Classifications

• • 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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/572—Means for preventing undesired use or discharge
  • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
  • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
  • H01M50/593—Spacers; Insulating plates
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
• • 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
  • H01M50/342—Non-re-sealable arrangements
  • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
• • 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

Definitions

• the invention relates to a battery explosion-proof cover assembly and a battery. Background technique
• an explosion-proof safety device that opens the valve body exhaust gas when the internal pressure of the battery exceeds the set value has been provided on the battery.
• Chinese patent CN2411578Y discloses an explosion-proof cover plate.
• the battery with this explosion-proof mechanism can cut off the current when the internal pressure rises. If the internal pressure of the battery continues to rise after the current is cut off, when the pressure exceeds the explosion-proof film When the pressure is predetermined, the explosion-proof membrane is torn and the battery is relieved to prevent the battery from exploding.
• the battery structure using the above-mentioned explosion-proof structure is as shown in Fig. 1.
• the explosion-proof cover 2 of the battery having such an explosion-proof structure and the battery container 1 are sealed by mechanical flange fastening.
• the annular sealing groove 3 is prepared in advance on the battery container 1, so that the inside of the battery container 1 is formed with a step 4 for abutting and positioning the explosion-proof cover 2.
• the batteries using the explosion-proof structure described above are batteries of a battery container having high mechanical strength, and the most common one is a cylindrical steel shell battery. Since the wall thickness of the battery container is limited, a battery using a material having a small mechanical strength such as aluminum or aluminum alloy as a battery container should not be sealed by a mechanical flange method, and thus the above-mentioned explosion-proof cover cannot be applied to a battery having a soft battery container.
• the battery with low mechanical strength of the current battery container does not use a mechanical flanged seal, but a welded seal is used, and an explosion-proof device is not provided on the cover assembly of the battery.
• the object of the present invention is to overcome the technical drawbacks of the above prior art that an explosion-proof device cannot be provided on a cover plate assembly having a small mechanical strength of a battery container, and to provide a battery container (such as a steel case) or a mechanical strength regardless of mechanical strength.
• a battery container such as a steel case
• Lower battery containers such as aluminum, aluminum alloy, etc. are easy to use with explosion-proof cover assemblies and batteries.
• An explosion-proof cover assembly comprising a cover plate, an insulating member, an explosion-proof membrane, a pull plate and a mounting seat, wherein the mounting seat is provided with a cavity communicating with the upper and lower sides, wherein the cavity is insulated and sealingly fixed by the insulating member
• the explosion-proof membrane, the cover plate and the explosion-proof membrane are electrically connected and form a pressure relief chamber therebetween, and the explosion-proof membrane is electrically connected with the pull plate located under the insulation member and supported on the assembly seat, so that the explosion-proof When the pressure applied to the membrane exceeds the set value, the explosion-proof membrane is disconnected from the pull plate.
• An explosion-proof battery includes a container, a battery unit housed in the container, and a cover assembly for sealing and discharging current from the battery unit, wherein the cover assembly includes a cover plate, an insulating member, an explosion-proof film, a pull plate, and an assembly a mounting cavity is disposed on the mounting seat, wherein the cover plate and the explosion-proof membrane are insulated and sealed by an insulating member, and the cover plate is electrically connected to the explosion-proof membrane and forms a pressure relief chamber therebetween.
• a pressure relief hole is disposed on the cover plate, and the explosion-proof membrane is electrically connected to a pull plate located under the insulation member and supported on the assembly seat, so that when the pressure of the explosion-proof film exceeds a set value, The explosion-proof membrane is disconnected from the pull plate.
