Hanging structure of battery pack and battery pack

Abstract

The utility model discloses a mounting structure of a battery pack and the battery pack. The battery pack comprises a battery pack tray, a battery pack and a battery pack upper cover, and the battery pack upper cover is detachably connected with the top of the battery pack through a mounting structure. The mounting structure comprises a battery cell bridging beam and a plurality of bolt assemblies. The battery cell bridging beam extends along a first direction of battery cell arrangement of the battery pack and is fixedly arranged at the top of the battery pack; and the cross section of the battery cell bridging beam is U-shaped. The bottom of the battery cell bridging beam is fixedly connected with the top of the battery pack, and the top end of the battery cell bridging beam is fixedly jointed with the battery pack upper cover. Each bolt assembly comprises a stud and a nut matched with the stud. One of the stud and the nut is at least partially arranged in the U-shaped space of the battery cell bridging beam and can move along the battery cell bridging beam, and the other one of the stud and the nut is arranged at the corresponding mounting hole position of the upper cover of the battery pack and is adaptively jointed with one of the stud and the nut. By adopting the scheme, the space utilization rate in the battery pack can be improved while the disassembly and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the field of battery packs, and in particular to a mounting structure of a battery pack and a battery pack. Background Art

[0002] Battery packs are widely used in various applications requiring large amounts of energy storage and release, such as electric vehicles, solar power plants, and other power systems. A battery pack typically consists of multiple connected cells, housed in a tray, and covered with a lid. The type and number of cells are determined based on the pack's capacity, voltage, discharge time, and application. To ensure the integrity of the battery pack, there are generally two ways to connect the cells, tray, and lid:

[0003] The first method is to inject potting compound to connect the battery cells, trays, upper covers and related structural parts;

[0004] The second method is to set up a large number of horizontal and vertical beam structures in the pallet to connect the battery cells, upper cover and related structural parts.

[0005] The first method involves high-cost and heavy potting compounds that are resistant to water, heat, cold, acid, alkali, and high and low temperature shocks. The process requirements for potting are also high, making potting more difficult. Furthermore, the large amount of adhesive makes disassembly of the battery pack more difficult, requiring significant labor and material resources for later repair or recycling.

[0006] For the second method, although the use of horizontal and vertical beams for connection has high manufacturability and is more friendly to disassembly and maintenance, the setting of the horizontal and vertical beam structure occupies space in the battery pack, increases the overall weight of the battery pack, and greatly reduces the energy density of the battery pack.

[0007] In summary, the connection structure of the battery pack in the prior art cannot simultaneously take into account the problems of facilitating disassembly and maintenance and saving space in the battery pack. Utility Model Content

[0008] The purpose of the present invention is to solve the problem in the prior art that the connection structure of the battery pack cannot take into account both the convenience of disassembly and maintenance and the space saving inside the battery pack. The present invention provides a battery pack mounting structure and a battery pack, which can improve the space utilization inside the battery pack while facilitating disassembly and maintenance. In order to solve the above technical problems, the embodiment of the present invention discloses a battery pack mounting structure, the battery pack includes a battery pack tray, a battery pack arranged on the battery pack tray, and a battery pack cover arranged on the battery pack; the battery pack includes a plurality of battery cells arranged side by side on the battery pack tray, and the battery pack cover is detachably connected to the top of the battery pack via a mounting structure. The mounting structure includes: a battery cell jumper beam and a plurality of bolt assemblies. The battery cell jumper beam extends along a first direction of battery cell arrangement and is fixedly arranged on the top of the battery pack; and the cross-section of the battery cell jumper beam is U-shaped; the bottom of the battery cell jumper beam is fixedly connected to the top of the battery pack, and the top of the battery cell jumper beam is fixedly engaged with the battery pack cover. Each bolt assembly includes a stud and a nut adapted for the stud, wherein one of the stud and the nut is at least partially disposed in the U-shaped space of the battery cell jumper beam and can move along the battery cell jumper beam, and the other is disposed at a corresponding mounting hole position on the battery pack cover and adapted to engage with one of the stud and the nut.

[0009] By adopting the above technical solution, the battery pack and the upper cover of the battery pack can be installed and fixed by using the mounting structure, without the need to inject a large amount of potting glue, so that the battery pack has a high repairability and maintainability. In addition, the battery pack and the upper cover of the battery pack can be fixed only by the cell jumper beam set in the direction of the arrangement of the battery cells, without the need to cross-set multiple horizontal and vertical beams, which increases the longitudinal available space in the battery pack and reduces the overall weight of the battery pack. By setting the cell jumper beam as a U-shaped groove structure and partially setting the bolt assembly in the U-shaped space of the cell jumper beam, the space occupied by the mounting structure in the battery pack can be further saved, and the energy density of the entire pack can be further improved. In addition, by utilizing the U-shaped space of the cell jumper beam to realize the installation of the bolt assembly, and then realizing the installation and fixation of the upper cover of the battery pack, the problem of assembly tolerance is greatly reduced, thereby improving the manufacturability of the entire battery pack and facilitating the assembly of the battery pack.

[0010] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a mounting structure of a battery pack, in which the stud is T-shaped as a whole; the large end of the stud can be slidably adapted in the U-shaped space of the battery cell jumper beam and the end face can be slidably engaged with the top inner wall of the battery cell jumper beam, and the small end extends out of the battery cell jumper beam toward the battery pack cover and extends into the corresponding mounting hole; the nut is arranged on the outside of the battery pack cover and is sleeved on the small end of the stud passing through the corresponding mounting hole.

