Temperature-equalizing energy storage battery cold plate box body

Abstract

The utility model discloses a uniform temperature energy storage battery cold plate box body, which comprises a liquid cooling plate, the liquid cooling plate comprises a flow channel system, a liquid inlet and a liquid outlet, a water inlet flow collecting groove is arranged between the flow channel system and the liquid inlet, a water outlet flow collecting groove is arranged between the flow channel system and the liquid outlet, and a water outlet flow collecting groove is arranged between the flow channel system and the liquid outlet. And the runner system comprises a plurality of runner units which are arranged in parallel. The temperature uniformity of the liquid cooling plate is improved; the battery cell can be cooled more sufficiently, and the cooling efficiency is improved; the number of battery cells on a single cold plate is increased, the cost can be reduced, and the space utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to a liquid cooling plate, and more specifically, to a cold plate box body for a temperature-equalizing energy storage battery. Background Technique

[0002] The existing profile liquid cooling plate solution is to machine notches at both ends of the profile and then seal both ends by welding to form a flow channel. The defect is that this flow channel can only be made in series. Since the process is long, the temperature rise is greater the farther away from the water inlet, resulting in a large difference in the heat dissipation capacity at different positions of the liquid cooling plate and poor temperature equalization.

[0003] Chinese Patent Publication No. CN107820380A, Publication Date: March 20, 2018, Invention Name: A Liquid Cooling Plate and Its Heat and Cold Exchange Method. This application discloses a liquid cooling plate and its heat and cold exchange method, which mentions that "a plurality of heat exchange plates are arranged in parallel in the middle of the liquid cooling plate, the first connection hole, the cooling flow channel and the second connection hole are opened on the heat exchange plate, and a plurality of cooling flow channels are arranged in parallel on each heat exchange plate". The problem caused by the series flow channel is improved by adopting a parallel cooling flow channel; however, each cooling flow channel in this application is a straight channel, and the process is too short, resulting in insufficient heat dissipation and low heat dissipation efficiency. Moreover, the cell capacity of a single cold plate is low and the space utilization rate is low. Content of the Utility Model

[0004] The utility model overcomes the deficiencies in the prior art that the series flow channel makes the temperature equalization of the liquid cooling plate poor and the cell capacity of a single cold plate low, and provides a cold plate box body for a temperature-equalizing energy storage battery, which can solve the defect of poor temperature equalization of the series flow channel, improve the heat dissipation efficiency, and at the same time, increase the cell capacity of a single cold plate and improve the space utilization rate.

[0005] To solve the above technical problems, the utility model adopts the following technical solution: A cold plate box body for a temperature-equalizing energy storage battery, including a liquid cooling plate. The liquid cooling plate includes a flow channel system, a liquid inlet and a liquid outlet. An inlet water collecting tank is arranged between the flow channel system and the liquid inlet, and an outlet water collecting tank is arranged between the flow channel system and the liquid outlet. The flow channel system includes a plurality of flow channel units arranged in parallel.

[0006] The utility model arranges a collecting tank and a shunt port between the flow channel system and the liquid inlet and the liquid outlet. The inlet water collecting tank can slow down the speed of water flow into the flow channel, and at the same time, can evenly distribute the water flow into different inlet water shunt ports for cooling, improving the temperature equalization of the liquid cooling plate. After entering the flow channel system through the inlet water shunt port, the water flow flows along the S-shaped route of the cooling flow channel in the flow channel units arranged in parallel, and then enters the outlet water collecting tank through the outlet water shunt port. The parallel design of the flow channel units shortens the process of the water flow, can cool the battery cells more fully, and improves the heat dissipation efficiency.

[0007] Preferably, the flow channel unit includes a cooling flow channel, and the cooling flow channel is S-shaped.

[0008] Designing the cooling flow channel as an S-shaped flow channel enables the water flow to fully cool and dissipate heat from the battery cells at various positions on the liquid cooling plate uniformly during the cooling process.

[0009] Preferably, a water inlet shunt port is provided at the head end of the cooling flow channel, and a water outlet shunt port is provided at the tail end. The water inlet shunt port is communicated with the water inlet manifold, and the water outlet shunt port is communicated with the water outlet manifold.

[0010] The setting of the water inlet shunt port can ensure that the water flow enters the parallel flow channels more stably and uniformly. After being buffered by the water inlet manifold, the water flow is evenly distributed into each flow channel unit through the water inlet shunt port. After passing through the S-shaped cooling flow channel, the water flow converges again in the water outlet manifold through the water outlet shunt port, so that the water outlet speed can also be buffered.

