Battery pack cooled by spiral flow channel three-dimensional liquid cooling plate

Abstract

The utility model relates to the technical field of heat dissipation devices, and discloses a battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate, which comprises a three-dimensional liquid cooling plate and a plurality of battery monomers. The three-dimensional liquid cooling plate comprises a bottom plate and a plurality of side plates, the bottom plate comprises a liquid cooling plate inlet, a liquid cooling plate outlet and a bottom plate spiral flow channel, each side plate comprises a liquid inlet, a liquid outlet and a side plate spiral flow channel, openings of the liquid inlets and the liquid outlets face the bottom plate, and the side plates are fixed on the bottom plate. Each spiral flow channel is of a flow channel structure comprising a plurality of smooth arc-shaped corners. According to the utility model, the bottom plate flow channel and the side plate flow channel are connected in parallel, so that the bottom plate and the side plate are integrated to the same liquid inlet / outlet. The single batteries are square batteries and form a battery array to be arranged on the three-dimensional liquid cooling plate, the bottom face of the battery array is connected with the bottom plate through a heat conduction pad, and the side faces of the battery array abut against the side plates. The spiral flow channel structure reduces the influence of the temperature gradient of the cooling medium, so that the heat exchange surface has better temperature uniformity, and the three-dimensional liquid cooling plate is used for synchronously cooling the bottom surface and the side surface of the battery pack, so that the requirement of the battery pack on the temperature uniformity is met, and the long-time stable work of the battery pack is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation devices, and in particular provides a battery pack cooled by a three-dimensional liquid cooling plate with a spiral flow channel. Background Art

[0002] With the continuous development of new energy technologies, the spatial and temporal unevenness of energy production has become increasingly prominent, leading to a growing demand for energy storage. Battery energy storage, as an important form of energy storage, often utilizes liquid cooling for thermal management.

[0003] Existing liquid cold plates are often placed at the bottom of the battery pack for single-sided cooling. At the same time, the top tabs of the batteries generate more heat, which leads to a temperature difference between the bottom and top of the battery cells. The existing liquid cold plate flow channel design has many corners with sharp changes in direction, which causes flow stagnation areas during the flow of the cooling medium, forming local high-temperature areas on the surface of the cold plate. At the same time, the temperature gradient caused by the continuous heat absorption of the cooling medium during the flow process will lead to an increase in the temperature difference between the battery cells.

[0004] Therefore, a heat dissipation device is needed that can simultaneously reduce the temperature difference between battery cells and within a battery cell in a battery pack, meet the battery's requirements for temperature uniformity, and ensure safe and stable operation of the battery. Utility Model Content

[0005] The purpose of this utility model is to provide a battery pack cooled by a three-dimensional liquid cooling plate with spiral flow channels. This solution addresses the problem of uneven temperature in some existing liquid cooling plates, effectively improving the plate's temperature uniformity and heat dissipation performance, thereby ensuring stable battery operation and extending battery life.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] A battery pack cooled by a three-dimensional liquid cooling plate with a spiral flow channel includes a three-dimensional liquid cooling plate and multiple battery cells. The three-dimensional liquid cooling plate includes a bottom plate and multiple side plates. The bottom plate includes a liquid cooling plate inlet, a liquid cooling plate outlet, and a bottom plate spiral flow channel; the side plates include a side plate liquid inlet, a side plate liquid outlet, and a side plate spiral flow channel; the battery cells are square battery cells and form a battery array.

[0008] Furthermore, the side plate is inserted into the upper cover plate of the bottom plate through the liquid inlet and the liquid outlet and is fixed to the bottom plate, and the spiral flow channel of the bottom plate and the spiral flow channel of the side plate are connected in parallel through the liquid inlet and outlet of the side plate.

[0009] Furthermore, the cooling medium enters the spiral flow channel of the bottom plate from the liquid cooling plate inlet, enters the spiral flow channel of the side plate through the side plate liquid inlet, and then merges with the cooling medium flowing through the spiral flow channel of the bottom plate through the side plate liquid outlet, and finally flows out from the liquid cooling plate outlet, completing the heat exchange of the battery pack.

[0010] Furthermore, the spiral flow channels each include a plurality of smooth arc-shaped corners, and the flow directions between adjacent flow channels are different.

[0011] Preferably, the arc-shaped corner is in the shape of a circular arc or an elliptical arc.

[0012] Preferably, the portion of the arc-shaped corner close to the edge of the liquid cooling plate extends outward.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The spiral flow channel on the bottom plate of the three-dimensional liquid cooling plate is connected in parallel with the spiral flow channel on the side plate, using the same inlet and outlet. At the same time, the inlet and outlet of the three-dimensional liquid cooling plate can be selected in different embodiments according to the orientation requirements, which is convenient for arranging the pipelines of the battery pack.

