Lightweight battery box

Abstract

The utility model provides a light-weight battery box which comprises a shell and a cover body, the cover body is connected to the shell in an openable and closable mode, the lower end of the cover body is connected with a positive electrode current collecting piece and a negative electrode current collecting piece, the positive electrode current collecting piece is suitable for abutting against the positive electrodes of all batteries in the shell, and the negative electrode current collecting piece is suitable for abutting against the negative electrodes of all the batteries in the shell. A positive pole and a negative pole are arranged at the upper end of the cover body, the shell and the cover body are both made of a composite layered structure, and the composite layered structure comprises a first fiber fabric layer, a first structural adhesive layer, a steel plate layer, a second structural adhesive layer and a second fiber fabric layer which are sequentially connected from inside to outside. According to the utility model, the weight of the whole battery box is reduced on the premise of ensuring the strength, the bonding effect of the composite layered structure can be effectively improved, and the composite layered structure does not fall off in the cutting process. According to the utility model, a plurality of batteries can be placed in the battery box, and only the faulted batteries can be replaced or maintained when the batteries need to be maintained, so that the maintenance cost of the batteries can be reduced.

Description

Technical Field

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

[0002] Lightweighting is an important direction for the current development of automobiles and an important means of energy conservation. As the main driving energy source for power devices such as new energy vehicles, battery boxes play an irreplaceable role. The shell of traditional battery boxes is often made of all-metal material, resulting in heavy weight. In addition, a whole battery is usually placed in the existing battery box. When a battery fails, the whole battery needs to be replaced, which increases the maintenance cost. Summary of the invention

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model provides a lightweight battery box, which reduces the weight of the battery box while ensuring the strength, and can reduce the subsequent battery maintenance cost.

[0004] The utility model embodiment proposes a lightweight battery box, comprising: a shell and a cover body, the shell having an outer shell and a cavity for installing a battery surrounded by the outer shell, the upper end of the outer shell having an upper opening; the cover body can be opened and closed and connected to the upper opening at the upper end of the outer shell, the lower end of the cover body is connected with a positive current collecting sheet and a negative current collecting sheet, the positive current collecting sheet and the negative current collecting sheet are both strip-shaped and arranged in parallel, the positive current collecting sheet is suitable for abutting the positive electrodes of all the batteries in the shell, and the negative current collecting sheet is suitable for abutting the negative electrodes of all the batteries in the shell, the upper end of the cover body is provided with a positive electrode column and a negative electrode column, the positive electrode column is electrically connected to the positive electrode collecting sheet, and the negative electrode column is electrically connected to the negative electrode collecting sheet, the materials of the outer shell and the cover body are both composite layered structures, the composite layered structure includes a first fiber fabric layer, a first structural adhesive layer, a steel plate layer, a second structural adhesive layer and a second fiber fabric layer connected in sequence from the inside to the outside.

[0005] In some embodiments, a plurality of partitions are provided at the bottom of the housing to separate batteries placed side by side.

[0006] In some embodiments, the height of the partition is 1 / 10 to 1 / 5 of the height of the cavity.

[0007] In some embodiments, the partition is slidably connected to the bottom of the housing.

[0008] In some embodiments, strip-shaped sliding holes are respectively opened on both sides of the bottom of the shell, a slider is connected to the lower part of the partition, the partition is slidably connected to the sliding hole through the slider, and the slider is clamped under the sliding hole.

[0009] In some embodiments, a lining plate is fixedly connected to the lower portion of the shell, and the bottom of the shell has a lower opening, the lower opening of the shell is detachably connected to the bottom plate, the lining plate is located above the bottom plate, the lining plate and the bottom plate are parallel to each other, a gap is formed between the lining plate and the bottom plate, a sliding hole is opened on the lining plate, and the bottom plate supports the sliding of the slider.

[0010] In some embodiments, a plurality of support beams are connected in the gap between the lining plate and the bottom plate, and the support beams are located between the two sliding holes.

[0011] In some embodiments, the cover is connected to the shell via a first seal, and the bottom plate is connected to the shell via a second seal.

[0012] In some embodiments, the first sealing member is a first sealing ring connected to the lower edge of the cover body, and the cover body and the shell are snap-fitted to each other and sealed by the first sealing ring.

[0013] In some embodiments, the second sealing member is a second sealing ring connected to the upper edge of the bottom plate, and the bottom plate and the shell are connected by bolts and then sealed by the second sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0015] in:

[0016] Figure 1 This is a schematic diagram of the internal structure of a lightweight battery box in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A top view of the cover body;

[0018] Figure 3 for Figure 1 A bottom view of the cover body;

[0019] Figure 4 for Figure 1 A top view of the shell in FIG.