[0011] By adopting the above technical solution, the stud is at least partially set in the U-shaped space of the battery cell jumper beam, and the nut is set on the outside of the battery pack cover. The stud is directly slid to the position of the mounting hole, and the stud and nut can be installed by rotating the stud, thereby realizing the installation of the battery pack and the battery pack cover, thereby improving the installation convenience.

[0012] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a mounting structure of a battery pack, in which the stud is T-shaped as a whole; the large end of the stud is fixedly arranged on the outside of the battery pack cover, and the small end extends toward the battery cell jumper beam to form a corresponding mounting hole and extends into the U-shaped space of the battery cell jumper beam; the nut can be slidably adapted in the U-shaped space of the battery cell jumper beam and the end face can be slidably engaged with the top inner wall of the battery cell jumper beam, and is sleeved on the small end of the stud passing through the corresponding mounting hole.

[0013] By adopting the above technical solution, by setting the large end of the stud on the outside of the battery pack cover and setting the nut in the U-shaped space of the battery cell jumper beam, during the assembly process, there can be a certain amount of movement margin between the stud and the mounting hole, which can further eliminate assembly tolerances and improve the convenience of installing the stud and nut.

[0014] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a mounting structure of a battery pack, and the mounting structure also includes a clip assembly, the clip assembly includes an upper cover clip and a bridge beam clip; the upper cover clip is arranged between the top wall of the battery cell bridge beam and the upper cover of the battery pack; the bridge beam clip is located inside the U-shaped space of the battery cell bridge beam, and is arranged between the top side inner wall of the battery cell bridge beam and the large end of the stud or the nut in the U-shaped space of the battery cell bridge beam; wherein the top wall of the bridge beam clip is partially fitted with the top side inner wall of the battery cell bridge beam, and the bottom wall is partially fixedly connected to the top wall of the large end of the stud or the top wall of the nut in the U-shaped space of the battery cell bridge beam.

[0015] By adopting the above technical solution and providing the clip assembly, the battery pack and the battery pack cover are not prone to longitudinal movement after assembly, thereby improving the installation and fixing effect of the battery pack cover.

[0016] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a mounting structure of a battery pack, wherein the nut includes a first fixing portion and a first mounting portion, and the radial dimension of the first fixing portion is larger than the radial dimension of the first mounting portion; and, when the nut is arranged on the top side of the battery pack cover, the first fixing portion abuts against the top wall of the battery pack cover and is arranged on the outer periphery of the mounting hole, and the first mounting portion is fixedly connected to the inner edge of the first fixing portion and extends in a direction away from the battery cell jumper beam; or, when the nut is arranged in the U-shaped space of the battery cell jumper beam, the top wall of the first fixing portion abuts against the bottom wall of the jumper beam clip, one end of the first mounting portion is fixedly connected to the inner edge of the first fixing portion, and the other end is open toward the opening of the battery cell jumper beam.

[0017] According to another specific embodiment of the present invention, a mounting structure of a battery pack disclosed in an embodiment of the present invention also includes a clip sealing assembly, which includes an upper cover seal and a clip seal; wherein the upper cover seal is arranged between the upper cover clip and the upper cover of the battery pack along the circumference of the upper cover clip; the clip seal is arranged between the upper cover clip and the bridge beam clip along the circumference of the upper cover clip and around the column body of the stud.

[0018] By adopting the above technical solution and setting the clip sealing assembly, the sealing effect of the mounting structure can be improved.

[0019] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a mounting structure of a battery pack, which further includes a nut sealing portion and a hole sealing portion; wherein, when the nut is arranged on the top side of the battery pack cover, the nut sealing portion is sealed at the top of the first mounting portion, and the hole sealing portion is arranged around the mounting hole between the battery pack cover and the first fixing portion; or, when the nut is arranged in the U-shaped space of the battery cell jumper beam, the nut sealing portion is sealed at one end of the first mounting portion and abuts against the bottom wall of the battery cell jumper beam, and the hole sealing portion is arranged around the mounting hole between the battery pack cover and the large end of the stud.

[0020] By adopting the above technical solution, the sealing effect of the mounting structure can be improved by providing the nut sealing portion and the hole sealing portion.

[0021] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a mounting structure for a battery pack, wherein the battery pack includes multiple battery groups, wherein the multiple battery groups are arranged on a battery pack tray along a first direction and a second direction perpendicular to the first direction; the thickness direction of each battery cell is parallel to the first direction, and the length direction is parallel to the second direction; the length direction of each battery group is parallel to the first direction, and the width direction is parallel to the second direction; the battery cell cross-beams at the tops of two adjacent battery groups in the second direction are connected to each other and formed integrally. In addition, multiple cross-beams are arranged at intervals along the second direction on the battery pack tray, and each cross-beam is fixedly connected to the battery pack tray at both ends and the top end is fixedly connected to the battery cell cross-beam.

[0022] By using this technical solution, the cell cross-beams at the tops of two adjacent battery packs are shared, which reduces the number of cross-beams required and further reduces the weight of the entire pack. Furthermore, the provision of cross-beams further improves the rigidity of the battery pack and the load-bearing effect of the cells.

[0023] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a mounting structure for a battery pack, wherein the battery pack is a vehicle-mounted battery pack, and the battery pack cover is integrated with the vehicle body floor; and the battery pack cover is fixedly connected to the vehicle body seat crossbeam and / or body structure crossbeam.

