Liquid cooling plate for sodium ion battery pack and sodium ion battery pack
By setting high-flow-rate and low-flow-rate liquid channels in the liquid cooling plate, combined with the diversion and confluence cavity structure, the problem of inconsistent temperature in sodium-ion battery packs is solved, achieving efficient cooling and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG XUPAI POWER TECH CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-21
AI Technical Summary
Existing liquid cooling plates cannot effectively guarantee the temperature consistency of sodium-ion battery packs, resulting in temperature differences affecting lifespan and high processing costs.
Design a liquid cooling plate comprising a high-flow-rate liquid channel and a low-flow-rate liquid channel. The high-flow-rate liquid channel is matched with the high-temperature region in the middle of the sodium-ion battery pack, and the low-flow-rate liquid channel is matched with the low-temperature regions on both sides. Combined with the shunt and manifold cavity structure, it achieves efficient heat exchange and reduces the temperature difference.
This effectively ensures temperature consistency in sodium-ion battery packs, improves cooling efficiency, extends service life, and reduces production costs.
Smart Images
Figure CN224153442U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cooling technology, and in particular to a liquid cooling plate for sodium-ion battery packs and a sodium-ion battery pack. Background Technology
[0002] Compared to individual batteries, battery packs can effectively improve voltage and capacity, meeting the power requirements of more application scenarios. However, when multiple individual batteries are connected together, the heat dissipation also increases, so heat dissipation of the battery pack is required.
[0003] In existing technologies, liquid cooling plates are commonly used for liquid cooling heat exchange in battery packs. To ensure heat exchange efficiency, complex U-shaped or S-shaped flow channels are usually set up. This method increases the processing cost of liquid cooling plates. Especially for sodium-ion battery packs, different parts of the pack have different temperatures, with the middle part having a higher temperature. Traditional liquid cooling plates cannot guarantee the temperature uniformity of sodium-ion battery packs during operation, causing temperature differences in different parts of the battery and affecting its service life. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a liquid cooling plate for sodium-ion battery packs and a sodium-ion battery pack, which can effectively ensure the temperature consistency of sodium-ion battery packs, improve cooling efficiency, and help reduce processing costs.
[0005] This invention provides a liquid cooling plate for a sodium-ion battery pack, comprising a plate body that contacts one end face of the sodium-ion battery pack in the height direction for heat exchange. The plate body includes an inlet, an outlet, and a cooling zone. Coolant can enter the cooling zone through the inlet and exit through the outlet. The cooling zone includes a high-flow-rate channel and a low-flow-rate channel, which extend along the width direction of the sodium-ion battery pack. The flow rate of the coolant in the high-flow-rate channel is greater than that in the low-flow-rate channel. The high-flow-rate channel mates with the middle of the working end face of the sodium-ion battery pack, and the two low-flow-rate channels are located on both sides of the high-flow-rate channel along the length direction of the sodium-ion battery pack. The low-flow-rate channels mate with the two sides of the working end face of the sodium-ion battery pack in the length direction.
[0006] In one embodiment, the plate further includes a flow divider cavity, which is disposed between the liquid inlet and the cooling area and connects the liquid inlet and the cooling area. The end of the flow divider cavity near the cooling area is connected to a plurality of flow divider channels, and the flow divider cavity is connected to the high-flow-rate liquid channel and the low-flow-rate liquid channel through the flow divider channels.
[0007] In one embodiment, the plate is larger in width than the sodium-ion battery pack, so that the shunt cavity protrudes from one end of the sodium-ion battery pack in width, or the shunt cavity and the shunt channel protrude from one end of the sodium-ion battery pack in width.
[0008] In one embodiment, the liquid inlet and the high-flow-rate liquid channel are located on the centerline of the sodium-ion battery pack along its length, and the centerlines of the three are collinear.
[0009] In one embodiment, the plate includes a manifold cavity disposed between the cooling region and the liquid outlet, and connecting the cooling region and the liquid outlet. The manifold cavity is connected to a plurality of manifold channels at one end near the cooling region, and the manifold cavity is connected to the high-flow-rate liquid channel and the low-flow-rate liquid channel through the manifold channels.
