Battery cooling system and battery production line

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cooling system and a battery production line, and the battery cooling system comprises an environmental cover and an airflow accelerating device. According to the battery cooling system with the structure, when the conveying line conveys the tray to move into the environment cover, the conveying line stays, the air supply mechanism conveys cold air into the environment cover, and the airflow accelerating device accelerates flowing of air, so that low-temperature air is directly blown downwards to a battery and flows to the position below the conveying line after exchanging heat with the battery; the battery cooling system can effectively improve the circulation rate of gas and improve the heat dissipation efficiency through negative pressure air return. The temperature of the battery is greatly reduced after heat dissipation of the battery cooling system, the battery is stored in the normal-temperature standing warehouse without influencing other batteries in the warehouse location, the ambient temperature of normal-temperature standing of the battery can be guaranteed, and it is guaranteed that the K value test result of the battery meets the requirement; meanwhile, after the temperature of the battery is reduced, the effective standing time of the normal-temperature standing warehouse cannot be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery cooling system and a battery production line. Background Technology

[0002] On battery production lines, the temperature of trays fully loaded with batteries after high-temperature settling is generally high. This is especially true for large trays of batteries at full capacity, where the large number of batteries, close spacing, and low heat dissipation efficiency are significant. Furthermore, due to continuous production and limited logistics distance, batteries that have undergone high-temperature settling do not receive sufficient cooling time during transport to the ambient temperature settling chamber via the conveyor line, thus being transported to the ambient temperature chamber at a high temperature. This not only prolongs the effective settling time in the ambient temperature chamber but also affects the surrounding low-temperature batteries that have already cooled down for some time. The high-temperature batteries also raise the ambient temperature of the ambient temperature chamber, preventing it from meeting the process requirements for ambient temperature settling and consequently affecting the battery's K-value. Utility Model Content

[0003] In view of this, the present invention provides a battery cooling system and a battery production line to solve the problem that in the prior art, batteries that have been placed at high temperature and then directly enter the room temperature storage chamber at high temperature will have an adverse effect on the formation of batteries in the room temperature storage chamber.

[0004] In a first aspect, this utility model provides a battery cooling system, comprising:

[0005] An environmental cover has a receiving cavity; the top of the environmental cover has an air inlet and the bottom has an air outlet, the air inlet is adapted to be connected to an air supply mechanism, and the air outlet is adapted to be connected to a negative pressure return air mechanism; the environmental cover has a feed inlet and a discharge outlet at both ends along the battery conveying direction; a conveyor line is adapted to pass through the environmental cover through the feed inlet and the discharge outlet, and the conveyor line is adapted to convey a tray containing multiple batteries.

[0006] An airflow acceleration device is disposed between the air inlet and the conveyor line, and the air outlet of the airflow acceleration device faces the tray.

[0007] Beneficial Effects: This battery cooling system connects to the battery conveyor line during operation. The conveyor line passes through an environmental hood via inlets and outlets. A tray containing batteries is placed on the conveyor surface. The conveyor line transports the batteries from a high-temperature settling chamber at the front to a normal-temperature settling chamber at the rear. The batteries in the tray are at a relatively high temperature. When the conveyor line moves the tray into the environmental hood, it stops, and a ventilation mechanism supplies cold air into the hood. An airflow acceleration device accelerates the gas flow, causing the low-temperature gas to blow directly downwards onto the batteries. After heat exchange with the batteries, the low-temperature gas flows downwards along the conveyor line and then exits through the outlet to the negative pressure return air mechanism. The negative pressure return air mechanism effectively increases the gas flow rate, further increasing the airflow velocity between the batteries in the tray, thereby improving the battery heat dissipation efficiency. After the battery cooling is complete, the conveyor line continues to transport batteries. During transport, the batteries undergo heat dissipation and cooling. After being cooled by the battery cooling system, the battery temperature is significantly reduced. Storage of these batteries in the ambient temperature settling chamber does not affect other batteries in the chamber, minimizing the impact of temperature fluctuations and ensuring the chamber temperature remains within the required process range. This guarantees the ambient temperature for battery settling and ensures that the battery's K-value test results meet requirements. Furthermore, the reduced battery temperature does not prolong the effective settling time in the ambient temperature settling chamber. The cooling system simultaneously cools multiple batteries in the tray, greatly improving cooling efficiency. Attached Figure Description

