CN111987257A - Overcharge-prevention lithium ion battery pack and preparation process thereof - Google Patents
Overcharge-prevention lithium ion battery pack and preparation process thereof Download PDFInfo
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- CN111987257A CN111987257A CN202010884402.8A CN202010884402A CN111987257A CN 111987257 A CN111987257 A CN 111987257A CN 202010884402 A CN202010884402 A CN 202010884402A CN 111987257 A CN111987257 A CN 111987257A
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses an overcharge-prevention lithium ion battery pack and a preparation process thereof, wherein the overcharge-prevention lithium ion battery pack comprises a parallel seat, a parallel groove, a resistance sheet groove, a lithium battery, a thermistor body, a conduction elastic sheet, an elastic sheet groove, a positive electrode parallel guide sheet, a negative electrode parallel guide sheet, a guide sheet groove, a discharge input port, a charge output port, a battery protection plate, a plate groove, a discharge output port, a charge input port, a positioning hole, a positioning column, a rubber gasket, an insulating cover plate, a rubber gasket, an insulating shell, a protective shell and a protective cover plate; the invention adds the thermistor body with increased resistance after absorbing heat, the phase-change cutoff charging circuit and the battery protection board to charge and protect the lithium batteries connected in parallel, so that the battery pack has the function of preventing overcharge, the problems of increased internal pressure, heat generation and even fire generation of the batteries in the battery pack are avoided, the capacity attenuation of the battery pack is prevented, the performance of the battery pack is improved, the potential safety hazard of the battery pack is reduced, and the service life of the battery pack is prolonged.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to an overcharge-preventing lithium ion battery pack and a preparation process thereof.
Background
The lithium ion battery pack refers to a power supply formed by connecting a plurality of lithium ion batteries in series or in parallel, and is widely applied in daily life. The parallel battery packs can provide stronger current, the voltage of each battery is required to be the same, the output voltage is equal to the voltage of one battery, and the battery packs are connected in parallel; the series battery can provide higher voltage without excessive requirements.
However, most of the conventional lithium ion batteries have the following problems: firstly, the battery pack does not have an overcharge prevention function, and after multiple charging and discharging, an overshoot fault is easy to occur, so that the problems of battery internal pressure rise, heating and even fire and the like occur in the battery pack, the capacity attenuation of the battery pack is caused, the performance of the battery pack is reduced, certain potential safety hazards exist, and the service life of the battery pack is shortened; secondly, the protection performance is poor, the battery pack is easily damaged by external force in the using process, the problems of battery bulging deformation, electrolyte leakage and the like occur, explosion is easy to occur, resources are wasted, and the environment is polluted; thirdly, the electronic elements are mostly connected in a welding mode, so that the electronic elements are inconvenient to disassemble after assembly, time and labor are wasted, the maintenance and replacement difficulty of the electronic elements is inevitably improved, and the maintenance cost of the battery pack is increased.
