Battery pack

Abstract

The utility model discloses a battery pack. The battery pack has a first direction and comprises a plurality of single batteries; the heat management assemblies and the single batteries are alternately distributed along a first direction; the heat management assembly comprises a first heat management part, a second heat management part and a heat exchange pipe. The first heat management component is provided with a heat exchange cavity, and at least one side of the heat exchange cavity in the first direction is provided with an opening. The second heat management component is accommodated in the heat exchange cavity, is in heat conduction connection with the first heat management component, is in heat conduction connection with the single battery with the opening, and comprises a phase change material; the heat exchange pipe is arranged on the first heat management component and is in heat conduction connection with the first heat management component, and the heat exchange pipe is used for containing heat exchange fluid. In this way, heat management can be efficiently carried out on the single batteries.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack. Background Art

[0002] With the rapid development of automotive power batteries, improving battery power, achieving fast charging, and improving endurance are important development directions for power batteries. At the same time, due to the complex and changeable driving conditions of automobiles, excessively high or low battery temperatures will greatly affect battery capacity, service life, and safety. Therefore, thermal management of power batteries is of great significance. Utility Model Content

[0003] The present application provides a battery pack that can efficiently perform thermal management on single cells.

[0004] The present application provides a battery pack, which has a first direction, and the battery pack includes: a plurality of single cells; and a plurality of thermal management components, wherein the thermal management components and the single cells are distributed along the first direction; wherein the thermal management components include a first thermal management component, a second thermal management component and a heat exchange tube; the first thermal management component has a heat exchange cavity, and the heat exchange cavity has an opening on at least one side in the first direction; the second thermal management component is accommodated in the heat exchange cavity, and the second thermal management component is thermally connected to the first thermal management component, the second thermal management component is thermally connected to the single cell facing the opening, and the second thermal management component includes a phase change material; the heat exchange tube is arranged on the first thermal management component and thermally connected to the first thermal management component, and the heat exchange tube is used to accommodate a heat exchange fluid.

[0005] In one embodiment of the present application, a first heat management component is provided with a plurality of first heat exchange protrusions on the surface facing the heat exchange cavity, and a first heat exchange groove is formed between two adjacent first heat exchange protrusions; a second heat management component is provided with a plurality of second heat exchange protrusions on the surface facing the first heat management component, and a second heat exchange groove is formed between two adjacent second heat exchange protrusions; the first heat exchange protrusion is embedded in the second heat exchange groove, and the second heat exchange protrusion is embedded in the first heat exchange groove.

[0006] In one embodiment of the present application, the heat exchange tube is at least partially enclosed in the first heat management component.

[0007] In one embodiment of the present application, the heat exchange pipe includes an inlet pipe section, a heat exchange pipe section and an outlet pipe section which are connected in sequence; the first thermal management component has an installation channel inside, the heat exchange pipe section is installed in the installation channel, and the outer peripheral surface of the heat exchange pipe section is in contact with the first thermal management component.

[0008] In one embodiment of the present application, the battery pack also has a second direction and a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the battery pack includes a plurality of battery groups spaced apart along the first direction, and each battery group includes a plurality of single cells distributed along the second direction; wherein the heat exchange pipe segment includes a first sub-segment, a second sub-segment and a third sub-segment; the first sub-segment and the second sub-segment both extend along the second direction, and the first sub-segment and the second sub-segment are respectively located on both sides of the second thermal management component in the third direction; the third sub-segment is located on one side of the second thermal management component in the second direction, and the same side ends of the first sub-segment and the second sub-segment in the second direction are connected through the third sub-segment, the inlet pipe segment is connected to the end of the first sub-segment away from the third sub-segment, and the outlet pipe segment is connected to the end of the second sub-segment away from the third sub-segment.

[0009] In one embodiment of the present application, the battery pack further has a reference plane perpendicular to the first direction; wherein the orthographic projection of the single battery on the reference plane is within the orthographic projection of the second thermal management component on the reference plane.

