Integrated heating water cooling plate, battery pack and engineering machinery

Abstract

The utility model discloses an integrated heating water-cooling plate, a battery pack and engineering machinery. The water-cooling plate comprises a plate body, a cover plate connected with the plate body in a sealing manner, and fins mounted between the plate body and the cover plate, each fin is of a square-wave-shaped structure and comprises a liquid inlet section, a liquid outlet section and a communicating section. A middle clapboard is arranged in the middle of the plate body; a liquid inlet section mounting part and a liquid outlet section mounting part are arranged on the two sides of the middle partition plate respectively, and a communicating section mounting part is arranged at the rear end of the middle partition plate; flow channels are formed between adjacent wave crests of the fins, the cover plate, between adjacent wave troughs and the plate body; the flow channels of the liquid inlet section are in one-to-one correspondence with the flow channels of the liquid outlet section, and the communicating section is provided with communicating section flow channels communicating with the corresponding flow channels; and the plate body is also provided with conductive terminals which are respectively connected with the liquid inlet section and the liquid outlet section. According to the integrated heating water cooling plate, the battery pack and the engineering machinery disclosed by the utility model, the fins are used as heating elements to directly heat liquid in the runners, so that the heating elements do not need to be added, and the space utilization rate can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management of battery packs, and in particular to a water-cooled plate with integrated heating, a battery pack and engineering machinery. Background Art

[0002] There are two main types of existing battery thermal management technologies: the first is liquid cooling combined with heating film, where the battery pack dissipates heat through a liquid cooling plate and is heated through a PI heating film; the second is liquid cooling combined with PTC, where heat is dissipated through a liquid cooling plate and the battery is heated through a PTC on the liquid cooling plate or outside the battery. Both of the above heating methods have defects. Heating with a heating film has the risk of dry burning, which can easily cause thermal runaway of the battery. PTC heating requires the addition of PTC components externally, which increases the size of the battery pack and causes insufficient installation space.

[0003] At present, in the existing technology of PTC heating, in order to solve the problem of space occupied by PTC components, some technical solutions have been used to install the PTC heating part to the outer wall of the liquid cooling plate or the inside of the liquid cooling plate. For example, Chinese patent CN220527057U discloses a battery pack lower box and a battery pack, and Chinese patent CN214957070U discloses a battery pack heat exchange device and a battery system. The above-mentioned existing technologies all install the heating component in the flow channel. The defects of this type of structure are: on the one hand, it is necessary to increase the heating element, increase the size of the battery pack or reduce the volume of the fluid channel, increase the fluid resistance, affect the flow rate and flow direction, and have low heating or cooling efficiency. On the other hand, it is not easy to lay the conductive line for heating. The conductive line needs to pass through the plate body, which is easy to cause leakage of the liquid cooling plate.

[0004] For another example, Chinese patent CN214378594U discloses a hot and cold integrated liquid cooling plate, which includes an upper plate, a lower flow channel plate is arranged under the upper plate, the gap between the lower flow channel plate and the upper plate constitutes a closed serpentine flow channel, and the top of the upper plate is provided with a water inlet and a water outlet at both ends of the serpentine flow channel, respectively. Cold water enters the flow channel from the water inlet, and water is discharged from the water outlet to achieve circulating liquid cooling; two PTC heating cores are arranged at the interval of the serpentine flow channel at the bottom of the upper plate; the sides of the two PTC heating cores are connected with connecting wires, and the two connecting wires are connected to the power terminals for power connection. This type of prior art installs the heating element between the two flow channels, which increases the size of the battery pack, and heats the liquid in the liquid cooling plate through heat conduction from the shell, resulting in low heating efficiency of the battery pack. Utility Model Content

[0005] In view of the above problems, the utility model provides a water-cooled plate, a battery pack and engineering machinery with integrated heating, aiming to solve the problems in the prior art that the water-cooled plate with heating function needs to add a heating element, which affects the flow of liquid, has low heating or cooling efficiency, is difficult to lay conductive lines for heating, and the heating element increases the size of the battery pack.

