Battery pack, water absorption module recovery control method and vehicle

Abstract

A battery pack, a water absorption module recovery control method and a vehicle relate to the field of batteries. The battery pack includes a shell, a battery module, a water absorption module, a heating module, a valve, a sensor and a controller; the vehicle includes the battery pack and a chassis, and the battery pack is connected to the chassis. The steps of the water absorption module recovery control method for the battery pack are as follows: the controller receives a signal sent by the sensor to determine the weight of the water absorption module; the controller determines that the weight is greater than or equal to a first threshold, and turns on the heating module; the controller opens the valve; the controller determines that the weight is less than or equal to a second threshold, and turns off the heating module; the controller closes the valve. The scheme of the present application makes the operation of the water absorption module of the battery pack independent of the battery module, and does not affect the operating efficiency of the battery pack, so that the water absorption module switches cyclically between the dehumidification stage and the exhaust stage, and continuously reduces the humidity in the battery pack, ultimately ensuring the safe and long-term driving of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery pack, a water absorption module recovery control method and a vehicle. Background Art

[0002] Excessive humidity in the space inside the battery pack will affect the operation of the battery pack. The prior art uses the heating module on the liquid cooling system as a dehumidification device to reduce the condensed water in the battery pack by increasing the internal temperature of the battery pack. However, the prior art uses the liquid cooling system to heat the battery pack, which will affect the use of the liquid cooling system and further affect the normal operation of the battery pack. At the same time, how to make the dehumidification device continuously dehumidify the space inside the battery pack is also a problem that needs to be solved in this field. Summary of the invention

[0003] The present application proposes a battery pack, a water absorption module recovery control method and a vehicle. The water absorption module in the battery pack operates independently, and the dehumidification process and the battery pack operation do not affect each other, and will not affect the battery pack operation efficiency. In addition, the present application uses a water absorption module recovery control method to achieve the circulation of the water absorption module to continuously reduce the humidity in the battery pack, reduce the risk of damaging the battery pack due to the generation of condensed water, and enable the vehicle using the battery pack to travel safely and permanently.

[0004] In the first aspect, an embodiment of the present application proposes a battery pack, comprising a shell, which encloses a chamber; a battery module, located in the chamber; a water absorption module, located in the chamber, for reducing the humidity of the chamber; a heating module, located in the chamber, for heating the water absorption module; a valve, arranged on the shell to connect the chamber with the outside world; a sensor, located in the chamber, for detecting the gravity and acceleration of the water absorption module, or for detecting the weight of the water absorption module; a controller, respectively electrically connected to the heating module, the sensor and the valve, for determining the weight of the water absorption module and switching the heating module according to the signal sent by the sensor, and for switching the valve.

[0005] A shell, a battery module, a water absorption module, a valve, a sensor and a controller are arranged in a battery pack, wherein the shell forms a chamber; the battery module is located in the chamber; the water absorption module is located in the chamber and is used to reduce the humidity of the chamber; the heating module is located in the chamber and is used to heat the water absorption module; the valve is arranged on the shell to connect the chamber with the outside world; the sensor is located in the chamber and is used to detect the gravity and acceleration of the water absorption module, or to detect the weight of the water absorption module; the controller is electrically connected to the heating module, the sensor and the valve respectively, and is used to determine the weight of the water absorption module and turn on and off the heating module according to the signal sent by the sensor, and is used to turn on and off the valve, so that the operation of the water absorption module and the battery module of the battery pack do not affect each other, and will not affect the operation efficiency of the battery pack, and at the same time, it creates conditions for the circulation of the water absorption module to continuously reduce the humidity in the battery pack.

[0006] In an implementation of the first aspect, the sensor includes an acceleration sensor and a force sensor, the acceleration sensor and the force sensor are both in contact with the water absorption module, the acceleration sensor is used to detect the acceleration of the water absorption module, and the force sensor is used to detect the gravity of the water absorption module. By arranging the acceleration sensor and the force sensor in the sensor, wherein the acceleration sensor and the force sensor are both in contact with the water absorption module, the acceleration sensor is used to detect the acceleration of the water absorption module, and the force sensor is used to detect the gravity of the water absorption module, the controller can determine the weight of the water absorption module according to the signal sent by the sensor, thereby creating conditions for the circulation of the water absorption module to continuously reduce the humidity in the battery pack.

[0007] In an implementation of the first aspect, a groove is provided on one side of the heating module facing the water absorption module, and the acceleration sensor and the force sensor are arranged in the groove. By providing a groove on one side of the heating module facing the water absorption module, wherein the acceleration sensor and the force sensor are arranged in the groove, the acceleration sensor and the force sensor can accurately detect the acceleration and weight of the water absorption module, thereby ensuring that the controller can accurately determine the weight of the water absorption module, thereby creating conditions for the circulation of the water absorption module to continuously reduce the humidity in the battery pack.

[0008] In an implementation of the first aspect, the battery pack further comprises a partition, the partition is fixed to the inner wall of the chamber and divides the chamber into a first chamber and a second chamber, the battery module is located in the first chamber, and the water absorption module, the heating module and the sensor are all located in the second chamber. By arranging a partition in the battery pack, wherein the partition is fixed to the inner wall of the chamber and divides the chamber into a first chamber and a second chamber, the battery module is located in the first chamber, and the water absorption module, the heating module and the sensor are all located in the second chamber, when the water absorption module is heated and exhausted, the steam in the first chamber no longer enters the second chamber, thereby facilitating the circulation of the water absorption module to continuously reduce the humidity in the battery pack.

[0009] In an implementation of the first aspect, the partition has an opening, and a motor, a rotating shaft and a baffle are arranged at the opening, the motor is connected to the rotating shaft, the baffle is rotatably connected to the rotating shaft, the controller is electrically connected to the motor and used to control the rotation of the motor, and the motor is used to control the rotation of the rotating shaft to drive the baffle to rotate, so as to open and close the baffle and the opening. By arranging a motor, a rotating shaft and a baffle at the opening of the partition, wherein the motor is connected to the rotating shaft, the baffle is rotatably connected to the rotating shaft, the controller is electrically connected to the motor and used to control the rotation of the motor, and the motor is used to control the rotation of the rotating shaft to drive the baffle to rotate, so as to open and close the baffle and the opening, when the water absorption module is heated and exhausted, the steam in the first chamber no longer enters the second chamber, and when the water absorption module finishes heating and exhausting, the steam in the first chamber continues to enter the second chamber, which is ultimately conducive to the circulation of the water absorption module to continuously reduce the humidity in the battery pack.

