Early warning method and system for sealing failure of battery stack, electronic equipment and detection table

Abstract

The invention relates to a battery stack sealing failure early warning method and system, electronic equipment and a detection bench, and the method comprises the steps: obtaining the actual stack packaging force monitored by a pressure monitoring device when a battery stack is in a target state, and obtaining a stack packaging force threshold value corresponding to the target state, the galvanic pile packaging force threshold and a galvanic pile packaging force target value used for determining leakage of the battery galvanic pile are not equal, and the target state comprises an assembly state, an actual operation working condition state and a shutdown working condition state; according to the size relation between the actual stack packaging force and the stack packaging force threshold value, whether an early warning signal is sent out or not is determined, early warning of failure caused by poor sealing performance due to uneven stress of the battery stack can be achieved, and compared with the scheme that remedial measures are executed after sealing failure occurs in the related technology, the method has the advantages that the reliability is high, and the reliability is high. According to the scheme, the situation of sealing failure can be successfully avoided.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of fluid battery, in particular, to a battery stack seal failure early warning method, system, electronic device and detection platform. BACKGROUND

[0002] The fluid battery is a new type of storage battery. The fluid battery is composed of a stack unit, a fluid medium, a fluid storage and supply unit, a management and control unit and the like, has the characteristics of high capacity, wide application field and long cycle service life, and the battery stack of the fluid battery is the core equipment, and the sealing performance directly affects the safety of the system.

[0003] When the sealing performance of the stack is insufficient to block the fluid from being sealed, the system safety problem and performance decline will be caused, and even the normal work cannot be performed. SUMMARY

[0004] The purpose of the present disclosure is to provide a battery stack seal failure early warning method, medium, electronic device and system.

[0005] In order to achieve the above purpose, in a first aspect, the present disclosure provides a battery stack seal failure early warning method, the inner side of the stack end plate is provided with a pressure monitoring device, and the early warning method comprises: Obtaining the actual stack packaging force monitored by the pressure monitoring device in the target state of the battery stack, and obtaining the stack packaging force threshold value corresponding to the target state, the stack packaging force threshold value and the stack packaging force target value for determining the leakage of the battery stack are not equal, and the target state includes an assembly state, an actual running condition state and a shutdown condition state; According to the size relationship between the actual stack packaging force and the stack packaging force threshold value, it is determined whether to send a warning signal.

[0006] Optionally, the method further comprises: In the assembly state, obtaining the initial packaging force inside the battery stack, obtaining the stack internal pressure change amount, the packaging force change amount after the initial pressure is reached, and the leakage condition of the battery stack after the medium is injected for a preset time length; According to the initial pressure, the initial packaging force, the pressure change amount, the packaging force change and the leakage condition, a first stack mechanical distribution is determined, and the first stack mechanical distribution is used to represent the stack packaging force target value of the assembly state which occurs seal failure; According to the first stack mechanical distribution, a second stack mechanical distribution is determined, and the second stack mechanical distribution is used to represent the stack packaging force threshold value for determining whether to send the warning signal in the assembly state.

[0007] Optionally, the method further comprises: acquiring first working condition data in an actual working condition state of the battery stack; correcting the first stack mechanical distribution according to the first working condition data to obtain a third stack mechanical distribution, the third stack mechanical distribution being used to represent an electric stack packaging force target value in the actual working condition state in which sealing failure occurs; determining a fourth stack mechanical distribution according to the third stack mechanical distribution, the fourth stack mechanical distribution being used to represent an electric stack packaging force threshold value in the actual working condition state for determining whether to issue the early warning signal.

[0008] Optionally, the method further comprises: acquiring second working condition data in a shutdown working condition state of the battery stack; correcting the first stack mechanical distribution according to the second working condition data to obtain a fifth stack mechanical distribution, the fifth stack mechanical distribution being used to represent an electric stack packaging force target value in the shutdown working condition state in which sealing failure occurs; determining a sixth stack mechanical distribution according to the fifth stack mechanical distribution, the sixth stack mechanical distribution being used to represent an electric stack packaging force threshold value in the shutdown working condition state for determining whether to issue the early warning signal.

[0009] Optionally, the method further comprises: adjusting a target parameter injected into the medium to obtain the first stack mechanical distribution corresponding to different initial pressures, the initial pressure corresponding to only one of the actual working condition states, the target parameter including flow or pressure.

[0010] Optionally, the first stack mechanical distribution includes a plurality of first stack mechanical distributions, and the plurality of first stack mechanical distributions correspond to different battery stacks.

