Battery case

Abstract

The embodiment of the utility model discloses a battery case which comprises a case body, a battery pack and a pressing plate, and a battery pack inlet / outlet is formed in the top surface of the case body; limiting columns are arranged on the inner side wall of the box body, inclined faces are arranged at the ends, facing the battery pack inlet and outlet, of the limiting columns and guide the battery packs into the box body, the battery packs are convenient to assemble and replace, and the production efficiency is improved. When the battery pack is located in the box body, the battery pack abuts against the limiting column. The pressing plate is detachably connected to the box body, and the battery pack is fixed in the box body, so that parts required for fixing are reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery case assembly, in particular to a battery case. Background Art

[0002] In order to prevent the battery pack from shaking and being damaged in the battery case, the battery case in the prior art is usually designed with a complex fixing structure. However, the battery case in the prior art has many components, is complicated to assemble, and has a high production cost. Utility Model Content

[0003] In order to further reduce the production cost of the battery chassis, an embodiment of the present application provides a battery chassis to solve the above problems.

[0004] The utility model provides a battery case, comprising a case body, a battery pack and a pressure plate, wherein the top surface of the case body is provided with a battery pack entrance and exit; the inner side wall of the case body is provided with a limiting column, and the limiting column is provided with an inclined surface at one end facing the battery pack entrance and exit, and the inclined surface guides the battery pack into the case body, and when the battery pack is located in the case body, the battery pack abuts against the limiting column; the pressure plate is detachably connected to the case body and fixes the battery pack in the case body.

[0005] In some embodiments, the limiting column includes a mounting surface and an abutting surface, the mounting surface is parallel to the bottom surface of the box, the abutting surface is parallel to the side wall of the box, one end of the inclined surface is connected to the mounting surface at an angle, and the other end of the inclined surface is connected to the abutting surface at an angle, the angle between the inclined surface and the mounting surface is greater than 90°, and when the battery pack is located in the box, the battery pack abuts against the abutting surface.

[0006] In some embodiments, at least two limiting columns are provided on the inner side wall of the box body, the mounting surfaces of the at least two limiting columns have the same height, the inclined surfaces of the at least two limiting columns have the same inclination relative to the mounting surface, and the inclined surfaces of the at least two limiting columns can be connected after extending along their inclined direction.

[0007] In some embodiments, the box body is a square box body, and each of the four inner side walls of the box body is provided with at least one limiting column, and the limiting columns are arranged at intervals.

[0008] In some embodiments, the limiting column includes two first limiting columns and at least two second limiting columns, and the two opposite inner side walls of the box body are respectively provided with one first limiting column, and the other two opposite inner side walls of the box body are respectively provided with at least one second limiting column; the battery pack includes a battery and two terminal blocks, and the two terminal blocks are respectively connected to the two ends of the battery; the first limiting column abuts against the battery, and the second limiting column abuts against the terminal block.

[0009] In some embodiments, the contact area between the battery pack and a single first limiting post is greater than the contact area between the battery pack and a single second limiting post.

[0010] In some embodiments, the pressing plate is parallel to the bottom surface of the box body, one end of the pressing plate is connected to one of the first limiting columns, and the other end of the pressing plate is connected to another of the first limiting columns.

[0011] In some embodiments, an arched protrusion is provided on the pressing plate.

[0012] In some embodiments, buffer members are provided between the battery pack and the box, and between the battery pack and the pressure plate.

[0013] In some embodiments, the buffer member between the battery pack and the box only covers the contact surface between the battery pack and the limiting pillar.

[0014] In summary, the present invention provides a battery case comprising a housing, a battery pack, and a pressure plate. A retaining post is provided within the housing, which, combined with a detachably connected pressure plate, secures the battery pack within the housing, reducing the number of components required for fixation and lowering production costs. The retaining post also features an inclined surface that smoothly guides the battery pack into the housing, facilitating assembly and replacement, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0016] Figure 1 This is an exploded view of the structure of the battery case provided by an embodiment of the present utility model;

[0017] Figure 2 This is a schematic structural diagram of a battery case provided by an embodiment of the present utility model;

[0018] Figure 3 This is a schematic structural diagram of a battery box body from a first perspective provided by an embodiment of the present utility model;

[0019] Figure 4This is a schematic structural diagram of the battery box provided by an embodiment of the present invention from a second perspective;

[0020] Figure 5 This is a schematic structural diagram of a battery pack of a battery box provided by an embodiment of the present utility model;

[0021] Figure 6 It is a structural schematic diagram of a pressure plate of a battery case provided by an embodiment of the present utility model.

