Battery cold plate structure, battery assembly and vehicle

Abstract

The utility model relates to a battery technology, in particular to a battery cold plate structure, a battery assembly and a vehicle, the battery cold plate structure comprises a sealing flat plate, a sealing ring, a runner plate and a direct current plate which are sequentially arranged from top to bottom, and the sealing flat plate and the sealing ring form a step surface with the runner plate and the direct current plate on a YZ plane; corresponding mounting holes are formed in the runner plate and the straight flow plate in the step surface area and are used for being connected with a tray. The battery cold plate structure disclosed by the utility model is small in hole site accumulative error and low in cost.

Description

Technical Field

[0001] The utility model relates to battery technology, in particular to a cold plate structure, a battery assembly and a vehicle. Background Art

[0002] With the rapid development and maturity of electric vehicles, the pursuit of thermal safety and integration of battery systems is getting higher and higher. As a result, in the existing electric vehicle battery-related technologies, most of the battery systems of electric vehicles are arranged on the chassis. Due to the large volume of the battery system itself, in order to increase the ground clearance of the vehicle and meet the needs of lightweight development of the vehicle, the cold plate is designed as a multi-layer structure in the prior art, and the top area of ​​the cold plate is directly used as at least a part of the body floor panel, so as to realize the integration of the battery pack and the body. However, in this multi-layer cold plate structure, each plate layer is provided with a mounting hole for connection with the battery pack tray, which may lead to a large cumulative error in the hole position, which not only increases the production cost but also increases the difficulty of assembly. In addition, as a part of the body floor, the cold plate needs to bear a large load. The large cumulative error in the hole position may cause cracks or fractures in some weak parts of the battery pack, posing a safety hazard. Utility Model Content

[0003] The technical problem to be solved by the first aspect of the utility model is to provide a battery cold plate structure with small hole position cumulative error and low cost.

[0004] The technical problem to be solved by the second aspect of the utility model is to provide a battery assembly with a stable structure and light weight.

[0005] The technical problem to be solved by the third aspect of the utility model is to provide a vehicle which meets the requirements of lightweight.

[0006] In order to solve the above technical problems, the utility model provides a battery cold plate structure, including a sealing plate, a sealing ring, a flow channel plate and a DC plate arranged in sequence from top to bottom, the sealing plate and the sealing ring form a step surface with the flow channel plate and the DC plate on the YZ plane, and corresponding mounting holes are provided on the flow channel plate and the DC plate in the step surface area for connecting with the tray.

[0007] Preferably, the X and Y dimensions of the sealing plate are smaller than the X and Y dimensions of the flow channel plate and the DC plate, the X and Y dimensions of the sealing ring are smaller than the X and Y dimensions of the flow channel plate and the DC plate, and the sealing ring surrounds and abuts against the outer peripheral surface of the flow channel area of ​​the flow channel plate.

[0008] More preferably, the dimension of the sealing ring in the Z direction is the same as the height of the protrusion of the flow channel of the flow channel plate.

[0009] Preferably, the upper surface of the sealing plate is provided with sealing foam, and the sealing ring is suitable for supporting the sealing foam.

[0010] More preferably, the sealing plate is formed into an annular structure having a cavity, the outer shape structure of the cavity is similar to the outer shape structure of the sealing foam, and the sealing foam is arranged on the outer peripheral surface of the cavity.

[0011] Preferably, the flow channel plate and the DC plate are sealed together to form a cavity, the cavity contains a cooling medium, and a heat conducting element is provided between the DC plate and the battery cell module, and the cooling medium exchanges heat with the battery cell module via the DC plate and the heat conducting element.

[0012] Preferably, sealant is provided on the contact surface between the DC plate and the tray.

[0013] Preferably, the sealing plate, the sealing ring, the flow channel plate and the DC plate are welded integrally.

[0014] The utility model also provides a battery assembly, which includes a tray, a battery cell module and the above-mentioned battery cold plate structure, wherein the battery cell module is placed in the tray, and the tray is connected to the battery cold plate structure.

[0015] In addition, the utility model provides a vehicle, which includes the above-mentioned battery assembly.

