Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a battery box body, the battery box body comprises a box body main body, the box body main body is provided with an accommodating space capable of accommodating at least one part of a battery monomer, the box body main body comprises a bottom plate, and the bottom plate is provided with a first accommodating groove; the heat exchange device is arranged on the box body and comprises a heat exchange pipe, the heat exchange pipe is located in the first containing groove, the surface of the side, close to the containing space, of the heat exchange pipe is flush with the surface of the side, close to the containing space, of the bottom plate, the bottom plate and the heat exchange pipe are suitable for being in contact fit with the single batteries, and the heat exchange device and the box body are integrally formed. Therefore, the arrangement of the heat exchange tubes does not occupy the accommodating space of the battery monomers, and one side of each heat exchange tube is in direct contact with the battery monomers, so that the battery monomers are cooled or heated, the heat exchange effect is ensured to a certain extent, and the other side of each heat exchange tube is wrapped by the bottom plate, so that the heat preservation performance is ensured to a certain extent; and locking points are reduced, and the assembly process is simplified.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] In the related art, a cold plate is assembled in the battery box. The cold plate is usually formed by stamping and brazing, and multiple locking points are set on the box for fixation. The installation of the cold plate occupies the space inside the battery box and affects the energy density of the battery. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device that can alleviate the problem of reduced battery energy density.

[0005] In the first aspect, the present application provides a battery device including a battery case, the battery case including: a case body, the case body having a storage space that can accommodate at least a portion of a battery cell, the case body including a bottom plate, a first storage groove being provided on the bottom plate; a heat exchange device, the heat exchange device being provided on the case body and including a heat exchange tube, the heat exchange tube being located in the first storage groove and a side surface of the heat exchange tube close to the storage space being flush with a side surface of the bottom plate close to the storage space, the bottom plate and the heat exchange tube being suitable for contacting and cooperating with the battery cell, and the heat exchange device being integrally formed with the case body.

[0006] In the technical solution of the embodiment of the present application, a first receiving groove is provided on the bottom plate, and the heat exchange tube is installed in the first receiving groove, so that the heat exchange tube does not protrude from the outer surface of the bottom plate. The arrangement of the heat exchange tube does not occupy the storage space of the battery cell. At the same time, one side of the heat exchange tube can directly contact the battery cell, thereby cooling or heating the battery cell, ensuring the heat exchange effect to a certain extent. Moreover, the other side of the heat exchange tube can ensure the thermal insulation performance to a certain extent under the coverage of the bottom plate. In addition, since the heat exchange tube is directly located in the first receiving groove, the locking points provided on the box body can be reduced, simplifying the assembly process. The box body can be integrally formed with the heat exchange device through a process such as integrated molding or injection molding, thereby embedding the heat exchange device in the box body, improving the bonding strength between the heat exchange device and the box body, and ensuring the sealing and stability of the battery box.

[0007] In some embodiments, the heat exchange device further includes fins disposed on the outside of the heat exchange tubes. The bottom plate includes a retaining groove communicating with the first receiving groove, and the fins correspond to the retaining grooves. In the above technical solution, the cooperation between the fins and the retaining grooves can increase the contact surface between the heat exchange device and the main body of the battery case, thereby improving the bonding strength between the two and enhancing the stability of the entire battery case.

[0008] In some embodiments, one of the fins and the bottom plate is provided with a positioning hole, and the other of the fins and the bottom plate has a positioning post that is inserted into the positioning hole. In the above technical solution, when the heat exchange device and the battery case body are integrated into a single piece, the positioning post is located in the positioning hole, thereby further strengthening the connection between the heat exchange device and the battery case body and improving the stability of the entire battery case.

[0009] In some embodiments, the positioning holes include a plurality of positioning holes, and the plurality of positioning holes are spaced apart along the extension direction of the heat exchange tube. In the above technical solution, the bonding strength between the heat exchange device and the box body is further improved, thereby improving the stability of the entire battery box.

[0010] In some embodiments, the fins are provided on opposite sides of the heat exchange tube in a direction perpendicular to the extension direction of the heat exchange tube, and the fins extend along the extension direction of the heat exchange tube. In the above technical solution, the bonding strength between the heat exchange device and the box body is improved, thereby improving the stability of the entire battery box.

[0011] In some embodiments, the heat exchange device further includes a connector connected to the heat exchange tube, a portion of the connector being located outside the housing, and the portion of the connector located outside the housing having a liquid inlet and / or a liquid outlet. In the above technical solution, the heat exchange device is easily connected to external pipelines.

