Fire extinguishing mechanism for battery charging protection and battery charging container assembly with fire extinguishing mechanism

Abstract

The utility model relates to the field of lithium batteries, in particular to a fire extinguishing mechanism for battery charging protection and a battery charging container assembly with the fire extinguishing mechanism. The isolation assembly can be damaged under the action of expansion extrusion force of the rechargeable battery; the fire extinguishing mechanism disclosed by the utility model can perform protection in the charging expansion stage of the battery; through charging expansion of the battery, the battery extrudes an isolation assembly in the fire extinguishing mechanism, so that the isolation assembly is damaged, and then a protective medium isolated by the isolation assembly in the fire extinguishing mechanism flows to the rechargeable battery; and when the rechargeable battery is on fire, the protective medium can be used for carrying out fire extinguishing operation on the rechargeable battery.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to a fire extinguishing mechanism for battery charging protection and a battery charging container assembly having the fire extinguishing mechanism. Background Art

[0002] Lithium-ion batteries have become an indispensable energy storage device in our lives.

[0003] The specifications and energy storage capacity of lithium-ion batteries vary greatly: common electrical appliances such as mobile phones and laptops use small batteries (generally storing less than 100Wh), electric vehicles use large battery packs (storing tens to hundreds of kWh), and medium-sized batteries (100Wh to 15,000Wh) are widely used in electric bicycle batteries, electric wheelchair batteries, drone batteries, and portable outdoor mobile power supplies.

[0004] The current application of medium-sized lithium-ion batteries, especially in electric bicycles, is huge. my country has nearly 400 million electric bicycles, and in recent years, the annual sales of new vehicles are 50-60 million.

[0005] However, the safety issues of combustion and explosion have received widespread attention.

[0006] The main factors causing combustion and explosion accidents caused by thermal runaway of lithium-ion batteries are: internal short circuit hazards inside the battery and abuse of the battery by users.

[0007] The internal hidden dangers of batteries include two categories: internal hidden dangers of battery cells and internal hidden dangers of battery pack structure design and manufacturing.

[0008] The internal hidden dangers of battery cells are mainly internal short circuits between positive and negative sheets. For example, during charging, lithium dendrites are formed at the bare leakage points of the copper foil formed by shrinkage holes in the graphite coating of the negative copper foil, metal burrs or magnetic impurities and foreign objects penetrate the diaphragm, and the alignment defects between the positive and negative sheets and the diaphragm or insufficient diaphragm coating margin lead to direct short circuits between the positive and negative electrodes. The internal short circuit causes local overheating of the battery and induces thermal runaway.

[0009] The internal hidden dangers in the structural design and manufacturing of battery packs are mainly poor soldering of battery cell series and parallel chain welding connectors, poor thermal management design, electrical circuit short circuit accidents, etc., which lead to local overheating and thermal runaway.

[0010] The main abuse of batteries by users is the misuse of high-voltage chargers that damage the battery management system, the unauthorized modification and disassembly of battery packs, and water seepage inside the battery pack, which leads to overcharging and over-discharging of the battery.

[0011] Among them, 80% of the battery fire accidents currently reported in the electric two-wheeled vehicle industry occurred during the charging process, which actually includes two factors: internal short circuit of the battery cell and overcharging of the battery pack.

[0012] Different technical routes of lithium-ion batteries have very different consequences in the event of thermal runaway.

[0013] Although rigid-shell batteries (square aluminum shells and cylindrical batteries) are designed with pressure relief valves to prevent explosions in extreme situations, explosions still occur from time to time and the consequences are extremely serious.

[0014] When thermal runaway occurs in a ternary battery whose positive electrode is a nickel-cobalt-manganese composite oxide, a large amount of free oxygen is generated inside the battery to assist combustion, so the fire is more intense and the combustion spreads faster.

[0015] Even if lithium-ion batteries do not explode, the flames produced after combustion can easily cause secondary fires.

