Control method, device, equipment and storage medium to avoid damage to power battery pack

Abstract

The present invention relates to the field of battery protection technology, and discloses a control method, device, equipment and storage medium for avoiding damage to a power battery pack. The method comprises: obtaining the current pressure and the current relative humidity of the external environment, and obtaining the outlet pressure of an explosion-proof device and the relative humidity of the gas after drying; calculating the current relative air pressure difference according to the current pressure and the outlet pressure, and calculating the current humidity difference according to the current relative air humidity and the relative air humidity; drying the hot and humid air entering the power battery pack through a target drying device according to the current relative air humidity and the current temperature difference, so as to avoid damage to the power battery pack; through the above manner, when the air pressure conditions and the condensation humidity are met, the hot and humid air about to enter the power battery pack is dried by the target drying device, so as to effectively avoid damage to the power battery pack by temperature and humidity.

Description

Technical Field

[0001] The present invention relates to the field of battery protection technology, and in particular to a control method, device, equipment and storage medium for preventing power battery packs from being damaged. Background Art

[0002] As one of the important components of electric vehicles, the power battery pack provides power to multiple devices of electric vehicles. If the power battery pack is abnormal, it will inevitably bring driving hazards, and the internal temperature and humidity are important performance indicators to ensure the safety of the power battery pack. When electric vehicles are driving in areas with large day and night temperatures, large humidity changes, and long rainy seasons, the battery system where the power battery pack is located is prone to condensation, and the generation of condensation will cause various hazards to the battery system, such as insulation short circuit and spontaneous combustion of the battery system, which will damage the power battery pack. At present, the relevant technologies to prevent the power battery pack from being damaged are divided into two aspects. The first aspect is to ensure the sealing of the box that encapsulates the power battery pack to meet the waterproof level requirements of IP67 or even IP68. The second aspect is to ensure the insulation function of the battery system to prevent the internal environment from changing rapidly with the change of external temperature. However, the above-mentioned related technologies require the balance valve to interact with the outside air, and cannot prevent gaseous water from entering the power battery pack. The power battery pack will still be damaged due to temperature and humidity.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a control method, device, equipment and storage medium to prevent damage to a power battery pack, aiming to solve the technical problem that the prior art cannot effectively prevent the power battery pack from being damaged by temperature and humidity.

[0005] To achieve the above object, the present invention provides a control method for preventing damage to a power battery pack, the control method for preventing damage to a power battery pack comprising the following steps:

[0006] Obtain the current pressure of the external environment and the current relative humidity of the atmosphere, as well as the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying;

[0007] Calculating a current relative air pressure difference according to the current pressure and the outlet pressure, and calculating a current humidity difference according to the current atmospheric relative humidity and the gas relative humidity;

[0008] The hot and humid air entering the power battery pack is dried by a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack.

[0009] Optionally, drying the hot and humid air entering the power battery pack by a target drying device according to the current relative air pressure difference and the current humidity difference to avoid damage to the power battery pack includes:

[0010] When the current relative air pressure difference is greater than a preset pressure threshold, determining whether the current humidity difference is greater than a preset humidity threshold;

[0011] When the current humidity difference is greater than a preset humidity threshold, obtaining a current state of the target drying device;

[0012] When the current state is the closed state, setting the current state of the target drying device to the open state through a first start instruction;

[0013] The hot and humid air entering the power battery pack is dried by the target drying device in the turned-on state to avoid damage to the power battery pack.

[0014] Optionally, drying the hot and humid air entering the power battery pack by the target drying device in the turned-on state to avoid damage to the power battery pack includes:

[0015] When it is detected that hot and humid air from the external environment enters the air path connected to the power battery pack, obtaining the current temperature of the heating device in the target drying device in the turned-on state;

[0016] When the current temperature is not within a preset temperature range, heating the heating device;

[0017] Real-time monitoring of the temperature of the heating device during the heating process;

[0018] When the temperature of the heating device is within a preset temperature range, the humid hot air entering the power battery pack is heated by the heating device to obtain target humid hot air;

[0019] The target hot and humid air is dried by the silica gel desiccant in the target drying device to avoid damage to the power battery pack.

