Battery pack and electric device

Abstract

The application relates to the technical field of battery pack structures, and discloses a battery pack and a power utilization equipment, which have a first direction, a second direction and a third direction perpendicular to each other, comprise a plurality of first cold plates, a plurality of battery modules and a second cold plate, the plurality of battery modules are arranged side by side along the first direction, the battery module comprises a plurality of battery cells, in one battery module, the plurality of battery cells are arranged side by side along the second direction, the pole of the battery cell is arranged on the end surface of the battery cell along the first direction, the end of the battery module along the first direction is provided with the first cold plate, and the first cold plate is in contact with the part on the battery module where the pole is located; the second cold plate is in contact with one side of the plurality of battery modules along the third direction, so that the problem that the battery pack has poor heat dissipation performance and cannot meet the heat dissipation requirement is solved or improved.

Description

Technical Field

[0001] This application relates to the field of battery pack structure technology, specifically to battery packs and electrical equipment. Background Technology

[0002] Battery packs are the core energy storage and supply units in electric vehicles (such as electric cars and electric aircraft) and energy storage systems. They store the energy from the grid or regenerative braking through internal cells, serving as a mobile "energy reservoir" to provide continuous power to the equipment.

[0003] In related technologies, a heat dissipation plate is only installed at the bottom inner part of the battery pack to dissipate heat from the battery cells inside the battery pack. However, the heat dissipation performance is limited and cannot meet the heat dissipation requirements of the battery pack. Utility Model Content

[0004] This application provides a battery pack and electrical device to solve or improve the problem of poor heat dissipation performance of the battery pack, which fails to meet heat dissipation requirements.

[0005] On one hand, this application provides a battery pack electrical device having a first direction, a second direction, and a third direction that are perpendicular to each other, including multiple first cold plates, multiple battery modules, and a second cold plate. The multiple battery modules are arranged side by side along the first direction, and each battery module includes multiple battery cells. In one battery module, the multiple battery cells are arranged side by side along the second direction. The terminals of the battery cells are disposed on the end face of the battery cells along the first direction. The first cold plate is disposed at the end of the battery module along the first direction, and the first cold plate is in contact with the portion of the battery module where the terminals are located. The second cold plate is in contact with one side of the multiple battery modules along the third direction.

[0006] Beneficial effects: By using multiple battery modules arranged side by side along a first direction, and the battery cells in each battery module arranged side by side along a second direction, and the terminal post of the battery cell is located on the end face of the battery cell along the first direction and in contact with the first cold plate, and combined with the second cold plate located on one side of the battery module along the third direction, the battery modules in the battery pack are cooled, which can significantly improve the heat dissipation effect of the battery pack and meet the heat dissipation requirements of the battery pack.

[0007] In one optional implementation, the plurality of terminals in the battery module are all located on the same side of the battery module along the first direction.

[0008] In one optional implementation, in any two adjacent battery modules, along the first direction, one battery module has the side with the terminal post on it, which is close to the side of the other battery module that does not have the terminal post on it.

[0009] In an optional embodiment, the battery module further includes an elastic heat-conducting component, wherein the first cold plate and the elastic heat-conducting component are sequentially disposed between any two battery modules, one side of the elastic heat-conducting component is in contact with the first cold plate, and the other side of the elastic heat-conducting component is in contact with the side of one of the battery modules where the terminal post is not disposed; and / or, the battery module further includes an elastic compression component, wherein the elastic compression component is disposed between any two battery cells in each battery module.

[0010] In one optional embodiment, the battery module further includes a connecting piece, through which the terminals of a plurality of battery cells in the battery module are connected, and along the first direction, at least a portion of the connecting piece away from the terminals is in contact with the first cold plate.

[0011] In one alternative embodiment, the housing further includes a housing having a receiving cavity in which a plurality of the first cold plates and a plurality of the battery modules are located; wherein the housing has an opening on one side along the third direction, and the second cold plate is at least a portion of the housing on the other side along the third direction.

[0012] In one optional embodiment, the first cold plate includes a first end plate, a cold plate body, and a second end plate. The first end plate and the second end plate are respectively connected to two ends of the cold plate body along the second direction. The cold plate body is provided with a first channel and a second channel, both of which extend along the second direction. The first end plate is provided with an inlet chamber and an outlet chamber, and the second end plate is provided with a manifold. The two ends of the first channel are respectively connected to the inlet chamber and the manifold, and the two ends of the second channel are respectively connected to the outlet chamber and the manifold.