[0006] The utility model adopts the following technical solutions to achieve the above purpose:

[0007] A water-cooled plate with integrated heating, comprising a plate body, a cover plate sealed with the plate body, and fins installed between the plate body and the cover plate; the fins are of a square wave structure, comprising a liquid inlet section, a liquid outlet section and a connecting section; a middle partition is provided in the middle of the plate body; a liquid inlet section mounting portion and a liquid outlet section mounting portion are respectively provided on both sides of the middle partition, and a connecting section mounting portion is provided at the rear end of the middle partition; the liquid inlet section mounting portion is also provided with a liquid inlet connected to the liquid inlet section, and the liquid outlet section mounting portion is also provided with a liquid outlet connected to the liquid outlet section; flow channels are formed between adjacent wave crests of the fin and the cover plate, and between adjacent wave troughs and the plate body; the flow channel of the liquid inlet section corresponds one-to-one to the flow channel of the liquid outlet section, and the connecting section is provided with a connecting section flow channel connected to the corresponding flow channels; the plate body is also provided with conductive terminals respectively connected to the liquid inlet section and the liquid outlet section, for forming a conductive circuit with the fins.

[0008] In the present technical solution, the liquid inlet section, the connecting section and the liquid outlet section in the fin form a plurality of groups of one-to-one corresponding flow channels, and the corresponding flow channels constitute a "U"-shaped structure flow channel with the liquid inlet and the liquid outlet connected at both ends, and the flow direction is: the liquid enters the water cooling plate from the liquid inlet, is divided at the front end of the liquid inlet section, and flows along the liquid inlet section flow channel, the connecting section flow channel and the liquid outlet section flow channel, and converges at the front end of the liquid outlet section to flow to the liquid outlet. Compared with the serpentine flow channel structure in the prior art, the flow channel structure of the present technical solution has a faster liquid flow rate in the flow channel, which can improve the cooling or heating efficiency; the conductive terminal and the fin form a conductive loop that can be used to heat the fin, that is, the fin in the liquid cooling plate It can not only serve as a flow channel for coolant, but also as a heating element for liquid. There is no need to add heating components such as PTC and heating film to the original cooling plate, and it does not affect the flow of fluid in the flow channel. The fins can directly heat the liquid in the flow channel, and there is no risk of dry burning, nor does it require the large space required by PTC. Safety is increased while the number of parts is reduced, increasing space utilization. In terms of the laying of wire lines in this technical solution, the conductive terminals are led out of the board body after insulation coupling treatment, and are connected to the positive and negative output terminals of the powered equipment through wires to form a conductive loop. The conductive line is simple and easy to lay.

[0009] A further technical solution is that the liquid inlet section and the liquid outlet section of the fin are symmetrically arranged along the middle partition. In this technical solution, the symmetrically arranged structure can improve the balance of battery thermal management.

[0010] A further technical solution is that the fins are copper sheets, and copper fins can improve thermal conductivity.

[0011] A further technical solution is that the fin is an integrally formed structure.

[0012] A battery pack comprises a battery unit and the above-mentioned water cooling plate, wherein the water cooling plate is arranged below the battery unit.

[0013] An engineering machine comprises the above-mentioned battery pack, wherein the battery pack is used to provide power for the engineering machine.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a water-cooled plate, battery pack and engineering machinery with integrated heating, which adopt fins with multiple "U"-shaped structural flow channels to improve cooling or heating efficiency. When the battery needs to be heated, the fins cooperate with conductive terminals, wires and energized equipment to form a conductive loop, and the fins are used as heating elements to directly heat the liquid in the flow channel. There is no need to add heating components such as PTC and heating film to the original cooling plate, and the flow of the fluid in the flow channel is not affected. There is no risk of dry burning during heating, and there is no large space size required by PTC. Safety is increased while the number of components is reduced, thereby increasing space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : A schematic structural diagram of the water cooling plate of the utility model.

[0017] Figure 2 : A schematic diagram of the structure of the plate body of the utility model.

[0018] Figure 3 : A schematic structural diagram of the front end of the plate body of the utility model.