[0008] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram illustrating the cooperation between a battery cooling system, a conveyor line, an air supply mechanism, and a negative pressure return air mechanism according to an embodiment of this utility model.

[0010] Figure 2 This is a first-angle schematic diagram of a battery cooling system according to an embodiment of the present invention;

[0011] Figure 3 This is a second-angle schematic diagram of a battery cooling system according to an embodiment of the present invention;

[0012] Figure 4 This is a cross-sectional view of a battery cooling system according to an embodiment of the present invention.

[0013] Explanation of reference numerals in the attached figures:

[0014] 1. Environmental hood; 11. Feed inlet; 12. Discharge outlet; 13. Cover plate; 2. Air supply mechanism; 3. Negative pressure return air mechanism; 4. Conveyor line; 5. Tray; 6. Airflow acceleration device; 7. Air supply guide hood; 8. Air outlet guide hood. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0017] According to an embodiment of the present invention, a battery cooling system is provided, including an environmental hood 1 and an airflow acceleration device 6.

[0018] The environmental cover 1 has a receiving cavity; the top of the environmental cover 1 is provided with an air inlet and the bottom is provided with an air outlet. The air inlet is suitable for connecting to the air supply mechanism 2 and the air outlet is suitable for connecting to the negative pressure return air mechanism 3; the environmental cover 1 is provided with a feed inlet 11 and a discharge outlet 12 at both ends along the battery conveying direction; the conveyor line 4 is suitable for passing through the environmental cover 1 through the feed inlet 11 and the discharge outlet 12, and the conveyor line 4 is suitable for conveying a tray 5 containing multiple batteries; the airflow acceleration device 6 is provided between the air inlet and the conveyor line 4, and the air outlet of the airflow acceleration device 6 faces the tray 5.

[0019] This battery cooling system connects to the battery conveyor line 4 during operation. The conveyor line 4 passes through the inlet 11 and outlet 12, passing through the environmental hood 1. A tray 5 containing batteries is placed on the conveyor surface of the conveyor line 4. The conveyor line 4 transports the batteries from the high-temperature settling chamber at the front to the ambient-temperature settling chamber at the rear. The batteries in the tray 5 are at a relatively high temperature. When the conveyor line 4 transports the tray 5 into the environmental hood 1, it stops, and the air supply mechanism 2 delivers cold air into the environmental hood 1. The airflow acceleration device 6 accelerates the gas flow, causing the low-temperature gas to blow directly downwards onto the batteries. After exchanging heat with the batteries, the low-temperature gas flows downwards along the conveyor line 4 and then out through the outlet to the negative pressure return air mechanism 3. The negative pressure return air effectively increases the gas flow rate, further increasing the airflow velocity between the batteries in the tray 5, thereby improving the battery's heat dissipation efficiency. After the battery cooling is complete, the conveyor line 4 continues to transport batteries. During transport, the batteries undergo heat dissipation and cooling. After being cooled by the battery cooling system, the battery temperature is significantly reduced. Storage of these batteries in the ambient temperature settling chamber does not affect other batteries in the chamber, minimizing the impact of temperature fluctuations and ensuring the chamber temperature remains within the required process range. This guarantees the ambient temperature for battery settling and ensures that the battery's K-value test results meet requirements. Furthermore, the reduced battery temperature does not prolong the effective settling time in the ambient temperature settling chamber. The cooling system simultaneously cools multiple batteries in the tray, greatly improving cooling efficiency.

