Storage battery thermal runaway management method and system and storage medium

Abstract

The invention provides a storage battery thermal runaway management method and system and a storage medium. The storage battery thermal runaway management method is used for thermal runaway management when a storage battery pack is charged and comprises the steps that the temperature of storage batteries in the storage battery pack is collected once every first preset time and recorded successively; under the condition that the temperature of the storage battery reaches a first temperature threshold value, an over-temperature protection charging early warning signal is sent out, the storage battery with the abnormal temperature is marked as an abnormal high-temperature single body, and the charging current of the storage battery pack is reduced to a first current threshold value; under the condition that the temperature of the abnormal high-temperature monomer rises to a second temperature threshold value, a thermal runaway early warning signal is sent out, and the abnormal high-temperature monomer is shunted; and under the condition that the temperature of the abnormally high-temperature monomer rises to a third temperature threshold value, a thermal runaway signal is sent out, and a charging loop of the storage battery pack is disconnected. According to the storage battery thermal runaway management method, the use safety of the storage battery pack can be improved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery thermal runaway management method. The present invention also relates to a battery thermal runaway management system based on the battery thermal runaway management method, and a computer-readable storage medium capable of implementing the battery thermal runaway management method. Background Art

[0002] In the key systems of the power industry, the stable operation of the DC system is an important guarantee to ensure the uninterrupted functions of power transmission, distribution, communication and command. In order to achieve this goal, series-connected battery packs are widely used as the main power supply or backup power supply, especially in key links such as communication power supply and DC dispatching and control systems. These systems provide sufficient and reliable backup power support through carefully designed battery pack configurations, such as 24 2V battery cells in series for communication power supply, and 104 larger 2V battery cells in series for DC dispatching and control systems.

[0003] However, in a series-connected battery pack, due to the uneven initial performance of each battery cell, different degrees of degradation during use, or internal defects in the battery cells, the charging voltages of the cells in the charging stage of the battery pack will be different, and then the cells with a greater degree of degradation will experience accelerated heating. When the heating rate of the battery cells exceeds their natural cooling rate, the battery will enter a thermal runaway state. When the cell temperature reaches the shell deformation limit, the battery shell may deform and crack. The battery electrolyte that loses the protection of the shell will flow out quickly, causing the battery cell to open circuit. The flowing electrolyte may cause corrosion, poisoning, and fire hazards. When the cell temperature reaches the deformation limit of the internal insulation device and the plate grid, it may cause an internal short circuit, which in turn causes the battery to quickly short-circuit discharge or even explode. The existing thermal runaway management scheme lacks multi-level temperature monitoring and dynamic adjustment strategies, and it is difficult to effectively reduce the risk of thermal runaway, which is not conducive to improving the safety of battery pack use. Summary of the invention

[0004] In view of this, the present invention aims to provide a battery thermal runaway management method to improve the safety of battery packs.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A battery thermal runaway management method is used for thermal runaway management during battery pack charging, the method comprising:

[0007] Collecting the temperature of the batteries in the battery pack once every first preset time and recording it successively;

[0008] When the temperature of the storage battery reaches a first temperature threshold, an over-temperature protection charging warning signal is issued, the storage battery with abnormal temperature is marked as an abnormally high temperature cell, and the charging current of the storage battery pack is reduced to a first current threshold;

[0009] When the temperature of the abnormally high temperature monomer rises to a second temperature threshold, a thermal runaway warning signal is issued to divert the abnormally high temperature monomer;

[0010] When the temperature of the abnormally high temperature cell rises to a third temperature threshold, a thermal runaway signal is issued to disconnect the charging circuit of the battery pack.

