Water-cooling heat dissipation device for battery cell in energy storage battery box

Abstract

The utility model relates to the technical field of heat dissipation devices, and discloses a water-cooling heat dissipation device for battery cells in an energy storage battery box, the water-cooling heat dissipation device comprises a heat dissipation piece, the heat dissipation piece comprises a heat insulation plate located between two groups of battery cells and heat dissipation plates arranged on the two sides of the heat insulation plate and used for dissipating heat of the side walls of the adjacent battery cells, and heat dissipation cavities for cooling liquid to flow are formed in the heat dissipation plates; the transition piece comprises a splitter plate arranged at one end of the heat dissipation piece and a confluence plate arranged at the other end of the heat dissipation piece, a splitter cavity is formed in the splitter plate, a confluence cavity is formed in the confluence plate, and the splitter cavity and the confluence cavity are both communicated with the heat dissipation cavity; and the conveying piece comprises a liquid supply pipe communicated with the flow dividing cavity and a flow collecting pipe communicated with the flow collecting cavity, and cooling liquid is introduced into the liquid supply pipe. The battery pack has the effect of improving the heat dissipation effect of the battery cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat dissipation devices, in particular to a water-cooled heat dissipation device for battery cells in an energy storage battery box. BACKGROUND

[0002] An energy storage battery box is a key energy storage device, which mainly consists of a battery pack, a battery management system (BMS), an energy management system (EMS), a power conversion system (PCS), and other necessary electrical components. Among these components, the battery pack is undoubtedly the core of the energy storage system and also the most expensive part. The battery cells inside the battery pack are the energy source of the entire battery system.

[0003] To ensure the safe operation of the battery, its working temperature is usually controlled below 55°C. During the operation of the battery cells in the energy storage battery box, the heat dissipation system plays a crucial role in maintaining the temperature stability of the battery cells through an effective heat dissipation mechanism.

[0004] Currently, the heat dissipation system is usually installed at the bottom of the battery cells inside the energy storage battery box, which not only provides necessary support for the battery cells but also maintains the temperature at the bottom of the battery cells within a safe range through heat dissipation. However, despite the effective control of the temperature at the bottom, the side edges of the battery cells, especially the part close to the top, still have a problem of high temperature, which may lead to over-temperature phenomenon, thereby affecting the performance and lifespan of the battery. CONTENT OF THE INVENTION

[0005] To improve the heat dissipation effect of the battery cells, the present application provides a water-cooled heat dissipation device for battery cells in an energy storage battery box.

[0006] The water-cooled heat dissipation device for battery cells in an energy storage battery box provided by the present application adopts the following technical solution:

[0007] A water-cooled heat dissipation device for battery cells in an energy storage battery box, which is located between two groups of battery cells, comprises:

[0008] A heat dissipation member, which comprises a heat insulation plate located between the two groups of battery cells and heat dissipation plates installed on both sides of the heat insulation plate for dissipating heat from the side walls of adjacent battery cells, and the heat dissipation plates are internally provided with heat dissipation cavities for the flow of cooling liquid;

[0009] A transition member, which comprises a flow distribution plate installed at one end of the heat dissipation member and a flow collection plate installed at the other end of the heat dissipation member, the flow distribution plate is internally provided with a flow distribution cavity, the flow collection plate is internally provided with a flow collection cavity, and the flow distribution cavity and the flow collection cavity are in communication with the heat dissipation cavities;

[0010] A conveying member, which comprises a liquid supply pipe in communication with the flow distribution cavity and a flow collection pipe in communication with the flow collection cavity, and the liquid supply pipe is internally supplied with cooling liquid.

[0011] Optionally, the shunt cavity and the heat dissipation cavity are communicated through a first communication unit, a heat dissipation hole penetrating the cavity wall of the heat dissipation cavity is arranged on the cavity wall of the heat dissipation cavity, a shunt hole penetrating the cavity wall of the shunt cavity is arranged on the cavity wall of the shunt cavity, and the heat dissipation hole and the shunt hole are threadedly connected with the first communication unit.

