Explosion prevention device for portable generator

Abstract

The present invention discloses an explosion prevention device for a portable shaft generator. The present invention comprises a body having a handle for carrying on the upper part, a closed-circuit driving member that performs external power charging and outputs the charged power, and a mounting part for a secondary battery that is charged by an external power on the outer surface, a secondary battery that is charged by an external power at the mounting part and discharged by the driving of the closed-circuit driving member, an explosion-proof member that prevents the expansion and explosion of the secondary battery due to overcharging between the secondary battery and the mounting part, and an expansion absorption space that controls the expansion of the outer cover of the secondary battery between the secondary battery and the explosion-proof member.

Description

Technology Field

[0001] The present invention relates to an explosion prevention device for a portable shaft generator capable of self-generation, and more specifically, to a portable shaft generator that is configured to supply power outdoors, is capable of self-generation that can generate power manually when the battery is discharged, and prevents the explosion of a secondary battery when overcharged. Background Technology

[0002] Generally, electronic devices are powered by commercial electricity supplied through power outlets, while portable electronic devices have built-in batteries capable of storing power, allowing them to be used outdoors by receiving power from the battery.

[0003] However, the battery's power supply time varies depending on the power consumption of the electronic device being used, and if all the stored power is depleted, the power to the electronic device is cut off, making it impossible to use the device.

[0004] To this end, a portable shaft generator with a built-in large-capacity battery has been developed to enable long-term use of electronic devices even outdoors, and various power supply terminals are formed to supply power to electronic devices.

[0005] A secondary battery, also called a storage battery, rechargeable battery, or battery, is a battery designed to convert external electrical energy into chemical energy for storage and reuse.

[0006] These secondary batteries are more economical and environmentally friendly than primary batteries that cannot be reused. Compared to primary batteries around us, they are several to tens of times more expensive, but generally have the advantage of being reusable more than 500 times.

[0007] Therefore, its use as a next-generation energy source is increasing day by day in various fields, including electronic products such as smartphones, tablet PCs, and laptops, as well as electric vehicles and motorcycles, and countries are engaged in fierce development competition to secure a technological advantage.

[0008] Recently, research on Personal Air Vehicles (PAVs) has been conducted as a next-generation means of transportation that combines the functions of automobiles and airplanes with IT technology. Secondary batteries are used as an energy source for PAVs, and in this regard, there is a demand for lighter secondary batteries and increased output.

[0009] Under these circumstances, the importance of research and development for pouch-type secondary batteries, in which lightweight sheets are used as the case for the aforementioned secondary battery, is increasing.

[0010] Conventional pouch-type secondary batteries had a serious problem in that if the temperature and pressure inside the pouch increased due to overcharging, internal short circuits, etc., the pouch would expand and, in severe cases, explode, causing injury.

[0011] Accordingly, a fire spread prevention structure based on the development of a technology that can increase the output of a pouch-type secondary battery while eliminating expansion and preventing explosion has been proposed in Korean Patent Publication No. 10-2024-0034926 (hereinafter referred to as the 'Previous Invention').

[0012] According to the prior invention, the invention is configured to prevent the spread of abnormal phenomena, such as fire or heat generation, to the surroundings when they occur in a plurality of battery cells, and comprises a module case having a structure that accommodates the plurality of battery cells and surrounds the plurality of battery cells in a circumferential direction, wherein the module case is a fire-resistant foamed case comprising a foamed material capable of shielding to prevent flames or smoke generated in the plurality of battery cells from being transmitted to the outside by foaming and expanding due to heat. The purpose is to rapidly suppress the thermal runaway of the battery cells at an early stage when a fire occurs in the battery cells and to rapidly block the spread of heat to adjacent battery cells, but there is a problem in that it is not easy to install a fire-resistant foamed member between the cells inside the battery, and since the explosive force is continuously maintained, it is vulnerable to fire. Prior art literature

[0013] Republic of Korea Published Patent No. 10-2024-0034926 (Published March 15, 2024) The problem to be solved

[0014] The present invention relates to a secondary battery, wherein the expansion force of the secondary battery, which expands due to gas generated inside the secondary battery by overcharging the secondary battery, is inhibited, thereby preventing safety accidents caused by explosions.

