Battery device

Abstract

The application discloses a battery device. The battery device comprises a battery controller, a battery compartment, a battery, a first valve body and a second valve body. The battery device is used in a vehicle comprising an air conditioner. The battery compartment is provided with an air inlet and an air outlet. The battery controller can control the first valve body and the second valve body to be in a first state or a second state. In the first state, the air conditioner, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form a loop, without using a water cooling plate, thereby avoiding the problem of liquid leakage of the water cooling plate, and further improving the safety of the battery device. In the second state, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form another loop, without the air conditioner working, thereby reducing energy consumption. The first state and the second state correspond to different loops respectively, different temperature control effects can be achieved, and the adaptability of the battery device to various application environments can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a battery device. BACKGROUND

[0002] The battery device is a device for providing power.

[0003] A battery device includes a battery and a water-cooled plate, the water-cooled plate is in contact with the battery, and the water-cooled plate includes a conversion medium with high specific heat capacity and high heat conduction performance, so that the water-cooled plate can exchange heat with the battery, thereby achieving the effect of controlling the temperature of the battery.

[0004] However, the water-cooled plate in the above-mentioned battery device is prone to liquid leakage, thereby resulting in poor safety of the battery device. SUMMARY

[0005] The embodiments of the present application provide a battery device. The technical scheme is as follows:

[0006] A battery device is provided for use in a vehicle, the vehicle including an air conditioner, the battery device including: a battery controller, a battery compartment, a battery located inside the battery compartment, a first valve body and a second valve body;

[0007] The battery compartment is provided with an air inlet and an air outlet;

[0008] The first valve body has a first port, a second port and a third port, the second valve body has a fourth port, a fifth port and a sixth port, the first port is connected to the air outlet of the air conditioner, the second port is connected to the air inlet, the third port is connected to the sixth port, the fourth port is connected to the air outlet, and the fifth port is connected to the outside;

[0009] The battery controller is electrically connected to the first valve body and the second valve body, and is used to control the first valve body and the second valve body to be in a first state or a second state, in the first state, the first port and the second port of the first valve body are conductive, and the fifth port and the fourth port of the second valve body are conductive, in the second state, the third port and the second port of the first valve body are conductive, and the sixth port and the fourth port of the second valve body are conductive.

[0010] Optionally, the battery device further includes a first temperature sensor, a second temperature sensor, a third temperature sensor and a first fan, the first temperature sensor is located at the air inlet, the second temperature sensor is located at the air outlet, the third temperature sensor is located at the battery, the second port is connected to the air inlet through a first pipeline, and the first fan is arranged in the first pipeline.

[0011] The battery controller is electrically connected with the first temperature sensor, the second temperature sensor and the third temperature sensor respectively, and is configured to control the first valve body and the second valve body to be in the second state when a temperature detection result meets a specified temperature range, the temperature detection result including a detection result of the first temperature sensor, a detection result of the second temperature sensor and a detection result of the third temperature sensor.

[0012] The battery controller is further configured to control the first valve body and the second valve body to be in a first state when the temperature detection result does not meet the specified temperature range.

[0013] Optionally, the specified temperature range is that a difference between the detection result of the first temperature sensor and the detection result of the second temperature sensor is less than or equal to 5 degrees Celsius, and a difference between the detection result of the first temperature sensor and the detection result of the third temperature sensor is less than or equal to 15 degrees Celsius.

[0014] Optionally, the battery device further comprises a second fan, the fourth port is connected with the air outlet through a second pipeline, and the second fan is arranged in the second pipeline.

[0015] Optionally, the battery device further comprises a first humidity sensor, a second humidity sensor, a first airflow sensor, a second airflow sensor and a dehumidification fan, the first humidity sensor and the first airflow sensor are located at the air inlet, the second humidity sensor and the second airflow sensor are located at the air outlet, the air outlet of the air conditioner is connected with the first port through a third pipeline, and the dehumidification fan is arranged in the third pipeline.

[0016] The battery controller is electrically connected with the first humidity sensor, the second humidity sensor, the first airflow sensor, the second airflow sensor and the dehumidification fan respectively, and is configured to control the dehumidification fan to be turned on when a detection result of the first humidity sensor and a detection result of the second humidity sensor meet a specified humidity range, and is further configured to control a power of the dehumidification fan based on a detection result of the first airflow sensor and a detection result of the second airflow sensor.

[0017] Optionally, the battery device further comprises a filter, the second port is connected with the air inlet through a first pipeline, and the filter is arranged in the first pipeline.

[0018] Optionally, the battery device further comprises a third fan, and the fifth port is communicated with the third fan.

[0019] Optionally, the battery device further comprises an air inlet pipe and an air outlet pipe inside the battery compartment, the air inlet pipe is in communication with the air inlet, the air inlet pipe is provided with a plurality of air inlet holes, the air outlet pipe is in communication with the air outlet, and the air outlet pipe is provided with a plurality of air outlet holes.

[0020] Optionally, the air inlet pipe comprises two air inlet pipes with different extension directions, the air outlet is connected with one of the air outlet pipes, and the number of the air inlet holes is greater than the number of the air outlet holes.

