Flow equalizing and liquid separating structure for energy storage device and liquid cooling device

Abstract

The utility model relates to a flow equalizing and liquid separating structure for an energy storage device and a liquid cooling device.The flow equalizing and liquid separating structure comprises a vertical liquid inlet mechanism and a vertical liquid return mechanism, the vertical liquid inlet mechanism comprises vertically-arranged liquid inlet manifolds and a plurality of liquid inlet connectors located on the single liquid inlet manifold, each liquid inlet connector is provided with at least one resistance part, and the resistance parts are connected with the vertical liquid inlet mechanism. And the number of the resistance pieces corresponding to the liquid inlet interface is increased along with the height reduction of the liquid inlet interface. Different numbers of resistance pieces capable of being spliced are installed in all liquid inlet connectors of the liquid inlet manifold, so that when liquid is supplied to a battery pack of the energy storage device through the vertical liquid inlet mechanism, the number of the resistance pieces meeting the cooling medium flow requirement can be selected according to the pressure difference corresponding to the height of the corresponding energy storage device, and the cooling medium flow requirement can be met by adjusting the flow resistance of the adjacent resistance pieces. The vertical liquid inlet mechanism can uniformly distribute the flow of the cooling medium to each layer of energy storage device, so that the flow of the cooling medium basically tends to be consistent, the heat dissipation effect of the liquid cooling device is ensured, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This application relates to the field of battery energy storage cooling technology, specifically to a liquid distribution structure and liquid cooling device for energy storage devices. Background Technology

[0002] In power storage systems, to save space, battery packs or energy storage boxes are typically stacked in multiple layers. In this structure, gravity causes lower-layer battery packs or energy storage boxes to experience greater static pressure, resulting in significantly higher coolant flow rates than upper layers. Traditionally, to improve flow uniformity, resistance is balanced by increasing pump power or adjusting the dimensions of the internal pipe channels. However, increasing pump power leads to an increase of over 30% in overall pressure drop and energy consumption, increasing costs. Furthermore, the design of the internal pipe channels directly affects flow distribution uniformity. Differences in pipe length, bend angle, and branching structures in different branches result in varying flow resistance, causing inconsistent coolant flow distribution. Fixed-channel pipe structures cannot adapt to energy storage systems with different numbers of layers or height differences. If the height of the energy storage system changes, the internal pipe channels must be redesigned, lacking versatility. Moreover, local channel narrowing easily leads to blockages, requiring disassembly of the entire pipe section for maintenance, making maintenance extremely inconvenient. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this application provides a liquid distribution structure and liquid cooling device for energy storage devices, specifically adopting the following technical solution:

[0004] A liquid distribution and equalization structure for an energy storage device includes a vertical liquid inlet mechanism and a vertical liquid return mechanism.

[0005] The vertical liquid inlet mechanism includes at least one vertically arranged liquid inlet manifold and multiple liquid inlet ports located on the single liquid inlet manifold. The multiple liquid inlet ports are arranged at intervals along the vertical direction of the liquid inlet manifold. Each liquid inlet port is connected to the liquid inlet of an energy storage device. Each liquid inlet port is provided with at least one resistance element for increasing the flow resistance of the pipeline. As the height of the liquid inlet port decreases, the number of resistance elements corresponding to the liquid inlet port increases.

[0006] The vertical return liquid mechanism includes at least one return liquid manifold and multiple return liquid interfaces located on the single return liquid manifold, with each return liquid interface connected to the liquid outlet of an energy storage device.

[0007] Optionally: The resistance element adopts a cylindrical structure, at least one end of the resistance element is provided with a receiving groove, the resistance element is provided with an axially penetrating liquid flow channel, and the liquid flow channel is eccentrically arranged relative to the central axis of the resistance element.

[0008] Optionally: at least one pair of positioning bosses are provided on the circumferential edge of one end of the resistance member, and at least one pair of positioning grooves that are adapted to the positioning bosses are provided on the circumferential edge of the opposite end of the resistance member.