[0012] Optionally, the first communication unit comprises:

[0013] a first communication pipe, the heat dissipation hole and the shunt hole are threadedly connected with the first communication pipe, and a communication hole for the cooling liquid to flow into the interior of the first communication pipe is arranged on the side wall of the first communication pipe.

[0014] Optionally, the first communication unit further comprises:

[0015] a positioning plate, which is sealingly arranged at the end of the first communication pipe away from the heat dissipation plate, and is used for abutting against the side of the shunt plate away from the heat dissipation plate.

[0016] Optionally, a liquid supply hole is arranged on the side wall of the shunt plate.

[0017] the liquid supply pipe and the shunt cavity are communicated through a second communication unit, and the second communication unit comprises:

[0018] a second communication pipe, which is threadedly connected with the liquid supply hole and is used for communicating the liquid supply pipe and the shunt cavity.

[0019] a positioning ring, which is arranged on the outer circumferential wall of the second communication pipe and is used for positioning the second communication pipe.

[0020] Optionally, a connecting ring is arranged on the side wall of the shunt plate close to the liquid supply hole, the second communication pipe and the inner wall of the connecting ring are threadedly connected, and the end of the positioning ring and the end of the connecting ring abut against each other.

[0021] Optionally, an end cover is detachably connected to the end of the second communication pipe.

[0022] Optionally, a positioning groove is arranged on the end side wall of the heat insulation plate in the vertical direction, and a positioning strip is arranged on the side wall of the shunt plate and is inserted into the positioning groove in a fit manner.

[0023] Optionally, the cross sections of the positioning groove and the positioning strip are dovetail-shaped.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. The cooling liquid in the liquid supply pipe flows into the distribution cavity through the second communication pipe installed on the distribution plate, and flows into the heat dissipation cavity through the communication hole on the first communication pipe. During the flow of the cooling liquid in the heat dissipation cavity, the cooling liquid exchanges heat with the side wall of the battery cell through the cavity wall of the heat dissipation cavity to reduce the heat of the battery cell. The cooled cooling liquid flows into the confluence cavity on the confluence plate through the first communication pipe, and is discharged to the return pipe through the second communication pipe on the confluence plate for next processing. The cooling liquid in the heat dissipation cavity exchanges heat with the side wall of the battery cell through the cavity wall of the heat dissipation cavity at the same time, which improves the heat dissipation effect of the battery cell and reduces the possibility of the battery cell gathering heat to cause the battery cell to be hot. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0027] Figure 2 is a schematic diagram of the structure of the heat dissipation member in the embodiment of the present application.

[0028] Figure 3 is a schematic diagram of the position of the heat dissipation hole in the embodiment of the present application.

[0029] Figure 4 is Figure 2 is an enlarged schematic diagram of part A in

[0030] Figure 5 is a schematic diagram of the structure of the first communication unit in the embodiment of the present application.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1, heat dissipation member; 11, heat insulation plate; 111, positioning groove; 12, heat dissipation plate; 121, heat dissipation hole; 2, transition member; 21, distribution plate; 211, positioning strip; 212, liquid supply hole; 213, connecting ring; 22, confluence plate; 3, conveying member; 31, liquid supply pipe; 32, confluence pipe; 4, first communication unit; 41, first communication pipe; 42, positioning plate; 43, communication hole; 5, second communication unit; 51, second communication pipe; 52, positioning ring; 53, end cover; 6, plugging unit; 7, battery cell. DETAILED DESCRIPTION

[0033] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0034] The embodiment of the present application discloses a water-cooling heat dissipation device for battery cells in an energy storage battery box.

[0035] The utility model provides a kind of water cooling heat sink for energy storage battery box inside electric core, including heat sink 1, transition piece 2 and conveying piece 3.Heat sink 1 is located between two groups of electric core 7, and the side wall of two groups of electric core 7 is clamped to heat sink 1, transition piece 2 is installed at the end of heat sink 1, conveying piece 3 is internally connected with cooling liquid, and conveying piece 3 is communicated with heat sink 1 by transition piece 2.