[0021] Optionally, the battery comprises a plurality of battery modules arranged at intervals in a first direction, and the plurality of air inlet holes are respectively directed to the gaps of the plurality of battery modules.

[0022] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0023] A battery device is provided, which comprises a battery controller, a battery compartment, a battery, a first valve body and a second valve body. The battery device is used in a vehicle, and the vehicle comprises an air conditioner. The battery compartment is provided with an air inlet and an air outlet. The battery controller can control the first valve body and the second valve body to be in a first state or a second state. In the first state, the air conditioner, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form a loop. The cold air source or the hot air source provided by the air conditioner can flow into the inside of the battery compartment from the air inlet, and the air in the inside of the battery compartment can flow out from the air outlet and be directed to the outside, so that the air conditioner can control the temperature in the inside of the battery compartment, without using a water cooling plate, thereby avoiding the problem of liquid leakage of the water cooling plate, and the safety of the battery device can be improved. In the second state, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form another loop. Without the operation of the air conditioner, the air in the battery compartment can be circulated to achieve temperature control. In this way, when the temperature of the battery is slightly high or low, the increase of energy consumption caused by frequent refrigeration or heating of the air conditioner can be avoided. The first state and the second state correspond to different loops respectively, different temperature control effects can be achieved, and the adaptability of the battery device to various application environments can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is a structural schematic view of a battery device;

[0026] Figure 2is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0027] Figure 3 is Figure 2 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0028] Figure 4 is Figure 2 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0029] Figure 5 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0030] Figure 6 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0031] Figure 7 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0032] Figure 8 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0033] Figure 9 is a structural schematic diagram of a battery device provided by an embodiment of the present application.

[0034] The above figures have shown the specific embodiments of the present application, which will be described in more detail hereinafter. These figures and the written description are not intended to limit the scope of the present application in any way, but to illustrate the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in more detail below with reference to the accompanying drawings.

[0036] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a battery device. The battery device 30 comprises a battery compartment 31, a battery 32 located inside the battery compartment 31 and a water-cooling plate 33 in contact with the battery 32. The water-cooling plate 33 comprises a conversion medium with high specific heat capacity and high heat conduction performance, so that the water-cooling plate 33 can exchange heat with the battery 32, thereby achieving the effect of controlling the temperature of the battery 32. However, the water-cooling plate 33 in the battery device 30 is prone to liquid leakage, thereby resulting in poor safety of the battery device 30.

[0037] In addition, the water-cooling plate 33 only contacts one side of the battery 32, and thus the water-cooling plate 33 can only control the temperature of one side of the battery 32. During the operation of the battery 32, the tab of the battery 32 generates the most heat, and the water-cooling plate 33 is far away from the tab of the battery 32 to improve safety, and thus the water-cooling plate 33 is difficult to dissipate heat from the tab of the battery 32. The water-cooling plate 33 also needs a water pump and a water kettle, which increases the kerb mass of the vehicle. The kerb mass refers to the mass of the vehicle equipped according to the factory technical conditions.

[0038] The embodiment of the present application provides a battery device, please refer to Figure 2 , Figure 3 and Figure 4 , Figure 2 is a battery device provided by the embodiment of the present application, Figure 3 is Figure 2 provided by the battery device of the schematic diagram of a loop, Figure 4 is Figure 2 provided by the battery device of another loop of the schematic diagram. The battery device 10 is used in a vehicle, and the vehicle includes an air conditioner 20. The battery device 10 includes a battery controller 11, a battery compartment 12, a battery 13 located in the battery compartment 12, a first valve body 14 and a second valve body 15.

[0039] The battery compartment 12 is provided with an air inlet A1 and an air outlet A2.

[0040] The first valve body 14 has a first port B1, a second port B2 and a third port B3, the second valve body 15 has a fourth port B4, a fifth port B5 and a sixth port B6, the first port B1 is connected with the air outlet of the air conditioner 20, the second port B2 is connected with the air inlet A1, the third port B3 is connected with the sixth port B6, the fourth port B4 is connected with the air outlet A2, and the fifth port B5 is connected with the outside. The outside refers to the external environment, and thus the air in the battery device 10 can be discharged to the external environment through the fifth port B5.

[0041] The battery controller 11 is electrically connected with the first valve body 14 and the second valve body 15 respectively, and is used to control the first valve body 14 and the second valve body 15 to be in a first state or a second state. In the first state, the first port B1 and the second port B2 of the first valve body 14 are conductive, and the fifth port B5 and the fourth port B4 of the second valve body 15 are conductive. In the second state, the third port B3 and the second port B2 of the first valve body 14 are conductive, and the sixth port B6 and the fourth port B4 of the second valve body are conductive.