[0022] Description of reference numerals:

[0023] 1-Battery chassis;

[0024] 2- box;

[0025] 21-battery pack entrance and exit;

[0026] 22-limiting column;

[0027] 221-mounting surface;

[0028] 222- inclined surface;

[0029] 223- abutment surface;

[0030] 224-first limiting column;

[0031] 225-second limiting column;

[0032] 3-Battery pack;

[0033] 31-connection board;

[0034] 32-battery;

[0035] 33- positioning piece;

[0036] 4-pressing plate;

[0037] 41-arched convexity;

[0038] 42-gap;

[0039] 5- buffer;

[0040] 51-epoxy board;

[0041] 52-EVA cotton;

[0042] 6- Reserve space;

[0043] X-left and right direction of the battery chassis;

[0044] Y-front and rear direction of the battery chassis;

[0045] Z - height direction of the battery chassis. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0047] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0048] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0049] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0050] For the convenience of description, we define Figure 1 The front and rear direction of the battery box 1 is the Y-axis direction, and the definition Figure 1 The left and right directions of the battery box 1 are the X-axis directions, and the definition is Figure 1 The height direction of the battery box 1 shown is the Z-axis direction. The directional terms such as "top", "bottom", "left", "right", "front" and "back" mentioned in the description of the battery box 1 in the embodiment of the application are based on the drawings in the specification. Figure 1 The description of the directions shown uses the positive direction of the Z axis as the "top", the negative direction of the Z axis as the "bottom", the negative direction of the X axis as the "left", the positive direction of the X axis as the "right", the positive direction of the Y axis as the "front", and the negative direction of the Y axis as the "back", which does not constitute a limitation on the actual application scenario of the battery chassis 1.

[0051] See also Figures 1 to 4 , Figure 1 This is an exploded view of the structure of the battery box 1 provided in the embodiment of the utility model. Figure 2It is a structural schematic diagram of the battery case 1 provided by an embodiment of the present invention. The present invention provides a battery case 1 including a case body 2, a battery pack 3 and a pressure plate 4. The top surface of the case body 2 is provided with a battery pack inlet and outlet 21. The battery pack 3 and the pressure plate 4 are placed into the case body 2 from the battery pack inlet and outlet 21 in sequence. A limiting column 22 is provided on the inner side wall of the case body 2. The limiting column 22 is provided with an inclined surface 222 at one end facing the battery pack inlet and outlet 21. The inclined surface 222 guides the battery pack 3 into the case body 2. On the one hand, it makes the assembly of the battery pack 3 faster and further improves production efficiency; on the other hand, it avoids the battery pack 3 from being damaged by collisions when it is placed in and out of the case body 2. When the battery pack 3 is located in the case body 2, the battery pack 3 abuts against the limiting column 22, and the pressure plate 4 is detachably connected to the case body 2 and fixes the battery pack 3 in the case body 2. That is, after the battery pack 3 enters the case 2 along the inclined surfaces 222 of the limiting posts 22, it becomes lodged between the limiting posts 22. The pressing plate 4 then presses the battery pack 3 against the bottom surface of the case 2 from the top, thereby securing the battery pack 3 within the case 2. On the one hand, the cooperation between the pressing plate 4 and the limiting posts 22 to secure the battery pack 3 simplifies the number of components used to secure the battery pack 3 within the battery case 1 and reduces production costs. On the other hand, the pressing plate 4 is detachably connected to the case 2, making it easier to install and remove the battery pack 3.

[0052] See also Figures 2 to 4 , Figure 3 This is a schematic structural diagram of the box body 2 of the battery box 1 provided by an embodiment of the present invention from a first perspective. Figure 4 This is a schematic diagram of the structure of the housing 2 of the battery case 1 provided by an embodiment of the present invention from a second perspective. In some embodiments, the limiting post 22 includes a mounting surface 221 and an abutment surface 223. The mounting surface 221 is parallel to the bottom surface of the housing 2, and the abutment surface 223 is parallel to the side wall of the housing 2. One end of the inclined surface 222 is connected to the mounting surface 221 at an angle, and the other end of the inclined surface 222 is connected to the abutment surface 223 at an angle. The angle between the inclined surface 222 and the mounting surface 221 is greater than 90°. When the battery pack 3 is located in the housing 2, the battery pack 3 abuts the abutment surface 223. Specifically, the inclined surfaces 222 of all the limiting columns 22 in the box body 2 generally show a tendency to converge from the periphery of the top of the box body 2 to the center of the bottom of the box body 2. The battery pack 3 can enter the box body 2 from the battery pack entrance and exit 21 of the box body 2 along the inclined surfaces 222 of the limiting columns 22. Then, the battery pack 3 can be inserted between the limiting columns 22 and close to the bottom surface of the box body 2 along the transition from the inclined surface 222 to the abutment surface 223, thereby realizing smooth assembly of the battery pack 3.

