Battery pack and automobile

Abstract

The utility model provides a battery pack and an automobile, the battery pack comprises a battery module, an air cooling module and a controller, the battery module comprises a plurality of battery cell monomers, and the air cooling module comprises an air inlet duct, an air outlet duct, a plurality of cooling air ducts and the like. The cooling air duct is arranged between two adjacent battery cell monomers, the contact area between the cooling air duct and the battery cell monomers is increased, the cooling air duct is divided into a plurality of areas through the partition plates, and the volume of air entering the plurality of areas of the cooling air duct is controlled by controlling the valve plate to rotate relative to the partition plates to correspond to different heating areas of the end faces of the battery cell monomers. Furthermore, the temperatures of a plurality of temperature regions of the single battery cells can be precisely cooled, and the temperature distribution of the single battery cells is uniform. The automobile with the battery pack provided by the utility model solves the problem in the prior art that a cooling system of an automobile battery pack cannot cool different areas of the battery cell monomers, so that the temperature distribution of the battery cell monomers is not uniform, and the safety performance of the automobile is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery thermal management, and in particular relates to a battery pack and a car. Background Art

[0002] As the main energy storage element of new energy vehicles, the on-board power battery pack is one of the key components of new energy vehicles. Its performance and service life have a vital impact on the performance of the entire vehicle. During the operation of new energy vehicles, the temperature of the power battery pack is too high, too low or the temperature difference is too large, which will lead to a decrease in the working efficiency and life of the battery pack. Therefore, an efficient battery thermal management system is an indispensable part of new energy electric vehicles. At present, the common battery pack cooling methods are mainly liquid cooling, direct cooling, and air cooling, but these cooling methods still have shortcomings. For example, the cost of liquid cooling and direct cooling is relatively high. Although the current existing battery packs generally use low-cost air cooling, the cooling effect of air cooling on the battery cell is general, and it cannot accurately cool the heating area of ​​the battery pack. The battery body has the problem of excessive temperature difference, and the existing cooling system cannot adjust the cooling medium flow in real time according to the temperature of the battery pack, which can easily cause the battery pack to be overcooled or overheated.

[0003] In the prior art, for example, the patent with publication number CN206742338U discloses a power battery box and electric vehicle battery with an air-cooling structure. The body of this battery box includes a containing cavity with an air inlet and an air outlet. The setting of the air inlet and the air outlet allows cooling air to enter the containing cavity through the air inlet, flow through the battery module, cool the battery module, and take out the heat emitted by the battery module through the air outlet, that is, the connection between the air inlet and the air outlet forms a channel for cooling air circulation. However, the air-cooling structure of this battery box only increases the contact time between the cooling air and the battery module, and improves the uniformity of the temperature in the battery box. It does not provide a solution to the problem of different heating levels in different areas of the battery cell, and there is still the problem of uneven temperature distribution of the battery cell. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the cooling system of the battery pack cannot cool the temperatures of different areas of the battery cell monomers, which easily leads to uneven temperature distribution of the battery cell monomers.

[0005] To solve the above technical problems, the utility model discloses a battery pack, including a battery module, the battery module includes a plurality of battery cells, and the battery pack also includes an air cooling module; the air cooling module includes an air inlet, an air outlet and a plurality of cooling air ducts; each of the plurality of cooling air ducts is arranged between two adjacent battery cells among the plurality of battery cells; one end of each cooling air duct is connected to the air inlet, and the other end is connected to and connected to the air outlet; wherein each cooling air duct is provided with at least one partition and at least one valve sheet, each of the at least one partition has one end close to and facing the air inlet, and the other end close to and facing the air outlet; and the at least one partition divides the cooling air duct into a plurality of cooling areas, and the plurality of cooling areas correspond to a plurality of areas on the end faces of adjacent battery cells; each of the at least one valve sheet is rotatably connected to an end of one of the partitions close to the air inlet, and can rotate relative to the partition.

[0006] By adopting the above technical solution, the air cooling module cools the battery module according to the heating condition of the battery module to ensure that the temperature of the battery module is controlled within a reasonable temperature range. The air inlet, the air outlet and multiple cooling air ducts, and each cooling air duct is arranged between two adjacent battery cells. One end of each cooling air duct is connected and communicated with the air inlet, and the other end is connected and communicated with the air outlet. The cooling air circulates in this area to cool the end face of the battery cell, thereby increasing the contact area between the cooling air duct and the battery cell, fully cooling and dissipating the battery cell, and preventing the battery cell from overheating and causing thermal runaway. By arranging at least one partition and at least one valve sheet in each cooling air duct, one end of each partition of at least one partition is arranged close to and toward the air inlet, and the other end is arranged close to and toward the air outlet, so that the cooling air duct is divided into multiple cooling areas, and the multiple cooling areas correspond to multiple areas of the end faces of adjacent battery cells, and these cooling areas correspond to multiple heating areas of the end faces of the battery cells. Furthermore, since each valve sheet in at least one valve sheet is rotatably connected to one end of one of the partitions close to the air inlet and can rotate relative to the partition, the amount of air flowing into multiple cooling areas can be controlled by changing the rotation angle of the valve sheet relative to the partition, and the temperature of multiple temperature areas of the battery cell monomer can be precisely cooled to maintain uniform temperature distribution of the battery cell monomer. This solution divides the cooling air duct into multiple areas corresponding to multiple heating areas of the battery cell monomer, and controls the air volume in multiple cooling air ducts in combination with the valve sheet, so as to achieve the effect of temperature control of multiple areas of the battery cell monomer and solve the problem of uneven temperature distribution of the battery cell monomer.

