Battery pack box body

Abstract

The utility model discloses a battery pack box body which comprises a box body frame with an open top, an upper-layer battery module and a lower-layer battery module which are vertically arranged are distributed in the box body, the side wall of the box body frame is peripherally enclosed, a plurality of first placing areas for accommodating the lower-layer battery module are arranged in the box body frame, and a plurality of second placing areas for accommodating the lower-layer battery module are arranged in the box body frame. The box body comprises a bracket arranged at the top of the box body frame, the bracket is provided with a second placement area for accommodating the upper-layer battery module, and the bracket is fixedly connected with the box body frame so as to fix the upper-layer battery module to the box body. By arranging the box body frame with the open top, when the lower-layer battery module in the box body frame is placed in the first placing area, the lower-layer battery module is hoisted downwards from the top, and compared with a mode of pushing in from one side of the box body, the box body does not need to be subjected to complex limiting assembly matching with the lower-layer battery module, so that a matching limiting structure of the interior of the box body and the battery module is simplified; and the processing difficulty is reduced, and when battery modules with different specifications are adapted, the box body is simply and adaptively adjusted.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of vehicle battery replacement, and particularly relates to a battery pack box body. BACKGROUND

[0002] Electric vehicles have the advantages of zero emission, low noise, high cost performance of operation and maintenance, and are more and more favored by users.

[0003] With the rapid development of electric vehicles, the popularization rate is rapidly increasing, and the indispensable battery module also develops diversely. The battery modules on the market have more categories and various sizes. In order to optimize the layout of multiple battery modules in the prior art, multiple battery modules are usually arranged in the battery pack box body, and a matching assembly is arranged in the box body to fix and install the battery modules, so as to realize the centralized installation of the battery modules through the battery pack box body. However, due to the diversity of the size and specification of the battery modules, the internal structure of the battery pack box body and the components arranged in the internal structure which functionally cooperate with and assemble with the battery modules need to be adjusted for different types of battery modules, resulting in a long development cycle. CONTENT OF THE UTILITY MODEL

[0004] The application provides a battery pack box body, which simplifies the cooperation structure between the internal box body and the battery module, and realizes stable hoisting assembly through the cooperation of the bracket and the battery module.

[0005] The technical scheme adopted by the application is as follows:

[0006] A battery pack box body comprises a box frame with an open top, the box body is distributed with upper layer battery modules and lower layer battery modules arranged in a vertical direction, the side wall of the box frame is circumferentially enclosed, a plurality of first placement areas for accommodating the lower layer battery modules are arranged in the box frame, the box body comprises a bracket arranged on the top of the box frame, the bracket is provided with a second placement area for accommodating the upper layer battery modules, and the bracket is fixedly connected with the box frame to fix the upper layer battery modules to the box body.

[0007] The box frame with an open top is arranged, when the lower layer battery modules in the internal box frame are placed in the first placement area, the lower layer battery modules are directly assembled from the top, compared with the existing installation mode of pushing from one side of the box body, the installation is performed from the open top of the box frame, and the side wall and the bottom of the box body do not need to be complexly assembled with the lower layer battery modules, which is beneficial to simplify the box layout, simplify the cooperation and limiting structure of the internal box body and the battery module, reduce the difficulty of processing and forming, and when different specifications of battery modules are adapted, the box body can be adaptively adjusted according to the size of the battery modules.

[0008] Meanwhile, the bracket arranged in cooperation with the box frame is fixed to the top of the box frame, so that the top of the box frame forms a second placement area, the number of battery modules accommodated by the box is increased, and the battery modules are orderly distributed into upper battery modules and lower battery modules, so that the battery modules are conveniently managed in a centralized manner. The fixing of the bracket on the top of the box frame limits the lower battery modules in the first placement area in the vertical direction, and can form a partition between the lower battery modules and the upper battery modules, so as to avoid assembly interference between the lower battery modules and the upper battery modules, and also avoid collision and abrasion between the lower battery modules and the upper battery modules, thereby achieving partition protection of the lower battery modules and the upper battery modules.

[0009] In addition, the positioning of the lower battery modules on the box frame is realized by the fixing of the bracket on the box frame, and the assembly stability of the bracket and the battery frame is improved, and the support stability of the bracket for the lower battery modules is improved.

[0010] In a preferred implementation manner of the battery pack box, the bracket is provided with a positioning assembly for fixing the upper battery modules, and the upper battery modules are fixedly connected to the bracket through the positioning assembly.

