CN117497948A - Battery pack safety valve and battery pack - Google Patents
Battery pack safety valve and battery pack Download PDFInfo
- Publication number
- CN117497948A CN117497948A CN202210879855.0A CN202210879855A CN117497948A CN 117497948 A CN117497948 A CN 117497948A CN 202210879855 A CN202210879855 A CN 202210879855A CN 117497948 A CN117497948 A CN 117497948A
- Authority
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- China
- Prior art keywords
- battery pack
- valve
- hole
- cover plate
- moisture absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010521 absorption reaction Methods 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 239000002274 desiccant Substances 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 7
- 239000002250 absorbent Substances 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000007791 dehumidification Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
- H01M50/333—Spring-loaded vent valves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a battery pack safety valve and a battery pack, comprising: the valve cover, the valve body, the moisture absorption component and the rotary driving mechanism; the valve cover is provided with a valve core, and a plurality of first air holes are formed in the valve cover around the valve core; the valve body comprises a circular bottom wall and a cylindrical side wall, the circular bottom wall is provided with a first through hole for accommodating the valve core to pass through, the circular bottom wall at the periphery of the first through hole is provided with a plurality of second air holes, the circular bottom wall is connected with the battery pack shell, and the second air holes are communicated with the inside of the battery pack; an elastic expansion piece is arranged between the bottom end of the valve core and the bottom wall; the moisture absorption assembly and the rotary driving mechanism are arranged inside the valve body, the rotary driving mechanism is used for driving the moisture absorption assembly to rotate around the valve core, when the moisture absorption assembly rotates to the first position, the moisture absorption assembly is only communicated with the second through hole, and when the moisture absorption assembly rotates to the second position, the moisture absorption assembly is only communicated with the first through hole. The humidity inside the battery pack is reduced, and the performance stability and the safety of the battery pack are improved.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a battery pack safety valve and a battery pack.
Background
The battery pack is a power source or storage medium of a new energy electric vehicle, an energy storage power station, new energy application and the like, the battery pack is provided with an explosion-proof ventilation valve, water vapor in air can enter the battery pack along with the air, if the battery pack works in an environment with large temperature and humidity changes for a long time, the water vapor can be continuously input into the battery pack, and condensed water is formed in the battery pack when the temperature changes, so that the humidity in the battery pack is increased, and hidden danger is caused to the performance and the safe operation of the battery pack.
Disclosure of Invention
The invention aims to provide a battery pack safety valve and a battery pack, which are used for reducing the humidity in the battery pack and improving the performance stability and safety of the battery pack.
In a first aspect, the present invention provides a battery pack safety valve, comprising: the valve cover, the valve body, the moisture absorption component and the rotary driving mechanism;
a tubular valve core is arranged in the center of the lower surface of the valve cover, the axial direction of the valve core is perpendicular to the lower surface of the valve cover, and a plurality of first air holes penetrating through the valve cover are formed in the valve cover around the valve core;
the valve body comprises a circular bottom wall and a cylindrical side wall positioned on the bottom wall, a first through hole for accommodating the valve core to pass through is formed in the center of the circular bottom wall, a plurality of second air holes penetrating through the circular bottom wall are formed in the circular bottom wall at the periphery of the first through hole, the circular bottom wall is connected with a battery pack shell, and the second air holes are communicated with the inside of the battery pack;
the lower surface of the valve cover is covered with the top of the side wall of the cylinder, the bottom end of the valve core penetrates through the first through hole and extends to the outside of the valve body, and an elastic telescopic piece is arranged between the bottom end of the valve core and the bottom wall;
the rotary driving mechanism is used for driving the moisture absorption assembly to rotate around the valve core, when the moisture absorption assembly rotates to a first position, the moisture absorption assembly is only communicated with the second through hole, and when the moisture absorption assembly rotates to a second position, the moisture absorption assembly is only communicated with the first through hole.
