Manufacturing method of power battery bottom protection plate, battery box body and electric equipment

Abstract

The invention relates to the technical field of power batteries, and provides a manufacturing method of a power battery bottom protection plate, a battery box body and electric equipment, and the manufacturing method comprises the following steps: cleaning: cleaning a to-be-processed surface of a power battery needing to be provided with the bottom protection plate; a fence is arranged, the fence is arranged on the power battery, the shape of a forming space defined by the fence is matched with the shape of the to-be-machined surface, and the to-be-machined surface is arranged upwards; pouring is conducted, specifically, prefabricated liquid used for being solidified to form the bottom protection plate is prepared, the prefabricated liquid is injected into the forming space, and the to-be-machined surface is covered with the prefabricated liquid; and the fence is dismantled, and the fence is dismantled after the prefabricated liquid is solidified and formed. According to the scheme, the assembly efficiency is higher, higher integrity and compatibility are achieved between the solidified and formed bottom protection plate and the power battery, application and popularization are facilitated, and the production cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a method for manufacturing a bottom guard plate of a power battery, a battery box and electrical equipment. Background Art

[0002] At present, in order to better deal with the bumps, ball hits and other phenomena encountered by the power batteries installed at the bottom of new energy vehicles during driving, a bottom guard plate will be set at the bottom of the power battery to reduce the damage caused by bumps, ball hits and other phenomena to the power battery body.

[0003] The bottom guard plate is usually made of metal, so it is necessary to make a mold for the bottom guard plate. However, the mold making cycle is long, and the power battery has a variety of sizes. Even if the size is the same, the bottom shape may be different depending on the design of the flow channel, which greatly increases the mold making cost. At the same time, the bottom guard plate is installed and fixed by fasteners such as bolts. As the demand for battery life continues to increase, the capacity of the power battery increases, resulting in a larger size. Therefore, more and more bolts are used, which not only leads to a further increase in cost, but also very cumbersome installation, resulting in not only no improvement in production efficiency, but a decrease in it. Summary of the invention

[0004] In order to overcome at least one disadvantage of the above-mentioned prior art, the purpose of the present application is to provide a method for manufacturing a power battery bottom guard plate, a battery box and an electrical device.

[0005] The technical means adopted by this application to solve the above technical problems are:

[0006] On the one hand, the present application provides a method for manufacturing a power battery bottom guard plate, comprising the following steps:

[0007] Cleaning: cleaning the surface of the power battery to be processed where the bottom guard plate is required to be provided, so as to remove impurities attached to the surface of the power battery to be processed;

[0008] Setting an enclosure, and setting an enclosure on the power battery so that the surface to be processed falls within a molding space surrounded by the enclosure, wherein the shape of the molding space surrounded by the enclosure is adapted to the shape of the surface to be processed, and the surface to be processed is arranged to face upward;

[0009] Pouring, preparing a prefabricated liquid for solidification to form a bottom guard plate, injecting the prefabricated liquid into the molding space, and allowing the prefabricated liquid to cover the surface to be processed;

[0010] The enclosure is removed after the prefabricated liquid is solidified and formed.

[0011] In the present application, the bottom guard plate can be solidified and formed directly on the surface to be processed by casting. Compared with the structural form of the bottom guard plate with independent panels in traditional technology, the present application has higher assembly efficiency, and the solidified bottom guard plate and the power battery can have higher integrity; moreover, the solidification molding method can achieve compatibility with various shapes and structures of the surface to be processed, which is convenient for promotion and application, thereby effectively reducing production costs.

[0012] In some embodiments, the enclosure includes a plurality of shaping strips and an elastic connecting portion for connecting two adjacent shaping strips, and the shaping strips and the elastic connecting portions are connected with each other at intervals to form a ring structure.

[0013] In the solution of the present application, an elastic connecting portion is provided on the enclosure so that the enclosure after molding can have a certain deformation basis, so that the enclosure can have a certain dimensional compatibility.

[0014] In some embodiments, the number of the shaping strips is the same as the number of the side surfaces of the power battery. During installation, the elastic connecting portion corresponds to the corner connections between two adjacent side surfaces of the power battery.

[0015] In the present application, the elastic connection part is associated with the corner connection of the side of the power battery, so that after the enclosure is installed on the power battery, it can better fit with the side of the power battery, thereby absorbing the installation tolerance.