[0010] In one embodiment, the plate is larger in width than the sodium-ion battery pack, so that the manifold protrudes from one end of the sodium-ion battery pack in width, or the manifold and the manifold channel protrude from one end of the sodium-ion battery pack in width.
[0011] In one embodiment, the liquid outlet and the high-flow-rate liquid channel are located on the centerline of the sodium-ion battery pack along its length, and the centerlines of the three are collinear.
[0012] In one embodiment, the three liquid inlets are respectively connected to the high-flow-rate liquid channel and the two low-flow-rate liquid channels, and the coolant flow rate at the liquid inlet connected to the high-flow-rate liquid channel is greater than the coolant flow rate at the liquid inlet connected to the low-flow-rate liquid channel.
[0013] In one embodiment, the three liquid outlets are respectively connected to the high-flow-rate liquid channel and the two low-flow-rate liquid channels.
[0014] This utility model also proposes a sodium-ion battery pack, characterized in that it includes:
[0015] At least two individual sodium-ion blade batteries are stacked along their width and electrically connected.
[0016] And the aforementioned liquid cooling plate for sodium-ion battery packs, the plate being disposed at one end of at least two individual sodium-ion blade batteries in the height direction.
[0017] The beneficial effects of this utility model are as follows:
[0018] By using high-flow-rate and low-flow-rate channels, the high-flow-rate channel can cooperate with the high-temperature region in the middle of the working end face of the sodium-ion battery pack to provide higher heat exchange efficiency. The low-flow-rate channel can cooperate with the low-temperature regions on both sides of the working end face of the sodium-ion battery pack to provide a lower heat exchange efficiency than the high-flow-rate channel. The cooperation between the high-flow-rate and low-flow-rate channels can reduce the temperature difference of the sodium-ion battery pack, which is conducive to ensuring the temperature consistency of different parts of the sodium-ion battery pack, avoiding affecting the charging and discharging efficiency of the sodium-ion battery pack, and extending its service life. Moreover, only a single cavity structure needs to be set on the plate as the channel, without the need for complex flow channels. The overall structure is simple and reduces production costs. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the internal structure of the plate body according to an embodiment of the present utility model;
[0021] Figure 2 This is a schematic diagram of the internal structure of the plate body from another angle according to an embodiment of the present invention;
[0022] Figure 3 This is a schematic diagram of the structure of the plate and the sodium-ion battery pack according to an embodiment of the present invention.
[0023] In the picture:
[0024] 10-Plate; 100-Cooling area; 101-High flow rate liquid channel; 102-Low flow rate liquid channel; 11-Inlet; 12-Outlet; 13-Diverter chamber; 131-Diverter channel; 14-Merging chamber; 141-Merging channel; 20-Sodium-ion battery pack. Detailed Implementation
[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.
[0026] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.
[0027] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.
[0029] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0030] like Figure 3 As shown, to facilitate understanding of the approximate positional, connection, or movement relationships of the components in this utility model, the following definitions are provided. Figure 3 In the diagram, the X direction represents the length of the sodium-ion battery pack 20, and the Y direction represents the width of the sodium-ion battery pack 20. When viewed directly by someone skilled in the art, this is the direction of the attached... Figure 3 At that time, the direction of the gaze is the height direction of the sodium-ion battery pack 20. When the sodium-ion battery pack 20 is assembled, at least two individual sodium-ion batteries are stacked along its width direction.
[0031] like Figure 1 As shown, the liquid cooling plate for sodium-ion battery packs proposed in this utility model includes a plate body 10, combined with... Figure 3 The plate 10 is installed at one end of the sodium-ion battery pack 20 in the height direction and contacts one side end face of the sodium-ion battery 20 (i.e., the working end face described later) to achieve heat exchange. Figure 2The plate 10 includes an inlet 11, an outlet 12, and a cooling zone 100. The cooling zone 100 is connected to the inlet 11 and the outlet 12. Coolant can enter the cooling zone 100 through the inlet 11 and can be discharged through the outlet 12. The cooling zone 100 includes a high-flow-rate channel 101 and a low-flow-rate channel 102. The high-flow-rate channel 101 and the low-flow-rate channel 102 extend along the width direction of the sodium-ion battery pack 20. The flow rate of the coolant in the high-flow-rate channel 101 is greater than the flow rate of the coolant in the low-flow-rate channel 102. The high-flow-rate channel 101 is fitted with the middle of the working end face of the sodium-ion battery pack 20. The two low-flow-rate channels 102 are located on both sides of the high-flow-rate channel 101 along the length direction of the sodium-ion battery pack 20. The low-flow-rate channels 102 are fitted with the two sides of the working end face of the sodium-ion battery pack 20 in the length direction.