[0010] In an implementation of the first aspect, the valve has a built-in pressure sensor, and the pressure sensor is used to detect the pressure difference between the chamber and the outside. By arranging the pressure sensor in the valve, wherein the pressure sensor is used to detect the pressure difference between the chamber and the outside, it is beneficial for the circulation of the water absorption module to continuously reduce the humidity in the battery pack.

[0011] In the second aspect, an embodiment of the present application proposes a water absorption module recovery control method for controlling the water absorption module in the battery pack described in the first aspect to dehumidify, comprising the following steps: receiving a signal sent by the sensor; determining the weight of the water absorption module; determining that the weight is greater than or equal to a first threshold, turning on the heating module; turning on the valve; re-receiving the signal sent by the sensor; re-determining the weight of the water absorption module; determining that the weight is less than or equal to a second threshold, turning off the heating module; and closing the valve.

[0012] The dehumidification of the water absorption module in the battery pack described in the first aspect is controlled by a water absorption module recovery control method, wherein: receiving a signal sent by the sensor; determining the weight of the water absorption module; determining that the weight is greater than or equal to a first threshold, turning on the heating module; turning on the valve; re-receiving the signal sent by the sensor; re-determining the weight of the water absorption module; determining that the weight is less than or equal to a second threshold, turning off the heating module; closing the valve, so that the water absorption module cycles between the dehumidification stage and the heating and exhaust stage, and continuously reduces the humidity in the battery pack.

[0013] In an implementation of the second aspect, the step of receiving the signal sent by the sensor to determine the weight of the water absorption module includes: receiving acceleration and gravity information sent by the sensor, and calculating the weight of the water absorption module according to the acceleration and gravity information. By making the controller receive the acceleration and gravity information sent by the sensor, and calculating the weight of the water absorption module according to the acceleration and gravity information, the controller can determine the weight of the water absorption module according to the signal sent by the sensor, thereby providing a basis for determining whether to subsequently turn on or off the heating module and other components.

[0014] In an implementation of the second aspect, the step of determining that the weight is greater than or equal to a first threshold and turning on the heating module includes: determining whether the weight is greater than or equal to the first threshold, if so, turning on the heating module, if not, re-determining the weight of the water absorption module and determining whether it is greater than or equal to the first threshold, so as to form a cycle. By making the controller determine whether the weight is greater than or equal to the first threshold, if so, turning on the heating module, if not, re-determining the weight of the water absorption module and determining whether it is greater than or equal to the first threshold, the controller can accurately determine the degree of water absorption by the water absorption module, and accordingly decide whether to switch components such as the heating module to switch between the dehumidification stage and the exhaust stage, which is conducive to the water absorption module cyclically working between the dehumidification stage and the heating exhaust stage, and continuously reducing the humidity in the battery pack.

[0015] In an implementation of the second aspect, the step of determining that the weight is less than or equal to the second threshold and shutting down the heating module includes: determining whether the weight is less than or equal to the second threshold, shutting down the heating module if so, and re-determining the weight of the water absorption module and determining whether it is less than or equal to the second threshold if not, so as to form a cycle. By making the controller determine whether the weight is less than or equal to the second threshold, shutting down the heating module if so, and re-determining the weight of the water absorption module and determining whether it is less than or equal to the second threshold if not, the controller can accurately determine the degree of water absorption by the water absorption module, and accordingly decide whether to switch components such as the heating module to switch between the dehumidification stage and the exhaust stage, which is conducive to the water absorption module to cycle between the dehumidification stage and the heating exhaust stage, and continuously reduce the humidity in the battery pack.

[0016] In an implementation of the second aspect, the step of opening the valve includes: receiving a signal sent by the valve to determine whether the air pressure in the chamber is equal to that in the outside, and if not, opening the valve, and if so, closing the valve. By making the controller receive a signal sent by the valve to determine whether the air pressure in the chamber is equal to that in the outside, and if not, opening the valve, and if so, closing the valve, the valve can be opened or closed accurately, which is beneficial for the water absorption module to cycle between the dehumidification stage and the heating and exhaust stage, and continuously reduce the humidity in the battery pack.

[0017] In a third aspect, the present application proposes a vehicle, comprising a chassis and a battery pack as proposed in the first aspect, wherein the battery pack is connected to the chassis. By arranging the chassis and the battery pack in the vehicle, wherein the battery pack is connected to the chassis, the battery pack can cyclically and continuously supply power to the vehicle, and ultimately can ensure safe and long-lasting driving of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0020] Figure 3 yes Figure 1 Another structural schematic diagram of the battery pack;

[0021] Figure 4 is a schematic structural diagram of a battery pack according to another embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 1 ;

[0023] Figure 6This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 2 ;

[0024] Figure 7 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 3 ;

[0025] Figure 8 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 4 ;

[0026] Fig. 9 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 5 ;

[0027] Fig.10 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 6 ;

[0028] Fig.11 yes Figure 1 The dehumidification working principle diagram of the battery pack;

[0029] Fig.12 yes Figure 1 The heating exhaust working principle diagram of the battery pack;

[0030] Fig.13 It is a schematic diagram of the structure of a battery pack according to an embodiment of the present application applied to a vehicle.

[0031] Reference numerals

[0032] 1-battery pack; 2-water absorption module; 3-sensor; 31-acceleration sensor; 32-force sensor; 4-controller; 5-valve; 6-battery module; 7-shell; 8-partition; 81-opening; 82-baffle; 83-motor; 84-shaft; 9-heating module; 91-groove; 10-chamber; 101-first chamber; 102-second chamber; 20-vehicle; 201-chassis. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0034] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of the present application are explained and described below.

[0035] A sensor is a detection device that can sense the information being measured and convert the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.

[0036] An accelerometer is a sensor that can measure acceleration. It is usually composed of a mass block, a damper, an elastic element, a sensitive element, and an adaptive circuit. During the acceleration process, the sensor measures the inertial force exerted on the mass block and uses Newton's second law to obtain the acceleration value. Depending on the different sensitive elements of the sensor, common accelerometers include capacitive, inductive, strain gauge, piezoresistive, and piezoelectric.

[0037] Force sensor is a device that converts the magnitude of force into a related electrical signal. Force sensors can detect mechanical quantities such as tension, pulling force, pressure, weight, torque, internal stress and strain.

