Battery pre-discharge protection monitoring method and device, computer equipment and storage medium

Abstract

The invention provides a battery pre-discharge protection monitoring method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a pre-discharge induction parameter of a battery; performing pre-adjustment processing on the pre-discharge induction parameter and a preset induction parameter to obtain a pre-discharge inductance adjustment; and sending a power tube loss signal to a battery management system according to the pre-discharge inductance adjustment difference. After the pre-discharge induction parameters are collected, the current pre-discharge detection state of the battery is determined, then the pre-discharge induction parameters are compared with the standard induction parameters, the difference between the current pre-discharge induction quantity of the battery and the specified pre-discharge induction quantity is conveniently determined, and finally the pre-discharge induction quantity of the battery is determined according to the difference value. According to the invention, the pre-discharge working mode of the battery is optimized and adjusted, so that the on-off control of the main power MOS in the charge-discharge loop of the battery is facilitated, surge generated during startup and output short circuit is avoided, and the impact probability of surge current on the main power MOS is effectively reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery pre-discharge protection monitoring method, device, computer equipment and storage medium. Background Art

[0002] Battery terminal devices such as drones have thousands of UF input capacitors inside. The battery generates a surge at the moment of power on. The surge current will impact the terminal device and cause damage to the device. At the same time, the large current will impact the BMS main power MOS. In severe cases, MOS damage will cause safety hazards such as battery protection failure. Moreover, at the battery output end, before a short circuit problem occurs, although short-circuit protection can be performed through a protection board, the surge generated at the moment of the short circuit is also very large, which is also easy to impact the terminal device and cause damage to the device. At the same time, the large current will impact the BMS main power MOS. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a battery pre-discharge protection monitoring method, device, computer equipment and storage medium that effectively reduce the probability of surge current impacting the main power MOS.

[0004] The purpose of this disclosure is achieved through the following technical solutions:

[0005] A battery pre-discharge protection monitoring method, the method comprising:

[0006] Obtain the pre-discharge sensing parameters of the battery;

[0007] The pre-discharge sensing parameter is subjected to pre-discharge adjustment processing with the preset sensing parameter to obtain a pre-discharge sensing adjustment;

[0008] A power tube failure signal is sent to the battery management system according to the pre-discharge sensor balance to adjust the on-off mode of the main power MOS in the battery charging and discharging circuit.

[0009] In one embodiment, the obtaining of the pre-discharge sensing parameters of the battery includes: obtaining the power-on pre-discharge positive electrode voltage of the battery.

[0010] In one embodiment, the pre-discharge sensing parameter is subjected to pre-discharge adjustment processing with a preset sensing parameter to obtain a pre-discharge sensing adjustment, comprising: obtaining an adjustment between the startup pre-discharge positive electrode voltage and a preset startup positive electrode voltage to obtain a startup pre-discharge voltage difference.

[0011] In one of the embodiments, sending a power tube disable signal to a battery management system based on the pre-discharge sensor difference to adjust the on-off mode of a main power MOS in a battery charge and discharge circuit includes: detecting whether the power-on pre-discharge voltage difference is less than a preset power-on voltage difference; when the power-on pre-discharge voltage difference is less than the preset power-on voltage difference, sending a power tube enable signal to the battery management system to turn on the main power MOS.

[0012] In one embodiment, the obtaining of the pre-discharge sensing parameters of the battery includes: obtaining the short-circuit pre-discharge positive electrode voltage of the battery.

[0013] In one embodiment, the pre-discharge adjustment processing of the pre-discharge induction parameter and the preset induction parameter to obtain the pre-discharge induction adjustment includes: obtaining the adjustment of the short-circuit pre-discharge positive electrode voltage and the preset short-circuit positive electrode voltage to obtain the short-circuit pre-discharge voltage difference.

[0014] In one of the embodiments, sending a power tube disable signal to a battery management system based on the pre-discharge sense difference to adjust the on-off mode of a main power MOS in a battery charge and discharge circuit includes: detecting whether the short-circuit pre-discharge voltage difference is less than or equal to a preset short-circuit voltage difference; when the short-circuit pre-discharge voltage difference is less than or equal to the preset short-circuit voltage difference, sending a power tube disable signal to the battery management system to shut down the main power MOS.

