Battery pack liquid cooling plate runner structure with seal

Abstract

The invention belongs to the technical field of battery system sealing, and particularly relates to a battery pack liquid cooling plate runner structure with a sealing function, a liquid cooling connecting mechanism further comprises a connecting assembly, the connecting assembly comprises a reinforcing connecting plate, a rivet is installed on the inner surface of the reinforcing connecting plate in a clamped mode, and a rivet body is installed on the outer surface of the rivet in a sliding mode. The connecting assembly further comprises a connecting convex hull, and the outer surface of the connecting convex hull is fixedly connected with the inner surface of the backflow plate. The top end of the rivet penetrates through the connecting convex hull and extends to the inner surface of the connecting convex hull, and the bottom of the rivet body is connected with the top of the connecting convex hull in a clamped mode. According to the battery pack liquid cooling plate flow channel structure with the seal, the clamping holes in the reinforcing connecting plate are aligned with the clamping holes in the backflow plate, then the rivets are inserted into the clamping holes, then a user pulls the rivets, the rivet heads of the rivets move downwards, the cap body is extruded to deform, and the convex hulls of the reinforcing connecting plate and the backflow plate are connected together.

Description

Technical Field

[0001] The present invention relates to the technical field of battery system sealing, and particularly to a liquid cooling plate flow channel structure of a battery pack with a seal. Background Art

[0002] At present, with the rapid development of new energy technologies, lithium-ion batteries have become the core power sources for electric vehicles and various energy storage devices due to their advantages such as high energy density and long cycle life. As the industry's requirements for battery performance continue to rise, the energy density of batteries has been continuously improved and now has reached a level of 200 Wh / kg+ or more.

[0003] Battery packs usually operate in complex environments, and the sealing of the liquid cooling plate flow channels is crucial. If the coolant leaks, it will not only affect the heat dissipation effect but also may damage the battery pack, leading to potential safety hazards. Therefore, reliable sealing technologies and materials, such as bolts, nuts, and rubber, are required for connection. Through tight connection, the sealing effect can be achieved to ensure that the coolant circulates in the flow channel and prevent leakage. However, the following problems exist in actual operations:

[0004] 1. In existing battery systems, fasteners are directly used to penetrate multiple layers of plates for connection. Since there are irregular flow channels in the liquid cooling plate flow channel, the original fastener bolts will pass through the liquid cooling plate. When the bolts become loose abnormally, the sealing interface fails, and the mass cost of the battery pack increases. In response to this, a liquid cooling plate flow channel structure of a battery pack with a seal for battery pack heat dissipation is proposed.

[0005] 2. In existing battery systems, the flow channels in the liquid cooling plate are irregular, resulting in a long flow path. The temperature difference between the inlet coolant and the outlet coolant is high, and the small and long flow channels cause the coolant temperature to rise quickly, which will affect the service life of the battery. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the inventor of the present invention has conducted in-depth research and completed the present invention after a large amount of creative labor.

[0007] Specifically, the technical problem to be solved by the present invention is to provide a liquid cooling plate flow channel structure of a battery pack with a seal to solve the technical problems that the current connection method between liquid cooling plates has a sealing failure effect, and the temperature difference of the liquid cooling plate is high, the temperature rises quickly, and it affects the service life of the battery.

[0008] To solve the above technical problems, the present invention provides the following technical solution:

[0009] A liquid cooling plate flow channel structure of a battery pack with a seal, including an electric core, and a liquid cooling connection mechanism is fixedly installed at the bottom of the electric core;

[0010] The liquid cooling connection mechanism includes a liquid cooling component, and the liquid cooling component includes a liquid cooling plate. The top of the liquid cooling plate is fixedly connected to the bottom of the battery cell, and a liquid cooling joint is communicated with the top of the liquid cooling plate.

[0011] As an improved technical solution, the liquid cooling component further includes a backflow plate. The top of the backflow plate is fixedly connected to the bottom of the liquid cooling plate, and a liquid cooling groove is formed in the top of the backflow plate.

