Battery cases, battery cells, batteries and power consumption devices

Abstract

This application discloses a battery case (1), a battery cell (3), a battery (100), and an electric power consuming device. The battery case (1) includes a housing (11) having a protrusion-corresponding area (111) at its bottom for facing a protrusion (41) of a bottom plate (4) of the battery (100), and an explosion-proof valve (12) installed in a non-protrusion-corresponding area (112) at the bottom of the housing (11).

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on February 22, 2022, bearing application number 202220361886.2, and entitled "Battery case, battery cell, battery, and power consumption device," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of battery technology, and more particularly to battery cases, battery cells, batteries, and power consuming devices. [Background technology]

[0003] A secondary battery can be charged and discharged, and when the secondary battery is subjected to the following conditions, such as overcharging, piercing of a plate by a metal conductor, or hot box testing, heat and gas will rapidly accumulate inside the secondary battery, which will increase the internal pressure of the secondary battery and, in serious cases, cause the secondary battery to expand and explode.

[0004] Secondary batteries are used in passenger cars, and their safety performance is related to the safety of passengers' lives. Therefore, how to enhance the safety performance of secondary batteries is an issue that needs to be resolved quickly. Summary of the Invention [Problem to be solved by the invention]

[0005] One of the purposes of the embodiments of the present application is to solve the technical problem of poor safety performance of batteries in the related art by providing a battery case, a battery cell, a battery, and a power consuming device. [Means for solving the problem]

[0006] In order to solve the above technical problems, the technical solutions adopted in the embodiments of the present application are as follows:

[0007] According to a first aspect, the present application provides a battery case for use with a battery cell, comprising a housing and an anti-explosion valve, the bottom of the housing having a protrusion-corresponding area and a non-protrusion-corresponding area, the protrusion-corresponding area being positioned opposite the protrusion on the bottom plate of the battery, and the non-protrusion-corresponding area being positioned offset from the protrusion on the bottom plate of the battery, and the anti-explosion valve being positioned in the non-protrusion-corresponding area.

[0008] The beneficial effects of the battery case according to the embodiment of the present application are as follows: The battery case according to the embodiment of the present application has a protrusion-matching area on the bottom of the housing that faces the protrusion on the battery's bottom plate and a non-protrusion-matching area that is offset from the protrusion on the battery's bottom plate, and the explosion-proof valve is installed in the non-protrusion-matching area. Because the non-protrusion-matching area is offset from the protrusion on the battery's bottom plate, i.e., the explosion-proof valve does not correspond to the protrusion on the battery's bottom plate, i.e., the protrusion on the battery's bottom plate does not shield the explosion-proof valve, the protrusion on the battery's bottom plate does not affect the normal exhaust of the explosion-proof valve. When thermal runaway occurs in the battery core and the internal pressure of the battery core exceeds a predetermined value, because the explosion-proof valve is installed in the non-protrusion-matching area, the protrusion on the battery's bottom plate does not affect the exhaust of the explosion-proof valve, thereby avoiding the problem of the explosion-proof valve not venting smoothly and allowing the gas inside the battery to be exhausted, thereby preventing battery explosion, reducing potential safety risks, and improving safety.

[0009] In some embodiments, the protrusion-accommodating area is located in a middle area of ​​the bottom of the housing, with non-protrusion-accommodating areas on either side of the protrusion-accommodating area.

[0010] By adopting the above technical solution, a protrusion is provided in the middle area of ​​the bottom plate of the battery, and accordingly, the middle area of ​​the housing is also a protrusion-corresponding area, so that the protrusion-corresponding area of ​​the housing corresponds to the protrusion of the bottom plate of the battery, and the other area on the bottom of the housing other than the protrusion-corresponding area is a non-protrusion-corresponding area, that is, the both side areas of the protrusion-corresponding area are: Non-protrusion compatible area and either one or two explosion-proof valves Non-protrusion compatible areaThe anti-explosion valve may be installed within the battery core, thereby offsetting the anti-explosion valve from the protrusion and avoiding the problem of uneven exhaust caused by the protrusion blocking the anti-explosion valve when thermal runaway occurs in the battery core, thereby achieving smooth exhaust and avoiding explosions caused by uneven exhaust when thermal runaway occurs in the battery core, thereby reducing potential safety risks.