[0012] In some embodiments, the connector is plate-shaped, and the base plate further includes a second receiving groove connected to the first receiving groove. A portion of the connector is disposed within the second receiving groove and does not protrude from the side surface of the base plate adjacent to the battery cell. In the above technical solution, when the heat exchange device and the main body of the box are integrated into a single piece, the connector will not interfere with the battery cell, and the connector can also contact and cooperate with the battery cell. The connector can also absorb heat from the battery cell, thereby dissipating heat from the battery cell.

[0013] In some embodiments, the housing body further includes side panels that surround the outside of the bottom panel and have through-holes. The connectors extend through the through-holes and are sealed to the side panels. In the above technical solution, the connectors can partially extend into the inside of the side panels to connect to the heat exchange tubes, while a portion of the connectors can be located outside the side panels to facilitate connection to external pipelines. The connectors are sealed to the side panels to ensure the sealing of the overall structure.

[0014] In some embodiments, the connector connects the two ends of the heat exchange tube and defines a liquid inlet cavity and a liquid outlet cavity that communicate with the flow channel of the heat exchange tube. The liquid inlet communicates with the liquid inlet cavity, and the liquid outlet communicates with the liquid outlet cavity. In the above technical solution, the heat exchange tube is connected via a connector, and a circulating heat exchange medium is introduced into the heat exchange tube, thereby improving the cooling effect. The overall structure of the heat exchange device is simple, and the heat exchange liquid can enter and exit from the same side of the box body, which facilitates the connection of the heat exchange device.

[0015] In some embodiments, the heat exchange tube comprises multiple segments, which are sequentially connected, with adjacent segments extending in different directions. In the above technical solution, by providing multiple tubes, the length of the heat exchange tube is increased, thereby increasing the contact area with the battery cells and improving the heat exchange effect. Furthermore, by providing multiple tubes extending in different directions, the contact area between the heat exchange tube and the main body of the battery box is increased, thereby increasing the reliability of the connection and improving the stability of the entire battery box.

[0016] In some embodiments, a heat exchange tube is provided with a separator extending along the tube's extension direction to divide the flow channel within the tube into multiple sub-channels. In this technical solution, the provision of multiple separators can, on the one hand, increase the structural strength of the heat exchange tube and improve its service life; on the other hand, it can increase the contact area between the heat exchange medium and the tube wall, thereby improving heat transfer efficiency. Each sub-channel can function as an independent heat exchange unit, helping to more evenly distribute heat.

[0017] In some embodiments, the heat exchange device has a higher thermal conductivity than the main body of the battery. In the above technical solution, the heat exchange device can absorb heat from the battery cells and remove the heat from the battery cells through the heat exchange medium within the heat exchange device. At the same time, the low thermal conductivity of the main body of the battery box can ensure that the battery box remains warm in low-temperature environments.

[0018] In some embodiments, the battery case is made of plastic. In the above technical solution, the use of plastic facilitates the integral injection molding of the battery case and the heat exchange device. Plastics are low-cost and can reduce the thermal conductivity of the battery case, thereby ensuring the battery case maintains its heat preservation performance in low-temperature environments.

[0019] In some embodiments, the heat exchange device is a metal part or a plastic part. In the above technical solution, the heat exchange device is made of metal to improve the thermal conductivity, and the heat exchange device is made of plastic to reduce the cost.

[0020] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiment, and the battery is used to provide electrical energy.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0023] Figure 1 is a schematic diagram of an electrical device in the related art;

[0024] Figure 2 A schematic diagram of a battery in the related art;

[0025] Figure 3 A schematic diagram of a battery box provided in some embodiments of the present application;

[0026] Figure 4 A top view of a battery box provided for some embodiments of the present application;

[0027] Figure 5 For the Figure 4 Cross-sectional view along line AA;

[0028] Figure 6 for Figure 5 The middle circle shows an enlarged view of B;

[0029] Figure 7 A schematic diagram of a heat exchange device provided in some embodiments of the present application;

[0030] Figure 8 for Figure 7 The middle circle shows an enlarged view of C.

[0031] Reference numerals:

[0032] Battery box 1000, power device 2000, battery cell 200,

[0033] Battery case 100, first part 110, second part 120,

[0034] Box body 10, accommodating space 101, bottom plate 11, first accommodating groove 111, limiting groove 112, second accommodating groove 114, side plate 12,

[0035] Heat exchange device 20 , heat exchange tube 21 , tube section 211 , partition 212 , fin 22 , positioning hole 221 , connector 23 , liquid inlet 231 , liquid outlet 232 , joint 24 . DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0038] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0040] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0041] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0042] The term "plurality" used in this application refers to two or more (including two).

