CN218919036U - Battery device for reducing operating temperature - Google Patents

Abstract

The utility model relates to a battery device for reducing working temperature, which comprises a shell, a battery module, a fan device, an inner connecting pipe and an outer connecting pipe. The shell comprises an accommodating space for accommodating the battery module, the fan device and the inner and outer connecting pipes, and at least one interval space is formed between the battery module and the shell. The outer connecting pipe is arranged outside the inner connecting pipe, and an air guide channel is formed between the outer connecting pipe and the inner connecting pipe. One end of the connecting tube faces the driving part of the fan device, and the other end is connected with the battery module. One end of the air guide channel faces to the blade part of the fan device, and the other end is connected with the spacing space. The cooling air flow generated by the fan device is conveyed to the interval space through the air guide channel and takes away heat generated by the battery module so as to reduce the temperature of the battery equipment.

Description

Battery device for reducing operating temperature

Technical Field

The present utility model relates to a battery device for reducing an operating temperature, which is advantageous in delivering outside air into the battery device and reducing the temperature of the battery device.

Background

The secondary battery mainly comprises a nickel-hydrogen battery, a nickel-cadmium battery, a lithium ion battery and a lithium polymer battery, and the lithium battery has the advantages of high energy density, high operation voltage, large use temperature range, no memory effect, long service life, capability of being charged and discharged for many times and the like, and is widely used in portable electronic products such as mobile phones, notebook computers, digital cameras and the like, and has been more expanded in the field of automobiles in recent years.

The Cell structure mainly comprises a positive electrode material, an electrolyte, a negative electrode material, an isolating layer and a shell, wherein the isolating film separates the positive electrode material from the negative electrode material to avoid short circuit, and the electrolyte is arranged in the porous isolating film and is used for conducting ionic charges. The casing is used for coating the positive electrode material, the separator, the electrolyte and the negative electrode material, and is generally made of a metal material.

The optimal operating temperature of the lithium battery is about 15 c to 35 c, and too low or too high an operating temperature may affect the normal use of the lithium battery. Specifically, when the temperature is too low, the internal resistance of the lithium battery increases and the discharging capability is reduced, and when the temperature is severe, the voltage generated by the lithium battery is more likely to be incapable of driving the electronic device or the automobile. When the temperature is too high, thermal runaway (Thermal runaway) of the lithium battery may occur, thereby generating flame and emitting high-heat combustible substances. When flame and high heat combustible materials are sprayed outside the battery, the electronic device or automobile connected with the battery is more likely to be burned or exploded.

Therefore, how to improve the heat dissipation efficiency of the battery device and to prevent the thermal runaway battery from being burned to the outside is a primary course of battery manufacturers.

Disclosure of Invention

An object of the present utility model is to provide a battery device for reducing an operating temperature, which is mainly connected to a battery module and a fan device through an inner connection pipe and an outer connection pipe, wherein the outer connection pipe is sleeved outside the inner connection pipe, and an air guide channel is formed between the inner connection pipe and the outer connection pipe. The air flow generated by the fan device can be guided to the interval space between the battery module and the shell through the air guide channel, the air flow passing through the interval space can be contacted with the battery module, and heat of the battery module is taken away, so that the temperature of the battery module is reduced.

When thermal runaway occurs in the battery cells in the battery module, flames or high-heat combustible substances generated from the thermal runaway battery cells are transferred to the driving part of the fan device through the isolation channels inside the inner connection pipe. The driving part of the fan device can be used for blocking flame or high-heat combustible substances, so that the probability of outward burning of the flame or the high-heat combustible substances is reduced, and the safety in use is greatly improved.

To achieve the above object, the present utility model provides a battery device for reducing an operating temperature, comprising: the shell comprises an accommodating space; the battery module comprises a plurality of battery cells, wherein the battery module is positioned in the accommodating space of the shell, and a spacing space exists between the shell and the battery module; the fan device is positioned in the accommodating space of the shell and comprises a driving part and a fan blade part, wherein the driving part is used for driving the fan blade part to rotate; the internal connecting pipe comprises a first opening and a second opening, wherein the first opening faces the driving part of the fan device, and the second opening is connected with the battery module; and the outer connecting pipe comprises a third opening and a fourth opening, wherein the third opening faces the fan device, the fourth opening faces the battery module, the outer connecting pipe is arranged at the outer side of the inner connecting pipe, an air guide channel is formed between the inner connecting pipe and the outer connecting pipe, one end of the air guide channel faces the blade part of the fan device, the other end of the air guide channel is connected with the spacing space, the sectional area of the second opening of the inner connecting pipe is larger than that of the first opening, and the sectional area of the fourth opening of the outer connecting pipe is larger than that of the third opening.