[0016] The battery cold plate structure of the utility model only has mounting holes on the flow channel plate and the DC plate for connection with the tray, and the resulting cumulative error of the hole positions is small, thereby ensuring the accuracy and efficiency of the installation of the battery cold plate structure and the tray, and can also effectively avoid the large inclination of the battery cold plate structure after installation due to the large cumulative error of the hole positions, thereby affecting the further installation accuracy and quality of the sealing component with the vehicle body; the sealing plate and the sealing ring do not have additional process steps for processing the mounting holes, thereby improving production efficiency and reducing production costs.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation to the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of the installation relationship between the battery cold plate structure and the vehicle body sealing assembly and the tray of the utility model;

[0020] Figure 2 This is a structural exploded view of a specific implementation of the battery cold plate structure of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a specific implementation of the flow channel plate and the sealing ring of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a specific implementation of the connection between the battery cold plate structure and the tray of the utility model;

[0023] Figure 5 It is a structural schematic diagram of another specific implementation manner of the battery cold plate structure of the utility model.

[0024] Description of Reference Numerals

[0025] 1-sealing plate, 2-sealing ring, 3-flow channel plate, 4-DC plate, 5-sealing foam, 6-body sealing frame, 7-tray, 8-step surface, 9-fastener. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation modes described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the specific implementation modes described below.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" 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 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.

[0028] In the description of the present invention, some directional words are involved to clearly illustrate the technical solution of the present invention. For example, "up, down, left, and right" are the meanings of the directions normally indicated when the battery cold plate structure is assembled in a car by analogy. "Outside" refers to the direction from the battery cold plate structure to the outside of the car, and "inside" refers to the direction from the outside of the car to the battery cold plate structure. It should be understood that the directional terms are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0030] refer to Figures 1 to 4The utility model provides a battery cold plate structure, including a sealing plate 1, a sealing ring 2, a flow channel plate 3 and a DC plate 4 arranged in sequence from top to bottom. The flow channel plate 3 can be made of aluminum alloy material, and its processing process can first punch out a thick plate of required thickness by a punching process, and then punch out a flow channel on the thick aluminum alloy plate, so that the flow channel plate 3 is formed with a flow channel portion and a mounting portion, and the flow channel portion is located in the middle of the flow channel plate 3. The structural strength of the flow channel portion is relatively high, and its top surface can meet the structural strength of the vehicle body floor panel. In a preferred case, the shape of the flow channel in the flow channel portion is rectangular, and can also be trapezoidal. The mounting portion is a plurality of mounting holes, and is located at the edges of the flow channel plate 3 so that the flow channel plate 3 can be fixed to the tray 7 by fasteners 9 such as bolts and nuts; the DC plate 4 can be made of aluminum alloy material, and the DC plate 4 is a flat plate structure, which can be directly punched and formed, and mounting holes are also opened one by one on the DC plate 4 at positions corresponding to the mounting portion of the flow channel plate 3, and the flow channel plate 3 and the DC plate 4 can be fixed to the tray 7 by fasteners 9 such as bolts and nuts; the sealing plate 1 is a flat plate structure, which can be directly punched and formed, and the processing technology is simple. The material of the sealing plate 1 can be aluminum alloy material, which is light in weight and has good welding performance and structural strength. The upper surface of the sealing plate 1 is used to support the vehicle body sealing component , so that it can be used as at least a part of the vehicle body floor panel, saving the gap between the traditional cold plate structure and the vehicle body floor, thereby increasing the ground clearance of the vehicle and canceling the original floor panel of the vehicle, which can not only meet the lightweight requirements of the whole vehicle, but also save the cost of the whole vehicle. A part of the lower surface of the sealing plate 1 is connected to the flow channel portion on the flow channel plate 3, and a part is connected to the sealing ring 2; the sealing ring 2 can also be made of aluminum alloy material, and the sealing ring 2 can be assembled and formed by a positioning structure after being processed in sections. The upper surface of the sealing ring 2 is connected to the sealing plate 1 to support the sealing plate 1, and the lower surface of the sealing ring 2 is connected to the flow channel plate 3, thereby realizing the sealing of the sealing plate 1 and the flow channel plate 3 on all sides through the sealing ring 2. Preferably, the left end faces of the sealing plate 1 and the sealing ring 2 are located on the same vertical plane, the left end faces of the flow channel plate 3 and the DC plate 4 are located on the same vertical plane, and on the YZ plane, the left end faces of the sealing plate 1 and the sealing ring 2 are not on the same plane as the left end faces of the flow channel plate 3 and the DC plate 4, and a step surface 8 is formed, and a plurality of one-to-one corresponding mounting holes are opened on the flow channel plate 3 and the DC plate 4 in the step surface 8 area for connecting with the tray 7.The battery cold plate structure of the utility model only has mounting holes on the flow channel plate 3 and the DC plate 4, and is connected to the tray 7 by fasteners 9. Compared with the prior art method of opening mounting holes on the sealing plate 1, the sealing ring 2, the flow channel plate 3 and the DC plate 4, and connecting them to the tray 7 by fasteners 9, it has the following four advantages: first, it reduces the cumulative error of the hole position, and ensures the accuracy and efficiency of the installation of the battery cold plate structure and the tray 7; second, it can reduce the gap between the battery cold plate structure and the tray 7, reduce friction and vibration, and thus improve the stability and safety of the connection; third, it can effectively avoid the battery cold plate structure having a large inclination after installation due to the large cumulative error of the hole position, thereby affecting the further installation accuracy and quality of the sealing structure with the vehicle body; fourth, the sealing plate 1 and the sealing ring 2 do not have additional process steps for processing the mounting holes, thereby improving production efficiency and reducing production costs.