[0043] In this application, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery may include a battery casing that encloses one or more battery cells or multiple battery modules. The battery casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0044] Battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the present application does not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the present application does not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the present application does not limit this.

[0045] Currently, market developments indicate that batteries are becoming increasingly widely used. Batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application of power batteries continues to expand, market demand is also growing.

[0046] In some electrical devices, a battery device is used for power supply. The battery device includes a battery case and battery cells arranged in the battery case. The battery cells are installed in the storage space of the battery case. Therefore, heat is generated during the operation of the battery cells. A heat exchange device is usually provided in the battery case, which can take away the heat generated by the operation of the battery cells by passing a heat exchange medium, alleviate the heating condition of the battery cells, and reduce the impact of the heat on the life and performance of the battery. The heat exchange device is arranged in the storage space, occupying a part of the space of the battery cells, thereby causing a reduction in the energy density of the battery.

[0047] Based on this, the present application proposes a battery device, including a battery case, the battery case including: a case body, the case body having a storage space that can accommodate at least a part of the battery cell, the case body including a bottom plate, and a first storage groove provided on the bottom plate; a heat exchange device, the heat exchange device is provided on the case body and includes a heat exchange tube, the heat exchange tube is located in the first storage groove and the side surface of the heat exchange tube close to the storage space is flush with the side surface of the bottom plate close to the storage space, and the bottom plate and the heat exchange tube are suitable for contacting and cooperating with the battery cell.

[0048] In the technical solution of the embodiment of the present application, a first accommodating groove is provided on the bottom plate, and the heat exchange tube is installed in the first accommodating groove, so that the heat exchange tube does not protrude from the outer surface of the bottom plate. The arrangement of the heat exchange tube does not occupy the accommodating space of the battery cell. At the same time, one side of the heat exchange tube can directly contact the battery cell, thereby realizing cooling or heating of the battery cell, ensuring the heat exchange effect to a certain extent, and the other side of the heat exchange tube can ensure the thermal insulation performance to a certain extent under the covering of the bottom plate; in addition, since the heat exchange tube is directly located in the first accommodating groove, the locking points provided on the box body can be reduced, thereby simplifying the assembly process.

[0049] The battery device 1000 disclosed in the embodiment of the present application can be used in, but not limited to, an electrical device 2000 such as a vehicle, a ship, or an aircraft. The power supply system of the electrical device 2000 can be composed of the battery device 1000 disclosed in the present application to improve the reliability of the electrical device 2000.

[0050] For example, the power-consuming device 2000 disclosed in the embodiments of the present application may be, but is not limited to, a vehicle, a mobile phone, a tablet, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. A vehicle may be a fuel vehicle, a gas vehicle, a new energy vehicle, or a rail vehicle, and a new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; a spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; an electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc.; an electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.

[0051] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of a vehicle provided in some embodiments of the present application. Battery device 1000 can be used to power the vehicle. Battery device 1000 can be arranged at the bottom, head, or tail of the vehicle. Battery device 1000 can be used to power the vehicle. For example, battery device 1000 can serve as the operating power source of the vehicle. The vehicle may also include a controller and a motor. The controller is used to control battery device 1000 to power the motor, for example, for starting, navigating, and operating power requirements of the vehicle during driving.

[0052] Please refer to Figure 2 , Figure 2 Schematic diagram of the structure of the battery provided in some embodiments of the present application.

[0053] The battery device 1000 includes a battery case 100 and a battery cell 200 . The battery case 100 includes a first portion 110 and a second portion 120 . The battery cell 200 is accommodated between the first portion 110 and the second portion 120 .

[0054] A battery cell 200 is the smallest unit that makes up a battery. For example, a battery cell 200 may include a housing, an electrode assembly, and an electrolyte. The housing is used to hold the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell 200 primarily operates by the movement of metal ions between the positive and negative electrode sheets. A battery device 1000 may include multiple battery cells 200, which can be connected in series, parallel, or in a hybrid configuration via electrical connectors.

[0055] Below, refer to the attached Figure 3-Figure 8 , describing a battery device 1000 according to an embodiment of the present application.

[0056] like Figure 3-Figure 8As shown, according to some embodiments of the present application, the battery device 1000 includes a battery case 100, and the battery case 100 includes: a case body 10 and a heat exchange device 20, the case body 10 has a receiving space 101 that can accommodate at least a portion of the battery cell 200, the case body 10 includes a bottom plate 11, and the bottom plate 11 is provided with a first receiving groove 111; the heat exchange device 20 is arranged on the case body 10, and the heat exchange device 20 includes a heat exchange tube 21, the heat exchange tube 21 is located in the first receiving groove 111, and the side surface of the heat exchange tube 21 close to the receiving space 101 is flush with the side surface of the bottom plate 11 close to the receiving space 101, and the bottom plate 11 and the heat exchange tube 21 are suitable for contacting and cooperating with the battery cell 200.