[0015] The three-dimensional liquid cooling plate includes a bottom plate and side plates, which can achieve simultaneous cooling of the bottom and sides, and can reduce the temperature difference inside the battery cell caused by cooling the bottom surface alone and the high heat generated on the top of the battery.

[0016] The cooling pipes of the bottom plate and side plates of the three-dimensional liquid cooling plate both use spiral flow channels. The inflow section and outflow section of the cooling medium are close to each other and arranged in a staggered manner. The flow directions of adjacent flow channels are different, which reduces the impact of the temperature gradient generated by the continuous heat absorption of the cooling medium during the flow process, making the surface of the liquid cooling plate have better temperature consistency and reducing the temperature difference between battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To simplify the drawings, each figure schematically shows only the parts related to the present invention, which do not represent the actual structure of the product.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a first embodiment of a battery pack cooled by a three-dimensional liquid cooling plate with a spiral flow channel provided by the present invention.

[0019] Figure 2 This is a schematic structural diagram of the spiral flow channel of the bottom plate of the three-dimensional liquid cooling plate provided in Example 1 of the present utility model.

[0020] Figure 3 This is a schematic structural diagram of the spiral flow channel on the side plate of the three-dimensional liquid cooling plate provided in Example 1 of the present utility model.

[0021] Figure 4 This is a schematic structural diagram of a three-dimensional liquid cooling plate according to a first embodiment of the present invention.

[0022] Figure 5 for Figure 4 A partial enlarged view of the connection.

[0023] Figure 6This is a schematic diagram of the three-dimensional structure of a second embodiment of a battery pack cooled by a three-dimensional liquid cooling plate with a spiral flow channel provided by the present invention.

[0024] Figure 7 This is a schematic structural diagram of the spiral flow channel of the bottom plate of the three-dimensional liquid cooling plate provided in the second embodiment of the present invention.

[0025] Figure 8 This is a schematic structural diagram of the spiral flow channel on the side plate of the three-dimensional liquid cooling plate provided in the second embodiment of the present invention.

[0026] Figure 9 This is a schematic structural diagram of a three-dimensional liquid cooling plate according to a second embodiment of the present invention.

[0027] Figure 10 for Figure 9 A partial enlarged view of the connection.

[0028] Explanation of the symbols in the figure: Bottom plate 1, which includes the liquid cooling plate inlet 11, the liquid cooling plate outlet 12, and the bottom plate spiral flow channel 13. The bottom plate spiral flow channel includes an inlet extension 131, an outlet extension 132, a first curved corner 133, a second curved corner 134, a third curved corner 135, a fourth curved corner 136, a fifth curved corner 137, a sixth curved corner 138, a seventh curved corner 139, and a bottom side confluence portion 130. Side plate 2, which includes a side plate liquid inlet 21, a side plate liquid outlet 22, and a side plate spiral flow channel 23. The side panel spiral flow channel includes a first curved corner 231, a second curved corner 232, a third curved corner 233, a fourth curved corner 234, a fifth curved corner 235, a sixth curved corner 236, and a seventh curved corner 237. Battery cell 3, thermal pad 4. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Example 1

[0031] Reference Figures 1 to 5A battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate is provided, comprising a base plate 1, side plates 2, battery cells 3, and thermal pads 4. The side plates 2 are fixed to the base plate 1, and the battery cells 3 are arranged in a battery array on the base plate 1 and connected to the base plate via thermal pads 4. The sides of the battery cells 3 are in close contact with the side plates 2.

[0032] The base plate 1 includes a liquid cooling plate inlet 11 and a liquid cooling plate outlet 12, and a base plate spiral flow channel cooling pipeline 13 is provided on the base plate, and the liquid cooling plate inlet 11 and the liquid cooling plate outlet 12 are connected through the base plate spiral flow channel cooling pipeline; the side plate 2 includes a side plate liquid inlet 21 and a side plate liquid outlet 22, and a side plate spiral flow channel cooling pipeline 23 is provided on the side plate 2, and the side plate liquid inlet and the side plate liquid outlet are connected through the side plate spiral flow channel cooling pipeline; two side plates 2 are arranged on the base plate 1 along the width direction.

[0033] The bottom plate spiral flow channel cooling pipeline is symmetrically distributed along the midline of the liquid cooling plate's length (left and right halves, with the left half being the default below). The bottom plate spiral flow channel cooling pipeline includes a bottom plate inlet extension portion 131, an outlet extension portion 132, a first curved corner 133 of the bottom plate flow channel, a second curved corner 134 of the bottom plate flow channel, a third curved corner 135 of the bottom plate flow channel, a fourth curved corner 136 of the bottom plate flow channel, a fifth curved corner 137 of the bottom plate flow channel, a sixth curved corner 138 of the bottom plate flow channel, and a seventh curved corner 139 of the bottom plate flow channel.