[0020] Optionally, drying the target hot and humid air by means of a silica gel desiccant in the target drying device to avoid damage to the power battery pack includes:

[0021] Drying the target hot and humid air by means of a silica gel desiccant in the target drying device to obtain current dry air;

[0022] Obtaining the internal pressure according to the current dry air and the outlet pressure of the explosion-proof device;

[0023] Calculating a relative pressure difference based on the internal pressure and the current pressure of the external environment;

[0024] When the relative pressure difference is greater than a preset pressure difference threshold, obtaining a current state of the current gas valve;

[0025] When the current state of the current gas valve is a closed state, setting the current state of the current gas valve to an open state through a second start instruction;

[0026] The current dry air is discharged through the current air valve in the open state to avoid damage to the power battery pack.

[0027] Optionally, before drying the hot and humid air entering the power battery pack by the turned-on target drying device to avoid damage to the power battery pack, the method further includes:

[0028] Obtaining the current state of the target vehicle, and determining whether the current state of the target vehicle is a start state;

[0029] When the current state of the target vehicle is not the start state, generating preset condensation alarm information according to the current relative air pressure difference and the current humidity difference;

[0030] The preset condensation alarm information is broadcasted through the target sound device, so that the user can adjust the current state of the target vehicle within the preset time by starting the device;

[0031] When it is detected that the current state of the target vehicle is the start state, the step of drying the hot and humid air entering the power battery pack by the target drying device in the start state is continued.

[0032] Optionally, when the current relative air pressure difference is greater than a preset pressure threshold, after determining whether the current humidity difference is greater than a preset humidity threshold, the method further includes:

[0033] When the current humidity difference is less than a preset humidity threshold, obtaining a current state of the target gas valve;

[0034] When the current state of the target gas valve is a closed state, setting the current state of the target gas valve to an open state through a third start instruction;

[0035] The hot and humid gas from the external environment is sucked into the gas path through the target gas valve in the open state to avoid damage to the box cover that wraps the power battery pack.

[0036] Optionally, after drying the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference to avoid damage to the power battery pack, the method further includes:

[0037] Acquire the current temperature of the power battery pack, and calculate the current temperature difference according to the current temperature and a preset temperature threshold;

[0038] When the current temperature difference is greater than a preset temperature difference threshold, generating a heat dissipation control strategy according to the current temperature difference and the thermal management device;

[0039] According to the heat dissipation control strategy, the circulating water pump, condenser, compressor, cooler and refrigerant expansion valve in the thermal management device are controlled to reduce the current temperature of the power battery pack.

[0040] In addition, to achieve the above-mentioned purpose, the present invention further proposes a control device for preventing damage to a power battery pack, the control device for preventing damage to a power battery pack comprising:

[0041] An acquisition module is used to acquire the current pressure of the external environment and the current relative humidity of the atmosphere, as well as the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying;

[0042] A calculation module, used to calculate a current relative air pressure difference according to the current pressure and the outlet pressure, and to calculate a current humidity difference according to the current atmospheric relative humidity and the gas relative humidity;

[0043] The drying module is used to dry the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack.

[0044] In addition, to achieve the above-mentioned purpose, the present invention also proposes a control device for avoiding damage to a power battery pack, wherein the control device for avoiding damage to a power battery pack comprises: a memory, a processor, and a control program for avoiding damage to a power battery pack stored in the memory and executable on the processor, wherein the control program for avoiding damage to a power battery pack is configured to implement the control method for avoiding damage to a power battery pack as described above.

[0045] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which is stored a control program for avoiding damage to a power battery pack. When the control program for avoiding damage to a power battery pack is executed by a processor, the control method for avoiding damage to a power battery pack as described above is implemented.