[0031] In some embodiments, reference Figure 3 , the X and Y dimensions of the sealing plate 1 are smaller than the dimensions of the flow channel plate 3 and the DC plate 4 in the X and Y directions, and the X and Y dimensions of the sealing ring 2 are smaller than the dimensions of the flow channel plate 3 and the DC plate 4 in the X and Y directions. Therefore, the battery cold plate structure of the utility model has lower weight and lower cost. The sealing ring 2 is an annular structure that surrounds and rests on the outer peripheral surface of the flow channel area of ​​the flow channel plate 3, which can effectively prevent the leakage of the coolant in the flow channel. Exemplarily, the outer contours on the left and right sides of the sealing ring 2 are similar to the outer contours on the left and right sides of the flow channel portion of the flow channel plate 3, and an outwardly protruding annular structure is formed on the left side of the sealing ring 2 to accommodate the inlet and outlet of the flow channel; the outer contours on the upper and lower sides of the sealing ring 2 are similar to the outer contours on the upper and lower sides of the mounting portion of the flow channel plate 3.

[0032] In some embodiments, the size of the sealing ring 2 in the Z direction is the same as the raised height of the flow channel of the flow channel plate 3. Exemplarily, the thickness of the sealing plate 1 is not higher than 1mm, preferably 0.8mm, and the space occupied in the Z direction of the vehicle body is small. The thickness of the sealing ring 2 is 2.8-3mm, the thickness of the flow channel plate 3 is 1.2mm, the flow channel height is 2.8mm, and the thickness of the DC plate 4 is 1.2mm. The flow channel height of the flow channel plate 3 is designed to be 2.8mm, which can not only ensure the smooth flow of the coolant in the flow channel, but also effectively avoid the problem of reduced coolant flow rate and reduced cooling efficiency caused by the flow channel being too wide. The thickness of the sealing ring 2 is designed to be consistent with the raised height of the flow channel, which can ensure that the installed sealing plate 1 is parallel to the XY plane, thereby ensuring the stability of the vehicle body sealing assembly installation structure and the flatness of the vehicle body floor. The "vertical plane" in the above description is represented by a plane parallel to the XZ plane.

[0033] In some embodiments, the upper surface of the sealing plate 1 is used to support the vehicle body sealing assembly, which includes a sealing foam 5, which is arranged above the sealing plate 1. Since the flow channel on the flow channel plate 3 has a certain height, when the sealing plate 1 is placed on the flow channel plate 3, there is a certain gap between the flow channel plate 3 and a part of the sealing plate 1, and the sealing ring 2 is located in the gap, and a part of the sealing ring 2 can support the sealing foam 5. Therefore, when the vehicle body sealing frame 6 above the sealing foam 5 compresses the sealing foam 5 downward, the sealing foam 5 can ensure the compression amount under the support of the sealing ring 2; it can also ensure that during the compression process, the pressure distribution between the sealing plate 1 and the flow channel plate 3 is more uniform, preventing the sealing plate 1 or the flow channel plate 3 from being damaged due to excessive local pressure. In addition, the sealing ring 2 can also reduce the vibration and impact between the sealing plate 1 and the flow channel plate 3.