[0034] The arc-shaped corners of the bottom plate flow channel are semicircular, and the first arc-shaped corner 133 and the second arc-shaped corner 134 of the bottom plate flow channel extend outwardly toward the edge of the bottom plate 1 to adapt to the square bottom plate edge.

[0035] The liquid cooling plate inlet 11 is located at the bottom plate channel inlet extension portion 131 , and the liquid cooling plate outlet 12 is located at the bottom plate channel outlet extension portion 132 .

[0036] The side plate liquid inlet 21 is located between the liquid cooling plate inlet 11 and the first arc corner 133 of the bottom plate flow channel, and the side plate liquid outlet 22 is located between the seventh arc corner 139 of the bottom plate channel and the liquid cooling plate outlet 12.

[0037] The internal channels of the side panel 2 are symmetrically distributed along the longitudinal midline, with a side panel liquid inlet 21, a side panel liquid outlet 22, and a side panel spiral flow channel cooling pipeline 23 provided on each side. The two sides are not connected to each other (the left half and the right half, hereinafter referred to as the left half by default). The side panel spiral flow channel cooling pipeline 23 includes a first curved corner 231 of the side panel flow channel, a second curved corner 232 of the side panel flow channel, a third curved corner 233 of the side panel flow channel, a fourth curved corner 234 of the side panel flow channel, a fifth curved corner 235 of the side panel flow channel, a sixth curved corner 236 of the side panel flow channel, and a seventh curved corner 237 of the side panel flow channel.

[0038] The first and seventh curved corners 231 and 237 of the side panel flow channel are quarter-circular, while the remaining curved corners are semi-circular. The first, second, and third curved corners 231, 232, and 233 of the side panel flow channel extend outward toward the edge of the side panel 2 to accommodate the square edge of the side panel.

[0039] The side plate liquid inlet 21 is located at the inflow end of the side plate spiral flow channel 23 , and the side plate liquid outlet 22 is located at the terminal end of the side plate spiral flow channel 23 .

[0040] The side plate liquid inlet 21 and liquid outlet 22 penetrate the upper cover of the bottom plate 1. By directly inserting the side plate 2 into the bottom plate 1 and connecting the bottom plate spiral flow channel 13 with the side plate spiral flow channel 23, the cooling medium flows in through the liquid cooling plate inlet 11 and is split into two parts along the center line of the liquid cooling plate. Part of the cooling medium enters the side plate spiral flow channel 23 through the side plate liquid inlet 21, flows through the curved corners of the side plate flow channel in sequence, and reaches the side plate liquid outlet 22; the remaining cooling medium flows through the curved corners of the bottom plate in sequence, and then merges with the cooling medium flowing out of the side plate liquid outlet, and flows out of the liquid cooling plate through the liquid cooling plate outlet 12, so that the cooling medium can dissipate heat from the bottom and sides of the battery array arranged on the liquid cooling plate at the same time, thereby achieving the temperature uniformity requirement of the battery pack.

[0041] Example 2

[0042] Reference Figures 6 to 10 A battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate is provided, comprising a bottom plate 1a, side plates 2a, battery cells 3, and thermal pads 4. The side plates 2a are fixed to the bottom plate 1a. The battery cells 3 form a battery array arranged on the bottom plate 1a and connected to the bottom plate via thermal pads 4. The sides of the battery cells 3 are in close contact with the side plates 2a.

[0043] The bottom plate 1a includes a liquid cooling plate inlet 11a and a liquid cooling plate outlet 12a, and a bottom plate spiral flow channel 13a is provided on the bottom plate, and the liquid cooling plate inlet 11a and the liquid cooling plate outlet 12a are connected through the bottom plate spiral flow channel 13a; the side plate 2a includes a side plate liquid inlet 21a and a side plate liquid outlet 22a, and a side plate spiral flow channel 23a is provided on the side plate 2a, and the side plate liquid inlet 21a and the side plate liquid outlet 22a are connected through the side plate spiral flow channel 23a; two side plates 2a are arranged on the bottom plate 1a along the width direction.

[0044] The bottom plate spiral flow channel 13a is symmetrically distributed along the midline of the liquid cooling plate width (left and right halves, with the left half being the default below). The bottom plate spiral flow channel 13a includes a bottom plate inlet extension 131a, an outlet extension 132a, a first curved corner 133a, a second curved corner 134a, a third curved corner 135a, a fourth curved corner 136a, a fifth curved corner 137a, a sixth curved corner 138a, a seventh curved corner 139a, and a bottom side converging portion 130a.

[0045] The arc-shaped corners of the bottom plate flow channel are semicircular, and the first arc-shaped corner 133a and the second arc-shaped corner 134a of the bottom plate flow channel extend outwardly toward the edge of the bottom plate 1a to adapt to the edge of the square bottom plate.