[0019] In the figure:

[0020] 1. Plate body; 10. Middle partition; 11. Liquid inlet; 12. Liquid outlet; 13. First conductive terminal; 14. Second conductive terminal; 2. Cover plate; 31. Liquid inlet section; 32. Liquid outlet section; 33. Connecting section; 41. First conductive wire; 42. Second conductive wire; 51. Wave crest; 52. Wave trough. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1 to 3 The present invention is described in detail with specific implementation modes. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0022] like Figures 1 to 3As shown, the present embodiment provides a water-cooled plate with integrated heating, comprising a plate body 1, a cover plate 2 sealed with the plate body 1, and fins installed between the plate body 1 and the cover plate 2; the fins are of a square wave structure, comprising a liquid inlet section 31, a liquid outlet section 32 and a connecting section 33; a middle partition 10 is provided in the middle of the plate body 1; a liquid inlet section mounting portion and a liquid outlet section mounting portion are respectively provided on both sides of the middle partition 10, and a connecting section mounting portion is provided at the rear end of the middle partition 10; the liquid inlet section mounting portion is also provided with a liquid inlet 11 connected to the liquid inlet section, and the liquid outlet section mounting portion is also provided with a liquid outlet 12 connected to the liquid outlet section; flow channels are formed between adjacent wave crests of the fin and the cover plate, and between adjacent wave troughs and the plate body; the flow channel of the liquid inlet section corresponds one-to-one to the flow channel of the liquid outlet section, and the connecting section is provided with a connecting section flow channel connected to the corresponding flow channels; conductive terminals connected to the liquid inlet section and the liquid outlet section are also provided on both sides of the front end of the plate body 1, respectively, for forming a conductive circuit with the fins.

[0023] Specifically, the fins are formed by extruding an integrally formed copper sheet, and the fin structure of the liquid inlet section 31 and the liquid outlet section 32 is specifically a square wave structure in a cross section perpendicular to the middle partition 10, that is, a flow channel along the axial direction of the partition 10 is formed, and the fin structure of the connecting section 33 is specifically a square wave structure in a cross section along the axial direction of the middle partition 10, that is, a flow channel perpendicular to the axial direction of the partition 10 is formed, wherein the square wave structure includes a plurality of sequentially connected crests 51 and troughs 52, and the number of crests 51 and troughs 52 can be determined according to specific flow channel width, height and other parameters, which are not limited here, such as Figure 3 As shown, taking the liquid inlet section 31 as an example, the space between the adjacent wave crests 51 and the cover plate 2, the space between the adjacent wave troughs 42 and the plate body 1 all enclose a liquid inlet section flow channel for liquid circulation, the liquid outlet section 32 adopts the same structure and is provided with a liquid outlet section flow channel corresponding to the liquid inlet section flow channel one by one, and the connecting section adopts the same structure and is provided with a connecting section flow channel connecting the corresponding liquid inlet section flow channel and the liquid outlet section flow channel, forming a "U"-shaped structure flow channel with the two ends connecting the liquid inlet port 11 and the liquid outlet port 12; the liquid inlet section mounting portion and the liquid outlet section mounting portion are specifically used for mounting The middle partition 10 is a portion between two grooves for installing the corresponding fin sections. A groove for installing the connecting section 33 is provided between the rear end of the middle partition 10 and the rear end wall of the plate body. Since the connecting section 33 is used to connect the flow channels corresponding to the liquid inlet section 31 and the liquid outlet section 32, the two sides of the connecting section installation part are respectively connected to the liquid inlet section installation part and the liquid outlet section installation part; the first conductive terminal 13 and the second conductive terminal 14 conductively connected to the liquid inlet section 31 and the liquid outlet section 32 are also provided on both sides of the front end of the plate body 1, respectively, for forming a conductive circuit with the fins.

[0024] In this embodiment, the liquid inlet section 31, the connecting section 32 and the liquid outlet section 33 in the fin form a plurality of groups of one-to-one corresponding flow channels, and the corresponding flow channels constitute a "U"-shaped structure flow channel with the liquid inlet and the liquid outlet connected at both ends, and the flow direction is: the liquid enters the water cooling plate from the liquid inlet 11, is divided at the front end of the liquid inlet section 31, and flows along the liquid inlet section flow channel, the connecting section flow channel and the liquid outlet section flow channel, and converges at the front end of the liquid outlet section 32 to flow to the liquid outlet 12. Compared with the serpentine flow channel structure in the prior art, the flow channel structure has a faster liquid flow rate in the flow channel, which can improve the cooling or heating efficiency; the first conductive terminal 13 and the second conductive terminal 14 form a conductive loop with the fin and can be used to heat the fin, that is, the fin in the liquid cooling plate The fins can not only serve as a flow channel for the coolant, but also as a heating element for the liquid. There is no need to add heating components such as PTC and heating film to the original cooling plate, and the flow of the fluid in the flow channel is not affected. The fins can directly heat the liquid in the flow channel, without the risk of dry burning, and do not require the large space required by PTC. The safety is increased while the number of parts is reduced, thereby increasing space utilization. In terms of laying of wire lines, the first conductive terminal 13 and the second conductive terminal 14 are led out of the plate body 1 after insulation coupling treatment, and are connected to the positive and negative output terminals of the powered device through the first wire 41 and the second wire 42 to form a conductive loop. The conductive line is simple and easy to lay.