[0016] If thermal runaway of a lithium battery occurs, the battery cells swell, rupture, or even explode, and the hydrocarbons, carbon oxides, and even hydrogen produced by the combustion of the organic electrolyte quickly accumulate in a confined space, especially during sleep at night, which is the second risk factor that threatens the user's life safety.

[0017] The existing patent CN201721095612 - Lead-acid battery charging protection device for electric vehicles, is to protect the charger rather than the battery.

[0018] Therefore, in order to improve or solve at least one of the above technical problems, a protective device with low cost and capable of effectively ensuring the safety of indoor charging of lithium-ion batteries is now needed. Utility Model Content

[0019] The utility model aims to provide a fire extinguishing mechanism which can play a protective role based on battery charging expansion.

[0020] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0021] A fire extinguishing mechanism for battery charging protection comprises an isolation component for isolating a rechargeable battery from a protective medium; the isolation component can be damaged under the action of the expansion and squeezing force of the rechargeable battery.

[0022] The isolation component comprises an isolation plate; a protective medium is arranged on the side of the isolation component away from the rechargeable battery; and the isolation plate is distributed in the area between the corresponding protective medium and the rechargeable battery.

[0023] The isolation assembly comprises a bottom plate, and a plurality of isolation plates are arranged around the bottom plate; the bottom plate and the isolation plates form a box structure with an opening.

[0024] A battery pad is arranged on the bottom plate.

[0025] The isolation plate is provided with a scratch groove for assisting breaking.

[0026] The isolation plate is provided with a through hole.

[0027] A battery charging container assembly comprises a protective container, the interior of the protective container is hollow to form a working inner cavity, and the fire extinguishing mechanism is arranged in the protective container; the protective medium in the fire extinguishing mechanism is distributed in the area between the isolation component and the protective container.

[0028] The protective container comprises a container shell, an openable smoke-proof cover is arranged on the container shell, and a smoke exhaust pipe is arranged on the smoke-proof cover.

[0029] The smoke-proof cover is connected to the container shell through a clamping mechanism; the clamping mechanism comprises a rotating clamping block fastener rotatably connected to the container shell.

[0030] The container shell is provided with a charger wire adapter plug; the charger wire adapter plug is connected to the battery to be charged through a charger wire adapter.

[0031] The advantages of the utility model are:

[0032] The utility model discloses a fire extinguishing mechanism for battery charging protection and a battery charging container assembly with the fire extinguishing mechanism.

[0033] The fire extinguishing mechanism disclosed by the utility model can provide protection during the battery charging and expansion stage; as the battery charges and expands, the battery squeezes the isolation component in the fire extinguishing mechanism, causing the isolation component to be damaged, and then the protective medium isolated by the isolation component in the fire extinguishing mechanism flows toward the rechargeable battery; thereby achieving a cooling operation of the rechargeable battery, and when the rechargeable battery catches fire, the protective medium can be used to extinguish the fire of the rechargeable battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following is a brief description of the contents expressed in each of the drawings of the utility model specification and the marks in the drawings:

[0035] Figure 1 It is a structural schematic diagram of the utility model.

[0036] Figure 2 It is a side view of the isolation board in the utility model.

[0037] The marks in the above figure are:

[0038] 1. Protective container, 11. Container shell, 12. Charger wire adapter, 13. Charger wire adapter plug;

[0039] 2. fire extinguishing mechanism, 21. isolation assembly, 22. isolation plate, 23. battery gasket, 24. protective medium, 25. bottom plate, 26. through hole;

[0040] 3. Smoke-proof cover, 31 cover body, 32 smoke exhaust pipe; 33. fastener;

[0041] 4. Rechargeable battery. DETAILED DESCRIPTION

[0042] The specific implementation methods of the present utility model will be further explained in detail below by describing the optimal embodiments with reference to the accompanying drawings.