[0010] In one embodiment of the present application, the battery pack further has a second direction and a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the battery pack includes a plurality of battery groups spaced apart along the first direction, and each battery group includes a plurality of single cells distributed along the second direction; wherein the size of the heat exchange chamber in the second direction is D1 mm, and the size of the battery group in the second direction is D2 mm, satisfying: D1≥D2; and / or the size of the single cell in the third direction is H1 mm, and the size of the heat exchange chamber in the third direction is H2 mm, satisfying: H1≤H2.

[0011] In one embodiment of the present application, thermal management components are respectively arranged on both sides of the single cell in the first direction; the battery pack also includes: a box body, including a base and a frame arranged around the outer periphery of the base, the base and the frame cooperate to enclose a receiving cavity for accommodating the single cell; wherein, a plurality of supporting protrusions are protruding from the surface of the base facing the single cell, the supporting protrusions are embedded between two adjacent groups of thermal management components, and the bottom of the single cell is supported on the supporting protrusions.

[0012] In one embodiment of the present application, the battery pack also includes: a box body, including a base, a frame and a cover body, the frame is arranged on one side of the base, the cover body covers the side of the frame away from the base, the base, the frame and the cover body cooperate to enclose a receiving cavity for accommodating a single cell; and a third thermal management component, arranged between the single cell and the base and / or between the single cell and the cover body, wherein the third thermal management component includes a phase change material.

[0013] In one embodiment of the present application, the battery pack further includes: a heat exchange plate, which is arranged between the third thermal management component and the base and / or between the third thermal management component and the cover.

[0014] In one embodiment of the present application, thermal management components are respectively provided on both sides of the single battery in the first direction, the third thermal management component is embedded between two adjacent groups of thermal management components, and the third thermal management component is in thermal contact with the single battery.

[0015] The beneficial effect of the present application is: Different from the prior art, the present application provides a battery pack. The thermal management component of the battery pack includes a first thermal management component, a second thermal management component and a heat exchange tube. The first thermal management component has a heat exchange cavity, the second thermal management component includes a phase change material, and the second thermal management component is accommodated in the heat exchange cavity and is thermally connected to the single battery facing the open side, and the first thermal management component is also thermally connected to the heat exchange tube. Among them, the second thermal management component is accommodated in the heat exchange cavity and is thermally connected to the first thermal management component, so that there is a larger heat exchange area between the first thermal management component and the second thermal management component, which is beneficial to improve the heat exchange efficiency, and thus can efficiently perform thermal management of the single battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the exploded structure of the first embodiment of the battery pack of the present application;

[0018] Figure 2 It is a structural schematic diagram of an embodiment of the arrangement of a single cell and a thermal management component of the present application;

[0019] Figure 3 It is a structural schematic diagram of an embodiment of a thermal management component of the present application;

[0020] Figure 4 yes Figure 3 A schematic cross-sectional view of the thermal management assembly shown;

[0021] Figure 5 is a side structural schematic diagram of the first embodiment of the battery pack of the present application;

[0022] Figure 6 is a schematic diagram of the exploded structure of the second embodiment of the battery pack of the present application;

[0023] Figure 7 is a structural schematic diagram of an embodiment of a first thermal management component of the present application;

[0024] Figure 8is a structural schematic diagram of an embodiment of a second thermal management component of the present application;

[0025] Fig. 9 is a side structural schematic diagram of a second embodiment of a battery pack of the present application;

[0026] Fig.10 It is a side structural schematic diagram of the third embodiment of the battery pack of the present application.

[0027] Description of reference numerals:

[0028] 10 battery pack; 11 housing; 111 base; 112 frame; 113 cover; 114 accommodating cavity; 12 supporting protrusion; 13 heat exchange plate; 20 single battery; 20a battery pack; 30 thermal management assembly; 31 first thermal management component; 311 heat exchange cavity; 313 first heat exchange protrusion; 314 first heat exchange groove; 315 installation channel; 32 second thermal management component; 321 second heat exchange protrusion; 322 second heat exchange groove; 33 heat exchange tube; 331 inlet tube section; 332 heat exchange tube section; 3321 first sub-tube section; 3322 second sub-tube section; 3323 third sub-tube section; 333 outlet tube section; 40 third thermal management component. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0030] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "stacked" and the like should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The present application provides a battery pack, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0032] See also Figure 1 , Figure 1 It is a schematic diagram of the explosion structure of the first embodiment of the battery pack of the present application.

