Water gap structure, liquid cooling plate and battery pack

Abstract

The utility model provides a water gap structure, a liquid cooling plate and a battery pack, the water gap structure comprises a first joint, a second joint and an adjusting part, the first connector is provided with a first connector and a second connector, the second connector is provided with a third connector and a fourth connector, and the adjusting part is rotationally connected between the first connector and the second connector and provided with two first channels and two second channels. The adjusting part has a first state and a second state which are mutually switched due to self rotation, in the first state, one first channel is communicated with the first interface and the third interface, and the other first channel is communicated with the second interface and the fourth interface; in the second state, one second channel communicates with the first connector and the fourth connector, and the other second channel communicates with the second connector and the third connector. According to the water gap structure, the flow direction of a liquid medium in the liquid cooling plate can be changed, so that the liquid cooling plate has a better heat exchange effect under different conditions, and the use quality is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling plates, and particularly relates to a water inlet and outlet structure. The utility model also relates to a liquid cooling plate provided with the above water inlet and outlet structure, and a battery pack provided with the liquid cooling plate. Background Art

[0002] With the continuous development of the new energy industry nowadays, the battery pack, as an important energy storage device, is the research focus of major manufacturers. The heat dissipation of the battery pack usually uses a liquid cooling plate for heat dissipation, and the liquid cooling plate can absorb the heat generated by the battery pack during charging and discharging. However, in cold winter, the low temperature environment will significantly affect the chemical reaction rate inside the battery, resulting in a decrease in the discharge efficiency of the battery pack and a shortening of the cruising range.

[0003] With the development of battery pack related technologies, there appears a liquid cooling plate that can not only cool the battery pack when it is at a high temperature, but also heat the battery pack when it is at a low temperature. By controlling the temperature of the liquid medium, the cooling or heating function of the liquid cooling plate for the battery pack is realized, enhancing the environmental adaptability of the battery pack.

[0004] The flow channel structure of the liquid cooling plate generally includes a middle part and a surrounding part. When the battery pack generates heat, the temperature in the middle is relatively high. Therefore, the flow direction of the liquid medium usually enters from the liquid inlet of the middle part of the liquid cooling plate, and after passing through the flow channel, flows out from the liquid outlet of the surrounding part of the liquid cooling plate. Such a setting is beneficial to improving the cooling efficiency and effect of the liquid cooling plate. However, when the battery pack needs to be heated in winter, the temperature around the battery pack is relatively low. At this time, the flow direction of the liquid medium in the way of first through the middle and then through the surrounding will cause uneven heating of the battery pack, with poor heating effect and affecting the use quality of the liquid cooling plate. Summary of the Utility Model

[0005] In view of this, the utility model aims to propose a water inlet and outlet structure to improve the use quality of the liquid cooling plate.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A water inlet and outlet structure includes:

[0008] A first joint, a second joint and an adjusting part;

[0009] The first joint is provided with a first interface and a second interface, the second joint is provided with a third interface and a fourth interface, and the adjusting part is rotatably connected between the first joint and the second joint and has two first channels and two second channels;

[0010] The adjusting part has a first state and a second state that are switched with each other due to its own rotation. In the first state, one of the first channels connects the first interface and the third interface, and the other first channel connects the second interface and the fourth interface; in the second state, one of the second channels connects the first interface and the fourth interface, and the other second channel connects the second interface and the third interface.

[0011] Furthermore, a rotating shaft is fixedly installed through the adjusting part, and both ends of the rotating shaft are respectively rotatably connected to the first joint and the second joint.

[0012] Furthermore, a fitting block is formed on the rotating shaft, and the fitting block is fitted on the adjusting part.

[0013] Furthermore, the projection of the fitting block on the adjusting part is in a "cross" shape.

[0014] Furthermore, the first interface is opposite to the third interface, the second interface is opposite to the fourth interface, and the first channel penetrates through the adjusting part along the axial direction of the rotating shaft of the adjusting part.

