Battery pack and electric equipment

Abstract

The embodiment of the invention provides a battery pack and electric equipment, the battery pack can comprise a shell, a battery pack unit and a cold plate assembly, the battery pack unit comprises at least two battery packs, the shell is provided with an accommodating cavity, and the at least two battery packs are sequentially arranged in the accommodating cavity along a first direction. The cold plate assembly comprises a cold plate unit and at least one third cold plate, and the cold plate unit is arranged on at least one side of the battery pack unit in the first direction and used for dissipating heat of the battery pack adjacent to the cold plate unit. And the at least one third cold plate is arranged between two adjacent battery packs of the battery pack unit and is used for dissipating heat of the two adjacent battery packs. The battery pack disclosed by the invention is relatively good in heat dissipation effect.

Description

Technical Field

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

[0002] A battery pack typically consists of a body and several battery packs. The body has an internal cavity, housing the battery packs. To dissipate heat from the battery packs, the battery pack may also include a cold plate. This plate is in thermal contact with the battery packs, cooling each cell in the pack to prevent them from overheating.

[0003] In the related art, multiple battery packs are stacked in the height direction of the battery pack. In this case, it is difficult for the heat dissipation cold plate to dissipate heat evenly for each battery pack, resulting in poor heat dissipation effect. Summary of the Invention

[0004] Based on this, the embodiments of the present application provide a battery pack and an electrical device, and the battery pack has a good heat dissipation effect.

[0005] In a first aspect, the present application provides a battery pack, comprising:

[0006] A housing having a receiving cavity;

[0007] A battery pack unit, the battery pack unit is accommodated in the accommodating cavity, the battery pack unit includes at least two battery packs, and the at least two battery packs are arranged in sequence along a first direction;

[0008] Cold plate assembly, the cold plate assembly includes:

[0009] a cold plate unit, the cold plate unit being arranged on at least one side of the battery pack unit along the first direction and being used to dissipate heat for the battery pack arranged adjacent thereto;

[0010] At least one third cold plate is disposed between two adjacent battery modules of the battery pack unit and is used to dissipate heat for the two adjacent battery modules.

[0011] In one possible implementation, the cold plate unit includes a first cold plate, which is disposed on one side of the battery pack unit along the first direction and is used to dissipate heat for a battery pack adjacent thereto;

[0012] And / or, the cold plate unit includes a second cold plate, and the first cold plate is arranged on the other side of the battery pack unit along the first direction and is used to dissipate heat for the battery pack arranged adjacent to the first cold plate.

[0013] In one possible implementation, the cold plate assembly further includes a first interface component, a second interface component, and a third interface component. The first interface component is connected to the flow channel of the first cold plate, the second interface component is connected to the flow channel of the second cold plate, and the third interface component is connected to the flow channel of the third cold plate.

[0014] In one possible implementation, the housing includes an upper cover and a tray, wherein the upper cover and the tray are connected to jointly define a receiving cavity;

[0015] The first cold plate is connected to the upper cover.

[0016] In a possible implementation, the upper cover includes a top wall and a bottom wall connected to each other, and the top wall and the bottom wall are located at two ends of the upper cover along the first direction;

[0017] The first cold plate is connected to the top wall, and the tray is connected to the bottom wall.

[0018] In a possible implementation, the device further includes a plurality of first connecting members and a plurality of second connecting members, wherein the plurality of first connecting members are arranged at intervals along at least one of the second direction and the third direction;

[0019] One end of the first connecting member is connected to the first cold plate, and the other end of the first connecting member passes through the top wall to be connected to the second connecting member, and the second connecting member is stopped at the outer side of the top wall.

[0020] In one possible implementation, the plurality of first connectors are welded to a side of the first cold plate facing away from the first battery pack, the first connectors have first external threads, and the second connectors have first internal threads matching the first external threads.

[0021] The top wall has a plurality of first connecting holes, and each first connecting member passes through the corresponding first connecting hole to be threadedly connected with the corresponding second connecting member.

[0022] In a possible implementation manner, the top wall has an avoidance opening, and the projection of the first cold plate on the top wall covers the avoidance opening.

[0023] In a possible implementation, a first seal is further included. The first seal extends along the circumference of the avoidance opening and abuts between the top wall and the first cold plate to seal the gap between the top wall and the first cold plate.

[0024] In one possible implementation, the at least two battery groups include a first battery group and a second battery group, and the first battery group and the second battery group are arranged along a first direction;

[0025] The first cold plate is located on a side of the first battery group facing away from the second battery group, and the first cold plate is in thermal contact with the first battery group;

[0026] The second cold plate is disposed on a side of the second battery group facing away from the first battery group, and the second cold plate is in thermal contact with the second battery group;

[0027] The third cold plate is located between the first battery group and the second battery group, and two opposite surfaces of the third cold plate are in thermal contact with the first battery group and the second battery group respectively.

[0028] In a possible implementation, at least one first side beam is further included, the at least one first side beam extends along the second direction, the at least one first side beam is connected to a side of the first cold plate facing the first battery pack, and the at least one first side beam is located outside the first battery pack.

[0029] In a possible implementation, there are two first side beams, and the two first side beams are arranged on both sides of the first battery pack along the third direction.

[0030] In one possible implementation, the second cold plate is connected to the tray, and the top wall and the tray are both connected to the third cold plate.