[0033] In one embodiment, the battery pack 10 includes a box 11 and a plurality of single cells 20, and the plurality of single cells 20 are accommodated in the box 11. The single cells 20 include but are not limited to lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of the present disclosure. The battery pack 10 is a power supply for an electrical device. The electrical device may be a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy and an electric tool. For example, a spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft; an electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric airplane toy; an electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, 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.

[0034] Specifically, the battery pack 10 also includes a plurality of thermal management components 30 , which are thermally connected to the single cells 20 to efficiently perform thermal management on the single cells 20 and reduce the risk of abnormal operating conditions such as over-temperature or under-temperature of the single cells 20 .

[0035] Please also read Figures 2 to 4 , Figure 2 is a structural schematic diagram of an embodiment of the arrangement of a single cell and a thermal management component of the present application, Figure 3 is a schematic diagram of the structure of an embodiment of a thermal management component of the present application, Figure 4 yes Figure 3 The cross-sectional structure diagram of the thermal management component is shown. The thermal management component 30 of the embodiment of the present application is described below.

[0036] In one embodiment, the battery pack 10 has a first direction (eg Figures 1 to 3As shown by the arrow X in the middle, the same below), the single cells 20 and the thermal management components 30 are alternately distributed along the first direction. The thermal management component 30 includes a first thermal management component 31, a second thermal management component 32 and a heat exchange tube 33. The first thermal management component 31 has a heat exchange cavity 311, and the heat exchange cavity 311 has an opening on at least one side in the first direction. The second thermal management component 32 is accommodated in the heat exchange cavity 311, and the second thermal management component 32 is thermally connected to the first thermal management component 31, and the second thermal management component 32 is thermally connected to the single cell 20 facing the opening. The heat exchange tube 33 is arranged on the first thermal management component 31, and the heat exchange tube 33 is thermally connected to the first thermal management component 31, and the heat exchange tube 33 is used to accommodate a heat exchange fluid.

[0037] The second thermal management component 32 includes a phase change material. As a passive thermal management technology, the phase change material does not need to consume electrical energy in the heat exchange process. It has broad application prospects in the thermal management of the single cell 20 and has received widespread attention. Considering the limited heat storage capacity of the phase change material, the thermal management component 30 of this embodiment is also provided with a heat exchange tube 33. The heat exchange tube 33 is thermally connected to the single cell 20 through the first thermal management component 31 and the second thermal management component 32 in turn. The heat exchange fluid in the heat exchange tube 33 exchanges heat with the single cell 20 through the first thermal management component 31 and the second thermal management component 32 in turn. As an active thermal management technology, the heat exchange tube 33 can release the heat of the phase change material in time when the phase change material reaches the upper limit of the heat storage. The thermal management component 30 of this embodiment combines active thermal management technology and passive thermal management technology, which can reduce the energy consumption of the thermal management work of the single cell 20, and can effectively reduce the risk of thermal runaway problems in the single cell 20.

[0038] The phase change material, with its excellent heat storage capacity, controls the temperature of the single cell 20 within a reasonable range and the temperature difference of different single cells 20 within a reasonable range. For example, the temperature of the single cell 20 is controlled within the range of 20°C to 50°C and the maximum temperature difference between different single cells 20 is controlled within 5°C, which can reduce the risk of abnormal operating conditions such as excessively high or low temperatures in the single cell 20 and ensure the temperature uniformity of different single cells 20, so as to improve the capacity, service life and safety of the battery pack 10. In a low temperature environment, even if the single cell 20 stops working temporarily, the heat stored in the phase change material can continue to heat and keep the single cell 20 warm, and play a preheating role for the next operation of the single cell 20. The phase change material can also be added with flame retardant materials to play a flame retardant effect and reduce the risk of thermal runaway problems of the single cell 20 spreading inside the battery pack 10. In addition, the phase change material has a certain deformation ability. When the single cell 20 expands due to the temperature rise, the phase change material can deform with the expansion of the single cell 20.