[0011] The upper battery modules are fixed on the bracket through the positioning assembly, so that the stable positioning of the upper battery modules is realized, and when the bracket is fixedly connected to the box frame, the fixed connection of the upper battery modules to the box frame is indirectly realized, so that the collision or displacement of the upper battery modules caused by the shaking of the bracket is effectively avoided, and the position stability of the upper battery modules in the box is realized.

[0012] In a preferred implementation manner of the battery pack box, the bracket includes a first support part connected to the box frame and a second support part connected to the first support part, and the positioning assembly is arranged on the first support part and / or the second support part.

[0013] The first support part is arranged to fix the bracket to the box frame, and the second support part is arranged to improve the connection strength of the first support part to the box frame, and the upper battery modules can be fixed through the second support part. The first support part and the second support part can realize the connection of the bracket to the box frame and the connection of the upper battery modules to the bracket. When the upper battery modules are fixed to the first support part and / or the second support part through the positioning assembly, the bracket is connected and fixed to the box frame through the first support part, so that the position of the upper battery modules in the box frame is fixed.

[0014] In a preferred implementation of the battery pack box, the first support part comprises at least two first support plates arranged along the length direction of the box frame, the second support part comprises a second support plate arranged along the width direction of the box frame, two ends of the second support plate are respectively connected to the first support plates on both sides, and the positioning assembly comprises positioning holes arranged on the first support plates and / or the second support plate and fasteners penetrating through the positioning holes and fixed to the upper battery module.

[0015] The first support plates are connected to the box frame to connect the bracket to the box frame, the second support plates are arranged between the first support plates to strengthen the connection between the first support plates and the box frame, and the support strength of the bracket on the upper battery module is improved, the stress is dispersed, and the bracket is prevented from being subjected to too much stress in the axial direction, thereby facilitating the load stability and reliability of the bracket on the upper battery module. The positioning holes arranged on the first support plates and / or the second support plates are used to fix the upper battery module at multiple positions, so that the upper battery module is fixed to the bracket under the action of the fasteners. This positioning method is simple and effective, the positioning holes are simple to process, the fasteners are simple to assemble, and the upper battery module can be quickly and effectively fixed to the bracket by the positioning assembly.

[0016] In a preferred implementation of the battery pack box, a plurality of second support plates are arranged along the length direction of the battery module, and the first support plates and the second support plates are respectively provided with a plurality of positioning holes.

[0017] The second support plates are evenly arranged between the two first support plates, a plurality of positioning holes are distributed along the length direction of the bracket, each group of positioning holes is evenly distributed along the width direction, and the positioning holes are preferably arranged in rows on the second support plates, so that the support strength is not insufficient due to all the second support plates being provided with the positioning holes, the positioning effect on the upper battery module is achieved, the support strength on the upper battery module is ensured, the number of fasteners is reduced, and the assembly difficulty is reduced.

[0018] In a preferred implementation of the battery pack box, the box frame is provided with a first mounting part, the bracket is provided with a second mounting part, and the bracket is connected to the first mounting part through the second mounting part to achieve fixed connection with the box frame.

[0019] The bracket is mounted on the box frame through the connection between the first mounting part and the second mounting part, so that the bracket is fixed to the box frame, and the bracket is prevented from being displaced relative to the box frame due to unstable stress or other reasons when the bracket bears the upper battery module.

[0020] In a preferred implementation of the battery pack box, a partition beam extending along the length direction of the battery module is arranged in the box frame, and a first placement area is formed between adjacent partition beams and between the partition beam and the side wall of the adjacent box frame.

[0021] The present scheme separates the box frame into multiple first placement areas by arranging the partition beam, realizes the orderly placement of the lower layer battery module, realizes the separation and arrangement of the internal space of the box frame, realizes the orientation guidance when placing the lower layer battery module through the position of the partition beam, makes the lower layer battery module have multiple clearly divided lower layer placement areas, avoids the placement disorder of the lower layer battery module, and makes the placement number and placement position of the lower layer battery module in the box frame accurate.

[0022] In a preferred implementation of the battery pack box, the box frame includes two opposite first sealing plates arranged along the length direction of the battery module and two opposite second sealing plates arranged along the width direction of the battery module, the first sealing plate and the second sealing plate enclose to form the side wall of the box frame, the first mounting part includes a first mounting hole arranged on the first sealing plate and / or the second sealing plate and / or the partition beam, the second mounting part includes a second mounting hole arranged on the bracket, and the first mounting hole and the second mounting hole are fixedly connected through the fastener.

