Water cooling plate, lower box body of battery pack and battery pack

Abstract

The utility model discloses a water cooling plate, a lower box body of a battery pack and the battery pack, the water cooling plate comprises a water cooling plate body, the water cooling plate body is internally provided with a flow channel and a structural cavity, the flow channel and the structural cavity extend along the water cooling plate body and are isolated from each other, the water cooling plate body is provided with a water inlet and a water outlet, and the water inlet and the water outlet are communicated with each other. And the water inlet and the water outlet are respectively communicated with the flow channel. According to the embodiment of the invention, the runner and the structural cavity which are independent from each other are arranged, so that the strength of the structural cavity is reserved, the volume of the runner is reduced, and the purposes of reducing cost and weight are achieved.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, and in particular to a water-cooled plate, a lower housing of a battery pack, and a battery pack. Background Technology

[0002] A battery pack typically includes battery modules and a water-cooling plate. The battery modules are attached to the water-cooling plate, which has a structural cavity for introducing a cooling medium to facilitate heat exchange between the battery modules and the cooling plate. In existing technologies, the structural cavity within the water-cooling plate serves multiple purposes: introducing the cooling medium, reducing weight, and simultaneously enhancing the structural strength of the water-cooling plate. Consequently, the volume of this cavity is often relatively large, resulting in a larger volume of cooling medium and consequently increasing structural and operating costs. Utility Model Content

[0003] This utility model provides a water-cooled plate, a lower housing of a battery pack, and a battery pack.

[0004] The present invention adopts the following technical solution:

[0005] The primary objective of this disclosure is to provide a water-cooled plate, comprising: a water-cooled plate body, wherein a flow channel and a structural cavity are provided within the water-cooled plate body, the flow channel and the structural cavity both extend along the water-cooled plate body and are isolated from each other, and an inlet and an outlet are provided on the water-cooled plate body, the inlet and the outlet being respectively connected to the flow channel.

[0006] Optionally, the flow channel and the structural cavity are arranged sequentially along the thickness direction of the water-cooled plate body.

[0007] Optionally, the water-cooled plate body includes an upper plate, a lower plate, and a middle plate, which are connected to each other.

[0008] The upper plate and the lower plate are respectively disposed on both sides of the middle plate along the thickness direction, and the flow channel is formed between the upper plate and the middle plate, and the structural cavity is formed between the lower plate and the middle plate.

[0009] Optionally, the water-cooled plate includes multiple upper ribs and multiple lower ribs;

[0010] An upper cavity is formed between the upper plate and the middle plate, and a lower cavity is formed between the lower plate and the middle plate;

[0011] The upper partition is disposed in the upper cavity, and the upper partition is connected to the upper plate and the middle plate respectively. A flow channel with multiple bends is formed between the upper partition, the upper plate and the middle plate.

[0012] The lower partition rib is disposed in the lower cavity, and the lower partition rib is connected to the lower layer plate and the middle layer plate respectively.

[0013] Optionally, the upper and lower ribs are positioned one-to-one.

[0014] Optionally, the thickness of the middle layer is less than the thickness of the upper layer and the lower layer.

[0015] A second objective of this application is to provide a lower casing for a battery pack, comprising:

[0016] Water-cooled plate;

[0017] The side beam is connected to the water-cooled plate body. The side beam has an upper fixing part and a lower fixing part. The upper fixing part is used to connect and fix to the upper casing of the battery pack, and the lower fixing part is used to connect and fix to the bracket.

[0018] Optionally, the side beam and the water-cooled plate body are integrally formed.

[0019] The third objective of this application is to provide a battery pack, comprising:

[0020] The aforementioned lower housing;

[0021] An upper box body is provided on top of a lower box body, and an upper fixed part of the lower box body is connected to the upper box body, forming a cavity between the upper box body and the lower box body;

[0022] A battery module is disposed within the cavity and is attached to the water-cooling plate body.