[0016] In some embodiments, before the pouring operation is performed, the inner side of the enclosure is subjected to an anti-sticking treatment;

[0017] The anti-sticking treatment includes at least one of spraying an anti-sticking liquid onto the inner side of the enclosure and providing an anti-sticking barrier on the inner side of the enclosure.

[0018] In the present application, by performing anti-sticking treatment on the inner side of the enclosure, subsequent removal operations can be facilitated, thereby preventing the removal of the enclosure from causing adverse effects on the solidified bottom guard plate.

[0019] In some embodiments, after the prefabricated liquid is injected into the molding space, the prefabricated liquid is leveled;

[0020] The leveling process includes at least one of vibration leveling and setting a pressing plate for leveling.

[0021] In the present application, by performing a leveling operation on the injected prefabricated liquid, the leveling effect of the prefabricated liquid can be improved, thereby improving the quality of the bottom guard plate after solidification.

[0022] In some embodiments, after the prefabricated liquid is injected into the molding space, the prefabricated liquid is solidified;

[0023] The curing treatment includes at least one of ultraviolet curing, heating curing, and curing by adding a curing agent.

[0024] In the solution of the present application, by solidifying the prefabricated liquid, the molding time of the prefabricated liquid can be shortened and the production efficiency can be improved.

[0025] In some embodiments, the prefabricated liquid is solidified in layers on the surface to be processed, and the components of the prefabricated liquid in different layers are the same or different.

[0026] In the present application, by subjecting the prefabricated liquid to layered solidification molding, a hierarchical structure can be formed in the molded bottom guard plate, so as to improve the overall performance of the bottom guard plate.

[0027] On the other hand, the present application provides a battery case, on which a bottom guard plate is arranged, and the bottom guard plate is prepared by the above-mentioned method for manufacturing a bottom guard plate of a power battery.

[0028] In some embodiments, a liquid cooling plate is disposed at the bottom of the battery box, and a flow channel structure of the liquid cooling plate is convexly disposed toward a side facing away from the battery box;

[0029] The bottom guard plate is solidified and formed on the liquid cooling plate.

[0030] In the present application, the liquid cooling plate is arranged at the bottom of the battery box so that the prefabricated liquid can be solidified and formed on the surface where the flow channel structure of the liquid cooling plate is located, so as to increase the contact area between the bottom guard plate and the liquid cooling plate, thereby increasing the adhesion.

[0031] In addition, the present application also provides an electrical device on which the battery box as described above is arranged.

[0032] Other features and advantages of the present application will be described in the subsequent description, or some features and advantages can be inferred or determined without doubt from the contents of the description, or can be learned by implementing the above-mentioned embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a flow chart of a method for manufacturing a bottom protective plate of a power battery according to one example of the present application.

[0035] Figure 2 This is a schematic diagram of casting the bottom guard plate according to one example of the present application.

[0036] Figure 3 This is a schematic structural diagram of an example lower bottom guard plate of the present application.

[0037] Figure 4 This is a schematic structural diagram of an example lower bottom guard plate of the present application.

[0038] Figure 5 This is a schematic diagram of the installation of the lower enclosure of one example of this application.

[0039] Figure 6 This is a schematic diagram of the partial installation of an example lower enclosure of this application.

[0040] Marking Description:

[0041] 1-bottom guard plate, 11-first solidification layer, 12-second solidification layer, 13-third solidification layer;

[0042] 2-power battery, 21-surface to be processed, 22-flow channel structure;

[0043] 3-enclosure, 31-molding space, 32-forming strip, 33-elastic connection part. DETAILED DESCRIPTION

[0044] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0045] It should be noted that: unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] like Figures 1 to 6 As shown, this embodiment provides a method for manufacturing a power battery bottom guard plate, comprising the following steps:

[0047] Cleaning: cleaning the surface 21 to be processed of the power battery 2 where the bottom guard plate 1 is to be provided, so as to remove impurities attached to the surface 21 to be processed of the power battery 2;

[0048] The enclosure 3 is provided on the power battery 2 so that the surface to be processed 21 falls within the molding space 31 surrounded by the enclosure 3, wherein the shape of the molding space 31 surrounded by the enclosure 3 is adapted to the shape of the surface to be processed 21, and the surface to be processed 21 is arranged upward;

[0049] Casting, preparing a prefabricated liquid for solidification to form the bottom guard plate 1, injecting the prefabricated liquid into the molding space 31, and making the prefabricated liquid cover the surface to be processed 21;

[0050] The enclosure 3 is removed, and the enclosure 3 is removed after the prefabricated liquid is solidified.