[0031] In one possible implementation, at least one second side beam is further included, at least one second side beam extends along the second direction, at least one second side beam is connected to the tray, at least one first side beam and at least one second side beam are correspondingly arranged on both sides of the third cold plate along the first direction, and at least one second side beam is located on the outside of the second battery pack.

[0032] In a possible implementation, a plurality of third connecting members are further included. In the first direction, the third connecting members sequentially connect the top wall, the first side beam, the third cold plate, and the second side beam.

[0033] In one possible implementation, the top wall has a second connecting hole, the first side beam has a third connecting hole, the third cold plate has a fourth connecting hole, the second side beam has a fifth connecting hole, the third connecting member has a second external thread, and the fifth connecting hole has a second internal thread matching the second external thread;

[0034] The third connecting member passes through the second connecting hole, the third connecting hole and the fourth connecting hole in sequence to be threadedly connected to the fifth connecting hole.

[0035] In one possible implementation, the first battery pack and the second battery pack each include a plurality of battery cells, and the plurality of battery cells are arranged along a third direction;

[0036] The battery cell includes an electrode lead-out portion, which is located at at least one end of the battery cell along the second direction;

[0037] The first connecting member is connected to two sides of the upper cover along the second direction, and the third connecting member is connected to two sides of the upper cover along the third direction.

[0038] In a possible implementation, the device further includes a plurality of fourth connecting members, wherein the plurality of fourth connecting members are arranged at intervals along at least one of the second direction and the third direction;

[0039] The fourth connecting member connects the bottom wall and the tray.

[0040] In a possible implementation, a second sealing member is further included, the second sealing member extends along the circumference of the tray, and the second sealing member abuts between the bottom wall and the tray.

[0041] In a possible implementation, the third interface member and the second interface member are both connected to the housing, and the third interface member and the second interface member are located on the same side of the housing;

[0042] The first interface component is connected to a side of the first cold plate facing away from the battery pack.

[0043] In a second aspect, the present application further provides an electrical device, comprising the battery pack and an electrical device provided in the first aspect above, wherein the battery pack is used to supply power to the electrical device.

[0044] An embodiment of the present application provides a battery pack and an electrical device. The battery pack may include a housing, a battery pack unit, and a cold plate assembly. The housing includes a receiving cavity. The battery pack unit includes multiple battery packs. The cold plate assembly includes a cold plate unit and a third cold plate. By providing a receiving cavity for accommodating the battery pack unit, and by providing at least two battery packs along a first direction, the space of the battery pack in the first direction is fully utilized, thereby increasing the total capacity of the battery pack. By providing a cold plate unit for dissipating heat for the outermost battery pack of the battery pack unit along the first direction, and by providing a third cold plate for dissipating heat for the sides of two adjacent battery packs close to each other, the third cold plate can dissipate heat for the two adjacent battery packs at the same time, thereby improving the heat dissipation effect of the battery pack. Therefore, the battery pack of the embodiment of the present application has a better heat dissipation effect.

[0045] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the battery pack and electrical equipment provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0047] Figure 1 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0048] Figure 2 An exploded view of a battery pack provided in an embodiment of the present application;

[0049] Figure 3 Another exploded view of the battery pack provided in an embodiment of the present application;

[0050] Figure 4 for Figure 1 A partial enlarged view of the dotted circle in the middle;

[0051] Figure 5 for Figure 3 A partial enlarged view of the dotted circle in the middle;

[0052] Figure 6 A schematic structural diagram of a first battery pack, a first cold plate, a first side beam, and a first interface member in a battery pack provided in an embodiment of the present application;

[0053] Figure 7 A schematic diagram of the structure of the second cold plate, second side beam and tray in the battery pack provided in an embodiment of the present application;

[0054] Figure 8 Another structural schematic diagram of a battery pack provided in an embodiment of the present application;

[0055] Figure 9 for Figure 7 A partial enlarged view of the dotted box in the middle.

[0056] Reference numerals:

[0057] 100-shell; 110-accommodating chamber; 120-upper cover; 121-top wall; 1211-first connecting hole; 1212-avoidance opening; 122-bottom wall; 130-tray; 140-first side beam; 150-second side beam; 200-battery pack; 200a-first battery pack; 200b-second battery pack; 210-battery cell; 211-electrode lead-out portion; 300-cold plate assembly; 310-first cold plate; 320-second cold plate; 330-third cold plate; 340-first interface part; 350-second interface part; 360-third interface part; 400-connecting assembly; 410-first connecting part; 420-second connecting part; 430-third connecting part; 440-fourth connecting part; 500-sealing assembly; 510-first sealing part; 520-second sealing part.

[0058] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0061] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0062] The terms "first," "second," and "third" (if any) in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the application described herein can, for example, be implemented in an order other than that illustrated or described herein.

[0063] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0064] A battery pack may include a body and several battery packs, each of which may include multiple battery cells. The body has an inner cavity, housing several battery cell modules. To dissipate heat from the battery pack, the battery pack may also include a cold plate. This cold plate is in thermal contact with the battery pack, cooling the individual battery cells in the pack to prevent them from overheating.

[0065] In the related art, two battery packs are arranged one above and one below in the height direction of the battery pack. At this time, two heat dissipation cold plates are respectively arranged on the side of the two battery packs facing away from each other, and the cooling liquids of the two heat dissipation cold plates are coupled together, resulting in poor heat dissipation effect of the battery pack.

