Small engine driven electric charging device

Abstract

The present invention relates to a small engine-driven electric charging device. The technical problem to be solved is to provide a small engine-driven electric charging device capable of charging the battery not only while the electric vehicle is driving but also while the electric vehicle is parked or stopped, by installing a separate small engine in the electric vehicle so that the small engine drives a main motor and the main motor drives a plurality of generators. To this end, the present invention comprises: a small engine having an displacement of 20cc to 200cc; a main motor including a motor rotating shaft coupled to the small engine and a motor spur gear coupled to the motor rotating shaft; and a motor rotational force transmission unit including a first driven spur gear meshed to the motor spur gear of the main motor, a driven shaft coupled through the first driven spur gear, and a plurality of second driven spur gears coupled to the driven shaft. A small engine-driven electric charging device is provided, comprising: a plurality of generator modules each coupled to a plurality of second driven spur gears provided in the motor rotational force transmission unit; wherein each of the plurality of generator modules includes a first generator including a first generator tooth gear connected to the second driven spur gear via a first chain and a first generator rotation shaft coupled to the first generator tooth gear, and a second generator including a second generator tooth gear connected to the first generator tooth gear via a second chain and a second generator rotation shaft coupled to the second generator tooth gear; and an electric vehicle battery pack electrically connected to and charged to the plurality of generator modules.

Description

Technology Field

[0001] The present invention relates to a small engine-driven electric charging device. Background Technology

[0002] Generally, an electric vehicle generates power to drive by supplying electrical energy to an electric motor through a high-voltage battery, and consists of an on-board charger (OBC), battery management system (BMS), battery, electric motor, and electric power control unit (EPCU).

[0003] A technology is known in which, through such a configuration, the generated voltage obtained via an alternator linked to the front and / or rear drive shafts is charged into a battery, and the charged battery is used to drive an electric motor. For example, a technology is known in which an alternator is connected to a front drive shaft driven by an electric motor via a drive belt, and the rotational force generated by the rotation of the front drive shaft is used to operate the alternator, thereby outputting a battery generated voltage to charge a rechargeable battery.

[0004] However, the above-mentioned conventional technology has a configuration in which an alternator is installed to be linked with the front-wheel drive shaft to charge the battery voltage, and the alternator is operated only by the driving of the drive shaft. Since battery charging is possible only when the electric vehicle is in motion, it is difficult to charge in accordance with the amount of charge of the battery, and there is a problem that overcharging can have an adverse effect on the battery life.

[0005] The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. The problem to be solved

[0006] The problem to be solved by the present invention is to provide a small engine-driven electric charging device capable of charging the battery not only while the electric vehicle is driving but also while the electric vehicle is parked or stopped, by installing a separate small engine in the electric vehicle so that the small engine drives the main motor and the main motor drives a plurality of generators. means of solving the problem

[0007] A small engine-driven electric charging device according to the present invention comprises: a small engine having an displacement of 20cc to 200cc; a main motor including a motor rotating shaft coupled to the small engine and a motor spur gear coupled to the motor rotating shaft; and a main motor including a motor spur gear coupled to the motor rotating shaft; and a motor rotational force transmission unit including a first driven spur gear meshed to the motor spur gear of the main motor, a driven shaft coupled through the first driven spur gear, and a plurality of second driven spur gears coupled to the driven shaft. A plurality of generator modules each coupled to a plurality of second driven spur gears provided in the motor rotational force transmission unit, wherein each of the plurality of generator modules comprises a first generator toothed gear connected to the second driven spur gear via a first chain, a first generator sub-toothed gear installed adjacent to the first generator toothed gear, and a first generator rotation shaft coupled through the first generator toothed gear and the first generator sub-toothed gear, a second generator toothed gear connected to the first generator sub-toothed gear via a second chain, a second generator sub-toothed gear installed adjacent to the second generator toothed gear, and a second generator rotation shaft coupled through the second generator toothed gear and the second generator sub-toothed gear, and may include a battery pack electrically connected to and charged by the plurality of generator modules.