[0042] It should be noted that, please refer to Figure 3When the battery controller 11 controls the first valve body 14 and the second valve body 15 to be in the first state, the air conditioner 20, the first valve body 14, the air inlet A1, the battery compartment 12, the air outlet A2, the second valve body 15 and the outside are sequentially connected to form a first loop. Please refer to Figure 4 When the battery controller 11 controls the first valve body 14 and the second valve body 15 to be in the second state, the first valve body 14, the air inlet A1, the battery compartment 12, the air outlet A2, the second valve body 15 and the first valve body 14 are sequentially connected to form a second loop. The first loop and the second loop can achieve different temperature control effects, and the temperature control effect can be the rate at which the temperature in the battery compartment 12 reaches the target temperature. For example, the temperature control effect can be the heating rate or the cooling rate. In addition, in order to clearly show the circulation direction (arrow direction) of the first loop and the second loop, Figure 3 and Figure 4 The specific connection mode of the first valve body 14 and the second valve body 15 and other structures is not shown, but the embodiments of the present application do not limit this.

[0043] In summary, the embodiments of the present application provide a battery device including a battery controller, a battery compartment, a battery, a first valve body and a second valve body. The battery device is used in a vehicle, and the vehicle includes an air conditioner. The battery compartment is provided with an air inlet and an air outlet. The battery controller can control the first valve body and the second valve body to be in a first state or a second state. In the first state, the air conditioner, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form a loop. The cold air source or the hot air source provided by the air conditioner can flow into the inside of the battery compartment from the air inlet, and the air in the inside of the battery compartment can flow out from the air outlet and be directed to the outside. Thus, the air conditioner can control the temperature in the inside of the battery compartment, without using a water cooling plate, avoiding the problem of liquid leakage of the water cooling plate, and thus improving the safety of the battery device. In the second state, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form another loop. Without the operation of the air conditioner, the air in the battery compartment can circulate to achieve temperature control. In this way, when the battery temperature is slightly high or low, the use of the air conditioner to frequently cool or heat can be avoided, so as to reduce energy consumption. The first state and the second state correspond to different loops, respectively, and can achieve different temperature control effects, thereby improving the adaptability of the battery device to various application environments.

[0044] Please refer to Figure 2The battery device 10 is used in a vehicle, which can be a new energy electric vehicle, and the battery device 10 can provide power for the vehicle. The vehicle includes an air conditioner 20, which can be used to realize refrigeration or heating of the vehicle cabin, and the air conditioner 20 can provide a cold air source or a hot air source for the battery device 10, so that the temperature inside the battery compartment 13 is kept within a target temperature range, which can be the optimal working temperature range of the battery 13, i.e. the temperature range in which the battery 13 works best, so as to improve the battery life. In addition, using the air conditioner 20 in the vehicle to provide a cold air source or a hot air source, it is not necessary to separately provide an air conditioning system for the battery device 10, thereby reducing the space occupied by the battery device 10 and reducing the kerb mass of the vehicle.

[0045] The battery controller 11 can be used to control the conduction state of the first valve body 14 and the second valve body 15, and can also be used to control the working state of the battery 13. For example, the battery compartment 12 can be provided with a battery management system (BMS). The battery management system is a system for monitoring and managing the battery 13. The battery management system can collect and calculate parameters such as voltage, current, temperature and state of charge to control the charging and discharging process of the battery 13. The battery controller 11 can be electrically connected with the battery management system, so as to realize the function of controlling the working state of the battery 13. In addition, the battery controller 11 can also be electrically connected with the vehicle controller, so that the vehicle controller controls the battery controller 11.

[0046] The battery compartment 12 is provided with an air inlet A1 and an air outlet A2. Since the battery 13 generates a large amount of heat during operation, the battery 13 needs to be cooled in time to avoid the high temperature inside the battery compartment 12 affecting the performance, life and safety of the battery 13. Hot air is easy to rise due to its small density, and cold air is easy to sink due to its large density. Therefore, the air inlet A1 can be arranged at a region close to the top of the battery compartment 12, and the air outlet A2 can be arranged at a region close to the bottom of the battery compartment 12. When the vehicle is placed on the ground, the top refers to the part of the battery compartment 12 away from the ground, and the bottom refers to the part of the battery compartment 12 close to the ground. In this way, the cold air source provided by the air conditioner 20 flows into the air inlet and exchanges heat with the battery 13 in a full and multi-angle manner, and the air in the battery compartment 12 after heat exchange is discharged in time through the air outlet A2, so as to form an effective convection circulation, and the temperature distribution inside the battery compartment 12 is more uniform. The positions of the air inlet A1 and the air outlet A2 can also be arranged according to the relative position of the battery 13 in the battery compartment 12, which is not limited in the present application.

[0047] In addition, the battery device provided by the related art is provided with an explosion-proof valve to prevent the internal air pressure of the battery compartment from being too high. The battery compartment 12 is provided with an air inlet A1 and an air outlet A2, and the internal air pressure of the battery compartment can be effectively prevented from being too high without the explosion-proof valve, thereby improving the safety of the battery device 10.

[0048] The battery 13 can include a plurality of battery modules, and the battery compartment 12 can further be provided with a high-voltage copper bar and a low-voltage wire harness. The high-voltage copper bar can connect the plurality of battery modules, and the low-voltage wire harness can be used to transmit detection signals and control signals for the plurality of battery modules. The battery device 10 provided by the embodiment of the present application can control the overall temperature inside the battery compartment 12, so that the battery 13, the high-voltage copper bar, the low-voltage wire harness, and the battery management system inside the battery compartment 12 can work in a suitable temperature environment, and the tab of the battery 13 can be cooled.

