Mechanical connection structure of battery pack liquid cooling plate rigid support

Abstract

The utility model provides a mechanical connection structure of a battery pack liquid cooling plate rigid support, which solves the problem that the battery pack liquid cooling plate needs more fasteners and the like, and comprises a metal heat conducting plate and a non-metal heat conducting plate, the heat conducting plate and the non-heat conducting plate are attached to each other, and a liquid flow channel is reserved between the heat conducting plate and the non-heat conducting plate. Fastening holes located between the liquid flow channels are formed between the heat conducting plate and the non-heat conducting plate, threaded pieces are arranged in the fastening holes in a penetrating mode, the heat conducting plate and the non-heat conducting plate are pressed and fixed, sealing gaskets located on the two sides of the liquid flow channels are clamped and fixed between the heat conducting plate and the non-heat conducting plate, and the heat conducting plate and the battery cover are integrally formed. The utility model has the advantages of good leakproofness, light weight degree and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy battery equipment, and particularly relates to a mechanical connection structure for rigid support of a liquid cooling plate of a battery pack. Background Art

[0002] There is often a liquid cooling plate in the battery pack of a new energy vehicle, which is an important component in the battery pack thermal management system and is used to control the temperature of the battery. Currently, the liquid cooling plate is usually formed by welding two metal plates, and there are pipes between the two metal plates through which a flowing heat-conducting liquid is passed to transfer heat. When the liquid cooling plate is placed on the upper or lower part of the battery pack, the surface in contact with the battery cells or battery modules needs to conduct heat, while the other surface needs to be heat-insulated to reduce heat loss and reduce the energy consumption of refrigeration and heating. This surface is a non-heat-conducting surface. Currently, the mainstream solution is to cover a heat-insulating pad on the non-heat-conducting surface. In order to further reduce the energy consumption of refrigeration and heating, it is necessary to improve the heat insulation of the non-heat-conducting surface. Currently, there is a solution in which the non-heat-conducting surface of the liquid cooling plate uses a non-metallic material to replace the metal plate, because the non-metallic material has higher heat insulation than the metal material. However, in the actual use process, the existing mechanical connection structure requires a large number of fasteners, which increases the weight of the parts, increases the process complexity, increases the difficulty of part quality control, and increases the cost. In addition, there are many fastening joints, which reduces the effective heat-conducting area between the battery cells or battery modules and the metal plate and reduces the heat conductivity.

[0003] In order to solve the deficiencies of the existing technology, people have carried out long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a heat-conducting silica gel pad and a battery module [201810230251.7], which includes a first silica gel pad, a second silica gel pad and a silica gel pad connecting part; the silica gel pad connecting part is fixedly connected to the first silica gel pad and the second silica gel pad respectively, so that the first silica gel pad can be flipped relative to the second silica gel pad through the silica gel pad connecting part; a plurality of first holes are formed on the first side surface of the first silica gel pad, and a plurality of second holes are formed on the second side surface of the second silica gel pad. The distribution and size of the first holes correspond to and match the heat distribution of the target object in contact with the first side surface, and the distribution and size of the second holes correspond to and match the heat distribution of the target object in contact with the second side surface.

[0004] The above solution solves the problem of battery heat conduction to a certain extent, but there are still many deficiencies in this solution, such as too many fasteners required to ensure liquid tightness. Summary of the Invention

[0005] The purpose of the utility model is to provide a mechanical connection structure for rigid support of a liquid cooling plate of a battery pack with reasonable design and effectively reducing the amount of fasteners.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, including a heat-conducting plate made of a metal material and a non-heat-conducting plate made of a non-metal material. The heat-conducting plate and the non-heat-conducting plate are mutually attached and there is a liquid flow channel therebetween. Fastening holes are provided between the heat-conducting plate and the non-heat-conducting plate and located between the liquid flow channels. A threaded member is inserted into the fastening holes to press and fix the heat-conducting plate and the non-heat-conducting plate. Sealing gaskets are clamped and fixed between the heat-conducting plate and the non-heat-conducting plate on both sides of the liquid flow channel. The heat-conducting plate is integrally formed with the battery cover.