• the inner wall of the cavity of the mounting seat has an annular sealing groove, and the periphery of the cover plate is insulated by an insulating member and sealed and fixed in the annular sealing groove.
• the mounting base is a mounting plate having a cover hole, and an upwardly extending barrel around the cover hole, the cavity being formed in the barrel.
• An annular annular surface is formed around the hole of the cover plate in the cylinder, and the upper portion of the cylindrical body forms the annular sealing groove by being bent inward.
• the assembly base is a mounting plate having a cover hole, and a downwardly extending cylinder around the cover hole, the cavity being formed in the cylinder.
• An annular annular surface is formed around the hole of the cover plate in the cylinder, and the lower portion of the cylindrical body forms the annular sealing groove by being bent inward.
• the cover plate protrudes outward to form a cavity, and the periphery of the explosion-proof membrane is fixed to the inner wall of the cavity by welding and sealing
• the cover plate protrudes outward to form a cavity, and a periphery of the explosion-proof film and a periphery of the cover plate are sealed by overlapping compression
• the connection manner is snap-fitted in the annular seal groove.
• the bottom of the cavity has a support portion, and the support portion is provided with a vent hole and a connecting hole at the middle of the support portion, the pull plate is fixed at the connection hole on the outer side of the support portion, and the middle portion of the explosion-proof film has a a protrusion that protrudes into the connection hole and is electrically connected to the pull plate.
• a pressure relief hole is disposed on the cover plate.
• the cover plate protrudes outward to form a cavity, and the periphery of the explosion-proof film is fixed on the inner wall of the cavity by means of welding and sealing.
• the pull plate is provided with a vent hole for accessing the explosion-proof membrane.
• the pull plate is provided with a thin-walled welded portion having a thickness smaller than the thickness of the pull plate, and an electrical connection point between the explosion-proof film and the pull plate is on the welded portion.
• a nick is provided on the rupture film for presetting the pressure that the rupture disk can withstand by changing the depth of the nick, so that the rupture film ruptures when it exceeds the pressure it can withstand.
• the score is a closed annular score. Further, at least two linear indentations intersecting the closed annular indentations are disposed on the explosion-proof membrane. Further, the plurality of linear scores are radially distributed around the closed annular score.
• the assembly seat is provided with a cavity communicating with the upper and lower sides, and the cover plate, the insulating member, the explosion-proof membrane and the pull plate are installed in the cavity, and the material of the assembly seat can be flexibly controlled according to requirements, which is suitable for It is also suitable for mounting on a battery container (such as a steel case) having a high mechanical strength sealed by a mechanical flange method, and is also mounted on a battery container (such as aluminum, aluminum alloy, or the like) having a low mechanical strength sealed by welding.
• a battery container such as a steel case
• a battery container such as aluminum, aluminum alloy, or the like
• the invention is applicable not only to various batteries using battery containers, but also to the strength of the battery mechanical container and the shape of the battery, such as a cylindrical aluminum shell battery, a square aluminum shell battery, a cylindrical steel shell electric battery, a square steel shell electric battery. Wait. '
• the shape of the annular sealing groove, the explosion-proof membrane and the cover plate are not limited by the shape of the battery container (housing), the annular sealing groove, The explosion-proof membrane and the cover plate can be conveniently designed into any shape, and the circular shape is optimal, and the circular shape is convenient for processing and manufacturing, and the assembly is convenient.
• the wall thickness of the assembly seat can be easily adjusted, and is not limited by the wall thickness of the cover plate to ensure a good seal in the cavity.
• a vent hole and a connecting hole are formed in the support portion, and the pull plate is fixed at the connecting hole on the outer side of the support portion, which facilitates the fixing of the pull plate.
• the protrusion is inserted into the connection hole and electrically connected with the pull plate, which facilitates the electrical connection between the pull plate and the explosion-proof film.