[0020] The number of channels on tray 5 is m, and each tray 5 can hold m batteries. The production cycle of batteries on the production line is ppm. The pause time of tray 5 in environmental cover 1 is t = m / ppm. The pause time of conveyor line 4 is equal to the production time of batteries filling tray 5 on the production line. The battery cooling system uses the interval time of battery production cycle to cool the batteries flowing out of the high-temperature settling chamber. It does not increase the additional process time and is conducive to ensuring the production efficiency of batteries.

[0021] In some alternative embodiments, such as Figure 1 As shown, the air supply mechanism 2 includes an air supply duct, and the negative pressure return air mechanism 3 includes a negative pressure return air duct. The air supply duct delivers cold air into the environmental enclosure, and the negative pressure return air duct quickly extracts the heat-exchanged air out of the environmental enclosure 1. The combination of the negative pressure return air duct and the air supply duct can improve the air circulation rate inside the environmental enclosure and improve the heat dissipation effect on the battery.

[0022] Optionally, in some embodiments, a guide plate is provided inside the air supply duct to evenly deliver the low-temperature air into the environmental hood 1. For example... Figures 1 to 3As shown, in some embodiments, the battery cooling system further includes an air supply duct 7 and an air outlet duct 8. The air supply duct 7 is located at the top of the environmental enclosure 1 and communicates with the air inlet, while the air outlet duct 8 is located at the bottom of the environmental enclosure 1 and communicates with the air outlet. The air supply duct 7 is adapted to connect to the air supply mechanism 2, and the air outlet duct 8 is adapted to connect to the negative pressure return air mechanism 3. The air supply duct 7 is located below the air supply pipe and communicates with the air supply pipe. The air supply duct 7 diffuses the cold air in the air supply pipe and delivers it into the environmental enclosure 1, which can increase the coverage area of ​​the cold air on the battery, cool all the batteries in the tray 5, and improve heat dissipation efficiency. The hot air after heat exchange flows to the bottom of the conveyor line 4, and the hot air is gathered by the air outlet duct 8 and flows to the negative pressure return air pipe, which is conducive to the rapid recovery of the hot air after heat exchange.

[0023] like Figure 1 and Figure 4 As shown, in some embodiments, multiple airflow acceleration devices 6 are provided below each airflow guide shroud 7, and the tray 5 rests below the airflow acceleration devices 6 for heat dissipation. The tray 5 contains multiple batteries with small gaps between adjacent batteries. If a large airflow acceleration device 6 were placed above the batteries, it might blow gas directly from the outside of the tray 5 or all the batteries towards the air outlet. By providing multiple airflow acceleration devices 6, each with a smaller blowing range, the uniformity of airflow can be improved, increasing the probability of gas passing through each battery, thereby enhancing the heat dissipation effect.

[0024] Because the gaps between the batteries in the middle of tray 5 are relatively small, the heat dissipation effect of the battery cells in the middle area of ​​the tray is relatively poor. In some optional embodiments, multiple airflow acceleration devices 6 are equally spaced above tray 5. The power of the airflow acceleration device 6 in the middle area of ​​tray 5 is greater than that in other areas, and the wind speed of the airflow acceleration device 6 in the middle area of ​​tray 5 is greater than that in other areas. This arrangement can improve the airflow speed between the batteries in the middle area of ​​the tray and improve the heat dissipation effect of the batteries in the middle area.

[0025] In some other embodiments, the installation height of the airflow acceleration device 6 corresponding to the middle area of ​​the tray 5 is lower than that of the airflow acceleration device 6 in other areas. This arrangement can increase the airflow between the batteries in the middle area of ​​the tray 5, thereby improving the heat dissipation effect of the batteries in the middle area of ​​the tray.

