Storage battery state abnormity alarm method, device, equipment and medium

Abstract

The invention discloses a storage battery state abnormity alarm method, device and equipment and a medium. The method comprises the following steps: acquiring a first voltage from a total positive electrode of a battery pack to a first intermediate point and a second voltage from a second intermediate point to a total negative electrode of the battery pack; if the voltage difference between the first voltage and the second voltage is greater than a preset first threshold value, sending an alarm signal of open circuit of the single battery; acquiring the voltage of a fuse wire between the battery pack and the direct current bus, judging whether the battery fuse wire is disconnected according to the voltage of the fuse wire, and if so, sending an alarm signal indicating that the state of the battery fuse wire is abnormal; and obtaining the voltage of a switch between the battery pack and the DC bus, judging whether the battery pack switch is disconnected according to the voltage of the switch, and if so, sending an alarm signal indicating that the battery switch state is abnormal. According to the invention, the accuracy and the real-time performance of the abnormal state alarm of the storage battery are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery monitoring, and in particular to a method, device, equipment and medium for abnormal battery status alarm. Background Art

[0002] As the core part of the DC system, the substation battery pack not only provides instantaneous large current, but also serves as a backup power supply for the DC system. When the substation is operating normally, the battery pack is in standby mode. When the AC power fails, the battery pack will serve as a power supply for the DC system to ensure the safe operation of the substation. If the battery pack cannot supply power in time after the AC power fails, the entire DC system will lose power, causing huge losses. Therefore, it is of great significance to monitor the battery status and issue a battery disconnection alarm in time to ensure safety.

[0003] At present, in substations, battery packs are generally connected in series to the busbar, that is, the battery packs are connected in series internally, and the head and tail ends of the battery packs are connected to the positive and negative ends of the busbars respectively. In the wiring of the positive and negative ends of the busbars, a series of protection devices such as battery fuses, corresponding battery air switches and battery shunts are generally provided. However, none of the above devices can be used as a standard to determine whether the battery pack is currently disconnected from the busbar. They are only a feedback of the phenomenon that the battery has been disconnected from the busbar, and cannot provide timely warning of abnormal battery conditions. Summary of the invention

[0004] To solve the above technical problems, the present invention provides a battery status abnormal alarm method, device, equipment and medium, which can promptly alarm when a battery cell open circuit, battery fuse abnormality or battery switch abnormality occurs in the battery.

[0005] The embodiment of the present invention provides a battery status abnormality alarm method, comprising:

[0006] Obtaining a first voltage from the total positive pole of the battery pack to the first midpoint, and a second voltage from the second midpoint to the total negative pole of the battery pack; the number of batteries between the total positive pole of the battery pack and the first midpoint is equal to the number of batteries between the second midpoint and the total negative pole of the battery pack, and the number of batteries is not less than half of the total number of batteries in the battery pack;

[0007] If the voltage difference between the first voltage and the second voltage is greater than a preset first threshold, a warning signal of a battery cell open circuit is issued;

[0008] Obtaining the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, and if so, issuing an alarm signal indicating that the battery fuse state is abnormal;

[0009] The voltage of the switch between the battery pack and the DC bus is obtained, and it is determined whether the battery pack switch is disconnected according to the voltage of the switch. If so, an alarm signal indicating that the battery switch state is abnormal is issued.

[0010] As an improvement of the above solution, if the total number of batteries in the battery pack is 2n, n≥1, the battery at the total positive electrode of the battery is the first battery, then the first midpoint is the negative electrode of the nth battery, and the second midpoint is the positive electrode of the (n+1)th battery.

[0011] As an improvement of the above scheme, if the total number of batteries in the battery pack is 2n+1, n≥1, the battery at the total positive electrode of the battery is the first battery, then the first midpoint is the negative electrode of the n+1th battery, and the second midpoint is the positive electrode of the n+1th battery.