[0057] The battery device 1000 includes a battery case 100 and a battery cell 200 . The battery case 100 is used to accommodate the battery cell 200 .

[0058] The box body 10 is the main part of the battery box 100. The box body 10 defines a accommodating space 101. The battery cell 200 is arranged in its entirety in the accommodating space 101, or a portion of the battery cell 200 is arranged in the accommodating space 101. The box body 10 includes a bottom plate 11, and a first accommodating groove 111 is provided on the bottom plate 11.

[0059] Typically, the battery case 100 includes a first part 110 and a second part 120, and the second part 120 is arranged above the first part 110. The case body 10 can serve as the main part of the first part 110. In this case, the bottom plate 11 of the case body 10 can be the bottom structure of the first part 110. The case body 10 can also serve as the main part of the second part 120. In this case, the bottom plate 11 of the case body 10 can be the top part of the second part 120. The main parts of the first part 110 and the second part 120 can also adopt the above-mentioned case body 10.

[0060] The box body 10 further includes side panels 12 , which surround the outer periphery of the bottom panel 11 , and the side panels 12 together define a receiving space 101 .

[0061] A heat exchange medium is provided in the heat exchange device 20 . The heat exchange medium is usually an insulating medium, which may be air, deionized water, hydrocarbons, fluorinated liquid, refrigerant, etc.

[0062] The heat exchange device 20 includes a heat exchange tube 21. The heat exchange tube 21 has a flow channel. The heat exchange medium is located in the flow channel. Figure 4As shown, the heat exchange tube 21 is arranged in the first receiving groove 111, and the upper surface of the heat exchange tube 21 is flush with the upper surface of the bottom plate 11, that is, the side of the first receiving groove 111 facing the receiving space 101 is open, and the thickness of the heat exchange tube 21 is the same as the depth of the first receiving groove 111. Therefore, when the heat exchange device 20 and the box body 10 are integrated into an integral part, the bottom plate 11 and the heat exchange tube 21 can both contact and cooperate with the battery cell 200. The bottom plate 11 supports or protects the battery cell 200, and the heat exchange tube 21 can absorb the heat of the battery cell 200 and dissipate heat for the battery cell 200.

[0063] The heat exchange tube 21 may be installed in the first receiving groove 111 of the bottom plate 11 by plugging, bonding or the like, or may be integrally formed with the bottom plate 11 .

[0064] Since the heat exchange tube 21 is located in the first receiving groove 111 of the bottom plate 11, on the one hand, the heat exchange tube 21 overlaps with the bottom plate 11 in the thickness direction of the heat exchange tube 21, and the heat exchange tube 21 does not need to occupy additional space in this direction, thereby avoiding a reduction in the energy density of the battery device 1000 to a certain extent; on the other hand, a portion of the bottom plate 11 is located on the side of the heat exchange tube 21 away from the battery cell 100, thereby protecting the heat exchange tube 21. For example, the bottom plate 11 can be made of plastic or other materials with low thermal conductivity to achieve a heat preservation effect, that is, it can solve the problems of heat preservation and cooling at the same time, which is beneficial to improving the cruising range of the battery device 1000 when working in a cold environment.

[0065] In the technical solution of the embodiment of the present application, a first accommodating groove 111 is provided on the bottom plate 11, and the heat exchange tube 21 is installed in the first accommodating groove 111, so that the heat exchange tube 21 does not protrude from the outer surface of the bottom plate 11. The arrangement of the heat exchange tube 21 does not occupy the accommodating space of the battery cell 200. At the same time, one side of the heat exchange tube 21 can directly contact the battery cell 200, thereby realizing cooling or heating of the battery cell 200, ensuring the heat exchange effect to a certain extent, and the other side of the heat exchange tube 21 can ensure the thermal insulation performance to a certain extent under the covering of the bottom plate 11; in addition, since the heat exchange tube 21 is directly located in the first accommodating groove 111, the locking points provided on the box body 10 can be reduced, thereby simplifying the assembly process.

[0066] In some embodiments, the heat exchange device 20 is integrally formed with the box body 10 .

[0067] The heat exchanger 20 is placed as an integral insert in the mold of the housing 10. During the molding process, the material flows into the mold cavity, completely enveloping the heat exchange tube 21 within the housing. The upper surface of the heat exchange tube 21 is flush with the upper surface of the bottom of the housing 10.

