Battery module failure early warning method, device, equipment and storage medium

Abstract

This disclosure provides a method, apparatus, device, and storage medium for early warning of battery module faults. The method includes acquiring performance parameters of the battery module's total positive and negative output terminals, including at least one of the voltage values ​​and temperature values ​​of the battery module's total positive and negative output terminals; if the performance parameters of the battery module's total positive and negative output terminals meet preset fault conditions, then a fault is determined in the battery module, and fault information of the battery module is obtained; the fault information of the battery module is sent to the user equipment for early warning of the fault.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, and in particular to a battery module fault early warning method, a battery module fault early warning device, an electronic device, and a computer-readable storage medium. Background Technology

[0002] Energy storage devices generally include battery modules (or battery clusters) consisting of a certain number of battery cells connected in series or in parallel, and battery systems consisting of multiple battery modules connected in series.

[0003] In related technologies, the detection method of the Battery Management System (BMS) can detect whether an open circuit has occurred in each cluster-level input circuit inside the high-voltage box. However, the above detection method cannot accurately locate the location of the open circuit, nor can it detect the overall positive and negative connection reliability of the battery module output, resulting in low efficiency and accuracy of battery module fault detection and causing low after-sales maintenance efficiency.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] This disclosure provides a method, apparatus, device, and storage medium for early warning of battery module faults, which at least to some extent overcomes the problems of low efficiency and accuracy in battery module fault detection in related technologies.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to one aspect of this disclosure, a battery module fault early warning method is provided, comprising: acquiring performance parameters of the total positive and negative output terminals of the battery module, the performance parameters including at least one of the voltage values ​​of the total positive and negative output terminals of the battery module and the temperature values ​​of the total positive and negative output terminals of the battery module; if the performance parameters of the total positive and negative output terminals of the battery module meet preset fault conditions, determining that the battery module has a fault and obtaining fault information of the battery module; and sending the fault information of the battery module to a user equipment for fault early warning.

[0008] In one embodiment of this disclosure, when the performance parameters of the total positive and negative output terminals of the battery module include the temperature values ​​of the total positive and negative output terminals of the battery module, the preset fault condition includes a preset temperature range; wherein, determining that the battery module has a fault if the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault condition includes: determining that the battery module has a fault if the temperature values ​​of the total positive and / or negative output terminals of the battery module are within the preset temperature range.

[0009] In one embodiment of this disclosure, the preset fault conditions include multiple preset temperature ranges, and the fault information of the battery module includes fault levels, with one preset temperature range corresponding to one fault level.

[0010] In one embodiment of this disclosure, the method further includes: determining a target processing measure corresponding to the fault level of the battery module according to a preset measure correspondence, and executing the target processing measure, wherein the preset measure correspondence is used to characterize the correspondence between the fault level of the battery module and the processing measure.

[0011] In one embodiment of this disclosure, the preset temperature range includes a first temperature range, and the fault level of the battery module is a level one fault; wherein, when the performance parameters of the total positive and negative output terminals of the battery module are within the first temperature range, the execution of the target processing measure includes: configuring the power of the battery module to a first preset power, wherein the first preset power is less than the rated power of the battery module.

[0012] In one embodiment of this disclosure, the preset temperature range includes a second temperature range, the fault level of the battery module is a level two fault, and the left endpoint of the second temperature range is greater than or equal to the right endpoint of the first temperature range; wherein, when the performance parameters of the total positive and negative output terminals of the battery module are within the second temperature range, the execution of the target processing measure includes: configuring the power of the battery module to a second preset power, wherein the second preset power is less than the first preset power.

[0013] In one embodiment of this disclosure, the preset temperature range includes a third temperature range, the fault level of the battery module is a level three fault, and the left endpoint of the third temperature range is greater than or equal to the right endpoint of the second temperature range; wherein, when the performance parameters of the total positive and negative output terminals of the battery module are within the third temperature range, the execution of the target processing measure includes: disconnecting the main relay in the high-voltage box of the battery cluster corresponding to the battery module.

[0014] In one embodiment of this disclosure, the fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, and fault level.

[0015] In one embodiment of this disclosure, when the performance parameters include the voltage values ​​of the total positive output terminal and the total negative output terminal of the battery module, the preset fault condition includes a first preset voltage threshold; wherein, if the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault condition, it is determined that the battery module has a fault, and the fault information of the battery module is obtained, it includes: determining the voltage drop of the output terminal of the battery module based on the voltage values ​​of the total positive output terminal and the total negative output terminal of the battery module; if the voltage drop of the output terminal of the battery module is less than the first preset voltage threshold, it is determined that the circuit in which the battery module is located has a fault.

[0016] In one embodiment of this disclosure, the preset fault condition further includes a second preset voltage threshold; wherein, determining that there is a fault in the circuit where the battery module is located includes: obtaining the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster corresponding to the battery module; if the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster is less than the second preset voltage threshold, then determining that there is an open circuit in the high-voltage box of the battery cluster.

[0017] In one embodiment of this disclosure, the method further includes: if the total voltage value of the voltage sampling points in the high voltage box of the battery cluster is equal to the second preset voltage threshold, then it is determined that an open circuit has occurred inside the battery module.

[0018] In one embodiment of this disclosure, the fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, fault level, and voltage sampling point information.

[0019] According to another aspect of this disclosure, a battery module fault early warning device is provided, comprising: a parameter acquisition module, configured to acquire performance parameters of the total positive and negative output terminals of the battery module, the performance parameters including at least one of the voltage values ​​of the total positive and negative output terminals of the battery module and the temperature values ​​of the total positive and negative output terminals of the battery module; a fault determination module, configured to determine that the battery module has a fault if the performance parameters of the total positive and negative output terminals of the battery module meet preset fault conditions, and obtain fault information of the battery module; and an early warning generation module, configured to send the fault information of the battery module to a user equipment for fault early warning.

[0020] According to another aspect of this disclosure, an electronic device is also provided, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the battery module fault warning method described in any one of the preceding claims by executing the executable instructions.

[0021] According to another aspect of this disclosure, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the battery module fault early warning method described in any of the preceding claims.

[0022] According to another aspect of this disclosure, a computer program product is also provided, including a computer program that, when executed by a processor, implements the battery module fault early warning method described above.

[0023] In this embodiment, performance parameters of the battery module's total positive and negative output terminals are acquired. These performance parameters include at least one of the voltage values ​​and temperature values ​​of the battery module's total positive and negative output terminals. If the performance parameters of the battery module's total positive and negative output terminals meet preset fault conditions, a fault is determined in the battery module, and fault information is obtained. This fault information is then sent to the user equipment. By collecting the performance parameters of the battery module's total positive and negative output terminals, this disclosure, on the one hand, detects whether there is an abnormal temperature rise at each PACK's total positive and negative output terminals, thereby determining whether the connection of each PACK's total positive and negative output terminals is reliable during system operation, improving system operational safety and after-sales maintenance efficiency. On the other hand, by adding voltage detection at the PACK's total positive and negative output terminals, it is possible to quickly locate battery modules with short-circuit faults, thereby promptly notifying maintenance personnel and improving maintenance efficiency.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0026] Figure 1 A schematic diagram of the structure of an energy storage system according to an embodiment of the present disclosure is shown.

