CN114895201A - Battery monitoring method and device - Google Patents

Abstract

The invention discloses a battery monitoring method and device. The monitoring method includes: acquiring the expansion pressure between adjacent cells in at least one battery module; according to the expansion pressure between adjacent cells in the at least one battery module The parameter information of the parameter determines whether to issue a reminder message; the parameter information of the inflation pressure includes at least one of the magnitude and the rate of change of the inflation pressure. By monitoring the expansion pressure between adjacent cells in the battery module, it is possible to collect the changes in the expansion force inside the module during the entire life cycle to carry out thermal runaway warning and alarm. According to the expansion pressure between adjacent cells in the battery module It can monitor the battery and give early warning to improve the timeliness and accuracy of the early warning. It can intervene in advance for the early warning and alarm vehicles, improve the safety performance of the entire vehicle life cycle, and reduce accidents caused by battery damage.

Description

Battery monitoring method and device

technical field

The invention belongs to the technical field of automobiles, and in particular relates to a battery monitoring method and device.

Background technique

With the continuous maturity of lithium battery technology and the strong support of national policies, the development of new energy vehicles is very rapid, but current electric vehicles always face problems such as insufficient cruising range and safety. It is also gradually increasing, and the market share is also gradually increasing, and the importance of safety issues has become increasingly prominent. Recently, the frequent occurrence of electric vehicle safety accidents, mostly caused by the fire of the power battery, makes the thermal runaway safety of the new energy vehicle industry the focus of attention.

The reasons for the failure of lithium-ion batteries are very complex, but they can be mainly divided into two aspects: self-defect and abuse. After a long period of accumulation, thermal runaway of the battery system will occur, endangering the life and property of passengers. At present, from the cell level, module level, battery system level, and vehicle level, the safety assurance of the battery system's entire life cycle is being actively explored, but there is no systematic safety research for the entire life cycle. At present, the pre-warning and alarm methods commonly used by OEMs are only realized by monitoring the voltage and temperature of the battery. There are still a large number of accidents that cannot be timely, or even cannot be pre-alarmed and alarmed at all, which cannot achieve a better thermal runaway monitoring purpose.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a battery monitoring method and device to solve the problems of untimely and inaccurate monitoring and early warning of existing batteries.

In a first aspect, an embodiment of the present invention provides a method for monitoring a battery, including:

obtaining the expansion pressure between adjacent cells in at least one battery module;

Determine whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module;

The parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure.

Wherein, the step of determining whether to send out the reminder information according to the parameter information of the expansion pressure between the adjacent cells in the at least one battery module includes:

Determine whether to issue a reminder message according to the magnitude of the expansion pressure between adjacent cells in at least one battery module;

When the magnitude of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset pressure value, a reminder message is issued.

Wherein, the step of determining whether to send out the reminder information according to the parameter information of the expansion pressure between the adjacent cells in the at least one battery module includes:

Determine whether to issue a reminder message according to the rate of change of the expansion pressure between adjacent cells in at least one battery module;

When the rate of change of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset rate, a reminder message is issued.

Wherein, the step of obtaining the expansion pressure between adjacent cells in at least one battery module includes:

Obtain the expansion pressure between adjacent cells in multiple battery modules;

The step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module includes:

Whether to issue a reminder message is determined according to the pressure deviation between the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules ;

When the pressure deviation between the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules is greater than or equal to the preset deviation When the amount is reached, make sure to send out a reminder message.

Wherein, the step of obtaining the expansion pressure between adjacent cells in at least one battery module includes:

Obtain the expansion pressure between adjacent cells in multiple battery modules;

The step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module includes:

According to the amount of variation deviation between the rate of change of the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the rate of change of the expansion pressure between the adjacent cells in the remaining battery modules , to determine whether to issue a reminder message;

The amount of variation deviation between the rate of change of the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the rate of change of the expansion pressure between the adjacent cells in the remaining battery modules When it is greater than or equal to the preset variation deviation, it is determined to issue a reminder message.

Wherein, the step of obtaining the expansion pressure between adjacent cells in at least one battery module includes:

Obtain the expansion pressure between adjacent cells in the same battery module at the first time and the second time, and the first time is earlier than the second time;

The step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module includes:

When the expansion pressure between adjacent cells in one battery module at the second time is lower than the expansion pressure between adjacent cells in the same battery module at the first time, it is determined to send a reminder message.