[0068] As a result, the heat exchange tube 21 can directly contact the battery cell 200 inside the box body 10, greatly improving the heat exchange efficiency; the bottom of the heat exchange tube 21 is completely covered by the box body 10, and the low thermal conductivity of the box body 10 material itself can be used to ensure the heat preservation effect of the battery box 100 in a low temperature environment.

[0069] The box body 10 can be integrally formed with the heat exchange device 20 through an integrated molding or injection molding process, thereby embedding the heat exchange device 20 in the box body 10, improving the bonding strength between the heat exchange device 20 and the box body 10, and at the same time ensuring the sealing and stability of the battery box 100.

[0070] like Figure 6-Figure 8 As shown, in some embodiments, the heat exchange device 20 further includes fins 22, which are arranged on the outside of the heat exchange tube 21. The bottom plate 11 also has a limiting groove 112 connected to the first accommodating groove 111, and the fins 22 correspond to the limiting groove 112 in position.

[0071] like Figure 6-Figure 8 As shown, fins 22 are provided on the outside of the heat exchange tube 21, and the bottom plate 11 has a limiting groove 112. The fins 22 are located in the limiting groove 112. Through the cooperation between the fins 22 and the limiting groove 112, the contact surface between the heat exchange device 20 and the box body 10 can be increased, thereby improving the bonding force between the two and improving the stability of the entire battery box 100.

[0072] The fin 22 may be located on one side of the heat exchange tube 21 in the height direction (e.g. Figure 6 The fins 22 may also be located in the width direction of the heat exchange tube 21 (as shown in FIG. Figure 6 The fins 22 may extend along the length direction of the heat exchange tube 21 on one side or both sides (in the left and right directions as shown), and the fins 22 may be a whole fin or a plurality of fins along the length direction of the heat exchange tube 21.

[0073] like Figure 4 and Figure 8 As shown, in some embodiments, one of the fin 22 and the bottom plate 11 is provided with a positioning hole 221 , and the other of the fin 22 and the bottom plate 11 has a positioning post inserted into the positioning hole 221 .

[0074] like Figure 4 and Figure 8 As shown, the fin 22 is provided with a positioning hole 221, and the bottom plate 11 has a corresponding positioning column (not shown in the figure). When the heat exchange device 20 and the box body 10 are integrated into a whole, the positioning column is located in the positioning hole 221, thereby further improving the bonding strength between the heat exchange device 20 and the box body 10 and improving the stability of the entire battery box 100.

[0075] For example, the heat exchange device 20 and the box body 10 are integrally injection molded, and the box body 10 can be injection molded on the outside of the heat exchange device 20. During the molding process of the box body 10, the base material of the box body 10 covers the outside of the heat exchange tube 21. At the same time, the base material of the box body 10 can cover the outside of the fin 22. The base material of the box body 10 can also fill the positioning hole 221 of the fin 22, thereby improving the bonding strength between the heat exchange device 20 and the box body 10, and improving the stability of the entire battery box 100.

[0076] like Figure 8 As shown, in some embodiments, the positioning holes 221 include a plurality of positioning holes 221 , and the plurality of positioning holes 221 are arranged at intervals along the extension direction of the heat exchange tube 21 .

[0077] like Figure 8 As shown, the fin 22 is provided with a plurality of positioning holes 221, and correspondingly, the bottom plate 11 is provided with a plurality of positioning columns, and the plurality of positioning columns correspond one-to-one to the plurality of positioning holes 221, thereby further improving the bonding strength between the heat exchange device 20 and the box body 10 and improving the stability of the entire battery box 100.

[0078] like Figure 6-Figure 8 As shown, in some embodiments, fins 22 are respectively provided on opposite sides of the heat exchange tube 21 in a direction perpendicular to the extension direction of the heat exchange tube 21 , and the fins 22 extend along the extension direction of the heat exchange tube 21 .

[0079] like Figure 3-Figure 6 As shown, the width direction of the heat exchange tube 21 (as shown Figure 6 Fins 22 are provided on both sides (in the left and right directions shown in the figure), and the fins 22 can extend along the length direction of the heat exchange tube 21. Therefore, both sides of the width direction of the entire heat exchange tube 21 can be limited in the bottom plate 11 by the fins 22, thereby improving the bonding strength between the heat exchange device 20 and the box body 10, and improving the stability of the entire battery box 100.

[0080] like Figure 4 and Figure 7 As shown, in some embodiments, the heat exchange device 20 also includes a connector 23, which is connected to the heat exchange tube 21, a portion of the connector 23 is located outside the box body 10, and the portion of the connector 23 located outside the box body 10 has a liquid inlet 231 and / or a liquid outlet 232.

