Explosion-proof box body for battery and battery

Abstract

The explosion-proof box for the battery comprises a shell and a cover body, the top end of the shell is open, the cover body is provided with a first side and a second side which are opposite, the first side is hinged to one side of the top end of the shell, the second side is connected with an elastic band, the bottom end of the elastic band is detachably connected with the other side of the top end of the shell, and the cover body is provided with a side plate. The side plate is attached to the outer side face of the shell. The side plate on the second side is provided with a ventilation groove, and the side wall of the shell covers the inner side of the ventilation groove. Or, a ventilation groove is formed in the side wall of the shell, and the side plate on the second side covers the outer side of the ventilation groove; when the bottom face of the cover body is impacted by airflow in the shell, the second side can move upwards so that the inner cavity of the shell can be communicated with the external environment through the ventilation groove. According to the explosion-proof box body for the battery and the battery, the explosion-proof effect can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an explosion-proof enclosure for batteries and a battery. Background Technology

[0002] Batteries produce gas during long-term use (such as overcharging). Excessive gas can cause high internal pressure. In related technologies, vents are provided on the battery cover for ventilation. However, to reduce the impact of external dust and rainwater on internal components by entering the battery through the vents, the vent diameter is generally set to be small. Thus, when a short circuit occurs in the internal components of the battery, generating a large amount of heat or even igniting, the electrolyte decomposes instantly, producing a large amount of gas. The small-diameter vents cannot keep up with the gas flow, resulting in poor explosion-proof performance. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an explosion-proof enclosure for batteries, which can effectively improve the explosion-proof effect.

[0004] This utility model also proposes a battery having the above-mentioned explosion-proof enclosure for batteries.

[0005] According to a first aspect of the present invention, an explosion-proof battery enclosure includes a shell and a cover. The top of the shell is open. The cover has a first side and a second side. The first side is hinged to one side of the top of the shell. The second side is connected to an elastic band, the bottom end of which is detachably connected to the other side of the top of the shell. The cover has a side plate that fits against the outer surface of the shell. The side plate on the second side has a vent groove, and the side wall of the shell covers the inner side of the vent groove. Alternatively, the side wall of the shell has a vent groove, and the side plate on the second side covers the outer side of the vent groove. When the bottom surface of the cover is impacted by airflow inside the shell, the second side can move upward to allow the inner cavity of the shell to communicate with the external environment through the vent groove.

[0006] The explosion-proof battery enclosure according to the embodiments of this utility model has at least the following beneficial effects:

[0007] When a short circuit occurs in the internal components of the battery, generating a large amount of heat or even igniting, the electrolyte decomposes instantly, producing a large amount of gas. This high-pressure gas flow then impacts the bottom surface of the cover. The elastic band, subjected to this impact, stretches, allowing the second side of the cover to move upwards. When the vent is located on the second side panel, it moves to the top of the casing, allowing the internal cavity of the casing to connect with the external environment. When the vent is located on the side wall of the casing, the second side of the cover moves upwards to expose the vent, again allowing the internal cavity of the casing to connect with the external environment and enabling the high-pressure gas flow inside the casing to be quickly discharged. Normally, the side panel of the cover is attached to the outer surface of the casing, and the vent can be covered by the side wall of the casing or the second side panel. This prevents external dust and rainwater from entering the battery through the vent and affecting the internal components. Therefore, the area of ​​the vent can be set larger, effectively improving the explosion-proof effect.

[0008] According to some embodiments of the present invention, the ventilation groove is provided on the side plate on the second side and extends along the length direction of the side plate on the second side, and two elastic bands are provided and are respectively located on both sides of the ventilation groove.

[0009] According to some embodiments of this utility model, the explosion-proof enclosure for batteries further includes:

[0010] An explosion-proof component includes a mounting base and an explosion-proof plate. The mounting base is installed on the cover and has a through-hole. The through-hole includes a first section and a second section. The second section is located below the first section and has a smaller diameter than the first section. The wall of the first section has a connecting groove that extends vertically. The explosion-proof plate is slidably installed in the first section and covers the top of the second section.

[0011] When the airflow inside the housing enters the second hole section, the explosion-proof plate can be lifted by the airflow to a position higher than the bottom of the connecting groove, so that the top of the first hole section can communicate with the second hole section through the connecting groove.

[0012] According to some embodiments of the present invention, the explosion-proof component further includes:

[0013] An elastic element is connected to the hole wall of the first hole segment and elastically abuts against the upper end face of the explosion-proof plate.