[0053] In some embodiments, at least two limiting columns 22 are provided on the inner side wall of the box body 2, and the heights of the mounting surfaces 221 of the at least two limiting columns 22 are the same, and the inclinations of the inclined surfaces 222 of the at least two limiting columns 22 relative to the mounting surface 221 are the same, and thus the inclined surfaces 222 of the at least two limiting columns 22 can be connected after each extending along its inclined direction, so that the inclined surfaces 222 of all the limiting columns 22 in the box body 2 tend to converge from the periphery of the top of the box body 2 to the center of the bottom of the box body 2 as a whole, thereby achieving the effect of helping the battery pack 3 to be smoothly assembled.

[0054] In some embodiments, the housing 2 is a square housing 2, and each of the four inner sidewalls of the housing 2 is provided with at least one limiting post 22. The limiting posts 22 on the four inner sidewalls can clamp the battery pack 3 within the housing 2 from the front, rear, left, and right directions. The limiting posts 22 are arranged at intervals, and the space between the limiting posts 22 can accommodate the wiring within the battery case 1 and increase the heat dissipation space within the housing 2.

[0055] In some embodiments, the limiting posts 22 include two first limiting posts 224 and at least two second limiting posts 225. Two opposing inner walls of the box body 2 are each provided with a first limiting post 224, and the other two opposing inner walls of the box body 2 are each provided with at least one second limiting post 225. In this embodiment, the limiting posts 22 include two first limiting posts 224 and four second limiting posts 225. Each of the left and right inner walls of the box body 2 is provided with a first limiting post 224, and each of the front and rear inner walls of the box body 2 is provided with two second limiting posts 225. In other embodiments, each of the left and right inner walls of the box body 2 may be provided with a second limiting post 225, and each of the front and rear inner walls of the box body 2 may be provided with a first limiting post 224; or each of the left and right inner walls of the box body 2 may be provided with a first limiting post 224, the front inner wall of the box body 2 may be provided with a second limiting post 225, and the rear inner wall of the box body 2 may be provided with three second limiting posts 225, etc.

[0056] See also Figures 2 to 5 , Figure 5: This is a schematic diagram of the structure of the battery pack 3 of the battery case 1 provided by an embodiment of the present invention. In some embodiments, the battery pack 3 includes a battery 32 and two terminal blocks 31, and the two terminal blocks 31 are respectively connected to the two ends of the battery 32; the first limiting post 224 abuts against the battery 32, and the second limiting post 225 abuts against the terminal blocks 31. In this embodiment, the two first limiting posts 224 abut against the battery 32 from the left and right sides, and the second limiting posts 225 abut against the terminal blocks 31 from the front and back sides, respectively. As a result, the limiting posts 22 on the four inner side walls can clamp the battery pack 3 in the box body 2 from the front, back, left, and right directions respectively. The two first limiting posts 224 abut against the battery 32 from both sides to fix the battery pack 3, which can minimize the pressure on the waist of the battery 32 and thus reduce damage to the battery 32. Multiple second limiting posts 225 abut against the terminal board 31 from both sides to fix the battery pack 3. On the one hand, the gaps between the multiple second limiting posts 225 can increase the heat dissipation space inside the box 2; on the other hand, the multiple second limiting posts 225 can fix the battery pack 3 at multiple points, thereby enhancing the stability of the battery pack 3 fixed in the box 2.

[0057] In some embodiments, the contact area between the battery pack 3 and a single first limiting post 224 is greater than the contact area between the battery pack 3 and a single second limiting post 225. Because the first limiting post 224 abuts the waist of the battery 32, if the contact area between the first limiting post 224 and the battery 32 is too small, the first limiting post 224 exerts a greater pressure on the battery 32, which can easily damage the battery 32. The second limiting post 225, on the other hand, abuts the terminal block 31, distributing the pressure applied by the second limiting post 225 to the terminal block 31. Reducing the size of the second limiting post 225 can, on the one hand, reduce material and cost; on the other hand, it can increase the remaining space within the housing 2 to improve heat dissipation or accommodate other components.