[0023] The present scheme forms a square box frame by enclosing the first sealing plate and the second sealing plate, and the top of the box frame is open. This type of box frame is similar to the form of the battery module, so as to reasonably plan the space to place the battery module and reduce the space waste. The first mounting hole and the second mounting hole are arranged and connected in position, so as to realize the connection between the bracket and the box frame.

[0024] In a preferred implementation of the battery pack box, the first mounting part further includes a reinforcing plate arranged at the first sealing plate and / or the second sealing plate, the reinforcing plate is provided with a third mounting hole, the second mounting part is further provided with a fourth mounting hole on the bracket, and the third mounting hole and the fourth mounting hole are fixedly connected through the fastener.

[0025] The present scheme improves the fixing stability of the bracket in the box frame and the support strength of the bracket to the upper layer battery module by arranging the reinforcing plate and the bracket, and strengthens the support stability of the box frame to the bracket. The reinforcing plate is arranged at the first sealing plate and / or the second sealing plate. Since the first sealing plate and the second sealing plate are connected with the bracket, arranging the reinforcing plate is beneficial to dispersing the stress at the connection of the first sealing plate and the second sealing plate, so as to ensure the stable placement of the upper layer battery module on the bracket.

[0026] In a preferred implementation of the battery pack box, the reinforcing plate includes a first reinforcing plate connecting the inner side walls of the first sealing plate and the second sealing plate.

[0027] And / or, the reinforcing plate comprises a second reinforcing plate connecting the outer side wall of the partition beam and the inner side wall of the second sealing plate.

[0028] The first reinforcing plate is arranged to connect the bracket with the corner connecting part of the first sealing plate and the second sealing plate, thereby improving the structural strength of the corner connecting part, and the bracket is further connected and fixed with the first sealing plate and the second sealing plate, thereby further improving the overall structural stability.

[0029] Similarly, the second reinforcing plate is arranged to be fixed at the corner formed by the connection between the outer side wall of the partition beam and the second sealing plate, thereby improving the connection structural strength of the corner, which is beneficial to improving the connection structural strength of the partition beam and the second sealing plate, and is also beneficial to improving the connection stability between the bracket and the partition beam and the second sealing plate, thereby further improving the overall structural stability.

[0030] In a preferred implementation manner of the battery pack box body, the top of the partition beam is provided with a boss extending upward in the vertical direction, and the boss is provided with a locking member for cooperating with a locking mechanism on the electric vehicle to fix the battery pack box body to the electric vehicle.

[0031] The boss at the top of the partition beam is used to lock and connect the battery pack box body and the electric vehicle, and since the partition beam extends along the length direction of the box frame, when the boss at the top of the partition beam is locked and connected with the electric vehicle, the partition beam can be used to disperse the force at the connection part, and more than one locking member can be arranged according to the length of the partition beam, and the multi-position locking connection is beneficial to improving the connection balance and stability between the battery pack box body and the electric vehicle. Since the partition beam is partitioned and the bracket is located at the side of the partition beam, the boss at the top of the partition beam will not interfere with the bracket and the upper battery module when being locked and connected with the electric vehicle through the locking member.

[0032] A battery pack assembly method is applied to the battery pack box body of any one of the above, and the method comprises:

[0033] Hoisting the lower battery module to the first placement area and fixing it with the box frame;

[0034] Fixing the upper battery module to the second placement area of the bracket;

[0035] Hoisting the bracket to the box frame and fixing it with the box frame.

[0036] The present scheme can make the internal structure of the box containing the lower battery module, especially the bottom structure, simpler, and the cooperation structure of the lower battery module is reduced, thereby reducing the processing difficulty of the first placement area inside the box, and the lower battery module can be easily hoisted into the box, and the box can accommodate more battery packs of different models and specifications, and the battery model can be easily replaced. When a larger battery module needs to be accommodated, the box structure is simple, and the box can be easily modified to accommodate the hoisting of large-size battery modules. At the same time, by connecting the upper battery module with the bracket first, and then hoisting the upper battery module together with the bracket, the placement of the upper battery module on the bracket is stable, and compared with the way of fixing the bracket first and then hoisting the upper battery module, the way of fixing the bracket and the upper battery module together is convenient for fixing the upper battery module, which reduces the overall assembly difficulty and is beneficial to further improve the assembly efficiency.