[0014] According to some embodiments of the present invention, the elastic element includes:

[0015] A connecting part is connected to the wall of the first hole section;

[0016] An elastic sheet is connected to the connecting portion, and the elastic sheet extends from top to bottom along the axis close to the first hole segment.

[0017] According to some embodiments of the present invention, the elastic element is provided in multiple ways and arranged circumferentially along the first hole segment, and the connecting groove is provided in multiple ways and arranged circumferentially along the first hole segment.

[0018] According to some embodiments of the present invention, the elastic element and the communicating groove are arranged in a staggered manner along the circumference of the first hole segment.

[0019] According to some embodiments of this utility model, the cover body is provided with a through mounting hole, and the mounting base includes:

[0020] The mounting part includes a mounting ring and a convex ring. The mounting ring is mounted to the upper end of the cover body by fasteners. The mounting ring has a threaded hole. The convex ring is located at the bottom end of the mounting ring and is inserted into the mounting hole. A second hole section is located on the convex ring. The diameter of the threaded hole is larger than the diameter of the second hole section.

[0021] A stud is threaded into the threaded hole, and the first hole section is provided in the stud.

[0022] According to some embodiments of the present invention, the top end of the stud protrudes beyond the top end of the mounting ring.

[0023] According to some embodiments of the present invention, the outer end of the bottom surface of the convex ring is flush with the bottom surface of the cover, and the bottom surface of the convex ring extends upward from the outside to the inside.

[0024] According to some embodiments of the present invention, a sealing ring is sandwiched between the bottom surface of the mounting ring and the top surface of the cover.

[0025] The battery according to a second aspect of the present invention includes the explosion-proof housing for batteries described in the first aspect of the present invention.

[0026] The battery according to the embodiments of the present invention has at least the following beneficial effects:

[0027] The explosion-proof battery enclosure according to the first aspect of this utility model has the following advantages: under normal circumstances, the side plate of the cover is attached to the outer side of the shell, and the ventilation groove can be covered by the side wall of the shell or the side plate of the second side. In this way, external dust and rainwater can be prevented from entering the battery through the ventilation groove and affecting the components inside the battery. As a result, the area of ​​the ventilation groove can be set to be larger, thereby effectively improving the explosion-proof effect.

[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof enclosure for batteries according to this utility model;

[0031] Figure 2 This is a schematic diagram of the installation of the explosion-proof components;

[0032] Figure 3 for Figure 2 This is a diagram showing the explosion-proof plate in another position.

[0033] Icon labels:

[0034] Casing 100;

[0035] Cover 200; First side 201; Second side 202; Elastic band 203; Side plate 204; Ventilation groove 205; Mounting hole 206;

[0036] Explosion-proof component 300; mounting base 301; explosion-proof plate 302; vent hole 303; first hole section 304; second hole section 305; connecting groove 306; elastic element 307; connecting part 308; elastic sheet 309; mounting part 310; mounting ring 311; convex ring 312; fastener 313; threaded hole 314; stud 315; sealing ring 316. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying 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 accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] The following is for reference. Figures 1 to 3 This invention describes an explosion-proof battery enclosure and a battery according to embodiments of the present invention.

[0042] like Figures 1 to 3 As shown, the explosion-proof battery enclosure according to the first aspect of the present invention includes a shell 100 and a cover 200.

[0043] The top of the housing 100 is open, and the housing 100 is used to install battery cells, etc. The cover 200 has a first side 201 and a second side 202. The first side 201 is hinged to one side of the top of the housing 100, and the second side 202 is connected to an elastic band 203. The elastic band 203 can be made of elastic rubber or elastic plastic. The bottom end of the elastic band 203 is detachably connected to the other side of the top of the housing 100. For example, the top end of the elastic band 203 can be connected to the second side 202 by fasteners or snaps, and the bottom end of the elastic band 203 can be detachably connected to the other side of the top of the housing 100. The cover 200 is provided with a side plate 204, which is attached to the outer side of the housing 100 by fasteners or snap-fit. The side plate 204 of the second side 202 is provided with a vent groove 205, and the side wall of the housing 100 covers the inner side of the vent groove 205. Alternatively, the side wall of the housing 100 is provided with a vent groove 205, and the side plate 204 of the second side 202 covers the outer side of the vent groove 205. When the bottom surface of the cover 200 is impacted by the airflow inside the housing 100, the second side 202 can move upward so that the inner cavity of the housing 100 and the external environment are connected through the vent groove 205.

