Energy storage liquid cooling plate processing method and energy storage liquid cooling plate

Abstract

The invention belongs to the technical field of energy storage devices, and discloses an energy storage liquid cooling plate processing method and an energy storage liquid cooling plate, and the energy storage liquid cooling plate processing method comprises the following steps: preparing a runner plate through an injection mold; preparing a plane plate according to the runner plate; performing surface treatment on the surface plate to form a connecting part with a concave-convex structure; correspondingly attaching and fixing the surface plate and the runner plate; and hot-pressing the surface plate so as to melt the surface, directly facing the connecting part, of the runner plate and connect the runner plate with the connecting part in a sealing manner. The runner plate and the plane plate which are formed through injection molding are combined in a hot pressing mode, on the premise that sealing performance and explosion-proof performance are guaranteed and corrosion is not prone to occurring, structural design is convenient, heat dissipation efficiency and production efficiency are improved, and the runner plate is suitable for large-scale production.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and in particular to a method for processing an energy storage liquid cooling plate and an energy storage liquid cooling plate. Background Art

[0002] During the operation of the energy storage device, the battery will emit a lot of heat, and a cooling device is needed to cool it down. At present, liquid cooling plates with lower noise and higher heat dissipation efficiency are generally used to dissipate heat from the battery. Traditional liquid cooling plates combine the flow channel plate with the plane plate through processes such as brazing. This type of liquid cooling plate is not only costly, but also difficult to control the gap between the flow channel plate and the plane plate, resulting in difficulty in ensuring the sealing and easy corrosion. Therefore, some manufacturers currently use a combination of plastic flow channel plates and metal plane plates to solve the above problems. This type of liquid cooling plate needs to first mark the flow channel area on the plane plate, then inject a plastic preform on the plane plate, and then blow mold the plastic preform so that the preform in the flow channel area is inflated to form a flow channel. Although this type of liquid cooling plate can effectively control the gap, ensure sealing and is not easy to corrode, the processing steps are complicated and cumbersome, and because the flow channel is blow-molded, it is difficult to design a complex flow channel structure. Not only is the heat dissipation efficiency average, but the production efficiency is also limited, which is not suitable for large-scale production. Summary of the invention

[0003] The purpose of the present invention is to provide a method for processing an energy storage liquid cooling plate, which facilitates structural design, improves heat dissipation efficiency and production efficiency, and is suitable for large-scale production while ensuring sealing, explosion-proof and non-corrosive properties.

[0004] To achieve this purpose, the present invention adopts the following technical scheme: a method for processing an energy storage liquid cooling plate, comprising the following steps: preparing a flow channel plate through an injection mold; preparing a flat plate based on the flow channel plate; performing surface treatment on the flat plate to form a connecting portion with a concave-convex structure; correspondingly bonding and fixing the flat plate and the flow channel plate; hot pressing the flat plate so that the surface of the flow channel plate facing the connecting portion melts and is sealed and connected to the connecting portion.

[0005] Preferably, the surface treatment of the flat plate to form the connection portion comprises marking the flat plate according to the end face around the flow channel on the flow channel plate to form a connection position on the surface of the flat plate; and laser processing the connection position to form the connection portion.

[0006] Preferably, the connecting portion comprises a groove and an undercut structure formed by laser ablation.

[0007] Preferably, the connecting portion comprises a sponge-like surface structure with conical protrusions formed by laser marking.

[0008] Preferably, the hot pressing of the flat plate to seal the flow channel plate and the connecting portion comprises the following steps: using a hot plate to heat and extrude the flat plate and press the side of the flat plate away from the flow channel plate; or, using infrared rays to heat the flat plate and extrude the side of the flat plate away from the flow channel plate.

[0009] Preferably, the preparation of the flat plate according to the flow channel plate specifically comprises the following steps: providing a metal plate; cutting the metal plate according to the outer contour of the flow channel plate to obtain the flat plate having the same shape and size as the flow channel plate.

[0010] Preferably, the flow channel plate is provided with a first mounting hole, and after cutting the metal sheet according to the outer contour of the flow channel plate to obtain the flat plate having the same shape and size as the flow channel plate, the following steps are also included: marking the flat plate according to the first mounting hole to form a punching position on the surface of the flat plate; and drilling a hole at the punching position to obtain a second mounting hole corresponding to the first mounting hole.

[0011] Another object of the present invention is to provide an energy storage liquid cooling plate with good sealing, good explosion-proof and non-corrosive properties, free and convenient structural design, high heat dissipation efficiency, and adaptability to large-scale production.

