Battery pack and power device

Abstract

The application relates to the technical field of battery manufacturing, and provides a battery pack and a power device. The battery pack of the application comprises a lower shell, a direct cooling plate, a first water gap module and a second water gap module; wherein the direct cooling plate and the first water gap module are arranged in the lower shell, the second water gap module is arranged outside the side wall of the lower shell, the first water gap module comprises a first connecting part connected with the direct cooling plate, a second connecting part connected with the second water gap module through the side wall, and a communication pipe connecting the first connecting part and the second connecting part, the communication pipe is made of metal material; the first connecting part and the direct cooling plate, the second connecting part and the side wall of the lower shell, and the second connecting part and the second water gap module are all sealed. The direct cooling plate can be built in the battery pack, the sealing property of the whole battery pack is ensured, and the use quality of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a battery pack and power unit. Background Technology

[0002] With the development of new energy technologies, the cooling system of battery packs has also been continuously developed. The common design of the current battery pack cooling system is to use built-in direct cooling plates for battery pack cooling. The pressure requirement of existing direct cooling plates is usually 2 MPa, and the burst pressure requirement is greater than 3 MPa. The cooling plate pipes commonly used in the industry are usually made of nylon, which has a low pressure resistance and can generally only withstand 1 MPa of pressure, which is difficult to meet the pressure requirements of existing direct cooling plates.

[0003] Therefore, the direct cooling plate nozzle can only be placed outside the battery pack and connected to the vehicle's electronic expansion valve. There is a sealing problem between the nozzle and the side wall of the battery pack, which is not conducive to achieving a seal between the direct cooling plate and the lower housing of the battery pack, and thus not conducive to improving the quality of the battery pack. Utility Model Content

[0004] In view of this, the present application aims to provide a battery pack that improves the quality of battery pack use.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A battery pack includes a lower housing, a direct cooling plate and a first water inlet module disposed in the lower housing, and a second water inlet module located on the outer side wall of the lower housing; The first sprue module includes a first connecting part connected to the direct cooling plate, a second connecting part connected to the second sprue module through the side wall, and a connecting pipe connecting the first connecting part and the second connecting part, wherein the connecting pipe is made of metal. The first connecting part and the direct cooling plate, the second connecting part and the lower housing side wall, and the second connecting part and the second water inlet module are all sealed together.

[0006] Furthermore, the first connecting part is provided with a cold plate connector that communicates with the connecting pipe; the straight cold plate is provided with a connector, the connector having a first connection port that communicates with the flow channel of the straight cold plate, and the cold plate connector is inserted into the first connection port.

[0007] Furthermore, a first sealing element is provided between the cold plate joint and the connecting member.

[0008] Furthermore, the first connecting portion and the connecting member are connected by a plurality of first screw-on assemblies.

[0009] Furthermore, each of the first screw-in components includes a first screw hole provided on the connector, a first through hole provided on the first connecting portion, and a first screw member passing through the first through hole and screwed into the first screw hole.

[0010] Furthermore, the connector is provided with a threaded insert, and the first threaded hole is formed on the threaded insert.

[0011] Furthermore, the second connecting portion and the sidewall are connected by a plurality of second screw-in assemblies; and / or, a second sealing element is provided between the second connecting portion and the sidewall, the second sealing element being a ring arranged circumferentially around the second connecting portion.

[0012] Furthermore, the second water inlet module includes a module body disposed on the outer side of the side wall, and a first connector and a second connector disposed at both ends of the module body. The first connector is connected to the connecting pipe through the second connecting part, and the second connector is used to connect to an external refrigeration system.

[0013] Furthermore, a second through hole is provided on the side wall, and a second connection port communicating with the connecting pipe is provided on the second connecting part. The first connector passes through the second through hole and is inserted into the second connection port; and / or, a third sealing element is provided between the first connector and the second connecting part.

[0014] Compared with related technologies, this application has the following advantages: (1) The battery pack described in this application can meet the pressure requirements of the direct cooling plate by making the connecting pipe a metal material. With the setting of the first water inlet module and the second water inlet module, the water inlet arrangement on the lower shell can be easily realized under the synergistic effect of the first water inlet module and the second water inlet module, which can meet the requirement of the direct cooling plate being built into the battery pack. Furthermore, by making the first connecting part, the second connecting part, the direct cooling plate and the side wall of the lower shell all sealed, the sealing requirements of the water inlet structure arranged on the lower shell can be ensured, and the overall sealing performance of the pack can also be ensured, thereby improving the overall safety of the pack.