[0046] The control method for avoiding damage to the power battery pack proposed in the present invention obtains the current pressure and the current relative humidity of the external environment, and obtains the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying; calculates the current relative air pressure difference according to the current pressure and the outlet pressure, and calculates the current humidity difference according to the current relative air humidity and the relative humidity of the gas; dries the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack; through the above method, when the air pressure conditions and condensation humidity are met, the hot and humid air that is about to enter the power battery pack is dried by the target drying device, thereby effectively avoiding damage to the power battery pack due to temperature and humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of a control device for preventing power battery pack damage in a hardware operating environment involved in an embodiment of the present invention;

[0048] Figure 2 A schematic flow chart of a first embodiment of a control method for preventing power battery pack damage according to the present invention;

[0049] Figure 3 A schematic diagram of the structure of a drying device of a control method for preventing power battery pack damage according to the present invention;

[0050] Figure 4 A schematic flow chart of a second embodiment of a control method for preventing power battery pack damage according to the present invention;

[0051] Figure 5 This is a schematic diagram of the functional modules of the first embodiment of the control device for preventing power battery pack damage according to the present invention.

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0054] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a control device for preventing power battery pack damage in a hardware operating environment according to an embodiment of the present invention.

[0055] like Figure 1As shown, the control device for avoiding damage to the power battery pack may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or it may be a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0056] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the control device for preventing damage to the power battery pack, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0057] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a control program for preventing the power battery pack from being damaged.

[0058] exist Figure 1 In the control device for avoiding power battery pack damage shown, the network interface 1004 is mainly used for data communication with the network integration platform workstation; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the control device for avoiding power battery pack damage of the present invention can be arranged in the control device for avoiding power battery pack damage, and the control device for avoiding power battery pack damage calls the control program for avoiding power battery pack damage stored in the memory 1005 through the processor 1001, and executes the control method for avoiding power battery pack damage provided in the embodiment of the present invention.

[0059] Based on the above hardware structure, an embodiment of a control method for preventing a power battery pack from being damaged is proposed.

[0060] Reference Figure 2 , Figure 2 This is a flow chart of a first embodiment of a control method for preventing power battery pack damage according to the present invention.

[0061] In a first embodiment, the control method for preventing damage to the power battery pack includes the following steps:

[0062] Step S10, obtaining the current pressure of the external environment and the current relative humidity of the atmosphere, as well as obtaining the outlet pressure of the explosion-proof device and the relative humidity of the dried gas.

[0063] It should be noted that the executor of this embodiment is a control device for preventing damage to the power battery pack. It can also be other devices that can achieve the same or similar functions, such as a vehicle controller, etc. This embodiment does not limit this. In this embodiment, the vehicle controller is taken as an example for explanation.

[0064] It should be understood that the current pressure refers to the pressure formed by the air in the external environment where the target vehicle is located, and the current pressure can be measured by a pressure sensor arranged outside the drying device. Similarly, the current atmospheric relative humidity refers to the air humidity of the external environment where the target vehicle is located, and the current atmospheric relative humidity can be measured by a humidity sensor arranged outside the drying device. The outlet pressure refers to the pressure at the outlet of the explosion-proof device, and the explosion-proof device can be a balanced explosion-proof valve. The gas relative humidity refers to the relative humidity of the gas that has been preliminarily dried by the drying device.

[0065] Step S20, calculating the current relative air pressure difference according to the current pressure and the outlet pressure, and calculating the current humidity difference according to the current atmospheric relative humidity and the gas relative humidity.

[0066] It can be understood that the current relative air pressure difference refers to the pressure difference between the current pressure and the outlet pressure. For example, the current pressure of the external environment is A Pa, and the outlet pressure of the explosion-proof device is B Pa, then the current relative air pressure difference is (AB) Pa. The current humidity difference refers to the humidity difference between the current atmospheric relative humidity and the gas relative humidity. For example, the current atmospheric relative humidity of the external environment is a%, and the relative humidity of the gas after drying is b%, then the current humidity difference is (a%-b%).

[0067] Step S30 , drying the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack.

[0068] It should be understood that after obtaining the current relative air pressure difference and the current humidity difference, it is necessary to determine whether the conditions that the current relative air pressure difference is greater than the preset pressure threshold and the current humidity difference is greater than the preset humidity threshold are met. If so, it is necessary to use a target drying device to dry the hot and humid air entering the power battery pack. At this time, the hot and humid air becomes dry air, and condensation will not form on the surface of the power battery pack, thereby avoiding damage to the power battery pack.