Further, the battery device also comprises a fireproof filter layer positioned on the air inlet side of the fan device.

Further, the battery device further comprises a sealing unit for arranging the fan device and the fireproof filter layer on the shell, the fireproof filter layer is arranged between the fan device and the shell, and the sealing unit is used for preventing gas in the accommodating space of the shell from flowing back to the outside of the shell.

Preferably, the inner side of the inner connection pipe is provided with an isolation passage, one end of the isolation passage faces the driving part of the fan device, and the other end of the isolation passage is connected with the battery module.

Further, the battery device further comprises at least one bag body positioned in the isolation channel of the inner connecting pipe, and water or non-flammable phase change material is placed in the bag body.

Preferably, the inner connecting pipe is provided with at least one connecting hole, and the isolation channel of the inner connecting pipe is connected with the spacing space or the air guide channel through the connecting hole.

Preferably, the first opening of the inner connection tube and the third opening of the outer connection tube are circular, and the second opening of the inner connection tube and the fourth opening of the outer connection tube are square.

Preferably, the cross section of the air guiding channel is annular, the cross section of the air guiding channel towards the fan device is annular, and the cross section of the air guiding channel towards the compartment is square annular.

Further, the battery device further comprises a plurality of guide plates for connecting the inner connecting pipe and the outer connecting pipe, wherein the guide plates are positioned in the air guide channels and divide the air guide channels into a plurality of secondary air guide channels.

Further, the battery device further comprises at least one bag body positioned in a setting space among the outer connecting pipe, the shell and the fan device, and water or nonflammable phase change materials are placed in the bag body.

Preferably, the outer connecting pipe is provided with at least one connecting hole, and the connecting hole is connected with the arrangement space and the interval space among the outer connecting pipe, the shell and the fan device.

Preferably, the fan device comprises a fixing frame, the fan part is connected with the fixing frame through the driving part, the inner side of the connecting pipe is provided with an isolation channel, one end of the isolation channel is connected with the fixing frame of the fan device, and the other end of the isolation channel is connected with the battery module.

Drawings

Fig. 1 is a side perspective view of an embodiment of a battery device for reducing operating temperature of the present utility model.

Fig. 2 is a top perspective view of an embodiment of a battery device for reducing operating temperature of the present utility model.

Fig. 3 is a schematic configuration view of an embodiment of a fan apparatus for a battery device for reducing an operating temperature of the present utility model.

Fig. 4 is an exploded perspective view showing an embodiment of the outer connection pipe and the inner connection pipe of the battery device for reducing the operating temperature according to the present utility model.

Fig. 5 is a perspective view showing an embodiment of the outer connection pipe and the inner connection pipe of the battery device for reducing the operating temperature according to the present utility model.

Fig. 6 is a partially enlarged side perspective view of still another embodiment of a battery apparatus for reducing an operating temperature of the present utility model.

Fig. 7 is a side perspective view of yet another embodiment of a battery apparatus for reducing operating temperature of the present utility model.

Fig. 8 is an exploded perspective view showing still another embodiment of the external connection pipe and the internal connection pipe of the battery device for reducing the operating temperature according to the present utility model.

Reference numerals illustrate: 10-battery device; 11-a battery module; 111-battery cells; 12-cooling the air flow; 13-a fan device; 131-a driving part; 132-hollowed-out parts; 133-a rotating part; 134-air inlet side; 135-fixing frame; 1351-a frame; 1353—a setting section; 1355-connecting a stent; 136-air outlet side; 137-fan blade section; 14, a bag body; 15-a housing; 151-perforating; 152-accommodating space; 154-space; 156-set space; 171-connecting tubes; 1711-a first opening; 1713-a second opening; 1715-attachment holes; 172-an air guide channel; 1721-secondary air guide channels; 173-an outer connection tube; 1731-third opening; 1733-fourth openings; 1735-attachment holes; 174-isolating the channel; 175-deflector; 191-a fireproof filter layer; 193-sealing unit.