[0012] As an improvement of the above solution, the fuse includes: a first fuse connected between the total positive electrode of the battery pack and the positive electrode of the DC bus, and a second fuse connected between the total negative electrode of the battery pack and the negative electrode of the DC bus;

[0013] The obtaining of the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, includes:

[0014] Acquire a third voltage between a first end of the first fuse close to the battery pack and a second end of the second fuse far from the battery pack;

[0015] If the third voltage is less than a preset second threshold, it is determined that the battery fuse is disconnected.

[0016] As an improvement of the above solution, the step of obtaining the voltage of the fuse between the battery pack and the DC bus and judging whether the battery fuse is disconnected according to the voltage of the fuse further includes:

[0017] obtaining a fourth voltage between a third end of the first fuse far from the battery pack and a fourth end of the second fuse close to the battery pack;

[0018] If the fourth voltage is less than the preset third threshold, it is determined that the battery fuse is disconnected.

[0019] As an improvement of the above solution, the switch is divided into a positive switch and a negative switch;

[0020] The step of obtaining the voltage of a switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, includes:

[0021] Acquire a fifth voltage between a first end of the positive switch close to the battery pack and a second end of the negative switch far from the battery pack;

[0022] If the fifth voltage is less than a preset fourth threshold, it is determined that the battery pack switch is disconnected.

[0023] As an improvement of the above solution, the step of obtaining the voltage of the switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, further includes:

[0024] Acquire a sixth voltage between a third end of the negative electrode switch close to the battery pack and a fourth end of the positive electrode switch far from the battery pack;

[0025] If the sixth voltage is less than the preset fifth threshold, it is determined that the battery pack switch is disconnected.

[0026] The embodiment of the present invention also provides a battery status abnormality alarm device, comprising:

[0027] A voltage acquisition module, used to acquire a first voltage from the total positive pole of the battery pack to a first intermediate point, and a second voltage from the second intermediate point to the total negative pole of the battery pack; the number of batteries between the total positive pole of the battery pack and the first intermediate point is equal to the number of batteries between the second intermediate point and the total negative pole of the battery pack, and the number of batteries is not less than half of the total number of batteries in the battery pack;

[0028] A single battery abnormality alarm module, configured to issue an alarm signal of a battery cell open circuit if the voltage difference between the first voltage and the second voltage is greater than a preset first threshold;

[0029] A fuse abnormality alarm module, used to obtain the voltage of the fuse between the battery pack and the DC bus, and determine whether the battery fuse is disconnected according to the voltage of the fuse, and if so, issue an alarm signal of abnormal battery fuse status;

[0030] The switch abnormality alarm module is used to obtain the voltage of the switch between the battery pack and the DC bus, and determine whether the battery pack switch is disconnected according to the voltage of the switch. If so, an alarm signal of abnormal battery switch status is issued.

[0031] An embodiment of the present invention further provides a computer device, comprising a processor and a memory, wherein a computer program is stored in the memory, and the computer program is configured to be executed by the processor, and when the processor executes the computer program, the battery status abnormal alarm method described in any one of the above items is implemented.

[0032] An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program. When the computer program is running, the device where the computer-readable storage medium is located is controlled to execute any of the above-mentioned battery status abnormality alarm methods.

[0033] Compared with the prior art, the beneficial effects of the abnormal battery status alarm method, device, equipment and medium provided in the embodiments of the present invention are: by detecting the voltage at both ends and the middle point of the battery pack, an alarm is issued for abnormal battery pack cells, and by sampling the staggered voltage of the battery fuse and the battery switch, an alarm is issued for abnormal battery fuse and battery switch, which can achieve timely alarm when the battery is disconnected from the DC bus, notify the operation and maintenance personnel to eliminate hidden dangers in time, improve the accuracy and real-time performance of the abnormal battery status alarm, and is easy to use and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flowchart of a battery status abnormality alarm method provided by an embodiment of the present invention;

[0035] Figure 2 Schematic diagram of voltage detection points of a battery status abnormality alarm method provided by an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the main monitoring interface of a battery disconnection busbar alarm device provided in an embodiment of the present invention.