[0032] For the sodium-ion battery pack 20, during its use, the central part is a high-temperature region, while the two sides in the width direction can radiate heat through their opposite end faces in the width direction, and the temperature is relatively low compared to the central part, belonging to the low-temperature region. Through the setting of high-flow-rate liquid channel 101 and low-flow-rate liquid channel 102, the high-flow-rate liquid channel 101 can cooperate with the high-temperature region in the central part of the working end face of the sodium-ion battery pack 20 to provide a higher heat exchange efficiency. The low-flow-rate liquid channel 102 can cooperate with the low-temperature regions on both sides of the working end face of the sodium-ion battery pack 20 to provide a lower heat exchange efficiency than the high-flow-rate liquid channel 101. The cooperation of high-flow-rate liquid channel 101 and low-flow-rate liquid channel 102 can reduce the temperature difference of the sodium-ion battery pack 20, which is conducive to ensuring the temperature consistency of different parts of the sodium-ion battery pack 20, avoiding affecting the charging and discharging efficiency of the sodium-ion battery pack 20, and extending its service life. Moreover, only a single cavity structure needs to be set on the plate 10 as a liquid channel, without the need for complex flow channels, the overall structure is simple, and the production cost is reduced.
[0033] For example, the sodium-ion battery pack 20 is a module formed by stacking a plurality of individual sodium-ion blade batteries in the width direction.
[0034] For example, the outlet 12 is connected to the cooling device outside the plate 10 and communicates with the inlet 11 through the cooling device. The cooling device is used to cool the coolant and send the cooled coolant into the inlet 11. After the coolant is discharged from the outlet 12, it is cooled by the cooling device and returns to the inlet 11 to form a coolant circulation.
[0035] In one example, the number of inlets 11 is set to three, and the three inlets 11 are respectively connected to the high-flow-rate channel 101 and two low-flow-rate channels 102. The coolant flow rate at the inlet 11 connected to the high-flow-rate channel 101 is greater than the coolant flow rate at the inlet 11 connected to the low-flow-rate channels 102. The flow rate of the coolant can be controlled by different inlets 11, thereby adjusting the heat exchange efficiency of the coolant according to the cooling requirements of the sodium-ion battery pack 20.
[0036] For example, different valves are provided at the three inlets 11 to regulate the flow rate of the coolant.
[0037] In another example scheme, combined Figure 1 and Figure 2 The plate body 10 also includes a flow distribution cavity 13, which is located between the liquid inlet 11 and the cooling zone 100 and connects the liquid inlet 11 and the cooling zone 100. The flow distribution cavity 13 has several flow distribution channels 131 connected to one end near the cooling zone 100, and is connected to the high flow rate channel 101 and the low flow rate channel 102 through the flow distribution channels 131. The number of liquid inlets 11 is set to one. The coolant from the liquid inlet 11 first enters the flow distribution cavity 13 for distribution, and then flows through the flow distribution channel 131 to the high flow rate channel 101 and the low flow rate channel 102.
[0038] For example, the positional relationship of the inlet 11, the distribution cavity 13, and the high-velocity liquid channel 101 is configured such that the inlet 11 and the high-velocity liquid channel 101 are located on the centerline of the distribution cavity 13 along the length direction of the sodium-ion battery pack 20, and the centerlines of the three are collinear. With this configuration, when the coolant enters the distribution cavity 13 from the inlet 11, it can enter the high-velocity liquid channel 101 at a higher flow rate. After the coolant enters the distribution cavity 13 from the inlet 11, it diffuses along the length direction of the sodium-ion battery pack 20 into the distribution cavity 13 and enters the low-velocity liquid channel 102 at a lower flow rate. The distribution cavity 13 can play the role of regulating the flow rate of the coolant.
