Battery box body, battery and vehicle

Abstract

The utility model discloses a battery box body, a battery and a vehicle, and belongs to the technical field of batteries. The battery box body comprises a first box body and a second box body, the first box body is provided with a mounting space for mounting a battery cell, the first box body comprises a box body side plate for enclosing the mounting space, a cavity is formed in the box body side plate, an exhaust port is formed in the outer side surface of the box body side plate, grid holes are formed in the inner side surface of the box body side plate, and the grid holes and the exhaust port are arranged in a staggered manner; the grating holes are communicated with the exhaust port through the cavity; and the second box body covers the first box body. The exhaust ports are formed in the side plates of the box body so as to exhaust high-temperature and high-pressure smoke generated when the battery cell is in thermal runaway, the grating holes are formed so that flammable conductive substances such as large metal scraps generated when the battery cell is in thermal runaway can be filtered out, the risk of fire when the conductive substances make contact with air is reduced, the grating holes and the exhaust ports are arranged in a staggered mode, and therefore the safety of the battery cell is improved. Therefore, the conductive substance can be settled in the cavity, and the fire risk is further reduced.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery box, a battery, and a vehicle. Background Art

[0002] New energy power batteries are prone to short - circuit and fire risks in lithium - ion batteries due to external high temperatures, impacts, etc. After the lithium - ion battery is short - circuited, combustible gases and high - temperature conductive substances such as aluminum foil, copper foil, and carbon powder will erupt. Since the inside of the battery pack is a sealed environment, these mixtures of combustible gases and high - temperature aluminum foil, copper foil, and carbon powder do not have the conditions for combustion; when these combustible gases and conductive substances are discharged to the outside of the battery pack through the explosion - proof valve and encounter oxygen in the air, a violent combustion reaction will occur. The high temperature generated by the combustion may further ablate the battery pack box body, and then cause oxygen - containing air to enter the battery pack, ultimately resulting in the complete failure of the entire pack due to fire. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application provides a battery box, a battery, and a vehicle to filter out flammable conductive substances when the battery cells are thermally out of control, reducing the risk of fire caused by the contact of conductive substances with external air.

[0004] In a first aspect, this application provides a battery box, including:

[0005] A first box body having an installation space for installing battery cells. The first box body includes box - body side plates for enclosing the installation space. A cavity is provided inside the box - body side plates, an exhaust port is provided on the outer side surface of the box - body side plates, a grid hole is provided on the inner side surface of the box - body side plates, the grid hole is misaligned with the exhaust port, and the grid hole is communicated with the exhaust port through the cavity;

[0006] A second box body covering the first box body.

[0007] According to the battery box of this application, by providing an exhaust port on the box - body side plates to discharge the high - temperature and high - pressure flue gas generated when the battery cells are thermally out of control, by providing grid holes, large - piece metal debris and other flammable conductive substances generated when the battery cells are thermally out of control can be filtered out, reducing the risk of fire when the conductive substances contact the air. By misaligning the grid holes with the exhaust port, the conductive substances can settle in the cavity, further reducing the risk of fire.

[0008] According to an embodiment of this application, a plurality of exhaust ports are provided on the box - body side plates and are distributed along its length direction, and grid holes are provided between adjacent two exhaust ports.

[0009] According to an embodiment of this application, the minimum distance L between the grid hole and the exhaust port satisfies:

[0010] L≥80mm.

[0011] According to an embodiment of the present application, the grid holes include a plurality of monomer holes, and the plurality of monomer holes are arranged along the length direction of the side plate of the box body. Among them, the width of the monomer hole is adapted to be not greater than the width of the electrode tab of the battery cell in the battery box body.

[0012] According to an embodiment of the present application, a plurality of cavities are arranged in the side plate of the box body along its height direction, and a partition plate is arranged between two adjacent cavities.

[0013] According to an embodiment of the present application, a ventilation port is arranged at a position on the inner side surface of the side plate of the box body opposite to the exhaust port, and a filter element is arranged on the inner side surface of the side plate of the box body to cover the ventilation port.

[0014] According to an embodiment of the present application, the filter element is a groove recessed toward the inside of the battery box body, and through holes arranged in an array are provided on the surface of the groove.

[0015] According to an embodiment of the present application, the radial dimension D of the through hole satisfies:

[0016] 1mm ≤ D ≤ 4mm.