Optionally, the moisture absorption component comprises a round upper cover plate, a round lower cover plate and a dryer which is clamped between the upper cover plate and the lower cover plate;
the edges of the upper cover plate and the lower cover plate are in sliding sealing connection with the inner surface of the side wall of the cylinder;
the center of the upper cover plate is provided with a second through hole for accommodating the valve core to pass through, and the upper cover plate at the periphery of the second through hole is provided with a third air hole penetrating through the upper cover plate;
a third through hole for accommodating the valve core to pass through is formed in the center of the lower cover plate, and a fourth air hole penetrating through the lower cover plate is formed in the lower cover plate at the periphery of the third through hole; the third air hole and the fourth air hole are staggered in the vertical direction for a set angle;
when the absorbent assembly rotates to the first position, the fourth air holes coincide with the second air holes, and the third air holes are staggered from the first air holes;
when the absorbent assembly is rotated to the second position, the third air holes coincide with the first air holes, and the second air holes are staggered from the fourth air holes.
Optionally, the rotary driving mechanism comprises a rotary electromagnet, and the rotary electromagnet comprises a main body part, a rotating shaft and a deflector rod arranged on the rotating shaft;
the main body part set up in inside the case, be equipped with on the lateral wall of case and be used for holding rotatory electro-magnet driving lever pivoted fenestration, the driving lever pass fenestration with the moisture absorption subassembly is connected.
Optionally, the dryer is arranged in the annular cavity between the side wall of the cylinder and the valve core, the dryer is cylindrical, and a fourth through hole for accommodating the valve core to pass through is formed in the center of the dryer.
Optionally, the dryer is a block-shaped dryer;
alternatively, the dryer includes a housing having a mesh, the housing having desiccant particles disposed therein.
Optionally, the desiccant comprises at least one of silica gel desiccant, zeolite molecular sieve, calcium chloride, activated alumina.
Optionally, the device further comprises a heating component, wherein the heating component is arranged in the valve body and is used for heating the dryer when the moisture absorption component rotates to the second position;
the heating component is an electric heating sheet arranged inside the valve body.
Optionally, a waterproof and breathable film covering the upper surface of the valve cover is arranged on the valve cover.
Optionally, the sealing device further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is arranged at the top of the side wall of the cylinder, and the second sealing ring is arranged at the edge of the bottom surface of the circular bottom wall.
In a second aspect, the present invention provides a battery pack, including a battery pack housing and a battery module disposed in the battery pack housing, wherein a safety valve hole is formed in the battery pack housing, and the battery pack safety valve of the first aspect is disposed in the safety valve hole.
The invention has the beneficial effects that:
the invention discloses a battery pack safety valve, which comprises a valve cover, a valve body, a moisture absorption component and a rotary driving mechanism, wherein a tubular valve core is arranged in the center of the lower surface of the valve cover, the valve body comprises a circular bottom wall and a cylindrical side wall positioned on the bottom wall, a first through hole for accommodating the valve core to pass through is formed in the center of the circular bottom wall, a plurality of second air holes penetrating through the circular bottom wall are formed in the circular bottom wall on the periphery of the first through hole, the circular bottom wall is connected with a battery pack shell, the second air holes are communicated with the inside of the battery pack, the lower surface of the valve cover is covered with the top of the cylindrical side wall, the bottom end of the valve core passes through the first through hole and extends to the outside of the valve body, an elastic telescopic piece is arranged between the bottom end of the valve core and the bottom wall, the moisture absorption component and the rotary driving mechanism are arranged in the valve body, the rotary driving mechanism is used for driving the moisture absorption component to rotate around the valve core, when the moisture absorption component rotates to a first position, the moisture absorption component is only communicated with the second through hole, and only the inside of the battery pack can absorb moisture in the battery pack, and when larger pressure in the battery pack needs to discharge air, the inside the battery pack overcomes the elasticity of the elastic telescopic piece, and the inside the battery pack can be opened to exhaust outside the battery pack and the moisture when the larger pressure in the battery pack.
The system of the present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows an exploded view of a battery pack safety valve according to embodiment 1 of the present invention.