[0024] By adopting the above technical solution, the battery cells that make up the battery pack can directly participate in the load-bearing, and the force applied to the battery pack cover can be transmitted to the battery pack tray and the entire battery pack, further improving the structural rigidity of the battery pack cover, and also improving the space utilization of the entire vehicle and the integration of the battery pack.

[0025] An embodiment of the present utility model further discloses a battery pack, comprising the mounting structure of the battery pack as described in any of the above embodiments.

[0026] By adopting the above technical solution, the battery pack can have greater installation convenience and higher energy density of the whole pack on the basis of easy disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a battery pack provided by an embodiment of the present utility model;

[0028] Figure 2 Another structural schematic diagram of the battery pack provided by an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the installation of the mounting structure of the battery pack provided by an embodiment of the present utility model;

[0030] Figure 4This is a schematic structural diagram of a battery pack mounting structure provided by an embodiment of the present utility model;

[0031] Figure 5 This is a schematic diagram of the assembly of the mounting structure of the battery pack provided by an embodiment of the present utility model;

[0032] Figure 6 This is another installation diagram of the mounting structure of the battery pack provided by an embodiment of the present utility model;

[0033] Figure 7 This is another structural diagram of the mounting structure of the battery pack provided by an embodiment of the present utility model;

[0034] Figure 8 This is another assembly diagram of the mounting structure of the battery pack provided by an embodiment of the present utility model;

[0035] Figure 9 This is another assembly diagram of the mounting structure of the battery pack provided by an embodiment of the present utility model;

[0036] Figure 10 This is another structural schematic diagram of the battery pack provided by an embodiment of the present utility model.

[0037] Description of reference numerals:

[0038] 1. Battery pack; 11. Battery pack tray; 12. Battery pack; 13. Battery pack cover; 14. Battery cell; 15. Crossbeam;

[0039] 2. Mounting structure; 21. Cell jumper beam; 22. Stud; 23. Nut; 231. First fixing portion; 232. First mounting portion; 24. Upper cover clip; 25. Jumper beam clip; 26. Upper cover seal; 27. Clip seal; 28. Nut seal; 29. ​​Hole seal;

[0040] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0041] Example 1:

[0042] In recent years, with the continuous development of the new energy industry, battery packs have been used in various scenarios requiring functionality. Users have increasingly high expectations for battery packs, hoping that they can be easily disassembled and repaired, and that they can release more energy in a smaller size. This undoubtedly poses a great challenge to the production and manufacturing of battery packs. Currently, there are two main assembly methods for battery packs during the manufacturing process:

[0043] The first method involves attaching structural components (such as spacers) to the battery cells using adhesive (for example, spacers need to be attached to the top of the cell to create a venting channel). The outer surface of the cell is then bonded to the inner surface of the battery pack cover using adhesive. Specifically, when installing the battery pack cover, potting adhesive is applied to the end faces of the cell terminals and to the side frame beams of the battery pack.

[0044] For the first assembly method, if the battery pack needs to be repaired, maintained, or recycled, the battery pack cover must be removed first, followed by the structural components. Finally, the potting compound on the surface of the battery cells must be removed. During the removal of the cover and structural components, the strong adhesive force of the potting compound may damage or deform the structural components. Furthermore, removing the potting compound is difficult. Furthermore, the potting compound itself is heavy, making it difficult to reduce the weight of the battery pack.

[0045] The second method is to first connect multiple cross beams on the top of the battery cell with bolts, and then fix multiple longitudinal beams above the cross beams; then use bolts to install the battery pack cover on the top of the longitudinal beams.

[0046] For the second assembly method, in order to ensure the stability of the crossbeams and longitudinal beams, the ends of the crossbeams and longitudinal beams need to be fixed to the battery pack tray, that is, a part of the longitudinal space of the battery pack needs to be reserved for the installation of the crossbeams and longitudinal beams. Although this installation method can quickly disassemble the battery pack during subsequent repair and maintenance, the installation of the crossbeams and longitudinal beams greatly reduces the available space in the battery pack, and will also increase the overall weight of the battery pack and reduce the energy density of the entire pack. In addition, when using crossbeams and longitudinal beams to fix the battery cells and the battery pack cover, it is necessary to open installation holes on the crossbeams, longitudinal beams, battery pack cover, battery pack tray, and even the battery cells, and pass bolts through the installation components to achieve fixation. Since it is difficult to achieve very precise positioning of the battery cells relative to the battery pack tray, and the crossbeams and longitudinal beams need to be positioned and installed according to the battery cells, this will undoubtedly cause a large cumulative dimensional tolerance, which will ultimately lead to a greater risk in the assembly of the battery pack cover, and it is easy to have large hole deviations and cannot be installed normally.

[0047] In summary, the existing battery pack installation method has the problem of not being able to take into account both the convenience of disassembly and maintenance and the improvement of the space utilization rate of the entire pack.

[0048] In response to the above-mentioned problems, the present application provides a mounting structure for a battery pack. The mounting structure sets a jumper beam on the top of the battery pack, and uses a bolt assembly to connect the jumper beam to the battery pack cover and the battery pack. The battery pack and the battery pack cover can be fixed without injecting potting glue, which is convenient for disassembling the battery pack during subsequent repair and maintenance. Moreover, the battery pack and the battery pack cover can be fixed only by using the battery cell jumper beams set in the same direction, without the need to cross-set multiple horizontal and vertical beams, which increases the available space in the battery pack and reduces the overall weight of the battery pack. Furthermore, the battery cell jumper beam is set as a U-shaped groove structure, and the bolt assembly is partially set in the U-shaped space of the battery cell jumper beam, which can further save the space occupied by the mounting structure in the battery pack and further improve the energy density of the entire pack.