[0011] In some embodiments, the housing has an explosion-proof valve located in at least one non-protrusion-accommodating area.

[0012] By adopting the above technical solution, an explosion-proof valve can be installed in at least one non-protrusion corresponding area, so that when thermal runaway occurs in the battery core, the explosion-proof valve located in at least one non-protrusion corresponding area can exhaust smoothly, thereby exhausting the air, avoiding the occurrence of danger, and further improving safety.

[0013] In some embodiments, the housing has explosion-proof valves located in both of the two non-protrusion corresponding areas.

[0014] By adopting the above technical solution, explosion-proof valves are installed in both of the two non-protrusion corresponding areas, that is, the number of explosion-proof valves is at least two, so that when thermal runaway occurs in the battery core, exhaust can be performed through at least two explosion-proof valves, improving the exhaust effect and speed and further improving safety. In addition, explosion-proof valves are installed in each of the two non-protrusion corresponding areas, so that when thermal runaway occurs in the battery core, exhaust can be performed at different positions of the battery case, and the gas can be discharged to the outside through the nearest explosion-proof valve, improving the exhaust speed and effect and further reducing the risk.

[0015] In some embodiments, the housing has a plurality of explosion-proof valves located within the non-protrusion-accommodating area.

[0016] By adopting the above technical proposal, Non-protrusion compatible area A plurality of explosion-proof valves can be installed inside the exhaust pipe, respectively, thereby improving the exhaust effect and efficiency and further improving safety.

[0017] In some embodiments, the explosion-proof valves located in the two non-protrusion corresponding areas are symmetrically located.

[0018] By adopting the above technical solution, the two symmetrically installed explosion-proof valves avoid the problem of uneven exhaust due to the offset of the explosion-proof valves, improve the exhaust effect and efficiency, and further avoid the possibility of explosion due to thermal runaway of the battery core, thereby improving safety. In addition, the two symmetrically installed explosion-proof valves make the appearance of the battery case more beautiful and clean.

[0019] In some embodiments, the explosion-proof valve is a notched explosion-proof valve or a welded explosion-proof valve.

[0020] By adopting the above technical solution, the notched explosion-proof valve refers to an explosion-proof valve formed on the housing by notching, making the notched positions of the housing weaker than other positions of the housing, so that when thermal runaway occurs in the battery core, the gas generated by the thermal runaway can break through the notched explosion-proof valve to be discharged when the pressure reaches a certain value, thereby avoiding safety issues caused by thermal runaway.The welded explosion-proof valve refers to an explosion-proof valve formed on the housing by welding, making the welded positions of the housing weaker than other positions of the housing, so that when thermal runaway occurs in the battery core, the gas generated by the thermal runaway can break through the welded explosion-proof valve to be discharged when the pressure reaches a certain value, thereby avoiding safety issues caused by thermal runaway.

[0021] According to a second aspect, the present application provides a battery cell, which includes the battery case and the battery core in the above embodiment, and the battery core is installed in the housing of the battery case.

[0022] The beneficial effect of the battery cell according to the embodiment of the present application is that the battery cell according to the embodiment of the present application uses the battery case in the above embodiment, which effectively improves the safety performance of the battery cell.

[0023] According to a third aspect, the present application provides a battery, including a bottom plate and the battery cells of the above-mentioned embodiments, wherein the plurality of battery cells are arranged in a sequential manner, the bottom plate is fixedly installed on the bottom of the plurality of battery cells, and the protrusions on the bottom plate are installed opposite to the protrusion-corresponding areas of the battery case of the battery cells.

[0024] The beneficial effect of the battery according to the embodiment of the present application is that since the battery according to the embodiment of the present application uses the battery cells in the above embodiment, the safety performance of the battery is effectively improved.

[0025] According to a fourth aspect, the present application provides a power consumption device including a battery for supplying electrical energy as in any of the above embodiments.

[0026] The beneficial effect of the power consuming device according to the embodiment of the present application is that, since the power consuming device according to the embodiment of the present application uses the battery in the above embodiment, the safety performance of the power consuming device is effectively improved.