[0069] Furthermore, after step S30, it also includes: obtaining the current temperature of the power battery pack, and calculating the current temperature difference according to the current temperature and a preset temperature threshold; when the current temperature difference is greater than the preset temperature difference threshold, generating a heat dissipation control strategy according to the current temperature difference and the thermal management device; and controlling the circulating water pump, condenser, compressor, cooler and refrigerant expansion valve in the thermal management device according to the heat dissipation control strategy to reduce the current temperature of the power battery pack.

[0070] It can be understood that the current temperature refers to the temperature of the battery pack after being dried by the target drying device, and the current temperature can be collected by a temperature sensor. The current temperature difference refers to the difference between the safety temperature threshold of the power battery pack and the current temperature. When the current temperature difference is greater than the preset temperature difference, it indicates that the internal structure of the power battery pack will be damaged and the performance will be reduced due to high temperature. At this time, it is necessary to control the thermal management device to dissipate the heat of the power battery pack. The heat dissipation control strategy refers to the control strategy for reducing the temperature of the power battery pack, which is specifically achieved by controlling the working hours of the circulating water pump, condenser, compressor and cooler. During the control process, the refrigerant expansion valve will also be adjusted to reduce the current temperature of the power battery pack, so that the final temperature of the power battery pack drops to the safe temperature range in the shortest time.

[0071] It should be understood that reference Figure 3 , Figure 3 It is a structural diagram of the drying device, specifically: 1 and 3 are pressure sensors, pressure sensor 1 is used to measure the current pressure of the external environment, pressure sensor 3 is used to measure the outlet pressure and of the explosion-proof device, 2 is a humidity sensor, 4 is a silica gel desiccant and a fixing device, 5 is a mesh heating device, 6 is a balanced explosion-proof valve, and the connection method between the pipeline and the balanced explosion-proof valve can be at least one of bonding, interference fit or a combination of bolts and sealing rings.

[0072] This embodiment obtains the current pressure and current relative humidity of the external environment, as well as the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying; calculates the current relative air pressure difference according to the current pressure and the outlet pressure, and calculates the current humidity difference according to the current relative air humidity and the relative humidity of the gas; dries the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack; through the above method, when the air pressure conditions and condensation humidity are met, the hot and humid air that is about to enter the power battery pack is dried by the target drying device, so as to effectively prevent the power battery pack from being damaged by temperature and humidity.

[0073] In one embodiment, if Figure 4 Based on the first embodiment, a second embodiment of the control method for preventing power battery pack damage according to the present invention is proposed. Step S30 includes:

[0074] Step S301, when the current relative air pressure difference is greater than a preset pressure threshold, it is determined whether the current humidity difference is greater than a preset humidity threshold.

[0075] It should be understood that after obtaining the current relative air pressure difference, it is necessary to determine whether the current relative air pressure difference is greater than the preset pressure threshold. If so, it indicates that the hot and humid air from the external environment will enter the power battery pack. The preset pressure threshold can be 0 Pa, and then continue to determine whether the current humidity difference is greater than the preset humidity threshold.

[0076] Furthermore, after determining whether the current humidity difference is greater than a preset humidity threshold, it also includes: when the current humidity difference is less than the preset humidity threshold, obtaining a current state of the target gas valve; when the current state of the target gas valve is a closed state, setting the current state of the target gas valve to an open state through a third start instruction; and sucking the hot and humid gas from the external environment into the gas path through the open target gas valve to avoid damage to the box cover that wraps the power battery pack.

[0077] It can be understood that when it is determined that the current relative air pressure difference and the preset pressure threshold and the current humidity difference are less than the preset humidity threshold, it indicates that the hot and humid air from the external environment will enter the power battery pack but will not form condensation on the surface. At this time, in order to avoid damage to the box cover that wraps the power battery pack due to excessive internal air pressure, the internal air pressure needs to be discharged outwardly. Specifically, the current state of the target air valve for exhaust is judged. When the current state is the closed state, the current state of the target air valve is set to the open state through the third start instruction, and then the hot and humid air is discharged through the air path to avoid damage to the box cover that wraps the power battery pack.

[0078] Step S302, when the current humidity difference is greater than a preset humidity threshold, obtaining the current state of the target drying device.