Disclosure of Invention
The invention aims to provide an overcharge-prevention lithium ion battery pack and a preparation process thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a prevent overcharge lithium ion battery group, includes parallelly connected seat, parallel groove, hinders the piece groove, lithium cell, thermistor body, switches on the shell fragment, bullet piece groove, recess, lug, the parallelly connected guide piece of positive pole, the parallelly connected guide piece of negative pole, guide piece groove, discharge input port, the output port that charges, battery protection board, board groove, discharge output port, charge input port, locating hole, reference column, rubber gasket, insulating cover plate, rubber packing ring, insulating casing, protective housing, screw, protective cover plate, discharge hole and charge hole, the both sides at parallelly connected seat top center are through parallelly connected groove and piece groove respectively evenly inlaying and are equipped with six lithium cells and thermistor body, the negative pole of lithium cell contacts with one side of thermistor body, and the positive pole of lithium cell and the opposite side of thermistor body all contact with one side of switching on the shell fragment, the shell fragment that switches on passes through bullet piece groove, The groove and the bump are uniformly embedded on two sides of the inner edge of the top of the parallel seat, the other side of the conducting elastic sheet is respectively contacted with the side surface of one end of the positive parallel guide sheet and the side surface of one end of the negative parallel guide sheet, the positive parallel guide sheet and the negative parallel guide sheet are respectively embedded on two sides of the outer edge of the top of the parallel seat through the guide sheet groove, the other ends of the positive parallel guide sheet and the negative parallel guide sheet are respectively sleeved with a discharge input port and a charge output port, the discharge input port and the charge output port are respectively and fixedly welded on two corners of the top end of one side of the battery protection board, the battery protection board is embedded on one adjacent side of the outer edge of the top of the parallel seat through the board groove, and the two; the top of the parallel seat is respectively embedded with a rubber gasket and an insulating cover plate through a positioning hole and a positioning column from bottom to top, the bottom of the parallel seat is sleeved with the rubber gasket through a boss, the rubber gasket, the parallel seat and the rubber gasket are respectively embedded in the center of the top of the insulating shell from bottom to top, the outer edge of the top of the insulating shell is contacted with the outer edge of the bottom of the insulating cover plate, the insulating shell and the insulating cover plate are respectively embedded in the center of the side face of the protective shell, the outer edge of the side face of the protective shell is fixedly connected with the outer edge of the side face of the protective cover plate through a screw hole and a screw, and the top end and the bottom end of the side face of the protective cover plate.
A preparation process of an overcharge-prevention lithium ion battery pack comprises the following steps: step one, stamping; step two, injection molding; step three, die casting; step four, tapping; step five, assembling;
in the first step, a proper amount of copper foil is placed into a cutting machine, a projection and a copper foil strip in a prefabricated shape are respectively cut, then the copper foil strip is placed into a punching machine, a conducting elastic sheet, a positive electrode parallel guide sheet and a negative electrode parallel guide sheet in the prefabricated shape are respectively punched, and the projection is welded on the conducting elastic sheet by using an electric welding pen;
pouring a proper amount of plastic materials into an injection molding machine, performing hot melting to form a liquid state, injecting the liquid state into a mold in a prefabricated shape, respectively forming a parallel seat with a parallel groove, a resistance sheet groove, a spring sheet groove, a guide sheet groove, a plate groove, a charging hole, a discharging hole and a positioning column, an insulating cover plate with a positioning hole and an insulating shell with the charging hole and the discharging hole, pouring a proper amount of rubber materials into the injection molding machine, performing hot melting to form a liquid state, injecting the liquid state into the mold in the prefabricated shape, and respectively forming a rubber gasket and a rubber gasket with the positioning hole;
pouring a proper amount of aluminum alloy material into a die casting machine in the third step, performing hot melting to form a liquid state, injecting the liquid state into a mold with a prefabricated shape, and respectively forming a protective shell and a protective cover plate with a charging hole and a discharging hole;
in the fourth step, the protective shell and the protective cover plate which are manufactured in the third step are respectively tapped by a tapping machine, and a screw hole in a prefabricated shape is drilled;
in the fifth step, the parallel seat prepared in the second step is placed on an assembly table, the lithium battery and the thermistor body prefabricated by the known process are respectively embedded into the parallel groove and the resistance groove, the conduction elastic sheet with the convex block, the positive electrode parallel guide sheet and the negative electrode parallel guide sheet prepared in the first step are respectively embedded into the elastic sheet groove, the groove and the guide sheet groove, the prefabricated battery protection plate with the discharge input port, the charge output port, the discharge output port and the charge input port is embedded into the plate groove, the rubber gasket is sleeved at the bottom of the parallel seat, the rubber gasket and the insulation cover plate are covered at the top of the parallel seat by embedding the positioning column into the positioning hole, the rubber gasket, the parallel seat and the rubber gasket are embedded into the insulation shell, the insulation cover plate is covered at the top of the insulation shell, and the insulation cover plate and the insulation shell are finally embedded into the protective shell, through embedding prefabricated screw in the screw, make the protection apron lid in protective housing's side, and then make discharge output port, charge the input port and imbed respectively in discharging hole and the hole of charging, make and prevent overcharging lithium ion battery group.