[0037] Figure 4 It is a structural schematic diagram of a battery status abnormality alarm device provided by an embodiment of the present invention;

[0038] Figure 5 It is a structural schematic diagram of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 , Figure 1 The present invention provides a flow chart of a method for an abnormal battery status alarm. The method for an abnormal battery status alarm comprises:

[0041] S1: Obtain a first voltage from the total positive electrode of the battery pack to the first midpoint, and a second voltage from the second midpoint to the total negative electrode of the battery pack; the number of batteries between the total positive electrode of the battery pack and the first midpoint is equal to the number of batteries between the second midpoint and the total negative electrode of the battery pack, and the number of batteries is not less than half of the total number of batteries in the battery pack;

[0042] S2: If the voltage difference between the first voltage and the second voltage is greater than a preset first threshold, a battery cell open circuit alarm signal is issued;

[0043] S3: obtaining the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, and if so, issuing an alarm signal indicating that the battery fuse is in an abnormal state;

[0044] S4: Obtain the voltage of the switch between the battery pack and the DC bus, and determine whether the battery pack switch is disconnected according to the voltage of the switch. If so, send an alarm signal indicating that the battery switch state is abnormal.

[0045] Specifically, when a battery pack is under the influence of charging (long-term overvoltage or undervoltage) or temperature, process and materials during long-term operation of a DC system, it is possible that a single cell may be open-circuited. When the voltage at the battery pack terminal is normal, a single or multiple battery cells in the battery pack may be open-circuited (the battery cell voltage is normal but cannot carry a load). In this case, the traditional battery inspection device cannot detect the battery abnormality in time and issue an alarm. To address this problem, the embodiment of the present invention determines whether there is an open-circuit fault in a battery cell in the battery by detecting the voltage at both ends and the center point of the battery pack.

[0046] As one of the optional embodiments, if the total number of batteries in the battery pack is 2n, n≥1, the battery at the total positive electrode of the batteries is the first battery, then the first midpoint is the negative electrode of the nth battery, and the second midpoint is the positive electrode of the n+1th battery.

[0047] Specifically, the alarm function when the battery cell is open circuit is realized by sampling the voltage of the battery pack in a segmented manner. Taking the battery pack in the DC220V direct current power supply system as an example, the battery pack is composed of 104 batteries with a single cell nominal voltage of 2V connected in series. Figure 2 As shown, the sampling points of the first voltage are from the positive electrode of the first battery (CLMK-33) to the negative electrode of the 52nd battery (CLMK-34), and the sampling points of the second voltage are from the negative electrode of the 52nd battery (i.e., the positive electrode of the 53rd battery) (CLMK-35) to the negative electrode of the 104th battery (CLMK-36). Under normal circumstances, the measured first voltage and the second voltage should be infinitely close or equal. If there is a single or multiple open-circuit battery in the battery pack, the first voltage and the second voltage will be unbalanced. The embodiment of the present invention compares the voltage difference obtained by these two voltage values. If the voltage difference is greater than the preset first threshold value, it is determined that there is an open-circuit battery in the battery pack and an alarm signal is issued.

[0048] As one of the optional embodiments, if the total number of batteries in the battery pack is 2n+1, n≥1, and the battery at the total positive electrode of the batteries is the first battery, then the first midpoint is the negative electrode of the n+1th battery, and the second midpoint is the positive electrode of the n+1th battery.

[0049] Specifically, if the total number of batteries is an odd number, taking 105 batteries as an example, the sampling points of the first voltage are from the positive electrode of the first battery to the negative electrode of the 53rd battery, and the sampling points of the second voltage are from the positive electrode of the 53rd battery to the negative electrode of the 105th battery. Furthermore, by monitoring the voltage difference between the first voltage and the second voltage, the alarm function when the battery cell is open circuit can be realized. The embodiment of the present invention only needs to detect the voltage at both ends and the center point of the battery pack to quickly obtain the detection result of the abnormality of the battery cell, which is simple to apply and highly practical.

