Frame type battery pack assembly

Abstract

The invention relates to the field of battery packs, in particular to a frame type battery pack assembly which comprises a shell structure. A battery cell structure is arranged in the shell mechanism; the shell structure comprises a bottom protection plate; a shell mechanism and an inner frame mechanism are arranged on the bottom protection plate; the shell mechanism comprises four external boundary beams; the inner frame mechanism comprises two in-box longitudinal beams which are distributed in parallel at an interval; an area between the two in-box longitudinal beams is used for arranging a battery cell structure; through cooperative use of the outer shell mechanism and the inner frame mechanism, the overall structural strength of the battery pack shell can be well guaranteed, meanwhile, through arrangement of the inner frame mechanism, battery cell areas of different sizes can be divided according to needs, and then the width of the battery cell structure can be effectively controlled; the electric quantity and the energy density of the battery cell structure arranged in the battery pack can be further controlled; and the application range of the device is widened.

Description

Technical Field

[0001] The present invention relates to the field of battery packs, and in particular to a frame-type battery pack assembly. Background Art

[0002] Against the backdrop of the shortage of fossil energy and increasingly serious environmental pollution, the demand for new energy vehicles is gradually increasing, especially electric vehicles.

[0003] As the core component of new energy electric vehicles, the battery system plays a very important role in safety and endurance performance. In traditional new energy electric vehicles, when the battery system is integrating battery cells, the battery cells are mostly integrated into battery modules through structural parts, and then the modules are integrated into the entire box as subsystems.

[0004] This integration method requires a large number of parts of different types, which will result in a low integration level of the battery system and a very low volume energy density of the battery pack.

[0005] As market demand continues to drive, the energy density of battery packs is becoming increasingly demanding. The integration model from battery cells to modules to battery packs can no longer meet current power requirements. CTP battery pack technology removes the module level from the battery pack. This technical solution can reduce the weight and number of parts of the entire pack to a certain extent, thereby increasing the energy density of the entire pack.

[0006] However, for a car model, each model generally has low-end, mid-end and high-end configurations, and the range of the low-end and mid-end configurations cannot be the same; if different battery pack structures are developed based on different ranges, it will not only increase the research and development costs of the vehicle, but also increase the production costs of the battery pack.

[0007] In addition, most existing battery packs use aluminum profile boxes or rolled steel boxes.

[0008] When the plug-in parts and connectors are connected to the battery pack shell, blind hole nuts need to be riveted inside the profile or rolled steel parts for connection, while ensuring the sealing of the battery pack.

[0009] However, during routine production and use, the riveting strength and sealing of rivet nuts are difficult to guarantee.

[0010] In addition, the shell structure of the battery pack needs to be transported or electrophoresed after welding, and the rivet nuts are prone to failure or fall off and leak during the transportation process.

[0011] However, after the battery including the shell is welded, due to its large size, larger equipment is needed for rework, which has high requirements on the tooling size and is not easy to rework.

[0012] Therefore, caulking is mostly used for sealing, which will increase the working hours and material costs and cause waste of resources. Moreover, caulking requires waiting for the glue to cure before the next operation can be carried out, seriously affecting the rework efficiency of the product. And if the reworked glue is unevenly applied or affected by gravity, there will also be problems with poor sealing.

[0013] The existing patent 201811549467.6 - A battery pack structure and an automotive chassis structure with a battery pack structure that can be quickly replaced does not clearly disclose the technical content for solving the above technical problems.

[0014] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing structure. Summary of the Invention

[0015] The object of the present invention is to provide a battery pack structure with a large overall structural strength and capable of assembling and changing the cell structure arrangement area.

[0016] In order to achieve the above object, the technical solution adopted by the present invention is:

[0017] A frame - type battery pack assembly, including a housing structure; a cell structure is arranged inside the housing mechanism.

[0018] The housing structure includes a bottom guard plate; an outer shell mechanism and an inner frame mechanism are arranged on the bottom guard plate.

[0019] The outer shell mechanism includes four outer side beams; the four outer side beams are sequentially connected to form a frame structure with a rectangular - shaped horizontal projection.

[0020] The inner frame mechanism includes two box - internal longitudinal beams arranged in parallel at intervals; the area between the two box - internal longitudinal beams is used for arranging the cell structure.

[0021] The cell structure includes multiple cell mechanisms, each cell mechanism includes multiple single cells, and the multiple single cells in each cell mechanism are sequentially arranged from one box - internal longitudinal beam to the other box - internal longitudinal beam.

[0022] The inner frame mechanism further includes a cell support mechanism; the cell support mechanism includes a support bending part; both ends of the support bending part are respectively connected to the two box - internal longitudinal beams.

[0023] Each support bending part includes a support protrusion; at least one side of the support protrusion is provided with an extension plate; one end of the extension plate in each support bending part is connected to the corresponding support protrusion, and the other end extends away from the support protrusion; a structural adhesive layer is provided on the extension plate.