[0027] The above description is merely a summary of the technical solution of the present application, which can be implemented according to the content of the specification in order to more clearly understand the technical means of the present application, and to make the above and other objectives, features and advantages of the present application more apparent, the following particularly cites specific embodiments of the present application for description.

[0028] In order to more clearly explain the technical solutions in the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments or exemplary technical description. It is obvious that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without exerting any creative efforts. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a schematic diagram of an inverted structure of a battery case with a welded anti-explosion valve according to some embodiments of the present application. FIG. [Figure 2]1 is a schematic diagram of an inverted structure of a battery case with a notched explosion-proof valve according to some embodiments of the present application. FIG. [Figure 3] 1 is a schematic diagram of an exploded structure of a battery according to some embodiments of the present application. [Figure 4] 2 is a schematic diagram of an exploded structure of a battery according to some embodiments of the present application. [Figure 5] FIG. 1 is a top view of a battery according to some embodiments of the present application. [Figure 6] FIG. 6 is a cross-sectional view of the battery shown in FIG. 5 taken along the line AA. DETAILED DESCRIPTION OF THE INVENTION

[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be described in more detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only for the purpose of interpreting the present application, and do not limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "mounted on" another element, the element may be directly or indirectly located on the element. When an element is referred to as being "connected to" another element, the element may be directly or indirectly connected to the element. The orientations or positional relationships indicated by the terms "up," "down," "left," "right," etc. are based on the orientations or positional relationships shown in the drawings and are merely for convenience of description. They do not indicate or imply that the referenced devices or elements must have a particular orientation, be configured, and operate in a particular orientation. Therefore, they should not be understood as limitations on the present application; those skilled in the art can understand the specific meanings of the terms according to the specific circumstances. The terms "first," "second," "third," "fourth," and "fifth" are merely for ease of description and cannot be understood as indicating or implying relative importance or the number of technical features. Unless otherwise clearly and specifically limited, "plurality" means two or more.

[0032] At present, in view of the development of the market situation, the application of power batteries is becoming more and more widespread. Power batteries are not only used in energy storage power systems such as hydroelectric power, thermal power, wind power and solar power plants, but also widely used in electric transportation devices such as electric bicycles, electric motorcycles and electric cars, as well as military equipment and aerospace, etc. With the continuous expansion of the application fields of power batteries, the market demand for them is also continuously increasing.

[0033] The inventor realized that with the widespread application of batteries, people are increasingly attaching importance to the safety performance of batteries, and that when thermal runaway occurs in the battery core and the internal pressure of the battery core exceeds a predetermined value, the battery core explosion cannot be avoided unless the gas inside the battery core is released, so that an explosion-proof valve needs to be installed on the battery case, so that when the internal pressure of the battery core reaches a predetermined value, the gas will break through the explosion-proof valve and open the explosion-proof valve to release the gas, thereby preventing the battery core from exploding. However, because the battery bottom plate has a protrusion in the middle region, the position of the protrusion corresponds to the position of the explosion-proof valve, i.e., the protrusion blocks the explosion-proof valve and prevents the explosion-proof valve from releasing the gas. As a result, when thermal runaway occurs in the battery core, the gas cannot be released smoothly, which can lead to an explosion, posing a potential safety risk.

[0034] Based on the above idea, in order to solve the problem of explosion caused by the insufficient exhaust when the thermal runaway occurs in the battery core, the inventor has conducted extensive research and designed a battery case, and the bottom of the housing of this battery case has a protrusion corresponding area and Non-protrusion compatible area The protrusion-corresponding area corresponds to the protrusion on the bottom plate of the battery, and the non-protrusion-corresponding area is installed offset from the protrusion on the bottom plate of the battery. The explosion-proof valve is installed in the non-protrusion-corresponding area, so that the explosion-proof valve is not blocked by the protrusion on the bottom plate of the battery, which avoids the problem of unsmooth exhaust due to the explosion-proof valve being blocked, and prevents the battery core from exploding.