[0050] Furthermore, the battery pack and the DC bus are usually connected via a battery switch and a battery fuse. When the DC system is operating normally, the battery pack switch and the battery fuse are closed. During the testing, modification, replacement, and other work of the battery pack, there is a need to disconnect the battery switch or the battery fuse. When we forget to close the battery pack switch or the fuse after completing our work, the battery pack will be disconnected from the DC bus. Also, when the DC system operates for a long time and the battery pack switch or the battery fuse has single-pole damage, the battery pack will also be disconnected from the DC bus. To address this issue, the embodiment of the present invention determines whether the battery fuse / battery switch is disconnected by sampling the voltage misalignment of the battery pack fuse terminal and the battery pack switch, and then issues an alarm when the battery fuse / battery switch is disconnected or the fault is blocked.

[0051] As one of the optional embodiments, the fuse includes: a first fuse connected between the total positive electrode of the battery pack and the positive electrode of the DC bus, and a second fuse connected between the total negative electrode of the battery pack and the negative electrode of the DC bus;

[0052] The obtaining of the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, includes:

[0053] Acquire a third voltage between a first end of the first fuse close to the battery pack and a second end of the second fuse far from the battery pack;

[0054] If the third voltage is less than a preset second threshold, it is determined that the battery fuse is disconnected.

[0055] Specifically, Figure 2As shown, FU1 is the first fuse, FU2 is the second fuse, and the third voltage between CLMK-61 and CLMK-62 is obtained by sampling the potential of the end of the first fuse close to the battery pack (CLMK-61) and the end of the second fuse far from the battery pack (CLMK-62). Under normal circumstances, the third voltage is close to the battery pack voltage. When the second fuse is disconnected / faulty, the third voltage drops. Therefore, when it is detected that the third voltage is less than the preset second threshold, it is determined that the second fuse is abnormal, the current battery state is abnormal, and an alarm signal is issued to prompt the staff that the battery is disconnected from the busbar.

[0056] As one of the optional embodiments, the step of obtaining the voltage of a fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, further includes:

[0057] obtaining a fourth voltage between a third end of the first fuse far from the battery pack and a fourth end of the second fuse close to the battery pack;

[0058] If the fourth voltage is less than the preset third threshold, it is determined that the battery fuse is disconnected.

[0059] Specifically, similar to the method for determining the abnormality of the second fuse, when the first fuse is disconnected / faulty, the fourth voltage drops. Therefore, when it is detected that the fourth voltage is less than the preset third threshold, the first fuse is determined to be abnormal and the current battery status is abnormal, and an alarm signal is issued to prompt the staff that the battery is detached from the bus.

[0060] As one of the optional embodiments, the switch is divided into a positive switch and a negative switch;

[0061] The step of obtaining the voltage of a switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, includes:

[0062] Acquire a fifth voltage between a first end of the positive switch close to the battery pack and a second end of the negative switch far from the battery pack;

[0063] If the fifth voltage is less than a preset fourth threshold, it is determined that the battery pack switch is disconnected.

[0064] Specifically, Figure 2As shown, by sampling the potential of the end of the positive switch close to the battery pack (CLMK-48) and the end of the negative switch far from the battery pack (CLMK-49), the fifth voltage between CLMK-48 and CLMK-49 is obtained. Under normal circumstances, the fifth voltage is close to the battery pack voltage. When the negative switch is disconnected, the fifth voltage drops. Therefore, when it is detected that the fifth voltage is less than the preset fourth threshold, it is determined that the negative switch is disconnected, the current battery state is abnormal, and an alarm signal is issued to prompt the staff that the battery is disconnected from the busbar.

[0065] As one of the optional embodiments, the step of obtaining the voltage of a switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, further includes:

[0066] Acquire a sixth voltage between a third end of the negative electrode switch close to the battery pack and a fourth end of the positive electrode switch far from the battery pack;

[0067] If the sixth voltage is less than the preset fifth threshold, it is determined that the battery pack switch is disconnected.