[0079] It can be understood that when it is determined that the current humidity difference is greater than the preset humidity threshold, it indicates that the incoming hot and humid air will form condensation on the surface of the power battery pack. At this time, it needs to be dried by a target drying device. Before drying, it is necessary to judge the current state of the target drying device, and the current state includes the open state and the closed state.

[0080] Step S303, when the current state is the closed state, setting the current state of the target drying device to the open state through a first start instruction.

[0081] It should be understood that the first start-up instruction refers to an instruction to set the target drying device to the on state. When it is determined that the current state of the target drying device is the off state, it indicates that the target drying device is not working. At this time, the current state of the target drying device is switched from the off state to the on state through the first start-up instruction.

[0082] Step S304 , drying the hot and humid air entering the power battery pack by the target drying device in the turned-on state to avoid damage to the power battery pack.

[0083] Further, step S304 includes: when it is detected that hot and humid air from the external environment enters the air path connected to the power battery pack, obtaining the current temperature of the heating device in the target drying device in the turned-on state; when the current temperature is not within a preset temperature range, heating the heating device; monitoring the temperature of the heating device in real time during the heating process; when the temperature of the heating device is within a preset temperature range, heating the hot and humid air entering the power battery pack by the heating device to obtain target hot and humid air; and drying the target hot and humid air by the silica gel desiccant in the target drying device to avoid damage to the power battery pack.

[0084] It should be understood that the current temperature refers to the temperature of the heating device in the target drying device. When it is detected that hot and humid air from the external environment enters the air path connected to the power battery pack, the temperature of the heating device is collected by the temperature sensor to obtain the current temperature of the heating device, and then it is determined whether the current temperature is within the preset temperature range. If not, the silica gel desiccant cannot be effectively dehydrated, that is, the heating device needs to be at a temperature within the preset temperature range to ensure the effective dehydration of the silica gel desiccant. At this time, the heating device needs to be heated so that the temperature of the heated heating device is within the preset temperature range. Then, the target hot and humid air is dried by the silica gel desiccant in the target drying device. The silica gel desiccant has the characteristic of being able to be heated multiple times, and the particles have a specification of 1-3mm. The silica gel desiccant is limited by a metal plate densely covered with circular holes with a diameter of 0.8mm. The shape of the heating device can be mesh.

[0085] Furthermore, the target hot and humid air is dried by the silica gel desiccant in the target drying device to avoid damage to the power battery pack, including: drying the target hot and humid air by the silica gel desiccant in the target drying device to obtain current dry air; obtaining the internal pressure according to the current dry air and the outlet pressure of the explosion-proof device; calculating the relative pressure difference according to the internal pressure and the current pressure of the external environment; when the relative pressure difference is greater than a preset pressure difference threshold, obtaining the current state of the current air valve; when the current state of the current air valve is a closed state, setting the current state of the current air valve to an open state through a second start instruction; and discharging the current dry air through the current air valve in the open state to avoid damage to the power battery pack.

[0086] It can be understood that after the humid hot air enters the power battery pack, the silica gel desiccant is first used to dry the target humid hot air. At this time, the relative humidity of the humid hot air is low, and the internal pressure will increase, which is specifically the sum of the pressure corresponding to the current dry air and the outlet pressure of the explosion-proof device. When the current relative pressure difference is greater than the preset pressure difference threshold, it indicates that the internal gas can be discharged through the pressure difference. At this time, it is necessary to determine whether the current state of the current air valve is in the open state. If not, it is necessary to set the current state of the air valve to the open state through the second start-up instruction, and then discharge the previous dry air to avoid damage to the power battery pack.

[0087] Furthermore, before step S304, it also includes: obtaining the current state of the target vehicle, and determining whether the current state of the target vehicle is a startup state; when the current state of the target vehicle is not a startup state, generating a preset condensation alarm message according to the current relative air pressure difference and the current humidity difference; broadcasting the preset condensation alarm message through a target sound device, so that the user can adjust the current state of the target vehicle within a preset time through a startup device; when it is detected that the current state of the target vehicle is a startup state, continuing to execute the step of drying the hot and humid air entering the power battery pack through the target drying device in the turned-on state.