[0012] To achieve this object, the present invention adopts the following technical solution: an energy storage liquid cooling plate, wherein the energy storage liquid cooling plate is processed by the above-mentioned energy storage liquid cooling plate processing method.

[0013] Preferably, a reinforcement portion is provided on a side of the flow channel plate facing away from the plane plate.

[0014] Preferably, the reinforcement portion includes a plurality of first reinforcement ribs and a plurality of second reinforcement ribs, the plurality of first reinforcement ribs are arranged at intervals along the length direction of the flow channel plate, the plurality of second reinforcement ribs are arranged at intervals along the width direction of the flow channel plate, and the first reinforcement ribs and the second reinforcement ribs are perpendicular to each other.

[0015] The beneficial effects of the present invention are as follows: the flow channel plate and the flat panel formed by injection molding are hot-pressed together. On the one hand, the cooled flow channel plate and the flat panel are sealed and connected through the connecting part, which can ensure that the connection between the flow channel plate and the flat panel has sufficient tensile and shear strength, meet the bursting pressure requirements and sealing requirements of the flow channel plate, ensure the sealing and explosion-proof properties of the energy storage liquid cooling plate, and the flow channel plate and the flat panel only need to be hot-pressed together and then wait for cooling to form the energy storage liquid cooling plate. The production steps are simple and fast, which can effectively improve the production efficiency and adapt to large-scale production. On the other hand, the flow channel plate is made of plastic material for one-time injection molding, which naturally has a certain thermal insulation and heat insulation capacity, which can effectively reduce the condensation phenomenon of the liquid cooling plate, avoid corrosion of the energy storage liquid cooling plate, and reduce the weight and production cost of the energy storage liquid cooling plate, which is convenient for the later assembly of the energy storage liquid cooling plate. At the same time, the injection-molded flow channel plate can freely design the flow channel structure to ensure the heat dissipation efficiency of the energy storage liquid cooling plate.

[0016] The present invention also proposes an energy storage liquid cooling plate, which is produced and processed by hot pressing a flow channel plate formed by injection molding and a flat panel. It has good sealing and explosion-proof properties and is not easy to corrode. It has a free and convenient structural design and high heat dissipation efficiency and is suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of the steps of the energy storage liquid cooling plate processing method of the present invention;

[0018] Figure 2 Is adopted Figure 1 A schematic diagram of the structure of the energy storage liquid cooling plate made by the method;

[0019] Figure 3 yes Figure 1 A flow chart of the steps of preparing a flat plate according to a flow channel plate;

[0020] Figure 4 yes Figure 3 A flowchart of the steps after cutting the metal sheet according to the outer contour of the runner plate;

[0021] Figure 5 yes Figure 1 A flow chart of the steps of performing surface treatment on a flat plate to form a connecting portion having a concave-convex structure;

[0022] Figure 6 yes Figure 2 A microscopic enlarged view of the cross section of the plane plate after surface treatment;

[0023] Figure 7 yes Figure 2 Axonometric microscopic enlarged image of the plane plate after surface treatment;

[0024] Figure 8 yes Figure 1A flow chart of the steps of heat pressing a flat panel;

[0025] Fig. 9 yes Figure 2 Schematic diagram of the structure of the flow channel plate.

[0026] In the figure: 100, flow channel plate; 110, flow channel; 120, first mounting hole; 130, reinforcement portion; 131, first reinforcement rib; 132, second reinforcement rib; 200, plane plate; 210, second mounting hole. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] Reference Figure 1 and Figure 2As shown, a method for processing an energy storage liquid cooling plate according to an embodiment of the present invention includes:

[0032] S100, preparing a flow channel plate 100 by an injection mold;

[0033] S200, preparing a plane plate 200 according to the flow channel plate 100;

[0034] S300, performing surface treatment on the flat plate 200 to form a connecting portion having a concave-convex structure;

[0035] S400, correspondingly attaching and fixing the plane plate 200 and the flow channel plate 100;

[0036] S500, hot pressing the flat plate 200, so that the surface of the flow channel plate 100 facing the connecting portion is melted and sealed with the connecting portion.