[0044] In this invention, when a short circuit occurs in the internal components of the battery, generating a large amount of heat or even igniting, the electrolyte decomposes instantly, producing a large amount of gas. The high-pressure gas flow then impacts the bottom surface of the cover 200, causing the elastic band 203 to stretch elastically under the impact force, allowing the second side 202 of the cover 200 to move upwards. When the vent groove 205 is located on the side plate 204 of the second side 202, the vent groove 205 can move to a position above the housing 100, thereby allowing the inner cavity of the housing 100 to connect with the external environment through the vent groove 205. When the vent groove 205 is located on the side wall of the housing 100, the second side 202 of the cover 200 can move upwards to expose the vent groove 205, thereby allowing the inner cavity of the housing 100 to connect with the external environment through the vent groove 205, and enabling the high-pressure gas flow inside the housing 100 to be quickly discharged through the vent groove 205. Under normal circumstances, the side plate 204 of the cover 200 is attached to the outer side of the housing 100, and the venting groove 205 can be covered by the side wall of the housing 100 or the side plate 204 of the second side 202. In this way, external dust and rainwater can be prevented from entering the battery through the venting groove 205 and affecting the components inside the battery. As a result, the area of ​​the venting groove 205 can be set to be larger, thereby effectively improving the explosion-proof effect.

[0045] In some embodiments of this utility model, such as Figure 1 As shown, the ventilation groove 205 is provided on the side plate 204 of the second side 202 and extends along the length of the side plate 204 of the second side 202. Two elastic bands 203 are provided and are respectively located on both sides of the ventilation groove 205. In this embodiment, this arrangement not only makes the ventilation groove 205 larger in area and better in terms of ventilation effect, but also makes the connection between the cover 200 and the shell 100 more stable.

[0046] In some embodiments of this utility model, such as Figures 1 to 3As shown, the explosion-proof enclosure for the battery also includes an explosion-proof component 300, which includes a mounting base 301 and an explosion-proof plate 302. The mounting base 301 is mounted on the cover 200, for example, it can be connected to the cover 200 by a fastener 313, or it can be snapped onto the cover 200. The mounting base 301 is provided with a through-hole 303, which includes a first hole section 304 and a second hole section 305. The first hole section 304 and the second hole section 305 can be coaxially arranged. The second hole section 305 is located below the first hole section 304, and the diameter of the second hole section 305 is smaller than the diameter of the first hole section 304. When the cover 200 is installed on the top of the housing 100, the top of the first hole section 304 is connected to the outside, and the bottom of the second hole section 305 is connected to the inner cavity of the housing 100. The hole wall of the first hole section 304 is provided with a connecting groove 306, which extends vertically. The explosion-proof plate 302 is slidably installed in the first hole section 304 and covers the top of the second hole section 305. When the explosion-proof plate 302 covers the top of the second hole section 305, the bottom of the connecting groove 306 can be higher than the top of the explosion-proof plate 302 or located outside the explosion-proof plate 302.

[0047] When the airflow enters the second hole section 305 from the inner cavity of the housing 100, the explosion-proof plate 302 is impacted by the high-pressure airflow and slides upward. The explosion-proof plate 302 can be lifted by the airflow to a position higher than the bottom of the connecting groove 306, so that the top of the first hole section 304 can be connected to the second hole section 305 through the connecting groove 306.

[0048] In this invention, under normal circumstances, the explosion-proof plate 302 covers the top of the second hole section 305, thereby preventing external dust and rainwater from entering the battery through the vent 303 and affecting the internal components. When the air pressure inside the battery is high, the high-pressure airflow enters the second hole section 305 from the bottom. The explosion-proof plate 302 slides upward under the impact of the high-pressure airflow. When the explosion-proof plate 302 is lifted by the airflow to a position higher than the bottom of the connecting groove 306, the top of the first hole section 304 connects to the second hole section 305 through the connecting groove 306, facilitating the rapid discharge of high-pressure airflow and preventing the battery from exploding. The explosion-proof battery enclosure according to this embodiment not only has a better explosion-proof effect but also reduces the impact of external dust and rainwater on the internal components.

[0049] It is understood that the explosion-proof component 300 of this application can be used to discharge the gas generated during normal charging and discharging, so as to avoid the frequent lifting and lowering of the second side 202 of the cover 200, which would affect the use of the battery. When a short circuit occurs and a large amount of gas is generated, it can be discharged through the vent groove 205.

