Battery module and vehicle

Abstract

The utility model provides a battery module and a vehicle, and relates to the technical field of battery processing. The battery module comprises a bottom plate, a plurality of first partition plates and a plurality of second partition plates, the first partition plates and the bottom plate are arranged at included angles, the plurality of first partition plates are distributed in parallel along a preset direction, the second partition plates intersect with the plurality of first partition plates, the bottom plate, two adjacent first partition plates and two adjacent second partition plates enclose to form a battery cell compartment, and the battery cell compartment is arranged in the battery cell compartment. And a battery cell is arranged in each battery cell compartment. According to the battery module, the first partition plate and the second partition plate are arranged on the bottom plate to separate the battery cells and block heat conduction between the battery cells, so that the risk of thermal runaway is reduced, and the battery module is simple in structure, low in cost and high in feasibility.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing, and more specifically, to a battery module and a vehicle. Background Art

[0002] With the rapid development of the new energy industry, many commercial vehicles have started using lithium batteries as power, especially in the heavy truck industry, where the share of new energy heavy trucks is increasing continuously. Due to the large load capacity of heavy trucks, in order to ensure the endurance requirement, a large amount of electricity needs to be carried. The energy density of traditional lithium iron phosphate batteries is relatively small, so it is necessary to increase the battery layout space. Therefore, some battery companies consider using ternary batteries with higher energy density to increase the system power as much as possible under the condition of unchanged layout space.

[0003] Because the ternary battery has a high energy density and its internal reaction is relatively active during thermal runaway, there are certain potential safety hazards. To reduce this risk, industry designers provide various protections as much as possible during the battery layout process. Although this method can achieve certain effects, the cost is also relatively high. How to improve the safety of the battery module as much as possible at low cost is a common concern in the industry. Summary of the Utility Model

[0004] The purpose of the present application is to provide a battery module and a vehicle, which can reduce the risk of thermal runaway, have low cost and high feasibility, aiming at the deficiencies in the above-mentioned prior art.

[0005] To achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] On the one hand, an embodiment of the present application provides a battery module, including: a bottom plate, a first partition and a second partition which are respectively arranged at an angle with the bottom plate. The number of the first partitions is multiple, and the multiple first partitions are parallelly distributed along a preset direction. The second partition intersects with the multiple first partitions. The bottom plate, two adjacent first partitions and the second partition enclose a battery cell compartment, and each battery cell compartment is provided with a battery cell.

[0007] Optionally, the plate surfaces of the first partition and the second partition are respectively perpendicular to the plate surface of the bottom plate, and the plate surface of the second partition is parallel to the preset direction.

[0008] Optionally, the second partition is provided with a first avoidance groove. The first partition includes two edge partitions and at least one intermediate partition located between the two edge partitions. The number of the first avoidance grooves is equal to and corresponds one by one to the number of the intermediate partitions.

[0009] Optionally, the bottom plate is provided with a first groove and a second groove. The end of the first partition is matched with the first groove to fix the first partition on the bottom plate, and the end of the second partition is matched with the second groove to fix the second partition on the bottom plate.

[0010] Optionally, a first flanging is provided on a side of the first partition plate facing away from the bottom plate, and a second flanging is provided on a side of the second partition plate facing away from the bottom plate. The first flanging and the second flanging are used to limit the position of the battery cell.

[0011] Optionally, it further includes two side plates disposed at an angle with the bottom plate. The two side plates are respectively located on opposite sides of the plurality of first partition plates to enclose the sides of the battery cell compartment.

[0012] Optionally, a third flanging is provided on the side plate, and the third flanging is used to limit the position of the battery cell.

[0013] Optionally, it further includes a pressure relief component. The pressure relief component includes a main channel and two branch channels respectively communicating with the main channel. The main channel is communicated with an air extraction pump. A plurality of transfer pipes are provided on each branch channel. A pressure relief cover is provided at an end of the transfer pipe away from the branch channel, and the pressure relief cover is adapted to the pressure relief valve of the battery cell.