[0015] Furthermore, on one side of the first joint facing the adjusting part, depressions are respectively formed to form a first expansion groove communicating with the first interface and a second expansion groove communicating with the second interface. On one side of the second joint facing the adjusting part, depressions are respectively formed to form a third expansion groove communicating with the third interface and a fourth expansion groove communicating with the fourth interface. The second channel is in the shape of a long strip hole;

[0016] When the adjusting part is in the second state, the first expansion groove, one of the second channels, and the fourth expansion groove communicate to form a "C"-shaped first flow channel, and the second expansion groove, the other second channel, and the third expansion groove communicate to form a "C"-shaped second flow channel. The first flow channel and the second flow channel are arranged in an interleaved manner.

[0017] Furthermore, the first joint includes a first connecting part and a first fixing part that are fixedly connected to each other. The first interface and the second interface are arranged on the first connecting part, and the side walls of the first expansion groove and the second expansion groove are partially arranged on the first fixing part.

[0018] Furthermore, the second joint has the same structure as the first joint.

[0019] Compared with the prior art, the present utility model has the following advantages:

[0020] For the water inlet / outlet structure of the present utility model, when the flow channel structure inside the liquid cooling plate remains unchanged, it is arranged between the liquid inlet / outlet of the liquid cooling plate and the external liquid medium supply device. By providing a rotatable adjustment part, the flow direction of the liquid medium inside the liquid cooling plate can be changed, enabling the liquid medium to first enter the middle of the liquid cooling plate and then be discharged from the periphery of the liquid cooling plate when the battery pack needs to be cooled; when the battery pack needs to be heated, the liquid medium first enters the periphery of the liquid cooling plate and then is discharged from the middle of the liquid cooling plate, so that the liquid cooling plate can have better usage quality.

[0021] Secondly, by providing a rotating shaft on the adjustment part, the connection between the adjustment part and the first joint and the second joint can be made more concise and convenient for assembly. The rotating shaft is embedded with the adjustment part through an inlay block, which has good connection strength. At the same time, connection can be achieved without additional fasteners, and the operation is simple and convenient. The inlay block is set in a "cross" shape, which can form a tight connection between the inlay block and the adjustment part. When the adjustment part rotates relative to the first joint and the second joint, it is not easy for the inlay block and the adjustment part to be misaligned. Aligning the first interface with the third interface and the second interface with the fourth interface can enable a smaller first channel to be set on the adjustment part to achieve communication, improving the passing speed of the liquid medium.

[0022] Furthermore, by providing a first expansion slot, a second expansion slot, a third expansion slot, and a fourth expansion slot, and cooperating with the first channel and the second channel to form non-connected first and second flow channels, the flow direction change of the liquid medium inside the liquid cooling plate after the adjustment part switches states can be achieved. Setting the first joint as a split type can make the first expansion slot and the second expansion slot easier to process and form, and can reduce production costs. Setting the second joint to have the same structure as the first joint can enable the first joint and the second joint to be interchangeably used, while reducing the production cost of mold opening.

[0023] Another object of the present utility model is to provide a liquid cooling plate, and the liquid cooling plate is provided with the water inlet / outlet structure as described above.

[0024] For the liquid cooling plate of the present utility model, by adopting the above water inlet / outlet structure, the flow direction of the liquid medium inside the liquid cooling plate can be conveniently switched, enabling the liquid cooling plate to adopt different liquid medium flow directions at different ambient temperatures, and realizing efficient cooling and heating of the battery pack.

[0025] Another object of the present utility model is to provide a battery pack, and the battery pack is provided with the liquid cooling plate as described above.

