Control methods, devices, equipment and storage media for preventing damage to power battery packs

Abstract

The present invention relates to the field of battery protection technology, and discloses a control method, device, equipment and storage medium for preventing power battery pack damage. The method comprises: calculating the current dew point temperature according to the current temperature, current humidity and preset parameter mapping relationship of the external environment; calculating the current relative air pressure difference according to the internal air pressure and the external air pressure of the explosion-proof device; when the current dew point temperature is greater than the preset dew point temperature threshold and the current relative air pressure value is less than the preset air pressure threshold, controlling the target air valve, dehumidification device and thermal management device according to the current state of the target vehicle; in the above manner, when the dew point temperature and air pressure conditions are met, multiple devices are controlled according to the current state of the target vehicle to avoid external humid air from entering and condensation on the surface of the power battery pack and excessive temperature of the power battery pack, so as to timely and accurately prevent the power battery pack from being damaged 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 has an abnormality, 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 temperature differences between day and night, large humidity changes, and long rainy seasons, the battery system where the power battery pack is located is prone to condensation, and the occurrence of condensation will cause various hazards to the battery system, for example, insulation short circuit and spontaneous combustion of the battery system, causing the power battery pack to be damaged. The current relevant technologies to prevent power battery packs 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 thermal insulation function of the battery system to prevent the internal environment from changing rapidly with changes in external temperature. However, the above-mentioned related technologies require the balancing valve to interact with the outside air, and cannot prevent gaseous water from entering the power battery pack, which will still cause damage to the power battery pack.

[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 for preventing power battery packs from being damaged, aiming to solve the technical problem that the prior art cannot timely and accurately prevent power battery packs from being damaged by temperature and humidity.

[0005] To achieve the above-mentioned purpose, the present invention provides a control method for preventing a power battery pack from being damaged. The target air valve is used to prevent the outside hot and humid air from entering and condensing on the surface of the power battery pack. The dehumidification device is used to condense the hot and humid air from the outside entering the air pipe into hot and humid liquid and discharge it. The thermal management device is used to reduce the temperature of the power battery pack to prevent the temperature of the power battery pack from being too high. The control method for preventing the power battery pack from being damaged comprises the following steps:

[0006] Calculate the current dew point temperature based on the current temperature, current humidity and preset parameter mapping relationship of the external environment;

[0007] Calculate the current relative air pressure difference based on the internal air pressure and external air pressure of the explosion-proof device;

[0008] When the current dew point temperature is greater than a preset dew point temperature threshold and the current relative air pressure value is less than a preset air pressure threshold, obtaining a current state of the target vehicle;

[0009] The target air valve, dehumidification device and thermal management device are controlled according to the current state of the target vehicle to prevent damage to the power battery pack.

[0010] Optionally, the current dew point temperature is calculated according to the current temperature, current humidity and preset parameter mapping relationship of the external environment, including:

[0011] Collecting the current temperature of the external environment through a temperature sensor disposed outside the target vehicle, and collecting the current humidity of the external environment through a humidity sensor disposed outside the target vehicle;

[0012] Obtaining an ambient temperature-relative humidity-dew point relationship table according to the preset parameter mapping relationship;

[0013] The current temperature and the current humidity are calculated according to the ambient temperature-relative humidity-dew point relationship table to obtain the current dew point temperature.

[0014] Optionally, after the current dew point temperature is greater than a preset dew point temperature threshold, the method further includes:

[0015] Determine whether the current relative air pressure value is greater than a preset air pressure threshold;

[0016] When the current relative air pressure value is greater than a preset air pressure threshold, obtaining a current state of the target air valve;

[0017] When the current state is a closed state, the target gas valve is set to an open state through a first gas valve control instruction.

[0018] Optionally, controlling the target air valve, the dehumidification device, and the thermal management device according to the current state of the target vehicle includes:

[0019] When the current state of the target vehicle is a stationary state, obtaining the current state of the target gas valve;

[0020] When the current state of the target gas valve is an open state, setting the target gas valve to a closed state through a second gas valve control instruction;

[0021] After the setting is completed, the current performance parameters of the power battery pack are obtained, and a target box cover repair strategy is generated according to the current performance parameters;

[0022] The box cover wrapping the power battery pack is controlled according to the target box repair strategy.

