Battery device and electric device

Abstract

The battery device comprises a battery box body and a plurality of single batteries arranged in the battery box body, the battery box body comprises a box body body and an exhaust assembly, the box body body is enclosed to form a mounting cavity and comprises an outer plate, an inner plate and a foaming layer, the outer plate is arranged on the outer side of the inner plate, and a containing cavity is defined between the outer plate and the inner plate; the containing cavity is filled with the foaming layer, a sealing interface is formed in the connecting position of the inner plate and the outer plate and surrounds the containing cavity, the exhaust assembly is connected to the box body and is suitable for communicating the containing cavity with the outer space of the box body, and the battery monomers are arranged in the mounting cavity. According to the battery device disclosed by the utility model, the exhaust component of the battery box body can exhaust the gas generated by the foaming layer in the accommodating cavity to the external space of the box body in time, so that the deformation of the box body caused by the accumulation of the gas in the box body is avoided, and the service life of the battery box body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In the related art, a foaming layer is provided in the battery box of the battery device to improve the impact resistance and sealing performance of the battery box. However, since the foaming material generates a large amount of gas during the molding process and the use of the battery box, the gas accumulates in the box body of the battery box, which can easily cause deformation of the battery box. Utility Model Content

[0003] In view of the above problems, the present application provides a battery device and an electrical device, in which the exhaust component of the battery box can discharge the gas generated by the foaming layer in the accommodating cavity to the external space of the box body in time, avoiding the accumulation of these gases in the box body and causing deformation of the box body, which is beneficial to extending the service life of the battery box.

[0004] In a first aspect, the utility model provides a battery device, comprising: a battery case, comprising a case body and an exhaust assembly, the case body enclosing an installation cavity and comprising an outer plate, an inner plate and a foaming layer, the outer plate being arranged on the outer side of the inner plate and defining a receiving cavity between the outer plate and the inner plate, the foaming layer filling the receiving cavity, the connection position between the inner plate and the outer plate forming a sealing interface, the sealing interface being arranged around the receiving cavity, the exhaust assembly being connected to the case body and being suitable for connecting the receiving cavity with the external space of the case body; a battery cell assembly, arranged in the installation cavity and comprising a plurality of battery cells.

[0005] In the above technical solution, by arranging an exhaust component on the battery case and making it suitable for connecting the accommodating cavity of the battery case with the external space of the case body, the exhaust component can discharge the gas generated by the foaming layer in the accommodating cavity to the external space of the case body in time, avoiding the accumulation of these gases in the case body and causing deformation of the case body, which is beneficial to prolonging the service life of the battery case, thereby helping to prolong the service life of the battery device.

[0006] In some embodiments, the exhaust assembly includes an exhaust pipe, one end of which is connected to the box body and communicated with the accommodating cavity, and the other end of the exhaust pipe is located outside the box body and communicated with the external space of the box body.

[0007] In the above technical solution, by making the exhaust assembly include an exhaust pipe, the structure of the exhaust pipe is simple, and the exhaust pipe can guide the gas to effectively guide the gas in the accommodating cavity to the external space of the box body. In some embodiments, the exhaust pipe extends in a curve.

[0008] In the above technical solution, by extending the exhaust pipe curve, the structure of the exhaust pipe can be flexibly arranged to avoid interference with other components of the battery box, and is conducive to reducing the noise generated by the airflow in the exhaust pipe.

[0009] In some embodiments, the exhaust assembly further includes an exhaust valve, and the exhaust valve is disposed on the exhaust pipe to control the on-off of the exhaust pipe.

[0010] In the above technical solution, by setting an exhaust valve, the exhaust pipe can reduce or prevent external moisture or water vapor from entering the battery case through the exhaust pipe; and when gas is generated in the accommodating chamber of the battery case, the exhaust valve automatically opens under the pressure difference between the accommodating chamber and the external space, releasing excess gas and reducing the risk of internal pressure accumulation, thereby avoiding deformation of the case body due to excessive pressure in the case body.

[0011] In some embodiments, the exhaust valve is disposed at the other end of the exhaust pipe.

[0012] In the above technical solution, the exhaust valve is arranged at the other end of the exhaust pipe, and the other end of the exhaust pipe is located outside the box body, which makes it easy to inspect and maintain it. For example, the exhaust assembly can be inspected or cleaned without completely disassembling the battery box.

[0013] In some embodiments, the exhaust valve is a one-way valve.

[0014] In the above technical solution, by making the exhaust valve a one-way valve, the one-way valve can prevent external air or pollutants from flowing back into the battery case through the exhaust pipe, thereby protecting the battery from external pollution; and when the internal pressure of the accommodating cavity of the battery case is higher than the atmospheric pressure of the external space, the one-way valve opens to allow excess gas to be discharged; when the internal and external pressures are balanced, the valve closes, which is also conducive to stabilizing the pressure inside the battery case.