[0024] The battery cell support mechanism includes a plurality of support bending parts; the adjacent support bending parts are spaced apart from each other; an extension plate is respectively provided on both sides of a support protrusion in at least one support bending part in the battery cell support mechanism; a reinforcing bending part is also provided on the support bending part with two extension plates; the reinforcing bending part includes a reinforcing protrusion, and a supporting flange is respectively provided on two opposite sides of the reinforcing protrusion; the reinforcing protrusion is arranged relative to the support protrusion; the supporting flange of the reinforcing bending part is bonded to the corresponding extension plate; a bonding flange is provided at one end of each extension plate away from the support protrusion; each support bending part is bonded to the bottom guard plate through the bonding flange.

[0025] An insulating strip is provided at one end of the extension plate away from the supporting protrusion; the insulating strip is provided in a protruding shape on the extension plate; and a glue storage groove is formed between the insulating strip and the supporting protrusion.

[0026] The shell mechanism also includes a middle crossbeam, the two ends of which are respectively connected to two oppositely arranged external side beams; the middle crossbeam is arranged perpendicular to the longitudinal beams in the box; the longitudinal beams in the box are provided with a clamping groove; the longitudinal beams in the box are clamped on the middle crossbeam through the clamping groove.

[0027] A copper bar wiring structure is provided in the housing structure, and the copper bar wiring structure includes a plurality of copper bar buckles; each of the copper bar buckles includes a copper bar support and a buckle body arranged on the copper bar support;

[0028] The copper busbar support includes a bottom support; a clamping component on the bottom support; the clamping component includes two clamping plates relatively arranged on the bottom support; the two clamping plates are spaced apart to form a copper busbar assembly groove; each clamping plate is provided with a clamping protrusion at one end away from the bottom support; an elastic plate is provided at one end close to the bottom support; the elastic plate and the clamping protrusion are distributed at both ends of the clamping plate; the elastic plate is arranged at an angle.

[0029] The bottom support is also provided with a partition plate; the partition plate is also provided with a clamping protrusion at one end away from the bottom support; the partition plate is arranged in the copper bar assembly groove; the partition plate divides the copper bar assembly groove into two single assembly grooves; each of the clamping protrusions is provided with a guiding inclined surface.

[0030] The longitudinal beams in the box and the external side beams adjacent to and parallel to each other are spaced apart; a wiring groove is formed between the longitudinal beams in the box and the external side beams adjacent to and parallel to each other; the wiring groove is located on the side of the battery cell structure.

[0031] The frame-type battery pack assembly also includes a wiring harness assembly and a BMS assembly; the wiring harness assembly includes a host wiring harness assembly, and the host wiring harness assembly is routed in a wiring trough; the BMS assembly includes a host and a slave; the host is distributed at the end of the shell structure; and the slave is distributed in the wiring trough.

[0032] The shell structure also includes an internal support mechanism; the internal support mechanism includes a support beam; one end of the support beam is connected to the external side beam; and the other end is connected to the longitudinal beam inside the box.

[0033] The advantages of the present invention are:

[0034] The invention discloses a frame-type battery pack assembly.

[0035] The present invention, through the coordinated use of the outer shell mechanism and the inner frame mechanism, can not only well ensure the overall structural strength of the battery pack shell, but also the setting of the inner frame mechanism can divide the battery cell areas of different sizes as needed, thereby effectively controlling the width of the battery cell structure, and further controlling the power and energy density of the battery cell structure arranged in the battery pack, thereby improving the scope of application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0037] Figure 1 It is a structural schematic diagram of the present invention.

[0038] Figure 2 The schematic diagram of the structure of the present invention is shown in FIG. 1 with the box cover removed.

[0039] Figure 3 It is a structural schematic diagram of a shell structure loaded with a battery core structure of the present invention.

[0040] Figure 4 It is a schematic structural diagram of the external side beam with a connector from the first perspective in the present invention.

[0041] Figure 5 It is a structural schematic diagram of the external side beam with a connector from a second viewing angle in the present invention.

[0042] Figure 6 It is a schematic structural diagram of the external side beam in the present invention.

[0043] Figure 7 It is a structural schematic diagram of the connecting plate assembly in the present invention from a first viewing angle.

[0044] Figure 8 It is a structural schematic diagram of the connecting plate assembly in the present invention from a second viewing angle.

[0045] Fig. 9 It is a structural schematic diagram of the connecting plate body in the present invention.

[0046] Fig.10 It is a schematic diagram of the structure of the rivet nut in the present invention.

[0047] Fig.11It is a structural schematic diagram of the shell structure in the present invention.

[0048] Fig.12 It is a structural schematic diagram of the present invention when a copper bar buckle and a main unit are provided on the shell structure.

[0049] Fig.13 It is a structural schematic diagram of the first viewing angle of the supporting bending member in the present invention.

[0050] Fig.14 It is a structural schematic diagram of the second viewing angle of the supporting bending member in the present invention.

[0051] Fig.15 It is a schematic structural diagram of the copper bar buckle in the present invention from the first viewing angle.