[0011] Furthermore, when the temperature of the battery reaches a first temperature threshold, an over-temperature protection charging warning is issued, the battery with abnormal temperature is marked as an abnormally high temperature cell, and the charging current of the battery pack is reduced to a first current threshold, including: recording the charging current when the battery temperature reaches the first temperature threshold as I, and reducing the charging current of the battery pack to the first current threshold; changing the temperature collection time of the abnormally high temperature cell to a second preset time; and when the temperature of the abnormally high temperature cell gradually decreases, gradually increasing the current of the second current threshold on the basis of the first current threshold until the charging current returns to I.

[0012] Furthermore, when the temperature of the battery reaches a first temperature threshold, an over-temperature protection charging warning is issued, the battery with abnormal temperature is marked as an abnormally high temperature cell, and the charging current of the battery pack is reduced. It also includes: when the temperature of the abnormally high temperature cell gradually increases, real-time current is obtained, and the current of a third current threshold is reduced based on the real-time current until the charging current reaches the first current threshold.

[0013] Further, the first current threshold is I / N, wherein I is the charging current of the battery when it reaches the first temperature threshold, and N is the protection coefficient, 10≤N≤20; and / or, the second current threshold is I / M, wherein I is the charging current of the battery when it reaches the first temperature threshold, and M is the second protection coefficient, 5≤M≤20; and / or, the third current threshold is I / M, wherein I is the charging current of the battery when it reaches the first temperature threshold, and M is the second protection coefficient, 5≤M≤20; and / or, the range of the first preset time is 1s-2s; and / or, the range of the second preset time is 0.5s-1s.

[0014] Furthermore, when the temperature of the battery reaches the second temperature threshold, the battery with abnormal temperature is marked as the abnormally high temperature cell, the charging current of the battery pack is reduced to the first current threshold, and the abnormally high temperature cell is diverted; the temperature collection time of the abnormally high temperature cell is changed to the second preset time, and when the temperature of the abnormally high temperature cell is gradually reduced, the current of the second current threshold is gradually increased on the basis of the first current threshold until the charging current is restored to I.

[0015] Furthermore, when the temperature of the abnormally high temperature monomer gradually decreases and when the temperature of the abnormally high temperature monomer gradually increases, the real-time current is obtained, and the current of the third current threshold is reduced based on the real-time current until the charging current reaches the first current threshold.

[0016] Further, the first current threshold is I / N, wherein I is the charging current of the battery when it reaches the first temperature threshold, and N is the protection coefficient, 10≤N≤20; and / or, the second current threshold is I / M, wherein I is the charging current of the battery when it reaches the first temperature threshold, and M is the second protection coefficient, 5≤M≤20; and / or, the third current threshold is I / M, wherein I is the charging current of the battery when it reaches the first temperature threshold, and M is the second protection coefficient, 5≤M≤20; and / or, the range of the first preset time is 1s-2s; and / or, the range of the second preset time is 0.5s-1s.

[0017] Furthermore, when the temperature of the battery reaches the third temperature threshold, a thermal runaway signal is issued to disconnect the charging circuit of the battery pack.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The battery thermal runaway management method described in the present invention monitors the temperature change of the battery before thermal runaway, and sets a first temperature threshold, a second temperature threshold and a third temperature threshold. By reducing the charging current of the battery pack, the charging current of the abnormally high temperature cells can be reduced while ensuring the charging of other batteries except the abnormally high temperature cells, thereby reducing the risk of thermal runaway of the abnormally high temperature cells, and the charging circuit can be directly disconnected when the abnormally high temperature cells reach the set third temperature threshold. By sending different signals for the first temperature threshold, the second temperature threshold and the third temperature threshold, it is helpful to prompt the operating personnel to perform different processing methods, which helps to improve the safety of the battery pack.