[0011] Optionally, the electric stack packaging force threshold value includes an upper limit threshold value of the electric stack packaging force, and the determination of whether to issue the early warning signal according to the size relationship between the actual electric stack packaging force and the electric stack packaging force threshold value includes: determining to issue the early warning signal in the case that the actual electric stack packaging force is greater than the upper limit threshold value of the electric stack packaging force.

[0012] Optionally, the electric stack packaging force threshold value includes a lower limit threshold value of the electric stack packaging force, and the determination of whether to issue the early warning signal according to the size relationship between the actual electric stack packaging force and the electric stack packaging force threshold value includes: determining to issue the early warning signal in the case that the actual electric stack packaging force is less than the lower limit threshold value of the electric stack packaging force.

[0013] Optionally, the method further comprises: After the pre-warning signal is sent, the packaging force for the battery stack is adjusted.

[0014] In a second aspect, the disclosure provides a battery stack, comprising an end plate, and a pressure monitoring device arranged inside the end plate.

[0015] In a third aspect, the disclosure provides a pre-warning system for battery stack sealing failure, comprising: a battery stack, comprising an end plate, and a pressure monitoring device arranged inside the end plate, the pressure monitoring device being configured to monitor an actual stack packaging force of the battery stack in a target state, the target state comprising an assembly state, an actual operating condition state, and a shutdown condition state; an analysis module configured to execute the pre-warning method of any one of the first aspect.

[0016] In a fourth aspect, the disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, the computer program being configured to implement the steps of the method of any one of the first aspect when executed by a processor.

[0017] In a fifth aspect, the disclosure provides an electronic device, comprising: a memory having a computer program stored thereon; a processor configured to execute the computer program in the memory to implement the steps of the method of any one of the first aspect.

[0018] In a sixth aspect, the disclosure provides a computer program product, comprising a computer program configured to implement the steps of the method of any one of the first aspect when executed by a processor.

[0019] In a seventh aspect, the disclosure provides a test bench, comprising at least the electronic device of the fifth aspect.

[0020] According to the above technical solution, since the stack packaging force threshold and the stack packaging force for determining the leakage of the battery stack are not equal, by comparing the size relationship between the actual stack packaging force of the battery stack in the target state monitored by the pressure monitoring device and the stack packaging force threshold corresponding to the target state, the early pre-warning of the leakage of the battery stack due to poor sealing caused by uneven stress can be realized. Compared with the scheme of performing remedial measures after leakage occurs in the related art, the present scheme can successfully avoid the leakage.

[0021] Other features and advantages of the disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, illustrate embodiments of the present disclosure and are included to provide a further understanding of the present disclosure, and together with the specific embodiments described below, serve to explain the present disclosure but do not limit the present disclosure. In the drawings: Figure 1 is a flowchart of a battery stack seal failure early warning method according to an exemplary embodiment of the present disclosure.

[0023] Figure 2 is a schematic diagram of a pressure monitoring device, an end plate and a liquid inlet plate according to an exemplary embodiment of the present disclosure.

[0024] Figure 3 is another schematic diagram of a pressure monitoring device, an end plate and a liquid inlet plate according to an exemplary embodiment of the present disclosure.

[0025] Figure 4 is another schematic diagram of a pressure monitoring device, an end plate and a liquid inlet plate according to an exemplary embodiment of the present disclosure.

[0026] Figure 5 is a flowchart of determining a second stack mechanical distribution according to an exemplary embodiment of the present disclosure.

[0027] Figure 6 is a flowchart of determining a fourth stack mechanical distribution according to an exemplary embodiment of the present disclosure.

[0028] Figure 7 is a flowchart of determining a sixth stack mechanical distribution according to an exemplary embodiment of the present disclosure.

[0029] Figure 8 is another flowchart of a battery stack seal failure early warning method according to an exemplary embodiment of the present disclosure.

[0030] Figure 9 is a block diagram of a battery stack leakage early warning system according to an exemplary embodiment of the present disclosure.

[0031] Figure 10 is a structural schematic diagram of an electronic device according to an exemplary embodiment of the present disclosure.

[0032] Explanation of reference signs 1 - first liquid inlet plate, 2 - first pressure monitoring device, 3 - end plate, 4 - liquid inlet hole, 5 - liquid outlet hole, bolt hole - 6, 7 - second liquid inlet plate, 8 - second pressure monitoring device, 9 - third pressure monitoring device. DETAILED DESCRIPTION

[0033] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0034] It should be noted that all actions of obtaining signals, information or data in the present disclosure are carried out in compliance with the corresponding data protection regulations and policies of the country where the device is located, and with the authorization given by the owner of the corresponding device.