[0007] According to another specific embodiment of the utility model, the extension direction of the air inlet duct and the extension direction of the air outlet duct of the battery pack disclosed in the embodiment of the utility model are parallel to each other, and the air inlet duct and the air outlet duct are arranged on one side of multiple battery cells; each cooling air duct is in an inverted U shape.

[0008] By adopting the above technical solution, the extension direction of the air inlet and the extension direction of the air outlet of the battery pack are arranged parallel to each other, so that the air inlet is connected and communicated with one end of the cooling air duct, the cooling air flows into the air inlet and flows to the cooling air duct, and the air outlet is also connected and communicated with the other end of the cooling air duct, the cooling air flows from the cooling air duct to the air outlet and finally flows out of the air outlet. And each cooling air duct is in an inverted U shape, and the air inlet and the air outlet are arranged on one side of multiple battery cells, that is, the side corresponding to the inverted U-shaped opening, so that the cooling air can be cooled and circulated along the inverted U-shaped path in the cooling air duct.

[0009] According to another specific embodiment of the utility model, the battery pack disclosed in the embodiment of the utility model has at least one partition, which is in an inverted U shape; the partition divides the cooling air duct into two cooling areas, namely an inner area and an outer area, one end of the inner area and one end of the outer area together constitute one end of the cooling air duct, and the other end of the inner area and the other end of the outer area together constitute the other end of the cooling air duct, the inner area corresponds to part or all of the central area of ​​the end face of the battery cell and part of the peripheral area of ​​the end face of the battery cell close to the side where the air inlet and the air outlet are set, and the outer area corresponds to other peripheral areas of the end face of the battery cell; and the number of at least one valve sheet is one, which is arranged at one end of the partition close to the air inlet.

[0010] By adopting the above technical solution, the number of at least one partition in the cooling air duct is set to one, and the shape of the partition is an inverted U shape. Since one end of the partition is close to and facing the air inlet duct, and the other end is close to and facing the air outlet duct, the shape of the partition is set corresponding to the extension direction of the cooling air duct. The cooling air duct is divided into two cooling areas by the partition, namely the inner area and the outer area. One end of the inner area and one end of the outer area together constitute one end of the cooling air duct, and the other end of the inner area and the other end of the outer area together constitute the other end of the cooling air duct, so that the flow direction of the cooling air in the inner area and the outer area is consistent, and the cooling air can flow to the inner area and the outer area in two ways through one end of the cooling air duct, and converge from the other end of the cooling air duct to flow to the air outlet duct. The inner area corresponds to part or all of the central area of ​​the end face of the battery cell and part of the peripheral area of ​​the end face of the battery cell near the side where the air inlet and the air outlet are set, so that the cooling wind in the inner area cools part or all of the central area of ​​the end face of the battery cell and part of the peripheral area of ​​the end face of the battery cell near the side where the air inlet and the air outlet are set, and the outer area corresponds to other peripheral areas of the end face of the battery cell, so that the cooling wind in the outer area cools other peripheral areas of the end face of the battery cell. Since the number of at least one partition is one, the number of at least one valve plate corresponding to the partition is also one, and the partition is set at one end close to the air inlet. When the cooling air flows into the cooling air duct from the air inlet, the valve plate rotates relative to the partition to control the amount of air entering the inner area and the outer area of ​​the cooling air duct, thereby producing different cooling effects on different areas of the end face of the battery cell corresponding to the inner area and the outer area.

[0011] According to another specific embodiment of the present utility model, the area of ​​the two cooling regions of each cooling air duct of the battery pack disclosed in the embodiment of the present utility model corresponds to 85%-90% of the area of ​​the end surface of the adjacent battery cell.

[0012] By adopting the above technical solution, the area of ​​the two cooling regions of each cooling air duct of the battery pack corresponds to 85%-90% of the area of ​​the adjacent battery cell end faces, which can achieve the most efficient cooling effect on the battery cell end faces, wherein the vacant area is the central area of ​​the battery cell end faces.

[0013] According to another specific embodiment of the present utility model, one end of each cooling air duct of the battery pack disclosed in the embodiment of the present utility model that is connected to the air inlet duct is formed with an arc extending away from the air outlet duct.

[0014] By adopting the above technical solution, an arc is formed at one end of each cooling air duct of the battery pack that is connected to the air inlet duct, extending away from the air outlet duct. The arc portion is located in the inner area close to the center of the battery cell and close to the air inlet duct. Since the area of ​​the end face of the battery cell is large, the arc can guide the cooling air. The cooling air is fully distributed in the cooling air duct along the direction of the arc, fully cools the end face of the battery cell, and improves the cooling effect.

[0015] According to another specific embodiment of the present invention, the battery pack disclosed in the embodiment of the present invention further includes a controller, the valve plate is connected to the controller, and the controller controls the valve plate to rotate relative to the partition.