[0066] In view of this, the battery pack provided in the embodiment of the present application sets a third cold plate between two adjacent battery groups, so that the third cold plate can dissipate heat and cool the two adjacent battery groups at the same time, and the first cold plate can dissipate heat and cool the first battery group of the multiple battery groups, and the second cold plate can dissipate heat and cool the last battery group of the multiple battery groups. In this way, the first cold plate, the third cold plate and the second cold plate work together to improve the heat dissipation effect of the battery pack.

[0067] The specific implementation of the battery pack and the electrical equipment provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0068] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application provides a battery pack, which may include a shell 100, a battery pack unit and a cold plate assembly 300, the shell 100 has a accommodating cavity 110, the battery pack unit includes at least two battery packs 200, and the at least two battery packs 200 are arranged in the accommodating cavity 110 along a first direction.

[0069] The cold plate assembly 300 includes a cold plate unit and at least one third cold plate 330. The cold plate unit is disposed on one or both sides of the battery pack unit along the first direction and is used to dissipate heat for the adjacent battery packs 200. The at least one third cold plate 330 is disposed between two adjacent battery packs 200 in the battery pack unit and is used to dissipate heat for the two adjacent battery packs 200.

[0070] It should be noted that the cold plate unit includes at least one of the first cold plate 310 and the second cold plate 320. When the cold plate unit includes the first cold plate 310 and the second cold plate 320, the first cold plate 310 and the second cold plate 320 are arranged along the first direction. The first cold plate 310 can be arranged on one side of the battery pack unit along the first direction, and the second cold plate 320 can be arranged on the other side of the battery pack unit along the first direction.

[0071] That is, the first cold plate 310 is disposed on a side of a first battery pack 200 of the at least two battery packs 200 that faces away from the other battery packs 200, and is used to dissipate heat for the first battery pack 200. The second cold plate 320 is disposed on a side of a last battery pack 200 of the at least two battery packs 200 that faces away from the other battery packs 200, and is used to dissipate heat for the last battery pack 200.

[0072] In this embodiment, the housing 100 defines a housing cavity 110 for accommodating two or more battery packs 200. At least two battery packs 200 may be arranged along a first direction (see the X direction in the accompanying drawings).

[0073] For example, two battery packs 200 are stacked along a first direction, the battery pack 200 on the upper layer is the first battery pack 200, and the battery pack 200 on the lower layer is the last battery pack 200. The first cold plate 310 is located on the side of the first battery pack 200 away from the last battery pack 200 and is used to dissipate heat for the first battery pack 200. The second cold plate 320 is located on the side of the last battery pack 200 away from the first battery pack 200 and is used to dissipate heat for the last battery pack 200. A third cold plate 330 is arranged between the first battery pack 200 and the last battery pack 200 and is used to dissipate heat for the first battery pack 200 and the last battery pack 200 at the same time.

[0074] Alternatively, three battery packs 200 are stacked in sequence along a first direction, the battery pack 200 located on the top layer is the first battery pack 200, and the battery pack 200 located on the bottom layer is the last battery pack 200, a third cold plate 330 can be set between the first battery pack 200 and the middle battery pack 200, and is used to dissipate heat for the first battery pack 200 and the last battery pack 200 at the same time, and another third cold plate 330 can be set between the middle battery pack 200 and the last battery pack 200, and is used to dissipate heat for the middle battery pack 200 and the last battery pack 200 at the same time.

[0075] Each battery pack 200 may include multiple battery cells 210. The multiple battery cells 210 in each battery pack 200 may be connected in series, in parallel, or in a combination thereof, which is not limited in this embodiment. Thus, a single battery pack 200 composed of multiple battery cells 210 can provide a larger capacity, and when multiple battery packs 200 are electrically connected, they can form a battery pack with a longer battery life.

[0076] Reference Figure 1 and Figure 2As shown, for ease of understanding, the following embodiments are described using a battery pack having two battery groups 200 as an example. The two battery groups 200 may include a first battery group 200a and a second battery group 200b. The first battery group 200a and the second battery group 200b are arranged in the accommodating cavity 110 along a first direction.

[0077] The first cold plate 310 is located on a side of the first battery pack 200a facing away from the second battery pack 200b, and the first cold plate 310 is in thermal contact with the first battery pack 200a. The third cold plate 330 is located between the first battery pack 200a and the second battery pack 200b, and opposite surfaces of the third cold plate 330 are in thermal contact with the first battery pack 200a and the second battery pack 200b, respectively. The second cold plate 320 is disposed on a side of the second battery pack 200b facing away from the first battery pack 200a, and the second cold plate 320 is in thermal contact with the second battery pack 200b.

[0078] It is understandable that the first battery pack 200a and the second battery pack 200b can be stacked up and down, thereby fully utilizing the space of the battery pack in the first direction to increase the total capacity of the battery pack.

[0079] The cold plate assembly 300 is used to dissipate heat for each battery cell 210 in the battery pack 200. It is understandable that since the battery cells 210 inevitably generate a lot of heat during charging and discharging, if the temperature of the battery cells 210 is not controlled, it may cause safety problems in the battery pack.