[0015] In addition, the expanding gas caused by overcharging is exhausted just before the explosion, thereby completely extinguishing the explosive force, which prevents the occurrence of fire and protects property and human lives. means of solving the problem

[0016] The present invention, which solves the problems of the prior art, provides a configuration comprising a body having a handle for carrying on its upper surface, a closed-circuit driving member that performs external power charging and outputs the charged power, and a mounting portion for a secondary battery that is charged by an external power source on its outer surface, a secondary battery that is charged by an external power source at the mounting portion and discharged by the driving of the closed-circuit driving member, and an explosion-proof member that prevents the expansion and explosion of the secondary battery due to overcharging in the secondary battery and the mounting portion.

[0017] In a configuration in which the objective of the present invention is achieved, the mounting portion comprises a hole sized to accommodate the secondary battery and an opening / closing plate that opens and closes the open front portion of the hole, wherein it is preferable that each side of the hole and the opening / closing plate are provided with a buffer plate that absorbs shock in the event of an explosion of the secondary battery.

[0018] In a configuration in which the objective of the present invention is achieved, the buffer plate is preferably configured to consist of a buffer material that is adhered to the groove surface of the mounting portion to form a shock-absorbing layer, and a support member that is adhered to the outer surface of the buffer material and contacts the outer cover of the secondary battery.

[0019] In a configuration in which the objective of the present invention is achieved, the explosion-proof member is preferably configured such that an inner plate encloses the outer cover of the secondary battery, an outer plate overlaps the outer surface of the inner plate, and an explosion-proof band is installed between the inner plate and the outer plate, the explosion-proof band having a shock-absorbing layer.

[0020] In the configuration in which the objective of the present invention is achieved, it is preferable that the shock-absorbing layer formed between the inner plate and the outer plate of the explosion-proof band be configured such that the cross-section of the explosion-proof band is formed in a honeycomb structure.

[0021] In addition, the present invention, which solves the problems of the prior art, provides a configuration in which a handle for carrying is provided on the upper part, a closed-circuit driving member that performs external power charging and outputs the charged power is provided inside, and a mounting part for a secondary battery that is charged by an external power is provided on the outer surface, a secondary battery that is charged by an external power at the mounting part and discharged by the driving of the closed-circuit driving member, an explosion-proof member that prevents the expansion and explosion of the secondary battery due to overcharging between the secondary battery and the mounting part, and an expansion absorption space that controls the expansion of the outer cover of the secondary battery between the secondary battery and the explosion-proof member, thereby fully achieving the objective.

[0022] In a configuration in which the objective of the present invention is achieved, the shock-absorbing hole is preferably configured to consist of a support beam installed at the corner of the secondary battery and an explosion-proof member wrapped around the outside of the secondary battery including the support beam.

[0023] In a configuration where the objective of the present invention is achieved, it is preferable that the support member be installed at a predetermined height in an inclined direction at the corner of the secondary battery so that the explosion-proof member is tensioned.

[0024] In a configuration in which the objective of the present invention is achieved, the shock-absorbing layer is preferably configured to consist of an exhaust pin having a tip shaped like an advanced tip, and a pin head formed such that the exhaust pin protrudes toward the outer cover of the secondary battery and is adhered to the inner surface of the explosion-proof member on the other side. Effects of the invention

[0025] The present invention provides the advantage of preventing damage to facilities, the natural environment, and human lives in advance by limiting the expansion and explosion of the external cover of the secondary battery so that the secondary battery does not explode when it is overcharged by charging for a long time for use indoors and outdoors. Brief explanation of the drawing

[0026] FIG. 1 is an exploded perspective view showing the mounting structure of a secondary battery of a portable shaft generator to which the present invention is applied. FIG. 2 is a cross-sectional view of the structure of the buffer plate according to the present invention. FIG. 3 is an enlarged structural diagram of the outer cover of a secondary battery according to the present invention. FIG. 4 is a longitudinal cross-sectional view showing the structure of a secondary battery mounting chamber according to the present invention. FIG. 5 is a longitudinal cross-sectional view showing the structure of an explosion-proof member of the present invention. FIG. 6 is a longitudinal cross-sectional view showing an example of an explosion-proof member according to the present invention. FIG. 7 is an expansion control state diagram of a secondary battery in an example embodiment of an explosion-proof member of the present invention. Specific details for implementing the invention

[0027] Specific embodiments in which the present invention can be implemented are described below with reference to the accompanying drawings.

[0028] These embodiments are described in sufficient detail to enable a person skilled in the art to practice the invention, and it should be understood that various embodiments of the invention are different but need not be mutually exclusive.