[0007] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, a locking component is provided at the edge of the heat-conducting plate and the non-heat-conducting plate, and a positioning component is provided between the heat-conducting plate and the non-heat-conducting plate.

[0008] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, the locking component includes a locking groove provided at the edge of the heat-conducting plate, and a locking fastener connected to the edge of the non-heat-conducting plate and inserted into the locking groove. The locking fastener is integrally formed with the non-heat-conducting plate and can undergo elastic deformation.

[0009] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, the positioning component includes a positioning groove arranged on the heat-conducting plate, and a positioning strip on the non-heat-conducting plate inserted into the positioning groove. The cross-sections of the positioning groove and the positioning strip are trapezoidal, and a limiting component and a reinforcement component are provided between the positioning groove and the positioning strip.

[0010] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, the limiting component includes limiting strips arranged on both sides of the positioning strip and extending axially, and limiting grooves for the limiting strips to be pressed into are arranged on the inner side of the positioning groove.

[0011] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, the reinforcement component includes a reinforcement rod vertically provided at the bottom of the positioning groove, a reinforcement hole for the reinforcement rod to pass through is provided on the non-heat-conducting plate, and a reinforcement nut threadedly connected to the reinforcement hole and tightly attached to and pressing the upper end of the non-heat-conducting plate.

[0012] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, a sealing groove for the sealing gasket to be pressed into is provided between the heat-conducting plate and the non-heat-conducting plate, and the bottom of the sealing groove has a sealing surface protruding towards the sealing gasket.

[0013] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, the width of the sealing groove gradually increases from the bottom to the top, and the sealing gasket is compressed and deformed to fit and press tightly against the inside of the sealing groove.

[0014] In the above mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, reinforcing ribs are distributed on the non-heat-conducting plate.

[0015] In the above mechanical connection structure for rigid support of the liquid cooling plate of the battery pack, the heat conducting plate is made of aluminum plate, and the non-heat conducting plate is made of resin matrix composite material.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows: the heat conducting plate and the non-heat conducting plate improve the sealing effect of the liquid flow channel through the sealing gasket, thereby reducing the usage amount of the fasteners between them; the locking component and the positioning component ensure the fitting and positioning accuracy of the plate body, ensure the smoothness inside the liquid flow channel, and prevent dislocation; the sealing groove fits and presses with the sealing gasket, and the sealing gasket is deformed under pressure to further improve its sealing effect and prevent the leakage of the coolant therein. Brief Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model;

[0018] Figure 2 is the structural sectional view of the locking component of the present utility model;

[0019] Figure 3 is the structural sectional view of the positioning component of the present utility model;

[0020] Figure 4 is the partial sectional view of the present utility model;

[0021] In the figure, heat conducting plate 1, non-heat conducting plate 2, liquid flow channel 3, fastening hole 4, sealing gasket 5, locking component 6, locking groove 61, locking fastener 62, positioning component 7, positioning groove 71, positioning strip 72, limiting strip 73, limiting groove 74, reinforcing rod 75, reinforcing hole 76, reinforcing nut 77, sealing groove 8, sealing surface 81, reinforcing rib 82. Detailed Description of the Preferred Embodiment

[0022] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments.

[0023] As Figures 1-4 shown, a mechanical connection structure for rigid support of the liquid cooling plate of the battery pack includes a heat conducting plate 1 made of metal material and a non-heat conducting plate 2 made of non-metal material. The heat conducting plate 1 and the non-heat conducting plate 2 are mutually attached and there is a liquid flow channel 3 therebetween. The liquid flow channel 3 is arranged in a coiled manner and there are liquid inlets and outlets communicated with the liquid flow channel 3 at the edges of the heat conducting plate 1 and the non-heat conducting plate 2. Fastening holes 4 corresponding to each other and located between the liquid flow channels 3 are formed between the heat conducting plate 1 and the non-heat conducting plate 2. Threaded members are inserted into the fastening holes 4 to press and fix the heat conducting plate 1 and the non-heat conducting plate 2. In addition to threaded members, riveting members can also be used for replacement. Sealing gaskets 5 located on both sides of the liquid flow channel 3 are clamped and fixed between the heat conducting plate 1 and the non-heat conducting plate 2. The sealing gaskets 5 are made of elastic materials to seal the gaps therebetween. The heat conducting plate 1 is integrally formed with the battery cover to improve its heat conduction effect.

