Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, and the battery device comprises a battery box body which is provided with a first interface and a second interface which are communicated with an internal heat exchange runner; the heat management auxiliary device is arranged on the outer side of the battery box body and detachably connected with the battery box body, the heat management auxiliary device is provided with a heat exchange medium inlet, a heat exchange medium outlet and a control valve, the control valve is switched between an opening state and a closing state so that the battery device can be switched between a first state and a second state, and in the first state, the heat exchange medium inlet is communicated with the heat exchange medium outlet; in the first state, the heat exchange medium inlet communicates with the first connector, the heat exchange medium outlet communicates with the second connector, and in the second state, the heat exchange medium inlet communicates with the second connector, and the heat exchange medium outlet communicates with the first connector. According to the technical scheme, under the condition that the positions of the heat exchange medium inlet and the heat exchange medium outlet are not changed, bidirectional flow of the heat exchange medium in the battery box body can be realized, so that the temperature of the battery box body is kept in a suitable range, and the internal structure of the battery box body does not need to be changed.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and in particular, to a battery device and an electrical device. Background Art

[0002] The performance of a battery is greatly affected by the internal temperature of the battery. Both too high and too low internal temperatures of the battery are harmful to the battery performance. In related technologies, during the process of cooling or heating the inside of the battery, the cooling or heating effects of various parts inside the battery are not balanced. In particular, the temperature difference between the components near the inlet and outlet of the heat exchange medium inside the battery is large, and the cooling or heating effect is poor, resulting in the overall temperature of the battery not being able to be maintained within a suitable range, and the battery performance is poor. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, embodiments of this application provide a battery device and an electrical device, which can realize the bidirectional flow of the heat exchange medium in the battery box. During the process of cooling or heating the inside of the battery box, the cooling or heating effects of various parts inside the battery box are more balanced, which is conducive to keeping the overall temperature of the battery box within a suitable range, and the battery performance is better.

[0004] In a first aspect, embodiments of this application provide a battery device, including: a battery box, the battery box having a first interface and a second interface communicated with an internal heat exchange flow path; a thermal management auxiliary device, the thermal management auxiliary device being disposed outside the battery box and detachably connected to the battery box, the thermal management auxiliary device having a heat exchange medium inlet and a heat exchange medium outlet, and a control valve being provided inside the thermal management auxiliary device, the control valve switching between an open state and a closed state to enable the battery device to switch between a first state and a second state. In the first state, the heat exchange medium inlet is communicated with the first interface and the heat exchange medium outlet is communicated with the second interface. In the second state, the heat exchange medium inlet is communicated with the second interface and the heat exchange medium outlet is communicated with the first interface.

[0005] In the above technical solution, the battery device is switched between the first state and the second state by the thermal management auxiliary device, so that, with the positions of the heat exchange medium inlet and the heat exchange medium outlet at the thermal management auxiliary device remaining unchanged, the connection states of the heat exchange medium inlet and the heat exchange medium outlet with the first interface and the second interface of the battery box body are exchanged respectively, realizing the bidirectional flow of the heat exchange medium in the battery box body, making the heat exchange effects near the first interface and the second interface in the battery box body better, facilitating keeping the overall temperature of the battery box body within a suitable range, making the cooling or heating effects of various parts in the battery box body more balanced, making the performance of the battery device better and the safety better, and the thermal management auxiliary device is arranged outside the battery box body, without changing the internal structure of the battery box body, facilitating keeping parameters such as the energy density of the battery box body within a suitable range.

[0006] In some embodiments, the thermal management auxiliary device includes a plurality of connecting pipes, the battery box body has at least one joint, the joint defines the first interface and / or the second interface, and a part of the plurality of connecting pipes are inserted and matched with the joint.

[0007] In the above technical solution, the detachable connection between the thermal management auxiliary device and the battery box body is realized by the insertion and matching of the connecting pipe and the joint, making the installation and disassembly operations of the thermal management auxiliary device on the battery box body more convenient, easy to assemble and disassemble, and facilitating simplifying the structure of the battery device.

[0008] In some embodiments, the thermal management auxiliary device includes a plurality of connecting pipes, the plurality of connecting pipes include a first connecting pipe, a second connecting pipe, a third connecting pipe and a fourth connecting pipe, one end of the first connecting pipe has the heat exchange medium inlet, one end of the second connecting pipe has the heat exchange medium outlet, the first connecting pipe and the second connecting pipe are connected by the third connecting pipe and the fourth connecting pipe, and a plurality of control valves are provided, and the plurality of control valves are arranged on at least a part of the plurality of connecting pipes.

[0009] In the above technical solution, a plurality of flow paths can be formed in the thermal management auxiliary device by the plurality of connecting pipes, and the switching of the heat exchange medium between the plurality of flow paths in the thermal management auxiliary device can be realized by the plurality of control valves, so as to control the flow direction of the heat exchange medium in the thermal management auxiliary device, and further enable the heat exchange medium to be selectively introduced into the battery box body from one of the first interface and the second interface, realizing the bidirectional flow of the heat exchange medium in the battery box body.

[0010] In some embodiments, there is a first communication port between the first connecting pipe and the third connecting pipe, a second communication port between the first connecting pipe and the fourth connecting pipe. The first communication port is closer to the heat exchange medium inlet than the second communication port. There is a third communication port between the second connecting pipe and the fourth connecting pipe, and a fourth communication port between the second connecting pipe and the third connecting pipe. The third communication port is closer to the heat exchange medium outlet than the fourth communication port. The plurality of control valves include a first control valve, a second control valve, and a third control valve. The first control valve is disposed on the first connecting pipe and is located between the first communication port and the second communication port. The second control valve is disposed on the third connecting pipe. The third control valve is disposed on the fourth connecting pipe. Wherein, in the first state, the first control valve is in an open state, and the second control valve and the third control valve are in a closed state. In the second state, the first control valve is in a closed state, and the second control valve and the third control valve are in an open state.

[0011] In the above technical solution, by controlling the opening and closing states of the first control valve, the second control valve, and the third control valve respectively, the flow state of the heat exchange medium in multiple flow paths of the heat management auxiliary device can be selected, making the switching of the heat exchange medium between multiple flow paths in the heat management auxiliary device more controllable, facilitating the control of the battery device to switch between the first state and the second state, so as to realize the bidirectional flow of the heat exchange medium in the battery box.

[0012] In some embodiments, the battery device further includes a fourth control valve. The fourth control valve is disposed on the second connecting pipe and is located between the third communication port and the fourth communication port. In the first state, the fourth control valve is in an open state. In the second state, the fourth control valve is in a closed state.

[0013] In the above technical solution, by controlling the opening and closing states of the fourth control valve when the battery device is in the first state and the second state, during the process when the battery device is in the second state, the heat exchange medium can flow into the battery box rather than directly flowing to the heat exchange medium outlet after flowing into the heat management auxiliary device from the heat exchange medium inlet. The heat exchange medium in the battery box can flow to the heat exchange medium outlet rather than flowing back into the battery box after flowing into the heat management auxiliary device, reducing the risk of the heat exchange medium flowing back, and making the heat exchange work of the battery box more reliable.

[0014] In some embodiments, in the extending direction of the fourth connecting pipe, the distance between the third control valve and the second communication port is less than the distance between the third control valve and the third communication port.

[0015] In the above technical solution, heat exchange medium waste can be reduced at the heat exchange medium input end of the battery box to improve the heat exchange efficiency of the battery box.

[0016] In some embodiments, in the extending direction of the third connecting pipe, the distance between the second control valve and the first communication port is less than the distance between the second control valve and the fourth communication port.

[0017] In the above technical solution, heat transfer medium waste can be reduced at the heat transfer medium input end of the battery box to improve the heat transfer efficiency of the battery box.

[0018] In some embodiments, the heat transfer medium inlet and the heat transfer medium outlet are coplanar.

[0019] In the above technical solution, it is convenient to connect the input interface and the output interface of the battery device and the external heat transfer medium.

[0020] In some embodiments, the first connecting pipe includes a first pipe section, a second pipe section, and a third pipe section connected in sequence. The first pipe section and the third pipe section are arranged in parallel, and the angles between them and the second pipe section are greater than or equal to 90°. The first control valve is located on the second pipe section.

[0021] In the above technical solution, it is convenient for the two ends of the first connecting pipe to be respectively connected to the first interface and the external input interface, and it is also beneficial to increase the flow velocity of the heat transfer medium in the first connecting pipe to improve the heat transfer efficiency of the battery box.