[0036] Cooling liquid in conveying piece 3 flows into the inside of heat sink 1 by transition piece 2, and the cooling liquid in the inside of heat sink 1 exchanges heat with the side wall of electric core 7 through the side wall of heat sink 1, so as to improve the heat dissipation effect of electric core 7 and reduce the possibility of heat accumulation of electric core 7, which leads to over-temperature of electric core 7.

[0037] Heat sink 1 includes heat insulation plate 11 and heat dissipation plate 12.Two heat dissipation plates 12 are located on both sides of heat insulation plate 11, and each heat dissipation plate 12 is in contact with the side wall of the corresponding electric core 7, and the heat dissipation plate 12 is used for heat dissipation of electric core 7, and the heat insulation plate 11 is used for separating the two heat dissipation plates 12, so as to reduce the possibility of mutual influence of the two heat dissipation plates 12, thereby further ensuring the heat dissipation effect of the heat dissipation plate 12 on the electric core 7.

[0038] Heat insulation plate 11 is made of heat insulation material, and in the embodiment of the utility model, heat insulation plate 11 is made of glass fiber material.

[0039] Each heat dissipation plate 12 is provided with a heat dissipation cavity for the flow of cooling liquid, and the end side wall of each heat dissipation plate 12 is provided with a heat dissipation hole 121, and the heat dissipation hole 121 is provided with a plurality of heat dissipation holes 121 in the vertical direction, and in the embodiment of the utility model, the end side wall of each heat dissipation plate 12 is provided with two heat dissipation holes 121, and each heat dissipation hole 121 penetrates the cavity wall of the heat dissipation cavity.

[0040] Cooling liquid flows into or flows out of the heat dissipation cavity through the heat dissipation hole 121, and in the embodiment of the utility model, the cooling liquid flows into the heat dissipation cavity through the heat dissipation hole 121 below the end side wall of the heat dissipation plate 12, and flows out of the heat dissipation cavity through the heat dissipation hole 121 above the end side wall of the heat dissipation plate 12.

[0041] When the cooling liquid flows in the heat dissipation cavity, it flows into the heat dissipation cavity through the heat dissipation hole 121 below the end side wall of the heat dissipation plate 12 and flows out of the heat dissipation cavity through the heat dissipation hole 121 above the end side wall of the heat dissipation plate 12, so as to increase the heat exchange contact area between the cooling liquid and the inner wall of the heat dissipation cavity, thereby improving the heat dissipation effect of the electric core 7.

[0042] The transition piece 2 comprises a distribution plate 21 and a converging plate 22. The distribution plate 21 and the converging plate 22 are respectively located at two ends of the heat dissipation piece 1, and are both mounted on the heat dissipation plate 12. In the embodiment, the distribution plate 21 and the converging plate 22 have the same structure.

[0043] A positioning groove 111 is formed in the vertical direction on the side wall of the heat insulation plate 11, and a positioning strip 211 is integrally formed on the side of the distribution plate 21 close to the heat dissipation plate 12 in the vertical direction. The positioning strip 211 and the positioning groove 111 are inserted and matched. In order to further improve the installation stability of the heat dissipation plate 12 and the distribution plate 21, the cross sections of the positioning strip 211 and the positioning groove 111 are both in dovetail shape.

[0044] The distribution plate 21 is internally provided with a distribution cavity, and a distribution hole corresponding to the heat dissipation hole 121 of the heat dissipation plate 12 is formed in the side wall of the distribution plate 21. The converging plate 22 is internally provided with a converging cavity.

[0045] The distribution cavity in the distribution plate 21 and the heat dissipation cavity in the heat dissipation plate 12 are communicated through the first communication unit 4.

[0046] The first communication unit 4 comprises a first communication pipe 41 and a positioning plate 42. The positioning plate 42 is sealingly and fixedly mounted at the end of the first communication pipe 41. The positioning plate 42 is located at the side of the distribution plate 21 away from the heat dissipation plate 12, and the heat dissipation hole 121 and the distribution hole are both threadedly connected with the first communication pipe 41.