• the pressure relief chamber between the cover plate and the explosion-proof membrane can facilitate the tearing of the explosion-proof membrane.
• the cover plate protrudes outward to form a cavity, which can facilitate the tearing of the explosion-proof membrane, and the same protrusion facilitates the extraction of the electrode.
• the closed annular nick on the explosion-proof membrane is more likely to rupture, and the pressure value at the time of rupture is closest to the theoretically set rupture pressure value; at the same time, the rupture has a large opening and a quick relief.
• the thin-walled welded portion provided on the pull plate facilitates the welding of the explosion-proof film and the pull plate.
• Figure 1 is a schematic view of a battery using a conventional explosion-proof structure
• FIG. 2 is a schematic structural view of an explosion-proof cover assembly
• Figure 3 is a schematic view showing the structure of the connection point of the explosion-proof membrane and the pull plate in Figure 2;
• Figure 4 is a schematic view showing the tearing of the score on the explosion-proof film of Figure 2;
• Figure 5 is a schematic structural view of another explosion-proof cover assembly
• Figure 6 is a schematic structural view of still another explosion-proof cover assembly
• Figure 7 is a schematic structural view of still another explosion-proof cover assembly
• Figure 8 is a longitudinal sectional view of the explosion-proof membrane of Figure 7;
• Figure 9 is a plan view of the explosion-proof membrane of Figure 7.
• Figure 10 is a schematic structural view of a mounting base
• Figure 11 is a schematic structural view of another assembly base
• Figure 12 is a schematic view showing the structure of still another assembly base.
• Figure 13 is a schematic view showing the structure of a battery using the cover assembly shown in Figure 2.
• Figure 14 is a schematic view showing the structure of a battery using the cover assembly shown in Figure 5.
• Figure 15 is a schematic view showing the structure of a battery using the cover assembly shown in Figure 6.
• FIGS. 2-4 and 10 are schematic views showing the structure of a battery using the cover assembly shown in Figure 7.
• An explosion-proof cover assembly as shown in FIGS. 2-4 and 10, includes a mounting seat 17, a cover plate 15, an insulating member 11, an explosion-proof film 8, and a pull plate 5.
• the mounting base is a mounting plate, and the mounting plate 17 has a cover hole 19, and an upwardly extending cylindrical body 25 is formed around the cover hole 19, and a cavity 28 communicating with the upper and lower sides is formed in the cylindrical body 25.
• An annular land 18 is formed around the cover hole 19 in the cylinder, and an upper portion of the cylinder 25 forms an annular seal groove 29 in the inner wall of the cavity 28 of the mount 17 by means of inward bending (bending portion 16).
• the cover plate 15 as the electrode for extracting current has a pressure relief hole 14 , and the periphery of the cover plate 15 is insulated by the insulating member 11 and sealed and fixed in the annular sealing groove 29 , and the cover plate 15 protrudes outward to form a cavity, and the explosion-proof membrane 8 The periphery is welded to the inner wall 12 of the chamber, and the cover plate 15 is electrically connected to the explosion-proof membrane 8 and forms a pressure relief chamber 13 therebetween.
• the explosion-proof membrane 8 is electrically connected to a pull plate 5 located below it, insulated by the insulating member 11 and supported on the outer side of the mount 17, and the pull plate 5 is connected to a tab (not shown) of the battery.
• the pull plate 5 is provided with an air hole 10 reaching the explosion-proof film 8 and a thin-walled welded portion 6 having a thickness smaller than the thickness of the pull plate 5, and the electrical connection point 7 of the explosion-proof film 8 and the pull plate 5 is on the welded portion 6, when the explosion-proof film 8
• the explosion-proof membrane 8 is disconnected from the pull plate 5.
• a closed annular score 9 is provided on the explosion-proof membrane 8.
• the pressure of the explosion-proof membrane 8 can be preset by changing the depth of the score 9 so that the explosion-proof membrane 8 is broken when it exceeds the pressure that can be withstood.
• the insulating member 11 is integrally formed by injection molding, and may be a plurality of separate insulating members as needed, as long as the above insulation and sealing can be achieved.