[0026] The battery pack of the present utility model has the same beneficial effects as the above liquid cooling plate compared to the prior art, and will not be elaborated here. Description of the Drawings

[0027] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0028] Figure 1 is a schematic diagram of the water inlet structure according to the first embodiment of the present utility model;

[0029] Figure 2 is an exploded view of the water inlet structure according to the first embodiment of the present utility model;

[0030] Figure 3 is an exploded view of the adjusting part and the rotating shaft according to the first embodiment of the present utility model

[0031] Figure 4 is a schematic diagram of the flow direction of the liquid medium inside the water inlet structure when the adjusting part is in the second state according to the first embodiment of the present utility model;

[0032] Figure 5 is a schematic diagram of the fluid inside the water inlet structure when the adjusting part is in the second state according to the first embodiment of the present utility model;

[0033] Figure 6 is an exploded view of the first joint according to the first embodiment of the present utility model;

[0034] Figure 7 is a schematic diagram of the structure of the liquid cooling plate according to the second embodiment of the present utility model. <000>

[0035] Explanation of reference numerals:

[0036] 1, first joint;

[0037] 101, first connecting part; 102, first fixing part; 1a, first interface; 1b, second interface; 1c, first expansion slot; 1d, second expansion slot;

[0038] 2, second joint;

[0039] 201, second connecting part; 202, second fixing part; 2a, third interface; 2b, fourth interface; 2c, third expansion slot; 2d, fourth expansion slot;

[0040] 3, adjusting part;

[0041] 301, first channel; 302, second channel; 303, embedding hole;

[0042] 4, rotating shaft;

[0043] 401, embedding block;

[0044] 5, first fluid;

[0045] 6. Second fluid;

[0046] 7. Main body of the liquid cooling plate;

[0047] 8. Pipeline. Specific implementation manner

[0048] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0049] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0050] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" 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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0051] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0052] Embodiment 1

[0053] This embodiment relates to a water inlet and outlet structure to improve the use quality of the liquid cooling plate.

[0054] In terms of the overall structure, a water inlet and outlet structure in this embodiment includes a first joint, a second joint, and an adjustment part.

[0055] The first joint is provided with a first interface and a second interface, the second joint is provided with a third interface and a fourth interface, and the adjustment part is rotatably connected between the first joint and the second joint and has two first channels and two second channels.

[0056] The adjusting part has a first state and a second state that are switched with each other due to its own rotation. In the first state, one first channel connects the first interface and the third interface, and the other first channel connects the second interface and the fourth interface; in the second state, one second channel connects the first interface and the fourth interface, and the other second channel connects the second interface and the third interface.

[0057] With the above settings, the water inlet structure of this embodiment is arranged between the inlet and outlet of the liquid medium of the liquid cooling plate and the external liquid medium supply device. Without changing the flow channel structure inside the liquid cooling plate, by setting a rotatable adjusting part, the flow direction of the liquid medium inside the liquid cooling plate can be changed. When the battery pack needs to be cooled, the liquid medium first enters the middle of the liquid cooling plate and then is discharged from the periphery of the liquid cooling plate; when the battery pack needs to be heated, the liquid medium first enters the periphery of the liquid cooling plate and then is discharged from the middle of the liquid cooling plate, so that the liquid cooling plate can have better usage quality.

[0058] Based on the above overall introduction, referring to Figure 1 and Figure 2 As shown, specifically, the first joint 1 of this embodiment is arranged outside the battery pack and is used to connect the external liquid medium supply and circulation system, and the circulation line is connected through the first interface 1a and the second interface 1b. The second joint 2 is arranged inside the battery pack and connects the water inlet end and the water outlet end of the liquid cooling plate through the third interface 2a and the fourth interface 2b. When the adjusting part 3 is in the first state, the flow direction of the liquid medium in the water inlet structure is the first interface 1a - the third interface 2a and the second interface 1b - the fourth interface 2b; when the adjusting part 3 is in the second state, the flow direction of the liquid medium in the water inlet structure is the first interface 1a - the fourth interface 2b and the second interface 1b - the third interface 2a, realizing the switching of the corresponding relationship of each interface.