[0022] In some embodiments, the second connecting pipe includes a fourth pipe section and a fifth pipe section. One end of the fourth pipe section cooperates with the battery box. One end of the fifth pipe section is connected to the fourth pipe section, and the other end has the heat transfer medium outlet. The fourth communication port is located between the fourth control valve and the second interface. The angle between the fourth pipe section and the third connecting pipe is greater than or equal to 90°.

[0023] In the above technical solution, during the process when the battery device is in the second state, it can make the heat transfer medium more likely to flow into the battery box rather than directly flow to the heat transfer medium outlet after flowing into the thermal management auxiliary device from the heat transfer medium inlet, reducing the risk of heat transfer medium backflow and making the heat transfer work of the battery box more reliable.

[0024] In some embodiments, the battery device further includes: a low-voltage connector, which is electrically connected to the control valve and used to control the switching of the control valve.

[0025] In the above technical solution, through the low-voltage connector in the battery device, the switching of the control valve can be controlled without changing other structures of the electrical equipment, facilitating the use of the battery device of the present application for a variety of different electrical equipment without changing other structures of the electrical equipment, making the battery device more practical and having a wider application range.

[0026] In some embodiments, the battery device further includes: a battery management system, which communicates with the control valve and is used to control the switching of the control valve.

[0027] In the above technical solution, through the battery management system in the battery device, the switching of the control valve can be controlled without changing other structures of the electrical equipment, facilitating the use of the battery device of the present application for a variety of different electrical equipment without changing other structures of the electrical equipment, making the battery device more practical and having a wider application range.

[0028] In a second aspect, an embodiment of the present application further provides an electrical equipment, including the above battery device.

[0029] In the above technical solution, by adopting the above battery device, the battery device is switched between the first state and the second state, so as to exchange the connection between the heat exchange medium inlet and outlet and the first and second interfaces of the battery box without changing the positions of the heat exchange medium inlet and outlet at the heat management auxiliary device, realizing the bidirectional flow of the heat exchange medium in the battery box, making the heat exchange effect near the first interface and the second interface in the battery box better, facilitating keeping the overall temperature of the battery box within a suitable range, making the cooling or heating effect of each part in the battery box more balanced, making the performance of the battery device better and the safety better, and the heat management auxiliary device is arranged outside the battery box, without changing the internal structure of the battery box, facilitating keeping parameters such as the energy density of the battery box within a suitable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of an electrical equipment according to some embodiments of the present application;

[0031] Figure 2 is a schematic structural diagram of a battery device according to some embodiments of the present application, where the battery device is in the first state;

[0032] Figure 3 is a schematic structural diagram of a heat management auxiliary device according to some embodiments of the present application;

[0033] Figure 4 is a flow path diagram of a battery device according to some embodiments of the present application, where the battery device is in the first state and the first connecting pipe extends along a broken line;

[0034] Figure 5 is a flow path diagram of a battery device according to some embodiments of the present application, where the battery device is in the first state and the first connecting pipe extends along a straight line;

[0035] Figure 6 is a flow path diagram of a battery device according to some embodiments of the present application, where the battery device is in the second state.

[0036] Reference numerals:

[0037] Electrical equipment 1000;

[0038] Battery device 100; Controller 200; Motor 300;

[0039] Battery box 10; Connector 11; First interface 111; Second interface 112;

[0040] Thermal management auxiliary device 20; Connecting pipe 21;

[0041] First connecting pipe 22; Heat exchange medium inlet 221; First communication port 222; Second communication port 223; First pipe section 224; Second pipe section 225; Third pipe section 226;

[0042] Second connecting pipe 23; Heat exchange medium outlet 231; Third communication port 232; Fourth communication port 233; Fourth pipe section 234; Fifth pipe section 235; Sixth pipe section 2351; Seventh pipe section 2352;

[0043] Third connecting pipe 24;

[0044] Fourth connecting pipe 25;

[0045] Control valve 26; First control valve 261; Second control valve 262; Third control valve 263; Fourth control valve 264;

[0046] Low-voltage connector 30. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0049] In this application, the mention of "embodiment" means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0050] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", "attached" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The term "and / or" in this application is merely an association relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0052] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed descriptions of the same components are omitted. It should be understood that the thicknesses, lengths, widths, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0053] The "plurality" mentioned in this application refers to two or more (including two).

[0054] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as aerospace. With the continuous expansion of the application fields of batteries, the market demand for them is also constantly increasing.

[0055] The temperature of the battery will directly affect many performance indicators of the battery, such as battery internal resistance, battery capacity, battery self-discharge power, and battery service life. If the battery temperature is too high or too low, it is easy to cause the decline of battery performance. Therefore, it is necessary to keep the battery temperature within an appropriate range to ensure that the battery performance meets the requirements.

[0056] In the related art, a high-temperature or low-temperature heat exchange medium is introduced into a battery, and the heat exchange medium exchanges heat with the battery to adjust the battery temperature. However, the heat exchange medium flows into the battery from one interface of the battery and flows out of the battery from another interface of the battery. The flow direction of the heat exchange medium in the battery is a one-way flow, and there is a problem of poor heat exchange effect near the interface of the battery where the heat exchange medium flows out. For example, the temperature of the high-temperature heat exchange medium is low at the interface where the heat exchange medium flows out of the battery, resulting in a relatively low temperature near the interface where the heat exchange medium flows out of the battery and a poor heat exchange effect. For example, the temperature of the low-temperature heat exchange medium is high at the interface where the heat exchange medium flows out of the battery, resulting in a relatively high temperature near the interface where the heat exchange medium flows out of the battery and a poor heat exchange effect. Such problems exist throughout the entire life cycle of the battery. The long-term existence of such problems will affect the consistency of the battery cells, resulting in a low service life of the battery, and even causing problems such as explosion due to excessive battery temperature, with poor safety.

[0057] Based on this, the present application proposes a battery device, including a battery box body and a heat management auxiliary device. The heat management auxiliary device connects the heat exchange medium inlet and the heat exchange medium outlet to the first interface and the second interface of the battery box body respectively, so that the battery device has a first state and a second state. In the first state, the heat exchange medium inlet is connected to the first interface of the battery box body and the heat exchange medium outlet is connected to the second interface of the battery box body. In the second state, the heat exchange medium inlet is connected to the second interface and the heat exchange medium outlet is connected to the first interface.

[0058] In the above embodiment, the battery device has a first state and a second state through the heat management auxiliary device. The battery device can be alternately switched between the first state and the second state, enabling the heat exchange medium to flow bidirectionally in the battery box body, which is beneficial to improving the heat exchange effect near the first interface and the second interface of the battery box body, realizing the thermal management temperature balance in the battery box body, solving the problem of poor heat exchange effect near the interface of the battery device where the heat exchange medium flows out. Such problems are not likely to occur throughout the entire life cycle of the battery device. The battery device has good consistency of battery cells, which is beneficial to extending the service life of the battery device. The battery device is also not likely to explode due to excessive temperature, and has good safety.

[0059] In the present application, a battery device refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in the present application may include a battery module or a battery pack, etc. The battery device may include a battery box body for encapsulating one or more battery cells or multiple battery modules. The battery box body can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0060] In this application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of this application are not limited thereto. The battery cell may be in a cylindrical shape, a flat shape, a cuboid shape, or other shapes, and the embodiments of this application are not limited thereto either. Generally, the battery cells are divided into three types according to the encapsulation method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of this application are not limited thereto either. For example, the battery cell includes an end cap, a housing, a battery core assembly, and other functional components.

[0061] The battery device of the embodiments of this application is used for an electrical device, and the battery device supplies power to the electrical device. The electrical device may be a vehicle, a ship, an aircraft, etc., and the battery device of the embodiments of this application can form the power supply system of the electrical device to ensure the use safety and reliability of the electrical device.

[0062] For example, the electrical device disclosed in the embodiments of this application may be, but is not limited to, a vehicle, a mobile phone, a tablet computer, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, or a gas vehicle, or a new energy vehicle, or a rail vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, an electric planer, etc.

[0063] For the convenience of description in the following embodiments, the electrical device 1000 is taken as an example of a vehicle for description.

[0064] Refer to Figure 1 As shown, a battery device 100 is provided inside the vehicle, and the battery device 100 may be provided at the bottom, the head, or the tail of the vehicle. The battery device 100 can be used for power supply of the vehicle. For example, the battery device 100 can be used as the operating power supply of the vehicle. The vehicle may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle.