[0015] A battery pre-discharge protection monitoring device comprises: a pre-discharge acquisition module, a pre-discharge processing module and a MOS control module; the pre-discharge acquisition module is used to obtain the pre-discharge sensing parameters of the battery; the pre-discharge processing module is used to perform pre-discharge adjustment processing on the pre-discharge sensing parameters and preset sensing parameters to obtain the pre-discharge sensing adjustment; the MOS control module is used to send a power tube failure signal to a battery management system according to the pre-discharge sensing adjustment to adjust the on-off mode of the main power MOS in the battery charging and discharging circuit.

[0016] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0017] Obtain the pre-discharge sensing parameters of the battery;

[0018] The pre-discharge sensing parameter is subjected to pre-discharge adjustment processing with the preset sensing parameter to obtain a pre-discharge sensing adjustment;

[0019] A power tube failure signal is sent to the battery management system according to the pre-discharge sensor balance to adjust the on-off mode of the main power MOS in the battery charging and discharging circuit.

[0020] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0021] Obtain the pre-discharge sensing parameters of the battery;

[0022] The pre-discharge sensing parameter is subjected to pre-discharge adjustment processing with the preset sensing parameter to obtain a pre-discharge sensing adjustment;

[0023] A power tube failure signal is sent to the battery management system according to the pre-discharge sensor balance to adjust the on-off mode of the main power MOS in the battery charging and discharging circuit.

[0024] Compared with the prior art, the present invention has at least the following advantages:

[0025] After the pre-discharge sensing parameters are collected, the current pre-discharge detection state of the battery is determined, and then the pre-discharge sensing parameters are compared with the standard sensing parameters to facilitate the determination of the difference between the current pre-discharge sensing amount of the battery and the specified pre-discharge sensing amount. Finally, according to the above difference value, the pre-discharge working mode of the battery is optimized and adjusted to facilitate the on-off control of the main power MOS in the battery's charge and discharge circuit, avoiding surges at startup and output short circuit, and effectively reducing the probability of surge current impacting the main power MOS. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a flow chart of a battery pre-discharge protection monitoring method in one embodiment;

[0028] Figure 2 A circuit diagram of a pre-discharge detection circuit corresponding to a battery pre-discharge protection monitoring method in an embodiment;

[0029] Figure 3 for Figure 2 NTC volt-ampere curve diagram of the pre-discharge detection circuit;

[0030] Figure 4 for Figure 2 Detection simulation curve diagram of the pre-discharge detection circuit;

[0031] Figure 5 1 is a diagram of the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] The present disclosure relates to a battery pre-discharge protection monitoring method. In one embodiment, the battery pre-discharge protection monitoring method includes obtaining a pre-discharge sensing parameter of a battery; performing pre-discharge leveling processing on the pre-discharge sensing parameter and a preset sensing parameter to obtain a pre-discharge sensing leveling; and sending a power tube failure signal to a battery management system according to the pre-discharge sensing leveling to adjust the on-off mode of a main power MOS in a battery charging and discharging circuit. After the pre-discharge sensing parameter is collected, the current pre-discharge detection state of the battery is determined, and then the pre-discharge sensing parameter is compared with the standard sensing parameter to facilitate determination of the difference between the current pre-discharge sensing amount of the battery and the specified pre-discharge sensing amount. Finally, according to the above difference value, the pre-discharge working mode of the battery is optimized and adjusted to facilitate on-off control of the main power MOS in the battery charging and discharging circuit, thereby avoiding surges at startup and output short circuit, and effectively reducing the probability of surge current impacting the main power MOS.

[0036] See also Figure 1 , which is a flow chart of a battery pre-discharge protection monitoring method according to an embodiment of the present disclosure. The battery pre-discharge protection monitoring method includes part or all of the following steps.

[0037] S100: Obtain pre-discharge sensing parameters of the battery.

[0038] In this embodiment, the pre-discharge sensing parameter is the sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameter is the discharge condition sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter corresponds to the surge condition sensed in the pre-discharge state of the battery. The pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameter, it is convenient to determine the surge condition sensed in the current pre-discharge state of the battery.

[0039] S200: performing pre-discharge adjustment processing on the pre-discharge sensing parameter and the preset sensing parameter to obtain a pre-discharge sensing adjustment.