[0012] As an improved technical solution, the liquid cooling connection mechanism further includes a connection component. The connection component includes a strengthening connecting plate, a rivet is clamped and installed on the inner surface of the strengthening connecting plate, and a riveting body is slidably installed on the outer surface of the rivet.

[0013] As an improved technical solution, the connection component further includes a connecting convex hull. The outer surface of the connecting convex hull is fixedly connected to the inner surface of the backflow plate.

[0014] As an improved technical solution, the top end of the rivet penetrates through the connecting convex hull and extends to the inner surface of the connecting convex hull, and the bottom of the riveting body is clamped with the top of the connecting convex hull.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0016] 1. By adding a design with good sealing effect between the liquid cooling plates of the battery pack, through the combined use of the liquid cooling plate and the backflow plate and the liquid cooling groove, the originally multi-bent and thin-shaped cooling grooves are changed into liquid cooling grooves with a width of a square groove. Then, through the brazing process, the liquid cooling plate and the backflow plate are welded together to fill the gap between the liquid cooling plate and the backflow plate. Moreover, through the combined use of the strengthening connecting plate and the backflow plate, the rivet and the riveting body, the abnormal loosening of the original fastener riveting is effectively avoided, and the problem that a gap is generated between the liquid cooling plate and the backflow plate, resulting in the failure of the sealing interface is solved. At the same time, by connecting with external components through an independent structure, the risk of sealing failure caused by the rivet and the riveting body penetrating the liquid cooling plate and the backflow plate is reduced, and the quality loss caused by leakage is reduced.

[0017] 2. Through the combined use of the liquid cooling plate and the liquid cooling joint, the backflow plate and the liquid cooling groove, the flow rate of the coolant is fast and the flow rate is large, the temperature difference of the battery pack is smaller, and the temperature rising speed is lower, thereby prolonging the service life of the entire battery pack. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings. Among them:

[0019] Figure 1 This is the overall three-dimensional structure schematic diagram of the liquid cooling plate flow channel structure of the battery pack with a seal according to the present invention.

[0020] Figure 2 This is the exploded structure schematic diagram of the liquid cooling connection mechanism of the liquid cooling plate flow channel structure of the battery pack with a seal according to the present invention.

[0021] Figure 3 This is the sectional three-dimensional structure schematic diagram of the liquid cooling connection mechanism of the liquid cooling plate flow channel structure of the battery pack with a seal according to the present invention.

[0022] Figure 4 This is the three-dimensional structure schematic diagram of the battery cell, liquid cooling plate and liquid cooling joint of the liquid cooling plate flow channel structure of the battery pack with a seal according to the present invention.

[0023] Explanation of reference numerals:

[0024] 1. Battery cell; 2. Liquid cooling connection mechanism; 21. Liquid cooling component; 211. Liquid cooling plate; 212. Liquid cooling joint; 213. Backflow plate; 214. Liquid cooling tank; 22. Connection component; 221. Reinforcing connection plate; 222. Rivet; 223. Riveting body; 224. Connection convex hull. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously.

[0028] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] As Figure 1 , Figure 2 , Figure 3 and Figure 4 collectively shown, this embodiment provides a liquid-cooled plate flow channel structure for a battery pack with a seal. This liquid-cooled plate flow channel structure for a battery pack with a seal includes a battery cell 1, and a liquid-cooling connection mechanism 2 is fixedly installed at the bottom of the battery cell 1;

[0030] The liquid-cooling connection mechanism 2 includes a liquid-cooling component 21. The liquid-cooling component 21 includes a liquid-cooling plate 211. The top of the liquid-cooling plate 211 is fixedly connected to the bottom of the battery cell 1, and a liquid-cooling joint 212 is communicated with the top of the liquid-cooling plate 211.

[0031] As Figure 1 , Figure 2 and Figure 3 collectively shown, the liquid-cooling component 21 further includes a backflow plate 213. The top of the backflow plate 213 is fixedly connected to the bottom of the liquid-cooling plate 211, and a liquid-cooling groove 214 is formed in the top of the backflow plate 213.