[0065] In the embodiment of this application, the battery device 100 can not only be used as the operating power supply of the vehicle, but also be used as the driving power supply of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0066] Next, with reference to the drawings, the battery device 100 according to the embodiments of this application will be described.

[0067] As shown in reference to Figures 2 - 6 , the battery device 100 includes a battery box 10 and a thermal management auxiliary device 20. The battery box 10 has a first interface 111 and a second interface 112 that communicate with an internal heat exchange flow channel. The heat exchange flow channel inside the battery box 10 is used to circulate a heat exchange medium. Through the first interface 111, a heat exchange medium can be introduced into the heat exchange flow channel inside the battery box 10 or the heat exchange medium inside the battery box 10 can be discharged. Through the second interface 112, a heat exchange medium can be introduced into the battery box 10 or the heat exchange medium inside the battery box 10 can be discharged. The heat exchange medium can be a coolant with a lower temperature, etc., to cool the inside of the battery box 10, such as water cooling, to reduce the risk that the battery box 10 affects its performance or even explodes due to excessive temperature. The heat exchange medium can also be a medium with a higher temperature, to heat the battery box 10, such as water heating, to reduce the possibility that the battery box 10 has a performance decline due to too low a temperature.

[0068] The thermal management auxiliary device 20 has a heat exchange medium inlet 221 and a heat exchange medium outlet 231. A control valve 26 is provided inside the thermal management auxiliary device 20. The control valve 26 switches between an open state and a closed state to enable the battery device 100 to switch between a first state and a second state. In the first state, the heat exchange medium inlet 221 communicates with the first interface 111 and the heat exchange medium outlet 231 communicates with the second interface 112. In the second state, the heat exchange medium inlet 221 communicates with the second interface 112 and the heat exchange medium outlet 231 communicates with the first interface 111. The control valve 26 can be a one-way valve, a multi-way valve or other types of valves, as long as it can realize the switching of the battery device 100 between the first state and the second state.

[0069] In the first state, by continuously introducing a heat exchange medium into the first interface 111 of the battery box 10 through the thermal management auxiliary device 20 and continuously discharging the heat exchange medium inside the battery box 10 from the second interface 112, the temperature inside the battery box 10 can be controlled to remain within an appropriate range. However, after the battery device 100 works in the first state for a period of time, the heat exchange effect at the second interface 112 of the battery box 10 will become worse. For example Figures 2 - 5 shown, the heat exchange medium is introduced into the first interface 111 through the thermal management auxiliary device 20 from the heat exchange medium inlet 221. After the heat exchange medium flows through various parts inside the battery box 10, it flows out of the battery box 10 through the second interface 112, so that all parts inside the battery box 10 exchange heat with the heat exchange medium to adjust the temperature of each part inside the battery box 10. As Figure 2 shown by the continuous arrows, the flow path of the heat exchange medium is long, resulting in a worse heat exchange effect near the second interface 112 inside the battery box 10 than near the first interface 111. And after working for a period of time, the heat exchange effect at the second interface 112 will become worse and worse, affecting the performance of the battery device 100.

[0070] For example, a low-temperature heat exchange medium is introduced into the first interface 111 through the heat exchange medium inlet 221, and the low-temperature heat exchange medium is discharged from the second interface 112 to cool the battery box 10. However, the temperature of the heat exchange medium at the second interface 112 will be higher than that of the heat exchange medium at the first interface 111. For example, a high-temperature heat exchange medium is introduced into the first interface 111 through the heat exchange medium inlet 221, and the low-temperature heat exchange medium is discharged from the second interface 112 to heat the battery box 10. However, the temperature of the heat exchange medium at the second interface 112 will be lower than that of the heat exchange medium at the first interface 111.

[0071] At this time, the opening and closing states of the control valve 26 can be adjusted to switch the battery device 100 from the first state to the second state. As Figure 6 shown, in the second state, the heat management auxiliary device 20 continuously introduces the heat exchange medium into the second interface 112 of the battery box 10 and discharges the heat exchange medium in the battery box 10 from the first interface 111 to improve the heat exchange effect at the second interface 112. Similarly, after the battery box 10 works in the second state for a period of time, the heat exchange effect at the first interface 111 of the battery box 10 will deteriorate. The battery device 100 can be timely switched from the second state to the first state through the control valve 26 to improve the heat exchange effect at the first interface 111.

[0072] Therefore, cycling the battery device 100 between the first state and the second state for heat exchange work can balance the temperatures of the components in the battery box 10, reduce the temperature difference between the components near the first interface 111 and the second interface 112 in the battery box 10, and make the heat exchange effects of all parts in the battery device 100 better. In particular, the heat exchange effects near the first interface 111 and the second interface 112 in the battery device 100 are better, which is conducive to keeping the temperature of the battery box 10 always controlled within an appropriate range to improve the performance of the battery device 100.

[0073] By adjusting the opening and closing states of the control valve 26, it is possible to exchange the connection states between the first interface 111 and the second interface 112 of the battery box 10 and the heat exchange medium inlet 221 and the heat exchange medium outlet 231 respectively without changing the positions of the heat exchange medium inlet 221 and the heat exchange medium outlet 231 of the heat management auxiliary device 20, realizing the two-way flow of the heat exchange medium in the battery box 10, which is convenient to operate and has strong practicability.

[0074] The heat management auxiliary device 20 is arranged outside the battery box 10, which can connect the heat management auxiliary device 20 with the battery box 10 without changing the original internal structure of the battery box 10, and is not likely to affect parameters such as the energy density of the battery box 10, with little modification to the battery box 10, but can realize the two-way flow of the heat exchange medium in the battery box 10 and has a good heat exchange effect.

[0075] The thermal management auxiliary device 20 is detachably connected to the battery box 10, which facilitates connecting the thermal management auxiliary device 20 to the battery box 10 to achieve the bidirectional flow of the heat exchange medium in the battery box 10, and also facilitates detaching the thermal management auxiliary device 20 from the battery box 10 for maintenance or replacement of the thermal management auxiliary device 20.

[0076] Thus, for the battery device 100 according to the embodiment of the present application, the thermal management auxiliary device 20 enables the battery device 100 to switch between the first state and the second state, so as to exchange the connection between the heat exchange medium inlet 221 and the heat exchange medium outlet 231 and the first interface 111 and the second interface 112 of the battery box 10 respectively while the positions of the heat exchange medium inlet 221 and the heat exchange medium outlet 231 at the thermal management auxiliary device 20 remain unchanged, realizing the bidirectional flow of the heat exchange medium in the battery box 10, making the heat exchange effect near the first interface 111 and the second interface 112 in the battery box 10 better, facilitating keeping the overall temperature of the battery box 10 within a suitable range, making the cooling or heating effect of each part in the battery box 10 more balanced, making the performance of the battery device 100 better and the safety better, and the thermal management auxiliary device 20 is arranged outside the battery box 10, without changing the internal structure of the battery box 10, which is conducive to keeping parameters such as the energy density of the battery box 10 within a suitable range.

[0077] In some embodiments of the present application, as Figures 2 - 6 shown, the thermal management auxiliary device 20 includes a plurality of connecting pipes 21, the battery box 10 has at least one joint 11, the joint 11 defines at least one of the first interface 111 and the second interface 112, and a part of the plurality of connecting pipes 21 is in plug-in fit with the joint 11.

[0078] The detachable connection between the thermal management auxiliary device 20 and the battery box 10 is realized through the plug-in fit between the connecting pipe 21 and the joint 11, the installation and disassembly operations are more convenient, the practicability is better, and there is no need to add other components to connect or disassemble the thermal management auxiliary device 20 and the battery box 10, which is conducive to simplifying the structure of the battery device 100.

[0079] For example Figures 2 - 6 shown, the battery box 10 has two joints 11, the two joints 11 respectively define the first interface 111 and the second interface 112, the left end of one connecting pipe 21 is in plug-in fit with the joint 11 defining the first interface 111, and the left end of the other connecting pipe 21 is in plug-in fit with the joint 11 defining the second interface 112. Another example is that the battery box 10 has one joint 11, the joint 11 defines the first interface 111 and the second interface 112, and one ends of the two connecting pipes 21 are respectively in plug-in fit with the first interface 111 and the second interface 112 of the joint 11.

[0080] It should be noted that in this application, the descriptions of orientations such as up and down, front and back, left and right are only based on the orientations marked in the drawings, rather than restrictions on the usage orientations of the battery device 100, especially the thermal management auxiliary device 20.