[0008] In some examples, the plurality of generator modules each comprise a third generator including a third generator gear connected to the second generator sub-gear via a third chain, a third generator sub-gear installed adjacent to the third generator gear, and a third generator rotation axis coupled through the third generator gear and the third generator sub-gear; and a fourth generator including a fourth generator gear connected to the third generator sub-gear via a fourth chain, a fourth generator sub-gear installed adjacent to the fourth generator gear, and a fourth generator rotation axis coupled through the fourth generator gear and the fourth generator sub-gear. and may further include a fifth generator gear connected to the fourth generator sub-gear via a fifth chain, a fifth generator sub-gear installed adjacent to the fifth generator gear, and a fifth generator rotating shaft coupled through the fifth generator gear and the fifth generator sub-gear.

[0009] In some examples, the plurality of generator modules includes a first generator module positioned horizontally; and a second generator module positioned horizontally on the first generator module, wherein the first generator module is mechanically connected to the main motor and the second generator module may be mechanically connected to the first generator module.

[0010] In some examples, each of the first, second, third, fourth, and fifth generators comprises: a first generator unit having a first rotor having a permanent magnet coupled to the generator rotation shaft of each of the first, second, third, fourth, and fifth generators, and a first stator having a coil located outside the first rotor, wherein an alternating current voltage is output from the first stator; a second generator unit having an automatic voltage regulator that converts the alternating current voltage output from the first generator unit into a direct current voltage and outputs it, a second stator composed of an electromagnet that receives the direct current voltage output from the automatic voltage regulator, and a second rotor having a coil coupled to the generator rotation shaft located inside the second stator, wherein an alternating current voltage is output from the second rotor; and a first rectifier unit that rectifies the alternating current voltage output from the second generator unit into a direct current voltage and outputs it. The apparatus includes a third generator that outputs an alternating current voltage from the third stator, wherein the third rotor is an electromagnet that receives a direct current voltage output from the first rectifier and is coupled to the generator's rotating shaft, and the third stator includes a coil located around the third rotor. The output voltage of the third generator is sensed by the automatic voltage regulator of the second generator, and the automatic voltage regulator can regulate the direct current voltage provided to the second generator so that the output voltage of the third generator is maintained constant.

[0011] In some examples, the fire suppression device for suppressing a fire in the battery pack is further included, wherein the fire suppression device may include: a lifting plate installed on the upper side of the battery pack and capable of lifting; a drilling injection unit coupled to the lifting plate and drilling through the battery pack and spraying a fire extinguishing agent; a fire extinguishing agent supply unit connected to the drilling injection unit by a rotary swivel joint and piping to provide a fire extinguishing agent; and cylinder units installed on both sides of the lifting plate to lower the lifting plate toward the under body of the electric vehicle.

[0012] In some examples, the apparatus may further include: a temperature sensor for detecting the temperature of the battery pack; a smoke sensor for detecting smoke of the battery pack; a flame sensor for detecting a flame of the battery pack; a control unit for outputting a fire extinguishing control signal when at least one of the values ​​sensed from the temperature sensor, the smoke sensor, and the flame sensor is higher than a threshold value; a cylinder driving unit for operating the cylinder unit by the fire extinguishing control signal; a valve driving unit for opening the valve of the fire extinguishing agent supply unit by the fire extinguishing control signal; and a drill driving unit for operating the drilling injection unit by the fire extinguishing control signal. Effects of the invention

[0013] The present invention provides a small engine-driven electric charging device capable of charging the battery not only while the electric vehicle is driving but also while the electric vehicle is parked or stopped, by installing a separate small engine in the electric vehicle so that the small engine drives the main motor and the main motor drives a plurality of generators.

[0014] In addition, the present invention further includes a fire suppression device that sprays a fire extinguishing agent by directly penetrating the battery pack in the event of a fire in the battery pack, thereby enabling rapid suppression of a fire in an electric vehicle powered by a battery pack. Brief explanation of the drawing

[0015] FIG. 1 is a schematic diagram illustrating an exemplary small engine-driven electric charging device according to the present invention. FIG. 2 is a schematic diagram illustrating a generator connection configuration in an exemplary small engine-driven electric charging device according to the present invention. FIG. 3 is a schematic diagram illustrating the generator arrangement configuration of an exemplary small engine-driven electric charging device according to the present invention. FIG. 4 is a block diagram illustrating the configuration of an exemplary generator in an exemplary small engine-driven electric charging device according to the present invention. FIG. 5 is a side view illustrating an electric vehicle including an exemplary battery pack according to the present invention. FIGS. 6a to 6c are schematic diagrams illustrating the configuration and operation of a battery pack fire suppression device for an electric vehicle according to the present invention. Specific details for implementing the invention

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0017] The present inventions are provided to more fully explain the invention to those skilled in the art, and the following examples may be modified in various different forms, and the scope of the invention is not limited to the following examples. Rather, these examples are provided to make the disclosure more faithful and complete and to fully convey the spirit of the invention to those skilled in the art.

