Natural cooling movable energy storage equipment capable of avoiding heat spreading, battery cell and vehicle

Abstract

The invention discloses natural cooling movable energy storage equipment capable of avoiding heat spreading, a battery cell and a vehicle, and the equipment comprises a containing device which is made of an aluminum material and is used for placing the battery cell; the combined structures are installed on the two opposite sides of the containing devices and communicate with the interiors of the containing devices, and the combined structures are used for mutual connection between every two adjacent containing devices; the first cooling assembly is mounted on the combined structure and is arranged in the full-length direction of the combined structure; the second cooling assembly is installed at the bottom of the containing device and also communicates with the interior of the containing device; and when the battery cell emits heat in the accommodating device, the first cooling assembly and the second cooling assembly cool the interior of the accommodating device. Due to the fact that the equipment adopts a natural cooling mode, extra energy consumption is not needed to drive a cooling system, the operation cost of the equipment is reduced, and the technical defect that in the prior art, the cooling cost is too high is overcome.

Description

Technical Field

[0001] The present invention belongs to the field of automobile battery core cooling, and in particular relates to a naturally cooled movable energy storage device, a battery core and a vehicle that can avoid heat spread. Background Art

[0002] During long-term driving of a vehicle, the battery under the vehicle will heat up. In order to avoid safety accidents caused by battery heating, a liquid cooling plate is currently installed at the bottom of the vehicle to cool the battery. The liquid cooling plate is generally divided into two upper and lower aluminum plates. The upper plate is usually called a flat plate, and the lower plate is usually called a guide plate. A flow channel is opened in the lower plate, and the coolant circulates in the flow channel to achieve the purpose of cooling the battery cell.

[0003] Then, when a single battery generates heat, its heat will be transferred to the batteries in adjacent positions, thereby causing thermal runaway of all the cells in the entire battery system, causing unpredictable losses and personal injury. At present, in order to prevent heat from spreading, aerogel insulation pads are usually pasted between the cells. Aerogel insulation pads that are consistent with the large surface size of the cell are pasted between the cells.

[0004] In the above two solutions, since the general pure electric battery system requires at least 5L of coolant, the weight of the whole vehicle increases, the cost is high, and it has a great impact on the air conditioning refrigeration and cooling pump. Specifically, when the cooling pump diverts the low-temperature or high-temperature coolant to the battery system for cooling or heating, it will naturally reduce the power of the air conditioning in the passenger compartment, causing the air conditioning to cool down or heat up slowly, or even the cooling or heating is not obvious, and the passenger experience is poor. At this stage, the commonly used technical solution to solve this problem is to use a higher-power cooling pump for the whole vehicle, increase the size and weight of the pump body, and increase the amount of coolant, which will obviously increase the cost. The solution of pasting aerogel insulation pads between the battery cells is also costly and heavy. At present, the pure electric battery system basically requires about 200 battery cells, which means that about 200 aerogel insulation pads are also needed. In addition, aerogel was previously used as a thermal insulation material used in the aerospace field, and the cost is high, resulting in the final new energy vehicles. Reduced competitiveness in the market. Summary of the invention

[0005] The purpose of the present invention is to provide a naturally cooled mobile energy storage device, a battery cell and a vehicle that avoid heat spread, so as to solve the technical defect of the prior art that the cooling cost is too high when cooling the battery.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a naturally cooled mobile energy storage device for avoiding heat spread is provided, comprising: A receiving device, made of aluminum, for placing the battery cells; A combined structure, installed on two opposite sides of the accommodating device and communicated with the interior of the accommodating device, the combined structure is used to connect two adjacent accommodating devices to each other; A first cooling assembly is installed on the combined structure and arranged along the length of the combined structure; A second cooling assembly is installed at the bottom of the receiving device and is also communicated with the interior of the receiving device; When the battery cell generates heat inside the accommodation device, the first cooling assembly and the second cooling assembly cool the interior of the accommodation device.

[0007] Further, the combined structure includes a first assembly and a second assembly, wherein the first assembly and the second assembly are installed on one side and the other side of the receiving device; The first cooling component includes a right first cooling port and a left first cooling port. The right first cooling port is opened on the first assembly, and the left first cooling port is opened on the second assembly.

