A battery box

Abstract

This invention belongs to the field of automotive battery box technology and discloses a battery box, including: a box body, the upper surface of which is provided with an outer sealing groove and an inner sealing groove. An outer sealing ring is pressed by an outer pressure frame embedded in the outer sealing groove, thereby achieving an outer layer seal. At the same time, an inner sealing ring is pressed by an inner pressure frame embedded in the inner sealing groove, thereby achieving an inner layer seal for the box body cover. The staggered arrangement of the inner and outer sealing grooves and the inner and outer pressure frames improves the overall sealing effect of the battery box. A pressure plate abuts against an isolation frame, and the pressure plate presses the isolation frame under the action of a spring, so that the support base plate is tightly attached to the bottom of the box body, thereby improving the stability of the battery bracket installed in the box body. At the same time, the installation of the battery module in the battery bracket reduces the space waste caused by the positioning of the mounting components, thereby increasing the energy density of the battery module and maximizing the utilization of space inside the battery box.

Description

Technical Field

[0001] This invention belongs to the field of automotive battery box technology, and specifically relates to a battery box. Background Technology

[0002] The battery box mainly consists of a battery protective shell, a battery pack, and a connecting device. The number of batteries inside the battery box and the shape of the battery box vary depending on the power supply required and the connection method. However, the working principle is similar. The battery pack is placed inside the battery box and connected to the power supply device through the through slot on the outside of the battery box to achieve the effect of portable power supply.

[0003] In the prior art, the Chinese utility model publication with publication number CN206179912U discloses a battery module fixing structure. The module fixing component of this patent runs across the entire end face of the module, and the fixing component is designed at or near the bottom of the module. This not only results in low utilization of the box space and reduced system volume density, but also has a large torque that is very easy to cause the box and module to tear and break.

[0004] In the prior art, the Chinese utility model patent with announcement number CN205452396U discloses a battery box with a waterproof structure. Although this patent improves the sealing performance of the battery box, the design strength of the box is low, and the sealing strip still contacts the upper cover and the lower box with the entire large plane, resulting in poor sealing performance.

[0005] Because electric vehicles inevitably experience bumps and wading through water during operation, existing battery packs still have the following problems:

[0006] 1. When an electric vehicle bounces up and down, both the module and the housing are subjected to inertial forces. However, the module and the housing are fixed by setting mounting angles at the bottom of the module. The horizontal height of the fixing point is not on the same plane as the center of gravity of the module, which increases the torque of the lever arm and eventually leads to the tearing and damage of the housing and the module.

[0007] Currently, when modules are installed inside the enclosure, the mounting corners of adjacent modules are installed in a mating manner, which greatly increases the space occupied by the enclosure and is not conducive to improving the system's energy density.

[0008] 2. Currently, most battery boxes are sealed by setting outward flanges on the edges of the top cover and bottom cover of the battery box, adding sealing gaskets between the flanges, and sealing with fasteners. However, the sealing strips are in contact with the entire large flat surface of the top cover and bottom cover, resulting in poor sealing performance. Moreover, the low strength of the sealing parts seriously affects the sealing performance of the battery box.

[0009] To address these issues, we propose a battery box to improve the stability of the battery module installed inside the box, preventing damage from bumps and box tearing. It also increases the space utilization of the box's interior, thereby improving the energy density of the battery module. Furthermore, a double-layer sealing structure enhances the box's sealing performance and avoids the need for openings in the sealing gasket that could compromise the sealing. Summary of the Invention

[0010] The purpose of this invention is to provide a battery box that solves the problems mentioned in the background art, such as the fixed point horizontal height and the module center of gravity not being on the same plane, which increases the torque of the lever arm and ultimately leads to the tearing and damage of the box and the module, increases the space occupied by the box, is not conducive to improving the system energy density, and the sealing strip is in contact with the entire large plane between the upper cover and the lower box, resulting in poor sealing performance and low strength of the sealing parts, which seriously affects the sealing performance of the battery box.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A battery box, comprising:

[0013] The housing has an outer sealing groove and an inner sealing groove on its upper surface. An outer sealing ring is embedded in the outer sealing groove, and an inner sealing ring is provided in the inner sealing groove. A battery bracket is provided in the inner cavity of the housing, and battery modules are symmetrically installed in the battery bracket. Multiple sets of side holes are provided on the inner side of the housing, and a buffer component is installed inside each set of side holes.