[0025] The above-mentioned embodiments exemplarily show the specific schemes such as the overall structure, preparation materials, and positions of conductive terminals of the fins. In other embodiments or practical applications, the fins may also adopt a split structure. For example, the liquid inlet section 31 and the liquid outlet section 32 are respectively welded to the two sides of the connecting section 33 to form a completed "U"-shaped flow channel. In terms of material, stainless steel, aluminum and other metals may also be used instead. The first conductive terminal 13 and the second conductive terminal 14 may also be arranged at other positions of the plate body 1 and led out of the plate body 1 after insulation coupling treatment.

[0026] In another embodiment, based on the above embodiment, in order to further improve the balance of battery thermal management, the liquid inlet section 31 and the liquid outlet section 32 of the fin are symmetrically arranged along the middle separator 10 .

[0027] Another embodiment provides a battery pack, including a battery cell and the water cooling plate of the above embodiment, wherein the water cooling plate is arranged below the battery cell.

[0028] Another embodiment, based on the above embodiment, provides a construction machine, comprising the battery pack of the above embodiment, wherein the battery pack is used to provide power for the construction machine.

[0029] The utility model provides a water-cooled plate, battery pack and engineering machinery with integrated heating, which adopt fins with multiple "U"-shaped structural flow channels to improve cooling or heating efficiency. When the battery needs to be heated, the fins cooperate with conductive terminals, wires and energized equipment to form a conductive loop, and the fins are used as heating elements to directly heat the liquid in the flow channel. There is no need to add heating components such as PTC and heating film to the original cooling plate, and the flow of the fluid in the flow channel is not affected. There is no risk of dry burning during heating, and there is no large space size required by PTC. Safety is increased while the number of components is reduced, thereby increasing space utilization.

Claims

1. A water-cooled plate with integrated heating, characterized in that: It includes a plate body, a cover plate sealed with the plate body, and fins installed between the plate body and the cover plate; The fin is a square wave structure, including a liquid inlet section, a liquid outlet section and a connecting section; A middle partition is provided in the middle of the plate body; a liquid inlet section mounting portion and a liquid outlet section mounting portion are respectively provided on both sides of the middle partition, and a connecting section mounting portion is provided at the rear end of the middle partition; the liquid inlet section mounting portion is also provided with a liquid inlet connected to the liquid inlet section, and the liquid outlet section mounting portion is also provided with a liquid outlet connected to the liquid outlet section; Flow channels are formed between adjacent wave crests of the fin and the cover plate, and between adjacent wave troughs and the plate body; the flow channels of the liquid inlet section correspond to the flow channels of the liquid outlet section one by one, and the connecting section is provided with a connecting section flow channel connecting the corresponding flow channels; The plate body is also provided with conductive terminals respectively connected to the liquid inlet section and the liquid outlet section, and used to form a conductive loop with the fins.

2. The water-cooled plate with integrated heating according to claim 1, characterized in that: The liquid inlet section and the liquid outlet section of the fin are symmetrically arranged along the middle partition.

3. The water-cooled plate with integrated heating according to claim 1, characterized in that: The fins are copper sheets.

4. The water-cooled plate with integrated heating according to claim 1, characterized in that: The fin is an integrally formed structure.

5. A battery pack, characterized in that: It comprises a battery unit and the water cooling plate according to any one of claims 1 to 4, wherein the water cooling plate is arranged below the battery unit.

6. An engineering machine, characterized in that: The battery pack comprises the battery pack as claimed in claim 5, wherein the battery pack is used to provide power for engineering machinery.

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