[0049] The battery pack mounting structure provided in this embodiment can be applied to any scenario where a battery cell needs to be connected to a battery pack cover, including but not limited to new energy vehicles, drones, power stations, etc. The battery pack mounting structure is described in detail below.

[0050] First, refer to Figure 1-2 The structure of the battery pack 1 will be described.

[0051] refer to Figure 1 The battery pack 1 includes a battery pack tray 11, a battery pack 12 disposed on the battery pack tray 11, and a battery pack cover 13 ( Figure 2 ). The battery pack 12 includes a plurality of battery cells 14 arranged side by side on the battery pack tray 11, and the battery pack cover 13 is detachably connected to the top of the battery pack 12 via a mounting structure.

[0052] Next, refer to Figure 2-5 The mounting structure 2 will be described.

[0053] refer to Figure 3 The mounting structure 2 includes a cell cross-beam 21 and a plurality of bolt assemblies. Each bolt assembly includes a stud 22 and a nut 23 adapted to the stud 22.

[0054] Specifically, refer to Figure 2 The cell cross-connecting beam 21 extends along the first direction X in which the cells 14 are arranged and is fixedly disposed on the top of the battery pack 12. Figure 4 The cross-section of the cell jumper beam 21 is U-shaped. The bottom of the cell jumper beam 21 is fixedly connected to the top of the battery pack 12, that is, the top of the battery cells 14 of the battery pack 12, and the top of the cell jumper beam 21 is fixedly engaged with the battery pack cover 13. It should be understood that fixed engagement means that when the cell jumper beam 21 is connected with the bolt assembly, the cell jumper beam 21 and the battery pack cover 13 are relatively fixed and will not move relative to each other.

[0055] One of the stud 22 and the nut 23 is at least partially disposed in the U-shaped space of the cell jumper beam 21 and can move along the cell jumper beam 21, and the other is disposed at the corresponding mounting hole position of the battery pack cover 13 and is adapted to engage with one of the stud 22 and the nut 23.

[0056] Specifically, in this application, it can be Figure 4 The stud 22 shown in FIG is partially disposed in the U-shaped space of the cell cross-beam 21 and can extend along the length direction of the cell cross-beam 21 (ie, Figure 2 At this time, the nut 23 is set at the corresponding mounting hole position of the battery pack cover 13 and is adapted to be combined with the stud 22. Alternatively, the nut 23, which is not shown in the figure, can be completely set in the U-shaped space of the battery cell cross-beam 21 and can be extended along the length direction of the battery cell cross-beam 21 (that is, Figure 2 The stud 22 is then positioned in a corresponding mounting hole on the battery pack cover 13, extending from the battery pack cover 13 toward the cell bridge beam 21 and engaging with the nut 23. It should be understood that the term "engaging" refers to the engagement of the external thread of the stud 22 with the internal thread of the nut 23.

[0057] With such a structure, the battery pack 12 and the battery pack cover 13 can be installed and fixed using the mounting structure 2 without the need to inject a large amount of potting glue, making the battery pack 1 highly repairable and maintainable. In addition, the battery pack 12 and the battery pack cover 13 can be fixed only by the cell jumper beam 21 arranged in the direction of the cell arrangement, without the need to cross-set multiple horizontal and vertical beams, thereby increasing the longitudinal available space in the battery pack 1 and reducing the overall weight of the battery pack 1. Configuring the cell jumper beam 21 as a U-shaped groove structure and partially arranging the bolt assembly in the U-shaped space of the cell jumper beam 21 can further save the space occupied by the mounting structure 2 in the battery pack 1 and further improve the energy density of the entire pack. In addition, the U-shaped space of the battery cell jumper beam 21 is utilized to install the bolt assembly, thereby achieving the installation and fixation of the battery pack cover 13. Since the bolt assembly can slide along the length extension direction of the battery cell jumper beam 21 in the battery cell jumper beam 21, the bolt assembly is easier to correspond to the position of the mounting hole on the battery pack cover 13, which greatly reduces the problem of assembly tolerance, thereby improving the manufacturability of the entire battery pack 1 and facilitating the assembly of the battery pack 1.

[0058] Continue to refer Figure 4The stud 22 is a T-shaped structure as a whole. The large end of the stud 22 can be slidably adapted in the U-shaped space of the battery cell jumper beam 21 and the end face can be slidably engaged with the top inner wall of the battery cell jumper beam 21. The small end of the stud 22 extends out of the battery cell jumper beam 21 toward the battery pack cover 13 and extends into the corresponding mounting hole. The nut 23 is arranged on the outside of the battery pack cover 13 and is sleeved on the small end of the stud 22 passing through the corresponding mounting hole. Specifically, the radial length of the large end of the stud 22 can be slightly larger than the diameter of the U-shaped mouth of the battery cell jumper beam 21 to prevent the large end of the stud 22 from falling out of the U-shaped space of the battery cell jumper beam 21. During assembly, the large end of the stud 22 is inserted into the U-shaped space of the battery cell jumper beam 21 from the U-shaped mouth of the battery cell jumper beam 21. Because the cell cross-beam 21 does not restrict the movement of the stud 22, the large end of the stud 22 can slide along the length of the cell cross-beam 21 (i.e., the first direction X), facilitating alignment with the mounting hole on the battery pack cover 13. Furthermore, to prevent unnecessary axial movement of the stud 22 within the U-shaped space of the cell cross-beam 21, the axial length of the large end of the stud 22 can be set to be approximately the same as the axial dimension of the U-shaped space within the cell cross-beam 21, so that the top end surface of the stud 22 is close to the top inner wall of the cell cross-beam 21. With this structure, the stud 22 is at least partially positioned within the U-shaped space of the cell cross-beam 21, and the nut 23 is positioned outside the battery pack cover 13. The stud 22 can be simply slid to the mounting hole, and the stud 22 and nut 23 can be installed by rotating the stud 22, thereby completing the installation of the battery pack 12 and the battery pack cover 13, thereby improving installation convenience.

