A manufacturing method of a power battery bottom guard plate, a battery box and an electric device

Abstract

This application relates to the field of power battery technology, providing a method for manufacturing a power battery bottom protector, a battery housing, and electrical equipment, including the following steps: cleaning, cleaning the surface of the power battery to be processed where the bottom protector needs to be installed; setting up a barrier, setting up a barrier on the power battery, wherein the shape of the forming space enclosed by the barrier is adapted to the shape of the surface to be processed, and the surface to be processed faces upward; pouring, preparing a pre-formed liquid for solidification to form the bottom protector, injecting the pre-formed liquid into the forming space, and covering the surface to be processed with the pre-formed liquid; removing the barrier, removing the barrier after the pre-formed liquid has solidified. This application's solution has higher assembly efficiency, and the solidified bottom protector has higher integration and compatibility with the power battery, facilitating widespread application and reducing production costs.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and more specifically, to a method for manufacturing a power battery bottom protection plate, a battery housing, and electrical equipment. Background Technology

[0002] Currently, in order to better address the impacts such as bumps and ball strikes that the power batteries located at the bottom of new energy vehicles encounter during driving, a bottom protection plate is installed at the bottom of the power battery to reduce the damage caused by bumps and ball strikes to the power battery itself.

[0003] Bottom protection plates are usually made of metal, so they need to be molded. However, the mold-making cycle is long, and power batteries come in various sizes. Even if the size is the same, the bottom shape may be different depending on the flow channel design, which greatly increases the cost of mold making. At the same time, the bottom protection plate is installed and fixed by fasteners such as bolts. As the range demand continues to increase, the capacity of power batteries increases, resulting in larger and larger sizes. Therefore, more and more bolts are used, which not only further increases the cost, but also makes the installation very complicated. As a result, production efficiency not only does not improve, but actually decreases. Summary of the Invention

[0004] In order to overcome at least one of the disadvantages of the prior art, the purpose of this application is to provide a method for manufacturing a power battery bottom protection plate, a battery box, and an electrical device.

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

[0006] On one hand, this application provides a method for manufacturing a bottom protection plate for a power battery, including the following steps:

[0007] Cleaning involves cleaning the surface of the power battery to be processed where a bottom protective plate needs to be installed, in order to remove impurities adhering to the surface of the power battery to be processed.

[0008] A barrier is set up on the power battery so that the surface to be processed falls within the forming space enclosed by the barrier. The shape of the forming space enclosed by the barrier is adapted to the shape of the surface to be processed, and the surface to be processed is positioned facing upwards.

[0009] Casting, preparing a pre-formed liquid for solidification to form a bottom guard plate, injecting the pre-formed liquid into the molding space, and causing the pre-formed liquid to cover the surface to be processed;

[0010] Remove the barriers after the pre-formed liquid has solidified.

[0011] In this application, the bottom cover plate can be directly solidified on the surface to be processed by casting. Compared with the traditional bottom cover plate structure with independent plates, this application has higher assembly efficiency and the solidified bottom cover plate and the power battery can have higher integration. Moreover, the solidification method can be compatible with the shape and structure of various surfaces 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, wherein the shaping strips and the elastic connecting portion are connected at intervals to form a ring structure.

[0013] In this application, by providing an elastic connecting part on the fence, the formed fence can have a certain deformation basis, so that the fence can have a certain size compatibility.

[0014] In some embodiments, the number of shaping strips is the same as the number of sides of the power battery, and during installation, the elastic connecting portion corresponds to the corner connection of two adjacent sides of the power battery.

[0015] In this application, by associating the elastic connecting part with the corner connection of the side of the power battery, the enclosure can better fit the side of the power battery after it is installed on the power battery, thereby absorbing installation tolerances.

[0016] In some embodiments, the inner surface of the enclosure is treated with an anti-sticking agent before the pouring operation is performed.

[0017] The anti-sticking treatment includes at least one of spraying an anti-sticking liquid onto the inner side of the fence and setting an anti-sticking interlayer on the inner side of the fence.

[0018] In this application, by applying an anti-sticking treatment to the inner side of the fence, subsequent dismantling operations can be facilitated, and the dismantling of the fence can be avoided from causing adverse effects on the solidified bottom protective plate.

[0019] In some embodiments, after the pre-formed liquid is injected into the molding space, the pre-formed liquid is leveled.