[0009] Optional: When two or more resistance components are spliced ​​together, adjacent resistance components are circumferentially fixed by fitting positioning bosses and positioning grooves, and the liquid flow channels of adjacent resistance components are staggered around the connecting axis.

[0010] Optionally: One end of the resistance member is provided with two pairs of positioning bosses, each pair of positioning bosses is arranged symmetrically with respect to the central axis of the resistance member, and the two pairs of positioning bosses are set at a 90-degree angle.

[0011] Optionally: a connecting body is provided on the circumferential edge of one end of the resistance member, and a connecting groove for the connecting body is provided on the circumferential edge of the opposite end of the resistance member.

[0012] Optional: When two or more resistance components are spliced, adjacent resistance components are axially fixed by fitting together with connecting bodies and connecting grooves, while adjacent resistance components remain circumferentially movable.

[0013] Optional: The stagger angle of the liquid flow channels of adjacent resistance components ranges from 0 to 180 degrees.

[0014] Optional: Each resistance element has a sealing mechanism on its connecting body or connecting groove. When the connecting bodies and connecting grooves of adjacent resistance elements are connected, the sealing mechanism prevents liquid leakage.

[0015] In addition, this application also discloses a liquid cooling device for cooling and dissipating heat from an energy storage device. The liquid cooling device includes a cooling circulation mechanism and a flow equalization and distribution structure as described above. The cooling circulation mechanism is used to provide circulation power and re-cooling for the coolant. The flow equalization and distribution structure distributes the coolant to the energy storage device.

[0016] Beneficial effects

[0017] The technical solution of this application achieves the following beneficial effects:

[0018] (1) The liquid distribution structure of this application installs different numbers of splicable resistance components in each liquid inlet joint of the liquid inlet manifold in the vertical liquid inlet mechanism. When the liquid is supplied to the battery pack of the energy storage device through the vertical liquid inlet mechanism, the number of resistance components that meet the cooling medium flow requirements can be selected according to the pressure difference corresponding to the height of the corresponding energy storage device. By adjusting the flow resistance of adjacent resistance components, the vertical liquid inlet mechanism can evenly distribute the cooling medium flow to each layer of energy storage device, so that the flow of the cooling medium in each energy storage device is basically consistent, ensuring the heat dissipation effect of the battery pack in the liquid cooling device, and achieving the energy saving effect at the same time.

[0019] (2) In the liquid distribution structure of this application, by adjusting the resistance element configured in each liquid inlet connector, the liquid inlet flow rate of the corresponding liquid inlet connector can be controlled, thereby realizing the adjustment of the corresponding liquid inlet flow rate according to the power of the energy storage device (different heat dissipation requirements), and realizing targeted liquid inlet adjustment of the liquid cooling device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the liquid distribution and equalization structure of the liquid cooling device in the embodiments of this application.

[0021] Figure 2 This is a schematic diagram of the resistance component installation structure of the liquid inlet interface in Embodiment 1 of this application.

[0022] Figure 3 This is a schematic diagram of the splicing structure of the resistance component in Embodiment 1 of this application.

[0023] Figure 4 This is a schematic diagram of the overall structure of the resistance component in Embodiment 1 of this application.

[0024] Figure 5 This is a schematic diagram of the forward structure of the resistance element in Embodiment 1 of this application.

[0025] Figure 6 This is a side cross-sectional view of the resistance element in Embodiment 1 of this application.

[0026] Figure 7 This is a schematic diagram of the resistance component installation structure of the liquid inlet interface in Embodiment 2 of this application.

[0027] Figure 8 This is a schematic diagram of the splicing structure of the resistance component in Embodiment 2 of this application.

[0028] Figure 9 This is a schematic diagram of the overall structure of the resistance element in Embodiment 2 of this application.

[0029] Figure 10 This is a schematic diagram of the forward structure of the resistance element in Embodiment 2 of this application.

[0030] Figure 11 This is a side cross-sectional view of the resistance element in Embodiment 2 of this application.