[0081] By inserting and mating the connecting pipe 21 with the joint 11, the detachable connection between the thermal management auxiliary device 20 and the battery box 10 is realized, making the installation and disassembly operations of the thermal management auxiliary device 20 on the battery box 10 more convenient, easy to assemble and disassemble, and conducive to simplifying the structure of the battery device 100.

[0082] In some embodiments of this application, as Figures 3 - 6 shown, the thermal management auxiliary device 20 includes a plurality of connecting pipes 21. The plurality of connecting pipes 21 include a first connecting pipe 22, a second connecting pipe 23, a third connecting pipe 24, and a fourth connecting pipe 25. One end of the first connecting pipe 22 has a heat exchange medium inlet 221, and one end of the second connecting pipe 23 has a heat exchange medium outlet 231. The first connecting pipe 22 and the second connecting pipe 23 are connected through the third connecting pipe 24 and the fourth connecting pipe 25. The other end of the first connecting pipe 22 can be communicated with the first interface 111, and the other end of the second connecting pipe 23 can be communicated with the second interface 112. Or the other end of the first connecting pipe 22 can be communicated with the second interface 112, and the other end of the second connecting pipe 23 can be communicated with the first interface 111. For ease of understanding, the following takes the case where the other end of the first connecting pipe 22 is communicated with the first interface 111 and the other end of the second connecting pipe 23 is communicated with the second interface 112 as an example for explanation. Embodiments where the other end of the first connecting pipe 22 is communicated with the second interface 112 and the other end of the second connecting pipe 23 is communicated with the first interface 111 are also easy to obtain.

[0083] The heat exchange medium flowing into the first connecting pipe 22 from the heat exchange medium inlet 221 can continue to flow along the first connecting pipe 22, or can flow from the first connecting pipe 22 into the third connecting pipe 24 and then into the second connecting pipe 23, or can also flow from the first connecting pipe 22 into the fourth connecting pipe 25 and then into the second connecting pipe 23. The heat exchange medium in the battery box 10 can flow into the second connecting pipe 23 and then continue to flow along the second connecting pipe 23 to flow out from the heat exchange medium outlet 231, or can flow into the second connecting pipe 23 and then flow through the third connecting pipe 24, the first connecting pipe 22, and the fourth connecting pipe 25 and then flow to the second connecting pipe 23 to flow out from the heat exchange medium outlet 231, or can flow into the second connecting pipe 23 and then flow through the fourth connecting pipe 25, the first connecting pipe 22, and the third connecting pipe 24 and then flow to the second connecting pipe 23 to flow out from the heat exchange medium outlet 231, etc. Due to space limitations, the flow path forms in the thermal management auxiliary device 20 are not listed one by one here.

[0084] Therefore, through the first connecting pipe 22, the second connecting pipe 23, the third connecting pipe 24, and the fourth connecting pipe 25, multiple flow paths for circulating the heat exchange medium can be formed in the heat management auxiliary device 20, facilitating the switching of the flow paths of the heat exchange medium in the heat management auxiliary device 20 to achieve multi-directional flow.

[0085] There are multiple control valves 26, and the multiple control valves 26 are provided on at least a part of the multiple connecting pipes 21. For example, the multiple control valves 26 are provided on one, two, three, or more of the multiple connecting pipes 21. For example Figures 3 - 6 As shown, there are four control valves 26, and the four control valves 26 are respectively provided on the first connecting pipe 22, the second connecting pipe 23, the third connecting pipe 24, and the fourth connecting pipe 25.

[0086] Through the multiple control valves 26, the flow direction of the heat exchange medium in the multiple connecting pipes 21 can be controlled, so that the heat exchange medium can switch and flow between multiple flow paths in the heat management auxiliary device 20, making it easy for the heat exchange medium inlet 221 to be selectively connected to one of the first interface 111 and the second interface 112, and making the heat exchange medium outlet 231 selectively connected to one of the first interface 111 and the second interface 112. The structure for realizing the two-way flow of the heat exchange medium in the battery box 10 through the heat management auxiliary device 20 is simpler and easier to manufacture.

[0087] Therefore, multiple flow paths can be formed in the heat management auxiliary device 20 through the multiple connecting pipes 21, and the switching of the heat exchange medium between multiple flow paths in the heat management auxiliary device 20 can be realized through the multiple control valves 26 to control the flow direction of the heat exchange medium in the heat management auxiliary device 20. Furthermore, the heat exchange medium can be selectively introduced into the battery box 10 from one of the first interface 111 and the second interface 112, realizing the two-way flow of the heat exchange medium in the battery box 10.

[0088] In some embodiments of the present application, as Figures 3 - 6 shown, there is a first communication port 222 between the first connecting pipe 22 and the third connecting pipe 24, and a second communication port 223 between the first connecting pipe 22 and the fourth connecting pipe 25. The first communication port 222 is closer to the heat exchange medium inlet 221 than the second communication port 223, so that the heat exchange medium first flows through the first communication port 222 after entering the first connecting pipe 22 from the heat exchange medium inlet 221. There is a third communication port 232 between the second connecting pipe 23 and the fourth connecting pipe 25, and a fourth communication port 233 between the second connecting pipe 23 and the third connecting pipe 24. The third communication port 232 is closer to the heat exchange medium outlet 231 than the fourth communication port 233, so that the heat exchange medium flowing into the heat management auxiliary device 20 from the battery box 10 finally flows through the third communication port 232 and then flows to the heat exchange medium outlet 231.

[0089] One end of the third connecting pipe 24 communicates with the first communication port 222 and the other end communicates with the fourth communication port 233. One end of the fourth connecting pipe 25 communicates with the second communication port 223 and the other end communicates with the third communication port 232. The heat exchange medium flowing through the first communication port 222 can continue to flow along the first connecting pipe 22 to the second communication port 223, or flow into the third connecting pipe 24 and then flow to the fourth communication port 233 of the second connecting pipe 23. The heat exchange medium flowing through the second communication port 223 can continue to flow along the first connecting pipe 22 to the first interface 111, or flow into the fourth connecting pipe 25 and then flow to the third communication port 232 of the second connecting pipe 23.

[0090] The multiple control valves 26 include a first control valve 261, a second control valve 262 and a third control valve 263. The first control valve 261 is arranged on the first connecting pipe 22 and is located between the first communication port 222 and the second communication port 223. The first control valve 261 can connect the first connecting pipe 22 in the open state or block the first connecting pipe 22 in the closed state. The heat exchange medium flowing through the first communication port 222 in the first connecting pipe 22 can continue to flow along the first connecting pipe 22 in the open state of the first control valve 261, and flow into the third connecting pipe 24 in the closed state of the first control valve 261. The heat exchange medium flowing through the second communication port 223 in the first connecting pipe 22 can continue to flow along the first connecting pipe 22 in the open state of the first control valve 261, and flow into the fourth connecting pipe 25 in the closed state of the first control valve 261.

[0091] The second control valve 262 is arranged on the third connecting pipe 24. The second control valve 262 can connect the third connecting pipe 24 in the open state or block the third connecting pipe 24 in the closed state. The heat exchange medium in the third connecting pipe 24 can flow to the first communication port 222 to flow into the first connecting pipe 22, or flow to the fourth communication port 233 to flow into the second connecting pipe 23 in the open state of the second control valve 262. In the closed state of the second control valve 262, the heat exchange medium in the first connecting pipe 22 cannot flow into the second connecting pipe 23 through the third connecting pipe 24, and the heat exchange medium in the second connecting pipe 23 cannot flow into the first connecting pipe 22 through the third connecting pipe 24.

[0092] The third control valve 263 is provided in the fourth connecting pipe 25. The third control valve 263 can communicate with the fourth connecting pipe 25 in the open state or block the fourth connecting pipe 25 in the closed state. The heat exchange medium in the fourth connecting pipe 25 can flow to the second communication port 223 to flow into the first connecting pipe 22 or flow to the third communication port 232 to flow into the second connecting pipe 23 in the open state of the third control valve 263. In the closed state of the second control valve 262, the heat exchange medium in the first connecting pipe 22 cannot flow into the second connecting pipe 23 through the fourth connecting pipe 25, and the heat exchange medium in the second connecting pipe 23 cannot flow into the first connecting pipe 22 through the fourth connecting pipe 25.