[0035] The battery stack is usually made by pressing the end plate, the liquid inlet plate, the current collector and a plurality of single cells through lamination. The tightening can be performed by bolts and springs, etc. During the tightening process, the surface of the end plate will be subjected to different degrees of compression force, causing the end plate to deform unevenly. In addition, under the actual operating conditions of the battery stack, there are phenomena such as cold and hot alternation, thermal expansion and cold contraction, so that the compression force received by the battery stack is not enough to ensure the sealing of the stack, i.e. the sealing fails, thereby causing leakage and other problems.

[0036] Therefore, the present embodiment of the present disclosure provides a battery stack sealing failure early warning method and system, electronic equipment and a detection platform. Since the battery stack packaging force threshold and the battery stack packaging force target value for determining the leakage of the battery stack are not equal, by comparing the size relationship between the actual battery stack packaging force of the battery stack in the target state monitored by the pressure monitoring device and the battery stack packaging force threshold corresponding to the target state, the early warning of the leakage of the battery stack caused by uneven stress leading to poor sealing and resulting in sealing failure can be realized. Compared with the scheme of performing remedial measures after leakage in the related art, the present scheme can successfully avoid the leakage.

[0037] The present embodiment of the present disclosure is further explained and described below in conjunction with the accompanying drawings.

[0038] Figure 1 is a flowchart of a battery stack sealing failure early warning method according to an exemplary embodiment of the present disclosure. Referring to Figure 1 The battery stack sealing failure early warning method can include the following steps: In step 110, the actual battery stack packaging force monitored by the pressure monitoring device in the target state of the battery stack is obtained, and the battery stack packaging force threshold corresponding to the target state is obtained. The battery stack packaging force threshold and the battery stack packaging force target value for determining the leakage of the battery stack are not equal. The target state includes the assembly state, the actual operating condition state and the shutdown condition state.

[0039] It should be understood that the packaging force in the present embodiment refers to the pressure acting on the end plate. The packaging force herein, such as the actual battery stack packaging force and the battery stack packaging force threshold, is used to describe the technical features of the packaging force.

[0040] The pressure monitoring device can be a plate-shaped device, which can be rectangular, circular, U-shaped, ring-shaped, triangular, rhombic, or elliptical. In addition, the device for monitoring the actual stack packaging force included in the pressure monitoring device can be a thin film sensor and a membrane electrode, and the like. The device can include multiple devices, which are attached to the inner side of the two end plates (the outer side of the liquid inlet plate). The size of the pressure monitoring device can be less than or equal to the size of the end plate. The device can be distributed in a scattered dot, strip, circular, ring, or U-shaped manner on the plane of the end plate or the liquid inlet plate, and can be distributed around the screw.

[0041] Further, the pressure monitoring device can include a data acquisition module and a data processing module. The data acquisition module can be as described above. The data processing module converts the pressure signal detected by the device into an electrical signal, and the electrical signal represents the actual stack packaging force.

[0042] Further, the pressure monitoring device can not carry a bolt hole, for example Figure 2 The schematic diagram of the pressure monitoring device, the end plate, and the liquid inlet plate is shown. Referring to Figure 2 , the first pressure monitoring device 2 is located between the inner side of the end plate 3 and the first liquid inlet plate 1. The liquid inlet hole 4 is a channel for conveying reaction gas (such as hydrogen and oxygen) and cooling liquid to the battery stack. The liquid outlet hole 5 is a channel for discharging reaction gas and cooling liquid. The bolt hole 6 is used to fasten the battery stack.

[0043] Further, the pressure monitoring device can carry a bolt hole, and at the same time, the liquid inlet plate can also carry a bolt hole. When assembled, the screw can pass through the liquid inlet plate and the pressure monitoring device, for example Figure 3 The schematic diagram of the pressure monitoring device, the end plate, and the liquid inlet plate is shown. The second pressure monitoring device 8 carrying a bolt hole is located between the inner side of the end plate 3 and the second liquid inlet plate 7 carrying a bolt hole.

[0044] Further, the pressure monitoring device can be in a U-shaped shape carrying a bolt hole, and at the same time, the liquid inlet plate can also carry a bolt hole. When assembled, the screw can pass through the liquid inlet plate and the pressure monitoring device, for example Figure 4 The schematic diagram of the pressure monitoring device, the end plate, and the liquid inlet plate is shown. The third pressure monitoring device 9 carrying a bolt hole and in a U-shaped shape is located between the inner side of the end plate 3 and the second liquid inlet plate 7.

[0045] The actual operating condition state refers to a specified voltage, a specified current, a specified power, a specified temperature, and the like.

[0046] The shutdown condition state specifically refers to a state in which no medium is input into the battery stack in the actual operating condition state.

[0047] It should be understood that the stack packaging force target value is a packaging force value at which the battery stack leaks, and the stack packaging force threshold value is a packaging force value determined based on the stack packaging force target value for early warning of a possible leak of the battery stack. Generally, the stack packaging force threshold value is set to be less than or greater than the stack packaging force target value according to the actual leakage situation.