[0013] In one alternative implementation, along the first direction, in any two adjacent first cold plates, the liquid inlet chamber on one first cold plate and the liquid outlet chamber on the other first cold plate are connected by a retractable pipe.

[0014] In one optional embodiment, the housing is provided with a liquid inlet and a liquid outlet, and a cooling channel is provided inside the second cold plate. The first end of the cooling channel is connected to the liquid inlet, and the second end of the cooling channel is connected to the liquid outlet. Among the plurality of first cold plates, the liquid inlet cavity on the first cold plate located on one side of the first direction is connected to the portion of the cooling channel near the liquid inlet, and the liquid outlet cavity on the first cold plate located on the other side of the first direction is connected to the portion of the cooling channel near the liquid outlet.

[0015] On the other hand, this application also provides an electrical device including the battery pack in any of the above embodiments.

[0016] Beneficial effects: Since the electrical equipment includes a battery pack, it has the same technical effects as the battery pack, so they will not be elaborated here. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an axonometric view of a battery pack according to an embodiment of this application, with a portion of the housing removed. Figure 2 This is an exploded view of a battery pack according to an embodiment of this application, with a portion of the casing removed. Figure 3 This is a top view of a battery pack according to an embodiment of this application, with a portion of the casing removed. Figure 4 for Figure 3 Cross-sectional view at point AA; Figure 5 This is an axonometric view of a battery module in a battery pack according to an embodiment of this application; Figure 6 This is a top view of a first cold plate in a battery pack according to an embodiment of this application; Figure 7 for Figure 6 Sectional view at point BB.

[0019] Explanation of reference numerals in the attached figures: X, first direction; Y, second direction; Z, third direction; 1. First cold plate; 2. Battery module; 3. Second cold plate; 4. Flexible heat-conducting component; 5. Housing; 6. Piping; 11. First end plate; 111. Liquid inlet chamber; 112. Liquid outlet chamber; 12. Cold plate body; 121. First channel; 122. Second channel; 13. Second end plate; 131. Manifold; 14. Support; 21. Battery cell; 211. Terminal post; 22. Connecting piece; 23. Telescopic compression component; 31. Cooling flow channels; 51. Receptacle; 52. Inlet; 53. Outlet. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Battery packs are the core energy storage and supply units in electric vehicles (such as electric cars and electric aircraft) and energy storage systems. They store the energy from the grid or regenerative braking through internal cells, serving as a mobile "energy reservoir" to provide continuous power to the equipment.

[0023] In related technologies, a heat dissipation plate is only installed at the bottom inner part of the battery pack to dissipate heat from the battery cells inside the battery pack. However, the heat dissipation performance is limited and cannot meet the heat dissipation requirements of the battery pack.

[0024] Therefore, this application provides a battery pack and electrical device to solve or improve the problem of poor heat dissipation performance of the battery pack, which fails to meet heat dissipation requirements.

[0025] The following is combined Figures 1 to 7 This describes an embodiment of the present application.

[0026] According to embodiments of this application, in one aspect, a battery pack is provided, such as... Figures 1 to 4 As shown, the battery pack has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other. The battery pack includes multiple first cold plates 1, multiple battery modules 2, and a second cold plate 3. The specific scheme is as follows.

[0027] like Figure 2 As shown, the first cold plate 1 can be a metal plate or a high-strength thermally conductive plastic plate, etc. Specifically, the first cold plate 1 can be circulated with a heat dissipation medium (such as water) to perform heat exchange.

[0028] like Figures 2 to 4 As shown, multiple battery modules 2 are arranged side by side along the first direction X. The number of battery modules 2 can be selected and set according to actual needs. Each battery module 2 includes multiple battery units 21. Specifically, each battery unit 21 is a square battery. In one battery module 2, multiple battery units 21 are arranged side by side along the second direction Y. The terminals 211 of each battery unit 21 are arranged on the end face of the battery unit 21 along the first direction X, that is, the battery units 21 are arranged horizontally. A first cold plate 1 is provided at the end of the battery module 2 along the first direction X. The first cold plate 1 is in contact with the part where the terminals 211 are located on the battery module 2.

[0029] The part where the first cold plate 1 contacts the terminal post 211 of the battery module 2 is an insulating area, that is, the outer shell of the first cold plate 1 can be an insulating material, or the outer shell of the first cold plate 1 can be coated with an insulating coating, etc.