[0038] Among them, the directional terms mentioned in the embodiments of the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", etc., are only reference directions of the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0039] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0041] It should be understood that the term "and / or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] Nowadays, battery packs are widely used as one of the power sources in vehicles. However, the battery pack will continue to generate heat during operation. When the hot air encounters the condensation surface of the liquid cooling system in the battery pack, condensed water will form. The condensed water will damage the battery modules in the battery pack. The prior art uses the heating module on the liquid cooling system as a dehumidification device to increase the temperature inside the battery pack to reduce the condensed water in the battery pack. However, the use of the liquid cooling system to heat the battery pack in the prior art will affect the use of the liquid cooling system, which in turn will affect the normal operation of the battery pack. At the same time, how to make the dehumidification device sustainably dehumidify the space inside the battery pack is also a problem that needs to be solved urgently.

[0043] In order to solve the above problems, the present application provides a specific implementation of a battery pack 1, see Figure 1 , Figure 2 and Figure 3 As shown. Among them, Figure 1 is a schematic diagram of the structure of the battery pack 1 according to an embodiment of the present application, Figure 2 yes Figure 1 The local enlarged structural diagram at A in the middle, Figure 3 yes Figure 1 Another structural schematic diagram of the battery pack 1.

[0044] Combination Figure 1 , Figure 2 as well as Figure 3 As shown, the battery pack 1 may include a water absorption module 2, a sensor 3, a controller 4, a valve 5, a battery module 6, a shell 7 and a heating module 9.

[0045] The shell 7 can enclose a chamber 10 , and the shell 7 can isolate the water absorption module 2 , the sensor 3 , the battery module 6 and the heating module 9 in the battery pack 1 from the outside world, and the outside world can refer to any object or environment outside the battery pack 1 .

[0046] The water absorption module 2 can be used to reduce the humidity of the chamber 10. Schematically, the water absorption module 2 can reduce the humidity of the chamber 10 by absorbing the moisture in the chamber 10. Schematically, the water absorption module 2 can be a desiccant such as calcium chloride, silica gel and montmorillonite. The water absorption module 2 can absorb a certain amount of moisture. When the water content of the water absorption module 2 reaches the limit, that is, saturation, the water absorption module 2 can stop working, that is, stop absorbing moisture.

[0047] The heating module 9 can be used to heat the water absorption module 2. In order to make the water absorption module 2 saturated with water content available for use again, the heating module 9 can heat the water absorption module 2, and then the water in the water absorption module 2 can be evaporated into steam, and the steam can flow out of the chamber 10 to the outside through the valve 5, so that the water absorption module 2 can continue to absorb water vapor, and finally the effect of continuous and cyclic use of the water absorption module 2 can be achieved.

[0048] The sensor 3 may be located in the chamber 10, and the sensor 3 may be in contact with the water absorption module 2. The sensor 3 may be used to detect the gravity and acceleration of the water absorption module 2, or may be used to detect the weight of the water absorption module 2. Schematically, the sensor 3 may be a resistance strain sensor, which may convert strain into resistance change using a resistance strain gauge, and then convert the resistance change into an electrical signal through a detection circuit, so that the weight of the object may be detected; or the sensor 3 may also be a hydraulic sensor, and when the gravity of the object is applied, the pressure of the hydraulic oil may increase, and the mass of the object may be determined by detecting the increase in pressure.

[0049] The controller 4 can be arranged inside or outside the chamber 10. The controller 4 can be electrically connected to the heating module 9, the sensor 3 and the valve 5 respectively. The controller 4 can be used to determine the weight of the water absorption module 2 and switch the heating module 9 according to the signal sent by the sensor 3. The controller 4 can also be used to switch the valve 5: the controller 4 can calculate the weight m transmitted by the sensor 3, or the acceleration a and the gravity G and obtain the weight m of the water absorption module 2, and make a judgment to decide whether to switch the heating module 9 and the valve 5.

[0050] The valve 5 can be arranged on the housing 7 to connect the chamber 10 with the outside. The valve 5 can detect the pressure difference between the chamber 10 and the outside, and can be automatically opened or closed according to the pressure difference: if the pressure difference is 0, the valve 5 can remain closed; if the pressure difference is not 0, the valve 5 can be opened to connect the chamber 10 with the outside, at which time the gas in the chamber 10 can flow with the outside gas, until the air pressure in the chamber 10 is equal to the outside air pressure, that is, when the pressure difference is 0, the valve 5 can be closed.

[0051] The above scheme can ensure that the operation of the water absorption module 2, heating module 9 and battery module 6 of the battery pack 1 do not affect each other, and the water absorption module 2 and heating module 9 will not affect the operating efficiency of the battery pack 1. At the same time, conditions can be created for the circulation of the water absorption module 2 to continuously reduce the humidity in the battery pack.

[0052] In a possible implementation, the sensor 3 may include an acceleration sensor 31 and a force sensor 32 .

[0053] The acceleration sensor 31 can be in contact with the water absorption module 2 along the gravity direction (not shown in the figure). The acceleration sensor 31 can be used to detect the acceleration a of the water absorption module 2: when the water absorption module 2 moves at the acceleration a, the acceleration sensor 31 can be subjected to an inertial force in the opposite direction of the acceleration a, and the mass block in the acceleration sensor 31 can be deformed in proportion to the acceleration a, and then the current in the acceleration sensor 31 can be changed through the piezoresistive effect, and the acceleration a can be detected by detecting the change of the current.

[0054] The force sensor 32 can be in contact with the water absorption module 2 along the gravity direction (not shown in the figure). The force sensor 32 can be used to detect the gravity G of the water absorption module 2: the measured force of the water absorption module 2 can cause the elastic body in the force sensor 32, such as a spring, a beam, a bellows, a diaphragm, etc., to produce a corresponding displacement, and then the force detection can be completed by detecting the displacement of the elastic body.

[0055] The acceleration sensor 31 and the force sensor 32 can respectively detect the acceleration a and gravity G of the water absorption module 2, and the weight m of the water absorption module 2 can be calculated using the formula of Newton's second law G=m*a. Therefore, the sensor 3 of the embodiment of the present application can detect the weight m of the water absorption module 2 through the acceleration sensor 31 and the force sensor 32.

[0056] In a possible implementation, the water absorption module 2 may be in contact with the heating module 9. Figure 2 and Figure 3 As shown, the heating module 9 may be provided with a groove 91, and there may be multiple grooves 91. The groove 91 may be used to load the acceleration sensor 31 and the force sensor 32, that is, the acceleration sensor 31 and the force sensor 32 may be arranged in the groove 91, and the acceleration sensor 31 and the force sensor 32 may both contact the water absorption module 2.