[0080] In this embodiment, the first cold plate 310, the third cold plate 330, and the second cold plate 320 are arranged in sequence along the first direction. The first cold plate 310 is arranged on a side of the first battery group 200a facing away from the second battery group 200b and is in thermal contact with the first battery group 200a. The first cold plate 310 is used to dissipate heat and cool the side of the first battery group 200a facing away from the second battery group 200b. The second cold plate 320 is arranged on a side of the second battery group 200b facing away from the first battery group 200a and is in thermal contact with the second battery group 200b. The second cold plate 320 is used to dissipate heat for the side of the second battery group 200b facing away from the first battery group 200a.

[0081] Because the third cold plate 330 is disposed between the first cold plate 310 and the second cold plate 320, one side of the third cold plate 330 can be in thermal contact with the first battery pack 200a, thereby dissipating heat from the side of the first battery pack 200a facing the second battery pack 200b. This allows heat to be dissipated from both sides of the first battery pack 200a in the first direction through the first cold plate 310 and the third cold plate 330, respectively. The other side of the third cold plate 330 can be in thermal contact with the second battery pack 200b, thereby dissipating heat from the side of the second battery pack 200b facing the first battery pack 200a. This allows heat to be dissipated from both sides of the second battery pack 200b in the first direction through the third cold plate 330 and the second cold plate 320, respectively. The third cold plate 330 can dissipate heat for the first battery pack 200a and the second battery pack 200b at the same time. The first cold plate 310, the third cold plate 330, and the second third cold plate 330 work together to effectively improve the heat dissipation effect of the first battery pack 200a and the second battery pack 200b, thereby improving the heat dissipation effect of the battery pack.

[0082] It should be noted that, in order to improve the heat conduction effect, a layer of thermal conductive glue can be provided between the first cold plate 310 and the first battery group 200a, between the first battery group 200a and the third cold plate 330, between the third cold plate 330 and the second battery group 200b, and between the second battery group 200b and the second cold plate 320. In this way, the heat conduction efficiency between the cold plate assembly 300 and the battery group 200 can be improved, and the thermal conductive glue can bond the cold plate assembly 300 and the battery group 200 together, thereby fixing the battery group 200.

[0083] It should be understood that when the battery pack is provided with three battery groups 200 in sequence along the up and down directions, the first cold plate 310 is located at the top of the uppermost battery group 200, the second cold plate 320 is located at the bottom of the lowermost battery group 200, and the number of the third cold plates 330 can be two, one third cold plate 330 is located between the uppermost battery group 200 and the middle battery group 200, and the other third cold plate 330 is located between the middle battery group 200 and the lowermost battery group 200.

[0084] The battery pack provided in an embodiment of the present application may include a housing 100, a battery pack 200, and a cold plate assembly 300. The housing 100 includes a receiving cavity 110, and the cold plate assembly 300 includes a first cold plate 310, a second cold plate 320, and a third cold plate 330. The receiving cavity 110 is provided for accommodating the battery pack 200. At least two battery packs 200 are arranged along a first direction to fully utilize the space in the battery pack in the first direction, thereby increasing the total capacity of the battery pack. The first cold plate 310 is provided for dissipating heat from a side of a first battery pack 200 of the at least two battery packs 200 facing away from the other battery packs 200. The second cold plate 320 is provided for dissipating heat from a side of a last battery pack 200 of the at least two battery packs 200 facing away from the other battery packs 200. The third cold plate 330 is provided for dissipating heat from the adjacent sides of two adjacent battery packs 200. Thus, the third cold plate 330 can dissipate heat from both adjacent battery packs 200 simultaneously, thereby improving the heat dissipation effect of the battery packs 200. Therefore, the battery pack of the embodiment of the present application has a better heat dissipation effect.

[0085] Reference Figure 3 As shown, in one possible implementation, the cold plate assembly 300 also includes a first interface component 340, a second interface component 350 and a third interface component 360, the first interface component 340 is connected to the flow channel of the first cold plate 310, the second interface component 350 is connected to the flow channel of the second cold plate 320, and the third interface component 360 is connected to the flow channel of the third cold plate 330.

[0086] In this way, cooling liquid can be independently input and output for the first cold plate 310 through the first interface part 340, cooling liquid can be independently input and output for the second cold plate 320 through the second interface part 350, and cooling liquid can be independently input and output for the third cold plate 330 through the third interface part 360. That is to say, the first cold plate 310, the second cold plate 320 and the third cold plate 330 can be controlled independently of each other without being coupled together, thereby improving the heat dissipation efficiency of the battery pack 200 and thus improving the heat dissipation effect of the battery pack.

[0087] For example, when the battery pack is performing high-rate charge and discharge, the battery pack 200 generates significant heat. The first, second, and third cold plates 310, 320, and 330 can be controlled to operate simultaneously. When the battery pack is performing low-rate charge and discharge, only the third cold plate 330 can be controlled to operate. This allows targeted control of one or more of the first, second, and third cold plates 310, 320, and 330 according to different operating conditions, thereby improving the operating efficiency of the cold plate assembly 300.

[0088] Reference Figure 2 、 Figure 4As shown, in a possible implementation, the housing 100 includes an upper cover 120 and a tray 130 . The upper cover 120 and the tray 130 are connected to define a receiving cavity 110 . The first cold plate 310 is connected to the upper cover 120 .

[0089] It is understandable that, in order to facilitate assembly, the shell 100 needs to be divided into an upper cover 120 and a tray 130. After the battery pack 200 is installed on the tray 130, the upper cover 120 is connected to the tray 130, and then the battery pack 200 is accommodated in the accommodating cavity 110 defined by the upper cover 120 and the tray 130.