[0017] In a second aspect, the present application provides a battery, including:

[0018] A battery box body according to any one of the technical solutions in the first aspect;

[0019] A plurality of battery cells, installed in the installation space.

[0020] For the battery according to the present application, in addition to having the beneficial effects of the battery box body in the first aspect, by limiting the ratio of the exhaust area of the grid holes to the energy of the battery cells, it is ensured that the smoke can be quickly discharged when the battery cells are thermally out of control, reducing the risk of further spread of thermal runaway.

[0021] In a third aspect, the present application provides a vehicle, including the battery in the second aspect, and the battery is used to provide electrical energy for the vehicle.

[0022] The beneficial effects of the vehicle in the third aspect of the present application are the same as those of the battery in the second aspect, and will not be elaborated here.

[0023] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0025] Figure 1 is a schematic structural diagram of the battery box body provided by the embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of the first box body provided by an embodiment of the present application;

[0027] Figure 3 is a partial structural schematic diagram of the first box body provided by an embodiment of the present application;

[0028] Figure 4 is a schematic cross-sectional structural diagram of the box body side plate provided by an embodiment of the present application;

[0029] Figure 5 is a partial structural schematic diagram of the box body side plate provided by an embodiment of the present application;

[0030] Figure 6 is a schematic structural diagram of the filter element provided by an embodiment of the present application.

[0031] Reference numerals:

[0032] 1. Battery box body; 2. First box body; 21. Installation space; 22. Box body side plate; 221. Cavity; 222. Outer side surface; 223. Exhaust port; 224. Explosion-proof valve; 225. Inner side surface; 226. Grid holes; 227. Ventilation port; 228. Filter element; 229. Partition plate; 3. Second box body. Detailed implementation manners

[0033] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0034] Currently, lithium batteries are mainly used as energy storage devices in the new energy field. Due to the quality defects of lithium batteries themselves or external factors such as high temperature and impact, lithium batteries are prone to short-circuit and fire risks. After a lithium battery short-circuits, combustible gases and high-temperature conductive substances such as aluminum foil, copper foil, and carbon powder will erupt. Since the inside of the battery pack is a sealed environment, these mixtures of combustible gases and high-temperature aluminum foil, copper foil, and carbon powder do not have the conditions for combustion; when these combustible gases and conductive substances are discharged to the outside of the battery pack through the explosion-proof valve and encounter oxygen in the air, they will produce a violent combustion reaction. The high temperature generated by the combustion may further ablate the battery pack box body, thereby causing oxygen-containing air to enter the battery pack, and ultimately leading to the complete fire and failure of the entire pack.

[0035] Generally, the exhaust channels provided in the battery box body cannot filter high-temperature conductive substances such as aluminum foil, copper foil, and carbon powder. These conductive substances mixed with combustible gases are extremely prone to catch fire and burn when encountering air, resulting in a fire-spraying phenomenon after the battery pack gets out of control, causing vehicle body fires and passenger injuries.

[0036] Based on the above considerations, the present application provides a battery box, a battery, and a vehicle, so as to filter out flammable conductive substances during thermal runaway of the battery cells, and reduce the risk of fire caused by the contact of the conductive substances with the outside air.

[0037] The following refers to Figures 1-6 describing the battery box according to an embodiment of the present application.

[0038] Please refer to Figure 1 , the battery box 1 in the embodiment of the present application includes a first box body 2 and a second box body 3.

[0039] The first box body 2 has an installation space 21 for installing battery cells. The first box body 2 includes box body side plates 22 for enclosing the installation space 21.

[0040] By providing the installation space 21 to provide a reliable installation environment for the battery cells, ensuring that the battery cells can be placed safely and stably, the first box body 2 includes box body side plates 22 and a bottom plate. The box body side plates 22 are used to enclose the installation space 21 and provide protection for the side parts of the battery cells.

[0041] The second box body 3 is covered on the first box body 2. The second box body 3 is used in cooperation with the first box body 2 to form a closed battery box 1. The second box body 3 can form a good seal with the first box body 2 to ensure the safety of the battery under normal working and thermal runaway conditions. In this embodiment, the second box body 3 can be covered on the box body side plates 22.