[0027] Figure 2 A flowchart of a battery module fault early warning method is shown in an embodiment of this disclosure.

[0028] Figure 3 A flowchart of another battery module fault early warning method is shown in an embodiment of this disclosure.

[0029] Figure 4 A flowchart of another battery module fault early warning method is shown in this disclosure embodiment.

[0030] Figure 5 A flowchart of another battery module fault early warning method is shown in an embodiment of this disclosure.

[0031] Figure 6 A flowchart of another battery module fault early warning method is shown in this disclosure embodiment.

[0032] Figure 7 A schematic diagram of the structure of a liquid-cooled battery module is shown in an embodiment of this disclosure.

[0033] Figure 8 A schematic diagram of the structure of a battery module using air cooling in an embodiment of this disclosure is shown.

[0034] Figure 9 The following is a flowchart illustrating an example of a battery module fault early warning method according to an embodiment of this disclosure.

[0035] Figure 10 The flowchart of Example 2 of a battery module fault early warning method in the present disclosure is shown.

[0036] Figure 11 A schematic diagram of a battery module fault warning device is shown in an embodiment of this disclosure.

[0037] Figure 12 A structural block diagram of an electronic device according to an embodiment of the present disclosure is shown. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0039] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0040] Because the energy we need is highly time- and space-dependent, in order to utilize energy rationally and improve energy efficiency, it is necessary to store one form of energy in the same way or by converting it into another, and then release it in a specific energy form based on future application needs. Currently, the main way to generate green electricity is to develop green energy sources such as photovoltaics and wind power to replace fossil fuels.

[0041] Currently, the generation of green electricity generally relies on solar, wind, and hydropower. However, wind and solar power are generally characterized by strong intermittency and large fluctuations, which can cause grid instability, insufficient power during peak demand periods, and excessive power during off-peak periods. Unstable voltage can also damage the power grid. Therefore, insufficient electricity demand or insufficient grid capacity may lead to the problem of "wind and solar curtailment." Solving these problems requires energy storage. This involves converting electrical energy into other forms of energy through physical or chemical means and storing it. When needed, this energy can be converted back into electrical energy and released. Simply put, energy storage is like a large "power bank," storing electrical energy when solar and wind power are abundant and releasing the stored electricity when needed.

[0042] Taking electrochemical energy storage as an example, this disclosure provides an energy storage device. The energy storage device is equipped with a set of chemical batteries, which mainly use the chemical elements in the batteries as energy storage medium. The charging and discharging process is accompanied by the chemical reaction or change of the energy storage medium. Simply put, the electrical energy generated by wind and solar energy is stored in the chemical batteries. When the use of external electrical energy reaches its peak, the stored electrical energy is released for use, or transferred to places with a shortage of electricity for use.

[0043] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, and consumption-side energy storage. The corresponding types of energy storage devices include:

[0044] (1) Large-scale energy storage power stations applied to wind power and photovoltaic power stations can assist renewable energy power generation in meeting grid connection requirements and improve the utilization rate of renewable energy. As a high-quality active / reactive power regulation power source on the power supply side, energy storage power stations can achieve load matching of power in time and space, enhance the absorption capacity of renewable energy, reduce instantaneous power changes, reduce the impact on the power grid, improve the absorption of new energy power generation, and are of great significance in power grid system backup, alleviating peak load power supply pressure and peak regulation and frequency regulation.

[0045] (2) Energy storage containers applied on the grid side mainly function as peak shaving, frequency regulation and grid congestion relief. In terms of peak shaving, they can realize peak shaving and valley filling of electricity load, that is, charging the energy storage battery when the electricity load is low and releasing the stored electricity during the peak electricity load period, thereby achieving a balance between power production and consumption, such as energy storage power station systems.

[0046] (3) Small energy storage cabinets applied to the electricity consumption side mainly function as self-consumption of electricity, peak-valley price arbitrage, capacity cost management, and improvement of power supply reliability. Depending on the application scenario, electricity consumption side energy storage can be divided into industrial and commercial energy storage cabinets, household energy storage equipment, energy storage charging piles, etc., which are generally used in conjunction with distributed photovoltaics. Industrial and commercial users can use energy storage for peak-valley price arbitrage and capacity cost management. In the electricity market implementing peak-valley pricing, by charging the energy storage system when the electricity price is low and discharging the energy storage system when the electricity price is high, peak-valley price arbitrage can be achieved, reducing electricity costs. In addition, industrial enterprises subject to two-part tariffs can use energy storage systems to store energy during off-peak hours and discharge during peak loads, thereby reducing peak power and the maximum demand declared, achieving the goal of reducing capacity charges. Household photovoltaics with energy storage can improve the level of self-consumption of electricity. Due to high electricity prices and poor power supply stability, the demand for household photovoltaic installations is driven. Given that photovoltaic power generation occurs during the day, while user load is generally higher at night, configuring energy storage can better utilize photovoltaic power, improve self-consumption levels, and reduce electricity costs. Furthermore, energy storage is needed in areas such as communication base stations and data centers for backup power.

[0047] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an energy storage system 100 according to an embodiment of the present disclosure, and the present disclosure Figure 1 The embodiments are illustrated using a shared energy storage scenario on the generation / distribution side as an example. The energy storage system 100 disclosed herein is not limited to such a scenario.

[0048] This disclosure provides an energy storage system 100, which includes an energy storage device 110, a high-voltage cable 120, a first power conversion device 130, and a second power conversion device 140. During power generation, the first power conversion device 130 and the second power conversion device 140 convert other forms of energy into electrical energy, which is then connected to the high-voltage cable 120 and supplied to the power consumption side of the distribution network. When the power load is low and the first conversion device 130 and the second power conversion device 140 generate excess power, the excess power is stored in the energy storage device 110, reducing wind and solar power curtailment rates and improving the absorption of new energy power generation. When the power load is high, the power grid issues an instruction to transmit the power stored in the energy storage device 110 in conjunction with the high-voltage cable 120 in a grid-connected mode to supply power to the power consumption side, providing various services such as peak shaving, frequency regulation, and backup for power grid operation, fully leveraging the peak shaving function of the power grid, promoting peak shaving and valley filling, and alleviating the power supply pressure on the power grid.

[0049] Optionally, the first power conversion device 130 and the second power conversion device 140 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy and mechanical energy into electrical energy.

[0050] The number of energy storage devices 110 can be multiple, and the multiple energy storage devices 110 can be connected in series or in parallel. The multiple energy storage devices 110 are supported and electrically connected by an isolation plate (not shown in the figure). In this embodiment, "multiple" means two or more. An energy storage box can also be provided on the outside of the energy storage device 110 to house the energy storage device 110.

[0051] Optionally, the energy storage device 110 may include, but is not limited to, a single battery cell, a battery module, a battery pack, or a battery system. The actual application form of the energy storage device 110 provided in this disclosure embodiment may be, but is not limited to, the listed products, and may also be other application forms. This disclosure embodiment does not strictly limit the application form of the energy storage device 110. This disclosure embodiment only uses a multi-cell battery as an example for illustration. When the energy storage device 110 is a single battery cell, the energy storage device 110 may be at least one of cylindrical batteries, prismatic batteries, etc.