In a second aspect, an embodiment of the present invention provides a battery monitoring device, including:

an acquisition module for acquiring the expansion pressure between adjacent cells in at least one battery module;

a reminder module, configured to determine whether to issue reminder information according to parameter information of the expansion pressure between adjacent cells in at least one battery module;

The parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure.

Wherein, the reminder module is used to determine whether to issue reminder information according to the magnitude of the expansion pressure between adjacent cells in at least one battery module;

The reminder module is used to issue reminder information when the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset pressure value; or

Wherein, the reminder module is configured to determine whether to issue reminder information according to the rate of change of the expansion pressure between adjacent cells in at least one battery module;

The reminder module is used to issue reminder information when the rate of change of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset rate; or

Wherein, the acquisition module is used to acquire the expansion pressure between adjacent cells in the plurality of battery modules;

The reminder module is used for the pressure deviation between the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent cells in the remaining battery modules amount to determine whether to issue a reminder;

The reminder module is used for the pressure deviation between the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent cells in the remaining battery modules When the amount is greater than or equal to the preset deviation amount, it is determined to issue a reminder message; or

Wherein, the acquisition module is used to acquire the expansion pressure between adjacent cells in the plurality of battery modules;

The reminder module is used for the change rate of the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the change of the expansion pressure between the adjacent cells in the remaining battery modules The change deviation between the rates to determine whether to issue a reminder message;

The reminder module is used when the rate of change of the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the change of the expansion pressure between the adjacent cells in the remaining battery modules When the variation deviation between the rates is greater than or equal to the preset variation deviation, a reminder message is determined to be issued; or

Wherein, the acquisition module is used to acquire the expansion pressure between adjacent cells in the same battery module at a first time and a second time, and the first time is earlier than the second time;

The reminder module is used for, when the expansion pressure between adjacent cells in one battery module at the second moment is less than the expansion pressure between adjacent cells in the same battery module at the first moment, Make sure to send a reminder message.

In a third aspect, an embodiment of the present invention provides an electronic device, including a processor and a memory, where the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor The steps of implementing the methods described in the above embodiments.

In a fourth aspect, an embodiment of the present invention provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the methods described in the foregoing embodiments are implemented .

The battery monitoring method according to the embodiment of the present invention includes: acquiring the expansion pressure between adjacent cells in at least one battery module; Reminder information; the parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure. By monitoring the expansion pressure between adjacent cells in the battery module, it is possible to collect the changes in the expansion force within the module during the entire life cycle for thermal runaway warning and alarm. According to the expansion pressure between adjacent cells in the battery module It can monitor the battery and give early warning, improve the timeliness and accuracy of early warning, and intervene in advance for early warning and alarm vehicles, improve the safety performance of the entire vehicle life cycle, and reduce accidents caused by battery damage.

Description of drawings

Fig. 1 is a connection schematic diagram of monitoring device;

Fig. 2 is a structural schematic diagram of a battery;

Fig. 3 is an exploded schematic diagram of the battery;

Fig. 4 is a schematic diagram of the rate of change of the expansion force between adjacent cells in the battery;

Fig. 5 is a schematic diagram of the failure of the battery structure;

6 is a schematic diagram of the variation of the expansion force between adjacent cells in different battery modules;

reference number

Cell 1; End Plate 2; Busbar 3; Side Plate 4;

acquisition module 10; pressure sensor 11;

Reminder module 20 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second" and the like in the description and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances so that embodiments of the invention can be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

The following describes the battery monitoring method provided by the embodiment of the present invention in detail through specific embodiments and application scenarios shown in FIGS. 1 to 6 .

The monitoring method of the battery according to the embodiment of the present invention includes:

obtaining the expansion pressure between adjacent cells in at least one battery module;

Whether to issue a reminder message is determined according to parameter information of the expansion pressure between adjacent cells in at least one battery module; the parameter information of the expansion pressure includes at least one of a magnitude and a rate of change of the expansion pressure. The reminder information may include sound information, photoelectric information, vibration information, text or pattern information, and the like.