According to the technical scheme, the discharge output port and the charge input port are respectively embedded in the discharge hole and the charge hole, and the number of the discharge hole and the number of the charge hole are three and are respectively arranged on two sides of the top end of the side face of the parallel seat, the insulating shell and the protective cover plate.
According to the technical scheme, the parallel connection grooves are provided with six, the six parallel connection grooves are respectively and uniformly arranged on one side of the center of the top of the parallel connection seat, one side of each parallel connection groove is communicated with one side of the corresponding resistance sheet groove, the six resistance sheet grooves are respectively and uniformly arranged on the other side of the center of the top of the parallel connection seat, and the other sides of the resistance sheet grooves and the other sides of the parallel connection grooves are respectively communicated with one side of the elastic sheet groove.
According to the technical scheme, twelve elastic sheet grooves are arranged and are respectively arranged on two sides of the inner edge of the top of the parallel seat, and the other side of each elastic sheet groove is communicated with one side of the side face of the guide sheet groove.
According to the technical scheme, the number of the grooves is twenty four, the grooves are respectively formed in two adjacent sides of the elastic sheet groove, the protrusions are embedded in the grooves, and the protrusions are respectively fixedly welded to the top ends of two adjacent sides of the conductive elastic sheet.
According to the technical scheme, eight positioning holes are formed and are respectively arranged at the four corners of the tops of the rubber gasket and the insulating cover plate, positioning columns are embedded in the positioning holes, and four positioning columns are arranged and are respectively provided with the four corners of the tops of the parallel seats.
According to the technical scheme, the number of the screw holes is eight, the screw holes are respectively arranged at four corners of the side face of the protective shell and the four corners of the side face of the protective cover plate, the screws are embedded in the screw holes, and the number of the screws is four.
Compared with the prior art, the invention has the following beneficial effects: the invention adds the thermistor body, increases the resistance between the lithium battery and the negative electrode parallel guide sheet after absorbing the heat of the lithium battery, and cuts off the charging circuit by changing phases, thereby matching with the battery protection board to charge and protect the parallel lithium battery, so that the battery pack obtains the function of preventing overcharge, the problems of rise of internal pressure of the battery in the battery pack, heating and even firing are avoided, the attenuation of the capacity of the battery pack is prevented, the performance of the battery pack is improved, the potential safety hazard of the battery pack is reduced, and the service life of the battery pack is prolonged; the rubber gasket, the insulating cover plate, the rubber gasket, the insulating shell, the protective shell and the protective cover plate are arranged, so that double protection is provided for the lithium batteries connected in parallel, the protection performance of the battery pack is improved, external force damage in the using process of the battery pack is reduced, the problems of battery bulging deformation and electrolyte leakage are avoided, the explosion risk of the battery pack is reduced, and the electrolyte resource is saved; the conduction elastic sheet, the discharge input port and the charge output port are additionally arranged, and the traditional fixed welding method is replaced by the elastic connection method, so that the battery pack is convenient to assemble and disassemble by personnel, time and labor are saved, the maintenance and replacement difficulty of electronic elements is reduced, and the maintenance cost of the battery pack is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a perspective view of the overall construction of the present invention;
FIG. 2 is an exploded view of the overall structure of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is a perspective view of the whole structure of the conductive spring plate of the present invention;
fig. 6 is a perspective view showing the overall structure of a battery protection plate according to the present invention;
FIG. 7 is a process flow diagram of the present invention;