[0057] In a possible implementation, the water absorption module 2 may not be in contact with the heating module 9, that is, there may be a gap between the water absorption module 2 and the heating module 9, wherein the gap can ensure that the heat of the heating module 9 can act on the water absorption module 2, and the water absorption module 2 can still work normally. It should be noted that the water absorption module 2 can be placed at any position in the battery pack 1. Figure 1 , Figure 2 and Figure 3 This is only an example of the three-dimensional arrangement of the battery pack 1 proposed in the embodiment of the present application. For those skilled in the art of battery packs, the details and layout of the dehumidification system can be easily adjusted according to actual conditions.

[0058] In a possible implementation, the battery pack 1 described in this embodiment further includes a partition 8, which can be fixed to the inner wall of the chamber 10 and divide the chamber 10 into a first chamber 101 and a second chamber 102. Figure 1 , Figure 2 and Figure 3 As shown, there may be multiple partitions 8, and the multiple partitions 8 may be surrounded by the housing 7 to form the second chamber 102. The battery module 6 may be located in the first chamber 101, and the water absorption module 2 and the sensor 3 may be located in the second chamber 102.

[0059] In a possible implementation, the battery pack 1 may not have a partition 8 . Figure 4is a schematic diagram of the structure of a battery pack 1 according to another embodiment of the present application. Figure 4 , the battery pack 1 may have only one chamber 10, and the water absorption module 2, the sensor, the valve 5, the battery module 6 and the heating module 9 may all be located in the chamber 10. In this embodiment, the water absorption module 2 may be close to the valve 5, and the battery module 6 may be arranged on the side close to the water absorption module 2 away from the valve 5. When the outside air pressure is greater than the air pressure in the chamber 10, the valve 5 may be opened so that the outside air can flow into the battery pack 1. When the gas enters the chamber 10, the water absorption module 2 may absorb the moisture entrained by the gas, thereby reducing the humidity of the gas and reducing the influence of the gas on the battery module 6.

[0060] In a possible embodiment, an opening 81 may be provided on the partition 8 facing the battery module 6, and a baffle 82, a motor 83 and a rotating shaft 84 may be provided at the opening 81, the motor 83 may be connected to the rotating shaft 84, and the baffle 82 may be rotatably connected to the rotating shaft 84. The baffle 82 may close the second chamber 102 during the stage when the heating module 9 heats and restores the water absorption module 2, thereby preventing the water vapor in the first chamber 101 from continuing to flow into the second chamber 102. The controller 4 may be electrically connected to the motor 83, and the controller 4 may control the baffle 82 to separate and close from the opening 81 by controlling the motor 83. When the baffle 82 is separated from the opening 81, the first chamber 101 and the second chamber 102 may be connected, and when the baffle 82 is closed to the opening 81, the first chamber 101 and the second chamber 102 may not be connected.

[0061] In a possible implementation, the valve 5 may have a built-in pressure sensor, which may be used to detect the pressure difference between the chamber 10 and the outside world, and the pressure difference may be used to determine whether the valve 5 is switched. When the pressure difference is 0, that is, the air pressure in the chamber 10 is equal to the air pressure in the outside world, the valve 5 may remain closed. When the pressure difference is 0, that is, the air pressure in the chamber 10 is equal to the air pressure in the outside world, the valve 5 may be opened. At this time, if the air pressure in the chamber 10 is greater than the air pressure in the outside world, the gas in the chamber 10 may flow into the outside world, and if the air pressure in the chamber 10 is less than the air pressure in the outside world, the gas in the outside world may flow into the chamber 10.

[0062] In summary, the detailed structure of the battery pack 1 of the present application may be as follows: the shell 7 may enclose a chamber 10, and the shell 7 may isolate the components such as the water absorption module 2, the sensor 3, the battery module 6, the partition 8 and the heating module 9 in the battery pack 1 from the outside world, and the outside world may refer to any object or environment outside the battery pack 1. The shell 7 may protect these components from interference from factors such as external temperature and gas. For example, when the water content in the external environment is high, the shell 7 may prevent the battery module 6 from being invaded by water, thereby reducing the risk of failure of electronic devices. The shell 7 may also cooperate with other components of the battery pack 1 to form a pressure difference between different spaces, thereby achieving the effect of controlling the opening and closing of the valve 5, and this process will be described in detail later.

[0063] The water absorption module 2 can be used to reduce the humidity of the chamber 10. Schematically, the water absorption module 2 can reduce the humidity of the chamber 10 by absorbing the moisture in the chamber 10. Schematically, the water absorption module 2 can be a desiccant such as calcium chloride, silica gel and montmorillonite. The water absorption module 2 can absorb a certain amount of moisture. When the water content of the water absorption module 2 reaches the limit, that is, saturation, the water absorption module 2 can stop working, that is, stop absorbing moisture.

[0064] The heating module 9 can be used to heat the water absorption module 2. In order to make the water absorption module 2 saturated with water content available for use again, the heating module 9 can heat the water absorption module 2, and then the water in the water absorption module 2 can be evaporated into steam, and the steam can flow out of the chamber 10 to the outside through the valve 5, so that the water absorption module 2 can continue to absorb water vapor, and finally the effect of continuous and cyclic use of the water absorption module 2 can be achieved. Figure 2 , the heating module 9 may be provided with a groove 91, and there may be multiple grooves 91. The groove 91 may be used to load the sensor 3. The sensor 3 may be located in the chamber 10, and the sensor 3 may be in contact with the water absorption module 2. The sensor 3 may be used to detect the gravity and acceleration of the water absorption module 2, or may be used to detect the weight of the water absorption module 2. Schematically, the sensor 3 may be a resistive strain sensor, which may use a resistive strain gauge to convert strain into resistance change, and then use a detection circuit to convert the resistance change into an electrical signal, thereby detecting the weight of the object; or, the sensor 3 may also be a hydraulic sensor, and when the gravity of the object to be measured is applied, the pressure of the hydraulic oil may increase, and the mass of the object to be measured may be determined by detecting the increase in pressure. Combined with Figure 2 and Figure 3 As shown, the sensor 3 in the embodiment of the present application may include an acceleration sensor 31 and a force sensor 32 .

[0065] The acceleration sensor 31 can be arranged in the groove 91 of the heating module 9. The acceleration sensor 31 can contact the water absorption module 2 along the gravity direction (not shown in the figure). The acceleration sensor 31 can be used to detect the acceleration a of the water absorption module 2: when the water absorption module 2 moves with the acceleration a, the acceleration sensor 31 can be subjected to an inertial force in the opposite direction of the acceleration a, and the mass block in the acceleration sensor 31 can be deformed in proportion to the acceleration a, and then the current in the acceleration sensor 31 can be changed through the piezoresistive effect, and the acceleration a can be detected by detecting the change of the current.