[0014] Optionally, a smoke and temperature sensor is provided in the main channel and / or the branch channel. The smoke and temperature sensor and the air extraction pump are both electrically connected to the battery management system.

[0015] On the other hand, an embodiment of the present application provides a vehicle, including the battery module as described in any one of the above.

[0016] The beneficial effects of the present application include:

[0017] The present application provides a battery module, including: a bottom plate, a first partition plate and a second partition plate respectively disposed at an angle with the bottom plate. The number of the first partition plates is multiple, and the multiple first partition plates are parallelly distributed along a preset direction. The second partition plate intersects with the multiple first partition plates. The bottom plate, two adjacent first partition plates and the second partition plate enclose a battery cell compartment, and a battery cell is provided in each battery cell compartment. By providing the first partition plate and the second partition plate on the bottom plate, the battery cells are separated from each other, and the heat conduction between the battery cells is blocked, thereby reducing the risk of thermal runaway. The structure is simple, the cost is low and the feasibility is high. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is one of the structural schematic diagrams of the bottom plate, the first partition plate and the second partition plate in the battery module provided by the embodiment of the present application;

[0020] Figure 2 Structural schematic diagram of the battery module provided by the embodiment of the present application;

[0021] Figure 3 Second structural schematic diagram of the bottom plate, the first partition board and the second partition board in the battery module provided by the embodiment of the present application;

[0022] Figure 4 Structural schematic diagram of the bottom plate and the first partition board in the battery module provided by the embodiment of the present application;

[0023] Figure 5 Partial enlarged schematic diagram at position A in FIG. 1;

[0024] Figure 6 Explosion diagram of the battery module provided by the embodiment of the present application;

[0025] Figure 7 Structural schematic diagram of the pressure relief component in the battery module provided by the embodiment of the present application.

[0026] Icon: 10 - battery module; 11 - bottom plate; 111 - first groove; 112 - second groove;

[0027] 12 - first partition board; 121 - edge partition board; 122 - middle partition board; 123 - cross board; 124 - first flanging; 1241 - second avoidance groove; 13 - second partition board; 131 - first avoidance groove; 132 - second flanging; 1321 - through hole; 14 - cell compartment; 15 - cell; 151 - pressure relief valve; 16 - side plate; 161 - third flanging; 17 - pressure relief component; 171 - main channel; 1711 - pressure relief channel interface; 172 - branch channel; 173 - transfer pipeline; 174 - pressure relief cover; 18 - battery management system; F - preset direction. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. It should be noted that, without conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the protection scope of the present application.

[0030] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

[0031] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of this application is customarily placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] On one aspect of the embodiments of the present application, please refer to Figure 1 and Figure 2 , a battery module 10 is provided, including: a bottom plate 11, a first partition 12 and a second partition 13 which are respectively arranged at an angle with the bottom plate 11. The number of the first partitions 12 is multiple, and the multiple first partitions 12 are distributed in parallel along a preset direction F. The second partition 13 intersects with the multiple first partitions 12. The bottom plate 11, two adjacent first partitions 12 and the second partition 13 enclose a battery cell compartment 14, and a battery cell 15 is arranged in each battery cell compartment 14.

[0034] It should be noted that the first partition 12 being arranged at an angle with the bottom plate 11 means that the plate surface of the first partition 12 is not parallel to the plate surface of the bottom plate 11. Similarly, the second partition 13 being arranged at an angle with the bottom plate 11 means that the plate surface of the second partition 13 is not parallel to the plate surface of the bottom plate 11.

[0035] The multiple first partitions 12 and the second partition 13 divide the space above the bottom plate 11 into multiple small spaces, and each small space is a battery cell compartment 14 for accommodating a battery cell 15. After the battery cells 15 are installed in each battery cell compartment 14, the adjacent two battery cells 15 are separated by the first partition 12 or the second partition 13. Therefore, the risk of thermal runaway can be reduced.