[0040] In this embodiment, the pre-discharge sensing parameter is the sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameter is the discharge condition sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter corresponds to the surge condition sensed by the pre-discharge state of the battery. Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameter, it is convenient to determine the surge condition sensed in the current pre-discharge state of the battery. The preset sensing parameter is the standard sensing data of the battery in the pre-discharge state, that is, the preset sensing parameter is the reference discharge condition sensed in the pre-discharge state of the battery, that is, the preset sensing parameter corresponds to the specified surge condition sensed by the pre-discharge state of the battery. By pre-leveling the pre-discharge sensing parameter and the preset sensing parameter, it is convenient to determine the difference degree of surge triggering sensed by the pre-discharge state of the battery.

[0041] S300: Sending a power tube failure signal to a battery management system according to the pre-discharge sensor balance to adjust the on-off mode of a main power MOS in a battery charge and discharge circuit.

[0042] In this embodiment, the pre-discharge sensing balance is obtained based on the pre-discharge sensing parameter and the preset sensing parameter, and the pre-discharge sensing parameter is the sensing data of the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter is the discharge condition sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter corresponds to the surge condition sensed in the pre-discharge state of the battery. Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameter, it is convenient to determine the surge condition sensed in the current pre-discharge state of the battery. The preset sensing parameter is the standard sensing data in the pre-discharge state of the battery, that is, the preset sensing parameter is the reference discharge condition sensed in the pre-discharge state of the battery, that is, the preset sensing parameter corresponds to the specified surge condition sensed in the pre-discharge state of the battery. By pre-discharge balance processing of the pre-discharge sensing parameter and the preset sensing parameter, it is convenient to determine the difference degree of surge triggering sensed in the pre-discharge state of the battery. After obtaining the pre-discharge induction balance, the surge difference degree induced by the current pre-discharge state of the battery can be determined, which is convenient for controlling the main power MOS in the battery charging and discharging circuit so that each main power MOS is not damaged when there is a surge.

[0043] In this embodiment, after the pre-discharge sensing parameters are collected, the current pre-discharge detection state of the battery is determined, and then the pre-discharge sensing parameters are compared with the standard sensing parameters to facilitate determination of the difference between the current pre-discharge sensing amount of the battery and the specified pre-discharge sensing amount. Finally, based on the above difference value, the pre-discharge working mode of the battery is optimized and adjusted to facilitate on-off control of the main power MOS in the battery's charge and discharge circuit, thereby avoiding surges at startup and output short circuit, and effectively reducing the probability of surge current impacting the main power MOS.

[0044] In one of the embodiments, the obtaining of the pre-discharge sensing parameters of the battery includes: obtaining the power-on pre-discharge positive electrode voltage of the battery. In this embodiment, the pre-discharge sensing parameters are sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameters are the discharge conditions sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameters correspond to the surge conditions sensed in the pre-discharge state of the battery. By collecting the pre-discharge sensing parameters, it is convenient to determine the surge conditions sensed in the current pre-discharge state of the battery. The pre-discharge sensing parameters include the power-on pre-discharge positive electrode voltage of the battery, and the power-on pre-discharge positive electrode voltage is the power-on positive electrode voltage sensed in the current pre-discharge state of the battery. Specifically, an NTC resistor is added to the positive electrode of the battery to collect the power-on pre-discharge positive electrode voltage. The corresponding circuit diagram is shown in the attached figure for details. Figure 2Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. The delay time is determined based on the NTC volt-ampere curve. For details, see the attached Figure 3 By collecting the startup pre-discharge positive electrode voltage, it is convenient to determine the battery positive electrode voltage during the current pre-discharge process of the battery.