[0090] Among them, the first cold plate 310 can be integrated with the upper cover 120 to shorten the distance between the first cold plate 310 and the upper cover 120 in the first direction, or make the first cold plate 310 and the upper cover 120 seamlessly connected in the first direction, thereby making full use of the space of the battery pack in the first direction to reduce the invalid volume, thereby improving the volume energy density of the battery pack.

[0091] Reference Figures 2 to 4 As shown, in some embodiments, the upper cover 120 includes a top wall 121 and a bottom wall 122 connected to each other, and the top wall 121 and the bottom wall 122 are located at two ends of the upper cover 120 along the first direction. The first cold plate 310 is connected to the top wall 121, and the tray 130 is connected to the bottom wall 122.

[0092] It should be noted that the battery pack may further include a connecting assembly 400. The first cold plate 310 may be integrated with the top wall 121 through the connecting assembly 400, so that after the first cold plate 310 is integrated with the upper cover 120, the free space of the battery pack can be reduced. The tray 130 may also be connected to the bottom wall 122 through the connecting assembly 400, so that the tray 130 and the upper cover 120 are connected together.

[0093] Reference Figures 2 to 5 As shown, in a possible implementation, the connection assembly 400 may include a plurality of first connection members 410 and a plurality of second connection members 420 , wherein the plurality of first connection members 410 are spaced apart along the circumference of the first cold plate 310 .

[0094] One end of the first connector 410 is connected to the first cold plate 310 , and the other end of the first connector 410 passes through the top wall 121 to be connected to the second connector 420 . The second connector 420 is stopped at the outer side of the top wall 121 .

[0095] It can be understood that since the first cold plate 310 can be arranged perpendicular to the first direction, the circumference of the first cold plate 310 can include at least one of the second direction (refer to the Y direction in the drawings) and the third direction (refer to the Z direction in the drawings).

[0096] In specific settings, several first connecting members 410 can be spaced apart along the second direction, or several first connecting members 410 can be spaced apart along the third direction, or several first connecting members 410 can be spaced apart along the second direction and the third direction.

[0097] One end of the first connecting member 410 can be welded to the first cold plate 310, and then the first connecting member 410 is fixedly connected to the side of the first cold plate 310 facing away from the first battery pack 200a. The other end of the first connecting member 410 is then passed through the top wall 121 and connected to the second connecting member 420, and the second connecting member 420 is stopped on the outside of the top wall 121. The connection between the first cold plate 310 and the top wall 121 can be achieved, and the first cold plate 310 can be integrated into the upper cover 120, so that the structure of the battery pack in the first direction is more compact.

[0098] In some embodiments, the plurality of first connectors 410 are welded to a side of the first cold plate 310 facing away from the first battery pack 200 a . The first connectors 410 have first external threads, and the second connectors 420 have first internal threads matching the first external threads.

[0099] The top wall 121 has a plurality of first connection holes 1211 , and each first connection member 410 passes through the corresponding first connection hole 1211 to be threadedly connected to the corresponding second connection member 420 .

[0100] In this way, multiple first connecting members 410 can pass through the corresponding first connecting holes 1211 to be threadedly connected to multiple second connecting members 420 one by one, and each second connecting member 420 can be stopped on the outside of the top wall 121, and then the first connecting member 410 and the second connecting member 420 can cooperate to connect the first cold plate 310 and the top wall 121, so that the first cold plate 310 and the upper cover 120 are integrated together.

[0101] Reference Figure 3 As shown, in a possible implementation, the top wall 121 has an avoidance opening 1212 , and the projection of the first cold plate 310 on the top wall 121 covers the avoidance opening 1212 .

[0102] This configuration allows the upper cover 120 to save some material, thereby reducing the cost of the battery pack. Furthermore, because the projection of the first cold plate 310 on the top wall 121 covers the avoidance opening 1212, the first cold plate 310 can be closed and a portion of the first cold plate 310 can be exposed, facilitating connection of the first cold plate 310 to a heat sink. The heat sink can provide circulating cooling liquid for the first cold plate 310, the second cold plate 320, and the third cold plate 330.

[0103] In order to improve the sealing performance of the battery pack, in one possible implementation, the battery pack may further include a sealing assembly 500. The sealing assembly 500 may include a first sealing member 510. The first sealing member 510 abuts between the top wall 121 and the first cold plate 310 to seal the gap between the top wall 121 and the first cold plate 310, thereby preventing foreign matter such as water vapor from entering the accommodating cavity 110 through the gap between the top wall 121 and the first cold plate 310.

[0104] The first sealing member 510 may be provided along the circumference of the avoidance opening 1212 , thereby effectively improving the sealing performance between the top wall 121 and the first cold plate 310 .

[0105] Reference Figure 6 As shown, in one possible implementation, the shell 100 further includes at least one first side beam 140, the at least one first side beam 140 extends along the second direction, the at least one first side beam 140 is connected to the side of the first cold plate 310 facing the first battery group 200a, and the at least one first side beam 140 is located on the outside of the first battery group 200a.

[0106] It can be understood that the upper cover 120 can have a first cavity, the tray 130 can have a second cavity, and the upper cover 120 and the tray 130 are open at one end facing each other. After the upper cover 120 and the tray 130 are connected, the first cavity and the second cavity together constitute the accommodating cavity 110.