[0032] The liquid-cooling groove 214 is in a zigzag shape and has a wide groove width.

[0033] As Figure 1 , Figure 2 and Figure 3 collectively shown, the connection component 22 further includes a connection convex hull 224. The outer surface of the connection convex hull 224 is fixedly connected to the inner surface of the backflow plate 213.

[0034] As Figure 1 , Figure 2 and Figure 3 collectively shown, the top end of the rivet 222 penetrates through the connection convex hull 224 and extends to the inner surface of the connection convex hull 224, and the bottom of the rivet body 223 is clamped with the top of the connection convex hull 224.

[0035] Both the backflow plate 213 and the connection convex hull 224 have card holes for connection.

[0036] In use, the user first cleans the area between the liquid cooling plate 211 and the reverse flow plate 213 to remove the oxide film and oil. Then, the liquid cooling plate 211 and the reverse flow plate 213 are assembled together in a lapped form. The solder is placed near or between the joint gaps. When the workpiece and the solder are heated to a temperature slightly higher than the melting point of the solder, the solder melts (the workpiece does not melt) and is drawn into and fills the gaps between the solid workpieces by capillary action. The liquid solder diffuses and dissolves with the workpiece metal, and after condensation, a soldered joint is formed to seal and connect the liquid cooling plate 211 and the reverse flow plate 213. When the battery cell 1 needs to be cooled, the coolant enters the liquid cooling tank 214 through the liquid cooling joint 212. Since the liquid cooling tank 214 is in a figure-eight shape, the coolant can flow quickly in the liquid cooling tank 214 to carry away the heat of the battery cell 1 and then flow out from another liquid cooling joint 212. When multiple liquid cooling assemblies 21 need to be assembled together, the user aligns the card holes on the reinforcement connecting plate 221 with the card holes on the reverse flow plate 213, then inserts the rivet 222 into them. Then, the user pulls the rivet 222, and the riveting head of the rivet 222 moves downward to squeeze and deform the cap body 223, connecting the reinforcement connecting plate 221 and the boss 224 of the reverse flow plate 213 together.

[0037] It should be understood that the use of these embodiments is only for illustrating the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications, and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A sealed battery pack liquid cooling plate flow channel structure, comprising a battery cell (1), characterized in that: A liquid cooling connection mechanism (2) is fixedly mounted on the bottom of the battery cell (1); The liquid cooling connection mechanism (2) comprises a liquid cooling component (21), the liquid cooling component (21) comprises a liquid cooling plate (211), the top of the liquid cooling plate (211) is fixedly connected to the bottom of the battery cell (1), and the top of the liquid cooling plate (211) is connected to a liquid cooling joint (212).

2. The sealed battery pack liquid cooling plate flow channel structure according to claim 1, characterized in that: The liquid cooling assembly (21) further comprises a backflow plate (213), the top of which is fixedly connected to the bottom of the liquid cooling plate (211), and a liquid cooling groove (214) is provided on the top of the backflow plate (213).

3. The sealed battery pack liquid cooling plate flow channel structure according to claim 1, characterized in that: The liquid cooling connection mechanism (2) also includes a connection assembly (22), wherein the connection assembly (22) includes a reinforcing connection plate (221), a rivet (222) being clamped and mounted on the inner surface of the reinforcing connection plate (221), and a rivet body (223) being slidably mounted on the outer surface of the rivet (222).

4. The sealed battery pack liquid cooling plate flow channel structure according to claim 3, characterized in that: The connection assembly (22) further comprises a connection convex bump (224), the outer surface of the connection convex bump (224) being fixedly connected to the inner surface of the inverted plate (213).

5. The sealed liquid cooling plate flow channel structure of the battery pack according to claim 3, characterized in that: The top end of the rivet (222) penetrates the connecting bulge (224) and extends to the inner surface of the connecting bulge (224), and the bottom of the rivet body (223) is clamped with the top of the connecting bulge (224).

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