[0047] When connecting the heat dissipation plate 12 and the distribution plate 21, the heat dissipation hole 121 and the distribution hole are both threadedly connected with the first communication pipe 41 by rotating the positioning plate 42, the heat dissipation plate 12 and the distribution plate 21 are connected through the first communication pipe 41, and the rotation of the positioning plate 42 is stopped when the positioning plate 42 and the side wall of the distribution plate 21 are positioned. The side wall of the distribution plate 21 positions the first communication pipe 41 through the positioning plate 42.

[0048] A plurality of communication holes 43 are formed in the side wall of the first communication pipe 41, and the communication holes 43 are communicated with the inside of the first communication pipe 41. The cooling liquid in the distribution cavity enters the inside of the first communication pipe 41 through the communication holes 43, and flows into the inside of the heat dissipation cavity from the first communication pipe 41.

[0049] The distribution cavity in the distribution plate 21 and the heat dissipation cavity in the heat dissipation plate 12 are also provided with a plugging unit 6. The heat dissipation hole 121 and the distribution hole are both communicated with the plugging unit 6. The plugging unit 6 and the first communication pipe 41 have similar structures, and the difference between the plugging unit 6 and the first communication pipe 41 is that the plugging unit 6 has no communication hole 43. The flow direction of the cooling liquid in the heat dissipation cavity is adjusted by adjusting the positions of the first communication unit 4 and the plugging unit 6.

[0050] The conveying piece 3 comprises a liquid supply pipe 31 and a converging pipe 32.

[0051] The liquid supply pipe 31 and the distribution cavity are communicated through the second communication unit 5.

[0052] The second communication unit 5 comprises a second communication pipe 51 and a positioning ring 52. The positioning ring 52 is coaxially fixedly installed on the outer wall of the second communication pipe 51.

[0053] The distribution plate 21 is provided with a liquid supply hole 212 in the vertical direction away from the heat dissipation plate 12. The liquid supply hole 212 is used to improve the convenience of connection of different pipelines. In the embodiment of the application, two liquid supply holes 212 are provided, and the second communication pipe 51 is threadedly connected with the liquid supply hole 212. In order to further improve the connection stability of the second communication pipe 51 and the liquid supply hole 212, the connection ring 213 is fixedly installed on the position of the distribution plate 21 close to the liquid supply hole 212, and the end portion of the positioning ring 52 and the end portion of the connection ring 213 are threadedly connected and positioned. The end portion of the second communication pipe 51 is detachably provided with a cover plate, and the second communication pipe 51 is threadedly connected with the cover plate.

[0054] The second connection pipe installed on the distribution plate 21 is used for the communication of the liquid supply pipe 31, and the second connection pipe installed on the confluence plate 22 is communicated with the confluence pipe 32.

[0055] The implementation principle of the water-cooled heat dissipation device for the battery cell in the energy storage battery box in the embodiment of the application is as follows: the cooling liquid in the liquid supply pipe 31 flows into the distribution cavity through the second communication pipe 51 installed on the distribution plate 21, and flows into the heat dissipation cavity through the communication hole 43 of the first communication pipe 41. In the process of flowing in the heat dissipation cavity, the cooling liquid exchanges heat with the side wall of the battery cell 7 through the cavity wall of the heat dissipation cavity, so as to reduce the heat of the battery cell 7. The cooled cooling liquid flows into the confluence cavity of the confluence plate 22 through the first communication pipe 41 again, and is discharged to the return pipe through the second communication pipe 51 of the confluence plate 22 for next step processing. The cooling liquid in the heat dissipation cavity exchanges heat with the side wall of the battery cell 7 through the cavity wall of the heat dissipation cavity at the same time, so as to improve the heat dissipation effect of the battery cell 7 and reduce the possibility of the battery cell 7 gathering heat to cause the battery cell 7 to be hot.