[0048] For example, when a leak occurs when the actual packaging force is greater than the stack packaging force target value and a value greater than the stack packaging force target value, the stack packaging force threshold value needs to be set to be less than the stack packaging force target value. This case can be considered as a result of excessive packaging force causing mechanical damage to the stack, thereby causing sealing failure and further causing a leak.

[0049] For another example, when a leak occurs when the actual packaging force is less than the stack packaging force target value and a value less than the stack packaging force target value, the stack packaging force threshold value needs to be set to be greater than the stack packaging force target value. This case can be considered as a result of insufficient packaging force causing insufficient sealing of the stack, thereby causing sealing failure and further causing a leak.

[0050] Step 120, determining whether to issue a warning signal according to the size relationship between the actual stack packaging force and the stack packaging force threshold value.

[0051] From the above, it can be seen that the stack packaging force threshold value needs to be less than or greater than the stack packaging force target value according to the actual leakage situation. Therefore, the above step 120 can be implemented by the following two cases.

[0052] The first implementation case is that the warning signal is determined to be issued when the actual stack packaging force is greater than the upper limit of the stack packaging force threshold value. It should be understood that the upper limit of the stack packaging force threshold value in this embodiment is a value set to be less than the stack packaging force target value. This case can be considered as a result of excessive packaging force causing mechanical damage to the stack, thereby causing sealing failure and further causing a leak.

[0053] The second implementation case is that the warning signal is determined to be issued when the actual stack packaging force is less than the lower limit of the stack packaging force threshold value. It should be understood that the lower limit of the stack packaging force threshold value in this embodiment is a value set to be greater than the stack packaging force target value. This case can be considered as a result of insufficient packaging force causing insufficient sealing of the stack, thereby causing sealing failure and further causing a leak.

[0054] By the technical scheme, since the battery stack packaging force threshold value and the battery stack packaging force target value for determining the leakage of the battery stack are not equal, by comparing the size relationship between the actual battery stack packaging force of the battery stack in the target state monitored by the pressure monitoring device and the battery stack packaging force threshold value of the corresponding target state, early warning of the leakage of the battery stack due to poor sealing caused by uneven stress and resulting in sealing failure can be realized. Compared with the scheme of performing remedial measures after leakage in the related art, the present scheme can successfully avoid the leakage.

[0055] Figure 5 is a flowchart for determining a second battery stack mechanical distribution according to an example embodiment of the present disclosure, referring to Figure 5 , comprising the following steps: Step 510, in the assembled state, obtaining the initial packaging force inside the battery stack, obtaining the pressure change amount inside the battery stack after reaching the initial pressure, the packaging force change amount and the leakage condition of the battery stack after the preset time length of the injected medium after injecting the medium; Step 520, determining a first battery stack mechanical distribution according to the initial pressure, the initial packaging force, the pressure change amount, the packaging force change and the leakage condition, the first battery stack mechanical distribution being used to represent the battery stack packaging force target value in the assembled state that causes sealing failure; Step 530, determining a second battery stack mechanical distribution according to the first battery stack mechanical distribution, the second battery stack mechanical distribution being used to represent the battery stack packaging force threshold value in the assembled state for determining whether to issue a warning signal.

[0056] It should be understood that in the case where the pressure change amount is higher than the preset value, it indicates that the sealing is good, and thus it can be determined that no leakage occurs, and in the case where the pressure change amount is lower than or equal to the preset value, it indicates that the sealing is poor, and thus it can be determined that leakage occurs.

[0057] It should be understood that the leakage condition can be obtained according to manual observation.

[0058] It should be understood that the preset time length can be set according to actual conditions, which is not limited in the present embodiment.

[0059] It should be understood that the medium in the present embodiment can be a liquid or a gas, which is not limited in the present embodiment.

[0060] It should be understood that after the injected medium reaches the initial pressure and the preset time length of the injected medium, in the ideal case, i.e. in the case where no leakage occurs, the pressure inside the battery stack always maintains or does not decrease much, and if the pressure inside the battery stack decreases too much, it can be determined that the battery stack leaks.

[0061] It should be understood that the packaging force is determined by adjusting the torsion of the screw rod fastening the two side end plates and the force applied to the end plates by the press, and the screw rod is multiple, and the screw holes of the end plates are also multiple, and a device for monitoring the packaging force can be arranged at each screw hole, and each screw hole corresponds to a packaging force change, therefore, the first stack mechanical distribution further describes the stack packaging force target value at each monitoring position.

[0062] Further, the second stack mechanical distribution determined according to the first stack mechanical distribution also reflects the stack packaging force threshold at each monitoring position.