[0037] It can be understood that the flow channel plate 100 and the flat panel 200 formed by injection molding are hot-pressed together. On the one hand, the cooled flow channel plate 100 and the flat panel 200 are sealed and connected through the connecting portion, which can ensure that the connection between the flow channel plate 100 and the flat panel 200 has sufficient tensile and shear strength to meet the bursting pressure requirements and sealing requirements of the flow channel plate 100, and ensure the sealing and explosion-proof properties of the energy storage liquid cooling plate. In addition, the flow channel plate 100 is injection molded at one time, and the flow channel plate 100 and the flat panel 200 only need to be hot-pressed and then wait for cooling to form the energy storage liquid cooling plate, which saves two The time and labor costs required for mold opening and mold closing can simplify the production steps, effectively improve production efficiency, ensure the dimensional accuracy requirements of batch products, and thus adapt to large-scale production; on the other hand, the flow channel plate 100 is made of plastic material for one-time injection molding, which naturally has a certain thermal insulation and heat insulation ability, can effectively reduce the condensation phenomenon of the liquid cooling plate, avoid corrosion of the energy storage liquid cooling plate, and reduce the weight and production cost of the energy storage liquid cooling plate, which is convenient for the later assembly of the energy storage liquid cooling plate. At the same time, the injection molded flow channel plate 100 can freely design the structure of the flow channel 110. Exemplarily, the flow channel 110 can be designed with a variety of circuits corresponding to the battery structure to be cooled, and the turning points between the circuits are rounded to extend the refrigerant path, reduce the refrigerant movement loss, and ensure the heat dissipation efficiency of the energy storage liquid cooling plate.

[0038] Reference Figure 1 and Figure 3 As shown, it can be understood that step S200 includes:

[0039] S210, providing a metal plate;

[0040] S220 , cutting the metal plate according to the outer contour of the flow channel plate 100 to obtain a flat plate 200 having the same shape and size as the flow channel plate 100 .

[0041] Optionally, the metal plate may be an aluminum plate having good thermal conductivity and good ductility.

[0042] It is understandable that after injection molding the flow channel plate 100, the metal sheet can be laser cut according to the outer contour of the flow channel plate 100 to obtain a flat plate 200 consistent with the outer contour of the flow channel plate 100, ensuring that the peripheral end surface of the subsequently formed energy storage liquid cooling plate is flat, further facilitating the subsequent assembly and use of the energy storage liquid cooling plate.

[0043] Reference Figure 1 and Figure 4 As shown, it can be understood that the flow channel plate 100 is provided with a plurality of first mounting holes 120, and the plurality of first mounting holes 120 are arranged at intervals along the circumference of the flow channel plate 100, and the following steps are specifically included after step S220:

[0044] S221, marking the flat panel 200 according to the first mounting holes 120 to form punching positions on the surface of the flat panel 200;

[0045] S222 , drilling a hole at the punching position to obtain a second mounting hole 210 corresponding to the first mounting hole 120 .

[0046] Since the flow channel plate 100 is formed in one step by an injection mold, the structure of the flow channel plate 100 can be freely designed. Compared with the existing process of injection molding followed by blow molding, the flow channel plate 100 can be directly injection molded with the first mounting hole 120 at the edge. When the flat plate 200 is subsequently processed, the first mounting hole 120 can be used as a reference to laser punch a second mounting hole 210 corresponding to the first mounting hole 120 on the flat plate 200. When the flow channel plate 100 and the flat plate 200 are subsequently connected to form an energy storage liquid cooling plate, the first mounting hole 120 and the second mounting hole 210 are correspondingly connected, thereby forming a through-hole structure at the edge of the energy storage liquid cooling plate. The user can install the energy storage liquid cooling plate into the energy storage device through the through-hole structure and fasteners, which effectively improves the convenience of loading and unloading the energy storage liquid cooling plate without affecting the production efficiency of the energy storage liquid cooling plate.

[0047] Reference Figure 1 and Figure 5 As shown, it can be understood that step S300 specifically includes the steps of:

[0048] S310, marking the plane plate 200 according to the end surface around the flow channel 110 on the flow channel plate 100 to form a connection position on the surface of the plane plate 200;

[0049] S320, laser processing is performed on the connection position to form a connection portion having a concave-convex structure.

[0050] Among them, after the flat plate 200 is made according to the flow channel plate 100, the subsequent contact area of ​​the flat plate 200 with the flow channel plate 100 can be marked according to the end surface structure around the flow channel 110 on the flow channel plate 100 (that is, the connection position, i.e., the contact part between the flow channel plate 100 and the flat plate 200 when the flow channel plate 100 and the flat plate 200 are correspondingly fitted). The marked area is the connection position, and the connection position is laser processed to form a connection part with a micro-groove structure, or a connection part with a micro-convex structure, or a connection part with a micro-groove structure and a micro-convex structure.