[0014] The box cover has a fixing component at the top of its inner cavity, which is located above the battery bracket. A connecting component is located on the outer side of the box cover, and part of the connecting component is located on the outer side of the box body. An outer pressure frame and an inner pressure frame are fixedly connected to the lower surface of the box cover, and the length of the outer pressure frame is greater than the length of the inner pressure frame.

[0015] Preferably, the depth of the inner sealing groove is less than the depth of the outer sealing groove, the height of the outer pressure frame is less than the depth of the outer sealing groove, the depth of the inner sealing groove is greater than the height of the inner pressure frame, and the cross-section of the inner sealing ring is smaller than the cross-section of the outer sealing ring.

[0016] Preferably, a partition is fixedly connected to the bottom of the inner cavity of the box, and multiple sets of through slots are opened on one side of the partition, and the multiple sets of through slots are arranged at equal intervals.

[0017] Preferably, the battery bracket includes an isolation frame, with a support base plate for supporting the battery module fixedly connected to the lower ends of both sides of the isolation frame, and multiple sets of connecting beams for limiting the battery module fixedly connected to both ends of both sides of the isolation frame, with a limiting guard frame fixedly connected to the upper surface of the support base plate away from the isolation frame, and both ends of the limiting guard frame fixedly connected to multiple sets of connecting beams.

[0018] Preferably, the vertical cross-section of the isolation frame is U-shaped, and multiple sets of support blocks are fixedly connected to the inner cavity of the isolation frame. The multiple sets of support blocks are slidably connected to the inside of the through groove, and storage rods are slidably inserted into the upper ends of the other two sides of the isolation frame.

[0019] Preferably, the fixing assembly includes a fixing plate fixedly connected to the top of the inner cavity of the box cover. A bottom groove is formed in the middle of the lower surface of the fixing plate, and multiple sets of telescopic rods are fixedly connected inside the bottom groove. Springs are sleeved on the outer side of each set of telescopic rods. Pressure plates are fixedly connected to the lower ends of each set of telescopic rods. Buffer pads are glued to both ends of the lower surface of the fixing plate.

[0020] Preferably, the lower surface of the pressure plate abuts against the upper surface of the isolation frame, and the lower surfaces of the two sets of buffer pads abut against the upper surfaces of the two sets of battery modules, respectively.

[0021] Preferably, the connecting assembly includes an upper reinforcing block fixedly connected to the outside of the box cover and a lower reinforcing block fixedly connected to the outside of the box body. The vertical cross-sections of the upper reinforcing block and the lower reinforcing block are both trapezoidal. The inclined surface of the upper reinforcing block is provided with a hidden mounting hole, and a connecting bolt is inserted into the hidden mounting hole. The upper surface of the lower reinforcing block is provided with a connecting screw hole for the connecting bolt to be threaded.

[0022] Preferably, the buffer assembly includes a spring sheet, with two sets of insertion holes on the upper side of one side of the spring sheet, and fixing bolts bolted into the side holes are inserted into both sets of insertion holes. The middle part of one side of the spring sheet abuts against the limiting guard frame.

[0023] Preferably, the buffer assembly further includes a limiting block fixedly connected to the lower end of the side hole cavity, and a slider that is slidably connected to the limiting block is fixedly connected to the lower end of the other side of the spring sheet.

[0024] The battery box proposed in this invention has the following advantages compared with the prior art:

[0025] 1. This invention achieves outer layer sealing by embedding an outer pressure frame in an outer sealing groove to press the outer sealing ring, and simultaneously achieves inner layer sealing of the box body and box cover by embedding an inner pressure frame in an inner sealing groove to press the inner sealing ring. Furthermore, the alternating arrangement of the inner and outer, sealing grooves and inner and outer pressure frames improves the overall sealing effect of the battery box.

[0026] 2. The battery bracket and fixing components of the present invention are configured such that the pressure plate abuts against the isolation frame, and the pressure plate presses the isolation frame under the action of the spring, so that the supporting base plate is tightly attached to the bottom of the box, thereby improving the stability of the battery bracket installed in the box. At the same time, the installation of the battery module in the battery bracket reduces the space waste caused by the positioning of the mounting parts, thereby improving the energy density of the battery module and maximizing the utilization of space in the battery box.