[0059] Further reference Figure 4The mounting structure 2 also includes a clip assembly, which includes an upper cover clip 24 and a bridge beam clip 25. The upper cover clip 24 is arranged between the top wall of the battery cell bridge beam 21 and the battery pack upper cover 13 to achieve clamping between the battery pack upper cover 13 and the top wall of the battery cell bridge beam 21. The bridge beam clip 25 is located inside the U-shaped space of the battery cell bridge beam 21, and is arranged between the top side inner wall of the battery cell bridge beam 21 and the large end of the stud 22 in the U-shaped space of the battery cell bridge beam 21 to achieve clamping between the large end of the stud 22 and the battery cell bridge beam 21. Among them, the top wall of the bridge beam clip 25 is partially in contact with the top side inner wall of the battery cell bridge beam 21, and the bottom wall is partially fixedly connected to the top wall of the large end of the stud 22 in the U-shaped space of the battery cell bridge beam 21. Specifically, the top wall of the cross-beam clip 25 abuts against the top inner wall of the cell cross-beam 21. The cross-beam clip 25 and the top wall of the large end of the stud 22 can be fixed by applying structural adhesive to the bottom wall of the cross-beam clip 25 and gluing them together. Alternatively, the cross-beam clip 25 and the stud 22 can be fixed by welding or integrally forming them. With such a structure, the provision of the clip assembly makes it difficult for the battery pack 12 and the battery pack cover 13 to move longitudinally after assembly, thereby improving the installation and fixation effect of the battery pack cover 13.

[0060] Further reference Figure 4 The nut 23 includes a first fixing portion 231 and a first mounting portion 232. The radial dimension of the first fixing portion 231 is larger than the radial dimension of the first mounting portion 232. The first fixing portion 231 is used to fix the nut 23 to the battery pack cover 13, and the first mounting portion 232 is used to adapt and install with the stud 22. In addition, the first fixing portion 231 abuts against the top wall of the battery pack cover 13 and is arranged on the outer periphery of the mounting hole. The first mounting portion 232 is fixedly connected to the inner edge of the first fixing portion 231 and extends in a direction away from the battery cell jumper beam 21. Specifically, the first fixing portion 231 and the first mounting portion 232 are preferably integrally formed to improve the installation and fixing effect. The first fixing portion 231 and the battery pack cover 13 can be fixed by gluing or welding.

[0061] Further, refer to Figure 4The mounting structure 2 also includes a clip sealing assembly, which includes an upper cover seal 26 and a clip seal 27. The upper cover seal 26 is used to achieve sealing between the battery pack upper cover 13 and the upper cover clip 24, and the clip seal 27 is used to achieve sealing between the upper cover clip 24 and the battery cell cross-beam 21. Among them, the upper cover seal 26 is arranged between the upper cover clip 24 and the battery pack upper cover 13 along the circumference of the upper cover clip 24. The clip seal 27 is arranged between the upper cover clip 24 and the cross-beam clip 25 along the circumference of the upper cover clip 24 and around the column body of the stud 22. Specifically, the upper cover seal 26 and the clip seal 27 are both annular sheet structures, and the inner circumferential shape of the clip seal 27 is the same as the outer circumferential shape of the stud 22 to achieve a better sealing effect. In order to ensure that the upper cover seal 26 and the clip seal 27 will not move relative to the upper cover clip 24 or the battery pack upper cover 13, you can refer to Figure 4 In that way, it is embedded inside the upper cover clip 24. Of course, the upper cover seal 26 and the clip seal 27 can also be detachably clamped between the upper cover clip 24 and the battery pack upper cover 13, and between the upper cover clip 24 and the bridge beam clip 25, so as to facilitate disassembly and assembly.

[0062] Next, refer to Figure 5 The assembly process of the mounting structure 2 is described.

[0063] First, structural adhesive is applied to the surface of the battery cell 14 to achieve bonding and fixing of the battery cell 14 and the battery cell cross-beam 21 , and structural adhesive is applied to the top surface of the battery pack cover 13 to bond and fix the first fixing portion 231 of the nut 23 .

[0064] Afterwards, the large end of the stud 22 is inserted into the U-shaped space of the battery cell bridge beam 21 .

[0065] Next, the small end of the stud 22 is screwed to the first mounting portion 232 of the nut 23 to achieve the connection between the battery pack cover 13 and the battery group 12 .

[0066] The large end of the stud 22 can be integrally formed with a cross-beam clip 25. When the large end of the stud 22 is inserted into the U-shaped space of the cell cross-beam 21, the cross-beam clip 25 is also inserted into the U-shaped space of the cell cross-beam 21. In addition, after the large end of the stud 22 is inserted into the U-shaped space of the cell cross-beam 21, the upper cover clip 24 is also placed on top of the cell cross-beam 21.