[0042] Please refer to Figure 2 , Figure 3 and Figure 4 , a cavity 221 is provided inside the box body side plate 22. An exhaust port 223 is provided on the outer side surface 222 of the box body side plate 22. A grille hole 226 is provided on the inner side surface 225 of the box body side plate 22. The grille hole 226 is arranged in a dislocation manner with the exhaust port 223. The grille hole 226 is communicated with the exhaust port 223 through the cavity 221.

[0043] It should be noted that the first box body 2 may include a plurality of box body side plates 22, and the plurality of box body side plates 22 jointly enclose to form the installation space 21. In the following description of the present application, one of the plurality of box body side plates 22 provided with the exhaust port 223 and the grille hole 226 is taken as an example for expansion. In another embodiment, the exhaust port 223 and the grille hole 226 may be provided on different box body side plates 22, and the cavities 221 inside different box body side plates 22 are communicated with each other.

[0044] It can be understood that the outer side surface 222 of the box body side plate 22 is the outer surface of the battery box 1, and the inner side surface 225 of the box body side plate 22 is the inner surface of the battery box 1.

[0045] The exhaust port 223 is provided on the outer side surface 222 of the box body side plate 22, and is used to discharge the gas inside the battery box body 1. In the case of thermal runaway, the internal pressure can be released in time to prevent explosion. Among them, please refer to Figure 2 , an explosion-proof valve 224 can be installed at the exhaust port 223 to ensure the sealing of the battery box body 1 during normal battery operation, avoid external air or impurities from entering the battery box body 1, and when the internal pressure of the battery box body 1 increases due to thermal runaway of the battery cells inside the battery box body 1, the explosion-proof valve 224 can be quickly opened to provide a discharge channel for the high-temperature flue gas inside the battery box body 1, reducing the risk of thermal runaway diffusion and explosion.

[0046] The grid holes 226 can filter out flammable conductive substances such as aluminum foil, copper foil, and carbon powder. By arranging the grid holes 226 on the inner side surface 225 of the box body side plate 22, these substances can be prevented from entering the cavity 221 along with the gas and being discharged from the box body, and coming into contact with the external air to cause a fire.

[0047] Please refer to Figure 3 and Figure 4 , the cavity 221 inside the box body side plate 22 is used to isolate the inside and outside of the box, and at the same time provides a channel for the flow of gas. And, by arranging the grid holes 226 and the exhaust port 223 in a staggered manner, and making the grid holes 226 communicate with the exhaust port 223 through the cavity 221, so that after the flue gas enters the box body side plate 22 through the grid holes 226, it needs to pass through a certain distance of the cavity 221 before being discharged from the exhaust port 223. The flammable substances not filtered out by the grid holes 226 can be deposited in the cavity 221, thus playing a further filtering role.

[0048] In actual implementation, when the battery cells inside the battery box body 1 are in thermal runaway, the flue gas generated by the eruption of the battery cells carries flammable substances and flows through the smoke exhaust channel inside the battery box body 1 to the box body side plate 22, and enters the cavity 221 inside the box body side plate 22 through the grid holes 226 on the inner side wall of the box body side plate 22. During this process, part of the flammable substances are filtered by the grid holes 226 and remain inside the battery box body 1, and part of the smaller flammable substances may enter the cavity 221 through the grid holes 226. Because the grid holes 226 and the exhaust port 223 are arranged in a staggered manner, so that after the flue gas rushes into the cavity 221, it first impacts the inner wall of the cavity 221. Under the action of inertia and gravity, the flammable substances impact on the inner wall of the cavity 221 and stop or settle, and then move horizontally along the cavity 221 to the exhaust port 223 to be discharged. During the horizontal movement process, part of the flammable substances settle under the action of gravity, thus greatly reducing the flammable substances in the flue gas finally discharged through the exhaust port 223, and further greatly reducing the risk of fire.

[0049] According to the battery box body 1 provided by the embodiments of the present application, by providing an exhaust port 223 on the box body side plate 22 to discharge the high-temperature and high-pressure flue gas generated during thermal runaway of the battery cells, and by providing grid holes 226, large metal debris and other flammable conductive substances generated during thermal runaway of the battery cells can be filtered out, reducing the risk of fire when the conductive substances come into contact with air. By arranging the grid holes 226 and the exhaust port 223 in a staggered manner, the conductive substances can settle in the cavity 221, further reducing the risk of fire.