[0016] Using the above technical solution, the battery pack also includes a controller, which can collect and transmit information. The valve plate is connected to the controller, and the controller can issue corresponding instructions to control the valve plate to rotate relative to the partition, so as to achieve different cooling effects in different areas of the end face of the battery cell.

[0017] According to another specific embodiment of the utility model, the battery pack disclosed in the embodiment of the utility model also includes multiple temperature sensors, and a temperature sensor is arranged in each cooling area in each cooling air duct to collect the temperature of the cooling area; the multiple temperature sensors are respectively connected to the controller, and the collected temperature information is transmitted to the controller.

[0018] With the above technical solution, the battery pack also includes multiple temperature sensors, which can collect the temperature in the corresponding area. A temperature sensor is set in each cooling area in each cooling air duct to collect the temperature of the cooling area; the multiple temperature sensors are respectively connected to the controller, and the collected temperature information is transmitted to the controller. When the temperature information meets the conditions for triggering the controller, the controller controls the corresponding components to work.

[0019] According to another specific embodiment of the present utility model, the rotation angle of the valve plate of the battery pack disclosed in the embodiment of the present utility model relative to the end of the partition close to the air inlet duct ranges from ±30° to 50°.

[0020] By adopting the above technical solution, the rotation angle of the valve plate of the battery pack relative to the end of the partition close to the air inlet is in the range of ±30°-50°. When the rotation angle of the valve plate relative to the end of the partition close to the air inlet changes within the range of ±30°-50°, the amount of air entering multiple cooling air ducts from the air inlet also changes accordingly.

[0021] According to another specific embodiment of the utility model, the air cooling module of the battery pack disclosed in the embodiment of the utility model also includes: a blower, an air intake filter, and the air intake filter is connected to the air inlet duct; the blower is arranged at one end of the cooling air duct close to the air outlet duct, and the blower is connected to the controller, and the controller controls the rotation speed of the blower.

[0022] Using the above technical solution, the air cooling module of the battery pack also includes a blower and an air intake filter. The air intake filter is connected to the air inlet duct, so that the impurities carried by the cooling air in the air inlet duct can be filtered out to protect the normal operation of the battery pack. The blower is set at one end of the cooling air duct close to the air outlet duct, so that the blower can absorb the air in the cooling air duct and accelerate the air in the cooling air duct to flow out of the cooling air duct to the air outlet duct, thereby improving the cooling efficiency. The blower is also connected to the controller. According to the temperature value fed back by the temperature sensor, the controller can control the speed of the blower to change as needed.

[0023] According to another specific embodiment of the present utility model, the embodiment of the present utility model discloses an automobile, including an electric drive system, a power supply system and an auxiliary system, wherein the power supply system includes a battery pack.

[0024] By adopting the above technical scheme, a car includes an electric drive system, a power system and an auxiliary system, wherein the power system includes a battery pack. The car with such a battery pack solves the problem in the prior art that the cooling system of the battery pack of the car cannot cool the temperatures of different areas of the battery cells, which easily leads to uneven temperature distribution of the battery cells, thereby improving the safety of the car during operation.

[0025] The beneficial effects of the utility model are:

[0026] The utility model provides a battery pack and a car, wherein the battery pack includes a battery module, an air cooling module, and a controller. The battery module includes a plurality of battery cells. The air cooling module includes an air inlet, an air outlet, a plurality of cooling air ducts, a plurality of temperature sensors, a blower, and an air intake filter. Each cooling air duct is arranged between two adjacent battery cells, thereby increasing the contact area between the cooling air duct and the battery cell cells. The cooling air circulates in the cooling air duct to cool the end faces of the battery cell cells, and the battery cell cells are fully cooled and dissipated to prevent the battery cell cells from overheating and causing thermal runaway. By arranging a partition and a valve sheet that can rotate relative to the partition in the cooling air duct, the cooling air duct is divided into a plurality of areas corresponding to different heating areas of the end faces of the battery cell cells. By controlling the rotation angle of the valve sheet relative to the partition, the air volume entering the plurality of areas of the cooling air duct is controlled, thereby controlling the temperature of the plurality of temperature areas of the battery cell cells to be accurately cooled and the temperature distribution of the battery cell cells to be uniform. The air cooling module detects the temperature of the battery module in real time, and the controller controls the blower speed to accurately control the temperature of the battery module and keep the battery module temperature within the optimal operating temperature range. The battery pack provided by the utility model has the advantages of large cooling area and good cooling effect. The car with such a battery pack solves the problems in the prior art that the air cooling structure of the battery pack of the car has poor cooling effect, the cooling system cannot cool the temperature of different areas of the battery cell, and the temperature distribution of the battery cell is uneven, improves the problem of excessively high or low battery temperature, and improves the safety of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A front view of a battery module and an air cooling module of a battery pack provided in Example 1 of the utility model;

[0028] Figure 2 A top view of a battery module and an air cooling module of a battery pack provided in Example 1 of the utility model;

[0029] Figure 3 for Figure 1 A partial enlarged view showing the flow direction of cooling air;

[0030] Figure 4 for Figure 3 The cross-section along the AA direction;

[0031] Figure 5 This is a structural block diagram of the battery pack provided in Example 1 of the utility model.