[0020] Figure 5 It is a schematic diagram of the structure of the composite layered structure;

[0021] Reference numerals:

[0022] 1-positive electrode column; 2-positive electrode current collector; 3-cover; 4-shell; 5-partition; 6-liner; 7-slider; 8-bottom plate; 9-negative electrode column; 10-negative electrode current collector; 11-first fiber fabric layer; 12-first structural adhesive layer; 13-steel plate layer; 14-second structural adhesive layer; 15-second fiber fabric layer; 16-sliding hole. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0024] The lightweight battery box of an embodiment of the utility model is described below with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, the embodiment of the utility model proposes a lightweight battery box, including: a shell 4 and a cover 3, the shell 4 has an outer shell and a cavity surrounded by the outer shell for installing a battery, and the upper end of the outer shell has an upper opening; the cover 3 can be opened and closed and connected to the upper opening of the upper end of the outer shell, and the lower end of the cover 3 is connected to a positive current collector 2 and a negative current collector 10, the positive current collector 2 and the negative current collector 10 are both strip-shaped and arranged in parallel, and the positive current collector 2 is suitable for abutting against all the batteries in the shell 4. The positive and negative current collectors 10 are suitable for abutting against the negative electrodes of all the batteries in the shell 4. The upper end of the cover 3 is provided with a positive electrode column 1 and a negative electrode column 9. The positive electrode column 1 is electrically connected to the positive current collector 2, and the negative electrode column 9 is electrically connected to the negative current collector 10. The material of the shell and the cover 3 are both composite layer structures, and the composite layer structure includes a first fiber fabric layer 11, a first structural adhesive layer 12, a steel plate layer 13, a second structural adhesive layer 14 and a second fiber fabric layer 15 connected in sequence from the inside to the outside.

[0026] The embodiment of the utility model configures the outer shell and the cover body 3 to be a composite layered structure including a first fiber fabric layer 11, a first structural adhesive layer 12, a steel plate layer 13, a second structural adhesive layer 14 and a second fiber fabric layer 15, so that the weight of the overall battery box is reduced while ensuring the strength, and the bonding effect of the composite layered structure can be effectively improved, and the composite layered structure will not fall off during the cutting process.

[0027] By connecting the positive electrode current collector 2 and the negative electrode current collector 10 at the lower end of the cover 3, multiple batteries can be placed in the battery box, and all batteries are connected in series through the current collectors. When maintenance is required, only the faulty battery can be replaced or repaired, which can reduce the battery maintenance cost.

[0028] Furthermore, the composite layered structure is prepared by a wet molding process. The specific preparation process includes:

[0029] (1) Cut steel plates or other sandwich materials according to the dimensions of the battery box product drawing, and cut fiber fabrics according to the drawing;

[0030] (2) placing the first fiber fabric layer 11, the first structural adhesive layer 12, the steel plate layer 13, the second structural adhesive layer 14 and the second fiber fabric layer 15 of the battery box cover in sequence into the preforming mold to perform preforming of the battery box;

[0031] (3) Place the preform in the mold, close the mold, and inject the resin. The mold temperature is 70-180°C and the vacuum degree is not greater than -0.085MPa;

[0032] (4) After the injection is completed, the mold is heated for 3 to 5 minutes and the mold is opened for demoulding;

[0033] (5) Cut off the waste edges of the product and complete the production process.

[0034] It should be noted that the traditional molding process is a composite integrated molding through high-pressure resin infusion. After adding a steel plate sandwich structure, the adhesion is very low, and it cannot be better attached to the surface of the fiber layer and is very easy to fall off. However, the composite layered structure prepared by the wet molding process in the embodiment of the utility model has a higher composite degree of the product, and the product does not fall off after cutting.

[0035] In some embodiments, a plurality of partitions 5 are provided at the bottom of the housing 4 to separate the batteries placed side by side and to leave space between the batteries for heat dissipation.

[0036] Furthermore, a water cooling circulation layer may be provided on the housing 4. The water cooling circulation layer may be provided inside the steel plate layer 13 or outside the housing 4, and the water cooling circulation layer is externally connected to cooling water to promote heat dissipation of the battery.

[0037] In some embodiments, the height of the partition 5 is 1 / 10 to 1 / 5 of the height of the cavity. The partition 5 occupies a small space, which can further promote the heat dissipation of the battery.

[0038] In some embodiments, the partition 5 can be slidably connected to the bottom of the housing 4. The position of the partition 5 can be adjusted according to the size of the battery. The redundant partition 5 can be slid to both sides of the housing 4 or directly removed.

[0039] In some embodiments, strip-shaped sliding holes 16 are respectively provided on both sides of the bottom of the housing 4, and a slider 7 is connected to the lower part of the partition 5. The partition 5 is slidably connected to the sliding hole 16 through the slider 7, and the slider 7 is clamped under the sliding hole 16. The slider 7 can be limited in the vertical direction to prevent the slider 7 from being separated from the sliding hole 16 during the sliding process.