[0052] In related technologies, battery energy storage systems primarily employ air cooling and liquid cooling methods to design battery modules (PACKs). Regarding fuse design, air-cooled battery cluster fuses are located within the cluster-level PACK and the high-voltage box, while liquid-cooled battery cluster fuses are located within each PACK and the high-voltage box. When a fuse blows between clusters or within a PACK, the BMS control strategy detects the total positive and negative voltage values ​​within each cluster-level high-voltage box to determine if an open circuit has occurred in that battery cluster. For liquid-cooled PACKs, a quick-connect design is used to connect the PACK's total positive and negative output high-voltage connectors, while air-cooled high-voltage connectors use a bolt-locking method. The reliability of the total positive and negative output high-voltage connection is tested during product off-line testing.

[0053] The BMS detection technology in related technologies can only detect whether an open circuit has occurred in each cluster-level input circuit inside the high-voltage box. It cannot accurately locate the specific location of the open circuit, such as which PACK the open circuit occurred in, resulting in low maintenance efficiency.

[0054] In addition, the reliability of the PACK output positive and negative connections cannot be tested in real time through product off-line testing. Furthermore, the positive and negative connectors are operated more frequently than other locations during installation and maintenance. If the PACK positive and negative connection points become loose during customer installation and maintenance or during long-term operation, it will cause abnormal temperature rise at the connection points, which may lead to the risk of melting and burning of the connector plastic parts, resulting in a decrease in the system's insulation performance and affecting the normal operation of the system.

[0055] In this disclosure, the battery management system is divided into three levels: PACK slave-controlled battery management system (BMS, abbreviated as MBMU), cluster-level master control BMS (abbreviated as CBMU), and system master control BMS (abbreviated as SBMU). Among them, the MBMU of each PACK can detect the total positive and negative voltage information, temperature information, etc. at the output terminal position, and send the total positive and negative voltage information and temperature information to the CBMU. The CBMU can determine whether there are abnormalities or excessive temperatures in the total voltage information and temperature information of each PACK. When the voltage is abnormal or the temperature exceeds the standard, it can obtain fault information and upload the fault information to the SBMU. The SBMU can upload the received fault information to the user equipment, thereby reminding the back-end inspection personnel to perform maintenance.

[0056] To at least partially address the aforementioned issues, this disclosure acquires performance parameters of the battery module's total positive and negative output terminals. These performance parameters include at least one of the voltage values ​​and temperature values ​​of the battery module's total positive and negative output terminals. If the performance parameters of the battery module's total positive and negative output terminals meet preset fault conditions, a fault is determined in the battery module, and fault information is obtained. This fault information is then sent to the user equipment. By collecting the performance parameters of the battery module's total positive and negative output terminals, this disclosure, on the one hand, detects whether there is an abnormal temperature rise at each PACK's total positive and negative output terminals, thereby determining whether the connection of each PACK's total positive and negative output terminals is reliable during system operation, improving system operational safety and after-sales maintenance efficiency; on the other hand, by adding voltage detection at the PACK's total positive and negative output terminals, it can quickly locate battery modules with short-circuit faults, thereby promptly notifying maintenance personnel and improving maintenance efficiency.

[0057] Under the above system architecture, this disclosure provides a battery module fault early warning method. This method can be executed by any electronic device with computing power, such as the battery management unit, battery cluster control management unit or stack-level management unit in this disclosure.

[0058] Figure 2 This diagram illustrates a flowchart of a battery module fault early warning method according to an embodiment of the present disclosure, such as... Figure 2 As shown in the embodiments of this disclosure, the battery module fault early warning method can be applied to CBMU and includes the following steps:

[0059] S202. Obtain the performance parameters of the total positive and negative output terminals of the battery module. The performance parameters include at least one of the voltage values ​​of the total positive and negative output terminals of the battery module and the temperature values ​​of the total positive and negative output terminals of the battery module.

[0060] In one embodiment, the performance parameters of the battery module's total positive and negative output terminals can be either temperature values ​​detected by a temperature sensor or voltage values ​​measured by a voltage acquisition unit. These performance parameters can be used to detect performance changes at the battery module's total positive and negative output terminals. It should be noted that other parameters that reflect performance changes at the battery module's total positive and negative output terminals can also be selected, such as resistance or current.

[0061] Voltage sampling points and / or temperature sampling points can be set on the positive copper busbar connected to the total positive output terminal. Voltage sampling points are equipped with voltage acquisition units, and temperature sampling points are equipped with temperature sensors. Similarly, voltage sampling points and / or temperature sampling points can be set on the negative copper busbar connected to the total negative output terminal. Voltage sampling points are equipped with voltage acquisition units, and temperature sampling points are equipped with temperature sensors. It should be noted that the positions of the voltage and temperature sampling points on the copper busbar can be determined according to actual conditions, and this disclosure does not impose specific limitations.

[0062] The voltage acquisition unit and temperature sensor mentioned above are electrically connected to the MBMU, so that the MBMU sends the performance parameters of the total positive and negative output terminals of the battery module to the CBMU.

[0063] S204. If the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions, then it is determined that there is a fault in the battery module, and the fault information of the battery module is obtained.

[0064] In one embodiment, preset fault conditions can be pre-set in the CBMU, and the preset fault conditions can be used as the basis for judging whether there is an abnormality in the connection of the total positive and negative output terminals of the battery module.

[0065] For the method of detecting whether there is an abnormality in the PACK by voltage value, the preset fault condition can be the first preset voltage threshold of the PACK's total positive and negative output terminals. The first preset voltage threshold is the voltage value output when the PACK is working normally. When the voltage drop of the battery module's total positive and negative output terminals is less than the first preset voltage threshold, it can be determined that an open circuit has occurred inside the PACK. The voltage sampling point on the copper busbar cannot detect the total voltage of the PACK, and it can be determined that an open circuit has occurred in the series high voltage circuit inside the current PACK.

[0066] For methods that detect whether a PACK is abnormal by measuring temperature, preset fault conditions may include preset temperature range or preset temperature value. When the temperature value of the PACK's total positive and negative output terminals is within the preset temperature range, or when the temperature value of the PACK's total positive and negative output terminals is greater than the preset temperature value, it is determined that a fault has occurred in the PACK's internal circuit.

[0067] In one embodiment, the MBMU collects the performance parameters at the output of the battery module according to a preset sampling frequency. The sampling frequency can be determined according to the actual situation, such as 30Hz, which means collecting 30 performance parameters per second.

[0068] If the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions within a certain period of time, such as within 1 minute; or if the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions when sampled multiple times consecutively, then it is determined that the battery module has a fault.

[0069] It should be noted that the aforementioned first preset voltage threshold, the endpoint value of the preset temperature range, the preset temperature value, etc., can be determined according to the actual situation, and this disclosure does not impose specific limitations.

[0070] Battery module fault information is used to characterize the exact location of the fault, such as the faulty battery module, the abnormal output terminal of the battery module, the abnormal sampling point inside the battery module, and fault-related information.

[0071] S206. Send battery module fault information to user equipment for fault warning.