[0067] If the upper cover clip 24 is embedded with the upper cover seal 26 and the clip seal 27, the upper cover seal 26 and the clip seal 27 will also be placed on top of the cell crossover beam 21 together with the upper cover clip 24 when the upper cover clip 24 is placed on top of the cell crossover beam 21. If the upper cover clip 24, upper cover seal 26, and clip seal 27 are provided separately, then before placing the upper cover clip 24, the clip seal 27 should be placed on top of the crossover beam clip 25. Then, the upper cover clip 24 should be placed on top of the clip seal 27, and finally, the upper cover seal 26 should be placed on top of the upper cover clip 24. Finally, the stud 22 and the nut 23 are screwed together.

[0068] Example 2:

[0069] Based on the mounting structure of the battery pack provided in the aforementioned embodiment, this embodiment provides a variation of the mounting structure.

[0070] The mounting structure provided in this embodiment differs from the mounting structure in embodiment 1 only in that the mounting structure in this embodiment does not include Figure 4 The upper cover seal 26 and the clip seal 27 are shown in FIG. However, in order to ensure the sealing performance, the embodiment is provided with Figure 7 Nut seal 28 and bore seal 29 are shown.

[0071] Next reference Figure 6-8 Provide explanation.

[0072] First reference Figure 6 In this embodiment, a sealing structure (ie Figure 7 The nut sealing portion 28 in the middle).

[0073] refer to Figure 7 The nut seal 28 is sealed against the top of the first mounting portion 232, and the hole seal 29 is disposed between the battery pack cover 13 and the first fixing portion 231, surrounding the mounting hole. Specifically, the nut seal 28 is preferably integrally formed with the first fixing portion 231 and the first mounting portion 232 to enhance sealing. The hole seal 29 seals the mounting hole, preventing moisture or dust from entering the battery cell 14 through the gap between the battery pack cover 13 and the nut 23, potentially affecting its normal operation.

[0074] It should be noted that all sealing components in this embodiment and the previous embodiments can be made of silicone, rubber or absorbent sponge. As for the sealing clip and the cell bridge beam 21, they are made of metal materials to ensure sufficient rigidity.

[0075] Next, refer to Figure 8 The assembly method of the mounting structure 2 provided in this embodiment is described.

[0076] First, structural adhesive is coated on the surface of the battery cell 14 to achieve bonding and fixing of the battery cell 14 and the battery cell bridge beam 21 .

[0077] Afterwards, the large end of the stud 22 is inserted into the U-shaped space of the battery cell bridge beam 21 .

[0078] Next, the small end of the stud 22 is screwed to the first mounting portion 232 of the nut 23 to achieve the connection between the battery pack cover 13 and the battery group 12. A nut sealing portion 28 is integrally formed on the top of the nut 23.

[0079] The large end of the stud 22 can be integrally formed with a cross-beam clip 25. When the large end of the stud 22 is inserted into the U-shaped space of the cell cross-beam 21, the cross-beam clip 25 is also inserted into the U-shaped space of the cell cross-beam 21. In addition, after the large end of the stud 22 is inserted into the U-shaped space of the cell cross-beam 21, the upper cover clip 24 is also placed on top of the cell cross-beam 21.

[0080] Before the small end of the stud 22 is screwed onto the first mounting portion 232 of the nut 23, a hole seal 29 is placed on top of the battery pack cover 13. The small end of the stud 22 passes through the cell bridge beam 21, the battery pack cover 13, and the hole seal 29 before being screwed onto the first mounting portion 232 of the nut 23. After assembly, the top surface of the stud 22 abuts the inner side of the nut seal 28.

[0081] Example 3:

[0082] Based on the mounting structure of the battery pack provided in the aforementioned embodiment, this embodiment provides a variation of the mounting structure.

[0083] The difference between the mounting structure provided in this embodiment and the mounting structures provided in embodiments 1 and 2 is that the studs and nuts of the mounting structure of this embodiment are arranged in different positions from those of embodiments 1 and 2. Specifically, in this embodiment, the studs are in a T-shaped structure as a whole; and, referring to Figure 9 The large end of the stud 22 is fixedly arranged on the outside of the battery pack cover 13 (i.e. Figure 4 The nut 23 is located in the middle of the battery cell, and the small end extends out of the corresponding mounting hole toward the battery cell cross-beam 21 and extends into the U-shaped space of the battery cell cross-beam 21. The nut 23 can be slidably adapted to the U-shaped space of the battery cell cross-beam 21 (i.e. Figure 4 The end face of the middle stud 22 is slidably engaged with the inner wall of the top side of the battery cell bridge beam 21 and is sleeved on the small end of the stud 22 passing through the corresponding mounting hole.

[0084] In this embodiment, the large end of the stud 22 is arranged on the outside of the battery pack cover 13, and the nut 23 is arranged in the U-shaped space of the battery cell jumper beam 21. During the assembly process, since there can be a certain amount of movement margin between the stud 22 and the mounting hole, the assembly tolerance can be further eliminated and the convenience of installing the stud 22 and the nut 23 can be improved.

[0085] Further, refer to Figure 9 When the nut 23 is set in the U-shaped space of the battery cell jumper beam 21, the position of the upper cover clip 24 remains unchanged and is set between the top wall of the battery cell jumper beam 21 and the battery pack upper cover 14 to achieve clamping between the battery pack upper cover 13 and the top wall of the battery cell jumper beam 21. The jumper beam clip 25 is still located inside the U-shaped space of the battery cell jumper beam 21. At this time, the jumper beam clip 25 is set between the top side inner wall of the battery cell jumper beam 21 and the nut 23 in the U-shaped space of the battery cell jumper beam 21 to achieve clamping between the nut 23 and the battery cell jumper beam 21. Among them, the top wall of the jumper beam clip 25 is partially in contact with the top side inner wall of the battery cell jumper beam 21, and the bottom wall is partially fixedly connected to the top wall of the nut 23 in the U-shaped space of the battery cell jumper beam 21.