[0066] The force sensor 32 can be arranged in the groove 91 of the heating module 9. The force sensor 32 can contact the water absorption module 2 along the gravity direction (not shown in the figure). The force sensor 32 can be used to detect the gravity G of the water absorption module 2: the measured force of the water absorption module 2 can cause the elastic body in the force sensor 32, such as a spring, a beam, a bellows, a diaphragm, etc., to produce a corresponding displacement, and then the force detection can be completed by detecting the displacement of the elastic body.

[0067] The acceleration sensor 31 and the force sensor 32 can respectively detect the acceleration a and gravity G of the water absorption module 2, and the weight m of the water absorption module 2 can be calculated using the formula of Newton's second law G=m*a. Therefore, the sensor 3 of the embodiment of the present application can detect the weight m of the water absorption module 2 through the acceleration sensor 31 and the force sensor 32.

[0068] The controller 4 can be arranged inside or outside the chamber 10. The controller 4 can be electrically connected to the heating module 9, the sensor 3 and the valve 5 respectively. The controller 4 can be used to determine the weight of the water absorption module 2 and switch the heating module 9 according to the signal sent by the sensor 3. The controller 4 can also be used to switch the valve 5: when the acceleration sensor 31 and the force sensor 32 of the sensor 3 respectively detect the acceleration a and the gravity G of the water absorption module 2, the acceleration sensor 31 and the force sensor 32 can respectively transmit the relevant signals of the acceleration a and the gravity G to the controller 4, the controller 4 can calculate the acceleration a and the gravity G and obtain the weight m of the water absorption module 2, and the controller 4 can further determine whether to switch the heating module 9 and the valve 5 according to the calculated weight m.

[0069] The valve 5 can be arranged on the housing 7 to connect the chamber 10 with the outside world. The valve 5 can detect the pressure difference between the chamber 10 and the outside world, and can be automatically opened or closed according to the pressure difference: if the pressure difference is 0, the valve 5 can remain closed; if the pressure difference is not 0, the valve 5 can be opened to connect the chamber 10 with the outside world, at which time the gas in the chamber 10 can flow with the outside gas, until the air pressure in the chamber 10 is equal to the outside air pressure, that is, the pressure difference is 0, the valve 5 can be closed. Schematically, the valve 5 can also be controlled by the controller 4: when the electronic components on the valve 5 are electrically connected to the controller 4, the pressure difference signal measured by the valve 5 can be sent to the controller 4, and the controller 4 can determine whether to open and close the valve 5 based on the pressure difference signal. Since the valve 5 can be a component of the battery pack in the prior art, the water absorption module 2, sensor 3 and controller 4 in the embodiment of the present application can directly cooperate with the battery pack to form an air inlet and outlet system. All components in the embodiment of the present application can be arranged in the battery pack 1 without destroying the sealing of the battery pack in the prior art and can work normally.

[0070] The dehumidification system of the battery pack 1 of the present application is an intelligent dehumidification system. The controller 4 can receive signals from the acceleration sensor 31 and the force sensor 32, and can control the heating module 9 to restore the water absorption module 2, so that the water absorption module 2 can be recycled to avoid damage to the battery pack 1 due to condensed water that has not been removed for a long time during its life cycle.

[0071] The above introduces the detailed structure of the battery pack 1 of the present application, and the following will describe in detail a water absorption module recovery control method for the battery pack 1 of the present application.

[0072] First, two thresholds are defined, a first threshold M1 and a second threshold M2. The first threshold M1 can be the mass m of the water absorption module 2 and the mass m corresponding to the maximum amount of water that the water absorption module 2 can absorb. water The sum of the first threshold value M1 can be equal to the weight of the water absorption module 2 when it reaches the water absorption limit. water It can be calculated based on the moisture absorption rate of the water absorption module 2. For example, the water absorption module 2 can be a silica gel desiccant, and the moisture absorption rate of the silica gel desiccant can be 30%, that is, each gram of silica gel desiccant can absorb 0.3g of water, and then the value of M1 can be calculated as the mass m*(1+0.3) of the silica gel desiccant. The value of M1 can be adjusted according to the type of water absorption module 2 selected.

[0073] The second threshold value M2 may be equal to the mass m of the water absorption module 2 in terms of value. The second threshold value M2 may represent the mass of the water absorption module 2 itself, that is, the mass of the water absorption module 2 when it does not absorb any moisture.

[0074] Figure 5This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 1 . See Figure 5 , the water absorption module recovery control method may include:

[0075] Step S100: receiving a signal sent by the sensor 3;

[0076] Step S200: determining the weight m1 of the water absorption module 2;

[0077] Step S300: Determine that the weight m1 is greater than or equal to a first threshold, and turn on the heating module 9;

[0078] Step S400: Open valve 5;

[0079] Step S500: re-receiving the signal sent by sensor 3;

[0080] Step S600: re-determine the weight m2 of the water absorption module 2;

[0081] Step S700: Determine that the weight m2 is less than or equal to the second threshold, and turn off the heating module 9;

[0082] Step S800: Close valve 5.

[0083] The steps of the water absorption module recovery control method in this embodiment can be as follows: the controller 4 can receive the signal sent by the sensor 3, and the controller 4 can determine the weight m1 of the water absorption module 2 through the signal. When the controller 4 determines that the weight m1 is greater than or equal to the first threshold M1, the controller 4 can turn on the heating module 9, and the controller 4 can open the valve 5. At this time, the water on the water absorption module 2 that has reached saturation can evaporate into steam at high temperature, and the steam can flow from the chamber 10 to the outside of the chamber 10 through the valve 5. Then the controller 4 can execute step S500, that is, it can re-receive the signal sent by the sensor 3, and the controller 4 can re-determine the weight m2 of the water absorption module 2 through the signal. When the controller 4 determines that the weight m2 is less than or equal to the second threshold M2, the controller 4 can turn off the heating module 9, and the controller 4 can close the valve 5. At this time, the water absorption module 2 can continue to absorb the water vapor in the chamber 10.

[0084] In a possible implementation, the water absorption module recovery control method may be in another content form. Figure 6 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 2 . See Figure 6 , the water absorption module recovery control method may include:

[0085] Step S110: receiving acceleration a1 and gravity information G1 sent by sensor 3;

[0086] Step S210: Calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information;

[0087] Step S300: Determine that the weight m1 is greater than or equal to a first threshold, and turn on the heating module 9;

[0088] Step S400: Open valve 5;

[0089] Step S510: receiving acceleration a2 and gravity information G2 sent by sensor 3;

[0090] Step S610: Calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information;

[0091] Step S700: Determine that the weight m2 is less than or equal to the second threshold, and turn off the heating module 9;

[0092] Step S800: Close valve 5.