[0015] In some embodiments, the pipe opening at one end of the exhaust pipe connected to the box body is located in the accommodating cavity.

[0016] In the above technical solution, the pipe opening at one end of the exhaust pipe connected to the box body is located in the accommodating cavity. This eliminates the need for an additional gas-guiding structure for connecting the pipe opening of the exhaust pipe and the accommodating cavity. This is beneficial for simplifying the overall structural design of the battery box. The exhaust pipe can directly discharge the gas generated by the foaming layer from the accommodating cavity, which can better reduce the gas pressure in the accommodating cavity.

[0017] In some embodiments, the battery box further includes a fixing plate, which is fixedly clamped between the inner plate and the outer plate, and a first fixing hole is formed on the fixing plate, and the exhaust pipe is passed through the first fixing hole.

[0018] In the above technical solution, the inner plate and the outer plate provide structural support for the fixed plate, the fixed plate is stably installed, and the fixed plate provides structural support for the exhaust pipe through the first fixing hole, which is beneficial to improving the installation stability of the exhaust pipe.

[0019] In some embodiments, a heat exchange component is further included, wherein the heat exchange component is fixed to the outer plate and is thermally connected to the inner plate, the inner plate is a heat conductive plate, and at least a portion of the heat exchange component is disposed in the accommodating cavity.

[0020] In the above technical solution, the heat exchange component makes full use of the space in the accommodating cavity, the battery box has a compact structure, and when the battery box is applied to a battery device, the heat exchange component can dissipate heat from the battery cells in the battery box in a timely manner to ensure the normal operation of the battery device.

[0021] In some embodiments, the heat exchange assembly includes a connected heat exchange unit and a collecting member, the heat exchange unit has a heat exchange channel, the collecting member has a liquid inlet and a liquid outlet connected to the heat exchange channel, at least a portion of the heat exchange unit is located in the accommodating cavity, and the collecting member is located outside the accommodating cavity.

[0022] In the above technical solution, by locating the current collecting member having the liquid inlet and the liquid outlet outside the accommodating cavity, the connection operation between the external pipeline of the coolant and the current collecting member is facilitated, and the inspection and maintenance thereof are facilitated.

[0023] In some embodiments, the heat exchange assembly further includes a heat exchange support plate, the heat exchange unit is a heat exchange tube and is disposed on the heat exchange support plate, and the heat exchange support plate is fixed to the outer plate;

[0024] The connection position between the inner plate and the outer plate forms a sealing interface, and the sealing interface is arranged around the accommodating cavity. The outer edge of the heat exchange support plate forms a sealing edge. The outer edge of the inner plate forms a first connecting portion, and the outer plate forms a second connecting portion. The sealing edge is located between the first connecting portion and the second connecting portion, and a first sealing interface is formed between the sealing edge and the first connecting portion, and a second sealing interface is formed between the sealing edge and the second connecting portion. The sealing interface includes the first sealing interface and the second sealing interface.

[0025] In the above technical solution, the heat exchange support plate provides support for the heat exchange tubes, and if there are multiple heat exchange tubes, it is convenient to fix the multiple heat exchange tubes on the heat exchange support plate for modular installation, which is beneficial to improving the installation production efficiency of the battery box; by forming a sealing edge on the outer edge of the heat exchange support plate, it is beneficial to the stable installation of the heat exchange component and to improve the sealing performance of the battery box.

[0026] In some embodiments, the battery box further includes a fixing plate, the fixing plate is fixedly clamped between the inner plate and the outer plate, the current collecting member is located outside the accommodating cavity, and a first fixing hole and a second fixing hole are formed on the fixing plate;

[0027] The heat exchange unit is a heat exchange tube, and the heat exchange tube has a connecting pipe section located outside the accommodating cavity. The connecting pipe section is passed through the second fixing hole and connected to the collecting member, and the exhaust component is passed through the first fixing hole.

[0028] In the above technical solution, by setting a fixing plate and forming a first fixing hole and a second fixing hole on the fixing plate, the fixing plate can be used to seal the accommodating cavity and avoid hindering the connecting pipe section and the exhaust assembly from extending to the external space of the accommodating cavity. At the same time, the fixing plate can form an effective fixed support for the connecting pipe and the exhaust assembly, which is beneficial to improving its installation stability and reliability and avoiding large-scale shaking of the connecting pipe section and the exhaust assembly during the use of the battery box.

[0029] In some embodiments, the outer panel includes a bottom guard plate, the inner panel includes a bottom plate, and at least a portion of the accommodating cavity is defined between the bottom plate and the bottom guard plate.

[0030] In the above technical solution, by defining at least a portion of the accommodating cavity between the bottom plate and the bottom guard plate of the battery box, a foaming layer is filled between the bottom plate and the bottom guard plate, which is beneficial to improving the impact resistance, sealing and other properties of the bottom plate and the bottom guard plate. When the battery box is used in a battery device, it is beneficial to improve the protective performance of the bottom plate and the bottom guard plate on the battery cells and the like in the battery box.