[0037] Due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0038] (1) The present scheme sets a box frame with an open top, and the lower battery module inside is placed in the first placement area and directly assembled from the top. Compared with the existing installation method of pushing from the side of the box, the installation from the open top of the box frame eliminates the need for complex assembly and cooperation between the side wall and the bottom of the box and the lower battery module, which is beneficial to simplify the layout of the box and reduce the difficulty of processing and forming.

[0039] At the same time, the bracket arranged in cooperation with the box frame is fixed to the top of the box frame, so that the top of the box frame forms a second placement area, increases the number of battery modules accommodated by the box, and orderly distributes the battery modules into upper and lower battery modules, which is convenient for centralized management of the battery modules. The fixing of the bracket on the top of the box frame limits the vertical position of the lower battery module in the first placement area, and forms a partition between the lower battery module and the upper battery module, avoiding assembly interference between the lower battery module and the upper battery module, and also avoiding collision and wear between the lower battery module and the upper battery module, thereby achieving partition protection of the lower battery module and the upper battery module.

[0040] In addition, the positioning of the lower battery module in the box frame is realized by fixing the bracket in the box frame, which is beneficial to strengthen the assembly stability of the bracket and the battery frame, and improve the support stability of the bracket to the lower battery module.

[0041] (2) by adopting the lifting way to assemble the lower battery module, the box body containing the lower battery module can be made simple, especially the bottom structure of the box body, and the cooperation structure of the lower battery module is reduced, thereby reducing the processing difficulty of the first placing area in the box body, and the lower battery module can be conveniently lifted into the box body, and the box body can accommodate more battery packs of different models and specifications, and the battery model can be conveniently replaced. When a larger battery module needs to be accommodated, the box body structure is simple, and the box body can be easily changed to adapt to the lifting of the large-size battery module. At the same time, by connecting the upper battery module and the bracket first, and then lifting the upper battery module and the bracket together, the upper battery module can be stably placed on the bracket, and compared with the way of fixing the bracket first and then lifting the upper battery module, the way of fixing the bracket and the upper battery module together is convenient for fixing the upper battery module, reduces the overall assembly difficulty, and is beneficial to further improve the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0042] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0043] Figure 1 It is a structural schematic view of the battery pack box body in an embodiment of the present application;

[0044] Figure 2 It is a structural schematic view of the bracket in an embodiment of the present application;

[0045] Figure 3 It is a B part enlarged view of Figure 2

[0046] Figure 4 It is a structural schematic view of the first support part and the second support part in an embodiment of the present application;

[0047] Figure 5 It is a structural schematic view of the first support plate and the second support plate in an embodiment of the present application;

[0048] Figure 6 It is a B part enlarged view of Figure 5

[0049] Figure 7 It is a structural schematic view of the reinforcing plate in an embodiment of the present application;

[0050] Figure 8 It is a C part enlarged view of Figure 7

[0051] Figure 9 ​​​The embodiment of the utility model is the assembly state schematic drawing of the reinforcing plate.

[0052] Figure 10 For Figure 9 The D part enlarged view.

[0053] Mark explanation:

[0054] 100 - box, 110 - box frame, 111 - first placement area, 112 - first sealing plate, 113 - second sealing plate, 120 - bracket, 121 - first support part, 1211 - first support plate, 1212 - third support plate, 122 - second support part, 1221 - second support plate, 1222 - fourth support plate, 123 - positioning hole, 124 - fastener, 125 - second mounting hole, 126 - fourth mounting hole, 127 - second placement area, 130 - partition beam, 131 - boss, 140 - first mounting hole, 150 - reinforcing plate, 1501 - first reinforcing plate, 1502 - second reinforcing plate, 151 - third mounting hole, 200 - upper layer battery module, 300 - lower layer battery module. Specific embodiments

[0055] In order to more clearly illustrate the overall concept of the application, the following will be described in detail with reference to the accompanying drawings.

[0056] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the application, but the application can also be implemented in other ways different from those described herein, therefore, the protection scope of the application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the application and the features in each embodiment can be combined with each other without conflict.

[0057] In addition, in the description of the application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the application.