[0023] Optionally, controlling the target air valve, the dehumidification device, and the thermal management device according to the current state of the target vehicle includes:

[0024] When the current state of the target vehicle is a driving state, determining whether it is detected that external hot and humid air enters the target air path;

[0025] When it is detected that the hot and humid air outside enters the target air path, the target heating network in the dehumidification device is set to the start state through the preset heating instruction;

[0026] After the setting is completed, the external hot and humid air is condensed into a corresponding hot and humid liquid through the target cooling chamber;

[0027] The hot and humid liquid is discharged from the cavity by the preset inclination angle of the condensation pipe and the action of gravity.

[0028] Optionally, controlling the target air valve, the dehumidification device, and the thermal management device according to the current state of the target vehicle includes:

[0029] When the current state of the target vehicle is a driving state, obtaining a current temperature of the power battery pack;

[0030] When the current temperature of the power battery pack is much greater than a preset temperature threshold, generating a heat dissipation control strategy according to the current temperature of the power battery pack, the preset temperature threshold and a thermal management device;

[0031] Controlling the circulating water pump, condenser, compressor and cooler according to the heat dissipation control strategy;

[0032] After the control is completed, the refrigerant expansion valve is adjusted according to the current temperature of the power battery pack to reduce the current temperature of the power battery pack.

[0033] Optionally, after controlling the target air valve, the dehumidification device and the thermal management device according to the current state of the target vehicle, the method further includes:

[0034] Testing the power battery pack using a preset battery performance testing strategy to obtain current performance testing parameters;

[0035] Obtaining standard performance parameters of the power battery pack, comparing the current performance detection parameters with the standard performance parameters, and obtaining performance difference parameters;

[0036] When there is no temperature and humidity influence parameter in the performance difference parameters, damage prevention control is performed on power battery packs of other vehicles of the same type as the target vehicle.

[0037] In addition, to achieve the above-mentioned purpose, the present invention further proposes a control device for preventing a power battery pack from being damaged, the control device for preventing a power battery pack from being damaged comprising:

[0038] A calculation module is used to calculate the current dew point temperature according to the current temperature and humidity of the external environment and the preset parameter mapping relationship;

[0039] The calculation module is also used to calculate the current relative air pressure difference according to the internal air pressure and the external air pressure of the explosion-proof device;

[0040] A judgment module, used for obtaining the current state of the target vehicle when the current dew point temperature is greater than a preset dew point temperature threshold and the current relative air pressure value is less than a preset air pressure threshold;

[0041] The control module is used to control the target air valve, dehumidification device and thermal management device according to the current state of the target vehicle to prevent damage to the power battery pack.

[0042] In addition, to achieve the above-mentioned objectives, the present invention also proposes a control device for preventing power battery pack damage, the control device for preventing power battery pack damage comprising: a memory, a processor, and a control program for preventing power battery pack damage stored in the memory and executable on the processor, the control program for preventing power battery pack damage being configured to implement the control method for preventing power battery pack damage as described above.

[0043] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which is stored a control program for preventing power battery pack damage. When the control program for preventing power battery pack damage is executed by a processor, the control method for preventing power battery pack damage as described above is implemented.

[0044] The control method for preventing power battery pack damage proposed in the present invention calculates the current dew point temperature according to the current temperature, current humidity and preset parameter mapping relationship of the external environment; calculates the current relative air pressure difference according to the internal air pressure and the external air pressure of the explosion-proof device; when the current dew point temperature is greater than the preset dew point temperature threshold and the current relative air pressure value is less than the preset air pressure threshold, obtains the current state of the target vehicle; controls the target air valve, dehumidification device and thermal management device according to the current state of the target vehicle; through the above manner, when the dew point temperature and air pressure conditions are met, multiple devices are controlled according to the current state of the target vehicle to avoid external humid air from entering and condensation on the surface of the power battery pack and excessive temperature of the power battery pack, thereby being able to timely and accurately prevent the power battery pack from being damaged by temperature and humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1It 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;

[0046] Figure 2 A schematic flow chart of a first embodiment of a control method for preventing a power battery pack from being damaged according to the present invention;

[0047] Figure 3 It is a schematic diagram of the overall structure of an embodiment of a control method for preventing power battery pack damage according to the present invention;

[0048] Figure 4 A schematic diagram of a dehumidification device according to an embodiment of a control method for preventing a power battery pack from being damaged according to the present invention;

[0049] Figure 5 A schematic flow chart of a second embodiment of a control method for preventing a power battery pack from being damaged according to the present invention;

[0050] Figure 6 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.