[0031] In a second aspect, the utility model provides an electrical device, including: a battery device according to an embodiment of the first aspect of the utility model.

[0032] In the above technical solution, by setting the above-mentioned battery device, an exhaust component suitable for connecting the accommodating cavity and the external space is provided on the battery box of the battery device. The exhaust component can discharge the gas generated by the foaming layer in the accommodating cavity to the external space of the box body in time, so as to avoid the accumulation of these gases in the box body and cause deformation of the box body, which is beneficial to prolonging the service life of the battery box, thereby helping to improve the service life of the battery device.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 is a schematic diagram of a partial structure of a battery box according to some embodiments of the utility model;

[0036] Figure 2 yes Figure 1 A schematic diagram of another part of the structure of the battery box;

[0037] Figure 3 yes Figure 1 Schematic diagram of the assembly of the heat exchange component, the exhaust component and the fixing plate;

[0038] Figure 4 yes Figure 1 Schematic diagram of the assembly of the exhaust assembly and the fixing plate;

[0039] Figure 5 yes Figure 1 A schematic assembly diagram of the exhaust assembly and the fixing plate from another perspective;

[0040] Figure 6 yes Figure 1 Schematic diagram of the exhaust valve;

[0041] Figure 7 is a schematic diagram of a battery device according to some embodiments of the present utility model;

[0042] Figure 8 It is a schematic diagram of an electrical device according to some embodiments of the utility model.

[0043] Reference numerals:

[0044] 100. Battery box;

[0045] 11. outer plate; 111. first connecting portion;

[0046] 2. Accommodating cavity;

[0047] 3. Exhaust assembly; 31. Exhaust pipe; 32. Exhaust valve;

[0048] 4. Sealing interface;

[0049] 5. fixing plate; 51. first fixing hole; 52. second fixing hole;

[0050] 6. heat exchange assembly; 61. heat exchange unit; 611. connecting pipe section; 62. current collecting piece; 621. liquid inlet; 622. liquid outlet; 63. heat exchange support plate; 631. sealing edge;

[0051] 200. Battery device;

[0052] 1000. Electrical equipment. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0054] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention in the application are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0055] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0056] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0059] The term “plurality” used in the present invention refers to two or more (including two).

[0060] In the embodiments of the present invention, unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form a new technical solution.

[0061] In the embodiments of the present invention, unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0062] In an embodiment of the present invention, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include a plurality of battery cells, which are connected in series, in parallel, or in mixed connection through a busbar. For example, a battery cell assembly is usually formed by arranging a plurality of battery cells; a battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by cable ties.

[0063] The battery device may be a battery pack, which includes a box and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box. The battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box; the battery cell assembly may also be accommodated in the box by directly fixing a plurality of battery cells to the box.

[0064] In an embodiment of the utility model, the battery case may include a first case and a second case. The first case and the second case are buckled together to form a closed space inside the case to accommodate the battery monomer assembly. The closed here means covering or closing, which can be sealed or unsealed. The first case may be a top cover or a bottom plate. For example, the battery case may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the case to accommodate the battery monomer assembly.

[0065] In an embodiment of the utility model, the battery box can be used as a part of the chassis structure of the vehicle. For example, part of the battery box can become at least a part of the floor of the vehicle, or part of the battery box can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0066] In the embodiment of the present utility model, the battery cell may be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material by charging after the battery cell is discharged; the battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the embodiment of the present utility model. The battery cell may be cylindrical, flat, rectangular or in other shapes, which is not limited in the embodiment of the present utility model. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which is not limited in the embodiment of the present utility model.

[0067] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0068] In the related art, a foaming layer is provided in the battery box to improve the impact resistance and sealing performance of the battery box. However, since the foaming material generates a large amount of gas during the molding process and the use of the battery box, the gas accumulates in the battery box body and easily causes deformation of the battery box.

[0069] Based on this, the utility model proposes a battery device, which includes a battery case and a battery cell assembly. The battery cell assembly is arranged in the battery case and includes a plurality of battery cells. The battery case includes a case body and an exhaust assembly. The case body is enclosed to form an installation cavity and includes an outer plate, an inner plate and a foaming layer. The outer plate is arranged on the outer side of the inner plate and defines a accommodating cavity between the outer plate and the inner plate. The foaming layer is filled in the accommodating cavity. The connection position of the inner plate and the outer plate forms a sealing interface. The sealing interface is arranged around the accommodating cavity. The exhaust assembly is connected to the case body and is suitable for connecting the accommodating cavity with the external space of the case body. The plurality of battery cells are arranged in the installation cavity of the battery case.