[0045] Further, the pre-discharge sensing parameter and the preset sensing parameter are subjected to pre-discharge adjustment processing to obtain the pre-discharge sensing adjustment, including: obtaining the adjustment of the startup pre-discharge positive electrode voltage and the preset startup positive electrode voltage to obtain the startup pre-discharge voltage difference. In this embodiment, the pre-discharge sensing parameter is the sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameter is the discharge condition sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter corresponds to the surge condition sensed in the pre-discharge state of the battery. Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameter, it is convenient to determine the surge condition sensed in the current pre-discharge state of the battery. The preset sensing parameter is the standard sensing data in the pre-discharge state of the battery, that is, the preset sensing parameter is the reference discharge condition sensed in the pre-discharge state of the battery, that is, the preset sensing parameter corresponds to the specified surge condition sensed in the pre-discharge state of the battery. By performing pre-discharge adjustment processing on the pre-discharge sensing parameters and the preset sensing parameters, it is convenient to determine the difference degree of surge triggering induced by the pre-discharge state of the battery. The pre-discharge sensing parameters include the power-on pre-discharge positive electrode voltage of the battery, and the power-on pre-discharge positive electrode voltage is the power-on positive electrode voltage sensed in the current pre-discharge state of the battery. Specifically, an NTC resistor is added to the positive electrode of the battery to collect the power-on pre-discharge positive electrode voltage. By collecting the power-on pre-discharge positive electrode voltage, it is convenient to determine the battery positive electrode voltage in the current pre-discharge process of the battery. The preset power-on positive electrode voltage is the standard voltage corresponding to the current pre-discharge state of the battery. Specifically, the preset power-on positive electrode voltage is the voltage output from the positive electrode of the battery to the terminal device. By adjusting the power-on pre-discharge positive electrode voltage and the preset power-on positive electrode voltage, the least square difference is obtained for the positive electrode voltage and the positive electrode output voltage of the battery to reduce the error of the power-on pre-discharge voltage difference.

[0046] Furthermore, the sending of a power tube disable signal to the battery management system according to the pre-discharge sense balance to adjust the on-off mode of the main power MOS in the battery's charge and discharge circuit includes: detecting whether the power-on pre-discharge voltage difference is less than the preset power-on voltage difference; when the power-on pre-discharge voltage difference is less than the preset power-on voltage difference, sending a power tube enable signal to the battery management system to turn on the main power MOS. In this embodiment, the pre-discharge sense balance is obtained based on the pre-discharge sensing parameter and the preset sensing parameter, and the pre-discharge sensing parameter is the sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameter is the discharge condition sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter corresponds to the surge condition sensed in the pre-discharge state of the battery. Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameter, it is convenient to determine the surge condition sensed in the current pre-discharge state of the battery. The preset sensing parameters are standard sensing data in the pre-discharge state of the battery, that is, the preset sensing parameters are reference discharge conditions sensed in the pre-discharge state of the battery, that is, the preset sensing parameters correspond to the specified surge conditions sensed in the pre-discharge state of the battery. By pre-discharge leveling the pre-discharge sensing parameters and the preset sensing parameters, it is convenient to determine the difference degree of surge triggering sensed in the pre-discharge state of the battery. After obtaining the pre-discharge leveling, the difference degree of surge sensed in the pre-discharge state of the battery is determined, which is convenient for controlling the main power MOS in the battery's charge and discharge circuit so that each main power MOS is not damaged when there is a surge. The pre-discharge sensing parameters include the power-on pre-discharge positive electrode voltage of the battery, and the power-on pre-discharge positive electrode voltage is the power-on positive electrode voltage sensed in the current pre-discharge state of the battery. Specifically, the power-on pre-discharge positive electrode voltage is collected by adding an NTC resistor to the positive electrode of the battery. By collecting the power-on pre-discharge positive electrode voltage, it is convenient to determine the battery positive electrode voltage during the current pre-discharge process of the battery. The preset power-on positive voltage is the standard voltage corresponding to the current pre-discharge state of the battery. Specifically, the preset power-on positive voltage is the voltage output from the positive electrode of the battery to the terminal device. By adjusting the power-on pre-discharge positive voltage with the preset power-on positive voltage, the least square difference between the positive voltage and the positive output voltage of the battery is obtained to reduce the error of the power-on pre-discharge voltage difference.The power-on pre-discharge voltage difference is smaller than the preset power-on voltage difference, indicating that the voltage difference between the positive electrode voltage and the positive electrode output voltage of the battery is small, that is, the positive electrode voltage and the positive electrode output voltage of the battery are basically consistent, that is, the battery does not generate a surge when it is powered on. At this time, a power tube enable signal is sent to the battery management system to turn on the main power MOS, thereby ensuring the normal operation of the main power MOS and avoiding turning on the main power MOS when there is a surge at power-on.

[0047] In another embodiment, the preset power-on voltage difference is determined according to the NTC specification and the capacitance of the terminal device. For example, if the NTC specification is 10Ω / 6W and the terminal device is a 44000uf capacitive device, the preset power-on voltage difference is 29.8V, and the corresponding power-on waveform is as follows: Figure 4 shown.