[0051] 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

[0052] 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.

[0053] 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 involved in an embodiment of the present invention.

[0054] like Figure 1As shown, the control device for preventing 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 (RandomAccess Memory, RAM) memory, or 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.

[0055] Those skilled in the art will understand that Figure 1 The structure shown in 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.

[0056] 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.

[0057] exist Figure 1 In the control device for preventing 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 preventing power battery pack damage of the present invention can be arranged in the control device for preventing power battery pack damage, and the control device for preventing power battery pack damage calls the control program for preventing power battery pack damage stored in the memory 1005 through the processor 1001, and executes the control method for preventing power battery pack damage provided in the embodiment of the present invention.

[0058] Based on the above hardware structure, an embodiment of a control method for preventing a power battery pack from being damaged is proposed in the present invention.

[0059] Reference Figure 2 , Figure 2 This is a flow chart of a first embodiment of a control method for preventing a power battery pack from being damaged according to the present invention.

[0060] In a first embodiment, the control method for preventing the power battery pack from being damaged comprises the following steps:

[0061] Step S10, calculating the current dew point temperature according to the current temperature and humidity of the external environment and a preset parameter mapping relationship.

[0062] 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.

[0063] It should be understood that the current temperature refers to the temperature of the external environment where the target vehicle is located, and the current temperature can be collected by a temperature sensor. Similarly, the current humidity refers to the air humidity of the external environment where the target vehicle is located, and the current humidity can be collected by a humidity sensor. The preset parameter mapping relationship refers to the mapping relationship between temperature, humidity and dew point.

[0064] Further, step S10 includes: collecting the current temperature of the external environment through a temperature sensor arranged outside the target vehicle, and collecting the current humidity of the external environment through a humidity sensor arranged outside the target vehicle; obtaining an ambient temperature-relative humidity-dew point relationship table according to the preset parameter mapping relationship; calculating the current temperature and the current humidity according to the ambient temperature-relative humidity-dew point relationship table to obtain the current dew point temperature.

[0065] It can be understood that after obtaining the current temperature and current humidity of the external environment, the current dew point temperature is calculated through the ambient temperature-relative humidity-dew point relationship table. Specifically, it can be inferred through the ambient temperature-relative humidity-dew point relationship table that when the current relative humidity is 95%, condensation will occur if the current temperature drops by 1-2°C; when the current relative humidity is 80%, condensation will occur if the current temperature drops by 4-5°C; when the current relative humidity is 50%, condensation will occur if the current temperature drops by more than 10°C.

[0066] Step S20, calculating the current relative air pressure difference according to the internal air pressure and the external air pressure of the explosion-proof device.

[0067] It can be understood that the explosion-proof device refers to a device that relieves pressure on explosive pipes to prevent explosions. The explosion-proof device can be a balanced explosion-proof valve. The internal air pressure refers to the internal air pressure when the explosion-proof device is connected to the power battery pack system. The external air pressure refers to the external air pressure when the explosion-proof device is connected to the outside world. The current relative air pressure difference is then calculated based on the internal air pressure and external air pressure of the explosion-proof device. For example, if the internal air pressure is A Pa and the external air pressure is B Pa, the current relative air pressure difference is (AB) Pa.

[0068] Step S30, when the current dew point temperature is greater than a preset dew point temperature threshold and the current relative air pressure value is less than a preset air pressure threshold, obtaining the current state of the target vehicle.