[0035] Based on the above ideas, in order to solve the problem of explosion caused by uneven exhaust when thermal runaway occurs in the battery core, the inventor has conducted extensive research and designed a battery case, in which the bottom of the housing of this battery case is divided into a protrusion-matching area and a non-protrusion-matching area, the protrusion-matching area corresponds to the protrusion on the bottom plate of the battery, and the non-protrusion-matching area is installed offset from the protrusion on the bottom plate of the battery, and the explosion-proof valve is installed in the non-protrusion-matching area, so that the explosion-proof valve is not blocked by the protrusion on the bottom plate of the battery, avoiding the problem of uneven exhaust caused by the explosion-proof valve being blocked and preventing the battery core from exploding.

[0036] In such a battery case, when thermal runaway occurs in the battery core and the internal pressure of the battery core reaches a predetermined value, the gas breaks through the explosion-proof valve and opens it. Because the explosion-proof valve is installed in the non-protrusion-compatible area of ​​the housing, it is not blocked by the protrusions on the bottom plate of the battery, and the gas can be smoothly discharged to the outside after the explosion-proof valve opens, thereby avoiding the explosion of the battery core and improving safety.

[0037] The battery cells disclosed in the embodiments of the present application can be used in power-consuming devices such as, but not limited to, vehicles, ships, and aircraft. A power supply system comprising the battery case, battery cell, and battery disclosed in the present application can be used to configure the power-consuming device. In this way, when thermal runaway occurs in the battery core, gas can be advantageously exhausted by breaking through the explosion-proof valve, thereby avoiding explosion and improving safety.

[0038] An embodiment of the present application provides a power-consuming device that uses a battery as a power source, and the power-consuming device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a steamship, a spacecraft, etc. Here, the electric toy may include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric steamship toy, and an electric plane toy, and the spacecraft may include an airplane, a rocket, a spacecraft, a spaceship, etc.

[0039] 1 and 2, Fig. 1 is a structural schematic diagram of a battery case 1 according to some embodiments of the present application. Fig. 2 is a structural schematic diagram of a battery case 1 according to other some embodiments of the present application. The battery case 1 includes a housing 11 and an explosion-proof valve 12. The housing 11 has an accommodating space for accommodating a battery core 2. The bottom of the housing 11 is divided into a protrusion-accommodating area 111 and a non-protrusion-accommodating area 112. The explosion-proof valve 12 is Non-protrusion compatible area It will be installed in.

[0040] 1 and 2, Fig. 1 is a structural schematic diagram of a battery case 1 according to some embodiments of the present application. Fig. 2 is a structural schematic diagram of a battery case 1 according to other some embodiments of the present application. The battery case 1 includes a housing 11 and an explosion-proof valve 12. The housing 11 has an accommodating space for accommodating a battery core 2. The bottom of the housing 11 is divided into a protrusion-accommodating area 111 and a non-protrusion-accommodating area 112. The explosion-proof valve 12 is installed in the non-accommodating area.

[0041] 3 to 6, Figures 3 and 4 are structural schematic diagrams of a battery 100 according to some embodiments of the present application. The battery 100 includes a plurality of battery cells 3, where the battery cell 3 refers to the smallest unit constituting the battery 100. The battery cell 3 includes an end cover, a battery case 1, a battery core 2, and other functional components.

[0042] The end cover refers to a member that covers the opening of the battery case 1 and isolates the internal environment of the battery cell 3 from the external environment. The shape of the end cover is not limited, and may be adapted to fit the shape of the battery case 1. Alternatively, the end cover may be made of a material (e.g., aluminum alloy) with a certain hardness and strength. In this way, the end cover is less likely to deform when pushed out and hit, and the battery cell 3 may have higher structural strength and improved safety performance.