[0039] Optionally, the second thermal management component 32 may include a solid-solid phase change material, such as at least one of paraffin wax, high-density polyethylene and hydrogenated styrene-butadiene block; the flame retardant material added to the phase change material may include at least one of ammonium polyphosphate, expanded graphite, pentaerythritol and montmorillonite. The second thermal management component 32 may also include a solid-liquid phase change material, such as at least one of acrylate, acrylonitrile, vinyl acetate and maleic acid; the flame retardant material added to the phase change material may include at least one of aluminum hydroxide, magnesium hydroxide, halogen flame retardant, phosphorus flame retardant, silicon dioxide, zinc borate, antimony trioxide and antimony pentoxide; the phase change material may also add thermal conductive powders such as aluminum oxide powder, zinc oxide powder, silicon oxide powder, aluminum nitride powder, boron nitride powder, graphene powder and diamond powder.

[0040] It should be noted that, in this embodiment, the second thermal management component 32 is accommodated in the heat exchange cavity 311 and is thermally connected to the first thermal management component 31, so that there is a larger heat exchange area between the first thermal management component 31 and the second thermal management component 32, which is beneficial to improve the heat exchange efficiency, and thus can efficiently manage the heat of the single battery 20.

[0041] In one embodiment, the battery pack 10 further has a reference plane (eg, Figure 2 The orthographic projection of the single cell 20 on the reference plane is within the orthographic projection of the second thermal management component 32 on the reference plane. In this way, the single cell 20 is thermally connected to the heat exchange tube 33 through the second thermal management component 32 and the first thermal management component 31 in turn, ensuring the function of the second thermal management component 32; and considering that there may be differences in the expansion coefficients of the first thermal management component 31 and the second thermal management component 32, if the single cell 20 is in direct thermal contact with the first thermal management component 31 instead of through the second thermal management component 32, this will result in differences in the forces acting on the parts of the single cell 20 that are in contact with the first thermal management component 31 and the second thermal management component 32 when the single cell 20 expands due to temperature rise, which is not conducive to ensuring the structural reliability of the single cell 20.

[0042] Specifically, the battery pack 10 also has a second direction (eg Figures 1 to 3 In the middle direction (as indicated by arrow Y, the same below) and the third direction (as indicated by arrow Y, the same below) Figure 1 and Figure 3 The first direction, the second direction and the third direction are perpendicular to each other. The battery pack 10 includes a plurality of battery groups 20a spaced apart along the first direction, and each battery group 20a includes a plurality of single cells 20 distributed along the second direction. The size of the heat exchange cavity 311 in the second direction is D1 mm, and the size of the battery group 20a in the second direction is D2 mm, satisfying: D1 ≥ D2; please refer to Figure 5, the size of the single battery 20 in the third direction is H1 mm, and the size of the heat exchange cavity 311 in the third direction is H2 mm, satisfying: H1≤H2.

[0043] It should be noted that the outer wall surface of the single cell 20 includes a top surface and a bottom surface, and a side surface connected between the top surface and the bottom surface. The pole of the single cell 20 is set on the top surface. The side surface includes a wide wall surface and a narrow wall surface, and the area of ​​the wide wall surface is larger than the area of ​​the narrow wall surface. In this embodiment, it is preferred that the wide wall surface of the single cell 20 is in thermal contact with the second thermal management component 32 to ensure that there is sufficient heat exchange area between the single cell 20 and the second thermal management component 32, further ensuring the heat exchange efficiency, so as to efficiently perform thermal management on the single cell 20.

[0044] Please continue reading Figure 4 In one embodiment, the heat exchange tube 33 is at least partially enclosed in the first thermal management component 31, that is, the heat exchange tube 33 is buried in the first thermal management component 31, which means that there is a large heat exchange area between the first thermal management component 31 and the heat exchange tube 33, which is further conducive to improving the heat exchange efficiency, so as to efficiently perform thermal management on the single battery 20.