[0107] For example, both first side beams 140 extend along the second direction, and the two first side beams 140 are arranged at intervals along the third direction. In this way, after the two first side beams 140 are connected to the side of the first cold plate 310 facing the first battery group 200a, the two first side beams 140 can divide the first cavity into three first sub-cavities, and the three first sub-cavities are arranged along the third direction. The two first side beams 140 can be arranged on both sides of the first battery group 200a along the third direction, thereby limiting the position of the first battery group 200a in the third direction through the two first side beams 140.

[0108] During assembly, the first connecting member 410 and the first side beam 140 can be welded to the opposite sides of the first cold plate 310 respectively, and then connected to the top wall 121 through the first connecting member 410, thereby integrating the first cold plate 310, the first side beam 140 and the upper cover 120 together.

[0109] In some embodiments, the second cold plate 320 is connected to the tray 130 , and the top wall 121 and the tray 130 are both connected to the third cold plate 330 .

[0110] It should be noted that the tray 130 may include a frame and a bottom plate, or the tray 130 may include a frame. After the second cold plate 320 is connected to the frame, the second cold plate 320 can serve as the bottom plate of the tray 130. The third cold plate 330 can serve as a support structure for the first battery pack 200a, thereby simplifying the internal structure of the battery pack. When the third cold plate 330 is connected to the top wall 121 and the tray 130, it can restrict the position of the first battery pack 200a and the second battery pack 200b in the first direction, thereby effectively fixing the battery packs 200.

[0111] Reference Figure 7 As shown, in one possible implementation, the shell 100 also includes at least one second side beam 150, at least one second side beam 150 extends along the second direction, at least one second side beam 150 is connected to the tray 130, at least one first side beam 140 and at least one second side beam 150 are correspondingly arranged on both sides of the third cold plate 330 along the first direction, and at least one second side beam 150 is located on the outside of the second battery group 200b.

[0112] That is to say, the second side beam 150 can divide the second cavity of the tray 130 into multiple second sub-cavities, and the multiple second sub-cavities are arranged along the third direction. The first side beam 140 can be set on at least one side of the second battery group 200b along the third direction, and then the position of the second battery group 200b in the third direction is limited by the first side beam 140.

[0113] Reference Figure 2 、 Figure 8 and Figure 9 As shown, in a possible implementation, a plurality of third connecting members 430 are further included. In the first direction, the third connecting members 430 sequentially connect the top wall 121 , the first side beam 140 , the third cold plate 330 and the second side beam 150 .

[0114] In this way, after the third connecting member 430 is connected to the top wall 121, the first side beam 140, the third cold plate 330 and the second side beam 150 in sequence, since the first cold plate 310 is connected to the top wall 121 and the second cold plate 320 is connected to the tray 130, the first battery group 200a is sandwiched between the first cold plate 310 and the third cold plate 330. The first cold plate 310 and the third cold plate 330 can jointly limit the position of the first battery group 200a in the first direction, and the two first side beams 140 can limit the position of the first battery group 200a in the third direction.

[0115] The second battery pack 200b is sandwiched between the third cold plate 330 and the second cold plate 320. Together, the third cold plate 330 and the second cold plate 320 restrict the position of the second battery pack 200b in the first direction, while the two second side beams 150 restrict the position of the second battery pack 200b in the third direction. Furthermore, because the third cold plate 330 is secured to the housing 100 via the third connector 430, and both the first and second battery packs 200a, 200b are bonded to the third cold plate 330, the freedom of movement of the first and second battery packs 200a, 200b can be fully and reliably restricted.

[0116] In some embodiments, the top wall 121 has a second connecting hole, the first side beam 140 has a third connecting hole, the third cold plate 330 has a fourth connecting hole, the second side beam 150 has a fifth connecting hole, the third connecting member 430 has a second external thread, and the fifth connecting hole has a second internal thread matching the second external thread.

[0117] The third connecting member 430 passes through the second connecting hole, the third connecting hole and the fourth connecting hole in sequence to be threadedly connected to the fifth connecting hole.

[0118] In this way, when the third connecting member 430 passes through the second connecting hole, the third connecting hole, and the fourth connecting hole in sequence and is threadedly connected to the fifth connecting hole, the top wall 121, the first side beam 140, the third cold plate 330, and the second side beam 150 are securely connected. Furthermore, when the battery pack requires maintenance, the third connecting members 430 can be loosened to disconnect them from the fifth connecting hole, thereby facilitating the opening of the upper cover 120.

[0119] In a possible implementation, the plurality of battery cells 210 are arranged along the third direction. The battery cells 210 include electrode lead-out portions 211 , which are located at at least one end of the battery cells 210 along the second direction.

[0120] The first connector 410 is connected to both sides of the upper cover 120 along the second direction, and the third connector 430 is connected to both sides of the upper cover 120 along the third direction. Thus, the first connector 410, the second connector 420, and the first connection hole 1211 cooperate to connect the top wall 121 and the first cold plate 310. This eliminates the need for additional side beams or other structures at both ends of the battery cell 210 along the second direction, thereby simplifying the battery pack structure.