[0081] like Figure 7 As shown, the connector 23 is used to connect the two ends of the heat exchange tube 21. The connector 23 has a liquid inlet 231 and a liquid outlet 232, and the liquid inlet 231 and the liquid outlet 232 are located on the outside of the box body 10. The liquid inlet 231 and the liquid outlet 232 of the connector 23 are provided with joints 24, which facilitates connection with external pipelines.

[0082] Of course, the heat exchange device 20 may also be provided with two connectors 23 , each connector 23 being connected to one end of the heat exchange tube 21 , one connector 23 being provided with a liquid inlet 231 , and the other connector 23 being provided with a liquid outlet 232 .

[0083] By providing a connector 23 with an external liquid inlet and outlet, a portion of the heat exchange device 20 can be located inside the box body 10 and can fit the battery cell 200, while the other portion is located outside the box body 10, facilitating external pipe connection, so that the circulating heat exchange medium can flow into the heat exchange tube 21.

[0084] like Figure 4 As shown, in some embodiments, the connector 23 is plate-shaped, and the base plate 11 further has a second receiving groove 114 connected to the first receiving groove 111. A portion of the connector 23 is disposed in the second receiving groove 114, and the connector 23 does not protrude from the side surface of the base plate 11 close to the battery cell 200.

[0085] like Figure 3 and Figure 4 As shown, the base plate 11 has a second accommodating groove 114, and a portion of the connector 23 is arranged in the second accommodating groove 114. The upper surface of the connector 23 can be flush with the upper surface of the base plate 11, that is, the side of the second accommodating groove 114 facing the accommodating space 101 is open, and the thickness of the connector 23 is the same as the depth of the second accommodating groove 114. Therefore, when the heat exchange device 20 and the box body 10 are integrated into an integral part, the connector 23 will not interfere with the battery cell 200, and the connector 23 can also contact and cooperate with the battery cell 200. The connector 23 can also absorb the heat of the battery cell 200, thereby playing a role in dissipating heat for the battery cell 200.

[0086] Of course, the upper surface of the connecting member 23 may also be lower than the upper surface of the base plate 11, the thickness of the connecting member 23 may be less than the depth of the second receiving groove 114, or the second receiving groove 114 may also be a groove that is open only toward one side of the first receiving groove 111, and the connecting member 23 arranged in the second receiving groove 114 is completely wrapped in the base plate 11, thereby playing a role in limiting and protecting the heat exchange device 20.

[0087] like Figure 4 As shown, in some embodiments, the box body 10 further includes a side panel 12 , which surrounds the outside of the bottom panel 11 , has a through hole, and the connector 23 passes through the through hole, and the connector 23 is sealed to the side panel 12 .

[0088] Therefore, a portion of the connector 23 can extend into the inner side of the side plate 12 and connect to the heat exchange tube 21, and a portion of the connector 23 is located on the outer side of the side plate 12, which is convenient for connection with external pipelines. The connector 23 is sealed with the side plate 12 to ensure the sealing of the overall structure.

[0089] In some examples, the connecting member 23 has a first part, a second part, and a third part connected in sequence, the first part is located in the second receiving groove 114 of the bottom plate 11 inside the box body 10, the second part is located in the through hole of the side plate 12, and the third part extends out of the box body 10 and is located outside the box body 10, and the third part has a liquid inlet 231 and a liquid outlet 232.

[0090] In some embodiments, the connector 23 connects the two ends of the heat exchange tube 21, and the connector 23 defines a liquid inlet cavity and a liquid outlet cavity connected to the flow channel of the heat exchange tube 21, the liquid inlet 231 is connected to the liquid inlet cavity, and the liquid outlet 232 is connected to the liquid outlet cavity.

[0091] Thus, the heat exchange tube 21 is connected through a connector 23, and a circulating heat exchange medium is introduced into the heat exchange tube 21 to improve the cooling effect. The overall structure of the heat exchange device 20 is simple, and the heat exchange medium can enter and exit from the same side of the box body 10, which is convenient for connecting the heat exchange device 20.

[0092] like Figure 7 As shown, in some embodiments, the heat exchange tube 21 includes a plurality of tube segments 211 , the plurality of tube segments 211 are connected in sequence, and the extension directions of two adjacent tube segments 211 are different.