[0058] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connection", "fixed", and the like, should be construed broadly and can be either fixed connections or detachable connections, or integral; can be mechanical or electrical connections, or communication; can be direct connection, or indirect connection through an intermediate medium, or the internal communication or interaction of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0059] In this application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0060] The application provides a battery pack box body, as shown in Figures 1 to 10 The box body 100 includes a top-open box frame 110, and the upper layer battery module 200 and the lower layer battery module 300 are arranged in the box body 100 in a vertical direction. The side wall of the box frame 110 is circumferentially surrounded, and the box frame 110 is provided with a plurality of first placement areas 111 for accommodating the lower layer battery module 300. The box body 100 includes a bracket 120 arranged at the top of the box frame 110, and the bracket 120 is provided with a second placement area 127 for accommodating the upper layer battery module 200. The bracket 120 is fixedly connected with the box frame 110 to fix the upper layer battery module 200 to the box body 100.

[0061] The box frame 110 is top-open, and the lower layer battery module 300 is directly assembled from the top when placed in the first placement area 111. Compared with the existing installation mode of pushing from one side of the box body 100, the installation from the top of the open box frame 110 does not require complex assembly and cooperation between the side wall and the bottom of the box body 100 and the lower layer battery module 300, which is beneficial to simplify the layout of the box body 100 and reduce the difficulty of processing and molding.

[0062] Meanwhile, the bracket 120 arranged in cooperation with the box frame 110 is fixed to the top of the box frame 110, so that the top of the box frame 110 forms a second placement area 127, thereby increasing the number of battery modules accommodated by the box 100, and orderly distributing the battery modules into upper battery modules 200 and lower battery modules 300, facilitating centralized management of the battery modules. The fixing of the bracket 120 on the top of the box frame 110 limits the lower battery modules 300 in the first placement area 111 in the vertical direction, and can form a partition between the lower battery modules 300 and the upper battery modules 200, avoiding assembly interference between the lower battery modules 300 and the upper battery modules 200, and also avoiding collision and wear between the lower battery modules 300 and the upper battery modules 200, thereby achieving partition protection of the lower battery modules 300 and the upper battery modules 200.

[0063] In addition, the fixing of the bracket 120 on the box frame 110 realizes the positioning of the lower battery modules 300 on the box frame 110, and is conducive to enhancing the assembly stability of the bracket 120 and the battery frame, and improving the support stability of the bracket 120 on the lower battery modules 300.

[0064] In an embodiment, the bracket 120 is provided with a positioning assembly for fixing the upper battery modules 200, and the upper battery modules 200 are fixedly connected to the bracket 120 through the positioning assembly.

[0065] The scheme fixes the upper battery modules 200 on the bracket 120 through the positioning assembly, thereby realizing stable positioning of the upper battery modules 200, and indirectly realizing fixed connection of the upper battery modules 200 and the box frame 110 when the bracket 120 is fixedly connected to the box frame 110, thereby effectively avoiding collision or displacement of the upper battery modules 200 due to shaking of the upper battery modules 200 on the bracket 120, and realizing stable position of the upper battery modules 200 in the box 100.

[0066] Further, as shown in Figures 4 to 6 The bracket 120 includes a first support part 121 connected to the box frame 110 and a second support part 122 connected to the first support part 121, and the positioning assembly is arranged on the first support part 121 and / or the second support part 122.

[0067] The first support part 121 is arranged to fix the bracket 120 to the box frame 110, and the second support part 122 is arranged to strengthen the connection strength between the first support part 121 and the box frame 110, and the second support part 122 can be used to fix the upper layer battery module 200. The first support part 121 and the second support part 122 can be used to connect the bracket 120 and the box frame 110, and can be used to connect the upper layer battery module 200 and the bracket 120. When the upper layer battery module 200 is fixed to the first support part 121 and / or the second support part 122 by the positioning assembly, and the bracket 120 is fixed to the box frame 110 by the first support part 121, the position of the upper layer battery module 200 in the box frame 110 is fixed.

[0068] Preferably, the first support part 121 includes at least two first support plates 1211 arranged along the length direction of the box frame 110, the second support part 122 includes a second support plate 1221 arranged along the width direction of the box frame 110, both ends of the second support plate 1221 are connected to the first support plates 1211 on both sides, and the positioning assembly includes positioning holes 123 arranged on the first support plates 1211 and / or the second support plate 1221 and fasteners 124 penetrating through the positioning holes 123 and fixed to the upper layer battery module 200.