[0063] From the above, it can be seen that the actual stack packaging force monitored by the pressure monitoring device also describes the distribution of the actual stack packaging force at each monitoring position.

[0064] In the above manner, the second stack mechanical distribution for characterizing the stack packaging force threshold in the assembled state is obtained by simulation analysis, so that according to the second stack mechanical distribution, a reasonable control packaging force used for packaging the battery stack can be determined when the battery stack is assembled, so as to avoid the occurrence of sealing failure.

[0065] In some embodiments, the stack packaging force threshold corresponding to the actual operating condition state can be obtained according to the corrected first stack mechanical distribution. Figure 6 is a flow chart for determining a fourth stack mechanical distribution according to an example embodiment of the present disclosure, referring to Figure 6 , comprising the following steps: Step 610, obtaining first condition data in an actual operating condition state of a battery stack; Step 620, correcting the first stack mechanical distribution according to the first condition data, to obtain a third stack mechanical distribution, the third stack mechanical distribution being used for characterizing a stack packaging force target value in the actual operating condition state in which sealing failure occurs; Step 630, determining a fourth stack mechanical distribution according to the third stack mechanical distribution, the fourth stack mechanical distribution being used for characterizing a stack packaging force threshold in the actual operating condition state for determining whether to issue a warning signal.

[0066] Among them, the first condition data in the embodiment is obtained according to experiments, and the first condition data is, for example, the pressure change amount, the packaging force change amount and the leakage condition inside the battery stack.

[0067] It should be understood that, similar to the first stack mechanical distribution, the third stack mechanical distribution is used for characterizing the stack packaging force in which the battery stack leaks in the actual operating condition state, that is, the stack packaging force target value.

[0068] Similar to the first stack mechanical distribution, the third stack mechanical distribution further describes the stack packaging force target value at each monitoring position.

[0069] Further, the fourth stack mechanical distribution determined according to the third stack mechanical distribution also reflects the stack packaging force threshold value at each monitoring position.

[0070] In the above manner, the first stack mechanical distribution is corrected according to the working condition data in the actual running working condition state, so that the critical value of the packaging force when leakage occurs in the actual running working condition state can be obtained, and thus the risks of corrosion and leakage of the stack in the actual running process can be avoided.

[0071] Figure 7 is a flowchart for determining a sixth stack mechanical distribution according to an example embodiment of the present disclosure. Referring to Figure 7 , the following steps are included: Step 710, obtaining second working condition data in a shutdown working condition state of the battery stack; Step 720, correcting the first stack mechanical distribution according to the second working condition data to obtain a fifth stack mechanical distribution, the fifth stack mechanical distribution being used to represent a stack packaging force target value when sealing failure occurs in the shutdown working condition state; Step 730, determining a sixth stack mechanical distribution according to the fifth stack mechanical distribution, the sixth stack mechanical distribution being used to represent a stack packaging force threshold value for determining whether to send a warning signal in the shutdown working condition state.

[0072] Similar to the first working condition data, the second working condition data in the present embodiment is obtained according to experiments, and the second working condition data is, for example, the internal pressure change amount of the battery stack, the packaging force change amount, and the leakage condition.

[0073] It should be understood that, similar to the first stack mechanical distribution, the fifth stack mechanical distribution is used to represent the stack packaging force when the battery stack leaks in the shutdown working condition state, i.e., the stack packaging force target value.

[0074] Similar to the first stack mechanical distribution, the fifth stack mechanical distribution further describes the stack packaging force target value at each monitoring position.

[0075] Further, the sixth stack mechanical distribution determined according to the fifth stack mechanical distribution also reflects the stack packaging force threshold value at each monitoring position.

[0076] In the above manner, the first stack mechanical distribution is corrected according to the working condition data in the shutdown working condition state, so that the critical value of the packaging force when leakage occurs in the shutdown working condition state can be obtained, and thus the risks of corrosion and leakage of the stack in the shutdown working condition state can be avoided.

[0077] In some embodiments, different initial pressures can be adjusted for the same battery stack, and different initial pressures correspond to different first stack mechanical distributions, and different initial pressures simulate different actual operating conditions, that is, one initial pressure corresponds to one actual operating condition. Therefore, the above early warning method can further include the following steps: adjusting the target parameters of the injected medium to obtain the first stack mechanical distribution corresponding to the different initial pressures.

[0078] Wherein, the target parameter can be flow or pressure.

[0079] It should be understood that adjusting the flow and pressure of the injected medium can change the size of the initial pressure. It should be noted that the battery stack is running, which involves temperature changes, and temperature changes cause materials to deform and other changes, thus affecting the sealing, and thus the internal voltage of the battery stack will also change, so different initial pressures can simulate different actual operating conditions.