[0051] Using the formed flow channel 110 as a reference, marking the connection position on the plane plate 200, and then processing to form the connection part, can ensure that the distribution of the connection part is uniform and accurate, and improve the overlap rate between the subsequent non-flow channel 110 area of ​​the flow channel plate 100 (i.e., the end face around the flow channel 110) and the connection part.

[0052] Reference Figure 6 and Figure 7 As shown, it can be understood that the connecting portion includes a groove and an undercut structure formed by laser ablation.

[0053] Specifically, a laser is used to scan and ablate the connection position. During the ablation process, the aluminum will partially melt and evaporate to form a groove. The molten aluminum liquid is sprayed out through high-pressure evaporation, and part of the aluminum liquid solidifies at the edge of the groove to form an undercut structure, and finally a connection part with fine and regular grooves and undercut structures is obtained. In step S300, when the flat plate 200 is hot-pressed, the flow channel plate 100 will be heated and melted and fill the groove in the connection part, so as to achieve a sealed connection between the flow channel plate 100 and the connection part.

[0054] Continue to refer to Figure 6 and Figure 7 As shown, it can be understood that the connecting portion includes a sponge-like surface structure with cone-shaped protrusions formed by laser marking.

[0055] Specifically, an ultrashort pulse laser is used to mark the connection position, a conical protrusion is formed at the connection position, and fine sponge-like grooves are formed around the root of the conical protrusion, and finally a connection portion with a conical protrusion and a sponge-like surface structure is obtained. In step S300, when the flat plate 200 is hot pressed, the flow channel plate 100 is heated and melted and covers the conical protrusion, while filling the sponge-like surface, so as to achieve a sealed connection between the flow channel plate 100 and the connection portion.

[0056] Reference Figure 1 and Figure 8 As shown, it can be understood that step S500 includes:

[0057] S510 , using a hot plate to heat and extrude the side of the flat plate 200 away from the flow channel plate 100 ; or, using infrared rays to heat the flat plate 200 , and extrude the side of the flat plate 200 away from the flow channel plate 100 .

[0058] Specifically, after the user uses a special jig or fixture to fit and fix the flat plate 200 and the runner plate 100, the flat plate 200 can be heated by hot plate extrusion, infrared heating, etc., and pressure is applied to the side of the flat plate 200 away from the runner plate 100 through a hot plate or an external pressure device. The metal flat plate 200 can quickly transfer heat to the runner plate 100, so that the injection-molded runner plate 100 is melted by the heat and fills or covers the connecting part with the microscopic concave-convex structure, thereby achieving a sealed connection with the connecting part.

[0059] Compared with the existing method of hot pressing the plastic and the flat panel 200 by the injection pressure of the injection mold, the flow channel plate 100 and the flat panel 200 are hot pressed together by heating and pressurizing the flat panel 200. The temperature control and pressure control are simpler and more convenient. The flow channel plate 100 is mainly melted by heat at the connection part, and the flow channel 110 area is not directly heated, which can maintain the stability of the structure and effectively improve the yield rate of the finished energy storage liquid cooling plate.

[0060] The present invention also provides an energy storage liquid cooling plate, which is processed by the above-mentioned energy storage liquid cooling plate processing method.

[0061] The energy storage liquid cooling plate provided in the embodiment of the present invention is processed by the above energy storage liquid cooling plate processing method. Therefore, the energy storage liquid cooling plate provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be described in detail here.

[0062] Reference Fig. 9 It can be understood that a reinforcement portion 130 is provided on a side of the flow channel plate 100 facing away from the plane plate 200 .

[0063] Due to the special installation form of the battery pack in the energy storage device, the box of the energy storage device is required to have good strength in the height direction. However, due to process limitations, the existing production method cannot make other reinforcement structures of the energy storage liquid cooling plate except the protrusion of the flow channel 110. The load-bearing requirements are completely dependent on the reinforcement frame used in conjunction with the energy storage liquid cooling plate, resulting in high design and cost pressures of the reinforcement frame.

[0064] The flow channel plate 100 is injection molded in one step, and the user can freely design a protruding reinforcement portion 130 on the side of the flow channel plate 100 away from the flat plate 200 to ensure that the energy storage liquid cooling plate has good structural strength.