[0043] The battery case 1 is an assembly that fits with an end cap to form an internal environment for the battery cell 3. The formed internal environment may be used to accommodate the battery core 2, electrolyte, and other components. The battery case 1 and the end cap may be separate components, or an opening may be provided on the battery case 1, and the end cap may be placed over the opening to form the internal environment for the battery cell 3. Alternatively, the end cap and the battery case 1 may be integrated. The battery case 1 may have various shapes and sizes, such as a rectangular parallelepiped, cylindrical, or hexagonal prism. Specifically, the shape of the battery case 1 may be determined depending on the specific shape and size of the battery core 2. The battery case 1 may be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic, and the embodiments of the present application do not impose any particular limitations thereon. The battery case 1 includes a housing 11 and an explosion-proof valve 12. The housing 11 accommodates the battery core 2. The bottom of the housing 11 is located below the battery core 2. The bottom of the housing 11 has a protrusion-matching area 111 and a non-protrusion-matching area 112. The protrusion-matching area 111 corresponds to the protrusion 41 on the bottom plate 4 of the battery 100, and the non-protrusion-matching area 112 does not correspond to the protrusion 41 on the bottom plate 4 of the battery 100. The explosion-proof valve 12 is located in the non-protrusion-matching area 112 at the bottom of the housing 11. When thermal runaway occurs in the battery core 2 and the internal pressure of the battery core 2 reaches a certain value, the explosion-proof valve 12 is broken open. Since the explosion-proof valve 12 is not blocked by the protrusion 41 on the bottom plate 4 of the battery 100, the gas can be smoothly discharged, preventing the battery core 2 from exploding.

[0044] The battery core 2 is a component where electrochemical reactions occur in the battery cells 3. The battery core 2, also known as an electrode assembly, is typically formed by winding or stacking positive and negative electrode plates, with a separator typically disposed between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material form the main body of the battery core 2, while the portions of the positive and negative electrode plates without active material form tabs, respectively. The positive and negative electrode tabs may both be located at one end of the main body, or may be located at both ends of the main body. During charging and discharging of the battery 100, the positive and negative electrode active materials react with the electrolyte, and the tabs are connected to electrode terminals to form a current circuit.

[0045] Referring to Figures 3 to 5, the battery 100 includes a bottom plate 4 and a plurality of battery cells 3 arranged in sequence, the bottom plate 4 is installed at the bottom of the plurality of battery cells 3 arranged in sequence, and protrusions 41 are provided on the bottom plate 4, and the area corresponding to the protrusions 41 on the bottom of the housing 11 of the battery cells 3 is a protrusion-corresponding area 111, and the area not corresponding to the protrusions 41 on the bottom of the housing 11 of the battery cells 3 is a non-protrusion-corresponding area 112.

[0046] The battery 100 may include multiple battery cells 3, and the multiple battery cells 3 may be connected in series, parallel, or series-parallel. A series-parallel connection means that the multiple battery cells 3 may be connected in series or in parallel. The multiple battery cells 3 may also be connected in series, parallel, or series-parallel. Of course, the battery 100 may be configured such that multiple battery cells 3 are first connected in series, parallel, or series-parallel to form a battery module, and multiple battery modules are further connected in series, parallel, or series-parallel to form an integrated battery module. The battery 100 may further include other structures, for example, the battery 100 may further include busbar members for establishing electrical connection between the multiple battery cells 3.

[0047] Here, each battery cell 3 may be a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 3 may have a cylindrical, flat, rectangular, or other shape.

[0048] According to some embodiments of the present application, referring to Figures 1 to 3, the present application provides a battery case 1, which includes a housing 11 and an explosion-proof valve 12, the bottom of the housing 11 has a protrusion-corresponding area 111 and a non-protrusion-corresponding area 112, the protrusion-corresponding area 111 is located opposite the protrusion 41 of the bottom plate 4 of the battery 100, the non-protrusion-corresponding area 112 is located offset from the protrusion 41 of the bottom plate 4 of the battery 100, and the explosion-proof valve 12 is located in the non-protrusion-corresponding area 112.

[0049] The housing 11 is a container case that houses the battery core 2 and includes a bottom and sides. The bottom is located below the battery core 2 and the sides are structured to surround the side walls of the battery core 2. A bottom plate 4 of the battery 100 is also located below the battery case 1, and protrusions 41 are provided on the bottom plate 4 of the battery 100. A portion of the bottom area of ​​the housing 11 corresponds to the protrusions 41 on the bottom of the battery 100, and this area is the protrusion-matching area 111. The area that does not correspond to the protrusions 41 on the bottom of the housing 11 is the non-protrusion-matching area 112. The explosion-proof valve 12 is located in the non-protrusion-matching area 112 on the bottom of the housing 11. The explosion-proof valve 12 is a thin-walled valve body on the housing 11. The explosion-proof valve 12 is the first to be pierced when the housing 11 is subjected to a pressure shock, thereby achieving the purpose of discharging gas.