Fig. 2 is a perspective view showing a top view of a battery pack safety valve according to embodiment 1 of the present invention.
Fig. 3 is a perspective view showing a bottom view of a battery pack safety valve according to embodiment 1 of the present invention.
Fig. 4 is a cross-sectional view showing a moisture absorption state in which a moisture absorption member is located at a first position in a battery pack safety valve according to embodiment 1 of the present invention.
Fig. 5 is a cross-sectional view showing a moisture-discharging state in which a moisture-absorbing member is located at a second position in a battery pack safety valve according to embodiment 1 of the present invention.
Fig. 6 is a cross-sectional view showing a state in which a moisture absorption member is decompressed at a first position in a battery pack safety valve according to embodiment 1 of the present invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are illustrated in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
As shown in fig. 1 to 3, a battery pack safety valve includes: a valve cover 1, a valve body 9, a moisture absorption component and a rotary driving mechanism 4;
the center of the lower surface of the valve cover 1 is provided with a tubular valve core 12, the axial direction of the valve core 12 is perpendicular to the lower surface of the valve cover 1, and the valve cover 1 around the valve core 12 is provided with a plurality of first air holes 11 penetrating through the valve cover 1;
the valve body 9 comprises a circular bottom wall and a cylindrical side wall positioned on the bottom wall, a first through hole for accommodating the valve core 12 to pass through is formed in the center of the circular bottom wall, a plurality of second air holes 21 penetrating through the circular bottom wall are formed in the circular bottom wall at the periphery of the first through hole, the circular bottom wall is connected with the battery pack shell 20, and the second air holes 21 are communicated with the interior of the battery pack;
the lower surface of the valve cover 1 is covered with the top of the side wall of the cylinder, the bottom end of the valve core 12 passes through the first through hole and extends to the outside of the valve body 9, and an elastic telescopic piece is arranged between the bottom end of the valve core 12 and the bottom wall;
the moisture absorption assembly and the rotary driving mechanism 4 are arranged inside the valve body 9, the rotary driving mechanism 4 is used for driving the moisture absorption assembly to rotate around the valve core 12, when the moisture absorption assembly rotates to the first position, the moisture absorption assembly is only communicated with the second through hole, and when the moisture absorption assembly rotates to the second position, the moisture absorption assembly is only communicated with the first through hole.
In this embodiment, the elastic expansion piece includes a spring 6 and a spring limiting piece 7, the spring limiting piece 7 is fixedly connected with the bottom of the valve core 12, and the spring 6 is installed on the valve core 12 between the spring limiting piece 7 and the circular bottom wall of the valve body 9. The valve body 9 may be machined from metal or molded from plastic.
In this embodiment, the moisture absorbing assembly includes a circular upper cover plate 2, a lower cover plate 5, and a dryer 3 interposed between the upper cover plate 2 and the lower cover plate 5;
the edges of the upper cover plate 2 and the lower cover plate 5 are in sliding sealing connection with the inner surface of the side wall of the cylinder;
the center of the upper cover plate 2 is provided with a second through hole for accommodating the valve core 12 to pass through, and the upper cover plate 2 at the periphery of the second through hole is provided with a third air hole 51 penetrating through the upper cover plate 2;
the center of the lower cover plate 5 is provided with a third through hole for accommodating the valve core 12 to pass through, and the lower cover plate 5 at the periphery of the third through hole is provided with a fourth air hole 91 penetrating through the lower cover plate 5; the third air hole 51 and the fourth air hole 91 are vertically staggered by a set angle;
when the absorbent assembly is rotated to the first position, the fourth air holes 91 coincide with the second air holes 21, and the third air holes 51 are offset from the first air holes 11;
when the absorbent assembly is rotated to the second position, the third air holes 51 coincide with the first air holes 11, and the second air holes 21 are offset from the fourth air holes 91.