[0040] Furthermore, the slider 7 is a limit slider 7 such as a dovetail slider 7 or a T-shaped slider 7.

[0041] In some embodiments, a lining plate 6 is fixedly connected to the lower part of the housing 4, and the bottom of the housing 4 has a lower opening, and the lower opening of the housing 4 is detachably connected to the bottom plate 8, and the lining plate 6 is located above the bottom plate 8, and the lining plate 6 and the bottom plate 8 are parallel to each other, and a gap is formed between the lining plate 6 and the bottom plate 8, and the sliding hole 16 is opened on the lining plate 6, and the bottom plate 8 supports the sliding block 7 to slide. When it is necessary to remove the redundant partition 5, the bottom plate 8 can be removed and the partition 5 can be taken out from the bottom of the housing 4.

[0042] Furthermore, the bottom plate 8 and the housing 4 are connected by bolts.

[0043] In some embodiments, a plurality of support beams are connected in the gap between the lining plate 6 and the bottom plate 8, and the support beams are located between the two sliding holes 16, so as to prevent the lining plate 6 from being deformed by compression after the battery is installed in the housing 4.

[0044] In some embodiments, the cover 3 and the shell 4 are connected via a first seal, and the bottom plate 8 and the shell 4 are connected via a second seal.

[0045] In some embodiments, the first sealing member is a first sealing ring connected to the lower edge of the cover body 3 , and the cover body 3 and the housing 4 are snap-fitted to each other and sealed by the first sealing ring.

[0046] In some embodiments, the second sealing member is a second sealing ring connected to the upper edge of the bottom plate 8 , and the bottom plate 8 and the housing 4 are connected by bolts and then sealed by the second sealing ring.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A lightweight battery box, characterized in that: include: A housing, the housing comprising an outer shell and a cavity surrounded by the outer shell for mounting a battery, the upper end of the outer shell having an upper opening; A cover body, wherein the cover body can be opened and closed and connected to the upper opening at the upper end of the outer shell, the lower end of the cover body is connected with a positive current collecting sheet and a negative current collecting sheet, the positive current collecting sheet and the negative current collecting sheet are both strip-shaped and arranged in parallel, the positive current collecting sheet is suitable for abutting the positive electrodes of all the batteries in the shell, and the negative current collecting sheet is suitable for abutting the negative electrodes of all the batteries in the shell, the upper end of the cover body is provided with a positive column and a negative column, the positive column is electrically connected to the positive current collecting sheet, and the negative column is electrically connected to the negative current collecting sheet, the materials of the outer shell and the cover body are both composite layer structures, and the composite layer structure includes a first fiber fabric layer, a first structural adhesive layer, a steel plate layer, a second structural adhesive layer and a second fiber fabric layer connected in sequence from the inside to the outside.

2. The lightweight battery box according to claim 1, characterized in that: A plurality of partitions are arranged at the bottom of the shell to separate the batteries placed side by side.

3. The lightweight battery box according to claim 2, characterized in that: The height of the partition is 1 / 10 to 1 / 5 of the height of the cavity.

4. The lightweight battery box according to claim 2, characterized in that: The partition plate can be slidably connected to the bottom of the shell.

5. The lightweight battery box according to claim 4, characterized in that: Strip-shaped sliding holes are respectively opened on both sides of the bottom of the shell, and a sliding block is connected to the lower part of the partition. The partition is slidably connected to the sliding hole through the sliding block, and the sliding block is clamped below the sliding hole.

6. The lightweight battery box according to claim 5, characterized in that: A lining plate is fixedly connected to the lower part of the shell, and the bottom of the shell has a lower opening. The lower opening of the shell is detachably connected to the bottom plate. The lining plate is located above the bottom plate. The lining plate and the bottom plate are parallel to each other. A gap is formed between the lining plate and the bottom plate. The sliding hole is opened on the lining plate, and the bottom plate supports the sliding of the slider.

7. The lightweight battery box according to claim 6, characterized in that: A plurality of support beams are connected in the gap between the lining plate and the bottom plate, and the support beams are located between the two sliding holes.

8. The lightweight battery box according to claim 6, characterized in that: The cover body is connected to the shell through a first seal, and the bottom plate is connected to the shell through a second seal.

9. The lightweight battery box according to claim 8, characterized in that: The first sealing member is a first sealing ring connected to the lower edge of the cover body, and the cover body and the housing are sealed and connected via the first sealing ring after being clipped to each other.

10. The lightweight battery box according to claim 8, characterized in that: The second sealing member is a second sealing ring connected to the upper edge of the bottom plate. The bottom plate and the housing are connected by bolts and then sealed by the second sealing ring.

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