[0069] It should be understood that the current state of the target vehicle includes a stationary state and a driving state. After obtaining the current dew point temperature and the current relative air pressure value, it is necessary to determine whether the conditions that the current dew point temperature is greater than the preset dew point temperature threshold and the current relative air pressure value is less than the preset air pressure threshold are met. If so, it is necessary to protect the power battery pack according to the current state of the target vehicle. The preset air pressure threshold is 0 Pa.

[0070] Furthermore, after the current dew point temperature is greater than the preset dew point temperature threshold, it also includes: determining whether the current relative air pressure value is greater than the preset air pressure threshold; when the current relative air pressure value is greater than the preset air pressure threshold, obtaining the current state of the target gas valve; when the current state is a closed state, setting the target gas valve to an open state through a first gas valve control instruction.

[0071] It can be understood that when the current dew point temperature is greater than the preset dew point temperature threshold, but the current relative air pressure value is greater than the preset air pressure threshold, it indicates that the hot and humid air from the external environment will not enter the power battery pack through the target air valve. However, in order to prevent the internal air pressure from being too high and damaging the pipeline, the target air valve is set to the open state through the first air valve control instruction at this time, so that the internal gas is discharged to the outside.

[0072] Step S40, controlling the target air valve, the dehumidification device and the thermal management device according to the current state of the target vehicle to prevent damage to the power battery pack.

[0073] It can be understood that by controlling the target air valve, the outside humid and hot air will not enter and condense on the surface of the power battery pack. By controlling the dehumidification device, the outside humid and hot air entering the air pipe will be converted into condensed humid and hot liquid and discharged after the cavity is cooled. By controlling the thermal management device to reduce the temperature of the power battery pack, the power battery pack can be prevented from being overheated, which will cause damage to the internal structure and degradation of performance.

[0074] Further, step S40 includes: when the current state of the target vehicle is a stationary state, obtaining the current state of the target gas valve; when the current state of the target gas valve is an open state, setting the target gas valve to a closed state through a second gas valve control instruction; after the setting is completed, obtaining the current performance parameters of the power battery pack, and generating a target box cover repair strategy based on the current performance parameters; and controlling the box cover wrapping the power battery pack according to the target box body repair strategy.

[0075] It should be understood that when the current state of the target vehicle is a stationary state, it indicates that the target vehicle has not been started, and when the current dew point temperature is greater than the preset dew point temperature threshold and the current relative air pressure value is less than the preset air pressure threshold, it indicates that the outside hot and humid air will enter the power battery pack. At this time, the target air valve is set to a closed state through the second air valve control instruction to prevent the outside hot and humid air from entering and condensing on the surface of the power battery pack. When the current relative air pressure value is less than the preset air pressure threshold, the box cover wrapping the power battery pack will cause slight deformation and concave due to the action of air pressure, which has a smaller impact than swelling. It can be controlled by the target box cover repair strategy generated by the current performance parameters of the power battery pack to repair the slight deformation and concave, for example, by setting the opening pressure through the current performance parameters or adding protective foam to offset the impact of air pressure.

[0076] Further, step S40 includes: when the current state of the target vehicle is the driving state, determining whether it is detected that the outside humid hot air enters the target air path; when it is detected that the outside humid hot air enters the target air path, setting the target heating network in the dehumidification device to a start state through a preset heating instruction; after the setting is completed, condensing the outside humid hot air into a corresponding humid hot liquid through a target cooling cavity; and discharging the humid hot liquid out of the cavity through the preset inclination angle of the condensation pipe and the action of gravity.

[0077] It can be understood that when the current state of the target vehicle is the driving state, it indicates that the target vehicle is starting. When it is detected that the outside humid hot air enters the target air path, the target heating network is set to the starting state through the preset heating instruction, so that the target heating network heats the outside humid hot air, and makes the outside humid hot air easier to condense by reducing the moisture. The target heating device can be a heating network. After heating, when the outside humid hot air passes through the standard cooling cavity, the outside humid hot air will condense into humid hot liquid after encountering cold and condense on the preset condensation pipe. The preset condensation pipe is set with a certain inclination angle, and the humid liquid is discharged from the cavity through the inclination angle and gravity, so that the outside humid hot air condenses in advance and is discharged in time.