[0026] In some embodiments, the height between the top surface of the battery and the air inlet is H, and the height between the airflow acceleration device 6 and the top surface of the battery is h. If the distance between the airflow acceleration device 6 and the top surface of the battery is too close, the airflow coverage of the airflow acceleration device 6 will be reduced. Therefore, the number of airflow acceleration devices 6 required above the tray will increase, which will lead to an increase in the overall device cost. This configuration ensures the correct height and airflow coverage area for the airflow acceleration device 6, allowing for a reduction in the number of devices and thus optimizing the battery cooling system cost. If the airflow acceleration device 6 is installed too high, its distance from the battery will be too great, weakening the airflow acceleration effect and hindering the improvement of airflow rate between batteries. Therefore, the installation height of the airflow acceleration device 6 should be... This avoids the installation height of the airflow acceleration device 6 and ensures the airflow acceleration effect of the airflow acceleration device 6.

[0027] In other embodiments, multiple airflow acceleration devices 6 are spaced apart above the tray 5. The density of the airflow acceleration devices 6 in the middle area of ​​the tray 5 is greater than the density of the airflow acceleration devices 6 in other areas. This arrangement can increase the airflow between the batteries in the middle area of ​​the tray and improve the heat dissipation effect of the batteries in the middle area.

[0028] like Figure 4 As shown, multiple rows and columns of airflow acceleration devices 6 are spaced apart below each air supply hood 7. The battery cooling system also includes a mounting bracket, which is fixed to the top of the environmental hood 1, and the airflow acceleration devices 6 are mounted on the mounting bracket.

[0029] In some embodiments, the mounting bracket includes two sets of opposing mounting rods. Each set of mounting rods includes two vertical rods and a horizontal rod. The two vertical rods are respectively positioned on the top of the environmental hoods 1 on both sides of the air inlet, and the two ends of the horizontal rods are respectively connected to the vertical rods on both sides. The airflow acceleration device 6 is mounted on the two opposing horizontal rods. The mounting bracket is rod-shaped, which occupies little space and can reduce obstruction to cold air, ensuring that cold air flows smoothly to the battery.

[0030] In some alternative embodiments, the airflow acceleration device 6 includes a fan.

[0031] In some alternative embodiments, such as Figures 1 to 3 As shown, along the gas flow direction (up and down in the figure), the cross-section of the gas flow channel inside the supply air guide hood 7 gradually increases, while the cross-section of the gas flow channel inside the outlet air guide hood 8 gradually decreases. The gradually increasing cross-section of the gas flow channel inside the supply air guide hood 7 facilitates the uniform diffusion of cold air within the supply air guide hood 7, improving the uniformity of cold air distribution after entering the environmental hood 1, thereby improving the uniformity of heat dissipation; the gradually decreasing cross-section of the gas flow channel inside the outlet air guide hood 8 facilitates the guidance of hot air after heat exchange out of the environmental hood 1.

[0032] like Figures 1 to 3As shown, in some embodiments, the air supply hood 7 and the air outlet hood 8 are arranged vertically opposite each other. This arrangement is more conducive to vertical airflow and shortens the airflow path. Moreover, since the tray battery is located below the air supply hood 7, the cold air delivered by the air supply hood 7 must pass through the battery in the tray 5 before entering the air outlet hood 8. This facilitates more complete contact between the cold air and the battery and further improves the heat dissipation efficiency of the battery.

[0033] In other embodiments, the air supply guide 7 and the air outlet guide 8 are vertically offset, and the air outlet guide 8 can be located on the left or right side of the air supply guide 7.

[0034] like Figure 1 As shown, in some embodiments, along the battery transport direction, the environmental cover 1 is provided with multiple air supply guide hoods 7 at intervals, and the air outlet guide hoods 8 are correspondingly arranged with the air supply guide hoods 7; the environmental cover 1 is suitable for accommodating multiple trays 5. There are multiple air supply guide hoods 7, and a set of airflow acceleration devices 6 are arranged below each air supply guide hood 7. The airflow acceleration devices 6 blow cold air downwards so that the area below the air supply guide hood 7 becomes the main heat dissipation area. The trays 5 stay below the air supply guide hood 7. The environmental cover 1 contains multiple trays 5, and the cooling system can dissipate heat from the batteries in multiple trays 5 at the same time, which can greatly improve the heat dissipation efficiency.