in the figure: 1. a parallel seat; 2. parallel connection grooves; 3. a sheet blocking groove; 4. a lithium battery; 5. a thermistor body; 6. conducting the elastic sheet; 7. a spring sheet groove; 8. a groove; 9. a bump; 10. the positive electrode is connected with a guide sheet in parallel; 11. the negative electrode is connected with a guide sheet in parallel; 12. a guide slot; 13. a discharge input port; 14. a charging output port; 15. a battery protection plate; 16. a plate groove; 17. a discharge output port; 18. a charging input port; 19. positioning holes; 20. a positioning column; 21. a rubber gasket; 22. an insulating cover plate; 23. a rubber gasket; 24. an insulating housing; 25. a protective housing; 26. a screw hole; 27. a screw; 28. a protective cover plate; 29. a discharge hole; 30. and a charging hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: an overcharge-proof lithium ion battery pack comprises a parallel seat 1, a parallel groove 2, a resistance sheet groove 3, a lithium battery 4, a thermistor body 5, a conducting elastic sheet 6, an elastic sheet groove 7, a groove 8, a bump 9, an anode parallel guide sheet 10, a cathode parallel guide sheet 11, a guide sheet groove 12, a discharge input port 13, a charge output port 14, a battery protection plate 15, a plate groove 16, a discharge output port 17, a charge input port 18, a positioning hole 19, a positioning column 20, a rubber gasket 21, an insulating cover plate 22, a rubber gasket 23, an insulating shell 24, a protective shell 25, a screw hole 26, a screw 27, a protective cover plate 28, a discharge hole 29 and a charge hole 30, wherein six lithium batteries 4 and thermistor bodies 5 are respectively and uniformly embedded on two sides of the center of the top of the parallel seat 1 through the parallel groove 2 and the resistance sheet groove 3, six parallel grooves 2 are respectively and uniformly arranged on one side of the center of the top of, one side of the parallel groove 2 is communicated with one side of the resistance sheet groove 3, six resistance sheet grooves 3 are arranged and are respectively and uniformly arranged on the other side of the center of the top of the parallel seat 1, the other side of the resistance sheet groove 3 and the other side of the parallel groove 2 are respectively communicated with one side of the elastic sheet groove 7, the negative electrode of the lithium battery 4 is contacted with one side of the thermistor body 5, the positive electrode of the lithium battery 4 and the other side of the thermistor body 5 are respectively contacted with one side of the conduction elastic sheet 6, the conduction elastic sheet 6 is uniformly embedded on two sides of the inner edge of the top of the parallel seat 1 through the elastic sheet groove 7, the groove 8 and the lug 9, twelve elastic sheet grooves 7 are respectively arranged on two sides of the inner edge of the top of the parallel seat 1, twenty four grooves 8 are respectively arranged on two adjacent sides of the elastic sheet groove 7, the inner part of the groove 8 is embedded with the lug 9, twenty four lugs 9 are respectively and are fixedly welded on the, the other side of the spring plate groove 7 is communicated with one side of the guide plate groove 12, the other side of the conducting spring plate 6 is respectively contacted with the side of one end of the positive electrode parallel guide plate 10 and the negative electrode parallel guide plate 11, the positive electrode parallel guide plate 10 and the negative electrode parallel guide plate 11 are respectively embedded on two sides of the outer edge of the top of the parallel seat 1 through the guide plate groove 12, the other end of the positive electrode parallel guide plate 10 and the negative electrode parallel guide plate 11 are respectively sleeved with the discharge input port 13 and the charge output port 14, the discharge input port 13 and the charge output port 14 are respectively fixedly welded on two corners of the top end of one side of the battery protection plate 15, the battery protection plate 15 is embedded on one adjacent side of the outer edge of the top of the parallel seat 1 through the plate groove 16, the two corners of the top end of the other side of the battery protection plate 15 are respectively fixedly welded with the discharge output port 17 and the, the three discharging holes 29 and the three charging holes 30 are respectively arranged at two sides of the top ends of the side surfaces of the parallel seat 1, the insulating shell 24 and the protective cover plate 28, the top of the parallel seat 1 is respectively embedded with the rubber gasket 21 and the insulating cover plate 22 from bottom to top through the positioning hole 19 and the positioning column 20, the positioning hole 19 is eight and is respectively arranged at four corners of the top of the rubber gasket 21 and the insulating cover plate 22, the positioning column 20 is embedded in the positioning hole 19, the four positioning columns 20 are four and are respectively provided with four corners of the top of the parallel seat 1, the bottom of the parallel seat 1 is sleeved with the rubber gasket 23 through a boss, the rubber gasket 23, the parallel seat 1 and the rubber gasket 21 are respectively embedded in the center of the top of the insulating shell 24 from bottom to top, the outer edge of the top of the insulating shell 24 is contacted with the outer edge of the bottom of the insulating cover plate 22, and the insulating, the outer edge of the side surface of the protective shell 25 is fixedly connected with the outer edge of the side surface of the protective cover plate 28 through screw holes 26 and screws 27, eight screw holes 26 are formed and are respectively arranged at four corners of the side surfaces of the protective shell 25 and the protective cover plate 28, the screws 27 are embedded in the screw holes 26, four screws 27 are arranged, and the top end and the bottom end of the center of the side surface of the protective cover plate 28 are respectively contacted with the side surfaces of the insulating cover plate 22 and the insulating shell 24.