[0080] On this basis, when determining the stack packaging force threshold corresponding to the actual operating condition, the first stack mechanical distribution corresponding to the initial pressure corresponding to the actual operating condition can be selected for correction when the first stack mechanical distribution is corrected, so as to obtain the final stack mechanical distribution.

[0081] In some embodiments, the first stack mechanical distribution includes multiple, and the multiple first stack mechanical distributions correspond to different battery stacks, and the different battery stacks can be different in size. In this way, when facing different sizes of battery stack leakage early warning, the stack mechanical distribution determined according to the corresponding first stack mechanical distribution can be selected to realize Figure 1 The scheme shown is targeted to realize different battery stack leakage early warning, and improves the accuracy of early warning.

[0082] Figure 8 Another flowchart of a battery stack leakage early warning method according to an exemplary embodiment of the present disclosure is shown, referring to Figure 8 , including the following steps: Step 810, in the assembled state, obtain the initial packaging force inside the battery stack, and obtain the pressure change amount inside the battery stack after reaching the initial pressure, the packaging force change amount, and the leakage condition of the battery stack after injecting the medium for a predetermined time length. Step 820, according to the initial pressure, the initial packaging force, the pressure change amount, the packaging force change, and the leakage condition, determine a first stack mechanical distribution, which is used to represent the stack packaging force target value of the sealing failure in the assembled state. Step 830, repeat verification to obtain different first stack mechanical distributions; Step 840, determining a second stack mechanics distribution according to the first stack mechanics distribution, the second stack mechanics distribution being used to characterize a stack packaging force threshold in the assembled state for determining whether to issue the early warning signal; Step 850, obtaining first working condition data in an actual working condition state of the battery stack; Step 860, correcting the first stack mechanics distribution according to the first working condition data to obtain a third stack mechanics distribution, the third stack mechanics distribution being used to characterize a stack packaging force target value in the actual working condition state at which sealing failure occurs; Step 870, determining a fourth stack mechanics distribution according to the third stack mechanics distribution, the fourth stack mechanics distribution being used to characterize a stack packaging force threshold in the actual working condition state for determining whether to issue the early warning signal; Step 880, obtaining second working condition data in a shutdown working condition state of the battery stack; Step 890, correcting the first stack mechanics distribution according to the second working condition data to obtain a fifth stack mechanics distribution, the fifth stack mechanics distribution being used to characterize a stack packaging force target value in the shutdown working condition state at which sealing failure occurs; Step 910, determining a sixth stack mechanics distribution according to the fifth stack mechanics distribution, the sixth stack mechanics distribution being used to characterize a stack packaging force threshold in the shutdown working condition state for determining whether to issue the early warning signal; Step 920, determining to issue an early warning signal and adjusting the packaging force for the battery stack after issuing the early warning signal according to the size relationship between the actual stack packaging force and the stack packaging force threshold in different states.

[0083] The embodiments of steps 810, 820, 840, 850, 860, 870, 880, 890 and 910 can refer to the above embodiments, which will not be repeated here.

[0084] In step 830, the repeated verification is to improve the accuracy of the first stack mechanics distribution. Further, the first stack mechanics distribution used in step 840 is the first stack mechanics distribution with the largest proportion among the multiple verified first stack mechanics distributions.

[0085] In step 920, the packaging force for the battery stack is adjusted after the early warning signal is issued, so that the risks of corrosion and leakage can be avoided. The different states in this step can be any one of the assembled state, the actual working condition state and the shutdown working condition state.

[0086] Based on the same concept, the disclosure provides a battery stack, which comprises an end plate and a pressure monitoring device arranged on the inner side of the end plate.

[0087] Based on the same concept, the present disclosure provides a battery stack sealing failure early warning system, referring to Figure 9 , the early warning system comprises: a battery stack comprising an end plate, and a pressure monitoring device arranged inside the end plate, the pressure monitoring device being used to monitor actual stack packaging force of the battery stack in a target state, the target state comprising an assembly state, an actual operating condition state and a shutdown condition state; an analysis module comprising an analysis unit, the analysis unit being used to obtain actual stack packaging force of the battery stack in a target state monitored by the pressure monitoring device, and obtain stack packaging force threshold value corresponding to the target state, the stack packaging force threshold value and the stack packaging force target value for determining whether the battery stack leaks are not equal, the target state comprising an assembly state, an actual operating condition state and a shutdown condition state; according to the size relationship between the actual stack packaging force and the stack packaging force threshold value, it is determined whether to issue a warning signal.