[0018] Additionally, in the drawings below, the thickness or size of each layer is exaggerated for convenience and clarity of explanation, and like reference numerals in the drawings refer to like elements. As used herein, the term "and / or" includes any one of the listed items and all combinations of one or more thereof. Furthermore, in this specification, the meaning of "connected" refers not only to cases where Member A and Member B are directly connected, but also to cases where Member C is interposed between Member A and Member B so that Member A and Member B are indirectly connected.

[0019] The terms used herein are for describing specific embodiments and are not intended to limit the invention. As used herein, the singular form may include the plural form unless the context clearly indicates otherwise. Additionally, as used herein, "comprise, include" and / or "comprising, including" specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and / or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and / or groups.

[0020] Although terms such as "first," "second," etc. are used in this specification to describe various components, parts, regions, layers, and / or parts, it is obvious that these components, parts, regions, layers, and / or parts should not be limited by these terms. These terms are used solely to distinguish one component, part, region, layer, or part from another region, layer, or part. Accordingly, the first component, part, region, layer, or part described below may refer to the second component, part, region, layer, or part without departing from the teachings of the present invention.

[0021] Spatial terms such as "beneath," "below," "lower," "above," and "upper" may be used to facilitate understanding of one element or feature depicted in the drawings and another element or feature. These spatial terms are intended to facilitate understanding of the invention according to various process or usage conditions of the invention and are not intended to limit the invention. For example, if an element or feature in the drawings is inverted, an element or feature described as "beneath" or "below" becomes "upper" or "on top." Therefore, "below" is a concept that encompasses "upper" or "below."

[0022] The battery pack installed in the electric vehicle according to the present invention can be charged by an external power source via an onboard charger (OBC) installed in the electric vehicle as well as by the small engine described below. In addition, the front-wheel drive shaft or the rear-wheel drive shaft of the electric vehicle may have its motor shaft connected or disconnected by the main motor and clutch described below.

[0024] FIG. 1 is a schematic diagram illustrating an exemplary small engine-driven electric charging device (100) according to the present invention, and FIG. 2 is a schematic diagram illustrating a generator connection configuration in an exemplary small engine-driven electric charging device (100) according to the present invention.

[0025] As illustrated in FIGS. 1 and 2, an exemplary small engine-driven electric charging device (100) according to the present invention may include a small engine (101), a main motor (110), a motor rotational force transmission unit (120), a plurality of generator modules (130) and a battery pack (140).

[0026] A small engine (101) can be installed at the front or rear of a vehicle and generally has a displacement of approximately 20cc to approximately 200cc. Although this small engine (101) does not have enough power to drive the vehicle, it can sufficiently charge the battery pack. In some examples, the small engine (101) may use gasoline as fuel, and additionally, diesel fuel or other mixed fuels may be used. Also, the small engine (101) has a lightweight and compact design, and while there are high-performance models, the present invention prefers models with excellent fuel efficiency and durability. Additionally, the small engine (101) is economical and allows for relatively simple maintenance, with regular oil changes and filter replacement being the main maintenance tasks. Although its lifespan depends on the frequency and method of use, the present invention guarantees a lifespan until the disposal of the electric vehicle. In addition, the small engine (101) has relatively less noise and vibration compared to the large engine, and thus can be designed to be more suitable for the electric vehicle according to the present invention. Furthermore, as environmentally friendly designs are recently being emphasized for the small engine (101), models equipped with technologies for reducing exhaust gas and noise may be preferred. There are various types and models of such small engines (101) depending on their size and use, and various options can be provided to be selected according to the needs of the present invention.