[0078] Furthermore, step S40 includes: when the current state of the target vehicle is the driving state, obtaining the current temperature of the power battery pack; when the current temperature of the power battery pack is much greater than a preset temperature threshold, generating a heat dissipation control strategy according to the current temperature of the power battery pack, the preset temperature threshold and the thermal management device; controlling the circulating water pump, condenser, compressor and cooler according to the heat dissipation control strategy; after the control is completed, adjusting the refrigerant expansion valve according to the current temperature of the power battery pack to reduce the current temperature of the power battery pack.

[0079] It should be understood that when the current state of the target vehicle is the driving state and the current temperature of the power battery pack is much greater than the preset temperature threshold, it indicates that the high temperature will cause damage to the internal structure of the power battery pack and reduce performance. At this time, it is necessary to control the thermal management device to dissipate heat from the power battery pack. The heat dissipation control strategy refers to a control strategy for reducing the temperature of the power battery pack, specifically 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 a safe temperature range in the shortest time.

[0080] Understandably, reference Figure 3 , Figure 3 It is a schematic diagram of the overall structure, specifically: a temperature sensor and a humidity sensor are set on the outside of the target vehicle, an air pressure sensor, a target air valve, a dehumidification device, a condenser, a compressor, a balanced explosion-proof valve, a power battery pack, a circulating water pump, a condenser, a cockpit refrigeration device, and a cooler, wherein the power battery pack and the circulating water pump are connected with a water-cooling liquid circuit, the power battery pack and the cooler are connected with a water-cooling liquid circuit, the cooler and the circulating water cooling are connected with a water-cooling liquid circuit, the balanced explosion-proof valve arranged on the power battery pack is connected with the dehumidification device with an air circuit, the target air valve is connected with the dehumidification device with a condensate liquid circuit, and the one-way valve, four-way joint, condenser, compressor, cooler, and cockpit refrigeration device are all connected with a condensate liquid circuit.

[0081] It should be understood that reference Figure 4 , Figure 4 It is a schematic diagram of a dehumidification device, specifically: 1 is a balanced explosion-proof valve, 2 is a coolant pipeline, 3 is a gas condensation pipeline, 4 is a heating network, and 5 is a condensation device. Specifically, when the external humid hot air enters the target gas path under pressure, it is first heated by the heating network 4, and then the heated external humid hot air passes through the cooling cavity and condenses on the gas condensation pipeline 3 after being cooled, and finally is discharged from the cavity under the action of gravity.

[0082] This embodiment calculates the current dew point temperature according to the current temperature, current humidity and preset parameter mapping relationship of the external environment; calculates the current relative air pressure difference according to the internal air pressure and external air pressure of the explosion-proof device; obtains the current state of the target vehicle when the current dew point temperature is greater than the preset dew point temperature threshold and the current relative air pressure value is less than the preset air pressure threshold; controls the target air valve, dehumidification device and thermal management device according to the current state of the target vehicle; through the above manner, when the dew point temperature and air pressure conditions are met, multiple devices are controlled according to the current state of the target vehicle to avoid external humid air from entering and condensation on the surface of the power battery pack and excessive temperature of the power battery pack, thereby timely and accurately preventing the power battery pack from being damaged by temperature and humidity.

[0083] In one embodiment, if Figure 5 The second embodiment of the control method for preventing power battery pack damage according to the present invention is proposed based on the first embodiment. After step S40, the method further includes:

[0084] Step S501, testing the power battery pack using a preset battery performance testing strategy to obtain current performance testing parameters.

[0085] It should be understood that the preset battery performance detection strategy refers to the strategy for detecting the battery or power battery pack, and the current performance detection parameters refer to the performance parameters of the power battery pack, which include but are not limited to endurance performance, charge and discharge rate, impedance, and self-discharge rate.

[0086] Step S502 , obtaining standard performance parameters of the power battery pack, and comparing the current performance detection parameters with the standard performance parameters to obtain performance difference parameters.

[0087] It can be understood that the standard performance parameters refer to the qualified performance parameters of the power battery pack, for example, the self-discharge rate is less than 0.1%, and the performance difference parameters refer to the difference parameters between the current performance detection parameters of the power battery pack and the standard performance parameters.