[0088] It should be understood that the preset condensation alarm information refers to the early warning information that condensation is about to occur on the surface of the power battery pack, that is, the vehicle can only be dried when it is in the started state. After the preset condensation alarm information is generated, the preset condensation alarm information is broadcast through the target sound device. The target sound device can be a buzzer of a monitoring device arranged on the vehicle. The monitoring device is directly connected to the inside of the power battery pack and can broadcast without starting the target vehicle. After hearing the broadcast preset condensation alarm information, the user of the target vehicle adjusts the current state of the target vehicle to the started state within the preset time through the starting device, and then continues to execute the step of drying the hot and humid air entering the power battery pack through the target drying device in the turned-on state.

[0089] This embodiment determines whether the current humidity difference is greater than a preset humidity threshold when the current relative air pressure difference is greater than the preset pressure threshold; obtains the current state of the target drying device when the current humidity difference is greater than the preset humidity threshold; sets the current state of the target drying device to an open state through a first start instruction when the current state is an off state; dries the hot and humid air entering the power battery pack through the on-state target drying device to avoid damage to the power battery pack; through the above-mentioned manner, when it is determined that the current relative air pressure difference is greater than the preset pressure threshold and the current humidity difference is greater than the preset humidity threshold, obtains the current state of the target drying device, and then determines whether the current state is an off state, and if so, sets the current state to an open state through the first start instruction, and then dries the hot and humid air entering the power battery pack through the target drying device, thereby avoiding damage to the power battery pack by the hot and humid air.

[0090] In addition, an embodiment of the present invention further proposes a storage medium, on which is stored a control program for avoiding damage to a power battery pack. When the control program for avoiding damage to a power battery pack is executed by a processor, the steps of the control method for avoiding damage to a power battery pack as described above are implemented.

[0091] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0092] In addition, refer to Figure 5 The embodiment of the present invention further provides a control device for preventing damage to a power battery pack, the control device for preventing damage to a power battery pack comprising:

[0093] The acquisition module 10 is used to acquire the current pressure of the external environment and the current relative humidity of the atmosphere, and to acquire the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying.

[0094] The calculation module 20 is used to calculate the current relative air pressure difference according to the current pressure and the outlet pressure, and to calculate the current humidity difference according to the current atmospheric relative humidity and the gas relative humidity.

[0095] The drying module 30 is used to dry the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack.

[0096] This embodiment obtains the current pressure and current relative humidity of the external environment, as well as the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying; calculates the current relative air pressure difference according to the current pressure and the outlet pressure, and calculates the current humidity difference according to the current relative air humidity and the relative humidity of the gas; dries the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack; through the above method, when the air pressure conditions and condensation humidity are met, the hot and humid air that is about to enter the power battery pack is dried by the target drying device, so as to effectively prevent the power battery pack from being damaged by temperature and humidity.

[0097] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0098] In addition, for technical details not fully described in this embodiment, reference may be made to the control method for preventing power battery pack damage provided in any embodiment of the present invention, and will not be repeated here.

[0099] In one embodiment, the drying module 30 is further used to determine whether the current humidity difference is greater than a preset humidity threshold when the current relative air pressure difference is greater than a preset pressure threshold; to obtain a current state of a target drying device when the current humidity difference is greater than the preset humidity threshold; to set the current state of the target drying device to an open state through a first start instruction when the current state is an off state; and to dry the hot and humid air entering the power battery pack through the target drying device in the open state to avoid damage to the power battery pack.

[0100] In one embodiment, the drying module 30 is further used to obtain the current temperature of the heating device in the target drying device in the turned-on state when it is detected that hot and humid air from the external environment enters the air path connected to the power battery pack; heat the heating device when the current temperature is not within a preset temperature range; monitor the temperature of the heating device in real time during the heating process; when the temperature of the heating device is within a preset temperature range, heat the hot and humid air entering the power battery pack by the heating device to obtain target hot and humid air; and dry the target hot and humid air by the silica gel desiccant in the target drying device to avoid damage to the power battery pack.