[0023] Optionally, the flow channel is located on the side of the water-cooled plate body closer to the battery module, and the structural cavity is located on the side of the flow channel away from the battery module.

[0024] By adopting the above technical solution, this application has the following beneficial effects:

[0025] This application embodiment achieves cost reduction and weight reduction by setting up independent flow channels and structural cavities, which not only maintains the strength of the structural cavity but also reduces the flow channel volume.

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0028] Figure 1 A partial structural schematic diagram of the water-cooled plate provided in an embodiment of this application is shown;

[0029] Figure 2 This paper shows another partial structural schematic diagram of the water-cooled plate provided in an embodiment of this application.

[0030] In the figure: 1. Water-cooled plate body; 11. Flow channel; 12. Structural cavity; 13. Upper plate; 14. Middle plate; 15. Lower plate; 16. Upper rib; 17. Lower rib; 2. Side beam; 21. Upper fixing part; 22. Lower fixing part.

[0031] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] See Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a water-cooled plate, including: a water-cooled plate body 1, wherein a flow channel 11 and a structural cavity 12 are provided inside the water-cooled plate body 1, the flow channel 11 and the structural cavity 12 both extend along the water-cooled plate body 1, the flow channel 11 and the structural cavity 12 are isolated from each other, and a water inlet and a water outlet are provided on the water-cooled plate body 1, the water inlet and the water outlet respectively connecting to the flow channel 11. The cooling medium, such as cooling water, enters the flow channel 11 through the water inlet and exchanges heat with the battery module in contact with the water-cooled plate, and then flows out through the water outlet.

[0036] This application embodiment sets up mutually independent flow channels 11 and structural cavities 12, which not only retains the strength of the structural cavity 12 but also reduces the volume of the flow channels 11, thereby achieving the purpose of cost reduction and weight reduction.

[0037] In some possible implementations, the flow channel 11 and the structural cavity 12 may be located in the same plane, or they may be in different planes. For example, the flow channel 11 and the structural cavity 12 may be arranged sequentially along the thickness direction of the water-cooled plate body 1. The side of the water-cooled plate where the flow channel 11 is located can be used for direct contact with the battery module and for heat exchange with the battery module.

[0038] The spatial ratio between the flow channel 11 and the structural cavity 12 can be determined according to the actual situation, as long as it meets the flow resistance requirements of the corresponding project. The design of the structural cavity 12 further increases the structural strength of the water-cooled plate.

[0039] In some possible implementations, the water-cooled plate body 1 includes an upper plate 13, a lower plate 15, and a middle plate 14. The upper plate 13, the lower plate 15, and the middle plate 14 are connected. The upper plate 13 and the lower plate 15 are respectively disposed on both sides of the middle plate 14 along the thickness direction. The flow channel 11 is formed between the upper plate 13 and the middle plate 14, and the structural cavity 12 is formed between the lower plate 15 and the middle plate 14.

[0040] Specifically, the water-cooled plate includes multiple upper baffles 16 and multiple lower baffles 17. An upper cavity is formed between the upper plate 13 and the middle plate 14, and a lower cavity is formed between the lower plate 15 and the middle plate 14. The upper baffles 16 are disposed in the upper cavity and connect the upper plate 13 and the middle plate 14 respectively. A multi-bend flow channel 11 is formed between the upper baffles 16, the upper plate 13, and the middle plate 14. The lower baffles 17 are disposed in the lower cavity and connect the lower plate 15 and the middle plate 14 respectively.

[0041] It should be noted that the water-cooled plate of this application can be manufactured by extrusion process and can be an integrally formed aluminum extrusion.

[0042] In some possible implementations, the upper ribs 16 and the lower ribs 17 are not staggered, but are arranged opposite each other, thereby enhancing the overall structural strength of the water-cooled plate.

[0043] In some possible implementations, the thickness of the middle layer plate 14 is less than the thickness of the upper layer plate 13 and the lower layer plate 15. The upper layer plate 13 is used to connect to the battery module and also to directly support the weight of the battery module; therefore, thickening the upper layer plate 13 can avoid or reduce deformation of the water-cooling plate.