[0050] In some embodiments of this utility model, such as Figure 2 and Figure 3As shown, the explosion-proof component 300 also includes an elastic element 307, which is connected to the hole wall of the first hole segment 304. For example, the elastic element 307 can be integrally formed with the hole wall of the first hole segment 304, welded, or connected by screws. The elastic element 307 elastically abuts against the upper end face of the explosion-proof plate 302. In this utility model, under normal circumstances, the elastic element 307 elastically abuts against the upper end face of the explosion-proof plate 302, so that the explosion-proof plate 302 can tightly cover the top of the second hole segment 305, resulting in a better sealing effect. Moreover, when the battery is installed in the vehicle, it can prevent the explosion-proof plate 302 from shaking up and down randomly and generating noise during vehicle operation. When the high-pressure airflow inside the battery enters the second hole segment 305 from the bottom end and impacts the explosion-proof plate 302, the elastic element 307 elastically deforms, allowing the explosion-proof plate 302 to slide upward and release the cover of the second hole segment 305.

[0051] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the elastic element 307 includes a connecting portion 308 and an elastic sheet 309. The connecting portion 308 is connected to the hole wall of the first hole segment 304. For example, the connecting portion 308 can be integrally formed with the hole wall of the first hole segment 304, welded, or connected by screws. The elastic sheet 309 is connected to the connecting portion 308. For example, the elastic sheet 309 can be integrally formed with the connecting portion 308 or welded. The elastic sheet 309 extends from top to bottom along the axis close to the first hole segment 304. This configuration not only improves the elastic contact effect of the explosion-proof plate 302, thus improving the sealing performance of the explosion-proof plate 302, but also makes it easier for the elastic sheet 309 to deform elastically when the high-pressure airflow inside the battery enters the second hole segment 305 from the bottom end and impacts the explosion-proof plate 302, thus facilitating air permeability and improving the explosion-proof effect.

[0052] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, multiple elastic elements 307 are arranged circumferentially along the first hole segment 304, and multiple connecting grooves 306 are arranged circumferentially along the first hole segment 304. The multiple elastic elements 307 not only provide better elastic contact with the explosion-proof plate 302, but also prevent the explosion-proof plate 302 from flipping during sliding. The multiple connecting grooves 306 allow for faster airflow, resulting in better air permeability and explosion-proof performance.

[0053] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the elastic element 307 and the connecting groove 306 are arranged in a staggered manner along the circumference of the first hole section 304. This arrangement can prevent the elastic element 307 from affecting the air permeability of the connecting groove 306.

[0054] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the cover 200 has a through mounting hole 206. The mounting base 301 includes a mounting part 310 and a stud 315. The mounting part 310 includes a mounting ring 311 and a convex ring 312. The mounting ring 311 is mounted on the upper end of the cover 200 by a fastener 313. The mounting ring 311 has a threaded hole 314. The convex ring 312 is located at the bottom end of the mounting ring 311 and is inserted into the mounting hole 206. A second hole section 305 is located on the convex ring 312. The diameter of the threaded hole 314 is larger than the diameter of the second hole section 305. The stud 315 is threadedly connected to the threaded hole 314. A first hole section 304 is located on the stud 315.

[0055] In this embodiment, during assembly, the protruding ring 312 is inserted into the mounting hole 206 of the cover 200, the mounting ring 311 is connected to the cover 200 by fasteners 313, the explosion-proof plate 302 is placed in the first hole section 304 of the stud 315, and the stud 315 is threaded into the threaded hole 314 of the mounting ring 311. The assembly is simple and convenient, which makes it easier to clean, maintain and replace.

[0056] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the top of the stud 315 protrudes beyond the top of the mounting ring 311. This design facilitates the rotation of the stud 315, thereby facilitating its installation and removal.

[0057] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the outer end of the bottom surface of the convex ring 312 is flush with the bottom surface of the cover 200, and the bottom surface of the convex ring 312 extends upward from the outside to the inside. With this configuration, the bottom surface of the convex ring 312 can guide the high-pressure gas inside the battery, making it easier for the high-pressure gas inside the battery to quickly enter the second hole section 305 of the convex ring 312.

[0058] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, a sealing ring 316 is held between the bottom surface of the mounting ring 311 and the top surface of the cover 200. The sealing ring 316 reduces the amount of external water and dust that can enter the battery through the gap between the bottom surface of the mounting ring 311 and the top surface of the cover 200.