[0043] A fire extinguishing mechanism for battery charging protection comprises an isolation component 21 for isolating a rechargeable battery 4 from a protective medium 24; the isolation component 21 can be damaged under the action of the expansion and squeezing force of the rechargeable battery 4; the fire extinguishing mechanism 2 disclosed in the utility model can provide protection during the battery charging and expansion stage; through the battery charging and expansion, the battery squeezes the isolation component 21 in the fire extinguishing mechanism 2, causing the isolation component 21 to be damaged, and then the protective medium 24 isolated by the isolation component 21 in the fire extinguishing mechanism 2 flows to the rechargeable battery 4; thereby achieving a cooling operation of the rechargeable battery 4, and when the rechargeable battery 4 catches fire, the protective medium 24 can be used to extinguish the fire of the rechargeable battery 4.

[0044] The fire extinguishing mechanism 2 disclosed in the utility model is mainly a mechanical fire extinguishing unit; the battery swells due to charging, and the battery expansion is used as a driving force to squeeze the isolation component 21 to damage it, and then the protective medium 24 realizes the battery cooling and fire extinguishing operation.

[0045] The fire extinguishing mechanism 2 disclosed in the utility model does not require an outward driving force, and the overall production cost is low.

[0046] Specifically, the battery charging protection fire extinguishing mechanism 2 disclosed in the utility model mainly includes an isolation component 21 for isolating the rechargeable battery 4 and the protective medium 24; the isolation component 21 can be damaged under the action of the expansion and squeezing force of the rechargeable battery 4; the utility model sets the isolation component 21 to make it act as a blocking member. When the battery is normally charged, that is, when the battery is normally not bulging, the fire extinguishing mechanism 2 will not participate in the fire extinguishing operation. When the battery bulges, the battery squeezes the isolation component 21, causing the isolation component 21 to be damaged, thereby allowing the protective medium 24 to flow to the rechargeable battery 4, thereby achieving the corresponding fire extinguishing effect.

[0047] In the present invention, the main function of the isolation component 21 is to isolate the protective medium 24 from contacting the rechargeable battery 4, so as to prevent the protective medium 24 from contacting the rechargeable battery 4 when the battery is not expanded, thereby affecting the normal charging and service life of the rechargeable battery 4.

[0048] In the present invention, the protective medium 24 is generally water, but other media are also feasible. The reason why the present invention uses water is that water as the protective medium 24 has extremely low use cost.

[0049] In the present invention, the protective medium 24 plays the role of cooling and extinguishing fire. Before the rechargeable battery burns, that is, before the rechargeable battery fire starts, the external temperature of the battery is reduced to prevent the battery from triggering thermal runaway. In actual use, the protective medium is generally water, but other media are also feasible. The reason why the present invention uses water as the protective medium 24 is that water has an extremely low cost of use. Of course, the protective medium is not limited to water, and other aqueous solutions with high heat capacity, non-combustibility and high fluidity are also feasible.

[0050] At the same time, the protective medium also has the function of absorbing harmful components formed after the battery burns.

[0051] In other words, the protective medium disclosed in the present invention has three main functions: cooling, extinguishing fire and partially absorbing harmful components.

[0052] In the utility model, the fire extinguishing mechanism 2 is arranged at the peripheral position of the placement area; the isolation component 21 can be damaged and leak out the protective medium 24 after being acted upon by the rechargeable battery 4; the utility model arranges the fire extinguishing mechanism 2 at the peripheral position of the placement area, so that in subsequent use, it is convenient for the rechargeable battery 4 to expand, and the rechargeable battery 4 can quickly act on the isolation component 21, so that the isolation component 21 is damaged and the isolation component 21 loses its isolation function, so that the protective medium 24 moves to the side of the rechargeable battery 4, and the corresponding fire extinguishing and cooling operations are achieved; at the same time, it should be noted here that the rechargeable battery 4 of the utility model mainly applies mechanical extrusion force to the isolation component 21, and the mechanical extrusion force is used to achieve the damage of the isolation component 21, so that the normal flow of the protective medium 24 is achieved.