[0068] Specifically, similar to the method for determining whether the negative pole switch is disconnected, when the positive pole switch is disconnected, the sixth voltage drops. Therefore, when it is detected that the sixth voltage is less than the preset fifth threshold, it is determined that the positive pole switch is disconnected, the current battery status is abnormal, and an alarm signal is issued to prompt the staff that the battery is disconnected from the bus.

[0069] Among them, the preset thresholds can be set by those skilled in the art according to actual needs.

[0070] The abnormal battery status alarm method provided in the embodiment of the present invention can be applied to a battery pack disconnection busbar alarm device. For example, Figure 3 As shown, in actual application, the display of real-time sampling voltage can also be set to intuitively confirm that the battery voltage is in a normal state. When the battery is abnormal, the corresponding alarm indicator lights up to give a timely alarm. When any abnormal situation occurs, it means that the battery state is abnormal, and the system abnormal total alarm signal is displayed.

[0071] The embodiment of the present invention can improve the real-time performance and accuracy of the battery disconnection busbar alarm tester, without destroying or rewiring the original wiring of the substation, with low investment and high reliability. It only needs to add two identical voltage relays. For example, if the battery pack of a certain substation is composed of 104 batteries, the No. 1 voltage relay is connected in parallel to the positive electrode of the No. 1 battery and the negative electrode of the No. 52 battery; the No. 2 voltage relay is connected in parallel to the positive electrode of the No. 53 battery and the negative electrode of the No. 104 battery. When the battery pack has abnormalities such as malfunction, fuse abnormality, and battery cell open circuit, it can issue an alarm in the first time, prevent failures, and ensure safety with high accuracy.

[0072] Correspondingly, the present invention also provides a battery status abnormality alarm device, which can implement all the processes of the battery status abnormality alarm method in the above embodiment.

[0073] See also Figure 4 , Figure 4 1 is a schematic diagram of a battery abnormality alarm device provided by an embodiment of the present invention. The battery abnormality alarm device comprises:

[0074] A voltage acquisition module 401 is used to acquire a first voltage from the total positive pole of the battery pack to a first intermediate point, and a second voltage from the second intermediate point to the total negative pole of the battery pack; the number of batteries between the total positive pole of the battery pack and the first intermediate point is equal to the number of batteries between the second intermediate point and the total negative pole of the battery pack, and the number of batteries is not less than half of the total number of batteries in the battery pack;

[0075] A single battery abnormality alarm module 402, configured to issue an alarm signal of a battery cell open circuit if the voltage difference between the first voltage and the second voltage is greater than a preset first threshold;

[0076] The fuse abnormality alarm module 403 is used to obtain the voltage of the fuse between the battery pack and the DC bus, and determine whether the battery fuse is disconnected according to the voltage of the fuse. If so, an alarm signal of abnormal battery fuse status is issued;

[0077] The switch abnormality alarm module 404 is used to obtain the voltage of the switch between the battery pack and the DC bus, and determine whether the battery pack switch is disconnected according to the voltage of the switch. If so, an alarm signal of abnormal battery switch status is issued.

[0078] Preferably, if the total number of batteries in the battery pack is 2n, n≥1, the battery at the total positive electrode of the batteries is the first battery, the first midpoint is the negative electrode of the nth battery, and the second midpoint is the positive electrode of the (n+1)th battery.

[0079] Preferably, if the total number of batteries in the battery pack is 2n+1, n≥1, the battery at the total positive electrode of the batteries is the first battery, the first midpoint is the negative electrode of the n+1th battery, and the second midpoint is the positive electrode of the n+1th battery.

[0080] Preferably, the fuse comprises: a first fuse connected between the total positive electrode of the battery pack and the positive electrode of the DC bus, and a second fuse connected between the total negative electrode of the battery pack and the negative electrode of the DC bus;

[0081] The obtaining of the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, includes:

[0082] Acquire a third voltage between a first end of the first fuse close to the battery pack and a second end of the second fuse far from the battery pack;

[0083] If the third voltage is less than a preset second threshold, it is determined that the battery fuse is disconnected.