[0015] (2) By setting up the cold plate joint and connector, it is easy to connect the connecting pipe and the straight cold plate, and the cold plate joint can be inserted into the first connection port, which facilitates the connection between the cold plate joint and the straight cold plate. The structure is simple and easy to design and implement.

[0016] (3) By providing a first sealing element between the cold plate joint and the connecting parts, it is easy to ensure the sealing effect between the cold plate joint and the connecting parts, and the structure is simple and easy to design and implement.

[0017] (4) By connecting the first connecting part and the connector through multiple first screw assemblies, it is convenient to assemble the first connecting part and the connector, and helps to ensure the connection strength of the first connecting part and the connector during the use of the battery pack.

[0018] (5) By making the first screw assembly include a first screw hole, a first through hole and a first screw element, the structure is simple, easy to process and manufacture, and conducive to design and implementation.

[0019] (6) By setting the threaded insert, it is convenient to arrange the first threaded hole on the connector, and it can reduce the processing difficulty, facilitate processing and manufacturing, and facilitate design implementation.

[0020] (7) By connecting the second connecting part and the side wall through multiple second screw components, it is easy to realize the assembly between the second connecting part and the side wall, and the connection strength between the second connecting part and the side wall can be ensured. At the same time, the setting of the second sealing element makes it easy to realize the sealing setting between the second connecting part and the side wall. The structure is simple, easy to process and manufacture, and helpful for design implementation.

[0021] (8) By making the second water inlet module include a module body, a first connector and a second connector, it is convenient to connect the second water inlet module with the first water inlet module and the external refrigeration system. Furthermore, by setting the module body, it is convenient to arrange the first connector and the second connector. The structure is simple, easy to process and manufacture, and conducive to design and implementation.

[0022] (9) The arrangement of the first connector is facilitated by the setting of the second through hole, and the first connector is inserted into the second connection port, which facilitates the connection between the first connector and the second connection port. The structure is simple and easy to design and implement. At the same time, by providing a third sealing element between the first connector and the second connection part, it is easy to achieve the sealing setting between the second connection part and the first connector. The structure is simple and easy to process and manufacture, which is helpful for design and implementation.

[0023] This application also proposes a power unit in which the aforementioned battery pack is provided.

[0024] The power device described in this application, through the battery pack arrangement as described above, has the same beneficial effects as the prior art, and therefore will not be repeated here. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the battery pack structure described in an embodiment of this application; Figure 2This is a schematic diagram of the first angle structure of the direct cooling plate and the first water inlet module of the battery pack described in the embodiment of this application; Figure 3 This is a schematic diagram of the second angle structure of the direct cooling plate and the first water inlet module of the battery pack described in the embodiment of this application; Figure 4 This is a schematic diagram of the direct cooling plate of the battery pack described in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the first gate module of the battery pack described in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the second gate module of the battery pack described in the embodiments of this application; Explanation of reference numerals in the attached figures: 1. Lower casing; 101. Bottom wall; 102. Side wall; 2. Straight-plate cooling; 201. First connection port; 202. Connector; 3. First water inlet module; 301. First connecting part; 302. Second connecting part; 303. Connecting pipe; 3011 Cold-rolled steel plate joint; 3021 Second connection port; 4. Second water inlet module; 401. Module body; 402. First connector; 403. Second connector; 5. First sealing element; 6. First screw-in assembly; 601, First threaded hole; 602, First through hole; 603, First threaded component; 7. Second screw assembly; 701. Second screw connector; 702. Second screw hole; 8. Second seal; 9. Third seal. Detailed Implementation

[0026] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and 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 on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0030] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0032] An embodiment of the first aspect of this application provides a battery pack that is used in a power unit, mainly for storing and releasing energy. The battery pack in this embodiment utilizes an innovative structural design to integrate a direct cooling plate into the battery pack and ensure the overall sealing of the pack, thereby improving the quality of the battery pack.

[0033] In related technologies, with the development of new energy technologies, the cooling system of battery packs has also been continuously developed. One of the main designs of the current battery pack cooling system is the built-in direct cooling plate, which is built into the lower shell of the battery pack and connected to the external cooling system. For battery packs using built-in direct cooling plates, the pressure requirement of the direct cooling plate is usually 2 MPa, and the burst pressure requirement is greater than 3 MPa. The cooling plate pipes commonly used in the industry are usually made of nylon, which has a low pressure resistance and can generally only withstand a pressure of 1 MPa, which is difficult to meet the pressure requirements of the existing direct cooling plates. Therefore, the direct cooling plate inlet can only be arranged outside the pack and assembled and connected to the vehicle's electronic expansion valve. There is a sealing problem between the inlet and the side wall of the battery pack, which is not conducive to achieving a seal between the direct cooling plate and the lower shell of the battery pack, and thus not conducive to improving the quality of battery pack use.