[0093] Among them, in the first state, the first control valve 261 is in the open state, and the second control valve 262 and the third control valve 263 are in the closed state. The flow direction of the heat exchange medium is as Figures 4 - 5 shown by the continuous arrow in the figure. The heat exchange medium flowing into the first connecting pipe 22 from the heat exchange medium inlet 221 first flows through the first communication port 222 and continues to flow along the first connecting pipe 22, then flows through the second communication port 223 and continues to flow along the first connecting pipe 22 to flow to the first interface 111 and then flow into the battery box 10. The heat exchange medium in the battery box 10 flows into the second connecting pipe 23 from the second interface 112 and first flows through the fourth communication port 233 and continues to flow along the second connecting pipe 23, then flows through the third communication port 232 and continues to flow along the second connecting pipe 23 to flow to the heat exchange medium outlet 231.

[0094] In the second state, the first control valve 261 is in the closed state, and the second control valve 262 and the third control valve 263 are in the open state. The flow direction of the heat exchange medium is as Figure 6 shown by the continuous arrow in the figure. The heat exchange medium flowing into the first connecting pipe 22 from the heat exchange medium inlet 221 first flows through the first communication port 222 and flows into the third connecting pipe 24, then flows through the third connecting pipe 24 to the fourth communication port 233 to flow into the second connecting pipe 23, and then flows along the second connecting pipe 23 to flow to the second interface 112 and then flow into the battery box 10. The heat exchange medium in the battery box 10 flows into the first connecting pipe 22 from the second interface 112 and first flows through the second communication port 223 and flows into the fourth connecting pipe 25, then flows through the fourth connecting pipe 25 to the third communication port 232 to flow into the second connecting pipe 23, and then flows along the second connecting pipe 23 to flow to the heat exchange medium outlet 231.

[0095] By controlling the opening and closing states of the first control valve 261, the second control valve 262, and the third control valve 263 respectively, the flow state of the heat exchange medium in multiple flow paths of the thermal management auxiliary device 20 can be selected, making the switching of the heat exchange medium between multiple flow paths in the thermal management auxiliary device 20 more controllable, facilitating the control of the battery device 100 to switch between the first state and the second state, so as to realize the bidirectional flow of the heat exchange medium in the battery box 10.

[0096] In some embodiments of the present application, as Figures 3 - 6 shown, the battery device 100 further includes a fourth control valve 264. The fourth control valve 264 is arranged on the second connecting pipe 23 and is located between the third communication port 232 and the fourth communication port 233. The fourth control valve 264 can connect the second connecting pipe 23 in the open state or block the second connecting pipe 23 in the closed state. The heat exchange medium flowing through the fourth communication port 233 in the second connecting pipe 23 can continue to flow along the second connecting pipe 23 in the state where the fourth control valve 264 is open, and flow into the third connecting pipe 24 in the state where the fourth control valve 264 is closed. The heat exchange medium flowing through the third communication port 232 in the second connecting pipe 23 can continue to flow along the second connecting pipe 23 in the state where the fourth control valve 264 is open, and flow into the fourth connecting pipe 25 in the state where the fourth control valve 264 is closed.

[0097] In the first state, the fourth control valve 264 is in the open state. The flow direction of the heat exchange medium is as Figures 4 - 5 shown by the continuous arrow in the figure. After the heat exchange medium in the battery box 10 flows into the second connecting pipe 23 from the second interface 112, it can flow through the position of the fourth valve body during the process of flowing through the fourth communication port 233 and continuing to flow along the second connecting pipe 23, and then flow to the heat exchange medium outlet 231 after flowing through the third communication port 232.

[0098] In the second state, the fourth control valve 264 is in the closed state. The flow direction of the heat exchange medium is as Figure 6 shown by the continuous arrow in the figure. After the heat exchange medium flowing into the first connecting pipe 22 from the heat exchange medium inlet 221 flows through the first communication port 222, the third connecting pipe 24, and the fourth communication port 233 and then flows into the second connecting pipe 23, since the fourth control valve 264 blocks the third communication port 232 and the fourth communication port 233 in the second connecting pipe 23, the heat exchange medium flows to the second interface 112 instead of the third communication port 232, reducing the possibility that the heat exchange medium flows to the third communication port 232 and then flows to the heat exchange medium outlet 231. Therefore, through the fourth control valve 264, the risk that the heat exchange medium flows out through the heat exchange medium outlet 231 without flowing into the battery box 10 after flowing into the thermal management auxiliary device 20 from the heat exchange medium inlet 221 can be reduced, preventing the heat exchange medium from flowing back at the thermal management auxiliary device 20, and improving the reliability of the heat exchange work for the battery box 10.

[0099] After the heat exchange medium in the battery box 10 flows into the first connecting pipe 22 from the first interface 111, and then flows through the second communication port 223, the fourth connecting pipe 25, and the third communication port 232 to flow into the second connecting pipe 23, since the fourth control valve 264 blocks the third communication port 232 and the fourth communication port 233 in the second connecting pipe 23, the heat exchange medium flows to the heat exchange medium outlet 231 instead of the fourth communication port 233, reducing the possibility that the heat exchange medium flows to the fourth communication port 233 and then flows into the second interface 112. Therefore, by means of the fourth control valve 264, the risk that the heat exchange medium discharged from the battery box 10 flows from the first interface 111 to the thermal management auxiliary device 20, does not flow to the heat exchange medium outlet 231, and then flows into the battery box 10 through the second interface 112 can be reduced, preventing the heat exchange medium from flowing back at the battery box 10 and improving the reliability of the heat exchange work on the battery box 10.

[0100] By controlling the opening and closing states of the fourth control valve 264 when the battery device 100 is in the first state and the second state, during the process when the battery device 100 is in the second state, the heat exchange medium can flow into the battery box 10 from the heat exchange medium inlet 221 after flowing into the thermal management auxiliary device 20 instead of directly flowing to the heat exchange medium outlet 231, and the heat exchange medium in the battery box 10 can flow to the heat exchange medium outlet 231 after flowing into the thermal management auxiliary device 20 instead of flowing back into the battery box 10 again, reducing the risk of the heat exchange medium flowing back, and making the heat exchange work of the battery box 10 more reliable.

[0101] In some embodiments of the present application, as Figures 3 - 6 shown, in the extending direction of the fourth connecting pipe 25, the distance between the third control valve 263 and the second communication port 223 is smaller than the distance between the third control valve 263 and the third communication port 232. In the first state, the heat exchange medium entering the first connecting pipe 22 from the heat exchange medium inlet 221 flows to the first interface 111 after flowing through the first communication port 222 and the second communication port 223. The second communication port 223 is communicated with the fourth connecting pipe 25, resulting in that part of the heat exchange medium will flow into the fourth connecting pipe 25 when the heat exchange medium flows through the second communication port 223, causing waste of the low-temperature heat exchange medium with a lower temperature or the high-temperature heat exchange medium with a higher temperature. And the third control valve 263 in the fourth connecting pipe 25 is closer to the second communication port 223, which can reduce the distance between the second communication port 223 and the third control valve 263, so as to reduce the heat exchange medium remaining between the second communication port 223 and the third control valve 263, reduce the waste of the heat exchange medium, enable more low-temperature heat exchange medium with a lower temperature to enter the battery box 10 to cool the battery box 10, or enable more high-temperature heat exchange medium with a higher temperature to enter the battery box 10 to heat the battery box 10, which is beneficial to improving the heat exchange efficiency of the battery box 10.

[0102] Therefore, by making the third control valve 263 closer to the second communication port 223 than to the third communication port 232 in the extending direction of the fourth connecting pipe 25, heat exchange medium waste can be reduced at the heat exchange medium input end of the battery box 10, so as to improve the heat exchange efficiency of the battery box 10.

[0103] Similarly, in some embodiments, such as Figures 3 - 6 As shown, in the extending direction of the third connecting pipe 24, the distance between the second control valve 262 and the first communication port 222 is less than the distance between the second control valve 262 and the fourth communication port 233, which can reduce the heat exchange medium remaining between the first communication port 222 and the second control valve 262, so as to reduce the waste of low-temperature heat exchange medium with lower temperature or high-temperature heat exchange medium with higher temperature, and reduce the heat exchange medium waste at the heat exchange medium input end of the battery box 10, so as to improve the heat exchange efficiency of the battery box 10.

[0104] In the related art, outside the battery box, the external interface for inputting the heat exchange medium into the battery box is denoted as the input interface, the input interface is connected to the first interface, the external interface for discharging the heat exchange medium in the battery box is denoted as the output interface, and the output interface is connected to the second interface. For the convenience of connection, the input interface, the output interface, the first interface, and the second interface are usually located on the same plane.