[0121] The third connecting member 430, the second connecting hole, the third connecting hole, the fourth connecting hole and the fifth connecting hole cooperate to connect the top wall 121, the first side beam 140, the third cold plate 330 and the second side beam 150. Therefore, the third connecting member 430 needs to be fully inserted into the accommodating cavity 110. The third connecting member 430 is arranged on both sides of the upper cover 120 along the third direction to prevent the third connecting member 430 from interfering with the electrode lead-out portion 211.

[0122] Reference Figure 2 As shown, in one possible implementation, the connection assembly 400 further includes a plurality of fourth connection members 440, which are spaced apart along at least one of the second direction and the third direction. The fourth connection members 440 connect the bottom wall 122 and the tray 130. The first direction, the second direction, and the third direction are perpendicular to each other.

[0123] It is understandable that the circumference of the tray 130 may include a second direction and a third direction, and the plurality of fourth connecting members 440 may be arranged around the circumference of the tray 130 to reliably connect the bottom wall 122 and the tray 130 .

[0124] Exemplarily, the first connecting member 410 can be a back-welded stud, the second connecting member 420 can be a nut, the third connecting member 430 can be a long bolt, and the fourth connecting member 440 can be a screw. When the battery pack needs to be repaired, the screws can be loosened to disconnect the bottom wall 122 and the tray 130, disconnect the nut from the back-welded stud from the threaded connection, and disconnect the long bolt from the second side beam 150 from the threaded connection. In this way, the upper cover 120 can be opened more conveniently to facilitate repair of the battery pack 200, etc., thereby improving the maintainability of the battery pack.

[0125] As shown in FIG. 2 , in a possible implementation, the sealing assembly 500 may further include a second sealing member 520 . The second sealing member 520 extends along the circumference of the tray 130 , and the second sealing member 520 abuts between the bottom wall 122 and the tray 130 .

[0126] In this way, the second sealing member 520 can seal the gap between the bottom wall 122 and the tray 130 to prevent moisture and the like from entering the accommodating cavity 110 through the gap between the bottom wall 122 and the tray 130 .

[0127] Reference Figure 3 As shown, in one possible implementation, the third interface member 360 and the second interface member 350 are both connected to the tray 130, and the third interface member 360 and the second interface member 350 are located on the same side of the tray 130, and the first interface member 340 is connected to the side of the first cold plate 310 facing away from the first battery pack 200a.

[0128] This arrangement facilitates the heat dissipation device to provide cooling liquid to the first cold plate 310, the second cold plate 320, and the third cold plate 330. The first interface member 340 can communicate directly with the flow channel of the first cold plate 310 without requiring an intermediate pipe, thereby simplifying the structure of the battery pack. Furthermore, the first interface member 340 can be exposed through the avoidance opening 1212, facilitating insertion and removal of the first interface member 340.

[0129] In addition, the present application also provides an electrical device, comprising the battery pack and an electrical device provided in the aforementioned embodiment, wherein the battery pack is used to power the electrical device. The structure and operating principle of the battery pack have been described in the aforementioned embodiment and will not be repeated here.

[0130] For example, the electrical equipment may be a vehicle, the electrical device may be an electric motor, and the battery pack may provide electrical energy to the electric motor, thereby driving the vehicle. The vehicle may be a pure electric vehicle, an extended-range electric vehicle, a hybrid electric vehicle, or any other vehicle equipped with a battery pack, which is not limited in this embodiment.

[0131] 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.

Claims

1. A battery pack, characterized in that: include: A housing (100), wherein the housing (100) has a receiving cavity (110); A battery pack unit, the battery pack unit being accommodated in the accommodating cavity (110), the battery pack unit comprising at least two battery packs (200), the at least two battery packs (200) being arranged in sequence along a first direction; A cold plate assembly (300), the cold plate assembly (300) comprising: a cold plate unit, the cold plate unit being arranged on at least one side of the battery pack unit along the first direction and being used to dissipate heat for the battery pack (200) arranged adjacent thereto; At least one third cold plate (330), wherein the at least one third cold plate (330) is arranged between two adjacent battery packs (200) of the battery pack unit and is used to dissipate heat for the two adjacent battery packs (200).

2. The battery pack according to claim 1, wherein: The cold plate unit comprises a first cold plate (310), the first cold plate (310) being arranged on one side of the battery pack unit along the first direction and used to dissipate heat for the battery pack (200) arranged adjacent thereto; And / or, the cold plate unit includes a second cold plate (320), and the first cold plate (310) is arranged on the other side of the battery pack unit along the first direction and is used to dissipate heat for the battery pack (200) arranged adjacent thereto.

3. The battery pack according to claim 2, wherein: The cold plate assembly (300) further comprises a first interface component (340), a second interface component (350) and a third interface component (360), wherein the first interface component (340) is in communication with the flow channel of the first cold plate (310), the second interface component (350) is in communication with the flow channel of the second cold plate (320), and the third interface component (360) is in communication with the flow channel of the third cold plate (330).

4. The battery pack according to claim 2, wherein: The housing (100) comprises an upper cover (120) and a tray (130), wherein the upper cover (120) and the tray (130) are connected to jointly define the accommodating cavity (110); The first cold plate (310) is connected to the upper cover (120).

5. The battery pack according to claim 4, characterized in that: The upper cover (120) comprises a top wall (121) and a bottom wall (122) connected to each other, wherein the top wall (121) and the bottom wall (122) are located at two ends of the upper cover (120) along the first direction; The first cold plate (310) is connected to the top wall (121), and the tray (130) is connected to the bottom wall (122).