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings in order to enable a person skilled in the art to easily practice the present invention.

[0030] Figure 1 shows a separated state illustrating the mounting structure of a secondary battery of a portable shaft generator to which the present invention is applied.

[0031] A portable shaft generator (100) that attempts to generate power by turning a lever by hand and charges the generated power is provided with a handle (120) for carrying on the upper part of the body (110), a closed-circuit driving member that charges external power and outputs the charged power is provided inside the body (110), and a mounting part (130) for a secondary battery (200) that is charged by external power is provided on the outer surface of the body (110).

[0032] The mounting portion (130) provided on the body (110) is formed with a concave mounting hole (131) sized to accommodate the secondary battery (200), and a plug (133) is provided inside the mounting hole (131) to induce charging of power supplied from the outside or generated by self-generation.

[0033] A secondary battery (200) formed of a material that allows power generated by a manual operation of holding and turning an unpainted handle or external power to be charged or discharged is formed in a size that is inserted into and mounted in the mounting hole (131) of the mounting part (130), and a connector (230) is provided on an outer cover (210) that surrounds the outer surface of the charging and discharging material to be electrically connected to a closed-circuit driving member inside the body (110).

[0034] The above mounting portion (130) is composed of a mounting hole (131) sized to accommodate the secondary battery (200) and an opening / closing plate (140) that opens and closes the open front portion of the mounting hole (131). Each side of the mounting hole (131) and the opening / closing plate (140) are provided with a buffer plate (300) that limits the expansion of the outer cover (210) of the secondary battery (200) to the maximum extent in the event of an explosion caused by the expansion of the secondary battery (200), thereby mitigating the explosive force generated by the characteristics of the material.

[0035] Figure 2 is a cross-sectional view showing the structure of the buffer plate in the present invention.

[0036] The above buffer plate (300) is formed with a buffer material (310) that is adhered to the surface of the mounting hole (131) of the mounting part (130) to form a shock-absorbing layer, and a support (330) that is adhered to the outer surface of the buffer material (310) to maintain the shock-absorbing layer and contacts the outer cover (210) of the secondary battery (200).

[0037] The shock-absorbing layer formed on the cushioning material (310) is formed by bending the cushioning material (310) into a wave shape to create alternating spaces between the mounting hole (131) surface and the exterior cover (210), so that when a sudden impact comes into contact, the repulsive force resulting from the action of the alternating spaces being pressed in mutually staggered directions offsets the impact.

[0038] Figure 3 shows an enlarged structure of the outer cover of a secondary battery according to the present invention.

[0039] The secondary battery (200) is formed such that an explosion-proof member (400) is wrapped around the outer surface of the outer cover (210) forming the secondary battery (200) to prevent the explosion of the secondary battery (200) caused by failure to block expansion due to overcharging when charging power.

[0040] The explosion-proof member (400) is composed of an inner plate (410) that surrounds the outer cover (210) of the secondary battery (200) and an outer plate (430) that overlaps the outer surface of the inner plate (410), and an explosion-proof band (450) having an impact-absorbing layer is installed between the inner plate (410) and the outer plate (430) to improve the shock absorption rate of the explosion-proof member (400).

[0041] That is, the cross-section of the explosion-proof band (450) formed between the inner plate (410) and the outer plate (430) of the explosion-proof member (400) is formed into a honeycomb structure.

[0042] Accordingly, the explosion-proof band (450) is provided with a honeycomb structure inside the explosion-proof member (400).

[0043] FIG. 4 shows a longitudinal cross-section showing the structure of a secondary battery mounting chamber in the present invention, and FIG. 5 shows a longitudinal cross-section showing the structure of an explosion-proof member in the present invention.

[0044] The explosion-proof band (450) of the above honeycomb structure forms an impact absorption layer in the space between the inner plate (410) and the outer plate (430), and wraps around the outer surface of the outer cover (210) of the secondary battery (200), thereby creating a state in which the secondary battery (200), including the explosion-proof member (400), is protected in the mounting hole (131) of the body (110).

[0045] That is, the structure is characterized by a double shock-absorbing layer formed by a cushioning material (310) and an explosion-proof band (450) between the outer cover (210) of the secondary battery (200), the mounting hole (131), and the opening / closing plate (140) to prevent and stop the explosion of the secondary battery (200).