[0024] Specifically, in order to further improve the installation stability at the edge of the plate body, a locking component 6 is provided at the edge of the heat-conducting plate 1 and the non-heat-conducting plate 2 to provide a pre-tightening force, facilitating the subsequent assembly of threaded parts. A positioning component 7 is arranged between the heat-conducting plate 1 and the non-heat-conducting plate 2 to ensure the accurate positioning of the gasket 5 and prevent the plate body from being misaligned and applying excessive shear force to the gasket 5.

[0025] In-depth, different from conventional locks, the locking component 6 in this application includes a locking groove 61 arranged at the edge of the heat-conducting plate 1. A locking buckle 62 inserted into the locking groove 61 is connected to the edge of the non-heat-conducting plate 2. The locking buckle 62 is integrally formed with the non-heat-conducting plate 2 and can undergo elastic deformation. After the heat-conducting plate 1 is fixed to the battery, the non-heat-conducting plate 2 is pressed against the heat-conducting plate 1. The locking buckle 62 at the edge automatically snaps into the locking groove 61, and the edges of the heat-conducting plate 1 and the non-heat-conducting plate 2 remain flush.

[0026] Furthermore, the positioning component 7 includes a positioning groove 71 arranged on the heat-conducting plate 1. The non-heat-conducting plate 2 has a positioning strip 72 inserted into the positioning groove 71. The cross-sections of the positioning groove 71 and the positioning strip 72 are trapezoidal, and a limiting component and a reinforcement component are arranged between the positioning groove 71 and the positioning strip 72.

[0027] Even further, the limiting component includes limiting strips 73 arranged on both sides of the positioning strip 72 and extending axially. Limiting grooves 74 for pressing the limiting strips 73 into are arranged inside the positioning groove 71.

[0028] In addition, the reinforcement component includes a reinforcement rod 75 vertically arranged at the bottom of the positioning groove 71. A reinforcement hole 76 for the reinforcement rod 75 to pass through is opened on the non-heat-conducting plate 2, and a reinforcement nut 77 that fits and presses against the upper end of the non-heat-conducting plate 2 is threadedly connected to the reinforcement hole 76.

[0029] Meanwhile, a sealing groove 8 for pressing the gasket 5 into is arranged between the heat-conducting plate 1 and the non-heat-conducting plate 2. The bottom of the sealing groove 8 has a sealing surface 81 protruding towards the gasket 5.

[0030] Visibly, the width of the sealing groove 8 gradually increases from the bottom to the top, and the gasket 5 is compressed and deformed to fit and press against the inside of the sealing groove 8.

[0031] Obviously, reinforcing ribs 82 are distributed on the non-heat-conducting plate 2.

[0032] Preferably, the heat-conducting plate 1 is made of an aluminum plate, and the non-heat-conducting plate 2 is made of a resin-based composite material.