In the battery monitoring method of the embodiment of the present invention, by monitoring the expansion pressure between adjacent cells in the battery module, the change of the expansion force inside the module in the whole life cycle can be collected to carry out thermal runaway warning and alarm. The expansion pressure between adjacent cells in the module is used to monitor the battery and give early warning, improve the timeliness and accuracy of early warning, and can intervene in advance for early warning and warning vehicles, improve the safety performance of the entire vehicle life cycle, and reduce battery damage. brought about by the accident. It can significantly improve the early warning and accurate coverage of the battery system. Based on the thermal runaway heat generation mechanism, using the module expansion force signal for early warning has the advantages of high sensitivity, strong reliability and high early warning. Before the middle of the aging process, the voltage and temperature of the cell may not change significantly, but the pressure inside the cell has changed. Through the change in the internal pressure of the module, the abnormality can be identified in advance, early warning can be carried out, and the risk of thermal runaway can be reduced. The out-of-control alarm has an effect earlier than the voltage and temperature alarms. It can monitor the vehicles in the non-working (parking and standing) state to make up for the drawbacks that the current parking state cannot be forewarned.

In some embodiments, the step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in the at least one battery module may include:

Determine whether to issue a reminder message according to the magnitude of the expansion pressure between adjacent cells in at least one battery module;

When the magnitude of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset pressure value, a reminder message is issued. When the cells in the battery module are abnormal, the expansion pressure between adjacent cells in the battery module will change, and the expansion pressure between adjacent cells in the battery module will increase. When the size of the expansion pressure between adjacent cells in the module is greater than or equal to the preset pressure value, a reminder message will be issued, so that the user can be reminded in a timely and accurate manner, so that the user can intervene and deal with it in time, and reduce the damage caused by battery damage. ACCIDENT.

In other embodiments, the step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in the at least one battery module may include:

Determine whether to issue a reminder message according to the rate of change of the expansion pressure between adjacent cells in at least one battery module;

When the rate of change of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset rate, a reminder message is issued.

When the cells in the battery module are abnormal, the change rate of the expansion pressure between adjacent cells in the battery module will change, and the change rate of the expansion pressure between adjacent cells in the battery module will suddenly change Increase, when the rate of change of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to the preset rate, a reminder message is issued, so that the user can be reminded in a timely and accurate manner, so that the user can intervene and deal with it in time , reduce the accident caused by battery damage. The thermal runaway alarm can be performed by abnormal changes in the rate of change of the expansion pressure between adjacent cells in the battery module.

During the application process, as shown in Figure 4, when the cells in the battery module are thermally out of control, a significant abnormality in the expansion force inside the module is monitored at this time. Assuming that the battery module is normal, the average increase rate of the internal expansion force of the battery module during charging is V0; when the battery cell is abnormal, the average increase rate of the internal expansion force of the battery module is V1, and the abnormal alarm coefficient can be k. When V1>k When *V0, the battery system can alarm, the module is abnormal, and the user can be reminded in time.

In an embodiment of the present invention, the step of acquiring the expansion pressure between adjacent cells in the at least one battery module may include:

Obtain the expansion pressure between adjacent cells in multiple battery modules;

The step of determining whether to issue a reminder message according to the parameter information of the expansion pressure between adjacent cells in the at least one battery module may include:

Whether to issue a reminder message is determined according to the pressure deviation between the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules ;

When the pressure deviation between the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules is greater than or equal to the preset deviation When the amount is reached, make sure to send out a reminder message.

That is, the expansion pressure between adjacent cells in the multiple battery modules can be obtained, according to the expansion pressure between the adjacent cells of the target battery module in the multiple battery modules and the remaining battery modules. The pressure deviation between the expansion pressures between the adjacent cells in the battery module determines whether to issue a reminder message; when the expansion pressure between the adjacent cells of the target battery module in multiple battery modules is related to the remaining When the pressure deviation between the expansion pressures between adjacent cells in the group is greater than or equal to the preset deviation, it is determined to issue a reminder message. By comparing the expansion pressures between adjacent cells in different battery modules, abnormal battery modules can be found. When the battery module is abnormal, there is a deviation between the expansion pressure between adjacent cells in the abnormal battery module and the expansion pressure between adjacent cells in the normal battery module. When the pressure deviation between the expansion pressure between adjacent cells and the expansion pressure between adjacent cells in a normal battery module is greater than or equal to the preset deviation, a reminder message can be issued so that timely and accurate Remind the user, so that the user can intervene and deal with it in time, and reduce the accident caused by the battery damage.