Referring to fig. 7, the present invention provides a technical solution: a preparation process of an overcharge-prevention lithium ion battery pack comprises the following steps: step one, stamping; step two, injection molding; step three, die casting; step four, tapping; step five, assembling;
in the first step, a proper amount of copper foil is placed into a cutting machine, a prefabricated-shaped bump 9 and a copper foil strip are respectively cut, then the copper foil strip is placed into a punching machine, a prefabricated-shaped conduction elastic sheet 6, a prefabricated-shaped anode parallel guide sheet 10 and a prefabricated-shaped cathode parallel guide sheet 11 are respectively punched, and the bump 9 is welded on the conduction elastic sheet 6 by using an electric welding pen;
in the second step, pouring a proper amount of plastic material into an injection molding machine, after the plastic material is melted into liquid, injecting the plastic material into a mold with a prefabricated shape, respectively molding the parallel seat 1 with the parallel groove 2, the resistance sheet groove 3, the elastic sheet groove 7, the groove 8, the guide sheet groove 12, the plate groove 16, the charging hole 30, the discharging hole 29 and the positioning column 20, the insulating cover plate 22 with the positioning hole 19 and the insulating shell 24 with the charging hole 30 and the discharging hole 29, then pouring a proper amount of rubber material into the injection molding machine, after the rubber material is melted into liquid, injecting the rubber material into the mold with the prefabricated shape, and respectively molding the rubber gasket 23 and the rubber gasket 21 with the positioning hole 19;
pouring a proper amount of aluminum alloy material into a die casting machine in the third step, performing hot melting to form a liquid state, injecting the liquid state into a mold with a prefabricated shape, and respectively forming a protective shell 25 and a protective cover plate 28 with a charging hole 30 and a discharging hole 29;
in the fourth step, the protective shell 25 and the protective cover plate 28 which are manufactured in the third step are respectively tapped by a tapping machine, and a screw hole 26 with a prefabricated shape is drilled;
in the fifth step, the parallel seat 1 prepared in the second step is placed on an assembly table, the lithium battery 4 and the thermistor body 5 prefabricated by the known process are respectively embedded into the parallel groove 2 and the resistance groove 3, the conducting elastic sheet 6 with the convex block 9, the positive electrode parallel guide sheet 10 and the negative electrode parallel guide sheet 11 prepared in the first step are respectively embedded into the elastic sheet groove 7, the groove 8 and the guide sheet groove 12, the prefabricated battery protection plate 15 with the discharge input port 13, the charge output port 14, the discharge output port 17 and the charge input port 18 is embedded into the plate groove 16, the rubber gasket 23 is sleeved at the bottom of the parallel seat 1, the positioning column 20 is embedded into the positioning hole 19, the rubber gasket 21 and the insulating cover plate 22 are covered at the top of the parallel seat 1, and the rubber gasket 21, the parallel seat 1 and the rubber gasket 23 are embedded into the insulating shell 24, the insulation cover plate 22 is covered on the top of the insulation shell 24, finally, the insulation cover plate 22 and the insulation shell 24 are embedded into the protective shell 25, the prefabricated screws 27 are embedded into the screw holes 26, the protective cover plate 28 is covered on the side surface of the protective shell 25, and the discharge output port 17 and the charge input port 18 are respectively embedded into the discharge hole 29 and the charge hole 30, so that the anti-overcharging lithium ion battery pack is manufactured.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the thermistor body 5 is additionally arranged between the lithium battery 4 and the negative parallel guide piece 11, the resistance between the lithium battery 4 and the negative parallel guide piece 11 is increased after the heat of the lithium battery 4 is absorbed, and a charging circuit is cut off by changing the phase, so that the parallel lithium battery 4 is charged and protected by matching with the battery protection plate 15, the battery pack obtains an overcharge prevention function, the problems of rise of internal pressure of the battery in the battery pack, heating and even fire are avoided, the attenuation of the capacity of the battery pack is prevented, the performance of the battery pack is improved, the potential safety hazard of the battery pack is reduced, and the service life of the battery pack is prolonged; the rubber gasket 21, the