[0030] It is understandable that the contact between the terminal post 211 on the battery module 2 and the part connected to the terminal post 211, such as the busbar or connecting piece 22, refers to the terminal post 211 itself or the parts connected to the terminal post 211. Thus, the first cold plate 1 contacts the part of the battery module 2 where the terminal post 211 is located. That is, the first cold plate 1 can directly contact the terminal post 211, or it can also contact the part connected to the terminal post 211, such as the busbar or connecting piece 22, in order to dissipate heat from the terminal post 211 of the battery cell 21.

[0031] It is also understood that the terminal post 211 of the battery unit 21 is disposed on the end face of the battery unit 21 along the first direction X. That is, in each battery module 2, the terminal post 211 of the battery unit 21 can be disposed on any one of the two sides of the battery module 2 along the first direction X.

[0032] like Figure 4 As shown, the second cold plate 3 is a plate that can be circulated with heat dissipation medium, and the second cold plate 3 is in contact with the multiple battery modules 2 on one side along the third direction Z.

[0033] It is understandable that the second cold plate 3 can be set on any side of the battery module 2 along the third direction Z. Generally speaking, the third direction Z refers to the height direction (i.e. the thickness direction) of the battery pack. The second cold plate 3 is set at the inner bottom of the battery pack.

[0034] In specific usage, such as Figures 1 to 4 As shown, taking a battery pack comprising three battery modules 2, each battery module 2 comprising 13 battery cells 21 as an example, the terminal post 211 of the battery cell in the battery module 2 is in contact with the first cold plate 1, and the second cold plate 3 is arranged at the bottom of the three battery modules 2 to dissipate heat from the bottom of the three battery modules 2.

[0035] During the charging and discharging process of the battery, the first cold plate 1 cools the terminal post 211 of the battery cell 21, and the second cold plate 3 cools the battery module 2 on the Z-direction side.

[0036] In this embodiment, such as Figures 1 to 4 As shown, multiple battery modules 2 are arranged side by side along the first direction X, and the battery cells 21 in each battery module 2 are arranged side by side along the second direction Y. The terminal post 211 of the battery cell is located on the end face of the battery cell 21 along the first direction X and contacts the first cold plate 1. Combined with the second cold plate 3 located on the side of the battery module 2 along the third direction Z, the battery modules 2 in the battery pack are cooled, which can significantly improve the heat dissipation effect of the battery pack and meet the heat dissipation requirements of the battery pack.

[0037] In one embodiment, such as Figure 2 As shown, the multiple terminals 211 in the battery module 2 are all located on the same side of the battery module 2 along the first direction X, that is, the multiple battery cells 21 in a battery module 2 are all arranged in one direction.

[0038] It is understandable that the multiple terminals 211 in battery module 2 refer to the terminals 211 of multiple battery cells 21 in battery module 2.

[0039] It is understandable that, in two adjacent battery modules 2, along the first direction X, the side of one battery module 2 with the terminal post 211 can be arranged opposite to the side of the other battery module 2 with the terminal post 211, or they can be arranged opposite each other, etc.

[0040] When two battery modules 2 are arranged opposite each other on the side with the terminal post 211, a first cold plate 1 can be provided between the two battery modules 2, or the first cold plate 1 can be omitted.

[0041] In a specific structure, such as Figures 1 to 4 As shown, in any two adjacent battery modules 2, along the first direction X, the side of one battery module 2 with the terminal post 211 is close to the side of the other battery module 2 without the terminal post 211, that is, multiple battery modules 2 are arranged in the same direction along the first direction X.

[0042] In this embodiment, such as Figures 1 to 4 As shown, the terminals 211 of multiple battery cells 21 in the battery module 2 are all located on the same side of the battery module 2 along the first direction X, so that the terminals 211 of the battery module 2 can contact the same first cold plate 1 for heat dissipation, which can simplify the battery layout structure.

[0043] In one embodiment, such as Figures 2 to 4 As shown, the battery pack also includes an elastic thermal conductive component 4. Specifically, the elastic thermal conductive component 4 is thermally conductive foam, thermally conductive silicone, thermally conductive gel, etc. A first cold plate 1 and an elastic thermal conductive component 4 are sequentially arranged between any two battery modules 2. One side of the elastic thermal conductive component 4 is in contact with the first cold plate 1, and the other side of the elastic thermal conductive component 4 is in contact with the side of a battery module 2 that does not have a terminal post 211.