[0052] Fig.16 It is a structural schematic diagram of the copper bar buckle in the present invention from a second viewing angle.

[0053] Fig.17 It is a structural schematic diagram of the battery cell mechanism in the present invention.

[0054] The marks in the above figure are:

[0055] 1. Shell structure, 2. Shell mechanism, 3. Inner frame mechanism, 4. Middle crossbeam, 5. Bracket crossbeam, 6. Cell structure, 7. Wire trough, 8. Main unit, 9. Copper busbar buckle, 10. Cell support mechanism. DETAILED DESCRIPTION

[0056] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0057] A frame-type battery pack assembly comprises a shell structure 1; a battery cell structure 6 is arranged in the shell structure; the shell structure 1 comprises a bottom guard plate 1-1; an outer shell structure 2 and an inner frame structure 3 are arranged on the bottom guard plate 1-1; the inner frame structure 3 is used to store the battery cell structure 6; the present invention can not only well ensure the overall structural strength of the battery pack shell through the coordinated use of the outer shell structure 2 and the inner frame structure 3, but also the setting of the inner frame mechanism 3 can divide the battery cell areas of different sizes as needed, thereby effectively controlling the width of the battery cell structure 6, and further controlling the power and energy density of the battery cell structure 6 arranged in the battery pack, thereby improving the scope of application of the present invention.

[0058] The frame-type battery pack assembly disclosed in the present invention changes the traditional side-plate box-type battery pack structure. The overall height of the present invention is relatively low, and the ground clearance is larger when arranged on the whole vehicle, thereby reducing the impact on the vehicle's passability due to the arrangement of the battery pack.

[0059] In addition, in the present invention, the outer shell mechanism 2 includes four external side beams 21; the four external side beams 21 are connected in sequence to form a frame structure with a horizontal projection in the shape of a Chinese character “U”; the inner frame mechanism 3 includes two box inner longitudinal beams 31 that are spaced and distributed in parallel; the area between the two box inner longitudinal beams 31 is used to arrange the battery cell structure 6; the external side beams 21 and the box inner longitudinal beams 31 disclosed in the present invention are both rolled profiles, and their own structural strength is relatively large, which is beneficial to ensure the overall structural strength of the shell mechanism. At the same time, in the present invention, the sizes of the four external side beams 21 are designed according to needs, and generally, the sizes of two relatively parallel external side beams 21 are consistent; during actual assembly, the outer shell mechanism 2 can be designed as a cuboid structure or a cube structure.

[0060] In addition, in the present invention, the longitudinal beam 31 in the box can be connected to the outer shell mechanism 2 by welding, or by a detachable connection.

[0061] In the present invention, the battery cell structure 6 includes a plurality of battery cell mechanisms 61, each of the battery cell mechanisms 61 includes a plurality of single battery cells 611, and the plurality of single battery cells 611 in each battery cell mechanism 61 are sequentially arranged longitudinally from one box to another box longitudinal beam 31; the battery cell mechanism 61 disclosed in the present invention is the traditional CTP technology; the present invention is based on such a design, mainly in that the power and energy density of the battery pack can be controlled as needed during actual use.

[0062] The battery cell structure 6 disclosed in the present invention can be used in conjunction with the inner longitudinal beam 31 disclosed in the present invention. The spacing area set by the two inner longitudinal beams 31 of the present invention can control the number of single battery cells 611 in a single battery cell structure 61; thus, the required power and energy density can be accurately controlled during actual use.

[0063] Under the premise that the width of the technical battery pack in the present invention is certain, the present invention can change the power and energy density of the battery pack by changing the intervals between the longitudinal beams 31 in the box; thus, it can be adapted to different vehicle models; because each vehicle model has low-end, medium-end and high-end configurations, and the low-end and high-end configurations have different cruising ranges, if different battery pack structures are developed based on different cruising ranges, it will not only increase the R&D cost of the entire vehicle, but also increase the production cost of the battery pack.

[0064] The present invention can make the battery pack disclosed in the present invention applicable to vehicle models with different configurations without obvious changes in the external structure of the battery pack, thereby improving the scope of application of the present invention.

[0065] Furthermore, the inner frame mechanism 3 in the present invention also includes a battery cell support mechanism 10; the setting of the battery cell support mechanism 10 can well ensure the stability of the battery cell structure 6 in the battery pack, and at the same time, avoid the battery cell being placed directly on the bottom guard plate 1-1, which is not easy to install and fix.

[0066] The battery cell support mechanism 10 described in the present invention includes a support bending member 101; the support bending member 101 is mainly a supporting plate structure, which is used to provide longitudinal support for the battery cell structure 6; in addition, the two ends of the support bending member 101 described in the present invention are respectively connected to the two longitudinal beams 31 in the box; the support bending member 101 can be connected to the longitudinal beams 31 in the box by welding, or it can be fixed to the longitudinal beams 31 in the box by clamping or the like, and the specific selection can be made according to the actual working conditions.