[0031] The specific meanings of the reference numerals in the attached figures are as follows:

[0032] 1-Vertical liquid inlet mechanism; 101-Liquid inlet manifold; 102-Liquid inlet interface; 103-Resistance component; 1031-Positioning boss; 1032-Positioning groove; 1033-Receiving groove; 1034-Liquid flow channel; 1035-Connector; 1036-Connecting groove; 2-Vertical liquid return mechanism; 201-Liquid return manifold; 202-Liquid return interface; 3-Energy storage device; 4-Cooling circulation mechanism. Detailed Implementation

[0033] The present application will now be further described with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application and should not be construed as limiting the scope of protection of the present application. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present application.

[0034] Combination Figure 1 As shown in the embodiment, this application specifically discloses a flow equalization and distribution structure for an energy storage device. The flow equalization and distribution structure is part of a liquid cooling device, which can be used to cool and dissipate heat from the energy storage device 3. Specifically, in this embodiment, the liquid cooling device includes a cooling circulation mechanism 4 and a flow equalization and distribution structure. The cooling circulation mechanism 4 is used to provide circulation power and re-cooling for the coolant. The flow equalization and distribution structure distributes coolant to the energy storage device 3.

[0035] More specifically, the liquid distribution structure of this embodiment includes a vertical liquid inlet mechanism 1 and a vertical liquid return mechanism 2. The vertical liquid inlet mechanism 1 includes at least one vertically arranged liquid inlet manifold 101 and a plurality of liquid inlet ports 102 located on the single liquid inlet manifold 101. The plurality of liquid inlet ports 102 are arranged at intervals along the vertical direction of the liquid inlet manifold 101. Each liquid inlet port 102 is connected to the liquid inlet of an energy storage device 3. Each liquid inlet port 102 is provided with at least one resistance element 103 for increasing the flow resistance of the pipeline. As the height of the liquid inlet port 102 decreases, the number of resistance elements 103 corresponding to the liquid inlet port 102 increases.

[0036] The vertical return liquid mechanism 2 includes at least one return liquid manifold 201 and multiple return liquid interfaces 202 located on the single return liquid manifold 201. Each return liquid interface 202 is connected to the outlet of an energy storage device 3.

[0037] In this embodiment, a connectable resistance element 103 is added to each liquid inlet 102 to adjust the flow rate of coolant entering each energy storage device 3, thereby reducing flow rate differences and ensuring uniform flow rate distribution.

[0038] Example 1:

[0039] Combination Figure 1 As shown, this embodiment 1 specifically discloses a flow equalization and distribution structure for an energy storage device 3. This flow equalization and distribution structure is used to distribute coolant to four vertically stacked energy storage devices 3. The flow equalization and distribution structure includes a vertical liquid inlet mechanism 1 and a vertical liquid return mechanism 2. The coolant flows to the four energy storage devices 3 through the vertical liquid inlet mechanism 1, cools the battery pack in the energy storage device 3, and then flows out to the vertical liquid return mechanism 2. The coolant is returned to the cooling circulation mechanism 4 for recooling via the vertical liquid return mechanism 2, and then re-enters the vertical liquid inlet mechanism 1.

[0040] like Figure 1 As shown, the vertical liquid inlet mechanism 1 of this embodiment 1 includes a vertically arranged liquid inlet manifold 101 and four liquid inlet ports 102 located on the single liquid inlet manifold 101. The four liquid inlet ports 102 are arranged at intervals along the vertical direction of the liquid inlet manifold 101. Each liquid inlet port 102 is connected to the liquid inlet of an energy storage device 3. The liquid inlet port 102 at the lowest position is provided with four resistance elements 103 to increase the flow resistance of the pipeline. The liquid inlet structure above the lowest liquid inlet port 102 is provided with three, two and one resistance elements 103 in sequence from low to high. Of course, the distribution of the number of resistance elements 103 in this embodiment 1 is not a limitation on the number of resistance elements 103 in this application scheme. According to the actual number of stacked energy storage devices 3, the distribution can be based on the principle that the number of resistance elements 103 decreases from the lowest liquid inlet port 102 to the highest liquid inlet port 102.