[0032] Description of reference numerals:

[0033] 10. Battery module;

[0034] 100. Battery cell monomer;

[0035] 20. Air cooling module;

[0036] 200, air inlet duct; 210, air outlet duct; 220, cooling air duct;

[0037] 2201, partition; 2202, valve plate; 2203, inner area; 2204, outer area; 2205, arc;

[0038] 230, blower; 240, air intake filter;

[0039] 30. Controller. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] In the prior art, the air cooling structure of the battery pack only increases the contact time between the cooling air and the battery module and improves the temperature uniformity inside the battery box. It does not provide a solution to the problem of different heat levels in different areas of the battery cell. The problem of uneven temperature distribution of the battery cell still exists.

[0042] Example 1

[0043] In view of the above problems, the utility model provides a battery pack, such as Figure 1 and Figure 2 As shown, the battery pack includes a battery module 10 and an air cooling module 20, the battery module 10 includes a plurality of battery cells 100, and the air cooling module 20 includes an air inlet duct 200, an air outlet duct 210 and a plurality of cooling ducts 220; Figure 3 As shown, each cooling air duct 220 in the plurality of cooling air ducts 220 is disposed between two adjacent battery cell monomers 100 in the plurality of battery cell monomers 100; one end of each cooling air duct 220 is connected to the air inlet duct 200, and the other end is connected to and communicated with the air outlet duct 210; Figure 4 As shown, each cooling air duct 220 is provided with at least one partition 2201 and at least one valve sheet 2202, one end of each partition 2201 in at least one partition 2201 is arranged close to and toward the air inlet duct 200, and the other end is arranged close to and toward the air outlet duct 210; and at least one partition 2201 divides the cooling air duct 220 into a plurality of cooling areas, and the plurality of cooling areas correspond to a plurality of areas on the end faces of adjacent battery cell monomers 100; each valve sheet 2202 in at least one valve sheet 2202 is rotatably connected to one end of one of the partitions 2201 close to the air inlet duct 200, and can rotate relative to the partition 2201.

[0044] Specifically, the air cooling module 20 cools the battery module 10 according to the heating condition of the battery module 10 to ensure that the temperature of the battery module 10 is controlled within a reasonable temperature range. The air cooling module 20 includes an air inlet duct 200, an air outlet duct 210 and a plurality of cooling air ducts 220, and each cooling air duct 220 is arranged between two adjacent battery cells 100, and one end of each cooling air duct 220 is connected and communicated with the air inlet duct 200, and the other end is connected and communicated with the air outlet duct 210, such as Figure 3 and Figure 4 As shown, the black arrow in the figure indicates the flow direction of the cooling air. The cooling air flows in the air inlet duct 200 located at the bottom of the multiple battery cells 100. Since one end of the cooling air duct 220 is connected to and communicated with the air inlet duct 200, the cooling air flows upward to the cooling air duct 220 and flows along the extension direction of the cooling air duct 220. Since the other end of the cooling air duct 220 is connected to and communicated with the air outlet duct 210, the cooling air continues to flow downward to the air outlet duct 210. The cooling air cools the end surface of the battery cell 100, increases the contact area between the cooling air duct 220 and the battery cell 100, and fully cools and dissipates the heat of the battery cell 100 to prevent the battery cell 100 from overheating and causing thermal runaway. Figure 4 As shown, by setting at least one partition 2201 and at least one valve plate 2202 in each cooling air duct 220, one end of each partition 2201 in at least one partition 2201 is set close to and toward the air inlet duct 200, and the other end is set close to and toward the air outlet duct 210, and the two sides of each partition 2201 are respectively connected to the side surfaces of the corresponding two battery cell monomers 100, thereby dividing the cooling air duct 220 into a plurality of cooling areas, and the plurality of cooling areas correspond to a plurality of areas on the end surfaces of adjacent battery cell monomers 100, and these cooling areas correspond to a plurality of heating areas on the end surfaces of the battery cell monomers 100. It should be noted that the number of partitions 2201 can be one, two, three, four, etc. as needed, which is specifically determined according to the size of the battery cell 100, the number of areas to be divided, etc.; the extension direction of the partition 2201 is determined according to the positions of the air inlet 200 and the air outlet 210. For example, when the air inlet 200 and the air outlet 210 are respectively located on both sides of the battery cell 100, the two ends of the partition 2201 are respectively close to the air inlet 200 and the air outlet 210. At this time, the shape of the partition 2201 can be a straight plate, an S shape, a broken line shape, etc.

[0045] A rotatably connected valve plate 2202 may be provided at one end of each partition plate 2201 close to the air inlet 200, or a valve plate 2202 may be provided at one end of some of the partition plates 2201 close to the air inlet 200. Furthermore, since each valve plate 2202 of at least one valve plate 2202 is rotatably connected to one end of one of the partition plates 2201 close to the air inlet 200 and can rotate relative to the partition plate 2201, the amount of air flowing into different cooling areas can be controlled by changing the rotation angle of the valve plate 2202 relative to the partition plate 2201, and the temperature of multiple temperature areas of the battery cell monomer 100 can be precisely cooled to keep the temperature distribution of the battery cell monomer 100 uniform. This solution divides the cooling air duct 220 into multiple areas corresponding to more than 100 heating areas of the battery cell monomer, and combines the valve plate 2202 to control the air volume in the multiple cooling air ducts 220, so as to achieve the effect of temperature control of more than 100 areas of the battery cell monomer, solve the problem of uneven temperature distribution of the battery cell monomer 100, and reduce the temperature difference between more than 100 areas of the battery cell monomer.