[0093] like Figure 3 and Figure 7 As shown, the heat exchange tube 21 is composed of multiple tubes 211 with different extension directions. Two adjacent tubes 211 are arranged vertically in the horizontal plane. Two adjacent tubes 211 can also be arranged at a certain angle. Multiple tubes 211 can form a square structure, a round structure, and a Z-shaped structure. By setting up multiple tubes 211, on the one hand, the length of the heat exchange tube 21 is increased, the contact area with the battery cell 200 is increased, and the heat exchange effect is improved. On the other hand, by setting up multiple tubes 211 with different extension directions, the contact area between the heat exchange tube 21 and the box body 10 can be increased, the reliability of the connection is increased, and the stability of the entire battery box 100 is improved.

[0094] like Figure 6 As shown, in some embodiments, a separator 212 is provided in the heat exchange tube 21 , and the separator 212 extends along the extension direction of the heat exchange tube 21 to separate the flow channel in the heat exchange tube 21 into a plurality of sub-flow channels.

[0095] like Figure 6 As shown, a plurality of partitions 212 are provided in the heat exchange tube 21. The sizes of the plurality of partitions 212 can be the same or different, thereby separating sub-channels of equal size or multiple sizes. The plurality of sub-channels can be connected to each other at the ends, or can be connected to the liquid inlet and the liquid outlet respectively, that is, the connection form of the plurality of sub-channels is not limited.

[0096] By providing multiple separators 212, the structural strength of the heat exchange tube 21 can be increased, thereby improving its service life. Furthermore, the contact area between the heat exchange medium and the tube wall can be increased, thereby improving heat transfer efficiency. Each sub-channel can function as an independent heat exchange unit, helping to more evenly distribute heat.

[0097] In some embodiments, the thermal conductivity of the heat exchange device 20 is higher than the thermal conductivity of the box body 10 .

[0098] Thus, the heat exchange device 20 can absorb the heat of the battery cell 100 and take away the heat of the battery cell 200 through the heat exchange medium in the heat exchange device 20. At the same time, the low thermal conductivity of the box body 10 can be used to ensure the heat preservation effect of the battery box 100 in a low temperature environment.

[0099] In some embodiments, the box body 10 is a plastic part.

[0100] The box body 10 can be a thermoplastic fiber-reinforced plastic part. The box body 10 can use thermoplastic resins such as PP (polypropylene), PA6 (polyamide 6 or nylon 6), PA66 (polyamide 66 or nylon 66), PBT (polybutylene terephthalate) as the matrix, and can be integrally formed with the heat exchange device 20 by molding or injection molding.

[0101] By using plastic parts, the box body 10 and the heat exchange device 20 can be easily integrated into an injection molding. The plastic parts have low cost and can reduce the thermal conductivity of the box body 10, thereby ensuring the heat preservation effect of the battery box 100 in a low temperature environment.

[0102] In some embodiments, the heat exchange device 20 is a metal part or a plastic part.

[0103] For example, the heat exchange device 20 is a metal part, the heat exchange tube 21 can be a metal tube, and the heat exchange device 20 can also be a thermoplastic plastic material part containing a high thermal conductivity material.

[0104] The heat exchange device can improve the thermal conductivity by using metal parts, and the heat exchange device can reduce costs by using plastic parts.

[0105] In a second aspect, the present application provides a battery device 1000 , which includes a battery cell 200 and the battery case 100 in the above embodiment.

[0106] In the above technical solution, the energy density of the battery device 1000 can be improved while reducing the difficulty of assembling the battery case 100 .

[0107] According to the third embodiment of the present application, the power device 2000 includes the battery device 1000 according to the second embodiment of the present application, and the battery device 1000 is used to provide power to the power device 2000. Therefore, by using the above-mentioned battery device 1000, the battery life of the power device 2000 is improved.

[0108] A battery device 1000 and a vehicle having the same according to a specific embodiment of the present application will be described below with reference to the accompanying drawings.

[0109] Please refer to Figure 1 The battery device 1000 is arranged at the bottom of the vehicle. The battery device 1000 includes a battery box 100 and a battery cell 200. The battery box 100 includes a box body 10 and a heat exchange device 20. The heat exchange device 20 includes a heat exchange tube 21, a fin 22 and a connector 23. The fins 22 are arranged on opposite sides of the extension direction of the heat exchange tube 21. The fins 22 are provided with a plurality of positioning holes 221. The connector 23 is connected to one side of the heat exchange tube 21, and the connector 23 has a liquid inlet 231 and a liquid outlet 232 connected to the flow channel of the heat exchange tube 21.