[0067] In the present invention, each of the supporting bending parts 101 includes a supporting protrusion 1011; the supporting protrusion 1011 is generally an inverted U-shaped structure; the structural strength of the supporting protrusion 1011 is well guaranteed, and at the same time, the supporting protrusion 1011 plays a good lateral blocking role, which well guarantees the lateral blocking limit of the corresponding battery cell mechanism 61.

[0068] In addition, in the present invention, an extension plate 1012 is provided on at least one side of the support protrusion 1011; one end of the extension plate 1012 in each support bending member 101 is connected to the corresponding support protrusion 1011, and the other end extends to a side away from the support protrusion 1011; the setting of the extension plate 1012 plays a good supporting role and facilitates the support and limitation of the battery cell mechanism 61; in addition, the setting of the extension plate 1012 also facilitates the coating arrangement of the structural adhesive during subsequent use.

[0069] At the same time, in the present invention, the supporting protrusion 1011 and the extension plate 1012 have a height difference, which is convenient for lateral blocking and limiting of the structural adhesive during subsequent use to avoid overflow of the structural adhesive.

[0070] At the same time, a structural adhesive layer is provided on the extension plate in the present invention; the structural adhesive layer can limit the position of each single battery cell 611 in the battery cell mechanism 61, so as to achieve the adhesive fixation between the supporting bending part 101 and each single battery cell 611; at the same time, in addition to the connecting function, the structural adhesive layer in the present invention can also play a good heat dissipation role.

[0071] Furthermore, in the present invention, the battery cell support mechanism 10 includes multiple support bending parts 101; the coordinated use of multiple support bending parts 101 can realize the overall support of the battery cell structure 6; in the present invention, the adjacent support bending parts 101 are distributed at intervals; based on the content disclosed in the present invention, it can be known that the present invention requires two support bending parts 101 to realize the support of a battery cell mechanism 61, and the present invention requires that the adjacent support bending parts 101 are distributed at intervals; this forms a gap between the adjacent support bending parts 101, and the gap can optimize the heat dissipation effect and reduce the risk of thermal failure of the battery cell mechanism 61.

[0072] At the same time, in the battery cell support mechanism 10 described in the present invention, an extension plate 1012 is respectively provided on both sides of the support protrusion 1011 in at least one support bending member 101; the support protrusion 1011 in the support bending member 101 of the present invention can be provided with an extension plate 1012 on one side, or on both sides, which is determined based on its arrangement position. In actual use, if one side of the support bending member 101 is not connected to any beam body or support body, it is necessary to provide an extension plate 1012 to ensure strength; at the same time, the support bending member 101 with two extension plates 1012 is generally arranged in the middle area of ​​the shell structure 1. Such an arrangement enables one support bending member 101 to support and place two battery cell mechanisms 61. Based on such an arrangement, the essential purpose is to reduce the number of support bending members 101 used and reduce the overall structural weight of the battery pack while ensuring the stable support of the battery cell mechanism 61.

[0073] In the present invention, a reinforcing bending part 102 is also provided on the supporting bending part 101 having two extension plates 1012; the reinforcing bending part 102 includes a reinforcing protrusion 1021, and the reinforcing protrusion 1021 plays a good role in increasing the strength. In the present invention, the reinforcing protrusion 1021 is a U-shaped structure with a vertical cross-section; the reinforcing protrusion 1021 of the U-shaped structure is arranged opposite to the supporting protrusion 1011, and the reinforcing protrusion 1021 and the supporting protrusion 1011 act as a reinforcing beam to ensure the structural strength of the bottom of the battery pack.

[0074] At the same time, in the present invention, a supporting flange 1022 is respectively provided on two opposite sides of the reinforcing protrusion 1021; the reinforcing protrusion 1021 is arranged opposite to the supporting protrusion 1011; the supporting flange 1022 of the reinforcing bending part 102 is attached to the corresponding extension plate 1012; each extension plate 1012 is provided with a fitting flange 1015 at one end away from the supporting protrusion 1011; each supporting bending part 101 is attached to the bottom guard plate 1-1 through the fitting flange 1015; based on such a setting, the mutual connection between the supporting bending part 101 and the reinforcing bending part 102 is facilitated.

[0075] Furthermore, in the present invention, an insulating strip 1014 is provided at one end of the extension plate 1012 away from the support protrusion 1011; the insulating strip 1014 serves as an isolation and protection to ensure the safety of the battery pack. At the same time, in the present invention, the insulating strip 1014 also serves as a good blocking and limiting role, which facilitates lateral limiting of the structural adhesive.

[0076] In the present invention, the insulating strip 1014 is arranged in a raised manner on the extension plate 1012; a glue storage groove 10-1 is formed between the insulating strip 1014 and the supporting protrusion 1011; the formation of the glue storage groove 10-1 facilitates the coating of the structural glue, thereby avoiding overflow of the structural glue during subsequent coating of the structural glue.