[0069] The first support plate 1211 is arranged to connect the bracket 120 and the box frame 110, the second support plate 1221 is arranged to strengthen the connection strength between the first support plate 1211 and the box frame 110, and to improve the support strength of the bracket 120 to the upper layer battery module 200, to disperse the support stress, and to avoid the bracket 120 from being subjected to too much stress in the axial direction, thereby facilitating the load stability and reliability of the bracket 120 to the upper layer battery module 200. The positioning holes 123 arranged on the first support plates 1211 and / or the second support plate 1221 are used to fix the upper layer battery module 200 at multiple positions, so that the upper layer battery module 200 is fixed to the bracket 120 under the action of the fasteners 124. This positioning method is simple and effective, the positioning holes 123 are simple to process, the fasteners 124 are simple to assemble, and the positioning assembly can be used to quickly and effectively fix the upper layer battery module 200 to the bracket 120.

[0070] Preferably, as shown in Figure 5 The second support plate 1221 is arranged to have multiple second support plates 1221 arranged along the length direction of the battery module, and each first support plate 1211 and second support plate 1221 is arranged to have multiple positioning holes 123.

[0071] The scheme is characterized in that a plurality of second support plates 1221 are evenly arranged between the two first support plates 1211, and a plurality of groups of positioning holes 123 are distributed along the length direction of the bracket 120, and each group of positioning holes 123 is evenly distributed along the width direction, preferably, the positioning holes 123 are arranged alternately on the plurality of second support plates 1221, so as to avoid that all the second support plates 1221 start the positioning holes 123 and cause insufficient support strength, thereby achieving the positioning effect on the upper-layer battery module 200 and ensuring the support strength of the upper-layer battery module 200, and reducing the number of fasteners 124 and the assembly difficulty.

[0072] In an embodiment, the box frame 110 is provided with a first mounting portion, the bracket 120 is provided with a second mounting portion, and the bracket 120 is connected to the first mounting portion through the second mounting portion to achieve the fixed connection with the box frame 110.

[0073] The scheme is characterized in that the bracket 120 is mounted on the box frame 110 through the connection between the first mounting portion and the second mounting portion, so that the bracket 120 is fixed to the box frame 110, and displacement of the bracket 120 relative to the box frame 110 is avoided when the bracket 120 bears the upper-layer battery module 200.

[0074] Further, as shown in Figure 2 、 Figure 4 、 Figure 7 The box frame 110 is provided with a partition beam 130 extending along the length direction of the battery module, and the first placement area 111 is formed between adjacent partition beams 130 and between the partition beam 130 and the side wall of the adjacent box frame 110.

[0075] The scheme is characterized in that the box frame 110 is divided into a plurality of first placement areas 111 by the partition beam 130, the orderly placement of the lower-layer battery module 300 is achieved, the internal space of the box frame 110 is arranged in a partitioned manner, the position of the partition beam 130 achieves the directional guidance when the lower-layer battery module 300 is placed, the lower-layer battery module 300 has a plurality of clearly divided lower-layer placement areas, the placement of the lower-layer battery module 300 is avoided to be disordered, and the number and the placement position of the lower-layer battery module 300 in the box frame 110 are accurate.

[0076] Further, the box frame 110 comprises two opposite first sealing plates 112 arranged along the length direction of the battery module and two opposite second sealing plates 113 arranged along the width direction of the battery module, the first sealing plates 112 and the second sealing plates 113 enclose to form the side walls of the box frame 110, the first mounting part comprises first mounting holes 140 arranged on the first sealing plates 112 and / or the second sealing plates 113 and / or the partition beams 130, the second mounting part comprises second mounting holes 125 arranged on the bracket 120, and the first mounting holes 140 and the second mounting holes 125 are fixedly connected through fasteners 124.

[0077] The box frame 110 is formed by the first sealing plates 112 and the second sealing plates 113, which is square and open at the top, and the box frame 110 is similar to the shape of the battery module, so as to reasonably arrange the space for placing the battery module and reduce the space waste. The bracket 120 is connected with the box frame 110 by arranging the first mounting holes 140 and the second mounting holes 125 and aligning and connecting the first mounting holes 140 and the second mounting holes 125.