The rotary driving mechanism 4 comprises a rotary electromagnet, and the rotary electromagnet comprises a main body part, a rotating shaft and a deflector rod arranged on the rotating shaft;
the main body part is arranged in the valve core 12, a window for accommodating the rotation of a rotary electromagnet deflector rod is arranged on the side wall of the valve core 12, and the deflector rod passes through the window and is connected with the moisture absorption component.
In other embodiments, the rotation driving mechanism 4 may be a rotation driving member such as a stepping motor.
As shown in fig. 1, the first air hole 11, the second air hole 21, the third air hole 51 and the fourth air hole 91 are all four equally spaced (45 degrees) on the corresponding components, and the rotary electromagnet controls the whole moisture absorption assembly to rotate 45 degrees each time.
As shown in fig. 4, when the moisture absorption component is located at the first position, the angles of the four second air holes 21 on the upper cover plate 2 and the four third air holes 51 on the lower cover plate 5 staggered in the vertical direction are 45 degrees, at this time, the angles of the first air holes 11 on the valve cover 1 and the second air holes 21 on the upper cover plate 2 staggered in the vertical direction are 45 degrees, the fourth air holes 91 at the bottom of the valve body 9 are overlapped with the third air holes 51 on the lower cover plate 5, at this time, the moisture absorption component and the air path inside the battery pack are opened, and the moisture absorption component absorbs the moisture inside the battery pack; as shown in fig. 5, when the moisture in the moisture absorbing component needs to be discharged, the rotating electromagnet controls the moisture absorbing component to rotate 45 degrees, at this time, the third air hole 51 on the lower cover plate 5 is staggered 45 degrees with the fourth air hole 91 at the bottom of the valve body 9, so that the air passage leading to the interior of the battery pack is disconnected, meanwhile, the second air hole 21 on the upper cover plate 2 coincides with the first air hole 11 on the valve cover 1, the moisture absorbing component and the outward exhaust passage of the safety valve are opened, and the moisture is discharged out of the battery pack through the safety valve film structure, so as to play a role in dehumidifying the battery pack. After dehumidification is completed, the rotary electromagnet rotates 45 degrees again (both forward and reverse rotation can be performed), so that the moisture absorption component is reset to the state of the first position. As shown in fig. 6, when a larger pressure exists in the battery pack and gas needs to be discharged outwards, after the internal pressure overcomes the elasticity of the spring 6, the valve cover 1 bounces from the top of the valve body 9, and the safety valve opens the gas in the battery pack and discharges to the outside of the battery pack from the fourth air hole 91, the third air hole 51 and the second air hole 21 to the gap between the valve cover 1 and the valve body 9, so as to play a role in pressure relief and explosion prevention.
In this embodiment, the dryer 3 is disposed in an annular cavity between the sidewall of the cylinder and the valve core 12, the dryer 3 is cylindrical, and a fourth through hole for receiving the valve core 12 is disposed in the center of the dryer 3.
The dryer 3 may be a block-shaped dryer; alternatively, the dryer 3 may comprise a housing with mesh openings, inside which the desiccant particles are arranged. The desiccant may include silica gel desiccant, zeolite molecular sieve, calcium chloride, activated alumina, and the like, which may absorb moisture. The dryer 3 is detachably and fixedly connected with the upper cover plate 2 and the lower cover plate 5, and the upper cover plate 2 is connected with the lower cover plate 5 through a connecting piece and fixes the dryer 3 between the upper cover plate 2 and the lower cover plate 5.
After the safety valve of the embodiment is mounted and fixed with the battery pack housing 20, the valve body 9 and the inside of the battery pack assembly are generally in the same type, i.e. the default moisture absorbing component is located at the first position, and the moisture in the battery pack can be absorbed in the valve body 9 through the adsorption effect of the desiccant.
In this embodiment, a heating assembly (not shown) is provided in the valve body 9 for heating the dryer 3 when the absorbent assembly is rotated to the second position.