[0059] Regarding the specific rotatable structure of the adjusting part 3, referring to Figure 2 and Figure 3 As shown, a rotating shaft 4 is fixedly arranged through the adjusting part 3 of this embodiment, and both ends of the rotating shaft 4 are respectively rotatably connected to the first joint 1 and the second joint 2. By arranging the rotating shaft 4 on the adjusting part 3, the connection between the adjusting part 3 and the first joint 1 and the second joint 2 can be made more concise and convenient for assembly. The rotating shaft 4 and the adjusting part 3 can be pre-assembled before assembling the water inlet structure, which can improve the assembly efficiency.

[0060] Among them, an embedding block 401 is formed on the rotating shaft 4, and the embedding block 401 is embedded on the adjusting part 3. An embedding hole 303 is arranged on the adjusting part 3. The shape of the embedding hole 303 is the same as that of the embedding block 401, but the size is slightly smaller, so that the embedding block 401 is in an interference fit after being inserted into the embedding hole 303, and the adjusting part 3 and the rotating shaft 4 can be fixed without additional connecting parts. Of course, if the rotating shaft 4 is not provided with the embedding block 401, it can also be connected to the adjusting part 3 by integral molding or bonding, which can also provide a basis for rotational connection for the first joint 1 and the second joint 2.

[0061] Specifically, the projection of the embedding block 401 on the adjusting part 3 is a cross shape. The embedding block 401 is in a cross shape, and correspondingly, the embedding hole 303 is also in a cross shape. After the cross-shaped embedding block 401 is inserted into the embedding hole 303, the connection strength between the rotating shaft 4 and the adjusting part 3 can be higher. When the first joint 1 and the second joint 2 rotate on the rotating shaft 4, there is friction between them and the rotating shaft 4, so there will be torque between the rotating shaft 4 and the adjusting part 3. Using the cross-shaped embedding block 401 will not cause relative rotation with the adjusting part 3. It should be noted that the projection of the embedding block 401 on the adjusting part 3 can be any non-circular shape, which can play a role in preventing rotation between the embedding block 401 and the adjusting part 3.

[0062] As a preferred implementation form, in this embodiment, the first joint 1, the second joint 2 and the adjusting part 3 are all cylindrical and are coaxially connected. Such a setting can make the nozzle structure more compact and occupy less space. Specifically, the first interface 1a and the second interface 1b are axisymmetric about the center of the first joint 1, the third interface 2a and the fourth interface 2b are axisymmetric about the center of the second joint 2, and the adjusting part 3 can be rotated half a circle to realize the switching between the first state and the second state. A driving part can be set to drive the rotation of the adjusting part 3. The form of the driving part can be belt drive or gear drive, etc. During use, an external electric control signal is used to control the driving part. During the rotation of the adjusting part 3, it always maintains a sealed state with the first joint 1 and the second joint 2.

[0063] For the relative positional relationship between the first joint 1 and the second joint 2, refer to Figure 2 and Figure 4As shown, in this embodiment, the first interface 1a is facing the third interface 2a, the second interface 1b is facing the fourth interface 2b, and the first channel 301 penetrates through the adjusting part 3 along the direction of the rotating shaft 4 of the adjusting part 3. Aligning the first interface 1a with the third interface 2a and the second interface 1b with the fourth interface 2b can enable a smaller first channel 301 to be set on the adjusting part 3 to achieve connection, and when the liquid medium flows through, it is smoother, which can improve the passing speed of the liquid medium. It can be understood that the purpose of setting the first channel 301 is to connect the first interface 1a and the third interface 2a, and the second interface 1b and the fourth interface 2b. Therefore, the specific shape of the first channel 301 is not limited as long as the connection function can be achieved.