insulating cover plate 22, the rubber gasket 23, the insulating shell 24, the protective shell 25 and the protective cover plate 28 are arranged to provide double protection for the lithium batteries 4 connected in parallel, so that the protection performance of the battery pack is improved, the external force damage in the use process of the battery pack is reduced, the problems of battery bulging deformation and electrolyte leakage are avoided, the explosion risk of the battery pack is reduced, and the electrolyte resource is saved; the conducting elastic sheet 6, the discharging input port 13 and the charging output port 14 are additionally arranged, and the traditional fixed welding method is replaced by an elastic connection method, so that the battery pack is convenient to assemble and disassemble by personnel, time and labor are saved, the maintenance and replacement difficulty of electronic elements is reduced, and the maintenance cost of the battery pack is reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An overcharge-prevention lithium ion battery pack comprises a parallel seat (1), a parallel groove (2), a resistance sheet groove (3), a lithium battery (4), a thermistor body (5), a conduction elastic sheet (6), an elastic sheet groove (7), a groove (8), a bump (9), a positive electrode parallel guide sheet (10), a negative electrode parallel guide sheet (11), a guide sheet groove (12), a discharge input port (13), a charge output port (14) and a battery protection plate (15), plate groove (16), discharge output port (17), input port (18) of charging, locating hole (19), reference column (20), rubber gasket (21), insulating cover plate (22), rubber packing ring (23), insulating casing (24), protecting sheathing (25), screw (26), screw (27), protecting cover plate (28), discharge hole (29) and hole (30) of charging, its characterized in that: six lithium batteries (4) and a thermistor body (5) are respectively and uniformly embedded on two sides of the center of the top of the parallel seat (1) through a parallel groove (2) and a resistance groove (3), the negative electrode of the lithium battery (4) is contacted with one side of the thermistor body (5), the positive electrode of the lithium battery (4) and the other side of the thermistor body (5) are respectively contacted with one side of a conduction elastic sheet (6), the conduction elastic sheet (6) is uniformly embedded on two sides of the inner edge of the top of the parallel seat (1) through an elastic sheet groove (7), a groove (8) and a convex block (9), the other side of the conduction elastic sheet (6) is respectively contacted with the side surface of one end of a positive electrode parallel guide sheet (10) and a negative electrode parallel guide sheet (11), the positive electrode parallel guide sheet (10) and the negative electrode parallel guide sheet (11) are respectively embedded on two sides of the outer edge of the top of the parallel seat (1) through a guide sheet groove (12), the other ends of the positive electrode parallel guide sheet (10) and the negative electrode parallel guide sheet (11) are respectively sleeved with a discharge input port (13) and a charge output port (14), the discharge input port (13) and the charge output port (14) are respectively fixedly welded at two corners of the top end of one side of the battery protection plate (15), the battery protection plate (15) is embedded at one adjacent side of the outer edge of the top of the parallel seat (1) through a plate groove (16), and the two corners of the top end of the other side of the battery protection plate (15) are respectively fixedly welded with a discharge output port (17) and a charge input port (18); the top of the parallel seat (1) is respectively embedded with a rubber gasket (21) and an insulating cover plate (22) from bottom to top through a positioning hole (19) and a positioning column (20), the bottom of the parallel seat (1) is sleeved with a rubber gasket (23) through a boss, the rubber gasket (23), the parallel seat (1) and the rubber gasket (21) are respectively embedded in the center of the top of the insulating shell (24) from bottom to top, the outer edge of the top of the insulating shell (24) is contacted with the outer edge of the bottom of the insulating cover plate (22), and the insulating shell (24) and the insulating cover plate (22) are embedded in the center of the side surface of the protective shell (25), the outer edge of the side surface of the protective shell (25) is fixedly connected with the outer edge of the side surface of the protective cover plate (28) through a screw hole (26) and a screw (27), the top end and the bottom end of the side center of the protective cover plate (28) are respectively contacted with the side surfaces of the insulating cover plate (22) and the insulating shell (24).