[0034] In view of this, in order to overcome the shortcomings of the related technology, the battery pack of this embodiment combines... Figures 1 to 6 As shown, the overall design includes a lower shell 1, a direct cooling plate 2, a first sprue module 3, and a second sprue module 4.

[0035] The direct cooling plate 2 and the first water inlet module 3 are both located inside the lower housing 1, and the second water inlet module 4 is located outside the side wall 102 of the lower housing 1. The first water inlet module 3 includes a first connecting part 301 connected to the direct cooling plate 2, a second connecting part 302 connected to the second water inlet module 4 through the side wall 102, and a connecting pipe 303 connecting the first connecting part 301 and the second connecting part 302. The connecting pipe 303 is made of metal. The first connecting part 301 and the direct cooling plate 2, the second connecting part 302 and the side wall 102 of the lower housing 1, and the second connecting part 302 and the second water inlet module 4 are all sealed together.

[0036] At this time, with the above configuration, the arrangement of the first water inlet module 3 and the second water inlet module 4, through their synergistic effect, facilitates the arrangement of water inlets on the lower housing 1. Furthermore, by ensuring that the first connecting part 301, the second connecting part 302, the direct cooling plate 2, and the side wall 102 of the lower housing 1 are all sealed, the sealing requirements of the water inlet structure arranged on the lower housing 1 can be ensured. At the same time, by making the connecting pipe 303 a metal material, the pressure requirements of the direct cooling plate 2 can be met, which not only meets the requirement of the direct cooling plate 2 being built into the battery pack, but also ensures the overall sealing of the pack, thereby improving the overall safety of the pack.

[0037] Based on the above general introduction, specifically, the battery pack in this embodiment generally includes a lower housing 1, a battery module, and an upper housing.

[0038] The upper and lower housings 1 each have a receiving cavity, in which the battery module is housed. The upper housing covers the lower housing 1. The connection between the upper and lower housings 1 and the arrangement of the battery module within the lower housing 1 can be referenced from the connection methods (such as screw connections) and arrangements in existing battery packs, and will not be elaborated further here.

[0039] The upper and lower housings 1 have a bottom wall 101 and a side wall 102 extending upward from the edge of the bottom wall 101 along the height direction of the lower housing 1. A direct cooling plate 2 is disposed on the bottom wall 101. The first connecting part 301 of the first water inlet module 3 is disposed on the direct cooling plate 2. The second connecting part 302 of the first water inlet module 3 and the second water inlet module 4 are both disposed on the side wall 102. The first connecting part 301 and the second connecting part of the first water inlet module 3 are connected by a connecting pipe 303. The connecting pipe 303 is made of metal (such as aluminum alloy).

[0040] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, provide a cold plate connector 3011 on the first connection portion 301 that communicates with the connecting pipe 303.

[0041] The direct cooling plate 2 is provided with a connector 202, which has a first connection port 201 that communicates with the flow channel of the direct cooling plate 2, and the cold plate connector 3011 is inserted into the first connection port 201.

[0042] It is understandable that the cold plate connector 3011 and the connector 202 facilitate the connection between the connecting pipe 303 and the straight cold plate 2, and allow the cold plate connector 3011 to be inserted into the first connection port 201, which facilitates the connection between the cold plate connector 3011 and the straight cold plate 2. The structure is simple and easy to design and implement.

[0043] In specific implementation, the above connector 202 is provided on the direct cooling plate 2 and is used to connect with the cold plate connector 3011 of the first connecting part 301. The above cold plate connector 3011 can be inserted into the first connecting port 201 of the connector 202. The insertion and engagement form of the cold plate connector 3011 and the first connecting port 201 can refer to the insertion and engagement form of the direct cooling plate 2 and the connecting structure in the existing battery pack, and will not be described in detail here.

[0044] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, provide a first seal 5 between the cold plate joint 3011 and the connector 202.

[0045] It is understandable that by providing a first sealing element 5 between the cold plate joint 3011 and the connector 202, the sealing effect between the cold plate joint 3011 and the connector 202 can be easily ensured, and the structure is simple and easy to design and implement.