Detailed Description

Referring to fig. 1 and 2, there are side and top perspective views, respectively, of an embodiment of a battery apparatus for reducing operating temperature according to the present utility model. The battery device 10 mainly includes a battery module 11, a fan device 13, a housing 15, an inner connecting tube 171 and an outer connecting tube 173, wherein the housing 15 includes a receiving space 152 for receiving the battery module 11, the fan device 13, the inner connecting tube 171 and the outer connecting tube 173.

The battery module 11 includes a plurality of battery cells 111, wherein the plurality of battery cells 111 are connected in series and/or in parallel via conductive plates, so that the battery module 11 can generate a predetermined voltage. Further, a fixing mechanism is generally provided outside the battery cells 111 for fixing the positions of the respective battery cells 111.

The fan device 13 is connected to the housing 15, and includes a driving portion 131 and a rotating portion 133, wherein the driving portion 131 is used for connecting and driving the rotating portion 133 to rotate. The radially outer side of the rotating portion 133 is provided with a fan blade portion 137, and when the rotating portion 133 rotates, the fan blade portion 137 drives surrounding air to convect, and generates the cooling air flow 12.

Specifically, the driving portion 131 of the fan device 13 may include a motor, a coil, a bearing, and the like, and the rotating portion 133 may include a magnet, a connecting shaft, and a fan blade portion 137, wherein the connecting shaft of the rotating portion 133 is connected to the driving portion 131 via the bearing. When a current is supplied to the coil, the rotating portion 133 and the fan blade portion 137 rotate with respect to the driving portion 131. In practice, only the rotating blade portion 137 will drive the air flow and generate the cooling air flow 12, and the driving portion 131 will not generate the cooling air flow 12 in principle.

Referring to fig. 3, the fan apparatus 13 generally further includes a fixing frame 135, wherein the fixing frame 135 includes a frame 1351, at least one connecting bracket 1355, and a setting portion 1353. The installation part 1353 is located inside the frame 1351, and the frame 1351 and the installation part 1353 are connected by a connection bracket 1355. The driving portion 131 of the fan device 13 is disposed on the setting portion 1353 of the fixing frame 135, and the rotating portion 133 and the fan blade portion 137 can rotate relative to the fixing frame 135, and output the cooling air flow 12 through the hollow portion 132 of the fixing frame 135.

As shown in fig. 1, two sides of the fan device 13 are respectively defined as an air inlet side 134 and an air outlet side 136, and when the fan blade portion 137 rotates, air is driven to flow from the air inlet side 134 to the air outlet side 136. Generally, the mounting portion 1353 and the connection bracket 1355 of the fixing frame 135 are usually disposed on the air outlet side 136 of the fan apparatus 13.

Referring to fig. 4, the inner connecting tube 171 includes a first opening 1711 and a second opening 1713, wherein the cross-sectional area of the second opening 1713 is larger than that of the first opening 1711, such that the inner connecting tube 171 has an appearance similar to a funnel or a horn. For example, the first opening 1711 may be circular and the second opening 1713 may be square.

The outer connection tube 173 includes a third opening 1731 and a fourth opening 1733, wherein the cross-sectional area of the fourth opening 1733 may be larger than that of the third opening 1731, such that the outer connection tube 173 has an approximately funnel-shaped or trumpet-shaped appearance. For example, the third opening 1731 may be circular and the fourth opening 1733 may be square.

In practical applications, the shapes of the first opening 1711, the second opening 1713, the third opening 1731 and the fourth opening 1733 can be adjusted according to the shapes of the driving portion 131, the rotating portion 133, the blade portion 137, the housing 15 and/or the battery module 11 of the fan device 13. The first opening 1711 and the third opening 1731 are circular, and the second opening 1713 and the fourth opening 1733 are square, which is only an embodiment of the present utility model and is not a limitation of the claims.

Referring to fig. 5, the inner connecting tube 171 is similar to the outer connecting tube 173 in shape, wherein the outer connecting tube 173 is larger in volume than the inner connecting tube 171. The outer connection pipe 173 may be disposed or sleeved outside the inner connection pipe 171, wherein the first opening 1711 of the inner connection pipe 171 and the third opening 1731 of the outer connection pipe 173 are located at the same side, and the second opening 1713 of the inner connection pipe 171 and the fourth opening 1733 of the outer connection pipe 173 are located at the same side.