[0072] In one embodiment, when the CBMU receives the fault information of the battery module, it can upload the fault information to the SBMU. The SBMU then sends the fault information of the battery module to the user equipment. The user equipment can be equipment used by maintenance personnel, etc., and can be a backend device. The user equipment can be various electronic devices with display functions, including but not limited to smartphones, tablets, displays, and desktop computers.

[0073] The clients for applications that can be installed on a user's device are the same, or clients for the same type of application based on different operating systems. Depending on the terminal platform, the specific form of the application's client can also differ; for example, the application client can be a mobile client, a PC client, etc.

[0074] User equipment can display received fault information from the battery module, thereby reminding backend monitoring personnel to perform inspections and maintenance.

[0075] In this embodiment, performance parameters of the battery module's total positive and negative output terminals are acquired. These performance parameters include at least one of the voltage values ​​and temperature values ​​of the battery module's total positive and negative output terminals. If the performance parameters of the battery module's total positive and negative output terminals meet preset fault conditions, a fault is determined in the battery module, and fault information of the battery module is obtained. The fault information of the battery module is then sent to the user equipment. By collecting the performance parameters of the battery module's total positive and negative output terminals, this disclosure, on the one hand, detects whether there is an abnormal temperature rise at each PACK's total positive and negative output terminals, thereby determining whether the connection of each PACK's total positive and negative output terminals is reliable during system operation, improving system operational safety and increasing after-sales maintenance efficiency; on the other hand, by adding voltage detection at the PACK's total positive and negative output terminals, it is possible to quickly locate battery modules with short-circuit faults, thereby promptly notifying maintenance personnel and improving maintenance efficiency.

[0076] Figure 3 A flowchart of another battery module fault early warning method according to an embodiment of this disclosure is shown. Figure 2Based on the embodiment, S204 is refined to S2042 to limit the situation where a fault exists in the circuit where the battery module is located, determined by the temperature values ​​of the total positive and negative output terminals and a preset temperature range. In this case, when the performance parameters of the battery module's total positive and negative output terminals include the temperature values ​​of the battery module's total positive and negative output terminals, the preset fault condition includes the preset temperature range. For example... Figure 3 As shown, in one embodiment, the battery module fault early warning method of this disclosure includes S202, S2042, and S206. The method includes:

[0077] S2042. If the temperature values ​​of the total positive output terminal and / or the total negative output terminal of the battery module are within the preset temperature range, then the battery module is determined to be faulty.

[0078] It should be noted that the implementation methods of S202 and S206 in this embodiment are the same as those in the previous embodiments, and will not be repeated here.

[0079] In one embodiment, the preset temperature range can be represented as a numerical interval, such as (A1, A2), where the left endpoint A1 of the numerical interval can be the highest temperature value at which the total positive and negative output terminals of the battery module malfunction. It should be noted that the endpoint values ​​A1 and A2 of the preset temperature range can be determined according to actual conditions, such as 80°C, and this disclosure does not impose a specific limitation.

[0080] For example, when the temperature value of the total positive output terminal and / or the total negative output terminal of the battery module is less than or equal to the left end of the above-mentioned numerical range, it indicates that the battery module is operating normally and no further processing is required.

[0081] When the temperature values ​​of the battery module's total positive output terminal and / or total negative output terminal are greater than the left end of the above-mentioned value range, or when the temperature values ​​of the battery module's total positive output terminal and / or total negative output terminal are within the above-mentioned preset temperature range, it indicates that the battery module has a fault. At this time, the battery module's identification information can be recorded to remind the background monitoring personnel to pay attention in a timely manner.

[0082] In one embodiment, the preset fault conditions include multiple preset temperature ranges, and the fault information of the battery module includes a fault level, with each preset temperature range corresponding to a fault level. These multiple preset temperature ranges can be multiple temperature ranges with temperature gradients. When the temperature values ​​of the battery module's total positive output terminal and / or total negative output terminal are within different preset temperature ranges, the impact of the battery module's fault on the system varies. Based on the degree of impact, the battery module's fault level is classified, with higher fault levels indicating greater harm and lower fault levels indicating less harm. Therefore, different handling strategies can be adopted for different fault levels to promptly address issues such as loose connections in the PACK's total positive and negative connection sections or foreign objects on the connection surface causing increased contact resistance and resulting in significant temperature rises.

[0083] For example, the preset fault conditions can divide the above numerical range into multiple sub-ranges. For instance, (A1,A2) can be divided into three sub-ranges, namely (A1,A3), [A3,A4), and [A4,A2). The sub-range (A1,A3) corresponds to a level 1 fault, [A3,A4) corresponds to a level 2 fault, and [A4,A2) corresponds to a level 3 fault.

[0084] In this embodiment, by dividing the system into multiple preset temperature ranges, with each preset temperature range corresponding to a fault level, the system promptly alerts backend monitoring personnel to handle the fault according to its impact, thereby ensuring the safety and stability of the system.

[0085] Figure 4 A flowchart of a battery module fault early warning method according to an embodiment of this disclosure is shown. Figure 3 Based on the previous embodiment, S208 is added to limit the fault handling method. For example... Figure 4 As shown in the embodiments of this disclosure, the method includes steps S202, S2042, and S206 to S208, wherein:

[0086] S208. Based on the preset measure correspondence, determine the target handling measures corresponding to the fault level of the battery module, and execute the target handling measures. The preset measure correspondence is used to characterize the correspondence between the fault level of the battery module and the handling measures.

[0087] It should be noted that the specific implementation of S202, S2042, and S206 in this embodiment is similar to that in the previous embodiment, and will not be repeated here.

[0088] The aforementioned preset measures correspondence can be pre-configured in the CMBU. The preset measures correspondence is used to record the correspondence between the fault level of the battery module and the handling measures. Corresponding to the fault level, as the fault level gradually increases, the urgency of the handling measures gradually increases.

[0089] When the CMBU determines that there is a fault in the battery module, it can determine the fault level based on the preset temperature range where the temperature values ​​of the total positive output terminal and / or total negative output terminal of the battery module are located. Based on the preset measure correspondence, it can determine the target handling measures corresponding to the above fault level. By executing the target handling measures, the battery module fault can be eliminated, and the safety of battery module operation can be achieved.

[0090] The pre-defined measures correspondence can be represented in the form of correspondence tables, charts, etc., so that the CMBU can quickly determine the target treatment measures by looking up the table.

[0091] In one embodiment, a pre-defined correspondence between measures can be established to create a relationship between the fault level of the battery module and the handling measures.

[0092] Depending on the level of the fault, different handling measures can be set. For example, measures such as limiting power or cutting off the high-voltage circuit can be taken to rationally use the battery module and improve its utilization rate and safety.

[0093] It should be noted that the execution order of S206 and S208 can be determined according to the actual situation.

[0094] In this embodiment, the target handling measures corresponding to the fault level of the battery module are quickly and conveniently determined by the preset measure correspondence, thereby improving the fault handling efficiency of the battery module and ensuring the safety of the battery system operation.

[0095] In one embodiment, the preset temperature range includes a first temperature range, and the fault level of the battery module is a level one fault; wherein, when the performance parameters of the total positive and negative output terminals of the battery module are within the first temperature range, the execution target processing measures in S208 above include: configuring the power of the battery module to a first preset power, wherein the first preset power is less than the rated power of the battery module.