[0011] Preferably, two adjacent flow channel units are symmetrically arranged.

[0012] The symmetrical design of two adjacent flow channel units can make the cooling flow channel cover the entire liquid cooling plate more evenly, improve the space utilization rate. At the same time, the symmetrical setting can prevent the parallel flow channel units from crossing and crowding, ensuring that the water flow is more orderly and rapid when flowing into and out of each flow channel unit.

[0013] Preferably, the liquid inlet is communicated with the water inlet manifold, and the liquid outlet is communicated with the water outlet manifold.

[0014] After passing through the liquid inlet, the water flow will first enter the water inlet manifold for buffering, and then be evenly distributed into the flow channel system for cooling, which can make the heat dissipation effect more uniform and improve the temperature uniformity. After passing through the flow channel system, the water flow enters the water outlet manifold, enabling the water flows flowing out of each flow channel unit to converge again. At the same time, after buffering the water flow speed, the water flow flows out of the liquid cooling plate through the liquid outlet.

[0015] Preferably, the water inlet manifold and the water outlet manifold are arranged side by side and separated by a partition.

[0016] The side-by-side design of the water inlet manifold and the water outlet manifold can save space, provide a larger installation space for the flow channel system, and improve the space utilization rate. At the same time, the water flow in the water inlet manifold also has a certain cooling effect on the water flow in the water outlet manifold.

[0017] Preferably, the liquid inlet and the liquid outlet are arranged on the same side of the liquid cooling plate, and the liquid inlet and the liquid outlet directly extend from the side surface of the liquid cooling plate. The settings of the liquid inlet and the liquid outlet can save space and ensure the airtightness after installing the upper cover on the installation surface.

[0018] Preferably, three parallel crossbeams perpendicular to the cooling channels are provided on the liquid cooling plate, and threaded holes are provided on the crossbeams. Two rows of threaded holes are provided on the middle crossbeam.

[0019] There are two rows of threaded holes on the middle crossbeam, and one row of threaded holes is provided on each of the other two crossbeams. The middle crossbeam can cooperate with the other two crossbeams to increase the length of the cold plate, thereby increasing the number of battery cells that can be arranged on a single cold plate, improving the space utilization rate, and reducing costs.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] (1) The setting of the collecting groove and the shunt ports, as well as the design of each parallel flow channel unit, can enable the water flow to be buffered and then evenly enter the flow channel system, improving the temperature uniformity of the liquid cooling plate;

[0022] (2) The S-shaped design of the flow channels and the symmetrical arrangement between the flow channel units enable the water flow to cool the battery cells more fully, improving the cooling efficiency; <{

[0023] (3) The design of the threaded holes on the crossbeams can increase the length of the cold plate, thereby increasing the number of battery cells on a single cold plate, reducing costs, and improving the space utilization rate. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present utility model.

[0025] Figure 2 is a schematic diagram of the flow direction in one of the flow channels in the flow channel system of the present utility model.

[0026] In the figure: 1. Inlet collecting groove, 2. Outlet collecting groove, 3. Liquid inlet, 4. Liquid outlet, 5. First inlet shunt port, 6. Second inlet shunt port, 7. Third inlet shunt port, 8. Fourth inlet shunt port, 9. First outlet shunt port, 10. Second outlet shunt port, 11. Third outlet shunt port, 12. Fourth outlet shunt port, 13. Cooling channel, 14. Crossbeam. Detailed Embodiments

[0027] The following will further specifically describe the technical solutions of the present utility model through specific embodiments in conjunction with the drawings:

[0028] With the development of electronic technology, the integration of electronic devices is getting higher and higher. Not only the heat generated by chips or modules in electronic devices is increasing, but also the heat dissipation devices of electronic devices mainly include air-cooled heat dissipation devices and liquid-cooled heat dissipation devices. Due to the high heat capacity and high conductivity of liquids, liquid-cooled heat dissipation devices have stronger heat dissipation capabilities than air-cooled heat dissipation devices. Therefore, liquid-cooled plates have good heat dissipation performance. The characteristics of the liquid-cooled plate cooling system are: (1) Since the indirect cooling method is adopted, electronic components can be prevented from directly contacting the coolant, reducing various contaminations and improving the working reliability; (2) Compared with direct cooling, the consumption of the coolant is less, and at the same time, it is also convenient to use more effective coolants to improve the cooling efficiency; (3) The components of the cold plate device are simple, the structure is compact, and it is convenient for maintenance. Considering these series of advantages, the liquid-cooled plate has a broad application prospect in heat dissipation devices.