[0046] The liquid cooling plate inlet 11a is located at the bottom plate inlet extension portion 131a, and the liquid cooling plate outlet 12a is located at the bottom plate outlet extension portion 132a.

[0047] The side plate liquid inlet 21a is located at the first arc-shaped corner 133a of the bottom plate flow channel, and the side plate liquid outlet 22a is located at the bottom side confluence portion 130a.

[0048] The side panel 2a is provided with a side panel liquid inlet 21a, a side panel liquid outlet 22a, and a side panel spiral flow channel cooling pipeline 23a. The side panel spiral flow channel cooling pipeline 23a includes a first curved corner 231a of the side panel flow channel, a second curved corner 232a of the side panel flow channel, a third curved corner 233a of the side panel flow channel, a fourth curved corner 234a of the side panel flow channel, and a fifth curved corner 235a of the side panel flow channel.

[0049] The first curved corner 231a of the side panel flow channel is a quarter arc, and the remaining curved corners of the side panel flow channel are semicircular. The first curved corner 231a, the second curved corner 232a, and the fifth curved corner 235a of the side panel flow channel extend outward toward the edge of the side panel 2a to adapt to the square side panel edge.

[0050] The side plate liquid inlet 21a is located at the inflow end of the side plate spiral flow channel 23a, and the side plate liquid outlet 22a is located at the terminal end of the side plate spiral flow channel 23a.

[0051] The side plate liquid inlet 21a and liquid outlet 22a penetrate the upper cover of the bottom plate. By directly inserting the side plate 2a into the bottom plate 1a, the bottom plate spiral flow channel 13a is connected to the side plate spiral flow channel 23a. The cooling medium flows in through the liquid cooling plate inlet 11a, is divided into two by the center line of the liquid cooling plate, and flows into the first curved corner 133a of the bottom plate flow channel. In the first curved corner, part of the cooling medium enters the side plate spiral flow channel 23a through the side plate liquid inlet 21a, flows through the curved corners of the side plate flow channel in turn, and reaches the bottom side confluence part 130a through the side plate liquid outlet 22a; the remaining cooling medium flows through the remaining curved corners of the bottom plate in turn, and then merges with the cooling medium flowing through the side plate at the bottom side confluence part, and flows out of the liquid cooling plate through the liquid cooling plate outlet 12a, so that the cooling medium can dissipate heat from the bottom and side surfaces of the battery array arranged on the liquid cooling plate at the same time, and the temperature uniformity requirement of the battery pack is achieved.

[0052] It will be apparent to those skilled in the art that various modifications and variations may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. A battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate, characterized in that: Includes a three-dimensional liquid cooling plate and multiple battery cells; The three-dimensional liquid cooling plate includes a bottom plate and multiple side plates; the bottom plate includes a liquid cooling plate inlet, a liquid cooling plate outlet and a bottom plate spiral flow channel; the side plates include a liquid inlet and a liquid outlet opening toward the bottom plate and a side plate spiral flow channel; the side plates are vertically fixed to the upper cover plate of the bottom plate, and the liquid inlet and outlet of the side plates are inserted into the bottom plate, so that the side plate spiral flow channel is connected to the bottom plate spiral flow channel; the spiral flow channel is characterized in that the cooling medium in adjacent flow channels in the single-sided spiral flow channel structure has different flow directions, and the corners are all smooth arc corners; The battery cells are square battery cells, characterized in that the battery cells form a battery array, are connected through thermal pads and are arranged on the bottom plate, and the side surfaces of single-row batteries in the battery array are close to the side plates.

2. A battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate according to claim 1, characterized in that The bottom plate spiral flow channel is connected in parallel with the side plate spiral flow channel, integrating the bottom plate and the side plate into the same inlet and outlet.

3. A battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate according to claim 1, characterized in that The three-dimensional liquid cooling plate is used to dissipate heat from the bottom and side surfaces of the square battery array simultaneously.

4. A battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate according to claim 1, characterized in that The cooling medium enters the spiral flow channel of the bottom plate through the inlet of the liquid cooling plate. During the flow process, part of the cooling medium enters the spiral flow channel of the side plate through the liquid inlet of the side plate, and then returns to the bottom plate through the liquid outlet of the side plate, and merges with the remaining cooling medium flowing through the spiral flow channel of the bottom plate, and finally flows out at the outlet of the liquid cooling plate to complete the heat exchange.

5. A battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate according to claim 1, characterized in that The inlet and outlet of the liquid cooling plate can be arranged in the length direction or in the width direction, and the corresponding bottom plate and side plate can be selected for assembly.

6. The battery pack cooled by a spiral flow channel three-dimensional liquid cooling plate according to claim 1, characterized in that: The bottom plate and the side plates are brazed cold plates, and the connection between the bottom plate and the side plates is fixed by welding.

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