[0088] Optionally, the analysis unit is further used to: in the assembly state, obtain the initial packaging force inside the battery stack, obtain the stack internal pressure change amount, the packaging force change amount after the initial pressure is reached, and the leakage condition of the battery stack after the medium is injected for a preset time length; determine a first stack mechanical distribution according to the initial pressure, the initial packaging force, the pressure change amount, the packaging force change and the leakage condition, the first stack mechanical distribution being used to represent the stack packaging force target value for sealing failure in the assembly state; determine a second stack mechanical distribution according to the first stack mechanical distribution, the second stack mechanical distribution being used to represent the stack packaging force threshold value for determining whether to issue the warning signal in the assembly state.

[0089] Optionally, the analysis unit is further used to: obtain first operating condition data in the actual operating condition state of the battery stack; correct the first stack mechanical distribution according to the first operating condition data to obtain a third stack mechanical distribution, the third stack mechanical distribution being used to represent the stack packaging force target value for sealing failure in the actual operating condition state; determine a fourth stack mechanical distribution according to the third stack mechanical distribution, the fourth stack mechanical distribution being used to represent the stack packaging force threshold value for determining whether to issue the warning signal in the actual operating condition state.

[0090] Optionally, the analysis unit is further configured to: acquire second working condition data in a shutdown working condition state of the battery stack; correct the first stack mechanical distribution according to the second working condition data to obtain a fifth stack mechanical distribution, the fifth stack mechanical distribution being used to represent a stack packaging force target value in the shutdown working condition state in which the sealing failure occurs; determine a sixth stack mechanical distribution according to the fifth stack mechanical distribution, the sixth stack mechanical distribution being used to represent a stack packaging force threshold value in the shutdown working condition state for determining whether to send the early warning signal.

[0091] Optionally, the analysis unit is further configured to: adjust a target parameter injected into the medium to obtain the first stack mechanical distribution corresponding to different initial pressures, the initial pressure corresponding to only one actual working condition state, and the target parameter including flow or pressure.

[0092] Optionally, the first stack mechanical distribution includes a plurality of first stack mechanical distributions corresponding to different battery stacks.

[0093] Optionally, the stack packaging force threshold value includes an upper limit threshold value of the stack packaging force, and the analysis unit is further configured to: determine to send an early warning signal in a case where the actual stack packaging force is greater than the upper limit threshold value of the stack packaging force.

[0094] Optionally, the stack packaging force threshold value includes a lower limit threshold value of the stack packaging force, and the analysis unit is further configured to: determine to send an early warning signal in a case where the actual stack packaging force is less than the lower limit threshold value of the stack packaging force.

[0095] Optionally, the analysis module further includes an early warning control unit configured to adjust the packaging force for the battery stack upon receiving the early warning signal.

[0096] In the embodiments of the early warning system, the above-mentioned related embodiments can be referred to for implementation, and details are not described herein.

[0097] Based on the same concept, the embodiments of the present disclosure provide a non-transitory computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the steps of the early warning method.

[0098] Based on the same concept, the embodiments of the present disclosure provide a computer program product, including a computer program, characterized by the computer program being executed by a processor to implement the steps of the early warning method.

[0099] Based on the same idea, the embodiments of the present disclosure provide a test bench, characterized in at least comprising the following electronic device. The test bench Based on the same idea, the embodiments of the present disclosure provide an electronic device, comprising: a memory having stored thereon a computer program; a processor configured to execute the computer program in the memory to implement the steps of the early warning method.

[0100] Figure 10 is a block diagram of an electronic device 1000 according to an exemplary embodiment. As shown, the electronic device 1000 can include a processor 1001 and a memory 1002. The electronic device 1000 can also include one or more of a multimedia component 1003, an input / output (I / O) interface 1004, and a communication component 1005. Figure 10

[0101] ​The processor 1001 is configured to control overall operations of the electronic device 1000 to complete all or part of the steps of the early warning method described above. The memory 1002 is configured to store various types of data to support operations of the electronic device 1000, which can include, for example, instructions for operating any application or method on the electronic device 1000, and application-related data, such as contact data, sent and received messages, pictures, audio, video, and the like. The memory 1002 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The multimedia component 1003 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is configured to output and / or input audio signals. For example, the audio component can include a microphone configured to receive external audio signals. The received audio signals can be further stored in the memory 1002 or transmitted through the communication component 1005. The audio component also includes at least one speaker configured to output audio signals. The I / O interface 1004 provides an interface between the processor 1001 and other interface modules, which can be a keyboard, a mouse, a button, and the like. The buttons can be virtual buttons or physical buttons. The communication component 1005 is configured to perform wired or wireless communication between the electronic device 1000 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, and the like, or a combination of one or more of them, is not limited herein. Therefore, the corresponding communication component 1005 can include a Wi-Fi module, a Bluetooth module, an NFC module, and the like.