[0036] The above battery module 10 separates the cells 15 from each other by providing a first partition 12 and a second partition 13 on the bottom plate 11, blocking the heat conduction between the cells 15, thereby reducing the risk of thermal runaway. The structure is simple, the cost is low and the feasibility is high.

[0037] Optionally, both the first partition 12 and the second partition 13 are heat-insulating and buffering partitions, which have both good heat-insulating ability and certain buffering and compression elastic functions.

[0038] Optionally, the bottom plate 11 is a liquid-cooled plate, and water inlet and outlet interfaces are provided at the ends of the liquid-cooled plate. The liquid-cooled plate is connected to the liquid-cooling pipeline through the water inlet and outlet interfaces. Setting the bottom plate 11 as a liquid-cooled plate can further reduce the risk of thermal runaway.

[0039] Optionally, the bottom plate 11 is rectangular, and sunken holes are respectively provided at the four corners of the bottom plate 11. The sunken holes are used for the installation and fixation of the battery module 10 to the system frame.

[0040] The cells 15 in the battery module 10 are generally rectangular cells 15. In order to better limit the cells 15, preferably, the cell compartment 14 is also rectangular and its size is adapted to the size of the rectangular cell 15. In order to make the cell compartment 14 rectangular, the plate surfaces of the first partition 12 and the second partition 13 should be perpendicular to the plate surface of the bottom plate 11 respectively, and the plate surface of the second partition 13 should be parallel to the preset direction F, and the preset direction F is the length direction of the bottom plate 11.

[0041] The second partition 13 needs to intersect with a plurality of first partitions 12 at the same time to separate a plurality of cell compartments 14. In order to avoid interference between the second partition 13 and the first partition 12, optionally, please refer to Figure 3 and Figure 4 , a first avoidance groove 131 is provided on the second partition 13, and the extending direction of the first avoidance groove 131 is parallel to the plate surface of the first partition 12. The first partition 12 includes two edge partitions 121 and at least one intermediate partition 122 located between the two edge partitions 121. The number of the first avoidance grooves 131 is equal to and corresponds to the number of the intermediate partitions 122 one by one. The second partition 13 is installed from the side of the first partition 12 away from the bottom plate 11, and is inserted on a plurality of intermediate partitions 122 through the first avoidance grooves 131.

[0042] Furthermore, the dimension of the first avoidance groove 131 in the preset direction F is adapted to the thickness of the first partition 12, and the two opposite side surfaces of the second partition 13 in the preset direction F are respectively attached to the plate surfaces of the two edge partitions 121 close to each other, so that the cell compartments 14 formed by enclosing the bottom plate 11, the first partition 12 and the second partition 13 are all enclosed on four sides (only the top and one side are not enclosed).

[0043] In order to facilitate the assembly of the first partition 12 and the second partition 13 with the bottom plate 11, optionally, please refer to Figure 1 and Figure 4 A first groove 111 and a second groove 112 are provided on the bottom plate 11. The end of the first partition 12 cooperates with the first groove 111 to fix the first partition 12 on the bottom plate 11. The end of the second partition 13 cooperates with the second groove 112 to fix the second partition 13 on the bottom plate 11.

[0044] It can be understood that the number of the first grooves 111 is equal to the number of the first partitions 12 and corresponds one to one.

[0045] For example, please refer to Figure 5 The first groove 111 is T-shaped and penetrates two opposite sides of the bottom plate 11, so that the first partition 12 can be inserted into the first groove 111 from the side of the bottom plate 11. A transverse plate 123 is provided at the end of the first partition 12, and the plate surface of the transverse plate 123 is perpendicular to the plate surface of the first partition 12, so that the end of the first partition 12 is T-shaped and matches the size of the first groove 111. The end of the first partition 12 is inserted into the first groove 111 from one side of the bottom plate 11, so that the first partition 12 is fixed on the bottom plate 11.