[0048] In another embodiment, when the power-on pre-discharge voltage difference is greater than or equal to the preset power-on voltage difference, a power tube disabling signal is sent to the battery management system to shut down the main power MOS. At this time, the voltage difference between the positive electrode voltage and the positive electrode output voltage of the battery is too large, and there is a power-on surge. By shutting down the main power MOS, it is avoided that the surge impacts the main power MOS and damages it.

[0049] In one of the embodiments, the obtaining of the pre-discharge sensing parameters of the battery includes: obtaining the short-circuit pre-discharge positive electrode voltage of the battery. In this embodiment, the pre-discharge sensing parameters are sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameters are the discharge conditions sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameters correspond to the surge conditions sensed in the pre-discharge state of the battery. Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameters, it is convenient to determine the surge conditions sensed in the current pre-discharge state of the battery. The pre-discharge sensing parameters include the short-circuit pre-discharge positive electrode voltage of the battery, and the short-circuit pre-discharge positive electrode voltage is the short-circuit positive electrode voltage sensed in the current pre-discharge state of the battery. Specifically, a PTC resistor is added to the positive electrode of the battery to collect the short-circuit pre-discharge positive electrode voltage. The corresponding circuit diagram is shown in the attached figure for details. Figure 2 By collecting the short-circuit pre-discharge positive electrode voltage, it is convenient to determine the battery positive electrode voltage during the current pre-discharge process of the battery.

[0050] Further, the pre-discharge sensing parameter and the preset sensing parameter are subjected to pre-discharge adjustment processing to obtain the pre-discharge sensing adjustment, including: obtaining the adjustment of the short-circuit pre-discharge positive electrode voltage and the preset short-circuit positive electrode voltage to obtain the short-circuit pre-discharge voltage difference. In this embodiment, the pre-discharge sensing parameter is the sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameter is the discharge condition sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter corresponds to the surge condition sensed in the pre-discharge state of the battery. Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameter, it is convenient to determine the surge condition sensed in the current pre-discharge state of the battery. The preset sensing parameter is the standard sensing data of the battery in the pre-discharge state, that is, the preset sensing parameter is the reference discharge condition sensed in the pre-discharge state of the battery, that is, the preset sensing parameter corresponds to the specified surge condition sensed in the pre-discharge state of the battery. By performing pre-discharge adjustment processing on the pre-discharge sensing parameters and the preset sensing parameters, it is convenient to determine the difference degree of surge triggering induced by the pre-discharge state of the battery. The pre-discharge sensing parameters include the short-circuit pre-discharge positive electrode voltage of the battery, and the short-circuit pre-discharge positive electrode voltage is the short-circuit positive electrode voltage induced in the current pre-discharge state of the battery. Specifically, a PTC resistor is added to the positive electrode of the battery to collect the short-circuit pre-discharge positive electrode voltage. By collecting the short-circuit pre-discharge positive electrode voltage, it is convenient to determine the positive electrode voltage of the battery during the current pre-discharge process of the battery. The preset short-circuit positive electrode voltage is the standard voltage corresponding to the current pre-discharge state of the battery. Specifically, the preset short-circuit positive electrode voltage is the short-circuit voltage output from the positive electrode of the battery to the terminal device, for example, 0V voltage. By adjusting the short-circuit pre-discharge positive electrode voltage and the preset short-circuit positive electrode voltage, the least square difference of the positive electrode voltage and the positive electrode output voltage of the battery is obtained to reduce the error of the short-circuit pre-discharge voltage difference.