[0044] It is understandable that a first cold plate and an elastic heat-conducting component 4 are arranged sequentially along the first direction X between two adjacent battery modules 2. One side of the first cold plate 1 is in contact with the part where the electrode post 211 is located on one battery module 2, the other side of the first cold plate 1 is in contact with one side of the elastic heat-conducting component 4, and the other side of the elastic heat-conducting component 4 is in contact with the side of the other battery module 2 where the electrode post 211 is not provided along the first direction X.

[0045] like Figure 5 As shown, the battery module 2 also includes an elastic compression member. Specifically, the elastic compression member can be a heat insulation sheet, etc. In each battery module 2, an elastic compression member is provided between any two battery cells 21.

[0046] In this embodiment, by providing the elastic heat-conducting component 4, the vibration of multiple battery modules 2 along the first direction X can be mitigated; while the provision of the elastic compression component can fix multiple battery units 21 in each battery module 2, thereby mitigating the vibration of multiple battery units 21 along the second direction Y.

[0047] In one embodiment, such as Figures 4 to 5 As shown, the battery module 2 also includes a connecting piece 22. The terminals 211 of the multiple battery cells 21 in the battery module 2 are connected by the connecting piece 22. Along the first direction X, at least a portion of the area on the connecting piece 22 away from the terminals 211 is in contact with the first cold plate 1.

[0048] Specifically, the connecting piece 22 is made of copper, aluminum, or a copper-aluminum alloy.

[0049] It is understandable that the connecting piece 22 can be part of an integrated busbar or a busbar, or it can be a separate component. Multiple battery units 21 in the battery module 2 can be connected in series through the connecting piece 22, or multiple battery units 21 can be connected in parallel to form a power supply unit, and multiple power supply units can be connected in series, etc.

[0050] In the specific structure, the connecting piece 22 is welded to the top surface of the terminal post 211 on the battery cell 21 along one side of the first direction X, and the part of the connecting piece 22 corresponding to the terminal post 211 along the other side of the first direction X contacts the first cold plate 1.

[0051] Along the first direction X, the part of the connecting piece 22 that is misaligned with the pole post 211 extends away from the first cold plate 1.

[0052] In this embodiment, such as Figure 5 As shown, the terminals 211 of multiple battery cells 21 in the battery module 2 are connected by connecting pieces 22. Along the first direction X, at least a portion of the connecting piece 22 away from the terminals 211 is in contact with the first cold plate 1, so that the heat generated at the terminals 211 of the battery cell 21 is exchanged with the first cold plate 1 through the connecting piece 22. The structure is simple and easy to manufacture.

[0053] In one embodiment, such as Figures 3 to 4 As shown, the battery pack also includes a housing 5. Specifically, the housing 5 is made of aluminum alloy and has a cavity 51. Multiple first cold plates 1 and multiple battery modules 2 are located in the cavity 51. The housing (5) is opened on one side along the third direction Z, and the second cold plate 3 is at least a part of the housing 5 on the other side along the third direction Z.

[0054] It is understood that at least a portion of the plate on the other side of the shell 5 along the third direction Z is the second cold plate 3, that is, the second cold plate 3 is integrated on the plate on the other side of the shell 5 along the third direction Z, or the plate on the other side of the shell 5 along the third direction Z is formed by the second cold plate 3.

[0055] Preferably, the third direction Z is the height direction of the shell 5, and the second cold plate 3 is at least a part of the bottom plate of the shell 5.

[0056] Specifically, the cooling channel 31 inside the second cold plate 3 adopts a U-shaped design, the shell 5 is made of high-strength aluminum alloy, which takes into account both thermal conductivity and high structural strength, the joint between the channel and other parts of the shell 5 is sealed by laser welding, which can prevent the leakage of heat dissipation medium, and the shell 5 is designed with an anti-corrosion coating to make it suitable for outdoor energy storage environments under harsh conditions and improve the durability of the shell 5.

[0057] In this embodiment, such as Figures 3 to 4 As shown, the second cold plate 3 is used as at least a part of one side of the shell 5 along the third direction Z. The second cold plate 3 is used as at least a part of the shell 5 along the third direction Z. Thus, the flow channel in the second cold plate 3 can enhance the strength of the shell 5, thereby realizing the lightweight design of the shell 5, and can directly dissipate heat to the outside through the second cold plate 3 to improve the heat dissipation efficiency.