[0027] The main motor (110) is installed in the electric vehicle and may include a motor shaft (111) and a motor spur gear (112) coupled to the motor shaft (111). In some examples, the motor shaft (111) is coupled to the shaft of the small engine (101) via a belt, chain, or gearbox (reduction gear), so that the shaft (111) of the main motor (110) can rotate by the operation of the small engine (101). In some examples, the motor shaft (111) may be coupled to the front-wheel drive shaft and / or rear-wheel drive shaft, for example, via a clutch, to rotate the front-wheel and / or rear-wheel drive shafts. For example, the motor shaft (111) and the front-wheel drive shaft and / or rear-wheel drive shaft may be coupled or separated from each other by a clutch. In some examples, the clutch may be coupled or separated to the front-wheel drive shaft and / or rear-wheel drive shaft via a reduction gear. In some examples, the main motor (110) can be powered by a battery pack (140).

[0028] The motor rotational force transmission unit (120) may include a first driven spur gear (121), a driven shaft (122), and a plurality of second driven spur gears (123). The first driven spur gear (121) may be geared to the motor spur gear (112). In some examples, a reduction gear may be further coupled between the first driven spur gear (121) and the motor spur gear (112). The driven shaft (122) may be extended a certain length on both sides while being coupled through the first driven spur gear (121). A plurality of second driven spur gears (123) may be coupled through the driven shaft (122) and may be spaced apart from each other by a certain distance. Although the drawing shows four second driven spur gears (123) coupled to the driven shaft (122), there may be more or fewer.

[0029] Each of the multiple generator modules (130) can be coupled to each of the multiple second driven spur gears (123) provided in the motor rotational force transmission unit (120). Although the drawing shows four generator modules (130) coupled to the driven shaft (122), there may be more or fewer.

[0030] In some examples, a plurality of generator modules (130) may each include a first generator (131), a second generator (132), a third generator (133), a fourth generator (134), and a fifth generator (135), and the output terminals of each of these may be connected in parallel. Although five generators are shown in the drawing, there may be more or fewer.

[0031] In some examples, the first generator (131) may include a first generator gear (1317) connected to a second driven spur gear (123) via a first chain (1316) (or first belt), a first generator sub-gear (1318) installed adjacent to the first generator gear (1317), and a first generator shaft (1319) coupled through the first generator gear (1317) and the first generator sub-gear (1318).

[0032] In some examples, the second generator (132) may include a second generator gear (1327) connected to the first generator sub-gear (1318) via a second chain (1326) (or second belt), a second generator sub-gear (1328) installed adjacent to the second generator gear (1327), and a second generator shaft (1329) coupled through the second generator gear (1327) and the second generator sub-gear (1328).

[0033] In some examples, the third generator (133) may include a third generator gear (1337) connected to the second generator sub-gear (1328) via a third chain (1336) (or third belt), a third generator sub-gear (1338) installed adjacent to the third generator gear (1337), and a third generator shaft (1339) coupled through the third generator gear (1337) and the third generator sub-gear (1338).

[0034] In some examples, the fourth generator (134) may include a fourth generator gear (1347) connected to a third generator sub-gear (1338) via a fourth chain (1346) (or a fourth belt), a fourth generator sub-gear (1348) installed adjacent to the fourth generator gear (1347), and a fourth generator shaft (1349) coupled through the fourth generator gear (1347) and the fourth generator sub-gear (1348).

[0035] In some examples, the fifth generator (135) may include a fifth generator gear (1357) connected to a fourth generator sub-gear (1418) via a fifth chain (1356) (or fifth belt), a fifth generator sub-gear (1358) installed adjacent to the fifth generator gear (1357), and a fifth generator shaft (1359) coupled through the fifth generator gear (1357) and the fifth generator sub-gear (1358).

[0036] In some examples, these first to fifth generators (131 to 135) may be fixed on a generator fixing frame provided on the body of the vehicle.

[0037] The battery pack (140) can be electrically connected to a plurality of generator modules (130) to be charged. In some examples, the battery pack (140) may include a rechargeable cylindrical battery, a prismatic battery, or a pouch battery. In some examples, the battery pack (140) may include a nickel-cobalt-manganese (NCM) type battery, a lithium iron phosphate (LFP) type battery, or a solid-state battery. In some examples, the battery pack (140) may be arranged in a roughly rectangular shape at the bottom of the aforementioned generator modules (130). In some examples, the battery pack (140) may be arranged in a roughly rectangular shape at the bottom of the vehicle body of the electric vehicle.