[0088] Step S503: When there is no temperature and humidity influencing parameter in the performance difference parameters, damage prevention control is performed on the power battery packs of other vehicles of the same type as the target vehicle.

[0089] It should be understood that the temperature and humidity influencing parameters refer to the parameters that cause performance differences due to temperature and / or humidity factors. When the temperature and humidity influencing parameters do not exist in the performance difference parameters, it indicates that the above-mentioned control method can reduce the damage to the power battery pack caused by the temperature and humidity of the external environment. At this time, the above-mentioned control method can be used to carry out damage prevention control on the power battery packs of other vehicles of the same type as the target vehicle.

[0090] This embodiment detects the power battery pack through a preset battery performance detection strategy to obtain current performance detection parameters; obtains standard performance parameters of the power battery pack, compares the current performance detection parameters with the standard performance parameters to obtain performance difference parameters; when there are no temperature and humidity influencing parameters in the performance difference parameters, performs damage prevention control on power battery packs of other vehicles of the same type as the target vehicle; through the above method, the current performance detection parameters of the power battery pack are detected through a preset battery performance detection strategy, and then the current performance detection parameters are compared with the standard performance parameters, and then it is determined whether there are temperature and humidity influencing parameters in the compared performance difference parameters. If not, damage prevention control is performed on power battery packs of other vehicles of the same type as the target vehicle, thereby preventing damage to the power battery packs due to temperature and humidity factors.

[0091] In addition, an embodiment of the present invention further proposes a storage medium, on which is stored a control program for preventing power battery pack damage. When the control program for preventing power battery pack damage is executed by a processor, the steps of the control method for preventing power battery pack damage as described above are implemented.

[0092] 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.

[0093] In addition, refer to Figure 6 The embodiment of the present invention further provides a control device for preventing a power battery pack from being damaged. The control device for preventing a power battery pack from being damaged comprises:

[0094] The calculation module 10 is used to calculate the current dew point temperature according to the current temperature and humidity of the external environment and a preset parameter mapping relationship.

[0095] The calculation module 10 is also used to calculate the current relative air pressure difference according to the internal air pressure and the external air pressure of the explosion-proof device.

[0096] The judgment module 20 is used to obtain the current state of the target vehicle when the current dew point temperature is greater than a preset dew point temperature threshold and the current relative air pressure value is less than a preset air pressure threshold.

[0097] The control module 30 is used to control the target air valve, the dehumidification device and the thermal management device according to the current state of the target vehicle to prevent damage to the power battery pack.

[0098] This embodiment calculates the current dew point temperature according to the current temperature, current humidity and preset parameter mapping relationship of the external environment; calculates the current relative air pressure difference according to the internal air pressure and external air pressure of the explosion-proof device; obtains the current state of the target vehicle when the current dew point temperature is greater than the preset dew point temperature threshold and the current relative air pressure value is less than the preset air pressure threshold; controls the target air valve, dehumidification device and thermal management device according to the current state of the target vehicle; through the above manner, when the dew point temperature and air pressure conditions are met, multiple devices are controlled according to the current state of the target vehicle to avoid external humid air from entering and condensation on the surface of the power battery pack and excessive temperature of the power battery pack, thereby timely and accurately preventing the power battery pack from being damaged by temperature and humidity.

[0099] 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.

[0100] 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, which will not be described in detail here.

[0101] In one embodiment, the calculation module 10 is also used to collect the current temperature of the external environment through a temperature sensor arranged outside the target vehicle, and to collect the current humidity of the external environment through a humidity sensor arranged outside the target vehicle; obtain an ambient temperature-relative humidity-dew point relationship table according to the preset parameter mapping relationship; calculate the current temperature and the current humidity according to the ambient temperature-relative humidity-dew point relationship table to obtain the current dew point temperature.

[0102] In one embodiment, the judgment module 20 is also used to judge whether the current relative air pressure value is greater than the preset air pressure threshold; when the current relative air pressure value is greater than the preset air pressure threshold, the current state of the target air valve is obtained; when the current state is a closed state, the target air valve is set to an open state through a first air valve control instruction.