[0027] 3. The connecting component and buffer component of the present invention facilitate the limiting of the battery bracket installed inside the box through the buffer component. At the same time, when the battery box is subjected to bumps, the buffer component reduces the impact force, thereby improving the shock resistance of the battery module inside the battery bracket and preventing the battery module from being damaged by vibration. Meanwhile, the connecting component improves the stability of the connection between the box body and the box cover, and improves the overall strength of the battery box. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the lid opening structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0030] Figure 3 This is a schematic diagram of the top structure inside the lid of the present invention;

[0031] Figure 4 This is a schematic diagram of the battery bracket structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the fixed component structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the buffer component structure of the present invention.

[0034] In the diagram: 1. Box body; 2. Box cover; 3. Connecting assembly; 31. Upper reinforcing block; 32. Hidden mounting hole; 33. Connecting bolt; 34. Lower reinforcing block; 35. Connecting screw hole; 4. Partition plate; 5. Battery bracket; 51. Isolation frame; 52. Storage rod; 53. Support base plate; 54. Limiting guard frame; 55. Connecting beam; 6. Battery module; 7. Fixing assembly; 71. Fixing plate; 72. Bottom groove; 73. Telescopic rod; 74. Spring; 75. Pressure plate; 76. Buffer pad; 8. Through groove; 9. Side hole; 10. Buffer assembly; 101. Spring piece; 102. Insertion hole; 103. Fixing bolt; 104. Slider; 105. Limiting block; 11. Outer pressure frame; 12. Inner pressure frame; 13. Outer sealing groove; 14. Inner sealing groove; 15. Outer sealing ring; 16. Inner sealing ring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides, for example Figure 1-6 The battery box shown includes:

[0037] The box body 1 has an outer sealing groove 13 and an inner sealing groove 14 on its upper surface. An outer sealing ring 15 is embedded in the outer sealing groove 13, and an inner sealing ring 16 is provided in the inner sealing groove 14. A battery bracket 5 is provided in the inner cavity of the box body 1. Battery modules 6 are symmetrically installed in the battery bracket 5. Multiple sets of side holes 9 are opened on the inner side of the box body 1, and a buffer component 10 is installed inside each set of side holes 9.

[0038] The box cover 2 has a fixing component 7 at the top of its inner cavity. The fixing component 7 is located above the battery bracket 5. The box cover 2 has a connecting component 3 on its outer side. Part of the connecting component 3 is located on the outer side of the box body 1. The lower surface of the box cover 2 is fixedly connected to an outer pressure frame 11 and an inner pressure frame 12. The length of the outer pressure frame 11 is greater than the length of the inner pressure frame 12.

[0039] The depth of the inner sealing groove 14 is less than the depth of the outer sealing groove 13, the height of the outer pressure frame 11 is less than the depth of the outer sealing groove 13, the depth of the inner sealing groove 14 is greater than the height of the inner pressure frame 12, and the cross-section of the inner sealing ring 16 is smaller than the cross-section of the outer sealing ring 15. The inner sealing groove 14 and the outer sealing groove 13 form a stepped waterproof structure, thereby improving the sealing performance of the box body 1 and the box cover 2 and preventing water from entering the battery box when the vehicle is wading through water.

[0040] A partition 4 is fixedly connected to the bottom of the inner cavity of the housing 1. Multiple through slots 8 are opened on one side of the partition 4, and the multiple through slots 8 are equally spaced. The partition 4 facilitates the support of the battery bracket 5 while ensuring the stability of the battery bracket 5 installation. The through slots 8 facilitate the storage of the support block and improve the stability of the installation.

[0041] The battery bracket 5 includes an isolation frame 51. Support base plates 53 for supporting battery modules 6 are fixedly connected to the lower ends of both sides of the isolation frame 51. Multiple sets of connecting beams 55 for limiting the battery modules 6 are fixedly connected to both ends of both sides of the isolation frame 51. A limiting guard frame 54 is fixedly connected to the end of the upper surface of the support base plate 53 away from the isolation frame 51. Both ends of the limiting guard frame 54 are fixedly connected to multiple sets of connecting beams 55. The installed battery modules 6 are protected by the limiting guard frame 54 and the connecting beams 55, thereby improving the service life of the battery modules 6.