[0046] For example, please refer to Figure 3 and Figure 4 The second groove 112 is rectangular, and the end of the second partition 13 is also rectangular and matches the size of the second groove 112. The end of the second partition 13 is inserted into the second groove 112 from the top of the bottom plate 11, and the second groove 112 and the plurality of first partitions 12 together fix the second partition 13 on the bottom plate 11.

[0047] Optionally, please refer to Figure 1 A first flange 124 is provided on the side of the first partition 12 facing away from the bottom plate 11 , and a second flange 132 is provided on the side of the second partition 13 facing away from the bottom plate 11 . The first flange 124 and the second flange 132 are used to limit the battery cell 15 .

[0048] The first flange 124 makes the first partition 12 T-shaped, and the second flange 132 makes the top of the second partition 13 T-shaped, so that the top of each battery cell compartment 14 is covered by flanges on three sides. The first flange 124 and the second flange 132 limit the battery cell 15, so the battery cell 15 can only enter and exit the battery cell compartment 14 from the side of the battery cell compartment 14.

[0049] To avoid interference between the second flange 132 and the first flange 124, optionally, a second avoidance groove 1241 is provided in the middle of the first flange 124, and the second avoidance groove 1241 is adapted to the second flange 132. After the second partition 13 is installed, the second flange 132 is inserted into the second avoidance groove 1241.

[0050] To fix the second partition plate 13, optionally, through holes 1321 are provided at both ends of the second flanging 132, and threaded holes are provided on the first partition plate 12. After the bolts pass through the through holes 1321, they are threadedly connected to the threaded holes to fix the second partition plate 13 on the first partition plate 12.

[0051] Optionally, the battery module 10 further includes two side plates 16 arranged at an angle with the bottom plate 11, and the two side plates 16 are respectively located on opposite sides of the plurality of first partition plates 12.

[0052] After the battery cells 15 are loaded from the side of the battery cell compartment 14, the side plates 16 are fixed on the bottom plate 11. The side plates 16 protect the battery cells 15 on the side of the battery module 10 and close the side of the battery cell compartment 14 to limit the battery cells 15 and the first partition plates 12. The side plates 16 can be connected to the bottom plate 11 and the two edge partition plates 121 respectively by means of bolt connection.

[0053] Optionally, a third flanging 161 is provided on the side plate 16, and the third flanging 161 is used to limit the battery cells 15.

[0054] The third flanging 161 cooperates with the second flanging 132 and the first flanging 124, so that there are flangings on the top periphery of each battery cell compartment 14 to prevent the battery cells 15 from jumping during the movement of the battery module 10.

[0055] When the internal thermal runaway occurs in the general battery cell 15, the high-temperature and high-pressure gas inside it will be released from the pressure relief valve 151 of the battery cell 15. Then, after these gases accumulate to a certain pressure in the battery box, they are released through the pressure relief valve 151 in the battery box. Since this process takes a long time, it is not conducive to the timely release of the pressure inside the box.

[0056] Therefore, optionally, please refer to Figure 2 、 Figure 6 and Figure 7 , the battery module 10 further includes a pressure relief component 17, and the pressure relief component 17 is used to collect and release the gas released from the pressure relief valve 151. The pressure relief component 17 includes a main channel 171 and two branch channels 172 respectively communicating with the main channel 171. The main channel 171 is communicated with an air extraction pump, and a plurality of transfer pipes 173 are provided on each branch channel 172. The end of the transfer pipe 173 away from the branch channel 172 is provided with a pressure relief cover 174, and the pressure relief cover 174 is adapted to the pressure relief valve 151 of the battery cell 15.