[0041] It should be noted that, as Figure 2 and Figure 3 As shown, the resistance components 103 used in this embodiment 1 can be connected to each other. Specifically, as... Figure 4 As shown, the resistance member 103 in this embodiment 1 adopts a cylindrical structure. Both ends of the resistance member 103 are provided with receiving grooves 1033. An axially penetrating liquid flow channel 1034 is provided inside the resistance member 103, and the liquid flow channel 1034 is eccentrically arranged relative to the central axis of the resistance member 103.

[0042] Furthermore, such as Figure 4-6 As shown, in this embodiment 1, the circumferential edge of one end of the resistance member 103 is provided with two pairs of positioning bosses 1031. Each pair of positioning bosses 1031 is arranged axially symmetrically with respect to the central axis of the resistance member 103, and the two pairs of positioning bosses 1031 are set at a 90-degree angle. Similarly, the circumferential edge of the opposite end of the resistance member 103 is also provided with two pairs of positioning grooves 1032 that adapt to the positioning bosses 1031. Each pair of positioning grooves 1032 is arranged axially symmetrically with respect to the central axis of the resistance member 103, and the two pairs of positioning grooves 1032 are set at a 90-degree angle.

[0043] like Figure 3 As shown, when two or more resistance components 103 are joined together, adjacent resistance components 103 are circumferentially fixed by fitting together with positioning bosses 1031 and positioning grooves 1032, and the liquid flow channels 1034 of adjacent resistance components 103 are staggered around the connecting axis. Figure 2As shown in this embodiment 1, when adjusting the liquid flow channels 1034 of adjacent resistance members 103, the center distance of the liquid flow channels 1034 of adjacent resistance members 103 is kept as far apart as possible. This structure makes the liquid flow channels 1034 constructed when two or more resistance members 103 are spliced ​​together present an S-shaped tortuous structure, thereby increasing the flow resistance.

[0044] Furthermore, it should be explained that the number of positioning bosses 1031 or positioning grooves 1032 provided at the end of the resistance member 103 in this embodiment 1 is not limited. The number of positioning bosses 1031 or positioning grooves 1032 can be set to 2 pairs, 4 pairs, 6 pairs or more. Generally, the more pairs of positioning bosses 1031 or positioning grooves 1032 are provided, the smaller the minimum deflection angle of adjacent resistance members 103, and the more precise the flow resistance can be adjusted.

[0045] Example 2:

[0046] Combination Figure 1 as well as Figure 7-11 As shown, this embodiment 2 also discloses a flow equalization and liquid distribution structure for an energy storage device 3. The flow equalization and liquid distribution structure of this embodiment 2 is basically the same as that of embodiment 1, except that the circumferential edge of one end of the resistance member 103 in this embodiment 2 is provided with a connecting body 1035, and the circumferential edge of the opposite end of the resistance member 103 is provided with a connecting groove 1036 adapted to the connecting body 1035, such as... Figure 9-11 As shown. Using this structure, as... Figure 8 As shown, when two or more resistance components 103 are spliced ​​together, adjacent resistance components 103 are axially fixed by fitting together with the connector 1035 and the connecting groove 1036, while adjacent resistance components 103 remain circumferentially movable.

[0047] The staggered angle range of the liquid flow channels 1034 of adjacent resistance members 103 is 0-180 degrees. Since the adjacent resistance members 103 in this embodiment 2 can move circumferentially, different flow channel structures can be constructed by adjusting the rotation angle of different resistance members 103. For example, when three resistance members 103 are spliced, the resistance member 103 at the first end keeps the liquid flow channel 1034 unchanged, the liquid flow channel 1034 of the resistance member 103 in the middle is deflected by 45 degrees, and the resistance member 103 at the end keeps the liquid flow channel 1034 deflected by 90 degrees. The deflection angle is based on a plane rectangular coordinate system constructed with the central axis of the resistance member 103 as the origin, parallel to the cross-section of the resistance member 103. Using this structure, it is not necessary to disassemble the resistance members 103 of the liquid inlet interface 102. Only by rotating the resistance members 103 at different positions to a certain angle, the flow resistance of the corresponding liquid inlet interface 102 can be adjusted, thereby realizing the dynamic adjustment of the flow resistance of different liquid inlet interfaces 102.