[0039] FIG. 3 is a schematic diagram illustrating a generator arrangement configuration in an exemplary small engine-driven electric charging device (100) according to the present invention. As shown in FIG. 3, a plurality of generator modules (130) may include a first generator module (130A) and a second generator module (130B) positioned in a multilayer configuration. In some examples, the first generator module (130A) may be positioned horizontally and may be connected to the main motor (110) as described above. Additionally, the second generator module (130B) may be positioned horizontally on the first generator module (130A) and may include a structure similar or identical to that of the first generator module (130A). In some examples, the second generator module (130B) may also be mechanically connected to the main motor (110) or mechanically connected to the first generator module (130A).

[0041] FIG. 4 is a block diagram illustrating the configuration of an exemplary generator in an exemplary small engine-driven electric charging device (100) according to the present invention. The generator shown in FIG. 4 may be any one of the first, second, third, fourth, and fifth generators (131, 132, 133, 134, 135), and is described here using the first generator (131) as an example. As shown in FIG. 4, the first generator (131) may include a first generator section (1311), a second generator section (1312), a first rectifier section (1313), and a third generator section (1314). Here, the generator rotation (1319), through which the generator tooth gear (1317) and the generator sub-tooth gear (1318) are coupled, may be coupled through the first generator section (1311), the second generator section (1312), the first rectifier section (1313), and the third generator section (1314).

[0042] The first generator (1311) may include a first rotor (1311a) and a first stator (1311b). The first rotor (1311a) may include a permanent magnet directly coupled to the generator shaft (1319). The first stator (1311b) may include a coil spaced apart from the outside of the first rotor (1311a). Thus, the first rotor (1311a) (permanent magnet) exerts magnetic force on the first stator (1311b) (coil), inducing current in the first stator (1311b) according to Fleming's right-hand rule. Consequently, the first generator (1311) can output an alternating voltage from the first stator (1311b) as the generator shaft (1319) rotates.

[0043] The second generator (1312) may include an automatic voltage regulator (1312a), a second stator (1312b), and a second rotor (1312c). The automatic voltage regulator (1312a) may convert the alternating current voltage output from the first generator (1311) (first stator (1311b)) into a direct current voltage and output it. The second stator (1312b) may include an electromagnet (coil) that receives the direct current voltage output from the automatic voltage regulator (1312a). The second rotor (1312c) may include a coil directly coupled to a generator rotation shaft (1319) located inside the second stator (1312b). Accordingly, the second generator (1312) can output an alternating voltage by receiving magnetic force from the second rotor (1312c) as the generator rotation shaft (1319), that is, the second rotor (1312c), rotates.

[0044] The first rectifier (1313) can rectify the alternating current voltage output from the second generator (1312) (second rotor (1312c)) into a direct current voltage and output it to the third generator (1314).

[0045] The third generator (1314) may include a third rotor (1314a) and a third stator (1314b). The third rotor (1314a) may include an electromagnet (coil) that receives a DC voltage output from the first rectifier (1313), and this may be directly coupled to the generator rotation shaft (1319). The third stator (1314b) may include a coil positioned spaced apart from the third rotor (1314a). Accordingly, the third generator (1314) may output an AC voltage by applying magnetic force to the third stator (1314b) as the generator rotation shaft (1319), i.e., the third rotor (1314a), rotates. In this way, the AC voltage output from the third generator (1314) is input to the rectifier (1315). Power rectified through the rectifier (140) can be supplied to the battery pack (140).

[0046] In some examples, the output voltage of the third power generation unit (1314) is sensed by the automatic voltage regulator (1312a) of the second power generation unit (1312), and the automatic voltage regulator (1312a) can regulate the DC voltage provided to the second power generation unit (1312) so that the output voltage of the third power generation unit (1314) is maintained constant.

[0047] In this way, the present invention can provide a small engine-driven electric charging device in which a small engine and a plurality of generators are directly connected to the rotating shaft of the electric vehicle's drive motor, enabling battery charging not only during driving but also when the electric vehicle is stopped or parked.