[0057] The gas flowing out of the pressure relief valve 151 of the battery cell 15 flows into the pressure relief cover 174, and then flows into the branch channel 172 through the transfer pipeline 173, and then flows towards the main channel 171. By starting the external air extraction pump, the high-temperature and high-pressure gas in the main channel 171 can be timely extracted out of the box, reducing the heat accumulation in the box, thereby reducing the risk of thermal runaway of the battery module 10 caused by heat diffusion, and reducing the losses caused by thermal runaway. At the same time, the pressure relief component 17 can also prevent the electrolyte from splashing and causing corrosion and burns to other components.

[0058] Optionally, a pressure relief channel interface 1711 is provided on the main channel 171, and the main channel 171 is communicated with the air extraction pump through the pressure relief channel interface 1711.

[0059] Optionally, a smoke and temperature sensor is provided in the main channel 171 and / or the branch channel 172, and both the smoke and temperature sensor and the air extraction pump are electrically connected to the battery management system 18.

[0060] The signal of the smoke and temperature sensor can be transmitted to the battery management system 18, and the air extraction pump is controlled by the battery management system 18. When the battery management system 18 detects an abnormal signal of the smoke and temperature sensor, the external air extraction pump is started.

[0061] Optionally, the number of smoke and temperature sensors is multiple, and the multiple smoke and temperature sensors are spaced apart and distributed in the main channel 171 and the two branch channels 172.

[0062] This embodiment also provides a vehicle, including the battery module 10 of any one of the above.

[0063] This vehicle includes the same structure and beneficial effects as the battery module 10 in the foregoing embodiment. The structure and beneficial effects of the battery module 10 have been described in detail in the foregoing embodiment and will not be elaborated herein.

[0064] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: include: A bottom plate, a first partition and a second partition respectively arranged at an angle to the bottom plate, the number of the first partitions is multiple, the multiple first partitions are distributed in parallel along a preset direction, the second partition intersects with the multiple first partitions, the bottom plate, the two adjacent first partitions and the second partition enclose a battery cell compartment, and each battery cell compartment is provided with a battery cell.

2. The battery module according to claim 1, characterized in that: The plate surfaces of the first partition plate and the second partition plate are respectively perpendicular to the plate surface of the bottom plate, and the plate surface of the second partition plate is parallel to the preset direction.

3. The battery module according to claim 1, characterized in that: The second partition is provided with a first avoidance groove, the first partition includes two edge partitions and at least one middle partition located between the two edge partitions, and the number of the first avoidance grooves is equal to the number of the middle partitions and corresponds one to one.

4. The battery module according to claim 1, characterized in that: The bottom plate is provided with a first groove and a second groove, the end of the first partition cooperates with the first groove to fix the first partition on the bottom plate, and the end of the second partition cooperates with the second groove to fix the second partition on the bottom plate.

5. The battery module according to claim 1, characterized in that: A first flange is provided on a side of the first partition away from the bottom plate, and a second flange is provided on a side of the second partition away from the bottom plate. The first flange and the second flange are used to limit the battery core.

6. The battery module according to claim 1, characterized in that: It also includes two side plates arranged at an angle with the bottom plate, and the two side plates are respectively located on two opposite sides of the plurality of first partitions to close the side surfaces of the battery cell compartment.

7. The battery module according to claim 6, characterized in that: The side plate is provided with a third flange, and the third flange is used to limit the battery core.

8. The battery module according to any one of claims 1 to 7, characterized in that: It also includes a pressure relief component, which includes a main channel and two branch channels respectively connected to the main channel, the main channel is connected to an air pump, each of the branch channels is provided with a plurality of adapter pipes, and a pressure relief cover is provided at the end of the adapter pipe away from the branch channel, and the pressure relief cover is adapted to the pressure relief valve of the battery cell.

9. The battery module according to claim 8, characterized in that: A smoke temperature sensor is provided in the main channel and / or the branch channel, and the smoke temperature sensor and the air extraction pump are both electrically connected to a battery management system.

10. A vehicle, characterized in that: Comprising the battery module according to any one of claims 1 to 9.

Images