[0103] In one embodiment, the control module 30 is also used to obtain the current state of the target gas valve when the current state of the target vehicle is a stationary state; when the current state of the target gas valve is an open state, set the target gas valve to a closed state through a second gas valve control instruction; after the setting is completed, obtain the current performance parameters of the power battery pack, and generate a target box cover repair strategy based on the current performance parameters; and control the box cover that wraps the power battery pack according to the target box repair strategy.

[0104] In one embodiment, the control module 30 is also used to determine whether external humid hot air is detected to enter the target air path when the current state of the target vehicle is the driving state; when it is detected that the external humid hot air enters the target air path, the target heating network in the dehumidification device is set to the start state through a preset heating instruction; after the setting is completed, the external humid hot air is condensed into a corresponding humid hot liquid through the target cooling cavity; the humid hot liquid is discharged from the cavity through the preset inclination angle of the condensation pipe and the action of gravity.

[0105] In one embodiment, the control module 30 is also used to obtain the current temperature of the power battery pack when the current state of the target vehicle is the driving state; when the current temperature of the power battery pack is much greater than a preset temperature threshold, generate a heat dissipation control strategy according to the current temperature of the power battery pack, the preset temperature threshold and the thermal management device; control the circulating water pump, condenser, compressor and cooler according to the heat dissipation control strategy; after the control is completed, adjust the refrigerant expansion valve according to the current temperature of the power battery pack to reduce the current temperature of the power battery pack.

[0106] In one embodiment, the control module 30 is further used to detect the power battery pack through a preset battery performance detection strategy to obtain current performance detection parameters; obtain standard performance parameters of the power battery pack, compare the current performance detection parameters with the standard performance parameters to obtain performance difference parameters; when there are no temperature and humidity influencing parameters in the performance difference parameters, perform damage prevention control on power battery packs of other vehicles of the same type as the target vehicle.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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 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, 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 enabling 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.

[0111] 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 a power battery pack from being damaged, characterized in that: The target air valve is used to prevent the outside hot and humid air from entering and condensing on the surface of the power battery pack. The dehumidification device is used to condense the hot and humid air entering the air pipe into hot and humid liquid and discharge it. The thermal management device is used to reduce the temperature of the power battery pack to prevent the temperature of the power battery pack from being too high. The control method for preventing the power battery pack from being damaged includes the following steps: Calculate the current dew point temperature based on the current temperature, current humidity and preset parameter mapping relationship of the external environment; Calculate the current relative air pressure difference based on the internal air pressure and external air pressure of the explosion-proof device; When the current dew point temperature is greater than a preset dew point temperature threshold and the current relative air pressure difference is less than a preset air pressure threshold, obtaining a current state of the target vehicle; Controlling a target gas valve, a dehumidification device, and a thermal management device according to a current state of the target vehicle to prevent damage to a power battery pack; The current dew point temperature is calculated according to the current temperature, current humidity and preset parameter mapping relationship of the external environment, including: Collecting the current temperature of the external environment through a temperature sensor disposed outside the target vehicle, and collecting the current humidity of the external environment through a humidity sensor disposed outside the target vehicle; Obtaining an ambient temperature-relative humidity-dew point relationship table according to the preset parameter mapping relationship; Calculate the current temperature and the current humidity according to the ambient temperature-relative humidity-dew point relationship table to obtain the current dew point temperature; The controlling of the target air valve, the dehumidification device and the thermal management device according to the current state of the target vehicle includes: When the current state of the target vehicle is a stationary state, obtaining the current state of the target gas valve; When the current state of the target gas valve is an open state, setting the target gas valve to a closed state through a second gas valve control instruction; After the setting is completed, the current performance parameters of the power battery pack are obtained, and a target box cover repair strategy is generated according to the current performance parameters; The box cover wrapping the power battery pack is controlled according to the target box cover repair strategy.