[0046] In one embodiment of the present invention, Figure 2 As shown, the extension direction of the air inlet duct 200 of the battery pack is parallel to the extension direction of the air outlet duct 210. Figure 1 As shown, the air inlet duct 200 and the air outlet duct 210 are arranged on one side of the plurality of battery cells 100; Figure 4 As shown, each cooling air duct 220 is in an inverted U shape.

[0047] Specifically, in this embodiment, the extension direction of the air inlet 200 of the battery pack is arranged parallel to the extension direction of the air outlet 210, so that the air inlet 200 is connected and communicated with one end of the cooling air duct 220, the cooling air flows into the air inlet 200 and flows to the cooling air duct 220, and the air outlet 210 is also connected and communicated with the other end of the cooling air duct 220, the cooling air flows from the cooling air duct 220 to the air outlet 210 and finally flows out of the air outlet 210. And each cooling air duct 220 is in an inverted U shape, the air inlet 200 and the air outlet 210 are arranged on one side of the multiple battery cells 100, that is, the side corresponding to the inverted U-shaped opening, so that the cooling air can be cooled and circulated along the inverted U-shaped path in the cooling air duct 220. It should be noted that the air inlet duct 200 and the air outlet duct 210 can be arranged on the upper part or the bottom part of the plurality of battery cells 100 as required, as long as the air inlet duct 200 and the air outlet duct 210 can be connected to the cooling air duct 220 respectively.

[0048] In one embodiment of the present invention, Figure 4As shown, the battery pack disclosed in the embodiment of the utility model has at least one partition 2201 in an inverted U shape; the partition 2201 divides the cooling air duct 220 into two cooling areas, namely an inner area 2203 and an outer area 2204, one end of the inner area 2203 and one end of the outer area 2204 together constitute one end of the cooling air duct 220, and the other end of the inner area 2203 and the other end of the outer area 2204 together constitute the other end of the cooling air duct 220, the inner area 2203 corresponds to part or all of the central area of ​​the end face of the battery cell 100 and part of the peripheral area of ​​the end face of the battery cell 100 close to the side where the air inlet 200 and the air outlet 210 are set, and the outer area 2204 corresponds to other peripheral areas of the end face of the battery cell 100; and the at least one valve sheet 2202 is one, which is arranged at one end of the partition 2201 close to the air inlet 200. It should be noted that when the air inlet duct 200 and the air outlet duct 210 are arranged at the bottom of a plurality of battery cells 100 , the partition 2201 has an inverted U shape.

[0049] Specifically, by setting the number of at least one partition 2201 in the cooling air duct 220 to one, and setting the shape of the partition 2201 to an inverted U shape, since one end of the partition 2201 is set close to and toward the air inlet duct 200, and the other end is set close to and toward the air outlet duct 210, the shape of the partition 2201 is set corresponding to the extension direction of the cooling air duct 220. The cooling air duct 220 is divided into two cooling areas by the partition 2201, namely the inner area 2203 and the outer area 2204. One end of the inner area 2203 and one end of the outer area 2204 together constitute one end of the cooling air duct 220, and the other end of the inner area 2203 and the other end of the outer area 2204 together constitute the other end of the cooling air duct 220, so that the flow direction of the cooling air in the inner area 2203 and the outer area 2204 is consistent, and the cooling air can flow to the inner area 2203 and the outer area 2204 in two ways through one end of the cooling air duct 220, and merge from the other end of the cooling air duct 220 to the outlet duct 210. Generally, the central area of ​​the battery cell 100 generates more heat, and the peripheral area generates less heat. The inner area 2203 corresponds to part or all of the central area of ​​the end face of the battery cell 100 and part of the peripheral area of ​​the end face of the battery cell 100 on one side close to the air inlet 200 and the air outlet 210, so that the cooling wind in the inner area 2203 cools part or all of the central area of ​​the end face of the battery cell 100 and part of the peripheral area of ​​the end face of the battery cell 100 on one side close to the air inlet 200 and the air outlet 210, and the outer area 2204 corresponds to other peripheral areas of the end face of the battery cell 100, so that the cooling wind in the outer area 2204 cools other peripheral areas of the end face of the battery cell 100. Since the number of at least one partition 2201 is one, the number of at least one valve plate 2202 corresponding to the partition 2201 is also set to one, and the partition 2201 is set at one end close to the air inlet 200. When the cooling air flows from the air inlet 200 into the cooling air duct 220, the valve plate 2202 rotates relative to the partition 2201 to control the amount of air entering the inner area 2203 and the outer area 2204 of the cooling air duct 220, thereby producing different cooling effects on different areas of the end surface of the battery cell 100 corresponding to the inner area 2203 and the outer area 2204.

[0050] In one embodiment of the present invention, Figure 4 As shown, the area of ​​the two cooling regions of each cooling air duct 220 of the battery pack disclosed in the embodiment of the utility model corresponds to 85%-90% of the end surface area of ​​the adjacent battery cell 100 .