[0045] Specifically, the heat exchange tube 33 includes an inlet tube section 331, a heat exchange tube section 332 and an outlet tube section 333 which are connected in sequence. The first thermal management component 31 has an installation channel 315 inside, the heat exchange tube section 332 is installed in the installation channel 315, and the outer peripheral surface of the heat exchange tube section 332 is in contact with the first thermal management component 31, that is, the first thermal management component 31 is coated on the outer periphery of the heat exchange tube 33. The heat exchange tube 33 exchanges heat with the first thermal management component 31 through the heat exchange tube section 332. Further, the heat exchange tube section 332 includes a first sub-tube section 3321, a second sub-tube section 3322 and a third sub-tube section 3323. The first sub-tube section 3321 and the second sub-tube section 3322 both extend along the second direction, and the first sub-tube section 3321 and the second sub-tube section 3322 are respectively located on both sides of the second thermal management component 32 in the third direction. The third sub-pipe segment 3323 is located at one side of the second heat management component 32 in the second direction, and the first sub-pipe segment 3321 and the second sub-pipe segment 3322 are connected at the same side in the second direction through the third sub-pipe segment 3323. The inlet pipe segment 331 is connected to the end of the first sub-pipe segment 3321 away from the third sub-pipe segment 3323, and the outlet pipe segment 333 is connected to the end of the second sub-pipe segment 3322 away from the third sub-pipe segment 3323.

[0046] The inlet pipe section 331 is located below the outlet pipe section 333 in the third direction. The heat exchange fluid enters from the inlet pipe section 331, passes through the heat exchange pipe section 332, and is discharged from the outlet pipe section 333. This is conducive to the heat exchange fluid filling the entire heat exchange tube 33, which is further conducive to improving the heat exchange efficiency, so as to efficiently manage the heat of the single battery 20.

[0047] Optionally, the first thermal management component 31 has good thermal conductivity, and the material of the first thermal management component 31 may be foam metal, such as foam metal aluminum.

[0048] Please continue reading Figure 5 In one embodiment, the box 11 of the battery pack 10 includes a base 111, a frame 112, and a cover 113. The frame 112 surrounds one side of the base 111, and the cover 113 covers the side of the frame 112 away from the base 111. The base 111, the frame 112, and the cover 113 cooperate to enclose a receiving cavity 114 for receiving the single battery 20.

[0049] Thermal management components 30 are respectively provided on both sides of the single cell 20 in the first direction. Specifically, the number of single cells 20 and thermal management components 30 is multiple, and the single cells 20 and thermal management components 30 are alternately distributed one by one in the first direction. A plurality of supporting protrusions 12 are protruded from the surface of the base 111 facing the single cell 20, and each supporting protrusion 12 is distributed at intervals along the first direction. The supporting protrusion 12 is embedded between two adjacent groups of thermal management components 30, and the bottom of the single cell 20 is supported by the supporting protrusion 12. Optionally, the supporting protrusion 12 can be an integral structure with the base 111. The top surface and the bottom surface of the single cell 20 are distributed along the third direction, and the bottom surface of the single cell 20 is supported by the supporting protrusion 12.

[0050] Please also read Figures 6 to 8 , Figure 6 is a schematic diagram of the exploded structure of the second embodiment of the battery pack of the present application, Figure 7 is a schematic structural diagram of an embodiment of the first thermal management component of the present application, Figure 8 It is a structural schematic diagram of an embodiment of the second thermal management component of the present application.

[0051] In an alternative embodiment, the difference between this embodiment and the above embodiment is that, in this embodiment, a plurality of first heat exchange protrusions 313 are convexly provided on the surface of the first heat management component 31 facing the heat exchange cavity 311, and a first heat exchange groove 314 is formed between two adjacent first heat exchange protrusions 313; a plurality of second heat exchange protrusions 321 are convexly provided on the surface of the second heat management component 32 facing the first heat management component 31, and a second heat exchange groove 322 is formed between two adjacent second heat exchange protrusions 321; the first heat exchange protrusion 313 is embedded in the second heat exchange groove 322, and the second heat exchange protrusion 321 is embedded in the first heat exchange groove 314. In this way, the heat exchange area between the first heat management component 31 and the second heat management component 32 is increased, which is further conducive to improving the heat exchange efficiency, so as to efficiently perform heat management on the single battery 20.