[0102] In an exemplary embodiment, the electronic device 1000 can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for performing the above-mentioned early warning method.

[0103] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implements the steps of the above-mentioned early warning method. For example, the computer-readable storage medium can be the above-mentioned memory 1002 including program instructions, and the above-mentioned program instructions can be executed by the processor 1001 of the electronic device 1000 to complete the above-mentioned early warning method.

[0104] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0105] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0106] In addition, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed in the present disclosure.

Claims

1. A method for early warning of a battery stack seal failure, characterized in that, The inner side of the stack end plate is provided with a pressure monitoring device, and the early warning method comprises: Obtaining the actual stack packaging force monitored by the pressure monitoring device in the target state of the battery stack, and obtaining the stack packaging force threshold corresponding to the target state, the stack packaging force threshold and the stack packaging force target value for determining whether the battery stack leaks are not equal, and the target state includes an assembly state, an actual operation condition state and a shutdown condition state; According to the size relationship between the actual stack packaging force and the stack packaging force threshold, it is determined whether to issue a warning signal.

2. The method of claim 1, wherein, The method further comprises: In the assembly state, the initial packaging force inside the battery stack is obtained, the pressure change amount inside the battery stack after reaching the initial pressure, the packaging force change amount and the leakage condition of the battery stack after injecting the medium for a preset time are obtained after injecting the medium; According to the initial pressure, the initial packaging force, the pressure change amount, the packaging force change and the leakage condition, a first stack mechanical distribution is determined, which is used to represent the stack packaging force target value of the assembly state that occurs sealing failure; According to the first stack mechanical distribution, a second stack mechanical distribution is determined, which is used to represent the stack packaging force threshold for determining whether to issue the warning signal in the assembly state.

3. The method of claim 2, wherein, The method further comprises: Obtaining first working condition data in the actual operation condition state of the battery stack; According to the first working condition data, the first stack mechanical distribution is corrected to obtain a third stack mechanical distribution, which is used to represent the stack packaging force target value of the actual operation condition state that occurs sealing failure; According to the third stack mechanical distribution, a fourth stack mechanical distribution is determined, which is used to represent the stack packaging force threshold for determining whether to issue the warning signal in the actual operation condition state.

4. The method of claim 2, wherein, The method further comprises: Obtaining second working condition data in the shutdown condition state of the battery stack; According to the second working condition data, the first stack mechanical distribution is corrected to obtain a fifth stack mechanical distribution, which is used to represent the stack packaging force target value of the shutdown condition state that occurs sealing failure; According to the fifth stack mechanical distribution, a sixth stack mechanical distribution is determined, which is used to represent the stack packaging force threshold for determining whether to issue the warning signal in the shutdown condition state.

5. The method of claim 2, wherein, The method further comprises: Adjusting the target parameters of injecting the medium to obtain the first stack mechanical distribution corresponding to different initial pressures, the initial pressure corresponding to only one actual operation condition state, and the target parameters including flow or pressure.

6. The method of claim 2, wherein, The first stack mechanical distribution includes a plurality of first stack mechanical distributions corresponding to different battery stacks.

7. The method of claim 1, wherein, The stack packaging force threshold includes an upper limit threshold of the stack packaging force, and the determination of whether to issue a warning signal according to the size relationship between the actual stack packaging force and the stack packaging force threshold comprises: In a case where the actual stack packaging force is greater than the upper stack packaging force threshold, it is determined to send a pre-warning signal.

8. The method of claim 1, wherein, The stack packaging force threshold includes a lower stack packaging force threshold, and the determination of whether to send a pre-warning signal according to the size relationship between the actual stack packaging force and the stack packaging force threshold includes: In a case where the actual stack packaging force is less than the lower stack packaging force threshold, it is determined to send a pre-warning signal.

9. The method of any one of claims 1-8, wherein, The method further includes: After the pre-warning signal is sent, the packaging force for the battery stack is adjusted.

10. A battery stack, characterized by The battery stack includes an end plate and a pressure monitoring device arranged inside the end plate.

11. A battery stack seal failure early warning system characterized by, It includes: A battery stack includes an end plate and a pressure monitoring device arranged inside the end plate, and the pressure monitoring device is used to monitor the actual stack packaging force of the battery stack in a target state, and the target state includes an assembled state, an actual operating condition state and a shutdown condition state. The analysis module is used to execute the pre-warning method of any one of claims 1-9.

12. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method of any one of claims 1-9.

13. An electronic device, comprising: It includes: A memory having a computer program stored thereon; A processor for executing the computer program in the memory to implement the steps of the method of any one of claims 1-9.

14. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method of any one of claims 1-9.

15. A test station characterized by, At least the electronic device of claim 13.

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