[0029] In the prior art, two schemes are often adopted for liquid-cooled plates. One is the serpentine series flow channel scheme, and the other is the parallel flow channel scheme. The former has the disadvantage that the flow path is relatively long, resulting in a large liquid resistance in the pipeline and a low heat dissipation capacity. The water temperature rises higher the farther away from the liquid inlet 3; the latter also has the disadvantage that the heat dissipation capabilities at different positions on the surface of the liquid-cooled plate vary greatly.

[0030] Therefore, the purpose of the present invention is to provide a liquid-cooled plate, which can solve the defect of poor temperature uniformity of the series flow channel, improve the heat dissipation efficiency, and at the same time, can also increase the battery cell capacity of a single cold plate and improve the space utilization rate.

[0031] Embodiment 1: The present invention provides a temperature-equalizing energy storage battery cold plate box body, including a liquid-cooled plate, on which a flow channel system, a liquid inlet 3 and a liquid outlet 4 are provided. The liquid inlet 3 and the liquid outlet 4 are arranged on the same side of the liquid-cooled plate and directly extend from the side, so as to ensure good airtightness after the upper cover of the installation surface is installed. An inlet water collecting groove 1 is arranged between the flow channel system and the liquid inlet 3, and an outlet water collecting groove 2 is arranged between the flow channel system and the liquid outlet 4. The flow channel system includes a number of parallel flow channel units, and each flow channel unit includes a cooling flow channel 13. The head end of the cooling flow channel 13 is provided with an inlet water diversion port, and the tail end is provided with an outlet water diversion port.

[0032] One end of the liquid inlet 3 extends out of the side of the liquid-cooled plate, and the other end is communicated with the inlet water collecting groove 1. When the water flow passes through the liquid inlet 3, it enters the inlet water collecting groove 1, where it will be buffered. The inlet water collecting groove 1 is communicated with the inlet water diversion port. After being buffered in the inlet water collecting groove 1, the water flow will be evenly distributed from the inlet water diversion port into the parallel flow channel units. Such a design can improve the temperature-equalizing performance of the liquid-cooled plate.

[0033] The shapes of the water inlet shunt port and the water outlet shunt port are not limited. The shunt port can be designed in shapes such as circular, square, oval, etc. In this embodiment, the water inlet shunt port is designed as a number of parallel thin rectangles, which can slow down the speed of water flowing into the flow channel unit, and the water outlet shunt port is designed as a circle. The circular area is larger, so that the water can flow out without congestion and more smoothly.

[0034] In this embodiment, four water inlet shunt ports and four water outlet shunt ports are provided on the liquid cooling plate. When the water flow is buffered in the water inlet manifold 1, it will pass through the first water inlet shunt port 5, the second water inlet shunt port 6, the third water inlet shunt port 7 and the fourth water inlet shunt port 8 respectively, and enter the cooling flow channel 13. After the water flow is cooled in the flow channel system, it will flow to the water outlet shunt port, and pass through the first water outlet shunt port 9, the second water outlet shunt port 10, the third water outlet shunt port 11 and the fourth water outlet shunt port 12 in sequence. After passing through the water outlet shunt port, it will flow into the water outlet manifold 2, and further cooling will be performed in the water outlet manifold 2. One end of the liquid outlet 4 extends out of the side of the liquid cooling plate, and the other end is communicated with the water outlet manifold 2. When the water flow is collected and buffered in the water outlet manifold 2, it will flow out through the liquid outlet 4.

[0035] Among them, the water inlet manifold 1 and the water outlet manifold 2 are also arranged on the same side of the liquid cooling plate, and the water inlet manifold 1 and the water outlet manifold 2 are located between the liquid inlet 3 and the liquid outlet 4 and the flow channel system. The water inlet manifold 1 and the water outlet manifold 2 are arranged side by side, and a partition is provided between them for separation. And the water outlet manifold 2 is on the side close to the flow channel system. The liquid outlet 4 crosses the water inlet manifold 1, and the water inlet shunt port crosses the water outlet manifold 2. After the water flow passes through the flow channel system, its temperature will rise. When the water flow passes through the water outlet shunt port and enters the water outlet manifold 2, because the water outlet manifold 2 is close to the water inlet manifold 1, the water flow in the water inlet manifold 1 will have a certain cooling effect on the water flow reaching the water outlet manifold 2, so that the water flow reaching the water outlet manifold 2 can reduce the temperature and reduce the temperature rise of the water flow far from the liquid inlet 3. Moreover, the water outlet manifold 2 will also affect the water flow close to the water outlet shunt port but not passing through the water outlet shunt port, causing it to cool down. Therefore, the design of the water inlet manifold 1 and the water outlet manifold 2 being close to each other can further improve the temperature uniformity of the liquid cooling plate, thereby improving the cooling efficiency. In addition, the water inlet manifold 1 and the water outlet manifold 2 are both perpendicular to the flow channel system, which is convenient for the water flow to enter and exit the flow channel system.