[0058] In one embodiment, such as Figures 6 to 7 As shown, the first cold plate 1 includes a first end plate 11, a cold plate body 12, and a second end plate 13. The first end plate 11 and the second end plate 13 are respectively connected to the two ends of the cold plate body 12 along the second direction Y. A first channel 121 and a second channel 122 are provided inside the cold plate body 12. Both the first channel 121 and the second channel 122 extend along the second direction Y.

[0059] Specifically, such as Figure 7 As shown, the number of first channels 121 can be one or more, and the number of second channels 122 can be one or more. When there are multiple first channels 121 and multiple second channels 122, the multiple first channels 121 and multiple second channels 122 are arranged side by side in the cold plate body 12 along the third direction Z. That is, the multiple first channels 121 and multiple second channels 122 are arranged in the cold plate body 12 along the third direction Z.

[0060] like Figure 7 As shown, the first end plate 11 is provided with an inlet chamber 111 and an outlet chamber 112, and the second end plate 13 is provided with a manifold 131. The two ends of the first channel 121 are sealed and connected to the inlet chamber 111 and the manifold 131 by welding or bonding, respectively. The two ends of the second channel 122 are sealed and connected to the outlet chamber 112 and the manifold 131 by welding or bonding, respectively.

[0061] Specifically, such as Figure 2 As shown, the first end plate 11 and the second end plate 13 can contact the inner bottom of the housing 5 through the bracket 14, which can be an M-shaped sheet.

[0062] In actual use, the coolant enters the first channel 121, the manifold 131 and the second channel 122 in sequence through the inlet chamber 111, and is discharged through the outlet chamber 112, thereby causing the heat dissipation medium to flow and circulate within the first cold plate 1.

[0063] In this embodiment, such as Figures 6 to 7As shown, a first channel 121 and a second channel 122 are set in the body of the cold plate. The two ends of the first channel 121 are connected to the liquid inlet chamber 111 and the manifold chamber 131, respectively. The two ends of the second channel 122 are connected to the liquid outlet chamber 112 and the manifold chamber 131, respectively. This allows the heat dissipation medium to flow in the first cold plate 1, resulting in good heat dissipation, simple structure, and easy manufacturing.

[0064] In one embodiment, such as Figure 2 As shown, along the first direction X, in any two adjacent first cold plates 1, the liquid inlet chamber 111 on one first cold plate 1 and the liquid outlet chamber 112 on the other first cold plate 1 are connected by a retractable pipe 6.

[0065] Specifically, pipe 6 is a corrugated pipe, or other expandable pipe.

[0066] In this embodiment, such as Figure 2 As shown, in any two adjacent first cold plates 1, the liquid inlet chamber 111 on one first cold plate 1 and the liquid outlet chamber 112 on the other first cold plate 1 are connected by a telescopic pipe 6. The connection method is simple, and the telescopic pipe 6 can absorb the change in the distance between adjacent battery modules 2.

[0067] In one embodiment, such as Figure 2 As shown, the housing 5 is provided with a liquid inlet 52 and a liquid outlet 53, and a cooling channel 31 is provided in the second cold plate 3. The first end of the cooling channel 31 is connected to the liquid inlet 52, and the second end of the cooling channel 31 is connected to the liquid outlet 53. Specifically, the cooling channel 31 is arranged in a U-shape in the second cold plate 3.

[0068] Among them, the liquid inlet cavity 111 on the first cold plate 1 located on the first direction X side is connected to the part of the cooling channel 31 near the liquid inlet 52. Specifically, the second cold plate 3 is provided with a first plug, which is connected to the part of the cooling channel 31 near the liquid inlet 52. The liquid inlet cavity 111 on the first cold plate 1 located on the first direction X side is connected to the first plug through a connecting pipe.

[0069] The liquid outlet cavity 112 on the first cold plate 1 located on the other side of the first direction X is connected to the part of the cooling channel 31 near the liquid outlet 53; specifically, the second cold plate 3 is provided with a second plug, which is connected to the part of the cooling channel 31 near the liquid outlet 53, and the liquid outlet cavity 112 on the first cold plate 1 located on the other side of the first direction X is connected to the second plug through a connecting pipe.

[0070] In this embodiment, such as Figure 2As shown, multiple first cold plates 1 are connected in series using pipe 6, and the two ends of the multiple first cold plates 1 connected in series are respectively connected to the parts of the cooling channel 31 in the second cold plate 3 near the liquid inlet 52 and the liquid outlet 53, so that heat dissipation medium can be delivered to multiple first cold plates 1 and second cold plates 3 at the same time.