[0059] The battery according to the second aspect of the present invention includes the explosion-proof housing for the battery described in the first aspect of the present invention.

[0060] According to the battery of the present invention, by adopting the explosion-proof housing for the battery of the first aspect of the present invention, under normal circumstances, the side plate 204 of the cover 200 is attached to the outer side of the housing 100, and the ventilation groove 205 can be covered by the side wall of the housing 100 or the side plate 204 of the second side 202. In this way, external dust and rainwater can be prevented from entering the battery through the ventilation groove 205 and affecting the components inside the battery. As a result, the area of ​​the ventilation groove 205 can be set to be larger, thereby effectively improving the explosion-proof effect.

[0061] It should be noted that since the battery can adopt all the technical solutions of the explosion-proof enclosure for the battery in the first aspect embodiment described above, it has at least all the beneficial effects brought about by the technical solutions in the first aspect embodiment described above. These additional beneficial effects will not be elaborated here.

[0062] It is understood that other components and operations of the battery according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0063] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A battery explosion-proof enclosure, characterized in that, include: The casing has an open top. The cover has a first side and a second side, the first side is hinged to one side of the top of the housing, the second side is connected to an elastic band, the bottom end of the elastic band is detachably connected to the other side of the top of the housing, and the cover is provided with a side plate that fits against the outer surface of the housing. Wherein, the side plate on the second side is provided with a venting groove, and the side wall of the shell covers the inner side of the venting groove; or, the side wall of the shell is provided with a venting groove, and the side plate on the second side covers the outer side of the venting groove. When the bottom surface of the cover is impacted by the airflow inside the shell, the second side can move upward, allowing the inner cavity of the shell and the external environment to communicate through the venting groove.

2. The explosion-proof enclosure for batteries according to claim 1, characterized in that, The ventilation groove is provided on the side plate on the second side and extends along the length direction of the side plate on the second side. Two elastic bands are provided and are respectively located on both sides of the ventilation groove.

3. The explosion-proof enclosure for batteries according to claim 1, characterized in that, The explosion-proof enclosure for the battery also includes: An explosion-proof component includes a mounting base and an explosion-proof plate. The mounting base is installed on the cover and has a through-hole. The through-hole includes a first section and a second section. The second section is located below the first section and has a smaller diameter than the first section. The wall of the first section has a connecting groove that extends vertically. The explosion-proof plate is slidably installed in the first section and covers the top of the second section. When the airflow inside the housing enters the second hole section, the explosion-proof plate can be lifted by the airflow to a position higher than the bottom of the connecting groove, so that the top of the first hole section can communicate with the second hole section through the connecting groove.

4. The explosion-proof enclosure for batteries according to claim 3, characterized in that, The explosion-proof component also includes: An elastic element is connected to the hole wall of the first hole segment and elastically abuts against the upper end face of the explosion-proof plate.

5. The explosion-proof enclosure for batteries according to claim 4, characterized in that, The elastic element includes: A connecting part is connected to the wall of the first hole section; An elastic sheet is connected to the connecting portion, and the elastic sheet extends from top to bottom along the axis close to the first hole segment.

6. The explosion-proof enclosure for batteries according to claim 3, characterized in that, The cover has a through mounting hole running vertically, and the mounting base includes: The mounting part includes a mounting ring and a convex ring. The mounting ring is mounted to the upper end of the cover body by fasteners. The mounting ring has a threaded hole. The convex ring is located at the bottom end of the mounting ring and is inserted into the mounting hole. A second hole section is located on the convex ring. The diameter of the threaded hole is larger than the diameter of the second hole section. A stud is threaded into the threaded hole, and the first hole section is provided in the stud.

7. The explosion-proof enclosure for batteries according to claim 6, characterized in that, The top of the stud protrudes beyond the top of the mounting ring.

8. The explosion-proof enclosure for batteries according to claim 6, characterized in that, The outer end of the bottom surface of the convex ring is flush with the bottom surface of the cover, and the bottom surface of the convex ring extends upward from the outside to the inside.

9. The explosion-proof enclosure for batteries according to claim 6, characterized in that, A sealing ring is held between the bottom surface of the mounting ring and the top surface of the cover.

10. A battery, characterized in that, Includes the explosion-proof enclosure for batteries as described in any one of claims 1 to 9.

Images