[0096] For example, the first temperature range can be [80, 90), that is, the temperature value of the total positive output terminal and / or the temperature value of the total negative output terminal of the battery module is between 80°C and 90°C, with 80°C as the lowest temperature value for determining that the battery module has a fault.

[0097] When the temperature values ​​of the total positive output terminal and / or the total negative output terminal of the battery module are within the first temperature range, power limiting measures can be adopted to effectively prevent the battery module from further temperature rise.

[0098] The rated power of the battery module is the power it provides during normal operation. When the temperature values ​​at the total positive output terminal and / or the total negative output terminal of the battery module are within a first temperature range, the first preset power can be configured to 50% of the rated power. It should be noted that the magnitude of the first preset power can be determined according to actual conditions.

[0099] In this embodiment of the disclosure, when the fault level of the battery module is Level 1 fault, it indicates that the battery module has a temperature rise. The temperature rise range only has a certain degree of impact on the battery module. By limiting the power, further temperature rise of the battery module can be prevented. The first preset power being greater than 0 can ensure the safety of the electrical load and prevent the adverse effects of sudden power outage on the electrical load.

[0100] In one embodiment, the preset temperature range includes a second temperature range, the fault level of the battery module is a level two fault, the left endpoint of the second temperature range is greater than or equal to the right endpoint of the first temperature range; when the performance parameters of the total positive and negative output terminals of the battery module are in the second temperature range, the target processing measures are executed, including: configuring the power of the battery module to a second preset power, wherein the second preset power is less than the first preset power.

[0101] For example, when the temperature value corresponding to the second temperature range is higher than the temperature value corresponding to the first temperature range, it indicates that the temperature value of the total positive output terminal and / or the total negative output terminal of the battery module has increased more significantly than normal operation. At this time, the fault level of the battery module is further upgraded to a level two fault. According to the preset measure correspondence, the target handling measures corresponding to the level two fault are determined.

[0102] For a level 2 fault, the target handling measure can be a power limiting measure. Compared with a level 1 fault, the power limiting measure for a level 2 fault is further enhanced, making the second preset power less than the first preset power.

[0103] For example, the second temperature range is [90, 100). When the temperature values ​​of the total positive output terminal and / or the total negative output terminal of the battery module are within the second temperature range, the power of the battery module can be configured to 0.

[0104] It should be noted that the first preset power, the second preset power, and the temperature range can be determined according to the actual situation. The right endpoint of the first temperature range and the left endpoint of the second temperature range can be the same or different. This disclosure does not make any specific limitations.

[0105] In this embodiment of the disclosure, when the fault level of the battery module is level two, it indicates that the battery module has a significant temperature rise. The temperature rise range has a great impact on the battery module. By implementing power limiting measures, it is possible to prevent further temperature rise of the battery module from causing the connector plastic parts to melt and burn through, thus ensuring the normal operation of the system.

[0106] In one embodiment, the preset temperature range includes a third temperature range, the fault level of the battery module is a level three fault, and the left endpoint of the third temperature range is greater than or equal to the right endpoint of the second temperature range; wherein, when the performance parameters of the total positive and negative output terminals of the battery module are in the third temperature range, the execution target processing measures in S208 above include: disconnecting the main relay in the high voltage box of the battery cluster corresponding to the battery module.

[0107] The temperature value corresponding to the third temperature range is further increased than the temperature value corresponding to the second temperature range. At this time, the fault level of the battery module corresponding to the third temperature range is level three fault.

[0108] For level 3 faults, the high-voltage circuit can be disconnected.

[0109] For example, the third temperature range can be [100, 150). When the temperature value of the total positive output terminal and / or the temperature value of the total negative output terminal of the battery module are within the third temperature range, the fault level of the battery module is determined to be a level three fault. At this time, the main relay in the high voltage box of the battery cluster corresponding to the battery module can be cut off, thereby cutting the faulty battery module out of its circuit. This effectively avoids the problem of the battery module's temperature rising too quickly, which would cause the system's insulation performance to decline, and ensures the normal operation of the system.

[0110] In one embodiment, when a battery module fault is determined by temperature, the fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, and fault level.

[0111] The battery module identifier serves as the unique identifier for each battery module. This identifier can be represented by numbers, symbols, letters, or characters. For example, for battery modules arranged in an m×n array, it can be represented as PACKi×j, where i and j represent the row and column numbers of the battery module in the array, respectively. The fault output terminal identifier indicates the output terminal with a fault. It can be a total positive output terminal and / or a total negative output terminal, and can be represented by + or -. The fault type can be an abnormal temperature. The fault level is determined based on the temperature range of the total positive and / or total negative output terminals of the battery module, for example, it can be a level 1 fault, level 2 fault, level 3 fault, etc., depending on the actual situation.

[0112] This disclosure provides more accurate fault location for back-end monitoring personnel and improves fault handling efficiency by limiting the fault information of battery modules.

[0113] Figure 5 A flowchart of another battery module fault early warning method according to an embodiment of this disclosure is shown. Figure 2 Based on the previous embodiment, S204 is further refined into S2044 to S2046, limiting the scenarios in which the battery module is faulty is determined by the voltage information at its output terminal. In this case, when the performance parameters include the voltage values ​​at the battery module's total positive and negative output terminals, the preset fault condition includes a first preset voltage threshold. For example... Figure 5 As shown, in one embodiment, the battery module fault early warning method provided by this disclosure includes S202, S2044-S2046, and S206. The method includes:

[0114] S2044. Determine the voltage drop at the output terminal of the battery module based on the voltage values ​​at the total positive output terminal and the total negative output terminal of the battery module.

[0115] S2046 If the voltage drop at the output terminal of the battery module is less than the first preset voltage threshold, it is determined that there is a fault in the circuit where the battery module is located.

[0116] In one embodiment, the voltage drop at the output terminal of the battery module can be obtained by calculating the difference between the voltage value at the total positive output terminal and the voltage value at the total negative output terminal of the battery module. During operation, the battery module can provide rated power, a first preset voltage threshold, etc., to the electrical load. The first preset voltage threshold is the voltage value that the battery module needs to provide to the electrical load when operating normally, and the target voltage value can be determined according to actual needs.

[0117] The first preset voltage threshold can be pre-configured in the CMBU. When the calculated voltage drop at the output of the battery module is less than the first preset voltage threshold, it indicates that the battery module cannot provide the required voltage value to the electrical load, and it is determined that the series circuit inside the battery module may be open.

[0118] In one scenario, if the PACK voltage cannot be detected at the total positive output terminal and the total negative output terminal of the battery module, it can also be determined that there is a fault in the circuit where the battery module is located.

[0119] In this embodiment, the voltage drop at the output terminal of the battery module is calculated by the voltage values ​​at the total positive and negative output terminals of the battery module. The relationship between the voltage drop threshold and the first preset voltage threshold is compared. Based on the comparison result, it is determined whether there is a fault in the circuit where the battery module is located. Thus, by adding a voltage detection channel, early warning and handling of open circuits and faults at the total positive and negative output connection points within the PACK can be achieved, thereby improving the safety and reliability of the battery system.