2. The control method for preventing power battery pack damage according to claim 1, characterized in that: After the current dew point temperature is greater than the preset dew point temperature threshold, the method further includes: Determine whether the current relative air pressure difference is greater than a preset air pressure threshold; When the current relative air pressure difference is greater than a preset air pressure threshold, obtaining a current state of the target air valve; When the current state is a closed state, the target gas valve is set to an open state through a first gas valve control instruction.

3. The control method for preventing power battery pack damage according to claim 1, characterized in that: The controlling of the target air valve, the dehumidification device and the thermal management device according to the current state of the target vehicle includes: When the current state of the target vehicle is a driving state, determining whether it is detected that external hot and humid air enters the target air path; When it is detected that the hot and humid air outside enters the target air path, the target heating network in the dehumidification device is set to the start state through the preset heating instruction; After the setting is completed, the external hot and humid air is condensed into a corresponding hot and humid liquid through the target cooling chamber; The hot and humid liquid is discharged from the cavity by the preset inclination angle of the condensation pipe and the action of gravity.

4. The control method for preventing power battery pack damage according to claim 1, characterized in that: The controlling of the target air valve, the dehumidification device and the thermal management device according to the current state of the target vehicle includes: When the current state of the target vehicle is a driving state, obtaining a current temperature of the power battery pack; When the current temperature of the power battery pack is much greater than a preset temperature threshold, generating a heat dissipation control strategy according to the current temperature of the power battery pack, the preset temperature threshold and a thermal management device; Controlling the circulating water pump, condenser, compressor and cooler according to the heat dissipation control strategy; After the control is completed, the refrigerant expansion valve is adjusted according to the current temperature of the power battery pack to reduce the current temperature of the power battery pack.

5. The control method for preventing power battery pack damage according to any one of claims 1 to 4, characterized in that: After the target air valve, the dehumidification device and the thermal management device are controlled according to the current state of the target vehicle, the method further includes: Testing the power battery pack using a preset battery performance testing strategy to obtain current performance testing parameters; Obtaining standard performance parameters of the power battery pack, comparing the current performance detection parameters with the standard performance parameters, and obtaining performance difference parameters; When there is no temperature and humidity influence parameter in the performance difference parameters, damage prevention control is performed on power battery packs of other vehicles of the same type as the target vehicle.

6. A control device for preventing a power battery pack from being damaged, characterized in that: The control device for preventing the power battery pack from being damaged comprises: A calculation module is used to calculate the current dew point temperature according to the current temperature and humidity of the external environment and the preset parameter mapping relationship; The calculation module is also used to calculate the current relative air pressure difference according to the internal air pressure and the external air pressure of the explosion-proof device; A judgment module, used for obtaining the current state of the target vehicle when the current dew point temperature is greater than a preset dew point temperature threshold and the current relative air pressure difference is less than a preset air pressure threshold; A control module, used to control the target gas valve, the dehumidification device and the thermal management device according to the current state of the target vehicle to prevent damage to the power battery pack; The calculation module is further used to collect the current temperature of the external environment through a temperature sensor arranged outside the target vehicle, and to collect the current humidity of the external environment through a humidity sensor arranged outside the target vehicle; obtain an ambient temperature-relative humidity-dew point relationship table according to the preset parameter mapping relationship; calculate the current temperature and the current humidity according to the ambient temperature-relative humidity-dew point relationship table to obtain a current dew point temperature; The control module is also used to obtain the current state of the target gas valve when the current state of the target vehicle is a stationary state; when the current state of the target gas valve is an open state, set the target gas valve to a closed state through a second gas valve control instruction; after the setting is completed, obtain the current performance parameters of the power battery pack, and generate a target box cover repair strategy based on the current performance parameters; and control the box cover that wraps the power battery pack according to the target box cover repair strategy.

7. A control device for preventing a power battery pack from being damaged, characterized in that: The control device for preventing power battery pack damage includes: a memory, a processor, and a control program for preventing power battery pack damage stored in the memory and executable on the processor, wherein the control program for preventing power battery pack damage is configured to implement a control method for preventing power battery pack damage as described in any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium stores a control program for preventing power battery pack damage. When the control program for preventing power battery pack damage is executed by the processor, the control method for preventing power battery pack damage according to any one of claims 1 to 5 is implemented.

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