[0105] In some embodiments of the present application, such as Figure 3 As shown, the heat exchange medium inlet 221 and the heat exchange medium outlet 231 are coplanar, which can adapt to the positions of the input interface and the output interface outside the battery device 100, and make the heat exchange medium inlet 221, the heat exchange medium outlet 231, the input interface, and the output interface coplanar, facilitating the connection between the battery device 100 and the external input interface and output interface.

[0106] In some embodiments, such as Figure 3 As shown, the center lines of the first connecting pipe 22 and the second connecting pipe 23 are coplanar, making the centers of the two ends of the first connecting pipe 22 and the centers of the two ends of the second connecting pipe 23 coplanar, which can make the centers of the heat exchange medium inlet 221, the end of the first connecting pipe 22 connected to the first interface 111, the heat exchange medium outlet 231, and the end of the second connecting pipe 23 connected to the second interface 112 coplanar, facilitating the coplanarity of the centers of the heat exchange medium inlet 221, the heat exchange medium outlet 231, the first interface 111, and the second interface 112, and facilitating the connection between the battery box 10 and the heat management auxiliary device 20, as well as the connection between the battery device 100 and the external input interface and output interface.

[0107] In some embodiments, such as Figure 3As shown, the centerlines of the first connecting pipe 22, the second connecting pipe 23, and the third connecting pipe 24 are coplanar, which enables the third connecting pipe 24 to be located between the first connecting pipe 22 and the second connecting pipe 23 to shorten the size of the third connecting pipe 24, facilitating the shortening of the flow path of the heat exchange medium within the heat management auxiliary device 20, thereby improving the heat exchange efficiency inside the battery box 10. It can also reduce the overall size of the heat management auxiliary device 20 and achieve miniaturization of the heat management auxiliary device 20.

[0108] Therefore, making the centerlines of the first connecting pipe 22, the second connecting pipe 23, and the third connecting pipe 24 coplanar is not only convenient for connecting the heat management auxiliary device 20 and the battery box 10, but also convenient for connecting the battery device 100 and the input and output interfaces of the external heat exchange medium, and can also shorten the flow path of the heat exchange medium within the heat management auxiliary device 20 to improve the heat exchange efficiency inside the battery box 10.

[0109] In some embodiments of the present application, as Figures 3 - 6 shown, the first connecting pipe 22 includes a first pipe section 224, a second pipe section 225, and a third pipe section 226 connected in sequence. The first pipe section 224 and the third pipe section 226 are arranged in parallel, and the first pipe section 224 and the third pipe section 226 are respectively used to connect to the first interface 111 and the external input interface, facilitating the connection of both ends of the first connecting pipe 22 to the first interface 111 and the external input interface respectively.

[0110] The angle between the first pipe section 224 and the second pipe section 225 is greater than or equal to 90°, such that during the process of the heat exchange medium flowing from the second pipe section 225 into the first pipe section 224, the turning angle of the flow path where the heat exchange medium is located is relatively small, making it easy for the heat exchange medium in the second pipe section 225 to flow into the first pipe section 224, which is conducive to increasing the flow velocity of the heat exchange medium between the first pipe section 224 and the second pipe section 225 to improve the heat exchange efficiency of the battery device 100. For example, the angle between the first pipe section 224 and the second pipe section 225 is 90°, 150°, or 180°, etc. In particular, in the embodiment where the angle between the first pipe section 224 and the second pipe section 225 is equal to 180°, as Figure 5 shown, the first pipe section 224 and the second pipe section 225 are straight pipes as a whole, and the flow velocity of the heat exchange medium between the first pipe section 224 and the second pipe section 225 is the maximum.

[0111] The included angle between the third pipe segment 226 and the second pipe segment 225 is greater than or equal to 90°. Similarly, it makes the heat exchange medium in the third pipe segment 226 flow into the second pipe segment 225 more easily, which is conducive to increasing the flow rate of the heat exchange medium between the third pipe segment 226 and the second pipe segment 225, so as to improve the heat exchange efficiency of the battery device 100. For example, the included angle between the third pipe segment 226 and the second pipe segment 225 is 90°, 150° or 180°, etc. In particular, in the embodiment where the included angle between the third pipe segment 226 and the second pipe segment 225 is equal to 180°, as Figure 5 shown, the third pipe segment 226 and the second pipe segment 225 are straight pipes as a whole, and the flow rate of the heat exchange medium between the third pipe segment 226 and the second pipe segment 225 is the largest.

[0112] The first control valve 261 is located in the second pipe segment 225, and the first communication port 222 and the second communication port 223 are located on both sides of the first control valve 261, so that the heat exchange medium at the first communication port 222 and the second communication port 223 flows into the first connecting pipe 22 more easily, thereby improving the heat exchange efficiency of the battery box 10.

[0113] Therefore, the first pipe segment 224 and the third pipe segment 226 are arranged in parallel, so that the two ends of the first connecting pipe 22 are convenient to be respectively connected to the first interface 111 and the external input interface. The included angles between the first pipe segment 224 and the third pipe segment 226 and the second pipe segment 225 are greater than or equal to 90°. The first control valve 261 is located in the second pipe segment 225, which is conducive to increasing the flow rate of the heat exchange medium in the first connecting pipe 22, so as to improve the heat exchange efficiency of the battery box 10.

[0114] In some embodiments of the present application, as Figures 3 - 6 shown, the second connecting pipe 23 includes a fourth pipe segment 234 and a fifth pipe segment 235 connected in sequence. One end of the fourth pipe segment 234 cooperates with the battery box 10. One end of the fifth pipe segment 235 is connected to the fourth pipe segment 234 and the other end has a heat exchange medium outlet 231. The fourth communication port 233 is located between the fourth control valve 264 and the second interface 112. The included angle between the fourth pipe segment 234 and the third connecting pipe 24 is greater than or equal to 90°. It makes the heat exchange medium in the third connecting pipe 24 flow into the fourth pipe segment 234 more easily, which is conducive to increasing the flow rate of the heat exchange medium between the third connecting pipe 24 and the fourth pipe segment 234, so as to improve the heat exchange efficiency of the battery device 100. For example, the included angle between the third connecting pipe 24 and the fourth pipe segment 234 is 90°, 150° or 180°, etc.

[0115] During the process when the battery device 100 is in the second state, the flow direction of the heat exchange medium is as Figure 6As shown by the continuous arrows, the heat exchange medium flowing into the first connecting pipe 22 from the heat exchange medium inlet 221, after flowing through the first communication port 222, the third connecting pipe 24, and the fourth communication port 233 to flow into the second connecting pipe 23, due to the angle between the fourth pipe section 234 and the third connecting pipe 24 being greater than or equal to 90°, the heat exchange medium in the third connecting pipe 24 is more likely to flow into the fourth pipe section 234 rather than the fifth pipe section 235, reducing the possibility of the heat exchange medium flowing to the heat exchange medium outlet 231 after flowing to the fifth pipe section 235. Therefore, making the angle between the fourth pipe section 234 and the third connecting pipe 24 greater than or equal to 90° can reduce the risk that the heat exchange medium flows out through the heat exchange medium outlet 231 without flowing into the battery box 10 after flowing into the heat management auxiliary device 20 from the heat exchange medium inlet 221, prevent the heat exchange medium from flowing back at the heat management auxiliary device 20, and improve the reliability of the heat exchange work for the battery box 10.

[0116] By making the angle between the fourth pipe section 234 and the third connecting pipe 24 greater than or equal to 90°, during the process when the battery device 100 is in the second state, the heat exchange medium is more likely to flow into the battery box 10 rather than directly flowing to the heat exchange medium outlet 231 after flowing into the heat management auxiliary device 20 from the heat exchange medium inlet 221, reducing the risk of the heat exchange medium flowing back, and making the heat exchange work of the battery box 10 more reliable.

[0117] In some embodiments, as Figures 3 - 6 shown, the fifth pipe section 235 includes a sixth pipe section 2351 and a seventh pipe section 2352 connected in sequence. One end of the sixth pipe section 2351 is connected to the fourth pipe section 234, one end of the seventh pipe section 2352 is connected to the sixth pipe section 2351 and the other end has the heat exchange medium outlet 231, and the angle between the seventh pipe section 2352 and the fourth connecting pipe 25 is greater than or equal to 90°. This makes the heat exchange medium in the fourth connecting pipe 254 easy to flow into the seventh pipe section 2352, which is beneficial to increasing the flow rate of the heat exchange medium between the fourth connecting pipe 254 and the seventh pipe section 2352, so as to improve the heat exchange efficiency of the battery device 100. For example, the angle between the fourth connecting pipe 254 and the seventh pipe section 2352 is 90°, 150°, or 180°, etc.