[0046] In specific implementation, the first sealing element 5 can be, for example, a sealing ring fitted on the cold plate joint 3011. The cold plate joint 3011 is provided with a groove that can accommodate the first sealing element 5. Correspondingly, the connector 202 is also provided with a groove that mates with the sealing ring. When the cold plate joint 3011 is inserted into the first connection port 201, the sealing ring is located in the sealing cavity formed by the groove and the groove.

[0047] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, allow the first connection 301 and the connector 202 to be connected by a plurality of first screw assemblies 6.

[0048] It is understandable that by connecting the first connecting part 301 and the connector 202 through a plurality of first screw assemblies 6, it is convenient to assemble the first connecting part 301 and the connector 202, and helps to ensure the connection strength of the first connecting part 301 and the connector 202 during the use of the battery pack.

[0049] In specific implementation, the first connecting part 301 and the connecting member 202 are arranged according to the shape, and the connecting member 202 is fixed (such as by welding) on ​​the direct cooling plate 2. The first connecting part 301 and the connecting member 202 have mating surfaces that can abut together, and the mating surfaces of the first connecting part 301 and the connecting member 202 are also sealed.

[0050] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, include each first screw assembly 6 including a first screw hole 601 provided on the connector 202, a first through hole 602 provided on the first connecting portion 301, and a first screw member 603 passing through the first through hole 602 and screwed into the first screw hole 601.

[0051] It is understandable that by making the first screw assembly 6 include the first screw hole 601, the first through hole 602 and the first screw member 603, the structure is simple, easy to process and manufacture, and conducive to design and implementation.

[0052] In practical implementation, the first through hole 602 and the first screw hole 601 are correspondingly provided. The first screw member 603 passes through the first through hole 602 and is inserted into the first screw hole 601. The screw connection form between the first screw hole 601 and the first screw member 603 is usually related to the connection strength requirements between the connector 202 and the first connecting part 301. In actual implementation, it can be set accordingly according to the connection strength requirements between the first connecting part 301 and the connector 202.

[0053] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, provide a threaded insert on the connector 202, with a first threaded hole 601 formed on the threaded insert.

[0054] It is understandable that by setting the threaded insert, it is easier to arrange the first threaded hole 601 on the connector 202, and it can reduce the processing difficulty, facilitate processing and manufacturing, and facilitate design implementation.

[0055] In practical implementation, the above threaded insert can also be called a threaded sleeve, wire thread insert or wire threaded sleeve. Its inner wall has a threaded structure and can be assembled in a hole to cooperate with the threaded connector. The connector 202 is provided with an installation hole, and the threaded insert is embedded in the installation hole and held in the installation hole.

[0056] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, allow the second connection 302 and the sidewall 102 to be connected by a plurality of second screw assemblies 7.

[0057] It is understood that by connecting the second connecting part 302 and the side wall 102 through a plurality of second screw-on assemblies 7, it is convenient to realize the assembly between the second connecting part 302 and the side wall 102, and the connection strength between the second connecting part 302 and the side wall 102 can be ensured.

[0058] In a specific implementation, the second threaded assembly 7 includes a second threaded hole and a second threaded member 701. The second threaded hole is formed on the second connecting part 302, and a through hole is formed on the side wall 102. The second threaded member 701 can pass through the through hole and be threaded into the second threaded hole. The second threaded hole can also be formed on the second connecting part 302 by using a threaded insert.

[0059] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, provide a second seal 8 between the second connection portion 302 and the side wall 102, the second seal 8 being a ring arranged circumferentially around the second connection portion 302.

[0060] It is understandable that the second sealing element 8 facilitates the sealing between the second connection part 302 and the side wall 102, has a simple structure, is easy to process and manufacture, and is helpful for design and implementation.

[0061] In a specific implementation, the above-mentioned second sealing part can be, for example, a sealing ring. The sealing ring is shaped to conform to the outer contour of the second connecting part 302 and can seal the space between the second connecting part 302 and the side wall 102. When the second connecting part 302 is connected to the side wall 102 through the second screw assembly 7, each of the second screw assemblies 7 is located in the area formed by the second sealing member 8.

[0062] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, include a module body 401 disposed on the outside of the sidewall 102, and a first connector 402 and a second connector 403 disposed at both ends of the module body 401. The first connector 402 is connected to the connecting pipe 303 through the second connecting part 302, and the second connector 403 is used to connect to an external refrigeration system.