[0070] In the above-mentioned battery case, by arranging an exhaust assembly on the battery case and making it suitable for connecting the accommodating cavity of the battery case with the external space of the case body, the exhaust assembly can discharge the gas generated by the foaming layer in the accommodating cavity to the external space of the case body in time, avoiding the accumulation of these gases in the case body and causing deformation of the case body, which is beneficial to prolonging the service life of the battery case, thereby helping to prolong the service life of the battery device.

[0071] The battery device disclosed in the embodiment of the utility model can be used in electrical equipment that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. In addition to being used in vehicles, the battery device can also be used for, but not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecrafts, etc.

[0072] The power-consuming device disclosed in the embodiments of the utility model may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device is provided inside the vehicle, and the battery device may be provided at the bottom, head or tail of the vehicle. The battery device may be used to power the vehicle, for example, the battery device may be used as an operating power source for the vehicle. The vehicle may also include a controller and a motor, and the controller is used to control the battery device to power the motor, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the utility model, the battery device may be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0073] Reference below Figure 1-Figure 8 A battery device 200 and an electric device 1000 according to an embodiment of the present invention are described.

[0074] refer to Figure 1-Figure 3 In the first aspect, the utility model provides a battery device 200, which includes a battery case 100 and a battery cell assembly disposed in the battery case 100, wherein the battery cell assembly includes a plurality of battery cells. The battery case 100 includes: a case body and an exhaust assembly 3, wherein the case body encloses a mounting cavity and includes an outer plate 11, an inner plate and a foaming layer, wherein the outer plate 11 is disposed on the outer side of the inner plate and defines a receiving cavity 2 between the outer plate 11 and the inner plate, wherein the foaming layer is filled in the receiving cavity 2, wherein the connection position between the inner plate and the outer plate 11 forms a sealing interface 4, wherein the sealing interface 4 is disposed around the receiving cavity 2, wherein the exhaust assembly 3 is connected to the case body and is adapted to connect the receiving cavity 2 with the external space of the case body, and wherein the battery cell assembly is disposed in the mounting cavity.

[0075] Optionally, the outer plate 11, the inner plate and the foam layer together form at least part of the wall of the box body. For example, the walls of the box body are all formed by the outer plate 11, the inner plate and the foam layer; for example, part of the wall of the box body is formed by the outer plate 11, the inner plate and the foam layer; for example, the bottom wall of the box body is formed by the outer plate 11, the inner plate and the foam layer.

[0076] The connection position between the inner plate and the outer plate 11 forms a sealing interface 4, so that the accommodating cavity 2 has good sealing performance and is conducive to preventing the foaming material of the foaming layer in the accommodating cavity 2 from leaking.

[0077] The battery cell assembly is arranged in the installation cavity, and the box body supports and protects the battery cell assembly.

[0078] During the production or use of the battery device 200, the foaming layer in the battery case 100 will generate gas, and the accumulation of these gases in the accommodating chamber 2 of the case body will cause a pressure difference between the accommodating chamber 2 and the external space, causing the case body to be easily deformed. By providing an exhaust component 3 connecting the accommodating chamber 2 and the external space of the case body on the battery case 100, the exhaust component 3 can discharge these gases generated by the foaming layer from the accommodating chamber 2 to the external space in a timely manner to balance the air pressure of the accommodating chamber 2 and the external space. Optionally, the foaming layer can be formed by foaming polyurethane, silicone foam material, silicone foam material, etc.

[0079] In the above technical solution, by arranging the exhaust component 3 in the battery case 100 and making it suitable for connecting the accommodating cavity 2 of the battery case 100 with the external space of the case body, the exhaust component 3 can discharge the gas generated by the foaming layer in the accommodating cavity 2 to the external space of the case body in time, avoiding the accumulation of these gases in the case body and causing deformation of the case body, which is beneficial to prolonging the service life of the battery case 100, thereby helping to prolong the service life of the battery device 200.

[0080] refer to Figure 1-Figure 3 In some embodiments, the exhaust assembly 3 includes an exhaust pipe 31, one end of the exhaust pipe 31 is connected to the box body and communicated with the accommodating cavity 2, and the other end of the exhaust pipe 31 is located outside the box body and communicated with the external space of the box body.

[0081] In the above technical solution, the exhaust assembly 3 includes the exhaust pipe 31, the structure of the exhaust pipe 31 is simple, and the exhaust pipe 31 can guide the gas to effectively guide the gas in the accommodating chamber 2 to the external space of the box body. Figure 4 In some embodiments, the exhaust pipe 31 extends in a curve.

[0082] In the above technical solution, by extending the exhaust pipe 31 in a curve, the structure of the exhaust pipe 31 can be flexibly arranged to avoid interfering with other components of the battery box 100 , and is conducive to reducing the noise generated by the airflow in the exhaust pipe 31 .