[0051] Specifically, the area of ​​the two cooling regions of each cooling air duct 220 of the battery pack corresponds to 85%-90% of the area of ​​the end face of the adjacent battery cell 100, which can achieve the most efficient cooling effect on the end face of the battery cell 100, wherein the vacant area is the central area of ​​the end face of the battery cell 100. Preferably, in order to maximize the cooling area and improve the cooling effect, the area of ​​the two cooling regions of each cooling air duct 220 of the battery pack corresponds to 90% of the area of ​​the end face of the adjacent battery cell 100.

[0052] In one embodiment of the present invention, Figure 4 As shown, an arc 2205 extending away from the air outlet 210 is formed at one end of each cooling air duct 220 of the battery pack disclosed in the embodiment of the present utility model that is connected to the air inlet duct 200 .

[0053] Specifically, an arc 2205 extending away from the air outlet 210 is formed at one end of each cooling air duct 220 of the battery pack that is connected to the air inlet duct 200. The arc 2205 is located in the inner area 2203 close to the center of the battery cell 100 and close to the air inlet duct 200. Since the end face of the battery cell 100 has a large area, the arc 2205 can be provided to guide the cooling air. The cooling air is fully distributed in the cooling air duct 220 along the direction of the arc 2205, so the end face of the battery cell 100 is fully cooled. It should be noted that when the air inlet duct 200 and the air outlet duct 210 are arranged at the bottom of multiple battery cells 100, the shape of the partition 2201 is an inverted U shape, and the cooling air flows upward from the air inlet duct 200 into the inner area 2203 and the outer area 2204 of the cooling air duct 220, flows through the entire cooling air duct 220 along the extension direction of the arc 2205, and after fully cooling multiple sides of the battery cell 100, flows downward along the extension direction of the inverted U-shaped partition 2201 out of the cooling air duct 220 and flows to the air outlet duct 210.

[0054] In one embodiment of the present invention, the battery pack disclosed in the embodiment of the present invention further includes a controller 30 , the valve plate 2202 is connected to the controller 30 , and the controller 30 controls the valve plate 2202 to rotate relative to the partition 2201 .

[0055] Specifically, the battery pack also includes a controller 30 , which can collect and transmit information. The valve plate 2202 is connected to the controller 30 , so that the controller 30 can issue corresponding instructions to control the valve plate 2202 to rotate relative to the partition 2201 .

[0056] In one embodiment of the utility model, the battery pack disclosed in the embodiment of the utility model also includes multiple temperature sensors (not shown in the figure), and a temperature sensor is arranged in each cooling area in each cooling air duct 220 to collect the temperature of the cooling area; the multiple temperature sensors are respectively connected to the controller 30, and the collected temperature information is transmitted to the controller 30.

[0057] Specifically, the battery pack also includes a plurality of temperature sensors, which can collect the temperature in the corresponding area. A temperature sensor is set in each cooling area of ​​each cooling air duct 220 to collect the temperature of the corresponding cooling area; the plurality of temperature sensors are respectively connected to the controller 30, and the collected temperature information is transmitted to the controller 30. When the temperature information meets the conditions for triggering the controller 30, the controller 30 controls the corresponding components to work. It should be noted that when there is one partition plate 2201 and one valve plate 2202 in each cooling air duct 220, the cooling air duct 220 is divided into an inner area 2203 and an outer area 2204, and a temperature sensor is set in each of the inner area 2203 and the outer area 2204, so that the temperature sensor detects the temperature values ​​in the inner area 2203 and the outer area 2204, and the measured temperature value of the inner area 2203 is marked as T1, and the temperature value of the outer area 2204 is marked as T2, and the collected temperature values ​​of T1 and T2 are transmitted to the controller 30.

[0058] In one embodiment of the present invention, Figure 4 As shown, the rotation angle of the valve plate 2202 of the battery pack disclosed in the embodiment of the utility model relative to the end of the partition 2201 close to the air inlet duct 200 ranges from ±30° to 50°.

[0059] Specifically, the rotation angle range of the valve plate 2202 of the battery pack relative to one end of the partition plate 2201 close to the air inlet duct 200 is ±30° - 50°. When the rotation angle of the valve plate 2202 relative to one end of the partition plate 2201 close to the air inlet duct 200 varies within the range of ±30° - 50°, the magnitude of the air volume entering the plurality of cooling ducts 220 from the air inlet duct 200 also changes accordingly. It should be noted that when the number of partition plates 2201 in each cooling duct 220 is one and the number of valve plates 2202 is one, the cooling duct 220 is divided into an inner region 2203 and an outer region 2204. The inner region 2203 corresponds to a part or all of the central region of the end face of the battery cell unit 100 and a part of the outer peripheral region of the end face of the battery cell unit 100 close to the side where the air inlet duct 200 and the air outlet duct 210 are provided. The outer region 2204 corresponds to the other peripheral regions of the end face of the battery cell unit 100. A temperature sensor is provided in both the inner region 2203 and the outer region 2204. Thus, the temperature sensor detects the temperature values in the inner region 2203 and the outer region 2204. The measured temperature value of the inner region 2203 is marked as T1, and the temperature value of the outer region 2204 is marked as T2. The rotation angle of the valve plate 2202 is α. The collected temperature values T1 and T2 are transmitted to the controller 30. When T1 > T2, the angle α of the valve plate 2202 is adjusted to be < 0, that is, one end of the valve plate 2202 relative to the partition plate 2201 rotates towards the outer region 2204, and the air volume in the inner region 2203 increases; when T1 < T2, the angle α of the valve plate 2202 is adjusted to be > 0, that is, one end of the valve plate 2202 relative to the partition plate 2201 rotates towards the inner region 2203, and the air volume in the outer region 2204 increases. By changing the rotation of the angle α of the valve plate 2202 within the range of ±30° - 50°, the air volumes in the inner region 2203 and the outer region 2204 are controlled, thereby balancing the temperatures in the inner region 2203 and the outer region 2204, and finally achieving the effect of uniform temperature of the battery cell unit 100 and reducing the temperature difference between the battery cell unit 100 and different heat generation regions corresponding to the inner region 2203 and the outer region 2204.