[0065] Furthermore, the reinforcement portion 130 includes a plurality of first reinforcement ribs 131 and a plurality of second reinforcement ribs 132, the plurality of first reinforcement ribs 131 are arranged at intervals along the length direction of the flow channel plate 100, and the plurality of second reinforcement ribs 132 are arranged at intervals along the width direction of the flow channel plate 100, the first reinforcement ribs 131 and the second reinforcement ribs 132 are perpendicular to each other, and an end surface of one side of the first reinforcement rib 131 facing away from the flow channel plate 100, an end surface of one side of the second reinforcement rib 132 facing away from the flow channel plate 100, and an outer surface of the bottom wall of the flow channel 110 are flush.

[0066] The reinforcing portion 130 is configured as a first reinforcing rib 131 and a second reinforcing rib 132. On the premise of ensuring that the flow channel plate 100 has sufficient structural strength, the structure of the reinforcing portion 130 is simplified to facilitate injection molding of the flow channel plate 100. In addition, the first reinforcing rib 131, the second reinforcing rib 132 and the end surface of the bottom wall of the flow channel 110 are flush, which can increase the contact area between the energy storage liquid cooling plate and the reinforcing frame in the energy storage device, so that the energy storage liquid cooling plate can fit the reinforcing frame as closely as possible, which is convenient for the subsequent design and processing of the reinforcing frame.

[0067] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Energy storage liquid cooling plate processing method, characterized in that: The steps include: Preparing a flow channel plate (100) by means of an injection mold; Preparing a plane plate (200) according to the flow channel plate (100); Performing surface treatment on the plane plate (200) to form a connecting portion having a concave-convex structure; Correspondingly attaching and fixing the plane plate (200) and the flow channel plate (100); The plane plate (200) is hot pressed to melt the surface of the flow channel plate (100) directly facing the connection portion and seal the surface with the connection portion.

2. The energy storage liquid cooling plate processing method according to claim 1, characterized in that: The surface treatment of the flat plate (200) to form a connecting portion with a concave-convex structure specifically comprises the following steps: Marking the plane plate (200) according to the end surface around the flow channel (110) on the flow channel plate (100) to form a connection point on the surface of the plane plate (200); The connecting position is laser processed to form the connecting portion.

3. The energy storage liquid cooling plate processing method according to claim 2, characterized in that: The connecting portion includes a groove and an undercut structure formed by laser ablation.

4. The energy storage liquid cooling plate processing method according to claim 2, characterized in that: The connecting portion comprises a sponge-like surface structure with cone-shaped protrusions formed by laser marking.

5. The method for processing an energy storage liquid cooling plate according to any one of claims 1 to 4, characterized in that: The hot pressing of the flat plate (200) specifically comprises the following steps: Using a hot plate to press the side of the plane plate (200) away from the flow channel plate (100); Alternatively, infrared rays are used to heat the plane plate (200) and to press the side of the plane plate (200) away from the flow channel plate (100).

6. The energy storage liquid cooling plate processing method according to any one of claims 1 to 4, characterized in that: The method of preparing the flat plate (200) according to the flow channel plate (100) specifically comprises the following steps: Providing a metal plate; The metal plate is cut according to the outer contour of the flow channel plate (100) to obtain the plane plate (200) having the same shape and size as the flow channel plate (100).

7. The method for processing the energy storage liquid cooling plate according to claim 6, characterized in that: The flow channel plate (100) is provided with a first mounting hole (120), and after the metal plate is cut according to the outer contour of the flow channel plate (100) to obtain the plane plate (200) having the same shape and size as the flow channel plate (100), the following steps are also included: Marking the flat plate (200) according to the first mounting hole (120) to form a punching position on the surface of the flat plate (200); A hole is drilled at the punching position to obtain a second mounting hole (210) corresponding to the first mounting hole (120).

8. Energy storage liquid cooling plate, characterized in that: The energy storage liquid cooling plate is processed by the energy storage liquid cooling plate processing method according to any one of claims 1 to 7.

9. The energy storage liquid cooling plate according to claim 8, characterized in that: A reinforcement portion (130) is provided on a side of the flow channel plate (100) facing away from the plane plate (200).

10. The method for processing the energy storage liquid cooling plate according to claim 9, characterized in that: The reinforcing portion (130) comprises a plurality of first reinforcing ribs (131) and a plurality of second reinforcing ribs (132); the plurality of first reinforcing ribs (131) are arranged at intervals along the length direction of the flow channel plate (100); the plurality of second reinforcing ribs (132) are arranged at intervals along the width direction of the flow channel plate (100); and the first reinforcing ribs (131) and the second reinforcing ribs (132) are perpendicular to each other.

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