The heating element can be the electric heating piece that sets up in valve body 9 inside, also can be heating resistance wire, and the heating element can set up on valve body 9 inner wall, or set up at the 3 surface of desicator, and the heating element can heat the drier when the hygroscopic component is rotatory to the second position, makes the moisture in the drier discharge to the atmosphere with higher speed, realizes the cyclic utilization of drier, avoids frequently changing the drier.
In this embodiment, the valve cover 1 is provided with a waterproof and breathable film covering the upper surface of the valve cover 1. Preferably, the waterproof breathable film can meet the waterproof requirement above IP67 under the condition that the battery pack is submerged.
In this embodiment, the sealing device further comprises a first sealing ring 8 and a second sealing ring 10, wherein the first sealing ring 8 is arranged at the top of the side wall of the cylinder, and the second sealing ring 10 is arranged at the bottom edge of the circular bottom wall.
Optionally, the embodiment may further include a humidity sensor and a control unit, where the humidity sensor may be disposed inside the battery pack, the humidity sensor, the rotary driving mechanism 4, and the heating assembly are respectively connected with the control unit, where the control unit is disposed outside the battery pack, the humidity sensor may be directly connected with the control unit by passing through the battery pack casing through an electrical connection wire seal, and the electrical connection wire corresponding to the rotary driving mechanism 4 and the heating assembly may pass through the valve body in a proper position that does not interfere with rotation of the dryer and be connected with the control unit. The humidity sensor monitors the humidity inside the battery pack in real time, when the humidity inside the battery pack is monitored to be greater than a set threshold value, the control unit controls the rotation driving mechanism 4 to rotate to drive the moisture absorption assembly to rotate from a first position to a second position, then controls the heating assembly to heat the moisture absorption assembly to a set time length, discharges the moisture in the moisture absorption assembly to the atmosphere, then closes the heating assembly and controls the rotating assembly to drive the moisture absorption assembly to reset to the first position again, absorbs moisture in the battery pack again, and repeats the process until the humidity sensor detects that the humidity inside the battery pack is less than the set threshold value, so that the active moisture discharging function inside the battery pack is realized. When the pressure in the battery pack is greater than the pressure of the spring 6, the valve cover 1 is automatically opened, the pressure is directly released outwards, and the original position is restored under the action of the spring 6 after the pressure is reduced.
The safety valve for the battery pack can ensure that the humidity in the battery pack is always in a reasonable range, thereby ensuring effective electrical insulation and pressure resistance in the battery pack, ensuring no water accumulation in the battery pack, reducing the risk of extreme thermal runaway, and solving the problem of high safety risk caused by high humidity of the battery pack.
Example 2
The embodiment provides a battery pack, which comprises a battery pack shell 20 and a battery module arranged in the battery pack shell 20, wherein a safety valve hole is formed in the battery pack shell 20, and a battery pack safety valve of the first aspect is arranged on the safety valve hole.
The battery pack of this embodiment adopts the battery pack relief valve of embodiment 1 can effectively carry out moisture absorption and dehumidification to the battery pack inside, effectively reduces the inside humidity of battery pack, guarantees that the inside humidity of battery pack is in reasonable within range, improves the security of battery pack operation.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. A battery pack safety valve, comprising: the valve cover, the valve body, the moisture absorption component and the rotary driving mechanism;
a tubular valve core is arranged in the center of the lower surface of the valve cover, the axial direction of the valve core is perpendicular to the lower surface of the valve cover, and a plurality of first air holes penetrating through the valve cover are formed in the valve cover around the valve core;
the valve body comprises a circular bottom wall and a cylindrical side wall positioned on the bottom wall, a first through hole for accommodating the valve core to pass through is formed in the center of the circular bottom wall, a plurality of second air holes penetrating through the circular bottom wall are formed in the circular bottom wall at the periphery of the first through hole, the circular bottom wall is connected with a battery pack shell, and the second air holes are communicated with the inside of the battery pack;
the lower surface of the valve cover is covered with the top of the side wall of the cylinder, the bottom end of the valve core penetrates through the first through hole and extends to the outside of the valve body, and an elastic telescopic piece is arranged between the bottom end of the valve core and the bottom wall;
the rotary driving mechanism is used for driving the moisture absorption assembly to rotate around the valve core, when the moisture absorption assembly rotates to a first position, the moisture absorption assembly is only communicated with the second through hole, and when the moisture absorption assembly rotates to a second position, the moisture absorption assembly is only communicated with the first through hole.