[0051] In some embodiments, the surface to be processed 21 is the bottom end surface of the power battery 2; and when the surface to be processed 21 is cleaned, a high-pressure air gun is used to spray the surface to be processed 21 to remove dust and other impurities on the surface to be processed 21.

[0052] In some embodiments, when the surface to be processed 21 is cleaned, a cleaning liquid is used to clean the surface to be processed 21, and impurities adhering to the surface to be processed 21 are removed through reactions such as dissolution, so as to prevent these adhering impurities from affecting subsequent casting operations.

[0053] In some embodiments, after the surface to be processed 21 is cleaned, a high-pressure air gun is used to spray and sweep the surface 21 to dry the surface to be processed 21 after removing impurities.

[0054] In some embodiments, the cleaning step and the enclosure setting step are performed in no particular order; for example, the surface to be processed 21 and the enclosure 3 may be cleaned separately, and after the cleaning operation, the enclosure 3 may be installed on the power battery 2 to surround the surface to be processed 21; for another example, the enclosure 3 may be installed on the power battery 2 first, and then the assembled enclosure 3 and the surface to be processed 21 on the power battery 2 may be cleaned as a whole. The specific order is not limited here.

[0055] In some embodiments, after the enclosure removal operation is performed, the formed bottom guard plate 1 needs to be inspected, including appearance inspection and protective performance inspection.

[0056] By casting, the bottom guard plate 1 can be solidified and formed directly on the surface to be processed 21. Compared with the structural form of the bottom guard plate with independent panels in traditional technology, this embodiment has higher assembly efficiency and can avoid the installation operation and investment cost of dozens or even hundreds of bolt assemblies. The solidified bottom guard plate 1 and the power battery 2 can have higher integrity and good overall density. Moreover, the solidification molding method can be compatible with various shapes and structures of the surface to be processed 21, and there is no need to open molds one by one according to the shape and structure, which is convenient for promotion and application, thereby effectively reducing production costs.

[0057] As an example of one of the applications, refer to Figure 2 , Figure 5 , Figure 6 As shown, the enclosure 3 includes a plurality of shaping strips 32 and an elastic connecting portion 33 for connecting two adjacent shaping strips 32 . The shaping strips 32 and the elastic connecting portions 33 are connected at intervals to form a ring structure.

[0058] In some embodiments, Figure 2 As shown, each of the shaping strips 32 has at least one flat surface, which is used to abut against the outer side surface of the power battery 2 during installation. During installation, part of the flat surface abuts against the outer side surface of the power battery 2, while the remaining part protrudes toward the outside of the surface to be processed 21, thereby serving as the inner wall surface of the molding space 31.

[0059] In some embodiments, the cross-sectional shape of the shaping strip 32 is rectangular, which facilitates the placement and fixation of the entire enclosure 3 .

[0060] In some embodiments, the shaping strip 32 is made of metal material, and the elastic connecting portion 33 is made of colloid material.

[0061] By arranging the elastic connection part 33 on the enclosure 3, the entire enclosure 3 after molding can have a certain deformation basis, so that the enclosure 3 can have a certain size compatibility, so that the elastic connection part 33 can be elastically stretched so that the enclosure 3 can be applied to the power battery 2 with a smaller size specification error.

[0062] As an example of one of the applications, refer to Figure 6 As shown, the number of the shaping strips 32 is the same as the number of the side surfaces of the power battery 2 . During installation, the elastic connecting portion 33 corresponds to the corner connection between two adjacent side surfaces of the power battery 2 .

[0063] In some embodiments, the length of the shaping strip 32 is not greater than the length of the side surface of the power battery 2 to which it corresponds during installation.

[0064] By associating the elastic connection part 33 with the corner connection of the side of the power battery 2, the enclosure 3 can better fit the side of the power battery 2 after being installed on the power battery 2, and the installation error at the corner is absorbed by the set elastic connection part 33, so that the controllability of the gap between the enclosure 3 and the power battery 2 can be higher.

[0065] As one application example, before the pouring operation, the inner side of the enclosure 3 is subjected to anti-sticking treatment;

[0066] The anti-sticking treatment includes at least one of spraying an anti-sticking liquid onto the inner side of the enclosure 3 and providing an anti-sticking barrier on the inner side of the enclosure 3 .