[0052] In addition, the battery pack 10 further includes a third thermal management component 40 , which is disposed between the single battery 20 and the base 111 and / or between the single battery 20 and the cover 113 . Fig. 9 The third thermal management component 40 is exemplarily shown to be disposed between the single battery 20 and the base 111. The third thermal management component 40 includes a phase change material, and the single battery 20 is thermally connected to the third thermal management component 40, so that the single battery 20 can exchange heat with the third thermal management component 40. The third thermal management component 40 cooperates with the thermal management assembly 30 to perform thermal management on the single battery 20.

[0053] The single cells 20 and the thermal management components 30 are alternately distributed one by one in the first direction. The third thermal management component 40 is embedded between two adjacent groups of thermal management components 30. The bottom of the single cell 20 is supported by the third thermal management component 40, so that the single cell 20 is in thermal contact with the third thermal management component 40.

[0054] Furthermore, the battery pack 10 further includes a heat exchange plate 13 , which is disposed between the third thermal management component 40 and the base 111 and / or between the third thermal management component 40 and the cover 113 . Fig. 9 The heat exchange plate 13 is exemplarily shown to be arranged between the third thermal management component 40 and the base 111. The interior of the heat exchange plate 13 has a flow channel structure for passing a heat exchange fluid to exchange heat with the third thermal management component 40, and the flow channel structure as a whole can be in an "S" shape. The battery pack 10 of this embodiment is provided with a third thermal management component 40 and a heat exchange plate 13, and also combines active thermal management technology and passive thermal management technology, which can reduce the energy consumption of the thermal management work of the single cell 20, and can effectively reduce the risk of thermal runaway problems in the single cell 20.

[0055] It should be noted that the top and bottom surfaces of the single cell 20 are distributed along the third direction, the bottom surface of the single cell 20 is supported by the third thermal management component 40, and the third thermal management component 40 and the heat exchange plate 13 are arranged below the single cell 20 in the third direction, so as to arrange the circuit structure electrically connected to the pole on the top surface of the single cell 20 to realize the charging and discharging functions of the single cell 20.

[0056] Please also read Fig.10 , Fig.10 It is a side structural schematic diagram of the third embodiment of the battery pack of the present application.

[0057] In another alternative embodiment, the present embodiment is different from the above embodiment in that the top and bottom surfaces of the single battery 20 are distributed along the second direction, that is, the poles of the single battery 20 are located on the side, and the circuit structure electrically connected to the poles is arranged on the side of the single battery 20 to realize the charging and discharging functions of the single battery 20. In view of this, the third thermal management component 40 is disposed between the single battery 20 and the cover 113, and the heat exchange plate 13 is disposed between the third thermal management component 40 and the cover 113.

[0058] It should be noted that only the third thermal management component 40 may be arranged between the single cell 20 and the cover body 113; and, on the basis of the third thermal management component 40 and the heat exchange plate 13 being arranged between the single cell 20 and the cover body 113, the third thermal management component 40 and / or the heat exchange plate 13 may also be arranged between the single cell 20 and the base 111.

[0059] In summary, the present application provides a battery pack. The thermal management component of the battery pack includes a first thermal management component, a second thermal management component and a heat exchange tube. The first thermal management component has a heat exchange cavity, the second thermal management component includes a phase change material, and the second thermal management component is accommodated in the heat exchange cavity and is thermally connected to the adjacent single battery through the opening of the heat exchange cavity, and the first thermal management component is also thermally connected to the heat exchange tube. Among them, the second thermal management component is accommodated in the heat exchange cavity and is thermally connected to the first thermal management component, so that there is a larger heat exchange area between the first thermal management component and the second thermal management component, which is conducive to improving the heat exchange efficiency, and thus can efficiently perform thermal management of the single battery.

[0060] The battery pack provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction, and the battery pack includes: a plurality of battery cells; and A plurality of thermal management components, wherein the thermal management components and the single cells are alternately distributed along the first direction; Wherein, the thermal management component includes a first thermal management component, a second thermal management component and a heat exchange tube; the first thermal management component has a heat exchange cavity, and the heat exchange cavity has an opening on at least one side in the first direction; the second thermal management component is accommodated in the heat exchange cavity, and the second thermal management component is thermally connected to the first thermal management component, the second thermal management component is thermally connected to the single battery facing the opening, and the second thermal management component includes a phase change material; the heat exchange tube is arranged on the first thermal management component and is thermally connected to the first thermal management component, and the heat exchange tube is used to accommodate a heat exchange fluid.