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

[0021] In this application, by performing a leveling operation on the injected pre-prepared liquid, the leveling effect of the pre-prepared liquid can be improved, thereby improving the quality of the solidified bottom protection plate.

[0022] In some embodiments, after the pre-formed liquid is injected into the molding space, the pre-formed liquid is subjected to a curing process.

[0023] The curing process includes at least one of ultraviolet curing, heat curing, and curing with the addition of a curing agent.

[0024] In this application, by performing a solidification process on the pre-formed liquid, the molding time of the pre-formed liquid can be shortened, thereby improving production efficiency.

[0025] In some embodiments, the pre-formed liquid is solidified in layers on the surface to be processed, and the composition of the pre-formed liquid in different layers may be the same or different.

[0026] In this application, by solidifying the pre-made liquid in layers, a hierarchical structure can be easily formed within the molded bottom protective plate, thereby improving the overall performance of the bottom protective plate.

[0027] On the other hand, this application provides a battery housing with a bottom protective plate, which is prepared by the above-described method for manufacturing a power battery bottom protective plate.

[0028] In some embodiments, a liquid cooling plate is provided at the bottom of the battery housing, and the flow channel structure of the liquid cooling plate is convex on the side opposite to the battery housing.

[0029] The bottom protective plate is solidified on the liquid cooling plate.

[0030] In this application, by setting the liquid cooling plate at the bottom of the battery box, the pre-made liquid can be solidified on the surface of the flow channel structure of the liquid cooling plate, so as to increase the contact area between the bottom protective plate and the liquid cooling plate, thereby increasing the adhesion.

[0031] In addition, this application also provides an electrical device having a battery housing as described above.

[0032] Other features and advantages of this application will be set forth in the following description, or some features and advantages may be inferred from the content of the description or determined without doubt, or may be learned by implementing the above embodiments of this application. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating the manufacturing method of the bottom guard plate of the power battery, as exemplified in this application.

[0035] Figure 2 This is a schematic diagram of the casting of the bottom protective plate as an example of this application.

[0036] Figure 3 This is a schematic diagram of the structure of the bottom protective plate, which is one example of this application.

[0037] Figure 4 This is a schematic diagram of the structure of the bottom protective plate, which is one example of this application.

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

[0039] Figure 6 This is a partial installation diagram of the enclosure as one example of this application.

[0040] Marker explanation:

[0041] 1-Bottom protective plate, 11-First solidified layer, 12-Second solidified layer, 13-Third solidified layer;

[0042] 2-Power battery, 21-Surface to be processed, 22-Flow channel structure;

[0043] 3-Enclosure, 31-Forming space, 32-Shaping strip, 33-Elastic connection part. Detailed Implementation

[0044] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort 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 commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. Similar reference numerals and letters denote similar items in the following figures; therefore, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

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

[0047] Cleaning: Clean the surface 21 of the power battery 2 that needs to be processed to remove impurities attached to the surface 21 of the power battery 2.

[0048] A barrier 3 is set on the power battery 2 so that the surface to be processed 21 falls within the forming space 31 enclosed by the barrier 3. The shape of the forming space 31 enclosed by the barrier 3 is adapted to the shape of the surface to be processed 21, and the surface to be processed 21 is set facing upward.

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

[0050] Remove the enclosure 3 after the pre-formed liquid has solidified.

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

[0052] In some embodiments, when cleaning the surface 21 to be processed, a cleaning solution is used to clean the surface 21 to be processed, and impurities adhering to the surface 21 to be processed are removed through dissolution and other reactions, so as to avoid these adhering impurities from affecting the subsequent casting operation.

[0053] In some embodiments, after cleaning the surface 21 to be processed, a high-pressure air gun is used for spraying, thereby removing impurities and drying the surface 21 to be processed.

[0054] In some embodiments, the cleaning step and the setting up of the enclosure are not necessarily performed in any particular order; for example, the surface to be processed 21 and the enclosure 3 can be cleaned separately, and then the enclosure 3 can be installed on the power battery 2 to surround the surface to be processed 21; or, for another example, the enclosure 3 can 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 can be cleaned as a whole. The specific order is not limited here.

[0055] In some embodiments, after the removal of the enclosure is carried out, the formed bottom protective plate 1 needs to be inspected, including shape inspection and protective performance inspection.