An air guide passage 172 is formed between the inner connection tube 171 and the outer connection tube 173, and a space inside the inner connection tube 171 may be defined as an isolation passage 174. For example, the air guide passage 172 is located between the outer surface of the inner connection tube 171 and the inner surface of the outer connection tube 173, and the isolation passage 174 is located inside the inner surface of the inner connection tube 171.

In an embodiment of the present utility model, the cross section of the air guiding channel 172 is annular, wherein the cross section of the air guiding channel 172 facing the fan device 13 is annular, and the cross section of the air guiding channel 172 facing the space 154 is square annular. One end of the air guide passage 172 is connected to the blade portion 137 of the fan unit 13, and the other end is connected to the space 154.

In another embodiment of the present utility model, as shown in fig. 5, at least one baffle 175 may be disposed between the inner connection pipe 171 and the outer connection pipe 173, wherein the baffle 175 connects the outer surface of the inner connection pipe 171 and the inner surface of the outer connection pipe 173. The deflector 175 is located inside the air guiding channel 172 and divides the air guiding channel 172 into a plurality of sub-air guiding channels 1721. In practical application, the inclination angle of the deflector 175 can be adjusted according to the angle of the blade portion 137 of the fan device 13, so as to facilitate guiding the cooling air flow 12 generated by the blade portion 137. The baffle 175 is only one embodiment of the present utility model, and is not limited by the claims, and in various embodiments, the baffle 175 may not be disposed between the inner connecting tube 171 and the outer connecting tube 173.

The inner connecting tube 171, the outer connecting tube 173 and the deflector 175 may be made of metal or plastic, for example, a metal plate may be bent and welded to form the inner connecting tube 171, the outer connecting tube 173 and the deflector 175 made of metal, or the inner connecting tube 171, the outer connecting tube 173 and the deflector 175 made of plastic may be manufactured by injection molding.

As shown in fig. 1 and 3, the first opening 1711 of the inner connecting tube 171 faces the driving portion 131 of the fan device 13, for example, the first opening 1711 of the inner connecting tube 171 may be connected to the driving portion 131 of the fan device 13 or the setting portion 1353 of the fixing frame 135 by welding or bonding, so that the driving portion 131 of the fan device 13 and/or the setting portion 1353 of the fixing frame 135 are located inside the first opening 1711 of the inner connecting tube 171 and face or connect to the isolation channel 174.

The second opening 1713 of the inner connecting tube 171 faces the battery module 11, and for example, the second opening 1713 may be connected or covered with one end of the battery module 11 by welding or bonding such that one end of the battery module 11 faces or is connected with the isolation channel 174.

The third opening 1731 of the outer connection tube 173 faces the fan apparatus 13, for example, the third opening 1731 of the outer connection tube 173 may be connected to or cover the frame 1351 of the fixing frame 135 by welding or bonding, such that the blade portion 137 of the fan apparatus 13 faces the air guiding channel 172. The fourth opening 1733 of the outer connection pipe 173 is connected to the inner surface of the case 15 toward the battery module 11, for example, by welding or bonding.

As shown in fig. 1 and 2, a space 154 is formed between the battery module 11 and the housing 15, for example, the appearance of the battery module 11 may be rectangular parallelepiped, and the accommodating space 152 formed on the inner surface of the housing 15 is also rectangular parallelepiped. Six spacing spaces 154 may be formed between the inner surface of the case 15 and six faces of the battery module 11, wherein four spacing spaces 154 between four adjacent faces of the battery module 11 and the inner surface of the case 15 connect the air guide channels 172. The opposite surfaces of the case 15 face the other two opposite surfaces of the battery module 11, respectively, and a plurality of through holes 151 are provided in the opposite surfaces of the case 15.

When the driving portion 131 of the fan device 13 drives the fan blade portion 137 to rotate, the fan blade portion 137 will convey the external air to the air guiding channel 172 through the through hole 151 on the housing 15, and convey the air to the space 154 through the air guiding channel 172, so as to form the cooling air flow 12 in the air guiding channel 172 and the space 154, and a part of the cooling air flow 12 may flow from the space 154 to between the battery cells 111 of the battery module 11. The cooling air flow 12 takes heat away when contacting the battery module 11 and the battery cells 111, and lowers the temperature of the battery module 11 and the battery cells 111.

As shown in fig. 1, the sectional areas of the space 154 above and below the battery module 11 may vary depending on the structural design. As shown in fig. 2, the sectional areas of the space 154 located at the left and right sides of the battery module 11 may also vary depending on the structural design.