[0008] Furthermore, the first assembly and the second assembly are arranged in plurality in sequence and at intervals along the width direction of the receiving device; The relative first assembly and second assembly are of equal height, and the right first cooling opening is arranged inside the first assembly, and the left first cooling opening is arranged inside the second assembly.

[0009] Furthermore, the cross sections of the right first cooling opening and the left first cooling opening are the same.

[0010] Furthermore, the cross-section of the first cooling port on the right side is one of rectangular, triangular, circular or polygonal.

[0011] Furthermore, the second cooling assembly includes a second cooling port, and a plurality of the second cooling ports are arranged along the bottom of the accommodating device.

[0012] Furthermore, the cross section of the second cooling port is rectangular.

[0013] Furthermore, the first assembly is a first assembly board, and the second assembly is a second assembly board. The first assembly board and the second assembly board are installed on one side and the other side of the accommodating device, and a plurality of them are sequentially spaced apart along the width direction of the accommodating device.

[0014] In a second aspect, a battery cell is provided, including a ternary system battery cell and a lithium iron phosphate battery cell, wherein the ternary system battery cell and the lithium iron phosphate battery cell are installed in the natural cooling movable energy storage device for avoiding heat spread as described above.

[0015] According to a third aspect, a vehicle is provided, comprising a vehicle body, on which the battery cell as described above is mounted.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By installing a combined structure on both sides of the accommodating device and arranging the first cooling component on this structure, effective heat extraction is achieved, so that the heat can not only be processed by the second cooling component through the bottom of the accommodating device, but also can be dissipated through the first cooling component on the side, thereby greatly improving the heat dissipation efficiency. At the same time, the first cooling component is arranged along the length of the combined structure to ensure uniform distribution and rapid conduction of heat, avoid the occurrence of local overheating, and eliminate the problem of heat spread between batteries. Secondly, the combined structure allows two adjacent accommodating devices to be easily connected to each other, which not only improves the scalability of the equipment, but also facilitates the transportation, installation and maintenance of the equipment. Finally, since the equipment adopts natural cooling, no additional energy consumption is required to drive the cooling system, thereby reducing the operating cost of the equipment and solving the technical defect of excessively high cooling costs in the prior art.

[0017] 2. By respectively arranging the first assembly and the second assembly on both sides of the accommodating device, and opening the first cooling port on the right side and the first cooling port on the left side, double-sided heat dissipation is achieved, and the heat generated by the battery cell can be more effectively discharged from both sides, thereby improving the heat dissipation efficiency and reducing the temperature of the battery cell, thereby extending the service life of the battery cell and the entire energy storage device. Secondly, the first assembly and the second assembly are not only used as connectors, but also integrate cooling functions, reducing the need for additional cooling components, making the structure of the entire energy storage device more compact, saving space, and facilitating transportation and deployment. The design of the first assembly and the second assembly allows the energy storage device to be easily expanded by increasing or reducing the number of accommodating devices. At the same time, since the cooling port is already integrated in the assembly, there is no need to consider the adaptation of the cooling system during expansion, which simplifies the expansion process.

[0018] 3. By sequentially arranging a plurality of first assemblies and second assemblies at intervals in the width direction of the accommodation device and opening cooling ports therein, a plurality of heat dissipation channels can be formed, which can more effectively conduct the heat generated by the battery cells and disperse it into the surrounding environment, thereby significantly enhancing the heat dissipation effect. Since the heights of the first and second assemblies are equal and the cooling ports are respectively arranged therein, it is possible to ensure uniform distribution of heat inside the accommodation device. This helps to avoid the occurrence of local overheating and improve the efficiency and safety of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 An overall schematic diagram of a naturally cooling mobile energy storage device for avoiding heat spread provided by the present invention; Figure 2 A side view of a naturally cooled movable energy storage device for avoiding heat spread provided by the present invention; Figure 3 A schematic diagram of the operation of the naturally cooling movable energy storage device for avoiding heat spread provided by the present invention.