In other embodiments, the step of obtaining the expansion pressure between adjacent cells in the at least one battery module may include:

Obtain the expansion pressure between adjacent cells in multiple battery modules;

The step of determining whether to issue a reminder message according to the parameter information of the expansion pressure between adjacent cells in the at least one battery module may include:

According to the amount of variation deviation between the rate of change of the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the rate of change of the expansion pressure between the adjacent cells in the remaining battery modules , to determine whether to issue a reminder message;

The amount of variation deviation between the rate of change of the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the rate of change of the expansion pressure between the adjacent cells in the remaining battery modules When it is greater than or equal to the preset variation deviation, it is determined to issue a reminder message.

During the application process, the expansion pressure between adjacent cells in the plurality of battery modules can be obtained, according to the change rate of the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the residual The amount of variation deviation between the rate of change of the expansion pressure between adjacent cells in the battery module is determined to determine whether to issue a reminder; When the variation deviation between the rate of change of the expansion pressure and the rate of change of the expansion pressure between adjacent cells in the remaining battery modules is greater than or equal to the preset variation deviation, it is determined to issue a reminder message. By comparing the rate of change of the expansion pressure between adjacent cells in different battery modules, abnormal battery modules can be found. When the battery module is abnormal, there is a deviation between the rate of change of the expansion pressure between adjacent cells in the abnormal battery module and the rate of change of the expansion pressure between adjacent cells in the normal battery module. The variation deviation between the rate of change of the expansion pressure between adjacent cells in a normal battery module and the rate of change of the expansion pressure between adjacent cells in the normal battery module is greater than or equal to the preset variation deviation When the alarm occurs, a reminder message can be issued, so that the user can be reminded in a timely and accurate manner, so that the user can intervene and deal with it in a timely manner, and reduce accidents caused by battery damage. Through the horizontal comparison between all modules in the battery, abnormal modules are identified and early warning is given.

During the entire life cycle of the battery module, the expansion force between adjacent cells in all battery modules in the battery can be monitored in real time. Assuming that there are n battery modules in the battery, when the cells in one of the battery modules have the characteristics of accelerated aging, thickening of the pole piece, and accelerated gas production rate, as shown in Figure 6, the curve a represents the abnormal mode. The expansion force change of the group, the curve b represents the expansion force change of the normal module, the early warning is made by horizontally comparing the deviation and change of the internal expansion force Fn of the abnormal module and the internal expansion force F of other normal modules, and the abnormal warning coefficient is K , the larger the K value, the more serious the fault.

The expansion rate Vn between adjacent cells in the abnormal module can be:

Vn=Fn/t

The average growth rate Vavg of the expansion force between adjacent cells in a normal module can be:

Vavg=(F1+F2+…+Fn)-Fn/(n-1)t

The abnormal alarm coefficient K can be:

k=Vn/Vavg.

When the deviation between the growth rate of the expansion force between adjacent cells in the abnormal module and the average growth rate of the expansion force between the adjacent cells in the normal module exceeds the preset value, a reminder message can be sent to remind user, so that the user can intervene and handle in time, and reduce the accident caused by battery damage. The module structure failure can be graded and alarmed through the module structure strength threshold.

In some embodiments, the step of obtaining the expansion pressure between adjacent cells in the at least one battery module may include:

Obtain the expansion pressure between adjacent cells in the same battery module at the first time and the second time, and the first time is earlier than the second time;

The step of determining whether to issue a reminder message according to the parameter information of the expansion pressure between adjacent cells in the at least one battery module may include:

When the expansion pressure between adjacent cells in one battery module at the second time is lower than the expansion pressure between adjacent cells in the same battery module at the first time, it is determined to send a reminder message.

The first moment can be a moment before the module structure of the battery module fails, and the second moment can be a moment after the module structure of the battery module fails, when the internal expansion force of the same module falls abnormally and reaches an abnormal level. , a reminder message can be issued, so that the user can be reminded in a timely and accurate manner, so that the user can intervene and process in time.