[0101] In one embodiment, the drying module 30 is further used to dry the target hot and humid air through the silica gel desiccant in the target drying device to obtain current dry air; obtain the internal pressure according to the current dry air and the outlet pressure of the explosion-proof device; calculate the relative pressure difference according to the internal pressure and the current pressure of the external environment; when the relative pressure difference is greater than a preset pressure difference threshold, obtain the current state of the current air valve; when the current state of the current air valve is a closed state, set the current state of the current air valve to an open state through a second start instruction; and discharge the current dry air through the current air valve in the open state to avoid damage to the power battery pack.

[0102] In one embodiment, the drying module 30 is further used to obtain the current state of the target vehicle and determine whether the current state of the target vehicle is a startup state; when the current state of the target vehicle is not a startup state, generate a preset condensation alarm message according to the current relative air pressure difference and the current humidity difference; broadcast the preset condensation alarm message through a target sound device, so that the user can adjust the current state of the target vehicle within a preset time through a startup device; when it is detected that the current state of the target vehicle is a startup state, continue to execute the step of drying the hot and humid air entering the power battery pack through the target drying device in the turned-on state.

[0103] In one embodiment, the drying module 30 is also used for, when the current relative air pressure difference is greater than the preset pressure threshold, determining whether the current humidity difference is greater than the preset humidity threshold, and further includes: when the current humidity difference is less than the preset humidity threshold, obtaining the current state of the target gas valve; when the current state of the target gas valve is a closed state, setting the current state of the target gas valve to an open state through a third start instruction; and sucking the hot and humid gas from the external environment into the gas path through the open target gas valve to avoid damage to the box cover that wraps the power battery pack.

[0104] In one embodiment, the drying module 30 is also used to obtain the current temperature of the power battery pack, and calculate the current temperature difference according to the current temperature and a preset temperature threshold; when the current temperature difference is greater than the preset temperature difference threshold, a heat dissipation control strategy is generated according to the current temperature difference and the thermal management device; and the circulating water pump, condenser, compressor, cooler and refrigerant expansion valve in the thermal management device are controlled according to the heat dissipation control strategy to reduce the current temperature of the power battery pack.

[0105] Other embodiments of the control device for preventing damage to the power battery pack of the present invention or implementation methods thereof may refer to the above-mentioned method embodiments, which will not be repeated here.

[0106] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0107] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, an integrated platform workstation, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0109] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A control method for preventing power battery pack damage, characterized in that: The control method for preventing power battery pack damage comprises the following steps: Obtain the current pressure of the external environment and the current relative humidity of the atmosphere, as well as the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying; Calculating a current relative air pressure difference according to the current pressure and the outlet pressure, and calculating a current humidity difference according to the current atmospheric relative humidity and the gas relative humidity; Drying the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference to avoid damage to the power battery pack; The drying the hot and humid air entering the power battery pack by a target drying device according to the current relative air pressure difference and the current humidity difference to avoid damage to the power battery pack includes: When the current relative air pressure difference is greater than a preset pressure threshold, determining whether the current humidity difference is greater than a preset humidity threshold; When the current humidity difference is greater than a preset humidity threshold, obtaining a current state of the target drying device; When the current state is the closed state, setting the current state of the target drying device to the open state through a first start instruction; When it is detected that hot and humid air from the external environment enters the air path connected to the power battery pack, obtaining the current temperature of the heating device in the target drying device in the turned-on state; When the current temperature is not within a preset temperature range, heating the heating device; Real-time monitoring of the temperature of the heating device during the heating process; When the temperature of the heating device is within a preset temperature range, the humid hot air entering the power battery pack is heated by the heating device to obtain target humid hot air; Drying the target hot and humid air by means of a silica gel desiccant in the target drying device to obtain current dry air; Obtaining the internal pressure according to the current dry air and the outlet pressure of the explosion-proof device; Calculating a relative pressure difference based on the internal pressure and the current pressure of the external environment; When the relative pressure difference is greater than a preset pressure difference threshold, obtaining a current state of the current gas valve; When the current state of the current gas valve is a closed state, setting the current state of the current gas valve to an open state through a second start instruction; The current dry air is discharged through the current air valve in the open state to avoid damage to the power battery pack.