6. The battery pack according to claim 5, characterized in that: It also includes a plurality of first connecting members (410) and a plurality of second connecting members (420), wherein the plurality of first connecting members (410) are arranged at intervals along at least one of the second direction and the third direction; One end of the first connecting member (410) is connected to the first cold plate (310), and the other end of the first connecting member (410) passes through the top wall (121) to be connected to the second connecting member (420), and the second connecting member (420) is stopped at the outer side of the top wall (121); The first direction, the second direction and the third direction are perpendicular to each other.

7. The battery pack according to claim 6, characterized in that: A plurality of first connecting members (410) are welded to a side of the first cold plate (310) facing away from the battery pack (200), the first connecting member (410) having a first external thread, and the second connecting member (420) having a first internal thread matching the first external thread; The top wall (121) has a plurality of first connection holes (1211), and each first connection member (410) passes through the corresponding first connection hole (1211) to be threadedly connected to the corresponding second connection member (420).

8. The battery pack according to claim 5, characterized in that: The top wall (121) has an avoidance opening (1212), and the projection of the first cold plate (310) on the top wall (121) covers the avoidance opening (1212).

9. The battery pack according to claim 8, characterized in that: The first sealing member (510) further includes a first sealing member (510), the first sealing member (510) extending along the circumference of the avoidance opening (1212), and the first sealing member (510) abutting between the top wall (121) and the first cold plate (310) to seal the gap between the top wall (121) and the first cold plate (310).

10. The battery pack according to claim 6, characterized in that: The at least two battery groups (200) include a first battery group (200a) and a second battery group (200b), wherein the first battery group (200a) and the second battery group (200b) are arranged along the first direction; The first cold plate (310) is located on a side of the first battery group (200a) facing away from the second battery group (200b), and the first cold plate (310) is in thermal contact with the first battery group (200a); The second cold plate (320) is arranged on a side of the second battery group (200b) facing away from the first battery group (200a), and the second cold plate (320) is in thermal contact with the second battery group (200b); The third cold plate (330) is located between the first battery group (200a) and the second battery group (200b), and two opposite surfaces of the third cold plate (330) are in thermal contact with the first battery group (200a) and the second battery group (200b), respectively.

11. The battery pack according to claim 10, wherein: The invention also includes at least one first side beam (140), wherein the at least one first side beam (140) extends along the second direction, the at least one first side beam (140) is connected to a side of the first cold plate (310) facing the first battery pack (200a), and the at least one first side beam (140) is located outside the first battery pack (200a).

12. The battery pack according to claim 11, wherein: There are two first side beams (140), and the two first side beams (140) are arranged on both sides of the first battery pack (200a) along the third direction.

13. The battery pack according to claim 11, wherein: The second cold plate (320) is connected to the tray (130), and the top wall (121) and the tray (130) are both connected to the third cold plate (330).

14. The battery pack according to claim 13, wherein: The invention also includes at least one second side beam (150), at least one second side beam (150) extending along the second direction, at least one second side beam (150) connected to the tray (130), at least one first side beam (140) and at least one second side beam (150) correspondingly arranged on both sides of the third cold plate (330) along the first direction, and at least one second side beam (150) located outside the second battery pack (200b).

15. The battery pack according to claim 14, characterized in that: It also includes a plurality of third connecting members (430), wherein in the first direction, the third connecting members (430) sequentially connect the top wall (121), the first side beam (140), the third cold plate (330), and the second side beam (150).

16. The battery pack according to claim 15, characterized in that: The top wall (121) has a second connecting hole, the first side beam (140) has a third connecting hole, the third cold plate (330) has a fourth connecting hole, the second side beam (150) has a fifth connecting hole, the third connecting member (430) has a second external thread, and the fifth connecting hole has a second internal thread matching the second external thread; The third connecting member (430) passes through the second connecting hole, the third connecting hole and the fourth connecting hole in sequence to be threadedly connected to the fifth connecting hole.

17. The battery pack according to claim 16, wherein: The first battery pack (200a) and the second battery pack (200b) each comprise a plurality of battery cells (210), wherein the plurality of battery cells (210) are arranged along the third direction; The battery cell (210) comprises an electrode lead-out portion (211), and the electrode lead-out portion (211) is located at at least one end of the battery cell (210) along the second direction; The first connecting member (410) is connected to both sides of the upper cover (120) along the second direction, and the third connecting member (430) is connected to both sides of the upper cover (120) along the third direction.

18. The battery pack according to claim 6, wherein: It also includes a plurality of fourth connecting members (440), wherein the plurality of fourth connecting members (440) are arranged at intervals along at least one of the second direction and the third direction; The fourth connecting member (440) connects the bottom wall (122) and the tray (130).

19. The battery pack according to claim 18, wherein: The tray (130) further includes a second sealing member (520), wherein the second sealing member (520) extends along the circumference of the tray (130), and the second sealing member (520) abuts between the bottom wall (122) and the tray (130).

20. The battery pack according to claim 3, wherein: The third interface component (360) and the second interface component (350) are both connected to the housing (100), and the third interface component (360) and the second interface component (350) are located on the same side of the housing (100); The first interface component (340) is connected to a side of the first cold plate (310) facing away from the battery pack (200).

21. An electrical device, characterized in that: Comprising the battery pack and an electrical device according to any one of claims 1 to 20, the battery pack is used to supply power to the electrical device.

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