[0049] The first valve body 14 and the second valve body 15 have a plurality of channels, and the flow direction of the gas can be changed by changing the conduction state of the plurality of channels. For example, the first valve body 14 and the second valve body 15 can be solenoid valves, and the solenoid valves are provided with magnets. The battery controller 11 can control the state of the magnet by controlling the current to the magnet, thereby changing the conduction state of the plurality of channels.

[0050] Please refer to Figure 3 When the battery controller 11 controls the first valve body 14 and the second valve body 15 to be in the first state, the first loop is conducted, and the cold air source or the hot air source provided by the air conditioner 20 can flow into the battery compartment 12 from the air inlet A1, and the air inside the battery compartment 12 can flow out from the air outlet A2 and be directed to the outside, thereby achieving an efficient temperature control effect. Therefore, the first loop can be suitable for the case where the current temperature of the battery 13 is greatly different from the target temperature range of the battery 13. Please refer to Figure 4 When the battery controller 11 controls the first valve body 14 and the second valve body 15 to be in the second state, the second loop is conducted, and the air inside the battery compartment 12 can circulate between the air outlet A2, the second valve body 15, the first valve body 14, and the air inlet A1, and a certain temperature control effect can also be achieved. The temperature control effect of the second loop is lower than that of the first loop, and therefore the second loop can be suitable for the case where the current temperature of the battery 13 is less different from the target temperature range of the battery 13. The first loop and the second loop can achieve different temperature control effects, thereby improving the adaptability of the battery device 10 to various application environments.

[0051] Compared with Figure 1The battery device 30 provided by the related technology shown in this application embodiment has good temperature controllability and uniform temperature control, and does not require the use of a water cooling plate. This not only avoids the problem of easy leakage of water cooling plate and effectively improves the safety of battery device 10, but also saves the water pump, water tank and conversion medium that are matched with water cooling plate, thereby reducing costs and reducing the curb weight of the vehicle, and thus improving the mass energy density of battery device 10.

[0052] In one exemplary embodiment, the battery device further includes a temperature sensor, see reference... Figure 5 , Figure 5 This is a schematic diagram of another battery device provided in an embodiment of this application. The battery device 10 includes a first temperature sensor 161, a second temperature sensor 162, a third temperature sensor 163, and a first fan 171. The first temperature sensor 161 is located at the air inlet A1, the second temperature sensor 162 is located at the air outlet A2, and the third temperature sensor 163 is located at the battery 13. The second port B2 is connected to the air inlet A1 via a first pipe T1, and the first fan A1 is disposed within the first pipe T1. The first temperature sensor 161 can be used to detect the temperature of the air inlet A1, the second temperature sensor 162 can be used to detect the temperature of the air outlet A2, and the third temperature sensor 163 can be used to detect the temperature of the battery 13. The third temperature sensor 163 can be integrated into the battery management system. The first fan A1 can increase the gas flow rate. When the first circuit is open, the first fan A1 can be used to blow the cold or hot air source of the air conditioner 20 towards the air inlet A1 to improve the temperature control efficiency of the first circuit. When the second circuit is activated, the first fan A1 can be used to direct the air from the outlet A2 towards the inlet A1, thereby increasing the circulation rate of the second circuit. Additionally, Figure 4 The specific structure of the first pipe T1 is not shown, and this application embodiment does not limit it.

[0053] The battery controller 11 is electrically connected to the first temperature sensor 171, the second temperature sensor 172, and the third temperature sensor 173, respectively, allowing it to acquire temperature detection results. The battery controller 11 can control the first valve body 14 and the second valve body 15 to a second state when the temperature detection results meet a specified temperature range. The temperature detection results include the results from the first temperature sensor 171, the second temperature sensor 172, and the third temperature sensor 173. The battery controller 11 can also control the first valve body 14 and the second valve body 15 to a first state when the temperature detection results do not meet the specified temperature range. This allows for controlling the states of the first valve body 14 and the second valve body 15 based on the temperature detection results, enabling the selection of a first loop and a second loop to achieve different temperature control effects, thereby improving the controllability and flexibility of the battery 13's temperature.

[0054] The specified temperature range is also related to the difference between the detection result of the first temperature sensor 171 and the detection result of the third temperature sensor 173. The detection result of the third temperature sensor 173 can reflect the current temperature of the battery 13. When the difference between the detection result of the first temperature sensor 171 and the detection result of the third temperature sensor 173 is large, it proves that the current temperature of the battery 13 is greatly different from the temperature of the cold air source or the hot air source, and the first loop can be selected to improve the temperature control efficiency. When the difference between the detection result of the first temperature sensor 171 and the detection result of the third temperature sensor 173 is small, it proves that the current temperature of the battery 13 is not greatly different from the temperature of the cold air source or the hot air source, and the second loop can be selected to reduce energy consumption.