[0060] In one embodiment of the present utility model, as Figure 5 shown, the air cooling module 20 of the battery pack disclosed in the embodiment of the present utility model further includes: a blower 230 and an air intake filter element 240. The air intake filter element 240 is connected to the air inlet duct 200; the blower 230 is arranged at one end of the cooling duct 220 close to the air outlet duct 210, and the blower 230 is connected to the controller 30, and the controller 30 controls the rotation speed of the blower 230.

[0061] Specifically, the air cooling module 20 of the battery pack also includes a blower 230 and an air intake filter 240. The air intake filter 240 is connected to the air inlet duct 200, so that the impurities carried by the cooling air in the air inlet duct 200 can be filtered out to protect the normal operation of the battery pack. The blower 230 is set at one end of the cooling air duct 220 close to the air outlet duct 210, so that the blower 230 can absorb the air in the cooling air duct 220, accelerate the air in the cooling air duct 220 to flow out of the cooling air duct 220 to the air outlet duct 210, and improve the cooling efficiency. In addition, the blower 230 is connected to the controller 30. According to the temperature value fed back by the temperature sensor, the controller 30 can control the speed of the blower 230 to change as needed. It should be noted that a control signal interface is reserved in the controller 30 for transmitting and obtaining signals, so that the controller 30 can receive temperature signals and control the speed of the blower 230, improve the problem of the battery temperature being too high or too low, and keep the battery temperature in the optimal temperature range.

[0062] Next, combine Figure 2-Figure 5 The use of the air cooling module 20 of the battery pack provided by the utility model during operation is described as follows:

[0063] like Figure 2 As shown, the air inlet duct 200 and the air outlet duct 210 are arranged at the bottom of the battery module 10 in parallel with the extending direction thereof. Figure 3-Figure 4As shown, the cooling air flows upward from the air inlet duct 200 into the cooling duct 220. The number of internal partitions 2201 in the cooling duct 220 is one, and the number of valve plates 2202 is one. The cooling duct 220 is divided into an inner region 2203 and an outer region 2204. The cooling air flows into the inner region 2203 and the outer region 2204 respectively along the extension direction of the partition 2201 to cool the partial central region and the peripheral region of the battery cell 100. A temperature sensor is provided in each of the inner region 2203 and the outer region 2204. Thus, the temperature sensors detect the temperature values in the inner region 2203 and the outer region 2204. The measured temperature value of the inner region 2203 is marked as T1, and the temperature value of the outer region 2204 is marked as T2. The rotation angle of the valve plate 2202 is α. The collected temperature values of T1 and T2 are transmitted to the controller 30. When T1 > T2, the angle α of the valve plate 2202 is adjusted to be less than 0, that is, one end of the valve plate 2202 relative to the partition 2201 rotates toward the outer air duct, and the air volume in the inner region 2203 increases; when T1 < T2, the angle α of the valve plate 2202 is adjusted to be greater than 0, that is, one end of the valve plate 2202 relative to the partition 2201 rotates toward the inner air duct, and the air volume in the outer region 2204 increases. By changing the angle α of the valve plate 2202 to rotate within the range of ±30° - 50°, the air volumes in the inner region 2203 and the outer region 2204 are controlled, thereby balancing the temperatures in the inner region 2203 and the outer region 2204. Finally, the temperature of the battery cell 100 is made uniform, and the temperature difference of the battery cells is reduced. After the cooling is completed, the cooling air converges at one end where the cooling duct 220 is connected to the air outlet duct 210 and flows toward the air outlet duct 210.

[0064] Further, as Figure 5As shown in the figure, the intake air filter element 240 of the air-cooled module 20 is connected to the intake air duct 200. The battery module 10 is respectively connected to the intake air duct 200 and the exhaust air duct 210. The blower 230 is arranged at one end of the cooling air duct 220 close to the exhaust air duct 210, and the blower 230 is connected to the controller 30. The controller 30 controls the rotation speed of the blower 230. A control signal interface is reserved in the controller 30 for transmitting and acquiring signals, so that the controller 30 can receive temperature signals and control the rotation speed of the blower 230, improving the problem of too high or too low battery temperature, and keeping the battery temperature always within the optimal temperature range. The highest temperature of the battery module 10 is T. The optimal operating temperature of the battery module 10 is preset in the temperature sensor as T0 to T1. The rotation speed signal n' transmitted by the controller 30 to the blower 230, the current rotation speed of the blower 230 is n. The temperature sensor is used to detect the highest temperature T of the battery module 10 and transmit the temperature signal to the controller 30. If T>T1, the rotation speed signal n' transmitted by the controller 30 to the blower 230>the current rotation speed n, the rotation speed of the blower 230 increases, and the air volume in the air-cooled module 20 increases; if T<T0, the rotation speed signal n' transmitted by the controller 30 to the blower 230<the current rotation speed n, the rotation speed of the blower 230 decreases, and the air volume in the air-cooled module 20 decreases; if T0<T<T1, the rotation speed of the blower 230 remains unchanged, and the air volume in the air-cooled module 20 remains unchanged. By controlling the rotation speed of the blower 230, the air volume in the air-cooled module 20 is controlled, and further the temperature of the battery module 10 is controlled within a suitable operating range. When the temperature sensor detects that the temperature of the battery module 10 exceeds the optimal operating temperature, the blower 230 increases the rotation speed to quickly cool the battery module 10; when the temperature of the battery module 10 is lower than the optimal operating temperature, the blower 230 decreases the rotation speed, while reducing energy consumption, ensuring that the battery module 10 is within the optimal operating temperature range.