[0053] Furthermore, in the utility model, the isolation component 21 includes an isolation plate 22; a protective medium 24 is provided on the side of the isolation component 21 away from the rechargeable battery 4; the isolation plate 22 is distributed in the area between the corresponding protective medium 24 and the rechargeable battery 4; the isolation component 21 is also a component that plays an isolation role, and in the utility model, the isolation component 21 includes an isolation plate 22; the isolation plate 22 is distributed in the area between the corresponding protective medium 24 and the rechargeable battery 4; the setting of the isolation plate 22, as the name implies, is used to separate the protective medium 24 and the rechargeable battery 4 to prevent the protective medium 24 from flowing to the rechargeable battery 4; at the same time, in the utility model, the isolation plate 22 can be a separate plate structure, or it can be part of an assembly, and its main function is to separate and partition the rechargeable battery 4 from the protective medium 24.

[0054] When the isolation plate 22 disclosed in the present invention exists alone, the isolation plate 22 needs to be used in conjunction with the protective container 1 so that it and the inner wall of the protective container 1 form a box structure, which is convenient for storing the corresponding protective medium 24.

[0055] Furthermore, in the utility model, the isolation component 21 includes a bottom plate 25, and a plurality of isolation plates 22 are arranged around the bottom plate 25; the bottom plate 25 and the isolation plates 22 form a box structure with an opening; based on such a setting, the isolation component 21 itself is a box structure with an opening, and such a design, when used subsequently, the space inside the isolation component 21 is the placement area for the battery 4 to be charged; the utility model adopts the above-mentioned design, so that the protective medium 24 can be directly injected into the protective container 1, and at the same time, the size of the isolation component 21 can be designed as needed, and a small-sized isolation component 21 can be made for protective operations on the rechargeable battery 4.

[0056] At the same time, in the present invention, the isolation component 21 can be designed as an integrated whole with the protective container 1, or can be designed as a split type. In the case of a split type, the two can be connected by means of a snap or other connection method.

[0057] At the same time, in the utility model, each isolation plate 22 and the bottom plate 25 can be designed as an integrated whole or assembled in pieces. The integrated design can ensure the integrity of the isolation component 21, while the piece-by-piece assembly to form the isolation component 21 can facilitate the early transportation and transfer of the entire device.

[0058] In the utility model, a battery gasket 23 is provided in the isolation component 21, and a battery gasket 23 is provided on the bottom plate 25; the battery gasket 23 plays a certain role in raising the height, which is not only convenient for subsequent test operations, but also conducive to heat dissipation of the rechargeable battery 4 in actual use.

[0059] Furthermore, in the utility model, a scratch groove 221 for assisting fracture is provided on the isolation plate 22; in the utility model, the scratch groove 221 is provided mainly to reduce the overall structural strength of the isolation plate 22, so as to facilitate subsequent breakage under the squeezing of the rechargeable battery 4, thereby facilitating the protective medium 24 to pass through the isolation plate 22 and flow to the rechargeable battery 4.

[0060] At the same time, in order to facilitate the insertion of wires in the present invention, a through hole 26 is provided on the isolation plate 22. Such a configuration facilitates the insertion of wiring harnesses such as adapter wires.

[0061] A battery charging container assembly includes a protective container 1, wherein the interior of the protective container 1 is hollow to form a working inner cavity, and the fire extinguishing mechanism 2 is arranged in the protective container 1; the protective medium 24 in the fire extinguishing mechanism 2 is distributed in the area between the isolation component 21 and the protective container 1;

[0062] The utility model can protect the rechargeable battery 4 during charging by using the protective container 1 and the fire extinguishing mechanism 2 in coordination; at the same time, the overall structure of the convenient and open charging protection device is relatively simple and low in cost, and can achieve isolation and protection of the rechargeable battery 4 during indoor charging, thereby avoiding economic losses caused by battery combustion during indoor charging.