[0083] refer to Figure 4-Figure 6 In some embodiments, the exhaust assembly 3 further includes an exhaust valve 32, which is disposed on the exhaust pipe 31 to control the on-off of the exhaust pipe 31. For example, if the foaming layer in the accommodating chamber 2 generates gas so that the air pressure in the accommodating chamber 2 is greater than the air pressure in the external space, the exhaust valve 32 automatically opens the exhaust pipe 31, and the gas in the accommodating chamber 2 can be discharged to the external space through the exhaust valve 32; if the air pressure in the accommodating chamber 2 is balanced with the air pressure in the external space, the exhaust valve 32 automatically closes the exhaust pipe 31.

[0084] Optionally, the exhaust valve 32 may be an automatic valve; optionally, the exhaust valve 32 may be a control valve, for example, the exhaust valve 32 may be periodically controlled to open to exhaust the gas in the accommodating chamber 2, and then the exhaust valve 32 may be controlled to close after the gas is exhausted.

[0085] In the above technical solution, by setting the exhaust valve 32, the exhaust pipe 31 can reduce or prevent external moisture or water vapor from entering the battery case 100 through the exhaust pipe 31; and when gas is generated in the accommodating chamber 2 of the battery case 100, the exhaust valve 32 automatically opens under the pressure difference between the accommodating chamber 2 and the external space, releasing excess gas and reducing the risk of internal pressure accumulation, thereby avoiding deformation of the case body due to excessive pressure in the case body.

[0086] refer to Figure 3 In some embodiments, the exhaust valve 32 is disposed at the other end of the exhaust pipe 31. Optionally, the exhaust valve 32 may be sleeved on the other end of the exhaust pipe 31; optionally, the exhaust valve 32 may be detachably connected to the other end of the exhaust pipe 31; optionally, the exhaust valve 32 may be bonded to the other end of the exhaust pipe 31.

[0087] In the above technical solution, the exhaust valve 32 is arranged at the other end of the exhaust pipe 31, and the other end of the exhaust pipe 31 is located outside the box body, which makes it easy to inspect and maintain it. For example, the exhaust assembly 3 can be inspected or cleaned without completely disassembling the battery box.

[0088] refer to Figure 4-Figure 6 In some embodiments, the exhaust valve 32 is a one-way valve.

[0089] In the above technical solution, by making the exhaust valve 32 a one-way valve, the one-way valve can prevent external air or pollutants from flowing back into the battery case 100 through the exhaust pipe 31, thereby protecting the battery from external pollution; and when the internal pressure of the accommodating cavity 2 of the battery case 100 is higher than the atmospheric pressure of the external space, the one-way valve opens to allow excess gas to be discharged; when the internal and external pressures are balanced, the valve closes, which is also conducive to stabilizing the pressure inside the battery case 100.

[0090] refer to Figure 1-Figure 2 In some embodiments, the pipe opening at one end of the exhaust pipe 31 connected to the box body is located in the accommodating cavity 2.

[0091] In the above technical solution, the pipe opening at one end of the exhaust pipe 31 connected to the box body is located in the accommodating chamber 2. In this way, there is no need to separately set up a gas guide structure for connecting the pipe opening of the exhaust pipe 31 and the accommodating chamber 2, which is beneficial to simplifying the overall structural design of the battery box 100, and the exhaust pipe 31 can directly discharge the gas generated by the foaming layer from the accommodating chamber 2, which can better reduce the gas pressure in the accommodating chamber.

[0092] refer to Figure 1-Figure 4 In some embodiments, the battery box 100 further includes a fixing plate 5, the fixing plate 5 is fixedly clamped between the inner plate and the outer plate 11, a first fixing hole 51 is formed on the fixing plate 5, and the exhaust pipe 31 is passed through the first fixing hole 51. Optionally, the exhaust pipe 31 is interference fit with the first fixing hole 51.

[0093] In the above technical solution, the inner plate and the outer plate 11 provide structural support for the fixed plate 5 , and the fixed plate 5 is stably installed. The fixed plate 5 provides structural support for the exhaust pipe 31 through the first fixing hole 51 , which is beneficial to improving the installation stability of the exhaust pipe 31 .

[0094] For example, the production process of the battery case 100 may include the following assembly process: first, the exhaust pipe 31 is passed through the fixing plate 5; then, the fixing plate 5 is installed on the inner plate; then, the outer plate 11 is fixedly connected to the inner plate and the fixing plate 5 is clamped between the inner plate and the outer plate 11.

[0095] refer to Figure 1-Figure 3 In some embodiments, the battery case 100 also includes a heat exchange component 6, which is fixed to the outer plate 11, and the heat exchange component 6 is thermally connected to the inner plate, the inner plate is a heat conductive plate, and at least a portion of the heat exchange component 6 is disposed in the accommodating cavity 2.

[0096] Among them, at least part of the heat exchange component 6 is arranged in the accommodating chamber 2, which may include the following situations: for example, part of the heat exchange component 6 is arranged in the accommodating chamber 2; for another example, the heat exchange component 6 is arranged in the accommodating chamber 2 as a whole.