[0050] An explosion-proof valve 12 is installed in the non-protrusion corresponding area 112 on the bottom of the housing 11. When thermal runaway occurs in the battery core 2 and the internal pressure of the battery core 2 exceeds a predetermined value, the explosion-proof valve 12 is opened and gas is discharged from the explosion-proof valve 12. Because the explosion-proof valve 12 is installed in the non-protrusion corresponding area 112, the protrusion 41 on the bottom plate 4 of the battery 100 does not block the explosion-proof valve 12, which prevents the explosion-proof valve 12 from discharging smoothly. The gas in the battery cell 3 can be discharged smoothly, thereby preventing the battery core 2 from exploding, reducing potential safety risks and improving safety.

[0051] 1 to 3, according to some embodiments of the present application, the protrusion corresponding area 111 is located in the middle area of ​​the bottom of the housing 11, and both sides of the protrusion corresponding area 111 are non-protrusion corresponding areas 112.

[0052] The middle area of ​​the bottom of the housing 11 is a protrusion-corresponding area 111, and both sides of the protrusion-corresponding area 111 located in the middle area are non-protrusion-corresponding areas 112. The explosion-proof valve 12 is attached to one or both of the protrusion-corresponding areas 111. Non-protrusion compatible area The anti-explosion valve 12 can be installed within the battery core 2, thereby offsetting the anti-explosion valve 12 relative to the protrusion 41, and avoiding the problem of uneven exhaust caused by the protrusion 41 blocking the anti-explosion valve 12 when thermal runaway occurs in the battery core 2. This allows for smooth exhaust, avoiding explosions caused by uneven exhaust when thermal runaway occurs in the battery core 2, and reducing potential safety risks.

[0053] The middle region of the bottom of the housing 11 is a protrusion-compatible region 111, and both sides of the protrusion-compatible region 111 located in the middle region are non-protrusion-compatible regions 112. The explosion-proof valve 12 can be installed in either one or two of the non-compatible regions on either side of the protrusion-compatible region 111, thereby offsetting the explosion-proof valve 12 from the protrusion 41 and avoiding the problem of uneven exhaust caused by the protrusion 41 blocking the explosion-proof valve 12 when thermal runaway occurs in the battery core 2. This achieves smooth exhaust and avoids explosions caused by uneven exhaust when thermal runaway occurs in the battery core 2, reducing potential safety risks.

[0054] According to some embodiments of the present application, the housing 11 has an explosion-proof valve 12 installed in at least one non-protrusion corresponding area 112 .

[0055] The protrusion-corresponding area 111 is located in the middle area of ​​the bottom of the housing 11, so that both sides of the protrusion-corresponding area 111 are non-protrusion-corresponding areas 112. In order to avoid the explosion-proof valve 12 being blocked by the protrusion 41 on the bottom plate 4 of the battery 100, the explosion-proof valve 12 can be located in the non-protrusion-corresponding area 112, and the explosion-proof valve 12 can also be located in at least one non-protrusion-corresponding area 112.

[0056] By adopting the above technical solution, the explosion-proof valve 12 can be installed in at least one non-protrusion corresponding area 112, so that when thermal runaway occurs in the battery core 2, the explosion-proof valve 12 located in at least one non-protrusion corresponding area 112 will not be blocked by the protrusion 41, and can thereby smoothly discharge gas, preventing the phenomenon of uneven exhaust. This avoids explosions caused by uneven exhaust, reduces the risk, and further improves safety.

[0057] 1 to 3, according to some embodiments of the present application, the housing 11 has explosion-proof valves 12 installed in both of the two non-protrusion corresponding areas 112.

[0058] An explosion-proof valve 12 is installed in each of the two non-protrusion corresponding regions 112, that is, the number of explosion-proof valves 12 is at least two, and each explosion-proof valve 12 is installed at an interval.