[0120] Figure 6 A flowchart illustrating a battery module fault early warning method according to an embodiment of this disclosure is shown. Figure 5 Based on the embodiment, S2046 is further refined into S2048 to locate faulty components within the PACK. The preset fault condition also includes a second preset voltage threshold. Determining that a fault exists in the circuit containing the battery module includes:

[0121] S2048. Obtain the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster corresponding to the battery module; if the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster is less than the second preset voltage threshold, it is determined that there is an open circuit in the high-voltage box of the battery cluster.

[0122] Furthermore, the above S2048 also includes: if the total voltage value of the voltage sampling points in the high voltage box of the battery cluster is equal to the second preset voltage threshold, then it is determined that an open circuit has occurred inside the battery module.

[0123] Multiple voltage sampling points can be set in the high-voltage box of the battery cluster. Each voltage sampling point corresponds to a second preset voltage threshold. When the total voltage value of a voltage sampling point is equal to the corresponding second preset voltage threshold, it indicates that there is no abnormality in the circuit in the high-voltage box. At this time, it can be determined that the PACK fault is a fault at the positive and negative connection points, that is, an open circuit occurs inside the battery module. The information of the battery module with an internal open circuit can be uploaded to the SBMU.

[0124] When the total voltage value at the voltage acquisition point is less than the second preset voltage threshold or the voltage value at the voltage acquisition point is abnormal, it indicates that there is an abnormality in the circuit inside the high voltage box. At this time, the information of the battery module with abnormal voltage acquisition point can be uploaded to the SBMU.

[0125] In one embodiment, the fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, fault level, and voltage sampling point information. The battery module identifier can serve as the unique identification information of the battery module, and its implementation is the same as in the previous embodiments, so it will not be repeated here. The fault output terminal identifier is used to characterize the faulty output terminal, and its implementation is the same as in the previous embodiments. The fault type can be voltage anomaly. The voltage sampling point information is used to characterize the precise location of the voltage anomaly sampling point within the battery cluster. For voltage sampling points within the battery cluster, each voltage sampling point can be pre-numbered, and each voltage sampling point corresponds to a battery module. By limiting the fault information of the battery module, more accurate fault location can be provided to backend monitoring personnel, improving fault handling efficiency.

[0126] It should be noted that the fault warning methods of voltage detection and temperature detection disclosed herein can be implemented individually or in combination, and this disclosure does not impose any specific limitations.

[0127] To deepen the understanding of the technical solution disclosed herein, the following is in conjunction with the appendix. Figure 7-10 Please provide a detailed explanation.

[0128] Figure 7 A schematic diagram of the structure of a liquid-cooled battery module according to an embodiment of this disclosure is shown. Figure 7 As shown, in the liquid-cooled battery module, the battery module includes multiple battery cells, a total positive output terminal 710, a total negative output terminal 720, a total positive copper busbar 730, and a total negative copper busbar 740. The total positive output terminal 710 is connected to the total positive copper busbar 730, the total negative output terminal 720 is connected to the total negative copper busbar 740, and the total positive copper busbar 730 and the total negative copper busbar 740 are respectively connected to the positive and negative terminals of the multiple battery cells after being connected in series and parallel.

[0129] Voltage acquisition point 750 and temperature acquisition point 760 are set on the main positive copper busbar 730; similarly, voltage acquisition point 750 and temperature acquisition point 760 are also set on the main negative copper busbar 740 to acquire the voltage and temperature values ​​of the main positive and negative output terminals of the battery module.

[0130] Voltage acquisition point 750 and temperature acquisition point 760 are respectively set on the total positive copper busbar 730 or the total negative copper busbar 740, and different types of acquisition points are set on the adjacent sides of the total positive copper busbar 730 and the total negative copper busbar 740.

[0131] like Figure 8 As shown, in the water-cooled battery module, the battery module includes multiple battery cells, a total positive output terminal 710', a total negative output terminal 720', a total positive copper busbar 730', and a total negative copper busbar 740'. The total positive output terminal 710' is connected to the total positive copper busbar 730', the total negative output terminal 720' is connected to the total negative copper busbar 740', and the total positive copper busbar 730' and the total negative copper busbar 740' are respectively connected to the positive and negative terminals of the multiple battery cells after being connected in series and parallel.

[0132] A voltage acquisition point 750' and a temperature acquisition point 760' are set on the main positive copper busbar 730'; similarly, a voltage acquisition point 750' and a temperature acquisition point 760' are also set on the main negative copper busbar 740' to acquire the voltage and temperature values ​​of the main positive and negative output terminals of the battery module.

[0133] Voltage acquisition point 750' and temperature acquisition point 760' are arranged side by side on the total positive copper busbar 730' or the total negative copper busbar 740', and are located on the adjacent sides of the total positive copper busbar 730' and the total negative copper busbar 740'.

[0134] like Figure 9As shown, the battery module fault early warning method provided in this disclosure can be used to determine whether a battery module has a fault based on the temperature value at the output terminal of the battery module. The method includes:

[0135] S902, The MBMU of each battery module detects the total positive and negative temperature information at the output of the battery module;

[0136] S904. The MBMU of each battery module sends the total positive and negative temperature information detected at the output of the battery module to the CBMU.

[0137] S906, CBMU determines whether the output temperature value of each module at the cluster level has reached the fault threshold. If yes, then execute S908; if no, then execute S912. It should be noted that the above fault threshold can be the preset temperature range in the aforementioned embodiment.

[0138] For example, when the positive and negative output terminals of the PACK are loose or the connection surface has an inherent tendency to increase contact resistance, a significant temperature rise will occur at the connection location. This abnormal temperature change can indicate a fault in the internal circuit. For instance, three fault levels can be defined: Level 1 fault threshold can be set to ≥80℃, with the action being to limit power to 50%; Level 2 fault threshold can be set to ≥90℃, with the action being to limit power to 0%; and Level 3 fault threshold can be set to ≥100℃, with the action being to disconnect the main relay inside the cluster-level high-voltage box.

[0139] The S980 and CBMU locate the battery module with abnormal temperature detection, handle it according to the corresponding fault level, and upload the fault information to the SBMU.

[0140] The S910 and SBMU will upload the received fault information to the backend, reminding the backend testing personnel to perform inspection and maintenance.

[0141] S912, the system is normal, no action is required.

[0142] like Figure 10 As shown, the battery module fault early warning method provided in this disclosure can be used to determine whether a battery module has a fault based on the voltage value at the output terminal of the battery module. The method includes:

[0143] S1002, The MBMU of each battery module detects the total positive and negative voltage information at the output terminal of the battery module;

[0144] S1004. The MBMU of each battery module sends the total positive and negative voltage information detected at the output terminal of the battery module to the CBMU.

[0145] S1006. CBMU checks whether the total voltage information at the output terminal of each module at the cluster level is abnormal. If not, proceed to S1007. The system runs normally and no action is taken. If yes, proceed to S1008.

[0146] S1008, CBMU determines whether the total pressure acquisition in the cluster-level high-voltage box is normal. If not, proceed to S1009; if yes, proceed to S1010.