[0034] In some embodiments, the sealing plate 1 is formed into an annular structure with a cavity, so that the top of the flow channel plate 3 can be formed as at least a part of the vehicle body floor panel, the outer shape structure of the sealing plate 1 cavity is similar to the outer shape structure of the sealing foam 5, and the sealing foam 5 is arranged on the outer peripheral surface of the cavity, thereby forming an effective seal between the vehicle body sealing frame 6 and the sealing plate 1. It should be noted that the flow channel plate 3 has a high structural strength, and its top can meet the structural strength requirements of the vehicle body floor panel.

[0035] In some embodiments, the flow channel plate 3 and the DC plate 4 are sealed together to form a cavity, which is formed on the YZ plane as a plurality of protrusions extending in the Y direction. The cavity contains a cooling medium to absorb the heat generated by the battery cell module. Preferably, the cooling material may be a coolant or a refrigerant. A heat-conducting element is provided between the DC plate 4 and the battery cell module. Preferably, the heat-conducting element may be a thermally conductive adhesive, which can not only achieve sealing between the DC plate 4 and the battery cell module, but also transfer the heat generated by the battery cell module to the DC plate 4 through the thermally conductive adhesive, thereby performing heat exchange with the cooling medium to improve the heat dissipation capacity of the battery cell module.

[0036] In some embodiments, sealant is provided on the contact surface between the DC plate 4 and the tray 7 , thereby enhancing the sealing between the DC plate 4 and the tray 7 , preventing external dust or water vapor from entering the tray 7 and affecting the battery cell module in the tray 7 .

[0037] In some embodiments, the sealing plate 1, the sealing ring 2, the flow channel plate 3 and the DC plate 4 are welded together. For example, the sealing plate 1, the sealing ring 2, the flow channel plate 3 and the DC plate 4 can be welded together by brazing, and the gaps of the welds are filled after the solder with a melting point lower than the melting point of the welds (sealing plate 1, sealing ring 2, flow channel plate 3 and DC plate 4) is melted to form an integrated connection. Since the temperature during welding is lower than the melting point of the welds, the thermal deformation of the welds can be greatly reduced, and the dimensional accuracy of the welds can be ensured, thereby ensuring the sealing of the battery cold plate structure and the vehicle body.

[0038] As an embodiment of the present invention, refer to Figure 5 The battery cold plate structure in this embodiment includes a sealing plate 1, a flow channel plate 3 and a DC plate 4, and a flange is formed on the outer edge of the sealing plate 1. The flange is provided with mounting holes corresponding to the flow channel plate 3 and the DC plate 4 one by one. The sealing plate 1, the flow channel plate 3 and the DC plate 4 can be connected and fixed to the tray 7 by fasteners 9.

[0039] On the basis of the above embodiments, as an optimal embodiment of the utility model, the battery cold plate structure includes a sealing plate 1, a sealing ring 2, a flow channel plate 3 and a DC plate 4 arranged in sequence from top to bottom, and the sealing plate 1, the sealing ring 2, the flow channel plate 3 and the DC plate 4 are connected as one piece; the sealing plate 1 is used to support the vehicle body sealing assembly; the sealing ring 2 is used to support the sealing plate 1, and the size of the sealing ring 2 in the Z direction is the same as the convex height of the flow channel of the flow channel plate 3; the flow channel plate 4 and the DC plate 5 are sealed together to form a cavity, and the cavity is built-in There is cooling material, and a heat-conducting element is provided between the DC plate 5 and the battery cell module to realize heat exchange with the battery cell module; the X and Y dimensions of the sealing plate 1 and the sealing ring 2 are smaller than the X and Y dimensions of the flow channel plate 3 and the DC plate 4, and the sealing ring 2 surrounds and abuts against the outer peripheral surface of the flow channel area of ​​the flow channel plate 3, and the sealing plate 1 and the sealing ring 2 form a step surface 8 with the flow channel plate 3 and the DC plate 4 on the YZ plane, and a plurality of one-to-one corresponding mounting holes are opened on the flow channel plate 3 and the DC plate 4 in the step surface 8 area for connecting with the tray 7.