[0063] The charging protection device disclosed in the present utility model is mainly suitable for protecting soft-pack lithium-ion batteries during indoor charging; however, it does not mean that it cannot be used for charging protection operations of other batteries; in theory, the charging protection device disclosed in the present utility model can be used for charging protection operations of any rechargeable battery 4; it mainly has a better protective effect on indoor charging of soft-pack lithium batteries, and can also achieve a good protection effect at the lowest price.

[0064] Specifically, the charging protection device disclosed in the utility model mainly includes a protection container 1, which mainly plays a role of isolation and protection, and also facilitates the arrangement of the battery 4 to be charged, and also facilitates the arrangement and placement of the subsequent protection medium 24 and the fire extinguishing mechanism 2; in actual design, the protection container 1 can be made of insulating material or other materials, and the specific material can be selected according to needs.

[0065] In addition, in the utility model, a placement area for placing the rechargeable battery 4 is provided in the protective container 1; the placement area here is mainly for the convenience of placing the rechargeable battery 4, and is essentially to form a space in the protective container 1 to facilitate the placement of the battery 4 to be charged. In the utility model, the above-mentioned placement area can be assembled by isolation plates 22, or it can be an area enclosed when the various fire extinguishing mechanisms 2 are distributed at intervals.

[0066] The fire extinguishing mechanism 2 is mainly used to cool down the rechargeable battery 4, which essentially has the function of extinguishing fire and preventing thermal runaway of the battery.

[0067] The type of fire extinguishing mechanism 2 can be selected as needed, and essentially any fire extinguishing mechanism 2 that can achieve battery cooling and fire extinguishing operations can be used.

[0068] Furthermore, in the utility model, the protective container 1 includes a container shell 11, on which a charger wire adapter plug 13 is provided; the charger wire adapter plug 13 is connected to the battery to be charged 4 through a charger wire adapter 12; based on such a configuration, it is convenient for the corresponding power charger to be connected to the rechargeable battery 4 in the protective container 1, so as to facilitate subsequent charging operations.

[0069] Furthermore, in the utility model, the protective container 1 includes a container shell 11; the container shell 11 is provided with a smokeproof cover 3, the container shell 11 is provided with an openable smokeproof cover 3, and the smokeproof cover 3 is provided with a smoke exhaust pipe 32; the smokeproof cover 3 covers the container shell 11, so that the protective container 1 has an overall sealing effect to avoid subsequent spillage of the protective medium 24.

[0070] Meanwhile, in the present invention, the smoke-proof cover 3 is connected to the container shell 11 via a snap-fit ​​mechanism; the snap-fit ​​mechanism comprises a rotating block fastener 33 rotatably connected to the container shell 11 , and the rotating block fastener 33 can be snap-fitted to the edge of the smoke-proof cover 3 .

[0071] The smoke-proof cover 3 comprises a cover body 31 , and a snap-fit ​​flange is arranged at the edge of the cover body 31 , so that the vertical cross section of the smoke-proof cover 3 is an inverted U-shape, and such a configuration facilitates the sleeve installation of the smoke-proof cover 3 on the container shell 11 .

[0072] In addition, in the present invention, a sealing member is provided in the contact area between the smoke-proof cover 3 and the container shell 11 , thereby ensuring the airtightness of the protective container 1 .

[0073] Of course, in order to discharge smoke or other gases in the smoke-proof container, the utility model requires that a smoke exhaust pipe 32 be provided on the protective cover. The smoke exhaust pipe 32 can be connected to an external pipeline to lead the exhaust gas in the protective container 1 to the outside, thereby preventing the exhaust gas in the protective container 1 from polluting the indoor environment.

[0074] specific:

[0075] The utility model discloses an indoor charging protection device for a soft-pack lithium battery; the indoor charging protection device disclosed by the utility model does not need to design a separate energy source, nor does it need a separate control system, and can use the inherent characteristics of existing extremely simple components to achieve excellent use effects.