[0078] Further, the first support part 121 comprises two third support plates 1212 perpendicular to the first support plate 1211, the second support part 122 comprises a fourth support plate 1222 connected to the two third support plates 1212 at both ends, the third support plates 1212 and the fourth support plate 1222 enclose to form the side walls of the bracket 120, the third support plates 1212 and the fourth support plate 1222 are respectively provided with the second mounting holes 125, the third support plates 1212 are fixedly connected with the adjacent first sealing plates 112 or the partition beams 130 through the fasteners 124, the fourth support part is fixedly connected with the adjacent second sealing plates 113 through the fasteners 124, and the bracket 120 is fixed in the box frame 110.

[0079] In addition, as shown in Figure 7 , Figure 9 , the first mounting part further comprises a reinforcing plate 150 arranged at the first sealing plates 112 and / or the second sealing plates 113, the reinforcing plate 150 is provided with third mounting holes 151, the second mounting part further comprises fourth mounting holes 126 arranged on the bracket 120, and the third mounting holes 151 and the fourth mounting holes 126 are fixedly connected through the fasteners 124.

[0080] The connection of the reinforcing plate 150 and the bracket 120 improves the fixing stability of the bracket 120 on the box frame 110 and the supporting strength of the bracket 120 on the upper battery module 200, and the reinforcing plate 150 is arranged at the first sealing plate 112 and / or the second sealing plate 113, so that the reinforcing plate 150 is arranged at the connection of the first sealing plate 112 and the second sealing plate 113, and the bracket 120, so that the reinforcing plate 150 is arranged to disperse the stress at the connection of the first sealing plate 112 and the second sealing plate 113, thereby ensuring the stable placement of the upper battery module 200 on the bracket 120.

[0081] Further, the reinforcing plate 150 includes a first reinforcing plate 1501 connected to the inner side wall of the first sealing plate 112 and the second sealing plate 113.

[0082] Further, the reinforcing plate 150 includes a first reinforcing plate 1501 connected to the inner side wall of the first sealing plate 112 and the second sealing plate 113.

[0083] The first reinforcing plate 1501 is arranged to connect the bracket 120 and the corner of the first sealing plate 112 and the second sealing plate 113, thereby improving the structural strength of the corner, and further connecting the bracket 120 and the first sealing plate 112 and the second sealing plate 113, thereby further improving the overall structural stability.

[0084] Similarly, the second reinforcing plate 1502 is arranged to be fixed at the corner formed by the connection of the outer side wall of the partition beam 130 and the second sealing plate 113, thereby improving the structural strength of the corner, which is beneficial to improving the structural strength of the connection of the partition beam 130 and the second sealing plate 113, and improving the connection stability between the bracket 120 and the partition beam 130 and the second sealing plate 113, thereby further improving the overall structural stability.

[0085] Preferably, as shown in Figures 7 to 10 , the first reinforcing plate 1501 and the second reinforcing plate 1502 are arranged simultaneously.

[0086] In one embodiment, as shown in Figure 4 , the partition beam 130 is provided with a boss 131 extending upward in the vertical direction, and the boss 131 is provided with a locking member for cooperating with a locking mechanism on the electric vehicle to fix the battery pack box 100 on the electric vehicle.

[0087] The convex portion 131 at the top of the partition beam 130 is used to achieve the locking connection between the battery pack box body 100 and the electric vehicle, and since the partition beam 130 is arranged along the length direction of the box frame 110, when the convex portion 131 at the top of the partition beam 130 is locked with the electric vehicle, the partition beam 130 can achieve the dispersion of force at the connection, and more than one locking part can be arranged according to the length of the partition beam 130, and the multi-position locking connection is beneficial to improve the connection balance and stability between the battery pack box body 100 and the electric vehicle. At the same time, since the partition beam 130 is partitioned and the bracket 120 is located at the side of the partition beam 130, the convex portion 131 at the top of the partition beam 130 will not interfere with the position of the bracket 120 and the upper layer battery module 200 when it is locked with the electric vehicle through the locking part.

[0088] A battery pack assembly method is applied to the battery pack box body 100 of any of the above embodiments, and the method comprises:

[0089] The lower layer battery module 300 is hoisted to the first placement area 111 and fixed with the box frame 110;

[0090] The upper layer battery module 200 is fixed to the second placement area 127 of the bracket 120;

[0091] The bracket 120 is hoisted to the box frame 110 and fixed with the box frame 110.