[0046] In this way, the dual shock-absorbing structure for preventing and preventing expansion and explosion of the outer cover (210) of the secondary battery (200) has the effect of primarily counteracting the expansion force when the outer cover (210) expands due to the internal expansion phenomenon of the secondary battery (200) by being restrained by the spatial characteristic structure of the shock-absorbing layer of the explosion-proof band (450) of the explosion-proof member (400).

[0047] Even after such primary expansion force counteracting action, if the secondary battery (200) continues to expand inside, when the outer cover (210) of the secondary battery (200) comes into contact with the buffer plate (300) while the primary expansion force is restrained, a secondary expansion force counteracting action is applied.

[0048] The secondary expansion force offsetting action is achieved when the outer cover (210) of the secondary battery (200) continues to expand while the primary expansion force is applied, and comes into contact with the buffer plate (300) together with the explosion-proof member (450). At this time, the expansion force resulting from the contact is absorbed by the shock absorption layer of the wave-shaped buffer material (310) provided on the buffer plate (300) due to the spatial characteristic structure, thereby causing the secondary expansion force offsetting action to be achieved.

[0049] (Example 1)

[0050] FIG. 6 shows a longitudinal section illustrating an example embodiment of an explosion-proof member of the present invention,

[0051] A portable shaft generator (100) that allows a user to attempt to generate power by turning a lever with their hand, as shown in FIGS. 1 to 5, has a handle (120) for carrying on the upper part of the body (110), a closed-circuit driving member that charges external power and outputs the charged power is provided inside the body (110), and a mounting part (130) for a secondary battery (200) that is charged by external power is provided on the outer surface of the body (110).

[0052] The mounting portion (130) provided on the body (110) is formed with a concave mounting hole (131) of a size that can accommodate the secondary battery (200), and a plug (133) is provided inside the mounting hole (131) to induce charging of power supplied from the outside or generated by self-generation.

[0053] The secondary battery (200) is formed to a size that is inserted into and mounted in the mounting hole (131) of the mounting part (130), and an outer cover (210) that surrounds the outer surface of the secondary battery (200) is provided with a connector (230) that forms an electrical connection with the plug (133).

[0054] And, the mounting portion (130) is composed of a mounting hole (131) sized to accommodate the secondary battery (200) and an opening / closing plate (140) that opens and closes the open front portion of the mounting hole (131), and each side of the mounting hole (131) and the opening / closing plate (140) are provided with a buffer plate (300) that prevents the expansion of the outer cover (210) of the secondary battery (200) as much as possible and mitigates the explosive force of the secondary battery (200) due to the characteristics of the material.

[0055] In this embodiment, an expansion absorption space (500) is provided between the secondary battery (200) and an explosion-proof member (400) that prevents the expansion and explosion of the secondary battery (200) to control the expansion of the outer cover (210) of the secondary battery (200) and thereby eliminate the explosion.

[0056] FIG. 7 shows the expansion control state of a secondary battery in one embodiment of the explosion-proof member of the present invention.

[0057] In the above secondary battery (200), a shock absorption hole (500) is formed between the outer cover (210) and the explosion-proof member (400) to directly control and eliminate the expansion of the outer cover (210) due to overcharging and the resulting explosion.

[0058] The shock absorption hole (500) is formed with a predetermined width over the entire circumference of the outer cover (210) of the secondary battery (200) by means of a support beam (510) installed at each corner of the secondary battery (200), and the support beam (510) is installed at a predetermined height at the corner of the secondary battery (200) so that the explosion-proof member (400) is tensioned.

[0059] The shock absorption hole (500) comprises an exhaust pin (531) having a tip shaped like a tip, and a pin head (533) formed such that the exhaust pin (531) protrudes toward the outer cover (210) of the secondary battery (200) and is attached to the inner plate (410) of the explosion-proof member (400) on the other side.

[0060] In the above embodiment, when the secondary battery (200) is mounted on the body (110) of the portable shaft generator (100) and charged for a long time, the external cover (210) swells up due to the expansion phenomenon inside the secondary battery (200), resulting in a state as shown in FIG. 7, and if this expansion continues, it leads to the external cover (210) of the secondary battery (200) exploding.

[0061] As the outer cover (210) continues to expand, a certain amount of expansion is absorbed into the shock absorption hole (500). As the expansion progresses further, the outer cover (210) comes into contact with the expansion control body (530) attached to the inner plate (410) of the explosion-proof band (450) that forms the shock absorption hole (500). The expansion force of the outer cover (210) is pressed by the exhaust pin (531) of the expansion control body (530), and the tip of the exhaust pin (531) penetrates the surface of the outer cover (210).