[0051] Furthermore, the sending of a power tube disabling signal to the battery management system according to the pre-discharge sense difference to adjust the on-off mode of the main power MOS in the charge and discharge circuit of the battery includes: detecting whether the short-circuit pre-discharge voltage difference is less than or equal to the preset short-circuit voltage difference; when the short-circuit pre-discharge voltage difference is less than or equal to the preset short-circuit voltage difference, sending a power tube disabling signal to the battery management system to shut down the main power MOS. In this embodiment, the pre-discharge sense difference is obtained based on the pre-discharge sensing parameter and the preset sensing parameter, and the pre-discharge sensing parameter is the sensing data of the battery in the current pre-discharge state, that is, the pre-discharge sensing parameter is the discharge condition sensed in the current pre-discharge state of the battery, that is, the pre-discharge sensing parameter corresponds to the surge condition sensed in the pre-discharge state of the battery. Among them, the pre-discharge state is executed in a delayed manner, that is, the pre-discharge operation is performed by delaying within a specified time. By collecting the pre-discharge sensing parameter, it is convenient to determine the surge condition sensed in the current pre-discharge state of the battery. The preset sensing parameter is the standard sensing data of the battery in the pre-discharge state, that is, the preset sensing parameter is the reference discharge condition sensed in the pre-discharge state of the battery, that is, the preset sensing parameter corresponds to the specified surge condition sensed in the pre-discharge state of the battery. By pre-discharge leveling the pre-discharge sensing parameter and the preset sensing parameter, it is convenient to determine the difference degree of surge triggering sensed in the pre-discharge state of the battery. After obtaining the pre-discharge leveling, the difference degree of surge sensed in the pre-discharge state of the battery is determined, which is convenient for controlling the main power MOS in the battery's charge and discharge circuit so that each main power MOS is not damaged when there is a surge. The pre-discharge sensing parameter includes the short-circuit pre-discharge positive electrode voltage of the battery, and the short-circuit pre-discharge positive electrode voltage is the short-circuit positive electrode voltage sensed in the current pre-discharge state of the battery. Specifically, a PTC resistor is added to the positive electrode of the battery to collect the short-circuit pre-discharge positive electrode voltage. By collecting the short-circuit pre-discharge positive electrode voltage, it is convenient to determine the positive electrode voltage of the battery during the current pre-discharge process of the battery. The preset short-circuit positive electrode voltage is the standard voltage corresponding to the current pre-discharge state of the battery. Specifically, the preset short-circuit positive electrode voltage is the voltage output from the positive electrode of the battery to the terminal device, for example, 0V voltage. By adjusting the short-circuit pre-discharge positive electrode voltage with the preset short-circuit positive electrode voltage, the least square difference of the positive electrode voltage and the positive electrode output voltage of the battery is obtained to reduce the error of the short-circuit pre-discharge voltage difference.The short-circuit pre-discharge voltage difference is less than or equal to the preset short-circuit voltage difference, indicating that the voltage difference between the positive electrode voltage and the positive electrode output voltage of the battery is small, that is, the positive electrode voltage and the positive electrode output voltage of the battery are basically consistent, which also means that the battery will generate a short-circuit surge. At this time, a power tube disable signal is sent to the battery management system to shut down the main power MOS to avoid damage to the main power MOS due to surge impact.

[0052] In another embodiment, when the short-circuit pre-discharge voltage difference is greater than the preset short-circuit voltage difference, a power tube enable signal is sent to the battery management system to turn on the main power MOS. The short-circuit pre-discharge voltage difference is greater than the preset short-circuit voltage difference, indicating that the voltage difference between the positive electrode voltage and the positive electrode output voltage of the battery is large, that is, indicating that the positive electrode voltage of the battery is greater than the positive electrode output voltage, that is, indicating that the battery is not short-circuited, and surges cannot be generated. At this time, by sending a power tube enable signal to the battery management system to turn on the main power MOS, the normal operation of the main power MOS is ensured, and the main power MOS is avoided from being turned on when there is a surge in the short circuit.

[0053] In another embodiment, while the main power MOS is prohibited from being turned on, the pre-discharge MOS is also turned off. The specific process is detailed in the attached Figure 5 .

[0054] During the actual pre-discharge process of the battery, the battery forms a battery module by connecting single cells in series and parallel. Batch batteries are usually stored in an energy storage box. During the pre-discharge process of a large number of batteries, the temperature of each single cell in the whole box will change according to the battery pre-discharge current adjustment. Due to the space limited in the energy storage box, the batch batteries will accumulate heat in the closed box and there is a risk of thermal runaway and fire, which will seriously lead to uncontrollable fire.

[0055] In order to effectively reduce the probability of thermal runaway of the battery during the pre-discharge process, the power tube failure signal is sent to the battery management system according to the pre-discharge sensor difference to adjust the on-off mode of the main power MOS in the battery charging and discharging circuit, and then the following steps are also included:

[0056] Get the overheated battery built-in separation amount of the battery;

[0057] Detecting whether the built-in separation amount of the overheated battery is less than or equal to a preset separation amount;

[0058] When the internal separation amount of the overheated battery is less than or equal to the preset separation amount, an internal reduction and edge increase power signal is sent to the battery management system.