2. The control method for preventing power battery pack damage according to claim 1, characterized in that: Before the hot and humid air entering the power battery pack is dried by the turned-on target drying device to avoid damage to the power battery pack, the method further includes: Obtaining the current state of the target vehicle, and determining whether the current state of the target vehicle is a start state; When the current state of the target vehicle is not the start state, generating preset condensation alarm information according to the current relative air pressure difference and the current humidity difference; The preset condensation alarm information is broadcasted through the target sound device, so that the user can adjust the current state of the target vehicle within the preset time by starting the device; When it is detected that the current state of the target vehicle is the start state, the step of drying the hot and humid air entering the power battery pack by the target drying device in the start state is continued.

3. The control method for preventing power battery pack damage according to claim 1, characterized in that: When the current relative air pressure difference is greater than the preset pressure threshold, after determining whether the current humidity difference is greater than the preset humidity threshold, the method further includes: When the current humidity difference is less than a preset humidity threshold, obtaining a current state of the target gas valve; When the current state of the target gas valve is a closed state, setting the current state of the target gas valve to an open state through a third start instruction; The hot and humid gas from the external environment is sucked into the gas path through the target gas valve in the open state to avoid damage to the box cover that wraps the power battery pack.

4. The control method for preventing power battery pack damage according to any one of claims 1 to 3, characterized in that: After drying the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference to avoid damage to the power battery pack, the method further includes: Acquire the current temperature of the power battery pack, and calculate the current temperature difference according to the current temperature and a preset temperature threshold; When the current temperature difference is greater than a preset temperature difference threshold, generating a heat dissipation control strategy according to the current temperature difference and the thermal management device; According to the heat dissipation control strategy, the circulating water pump, condenser, compressor, cooler and refrigerant expansion valve in the thermal management device are controlled to reduce the current temperature of the power battery pack.

5. A control device for preventing damage to a power battery pack, characterized in that: The control device for preventing the power battery pack from being damaged comprises: An acquisition module is used to acquire the current pressure of the external environment and the current relative humidity of the atmosphere, as well as the outlet pressure of the explosion-proof device and the relative humidity of the gas after drying; A calculation module, used to calculate a current relative air pressure difference according to the current pressure and the outlet pressure, and to calculate a current humidity difference according to the current atmospheric relative humidity and the gas relative humidity; a drying module, configured to dry the hot and humid air entering the power battery pack through a target drying device according to the current relative air pressure difference and the current humidity difference, so as to avoid damage to the power battery pack; The drying module is further used to determine whether the current humidity difference is greater than a preset humidity threshold when the current relative air pressure difference is greater than a preset pressure threshold; to obtain a current state of a target drying device when the current humidity difference is greater than the preset humidity threshold; to set the current state of the target drying device to an open state through a first start instruction when the current state is an off state; to obtain a current temperature of a heating device in the open state target drying device when it is detected that hot and humid air from the external environment enters the air path connected to the power battery pack; to heat the heating device when the current temperature is not within a preset temperature range; to monitor the temperature of the heating device in real time during the heating process; and to control the temperature of the heating device when the temperature of the heating device is within a preset temperature range. range, the humid and hot air entering the power battery pack is heated by the heating device to obtain target humid and hot air; the target humid and hot air is dried by the silica gel desiccant in the target drying device to obtain current dry air; the internal pressure is obtained according to the current dry air and the outlet pressure of the explosion-proof device; the relative pressure difference is calculated according to the internal pressure and the current pressure of the external environment; when the relative pressure difference is greater than the preset pressure difference threshold, the current state of the current air valve is obtained; when the current state of the current air valve is a closed state, the current state of the current air valve is set to an open state through a second start-up instruction; the current dry air is discharged through the current air valve in the open state to avoid damage to the power battery pack.

6. A control device for preventing damage to a power battery pack, characterized in that: The control device for avoiding power battery pack damage comprises: a memory, a processor, and a control program for avoiding power battery pack damage stored in the memory and executable on the processor, wherein the control program for avoiding power battery pack damage is configured to implement a control method for avoiding power battery pack damage as described in any one of claims 1 to 4.

7. A storage medium, characterized in that: The storage medium stores a control program for avoiding damage to a power battery pack. When the control program for avoiding damage to a power battery pack is executed by a processor, the control method for avoiding damage to a power battery pack according to any one of claims 1 to 4 is implemented.

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