[0092] In the present application, the lower layer battery module 300 is assembled by hoisting, which can make the internal structure of the box 100 that contains the lower layer battery module 300, especially the bottom structure, simpler, and the cooperation structure with the lower layer battery module 300 is reduced, thereby reducing the processing difficulty of the first placement area 111 inside the box 100, and the lower layer battery module 300 can be hoisted into the box 100 conveniently, and the box 100 can accommodate more battery packs of different models and specifications, and the battery model can be replaced conveniently. When a larger battery module needs to be accommodated, since the structure of the box 100 is simple, the box 100 can be easily modified to accommodate the hoisting of the large-size battery module. By first connecting the upper layer battery module 200 with the bracket 120, and then hoisting the upper layer battery module 200 together with the bracket 120, the placement position of the upper layer battery module 200 on the bracket 120 is stable, and compared with the way of first fixing the bracket 120 and then hoisting the upper layer battery module 200, the way of fixing the bracket 120 and the upper layer battery module 200 together is convenient for fixing the upper layer battery module 200, which reduces the overall assembly difficulty and is beneficial to further improve the assembly efficiency.

[0093] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0094] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0095] The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A battery pack case characterized by, The application relates to a battery module box frame, which comprises a box frame with an open top, upper and lower battery modules arranged in a vertical direction in the box, a side wall of the box frame being circumferentially surrounded, a plurality of first placement areas for accommodating the lower battery modules being arranged in the box frame, and a bracket arranged on the top of the box frame, the bracket being provided with a second placement area for accommodating the upper battery module, and the bracket being fixedly connected with the box frame so that the upper battery module is fixed to the box.

2. The battery pack enclosure of claim 1, wherein, The bracket is provided with a positioning assembly for fixing the upper battery module, and the upper battery module is fixedly connected with the bracket through the positioning assembly.

3. The battery pack enclosure of claim 2, wherein, The bracket comprises a first supporting part connected with the box frame and a second supporting part connected with the first supporting part, and the positioning assembly is arranged on the first supporting part and / or the second supporting part.

4. The battery pack enclosure of claim 3, wherein, The first supporting part comprises at least two first supporting plates arranged along the length direction of the box frame, the second supporting part comprises a second supporting plate arranged along the width direction of the box frame, the two ends of the second supporting plate are respectively connected with the first supporting plates on the two sides, and the positioning assembly comprises positioning holes arranged on the first supporting plates and / or the second supporting plate and fasteners penetrating through the positioning holes and fixed to the upper battery module.

5. The battery pack enclosure of claim 4, wherein, The second supporting plate is provided with a plurality of positioning holes.

6. The battery pack enclosure of claim 1, wherein, The box frame is provided with a first mounting part, the bracket is provided with a second mounting part, and the bracket is connected with the first mounting part through the second mounting part to realize fixed connection with the box frame.

7. The battery pack enclosure of claim 6, wherein, The box frame is provided with a partition beam extending along the length direction of the battery module, and the first placement area is formed between adjacent partition beams and between the partition beam and the side wall of the adjacent box frame.

8. The battery pack enclosure of claim 7, wherein, The box frame comprises two opposite first sealing plates arranged along the length direction of the battery module and two opposite second sealing plates arranged along the width direction of the battery module, the first sealing plates and the second sealing plates are circumferentially surrounded to form the side wall of the box frame, the first mounting part comprises first mounting holes arranged on the first sealing plates and / or the second sealing plates and / or the partition beam, the second mounting part comprises second mounting holes arranged on the bracket, and the first mounting holes and the second mounting holes are fixedly connected through fasteners.

9. The battery pack enclosure of claim 8, wherein, The first mounting part further comprises a reinforcing plate arranged at the first sealing plate and / or the second sealing plate, the reinforcing plate is provided with third mounting holes, the second mounting part is further provided with fourth mounting holes on the bracket, and the third mounting holes and the fourth mounting holes are fixedly connected through fasteners.

10. The battery pack enclosure of claim 9, wherein, The reinforcing plate comprises a first reinforcing plate connecting the inner side walls of the first sealing plate and the second sealing plate. The reinforcing plate comprises a second reinforcing plate connecting the outer side walls of the partition beam and the inner side walls of the second sealing plate.

11. The battery pack enclosure of claim 7, wherein, The partition beam top is provided with a vertical upward extending boss, and the boss is provided with a locking member for cooperating with a locking mechanism on the electric vehicle to fix the battery pack box to the electric vehicle.

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