[0036] Embodiment 2: In this embodiment, a flow channel system structure adapted to the present utility model is provided. The design of the same parts except the flow channel system in this embodiment is exactly the same as that in Embodiment 1.

[0037] The flow channel system on the liquid cooling plate includes eight cooling channels 13. The cross-sectional areas of the eight cooling channels 13 are exactly the same, and each cooling channel 13 is in an S shape. Every two cooling channels 13 form a flow channel unit, and a total of four flow channel units are provided, namely flow channel unit one, flow channel unit two, flow channel unit three, and flow channel unit four. The heads of the two cooling channels 13 of each flow channel unit are connected to a water inlet shunt port, and the tails are connected to a water outlet shunt port.

[0038] Specifically, the specific flow process of the water flow in the four flow channel units is as follows: In flow channel unit one, after the water flow passes through water inlet shunt port one 5, it enters the cooling channel 13 connected to water inlet shunt port one 5. The water flow passes through an S-shaped route in the two cooling channels 13, turns three bends, and then flows out of the flow channel system through water outlet shunt port one 9; in flow channel unit two, after the water flow passes through water inlet shunt port two 6, it enters the cooling channel 13 connected to water inlet shunt port two 6. The water flow passes through an S-shaped route in the two cooling channels 13, turns three bends, and then flows out of the flow channel system through water outlet shunt port two 10; in flow channel unit three, after the water flow passes through water inlet shunt port three 7, it enters the cooling channel 13 connected to water inlet shunt port three 7. The water flow passes through an S-shaped route in the two cooling channels 13, turns three bends, and then flows out of the flow channel system through water outlet shunt port three 11; in flow channel unit four, after the water flow passes through water inlet shunt port four 8, it enters a group of cooling channels 13 connected to water inlet shunt port four 8. The water flow passes through an S-shaped route in the two cooling channels 13, turns three bends, and then flows out of the flow channel system through water outlet shunt port four 12.

[0039] In addition, in the cooling system described in this embodiment, the cooling channels 13 in the flow channel unit are also arranged in parallel. Among them, each cooling channel 13 is in an S shape, and three bends will occur in each cooling channel 13. Every time a bend occurs, the flow direction of the cooling channel 13 will change by 180°. When the second bend occurs, the water flow is exactly on the side close to the water inlet shunt port. This can enable the cooling channels 13 to evenly cover the entire liquid cooling plate, enabling the water flow to flow through the entire liquid cooling plate more quickly. At the same time, because the cooling channels 13 are closely arranged in parallel, when the water flow flows in the flow channel system for cooling, the cooling is more sufficient and uniform, and the pressure of the water flow in the flow channel can also be reduced, improving the cooling efficiency.

[0040] Embodiment 3: In this embodiment, the length of the liquid cooling plate is twice the length of a normal liquid cooling plate in the prior art. Three parallel crossbeams 14 perpendicular to the cooling channels 13 are provided on the liquid cooling plate. The two ends of the crossbeams 14 are fixed to the liquid cooling plate by bolts. Moreover, a number of equally spaced threaded holes are provided on the crossbeams 14 themselves. Among them, a row of threaded holes is provided on each of the front and rear crossbeams 14, and two rows of threaded holes are provided on the middle crossbeam 14.

[0041] The battery cells are installed on the crossbeam 14 through the cooperation of bolts and threaded holes. Two rows of threaded holes on the middle crossbeam 14 can be respectively mated with the threaded holes on the front and rear beams to install 52 battery cells. Therefore, 104 battery cells can be installed on the entire cold plate. The corresponding relationship with the cooling system is that a set of battery modules corresponds to each flow channel above, ensuring that all battery cells can be evenly and fully cooled, increasing the capacity of the battery cells on a single cold plate, reducing costs, and improving space utilization.

[0042] In addition, both sides of the bottom of the liquid-cooled plate are raised, which can avoid damage to the middle flow channel system due to force and increase the service life of the cold plate. Both sides of the liquid-cooled plate are set to be hollowed out, which is convenient for the installation of rivet nuts, thus reducing the overall weight.