[0093] The steps of the water absorption module recovery control method in this embodiment can be as follows: the acceleration sensor 31 can be used to detect the acceleration a of the water absorption module 2: when the water absorption module 2 moves with the acceleration a, the acceleration sensor 31 can be subjected to an inertial force in the opposite direction of the acceleration a, and the mass block in the acceleration sensor 31 can be deformed in proportion to the acceleration a, and then the current in the acceleration sensor 31 can be changed through the piezoresistance effect, and the acceleration a can be detected by detecting the change of the current. The force sensor 32 can be used to detect the gravity G of the water absorption module 2: the measured force of the water absorption module 2 can cause the elastic body in the force sensor 32, such as a spring, a beam, a bellows, a diaphragm, etc. to produce a corresponding displacement, and then the gravity m can be detected by detecting the displacement of the elastic body. The controller 4 can receive the acceleration a1 and gravity information G1 sent by the sensor 3, and the controller 4 can calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information. When the controller 4 determines that the weight m1 is greater than or equal to the first threshold value M1, the controller 4 can turn on the heating module 9, and the controller 4 can open the valve 5. At this time, the water on the water absorption module 2 that has reached saturation can evaporate into steam at high temperature, and the steam can flow from the chamber 10 to the outside of the chamber 10, that is, the outside world, through the valve 5. Then the controller 4 can receive the acceleration a2 and gravity information G2 sent by the sensor 3, and the controller 4 can calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information. When the controller 4 determines that the weight m2 is less than or equal to the second threshold value M2, the controller 4 can turn off the heating module 9, and the controller 4 can close the valve 5. At this time, the water absorption module 2 can continue to absorb the water vapor in the chamber 10. Finally, the controller 4 can return to step S110 to continue to execute the above-mentioned water absorption module recovery control method.

[0094] In a possible implementation, the water absorption module recovery control method may be in another content form. Figure 7 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 3 . See Figure 7 , the water absorption module recovery control method may include:

[0095] Step S110: receiving acceleration a1 and gravity information G1 sent by sensor 3;

[0096] Step S210: Calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information;

[0097] Step S310: Determine whether the weight m1 is greater than or equal to the first threshold value. If the determination result is yes, execute step S320. If the determination result is no, execute step S110 again.

[0098] Step S320: Turn on the heating module 9;

[0099] Step S400: Open valve 5;

[0100] Step S510: receiving acceleration a2 and gravity information G2 sent by sensor 3;

[0101] Step S610: Calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information;

[0102] Step S700: Determine that the weight m2 is less than or equal to the second threshold, and turn off the heating module 9;

[0103] Step S800: Close valve 5.

[0104] The steps of the water absorption module recovery control method in this embodiment can be as follows: the controller 4 can receive the acceleration a1 and gravity information G1 sent by the sensor 3, and the controller 4 can calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information. The controller 4 can determine whether the weight m1 is greater than or equal to the first threshold M1. If not, it can return to execute step S110, that is, the controller 4 can wait for several seconds, such as 5 seconds, 30 seconds, 60 seconds, and re-receive the weight m1 of the water absorption module 2, and re-determine the weight m1 of the water absorption module 2 and determine whether it is greater than or equal to the first threshold M1 to form a cycle. If so, step S320 can be executed, that is, the heating module 9 can be turned on, and the controller 4 can open the valve 5. At this time, the water on the water absorption module 2 that has reached saturation can evaporate into steam at high temperature, and the steam can flow from the chamber 10 to the outside of the chamber 10 through the valve 5. Then the controller 4 can receive the acceleration a2 and gravity information G2 sent by the sensor 3, and the controller 4 can calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information. When the controller 4 determines that the weight m2 is less than or equal to the second threshold value M2, the controller 4 can turn off the heating module 9 and the valve 5, and the water absorption module 2 can continue to absorb the water vapor in the chamber 10. Finally, the controller 4 can return to step S110 to continue to execute the above water absorption module recovery control method.

[0105] In a possible implementation, the water absorption module recovery control method may be in another content form. Figure 8 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 4 . See Figure 8 , the water absorption module recovery control method may include:

[0106] Step S110: receiving acceleration a1 and gravity information G1 sent by sensor 3;

[0107] Step S210: Calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information;

[0108] Step S300: Determine that the weight m1 is greater than or equal to a first threshold, and turn on the heating module 9;

[0109] Step S400: Open valve 5;

[0110] Step S510: receiving acceleration a2 and gravity information G2 sent by sensor 3;

[0111] Step S610: Calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information;

[0112] Step S710: Determine whether the weight m2 is less than or equal to the second threshold value. If the determination result is yes, proceed to step S720. If the determination result is no, proceed to step S510 again.

[0113] Step S720: Turn off the heating module 9;

[0114] Step S800: Close valve 5.

[0115] The steps of the water absorption module recovery control method in this embodiment may be as follows: the controller 4 may receive the acceleration a1 and gravity information G1 sent by the sensor 3, and the controller 4 may calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information. The controller 4 may determine that the weight m1 is greater than or equal to the first threshold M1, and the controller 4 may turn on the heating module 9. The controller 4 may turn on the valve 5, at which time, the water on the water absorption module 2 that has reached saturation in water absorption may evaporate into steam at high temperature, and the steam may flow from the chamber 10 to the outside of the chamber 10, i.e., the outside world, through the valve 5. Subsequently, the controller 4 may receive the acceleration a2 and gravity information G2 sent by the sensor 3, and the controller 4 may calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information. The controller 4 can determine whether the weight m2 is greater than or equal to the second threshold value M2. If not, it can return to step S510, that is, the controller 4 can wait for several seconds, such as 5 seconds, 30 seconds, 60 seconds, and re-receive the weight m2 of the water absorption module 2, and re-determine the weight m2 of the water absorption module 2 and determine whether it is greater than or equal to the second threshold value M2 to form a cycle. If so, step S720 can be executed, that is, the heating module 9 can be turned off, the controller 4 can close the valve 5, and the controller 4 can close the valve 5. At this time, the water absorption module 2 can continue to absorb the water vapor in the chamber 10. Finally, the controller 4 can return to step S110 to continue to execute the above-mentioned water absorption module recovery control method.