[0097] In the above technical solution, the outer plate 11 provides stable support for the heat exchange component 6, and the heat exchange component 6 makes full use of the space in the accommodating cavity 2. The battery box 100 has a compact structure. When the battery box 100 is applied to the battery device 200, the heat exchange component 6 can exchange heat with the battery cells in the battery box 100 through the inner plate in a timely manner to ensure the normal operation of the battery device 200.

[0098] refer to Figure 1-Figure 3 In some embodiments, the heat exchange assembly 6 includes a connected heat exchange unit 61 and a collecting piece 62, the heat exchange unit 61 has a heat exchange channel, the collecting piece 62 has a liquid inlet 621 and a liquid outlet 622 connected to the heat exchange channel, at least a portion of the heat exchange unit 61 is located in the accommodating chamber 2, and the collecting piece 62 is located outside the accommodating chamber 2.

[0099] Among them, at least part of the heat exchange unit 61 is located in the accommodating chamber 2, which may include the following situations: for example, part of the heat exchange unit 61 is located in the accommodating chamber 2; for another example, the heat exchange unit 61 is located in the accommodating chamber 2 as a whole.

[0100] Optionally, the heat exchange unit 61 may be a heat exchange tube, such as a water-cooled tube; optionally, the heat exchange unit 61 may also be a heat exchange plate, such as a water-cooled plate.

[0101] Optionally, there may be multiple heat exchange units 61 , and the liquid inlets 621 and liquid outlets 622 of the multiple heat exchange units 61 are integrated on the current collecting member 62 .

[0102] In the above technical solution, by locating the collecting member 62 having the liquid inlet 621 and the liquid outlet 622 outside the accommodating chamber 2, the connection operation between the external pipeline of the coolant and the collecting member 62 is facilitated, and the inspection and maintenance thereof are facilitated.

[0103] refer to Figure 3 In some embodiments, the heat exchange assembly 6 further includes a heat exchange support plate 63 , the heat exchange unit 61 is a heat exchange tube and is disposed on the heat exchange support plate 63 , and the heat exchange support plate 63 is fixed to the outer plate 11 .

[0104] The connection position between the inner plate and the outer plate 11 forms a sealing interface 4, and the sealing interface 4 is arranged around the accommodating cavity 2. The outer edge of the heat exchange support plate 63 forms a sealing edge 631. The outer edge of the outer plate 11 forms a first connection portion 111, and a second connection portion is formed on the inner plate. The sealing edge 631 is located between the first connection portion 111 and the second connection portion, and a first sealing interface is formed between the sealing edge 631 and the first connection portion 111, and a second sealing interface is formed between the sealing edge 631 and the second connection portion. The sealing interface 4 includes a first sealing interface and a second sealing interface.

[0105] Optionally, the heat exchange tube is a serpentine tube. Optionally, there are multiple heat exchange tubes, and the multiple heat exchange tubes are arranged in parallel on the heat exchange support plate 63.

[0106] In the above technical solution, the heat exchange support plate 63 provides support for the heat exchange tubes, and if there are multiple heat exchange tubes, it is convenient to fix the multiple heat exchange tubes on the heat exchange support plate 63 for modular installation, which is beneficial to improving the installation production efficiency of the battery box 100; by forming a sealing edge 631 on the outer edge of the heat exchange support plate 63, it is beneficial to the stable installation of the heat exchange assembly 6 and to improve the sealing performance of the battery box 100.

[0107] refer to Figure 1-Figure 4 In some embodiments, the battery case 100 further includes a fixing plate 5 , which is fixedly clamped between the inner plate and the outer plate 11 , and the current collecting member 62 is located outside the accommodating cavity 2 , and a first fixing hole 51 and a second fixing hole 52 are formed on the fixing plate 5 .

[0108] The heat exchange unit 61 is a heat exchange tube having a connecting pipe section 611 located outside the accommodating chamber 2 . The connecting pipe section 611 is passed through the second fixing hole 52 and connected to the collecting member 62 . The exhaust component 3 is passed through the first fixing hole 51 .

[0109] Optionally, at least two second fixing holes 52 arranged in parallel are formed on the fixing plate 5, and the first fixing hole 51 is located on one side of the second fixing hole 52 along the length direction of the fixing plate 5. The connecting pipe section 611 includes a first pipe section and a second pipe section, the first pipe section is connected between the heat exchange unit 61 and the liquid inlet 621, and the second pipe section is connected between the heat exchange unit 61 and the liquid outlet 622; wherein, the first pipe section and the second pipe section are both inserted into the second fixing hole 52.