[0035] For example, in some embodiments, two air supply ducts 7 are provided at intervals on the environmental cover 1, and the environmental cover 1 can simultaneously cool and dissipate heat on the batteries in the two sets of trays 5, with high heat dissipation efficiency.

[0036] like Figures 2 to 4 As shown, in some embodiments, the environmental hood 1 further includes a cover plate 13, which is closable and located outside the inlet 11 and outlet 12. The cover plate 13 reduces the loss of cold air inside the environmental hood 1, which is beneficial to improving heat dissipation efficiency and the working efficiency of the cooling system. The conveyor line 4 is provided with a conveying surface, which can flow into or out of the environmental hood 1 through the inlet 11 and outlet 12. When the tray 5 enters the environmental hood 1 from the inlet 11, the cover plate 13 at the inlet 11 opens inward; when the tray 5 flows out from the outlet 12, the cover plate 13 at the outlet 12 opens outward.

[0037] Optionally, in some embodiments, the cover plate 13 is hinged to the environmental cover 1, and the two cover plates 13 are respectively connected to the top of the inlet 11 and the top of the outlet 12 of the environmental cover 1.

[0038] In some embodiments, the cover plate 13 is hinged to the environmental cover 1. When the tray 5 is conveyed to the feed inlet 11 via the conveyor line 4, the tray 5 automatically pushes open the cover plate 13 at the feed inlet 11. When the tray 5 is conveyed to the discharge outlet 12, the tray 5 automatically pushes open the cover plate 13 at the discharge outlet 12.

[0039] In other embodiments, an electric cylinder is provided on the environmental cover 1. When the tray approaches the inlet 11 or the outlet 12, the electric cylinder is activated to automatically open the cover 13.

[0040] In some embodiments, the environmental cover 1 is made of transparent acrylic sheet, which facilitates observation of the battery and various components inside the environmental cover 1.

[0041] In some embodiments, the air supply guide 7 and the air outlet guide 8 are integrally formed with the environmental cover 1, and the materials of the air supply guide 7 and the air outlet guide 8 are the same as those of the environmental cover 1.

[0042] According to an embodiment of the present invention, another aspect provides a battery production line, including the aforementioned battery cooling system and conveyor line 4, wherein the conveyor line 4 passes through an environmental hood 1 via an inlet 11 and an outlet 12.

[0043] In this battery production line, conveyor line 4 connects the high-temperature and ambient-temperature storage chambers. A battery cooling system is located between these two chambers. When conveyor line 4 transports tray 5 into the ambient-temperature enclosure 1, it stops. The air supply mechanism 2 delivers low-temperature gas into the enclosure 1, and the airflow acceleration device 6 accelerates the gas flow, causing the low-temperature gas to blow directly downwards onto the batteries. The heated air flows out through the outlet to the negative-pressure return air mechanism 3. The negative-pressure return air effectively increases the gas flow rate and improves heat dissipation efficiency. Cooling occurs during battery transport, significantly reducing battery temperature. Storage in the ambient-temperature storage chamber does not affect other batteries in the chamber, minimizing temperature fluctuations and ensuring the chamber temperature remains within the required range. This guarantees the ambient temperature for battery storage and ensures the battery's K-value meets requirements. Furthermore, the reduced battery temperature does not prolong the effective storage time in the ambient-temperature storage chamber, further improving production line efficiency.

[0044] In some embodiments, multiple battery cooling systems are provided, and these multiple battery cooling systems are arranged at intervals along the conveying direction of the conveyor line 4. Whenever the tray 5 moves into the environmental cover 1 of a battery cooling system, the battery in the tray 5 can be cooled. Multi-site cooling of the battery can improve heat dissipation efficiency and effectively reduce the temperature of the battery. After the battery flows out of the last battery cooling system, its temperature can be reduced from 45°C to 30°C.