[0020] In addition, by changing the temperature acquisition time to the second preset time, the temperature of the battery can be monitored in real time, which helps to better ensure the charging of other batteries in the battery pack. By judging the temperature of the abnormally high temperature monomer and increasing the charging current when the temperature of the abnormally high temperature monomer decreases, it helps to restore the normal charging situation and facilitates the design implementation. When it is detected that the temperature of the abnormally high temperature monomer continues to rise, the charging current can be reduced, which helps to prevent the temperature increase caused by the increase in the charging current. The first current threshold is I / N, 10≤N≤20, which helps to quickly reduce the charging current and prevent the thermal runaway of the abnormally high temperature monomer under the normal charging current, which is conducive to the design implementation. The second current threshold is I / M, 5≤M≤20, which is conducive to ensuring the charging of other batteries. The third current threshold is I / M, 5≤M≤20, which helps to slowly restore the charging current while monitoring the temperature decrease, and prevent the risk of thermal runaway caused by the increase in the charging current. The second preset time range is smaller than the first preset time range, which helps to shorten the temperature detection cycle, and is conducive to quickly judging the temperature change of the battery, which is conducive to the design implementation.

[0021] In addition, by reducing the battery charging current to the first current threshold and shunting the abnormally high temperature cells when the battery temperature is directly detected to have reached the second temperature threshold, it is helpful to further reduce the charging current of abnormally high temperature cells while ensuring the charging current of other batteries, which is beneficial to reducing the risk of thermal runaway of abnormally high temperature cells. By increasing the charging current when the temperature of abnormally high temperature cells is gradually reduced, it is helpful to reduce misjudgments and improve the stability of battery pack charging, which is helpful for design implementation. When it is detected that the temperature of abnormally high temperature cells continues to rise, the charging current can be reduced, which helps prevent the temperature increase caused by increasing the charging current. By disconnecting the charging circuit of the battery pack and issuing a thermal runaway signal when the third temperature threshold is directly detected, it helps prevent the further occurrence of thermal runaway, and prompts the operator to deal with the thermal runaway of the battery pack through the thermal runaway signal, which is beneficial for design implementation.

[0022] The present invention also proposes a battery thermal runaway management system, which is provided with a memory and a processor; the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the battery thermal runaway management method as described above is implemented.

[0023] The present invention also proposes a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the battery thermal runaway management method as described above can be implemented.

[0024] The battery thermal runaway management system and computer-readable storage medium described in the present invention have the same beneficial effects as the battery thermal runaway management method described above compared to the prior art, so they are not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a flow chart of a battery thermal runaway management method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0028] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0029] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0030] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0031] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0032] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0034] Embodiment 1

[0035] The present embodiment relates to a method for managing thermal runaway of a battery, so as to improve the safety of a battery pack by optimizing the steps of managing thermal runaway of the battery.

[0036] The battery thermal runaway management method in this embodiment is used for thermal runaway management when the battery pack is charging. Before introducing the battery thermal runaway management method in this embodiment, it is necessary to briefly introduce the relevant concepts involved in this embodiment. The battery pack in this embodiment is composed of multiple batteries connected in series. The poles of the batteries in this embodiment are all provided with temperature acquisition devices. The charging current of the battery pack in this embodiment can be obtained by, for example, an ammeter connected to the charging circuit of the battery pack.

[0037] In terms of overall conception, Figure 1 As shown, the battery thermal runaway management method in this embodiment includes the following steps:

[0038] Step S1, collecting the temperature of the batteries in the battery pack once every first preset time, and recording it one by one.

[0039] Among them, in this step S1, the temperature of the battery is regularly collected and recorded to facilitate comparison and judgment of the temperature change of the battery. The first preset time ranges from 1s to 2s. Preferably, the first preset time is 2s in this embodiment.

[0040] Step S2: When the temperature of the battery reaches a first temperature threshold, an over-temperature protection charging warning signal is issued, the battery with abnormal temperature is marked as an abnormally high temperature cell, and the charging current of the battery pack is reduced to the first current threshold.

[0041] Among them, in step S2, by sending out an over-temperature protection charging warning signal, it is helpful for operators to find out the abnormal charging on site according to the signal and deal with it in time. Specifically, step S2 in this embodiment also includes the following steps:

[0042] Step S21, recording the charging current when the battery temperature reaches the first temperature threshold as I, and reducing the charging current of the battery pack to the first current threshold.