[0110] In the above technical solution, by setting a fixing plate 5 and forming a first fixing hole 51 and a second fixing hole 52 on the fixing plate 5, the fixing plate 5 can be used to seal the accommodating chamber 2 and avoid hindering the connecting pipe section 611 and the exhaust assembly 3 from extending to the external space of the accommodating chamber 2. At the same time, the fixing plate 5 can form an effective fixed support for the connecting pipe section 611 and the exhaust assembly 3, which is beneficial to improve the installation stability and reliability thereof, and avoid the connecting pipe section 611 and the exhaust assembly 3 from shaking drastically during the use of the battery box 100.

[0111] refer to Figure 1-Figure 2 In some embodiments, the outer panel 11 includes a bottom guard plate, the inner panel includes a bottom plate, and at least a portion of the accommodating cavity 2 is defined between the bottom plate and the bottom guard plate.

[0112] Among them, at least part of the accommodating cavity 2 is defined between the bottom plate and the bottom guard plate, which may include the following situations:

[0113] For example, part of the accommodating cavity 2 is defined between the bottom plate and the bottom guard plate; for another example, the entire accommodating cavity 2 is defined between the bottom plate and the bottom guard plate.

[0114] In the above technical solution, by defining at least a portion of the accommodating cavity 2 between the bottom plate and the bottom protective plate of the battery box 100, a foaming layer is filled between the bottom plate and the bottom protective plate, which is beneficial to improving the impact resistance, sealing and other properties of the bottom plate and the bottom protective plate. When the battery box 100 is applied to the battery device 200, it is beneficial to improve the protective performance of the bottom plate and the bottom protective plate on the battery cells and the like in the battery box 100.

[0115] Next, we will refer to Figure 1-Figure 7 The battery device 200 according to some embodiments of the present invention is described.

[0116] refer to Figure 1-Figure 7 In this embodiment, the battery device 200 includes a battery case 100 and a battery cell assembly disposed in the battery case 100, and the battery cell assembly includes a plurality of battery cells.

[0117] The battery case 100 includes a case body and an exhaust assembly 3. The case body encloses an installation cavity and includes an outer plate 11, an inner plate and a foam layer. The outer plate 11 is arranged on the outer side of the inner plate and defines a accommodating cavity 2 between the outer plate 11 and the inner plate. The foam layer is filled in the accommodating cavity 2. The exhaust assembly 3 is connected to the case body, and the exhaust assembly 3 connects the accommodating cavity 2 with the external space of the case body. The battery cell assembly is arranged in the installation cavity.

[0118] The outer plate 11 includes a bottom guard plate, and the inner plate includes a bottom plate, and at least a portion of the accommodating cavity 2 is defined between the bottom plate and the bottom guard plate.

[0119] The exhaust assembly 3 includes an exhaust pipe 31 and an exhaust valve 32. The exhaust pipe 31 extends in a curve, and the exhaust valve 32 is a one-way valve. One end of the exhaust pipe 31 is connected to the box body and communicates with the accommodating chamber 2. The pipe opening of the end of the exhaust pipe 31 connected to the box body is located in the accommodating chamber 2. The other end of the exhaust pipe 31 is located outside the box body and communicates with the external space of the box body. The exhaust valve 32 is arranged at the other end of the exhaust pipe 31, and the exhaust valve 32 is used to control the on and off of the exhaust pipe 31.

[0120] The battery case 100 also includes a heat exchange assembly 6, which includes a connected heat exchange unit 61 and a current collector 62. The heat exchange unit 61 has a heat exchange flow channel, and the current collector 62 has a liquid inlet 621 and a liquid outlet 622 connected to the heat exchange flow channel. The heat exchange assembly 6 is fixed to the outer plate 11 and is heat-conductingly connected to the inner plate, and the inner plate is a heat-conducting plate. Part of the heat exchange unit 61 is located in the accommodating chamber 2, and the current collector 62 is located outside the accommodating chamber 2. The heat exchange unit 61 is a heat exchange tube, and the heat exchange tube has a connecting pipe section 611 located outside the accommodating chamber 2, and one end of the connecting pipe section 611 is connected to the current collector 62.

[0121] The battery box 100 further includes a fixing plate 5, which is clamped between the inner plate and the outer plate 11, and the current collector 62 is located outside the accommodating cavity 2. The fixing plate 5 is formed with a first fixing hole 51 and a second fixing hole 52, the exhaust pipe 31 is passed through the first fixing hole 51, and the connecting pipe section 611 is passed through the second fixing hole 52 and connected to the current collector 62.

[0122] The heat exchange assembly 6 also includes a heat exchange support plate 63. The heat exchange unit 61 is a heat exchange tube and is arranged on the heat exchange support plate 63. The heat exchange support plate 63 is fixed to the outer plate 11. The connection position between the inner plate and the outer plate 11 forms a sealing interface 4. The sealing interface 4 is arranged around the accommodating cavity 2. The outer edge of the heat exchange support plate 63 forms a sealing edge 631. The outer edge of the inner plate is formed with a first connecting portion 111. The outer plate 11 is formed with a second connecting portion. The sealing edge 631 is located between the first connecting portion 111 and the second connecting portion, and a first sealing interface is formed between the sealing edge 631 and the first connecting portion 111, and a second sealing interface is formed between the sealing edge 631 and the second connecting portion. The sealing interface 4 includes a first sealing interface and a second sealing interface.