[0064] Meanwhile, on the side of the first joint 1 facing the adjusting part 3, depressions are respectively formed to form a first expansion groove 1c communicating with the first interface 1a and a second expansion groove 1d communicating with the second interface 1b. On the side of the second joint 2 facing the adjusting part 3, depressions are respectively formed to form a third expansion groove 2c communicating with the third interface 2a and a fourth expansion groove 2d communicating with the fourth interface 2b. The second channels 302 are in the shape of long holes. The first expansion groove 1c and the second expansion groove 1d extend and expand along the same rotation direction of the first joint 1, and the third expansion groove 2c and the fourth expansion groove 2d extend and expand along the same rotation direction of the second joint 2, so that the two second channels 302 can be separated and staggered.

[0065] With the above settings, referring to Figure 2 、 Figure 4 and Figure 5 As shown, when the adjusting part 3 is in the second state, the first expansion groove 1c, one second channel 302, and the fourth expansion groove 2d are connected to form a "C"-shaped first flow channel. After being connected to the first interface 1a and the second interface 1b and introducing a liquid medium, a first fluid 5 can be formed. The second expansion groove 1d, the other second channel 302, and the third expansion groove 2c are connected to form a "C"-shaped second flow channel. After being connected to the third interface 2a and the fourth interface 2b and introducing a liquid medium, a second fluid 6 can be formed. The first flow channel and the second flow channel are arranged in an interleaved manner, and the openings of the "C" shapes are facing each other.

[0066] Among them, the flow direction of the first fluid 5 is the first interface 1a - the first expansion groove 1c - the second channel 302 - the fourth expansion groove 2d - the fourth interface 2b, and the flow direction of the second fluid 6 is the second interface 1b - the second expansion groove 1d - the second channel 302 - the third expansion groove 2c - the third interface 2a. With such settings, the first fluid 5 and the second fluid 6 can be completely separated without overlapping parts.

[0067] Regarding the specific structure of the first joint 1, referring to Figure 2 and Figure 6As shown in the figure, the first joint 1 of this embodiment includes a first connecting portion 101 and a first fixing portion 102 that are fixedly connected to each other. The first interface 1a and the second interface 1b are provided on the first connecting portion 101. The side wall portions of the first expansion slot 1c and the second expansion slot 1d are provided on the first fixing portion 102, and the bottom of the slot is the side wall of the first connecting portion 101. With such a setting, both the first connecting portion 101 and the first fixing portion 102 have a straight hole structure, which can make the first joint 1 easier to process and form, and reduce the production cost.

[0068] As a further optimization of the water inlet and outlet structure, the second joint 2 of this embodiment has the same structure as the first joint 1. Correspondingly, the second joint 2 includes a second connecting portion 201 and a second fixing portion 202. The second connecting portion 201 has the same structure as the first connecting portion 101. The second fixing portion 202 has the same structure as the first fixing portion 102, so that when the first joint 1 and the second joint 2 are produced, the same set of molds can be shared, reducing the production cost. When assembling the water inlet and outlet structure, the first joint 1 and the second joint 2 do not need to be distinguished and can be directly assembled, simplifying the assembly process.

[0069] In the water inlet and outlet structure of this embodiment, by rotating the adjusting portion 3 by half a turn, the switching between its first state and the second state can be realized, and then the use of the first channel 301 and the second channel 302 in the water inlet and outlet structure can be switched, enabling the flow direction of the liquid medium in the liquid cooling plate to be changed. When the battery pack needs to be cooled, the liquid medium first enters the middle of the liquid cooling plate and then is discharged from the periphery of the liquid cooling plate; when the battery pack needs to be heated, rotate the adjusting portion 3, and the liquid medium can first enter the periphery of the liquid cooling plate and then be discharged from the middle of the liquid cooling plate, so that the liquid cooling plate can have a better heat exchange effect on the battery pack both during cooling and heating.

[0070] Embodiment Two

[0071] This embodiment relates to a liquid cooling plate provided with the water inlet and outlet structure in Embodiment One.