[0110] The box body 10 is integrally injection molded on the heat exchange device 20 through an injection molding process. The box body 10 formed by injection molding includes a bottom plate 11 and a side plate 12. The side plate 12 is arranged on the outer periphery of the bottom plate 11. A accommodating space 101 is defined between the bottom plate 11 and the side plate 12. The bottom plate 11 is defined with a first accommodating groove 111 and a second accommodating groove 114 open toward one side of the accommodating space 101. The bottom plate 11 also has a limiting groove 112, and the side plate 12 has a through hole. The heat exchange tube 21 is located in the first accommodating groove 111, and the fin 22 is located in the limiting groove 112. The bottom plate 11 also has a positioning column inserted into the positioning hole 221. A part of the connecting member 23 is located in the second accommodating groove 114, and a part of the connecting member 23 extends through the through hole to the outside of the box body 10.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: It comprises a battery box (100), wherein the battery box (100) comprises: A box body (10), the box body (10) having a receiving space (101) capable of receiving at least a portion of a battery cell, the box body (10) comprising a bottom plate (11), the bottom plate (11) being provided with a first receiving groove (111); A heat exchange device (20), the heat exchange device (20) being arranged on the box body (10) and comprising a heat exchange tube (21), the heat exchange tube (21) being located in the first receiving groove (111) and a side surface of the heat exchange tube (21) close to the receiving space (101) being flush with a side surface of the bottom plate (11) close to the receiving space (101), the bottom plate (11) and the heat exchange tube (21) being suitable for contacting and cooperating with the battery monomer, and the heat exchange device (20) and the box body (10) being integrally formed.

2. The battery device according to claim 1, characterized in that: The heat exchange device (20) further comprises a fin (22), wherein the fin (22) is arranged on the outside of the heat exchange tube (21), the bottom plate (11) has a limiting groove (112) connected to the first containing groove (111), and the fin (22) corresponds to the position of the limiting groove (112).

3. The battery device according to claim 2, characterized in that: One of the fin (22) and the bottom plate is provided with a positioning hole (221), and the other of the fin (22) and the bottom plate (11) has a positioning column inserted into the positioning hole (221).

4. The battery device according to claim 3, characterized in that: The positioning holes (221) include a plurality of positioning holes (221), and the plurality of positioning holes (221) are arranged at intervals along the extension direction of the heat exchange tube (21).

5. The battery device according to claim 2, characterized in that: In a direction perpendicular to the extension of the heat exchange tube (21), the fins (22) are respectively provided on two opposite sides of the heat exchange tube (21), and the fins (22) extend along the extension direction of the heat exchange tube (21).

6. The battery device according to claim 1, characterized in that: The heat exchange device (20) further comprises a connecting piece (23), the connecting piece (23) being connected to the heat exchange tube (21), a portion of the connecting piece (23) being located outside the box body (10), and the portion of the connecting piece (23) located outside the box body (10) having a liquid inlet (231) and / or a liquid outlet (232).

7. The battery device according to claim 6, characterized in that: The connecting member (23) is plate-shaped, and the bottom plate (11) further comprises a second accommodating groove (114) connected to the first accommodating groove (111), and a portion of the connecting member (23) is disposed in the second accommodating groove (114) and does not protrude from a side surface of the bottom plate (11) close to the battery cell.

8. The battery device according to claim 7, characterized in that: The box body (10) further comprises a side plate (12), the side plate (12) surrounding the outer side of the bottom plate (11), the side plate (12) having a through hole, the connecting member (23) passing through the through hole and being sealedly connected to the side plate (12).

9. The battery device according to claim 6, characterized in that: The connecting piece (23) connects the two ends of the heat exchange tube (21) and defines a liquid inlet cavity and a liquid outlet cavity which are in communication with the flow channel of the heat exchange tube (21); the liquid inlet (231) is in communication with the liquid inlet cavity, and the liquid outlet (232) is in communication with the liquid outlet cavity.

10. The battery device according to claim 1, characterized in that: The heat exchange tube (21) comprises a plurality of tube segments (211), the plurality of tube segments (211) are connected in sequence, and two adjacent tube segments (211) extend in different directions.

11. The battery device according to claim 1, characterized in that: A separator (212) is provided in the heat exchange tube (21), and the separator (212) extends along the extension direction of the heat exchange tube (21) to separate the flow channel in the heat exchange tube (21) into a plurality of sub-flow channels.

12. The battery device according to claim 1, characterized in that: The thermal conductivity of the heat exchange device (20) is higher than the thermal conductivity of the box body (10).

13. The battery device according to any one of claims 1 to 12, characterized in that: The box body (10) is a plastic part.

14. The battery device according to any one of claims 1 to 12, characterized in that: The heat exchange device (20) is a metal part or a plastic part.

15. An electrical device, characterized in that: It comprises a battery device according to any one of claims 1 to 14, wherein the battery device (1000) is used to provide electrical energy.

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