[0123] refer to Figure 8 In a second aspect, the utility model provides an electrical device 1000 , and the electrical device 1000 includes the battery device 200 mentioned above.

[0124] In the above technical solution, by setting the above-mentioned battery device 200, the battery box 100 of the battery device 200 is provided with an exhaust component 3 suitable for connecting the accommodating cavity 2 with the external space. The exhaust component 3 can discharge the gas generated by the foaming layer in the accommodating cavity 2 to the external space of the box body in time, so as to avoid the accumulation of these gases in the box body and cause deformation of the box body, which is beneficial to prolonging the service life of the battery box 100, thereby helping to improve the service life of the battery device 200.

[0125] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0126] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: A battery box, comprising a box body and an exhaust assembly, wherein the box body encloses a mounting cavity and comprises an outer plate, an inner plate and a foam layer, wherein the outer plate is arranged on the outer side of the inner plate and defines an accommodating cavity between the outer plate and the inner plate, wherein the foam layer is filled in the accommodating cavity, wherein a sealing interface is formed at a connection position between the inner plate and the outer plate, wherein the sealing interface is arranged around the accommodating cavity, and wherein the exhaust assembly is connected to the box body and is adapted to connect the accommodating cavity with an external space of the box body; The battery cell assembly is arranged in the installation cavity and includes a plurality of battery cells.

2. The battery device according to claim 1, characterized in that: The exhaust assembly comprises an exhaust pipe, one end of which is connected to the box body and communicated with the accommodating cavity, and the other end of which is located outside the box body and communicated with the external space of the box body.

3. The battery device according to claim 2, characterized in that: The exhaust pipe extends in a curve.

4. The battery device according to claim 2, characterized in that: The exhaust component also includes an exhaust valve, which is arranged on the exhaust pipe to control the on-off of the exhaust pipe.

5. The battery device according to claim 4, characterized in that: The exhaust valve is arranged at the other end of the exhaust pipe.

6. The battery device according to claim 4, characterized in that: The exhaust valve is a one-way valve.

7. The battery device according to claim 2, characterized in that: The pipe opening of one end of the exhaust pipe connected to the box body is located in the accommodating cavity.

8. The battery device according to claim 2, characterized in that: It also includes a fixing plate, which is fixedly clamped between the inner plate and the outer plate. A first fixing hole is formed on the fixing plate, and the exhaust pipe is passed through the first fixing hole.

9. The battery device according to claim 1, characterized in that: It also includes a heat exchange component, which is fixed to the outer plate and thermally connected to the inner plate. The inner plate is a heat conductive plate. At least part of the heat exchange component is disposed in the accommodating cavity.

10. The battery device according to claim 9, characterized in that: The heat exchange assembly includes a connected heat exchange unit and a collecting member, the heat exchange unit has a heat exchange channel, the collecting member has a liquid inlet and a liquid outlet connected to the heat exchange channel, at least part of the heat exchange unit is located in the accommodating cavity, and the collecting member is located outside the accommodating cavity.

11. The battery device according to claim 10, characterized in that: The heat exchange assembly further includes a heat exchange support plate, the heat exchange unit is a heat exchange tube and is arranged on the heat exchange support plate, and the heat exchange support plate is fixed to the outer plate; The connection position between the inner plate and the outer plate forms a sealing interface, and the sealing interface is arranged around the accommodating cavity. The outer edge of the heat exchange support plate forms a sealing edge. The outer edge of the outer plate forms a first connecting portion, and the inner plate is formed with a second connecting portion. The sealing edge is located between the first connecting portion and the second connecting portion, and a first sealing interface is formed between the sealing edge and the first connecting portion, and a second sealing interface is formed between the sealing edge and the second connecting portion. The sealing interface includes the first sealing interface and the second sealing interface.

12. The battery device according to claim 10, characterized in that: It also includes a fixing plate, the fixing plate is fixedly clamped between the inner plate and the outer plate, the current collecting member is located outside the accommodating cavity, and a first fixing hole and a second fixing hole are formed on the fixing plate; The heat exchange unit is a heat exchange tube, and the heat exchange tube has a connecting pipe section located outside the accommodating cavity. The connecting pipe section is passed through the second fixing hole and connected to the collecting member, and the exhaust component is passed through the first fixing hole.

13. The battery device according to any one of claims 1 to 12, characterized in that: The outer plate includes a bottom guard plate, the inner plate includes a bottom plate, and at least a portion of the accommodating cavity is defined between the bottom plate and the bottom guard plate.

14. An electrical device, characterized in that: include: A battery device according to any one of claims 1 to 13.

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