[0147] S1009 and CBMU locate the module with abnormal voltage detection, upload the module information with internal open circuit to SBMU, and then transfer it to S1012;

[0148] S1010 and CBMU locate the module with abnormal voltage detection and upload the module information of abnormal voltage acquisition point in the high voltage box to SBMU;

[0149] S1012 and SBMU will upload the received fault information to the backend, reminding the backend monitoring personnel that maintenance is required.

[0150] In this disclosure, by adding temperature detection of the PACK total positive and negative connection points, the reliability of the PACK total positive and negative output connection points is improved, thereby enhancing the safety of system operation; by adding total voltage detection of the PACK total positive and negative output terminals, the location of the PACK with an open circuit within the fault cluster can be quickly identified, improving maintenance efficiency.

[0151] Based on the same inventive concept, this disclosure also provides a battery module fault early warning device, as described in the following embodiments. Since the principle by which this device solves the problem is similar to that of the above-described method embodiments, the implementation of this device embodiment can refer to the implementation of the above-described method embodiments, and repeated details will not be elaborated further.

[0152] Figure 11 This diagram illustrates a battery module fault warning device according to an embodiment of the present disclosure, such as... Figure 11 As shown, the device includes:

[0153] The parameter acquisition module 1110 is used to acquire the performance parameters of the total positive and negative output terminals of the battery module. The performance parameters include at least one of the voltage values ​​of the total positive and negative output terminals of the battery module and the temperature values ​​of the total positive and negative output terminals of the battery module.

[0154] The fault determination module 1120 is used to determine that there is a fault in the battery module if the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions, and to obtain the fault information of the battery module.

[0155] The early warning generation module 1130 is used to send fault information of the battery module to the user equipment for fault warning.

[0156] It should be noted that the parameter acquisition module 1110, fault determination module 1120, and early warning generation module 1130 correspond to S202 to S206 in the method embodiment. The examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the content disclosed in the above method embodiment. It should be noted that the above modules, as part of the apparatus, can be executed in a computer system such as a set of computer-executable instructions.

[0157] In one embodiment, when the performance parameters of the total positive and negative output terminals of the battery module include the temperature values ​​of the total positive and negative output terminals of the battery module, the preset fault condition includes a preset temperature range; the fault determination module 1120 is used to determine that the battery module has a fault if the temperature values ​​of the total positive and / or negative output terminals of the battery module are within the preset temperature range.

[0158] It should be noted that the preset fault conditions include multiple preset temperature ranges, and the fault information of the battery module includes fault levels, with one preset temperature range corresponding to one fault level.

[0159] In one embodiment, the device further includes a fault handling module not shown in the figures. The fault handling module is used to determine a target handling measure corresponding to the fault level of the battery module according to a preset measure correspondence, and to execute the target handling measure. The preset measure correspondence is used to characterize the correspondence between the fault level of the battery module and the handling measure.

[0160] In one embodiment, the preset temperature range includes a first temperature range, and the fault level of the battery module is a first-level fault; the fault handling module is used to configure the power of the battery module to a first preset power when the performance parameters of the total positive and negative output terminals of the battery module are in the first temperature range, and the first preset power is less than the rated power of the battery module.

[0161] In one embodiment, the preset temperature range includes a second temperature range, the fault level of the battery module is a level two fault, and the left endpoint of the second temperature range is greater than or equal to the right endpoint of the first temperature range; wherein, the fault handling module is used to configure the power of the battery module to a second preset power when the performance parameters of the total positive and negative output terminals of the battery module are in the second temperature range, wherein the second preset power is less than the first preset power.

[0162] In one embodiment, the preset temperature range includes a third temperature range, the fault level of the battery module is a level three fault, and the left endpoint of the third temperature range is greater than or equal to the right endpoint of the second temperature range; wherein, the fault handling module is used to disconnect the main relay in the high voltage box of the battery cluster corresponding to the battery module when the performance parameters of the total positive and negative output terminals of the battery module are in the third temperature range.

[0163] It should be noted that the fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, and fault level.

[0164] In one embodiment, when the performance parameters include the voltage values ​​of the total positive output terminal and the total negative output terminal of the battery module, the preset fault condition includes a first preset voltage threshold; wherein, the fault determination module 1120 is used to determine the voltage drop of the battery module output terminal based on the voltage values ​​of the total positive output terminal and the total negative output terminal of the battery module; if the voltage drop of the battery module output terminal is less than the first preset voltage threshold, it is determined that there is a fault in the circuit where the battery module is located.

[0165] In one embodiment, the preset fault condition further includes a second preset voltage threshold; the fault determination module 1120 is used to obtain the total voltage value of the voltage sampling points in the high voltage box of the battery cluster corresponding to the battery module; if the total voltage value of the voltage sampling points in the high voltage box of the battery cluster is less than the second preset voltage threshold, it is determined that there is an open circuit in the high voltage box of the battery cluster.

[0166] In one embodiment, the fault determination module 1120 is further configured to determine that an open circuit has occurred inside the battery module if the total voltage value of the voltage sampling points in the high voltage box of the battery cluster is equal to a second preset voltage threshold.

[0167] It should be noted that the fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, fault level, and voltage sampling point information.

[0168] In this embodiment, performance parameters of the battery module's total positive and negative output terminals are acquired. These performance parameters include at least one of the voltage values ​​and temperature values ​​of the battery module's total positive and negative output terminals. If the performance parameters of the battery module's total positive and negative output terminals meet preset fault conditions, a fault is determined in the battery module, and fault information of the battery module is obtained. The fault information of the battery module is then sent to the user equipment. By collecting the performance parameters of the battery module's total positive and negative output terminals, this disclosure, on the one hand, detects whether there is an abnormal temperature rise at each PACK's total positive and negative output terminals, thereby determining whether the connection of each PACK's total positive and negative output terminals is reliable during system operation, improving system operational safety and increasing after-sales maintenance efficiency; on the other hand, by adding voltage detection at the PACK's total positive and negative output terminals, it is possible to quickly locate battery modules with short-circuit faults, thereby promptly notifying maintenance personnel and improving maintenance efficiency.

[0169] Those skilled in the art will understand that various aspects of this disclosure can be implemented as a system, method, or program product. Therefore, various aspects of this disclosure can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software aspects, collectively referred to herein as a "circuit," "module," or "system."

[0170] The following reference Figure 12 To describe an electronic device 1200 according to such an embodiment of the present disclosure. Figure 12 The electronic device 1200 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0171] like Figure 12 As shown, the electronic device 1200 is manifested in the form of a general-purpose computing device. The components of the electronic device 1200 may include, but are not limited to: at least one processing unit 1210, at least one storage unit 1220, and a bus 1230 connecting different system components (including storage unit 1220 and processing unit 1210).

[0172] The storage unit stores program code that can be executed by the processing unit 1210, causing the processing unit 1210 to perform the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of this disclosure. For example, the processing unit 1210 can perform the following steps of the above method embodiments: obtaining performance parameters of the total positive and negative output terminals of the battery module, including at least one of the voltage values ​​of the total positive and negative output terminals of the battery module and the temperature values ​​of the total positive and negative output terminals of the battery module; if the performance parameters of the total positive and negative output terminals of the battery module meet preset fault conditions, determining that the battery module has a fault and obtaining fault information of the battery module; and sending the fault information of the battery module to the user equipment for fault warning.