[0116] In a possible implementation, the water absorption module recovery control method may be in another content form. Fig. 9 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 5 . See Fig. 9 , the water absorption module recovery control method may include:

[0117] Step S110: receiving acceleration a1 and gravity information G1 sent by sensor 3;

[0118] Step S210: Calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information;

[0119] Step S300: Determine that the weight m1 is greater than or equal to a first threshold, and turn on the heating module 9;

[0120] Step S410: receiving a signal sent by a pressure sensor;

[0121] Step S420: Determine whether the air pressure inside the chamber is greater than the air pressure outside the chamber. If the determination result is yes, proceed to step S400; if the determination result is no, proceed to step S800;

[0122] Step S400: Open the valve;

[0123] Step S510: receiving acceleration a2 and gravity information G2 sent by sensor 3;

[0124] Step S610: Calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information;

[0125] Step S700: Determine that the weight m2 is less than or equal to the second threshold, and turn off the heating module 9;

[0126] Step S800: Close valve 5.

[0127] The steps of the water absorption module recovery control method in this embodiment can be as follows: the controller 4 can receive the acceleration a1 and gravity information G1 sent by the sensor 3, and the controller 4 can calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information. When the controller 4 determines that the weight m1 is greater than or equal to the first threshold M1, the controller 4 can turn on the heating module 9. The controller 4 can receive the signal sent by the pressure sensor to determine whether the air pressure in the chamber 10 is greater than the air pressure outside the chamber 10. If the air pressure in the chamber 10 is greater than the air pressure outside the chamber 10, the controller 4 can execute S400, that is, the valve 5 can be opened. If the air pressure in the chamber 10 is less than or equal to the air pressure outside the chamber 10, the controller 4 can execute S800, that is, the valve 5 can be closed. If the valve 5 is opened, at this time, the water on the water absorption module 2 that has reached saturation can evaporate into steam at high temperature, and the steam can flow from the chamber 10 to the outside of the chamber 10, that is, the outside world, through the valve 5. Then the controller 4 may receive the acceleration a2 and gravity information G2 sent by the sensor 3, and the controller 4 may calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information. When the controller 4 determines that the weight m2 is less than or equal to the second threshold M2, the controller 4 may turn off the heating module 9, and at this time, the water absorption module 2 may continue to absorb the moisture in the chamber 10. Finally, the controller 4 may return to step S110 to continue to execute the above-mentioned water absorption module recovery control method.

[0128] In summary, in a possible implementation, the water absorption module recovery control method may be in the following form. Fig.10 This is a schematic diagram of the process of the water absorption module recovery control method provided in the embodiment of the present application. Figure 6 . See Fig.10 , the water absorption module recovery control method may include:

[0129] Step S110: receiving acceleration a1 and gravity information G1 sent by sensor 3;

[0130] Step S210: Calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information;

[0131] Step S310: Determine whether the weight m1 is greater than or equal to a first threshold value. If the determination result is yes, execute step S320. If the determination result is no, execute step S110 again.

[0132] Step S320: Turn on the heating module 9;

[0133] Step S400: Open valve 5;

[0134] Step S510: receiving acceleration a2 and gravity information G2 sent by sensor 3;

[0135] Step S610: Calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information;

[0136] Step S710: Determine whether the weight m2 is less than or equal to the second threshold value. If the determination result is yes, execute step S720. If the determination result is no, execute step S510 again.

[0137] Step S720: Turn off the heating module 9;

[0138] Step S800: Close valve 5.

[0139] The steps of the water absorption module recovery control method in this embodiment can be as follows: the controller 4 can receive the acceleration a1 and gravity information G1 sent by the sensor 3, and the controller 4 can calculate the weight m1 of the water absorption module 2 according to the acceleration and gravity information. The controller 4 can determine whether the weight m1 is greater than or equal to the first threshold M1. If not, it can return to execute step S110, that is, the controller 4 can wait for several seconds, such as 5 seconds, 30 seconds, 60 seconds, and re-determine the weight m1 of the water absorption module 2 and determine whether it is greater than or equal to the first threshold M1 to form a cycle. If so, step S320 can be executed, that is, the heating module 9 can be turned on. At this time, the water on the water absorption module 2 that has reached saturation can evaporate into steam at high temperature, and the steam can flow from the chamber 10 to the outside of the chamber 10 through the valve 5. Then the controller 4 can receive the acceleration a2 and gravity information G2 sent by the sensor 3, and the controller 4 can calculate the weight m2 of the water absorption module 2 according to the acceleration and gravity information. The controller 4 can determine whether the weight m2 is greater than or equal to the second threshold value M2. If not, the controller 4 can return to step S510, that is, the controller 4 can wait for several seconds, such as 5 seconds, 30 seconds, 60 seconds, and re-determine the weight m2 of the water absorption module 2 and determine whether it is greater than or equal to the second threshold value M2 to form a cycle. If so, step S720 can be executed, that is, the heating module 9 can be turned off, and the controller 4 can close the valve 5. At this time, the water absorption module 2 can continue to absorb the water vapor in the chamber 10. Finally, the controller 4 can return to step S110 to continue to execute the above-mentioned water absorption module recovery control method.

[0140] Fig.11 yes Figure 1 The dehumidification working principle diagram of battery pack 1, Fig.12 yes Figure 1 The heating exhaust working principle diagram of the battery pack 1. Fig.10 , Fig.11 and Fig.12As shown, the working process of the water absorption module 2 under the water absorption module recovery control method can be as follows: the controller 4 can control the motor 83 to rotate the shaft 84, and then the baffle 82 can be opened, and then the water absorption module 2 starts to reduce the humidity of the first chamber 101, that is, it starts to absorb the water vapor in the first chamber 101, and the acceleration sensor 31 and the force sensor 32 of the sensor 3 can respectively detect the acceleration a and gravity G of the water absorption module 2. The controller 4 can receive the relevant signals of the acceleration a and gravity G sent by the sensor 3 and can calculate and determine the current weight m1 of the water absorption module 2. Then the controller 4 can determine whether the weight m1 is greater than or equal to the first threshold M1. If m1 is less than the first threshold M1, the baffle 82 can remain in the open state, and the water absorption module 2 can continue to absorb the water vapor in the first chamber 101 until it reaches the saturated state. At the same time, the controller 4 can re-determine the weight m1 of the water absorption module 2 and can determine whether m1 is greater than or equal to the first threshold M1 to form a cycle. The above stage can be called a dehumidification stage.

[0141] If m1 is greater than or equal to the first threshold value M1, the baffle 82 can be closed to stop the water vapor in the first chamber 101 from continuing to enter the second chamber 102. At the same time, the controller 4 can turn on the heating module 9 so that the heating module 9 can heat the water absorption module 2, thereby evaporating the water in the water absorption module 2 into steam. At the same time, the controller 4 can open the valve 5 so that the steam can leave the chamber 10 from the valve 5 and enter the outside.