[0055] The specified temperature range is also related to the difference between the detection result of the first temperature sensor 171 and the detection result of the second temperature sensor 172. The detection result of the first temperature sensor 171 can reflect the temperature of the cold air source or the hot air source blown by the air conditioner 20 to the air inlet A1, and the detection result of the second temperature sensor 172 can reflect the temperature of the gas in the battery compartment 12 blown out of the air outlet A2. When the difference between the detection result of the first temperature sensor 171 and the detection result of the second temperature sensor 172 is large, it proves that the temperature in the battery compartment 12 is greatly different from the temperature of the cold air source or the hot air source, and the first loop can be selected to improve the temperature control efficiency. In addition, the too large difference can also be due to the too fast flow rate of the gas, which causes the slow heating or cooling rate of the battery compartment 12, and the power of the first fan 171 can also be controlled to reduce the flow rate of the gas. When the difference between the detection result of the first temperature sensor 171 and the detection result of the second temperature sensor 172 is small, it proves that the temperature in the battery compartment 12 is not greatly different from the temperature of the cold air source or the hot air source, and the second loop can be selected to reduce energy consumption.

[0056] Alternatively, the specified temperature range is that the difference between the detection result of the first temperature sensor and the detection result of the second temperature sensor is less than or equal to 5 degrees Celsius, and the difference between the detection result of the first temperature sensor and the detection result of the third temperature sensor is less than or equal to 15 degrees Celsius. In this way, the state of the first valve body 14 and the second valve body 15 can be controlled based on the detection results of the first temperature sensor 171, the second temperature sensor 172, and the third temperature sensor 173, so that the temperature of the battery 13 and the temperature in the battery compartment 12 can be controlled, and the temperature control efficiency can be improved.

[0057] In addition, the working load of the air conditioner 20 can be controlled based on the temperature detection result. For example, when the difference between the detection result of the first temperature sensor and the detection result of the third temperature sensor is greater than 15 degrees Celsius, the battery controller 11 controls the first valve body 14 and the second valve body 15 to be in the first state, i.e., the first loop is used, and the power of the compressor of the air conditioner 20 can be the first power PI. When the difference between the detection result of the first temperature sensor and the detection result of the third temperature sensor is greater than the critical value (15 degrees Celsius) of the target temperature range, for example, greater than 20 degrees Celsius, the power of the compressor of the air conditioner 20 can be the second power P2 (P2>P1). By increasing the power of the compressor of the air conditioner 20, the temperature control efficiency can be improved. When the difference between the detection result of the first temperature sensor and the detection result of the third temperature sensor is too small, for example, less than or equal to 15 degrees Celsius, the first loop can also be selected, and the power of the compressor of the air conditioner 20 can be the third power P3 (P3

[0058] Optionally, the battery device 10 can further include a second fan 172, and the fourth port B4 is connected to the air outlet A2 through a second pipeline T2, and the second fan 172 is arranged in the second pipeline T2. The second fan 172 can be used to improve the rate of air blowing out of the air outlet A2 in the battery compartment 12, so as to improve the circulation rate of the first loop or the second loop. Figure 4 It is shown that the battery device 10 includes the first fan 171 and the second fan 172. In addition, the battery device 10 can include only any one of the first fan 171 and the second fan 172, and the first fan 171 and the second fan 172 can both provide power for the circulation of the gas in the second loop.

[0059] In an exemplary embodiment, the battery device further includes a humidity sensor and an air flow sensor, please refer to Figure 6 , Figure 6is a structural schematic diagram of another battery device provided by an embodiment of the present application. The battery device 10 further comprises a first humidity sensor 181, a second humidity sensor 182, a first air flow sensor 191, a second air flow sensor 192, and a dehumidification fan 173. The first humidity sensor 181 and the first air flow sensor 191 are located at the air inlet A1, the second humidity sensor 182 and the second air flow sensor 192 are located at the air outlet A2, the air outlet of the air conditioner 20 is connected to the first port B1 through a third pipeline T3, and the dehumidification fan 173 is arranged in the third pipeline T3. The first humidity sensor 181 can be used to detect the humidity of the air inlet A1, the second humidity sensor 182 can be used to detect the humidity of the air outlet A2, the first air flow sensor 191 can be used to detect the air pressure and the gas flow rate of the air inlet A1, and the second air flow sensor 192 can be used to detect the air pressure and the gas flow rate of the air outlet A2. The dehumidification fan 173 can be used to control the gas flow rate and also to remove the moisture in the cold air source.