[0084] Preferably, the step of obtaining the voltage of a fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, further includes:

[0085] obtaining a fourth voltage between a third end of the first fuse far from the battery pack and a fourth end of the second fuse close to the battery pack;

[0086] If the fourth voltage is less than the preset third threshold, it is determined that the battery fuse is disconnected.

[0087] Preferably, the switch is divided into a positive switch and a negative switch;

[0088] The step of obtaining the voltage of a switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, includes:

[0089] Acquire a fifth voltage between a first end of the positive switch close to the battery pack and a second end of the negative switch far from the battery pack;

[0090] If the fifth voltage is less than a preset fourth threshold, it is determined that the battery pack switch is disconnected.

[0091] Preferably, the step of obtaining the voltage of a switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, further comprises:

[0092] Acquire a sixth voltage between a third end of the negative electrode switch close to the battery pack and a fourth end of the positive electrode switch far from the battery pack;

[0093] If the sixth voltage is less than the preset fifth threshold, it is determined that the battery pack switch is disconnected.

[0094] In specific implementation, the working principle, control process and technical effect achieved by the abnormal battery status alarm device provided in the embodiment of the present invention are the same as those of the abnormal battery status alarm method in the above embodiment, and will not be repeated here.

[0095] See also Figure 5 , Figure 5: is a structural block diagram of a computer device provided in an embodiment of the present invention, wherein the computer device comprises: a processor 501, a memory 502, and a computer program stored in the memory 502 and executable on the processor 501. When the processor 501 executes the computer program, the steps in the above-mentioned battery status abnormal alarm method embodiment are implemented. Alternatively, when the processor 501 executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0096] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory 502 and executed by the processor 501 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program in the computer device.

[0097] The computer device may include, but is not limited to, a processor 501 and a memory 502. Those skilled in the art will appreciate that the schematic diagram is merely an example of a computer device and does not constitute a limitation on the computer device, and may include more or fewer components than shown in the diagram, or may combine certain components, or different components, for example, the computer device may also include an input / output device, a network access device, a bus, etc.

[0098] The processor 501 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 501 is the control center of the computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0099] The memory 502 can be used to store the computer program and / or module. The processor 501 implements various functions of the computer device by running or executing the computer program and / or module stored in the memory 502 and calling the data stored in the memory 502. The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 502 can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0100] Wherein, if the module / unit integrated in the computer device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor 501. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0101] An embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the battery status abnormal alarm method described in any of the above embodiments.

[0102] The embodiments of the present invention provide a method, device, equipment and medium for abnormal battery status alarm, which have the beneficial effects of: by detecting the voltage at both ends and the middle point of the battery pack, an alarm is issued for abnormal battery pack cells, and by sampling the staggered voltage of the battery fuse and the battery switch, an alarm is issued for abnormal battery fuse and battery switch, which can achieve timely alarm when the battery is disconnected from the DC bus, notify the operation and maintenance personnel to eliminate hidden dangers in time, improve the accuracy and real-time performance of the abnormal battery status alarm, and is easy to use and highly practical.

[0103] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A battery status abnormality alarm method, characterized in that: include: Obtaining a first voltage from the total positive pole of the battery pack to the first midpoint, and a second voltage from the second midpoint to the total negative pole of the battery pack; the number of batteries between the total positive pole of the battery pack and the first midpoint is equal to the number of batteries between the second midpoint and the total negative pole of the battery pack, and the number of batteries is not less than half of the total number of batteries in the battery pack; If the voltage difference between the first voltage and the second voltage is greater than a preset first threshold, a warning signal of a battery cell open circuit is issued; Obtaining the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, and if so, issuing an alarm signal indicating that the battery fuse state is abnormal; The voltage of the switch between the battery pack and the DC bus is obtained, and it is determined whether the battery pack switch is disconnected according to the voltage of the switch. If so, an alarm signal indicating that the battery switch state is abnormal is issued.