[0048] In addition, the present invention can operate external electronic devices installed in homes or stores near electric vehicles by utilizing the voltage charged in the battery, and thus can also function as an energy storage device.

[0050] FIG. 5 is a side view illustrating an electric vehicle (100) including an exemplary battery pack (140) according to the present invention. The battery pack (140) may include a battery pack cover (311) which is part of the vehicle underbody (410) and a pack frame (312) positioned at the bottom of the vehicle underbody (410). The battery pack cover (311) and the pack frame (312) may be structures formed integrally with the vehicle floor portion (420). The vehicle underbody (410) separates the interior and exterior of the vehicle, and the pack frame (312) may be positioned on the exterior of the vehicle. Additionally, the electric vehicle (100) may be formed by combining additional parts, such as a hood (510) at the front of the vehicle and fenders (520) located at the front and rear of the vehicle, respectively, with the vehicle body. The electric vehicle (100) includes a battery pack (140) comprising a battery pack cover (311) and a pack frame (312), and the battery pack (140) can be coupled to a vehicle body part.

[0052] FIGS. 6a to 6c are schematic diagrams illustrating the configuration and operation of a battery pack fire suppression device (200) of an electric vehicle according to the present invention. Here, the battery pack fire suppression device (200) may be operated by an auxiliary battery different from the battery pack (140) described above. That is, since power may not be supplied from the battery pack (140) in the event of a fire in the battery pack (140), the battery pack fire suppression device (200) may be operated by receiving power from a separate auxiliary battery installed far away from the battery pack (140). This auxiliary battery may be charged from the battery pack (140) described above.

[0053] As illustrated in FIGS. 6a to 6c, the battery pack fire suppression device (200) may include a lifting plate (210), a drilling injection unit (220), a fire extinguishing agent supply unit (230), and a cylinder unit (240).

[0054] The lifting plate (210) is installed flatly on the upper side of the battery pack (140) and can be raised by the operation of the cylinder part (240). Before the fire of the battery pack (140), the lifting plate (210) is basically spaced a certain distance from the upper side of the battery pack (140).

[0055] The drilling injection unit (220) is coupled to the lifting plate (210) and can drill through the battery pack (140) and spray a fire extinguishing agent. The fire extinguishing agent is supplied from the fire extinguishing agent supply unit (230). The drilling injection unit (220) is basically similar to an electric drill structure, except that a fire extinguishing agent spray penetration hole (224) is formed in the drill (223). For example, an electric motor (221) is provided on one side of the drill (223), and the rotation axis of the electric motor (221) can be coupled to a drill gear provided in the drill (223) through a reduction gear (222, gearbox). Accordingly, when the electric motor (221) is driven, the drill (223) can rotate in a predetermined direction. As described above, a through hole (224) is formed in the drill (223) that penetrates the upper and lower sides, and a fire extinguishing agent can be sprayed directly through the battery pack (140) via this through hole (224). In some examples, a rotary swivel joint (225) may be coupled to the upper side of the drill (223) to supply the fire extinguishing agent to the through hole (224) of the drill (223) while remaining fixed despite the rotation of the drill (223). The swivel joint (225) is a mechanical device designed to deliver the fire extinguishing agent between a rotating part (drill (223)) and a fixed part (joint body) and simultaneously allow rotational movement of the drill (223). The rotary swivel joint (225) and the fire extinguishing agent supply unit (230) may be connected by a fire extinguishing pipe (227) that can be elastically bent. Unexplained reference numeral 226 in the drawing is a joint fixing part that fixes the swivel joint (225). In some examples, the fire extinguishing pipe (227) may be provided with a metal material that does not melt even at temperatures of approximately 1000°C or higher.

[0056] The fire extinguishing agent supply unit (230) can be connected to the drilling injection unit (220) via a rotary swivel joint (225) and piping (227) to provide a fire extinguishing agent at high pressure. To this end, the fire extinguishing agent supply unit (230) is provided in the form of a tank, and high-pressure gas and a fire extinguishing agent can be stored together inside the tank. In some examples, the fire extinguishing agent may include water, carbon dioxide, powder, foam, halon, or NOVEC. In particular, NOVEC is an advanced fire extinguishing agent developed by 3M, designed to quickly suppress fires while minimizing environmental impact.

