperature are within a preset temperature range when the difference between the current unit minimum temperature and the second temperature fault threshold is greater than or equal to the second preset temperature. The current limit module is used to limit the charging and discharging current to a first preset current value when the cell temperature detection module determines that both the current highest temperature and the current lowest temperature of the cell are outside the preset temperature range; wherein, the first temperature fault threshold is greater than the second temperature fault threshold, and the first preset current value is less than the original current limit of the charging and discharging current of the power battery.

7. The device for handling battery temperature sampling disconnection faults according to claim 6, characterized in that, The processing device further includes: The power battery system control module is used to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a second preset current value when the broken wire number detection module detects that the number of broken wires is greater than the preset number of wires; wherein the first preset current value is greater than the second preset current value. The power battery system control module is further configured to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a third preset current value when the difference between the first temperature fault threshold detected by the single cell temperature detection module and the current highest temperature of the single cell is less than a first preset temperature; wherein, the first preset current value is greater than the third preset current value. The power battery system control module is further configured to control the power battery system to enter limp mode and limit the energy recovery current and charging current to a fourth preset current value when the single cell temperature detection module detects that the difference between the current single cell minimum temperature and the second temperature fault threshold is less than the second preset temperature; wherein, the first preset current value is greater than the fourth preset current value.

8. The device for handling battery temperature sampling disconnection faults according to claim 7, characterized in that, The power battery system control module is also used to limit the charging and discharging current with the original current limit when the cell temperature detection module determines that the current highest temperature and the current lowest temperature of the cell are within the preset temperature range.

9. A device for handling battery temperature sampling disconnection faults, characterized in that, The battery temperature sampling disconnection fault handling device includes: at least one processor; and a memory communicatively connected to at least one of the processors; wherein the memory stores a computer program executable by at least one of the processors, the computer program being executed by at least one of the processors to enable at least one of the processors to perform the battery temperature sampling disconnection fault handling method according to any one of claims 1-5.

10. A vehicle, characterized in that, include: The battery temperature sampling disconnection fault handling device as described in claim 9.

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