[0067] In some embodiments, an anti-sticking liquid, such as a spray release agent, is sprayed on the inner side of the enclosure 3 to facilitate the later demolding operation between the enclosure 3 and the formed bottom guard plate 1.

[0068] In some embodiments, an anti-sticking barrier is provided on the inner side of the enclosure 3, so that the anti-sticking barrier can be provided to block between the enclosure 3 and the molded bottom guard plate 1, which can also facilitate the subsequent demolding operation.

[0069] In some embodiments, the anti-sticking barrier is a piece of paper with a smooth surface.

[0070] In some embodiments, the anti-sticking barrier layer is a film. When the film is used, the film may not be completely removed after the bottom guard plate 1 is solidified.

[0071] By performing anti-sticking treatment on the inner side surface of the enclosure 3, the subsequent removal operation can be facilitated, and the removal of the enclosure 3 can be prevented from causing adverse effects on the solidified bottom guard plate 1.

[0072] As one application example, after the prefabricated liquid is injected into the molding space 31, the prefabricated liquid is leveled;

[0073] The leveling process includes at least one of vibration leveling and setting a pressing plate for leveling.

[0074] In some embodiments, the power battery 2 is placed on a device with a vibration function for pouring, so that during the pouring process of the prefabricated liquid, the operation of the vibration function can be controlled according to the leveling condition of the prefabricated liquid.

[0075] In some embodiments, a pressing plate is arranged above the surface to be processed 21, so that after the prefabricated liquid is poured, the pressing plate presses down the liquid surface so that the prefabricated liquid can be better leveled and compacted.

[0076] By performing a leveling operation on the injected prefabricated liquid, the leveling effect of the prefabricated liquid can be improved, thereby improving the quality of the bottom guard plate 1 after solidification and shortening the operation cycle.

[0077] As one application example, after the prefabricated liquid is injected into the molding space 31, the prefabricated liquid is solidified;

[0078] The curing treatment includes at least one of ultraviolet curing, heating curing, and curing by adding a curing agent.

[0079] In some embodiments, the curing agent is configured as glues of different components, and then the curing reaction is accelerated by mixing the glues.

[0080] By solidifying the prefabricated liquid, the molding time of the prefabricated liquid can be shortened and the production efficiency can be improved.

[0081] As one application example, the prefabricated liquid is solidified in layers on the surface to be processed 21, and the components of the prefabricated liquid in different layers are the same or different.

[0082] In some embodiments, the prefabricated liquid is a colloid material formed by AB glue, resin material or silicone material.

[0083] In some embodiments, Figure 3 As shown, the bottom guard plate 1 formed after the prefabricated liquid is molded is a one-layer structure.

[0084] In some embodiments, reference Figure 4 As shown, the bottom guard plate 1 formed after the prefabricated liquid is molded is a two-layer structure, including a first solidified layer 11 solidified on the surface 21 to be processed, and a second solidified layer 12 solidified on the first solidified layer 11; wherein, the first solidified layer 11 is made of foaming material, such as resin material and silicone material, so that the first solidified layer 11 after molding can have a certain compression elasticity for buffering the bottom impact energy; the second solidified layer 12 is made of resin material, such as polyurethane resin and epoxy resin, so that the second solidified layer 12 after molding can have a certain wear resistance, good density and high hardness, so as to extend the service life of the bottom guard plate 1.

[0085] In some embodiments, reference Figure 4 As shown, the bottom guard plate 1 formed after the prefabricated liquid is formed is a three-layer structure, and also includes a third solidified layer 13 solidified and formed on the innermost side of the bottom guard plate 1. At this time, the third solidified layer 13 is solidified and formed on the surface to be processed 21, and the first solidified layer 11 is solidified and formed on the third solidified layer 13. Among them, the third solidified layer 13 is made of AB glue and / or polyurea material, so that the third solidified layer 13 after molding can have a certain rigidity, so that it can protect the surface to be processed 21 more closely.

[0086] In some embodiments, the specific number of layers of the bottom guard plate 1 after molding can be selected according to design requirements; moreover, the materials of each solidified layer can also be rearranged according to requirements, and no specific restrictions are made here.

[0087] In some embodiments, the bottom guard plate 1 formed after the prefabricated liquid is molded has at least two layers, and the material of each layer is the same, but there is a difference in solidification time.