[0086] The top wall of the first fixing portion 231 abuts against the bottom wall of the bridging beam clip 25 . One end of the first mounting portion 232 is fixedly connected to the inner edge of the first fixing portion 231 , and the other end is open to the opening of the cell bridging beam 21 .

[0087] In addition, the sealing component in this embodiment also has the following two configurations:

[0088] The first one is the same as in Example 1, refer to Figure 9 The upper cover seal 26 is arranged between the upper cover clip 24 and the battery pack upper cover 13 along the circumference of the upper cover clip 24; the clip seal 27 is arranged between the upper cover clip 24 and the bridge beam clip 25 along the circumference of the upper cover clip 24 and around the column body of the stud 22.

[0089] The second method is the same as the second embodiment, which uses the nut sealing part and the hole sealing part for sealing. Figure 9 The upper cover seal 26 and the clip seal 27. Among them, the nut sealing part is sealed and arranged at one end of the first mounting part and abuts against the bottom wall of the battery cell cross-beam, and the hole sealing part is arranged around the mounting hole between the battery pack upper cover and the large end of the stud.

[0090] It should be noted that the connection method between the various components in this embodiment is essentially the same as that in Embodiments 1 and 2 and will not be further described here. During assembly, there is no need to bond the stud 22 to the battery pack cover 13. Instead, after assembling the sealing component, the stud 22 is threaded through the mounting hole and the nut 23 is slid into place to achieve the threaded connection.

[0091] Example 4:

[0092] In a modification of the above embodiment, reference is made to Figure 10 The battery pack 1 includes a plurality of battery groups 12. Each battery group 12 contains a row of battery cells 14 arranged side by side. The plurality of battery groups 12 are arranged on the battery pack tray 11 along a first direction X and a second direction Y perpendicular to the first direction X.

[0093] The thickness direction of each battery cell 14 is parallel to the first direction X, and the length direction is parallel to the second direction Y. The length direction of each battery pack 12 is parallel to the first direction X, and the width direction is parallel to the second direction Y. The battery cell cross-beams 21 at the tops of two adjacent battery packs 12 in the second direction Y are connected to each other and formed integrally (refer to Figure 4 and Figure 7 With such a structure, by sharing the cell cross-beams 21 at the tops of two adjacent battery packs 12, the number of cell cross-beams 21 can be reduced, further reducing the weight of the entire pack.

[0094] In addition, a plurality of cross beams 15 are arranged at intervals along the second direction Y on the battery pack tray 11. Both ends of each cross beam 15 in the second direction Y are fixedly connected to the battery pack tray 11, and the top end is fixedly connected to the cell jumper beam 21. The specific fixed connection method can be to apply structural adhesive to both ends and the top end of the cross beam 15 for gluing, or to provide a card slot on the inner side wall of the battery pack tray 11 and apply structural adhesive to the top end of the cross beam 15 for connection and fixation, or to only provide a card slot on the inner side wall of the battery pack tray 11 and make the top end of the cross beam 15 abut against the cell jumper beam 21. In this embodiment, the provision of the cross beam 15 can further improve the rigidity of the battery pack 1 and the load-bearing effect of the battery cell 14.

[0095] Example 5:

[0096] Based on the mounting structure of the battery pack provided in the aforementioned embodiment, this embodiment provides an embodiment of a specific application scenario of the mounting structure, that is, the mounting structure is applied to new energy vehicles.

[0097] In this embodiment, the battery pack is an on-board battery pack, and the battery pack cover is integrated with the vehicle's body floor. Specifically, the battery pack cover is integrated with the vehicle's body floor, directly serving as the body floor. This allows the battery pack cover to directly support the load, effectively reducing the Z-direction space occupied by the battery pack. Furthermore, in this embodiment, the battery pack cover is connected to the battery pack via a mounting structure, allowing the cells that comprise the battery pack to directly participate in the load. Forces acting on the battery pack cover are transmitted to the battery pack tray and the entire battery pack, further enhancing the structural rigidity of the battery pack cover, improving the vehicle's space utilization, and improving the battery pack's integration.

[0098] Furthermore, the battery pack cover is fixedly connected to the vehicle's body seat crossbeam and / or body structure crossbeam. Specifically, the battery pack cover can be fixedly connected to the body seat crossbeam, or fixedly connected to the body structure crossbeam, or fixed to both the body seat crossbeam and the body structure crossbeam. The fixation described in this embodiment refers to integrated fixation, that is, the battery pack cover is integrated or partially integrated with the body seat crossbeam and the body structure crossbeam to further improve the space utilization of the entire vehicle and the integration efficiency of the cell-to-body (CTB).

[0099] Example 6:

[0100] Based on the mounting structure of the battery pack provided in the aforementioned embodiments, this embodiment provides a battery pack, comprising the mounting structure of the battery pack described in any of the above embodiments.

[0101] The battery pack provided in this embodiment has the above-mentioned battery pack mounting structure, so it can have greater installation convenience and higher energy density of the whole pack on the basis of easy disassembly and maintenance.