[0076] In other words, the soft-pack lithium battery indoor charging protection device disclosed in the present invention can achieve the protection function of the rechargeable battery 4 at an extremely low cost.

[0077] It is essentially different from existing battery protection.

[0078] The indoor charging protection device for soft-pack lithium batteries disclosed in the utility model mainly comprises a protection container 1 and a fire extinguishing mechanism 2 arranged inside or outside the protection container 1 .

[0079] The fire extinguishing mechanism 2 of the present invention has the following specific structure due to different installation positions and usage states.

[0080] The fire extinguishing mechanism 2 includes an isolation component 21, and the isolation component 21 includes an isolation plate 22; the isolation plate 22 is distributed in the area between the corresponding protective medium 24 and the rechargeable battery 4; the isolation component 21 includes a bottom plate 25, and a plurality of isolation plates 22 are arranged around the bottom plate 25; the bottom plate 25 and the isolation plate 22 form a box structure with an opening at the upper end.

[0081] As for the isolation component 21 and isolation plate 22 disclosed in the utility model, the material composition can be one or more rigid materials such as glass plate, plexiglass plate, plastic plate, metal plate, ceramic plate, marble plate, composite material plate, etc.; each isolation plate 22 in the isolation component 21 can be bonded and formed by an adhesive.

[0082] At the same time, a scratch groove 221 is provided on the surface of the plate of one or more isolation plates 22 in the isolation assembly 21, so as to ensure that the expansion and compression force of the battery can easily cause the outer shell to rupture and release water.

[0083] The utility model requires that the box structure composed of the isolation component 21 has a rigid contact distance between at least two opposite surfaces of the isolation component 21 and the longitudinal outer surface of the battery pack of 0.01mm to 20mm (the distance after deducting the maximum surface dimension of the rigid object placed between the outer surface of the isolation component 21 and the adjacent battery longitudinal vertical surface).

[0084] In addition, the protective container 1 and the fire extinguishing mechanism 2 disclosed in the utility model can be made into an integrated structure or a split structure. The essence is that the isolation component 21 is directly connected to the inner wall of the protective container 1, or the connection between the isolation component 21 and the protective container 1 is achieved through fasteners or auxiliary connecting parts.

[0085] In addition, the protective container 1 of the utility model can be designed as a split type or an integrated structure, and can be selected for use according to needs; in order to facilitate the placement and use of the rechargeable battery 4, an opening must be provided on the protective container 1 of the utility model for the placement and removal of the rechargeable battery 4.

[0086] The protective container 1 disclosed in the utility model can be 1) a rigid container, 2) a flexible container, 3) a container that is partially rigid and partially flexible; (B) the volume range of the protective container 1 is 1000 cubic centimeters to 10 cubic meters, which is as roughly equivalent to the size of the battery placed therein as possible; (C) at the same time, the protective container 1 is required to be able to maintain non-combustion and non-softening for 10 seconds to 30 minutes at a high temperature of 100 to 1000°C, ensuring that the combustion of the battery placed therein is terminated and the temperature is lowered to a point where there is no longer a fire hazard, and the above-mentioned protective container 1 can continue to maintain the fire prevention and gas leakage prevention functions; and (D) it can be connected to the exhaust pipe 32 to ensure that when the battery burns, the gas in the above-mentioned protective container 1 can be smoothly discharged to the outside through the above-mentioned exhaust pipe 32.

[0087] In summary, the protective container 1 can be a hard shell box or a flexible bag, with a box-shaped object being more preferred.

[0088] Its volume, that is, the size of the box, can be slightly larger than the battery to be charged. For example, a volume that is twice the volume of the battery is large enough, and a range of 1.2 to 1.5 times the volume of the battery is optimal.