2. The battery pack according to claim 1, characterized in that: The first heat management component is provided with a plurality of first heat exchange protrusions on the surface facing the heat exchange cavity, and a first heat exchange groove is formed between two adjacent first heat exchange protrusions; the second heat management component is provided with a plurality of second heat exchange protrusions on the surface facing the first heat management component, and a second heat exchange groove is formed between two adjacent second heat exchange protrusions; the first heat exchange protrusion is embedded in the second heat exchange groove, and the second heat exchange protrusion is embedded in the first heat exchange groove.

3. The battery pack according to claim 1, characterized in that: The heat exchange tube is at least partially covered in the first thermal management component.

4. The battery pack according to claim 3, characterized in that: The heat exchange pipe includes an inlet pipe section, a heat exchange pipe section and an outlet pipe section which are connected in sequence; the first thermal management component has an installation channel inside, the heat exchange pipe section is installed in the installation channel, and the outer peripheral surface of the heat exchange pipe section is in contact with the first thermal management component.

5. The battery pack according to claim 4, characterized in that: The battery pack further has a second direction and a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; the battery pack comprises a plurality of battery packs spaced apart along the first direction, and each of the battery packs comprises a plurality of single cells spaced apart along the second direction; Wherein, the heat exchange pipe segment includes a first sub-pipe segment, a second sub-pipe segment and a third sub-pipe segment; the first sub-pipe segment and the second sub-pipe segment both extend along the second direction, and the first sub-pipe segment and the second sub-pipe segment are respectively located on both sides of the second thermal management component in the third direction; the third sub-pipe segment is located on one side of the second thermal management component in the second direction, and the first sub-pipe segment and the second sub-pipe segment are connected on the same side ends in the second direction through the third sub-pipe segment, the inlet pipe segment is connected to the end of the first sub-pipe segment away from the third sub-pipe segment, and the outlet pipe segment is connected to the end of the second sub-pipe segment away from the third sub-pipe segment.

6. The battery pack according to claim 1, characterized in that: The battery pack also has a reference plane perpendicular to the first direction; The orthographic projection of the single battery on the reference plane is within the orthographic projection of the second thermal management component on the reference plane.

7. The battery pack according to claim 1, characterized in that: The battery pack further has a second direction and a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; the battery pack comprises a plurality of battery packs spaced apart along the first direction, and each of the battery packs comprises a plurality of single cells spaced apart along the second direction; The size of the heat exchange cavity in the second direction is D1 mm, the size of the battery pack in the second direction is D2 mm, and the following conditions are satisfied: D1≥D2; And / or the size of the single cell in the third direction is H1 mm, the size of the heat exchange cavity in the third direction is H2 mm, and the following is satisfied: H1≤H2.

8. The battery pack according to claim 1, characterized in that: The thermal management components are respectively arranged on both sides of the single battery in the first direction; The battery pack further comprises: The box body comprises a base and a frame arranged around the outer periphery of the base, wherein the base and the frame cooperate to enclose a receiving cavity for receiving the single battery; Wherein, a plurality of supporting protrusions are protruding from the surface of the base facing the single battery, the supporting protrusions are embedded between two adjacent groups of the thermal management components, and the bottom of the single battery is supported by the supporting protrusions.

9. The battery pack according to claim 1, characterized in that: The battery pack further comprises: A box body, comprising a base, a frame and a cover, wherein the frame is arranged around one side of the base, and the cover covers a side of the frame away from the base, and the base, the frame and the cover cooperate to enclose a receiving cavity for receiving the single battery; and The third thermal management component is disposed between the single cell and the base and / or between the single cell and the cover, wherein the third thermal management component includes a phase change material.

10. The battery pack according to claim 9, characterized in that: The battery pack further comprises: The heat exchange plate is arranged between the third heat management component and the base and / or between the third heat management component and the cover.

11. The battery pack according to claim 9, characterized in that: The thermal management components are respectively arranged on both sides of the single battery in the first direction, the third thermal management component is embedded between two adjacent groups of the thermal management components, and the third thermal management component is in thermal contact with the single battery.

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