[0039] For example, such as Figure 3 As shown, the dimension of plate 10 in the width direction is larger than the width dimension of sodium-ion battery pack 20, so that the shunt cavity 13 protrudes from one end of sodium-ion battery pack 20 in the width direction, or the shunt cavity 13 and the shunt channel 131 protrude from one end of sodium-ion battery pack 20 in the width direction, thereby ensuring that the coolant in the shunt cavity 13, or the coolant in the shunt cavity 13 and the shunt channel 131, does not exchange heat with sodium-ion battery pack 20, so that the cooling area 100 can concentrate on cooling sodium-ion battery pack 20, and can ensure the temperature uniformity of sodium-ion battery pack 20.
[0040] In one example, the number of outlets 12 is set to three, and the three outlets 12 are respectively connected to the high flow rate channel 101 and two low flow rate channels 102 to discharge the coolant with inconsistent temperatures in the high flow rate channel 101 and the low flow rate channel 102.
[0041] In another example scheme, combined Figure 1 and Figure 2 The plate body 10 includes a manifold 14, which is located between the cooling zone 100 and the liquid outlet 12 and connects the cooling zone 100 and the liquid outlet 12. The manifold 14 has a plurality of manifold channels 141 connected to one end near the cooling zone 100, and is connected to the high flow rate liquid channel 101 and the low flow rate liquid channel 102 through the manifold channels 141. The number of liquid outlets 12 is set to one, so that the liquid flowing out of the high flow rate liquid channel 101 and the low flow rate liquid channel 102 can converge in the manifold 14 and be discharged through the liquid outlet 12.
[0042] For example, the positional relationship of the outlet 12, the manifold 14 and the high-velocity liquid channel 101 is configured such that the outlet 12 and the high-velocity liquid channel 101 are located on the centerline of the manifold 14 in the length direction of the sodium-ion battery pack 20, and the centerlines of the three are collinear. This configuration can cooperate with the inlet 11 to allow the coolant in the high-velocity liquid channel 101 to be discharged at a high flow rate, thereby ensuring that the coolant in the high-velocity liquid channel 101 circulates at a high flow rate.
[0043] For example, such as Figure 3 As shown, the width dimension of the plate 10 is larger than the width dimension of the sodium-ion battery pack 20, so that the manifold 14 protrudes from one end of the sodium-ion battery pack 20 in the width direction, or the manifold 14 and the manifold channel 141 protrude from one end of the sodium-ion battery pack 20 in the width direction. This ensures that the coolant with inconsistent temperature in the manifold 14 does not exchange heat with the sodium-ion battery pack 20, or the coolant in the manifold 14 and the manifold channel 141 does not exchange heat with the sodium-ion battery pack 20, so that the cooling area 100 can concentrate on cooling the sodium-ion battery pack 20, thus ensuring the temperature uniformity of the sodium-ion battery pack 20.
[0044] In one example embodiment, the plate 10 includes both the aforementioned split cavity 13 and merge cavity 14.
[0045] like Figure 3 As shown, this utility model also proposes a sodium-ion battery pack, comprising:
[0046] At least two individual sodium-ion blade batteries are stacked along their width and electrically connected.
[0047] And the aforementioned liquid cooling plate for sodium-ion battery packs, plate 10 is arranged at one end of at least two individual sodium-ion blade batteries in the height direction to enable heat exchange.
[0048] The working principle of the liquid cooling plate for sodium-ion battery packs proposed in this invention is as follows:
[0049] When the sodium-ion battery 20 needs to be cooled, the coolant enters the distribution chamber 13 through the inlet 11. The distribution chamber 13 and the distribution channel 131 distribute the coolant at different flow rates to the high-flow-rate channel 101 and the low-flow-rate channel 102. The coolant in the high-flow-rate channel 101 and the low-flow-rate channel 102 exchanges heat with the sodium-ion battery pack 20. After the heat exchange and temperature rise, the coolant enters the distribution chamber 14 through the confluence channel 141 and is discharged through the outlet 12. After being processed by the cooling device, the coolant re-enters the inlet 11 to achieve coolant circulation.