[0048] Furthermore, in this embodiment 2, to avoid coolant leakage when the resistance components 103 are spliced, a sealing mechanism, such as a sealing gasket, can be provided on the connecting body 1035 or connecting groove 1036 of each resistance component 103. When the connecting body 1035 and connecting groove 1036 of adjacent resistance components 103 are connected, liquid leakage can be prevented by the sealing mechanism.

[0049] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A flow equalization and liquid distribution structure for an energy storage device, characterized in that, Includes a vertical liquid inlet mechanism and a vertical liquid return mechanism. The vertical liquid inlet mechanism includes at least one vertically arranged liquid inlet manifold and multiple liquid inlet ports located on the single liquid inlet manifold. The multiple liquid inlet ports are arranged at intervals along the vertical direction of the liquid inlet manifold. Each liquid inlet port is connected to the liquid inlet of an energy storage device. Each liquid inlet port is provided with at least one resistance element for increasing the flow resistance of the pipeline. As the height of the liquid inlet port decreases, the number of resistance elements corresponding to the liquid inlet port increases. The vertical return liquid mechanism includes at least one return liquid manifold and multiple return liquid interfaces located on the single return liquid manifold, with each return liquid interface connected to the liquid outlet of an energy storage device.

2. The flow equalization and liquid distribution structure according to claim 1, characterized in that, The resistance element adopts a cylindrical structure, and at least one end of the resistance element is provided with a receiving groove. The resistance element is provided with an axially penetrating liquid flow channel, and the liquid flow channel is eccentrically arranged relative to the central axis of the resistance element.

3. The flow equalization and liquid distribution structure according to claim 2, characterized in that, The circumferential edge of one end of the resistance member is provided with at least a pair of positioning bosses, and the circumferential edge of the opposite end of the resistance member is provided with at least a pair of positioning grooves that are adapted to the positioning bosses.

4. The flow equalization and liquid distribution structure according to claim 3, characterized in that, When two or more resistance components are joined together, adjacent resistance components are circumferentially fixed by fitting positioning bosses and positioning grooves, and the liquid flow channels of adjacent resistance components are staggered around the connecting axis.

5. The flow equalization and liquid distribution structure according to claim 3, characterized in that, The resistance member has two pairs of positioning bosses at one end. Each pair of positioning bosses is arranged symmetrically with respect to the central axis of the resistance member, and the two pairs of positioning bosses are set at a 90-degree angle.

6. The flow equalization and liquid distribution structure according to claim 2, characterized in that, The circumferential edge of one end of the resistance member is provided with a connecting body, and the circumferential edge of the opposite end of the resistance member is provided with a connecting groove that adapts to the connecting body.

7. The flow equalization and liquid distribution structure according to claim 6, characterized in that, When two or more resistance components are joined together, adjacent resistance components are axially fixed by fitting together with connecting bodies and connecting grooves, while adjacent resistance components remain circumferentially movable.

8. The flow equalization and liquid distribution structure according to claim 7, characterized in that, The intersecting angle of the liquid flow channels of adjacent resistance components ranges from 0 to 180 degrees.

9. The flow equalization and liquid distribution structure according to claim 7, characterized in that, Each resistance component has a sealing mechanism on its connecting body or connecting groove. When the connecting bodies and connecting grooves of adjacent resistance components are connected, the sealing mechanism prevents liquid leakage.

10. A liquid cooling device for cooling and dissipating heat from an energy storage device, characterized in that, The liquid cooling device includes a cooling circulation mechanism and a flow equalization and distribution structure as described in any one of claims 1-9, wherein the cooling circulation mechanism is used to provide circulation power and recooling for the coolant; and the flow equalization and distribution structure distributes the coolant to the energy storage device.

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