[0021] Among them: 1. battery cell; 2. receiving device; 3. first cooling port on the right; 4. first assembly; 5. second cooling port; 6. second assembly; 7. first cooling port on the left. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does 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 present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] During long-term driving of a vehicle, the battery under the vehicle will heat up. In order to avoid safety accidents caused by battery heating, a liquid cooling plate is currently installed at the bottom of the vehicle to cool the battery. The liquid cooling plate is generally divided into two upper and lower aluminum plates. The upper plate is usually called a flat plate, and the lower plate is usually called a guide plate. A flow channel is opened in the lower plate, and the coolant circulates in the flow channel to achieve the purpose of cooling the battery cell.

[0028] Then, when a single battery generates heat, its heat will be transferred to the batteries in adjacent positions, thereby causing thermal runaway of all the cells in the entire battery system, causing unpredictable losses and personal injury. At present, in order to prevent heat from spreading, aerogel insulation pads are usually pasted between the cells. Aerogel insulation pads that are consistent with the large surface size of the cell are pasted between the cells.

[0029] In the above two solutions, since the general pure electric battery system requires at least 5L of coolant, the weight of the whole vehicle increases, the cost is high, and it has a great impact on the air conditioning refrigeration and cooling pump. Specifically, when the cooling pump diverts the low-temperature or high-temperature coolant to the battery system for cooling or heating, it will naturally reduce the power of the air conditioning in the passenger compartment, causing the air conditioning to cool down or heat up slowly, or even the cooling or heating is not obvious, and the passenger experience is poor. At this stage, the commonly used technical solution to solve this problem is to use a higher-power cooling pump for the whole vehicle, increase the size and weight of the pump body, and increase the amount of coolant, which will obviously increase the cost. The solution of pasting aerogel insulation pads between the battery cells is also costly and heavy. At present, the pure electric battery system basically requires about 200 battery cells, which means that about 200 aerogel insulation pads are also needed. In addition, aerogel was previously used as a thermal insulation material used in the aerospace field, and the cost is high, resulting in the final new energy vehicles. Reduced competitiveness in the market.

[0030] In order to solve the above technical defects, the inventor provides a naturally cooled mobile energy storage device, a battery cell and a vehicle that avoid heat spread.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1-Figure 3 As shown, in the first aspect of the embodiment of the present invention, a naturally cooled mobile energy storage device is provided to avoid heat spread, including: a container 2, which is a box structure and is made of aluminum material, and is used to place a battery cell 1; a combined structure, which is installed on the opposite sides of the container 2 and is connected to the inside of the container 2, and the combined mechanism is used to connect two adjacent container devices 2; a first cooling component is installed on the combined structure and arranged along the length direction of the combined structure; a second cooling component is installed at the bottom of the container 2 and is also connected to the inside of the container 2; wherein, when the battery cell 1 generates heat inside the container 2, the first cooling component and the second cooling component cool the inside of the container 2. By installing the combined structure on both sides of the container 2 and arranging the first cooling component on this structure, effective heat extraction is achieved, so that the heat can not only be processed by the second cooling component at the bottom of the container 2, but also dissipated by the first cooling component on the side, thereby greatly improving the heat dissipation efficiency. At the same time, the first cooling component is arranged along the length direction of the combined structure, ensuring uniform distribution and rapid conduction of heat, avoiding the occurrence of local overheating, and eliminating the problem of heat spread between batteries. Secondly, the combined structure allows two adjacent accommodating devices 2 to be easily connected to each other, which not only improves the scalability of the device, but also facilitates the transportation, installation and maintenance of the device. Finally, since the device adopts a natural cooling method, no additional energy consumption is required to drive the cooling system, thereby reducing the operating cost of the device and solving the technical defect of high cooling cost in the prior art.