[0050] In some embodiments, a filter screen may be provided in the cavity 221 to further improve the filtering effect.

[0051] Please refer to Figure 2 、 Figure 3 and Figure 4 According to some embodiments of the present application, a plurality of exhaust ports 223 distributed along the length direction may be provided on the box body side plate 22, and grid holes 226 may be provided between two adjacent exhaust ports 223.

[0052] The plurality of exhaust ports 223 may be arranged at intervals along the length direction of the box body side plate 22. By providing the plurality of exhaust ports 223, the path and efficiency of gas discharge are increased, ensuring that the gas generated inside the box body can be quickly and evenly discharged during thermal runaway of the battery, avoiding excessive local pressure and reducing the explosion risk. By arranging the plurality of exhaust ports 223 along the length direction of the box body side plate 22, the gas discharge is more uniform, reducing the possibility of local overheating or pressure concentration and improving the overall safety.

[0053] It should be noted that the number of the exhaust ports 223 is not limited herein and is determined according to the design requirements of the battery. Exemplarily, in Figure 3 there are two exhaust ports 223, and correspondingly two explosion-proof valves 224 are provided.

[0054] Wherein, the projection of the grid holes 226 in the thickness direction of the box body side plate 22 is located between two adjacent exhaust ports 223. By providing the grid holes 226 between the two exhaust ports 223, the gas discharged from the exhaust ports 223 will all pass through the filtration of the grid holes 226, and the gas outlet volume of each exhaust port 223 is made uniform, avoiding excessive local pressure at some exhaust ports 223.

[0055] According to some embodiments of the present application, the grid holes 226 include a plurality of single holes, and the plurality of single holes are arranged along the length direction of the box body side plate 22. Among them, the width of the single hole is suitable for not being greater than the width of the electrode tab of the battery cell in the battery box body 1.

[0056] By arranging multiple single holes along the length direction of the box side panel 22 to increase the overall coverage area of ​​the grille hole 226, and when the battery cells at various positions distributed along the length direction of the box side panel 22 have thermal runaway, the path for the exhaust smoke to reach the grille hole 226 is relatively short, thereby improving the exhaust efficiency.

[0057] By setting the width of the single hole to be no greater than the width of the battery cell tab, the probability of large conductive components such as the tab being discharged through the grid hole 226 is reduced, thereby effectively reducing the leakage of flammable substances inside the battery, reducing the risk of external fire, and improving the safety of the battery.

[0058] See also Figure 5 According to some embodiments of the present application, a plurality of cavities 221 distributed along the height direction of the box side panel 22 may be provided in the box side panel 22 , and a partition plate 229 may be provided between two adjacent cavities 221 .

[0059] By providing a plurality of cavities 221 distributed along the height direction in the side panel 22 of the box body and providing partition plates 229 between adjacent cavities 221, the gas discharge path is optimized. Meanwhile, the distribution of the cavities 221 can control the gas discharge more evenly and reduce the accumulation of local pressure during thermal runaway.

[0060] Furthermore, the provision of multiple cavities 221 reduces the flow area of ​​a single cavity 221, and the deposition efficiency of flammable substances in the cavity 221 is higher, thereby improving the filtering effect.

[0061] The provision of multiple cavities 221 can also improve the structural strength of the box side panels 22 and improve the overall safety and stability.

[0062] The number of the cavities 221 is not limited herein. For example, the box side panel 22 may be provided with two cavities 221 distributed along its height direction, and the partition plate 229 may be provided with one.

[0063] See also Figure 5 In some embodiments, the partition plate 229 may be directly opposite to the grille hole 226. In this embodiment, the individual holes of the grille hole 226 may extend along the height direction of the box side plate 22. By making the partition plate 229 directly opposite to the grille hole 226, on the one hand, the structural strength of the grille hole 226 is increased, and at the same time, the individual holes can be divided into multiple parts, thereby increasing the density of the grille hole 226 and reducing the probability of flammable substances passing through the grille hole 226, thereby improving the filtering effect and reducing the risk of fire.

[0064] See also Figure 3 , Figure 4 and Figure 5, According to some embodiments of the present application, an air vent 227 may be provided at a position on the inner surface 225 of the box side plate 22 facing the exhaust port 223, and a filter element 228 covering the air vent 227 may be provided on the inner surface 225 of the box side plate 22.