• an explosion-proof battery using the above-described cover assembly structure includes a container 1, a battery unit 2 housed in the container 1, a cover plate assembly for sealing the container 1 and drawing current from the battery unit 2, and a battery unit.
• An electrode 3 of 2 is electrically connected to the pull plate 5, and the upper end opening of the container 1 is welded to the outer side surface of the mounting plate 17.
• Embodiment 2 Another explosion-proof cover assembly, as shown in FIG. 5 and FIG. 10, includes a mounting seat 17, a cover plate 15, an insulating member 11, an explosion-proof film 8 and a pull plate 5.
• the mounting base 17 is a mounting plate.
• the mounting plate 17 has a cover hole 19, and an upwardly extending cylindrical body 25 is formed around the cover hole 19, and a cavity 28 communicating with the upper and lower sides is formed in the cylindrical body 25.
• An annular land 18 is formed around the cover hole 19 in the cylinder, and an upper portion of the cylinder 25 forms an annular seal groove 29 in the inner wall of the cavity 28 of the mount 17 by means of inward bending (bending portion 16).
• the cover plate 15 as an electrode for extracting current has a pressure relief hole 14 , and the periphery of the explosion-proof membrane 8 and the periphery of the cover plate 15 are snap-fitted and fixed in the annular seal groove 29 by a connection manner of overlapping compression seals.
• the cover plate 15 projects outward, and the cover plate 15 is electrically connected to the explosion-proof membrane 8 and forms a pressure relief chamber 13 therebetween.
• the explosion-proof membrane 8 is electrically connected to a pull plate 5 located below it, insulated by the insulating member 11 and supported on the outer side of the mount 17, and the pull plate 5 is connected to a tab (not shown) of the battery.
• the pull plate 5 is provided with an air hole 10 reaching the explosion-proof film 8 and a thin-walled welded portion 6 having a thickness smaller than the thickness of the pull plate 5, and the electrical connection point 7 of the explosion-proof film 8 and the pull plate 5 is on the welded portion 6, when the explosion-proof film 8 When the pressure received exceeds the set value, the explosion-proof membrane 8 is disconnected from the pull plate 5.
• a closed annular score 9 is provided on the explosion-proof membrane 8.
• the pressure of the explosion-proof membrane 8 can be preset by changing the depth of the score 9 so that the explosion-proof membrane 8 is broken when it exceeds the pressure that can be withstood.
• the explosion-proof battery using the above-mentioned cover assembly structure includes a container 1, a battery unit 2 housed in the container 1, a cover plate assembly for sealing the container 1 and drawing current from the battery unit 2, and a cover plate.
• the structure of the assembly is as shown in Fig. 5.
• An electrode 3 of the battery unit 2 is electrically connected to the pull plate 5, and the upper end opening of the container 1 is welded to the outer side surface of the mounting plate 17.
• an explosion-proof cover assembly as shown in FIG. 6 and FIG. 11, includes a mounting seat 17, a cover plate 15, an insulating member 11, an explosion-proof film 8 and a pull plate 5.
• the mounting base 17 is a mounting plate having a cover plate 19, and a downwardly extending cylindrical body 25 around the cover hole 19, and a cavity 28 communicating with the upper and lower sides is formed in the cylindrical body 25.
• the cover hole 19 in the cylinder body has an annular land 18 around it, and the lower portion of the cylinder 25 forms an annular seal groove 29 in the inner wall of the cavity 28 of the mount 17 by means of inward bending (bending portion 16).
• the cover plate 15 as the electrode for extracting current has a pressure relief hole 14 , and the periphery of the explosion-proof membrane 8 and the periphery of the cover plate 15 are snap-fitted and fixed in the annular sealing groove 29 by the overlapping compression sealing connection, and the cover plate 15 is outwardly
• the protrusions, the cover plate 15 are electrically connected to the explosion-proof membrane 8 and form a pressure relief chamber 13 therebetween.
• the explosion-proof membrane 8 is electrically connected to the pull plate 5 located underneath, insulated by the insulating member 11 and supported on the outer side of the mount 17, and the pull plate 5 is connected to a tab (not shown) of the battery.
• the pull plate 5 is provided with an air hole 10 reaching the explosion-proof film 8 and a thin-walled joint portion 6 having a thickness smaller than the thickness of the pull plate 5, and the electrical connection point 7 of the explosion-proof film 8 and the pull plate 5 is on the welded portion 6, when the explosion-proof film
• the explosion-proof membrane 8 is disconnected from the pull plate 5.