[0059] In this embodiment, the built-in separation amount of the overheated batteries is the number of spacing batteries between the overheated batteries located in the middle area of ​​the energy storage box. Specifically, the built-in separation amount of the overheated batteries is the median value of the number of spacing batteries between the overheated batteries located in the middle area of ​​the energy storage box. By collecting the built-in separation amount of the overheated batteries, it is convenient to determine the density between the overheated batteries located in the middle area of ​​the energy storage box. The built-in separation amount of the overheated batteries is less than or equal to the preset separation amount, indicating that the number of interval batteries between the overheated batteries located in the middle area of ​​the energy storage box is too large, that is, it indicates that the density of the overheated batteries located in the middle area of ​​the energy storage box is too high, that is, it indicates that the batteries located in the middle area of ​​the energy storage box are prone to thermal runaway and fire risks. At this time, by sending an internal reduction and edge increase power signal to the battery management system, the pre-discharge current of the batteries located in the middle area of ​​the energy storage box is reduced, and the pre-discharge current of the batteries located in the edge area of ​​the energy storage box is increased, so that the less discharged power of the batteries located in the middle area of ​​the energy storage box is balanced through the more discharged power of the batteries located in the edge area of ​​the energy storage box, so that the overall temperature in the energy storage box is kept consistent while ensuring that the remaining power of the batteries after final discharge meets the normal working requirements.

[0060] Furthermore, the detecting whether the built-in separation amount of the overheated battery is less than or equal to a preset separation amount further includes:

[0061] When the internal separation amount of the overheated battery is greater than the preset separation amount, obtaining the internal field space occupancy ratio of the overheated battery of the battery;

[0062] Detecting whether the space occupancy ratio of the over-temperature battery field is greater than or equal to a preset occupancy ratio;

[0063] When the space occupancy ratio of the over-temperature battery inner field is greater than or equal to the preset occupancy ratio, an inner shrinkage delay time signal is sent to the battery management system.

[0064] In this embodiment, the built-in separation amount of the overheated battery is greater than the preset separation amount, indicating that the number of interval batteries between the overheated batteries located in the middle area of ​​the energy storage box is too small, that is, the density of the overheated batteries located in the middle area of ​​the energy storage box is too low, that is, the overheating risk caused by the overheated batteries in the middle of the energy storage box is relatively low. At this time, by collecting the overheated battery inner field space occupancy ratio of the battery, the distribution ratio of the overheated batteries in the middle of the energy storage box is determined. Specifically, the overheated battery inner field space occupancy ratio is the ratio of the space size of the overheated batteries in the middle area of ​​the energy storage box. The overheated battery inner field space occupancy ratio is greater than or equal to the preset occupancy ratio, indicating that the overheated battery occupies too much space in the middle area of ​​the energy storage box, that is, the number of overheated batteries in the middle area of ​​the energy storage box exceeds the number of overheated batteries in the edge area of ​​the energy storage box. At this time, by sending an inner shrinkage delay time signal to the battery management system, the discharge time of the overheated batteries in the middle area of ​​the energy storage box is shortened, and the discharge time of the overheated batteries in the edge area of ​​the energy storage box is extended. Under the condition of ensuring that the remaining power of the battery after the final discharge meets the normal working requirements, the risk of thermal runaway is further avoided.

[0065] In another embodiment, when the field space occupancy ratio of the over-temperature battery is less than the preset occupancy ratio, the current uniform discharge time and discharge current of each battery are maintained.

[0066] The above-mentioned various preset variables are all set in the database for timely retrieval, and different preset variables are placed in different storage units, that is, in different storage stacks. Moreover, the built-in partition volume of the overheated battery and the space occupancy ratio of the overheated battery field can be collected through corresponding detectors, for example, through the infrared imager and counter in the pre-discharge collection module.

[0067] In one of the embodiments, the present disclosure also relates to a battery pre-discharge protection monitoring device, comprising: a pre-discharge acquisition module, a pre-discharge processing module and a MOS control module; the pre-discharge acquisition module is used to obtain the pre-discharge sensing parameters of the battery; the pre-discharge processing module is used to perform pre-discharge adjustment processing on the pre-discharge sensing parameters and preset sensing parameters to obtain the pre-discharge sensing adjustment; the MOS control module is used to send a power tube failure signal to a battery management system according to the pre-discharge sensing adjustment to adjust the on-off mode of the main power MOS in the battery's charging and discharging circuit.