[0043] Among them, in this step S21, the first current threshold is I / N, wherein I is the charging current of the battery when it reaches the first temperature threshold, and N is the protection factor, 10≤N≤20. In the present embodiment, N may be, for example, 10, 11, 12, 13, 15, or 20, and it is only necessary to satisfy the requirement that the charging current can be reduced quickly, so that the first current threshold is I / N, 10≤N≤20, which helps to quickly reduce the charging current and prevent thermal runaway of abnormally high temperature cells under normal charging current, thereby facilitating design implementation.

[0044] Step S22: changing the temperature collection time of the abnormally high temperature monomer to a second preset time, and gradually increasing the current of the second current threshold on the basis of the first current threshold when the temperature of the abnormally high temperature monomer gradually decreases, until the charging current returns to I.

[0045] Among them, in this step S22, the second current threshold is I / M, where I is the charging current of the battery when it reaches the first temperature threshold, and M is the second protection factor, 5≤M≤20. In this embodiment, M can be, for example, 5, 10, 15, or 20. The range of the second preset time is 0.5s-1s. When the temperature of the abnormally high temperature monomer collected is gradually reduced for 7 consecutive times, the charging current is increased once, so that the second current threshold is I / M, 5≤M≤20, which is beneficial to ensure the charging of other batteries, so that the second preset time range is smaller than the first preset time range, which helps to shorten the temperature detection cycle, and is beneficial to quickly determine the temperature change of the battery, which is beneficial to design implementation.

[0046] Step S23, when the temperature of the abnormally high temperature cell gradually increases, obtain the real-time current, and reduce the current of the third current threshold on the basis of the real-time current until the charging current returns to the first current threshold.

[0047] Wherein, in this step S23, the third current threshold is I / M, wherein I is the charging current of the battery when it reaches the first temperature threshold, M is the second protection factor, 5≤M≤20, and the real-time current is the charging current when current adjustment is required. Specifically, when it is detected that the temperature of the abnormally high temperature cell increases after the charging current is increased, the charging current is stopped from being increased, and the charging current of the third current threshold is reduced on the basis of the charging current when the temperature of the abnormally high temperature cell is increased. When the temperature of the abnormally high temperature cell is gradually increased for 7 consecutive times, the charging current of the third current threshold is continued to be reduced on the basis of the charging current after the temperature of the abnormally high temperature cell is gradually increased for 7 consecutive times, until the charging current is reduced to the first current threshold, so that the third current threshold is I / M, which helps to quickly reduce the charging current after the monitored temperature increases, and prevent the risk of thermal runaway caused by the increase in charging current.

[0048] It is worth mentioning that in order to ensure the charging status of other batteries, after the charging current returns to I, the current will no longer be increased.

[0049] In step S21-step S23, by reducing the charging current of the battery pack and changing the temperature collection time to the second preset time, the temperature rise rate of the single cell can be quickly controlled by quickly reducing the charging current of the battery pack, and then by real-time monitoring of the battery temperature, it is determined whether the charging current can be gradually increased, and finally a maximum charging current is found to ensure that the temperature of the single cell does not continue to rise abnormally, thereby better protecting the charging of other batteries in the battery pack without causing accidents.

[0050] Step S3: When the temperature of the abnormally high temperature monomer rises to a second temperature threshold, a thermal runaway warning signal is issued to divert the abnormally high temperature monomer.

[0051] Among them, in step S3, when the temperature of the abnormally high temperature monomer gradually rises to the second temperature threshold, a thermal runaway warning signal is issued to prompt the operator, and the charging current of the abnormally high temperature monomer is further reduced by shunting the abnormally high temperature monomer. At the same time, the temperature of the abnormally high temperature monomer continues to be monitored according to steps S22 and S23, and the charging current of the abnormally high temperature monomer is controlled. In this embodiment, the method of shunting the abnormally high temperature monomer can be, for example, an adjustable resistor that is controlledly connected in parallel to each battery, and the access resistance of the adjustable resistor is adjusted according to the charging current of the battery pack, and the abnormally high temperature monomer is shunted by parallel shunting. At the same time, the adjustable controlled access can ensure that the normal use of the battery pack is not affected.