[0089] If the temperature resistance of the protective container 1 is too poor, the protective container 1 will burn and deform severely before the burning battery is extinguished, causing the flame or toxic, flammable and explosive exhaust gas to leak into the room, and the protection function involved in the utility model cannot be achieved. Since the battery specifications and types targeted by the utility model generally take a few seconds to a few minutes to complete the fire extinguishing time, it is sufficient for the protective container 1 to maintain 10 minutes at high temperature to complete the protection function involved in the utility model. The temperature rise of the protective container 1 caused by combustion depends on the number of burning cells of the battery, whether other materials have been burned, and the length of time of burning. According to test data, after the battery involved in the utility model is completely burned, the highest temperature is about 1000℃, and it is a temperature reached after several minutes of continuous burning. Therefore, the high temperature resistance range of the protective container 1 is set to 100~1000℃, the higher the high temperature resistance, the better, and the high temperature resistance time at this temperature is 10 seconds to 10 minutes. The longer the high temperature resistance time, the better, but the higher the material requirements, the higher the cost. Another important function of the protective container 1 is to be tightly connected with the smoke exhaust pipe 32 to facilitate the exhaust gas generated by the combustion of the battery to be discharged outdoors to prevent toxic gases from harming health, and at the same time prevent the flammable and explosive exhaust gas from forming a concentration of explosion limit indoors to induce secondary fire accidents.

[0090] The shape of the protective container 1, a rigid container or a flexible container after inflation is characterized in that it is one or more of the following shapes: 1) cylinder, 2) original cone, 3) cube, 4) rectangular parallelepiped, 5) trapezoidal column, 6) a special shape combining circle and square.

[0091] Taking the protective container 1 as an example, a cube or a rectangular parallelepiped is better, which is convenient for sheet metal processing and better matches the cube or rectangular parallelepiped shape of the battery pack.

[0092] Taking the protective container 1 as an example, in order to prevent fire and smoke, the protective container 1 needs a cover or hood. It is best to have a smoke cover 3 from the top of the protective container 1. The smoke cover 3 can be connected to the container shell 11 through a mechanism such as a hinge, or it can be an independent component that can be removed independently.

[0093] Regardless of the method, during the charging process, it is best to have a certain fixing method between the smokeproof cover 3 and the combination, so that the high-temperature gas generated by the combustion of the battery will open the smokeproof cover 3, causing the flame or high-temperature exhaust gas to spread and leak into the room.

[0094] The protective container 1 and / or the exhaust gas smoke exhaust pipe 32 of the utility model are characterized in that the materials used include one or more of the following: stainless steel; iron or iron alloy; aluminum or aluminum alloy; copper or copper alloy; zinc or zinc alloy; glass fiber or a composite material made by mixing glass fiber with other materials; resin or a composite material formed by resin and glass, or carbon, or metal; carbon fiber or a composite material made by mixing carbon fiber with other materials; wooden material coated with fireproof material; bamboo material coated with fireproof material; ceramic or a composite material made by mixing ceramic with other materials; glass or a composite material made by mixing glass with other materials; cement or a composite material made by mixing cement with other materials; clay or a composite material made by mixing clay with other materials; silicone rubber or a composite material made by mixing silicone rubber with other materials; fluororubber or a composite material made by mixing fluororubber with other materials; flame retardant polymer material; composite material of flame retardant polymer material and metal;

[0095] Taking the protective container 1 as an example, the best material is iron sheet, which is low in cost and easy to process.

[0096] The thickness of the material of the protective container 1 and / or the exhaust gas pipe 32 is in the range of 0.1 mm to 200 mm.

[0097] Taking the iron sheet protective container 1 as an example, the optimal thickness range of the iron sheet is 2-5 mm. If it is too thin, the protective container 1 is easily deformed and cannot guarantee to prevent the leakage of flames or high-temperature exhaust gas. If it is too thick, the cost is high and the weight is heavy and inconvenient to use.

[0098] The utility model makes full use of the effect that the soft-pack battery will first expand severely when overcharged, and the expansion generates a large mechanical squeezing force, which can be used as a low-cost mechanical squeezing trigger to cut off the power.