[0056] By using a casting method, the bottom protective plate 1 can be directly solidified on the surface 21 to be processed. Compared with the traditional structure of a bottom protective plate with independent plates, this embodiment has higher assembly efficiency, eliminating the installation operation and investment costs of dozens or even hundreds of bolt components. Moreover, the solidified bottom protective plate 1 and the power battery 2 can have higher integration and better overall density. Furthermore, the solidification method can be compatible with various shapes and structures of the surface 21 to be processed, eliminating the need for mold making according to each shape and structure, which facilitates widespread application and effectively reduces production costs.

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

[0058] In some embodiments, such as 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 of the power battery 2 during installation. During installation, the flat surface is partially abutted against the outer side of the power battery 2, while the remaining part protrudes towards the outer side of the surface to be processed 21, thereby serving as the inner wall surface of the forming 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, and the elastic connecting part 33 is made of rubber.

[0061] By providing the elastic connecting part 33 on the enclosure 3, the entire enclosure 3 after molding can have a certain deformation basis, thereby enabling the enclosure 3 to have a certain size compatibility. Thus, through the elastic stretching of the elastic connecting part 33, the enclosure 3 can be applied to the power battery 2 with small size specification errors.

[0062] As one application example, see reference Figure 6 As shown, the number of shaping strips 32 is the same as the number of sides of the power battery 2. During installation, the elastic connecting part 33 corresponds to the corner connection of two adjacent sides 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 of the power battery 2 corresponding to it during installation.

[0064] By associating the elastic connecting 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 it is installed on the power battery 2. The elastic connecting part 33 absorbs the installation error at the corner, making the gap between the enclosure 3 and the power battery 2 more controllable.

[0065] As one application example, the inner surface of the enclosure 3 is treated with an anti-sticking agent before the pouring operation is performed.

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

[0067] In some embodiments, an anti-sticking liquid, such as a release agent, is sprayed onto the inner side of the enclosure 3 to facilitate the subsequent demolding operation between the enclosure 3 and the molded bottom protective plate 1.

[0068] In some embodiments, an anti-sticking partition is provided on the inner side of the enclosure 3, so that the anti-sticking partition can block the enclosure 3 from the molded bottom guard plate 1, which also facilitates the subsequent demolding operation.

[0069] In some embodiments, the non-stick interlayer is a piece of paper with a smooth surface.

[0070] In some embodiments, the anti-sticking layer is a film. When the application is in the form of a film, the film does not need to be completely removed after the bottom protective plate 1 has solidified.

[0071] By applying an anti-sticking treatment to the inner side of the enclosure 3, subsequent dismantling operations can be facilitated, and the dismantling of the enclosure 3 can be prevented from having an adverse effect on the solidified bottom protective plate 1.

[0072] As one application example, after the pre-formed liquid is injected into the molding space 31, the pre-formed liquid is leveled.

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

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

[0075] In some embodiments, a pressure plate is provided above the surface 21 to be processed, so that after the pre-prepared liquid is poured, the pressure plate presses down on the liquid surface, so that the pre-prepared liquid can be better leveled and compacted.

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

[0077] As one application example, after the pre-formed liquid is injected into the molding space 31, the pre-formed liquid is cured.

[0078] The curing process includes at least one of ultraviolet curing, heat curing, and curing with the addition of a curing agent.

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

[0080] By solidifying the pre-formed liquid, the molding time of the pre-formed liquid can be shortened, thereby improving production efficiency.

[0081] As one application example, the pre-formed liquid is solidified in layers on the surface to be processed 21, and the composition of the pre-formed liquid in different layers may be the same or different.

[0082] In some embodiments, the pre-formed liquid is a gel material formed from AB glue, resin material, or organosilicon material.

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

[0084] In some embodiments, reference Figure 4 As shown, the bottom protective plate 1 formed after the pre-formed liquid is molded has a two-layer structure, including a first solidified layer 11 solidified on the surface to be processed 21 and a second solidified layer 12 solidified on the first solidified layer 11. The first solidified layer 11 is made of foaming material, such as resin material and organosilicon material, so that the first solidified layer 11 after molding can have a certain compressive elasticity to buffer the impact energy at the bottom. 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 protective plate 1.

[0085] In some embodiments, reference Figure 4 As shown, the bottom protective plate 1 formed after the pre-formed liquid is molded has a three-layer structure, including a third solidified layer 13 solidified on the innermost side of the bottom protective plate 1. At this time, the third solidified layer 13 solidifies on the surface 21 to be processed, and the first solidified layer 11 solidifies on the third solidified layer 13. The third solidified layer 13 is made of AB glue and / or polyurea material, so that the molded third solidified layer 13 can have a certain rigidity, thereby providing closer protection to the surface 21 to be processed.