[0052] In this embodiment, since there is a time interval for collecting the temperature, the collected temperature may directly reach the second temperature threshold. When the collected temperature directly reaches the second temperature threshold, step S3 in this embodiment further includes the following steps:

[0053] Step S31: When the temperature of the battery directly reaches the second temperature threshold, the battery with abnormal temperature is marked as an abnormally high temperature cell, the charging current of the battery pack is reduced to the first current threshold, and the abnormally high temperature cell is diverted.

[0054] Among them, in this step S31, the first current threshold is I / N, wherein I is the charging current of the battery when it reaches the first temperature threshold. In the present embodiment, N may be, for example, 10, 11, 12, 13, 15, or 20, and it is only necessary to satisfy the requirement that the charging current can be reduced quickly, so that the first current threshold is I / N, which helps to quickly reduce the charging current and prevent thermal runaway of abnormally high temperature cells under normal charging current, thereby facilitating design implementation.

[0055] Step S32: changing the temperature collection time of the abnormally high temperature monomer to a second preset time, and gradually increasing the current of the second current threshold on the basis of the first current threshold when the temperature of the abnormally high temperature monomer gradually decreases, until the charging current returns to I.

[0056] Among them, in this step S32, the second current threshold is I / M, wherein I is the charging current of the battery when it reaches the first temperature threshold, M is the second protection factor, 5≤M≤20, and the second preset time range is 0.5s-1s. When the temperature of the abnormally high temperature cell collected is gradually reduced for 7 consecutive times, the charging current is increased once so that the second current threshold is I / 5, which is beneficial to ensure the charging of other batteries, and makes the second preset time range smaller than the first preset time range, which helps to shorten the temperature detection cycle, and is beneficial to quickly judge the temperature change of the battery, which is beneficial to design implementation.

[0057] Step S33: when the temperature of the abnormally high temperature cell gradually increases, obtain the real-time current, and reduce the current of the third current threshold on the basis of the real-time current until the charging current reaches the first current threshold.

[0058] Wherein, in this step S33, the third current threshold is I / M, wherein I is the charging current of the battery when it reaches the first temperature threshold, M is the second protection factor, 5≤M≤20, and the real-time current is the charging current when current adjustment is required. Specifically, when it is detected that the temperature of the abnormally high temperature cell increases after the charging current is increased, the charging current is stopped from being increased, and the charging current of the third current threshold is reduced on the basis of the charging current when the temperature of the abnormally high temperature cell is increased. When the temperature of the abnormally high temperature cell is gradually increased for 7 consecutive times, the charging current of the third current threshold is continued to be reduced on the basis of the charging current after the temperature of the abnormally high temperature cell is gradually increased for 7 consecutive times, until the charging current is reduced to the first current threshold, so that the third current threshold is I / M, which helps to quickly reduce the charging current when the monitored temperature increases, and prevent the risk of thermal runaway caused by the increase in charging current.

[0059] In step S31-step S33, when it is directly detected that the temperature of the battery reaches the second temperature threshold, by reducing the charging current of the battery pack and changing the temperature acquisition time to the second preset time, the temperature rise rate of the single cell can be quickly controlled by quickly reducing the charging current of the battery pack, and then by real-time monitoring of the battery temperature, it is determined whether the charging current can be gradually increased, and finally a maximum charging current is found to ensure that the temperature of the single cell does not continue to rise abnormally, thereby better protecting the charging of other batteries in the battery pack without causing accidents.

[0060] Step S4: When the temperature of the abnormally high temperature cell rises to a third temperature threshold, a thermal runaway signal is issued to disconnect the charging circuit of the battery pack.