[0060] The battery controller 11 is electrically connected to the first humidity sensor 181, the second humidity sensor 182, the first air flow sensor 191, the second air flow sensor 192, and the dehumidification fan 173, respectively. The battery controller 11 is configured to control the dehumidification fan 173 to be turned on when the detection results of the first humidity sensor 181 and the second humidity sensor 182 meet a specified humidity range. The detection result of the first humidity sensor 181 can reflect the humidity of the cold air source or the hot air source provided by the air conditioner 20, and the detection result of the second humidity sensor 182 can reflect the humidity inside the battery compartment 12. The specified humidity range can be that the humidity values detected by the first humidity sensor 181 and the second humidity sensor 182 are greater than a target humidity value, and the target humidity value can be determined by the normal working humidity range of the battery 13, for example, the target humidity value can be the optimal working humidity range. In this way, the humidity of the working environment of the battery 13 can be appropriate, thereby improving the service life of the battery 13. In addition, the dehumidification fan 173 can comprise a dehumidification module, and the battery controller 11 controlling the dehumidification fan 173 to be turned on can be controlling the dehumidification module to be turned on. When the dehumidification module is turned off, the dehumidification fan 173 can still be used as a fan to control the flow rate of the cold air source or the hot air source.

[0061] The battery controller 11 can also be configured to control the power of the dehumidification fan 173 based on the detection results of the first air flow sensor 191 and the second air flow sensor 192. The detection results of the first air flow sensor 191 and the second air flow sensor 192 can reflect the air pressure and air flow rate of the air inlet A1 and the air outlet A2, respectively. For example, when the air flow rate of the air inlet A1 and the air outlet A2 is low, the battery controller 11 can be configured to control the power of the dehumidification fan 173 to increase, so as to improve the temperature control efficiency. When the air flow rate of the air inlet A1 and the air outlet A2 is high, the battery controller 11 can be configured to control the power of the dehumidification fan 173 to decrease, so as to reduce the air flow rate and avoid the situation that the air flow rate is too high and the temperature control effect is poor. In addition, the battery controller 11 can also be configured to verify whether the air pressure inside the battery compartment 12 is balanced based on the detection results of the first air flow sensor 191 and the second air flow sensor 192, so as to improve the safety of the battery device.

[0062] In addition, the first temperature sensor 171, the first humidity sensor 181, and the first air flow sensor 191 can be integrated into a first detection device and arranged at the air inlet A1, and the second temperature sensor 171, the second humidity sensor 182, and the second air flow sensor 192 can be integrated into a second detection device and arranged at the air outlet A2.

[0063] In addition, the dehumidification fan 173 can also be arranged in the first pipeline T1, so that the dehumidification fan 173 can control the air flow rate in the first loop and the second loop, and the first fan 171 or the second fan 172 does not need to be additionally arranged, so that the structure of the battery device 10 can be simplified.

[0064] Optionally, the battery device 10 further comprises a filter and a third fan, please refer to Figure 7 , Figure 7 is another structural schematic diagram of a battery device provided by the embodiments of the present application. The battery device 10 further comprises a filter 174, the second port B2 is connected to the air inlet A1 through the first pipeline T1, and the filter 174 is arranged in the first pipeline T1. The filter 174 can be used to filter impurities and prevent the impurities from entering the inside of the battery compartment 12 from the air inlet A1. The filter 174 can also be used to block the moisture that cannot be removed by the dehumidification fan 173.

[0065] Optionally, the battery device 10 further comprises a third fan 175, and the fifth port B5 is in communication with the third fan 175. The third fan 175 can be used to exhaust the air in the battery compartment 12 after heat exchange, and can improve the air flow rate in the first loop, so as to improve the temperature control efficiency.

[0066] In an exemplary embodiment, another loop can also be implemented in the battery device, please refer to Figure 8 , Figure 7is a schematic view of a loop of another battery device provided by an embodiment of the present application, Figure 8 Only the circulating direction of the third loop is shown, and the circulating directions of the first loop and the second loop can be referred to Figure 3 and Figure 4 The first valve body 14 also has a seventh port B7 which is in communication with the outside, and the battery controller 11 can also be used to control the first valve body 14 and the second valve body 15 to be in a third state, in which the seventh port B7 and the second port B2 of the first valve body 14 are in communication, and the fifth port B5 and the fourth port B4 of the second valve body 15 are in communication. The outside refers to the outside environment, and then the air in the outside environment can be introduced into the battery device 10 through the seventh port B7. When the first valve body 14 and the second valve body 15 are in the third state, the outside, the first valve body 14, the air inlet A1, the battery compartment 12, the air outlet A2, the second valve body 15 and the third fan 175 are sequentially in communication to form the third loop. When the third loop is in communication, the air in the outside can flow from the first valve body 14 to the air inlet A1, and then flow into the inside of the battery compartment 12 from the air inlet A1, and the air in the inside of the battery compartment 12 can flow out from the air outlet A2 and be guided to the outside, so that a certain temperature control effect can be achieved. Since the second loop is a closed circulation, the temperature control effect of the third loop is higher than that of the first loop, and since the first loop provides the cold air source or the hot air source for the air conditioner 20 to exchange heat with the inside of the battery compartment 12, the temperature control effect of the third loop is lower than that of the first loop. Therefore, the three loops provided by the embodiment of the present application correspond to different temperature control effects respectively, so that the adaptability of the battery device 10 to different application environments can be further improved. In addition, in order to clearly show the circulating direction (arrow direction) of the first loop and the second loop, Figure 8 The specific connection mode of the first valve body 14, the second valve body 15 and other structures is not shown, but the embodiment of the present application does not limit this.