[0043] The following is a detailed description of the overall flow process of the water flow in any one of the cooling channels 13 in the flow channel system:

[0044] After the water flow passes through the liquid inlet 3 protruding from the side of the liquid-cooled plate, it enters the water inlet manifold 1 connected to the liquid inlet 3. After buffering in the water inlet manifold 1, the water flow will be evenly distributed to each water inlet branch. After passing through the water inlet branch, the water flow will enter the cooling channel 13 connected to the water inlet branch. In the cooling channel 13, after passing through three turns along the S-shaped channel, it will reach the water outlet branch. After passing through the water outlet branch, the water flow will enter the water outlet manifold 2. After buffering, it will flow out of the liquid-cooled plate through the liquid outlet 4 connected to the water outlet manifold 2.

[0045] A temperature-equalizing energy storage battery cold plate box body provided by the utility model is provided with a liquid inlet 3, a water inlet manifold 1, a water inlet shunt port, a flow channel system, a water outlet shunt port, a water outlet manifold 2, and a liquid outlet 4 which are connected in sequence; the liquid inlet 3 and the liquid outlet 4 directly extend out of the liquid cooling plate from the same side of the liquid cooling plate. Such a design can save space and ensure the airtightness after the installation of the upper cover on the installation surface; the design that the water inlet manifold 1 and the water outlet manifold 2 are arranged side by side by setting a partition can buffer the water flow entering the flow channel system and flowing out of the liquid cooling plate, slow down the speed of the water flow when flowing into and out of the liquid cooling plate, ensure that the water flow can fully and evenly cool the battery cells. In addition, the water inlet manifold 1 and the water outlet manifold 2 are arranged side by side, which can reduce the temperature rise of the water flow far from the liquid inlet 3, further improve the temperature equalization of the liquid cooling plate, and ensure the cooling efficiency; the design of the water inlet shunt port and the water outlet shunt port makes the water flow flow more smoothly and quickly in the cooling channel 13, improves the cooling efficiency, and at the same time ensures that the water flow can enter and exit the flow channel system evenly; the design of parallel connection between the flow channel units in the flow channel system can shorten the flow path and reduce the temperature rise of the water flow compared with the series design. The S-shaped design of the cooling channel 13 enables the water flow to flow through every place on the liquid cooling plate more fully, and thus can fully cool each battery cell installed on the liquid cooling plate; the lengthening of the length of the liquid cooling plate and the design of the cross beam 14 enable the number of battery cells that can be installed on each cold plate to increase, thereby reducing the cost and improving the utilization rate of space; the two sides of the bottom of the liquid cooling plate are raised, avoiding the stress on the middle flow channel system and increasing the service life of the liquid cooling plate.

[0046] The above-described embodiments are only preferred solutions of the present utility model, and do not impose any form of limitation on the present utility model. There are other variations and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A cold plate box body for a temperature-equalizing energy storage battery, characterized in that It includes a liquid cooling plate which has a flow channel system, an inlet and an outlet. An inlet collecting trough is arranged between the flow channel system and the inlet, and an outlet collecting trough is arranged between the flow channel system and the outlet. The flow channel system includes a number of flow channel units arranged in parallel.

2. The cold plate box body of the temperature-equalizing energy storage battery according to claim 1, characterized in that, The flow channel unit includes a cooling flow channel which is in an S shape.

3. The cold plate box body of the isothermal energy storage battery according to claim 2, wherein, The head end of the cooling flow channel is provided with an inlet water diversion port, and the tail end is provided with an outlet water diversion port. The inlet water diversion port is communicated with the inlet collecting trough, and the outlet water diversion port is communicated with the outlet collecting trough.

4. The isothermal energy storage battery cold plate box according to claim 1 or 2, characterized in that, Two adjacent flow channel units are symmetrically arranged.

5. The isothermal energy storage battery cold plate box according to claim 1 or 2, characterized in that, The inlet is communicated with the inlet collecting trough, and the outlet is communicated with the outlet collecting trough.

6. The cold plate box body of the isothermal energy storage battery according to claim 1 or 2, characterized in that, The inlet collecting trough and the outlet collecting trough are arranged side by side and separated by a partition board therebetween.

7. The cold plate box body of the isothermal energy storage battery according to claim 1 or 2, characterized in that The inlet and the outlet are arranged on the same side of the liquid cooling plate, and the inlet and the outlet directly extend out from the side surface of the liquid cooling plate.

8. The cold plate box body of the temperature-equalizing energy storage battery according to claim 2, characterized in that, There are three parallel crossbeams perpendicular to the cooling flow channels arranged on the liquid cooling plate. Threaded holes are arranged on the crossbeams, and there are two rows of threaded holes on the middle crossbeam.

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