2. The battery pack safety valve according to claim 1, wherein the moisture absorbing assembly comprises a circular upper cover plate, a lower cover plate, and a dryer interposed between the upper cover plate and the lower cover plate;
the edges of the upper cover plate and the lower cover plate are in sliding sealing connection with the inner surface of the side wall of the cylinder;
the center of the upper cover plate is provided with a second through hole for accommodating the valve core to pass through, and the upper cover plate at the periphery of the second through hole is provided with a third air hole penetrating through the upper cover plate;
a third through hole for accommodating the valve core to pass through is formed in the center of the lower cover plate, and a fourth air hole penetrating through the lower cover plate is formed in the lower cover plate at the periphery of the third through hole; the third air hole and the fourth air hole are staggered in the vertical direction for a set angle;
when the absorbent assembly rotates to the first position, the fourth air holes coincide with the second air holes, and the third air holes are staggered from the first air holes;
when the absorbent assembly is rotated to the second position, the third air holes coincide with the first air holes, and the second air holes are staggered from the fourth air holes.
3. The battery pack safety valve according to claim 2, wherein the rotary driving mechanism includes a rotary electromagnet including a main body portion, a rotary shaft, and a lever provided on the rotary shaft;
the main body part set up in inside the case, be equipped with on the lateral wall of case and be used for holding rotatory electro-magnet driving lever pivoted fenestration, the driving lever pass fenestration with the moisture absorption subassembly is connected.
4. The battery pack safety valve according to claim 2, wherein the dryer is disposed in an annular cavity between the cylindrical sidewall and the valve cartridge, the dryer is cylindrical, and a fourth through hole for receiving the valve cartridge therethrough is provided at a center of the dryer.
5. The battery pack safety valve according to claim 4, wherein the dryer is a block-shaped desiccant;
alternatively, the dryer includes a housing having a mesh, the housing having desiccant particles disposed therein.
6. The battery pack safety valve of claim 5, wherein the desiccant comprises at least one of a silica gel desiccant, a zeolite molecular sieve, calcium chloride, activated alumina.
7. The battery pack safety valve of claim 2, further comprising a heating assembly disposed within the valve body for heating the dryer when the moisture absorbing assembly is rotated to the second position;
the heating component is an electric heating sheet arranged inside the valve body.
8. The battery pack safety valve according to claim 1, wherein a waterproof and breathable film covering the upper surface of the valve cover is provided on the valve cover.
9. The battery pack safety valve of claim 2, further comprising a first seal ring disposed on top of the cylindrical sidewall and a second seal ring disposed on a bottom edge of the circular bottom wall.
10. A battery pack, characterized by comprising a battery pack shell and a battery module arranged in the battery pack shell, wherein a safety valve hole is formed in the battery pack shell, and the battery pack safety valve according to any one of claims 1-9 is arranged on the safety valve hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210879855.0A CN117497948A (en) | 2022-07-25 | 2022-07-25 | Battery pack safety valve and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210879855.0A CN117497948A (en) | 2022-07-25 | 2022-07-25 | Battery pack safety valve and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN117497948A true CN117497948A (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210879855.0A Pending CN117497948A (en) | 2022-07-25 | 2022-07-25 | Battery pack safety valve and battery pack |
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| Country | Link |
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| CN (1) | CN117497948A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967845A (en) * | 2024-03-28 | 2024-05-03 | 靖江市亚泰物流装备有限公司 | Tank safety valve |
-
2022
- 2022-07-25 CN CN202210879855.0A patent/CN117497948A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967845A (en) * | 2024-03-28 | 2024-05-03 | 靖江市亚泰物流装备有限公司 | Tank safety valve |
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