[0077] Furthermore, in the present invention, the shell mechanism 2 also includes a middle cross beam 4, and the two ends of the middle cross beam 4 are respectively connected to two oppositely arranged external side beams 21; one function of the middle cross beam 4 of the present invention is to increase the strength of the battery pack, and it can also realize the partitioning of the battery pack; in the present invention, the middle cross beam 4 is generally arranged in a direction perpendicular to the length of the battery pack, and the middle cross beam 4 is directly connected to two parallel and oppositely arranged external side beams 21. Such an arrangement enables the two external side beams 21 and the middle cross beam 4 to form an I-shaped structure, which well ensures the structural strength of the battery pack shell and reduces the damage to the battery cells during subsequent collisions.

[0078] In the present invention, at least two middle cross beams 4 are provided in the shell mechanism 2; one middle cross beam 4 is connected to the middle area of ​​the longitudinal beam 31 in the box, and the other middle cross beam 4 is arranged at the end of the longitudinal beam 31 in the box, and is parallel to the adjacent external side beams 21 and distributed at intervals. Based on such a setting, the present invention forms a high-voltage placement area between the external side beam 21 close to the shell structure 1 and the adjacent middle cross beam 4, and the high-voltage placement area can be used for the placement of the host 8 in the subsequent BMS assembly, and can also be used for the placement of the BDU assembly in the battery pack assembly; and the middle cross beam 4 connected to the longitudinal beam 31 in the box can divide the shell structure 1 into two battery cell mechanism 61 placement areas, while ensuring the overall structural strength of the battery pack, better ensuring the partitioned placement of the battery cell mechanism 61, and optimizing the heat dissipation of the battery cell structure 6.

[0079] At the same time, in the present invention, the middle cross beam 4 is arranged perpendicular to the longitudinal beam 31 in the box; the longitudinal beam 31 in the box is provided with a clamping groove; the longitudinal beam 31 in the box is clamped on the middle cross beam 4 through the clamping groove; based on the above, it can be known that the middle cross beam 4 of the present invention also has an installation limit and positioning function. The two ends of the middle cross beam 4 of the present invention are fixedly connected to the corresponding external side beams 21, and the connection method can be riveting, welding or screwing. While the middle cross beam 4 is fixed, through the setting of the clamping groove on the longitudinal beam 31 in the box, when the longitudinal beam 31 in the box is subsequently installed, the longitudinal beam 31 in the box can be clamped on the middle cross beam 4 through the clamping groove. Such a setting facilitates the connection between the longitudinal beam 31 in the box and the middle cross beam 4; at the same time, even if the longitudinal beam 31 in the box and the middle cross beam 4 need to be fixedly connected later, for example, during welding, the limiting of the clamping groove can also ensure the stability and accuracy of the position of the longitudinal beam 31 in the box during welding.

[0080] Furthermore, in the present invention, a copper bar wiring structure 901 is provided in the shell structure 1. The arrangement of the copper bar wiring structure 901 facilitates the wiring operation in the battery pack. In the present invention, the copper bar wiring structure 901 is mainly arranged in the wiring slot 7 area of ​​the battery pack. Such an arrangement facilitates the lateral wiring of the battery and reduces the longitudinal height of the battery pack. At the same time, in the present invention, the copper bar wiring structure 901 includes a plurality of copper bar buckles 9; each of the copper bar buckles 9 includes a copper bar support 92 and a buckle body 91 arranged on the copper bar support 92; the present invention uses the buckle body 9 1, which facilitates the arrangement of the copper bar buckle 9 on the shell structure 1. In the present invention, the copper bar buckle 9 is connected to the longitudinal beam 31 in the box through a connecting beam 9-1. With this arrangement, when the longitudinal beam 31 in the box is moved later, the corresponding copper bar buckle 9 can be moved as needed, thereby facilitating the connection between the battery cell structure 6 and the copper bar 902, and avoiding the relative change of the position of the copper bar buckle 9 and the battery cell structure 6, which causes a major change in the arrangement of the copper bar 902; a buckle hole is provided on the connecting beam 9-1, and the copper bar buckle 9 is clamped in the buckle hole through the buckle body 91.

[0081] At the same time, in the present invention, the copper busbar 902 support includes a bottom support 921; the bottom support 921 plays a role of bottom support and elevation, and a clamping component 922 is provided on the bottom support 921; the clamping component 922 can be used to support and clamp the copper busbar 902, so as to facilitate the fixation of the copper busbar 902.

[0082] In the present invention, the clamping component 922 includes two clamping plates 923 relatively arranged on the bottom support 921; the two clamping plates 923 are spaced apart to form a copper bar assembly groove 924; the present invention provides the clamping plate 923 so that the upper end of the clamping component 922 disclosed in the present invention has an opening. When the copper bar 902 is subsequently installed, the copper bar 902 can be directly plugged into the copper bar assembly groove 924, which reduces the trouble of the traditional annular buckle needing to be connected from the end of the copper bar 902. Since the present invention has an opening on the top, the copper bar 902 can be directly pressed into the clamping component 922 from top to bottom when used later, which can greatly improve the assembly efficiency of the copper bar 902 and facilitate the subsequent disassembly operation.