2. The battery status abnormality alarm method according to claim 1, characterized in that: If the total number of batteries in the battery pack is 2n, n≥1, the battery at the total positive electrode of the batteries is the first battery, the first midpoint is the negative electrode of the nth battery, and the second midpoint is the positive electrode of the (n+1)th battery.

3. The battery status abnormality alarm method according to claim 1, characterized in that: If the total number of batteries in the battery pack is 2n+1, n≥1, the battery at the total positive electrode of the batteries is the first battery, the first midpoint is the negative electrode of the n+1th battery, and the second midpoint is the positive electrode of the n+1th battery.

4. The battery status abnormality alarm method according to claim 1, characterized in that: The fuse includes: a first fuse connected between the total positive electrode of the battery pack and the positive electrode of the DC bus, and a second fuse connected between the total negative electrode of the battery pack and the negative electrode of the DC bus; The obtaining of the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, includes: Acquire a third voltage between a first end of the first fuse close to the battery pack and a second end of the second fuse far from the battery pack; If the third voltage is less than a preset second threshold, it is determined that the battery fuse is disconnected.

5. The battery status abnormality alarm method according to claim 4, characterized in that: The step of obtaining the voltage of the fuse between the battery pack and the DC bus, and judging whether the battery fuse is disconnected according to the voltage of the fuse, further includes: obtaining a fourth voltage between a third end of the first fuse far from the battery pack and a fourth end of the second fuse close to the battery pack; If the fourth voltage is less than the preset third threshold, it is determined that the battery fuse is disconnected.

6. The battery status abnormality alarm method according to claim 1, characterized in that: The switch is divided into a positive switch and a negative switch; The step of obtaining the voltage of a switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, includes: Acquire a fifth voltage between a first end of the positive switch close to the battery pack and a second end of the negative switch far from the battery pack; If the fifth voltage is less than a preset fourth threshold, it is determined that the battery pack switch is disconnected.

7. The abnormal battery status alarm method according to claim 6, characterized in that: The step of obtaining the voltage of the switch between the battery pack and the DC bus, and judging whether the battery pack switch is disconnected according to the voltage of the switch, further includes: Acquire a sixth voltage between a third end of the negative electrode switch close to the battery pack and a fourth end of the positive electrode switch far from the battery pack; If the sixth voltage is less than the preset fifth threshold, it is determined that the battery pack switch is disconnected.

8. A battery status abnormality alarm device, characterized in that: include: A voltage acquisition module, used to acquire a first voltage from the total positive pole of the battery pack to a first intermediate point, and a second voltage from the second intermediate point to the total negative pole of the battery pack; the number of batteries between the total positive pole of the battery pack and the first intermediate point is equal to the number of batteries between the second intermediate point and the total negative pole of the battery pack, and the number of batteries is not less than half of the total number of batteries in the battery pack; A single battery abnormality alarm module, configured to issue an alarm signal of a battery cell open circuit if the voltage difference between the first voltage and the second voltage is greater than a preset first threshold; A fuse abnormality alarm module, used to obtain the voltage of the fuse between the battery pack and the DC bus, and determine whether the battery fuse is disconnected according to the voltage of the fuse, and if so, issue an alarm signal of abnormal battery fuse status; The switch abnormality alarm module is used to obtain the voltage of the switch between the battery pack and the DC bus, and determine whether the battery pack switch is disconnected according to the voltage of the switch. If so, an alarm signal of abnormal battery switch status is issued.

9. A computer device, characterized in that: It comprises a processor and a memory, wherein a computer program is stored in the memory, and the computer program is configured to be executed by the processor, and when the processor executes the computer program, the abnormal battery status alarm method as described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein when the device where the computer-readable storage medium is located executes the computer program, the battery status abnormality alarm method according to any one of claims 1 to 7 is implemented.

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