[0065] The air vent 227 provided at a position on the inner surface 225 of the box side plate 22 facing the exhaust port 223 ensures that gas can flow directly and efficiently from the inside of the box to the exhaust port 223, reducing the resistance of gas flow and helping to improve the efficiency of gas emission. At the same time, through the cooperation of the air vent 227 and the grille holes 226, the pressure relief channels on the inner surface 225 of the box side plate 22 are increased, and the pressure relief is more uniform and stable.

[0066] Covering the filter element 228 outside the air vent 227 can further filter conductive substances in the gas, such as aluminum foil, copper foil, and carbon powder, etc., ensuring that these flammable substances will not be discharged to the outside with the gas, reducing the risk of external fire.

[0067] According to some embodiments of the present application, the minimum distance L between the grille holes 226 and the exhaust port 223 may satisfy: L≥80mm.

[0068] By defining the minimum distance between the grille holes 226 and the exhaust port 223, it is ensured that after the flammable substances in the flue gas pass through the grille holes 226, there is enough distance for sedimentation in the cavity 221, improving the overall filtering effect and reducing the risk of leakage of flammable substances. Moreover, increasing the distance between the grille holes 226 and the exhaust port 223 can effectively improve the structural strength of the box side plate 22 and improve the overall safety and reliability.

[0069] Exemplarily, L may take values of 80mm, 90mm, 100mm, 107mm, 120mm, 128mm or other values not less than 80mm. It can be understood that the maximum value of L can be determined according to the size of the box side plate 22.

[0070] It should be noted here that since the air vent 227 is opposite to the exhaust port 223 and the filter element 228 covers the air vent 227, therefore in Figure 5 , the distance between the filter element 228 and the grille holes 226 is used to represent the distance between the grille holes 226 and the exhaust port 223.

[0071] Please refer to Figure 4 , Figure 5 and Figure 6 , According to some embodiments of the present application, the filter element 228 may be a groove recessed inwardly towards the inside of the battery box 1, and through holes arranged in an array are provided on the surface of the groove.

[0072] By designing the filter element 228 as a groove recessed inwardly of the battery case 1, this structure increases the surface area of the filter element 228 in contact with the gas, which helps to improve the filtration efficiency. At the same time, the recessed design of the groove also helps to capture and contain the filtered flammable substances, preventing them from entering the air flow again. The surface of the groove is provided with through holes arranged in an array, ensuring that when the gas passes through, the conductive substances are effectively blocked while the gas can pass through smoothly, ensuring the uniformity and efficiency of gas discharge and at the same time ensuring the filtration effect.

[0073] In one example, refer to Figure 6 , the groove can be a square groove, the bottom surface of the square groove is directly opposite to the exhaust port 223, the four side walls of the square groove are bent and connected to the bottom surface, and are connected to the inner side surface 225 of the case side plate 22. The bottom surface and the four side walls of the square groove are provided with through holes arranged in an array. Among them, two opposite side walls of the square groove are provided with extension parts extending laterally, and the extension parts are fixedly connected to the case side plate 22 by screws, so that the square groove is fixed on the case side plate 22. Further, the square groove can be made by bending sheet metal, with a simple structure, easy to produce, and low production cost.

[0074] In other examples, the groove can also be in shapes such as rectangular, hemispherical, frustum of a cone, etc., and no specific limitation is made.

[0075] According to some embodiments of the present application, the radial dimension D of the through hole can satisfy: 1 mm ≤ D ≤ 4 mm.

[0076] It should be noted that the cross-sectional shape of the through hole can be circular, square, rectangular, triangular and other shapes, and no specific limitation is made. Taking the cross-sectional shape of the through hole as a circle as an example, the radial dimension of the through hole is the diameter of the through hole. By limiting the diameter of the through hole, it is avoided that the diameter of the through hole is too small to affect the exhaust efficiency and ensure the exhaust efficiency. And it is avoided that the diameter of the through hole is too large, resulting in a poor filtration effect and reducing the fire risk.

[0077] Among them, the value range of the radial dimension D of the through hole is [1 mm, 4 mm]. Exemplarily, D can take values of 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm or other values between 1 mm - 4 mm, and no specific limitation is made.