[0059] An explosion-proof valve 12 is installed in each of the two non-protrusion corresponding areas 112, and at least one explosion-proof valve 12 is installed in each non-protrusion corresponding area 112, that is, the number of explosion-proof valves 12 is at least two, so that when thermal runaway occurs in the battery core 2, exhaust can be performed through at least two explosion-proof valves 12, improving the exhaust effect and speed and further improving safety. In addition, since an explosion-proof valve 12 is installed in each of the two non-protrusion corresponding areas 112, when thermal runaway occurs in the battery core 2, exhaust can be performed at different positions on the battery case 1, and the gas can be discharged to the outside through the nearest explosion-proof valve 12, improving the exhaust speed and effect and further reducing the risk.

[0060] According to some embodiments of the present application, the housing 11 has a plurality of explosion-proof valves 12 installed in the non-protrusion corresponding area 112 .

[0061] By adopting the above technical solution, multiple explosion-proof valves 12 can be installed in each non-protrusion corresponding area 112, thereby improving the exhaust effect and efficiency and further improving safety.

[0062] As shown in FIGS. 1 to 3, according to some embodiments of the present application, the explosion-proof valves 12 installed in the two non-protrusion corresponding areas 112 are installed symmetrically.

[0063] The explosion-proof valves 12 installed in the two non-protrusion corresponding areas 112 are installed symmetrically, that is, the explosion-proof valves 12 installed in the two non-protrusion corresponding areas 112 are installed symmetrically with respect to the protrusion corresponding area 111.

[0064] Since the protrusion 41 on the bottom plate 4 of the battery 100 corresponds to the middle region of the bottom of the housing 11, the explosion-proof valves 12 are installed in the non-middle region of the bottom of the housing 11, and in this case the explosion-proof valves 12 are offset from the protrusion 41, and the explosion-proof valves 12 in the two non-protrusion corresponding regions 112 are installed symmetrically to ensure smooth exhaust. This avoids the problem of uneven exhaust due to the offset of the explosion-proof valves 12, improves the exhaust effect and efficiency, and further avoids the possibility of explosion due to thermal runaway of the battery core 2, improving safety. In addition, the two explosion-proof valves 12 installed symmetrically make the appearance of the battery case 1 more beautiful and clean.

[0065] As shown in FIGS. 1 and 2, according to some embodiments of the present application, the explosion-proof valve 12 is a notched explosion-proof valve or a welded explosion-proof valve.

[0066] The notched explosion-proof valve refers to an explosion-proof valve 12 formed by notching on the housing 11, where the notched portion of the housing 11 is weaker than other portions of the housing 11 and is therefore more easily pierced open by the impact of gas pressure; the welded explosion-proof valve refers to an explosion-proof valve 12 formed on the housing 11 by welding, where the welded portion of the housing 11 is weaker than other portions of the housing 11 and is therefore more easily pierced open by the impact of gas pressure.

[0067] The explosion-proof valve 12 may be installed as a notched explosion-proof valve or a welded explosion-proof valve. When thermal runaway occurs in the battery core 2, the gas generated by the thermal runaway can be discharged to the outside by breaking through the notched explosion-proof valve or the welded explosion-proof valve, thereby avoiding safety problems caused by thermal runaway.

[0068] According to a second aspect, an embodiment of the present application further provides a battery cell 3. Referring to FIGS. 3 to 6, the battery cell 3 includes the battery case 1 and the battery core 2 in the above embodiment, and the battery core 2 is installed in the housing 11 of the battery case 1.

[0069] The battery cell 3 according to the embodiment of the present application uses the battery case 1 according to the above embodiment, and therefore the safety performance of the battery cell 3 is effectively improved.

[0070] According to a third aspect, an embodiment of the present application further provides a battery 100, comprising a battery cell 3 and a bottom plate 4 of any of the above aspects, wherein a plurality of battery cells 3 are arranged in sequence, the bottom plate 4 is fixedly installed at the bottom of the plurality of battery cells 3, and the protrusions 41 on the bottom plate 4 are installed opposite the protrusion-corresponding areas 111 of the battery case 1 of the battery cells 3.

[0071] The battery 100 according to the embodiment of the present application uses the battery cell 3 in the above embodiment, and therefore the safety performance of the battery 100 is effectively improved.