[0042] The vertical cross-section of the isolation frame 51 is U-shaped. Multiple sets of support blocks are fixedly connected to the inner cavity of the isolation frame 51, and the multiple sets of support blocks are slidably connected inside the through groove 8. Storage rods 52 are slidably inserted into the upper ends of the other two sides of the isolation frame 51. The storage rods 52 are easy to pull out, which makes it easy to put and take out the battery bracket 5, so as to facilitate the disassembly and assembly of the battery module 6 and facilitate subsequent disassembly and maintenance.

[0043] The fixing assembly 7 includes a fixing plate 71 fixedly connected to the top of the inner cavity of the cover 2. A bottom groove 72 is formed in the middle of the lower surface of the fixing plate 71, and multiple sets of telescopic rods 73 are fixedly connected inside the bottom groove 72. Springs 74 are sleeved on the outer side of each set of telescopic rods 73. A pressure plate 75 is fixedly connected to the lower end of each set of telescopic rods 73. Buffer pads 76 are glued to both ends of the lower surface of the fixing plate 71. The pressure plate 75 presses the isolation frame 51 tightly, thereby preventing the battery bracket 5 from shaking when the vehicle bounces up and down, and improving the stability of the battery module 6 installation.

[0044] The lower surface of the pressure plate 75 abuts against the upper surface of the isolation frame 51, and the lower surfaces of the two sets of buffer pads 76 abut against the upper surfaces of the two sets of battery modules 6 respectively. The buffer pads 76 improve the stability of the battery module 6 installation and prevent the battery module 6 from contacting the box cover 2, thereby preventing damage to the battery module 6.

[0045] The connecting component 3 includes an upper reinforcing block 31 fixedly connected to the outside of the cover 2 and a lower reinforcing block 34 fixedly connected to the outside of the housing 1. The vertical cross-sections of the upper reinforcing block 31 and the lower reinforcing block 34 are both trapezoidal. The inclined surface of the upper reinforcing block 31 is provided with a hidden mounting hole 32, and a connecting bolt 33 is inserted into the hidden mounting hole 32. The upper surface of the lower reinforcing block 34 is provided with a connecting screw hole 35 for the connecting bolt 33 to be threaded. The strength of the cover 2 is improved by the upper reinforcing block 31, and the strength of the housing 1 is improved by the lower reinforcing block 34, thereby avoiding the overall impact damage to the battery box and improving the protection effect on the battery module 6.

[0046] The buffer assembly 10 includes a spring piece 101. Two sets of insertion holes 102 are provided on the upper end of one side of the spring piece 101, and a fixing bolt 103 is inserted into each of the two sets of insertion holes 102 and bolted into the side hole 9. The middle part of one side of the spring piece 101 abuts against the limiting guard frame 54. The spring piece 101 facilitates clamping the battery bracket 5 during installation and guides the installation position of the battery bracket 5 during installation, thereby improving the efficiency of battery bracket 5 installation.

[0047] The buffer assembly 10 also includes a limiting block 105 fixedly connected to the lower end of the inner cavity of the side hole 9. The other lower end of the spring piece 101 is fixedly connected to a slider 104 that is slidably connected to the limiting block 105. By sliding the slider 104 and the limiting block 105, the spring piece 101 can be bent, thereby facilitating the clamping of the battery bracket 5.