The positions and areas of the second opening 1713 of the inner connection pipe 171 and the fourth opening 1733 of the outer connection pipe 173 are adjusted in accordance with the sizes of the space 154 of the upper, lower, left and right regions and the sizes and positions of the battery modules 11. In the present utility model, the upper and lower air guiding channels 172 are not symmetrical as shown in the side view of fig. 1, but the air guiding channels 172 on both sides are symmetrical as shown in the top view of fig. 2. In different embodiments, the cross-sectional areas of the spaces 154 above, below, left and right of the battery module 11 may be the same, and the air guiding channels 172 above, below, left and right may be symmetrical.

In another embodiment of the present utility model, the spacing spaces 154 above, below, left and right of the battery module 11 may be asymmetric. Specifically, the inner connection pipe 171 and the outer connection pipe 173 of the present utility model are particularly suitable for the asymmetric construction of the upper, lower, left and right spaced spaces 154 of the battery module 11, and facilitate the guiding of the cooling air flow 12 to the asymmetric spaced spaces 154. Of course, the upper, lower, left and right spacing spaces 154 of the battery module 11 are of an asymmetric configuration, and are not limiting to the claims of the present utility model.

By arranging the inner connecting pipe 171 and the outer connecting pipe 173, turbulence and vortex generated when the cooling air flow 12 flows in the air guide channel 172, the accommodating space 152 and the spacing space 154 of the housing 15 can be reduced, and the flow efficiency and the cooling efficiency of the cooling air flow 12 can be improved.

When the inner connection pipe 171 and the outer connection pipe 173 are not provided, the cooling air flow 12 generated by the fan device 13 is directly blown to the surface and the corners of the battery module 11, and turbulence and swirl are formed, which greatly reduces the flow efficiency and cooling efficiency of the cooling air flow 12. Therefore, compared with the prior art, the battery device 10 of the present utility model can substantially improve the heat dissipation efficiency of the battery module 11 and effectively reduce the temperature of the battery module 11.

In addition, when thermal runaway occurs in the battery cells 111 in the battery module 11, a large portion of the highly hot combustible substances and flames ejected from the battery cells 111 enter the isolation passage 174 through the second opening 1713 of the inner connection tube 171. However, since the first opening 1711 of the inner connecting tube 171 is directly connected to the driving portion 131 of the fan device 13, the driving portion 131 of the fan device 13 and the setting portion 1353 of the fixing frame 135 can block the high-heat combustible material and flame, so as to reduce the high-heat combustible material and flame generated by thermal runaway from being transferred to the outside of the housing 15, and greatly reduce the delay of burning the battery core 111 to the outside of the housing 15 when thermal runaway occurs.

In an embodiment of the present utility model, a fireproof filter layer 191 may be further disposed on the air intake side 134 of the fan apparatus 13, wherein the fireproof filter layer 191 is located between the perforation 151 of the housing 15 and the fan apparatus 13, and is configured to cover the perforation 151 of the housing 15.

In an embodiment of the present utility model, the fireproof filter layer 191 may be a foam metal, and when the driving portion 131 of the fan device 13 drives the rotating portion 133 to rotate, air outside the housing 15 enters the air guiding channel 172 and the space 154 through the through hole 151 and the fireproof filter layer 191. In another embodiment of the present utility model, as shown in fig. 6, the fireproof filter layer 191 may be a multi-layer wind shielding structure, and a tortuous wind guiding path is formed by a multi-layer structure, so that the contact area between the fireproof filter layer 191 and the high-heat combustible material and flame can be increased.

The fireproof filter layer 191 may serve to block or adsorb high-heat combustible substances and flames generated when thermal runaway, may further prevent the thermal runaway battery cells 111 from being burned to the electronic devices outside the case 15, and may improve the safety of the battery apparatus 10 in use.