[0045] The production line is equipped with N battery cooling systems. Each tray 5 has m channels and can hold m batteries. The battery production cycle time is ppm. The pause time of tray 5 within each battery cooling system is t = m / ppm. The total cooling time for the batteries on the production line is T = t * N = N * m / ppm. Utilizing the intervals between battery production cycles to cool batteries exiting the high-temperature settling chamber avoids adding extra processing time and helps ensure battery production efficiency.

[0046] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery cooling system, characterized in that, include: An environmental cover (1) has a receiving cavity; the top of the environmental cover (1) is provided with an air inlet and the bottom is provided with an air outlet, the air inlet is adapted to be connected to an air supply mechanism (2), and the air outlet is adapted to be connected to a negative pressure return air mechanism (3); the environmental cover (1) is provided with a feed inlet (11) and a discharge outlet (12) at both ends along the battery conveying direction; a conveyor line (4) is adapted to pass through the environmental cover (1) through the feed inlet (11) and the discharge outlet (12), and the conveyor line (4) is adapted to convey a tray (5) containing multiple batteries; An airflow acceleration device (6) is disposed between the air inlet and the conveyor line (4), and the air outlet of the airflow acceleration device (6) faces the tray (5).

2. The battery cooling system according to claim 1, characterized in that, The air supply mechanism (2) includes an air supply pipe, and the negative pressure return air mechanism (3) includes a negative pressure return air pipe.

3. The battery cooling system according to claim 1 or 2, characterized in that, It also includes an air supply guide hood (7) and an air outlet guide hood (8). The air supply guide hood (7) is located at the top of the environmental hood (1) and communicates with the air inlet. The air outlet guide hood (8) is located at the bottom of the environmental hood (1) and communicates with the air outlet. The air supply guide hood (7) is adapted to connect to the air supply mechanism (2). The air outlet guide hood (8) is adapted to connect to the negative pressure return air mechanism (3).

4. The battery cooling system according to claim 3, characterized in that, Multiple airflow acceleration devices (6) are provided below the air supply guide shroud (7).

5. The battery cooling system according to claim 4, characterized in that, Multiple airflow acceleration devices (6) are equally spaced above the tray (5), and the power of the airflow acceleration device (6) in the middle area of ​​the tray (5) is greater than the power of the airflow acceleration device (6) in other areas; And / or, the installation height of the airflow acceleration device (6) corresponding to the middle area of ​​the tray (5) is lower than the installation height of the airflow acceleration device (6) in other areas.

6. The battery cooling system according to claim 4, characterized in that, Multiple airflow acceleration devices (6) are spaced apart above the tray (5), and the arrangement density of the airflow acceleration devices (6) in the middle area of ​​the tray (5) is greater than the arrangement density of the airflow acceleration devices (6) in other areas.

7. The battery cooling system according to claim 6, characterized in that, The height between the airflow acceleration device (6) and the top surface of the battery is h, and the height between the top surface of the battery and the air inlet is H.

8. The battery cooling system according to claim 3, characterized in that, Along the battery conveying direction, the environmental cover (1) is provided with a plurality of air supply guide hoods (7) spaced apart, and the air outlet guide hood (8) is provided corresponding to the air supply guide hood (7); the environmental cover (1) is suitable for accommodating a plurality of trays (5).

9. The battery cooling system according to claim 1 or 2, characterized in that, The environmental cover (1) also includes a cover plate (13), which is openable and closable outside the feed inlet (11) and the discharge outlet (12).

10. A battery production line, characterized in that, The battery cooling system includes any one of claims 1 to 9 and a conveyor line (4), wherein the conveyor line (4) passes through the environmental cover (1) through the inlet (11) and the outlet (12), and the battery cooling system is provided in multiple ways, wherein the multiple battery cooling systems are arranged at intervals along the conveying direction of the conveyor line (4).

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