[0061] In step S4, since there is a time interval for collecting the temperature, when the collected battery temperature directly reaches the third temperature threshold, a thermal runaway signal is issued and the charging circuit of the battery pack is directly disconnected.

[0062] It is worth mentioning that the temperature thresholds of different batteries are set differently. In this embodiment, a lead-acid battery is taken as an example. For the lead-acid battery, the range of the first temperature threshold is 50°C-60°C, the range of the second temperature threshold is 65°C-75°C, and the range of the third temperature threshold is 80°C-85°C. In order to avoid misjudgment, after the charging current of the battery is restored to I and the temperature of the battery is normal, manual determination is required to eliminate the thermal runaway warning signal and the thermal runaway signal.

[0063] The battery thermal runaway management method of the present embodiment monitors the temperature change of the battery before thermal runaway, and sets a first temperature threshold, a second temperature threshold and a third temperature threshold. By reducing the charging current of the battery pack, the charging current of the abnormally high temperature cells can be reduced while ensuring the charging of other batteries except the abnormally high temperature cells, thereby reducing the risk of thermal runaway of the abnormally high temperature cells, and the charging circuit can be directly disconnected when the abnormally high temperature cells reach the set third temperature threshold. By sending different signals for the first temperature threshold, the second temperature threshold and the third temperature threshold, it is helpful to prompt the operating personnel to perform different processing methods, which helps to improve the safety of the battery pack.

[0064] Embodiment 2

[0065] The present embodiment relates to a battery thermal runaway management system. The battery thermal runaway management system in the present embodiment is provided with a memory and a processor.

[0066] The memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the battery thermal runaway management method in the first embodiment is implemented.

[0067] It should be noted that the above-mentioned memory and processor can adopt existing circuit modules with data storage, processing and input / output. In addition, in addition to the above-mentioned memory and processor, of course, other modules such as data temporary storage and data communication are usually provided in the control system to temporarily store the relevant data information and other related processing information involved, and to realize the connection and communication between other related modules.

[0068] For the management system of this embodiment, the corresponding method in specific use can refer to the relevant description in the first embodiment.

[0069] Moreover, the battery thermal runaway management system in this embodiment, by implementing the battery thermal runaway management method in Example 1, monitors the temperature change of the battery before thermal runaway, and sets the first temperature threshold, the second temperature threshold and the third temperature threshold. By reducing the charging current of the battery pack, it is possible to reduce the charging current of the abnormally high temperature cells while ensuring the charging of other batteries except the abnormally high temperature cells, thereby reducing the risk of thermal runaway of the abnormally high temperature cells, and can directly disconnect the charging circuit when the abnormally high temperature cells reach the set third temperature threshold. By sending different signals for the first temperature threshold, the second temperature threshold and the third temperature threshold, it is helpful to prompt the operating personnel to perform different processing methods, which helps to improve the safety of the battery pack.

[0070] Embodiment 3

[0071] This embodiment relates to a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the battery thermal runaway management method in the first embodiment can be implemented.

[0072] The computer-readable storage medium of this embodiment is generally a memory, and includes permanent and non-permanent, removable and non-removable media, and can implement information storage by any method or technology.

[0073] In addition, the above information can be computer-readable instructions, data structures, modules of programs or other data. Examples of computer-readable storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or other memory technology, compact disk read-only memory (ID-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery thermal runaway management method, used for thermal runaway management during battery pack charging, characterized in that: The method includes: Collecting the temperature of the batteries in the battery pack once every first preset time and recording it successively; When the temperature of the storage battery reaches a first temperature threshold, an over-temperature protection charging warning signal is issued, the storage battery with abnormal temperature is marked as an abnormally high temperature cell, and the charging current of the storage battery pack is reduced to a first current threshold; When the temperature of the abnormally high temperature monomer rises to a second temperature threshold, a thermal runaway warning signal is issued to divert the abnormally high temperature monomer; When the temperature of the abnormally high temperature cell rises to a third temperature threshold, a thermal runaway signal is issued to disconnect the charging circuit of the battery pack.