[0086] In some embodiments, the specific number of layers of the molded bottom protective plate 1 can be selected according to design requirements; moreover, the materials of each solidified layer can also be rearranged according to requirements, without specific limitations.

[0087] In some embodiments, the bottom protective plate 1 formed after the pre-formed liquid is molded has a structure of at least two layers, and each layer uses the same material, only differing in solidification time.

[0088] In some embodiments, glass fiber material is added to the pre-formed liquid to improve the strength of the molded bottom protective plate 1.

[0089] By solidifying the pre-made liquid in layers, a hierarchical structure can be easily formed within the molded bottom protective plate 1, thereby improving the overall performance of the bottom protective plate 1.

[0090] On the other hand, reference Figures 2 to 6 As shown, this embodiment provides a battery housing with a bottom protective plate 1 on it. The bottom protective plate 1 is prepared by the above-described method for manufacturing a power battery bottom protective plate.

[0091] In some embodiments, such as 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 convex on the side facing away from the battery box.

[0092] The bottom protective plate 1 is solidified on the liquid cooling plate.

[0093] By setting the liquid cooling plate at the bottom of the battery box, the pre-made liquid can solidify on the surface of the flow channel structure of the liquid cooling plate, thereby increasing the contact area between the bottom protective plate 1 and the liquid cooling plate, and thus increasing the adhesion.

[0094] In addition, this embodiment also provides an electrical device, which is equipped with a battery box as described above.

[0095] In some embodiments, the electrical equipment includes applications such as automobiles and industrial transport vehicles.

[0096] The above description is merely a specific embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should also be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0097] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A method for manufacturing a power battery bottom guard plate, characterized in that, Includes the following steps: Cleaning involves cleaning the surface of the power battery to be processed where a bottom protective plate needs to be installed, in order to remove impurities adhering to the surface of the power battery to be processed. A barrier is set up on the power battery so that the surface to be processed falls within the forming space enclosed by the barrier. The shape of the forming space enclosed by the barrier is adapted to the shape of the surface to be processed, and the surface to be processed is positioned facing upwards. Casting, preparing a pre-formed liquid for solidification to form a bottom guard plate, injecting the pre-formed liquid into the molding space, and causing the pre-formed liquid to cover the surface to be processed; Remove the barriers after the pre-formed liquid has solidified. The enclosure includes several shaped strips and elastic connecting parts for connecting two adjacent shaped strips. The shaped strips and the elastic connecting parts are connected at intervals to form a ring structure.

2. The method for manufacturing the bottom protection plate of the power battery according to claim 1, characterized in that, The number of shaping strips is the same as the number of sides of the power battery. During installation, the elastic connecting part corresponds to the corner connection of two adjacent sides of the power battery.

3. The method for manufacturing the bottom protective plate of the power battery according to claim 1 or 2, characterized in that, Before performing the pouring operation, the inner side of the enclosure is treated with an anti-sticking agent. The anti-sticking treatment includes at least one of spraying an anti-sticking liquid onto the inner side of the fence and setting an anti-sticking interlayer on the inner side of the fence.

4. The method for manufacturing the bottom protection plate of the power battery according to claim 1, characterized in that, After the pre-formed liquid is injected into the molding space, the pre-formed liquid is leveled. The leveling process includes at least one of vibration leveling and pressing with a pressure plate.

5. The method for manufacturing the bottom protection plate of the power battery according to claim 1, characterized in that, After the pre-formed liquid is injected into the molding space, the pre-formed liquid is cured. The curing process includes at least one of ultraviolet curing, heat curing, and curing with the addition of a curing agent.

6. The method for manufacturing the bottom protective plate of the power battery according to any one of claims 1, 4, and 5, characterized in that, The pre-formed liquid solidifies in layers on the surface to be processed, and the composition of the pre-formed liquid in different layers may be the same or different.

7. A battery housing, characterized in that, The battery box is provided with a bottom protective plate, which is prepared by the method for manufacturing a power battery bottom protective plate according to any one of claims 1-6.

8. The battery housing according to claim 7, characterized in that, The bottom of the battery box is provided with a liquid cooling plate, and the flow channel structure of the liquid cooling plate is convex on the side away from the battery box. The bottom protective plate is solidified on the liquid cooling plate.

9. An electrical appliance, characterized in that, It is provided with a battery housing as described in claim 7 or 8.

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