[0142] When the water vapor in the water absorption module 2 is heated and evaporated, the acceleration sensor 31 and the force sensor 32 of the sensor 3 can respectively detect the acceleration a and the gravity G of the water absorption module 2. The controller 4 can receive the relevant signals of the acceleration a and the gravity G sent by the sensor 3 and can calculate and determine the current weight m2 of the water absorption module 2. Then the controller 4 can determine whether the weight m2 is less than or equal to the second threshold value M2. If m2 is greater than the second threshold value M2, the baffle 82 can remain in a closed state, the heating module 9 can heat the water absorption module 2 to discharge the moisture in the water absorption module 2, the valve 5 can remain in an open state, and the steam generated by the heating can be allowed to continue to flow into the outside. At the same time, the controller 4 can re-determine the weight m2 of the water absorption module 2 and can determine whether m2 is less than or equal to the second threshold value M2 to form a cycle. The above stage can be called an exhaust stage.

[0143] If m2 is less than or equal to the second threshold value M2, that is, the moisture in the water absorption module 2 can be completely evaporated into steam, and the steam in the second chamber 102 can be completely discharged to the outside through the valve 5, then the controller 4 can close the heating module 9 and the valve 5, and can open the baffle 82 to allow the water vapor in the first chamber 101 to continue to enter the second chamber 102, so that the water vapor can continue to be absorbed by the water absorption module 2, and a new round of dehumidification and exhaust operation can be started.

[0144] The above-mentioned water absorption module recovery control method can be applied to the battery pack 1 to form a cycle. The water absorption module 2 can fully absorb the water vapor in the chamber 10 until the water content of the water absorption module 2 is saturated. After the above-mentioned exhaust stage, the water absorption module 2 can be restored to the initial state, that is, the state without any water, and then the water absorption module 2 can continue a new round of dehumidification work. The whole process can achieve the effect of green and pollution-free, resource recycling, and energy saving. Through the battery pack 1 of the present application and the water absorption module recovery control method, the condensed water generated during the operation of the battery pack 1 can be reduced, and the risk of safety accidents such as short circuit or failure of high and low voltage components such as the battery module 6 can be reduced.

[0145] The battery pack 1 and the water absorption module recovery control method can be applied to vehicles. Fig.13 It is a schematic diagram of the structure of the battery pack 1 of an embodiment of the present application applied to a vehicle 20. The vehicle 20 may include a battery pack 1 and a chassis 201. The battery pack 1 may be connected to the chassis 201. The chassis 201 may include electronic components, which may be electrically connected to the battery pack 1. The water absorption module 2 may cyclically and continuously reduce the humidity in the chamber 10 of the battery pack 1 without affecting the operating efficiency of the battery module 6, thereby reducing the risk of condensation damage to the battery pack 1, and further allowing the battery pack 1 to safely and continuously power the vehicle 20 within its product life, ultimately achieving the effect of reducing costs and avoiding safety accidents.

[0146] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: a shell, enclosing a chamber; A battery module is located in the chamber; A water absorption module, located in the chamber, and used to reduce the humidity of the chamber; A heating module is located in the chamber, and is used to heat the water absorption module; A valve, disposed on the housing to connect the chamber with the outside; A sensor, located in the chamber, for detecting the gravity and acceleration of the water absorption module, or for detecting the weight of the water absorption module; The controller is electrically connected to the heating module, the sensor and the valve respectively, and is used to determine the weight of the water absorption module and switch the heating module according to the signal sent by the sensor, and is used to switch the valve.

2. The battery pack according to claim 1, characterized in that: The sensor comprises an acceleration sensor and a force sensor, both of which are in contact with the water absorption module. The acceleration sensor is used to detect the acceleration of the water absorption module, and the force sensor is used to detect the gravity of the water absorption module.

3. The battery pack according to claim 2, characterized in that: A groove is provided on a side of the heating module facing the water absorption module, and the acceleration sensor and the force sensor are arranged in the groove.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The battery pack also includes a partition, which is fixed to the inner wall of the chamber and divides the chamber into a first chamber and a second chamber. The battery module is located in the first chamber, and the water absorption module, the heating module and the sensor are all located in the second chamber.

5. The battery pack according to claim 4, characterized in that: The partition has an opening, and a motor, a rotating shaft and a baffle are arranged at the opening. The motor is connected to the rotating shaft, and the baffle is rotatably connected to the rotating shaft. The controller is electrically connected to the motor and is used to control the rotation of the motor. The motor is used to control the rotating shaft to drive the baffle to rotate, so as to open and close the baffle and the opening.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The valve has a built-in pressure sensor, which is used to detect the pressure difference between the chamber and the outside world, and the controller is used to control the opening and closing of the valve according to the pressure difference.

7. A water absorption module recovery control method, characterized in that: Used to control the dehumidification of the water absorption module in the battery pack according to any one of claims 1 to 6, characterized in that it includes the following steps: receiving a signal sent by the sensor; Determining the weight of the water absorption module; Determining that the weight is greater than or equal to a first threshold, turning on the heating module; opening the valve; Re-receiving the signal sent by the sensor; Re-determine the weight m2 of the water absorption module 2; Determining that the weight is less than or equal to a second threshold, turning off the heating module; Close the valve.

8. The water absorption module recovery control method according to claim 7, characterized in that: The step of receiving the signal sent by the sensor and determining the weight of the water absorption module comprises: The acceleration and gravity information sent by the sensor are received, and the weight of the water absorption module is calculated according to the acceleration and the gravity information.

9. The water absorption module recovery control method according to claim 7 or 8, characterized in that: The step of determining that the weight is greater than or equal to a first threshold and turning on the heating module comprises: Determine whether the weight is greater than or equal to the first threshold, if so, turn on the heating module, if not, re-determine the weight of the water absorption module and determine whether it is greater than or equal to the first threshold, so as to form a cycle.

10. The water absorption module recovery control method according to claim 7 or 8, characterized in that: The step of determining that the weight is less than or equal to a second threshold and shutting down the heating module comprises: Determine whether the weight is less than or equal to the second threshold, if so, turn off the heating module, if not, re-determine the weight of the water absorption module and determine whether it is less than or equal to the second threshold, so as to form a cycle.

11. The water absorption module recovery control method according to claim 7, characterized in that: The step of opening the valve comprises: Receive the signal sent by the pressure sensor, determine whether the air pressure in the chamber is greater than the air pressure outside the chamber, and if so, open the valve; otherwise, close the valve.

12. A vehicle, characterized in that: It comprises a chassis and a battery pack according to any one of claims 1 to 6, wherein the battery pack is connected to the chassis.

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