[0065] Embodiment 2

[0066] The present utility model further provides an automobile, including an electric drive system, a power supply system and an auxiliary system. The power supply system includes the battery pack provided in Embodiment 1.

[0067] Specifically, in this embodiment, an automobile including a power supply system including a battery pack and other systems can accurately cool the temperatures of more than 100 temperature regions of the battery cell 100, keep the temperature distribution of the battery cell 100 uniform, solve the problem in the prior art that the cooling system of the battery pack of the automobile cannot cool the temperatures of different regions of the battery cell 100 and easily causes non-uniform temperature distribution of the battery cell 100, and improves the safety during the operation of the automobile.

[0068] It should be noted that, in addition to the implementation methods of the utility model described in the above-mentioned specific specific embodiments, those skilled in the art can easily understand other advantages and functions of the utility model from the contents disclosed in this specification. Although the description of the utility model will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide a deep understanding of the utility model, the following description will include many specific details. The utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0069] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0070] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0071] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0072] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A battery pack, comprising a battery module, wherein the battery module comprises a plurality of battery cells, characterized in that: The battery pack also includes an air cooling module; The air cooling module includes an air inlet duct, an air outlet duct, and a plurality of cooling air ducts; Each of the plurality of cooling air ducts is disposed between two adjacent battery cell monomers of the plurality of battery cell monomers; one end of each cooling air duct is connected to and communicated with the air inlet duct, and the other end of each cooling air duct is connected to and communicated with the air outlet duct; in At least one partition and at least one valve sheet are provided in each of the cooling air ducts, one end of each of the at least one partition is arranged close to and toward the air inlet duct, and the other end is arranged close to and toward the air outlet duct; and the at least one partition divides the cooling air duct into a plurality of cooling areas, and the plurality of cooling areas correspond to a plurality of areas of the adjacent end surfaces of the battery cell monomers; Each valve sheet of the at least one valve sheet is rotatably connected to one end of one of the partitions close to the air inlet duct and can rotate relative to the partition.

2. The battery pack according to claim 1, characterized in that: The extension direction of the air inlet duct is parallel to the extension direction of the air outlet duct, and the air inlet duct and the air outlet duct are arranged on one side of the plurality of battery cell monomers; each of the cooling air ducts is in an inverted U shape.

3. The battery pack according to claim 2, characterized in that: The at least one partition is one in number and is in an inverted U shape; the partition divides the cooling air duct into two cooling areas, namely an inner area and an outer area; and One end of the inner region and one end of the outer region together constitute one end of the cooling air duct, and the other end of the inner region and the other end of the outer region together constitute the other end of the cooling air duct, the inner region corresponds to part or all of the central region of the end face of the battery cell and part of the peripheral region of the end face of the battery cell close to the side where the air inlet and the air outlet are set, and the outer region corresponds to other peripheral regions of the end face of the battery cell; The at least one valve sheet is provided in one piece and is arranged at one end of the partition plate close to the air inlet duct.

4. The battery pack according to claim 3, characterized in that: The areas of the two cooling regions of each cooling air channel correspond to 85%-90% of the areas of the adjacent end surfaces of the battery core monomers.

5. The battery pack according to claim 3, characterized in that: One end of each cooling air duct connected to the air inlet duct is formed in an arc shape extending away from the air outlet duct.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The battery pack further includes a controller, the valve plate is connected to the controller, and the controller controls the valve plate to rotate relative to the partition.

7. The battery pack according to claim 6, characterized in that: The air cooling module further includes a plurality of temperature sensors, wherein a temperature sensor is provided in each cooling area in each cooling air duct for collecting the temperature of the cooling area; The multiple temperature sensors are connected to the controller respectively, and transmit the collected temperature information to the controller.

8. The battery pack according to claim 7, characterized in that: The rotation angle of the valve plate relative to the end of the partition close to the air inlet duct ranges from ±30° to 50°.

9. The battery pack according to claim 8, characterized in that: The air cooling module further comprises: a blower and an air intake filter element, wherein the air intake filter element is connected to the air intake duct; The blower is arranged at one end of the cooling air duct close to the air outlet duct, and the blower is connected to the controller, and the controller controls the rotation speed of the blower.

10. An automobile, comprising an electric drive system, a power supply system and an auxiliary system, characterized in that: The power supply system comprises a battery pack as described in any one of claims 1-9.

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