• a closed annular score 9 is provided on the explosion-proof membrane 8. By changing the depth of the score 9, the pressure of the explosion-proof membrane 8 can be withstood so that the explosion-proof membrane 8 is broken when it exceeds the pressure it can withstand.
• an explosion-proof battery using the above-described cover assembly structure includes a container 1, a battery unit 2 housed in the container 1, and a cover assembly for sealing the container 1 and drawing current from the battery unit 2, the cover assembly
• the structure is as shown in Fig. 6.
• An electrode 3 of the battery unit 2 is electrically connected to the pull plate 5, and the upper end opening of the container 1 is welded to the outer side surface of the mounting plate 17.
• Embodiment 4 another explosion-proof cover assembly, as shown in FIGS. 7-9 and 12, includes a mounting seat 17, a cover plate 15, The insulating member 11, the explosion-proof film 8 and the pull plate 5.
• the mounting base 17 is a mounting plate having a cover hole 19 therein, and an upwardly extending cylindrical body 25 is formed around the cover hole 19, and a cavity 28 communicating with the upper and lower sides is formed in the cylindrical body 25.
• An annular land 18 is formed around the cover hole 19 in the cylinder, and an upper portion of the cylinder 25 forms an annular seal groove 29 in the inner wall of the cavity 28 of the mount 17 by means of inward bending (bending portion 16).
• the cover plate 15 as the electrode for extracting current has a pressure relief hole 14 , and the periphery of the explosion-proof membrane 8 and the periphery of the cover plate 15 are snap-fitted and fixed in the annular sealing groove 29 by the overlapping compression sealing connection, and the cover plate 15 is outwardly
• the protrusions, the cover plate 15 are electrically connected to the explosion-proof membrane 8 and form a pressure relief chamber 13 therebetween.
• the bottom of the cavity 28 has a support portion 26, and the support portion 26 is provided with a vent hole 21 and a connecting hole 20 at the middle of the support portion 26.
• the pull plate 5 is insulated by the insulating member 11 and supported on the outer side of the support portion 26 At the connecting hole 20, the middle portion of the explosion-proof membrane 8 has a downward projection 27 which projects into the connecting hole 20. It is electrically connected to the pull plate 5, and the pull plate 5 is connected to a tab of the battery (not shown). .
• the pull plate 5 is provided with an air hole 10 reaching the explosion-proof film 8 and a thin-walled welded portion 6 having a thickness smaller than the thickness of the pull plate 5, and the electrical connection point 7 of the explosion-proof film 8 and the pull plate 5 is on the welded portion 6, when the explosion-proof film 8
• the explosion-proof membrane 8 is disconnected from the pull plate 5.
• the central projection 27 of the explosion-proof membrane 8 is provided with a closed annular score 9 and two lines intersecting the closed annular score 9.
• the score 22, the two linear scores 22 are radially distributed around the closed annular score 9, and the pressure of the explosion-proof membrane 8 can be preset by changing the depth of the score, so that it can withstand more than When the pressure is applied, the explosion-proof membrane 8 is broken.
• the explosion-proof battery adopting the above-mentioned cover plate assembly structure comprises a container 1, a battery unit 2 housed in the container 1, a cover plate assembly for sealing the container 1 and drawing current from the battery unit 2, and a cover plate assembly.
• the structure of the battery unit 2 is electrically connected to the pull plate 5, and the upper end opening of the container 1 is connected to the outer side surface of the mounting plate 17.
• the explosion-proof cover plate and the cover plate in the component can be set to be circular, square, etc. to meet the assembly requirements of different shapes of batteries.
• the cylinder forming the cavity may be cylindrical, elliptical, or the like.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Gas Exhaust Devices For Batteries (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=39324108

Family Applications (1)

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Cited By (2)

Families Citing this family (10)

Citations (3)

• 2006
  • 2006-10-27 CN CN2006100221724A patent/CN101170167B/zh not_active Expired - Fee Related
• 2007
  • 2007-03-19 WO PCT/CN2007/000883 patent/WO2008049293A1/zh active Application Filing
• 2008
  • 2008-10-20 HK HK08111571.6A patent/HK1115940A1/xx unknown

Patent Citations (3)

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