[0099] The smoke exhaust pipe 32 involved in the present invention can be one or more of the following modes: 1) a rigid pipe, 2) a flexible pipe, and 3) a pipe that is a combination of a partially rigid pipe and a partially flexible pipe.

[0100] The exhaust pipe 32 is required to have a length ranging from 1 cm to 10 m, and can be extended to the shortest dimension required for an outdoor exhaust port location (eg, outside a window louver, inside a range hood, or outside an exhaust fan port).

[0101] It is required to be able to maintain no combustion, fusion or blockage for 10 seconds to 30 minutes at a high temperature of 100 to 1000°C, to ensure that the waste gas exhaust pipe 32 can continuously discharge the waste to the outside before the combustion of the battery placed in the above-mentioned protective container 1 is terminated and no harmful waste gas or flammable and explosive gas is generated; and it can be connected with the above-mentioned protective container 1 to ensure that even when the battery burns, the gas in the above-mentioned protective container 1 can be smoothly discharged to the outside through the above-mentioned exhaust pipe 32.

[0102] In short, taking the exhaust pipe 32 as an example, either an iron pipe or a flame-retardant plastic pipe can be used, and a flexible flame-retardant plastic pipe is best at the end to ensure that the battery is best charged near a balcony or window. The exhaust pipe 322-3 meters is best.

[0103] The smoke exhaust pipe 32 and the protective container 1 can be connected by a threaded pipe adapter or by an elastic sleeve connection between a silicone tube and a metal tube.

[0104] The protective medium 24 disclosed in the present invention may be water, which may be (A) pure water; (B) tap water; (C) salt water; (D) flame retardant antifreeze liquid, etc.

[0105] In winter in the north where there is no heating, the water mentioned above is prone to freeze below the freezing point, causing delayed fire extinguishing. It is best to use salt water or flame retardant antifreeze to lower the freezing point.

[0106] Obviously, the specific implementation of the present invention is not limited by the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A fire extinguishing mechanism for battery charging protection, characterized in that: It comprises an isolation component for isolating a rechargeable battery from a protective medium; the isolation component can be damaged under the action of the expansion and squeezing force of the rechargeable battery; the isolation component comprises an isolation plate; a protective medium is arranged on the side of the isolation component away from the rechargeable battery; the isolation plate is distributed in the area between the corresponding protective medium and the rechargeable battery.

2. A fire extinguishing mechanism for battery charging protection according to claim 1, characterized in that: The isolation assembly comprises a bottom plate, and a plurality of isolation plates are arranged around the bottom plate; the bottom plate and the isolation plates form a box structure with an opening.

3. A fire extinguishing mechanism for battery charging protection according to claim 2, characterized in that: A battery pad is arranged on the bottom plate.

4. A fire extinguishing mechanism for battery charging protection according to any one of claims 1 to 3, characterized in that: The isolation plate is provided with a scratch groove for assisting breaking.

5. A fire extinguishing mechanism for battery charging protection according to any one of claims 1 to 3, characterized in that: The isolation plate is provided with a through hole.

6. A battery charging container assembly, characterized in that: It comprises a protective container, the interior of which is hollow to form a working inner cavity, and the protective container is provided with a fire extinguishing mechanism for battery charging protection as claimed in any one of claims 1 to 5; the protective medium in the fire extinguishing mechanism is distributed in the area between the isolation component and the protective container.

7. A battery charging container assembly according to claim 6, characterized in that: The protective container comprises a container shell, an openable smoke-proof cover is arranged on the container shell, and a smoke exhaust pipe is arranged on the smoke-proof cover.

8. A battery charging container assembly according to claim 7, characterized in that: The smoke-proof cover is connected to the container shell through a clamping mechanism; the clamping mechanism comprises a rotating clamping block fastener rotatably connected to the container shell.

9. A battery charging container assembly according to claim 8, characterized in that: The container shell is provided with a charger wire adapter plug; the charger wire adapter plug is connected to the battery to be charged through a charger wire adapter.

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