[0068] In this embodiment, after the pre-discharge acquisition module collects the pre-discharge sensing parameters, the current pre-discharge detection state of the battery is determined, and then the pre-discharge processing module compares the pre-discharge sensing parameters with the standard sensing parameters to facilitate determining the difference between the current pre-discharge sensing amount of the battery and the specified pre-discharge sensing amount. Finally, the MOS control module optimizes and adjusts the pre-discharge working mode of the battery according to the above difference value, which is convenient for on-off control of the main power MOS in the battery's charging and discharging circuit, avoiding surges at startup and output short circuit, and effectively reducing the probability of surge current impacting the main power MOS.

[0069] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 5 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as battery configuration state parameters, battery configuration screening and adjustment, and battery batch configuration start and stop signals. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a battery pre-discharge protection monitoring method is implemented.

[0070] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0071] In one of the embodiments, the present application further provides a computer device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0072] In one of the embodiments, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0073] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0074] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the attached claims.

Claims

1. A battery pre-discharge protection monitoring method, characterized in that: include: Obtain the pre-discharge sensing parameters of the battery; The pre-discharge sensing parameter is subjected to pre-discharge adjustment processing with the preset sensing parameter to obtain a pre-discharge sensing adjustment; A power tube failure signal is sent to the battery management system according to the pre-discharge sensor balance to adjust the on-off mode of the main power MOS in the battery charging and discharging circuit.

2. The battery pre-discharge protection monitoring method according to claim 1, characterized in that: The obtaining of the pre-discharge sensing parameters of the battery includes: The power-on pre-discharge positive electrode voltage of the battery is obtained.

3. The battery pre-discharge protection monitoring method according to claim 2, characterized in that: The pre-discharge sensing parameter is subjected to pre-discharge adjustment processing with a preset sensing parameter to obtain a pre-discharge sensing adjustment, comprising: The difference between the startup pre-discharge positive electrode voltage and the preset startup positive electrode voltage is calculated to obtain the startup pre-discharge voltage difference.

4. The battery pre-discharge protection monitoring method according to claim 3, characterized in that: The method of sending a power tube failure signal to a battery management system according to the pre-discharge sensor balance to adjust the on-off mode of a main power MOS in a battery charge and discharge circuit includes: Detecting whether the power-on pre-discharge voltage difference is less than a preset power-on voltage difference; When the power-on pre-discharge voltage difference is less than the preset power-on voltage difference, a power tube enable signal is sent to the battery management system to turn on the main power MOS.

5. The battery pre-discharge protection monitoring method according to claim 1, characterized in that: The obtaining of the pre-discharge sensing parameters of the battery includes: The short-circuit pre-discharge positive electrode voltage of the battery is obtained.

6. The battery pre-discharge protection monitoring method according to claim 5, characterized in that: The pre-discharge sensing parameter is subjected to pre-discharge adjustment processing with a preset sensing parameter to obtain a pre-discharge sensing adjustment, comprising: The difference between the short-circuit pre-discharge positive electrode voltage and the preset short-circuit positive electrode voltage is calculated to obtain the short-circuit pre-discharge voltage difference.

7. The battery pre-discharge protection monitoring method according to claim 6, characterized in that: The method of sending a power tube failure signal to a battery management system according to the pre-discharge sensor balance to adjust the on-off mode of a main power MOS in a battery charge and discharge circuit includes: Detecting whether the short-circuit pre-discharge voltage difference is less than or equal to a preset short-circuit voltage difference; When the short-circuit pre-discharge voltage difference is less than or equal to the preset short-circuit voltage difference, a power tube disabling signal is sent to the battery management system to shut down the main power MOS.

8. A battery pre-discharge protection monitoring device, characterized in that: include: A pre-discharge acquisition module, which is used to obtain pre-discharge sensing parameters of the battery; A pre-discharge processing module, the pre-discharge processing module is used to perform pre-discharge adjustment processing on the pre-discharge sensing parameters and preset sensing parameters to obtain a pre-discharge sensing adjustment; The MOS control module is used to send a power tube failure signal to the battery management system according to the pre-discharge inductance difference to adjust the on-off mode of the main power MOS in the battery charging and discharging circuit.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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