2. A preparation process of an overcharge-prevention lithium ion battery pack comprises the following steps: step one, stamping; step two, injection molding; step three, die casting; step four, tapping; step five, assembling; the method is characterized in that:
in the first step, a proper amount of copper foil is placed into a cutting machine, a prefabricated-shaped bump (9) and a copper foil strip are respectively cut, then the copper foil strip is placed into a punching machine, a prefabricated-shaped conduction elastic sheet (6), a positive electrode parallel guide sheet (10) and a negative electrode parallel guide sheet (11) are respectively punched, and the bump (9) is welded on the conduction elastic sheet (6) by using an electric welding pen;
pouring a proper amount of plastic materials into an injection molding machine, performing hot melting to form a liquid state, injecting the liquid state into a mold with a prefabricated shape, respectively forming a parallel seat (1) with a parallel groove (2), a sheet resistance groove (3), a spring sheet groove (7), a groove (8), a guide sheet groove (12), a plate groove (16), a charging hole (30), a discharging hole (29) and a positioning column (20), an insulating cover plate (22) with a positioning hole (19) and an insulating shell (24) with the charging hole (30) and the discharging hole (29), then pouring a proper amount of rubber materials into the injection molding machine, performing hot melting to form a liquid state, injecting the liquid state into the mold with the prefabricated shape, and respectively forming a rubber gasket (23) and a rubber gasket (21) with the positioning hole (19);
pouring a proper amount of aluminum alloy material into a die casting machine in the third step, performing hot melting to form a liquid state, injecting the liquid state into a mold with a prefabricated shape, and respectively forming a protective shell (25) and a protective cover plate (28) with a charging hole (30) and a discharging hole (29);
in the fourth step, the protective shell (25) and the protective cover plate (28) which are manufactured in the third step are respectively tapped by a tapping machine, and a screw hole (26) with a prefabricated shape is drilled;
in the fifth step, the parallel seat (1) prepared in the second step is placed on an assembly table, a lithium battery (4) and a thermistor body (5) which are prefabricated by a known process are respectively embedded into the parallel groove (2) and the resistance sheet groove (3), then the conducting elastic sheet (6) with the convex block (9), the positive electrode parallel guide sheet (10) and the negative electrode parallel guide sheet (11) prepared in the first step are respectively embedded into the elastic sheet groove (7), the groove (8) and the guide sheet groove (12), a prefabricated battery protection plate (15) with a discharge input port (13), a charge output port (14), a discharge output port (17) and a charge input port (18) is embedded into the plate groove (16), then a rubber gasket (23) is sleeved at the bottom of the parallel seat (1), and a positioning column (20) is embedded into the positioning hole (19), so that a rubber gasket (21) and an insulating cover plate (22) are covered at the top of the parallel seat (1), and then embedding the rubber gasket (21), the parallel seat (1) and the rubber gasket (23) into an insulating shell (24), covering the insulating cover plate (22) on the top of the insulating shell (24), finally embedding the insulating cover plate (22) and the insulating shell (24) into a protective shell (25), embedding a prefabricated screw (27) into a screw hole (26), covering a protective cover plate (28) on the side surface of the protective shell (25), and embedding the discharge output port (17) and the charge input port (18) into a discharge hole (29) and a charge hole (30) respectively to manufacture the overcharge-proof lithium ion battery pack.