[0032] like Figure 1 and Figure 2As shown, the combined structure includes a first assembly 4 and a second assembly 6, which are installed on one side and the other side of the accommodating device 2; the first cooling assembly includes a right first cooling port 3 and a left first cooling port 7, the right first cooling port 3 is opened on the first assembly 4, and the left first cooling port 7 is opened on the second assembly 6. By arranging the first assembly 4 and the second assembly 6 on both sides of the accommodating device 2, respectively, and opening the right first cooling port 3 and the left first cooling port 7 thereon, double-sided heat dissipation is achieved, and the heat generated by the battery cell 1 can be more effectively guided out from both sides, the heat dissipation efficiency is improved, and the temperature of the battery cell 1 is reduced, thereby extending the service life of the battery cell 1 and the entire energy storage device. Secondly, the first assembly 4 and the second assembly 6 are not only used as connectors, but also integrated with cooling functions, reducing the need for additional cooling components, making the structure of the entire energy storage device more compact, saving space, and facilitating transportation and deployment. The design of the first assembly 4 and the second assembly 6 allows the energy storage device to be easily expanded by increasing or reducing the number of accommodating devices. At the same time, since the cooling port has been integrated into the assembly, there is no need to consider the adaptation of the cooling system during expansion, which simplifies the expansion process. Further, the first assembly 4 and the second assembly 6 are arranged in sequence along the width direction of the accommodating device 2, wherein the relative first assembly 4 and the second assembly 6 are equal in height, and the first cooling port 3 on the right side is arranged inside the first assembly 4, and the first cooling port 7 on the left side is arranged inside the second assembly 6. By arranging a plurality of first assemblies 4 and second assemblies 6 in sequence along the width direction of the accommodating device 2 and opening cooling ports therein, a plurality of heat dissipation channels can be formed, which can more effectively export the heat generated by the battery cell 1 and disperse it into the surrounding environment, thereby significantly enhancing the heat dissipation effect. Since the first assembly 4 and the second assembly 6 are equal in height and the cooling ports are respectively arranged inside them, it is possible to ensure that the heat is evenly distributed inside the accommodating device 2, which helps to avoid the occurrence of local overheating and improve the use efficiency and safety of the battery cell 1.

[0033] like Figure 1 As shown, the cross-sections of the first cooling port 3 on the right and the first cooling port 7 on the left are the same, and the cross-section of the first cooling port 3 on the right is a rectangle, triangle, circle or polygon; the simplified calculation formula of heat dissipation and wind speed is: Ф=p * c * Q * Δ t , Ф is the heat dissipation, p is the air density, c is the specific heat of air at constant pressure, Q is the air flow rate, Δ tTo control the temperature rise. The larger the air flow rate, that is, the larger the heat dissipation Ф, the better the cooling effect of our naturally cooled mobile energy storage device. Then in the same size space, under normal circumstances, when the shape of the cooling port's air cooling channel is a quadrilateral, the air cooling area is the largest, that is, the air flow is the largest, and the cooling effect is the best; when the cooling port's air cooling channel is a triangle, the air cooling area is the smallest, that is, the air flow is the smallest, and the cooling effect is the worst; for other pentagons, hexagons and polygons, the more sides the polygon has, the closer the shape of the cooling port's air cooling channel is to a circle. If the radius is the same, the circle has the largest area relative to the pentagon, hexagon and polygon; therefore, except for triangles and quadrilaterals, the cooling port's air cooling channel shapes of other shapes, such as pentagons, hexagons, polygons and circles, increase with the increase in the number of sides, until the circle has the largest air cooling area and the best cooling effect.

[0034] like Figure 1 and Figure 2 As shown, the second cooling assembly includes a second cooling port 5, and a plurality of the second cooling ports 5 are arranged along the bottom of the receiving device 2. The cross section of the second cooling port 5 is rectangular. The first assembly 4 is a first assembly plate, and the second assembly is a second assembly plate. The first assembly plate and the second assembly plate are installed on one side and the other side of the receiving device 2, and a plurality of them are arranged in sequence along the width direction of the receiving device 2. Figure 3 As shown, when multiple accommodating devices 2 are connected to each other through the first assembly plate and the second assembly plate, they are not limited to being fixed by bolts, but can also be finally bonded by glue, or directly fixed by clamping with the whole vehicle structure. If bolts are used for fixing, only standard bolts can be used for fixing, which is simple to operate, has low requirements on the production line and the operators, and the cost of operating tools for standard bolts is also low.