[0056] The above are the preferred embodiments of the application, which do not limit the protection scope of the application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A water-cooling heat dissipation device for battery cells in an energy storage battery box, the water-cooling heat dissipation device is located between two groups of battery cells (7), characterized in that: The water-cooling heat dissipation device comprises: a heat dissipation member (1) comprising a heat insulation plate (11) between two groups of battery cells (7) and heat dissipation plates (12) arranged on both sides of the heat insulation plate (11) for dissipating heat from the side walls of adjacent battery cells (7), wherein the heat dissipation plates (12) are internally provided with heat dissipation cavities for the flow of cooling liquid; a transition member (2) comprising a distribution plate (21) arranged at one end of the heat dissipation member (1) and a collection plate (22) arranged at the other end of the heat dissipation member (1), wherein the distribution plate (21) is internally provided with a distribution cavity and the collection plate (22) is internally provided with a collection cavity, and the distribution cavity and the collection cavity are in communication with the heat dissipation cavities; a conveying member (3) comprising a liquid supply pipe (31) in communication with the distribution cavity and a collection pipe (32) in communication with the collection cavity, and the liquid supply pipe (31) is internally provided with a cooling liquid inlet.

2. The water-cooling heat dissipation device for battery cells in an energy storage battery box according to claim 1, wherein: the distribution cavity and the heat dissipation cavity are in communication through a first communication unit (4), the cavity wall of the heat dissipation cavity is provided with heat dissipation holes (121) penetrating the cavity wall of the heat dissipation cavity, and the cavity wall of the distribution cavity is provided with distribution holes penetrating the cavity wall of the distribution cavity, and the heat dissipation holes (121) and the distribution holes are in threaded connection with the first communication unit (4).

3. The water-cooling heat dissipation device for battery cells in an energy storage battery box according to claim 2, wherein: the first communication unit (4) comprises: a first communication pipe (41), the heat dissipation holes (121) and the distribution holes are in threaded connection with the first communication pipe (41), and the side wall of the first communication pipe (41) is provided with a communication hole (43) for the flow of cooling liquid into the interior of the first communication pipe (41).

4. The water-cooling heat dissipation device for battery cells in an energy storage battery box according to claim 3, wherein: the first communication unit (4) further comprises: a positioning plate (42) sealingly arranged at the end of the first communication pipe (41) away from the heat dissipation plate (12), and the positioning plate (42) is used to abut against the side of the distribution plate (21) away from the heat dissipation plate (12).

5. The water-cooling heat dissipation device for battery cells in an energy storage battery box according to claim 1, wherein: the side wall of the distribution plate (21) is provided with a liquid supply hole (212); the liquid supply pipe (31) and the distribution cavity are in communication through a second communication unit (5), and the second communication unit (5) comprises: a second communication pipe (51) in threaded connection with the liquid supply hole (212) for communicating the liquid supply pipe (31) and the distribution cavity; a positioning ring (52) arranged on the outer circumferential wall of the second communication pipe (51) for positioning the second communication pipe (51).

6. The water-cooling heat dissipation device for battery cells in an energy storage battery box according to claim 5, wherein: The shunt plate (21) side wall is equipped with a connecting ring (213) near the liquid supply hole (212), the second communication pipe (51) and the inner wall of the connecting ring (213) are threadedly connected, and the end of the positioning ring (52) and the end of the connecting ring (213) are in abutment.

7. The water-cooled heat dissipation device for the battery cell in the energy storage battery box according to claim 5, characterized in that: The end of the second communication pipe (51) is detachably connected with an end cover (53).

8. The water-cooled heat dissipation device for the battery cell in the energy storage battery box according to claim 1, characterized in that: The end of the heat insulation plate (11) is provided with a positioning groove (111) in the vertical direction, and the side wall of the shunt plate (21) is provided with a positioning strip (211) matched with the positioning groove (111).

9. The water-cooled heat dissipation device for the battery cell in the energy storage battery box according to claim 8, characterized in that: The cross sections of the positioning groove (111) and the positioning strip (211) are dovetail-shaped.

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