In an embodiment of the present utility model, the fireproof filter layer 191 and the fan device 13 may be sequentially stacked on the housing 15, and the fireproof filter layer 191 and the fan device 13 are fixed on the housing 15 by the sealing unit 193, wherein the fireproof filter layer 191 is located between the fan device 13 and the housing 15, and for example, the sealing unit 193 may be a sealant or a fixing frame provided with a sealing strip. By providing the sealing unit 193, the gas in the accommodating space 152 of the housing 15 is prevented from flowing back to the outside of the housing 15

Referring to fig. 7 and 8, there are side perspective views of another embodiment of the battery apparatus for reducing an operating temperature according to the present utility model and perspective views of another embodiment of the external connection pipe and the internal connection pipe thereof, respectively. The embodiment of fig. 6 and 7 is similar to that of fig. 1 and 5, respectively, the main difference is that the outer connecting tube 173 of fig. 6 and 7 is provided with a connecting hole 1735, and at least one bag 14 is disposed in the space 156 between the outer connecting tube 173, the fan device 13 and the housing 15, wherein the bag 14 in the space 156 can be closely attached to or partially protrude from the connecting hole 1735 of the outer connecting tube 173.

In one embodiment of the present utility model, the bag 14 may be made of aluminum foil or plastic, and water or non-flammable phase change material is placed in the bag 14. The interior space of the pouch 14 may be greater than the volume of the non-flammable phase change material. When thermal runaway occurs in the battery cells 111 in the battery module 11 such that the temperature of the pouch 14 is close to or slightly higher than 100 ℃, the pouch 14 naturally expands.

The inflated bag 14 will enter the air flow channel 172 through the connection hole 1735 and partially block the air flow channel 172. At this time, the convection between the accommodating space 152 inside the housing 15 and the external atmosphere is limited, and the oxygen in the atmosphere is reduced to be transported into the accommodating space 152, so that the combustible material ejected from the thermal runaway battery cell 11 is lack of oxygen, and the combustion rate is further reduced, so as to reduce the heat release rate (Heat Release Rate) caused by the thermal runaway. In practical experiments, the average temperature near the air inlet and the air outlet is maintained at about 120-200 ℃ approximately due to severe heat exchange with the outside of the system. At this time, the bag 14 may not burst, and in the event that the bag 14 does not burst, the rate of heat release within the housing 15 may be limited.

When the temperature in the vicinity of the bag 14 exceeds 200 c, water inside the bag 14 will largely overflow. The overflowed water will directly gasify to water vapor due to the high temperature of the environment. During the phase change, each gram of water will absorb 2.2K joules of heat and will therefore cool down dramatically. The concentration of the combustible gas is also directly diluted by the formed water vapor. Under the dual effects of severe cooling and reduced combustible gas concentration, the chance of sustained combustion is further reduced. The pressure and heat resistance of the bag 14 can be adjusted rather than a specific value. The temperature and pressure settings in the above-described process are only set according to the current experimental results, and are not limited by the claims of the present utility model, and the actual tolerance of the bag 14 should be according to the system requirements.

In an embodiment of the present utility model, the connection hole 1735 may be provided on the outer connection pipe 173, or between the outer connection pipe 173 and the inner surface of the housing 15, wherein the connection hole 1735 connects the disposition space 156, the air guide passage 172 and/or the interval space 154. Further, the bag 14 may be constructed in a sheet shape, and the folded bag 14 is placed in the installation space 156 between the outer connection pipe 173, the fan unit 13, and the housing 15. When the temperature of the liquid in the bag 14 increases, the folded bag 14 may expand and open such that a portion of the bag 14 enters the air guide channel 172 and/or the space 154 through the connection hole 1735 of the outer connection tube 173. In different embodiments, when the bag 14 is disposed in the disposition space 156 between the outer connection pipe 173, the fan device 13 and the housing 15, the bag 14 may be made to abut against the connection hole 1735 of the outer connection pipe 173, or a portion of the bag 14 may be made to enter into the air guiding channel 172 and/or the spacing space 154 via the connection hole 1735 of the outer connection pipe 173.

Referring to fig. 1 and 7, in another embodiment of the present utility model, the bag 14 may also be disposed in the isolation channel 174 of the inner connecting tube 171, and at least one connecting hole 1715 is disposed on the inner connecting tube 171, wherein the isolation channel 174 of the inner connecting tube 171 is connected to the air guiding channel 172 and/or the spacing space 154 via the connecting hole 1715. The bag 14 can be attached to the connecting hole 1715 of the inner connecting tube 171, when the temperature of the bag 14 is close to or slightly higher than 100 ℃, the bag 14 will naturally expand, so that part of the bag 14 enters the air flow channel 172 or the interval space 154, and oxygen in the atmosphere is reduced to be delivered into the housing 15. When the temperature of the pouch body 14 exceeds 200 c, water inside the pouch body 14 overflows greatly, and the temperature of the battery module 11 can be greatly reduced.