[0067] When the temperature of the external environment is appropriate, the heat generated by the battery 13 during operation is the main factor affecting the temperature of the battery 13. For example, the temperature range corresponding to the appropriate temperature of the external environment can be the normal operating temperature range of the battery 13, i.e., the temperature range in which the battery 13 can operate normally. When the temperature detection result meets the specified temperature range, the battery controller 11 can control the first valve body 14 and the second valve body 15 to be in the third state, i.e., use the third loop for temperature control. The third loop introduces external air for heat exchange, which can improve the temperature control effect compared with the second loop. In addition, when the temperature of the external environment is too high or too low, the temperature of the external environment is the main factor affecting the temperature of the battery 13, and therefore the temperature of the introduced external air will also be too high or too low. Therefore, the first loop and the second loop can be used to control the temperature of the battery device according to the above embodiments. The first loop, the second loop, and the third loop provided in the embodiments of the present application can achieve different temperature control effects, thereby further improving the adaptability of the battery device 10 to various application environments.

[0068] In an exemplary embodiment, the battery compartment is internally provided with an air inlet duct and an air outlet duct. Please refer to Figure 8 , Figure 8 is a structural schematic diagram of part of the structure of another battery device provided in the embodiments of the present application. The battery device 10 further includes an air inlet duct C1 and an air outlet duct C2 located inside the battery compartment 12. The air inlet duct C1 is in communication with the air inlet A1, and the air inlet duct C1 has a plurality of air inlet holes C11. The air outlet duct C2 is in communication with the air outlet A2, and the air outlet duct C2 has a plurality of air outlet holes C21. The plurality of air inlet holes C11 can be uniformly distributed on the air inlet duct C1, so as to guide the gas entering from the air inlet A1 to each position of the battery compartment 12, thereby improving the uniformity of the temperature distribution in the battery compartment 12. The plurality of air outlet holes C21 can guide the air in the battery compartment 12 after heat exchange to be discharged from the air outlet A2, so as to avoid the air pressure in the battery compartment 12 being too high, thereby improving the safety of the battery device 10.

[0069] Optionally, the air inlet pipe C1 comprises two air inlet pipes C1 with different extension directions, the air outlet A2 is connected with an air outlet pipe C2, and the number of the air inlet holes C11 is greater than the number of the air outlet holes C21, so that the gas entering from the air inlet A1 can be increased to contact the battery 12, thereby improving the temperature control effect. In addition, when the vehicle is placed on the ground, the battery compartment 12 has a top portion away from the ground and a bottom portion close to the ground, and there is a cavity between the top portion of the battery compartment 12 and the battery 13. The air inlet pipe C1 can be arranged on the inner surface of the top portion of the battery compartment 12, the extension direction of the air inlet pipe C1 can be parallel to the arrangement direction of the battery module 131, and the air inlet holes C11 of the air inlet pipe C1 can be directed to the battery 13, so that the temperature control effect can also be improved. In addition, when the temperature inside the battery compartment 12 is too high, the cold air source guided by the air inlet pipe C1 has a large density and is easy to sink. By arranging the air inlet pipe C1 on the top portion of the battery compartment 12, the cold air source can be fully and multi-angelly exchanged with the battery 13, so that the temperature distribution inside the battery compartment 12 can be more uniform.

[0070] Optionally, the battery 13 comprises at least a plurality of battery modules 131 arranged at intervals along the first direction X, and the plurality of air inlet holes C11 are respectively directed to the gaps of the plurality of battery modules 131, so as to facilitate the flow of the gas entering from the air inlet A1 in the battery compartment 12, and to effectively control the temperature of the plurality of battery modules 131. In addition, the plurality of battery modules 131 provided by the embodiments of the present application can comprise a plurality of arrangement modes, for example, row-column arrangement. For the battery modules 131 in a plurality of arrangement modes, the air inlet holes C11 can be arranged at positions corresponding to the gaps of the battery modules 131, so as to improve the uniformity of the temperature in the battery compartment 12.

[0071] In addition, Figure 9 Only the case that the orthographic projection of the air inlet A1 on the bottom surface of the battery compartment 12 and the orthographic projection of the air outlet A2 on the bottom surface of the battery compartment 12 are located at two adjacent top corners is shown, but the air inlet A1 and the air outlet A2 can also be located at other positions, and the embodiments of the present application do not limit this.

[0072] In summary, the embodiment of the present application provides a battery device including a battery controller, a battery compartment, a battery, a first valve body and a second valve body. The battery device is used in a vehicle including an air conditioner. The battery compartment is provided with an air inlet and an air outlet. The battery controller can control the first valve body and the second valve body to be in a first state or a second state. In the first state, the air conditioner, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form a loop. The cold air source or the hot air source provided by the air conditioner can flow into the battery compartment from the air inlet, and the air in the battery compartment can flow out from the air outlet and be guided to the outside, so that the air conditioner can control the temperature in the battery compartment, without using a water cooling plate, avoiding the problem of liquid leakage of the water cooling plate, and thus the safety of the battery device can be improved. In the second state, the first valve body, the air inlet, the battery compartment, the air outlet and the second valve body form another loop. Without the operation of the air conditioner, the air in the battery compartment can be circulated to achieve temperature control. In this way, when the battery temperature is slightly high or low, the use of the air conditioner for frequent refrigeration or heating to increase energy consumption can be avoided. The first state and the second state correspond to different loops, which can achieve different temperature control effects, thereby improving the adaptability of the battery device to various application environments.