[0048] In use, the battery module 6 is installed inside the battery bracket 5, and then the battery bracket 5 is placed inside the housing 1 by the storage rod 52. When placed, the support base plate 53 of the battery bracket 5 abuts against the spring piece 101 of the buffer assembly 10. The battery bracket 5 increases the space for the battery module 6 to be installed, thereby increasing the energy density of the battery module 6. The elastic potential energy of the spring piece 101 clamps the battery bracket 5, improving the stability of the battery bracket 5 installation. When the housing cover 2 is closed, the outer pressure frame 11 and the inner pressure frame 12 correspond to the outer sealing groove 13 and the inner sealing groove 14, so that the outer pressure frame 11 and the inner pressure frame 12 abut against the outer sealing ring 15 and the inner sealing ring 16 respectively. Then, the lower end of the connecting bolt 33 is screwed into the connecting screw hole 35, so that the housing cover 2 and the housing 1 are tightly fitted, and the outer pressure frame 11 and the inner pressure frame 12 are interference-fitted with the outer sealing ring 15 and the inner sealing ring 16, thus forming a stepped sealing structure, which improves the sealing effect of the battery box.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery box, characterized in that, include: The box (1) has an outer sealing groove (13) and an inner sealing groove (14) on its upper surface. An outer sealing ring (15) is embedded in the outer sealing groove (13), and an inner sealing ring (16) is provided in the inner sealing groove (14). A battery bracket (5) is provided in the inner cavity of the box (1), and battery modules (6) are symmetrically installed in the battery bracket (5). Multiple sets of side holes (9) are opened on the inner side of the box (1), and a buffer component (10) is installed inside each set of side holes (9). The box cover (2) has a fixing component (7) at the top of its inner cavity. The fixing component (7) is located above the battery bracket (5). The box cover (2) has a connecting component (3) on its outer side. Part of the connecting component (3) is located on the outer side of the box body (1). The lower surface of the box cover (2) is fixedly connected with an outer pressure frame (11) and an inner pressure frame (12). The length of the outer pressure frame (11) is greater than the length of the inner pressure frame (12). The battery holder (5) includes an isolation frame (51); The fixing component (7) includes a fixing plate (71) fixedly connected to the top of the inner cavity of the box cover (2). A bottom groove (72) is provided in the middle of the lower surface of the fixing plate (71), and multiple sets of telescopic rods (73) are fixedly connected inside the bottom groove (72). Springs (74) are sleeved on the outer side of the multiple sets of telescopic rods (73). A pressure plate (75) is fixedly connected to the lower end of the multiple sets of telescopic rods (73). Buffer pads (76) are glued to both ends of the lower surface of the fixing plate (71). The lower surface of the pressure plate (75) abuts against the upper surface of the isolation frame (51), and the lower surfaces of the two sets of buffer pads (76) abut against the upper surfaces of the two sets of battery modules (6) respectively.

2. The battery box according to claim 1, characterized in that: The depth of the inner sealing groove (14) is less than the depth of the outer sealing groove (13), the height of the outer pressure frame (11) is less than the depth of the outer sealing groove (13), the depth of the inner sealing groove (14) is greater than the height of the inner pressure frame (12), and the cross-section of the inner sealing ring (16) is smaller than the cross-section of the outer sealing ring (15).

3. A battery box according to claim 2, characterized in that: The bottom of the inner cavity of the box (1) is fixedly connected to a partition (4), and multiple sets of through slots (8) are opened on one side of the partition (4), and the multiple sets of through slots (8) are arranged at equal intervals.

4. A battery box according to claim 3, characterized in that: The lower ends of both sides of the isolation frame (51) are fixedly connected to a support base plate (53) for supporting the battery module (6). Both ends of both sides of the isolation frame (51) are fixedly connected to multiple sets of connecting beams (55) for limiting the battery module (6). The upper surface of the support base plate (53) away from the isolation frame (51) is fixedly connected to a limiting guard frame (54). Both ends of the limiting guard frame (54) are fixedly connected to multiple sets of connecting beams (55).

5. A battery box according to claim 4, characterized in that: The vertical cross section of the isolation frame (51) is U-shaped. Multiple sets of support blocks are fixedly connected to the inner cavity of the isolation frame (51), and the multiple sets of support blocks are slidably connected inside the through groove (8). Storage rods (52) are slidably inserted into the upper ends of the other two sides of the isolation frame (51).

6. A battery box according to claim 1, characterized in that: The connecting assembly (3) includes an upper reinforcing block (31) fixedly connected to the outside of the cover (2) and a lower reinforcing block (34) fixedly connected to the outside of the box body (1). The vertical cross-section of the upper reinforcing block (31) and the vertical cross-section of the lower reinforcing block (34) are both trapezoidal. The inclined surface of the upper reinforcing block (31) is provided with a hidden mounting hole (32). A connecting bolt (33) is inserted into the hidden mounting hole (32). The upper surface of the lower reinforcing block (34) is provided with a connecting screw hole (35) for the connecting bolt (33) to be threaded.

7. A battery box according to claim 6, characterized in that: The buffer assembly (10) includes a spring sheet (101). Two sets of insertion holes (102) are provided on the upper side of one side of the spring sheet (101), and a fixing bolt (103) is inserted into each of the two sets of insertion holes (102) and bolted into the side hole (9). The middle part of one side of the spring sheet (101) abuts against the limiting guard frame (54).

8. A battery box according to claim 7, characterized in that: The buffer assembly (10) also includes a limiting block (105) fixedly connected to the lower end of the inner cavity of the side hole (9), and a slider (104) fixedly connected to the lower end of the other side of the spring sheet (101) and slidably connected to the limiting block (105).

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