[0057] The cylinder section (240) is installed on both sides of the lifting plate (210) to rapidly lower the lifting plate (210) toward the under body (410) of the electric vehicle. The cylinder may include a pneumatic cylinder, a hydraulic cylinder, or a power electric cylinder. By the operation of the cylinder section (240), the rotating drill (223) of the drilling injection section (220) can penetrate and bore through the battery pack (140).

[0058] In addition, the battery pack fire suppression device (200) may further include a temperature sensor (251) for detecting the temperature of the battery pack (140), a smoke sensor (252) for detecting smoke of the battery pack (140), a flame sensor (253) for detecting flames of the battery pack (140), a control unit (254) for outputting a fire suppression control signal when at least one of the values ​​sensed from the temperature sensor (251), the smoke sensor (252), and the flame sensor (253) is higher than a threshold value, a cylinder driving unit (255) for operating the cylinder unit (240) by the fire suppression control signal, a valve driving unit (256) for opening the valve (231) of the fire suppression agent supply unit (230) by the fire suppression control signal, and a drill driving unit (257) for operating the drilling injection unit (220) by the fire suppression control signal. Here, the cylinder drive unit (255), the valve drive unit (256), and the drill drive unit (257) may operate sequentially or simultaneously.

[0059] In this way, in the present invention, when the temperature detected from the battery pack (140) is higher than a preset threshold, or when the detected smoke or flame is higher than a threshold, the control unit (254) operates the cylinder drive unit (255) and the cylinder unit (240) to lower the lifting plate (210). In addition, the control unit (254) operates the drill drive unit (257) and the drilling injection unit (220) so that the drill (223) directly penetrates the battery pack (140). In addition, the control unit (254) operates the valve drive unit (256) so that the valve (231) of the fire extinguishing agent supply unit (230) opens, thereby allowing the fire extinguishing agent to be directly supplied to the penetrating battery pack (140), and accordingly, the fire in the battery pack (140) of the electric vehicle is quickly suppressed.

[0061] The above description is merely one embodiment for implementing an exemplary small engine-driven electric charging device according to the present invention. The present invention is not limited to the above-described embodiment, and the technical spirit of the present invention extends to the scope in which various modifications can be made by anyone with ordinary knowledge in the field to which the invention belongs, without departing from the gist of the invention as claimed in the following claims. Explanation of the symbols

[0062] 100; Exemplary small engine-driven electric charging device according to the present invention 101; small engine 110; Main motor 111; Motor rotating shaft 112; Motor spur gear 120; Motor rotational force transmission unit 121; First driven spur gear 122; Driven shaft 123; Second driven spur gear 130; Generator module 131 to 135; 1st to 5th generators 1316; 1st chain 1317; 1st generator gear 1318; 1st generator sub-cog gear 1319; 1st generator shaft 140; battery pack 200; Battery pack fire suppression device 210; Lifting plate 220; Drilling injection unit 221; Electric motor 222; Gearbox 223; Drill 224; through hole 225; swivel joint 226; Joint fixing part 227; Piping 230; Fire extinguishing agent supply unit 231; Valve 240; Cylinder part 251; Temperature sensor 252; Smoke sensor 253; Flame sensor 254; Control unit 255; Cylinder drive unit 256; Valve actuator 257; Drill actuator