[0035] If glue is used, the curing time of the glue needs to be considered. At present, the structural glue commonly used in battery systems requires at least 30 minutes of curing time, and there are corresponding requirements for the thickness and amount of glue applied. Therefore, when using glue for bonding, the production line has high requirements, and there are corresponding requirements for the quality of the operators, which need to be strictly implemented according to the work process of glue application. If the whole vehicle structure is directly clamped and fixed, the whole vehicle needs to design a matching clamping structure according to the combined structure of the first combination plate and the second combination plate to ensure that the equipment is fixed stably and reliably. Therefore, the chassis and threshold beam structure of the whole vehicle need to be specifically designed, which may increase the cost and design difficulty of the chassis and threshold beam of the whole vehicle, but at the same time it also simplifies the number of bolts and the amount of glue used, reduces the number of parts in the whole vehicle assembly MBOM, and is conducive to improving the assembly efficiency and reducing the assembly cost of the whole vehicle. In a second aspect, a battery cell is provided, including a ternary system battery cell and a lithium iron phosphate battery cell, wherein the ternary system battery cell and the lithium iron phosphate battery cell are installed in the natural cooling movable energy storage device for avoiding heat spread as described above.

[0036] In a third aspect, a vehicle is provided, comprising a vehicle body, on which the battery cell 1 as described above is mounted.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A naturally cooled mobile energy storage device that avoids heat spread, characterized in that: include: A receiving device (2), made of aluminum material and used for receiving the battery cell (1); A combined structure, installed on two opposite sides of the accommodating device (2) and in communication with the interior of the accommodating device (2), the combined structure being used to interconnect two adjacent accommodating devices (2); A first cooling assembly is installed on the combined structure and arranged along the length of the combined structure; A second cooling assembly is mounted on the bottom of the containing device (2) and is also in communication with the interior of the containing device (2); When the battery core (1) generates heat inside the accommodating device (2), the first cooling component and the second cooling component cool the inside of the accommodating device (2).

2. The naturally cooled movable energy storage device for avoiding heat spread according to claim 1, characterized in that: The combined structure comprises a first assembly (4) and a second assembly (6), wherein the first assembly (4) and the second assembly (6) are installed on one side and the other side of the containing device (2); The first cooling component comprises a first cooling port (3) on the right side and a first cooling port (7) on the left side, wherein the first cooling port (3) on the right side is provided on the first assembly (4), and the first cooling port (7) on the left side is provided on the second assembly (6).

3. The naturally cooled movable energy storage device for avoiding heat spread according to claim 2, characterized in that: A plurality of the first assembly (4) and the second assembly (6) are arranged in sequence and spaced apart along the width direction of the containing device (2); The relative first assembly (4) and second assembly (6) are of equal height, the right first cooling opening (3) is arranged inside the first assembly (4), and the left first cooling opening (7) is arranged inside the second assembly (7).

4. The naturally cooled movable energy storage device for avoiding heat spread according to claim 2 or 3, characterized in that: The cross sections of the right first cooling opening (3) and the left first cooling opening (7) are the same.

5. The naturally cooled movable energy storage device for avoiding heat spread according to claim 4, characterized in that: The cross section of the first cooling opening (3) on the right side is one of a rectangle, a triangle, a circle or a polygon.

6. The naturally cooled movable energy storage device for avoiding heat spread according to claim 1, characterized in that: The second cooling assembly comprises a second cooling port (5), and a plurality of the second cooling ports (5) are arranged along the bottom of the accommodating device (2).

7. The naturally cooled movable energy storage device for avoiding heat spread according to claim 1, characterized in that: The cross section of the second cooling port (5) is rectangular.

8. The naturally cooled movable energy storage device for avoiding heat spread according to claim 1, characterized in that: The first assembly (4) is a first assembly plate, and the second assembly is a second assembly plate. The first assembly plate and the second assembly plate are installed on one side and the other side of the accommodating device (2), and a plurality of them are sequentially spaced apart along the width direction of the accommodating device (2).

9. A battery cell, comprising a ternary system battery cell and a lithium iron phosphate battery cell, characterized in that: The ternary system battery cell and the lithium iron phosphate battery cell are installed in the naturally cooled movable energy storage device for avoiding heat spread as described in any one of claims 1 to 8.

10. A vehicle, comprising a vehicle body, characterized in that: The battery cell according to claim 9 is mounted on the vehicle body.

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