[0118] During the process when the battery device 100 is in the second state, the flow direction of the heat exchange medium is as Figure 6As shown by the continuous arrows, after the heat exchange medium in the battery box 10 flows into the first connecting pipe 22 from the first interface 111, and then flows through the second communication port 223, the fourth connecting pipe 25 and the third communication port 232 to flow into the second connecting pipe 23, since the included angle between the seventh pipe section 2352 and the fourth connecting pipe 25 is greater than or equal to 90°, the heat exchange medium in the fourth connecting pipe 25 is more likely to flow into the seventh pipe section 2352 rather than the sixth pipe section 2351, reducing the possibility that the heat exchange medium flows to the sixth pipe section 2351 and then to the second interface 112. Therefore, making the included angle between the seventh pipe section 2352 and the fourth connecting pipe 25 greater than or equal to 90° can reduce the risk that the heat exchange medium in the battery box 10 flows from the first interface 111 to the thermal management auxiliary device 20 and then flows back into the battery box 10 through the second interface 112, prevent the heat exchange medium from flowing back at the battery box 10, and improve the reliability of the heat exchange work on the battery box 10.

[0119] In some embodiments, as Figures 3 - 6 shown, the included angle between the fourth pipe section 234 and the sixth pipe section 2351 is greater than or equal to 90°, and the included angle between the sixth pipe section 2351 and the seventh pipe section 2352 is greater than or equal to 90°. Similarly, it is beneficial to increase the flow rate of the heat exchange medium in the fourth pipe section 234 and the sixth pipe section 2351, and increase the flow rate of the heat exchange medium in the sixth pipe section 2351 and the seventh pipe section 2352.

[0120] In some embodiments of the present application, as Figure 2 shown, the battery device 100 further includes a low-voltage connector 30, and the low-voltage connector 30 is electrically connected to the control valve 26. The low-voltage connector 30 is used to control the switching of the control valve 26. The electrical connection here can be a wire harness connection or a wireless connection, as long as the low-voltage connector 30 can control the switching of the control valve 26.

[0121] Through the low-voltage connector 30 in the battery device 100, the switching of the control valve 26 can be controlled without changing other structures of the electrical device 1000, facilitating the use of the battery device 100 of the present application for a variety of different electrical devices 1000 without changing other structures of the electrical device 1000, making the battery device 100 more practical and having a wider application range.

[0122] In some embodiments of the present application, the battery device 100 further includes a battery management system (abbreviated as BMS). The battery management system communicates with the control valve 26, and the battery management system is used to control the switching of the control valve 26. The communication here refers to a communication connection, and the communication connection can be a wire harness connection or a wireless connection, as long as the battery management system can control the switching of the control valve 26.

[0123] Through the battery management system in the battery device 100, the switching of the control valve 26 can be controlled without changing other structures of the electrical device 1000, facilitating the use of the battery device 100 of the present application for a variety of different electrical devices 1000 without changing other structures of the electrical device 1000, making the battery device 100 more practical and having a wider application range.

[0124] The electrical device 1000 according to the embodiment of the second aspect of the present application includes the battery device 100 according to the embodiment of the first aspect of the present application. Thus, for the electrical device 1000 according to the embodiment of the present application, by adopting the above battery device 100, the battery device 100 is switched between the first state and the second state to exchange the situation where the heat exchange medium inlet 221 and the heat exchange medium outlet 231 are respectively communicated with the first interface 111 and the second interface 112 of the battery box 10 without changing the positions of the heat exchange medium inlet 221 and the heat exchange medium outlet 231 at the heat management auxiliary device 20, realizing the bidirectional flow of the heat exchange medium in the battery box 10, making the heat exchange effect near the first interface 111 and the second interface 112 in the battery box 10 better, facilitating keeping the overall temperature of the battery box 10 within a suitable range, making the cooling or heating effect of each part in the battery box 10 more balanced, making the performance of the battery device 100 better and the safety better, and the heat management auxiliary device 20 is arranged outside the battery box 10 without changing the internal structure of the battery box 10, facilitating keeping parameters such as the energy density of the battery box 10 within a suitable range.

[0125] The following describes the battery device 100 and the electrical device 1000 having the same according to a specific embodiment of the present application with reference to the drawings. For the convenience of description in the following embodiments, the electrical device 1000 is taken as a vehicle as an example for illustration.

[0126] As Figures 1 - 4 and Figure 6 shown, a vehicle according to a specific embodiment of the present application includes a battery device 100, a controller 200, and a motor 300, and the controller 200 controls the battery device 100 to supply power to the motor 300.

[0127] The battery device 100 includes a battery box 10, a heat management auxiliary device 20, and a low-voltage connector 30. The battery box 10 has two connectors 11, one connector 11 defining a first interface 111 and the other connector 11 defining a second interface 112.

[0128] The heat management auxiliary device 20 is arranged outside the battery box 10 and is detachably connected to the battery box 10. Specifically, the heat management auxiliary device 20 includes four connecting pipes 21: a first connecting pipe 22, a second connecting pipe 23, a third connecting pipe 24, and a fourth connecting pipe 25.

[0129] The first connecting pipe 22 includes a first pipe section 224, a second pipe section 225, and a third pipe section 226 that are arranged and connected in sequence from left to right. The left end of the first pipe section 224 is in plug-in fit with the joint 11 that defines the first interface 111, and the right end of the third pipe section 226 has a heat exchange medium inlet 221. The included angle between the first pipe section 224 and the second pipe section 225 is greater than or equal to 90°, the included angle between the first pipe section 224 and the second pipe section 225 is greater than or equal to 90°, and the first pipe section 224 and the third pipe section 226 are arranged in parallel. The second pipe section 225 is provided with a first communication port 222, and the first pipe section 224 is provided with a second communication port 223.

[0130] The second connecting pipe 23 includes a fourth pipe section 234, a sixth pipe section 2351, and a seventh pipe section 2352 that are arranged and connected in sequence from left to right. The left end of the fourth pipe section 234 is in plug-in fit with the joint 11 that defines the second interface 112, and the right end of the seventh pipe section 2352 has a heat exchange medium outlet 231. The second connecting pipe 23 extends in a straight line, a third communication port 232 is provided between the sixth pipe section 2351 and the seventh pipe section 2352, and a fourth communication port 233 is provided between the fourth pipe section 234 and the sixth pipe section 2351.

[0131] The upper end of the third connecting pipe 24 is communicated with the first communication port 222 and the lower end is communicated with the fourth communication port 233, and the included angle between the third connecting pipe 24 and the fourth pipe section 234 is greater than or equal to 90°. The first connecting pipe 22, the second connecting pipe 23, and the third connecting pipe 24 are coplanar.

[0132] The upper end of the fourth connecting pipe 25 is communicated with the second communication port 223 and the lower end is communicated with the third communication port 232, and the included angle between the fourth connecting pipe 25 and the seventh pipe section 2352 is greater than or equal to 90°.

[0133] Four control valves 26 are provided in the thermal management auxiliary device 20: a first control valve 261, a second control valve 262, a third control valve 263, and a fourth control valve 264. The first control valve 261 is provided on the second pipe section 225 and is located between the first communication port 222 and the second communication port 223. The second control valve 262 is provided on the third connecting pipe 24. In the extending direction of the third connecting pipe 24, the distance between the second control valve 262 and the first communication port 222 is less than the distance between the second control valve 262 and the fourth communication port 233. The third control valve 263 is provided on the fourth connecting pipe 25, and the fourth control valve 264 is provided on the sixth pipe section 2351.

[0134] The low-voltage connector 30 is electrically connected to a plurality of control valves 26. The low-voltage connector 30 is used to control the switching of each of the first control valve 261, the second control valve 262, the third control valve 263, and the fourth control valve 264 between the open state and the closed state. The plurality of control valves 26 switch between the open state and the closed state to cause the battery device 100 to switch between the first state and the second state.