When the Fn of at least one battery module inside the battery reaches the module structural strength threshold F value, the risk of module structural failure is warned in advance, and the abnormal warning coefficient is K, where K=Fn/F, the larger the K value, the more serious the fault. . Before the module structure fails, the internal pressure of the module is before Fn, and after the module structure fails, the internal pressure of the module is Fn, and the abnormal alarm coefficient is K, where K=before Fn/after Fn, when the internal expansion force of the same module is When it falls abnormally and reaches the abnormal alarm coefficient of K, the module structure failure fault is reported. As shown in FIG. 5 , the battery module structure fails at position c.

An embodiment of the present invention provides a battery monitoring device. As shown in FIG. 1 , the monitoring device may include:

an acquisition module 10, which can be used to acquire the expansion pressure between adjacent cells in at least one battery module;

The reminder module 20 can be used to determine whether to issue reminder information according to parameter information of the expansion pressure between adjacent cells in at least one battery module; the parameter information of the expansion pressure includes at least one of the expansion pressure and the rate of change. One. In the battery monitoring device according to the embodiment of the present invention, the expansion pressure between adjacent cells in at least one battery module can be obtained through the obtaining module 10; The parameter information between the inflation pressure determines whether to issue a reminder message. By monitoring the expansion pressure between adjacent cells in the battery module, it is possible to collect the changes in the expansion force within the module during the entire life cycle for thermal runaway warning and alarm. According to the expansion pressure between adjacent cells in the battery module It can monitor the battery and give early warning, improve the timeliness and accuracy of early warning, and intervene in advance for early warning and alarm vehicles, improve the safety performance of the entire vehicle life cycle, and reduce accidents caused by battery damage.

As shown in FIG. 3 , the acquisition module 10 may include a pressure sensor 11 , and the pressure sensor 11 may be disposed between adjacent cells 1 in the battery module to monitor the expansion pressure between adjacent cells 1 in the battery module. As shown in FIG. 2 , four cells 1 can be connected in series by bus bars 3 , and pressure sensors 11 can be arranged between the cells 1 . Finally, the end plate 2 and the side plate 4 can be welded to make the module into a whole.

Optionally, the reminder module 20 may be configured to determine whether to issue reminder information according to the magnitude of the expansion pressure between adjacent cells in at least one battery module;

The reminding module 20 may be configured to issue a warning message when the magnitude of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset pressure value.

Optionally, the reminder module 20 may be configured to determine whether to issue reminder information according to the rate of change of the expansion pressure between adjacent cells in at least one battery module;

The reminding module 20 may be configured to issue a warning message when the rate of change of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset rate.

Optionally, the obtaining module 10 can be used to obtain the expansion pressure between adjacent cells in the plurality of battery modules;

The reminding module 20 can be used for the pressure between the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules Deviation, to determine whether to issue a reminder;

The reminding module 20 can be used for the pressure between the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent cells in the remaining battery modules When the deviation is greater than or equal to the preset deviation, it is determined to send out a reminder message.

Optionally, the obtaining module 10 can be used to obtain the expansion pressure between adjacent cells in the plurality of battery modules;

The reminding module 20 can be used to determine the rate of change of the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules. The amount of change deviation between the change rates to determine whether to issue a reminder;

The reminding module 20 can be used for when the rate of change of the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules is different from the expansion pressure between the adjacent cells in the remaining battery modules. When the variation deviation between the changing rates is greater than or equal to the preset variation deviation, it is determined to issue a reminder message.

Optionally, the obtaining module 10 may be configured to obtain the expansion pressure between adjacent cells in the same battery module at a first time and a second time, and the first time is earlier than the second time;

The reminder module 20 can be used when the expansion pressure between adjacent cells in one battery module at the second moment is less than the expansion pressure between adjacent cells in the same battery module at the first moment. , confirm to send the reminder message.

An embodiment of the present invention provides an electronic device, including a processor and a memory, where the memory stores a program or an instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the above-mentioned embodiments are implemented The steps of the monitoring method.