[0040] Through the above technical scheme, the battery cold plate structure provided by the first aspect of the utility model has a small cumulative error of the hole position when being installed with the tray 7, thereby ensuring the stability of the installation of the battery cold plate structure and the tray 7, and can also effectively avoid the battery cold plate structure having a large inclination after installation due to the large cumulative error of the hole position, thereby affecting the installation accuracy and quality of the battery cold plate structure with the vehicle body sealing structure; the sealing plate 1 and the sealing ring 2 do not have additional process steps for processing the installation holes, thereby improving the production efficiency and reducing the production cost; the thickness of the sealing ring 2 is designed to be consistent with the height of the protrusion of the flow channel, which can ensure that the sealing plate 1 after installation is parallel to the XY plane, thereby ensuring the stability of the vehicle body sealing assembly installation structure and the flatness of the vehicle body floor. The upper surface of the battery cold plate structure can be used as part of the floor panel of the vehicle body, replacing the original traditional floor of the vehicle body, saving the use of the Y-direction space of the vehicle body, increasing the ground clearance of the vehicle, improving the passability of the whole vehicle, and meeting the lightweight requirements of the whole vehicle, saving the cost of the whole vehicle.

[0041] The second aspect of the utility model provides a battery assembly, which includes a tray 7, a battery cell module and a battery cold plate structure in any of the above embodiments. The battery cell module is installed in the tray 7, and the tray 7 is connected and fixed to the battery cold plate structure. Therefore, it has all its beneficial effects and will not be described in detail here.

[0042] The third aspect of the present invention provides a vehicle, which includes the battery cold plate structure provided by the first aspect of the present invention or the battery assembly provided by the second aspect of the present invention, and has all the beneficial effects thereof, which will not be described in detail herein.

[0043] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0045] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A battery cold plate structure, characterized in that: The invention comprises a sealing plate (1), a sealing ring (2), a flow channel plate (3) and a direct current plate (4) which are arranged in sequence from top to bottom, wherein the sealing plate (1) and the sealing ring (2) form a step surface (8) with the flow channel plate (3) and the direct current plate (4) on a YZ plane, and corresponding mounting holes are provided on the flow channel plate (3) and the direct current plate (4) in the region of the step surface (8) for connection with a tray (7).

2. The battery cold plate structure according to claim 1, characterized in that: The dimensions of the sealing plate (1) in the X and Y directions are smaller than the dimensions of the flow channel plate (3) and the direct current plate (4) in the X and Y directions, the dimensions of the sealing ring (2) in the X and Y directions are smaller than the dimensions of the flow channel plate (3) and the direct current plate (4) in the X and Y directions, and the sealing ring (2) surrounds and abuts against the outer peripheral surface of the flow channel region of the flow channel plate (3).

3. The battery cold plate structure according to claim 2, characterized in that: The dimension of the sealing ring (2) in the Z direction is the same as the height of the protrusion of the flow channel of the flow channel plate (3).

4. The battery cold plate structure according to claim 1, characterized in that: The upper surface of the sealing flat plate (1) is provided with sealing foam (5), and the sealing ring (2) is suitable for supporting the sealing foam (5).

5. The battery cold plate structure according to claim 4, characterized in that: The sealing plate (1) is formed into an annular structure having a cavity, the outer shape structure of the cavity corresponds to the outer shape structure of the sealing foam (5), and the sealing foam (5) is arranged on the outer peripheral surface of the cavity.

6. The battery cold plate structure according to claim 1, characterized in that: The flow channel plate (3) and the DC plate (4) are sealed together to form a cavity, the cavity contains a cooling medium, and a heat-conducting element is provided between the DC plate (4) and the battery module, and the cooling medium exchanges heat with the battery module via the DC plate (4) and the heat-conducting element.

7. The battery cold plate structure according to claim 1, characterized in that: A sealant is provided on the contact surface between the DC plate (4) and the tray (7).

8. The battery cold plate structure according to claim 1, characterized in that: The sealing plate (1), the sealing ring (2), the flow channel plate (3) and the direct current plate (4) are welded as one piece.

9. A battery assembly, characterized in that: It comprises a tray (7), a battery cell module and the battery cold plate structure according to any one of claims 1 to 8, wherein the battery cell module is placed in the tray (7), and the tray (7) is connected to the battery cold plate structure.

10. A vehicle, characterized in that: A battery assembly comprising the battery assembly of claim 9.

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