[0102] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A mounting structure for a battery pack, characterized in that: The battery pack includes a battery pack tray, a battery pack disposed on the battery pack tray, and a battery pack cover disposed on the battery pack; the battery pack includes a plurality of battery cells arranged side by side on the battery pack tray, and the battery pack cover is detachably connected to the top of the battery pack via a mounting structure; in The mounting structure includes: A cell jumper beam, the cell jumper beam extending along a first direction of the cell arrangement and fixedly disposed on the top of the battery pack; and the cell jumper beam having a U-shaped cross-section; the bottom of the cell jumper beam being fixedly connected to the top of the battery pack, and the top of the cell jumper beam being fixedly engaged with the battery pack cover; and Multiple bolt assemblies, each of the bolt assemblies includes a stud and a nut adapted for the stud, wherein one of the stud and the nut is at least partially disposed in the U-shaped space of the cell jumper beam and can move along the cell jumper beam, and the other is disposed at a corresponding mounting hole position of the battery pack cover and adapted to engage with one of the stud and the nut.

2. The mounting structure of the battery pack according to claim 1, wherein: The stud has a T-shaped structure as a whole; the large end of the stud can be slidably adapted in the U-shaped space of the battery cell jumper beam and the end face can be slidably engaged with the top inner wall of the battery cell jumper beam, and the small end extends out of the battery cell jumper beam toward the battery pack cover and extends into the corresponding mounting hole; the nut is arranged on the outside of the battery pack cover and is sleeved on the small end of the stud passing through the corresponding mounting hole.

3. The mounting structure of the battery pack according to claim 1, wherein: The stud has a T-shaped structure as a whole; the large end of the stud is fixedly arranged on the outer side of the battery pack cover, and the small end extends out of the corresponding mounting hole toward the battery cell jumper beam and extends into the U-shaped space of the battery cell jumper beam; the nut can be slidably adapted in the U-shaped space of the battery cell jumper beam and the end face can be slidably engaged with the top inner wall of the battery cell jumper beam, and is sleeved on the small end of the stud passing through the corresponding mounting hole.

4. The mounting structure of the battery pack according to claim 2 or 3, characterized in that: The mounting structure further includes a clip assembly, and the clip assembly includes an upper cover clip and a bridge beam clip; The upper cover clip is arranged between the top wall of the battery cell bridge beam and the battery pack upper cover; The bridge beam clip is located inside the U-shaped space of the battery cell bridge beam and is arranged between the top inner wall of the battery cell bridge beam and the large end of the stud or the nut in the U-shaped space of the battery cell bridge beam; wherein The top wall of the jumper beam clip is partially fitted with the top inner wall of the cell jumper beam, and the bottom wall is partially fixedly connected to the top wall of the large end of the stud or the top wall of the nut in the U-shaped space of the cell jumper beam.

5. The mounting structure of the battery pack according to claim 4, characterized in that: The nut comprises a first fixing portion and a first mounting portion, wherein the radial dimension of the first fixing portion is greater than the radial dimension of the first mounting portion; and When the nut is arranged on the top side of the battery pack cover, the first fixing portion abuts against the top wall of the battery pack cover and is arranged on the outer periphery of the mounting hole, and the first mounting portion is fixedly connected to the inner edge of the first fixing portion and extends in a direction away from the battery cell cross-beam; or When the nut is arranged in the U-shaped space of the battery cell jumper beam, the top wall of the first fixing part abuts against the bottom wall of the jumper beam clip, one end of the first mounting part is fixedly connected to the inner edge of the first fixing part, and the other end is open toward the opening of the battery cell jumper beam.

6. The mounting structure of the battery pack according to claim 5, characterized in that: Also included is a clip seal assembly, the clip seal assembly including an upper cover seal and a clip seal; in The upper cover seal is arranged between the upper cover clip and the battery pack upper cover along the circumference of the upper cover clip; The clip seal is arranged between the upper cover clip and the bridging beam clip along the circumference of the upper cover clip and around the column body of the stud.

7. The mounting structure of the battery pack according to claim 5, characterized in that: Also includes a nut sealing portion and a hole sealing portion; in When the nut is arranged on the top side of the battery pack cover, the nut sealing portion is sealed on the top of the first mounting portion, and the hole sealing portion is arranged around the mounting hole between the battery pack cover and the first fixing portion; or When the nut is arranged in the U-shaped space of the battery cell jumper beam, the nut sealing portion is sealed at one end of the first mounting portion and abuts against the bottom wall of the battery cell jumper beam, and the hole sealing portion is arranged around the mounting hole between the battery pack cover and the large end of the stud.

8. The mounting structure of a battery pack according to any one of claims 1 to 3, characterized in that: The battery pack includes a plurality of battery groups, wherein the plurality of battery groups are arranged on the battery pack tray along the first direction and a second direction perpendicular to the first direction; The thickness direction of each battery cell is parallel to the first direction, and the length direction of each battery cell is parallel to the second direction; The length direction of each battery pack is parallel to the first direction, and the width direction is parallel to the second direction; The cell cross-connecting beams at the tops of two adjacent battery packs in the second direction are connected to each other and formed as one piece; and A plurality of cross beams are arranged at intervals along the second direction on the battery pack tray, both ends of each cross beam are fixedly connected to the battery pack tray, and the top end is fixedly connected to the battery cell jumper beam.

9. The mounting structure of a battery pack according to any one of claims 1 to 3, characterized in that: The battery pack is a vehicle-mounted battery pack, and the battery pack cover is integrated with the vehicle body floor; and The battery pack upper cover is fixedly connected to the vehicle body seat crossbeam and / or the vehicle body structure crossbeam.

10. A battery pack, characterized in that: A mounting structure comprising a battery pack as described in any one of claims 1 to 9.

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