[0088] In some embodiments, glass fiber material is added to the prefabricated liquid to improve the strength of the bottom guard plate 1 after molding.

[0089] By subjecting the prefabricated liquid to layered solidification molding, a hierarchical structure can be formed in the molded bottom guard plate 1 to improve the overall performance of the bottom guard plate 1.

[0090] On the other hand, reference Figures 2 to 6 As shown, in this embodiment, a battery box is provided, on which a bottom guard plate 1 is arranged. The bottom guard plate 1 is prepared by the above-mentioned method for preparing a bottom guard plate of a power battery.

[0091] In some embodiments, Figure 5 , Figure 6 As shown, a liquid cooling plate is provided at the bottom of the battery box, and the flow channel structure 22 of the liquid cooling plate is convexly arranged toward the side facing away from the battery box;

[0092] The bottom guard plate 1 is solidified and formed on the liquid cooling plate.

[0093] By arranging the liquid cooling plate at the bottom of the battery box, the prefabricated liquid can be solidified and formed on the surface where the flow channel structure of the liquid cooling plate is located, so as to increase the contact area between the bottom guard plate 1 and the liquid cooling plate, thereby increasing the adhesion.

[0094] In addition, this embodiment also provides an electrical device, on which the battery box as described above is provided.

[0095] In some embodiments, the electrical equipment includes automobiles, industrial transport vehicles, and other application forms.

[0096] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0097] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A method for manufacturing a power battery bottom guard plate, characterized in that: The steps include: Cleaning: cleaning the surface of the power battery to be processed where the bottom guard plate is required to be provided, so as to remove impurities attached to the surface of the power battery to be processed; Setting an enclosure, and setting an enclosure on the power battery so that the surface to be processed falls within a molding space surrounded by the enclosure, wherein the shape of the molding space surrounded by the enclosure is adapted to the shape of the surface to be processed, and the surface to be processed is arranged to face upward; Pouring, preparing a prefabricated liquid for solidification to form a bottom guard plate, injecting the prefabricated liquid into the molding space, and allowing the prefabricated liquid to cover the surface to be processed; The enclosure is removed after the prefabricated liquid is solidified and formed.

2. The method for manufacturing a power battery bottom guard plate according to claim 1, characterized in that: The enclosure includes a plurality of shaping strips and an elastic connecting portion for connecting two adjacent shaping strips. The shaping strips and the elastic connecting portions are connected with each other at intervals to form a ring structure.

3. The method for manufacturing a power battery bottom guard plate according to claim 2, characterized in that: The number of the shaping strips is the same as the number of the side surfaces of the power battery. During installation, the elastic connecting portion corresponds to the corner connections of two adjacent side surfaces of the power battery.

4. The method for manufacturing a power battery bottom guard plate according to any one of claims 1 to 3, characterized in that: Before the pouring operation is performed, the inner side of the enclosure is subjected to anti-sticking treatment; The anti-sticking treatment includes at least one of spraying an anti-sticking liquid onto the inner side of the enclosure and providing an anti-sticking barrier on the inner side of the enclosure.

5. The method for manufacturing a power battery bottom guard plate according to claim 1, characterized in that: After injecting the prefabricated liquid into the molding space, leveling the prefabricated liquid; The leveling process includes at least one of vibration leveling and setting a pressing plate for leveling.

6. The method for manufacturing a power battery bottom guard plate according to claim 1, characterized in that: After injecting the prefabricated liquid into the molding space, curing the prefabricated liquid; The curing treatment includes at least one of ultraviolet curing, heating curing, and curing by adding a curing agent.

7. The method for manufacturing a power battery bottom guard plate according to any one of claims 1, 5 and 6, characterized in that: The prefabricated liquid is solidified in layers on the surface to be processed, and the components of the prefabricated liquid in different layers are the same or different.

8. A battery box, characterized in that: The battery box is provided with a bottom guard plate, and the bottom guard plate is prepared by the method for preparing a bottom guard plate of a power battery according to any one of claims 1 to 7.

9. The battery case according to claim 8, characterized in that: A liquid cooling plate is provided at the bottom of the battery box, and the flow channel structure of the liquid cooling plate is convexly arranged toward the side facing away from the battery box; The bottom guard plate is solidified and formed on the liquid cooling plate.

10. An electrical device, characterized in that: A battery box as claimed in claim 8 or 9 is arranged thereon.

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