[0063] It is understandable that by making the second water inlet module 4 include a module body 401, a first connector 402 and a second connector 403, it is convenient to connect the second water inlet module 4 with the first water inlet module 3 and the external refrigeration system. Furthermore, the arrangement of the module body 401 facilitates the arrangement of the first connector 402 and the second connector 403. The structure is simple, easy to process and manufacture, and conducive to design and implementation.

[0064] In specific implementation, the first connector 402 and the second connecting part 302 are sealed together, and the second connector 403 is sealed together with the external refrigeration system. The second connector 403 can be connected to the electronic expansion valve in the external refrigeration system, and the external refrigeration system can be the vehicle air conditioning system.

[0065] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, provide a second through hole on the side wall 102, and a second connection port 3021 on the second connection part 302 that communicates with the connecting pipe 303, and the first connector 402 passes through the second through hole and is inserted into the second connection port 3021.

[0066] It is understandable that the second through hole facilitates the arrangement of the first connector 402 and allows the first connector 402 to be inserted into the second connection port 3021, which facilitates the connection between the first connector 402 and the second connection port 3021. The structure is simple and easy to design and implement.

[0067] In specific implementation, preferably, the second through hole and the first connector 402 are sealed together, for example, by applying sealant. After the first connector 402 is inserted into the second connection port 3021, it can abut against or be spaced from the connecting pipe 303.

[0068] Continue to combine Figures 1 to 6 As shown, in some exemplary embodiments, this embodiment may, for example, provide a third seal 9 between the first connector 402 and the second connection 302.

[0069] It is understandable that by providing a third sealing element 9 between the first connector 402 and the second connecting part 302, it is convenient to achieve a sealing setting between the second connecting part 302 and the first connector 402, and the structure is simple, easy to process and manufacture, and thus helpful for design implementation.

[0070] In a specific implementation, the first connector 402 is inserted into the second connection port 3021 of the second connection part 302, and the third sealing member 9 is a ring surrounding the first connector 402. The third sealing member 9 can be, for example, a sealing ring. The first connector 402 is provided with a groove matching the sealing ring, and the second connection part 302 is provided with a groove to cooperate with it. When the first connector 402 is inserted into the second connection port 3021, the third sealing member 9 is located in the area enclosed by the groove of the first connector 402 and the groove on the second connection part 302.

[0071] It is worth noting that, regarding the battery pack of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 6 As shown, it may include, for example, a lower housing 1, a direct cooling plate 2, a first gate module 3, and a second gate module 4.

[0072] The lower housing 1 includes a bottom wall 101 and a side wall 102 disposed on the bottom wall 101. The direct cooling plate 2 is arranged on the bottom wall 101 and is connected to the external refrigeration system through the first water inlet module 3 and the second water inlet module 4.

[0073] The first sprue module 3 includes a first connecting part 301 connected to the direct cooling plate 2, a second connecting part 302 connected to the second sprue module 4, and a connecting pipe 303 connecting the first connecting part 301 and the second connecting part 302. The connecting pipe 303 is made of aluminum alloy. The second sprue module 4 includes a module body 401, and a first connector 402 and a second connector 403 located on both sides of the module body 401.

[0074] The first connecting part 301 is provided with a cold plate connector 3011 that communicates with the connecting pipe 303. The straight cold plate 2 is provided with a connector 202. The connector 202 has a first connection port 201 that communicates with the flow channel of the straight cold plate 2. The cold plate connector 3011 is inserted into the first connection port 201, and a first sealing member 5 is provided between the cold plate connector 3011 and the connector 202. The first connecting part 301 is connected to the connector 202 via the first screw assembly 6. The first screw assembly 6 includes a first screw hole 601 provided on the connector 202, a first through hole 602 provided on the first connecting part 301, and a first screw member 603 passing through the first through hole 602 and screwed into the first screw hole 601. The first screw hole 601 is formed on the connector 202 by a threaded insert.

[0075] The second connecting portion 302 is connected to the side wall 102 via a second screw assembly 7. The second screw assembly 7 includes a second screw hole 702 on the second connecting portion 302 and a second screw member 701 screwed into the second screw hole 702. The side wall 102 has a through hole for the second screw member 701 to pass through. A second sealing member 8 is provided between the second connecting portion 302 and the side wall 102, and the second sealing member 8 is arranged in a ring around the second connecting portion 302.

[0076] The second water inlet module 4 includes a module body 401 located on the outside of the side wall 102, and a first connector 402 and a second connector 403 located at both ends of the module body 401. The first connector 402 is connected to the connecting pipe through the second connecting part 302, and the second connector 403 is used to connect to the external refrigeration system, which is the vehicle air conditioning system.