2. The battery thermal runaway management method according to claim 1, characterized in that: When the temperature of the storage battery reaches a first temperature threshold, issuing an over-temperature protection charging warning, marking the storage battery with abnormal temperature as an abnormally high temperature monomer, and reducing the charging current of the storage battery pack to the first current threshold, includes: Recording the charging current when the battery temperature reaches a first temperature threshold as I, and reducing the charging current of the battery pack to the first current threshold; Changing the temperature collection time of the abnormally high temperature monomer to a second preset time; When the temperature of the abnormally high temperature cell is gradually reduced, the current of the second current threshold is gradually increased on the basis of the first current threshold until the charging current is restored to I.

3. The battery thermal runaway management method according to claim 2, characterized in that: When the temperature of the storage battery reaches a first temperature threshold, an over-temperature protection charging warning is issued, the storage battery with abnormal temperature is marked as an abnormally high temperature monomer, and the charging current of the storage battery pack is reduced, and the method further includes: When the temperature of the abnormally high temperature cell is gradually increased, a real-time current is obtained, and the current of the third current threshold is reduced on the basis of the real-time current until the charging current reaches the first current threshold.

4. The battery thermal runaway management method according to claim 3, characterized in that: The first current threshold is I / N, where I is the charging current of the battery when it reaches the first temperature threshold, N is the protection factor, 10≤N≤20; and / or, The second current threshold is I / M, where I is the charging current of the battery when the battery reaches the first temperature threshold, M is the second protection factor, 5≤M≤20; and / or, The third current threshold is I / M, where I is the charging current of the battery when it reaches the first temperature threshold, M is the second protection factor, 5≤M≤20; and / or, The first preset time ranges from 1s to 2s; and / or, The second preset time ranges from 0.5s to 1s.

5. The battery thermal runaway management method according to claim 1, characterized in that: When the temperature of the storage battery reaches the second temperature threshold, marking the storage battery with abnormal temperature as the abnormally high temperature cell, reducing the charging current of the storage battery pack to the first current threshold, and shunting the abnormally high temperature cell; The temperature collection time of the abnormally high temperature monomer is changed to a second preset time. When the temperature of the abnormally high temperature monomer is gradually reduced, the current of the second current threshold is gradually increased on the basis of the first current threshold until the charging current is restored to I.

6. The method for managing thermal runaway of a battery according to claim 5, characterized in that: When the temperature of the abnormally high temperature cell is gradually increased, a real-time current is obtained, and the current of the third current threshold is reduced on the basis of the real-time current until the charging current reaches the first current threshold.

7. The battery thermal runaway management method according to claim 6, characterized in that: The first current threshold is I / N, where I is the charging current of the battery when the battery reaches the first temperature threshold, N is the first protection factor, 10≤N≤20; and / or, The second current threshold is I / M, where I is the charging current of the battery when the battery reaches the first temperature threshold, M is the second protection factor, 5≤M≤20; and / or, The third current threshold is I / M, where I is the charging current of the battery when it reaches the first temperature threshold, M is the second protection factor, 5≤M≤20; and / or, The first preset time ranges from 1s to 2s; and / or, The second preset time ranges from 0.5s to 1s.

8. The method for managing thermal runaway of a battery according to any one of claims 1 to 7, characterized in that: The method includes: When the temperature of the storage battery reaches the third temperature threshold, a thermal runaway signal is issued to disconnect the charging circuit of the storage battery pack.

9. A battery thermal runaway management system, characterized in that: The battery thermal runaway management system is provided with a memory and a processor; The memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the battery thermal runaway management method according to any one of claims 1 to 8 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the battery thermal runaway management method according to any one of claims 1 to 8 can be implemented.

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