[0072] Specifically, referring to Figure 7 As shown in the figure, the liquid cooling plate further includes a liquid cooling plate body 7 and pipelines 8. There are two pipelines 8, which are respectively connected to the middle flow channel and the peripheral flow channel of the liquid cooling plate body 7. The third interface 2a and the fourth interface 2b of the water inlet and outlet structure are respectively connected to one pipeline 8, and the supply and circulation of the liquid medium in the liquid cooling plate body 7 can be realized through the water inlet and outlet structure.

[0073] In specific implementation, when liquid cooling plates are needed for cooling, the liquid medium first enters the middle flow channels of the liquid cooling plate body 7 and then flows out from the peripheral flow channels of the liquid cooling plate body 7, which can have a better heat absorption effect on the relatively high-temperature part in the middle of the battery pack; when liquid cooling plates are needed for heating, the liquid medium first enters the peripheral flow channels of the liquid cooling plate body 7 and then flows out from the middle flow channels of the liquid cooling plate body 7, which can have a better heating effect on the relatively low-temperature parts at the edges of the battery pack. Compared with the prior art, the use quality of the liquid cooling plates is improved.

[0074] Embodiment III

[0075] This embodiment relates to a battery pack provided with the liquid cooling plates in Embodiment II.

[0076] By providing the liquid cooling plates in Embodiment II, the battery pack in this embodiment can have good heat exchange effects both when cooling is needed and when heating is needed, making the thermal management ability of the battery pack stronger and improving the use quality of the battery pack.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A nozzle structure, characterized in that, Comprising: A first joint, a second joint and an adjusting part; The first joint is provided with a first interface and a second interface, the second joint is provided with a third interface and a fourth interface, the adjusting part is rotatably connected between the first joint and the second joint, and has two first channels and two second channels; The adjusting part has a first state and a second state that are switched with each other due to its own rotation. In the first state, one of the first channels communicates the first interface and the third interface, and the other first channel communicates the second interface and the fourth interface; in the second state, one of the second channels communicates the first interface and the fourth interface, and the other second channel communicates the second interface and the third interface.

2. The water inlet structure according to claim 1, characterized in that: A rotating shaft is fixedly arranged through the adjusting part, and both ends of the rotating shaft are rotatably connected to the first joint and the second joint respectively.

3. The water inlet structure according to claim 2, characterized in that: A fitting block is formed on the rotating shaft, and the fitting block is fitted on the adjusting part.

4. The water inlet structure according to claim 3, characterized in that: The projection of the fitting block on the adjusting part is a "cross" shape.

5. The water inlet structure according to any one of claims 1 to 4, characterized in that: The first interface is opposite to the third interface, the second interface is opposite to the fourth interface, and the first channel penetrates through the adjusting part along the direction of the rotating shaft of the adjusting part.

6. The water inlet structure according to claim 5, characterized in that: On one side of the first joint facing the adjusting part, a first expansion groove communicating with the first interface and a second expansion groove communicating with the second interface are respectively recessed. On one side of the second joint facing the adjusting part, a third expansion groove communicating with the third interface and a fourth expansion groove communicating with the fourth interface are respectively recessed. The second channel is in the shape of a long strip hole; When the adjusting part is in the second state, the first expansion groove, one of the second channels, and the fourth expansion groove communicate to form a "C"-shaped first flow channel, the second expansion groove, the other second channel, and the third expansion groove communicate to form a "C"-shaped second flow channel, and the first flow channel and the second flow channel are arranged in an alternating manner.

7. The water inlet structure according to claim 6, characterized in that: The first joint includes a first connecting part and a first fixing part that are fixedly connected to each other. The first interface and the second interface are arranged on the first connecting part, and the groove side walls of the first expansion groove and the second expansion groove are partially arranged on the first fixing part.

8. The water inlet structure according to claim 7, characterized in that: The second joint has the same structure as the first joint.

9. A liquid cooling plate, characterized in that: The liquid cooling plate is provided with the water inlet structure according to any one of claims 1 to 8.

10. A battery pack, characterized in that: The battery pack is provided with the liquid cooling plate according to claim 9.

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