[0077] The side wall 102 is provided with a second through hole, and the second connecting part 302 is provided with a second connecting port 3021 that communicates with the connecting pipe 303. The first connector 402 passes through the second through hole and is inserted into the second connecting port 3021. A third sealing element 9 is provided between the first connector 402 and the second connecting part 302. The third sealing element 9 is a ring arranged around the first connector 402.

[0078] In the preferred embodiment of the battery pack above, the specific configuration and arrangement of the lower housing 1, the first gate module 3, the second gate module 4, etc. can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the lower housing 1, the first gate module 3, and the second gate module 4, etc., can also be referred to the descriptions in the above exemplary embodiments.

[0079] The battery pack of this embodiment adopts the above design. Through the coordinated action of the first gate module 3 and the second gate module 4, it is easy to realize the gate arrangement on the lower shell 1. The first connecting part 301, the second connecting part 302, the direct cooling plate 2 and the side wall 102 of the lower shell 1 are all sealed. This can ensure the sealing requirements of the gate structure arranged on the lower shell 1. At the same time, by making the connecting pipe 303 into a metal material, the pressure requirements of the direct cooling plate 2 can be met. This not only meets the requirement of the direct cooling plate 2 being built into the battery pack, but also ensures the overall sealing of the pack, thereby improving the safety of the entire pack.

[0080] An embodiment of the second aspect of this application provides a power device in which the battery pack of the embodiment of the first aspect of this application is provided.

[0081] In this embodiment, the power unit can be, for example, a new energy vehicle. The battery pack is used as an energy storage component of the new energy vehicle, and the second inlet module 4 of the battery pack is connected to the refrigeration system in the vehicle. Specifically, the second connector 403 of the battery pack is connected to the electronic expansion valve of the vehicle's air conditioning system.

[0082] In this embodiment, the power unit, through the battery pack arrangement described above, can arrange the direct cooling plate 2 inside the battery pack and ensure the sealing of the water inlet structure and the battery pack housing, thereby improving the quality of use of the battery pack and thus improving the quality of use of the power unit.

[0083] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A battery pack, characterized in that: It includes a lower housing, a direct cooling plate and a first water inlet module disposed in the lower housing, and a second water inlet module located on the outer side wall of the lower housing; The first sprue module includes a first connecting part connected to the direct cooling plate, a second connecting part connected to the second sprue module through the side wall, and a connecting pipe connecting the first connecting part and the second connecting part, wherein the connecting pipe is made of metal. The first connecting part and the direct cooling plate, the second connecting part and the lower housing side wall, and the second connecting part and the second water inlet module are all sealed together.

2. The battery pack according to claim 1, characterized in that: The first connecting part is provided with a cold plate joint that communicates with the connecting pipe; The direct cooling plate is provided with a connector, the connector having a first connection port communicating with the flow channel of the direct cooling plate, and the cooling plate connector being inserted into the first connection port.

3. The battery pack according to claim 2, characterized in that: A first sealing element is provided between the cold plate joint and the connector.

4. The battery pack according to claim 2, characterized in that: The first connecting part and the connecting member are connected by a plurality of first screw assemblies.

5. The battery pack according to claim 4, characterized in that: Each of the first screw-in components includes a first screw hole on the connector, a first through hole on the first connecting portion, and a first screw member that passes through the first through hole and is screwed into the first screw hole.

6. The battery pack according to claim 5, characterized in that: The connector is provided with a threaded insert, and the first threaded hole is formed on the threaded insert.

7. The battery pack according to claim 1, characterized in that: The second connecting portion and the sidewall are connected by a plurality of second screw-on assemblies; and / or, A second sealing element is provided between the second connecting part and the side wall, and the second sealing element is a ring arranged circumferentially around the second connecting part.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The second water inlet module includes a module body located on the outer side of the side wall, and a first connector and a second connector located at both ends of the module body. The first connector is connected to the connecting pipe through the second connecting part, and the second connector is used to connect to an external refrigeration system.

9. The battery pack according to claim 8, characterized in that: A second through hole is provided on the side wall, and a second connection port communicating with the connecting pipe is provided on the second connecting part. The first connector passes through the second through hole and is inserted into the second connection port; and / or... A third seal is provided between the first connector and the second connecting part.

10. A power unit, characterized in that: The power unit includes a battery pack as described in any one of claims 1 to 9.

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