[0071] According to an embodiment of this application, in another aspect, an electrical device is provided, including the battery pack in any of the above embodiments.

[0072] Specifically, electrical equipment can include electric bicycles, vehicles, ships, spacecraft, and electric toys, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. The embodiments of this application do not impose special limitations on the aforementioned electrical equipment.

[0073] In this embodiment, since the electrical device includes a battery pack and has the same technical effects as the battery pack, it will not be described in detail here.

[0074] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other, characterized in that, include: Multiple first cold plates (1); Multiple battery modules (2) are arranged side by side along a first direction (X). Each battery module (2) includes multiple battery cells (21). In one battery module (2), multiple battery cells (21) are arranged side by side along a second direction (Y). The terminal post (211) of the battery cell (21) is disposed on the end face of the battery cell (21) along the first direction (X). The end of the battery module (2) along the first direction (X) is provided with a first cold plate (1). The first cold plate (1) is in contact with the part of the battery module (2) where the terminal post (211) is located. The second cold plate (3) contacts one side of the plurality of battery modules (2) along the third direction (Z).

2. The battery pack according to claim 1, characterized in that, The plurality of terminals (211) in the battery module (2) are all located on the same side of the battery module (2) along the first direction (X).

3. The battery pack according to claim 2, characterized in that, In any two adjacent battery modules (2), along the first direction (X), one side of the battery module (2) is provided with the terminal post (211), and the other side of the battery module (2) is not provided with the terminal post (211).

4. The battery pack according to claim 3, characterized in that, It also includes an elastic heat-conducting component (4). The first cold plate (1) and the elastic heat-conducting component (4) are arranged sequentially between any two battery modules (2). One side of the elastic heat-conducting component (4) is in contact with the first cold plate (1), and the other side of the elastic heat-conducting component (4) is in contact with the side of one of the battery modules (2) where the pole post (211) is not provided. And / or, the battery module (2) further includes an elastic compression member, and in each battery module (2), the elastic compression member is disposed between any two battery cells (21).

5. The battery pack according to any one of claims 1 to 4, characterized in that, The battery module (2) further includes a connecting piece (22), through which the terminals (211) of the plurality of battery cells (21) in the battery module (2) are connected. Along the first direction (X), at least a portion of the area on the connecting piece (22) away from the terminals (211) is in contact with the first cold plate (1).

6. The battery pack according to any one of claims 1 to 4, characterized in that, It also includes a housing (5) having a receiving cavity (51) in which multiple first cold plates (1) and multiple battery modules (2) are located; The housing (5) has an opening on one side along the third direction (Z), and the second cold plate (3) is at least a portion of the housing (5) on the other side along the third direction (Z).

7. The battery pack according to claim 6, characterized in that, The first cold plate (1) includes a first end plate (11), a cold plate body (12), and a second end plate (13). The first end plate (11) and the second end plate (13) are respectively connected to the two ends of the cold plate body (12) along the second direction (Y). The cold plate body (12) is provided with a first channel (121) and a second channel (122). The first channel (121) and the second channel (122) both extend along the second direction (Y). The first end plate (11) is provided with an inlet chamber (111) and an outlet chamber (112). The second end plate (13) is provided with a manifold (131). The two ends of the first channel (121) are respectively connected to the inlet chamber (111) and the manifold (131). The two ends of the second channel (122) are respectively connected to the outlet chamber (112) and the manifold (131).

8. The battery pack according to claim 7, characterized in that, Along the first direction (X), in any two adjacent first cold plates (1), the liquid inlet chamber (111) on one first cold plate (1) and the liquid outlet chamber (112) on the other first cold plate (1) are connected by a retractable pipe (6).

9. The battery pack according to claim 8, characterized in that, The housing (5) is provided with a liquid inlet (52) and a liquid outlet (53). The second cold plate (3) is provided with a cooling channel (31). The first end of the cooling channel (31) is connected to the liquid inlet (52), and the second end of the cooling channel (31) is connected to the liquid outlet (53). Among the plurality of first cold plates (1), the liquid inlet cavity (111) on the first cold plate (1) located on the first direction (X) side is connected to the part of the cooling channel (31) near the liquid inlet (52), and the liquid outlet cavity (112) on the first cold plate (1) located on the other side of the first direction (X) is connected to the part of the cooling channel (31) near the liquid outlet (53).

10. An electrical appliance, characterized in that, include: The battery pack as described in any one of claims 1 to 9.

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