3. The anti-overcharge lithium ion battery pack of claim 1, wherein: the discharging output port (17) and the charging input port (18) are respectively embedded in the discharging hole (29) and the charging hole (30), the number of the discharging holes (29) and the number of the charging holes (30) are three, and the discharging holes and the charging holes are respectively arranged on two sides of the top end of the side face of the parallel seat (1), the insulating shell (24) and the protective cover plate (28).
4. The anti-overcharge lithium ion battery pack of claim 1, wherein: parallel connection groove (2) are provided with six, evenly set up respectively in one side at parallel connection seat (1) top center, and one side of parallel connection groove (2) all with the one side intercommunication that hinders piece groove (3), it is provided with six to hinder piece groove (3), evenly set up respectively at the opposite side at parallel connection seat (1) top center, and the opposite side that hinders piece groove (3) and parallel connection groove (2) communicates with one side of bullet piece groove (7) respectively.
5. The anti-overcharge lithium ion battery pack of claim 1, wherein: twelve elastic sheet grooves (7) are respectively arranged at two sides of the inner edge of the top of the parallel seat (1), and the other side of each elastic sheet groove (7) is communicated with one side of the side surface of the guide sheet groove (12).
6. The anti-overcharge lithium ion battery pack of claim 1, wherein: the spring piece groove structure is characterized in that the number of the grooves (8) is twenty four, the grooves are respectively arranged on two adjacent sides of the spring piece groove (7), the inner portions of the grooves (8) are embedded with the protruding blocks (9), the protruding blocks (9) are twenty four, and the protruding blocks are respectively fixedly welded on the top ends of two adjacent sides of the conductive spring piece (6).
7. The anti-overcharge lithium ion battery pack of claim 1, wherein: the positioning holes (19) are eight in number and are respectively arranged at four corners of the tops of the rubber gaskets (21) and the insulating cover plate (22), positioning columns (20) are embedded in the positioning holes (19), four positioning columns (20) are arranged, and four corners of the tops of the parallel seats (1) are respectively arranged.
8. The anti-overcharge lithium ion battery pack of claim 1, wherein: the number of the screw holes (26) is eight, the screw holes are respectively arranged at four corners of the side face of the protective shell (25) and four corners of the side face of the protective cover plate (28), screws (27) are embedded in the screw holes (26), and the number of the screws (27) is four.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010884402.8A CN111987257B (en) | 2020-08-28 | 2020-08-28 | Overcharge-prevention lithium ion battery pack and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010884402.8A CN111987257B (en) | 2020-08-28 | 2020-08-28 | Overcharge-prevention lithium ion battery pack and preparation process thereof |
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| CN111987257B CN111987257B (en) | 2022-06-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005005162A (en) * | 2003-06-12 | 2005-01-06 | Toshiba Battery Co Ltd | Charger of secondary battery |
| CN203760534U (en) * | 2013-11-20 | 2014-08-06 | 北京科易动力科技有限公司 | Battery module |
| WO2016121357A1 (en) * | 2015-01-30 | 2016-08-04 | 三洋電機株式会社 | Battery pack |
| CN109830628A (en) * | 2019-03-28 | 2019-05-31 | 珠海博杰电子股份有限公司 | Battery case |
| CN211125747U (en) * | 2019-12-26 | 2020-07-28 | 天津力神特种电源科技股份公司 | But parallelly connected box of portable battery of hot plug |
-
2020
- 2020-08-28 CN CN202010884402.8A patent/CN111987257B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005005162A (en) * | 2003-06-12 | 2005-01-06 | Toshiba Battery Co Ltd | Charger of secondary battery |
| CN203760534U (en) * | 2013-11-20 | 2014-08-06 | 北京科易动力科技有限公司 | Battery module |
| WO2016121357A1 (en) * | 2015-01-30 | 2016-08-04 | 三洋電機株式会社 | Battery pack |
| CN109830628A (en) * | 2019-03-28 | 2019-05-31 | 珠海博杰电子股份有限公司 | Battery case |
| CN211125747U (en) * | 2019-12-26 | 2020-07-28 | 天津力神特种电源科技股份公司 | But parallelly connected box of portable battery of hot plug |
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| Publication number | Publication date |
|---|---|
| CN111987257B (en) | 2022-06-17 |
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