In practical applications, at least one bag 14 may be disposed in the isolation passage 174 of the inner connection tube 171 and the space 156 between the outer connection tube 173, the fan device 13, and the housing 15, or the bag 14 may be disposed in one of the isolation passage 174 and the space 156.

The foregoing description is only one embodiment of the present utility model and is not intended to limit the scope of the utility model, i.e., the equivalents and modifications of the shape, construction, characteristics and spirit of the utility model as defined in the claims should be construed as being included in the scope of the utility model as claimed.

Claims (12)

1. A battery apparatus for reducing an operating temperature, comprising:

the shell comprises an accommodating space;

the battery module comprises a plurality of battery cells, wherein the battery module is positioned in the accommodating space of the shell, and a spacing space exists between the shell and the battery module;

the fan device is positioned in the accommodating space of the shell and comprises a driving part and a fan blade part, wherein the driving part is used for driving the fan blade part to rotate;

the internal connecting pipe comprises a first opening and a second opening, wherein the first opening faces the driving part of the fan device, and the second opening is connected with the battery module; a kind of electronic device with high-pressure air-conditioning system

The outer connecting pipe comprises a third opening and a fourth opening, wherein the third opening faces the fan device, the fourth opening faces the battery module, the outer connecting pipe is arranged on the outer side of the inner connecting pipe, an air guide channel is formed between the inner connecting pipe and the outer connecting pipe, one end of the air guide channel faces the fan blade part of the fan device, the other end of the air guide channel is connected with the spacing space, the sectional area of the second opening of the inner connecting pipe is larger than that of the first opening, and the sectional area of the fourth opening of the outer connecting pipe is larger than that of the third opening.

2. The battery apparatus for reducing operating temperature of claim 1, further comprising a fire protection filter layer positioned on an air intake side of the fan assembly.

3. The battery apparatus for reducing an operating temperature according to claim 2, further comprising a sealing unit for disposing the fan device and the fireproof filter layer on the housing, the fireproof filter layer being located between the fan device and the housing, and the sealing unit being for preventing gas in the accommodation space of the housing from flowing back to the outside of the housing.

4. The battery apparatus for reducing an operating temperature according to claim 1, wherein an inner side of the inner connection pipe has an isolation passage, one end of which faces the driving part of the fan device, and the other end of which is connected to the battery module.

5. The battery apparatus of claim 4, further comprising at least one pouch positioned within said isolated channel of said inner connection tube and containing water or a non-flammable phase change material within said at least one pouch.

6. The battery apparatus for reducing an operating temperature according to claim 5, wherein at least one connection hole is provided on the inner connection pipe, and the isolation passage of the inner connection pipe is connected to the space or the air guide passage via the at least one connection hole.

7. The battery apparatus for reducing an operating temperature according to claim 1, wherein the first opening of the inner connection pipe and the third opening of the outer connection pipe are circular, and the second opening of the inner connection pipe and the fourth opening of the outer connection pipe are square.

8. The battery apparatus for reducing an operating temperature according to claim 1, wherein a cross section of the air guide passage is annular, a cross section of the air guide passage toward the fan device is annular, and a cross section of the air guide passage toward the space is square annular.

9. The battery apparatus for reducing an operating temperature of claim 1, further comprising a plurality of baffles for connecting the inner connecting tube and the outer connecting tube, the baffles being positioned within the air guiding channel and dividing the air guiding channel into a plurality of secondary air guiding channels.

10. The battery apparatus of claim 1, further comprising at least one pocket positioned in an installation space between the outer connection tube, the housing, and the fan device, and wherein water or a non-flammable phase change material is disposed in the at least one pocket.

11. The battery apparatus for reducing an operating temperature according to claim 10, wherein at least one connection hole is provided on the outer connection pipe, the at least one connection hole connecting the installation space and the interval space between the outer connection pipe, the housing and the fan device or the air guide passage.

12. The battery apparatus for reducing an operating temperature according to claim 1, wherein the fan unit includes a fixing frame, the fan unit is connected to the fixing frame via the driving unit, and an inner side of the inner connection pipe has an isolation passage, one end of the isolation passage is connected to the fixing frame of the fan unit, and the other end of the isolation passage is connected to the battery module.

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