[0044] This application embodiment also provides a lower casing for a battery pack, including the aforementioned water-cooled plate and side beam 2. The side beam 2 is connected to the water-cooled plate body 1. The side beam 2 has an upper fixing part 21 and a lower fixing part 22. The upper fixing part 21 is used for connection and fixation to the upper casing of the battery pack, and the lower fixing part 22 is used for connection and fixation to a bracket. The upper fixing part 21 and the lower fixing part 22 can be connecting holes. The side beam 2 and the water-cooled plate body 1 can be integrally formed, and both can be a single piece formed by an extrusion process.

[0045] This application embodiment also provides a battery pack, including: a lower housing, an upper housing, and a battery module. The upper housing covers the lower housing, and the upper fixing part 21 of the lower housing is connected to the upper housing. A cavity is formed between the upper housing and the lower housing. The battery module is disposed in the cavity and is attached to the water-cooling plate body.

[0046] The flow channel 11 is located on the side of the water-cooled plate body 1 closest to the battery module, and the structural cavity 12 is located on the side of the flow channel 11 furthest from the battery module. Because the flow channel 11 is closer to the battery module, the cooling medium within the flow channel 11, such as cooling water, can fully exchange heat with the battery module, resulting in a significant cooling effect.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A water-cooled plate, characterized in that, include: The water-cooled plate body has a flow channel and a structural cavity inside it. The flow channel and the structural cavity both extend along the water-cooled plate body and are isolated from each other. The water-cooled plate body has an inlet and an outlet, which are respectively connected to the flow channel.

2. The water-cooled plate according to claim 1, characterized in that, The flow channel and the structural cavity are arranged sequentially along the thickness direction of the water-cooled plate body.

3. The water-cooled plate according to claim 1, characterized in that, The water-cooled plate body includes an upper plate, a lower plate, and a middle plate, which are connected to each other. The upper plate and the lower plate are respectively disposed on both sides of the middle plate along the thickness direction, and the flow channel is formed between the upper plate and the middle plate, and the structural cavity is formed between the lower plate and the middle plate.

4. The water-cooled plate according to claim 3, characterized in that, It includes multiple upper ribs and multiple lower ribs; An upper cavity is formed between the upper plate and the middle plate, and a lower cavity is formed between the lower plate and the middle plate; The upper partition is disposed in the upper cavity, and the upper partition is connected to the upper plate and the middle plate respectively. A flow channel with multiple bends is formed between the upper partition, the upper plate and the middle plate. The lower partition rib is disposed in the lower cavity, and the lower partition rib is connected to the lower layer plate and the middle layer plate respectively.

5. The water-cooled plate according to claim 4, characterized in that, The upper and lower ribs are aligned one-to-one.

6. The water-cooled plate according to any one of claims 3-5, characterized in that, The thickness of the middle layer is less than the thickness of the upper layer and the lower layer.

7. A lower casing for a battery pack, characterized in that, include: The water-cooled plate as described in any one of claims 1-6; The side beam is connected to the water-cooled plate body. The side beam has an upper fixing part and a lower fixing part. The upper fixing part is used to connect and fix to the upper casing of the battery pack, and the lower fixing part is used to connect and fix to the bracket.

8. The lower casing of the battery pack according to claim 7, characterized in that, The side beam and the water-cooled plate body are integrally formed.

9. A battery pack, characterized in that, include: The lower housing as described in claim 7 or 8; An upper box body is provided on top of a lower box body, and an upper fixed part of the lower box body is connected to the upper box body, forming a cavity between the upper box body and the lower box body; A battery module is disposed within the cavity and is attached to the water-cooling plate body.

10. The battery pack according to claim 9, characterized in that, The flow channel is located on the side of the water-cooled plate body closer to the battery module, and the structural cavity is located on the side of the flow channel away from the battery module.

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