An embodiment of the present invention provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the monitoring method described in the foregoing embodiments are implemented.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (10)

1. a monitoring method of battery, is characterized in that, comprises: obtaining the expansion pressure between adjacent cells in at least one battery module; Determine whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module; The parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure. 2 . The monitoring method according to claim 1 , wherein the step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in the at least one battery module comprises: 3 . Determine whether to issue a reminder message according to the magnitude of the expansion pressure between adjacent cells in at least one battery module; When the magnitude of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset pressure value, a reminder message is issued. 3. The monitoring method according to claim 1, wherein the step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in the at least one battery module comprises: Determine whether to issue a reminder message according to the rate of change of the expansion pressure between adjacent cells in at least one battery module; When the rate of change of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset rate, a reminder message is issued. 4. The monitoring method according to claim 1, wherein the step of acquiring the expansion pressure between adjacent cells in the at least one battery module comprises: Obtain the expansion pressure between adjacent cells in multiple battery modules; The step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module includes: Whether to issue a reminder message is determined according to the pressure deviation between the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules ; When the pressure deviation between the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between adjacent cells in the remaining battery modules is greater than or equal to the preset deviation When the amount is reached, make sure to send out a reminder message. 5. The monitoring method according to claim 1, wherein the step of acquiring the expansion pressure between adjacent cells in the at least one battery module comprises: Obtain the expansion pressure between adjacent cells in multiple battery modules; The step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module includes: According to the amount of variation deviation between the rate of change of the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the rate of change of the expansion pressure between the adjacent cells in the remaining battery modules , to determine whether to issue a reminder message; The amount of variation deviation between the rate of change of the expansion pressure between adjacent cells of the target battery module in the plurality of battery modules and the rate of change of the expansion pressure between the adjacent cells in the remaining battery modules When it is greater than or equal to the preset variation deviation, it is determined to issue a reminder message. 6. monitoring method according to claim 1, is characterized in that, The step of obtaining the expansion pressure between adjacent cells in at least one battery module includes: Obtain the expansion pressure between adjacent cells in the same battery module at the first time and the second time, and the first time is earlier than the second time; The step of determining whether to issue a reminder message according to parameter information of the expansion pressure between adjacent cells in at least one battery module includes: When the expansion pressure between adjacent cells in one battery module at the second time is lower than the expansion pressure between adjacent cells in the same battery module at the first time, it is determined to send a reminder message. 7. A monitoring device for a battery, comprising: an acquisition module for acquiring the expansion pressure between adjacent cells in at least one battery module; a reminder module, configured to determine whether to issue reminder information according to parameter information of the expansion pressure between adjacent cells in at least one battery module; The parameter information of the inflation pressure includes at least one of a magnitude and a rate of change of the inflation pressure. 8. The monitoring device according to claim 7, characterized in that, The reminder module is used to determine whether to issue reminder information according to the size of the expansion pressure between adjacent cells in at least one battery module; The reminder module is used to issue reminder information when the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset pressure value; or The reminder module is configured to determine whether to issue reminder information according to the rate of change of the expansion pressure between adjacent cells in the at least one battery module; The reminder module is used to issue reminder information when the rate of change of the expansion pressure between adjacent cells in at least one battery module is greater than or equal to a preset rate; or the obtaining module is used to obtain the expansion pressure between adjacent cells in the plurality of battery modules; The reminder module is used for the pressure deviation between the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent cells in the remaining battery modules amount to determine whether to issue a reminder; The reminder module is used for the pressure deviation between the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the expansion pressure between the adjacent cells in the remaining battery modules When the amount is greater than or equal to the preset deviation amount, it is determined to issue a reminder message; or the obtaining module is used to obtain the expansion pressure between adjacent cells in the plurality of battery modules; The reminder module is used for the change rate of the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the change of the expansion pressure between the adjacent cells in the remaining battery modules The change deviation between the rates to determine whether to issue a reminder message; The reminder module is used when the rate of change of the expansion pressure between the adjacent cells of the target battery module in the plurality of battery modules and the change of the expansion pressure between the adjacent cells in the remaining battery modules When the variation deviation between the rates is greater than or equal to the preset variation deviation, a reminder message is determined to be issued; or the obtaining module is used to obtain the expansion pressure between adjacent cells in the same battery module at a first time and a second time, and the first time is earlier than the second time; The reminder module is used for, when the expansion pressure between adjacent cells in one battery module at the second moment is less than the expansion pressure between adjacent cells in the same battery module at the first moment, Make sure to send a reminder message. 9. An electronic device, characterized in that it comprises a processor and a memory, wherein the memory stores a program or an instruction that can be run on the processor, and when the program or instruction is executed by the processor, claim 1 is implemented -6 the steps of any one of the methods. 10. A readable storage medium, wherein a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method according to any one of claims 1-6 are implemented .

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