[0072] According to a fourth aspect, an embodiment of the present application further provides a power consuming device, comprising the battery 100 of any of the above aspects, and the battery 100 is used to provide electrical energy to the power consuming device.

[0073] The power consuming device may be any one of the devices or systems described above that utilizes the battery 100 .

[0074] According to some embodiments of the present application, referring to FIGS. 1 to 6, the present application provides a battery case 1, the battery case 1 including a housing 11 and an explosion-proof valve 12, a battery core 2 is installed inside the housing 11, a protrusion-matching area 111 is installed in the middle area of ​​the bottom of the housing 11, facing the protrusion 41 of the bottom plate 4 of the battery 100, and two non-protrusion-matching areas 112 are installed on both sides of the protrusion-matching area 111 on the bottom of the housing 11, and the explosion-proof valves 12 are installed in the two non-protrusion-matching areas 112 of the housing 11, and the explosion-proof valves 12 located in the two non-protrusion-matching areas 112 are installed symmetrically. As a result, the protrusions 41 on the bottom plate 4 of the battery 100 do not block the explosion-proof valve 12, and the protrusions 41 on the bottom plate 4 of the battery 100 do not adversely affect the normal exhaust of the explosion-proof valve 12. When thermal runaway occurs in the battery core 2 and the internal pressure of the battery core 2 exceeds a predetermined value, the explosion-proof valve 12 is installed symmetrically, so that the protrusions 41 on the bottom plate 4 of the battery 100 do not affect the exhaust of the explosion-proof valve 12. This avoids the problem of the explosion-proof valve 12 not being able to exhaust smoothly, and allows the gas inside the battery 100 to be exhausted smoothly, thereby avoiding the rupture of the battery core 2, reducing potential safety risks, and improving safety.

[0075] The above are only selective examples of the present application and are not intended to limit the present application. Those skilled in the art will appreciate that the present application can undergo various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application. [Explanation of symbols]

[0076] 1 battery case, 11 housing, 111 protrusion compatible area, 112 non-protrusion compatible area, 12 explosion-proof valve, 2 battery cores, 3 battery cells, 4 bottom plate, 41 protrusions, 100 batteries.

Claims

1. A battery case for use with a battery cell, A housing, the bottom of the housing having a protrusion-corresponding area and a non-protrusion-corresponding area, the protrusion-corresponding area being positioned opposite the protrusion of the bottom plate of the battery, and the non-protrusion-corresponding area being positioned offset from the protrusion of the bottom plate of the battery; an explosion-proof valve installed in the non-protrusion corresponding area, The protrusion-corresponding area is located in a middle area of ​​the bottom of the housing, and both sides of the protrusion-corresponding area are the non-protrusion-corresponding areas; The battery case has explosion-proof valves installed in both of the two non-protrusion corresponding areas of the housing.

2. A battery case for use with a battery cell, comprising: A housing, the bottom of the housing having a protrusion-corresponding area and a non-protrusion-corresponding area, the protrusion-corresponding area being positioned opposite the protrusion of the bottom plate of the battery, and the non-protrusion-corresponding area being positioned offset from the protrusion of the bottom plate of the battery; an explosion-proof valve installed in the non-protrusion corresponding area, The protrusion-corresponding area is located in a middle area of ​​the bottom of the housing, and both sides of the protrusion-corresponding area are the non-protrusion-corresponding areas; The battery case has a plurality of explosion-proof valves installed in the non-protrusion corresponding areas of the housing.

3. The battery case according to claim 2 , wherein the explosion-proof valves installed in the two non-protrusion corresponding areas are symmetrical.

4. The battery case according to claim 1 , wherein the explosion-proof valve is a notched explosion-proof valve or a welded explosion-proof valve.

5. A battery cell, comprising: a battery case according to any one of claims 1 to 4; and A battery cell including a battery core disposed within the housing of the battery case.

6. A battery, a plurality of battery cells according to claim 5 arranged in sequence; a bottom plate that is fixedly installed on the bottom of the plurality of battery cells, and the protrusions on the bottom plate are installed opposite the protrusion-corresponding areas of the battery cases of the battery cells.

7. A power consuming device, the power consuming device comprising the battery of claim 6.

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