[0058] In some embodiments, the two first limiting posts 224 have different dimensions to clearly define the orientation of the battery pack 3 when placed in the case 2, preventing the battery pack 3 from being placed upside down during assembly and affecting subsequent use. In this embodiment, the length of the first limiting post 224 on the left inner wall of the case 2 in the y-axis direction is greater than the length of the first limiting post 224 on the right inner wall of the case 2 in the y-axis direction. Consequently, the gap between the first limiting post 224 on the left inner wall of the case 2 and the case 2 is smaller than the gap between the first limiting post 224 on the right inner wall of the case 2 and the case 2. A positioning member 33 is provided at one corner of the battery pack 3. The size of the positioning member 33 is just large enough to fit within the gap between the first limiting post 224 on the right inner wall of the box 2 and the box 2, and is larger than the gap between the first limiting post 224 on the left inner wall of the box 2 and the box 2. This ensures that when the battery pack 3 is placed into the box 2, the positioning member 33 of the battery pack 3 must fit within the gap between the first limiting post 224 on the right inner wall of the box 2 and the box 2, thereby determining the left and right orientation of the battery pack 3. In other embodiments, the outer surface of the battery pack 3 may be provided with different markers, and the surfaces of different limiting posts 22 may be provided with different trajectories to match the different markers on the outer surface of the battery pack 3, thereby defining the orientation of the battery pack 3 within the box 2.

[0059] See also Figure 1 、 Figure 2 and Figure 5 In some embodiments, the battery pack 3 comprises a plurality of batteries 32 stacked in an L-shape, with a reserved space 6 formed between the battery pack 3 and the housing 2 for accommodating other components such as circuit terminals and heat sinks. The L-shaped opening of the battery pack 3 faces the battery pack access port 21 of the housing 2, and the long side of the L-shape of the battery pack 3 abuts the bottom surface of the housing 2, making the battery pack 3 more stable within the housing 2 and preventing other components in the reserved space 6 from being squeezed. In other embodiments, the battery pack 3 may comprise a plurality of batteries 32 stacked in other shapes, such as convex, concave, or square.

[0060] See also Figure 1 、 Figure 2 and Figure 6 , Figure 6Schematic diagram of the structure of the pressure plate of the battery case provided by an embodiment of the present invention. In some embodiments, the pressure plate 4 is parallel to the bottom surface of the case 2, one end of the pressure plate 4 is connected to a first limiting post 224, and the other end of the pressure plate 4 is connected to another first limiting post 224. The pressure plate 4 and the first limiting post 224 are bolted together, so that the pressure plate 4 can buckle and fix the battery pack 3 in the case 2, and the pressure plate 4 is easy to assemble and disassemble. In this embodiment, the first limiting post 224 is completely located in the case 2, and after the pressure plate 4 is bolted to the first limiting post 224, the pressure plate 4 can also be completely accommodated in the case 2, so that the bottom surface of the pressure plate 4 can buckle and fix the battery pack 3 to the bottom surface of the case 2, and the top surface of the pressure plate 4 can also support other components of the battery case 1. In other embodiments, the pressure plate 4 can also be directly connected to the outer wall of the case 2 to serve as the top cover of the battery case 1.

[0061] In some embodiments, the pressing plate 4 is provided with an arched protrusion 41, which further enhances the strength of the pressing plate 4 and improves the ability of the pressing plate 4 to fix the battery pack 3. The cross-section of the arched protrusion 41 can be trapezoidal, semicircular, or arched bridge-shaped, and the number of arched protrusions 41 can be one or more.

[0062] In some embodiments, a notch 42 is provided on the edge of the pressure plate 4. When the bottom surface of the pressure plate 4 abuts against the battery pack 3 and the top surface of the pressure plate 4 supports other components of the battery chassis 1, the lines between the battery pack 3 and other components can be connected through the notch 42.