[0073] It should be noted that in the drawings, the dimensions of layers and regions can be exaggerated for clarity. Also, it can be understood that when a component or layer is referred to as being "on" another component or layer, it can be directly on the other component or layer, or intervening layers can also be present. In addition, it can be understood that when a component or layer is referred to as being "under" another component or layer, it can be directly under the other component or layer, or one or more intervening layers or components can also be present. In addition, it can be understood that when a layer or component is referred to as being "between" two layers or components, it can be the only layer or component between the two layers or components, or one or more intervening layers or components can also be present. Similar reference numerals can indicate similar components throughout the specification.

[0074] In the present application, the terms "first", "second", "third", "fourth", "fifth" and "sixth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0075] The above description is only optional embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device is used in a vehicle comprising an air conditioner, and comprises a battery controller, a battery compartment, a battery located inside the battery compartment, a first valve body and a second valve body; An air inlet and an air outlet are arranged on the battery compartment; The first valve body has a first port, a second port and a third port, the second valve body has a fourth port, a fifth port and a sixth port, the first port is connected with the air outlet of the air conditioner, the second port is connected with the air inlet, the third port is connected with the sixth port, the fourth port is connected with the air outlet, and the fifth port is connected with the outside; The battery controller is electrically connected with the first valve body and the second valve body respectively, and is used for controlling the first valve body and the second valve body to be in a first state or a second state, in the first state, the first port and the second port of the first valve body are in conduction, and the fifth port and the fourth port of the second valve body are in conduction, in the second state, the third port and the second port of the first valve body are in conduction, and the sixth port and the fourth port of the second valve body are in conduction; The battery device further comprises a first temperature sensor, a second temperature sensor, a third temperature sensor and a first fan, the first temperature sensor is located at the air inlet, the second temperature sensor is located at the air outlet, the third temperature sensor is located at the battery, the second port is connected with the air inlet through a first pipeline, and the first fan is arranged in the first pipeline; The battery device further comprises a first humidity sensor, a second humidity sensor, a first airflow sensor, a second airflow sensor and a dehumidification fan, the first humidity sensor and the first airflow sensor are located at the air inlet, the second humidity sensor and the second airflow sensor are located at the air outlet, the air outlet of the air conditioner is connected with the first port through a third pipeline, and the dehumidification fan is arranged in the third pipeline; The battery controller is connected with the first humidity sensor, the second humidity sensor, the first airflow sensor, the second airflow sensor and the dehumidification fan respectively, the battery controller is used for controlling the dehumidification fan to be turned on when the detection results of the first humidity sensor and the second humidity sensor meet a specified humidity range, and the battery controller is further used for controlling the power of the dehumidification fan based on the detection results of the first airflow sensor and the second airflow sensor; The battery device further comprises an air inlet pipeline and an air outlet pipeline located inside the battery compartment, the air inlet pipeline is connected with the air inlet, the air inlet pipeline is provided with a plurality of air inlet holes, the air outlet pipeline is connected with the air outlet, and the air outlet pipeline is provided with a plurality of air outlet holes.

2. The battery device of claim 1, wherein The battery controller is electrically connected with the first temperature sensor, the second temperature sensor and the third temperature sensor respectively, and is configured to control the first valve and the second valve to be in the second state when a temperature detection result meets a specified temperature range, the temperature detection result including a detection result of the first temperature sensor, a detection result of the second temperature sensor and a detection result of the third temperature sensor. The battery controller is further configured to control the first valve and the second valve to be in a first state when the temperature detection result does not meet the specified temperature range.

3. The battery device of claim 2, wherein The specified temperature range is that a difference between the detection result of the first temperature sensor and the detection result of the second temperature sensor is less than or equal to 5 degrees Celsius, and a difference between the detection result of the first temperature sensor and the detection result of the third temperature sensor is less than or equal to 15 degrees Celsius.

4. The battery device of claim 2, wherein The battery device further comprises a second fan, the fourth port is connected with the air outlet through a second pipeline, and the second fan is arranged in the second pipeline.

5. The battery device of claim 1, wherein The battery device further comprises a filter, the second port is connected with the air inlet through a first pipeline, and the filter is arranged in the first pipeline.

6. The battery device of claim 1, wherein The battery device further comprises a third fan, and the fifth port is communicated with the third fan.

7. The battery device of claim 1, wherein The air inlet pipeline comprises two air inlet pipelines with different extension directions, the air outlet is connected with one of the air outlet pipelines, and the number of the air inlet holes is greater than the number of the air outlet holes.

8. The battery device of claim 1, wherein The battery comprises a plurality of battery modules arranged at intervals along a first direction, and the plurality of air inlet holes are respectively directed to the gaps of the plurality of battery modules.

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