[0173] Storage unit 1220 may include a readable medium in the form of a volatile storage unit, such as random access memory (RAM) 12201 and / or cache memory 12202, and may further include a read-only memory (ROM) 12203.

[0174] Storage unit 1220 may also include a program / utility 12204 having a set (at least one) of program modules 12205, such program modules 12205 including but not limited to: operating system, one or more application programs, other program modules and program data, each or some combination of these examples may include an implementation of a network environment.

[0175] Bus 1230 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0176] Electronic device 1200 can also communicate with one or more external devices 1240 (e.g., keyboard, pointing device, Bluetooth device, etc.), one or more devices that enable a user to interact with electronic device 1200, and / or any device that enables electronic device 1200 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 1250. Furthermore, electronic device 1200 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 1260. As shown, network adapter 1260 communicates with other modules of electronic device 1200 via bus 1230. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 1200, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0177] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0178] In particular, according to embodiments of this disclosure, the process described above with reference to the flowchart can be implemented as a computer program product, which includes a computer program that, when executed by a processor, implements the above-described battery module fault warning method.

[0179] In exemplary embodiments of this disclosure, a computer-readable storage medium is also provided, which may be a readable signal medium or a readable storage medium. In some possible implementations, various aspects of this disclosure may also be implemented as a program product including program code that, when run on an electronic device, causes the electronic device to perform the steps described in the foregoing "Exemplary Methods" section of this specification according to various exemplary embodiments of this disclosure.

[0180] More specific examples of computer-readable storage media in this disclosure may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0181] In this disclosure, a computer-readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of transmitting, propagating, or transmitting a program for use by or in connection with an instruction execution system, apparatus, or device.

[0182] Optionally, the program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0183] In practical implementation, program code for performing the operations of this disclosure can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0184] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0185] Furthermore, although the steps of the method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0186] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, mobile terminal, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0187] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A method for early warning of battery module faults, characterized in that, include: Obtain the performance parameters of the total positive and negative output terminals of the battery module, wherein the performance parameters include at least one of the voltage values ​​of the total positive and negative output terminals of the battery module and the temperature values ​​of the total positive and negative output terminals of the battery module; If the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions, then it is determined that the battery module has a fault, and the fault information of the battery module is obtained. Send fault information of the battery module to the user equipment to provide fault warning; When the performance parameters include the voltage values ​​of the total positive output terminal and the total negative output terminal of the battery module, the preset fault conditions include a first preset voltage threshold and a second preset voltage threshold; wherein, if the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions, it is determined that the battery module has a fault, and the fault information of the battery module is obtained, including: The voltage drop at the output terminal of the battery module is determined based on the voltage values ​​at the total positive output terminal and the total negative output terminal of the battery module. If the voltage drop at the output terminal of the battery module is less than the first preset voltage threshold, the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster corresponding to the battery module is obtained; if the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster is less than the second preset voltage threshold, it is determined that there is an open circuit in the high-voltage box of the battery cluster.

2. The battery module fault early warning method according to claim 1, characterized in that, When the performance parameters of the total positive and negative output terminals of the battery module include the temperature values ​​of the total positive and negative output terminals of the battery module, the preset fault condition includes a preset temperature range. Wherein, the step of determining that the battery module has a fault if the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions includes: If the temperature values ​​of the total positive output terminal and / or total negative output terminal of the battery module are within the preset temperature range, then the battery module is determined to be faulty.

3. The battery module fault early warning method according to claim 2, characterized in that, The preset fault conditions include multiple preset temperature ranges, and the fault information of the battery module includes fault levels, with one preset temperature range corresponding to one fault level.

4. The battery module fault early warning method according to claim 3, characterized in that, The method further includes: Based on the preset measure correspondence, a target handling measure corresponding to the fault level of the battery module is determined, and the target handling measure is executed. The preset measure correspondence is used to characterize the correspondence between the fault level of the battery module and the handling measure.

5. The battery module fault early warning method according to claim 4, characterized in that, The preset temperature range includes a first temperature range, and the fault level of the battery module is a level one fault; wherein, when the performance parameters of the total positive and negative output terminals of the battery module are within the first temperature range, the execution of the target processing measures includes: The power of the battery module is configured to a first preset power, which is less than the rated power of the battery module.

6. The battery module fault early warning method according to claim 5, characterized in that, The preset temperature range includes a second temperature range, the battery module's fault level is level two, and the left endpoint of the second temperature range is greater than or equal to the right endpoint of the first temperature range; wherein, when the performance parameters of the battery module's total positive and negative output terminals are within the second temperature range, the execution of the target processing measures includes: The power of the battery module is configured to a second preset power, wherein the second preset power is less than the first preset power.

7. The battery module fault early warning method according to claim 6, characterized in that, The preset temperature range includes a third temperature range, the fault level of the battery module is a level three fault, and the left endpoint of the third temperature range is greater than or equal to the right endpoint of the second temperature range. Wherein, when the performance parameters of the total positive and negative output terminals of the battery module are within the third temperature range, the execution of the target processing measures includes: Disconnect the main relay in the high-voltage box of the battery cluster corresponding to the battery module.

8. The battery module fault early warning method according to claim 2, characterized in that, The fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, and fault level.

9. The battery module fault early warning method according to claim 1, characterized in that, The method further includes: If the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster is equal to the second preset voltage threshold, then it is determined that an open circuit has occurred inside the battery module.

10. The battery module fault early warning method according to claim 1, characterized in that, The fault information of the battery module includes at least one of the following: battery module identifier, fault output terminal identifier, fault type, fault level, and voltage sampling point information.

11. A battery module fault early warning device, characterized in that, include: The parameter acquisition module is used to acquire the performance parameters of the total positive and negative output terminals of the battery module. The performance parameters include at least one of the voltage values ​​of the total positive and negative output terminals of the battery module and the temperature values ​​of the total positive and negative output terminals of the battery module. The fault determination module is used to determine that the battery module has a fault if the performance parameters of the total positive and negative output terminals of the battery module meet the preset fault conditions, and to obtain the fault information of the battery module. When the performance parameters include the voltage values ​​of the total positive output terminal and the total negative output terminal of the battery module, the preset fault conditions include a first preset voltage threshold and a second preset voltage threshold. The early warning generation module is used to send fault information of the battery module to the user equipment for fault warning. The fault determination module is used to determine the voltage drop at the output terminal of the battery module based on the voltage values ​​at the total positive output terminal and the total negative output terminal of the battery module. If the voltage drop at the output terminal of the battery module is less than the first preset voltage threshold, then the total voltage value of the voltage sampling point in the high voltage box of the battery cluster corresponding to the battery module is obtained. If the total voltage value of the voltage sampling points in the high-voltage box of the battery cluster is less than the second preset voltage threshold, it is determined that there is an open circuit in the high-voltage box of the battery cluster.

12. An electronic device, characterized in that, include: processor; as well as Memory for storing the executable instructions of the processor; The processor is configured to execute the battery module fault warning method according to any one of claims 1 to 10 by executing the executable instructions.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the battery module fault early warning method according to any one of claims 1 to 10.

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