[0062] When the exhaust pin (531) penetrates the surface of the expanding outer cover (210), the expansion pressure inside the secondary battery (200) is naturally discharged through the hole and gap created by the exhaust pin (531), and thus the expansion pressure inside the secondary battery (200) is removed, resulting in the extinguishing of the explosive force.

[0063] The expansion force is removed by making holes in several places of the external cover (210) before the external cover (210) expands due to overcharging of the secondary battery (200) explodes, thereby keeping the portable shaft generator (100) in a safe state. If this overcharging state occurs when there are no people nearby, the risk of fire spreads and even precious lives are threatened. Therefore, the elimination of the expansion force caused by overcharging protects not only property but also precious lives.

[0064] Although embodiments have been described as above, the present invention is not limited to the above embodiments and can be manufactured in various different forms, and a person skilled in the art to which the present invention belongs will understand that it can be implemented in other specific forms without changing the technical concept or essential features of the present invention.

[0065] Therefore, the embodiments described above should be understood as exemplary in all respects and not limiting. Explanation of the symbols

[0066] 100 : Portable shaft generator 110 : Body 120 : Handle 130 : Mounting part 133 : Plug 140 : Switching plate 150 : LED light source 200 : Secondary battery 210 : Outer cover 230 : Connector 300 : Cushion plate 310 : Cushioning material 330 : Support 350 : Adhesive layer 400 : Explosion-proof component 410 : Inner plate 430 : Outer plate 450 : Explosion-proof band 500 : Shock absorption hole 510 : Support beam 530 : Explosion control body 531 : Exhaust fin 533 : Pin head

Claims

Claim 1 A body having a handle for carrying on the upper part, a closed-circuit driving member for external power charging and outputting the charged power provided internally, a mounting part for a secondary battery charged by an external power source, and a plug for inducing power charging provided on the outer surface, a secondary battery that is charged by an external power source at the mounting part through a connector connected to the plug and discharged by the operation of the closed-circuit driving member, and an explosion-proof member that prevents the expansion and explosion of the secondary battery due to overcharging on the secondary battery and the mounting part, wherein the mounting part comprises a mounting hole sized to accommodate the secondary battery and an opening / closing plate that opens and closes the open front part of the mounting hole, wherein cushioning plates that absorb shock in the event of an explosion of the secondary battery are provided on each side of the mounting hole and the opening / closing plate, and the cushioning plates comprise a cushioning material that is adhered to each side of the mounting hole of the mounting part to form a shock-absorbing layer, and a support member that is adhered to the outer surface of the cushioning material and contacts the outer cover of the secondary battery. An explosion-proof device for a portable shaft generator, characterized in that the explosion-proof member comprises an inner plate covering the outer cover of the secondary battery, an outer plate overlapping the outer surface of the inner plate, and an explosion-proof band having a shock-absorbing layer installed between the inner plate and the outer plate. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 An explosion prevention device for a portable shaft generator according to claim 1, wherein the explosion-proof band is characterized in that the shock-absorbing layer formed between the inner plate and the outer plate has a cross-section of the explosion-proof band formed in a honeycomb structure. Claim 6 Explosion prevention of a portable shaft generator, comprising: a body having a handle for carrying on the upper part, a closed-circuit driving member internally configured for external power charging and output of the charged power, a mounting part for a secondary battery charged by an external power source, and a plug for inducing power charging on the outer surface; a secondary battery that is charged by an external power source at the mounting part through a connector connected to the plug and discharged by the operation of the closed-circuit driving member; an explosion-proof member that prevents expansion and explosion of the secondary battery due to overcharging in the secondary battery and the mounting part, and a shock-absorbing hole that controls the expansion of the outer cover of the secondary battery between the secondary battery and the explosion-proof member, wherein the shock-absorbing hole is composed of a support beam installed at the corner of the secondary battery and the explosion-proof member surrounding the outer cover of the secondary battery including the support beam, and wherein the support beam is installed at a predetermined height in an inclined direction at the corner of the secondary battery to tension the explosion-proof member. Device. Claim 7 delete Claim 8 delete Claim 9 An explosion prevention device for a portable shaft generator according to claim 6, wherein the shock absorption hole is further provided with an exhaust pin having a tip shaped like a tip, and a pin head formed to protrude toward the outer cover of the secondary battery and adhered to the inner surface of the explosion-proof member on the other side.

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