[0083] At the same time, in the present invention, each clamping plate 923 is provided with a clamping protrusion 925 at one end away from the bottom support 921; an elastic plate 926 is provided at one end close to the bottom support 921; the elastic plate 926 and the clamping protrusion 925 cooperate with each other to form a barb structure at both ends of the clamping plate 923, which can well limit the position of the upper and lower ends of the copper busbar 902, thereby ensuring the stability of the placement position of the copper busbar 902.

[0084] In the present invention, the elastic plate 926 and the clamping protrusion 925 are distributed at both ends of the clamping plate 923; the elastic plate 926 is arranged obliquely; the oblique arrangement here is generally arranged obliquely upward. Such a design enables the elastic plate 926 to provide a longitudinal supporting force for the copper busbar 902, and cooperate with the clamping protrusion 925 at the end of the clamping plate 923 to achieve the extrusion and fixation of the copper busbar 902; at the same time, the elastic plate 926 has a certain deformation ability, which enables the present invention to fix copper buses 902 of different widths; and it can provide a certain elastic potential energy and has a certain buffering effect.

[0085] In the present invention, the copper busbar 902 is arranged longitudinally, and the overall thickness of the copper busbar 902 is relatively small. In order to optimize the arrangement of the copper busbar 902 and reduce the space occupied by the copper busbar 902, a partition plate is further provided on the bottom support 921 in the present invention; the partition plate is also provided with a clamping protrusion 925 at one end away from the bottom support 921; the partition plate is arranged in the copper busbar assembly groove 924; the partition plate divides the copper busbar assembly groove 924 into two single assembly grooves 9241; the present invention divides the copper busbar assembly groove 924 into two single assembly grooves 9241 through the provision of the partition plate; each single assembly groove 9241 can hold a copper busbar 902, so the above design can well improve the loading capacity of the copper busbar 902 wiring structure 901.

[0086] At the same time, in the present invention, each of the clamping protrusions 925 is provided with a guiding slope 927; the setting of the guiding slope 927 plays a good guiding role, facilitating the insertion of the copper sheet into the corresponding single assembly groove 9241, in other words, facilitating the installation and assembly operation of the copper sheet.

[0087] Furthermore, in the present invention, the inner longitudinal beam 31 and the outer side beam 21 adjacent to and parallel to each other are spaced apart; a cable groove 7 is formed between the inner longitudinal beam 31 and the outer side beam 21 adjacent to and parallel to each other; the cable groove 7 is located on the side of the battery cell structure 6; the battery cell structure 6 is arranged between the two inner longitudinal beams 31 of the present invention, so that there is space between the inner longitudinal beam 31 and the outer side beam 21 adjacent to and parallel to each other, and the space is the above-mentioned cable groove 7. The cable groove 7 of the present invention is arranged on the side of the battery pack, and when the subsequent battery includes internal wiring, lateral wiring is performed. Such an arrangement can well reduce the longitudinal height of the battery pack, making it convenient for the battery pack to be suitable for vehicles with high longitudinal height requirements.

[0088] At the same time, based on the setting of the longitudinal beam 31 in the box, the longitudinal beam 31 in the box plays a good dividing role, which can well reduce the influence of the battery cell structure 6 on the wiring harness arrangement.

[0089] To avoid the traditional wiring harness being routed directly on the battery cell structure 6, in order to avoid the influence of the battery cell structure 6 on the wiring harness, an insulating plate or isolation plate is generally required to be provided on the battery cell structure 6. The present invention can not only reduce the overall height of the battery pack by routing the wiring on the side, but also reduce the investment in insulating plates and isolation classes.

[0090] Furthermore, in the present invention, the frame-type battery pack assembly also includes a wiring harness assembly and a BMS assembly; the wiring harness assembly includes a host 8 wiring harness assembly, and the host 8 wiring harness assembly is routed in a wiring trough 7; the wiring harness is routed in the wiring trough 7, which can reduce the height of the battery pack and reduce the impact of the battery cell structure 6 on the wiring harness.

[0091] At the same time, the BMS assembly described in the present invention includes a host 8 and a slave 81; the host 8 is distributed at the end of the shell structure 1; the slave 81 is distributed in the wiring groove 7; in the present invention, the slave 81 is directly arranged at the outlet end of the corresponding battery cell mechanism 61. Based on the above design, the host 8 and the slave 81 of the present invention are distributed separately, which can avoid too much wiring harness gathering at the front end of the battery pack and making it difficult to connect; and the slave 81 of the present invention can be collected close to the end of the battery cell mechanism 61, saving the length of the wiring harness, and avoiding the problem of too many long wiring harnesses that easily cause cluttered wiring harnesses.

[0092] Furthermore, in the present invention, the shell structure 1 also includes an internal support mechanism; the internal support mechanism includes a support beam 5; one end of the support beam 5 is connected to the external side beam 21; the other end is connected to the longitudinal beam 31 inside the box; in the present invention, the basic function of the support beam 5 is to increase the structural strength of the battery pack itself, and another function is to play a good lateral positioning role. By limiting the length of the support beam 5, the present invention can control the spacing between the external side beam 21 and the longitudinal beam 31 inside the box, and then control the size of the battery cell structure 6 layout area.