Claims

Claim 1 A small engine having a displacement of 20cc to 200cc; a main motor comprising a motor rotating shaft coupled to the small engine and a motor spur gear coupled to the motor rotating shaft; a motor rotational power transmission unit comprising a first driven spur gear meshed to the motor spur gear of the main motor, a driven shaft coupled through the first driven spur gear, and a plurality of second driven spur gears coupled to the driven shaft; and a plurality of generator modules each coupled to a plurality of second driven spur gears provided in the motor rotational power transmission unit, wherein the plurality of generator modules each comprise a first generator toothed gear connected to the second driven spur gear via a first chain, a first generator sub-toothed gear installed adjacent to the first generator toothed gear, and a first generator rotating shaft coupled through the first generator toothed gear and the first generator sub-toothed gear, a second generator toothed gear connected to the first generator sub-toothed gear via a second chain, and a second generator sub-toothed gear installed adjacent to the second generator toothed gear. A second generator comprising a gear, and a second generator rotating shaft that is coupled through the second generator gear and the second generator sub-gear; a battery pack electrically connected to and charged by the plurality of generator modules; and a fire suppression device for suppressing a fire in the battery pack, wherein the fire suppression device comprises: a lifting plate installed on the upper side of the battery pack and capable of lifting; a drilling injection unit coupled to the lifting plate that drills through the battery pack and sprays a fire extinguishing agent; and a fire extinguishing agent supply unit that supplies a fire extinguishing agent to the drilling injection unit.A small engine-driven electric charging device comprising: a cylinder portion installed on both sides of the lifting plate to lower the lifting plate toward the under body of the electric vehicle; a drilling injection portion comprising a rotatable drill; and a rotary swivel joint coupled to the drill, which is provided on the upper side of the drill to deliver a fire extinguishing agent supplied from the fire extinguishing agent supply portion into the drill while remaining in a fixed state despite the rotation of the drill. Claim 2 In claim 1, the plurality of generator modules each comprise: a third generator including a third generator gear connected to the second generator sub-gear via a third chain, a third generator sub-gear installed adjacent to the third generator gear, and a third generator rotation axis coupled through the third generator gear and the third generator sub-gear; and a fourth generator including a fourth generator gear connected to the third generator sub-gear via a fourth chain, a fourth generator sub-gear installed adjacent to the fourth generator gear, and a fourth generator rotation axis coupled through the fourth generator gear and the fourth generator sub-gear. A small engine-driven electric charging device further comprising a fifth generator including a fifth generator gear connected to the fourth generator sub-gear via a fifth chain, a fifth generator sub-gear installed adjacent to the fifth generator gear, and a fifth generator rotating shaft coupled through the fifth generator gear and the fifth generator sub-gear. Claim 3 A small engine-driven electric charging device according to claim 2, wherein the plurality of generator modules comprises a first generator module positioned horizontally; and a second generator module positioned horizontally on the first generator module, wherein the first generator module is mechanically connected to the main motor and the second generator module is mechanically connected to the first generator module. Claim 4 In claim 3, each of the first, second, third, fourth, and fifth generators comprises: a first generator unit having a first rotor having a permanent magnet coupled to the generator rotation shaft of each of the first, second, third, fourth, and fifth generators, and a first stator having a coil located on the outer side of the first rotor, wherein an alternating current voltage is output from the first stator; a second generator unit having an automatic voltage regulator that converts the alternating current voltage output from the first generator unit into a direct current voltage and outputs it, a second stator composed of an electromagnet that receives the direct current voltage output from the automatic voltage regulator, and a second rotor having a coil coupled to the generator rotation shaft located on the inner side of the second stator, wherein an alternating current voltage is output from the second rotor; and a first rectifier unit that rectifies the alternating current voltage output from the second generator unit into a direct current voltage and outputs it. A small engine-driven electric charging device comprising a third generator that outputs an alternating current voltage from the third stator, wherein the third rotor, which is an electromagnet and is coupled to the generator's rotating shaft, and the third stator, which includes a coil located around the third rotor, receive a direct current voltage output from the first rectifier and output a direct current voltage output from the third generator, and the output voltage of the third generator is sensed by the automatic voltage regulator of the second generator, and the automatic voltage regulator regulates the direct current voltage provided to the second generator so that the output voltage of the third generator is maintained constant. Claim 5 delete Claim 6 A small engine-driven electric charging device according to claim 1, further comprising: a temperature sensor for detecting the temperature of the battery pack; a smoke sensor for detecting smoke of the battery pack; a flame sensor for detecting a flame of the battery pack; a control unit for outputting a fire suppression control signal when at least one of the values ​​sensed from the temperature sensor, the smoke sensor, and the flame sensor is higher than a threshold value; a cylinder driving unit for operating the cylinder unit by the fire suppression control signal; a valve driving unit for opening the valve of the fire suppression agent supply unit by the fire suppression control signal; and a drill driving unit for operating the drilling injection unit by the fire suppression control signal.

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