[0135] Through the low-voltage connector 30, the first control valve 261 and the fourth control valve 264 are in the open state, and the second control valve 262 and the third control valve 263 are in the closed state, so that the battery device 100 is switched to the first state. As Figure 4 shown by the continuous arrows in the figure, in the first state, the heat exchange medium inlet 221 is sequentially connected to the third pipe section 226, the second pipe section 225, the third pipe section 226, and the first interface 111 to introduce the heat exchange medium from the heat exchange medium inlet 221 to the first interface 111. The second interface 112 is sequentially connected to the fourth pipe section 234, the sixth pipe section 2351, the seventh pipe section 2352, and the heat exchange medium outlet 231 to discharge the heat exchange medium in the battery box 10 from the second interface 112 to the heat exchange medium outlet 231.

[0136] Through the low-voltage connector 30, the first control valve 261 and the fourth control valve 264 are in the closed state, and the second control valve 262 and the third control valve 263 are in the open state, so that the battery device 100 is switched to the second state. As Figure 6 shown by the continuous arrows in the figure, in the second state, the heat exchange medium inlet 221 is sequentially connected to the third pipe section 226, the first communication port 222, the third connecting pipe 24, the fourth communication port 233, the fourth pipe section 234, and the second interface 112 to introduce the heat exchange medium from the heat exchange medium inlet 221 to the second interface 112. The first interface 111 is sequentially connected to the first pipe section 224, the second communication port 223, the fourth connecting pipe 25, the third communication port 232, the seventh pipe section 2352, and the heat exchange medium outlet 231 to discharge the heat exchange medium in the battery box 10 from the first interface 111 to the heat exchange medium outlet 231.

[0137] The multiple control valves 26 in the thermal management auxiliary device 20 can be controlled to be in an open state or a closed state through the low-voltage connector 30, so that the battery device 100 can switch between a first state and a second state. In the first state, a heat exchange medium is introduced into the battery box 10 through the first interface 111, and the heat exchange medium in the battery box 10 is discharged through the second interface 112. In the second state, a heat exchange medium is introduced into the battery box 10 through the second interface 112, and the heat exchange medium in the battery box 10 is discharged through the first interface 111. Through the battery device 100 in the first state and the second state, the two-way flow of the heat exchange medium in the battery box 10 can be realized, which is beneficial to improving the heat exchange efficiency of each part in the battery box 10 and making the overall cooling or heating effect of the battery box 10 better.

[0138] In the above embodiment, without changing the positions of the heat exchange medium inlet 221 and the heat exchange medium outlet 231, that is, without changing the direction of the whole vehicle (water pump) device and the input and output of the heat exchange medium to the battery device 100, and without changing the water pump flow direction, so there is no need to adjust the operation logic of the whole vehicle regarding the heat exchange medium. The thermal management auxiliary device 20 is arranged outside the battery box 10, so there is no need to change the internal structure of the battery box 10. The thermal management auxiliary device 20 is applicable to almost all battery boxes 10 in the water cooling mode or the water heating mode. Only a set (one inlet and one outlet) of connectors is required for the heat exchange medium connection between the battery device 100 and the outside. The structure interface is simple, the number of connectors connected to the outside is small, the risk of liquid leakage is low, and there will be no liquid leakage inside the battery box 10. The multiple control valves 26 can be controlled to be in an open state or a closed state through the low-voltage connector 30 of the battery device 100, without the need for wiring control at the whole vehicle end, so that the battery device 100 can be applicable to vehicles of various models, and the applicable range is wide.

[0139] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0140] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A battery box (10), the battery box (10) having a first interface (111) and a second interface (112) in communication with an internal heat exchange channel; a heat management auxiliary device (20), the heat management auxiliary device (20) being arranged outside the battery box (10) and being detachably connected to the battery box (10), the heat management auxiliary device (20) having a heat exchange medium inlet (221) and a heat exchange medium outlet (231), The thermal management auxiliary device (20) is provided with a control valve (26), and the control valve (26) switches between an open state and a closed state so that the battery device (100) switches between a first state and a second state. In the first state, the heat exchange medium inlet (221) is connected to the first interface (111) and the heat exchange medium outlet (231) is connected to the second interface (112). In the second state, the heat exchange medium inlet (221) is connected to the second interface (112) and the heat exchange medium outlet (231) is connected to the first interface (111).

2. The battery device according to claim 1, characterized in that: The thermal management auxiliary device (20) comprises a plurality of connecting tubes (21), the battery box (10) has at least one joint (11), the joint (11) defines the first interface (111) and / or the second interface (112), and a portion of the plurality of connecting tubes (21) is plug-fitted to the joint (11).

3. The battery device according to claim 1, characterized in that: The thermal management auxiliary device (20) comprises a plurality of connecting pipes (21), the plurality of connecting pipes (21) comprising a first connecting pipe (22), a second connecting pipe (23), a third connecting pipe (24) and a fourth connecting pipe (25), one end of the first connecting pipe (22) having the heat exchange medium inlet (221), one end of the second connecting pipe (23) having the heat exchange medium outlet (231), the first connecting pipe (22) and the second connecting pipe (23) being connected via the third connecting pipe (24) and the fourth connecting pipe (25), and the plurality of control valves (26) comprising a plurality of control valves (26), the plurality of control valves (26) being arranged on at least a portion of the plurality of connecting pipes (21).

4. The battery device according to claim 3, characterized in that: A first communication port (222) is provided between the first connection pipe (22) and the third connection pipe (24), and a second communication port (223) is provided between the first connection pipe (22) and the fourth connection pipe (25). The first communication port (222) is closer to the heat exchange medium inlet (221) than the second communication port (223). A third connecting port (232) is provided between the second connecting pipe (23) and the fourth connecting pipe (25), a fourth connecting port (233) is provided between the second connecting pipe (23) and the third connecting pipe (24), and the third connecting port (232) is closer to the heat exchange medium outlet (231) than the fourth connecting port (233); The plurality of control valves (26) include a first control valve (261), a second control valve (262) and a third control valve (263), The first control valve (261) is provided on the first connecting pipe (22) and is located between the first communication port (222) and the second communication port (223); The second control valve (262) is arranged on the third connecting pipe (24); The third control valve (263) is provided on the fourth connecting pipe (25), wherein: In the first state, the first control valve (261) is in an open state, and the second control valve (262) and the third control valve (263) are in a closed state; in the second state, the first control valve (261) is in a closed state, and the second control valve (262) and the third control valve (263) are in an open state.

5. The battery device according to claim 4, characterized in that: The device further comprises a fourth control valve (264), wherein the fourth control valve (264) is provided in the second connecting pipe (23) and is located between the third connecting port (232) and the fourth connecting port (233). In the first state, the fourth control valve (264) is in an open state; in the second state, the fourth control valve (264) is in a closed state.

6. The battery device according to claim 5, characterized in that In the extension direction of the fourth connecting pipe (25), the distance between the third control valve (263) and the second communication port (223) is smaller than the distance between the third control valve (263) and the third communication port (232).

7. The battery device according to claim 5, characterized in that: In the extension direction of the third connecting pipe (24), the distance between the second control valve (262) and the first communication port (222) is smaller than the distance between the second control valve (262) and the fourth communication port (233).

8. The battery device according to claim 4, characterized in that: The heat exchange medium inlet (221) and the heat exchange medium outlet (231) are coplanar.

9. The battery device according to claim 4, characterized in that: The first connecting pipe (22) comprises a first pipe section (224), a second pipe section (225) and a third pipe section (226) which are connected in sequence; the first pipe section (224) and the third pipe section (226) are arranged in parallel, and the angle between the first pipe section (224) and the third pipe section (226) and the second pipe section (225) is greater than or equal to 90°; the first control valve (261) is located in the second pipe section (225).

10. The battery device according to claim 5, characterized in that: The second connecting pipe (23) comprises a fourth pipe section (234) and a fifth pipe section (235); one end of the fourth pipe section (234) cooperates with the battery box (10); one end of the fifth pipe section (235) is connected to the fourth pipe section (234); the other end has the heat exchange medium outlet (231); the fourth connecting port (233) is located between the fourth control valve (264) and the second interface (112); and the angle between the fourth pipe section (234) and the third connecting pipe (24) is greater than or equal to 90°.

11. The battery device according to claim 1, wherein: Also includes: A low-pressure connector (30), the low-pressure connector (30) being electrically connected to the control valve (26) and used for controlling the switching of the control valve (26).

12. The battery device according to claim 1, wherein: Also includes: A battery management system, the battery management system communicates with the control valve (26) and is used to control the switching of the control valve (26).

13. An electrical equipment, characterized in that: Comprising the battery device (100) according to any one of claims 1 to 12.

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