[0093] Before connecting the longitudinal beams 31 in the box, the support cross beams 5 are arranged first. Such an arrangement can well calibrate and limit the position of the cross beams in the box, thereby ensuring the accuracy and stability of the placement of the cross beams in the box.

[0094] At the same time, in the present invention, a collapse hole is provided on the bracket cross beam 5; the bracket cross beam 5 of the present invention plays a good role in absorbing energy loss. In subsequent use, the bracket cross beam 5 acts as an energy absorption box. When the battery pack collides sideways, the collision force is first absorbed and collapsed to reduce the stress on the battery cell structure 6, thereby reducing the risk of fire in the battery pack; the collapse hole is located on the side of the bracket cross beam close to the bottom guard plate; of course, according to needs, it can also be set above the bracket cross beam. Of course, it is also feasible for the present invention to use the energy absorption box of a traditional vehicle as the bracket cross beam.

[0095] In addition, when assembling the shell structure in the present invention, it is required that the outer shell mechanism be assembled in advance, and then the middle beams are installed, and then the support beams are connected, and then the longitudinal beams in the box are clamped on the support beams, and then the side surfaces of each support beam are fit with the ends of the support beams. Based on such an assembly sequence, the stability and accuracy of the installation of the longitudinal beams in the box can be well guaranteed, and the deflection and misalignment of the longitudinal beams in the box can be avoided; the middle beams and the support beams of the present invention can cooperate with each other to realize the installation and positioning of the longitudinal beams in the box.

[0096] Furthermore, in the present invention, a connector 22 is provided on the external side beam 21 at the front end and the rear end of the battery; in the present invention, the connector 22 is connected to the external side beam 21 through a connecting plate assembly; the connecting plate assembly includes a connecting plate body, and the connecting plate body is provided with a rivet nut; the external side beam 21 is provided with a mounting through hole; the connector 22 is connected to the external side beam 21 through the connecting plate assembly; the present invention provides a good bridging effect through the provision of the connecting plate assembly, which facilitates the connection of the connector 22 to the external side beam 21; at the same time, the present invention can avoid the trouble of directly connecting the connector 22 to the external side beam 21 through the provision of the connecting plate assembly.

[0097] In the traditional installation method, the rivet nut is generally directly connected to the external side beam 21. The rivet nut is easy to fail or be damaged during the transportation or processing of the shell structure 1, and the damage of the rivet nut will affect the installation of the connector 22 on the external side beam 21; however, after the shell structure 1 in the battery pack is welded, due to its large size, larger equipment is required for rework, and the tooling size requirements are high, which means it is not easy to rework.

[0098] Therefore, in the traditional use process, the damaged area of ​​the rivet nut is mostly sealed by glue. This operation method will increase the working hours and material costs, resulting in a waste of resources. Moreover, the glue needs to be cured before the next step can be carried out, which seriously affects the efficiency of product rework. In addition, if the glue after rework is unevenly applied or affected by gravity, there will be problems of poor sealing.

[0099] Therefore, in order to solve the above problems, the present invention connects the connector 22 and the external side beam 21 through a connecting plate assembly. Even when a rivet nut is damaged, the overall size of the connecting plate assembly is small, which is convenient for rework and maintenance on the machine tool and replacement of a new rivet nut.

[0100] In the present invention, the connecting plate assembly includes a connecting plate body, on which a rivet nut is provided; the external side beam 21 is provided with a mounting through hole; the connector 22 is connected to the external side beam 21 through the connecting plate assembly; in the present invention, the connecting plate body is a flat plate structure, on which a nut mounting hole is provided, and the rivet nut is connected in the nut mounting hole; subsequently, the mounting through hole on the external side beam 21 is passed through the plug-in bolt to connect with the rivet nut on the connecting plate assembly, thereby realizing the connection of the connecting plate assembly to the external side beam 21; at the same time, the connector 22 can also be directly connected to the external side beam 21 through the plug-in bolt.

[0101] At the same time, in order to ensure the sealing between the connecting plate assembly and the external side beam 21, a sealing gasket is provided on the connecting plate body in the present invention, and the sealing gasket is attached to the connecting plate body. The setting of the sealing gasket plays a good connection sealing role, thereby ensuring the sealing between the connecting plate assembly and the external side beam 21.

[0102] At the same time, the rivet nut described in the present invention includes a nut body, and a nut head is provided on the nut body; the outer diameter of the nut head is larger than the outer diameter of the nut body at the maximum point; the vertical cross-section of the rivet nut is T-shaped; a sealing layer is provided at the connection between the nut head and the nut body; the T-shaped rivet nut itself has a limiting function, which ensures the stability of the arrangement of the rivet nut on the connecting plate body; at the same time, the sealing layer is arranged at the connection between the nut head and the nut body, and when the rivet nut is deformed later, the sealing layer can fill the gap between the rivet nut and the connecting plate body, thereby optimizing the sealing effect; in addition, in the present invention, the nut head plays a good blocking and limiting role, thereby avoiding excessive extrusion pressure between the connecting plate body and the external side beam 21 during subsequent assembly, thereby causing the sealing gasket to lose its elasticity.