[0033] In summary, the principle of this embodiment is as follows: The heat-conducting plate 1 and the non-heat-conducting plate 2 are stacked with a liquid flow channel 3 left between them. The gaps between the heat-conducting plate 1 and the non-heat-conducting plate 2 on both sides of the liquid flow channel 3 are sealed by the gasket 5 to ensure the sealing effect, and the heat-conducting plate 1 and the non-heat-conducting plate 2 are pressed by threaded parts to ensure the sealing effect at the sealing part.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0035] Although terms such as heat conducting plate 1, non - heat conducting plate 2, liquid flow channel 3, fastening hole 4, gasket 5, locking component 6, locking groove 61, locking fastener 62, positioning component 7, positioning groove 71, positioning strip 72, limiting strip 73, limiting groove 74, reinforcing rod 75, reinforcing hole 76, reinforcing nut 77, sealing groove 8, sealing surface 81, and reinforcing rib 82 are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A mechanical connection structure for rigid support of a liquid cooling plate of a battery pack, comprising a heat-conducting plate (1) made of a metal material and a non-heat-conducting plate (2) made of a non-metal material. The heat-conducting plate (1) and the non-heat-conducting plate (2) are mutually attached and there is a liquid flow channel (3) therebetween. It is characterized in that, A fastening hole (4) located between the liquid flow channel (3) is provided between the heat conducting plate (1) and the non-heat conducting plate (2); a threaded member is inserted into the fastening hole (4) and presses and fixes the heat conducting plate (1) and the non-heat conducting plate (2); a sealing gasket (5) located on both sides of the liquid flow channel (3) is clamped and fixed between the heat conducting plate (1) and the non-heat conducting plate (2); and the heat conducting plate (1) and the battery cover are integrally formed.

2. The mechanical connection structure for rigid support of the liquid cooling plate of a battery pack according to claim 1, wherein Locking components (6) are provided at the edges of the heat-conducting plate (1) and the non-heat-conducting plate (2), and a positioning component (7) is provided between the heat-conducting plate (1) and the non-heat-conducting plate (2).

3. The mechanical connection structure for rigid support of the liquid cooling plate of a battery pack according to claim 2, wherein The locking assembly (6) comprises a locking groove (61) arranged at the edge of the heat-conducting plate (1); the edge of the non-heat-conducting plate (2) is connected with a locking buckle (62) inserted into the locking groove (61); the locking buckle (62) and the non-heat-conducting plate (2) are integrally formed and can be elastically deformed.

4. The mechanical connection structure for rigid support of the liquid cooling plate of a battery pack according to claim 2, wherein The positioning assembly (7) comprises a positioning groove (71) arranged on the heat-conducting plate (1); the non-heat-conducting plate (2) has a positioning strip (72) inserted into the positioning groove (71); the positioning groove (71) and the positioning strip (72) have trapezoidal cross-sections; and a limiting assembly and a reinforcing assembly are arranged between the positioning groove (71) and the positioning strip (72).

5. The mechanical connection structure for rigid support of the liquid cooling plate of a battery pack according to claim 4, characterized in that, The limiting assembly comprises limiting strips (73) arranged on both sides of the positioning strip (72) and extending in the axial direction, and a limiting groove (74) for the limiting strip (73) to be pressed into is arranged inside the positioning groove (71).

6. The mechanical connection structure for rigid support of the liquid cooling plate of a battery pack according to claim 4, wherein The reinforcement assembly comprises a reinforcement rod (75) vertically arranged at the bottom of the positioning groove (71); a reinforcement hole (76) for the reinforcement rod (75) to pass through is opened on the non-heat-conducting plate (2); and the reinforcement hole (76) is threadedly connected to a reinforcement nut (77) that fits and presses against the upper end of the non-heat-conducting plate (2).

7. A mechanical connection structure for rigidly supporting a liquid cooling plate of a battery pack according to claim 1, characterized in that A sealing groove (8) for pressing the sealing gasket (5) is provided between the heat-conducting plate (1) and the non-heat-conducting plate (2), and the bottom of the sealing groove (8) has a sealing surface (81) protruding toward the sealing gasket (5).

8. The mechanical connection structure for rigid support of the liquid cooling plate of a battery pack according to claim 7, wherein The width of the sealing groove (8) gradually increases from the bottom to the top, and the sealing pad (5) is deformed under pressure and fits tightly against the inside of the sealing groove (8).

9. The mechanical connection structure for rigid support of the liquid cooling plate of the battery pack according to claim 1, characterized in that, Reinforcing ribs (82) are distributed on the non-heat-conducting plate (2).

10. The mechanical connection structure for rigid support of the liquid cooling plate of a battery pack according to claim 1, characterized in that, The heat-conducting plate (1) is made of an aluminum plate, and the non-heat-conducting plate (2) is made of a resin-based composite material.

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