[0050] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A liquid cooling plate for a sodium-ion battery pack, characterized by, The device includes a plate (10) that contacts one end face of the sodium-ion battery pack (20) in the height direction to achieve heat exchange. The plate (10) includes an inlet (11), an outlet (12), and a cooling zone (100). Coolant can enter the cooling zone (100) through the inlet (11) and exit through the outlet (12). The cooling zone (100) includes a high-flow-rate channel (101) and a low-flow-rate channel (102). The high-flow-rate channel (101) and the low-flow-rate channel (102) flow along... The sodium-ion battery pack (20) extends in the width direction. The flow rate of the coolant in the high-flow-rate channel (101) is greater than the flow rate of the coolant in the low-flow-rate channel (102). The high-flow-rate channel (101) is engaged with the middle of the working end face of the sodium-ion battery pack (20). The two low-flow-rate channels (102) are located on both sides of the high-flow-rate channel (101) along the length direction of the sodium-ion battery pack (20). The low-flow-rate channels (102) are engaged with the working end face of the sodium-ion battery pack (20) on both sides in the length direction.
2. The liquid cold plate for a sodium-ion battery pack of claim 1, wherein, The plate (10) further includes a flow divider (13), which is located between the liquid inlet (11) and the cooling area (100) and connects the liquid inlet (11) and the cooling area (100). The end of the flow divider (13) near the cooling area (100) is connected to a plurality of flow divider channels (131), and the flow divider (13) is connected to the high flow rate liquid channel (101) and the low flow rate liquid channel (102) through the flow divider channels (131).
3. The liquid cold plate for a sodium-ion battery pack of claim 2, wherein, The plate (10) is larger in width than the sodium-ion battery pack (20) so that the shunt cavity (13) protrudes from one end of the sodium-ion battery pack (20) in width, or the shunt cavity (13) and the shunt channel (131) protrude from one end of the sodium-ion battery pack (20) in width.
4. The liquid cold plate for a sodium-ion battery pack of claim 2, wherein, The liquid inlet (11) and the high-flow-rate liquid channel (101) are located on the centerline of the sodium-ion battery pack (20) in the length direction of the flow divider (13), and the centerlines of the three are collinear.
5. The liquid cold plate for a sodium-ion battery pack of claim 1 or 2, wherein, The plate (10) includes a manifold (14), which is located between the cooling area (100) and the liquid outlet (12) and connects the cooling area (100) and the liquid outlet (12). The manifold (14) has a plurality of manifold channels (141) connected at one end near the cooling area (100). The manifold (14) is connected to the high-flow-rate liquid channel (101) and the low-flow-rate liquid channel (102) through the manifold channels (141).
6. The liquid cold plate for a sodium-ion battery pack of claim 5, wherein, The plate (10) is larger in width than the sodium-ion battery pack (20) so that the manifold (14) protrudes from one end of the sodium-ion battery pack (20) in width, or the manifold (14) and the manifold channel (141) protrude from one end of the sodium-ion battery pack (20) in width.
7. The liquid cold plate for a sodium-ion battery pack of claim 5, wherein, The liquid outlet (12) and the high-flow-rate liquid channel (101) are located on the centerline of the sodium-ion battery pack (20) in the length direction of the manifold (14), and the centerlines of the three are collinear.
8. The liquid cold plate for a sodium-ion battery pack of claim 1, wherein, The three liquid inlets (11) are respectively connected to the high-flow-rate liquid channel (101) and the two low-flow-rate liquid channels (102). The coolant flow rate at the liquid inlet (11) connected to the high-flow-rate liquid channel (101) is greater than the coolant flow rate at the liquid inlet (11) connected to the low-flow-rate liquid channel (102).
9. The liquid cooling plate for a sodium-ion battery pack according to claim 1, characterized in that, The three liquid outlets (12) are respectively connected to the high-flow-rate liquid channel (101) and the two low-flow-rate liquid channels (102).
10. A sodium-ion battery pack, characterized by, include: At least two individual sodium-ion blade batteries are stacked along their width and electrically connected. And the liquid cooling plate for sodium-ion battery packs according to any one of claims 1 to 9, the plate body (10) being disposed at one end of at least two individual sodium-ion blade batteries in the height direction.