[0103] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A frame-type battery pack assembly, characterized in that: It includes a housing structure; a battery cell structure is provided inside the housing mechanism; The housing structure includes a bottom guard plate; an outer shell mechanism and an inner frame mechanism are provided on the bottom guard plate; the outer shell mechanism includes four outer side beams; the four outer side beams are sequentially connected to form a frame structure with a rectangular projection in plan view; The inner frame mechanism includes two box inner longitudinal beams arranged in parallel at intervals; the area between the two box inner longitudinal beams is used to arrange the battery cell structure; The battery cell structure includes a plurality of battery cell mechanisms, each battery cell mechanism includes a plurality of single battery cells, and the plurality of single battery cells in each battery cell mechanism are sequentially arranged from one box inner longitudinal beam to another box inner longitudinal beam.

2. A frame-type battery pack assembly according to claim 1, characterized in that: The inner frame mechanism further includes a battery cell support mechanism; the battery cell support mechanism includes a support bending member; both ends of the support bending member are respectively connected to the two box inner longitudinal beams; Each support bending member includes a support protrusion; At least one side of the support protrusion is provided with an extension plate; one end of the extension plate in each support bending member is connected to the corresponding support protrusion, and the other end extends away from the support protrusion; a structural adhesive layer is provided on the extension plate.

3. A frame-type battery pack assembly according to claim 2, characterized in that: The battery cell support mechanism includes a plurality of support bending members; adjacent support bending members are arranged at intervals; at least one support bending member in the battery cell support mechanism has an extension plate on each side of the support protrusion; a strengthening bending member is further provided on the support bending member with two extension plates; the strengthening bending member includes a strengthening protrusion, and a support flange is provided on each of the opposite sides of the strengthening protrusion; the strengthening protrusion and the support protrusion are arranged oppositely; the support flange of the strengthening bending member is attached to the corresponding extension plate; a fitting flange is provided at one end of each extension plate away from the support protrusion; each support bending member is attached to the bottom guard plate through the fitting flange.

4. A frame-type battery pack assembly according to claim 3, characterized in that: An insulating strip is provided at one end of the extension plate away from the support protrusion; the insulating strip is provided in a convex shape on the extension plate; a glue storage groove is formed between the insulating strip and the support protrusion.

5. The frame-type battery pack assembly according to claim 1, characterized in that: The outer shell mechanism further includes a middle cross beam, and both ends of the middle cross beam are respectively connected to two relatively arranged outer side beams; the middle cross beam is perpendicular to the box inner longitudinal beam; a clamping groove is provided on the box inner longitudinal beam; the box inner longitudinal beam is clamped to the middle cross beam through the clamping groove.

6. The frame-type battery pack assembly according to claim 1, characterized in that: A copper busbar wiring structure is provided inside the housing structure, and the copper busbar wiring structure includes a plurality of copper busbar buckles; each copper busbar buckle includes a copper busbar support and a buckle body provided on the copper busbar support; The copper busbar support includes a bottom support; a clamping member is provided on the bottom support; the clamping member includes two clamping plates oppositely arranged on the bottom support; a copper busbar assembly groove is formed by the interval distribution between the two clamping plates; a clamping protrusion is provided at one end of each clamping plate away from the bottom support; an elastic plate is provided at one end close to the bottom support; the elastic plate and the clamping protrusion are distributed at both ends of the clamping plate; the elastic plate is inclined.

7. The frame-type battery pack assembly according to claim 6, characterized in that: A partition plate is further provided on the bottom support; a clamping protrusion is also provided at one end of the partition plate away from the bottom support; the partition plate is arranged in the copper busbar assembly groove; the partition plate divides the copper busbar assembly groove into two single assembly grooves; A guiding inclined surface is provided on each clamping protrusion.

8. The frame-type battery pack assembly according to claim 1, characterized in that: The longitudinal beams in the box and the external side beams adjacent to and parallel to each other are spaced apart; a wiring groove is formed between the longitudinal beams in the box and the external side beams adjacent to and parallel to each other; the wiring groove is located on the side of the battery cell structure.

9. The frame-type battery pack assembly according to claim 8, characterized in that: The frame-type battery pack assembly also includes a wiring harness assembly and a BMS assembly; the wiring harness assembly includes a host wiring harness assembly, and the host wiring harness assembly is routed in a wiring trough; the BMS assembly includes a host and a slave; the host is distributed at the end of the shell structure; and the slave is distributed in the wiring trough.

10. The frame-type battery pack assembly according to claim 1, characterized in that: The shell structure also includes an internal support mechanism; the internal support mechanism includes a support beam; one end of the support beam is connected to the external side beam; and the other end is connected to the longitudinal beam inside the box.

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