[0063] See also Figure 1 Buffers 5 are provided between the battery pack 3 and the housing 2, and between the battery pack 3 and the pressure plate 4. These buffers 5 can be made of sponge, foam, fiber, or other materials. In this embodiment, the outer surface of the battery pack 3 in contact with the housing 2 is provided with EVA (ethylene-vinyl acetate copolymer) cotton 52 and an epoxy plate 51 as buffers 5. The elasticity of the EVA cotton 52 improves the structural tolerance of the battery case 1. Even if the battery pack 3's dimensions deviate from the pre-designed design, the compression and expansion of the EVA cotton 52 can constrain the battery pack 3 within the housing 2. The outer surface of the EVA cotton 52 is affixed to the epoxy plate 51. The smooth surface of the epoxy plate 51 reduces friction between the battery pack 3 and the housing 2, making the insertion of the battery pack 3 into the housing 2 smoother. In this embodiment, EVA cotton 52 is also provided between the top surface of the battery pack 3 and the pressure plate 4. The EVA cotton 52 provides insulation and provides expansion buffering between the pressure plate 4 and the battery pack 3.

[0064] Furthermore, the buffer member 5 between the battery pack 3 and the chassis 2 only covers the contact surface between the battery pack 3 and the retaining post 22. That is, except for the contact between the battery pack 3 and the pressure plate 4, the buffer member 5 is not provided at any location where the battery pack 3 does not contact the retaining post 22. Furthermore, except for the contact between the battery pack 3 and the pressure plate 4, the locations where the battery pack 3 does not contact the retaining post 22 are directly exposed to the air. This ensures that the battery pack 3 is buffered and the battery chassis 1 is structurally fault-tolerant while minimizing the use of the buffer member 5, reducing costs and further improving the heat dissipation performance of the battery chassis 1.

[0065] The above correspondence is not limited to one in actual application. Users can choose to use one or more of them in combination to enhance personalized experience.

[0066] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention.

Claims

1. A battery case, characterized in that: The utility model comprises a box body, a battery pack and a pressure plate, wherein the top surface of the box body is provided with a battery pack entrance and exit; the inner side wall of the box body is provided with a limiting column, and the limiting column is provided with an inclined surface at one end facing the battery pack entrance and exit, and the inclined surface guides the battery pack into the box body. When the battery pack is located in the box body, the battery pack abuts against the limiting column; the pressure plate is detachably connected to the box body and fixes the battery pack in the box body.

2. The battery case according to claim 1, characterized in that: The limiting column includes a mounting surface and an abutting surface, the mounting surface is parallel to the bottom surface of the box, the abutting surface is parallel to the side wall of the box, one end of the inclined surface is connected to the mounting surface at an angle, and the other end of the inclined surface is connected to the abutting surface at an angle, the angle between the inclined surface and the mounting surface is greater than 90°, and when the battery pack is located in the box, the battery pack abuts against the abutting surface.

3. The battery case according to claim 2, characterized in that: At least two limiting columns are provided on the inner side wall of the box body, the mounting surfaces of the at least two limiting columns have the same height, the inclined surfaces of the at least two limiting columns have the same inclination relative to the mounting surface, and the inclined surfaces of the at least two limiting columns can be connected after extending along their inclined direction.

4. The battery case according to claim 1, wherein: The box body is a square box body, and each of the four inner side walls of the box body is provided with at least one limiting column, and the limiting columns are arranged at intervals.

5. The battery case according to claim 4, characterized in that: The limiting column includes two first limiting columns and at least two second limiting columns, and the two opposite inner walls of the box are respectively provided with one first limiting column, and the other two opposite inner walls of the box are respectively provided with at least one second limiting column; the battery pack includes batteries and two terminal blocks, and the two terminal blocks are respectively connected to the two ends of the battery; the first limiting column abuts against the battery, and the second limiting column abuts against the terminal block.

6. The battery case according to claim 5, characterized in that: The contact area between the battery pack and a single first limiting post is greater than the contact area between the battery pack and a single second limiting post.

7. The battery case according to claim 5, characterized in that: The pressing plate is parallel to the bottom surface of the box body, one end of the pressing plate is connected to one of the first limiting columns, and the other end of the pressing plate is connected to another of the first limiting columns.

8. The battery case according to claim 1, characterized in that: The pressing plate is provided with an arched protrusion.

9. The battery case according to claim 1, characterized in that: Buffers are provided between the battery pack and the box body, and between the battery pack and the pressure plate.

10. The battery case according to claim 7, characterized in that: The buffer member between the battery pack and the box body only covers the contact surface between the battery pack and the limiting column.

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