[0078] The embodiment of the present application also provides a battery.

[0079] The battery includes the battery case 1 of any of the above technical solutions and a plurality of battery cells, and the plurality of battery cells are installed in the installation space 21.

[0080] It should be noted that since the battery in the embodiment of the present application includes the battery box 1 of any of the above technical solutions, it has the technical features and technical effects of the battery box 1 of any of the above technical solutions, which will not be elaborated here.

[0081] Among them, the exhaust area S of the grille hole 226 and the energy Q of the battery cell satisfy: S / Q ≥ 6 mm 2 / Wh.

[0082] It should be noted that the unit of the exhaust area of the grille hole 226 is mm 2 , and the unit of the energy of the battery cell is Wh. The energy of the battery cell can determine the amount of gas that may be released when a battery cell thermal runaway occurs. By defining the relationship between the exhaust area of the grille hole 226 and the energy of the battery cell, it is ensured that in the case of a battery cell thermal runaway, the grille hole 226 can meet the efficiency requirements of gas discharge and reduce the explosion risk.

[0083] By setting the proportional relationship between the exhaust area S of the grille hole 226 and the energy Q of the battery cell, the performance and safety of the battery can be effectively balanced, ensuring that while providing a high energy density, the risks of explosion and fire are reduced.

[0084] In some embodiments, when the battery cell is a lithium iron phosphate battery cell, S / Q ≥ 6 mm 2 / Wh, and S / Q can take values of 6, 7, 8, 9 or other values above 6; further, when the battery cell is a ternary battery cell, S / Q ≥ 10 mm 2 / Wh, and S / Q can take values of 10, 11, 12 or other values above 10.

[0085] The embodiment of the present application also provides a vehicle, which includes the battery of any of the above technical solutions, and the battery is used to provide electric energy for the vehicle.

[0086] The vehicle in the embodiment of the present application includes the battery of any of the above technical solutions, and thus includes the technical features and beneficial effects of the battery of any of the above technical solutions, which will not be elaborated here.

[0087] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0088] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are 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 on the present application.

[0089] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0090] In the description of the present application, the meaning of "a plurality of" is two or more.

[0091] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0092] In the description of the present application, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0093] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0094] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery box, characterized in that: include: A first box body, having an installation space for installing a battery cell, the first box body comprising a box body side panel for enclosing the installation space, a cavity being provided in the box body side panel, an exhaust port being provided on the outer side surface of the box body side panel, a grille hole being provided on the inner side surface of the box body side panel, the grille hole being staggered with the exhaust port, and the grille hole being connected with the exhaust port through the cavity; The second box body is covered on the first box body.

2. The battery box according to claim 1, characterized in that: The side plate of the box body is provided with a plurality of exhaust ports distributed along the length direction thereof, and the grille hole is provided between two adjacent exhaust ports.

3. The battery box according to claim 1, characterized in that: The minimum distance L between the grille hole and the exhaust port satisfies: L≥80mm.

4. The battery box according to claim 1, characterized in that: The grille holes include a plurality of single holes, and the plurality of single holes are arranged along the length direction of the box side plate, wherein the width of the single holes is suitable to be no greater than the width of the battery cell tabs in the battery box.

5. The battery box according to claim 1, characterized in that: A plurality of cavities are arranged in the side plate of the box body and distributed along the height direction thereof, and a partition plate is arranged between two adjacent cavities.

6. The battery case according to any one of claims 1 to 5, characterized in that: An air vent is provided on the inner side surface of the box body side plate at a position directly opposite to the exhaust port, and a filter element covered outside the air vent is provided on the inner side surface of the box body side plate.

7. The battery case according to claim 6, characterized in that: The filter element is a groove body that is recessed toward the inner side of the battery box, and the surface of the groove body is provided with through holes arranged in an array.

8. The battery case according to claim 7, characterized in that: The radial dimension D of the through hole satisfies: 1mm≤D≤4mm.

9. A battery, characterized in that: include: The battery box according to any one of claims 1 to 8; A plurality of battery cells are installed in the installation space; The exhaust area S of the grille hole and the energy Q of the battery cell satisfy: S / Q≥6mm 2 / Wh。 10. A vehicle, characterized in that: Comprising the battery as claimed in claim 9, the battery is used to provide electrical energy to the vehicle.

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