WO2019101166A1 - 一种锂离子电池 - Google Patents

一种锂离子电池 Download PDF

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Publication number
WO2019101166A1
WO2019101166A1 PCT/CN2018/117209 CN2018117209W WO2019101166A1 WO 2019101166 A1 WO2019101166 A1 WO 2019101166A1 CN 2018117209 W CN2018117209 W CN 2018117209W WO 2019101166 A1 WO2019101166 A1 WO 2019101166A1
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WO
WIPO (PCT)
Prior art keywords
battery
lithium ion
hole
pole
ion battery
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Application number
PCT/CN2018/117209
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English (en)
French (fr)
Inventor
丁希罕
金明钢
王瑞奔
陈丽霞
叶枭
巩福建
Original Assignee
杭州天丰电源股份有限公司
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Publication of WO2019101166A1 publication Critical patent/WO2019101166A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271Lids or covers for the racks or secondary casings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the invention relates to a lithium ion battery, belonging to the technical field of battery equipment.
  • the batteries of lithium batteries are usually composed of a cylindrical shape, a square shape, etc., and the existing scheme is single or too complicated.
  • the existing cylindrical battery cells have a small single capacity and a large number of series and parallel connections, which is not conducive to the structural arrangement.
  • the existing square batteries have a large single capacity, which is also unfavorable for arrangement.
  • the existing technical solutions are difficult to plan. For a power machine such as a car that requires a large current, it is necessary to connect a plurality of cells in series or in parallel, and connect them with multiple sets of adapter plates or patch cords, without any planned arrangement and connection, which will increase the overall occupation.
  • the Chinese patent discloses a lithium battery module comprising a battery case, the cover plate of the battery case is provided with a positive electrode lead column and a negative electrode lead column, and a casing
  • the first positioning area and the second positioning area are disposed in the housing, and a partition is disposed between the first positioning area and the second positioning area, and the second positioning area is located at the positive and negative conductive electrodes.
  • the first positioning area is provided with a plurality of spaced positioning plates, so that when the plurality of cells are placed in the first positioning area, the two cells are isolated and positioned by the positioning plate, and the number is The cells are spaced from the positive and negative electrode columns to ensure safe use.
  • the above technical solution provides for the isolation and positioning of any two batteries by means of the positioning plate to ensure safe use and convenient heat dissipation, but this solution makes the lithium battery bulky, the battery core is easy to shake, and the side of the battery core does not fit the side wall of the casing. It is easy to have an empty drum.
  • the object of the present invention is to provide a lithium ion with a reasonable layout and a compact structure, which is convenient for the heat dissipation of the battery core group and avoids the hollowing of the battery core, thereby facilitating the safety hazard of the series products. battery.
  • a lithium ion battery comprising a battery core, a battery case for accommodating the battery core, a battery cover covering the battery case, and a battery case for fixing a plurality of A bracket for a battery core, the bracket being a frame structure, the side of which is connected to a pressing plate for pressing the side of the battery core.
  • An end cover is disposed above the bracket, and the end cover is provided with a bus bar area, the bus bar area includes a parallel region for penetrating a plurality of same pole tabs and a series connection for inserting a plurality of positive and negative poles Area.
  • An insulating wall is provided at the boundary between the district and the district.
  • the battery cover is inserted through the pole, the battery cover is fixedly connected to the pole, and the lower end of the pole is connected with a conductor for connecting the electrode holder.
  • the utility model provides a bracket for fixing a plurality of electric cells together, and then is placed together in the battery case, the bracket and the side plate of the battery case are kept at a certain distance to facilitate heat dissipation, and the bracket is a frame structure, so that the heat of the battery core is volatilized in time; Set the pressing plate to press the side of the battery core to avoid emptying the battery core, and the compression plate and the frame are screwed together for easy disassembly. After the battery core is placed on the frame, the pressing plate is mounted on the frame so that the pressing plate can It is closely attached to the side of the battery core, and the structure is practical and the solution is practical.
  • the end cover of the invention arranges the electric cores to be grouped and placed, and the battery core tabs in parallel need to be placed in the parallel region, and the battery core tabs in series need to be placed in the series region, the connection layout of the electric core is planned reasonably, and the insulating wall is set to be electrically connected.
  • the positive and negative poles of the core are isolated to avoid short circuit and make the structure compact.
  • the pole and the battery cover can be integrally injection molded, and the position of the pole is relatively stable compared to the scheme in which the pole is fixed inside the battery, which facilitates the installation of the battery cover, does not need to correct the installation position of the pole, and improves the installation of the battery cover. Accuracy and assembly efficiency.
  • the pole and the electrode holder are provided with an electric conductor. The length of the electric conductor can be flexibly set according to requirements, the installation position of the pole and the electric core can be adjusted, and the distance between the pole and the electrode seat can be set far enough to facilitate heat dissipation.
  • the electrical conductors are respectively screwed to the poles and the electrode holders, and the ductility of the invention is increased compared with the prior art welding, the seismic effect is good, and the joints are not easily broken.
  • the invention is provided with a bracket fixing the battery core group so as to be reliably fixed together without sloshing and empty drum; the end cover is provided to isolate the poles of the battery core group, which can effectively avoid short circuit and safe between the batteries.
  • the bonding together makes the cell layout of the invention reasonable and compact.
  • the pressing plate is a sheet-like structure with a hem, and a plurality of through holes for screwing the frame are disposed around the hem.
  • the main structure of the pressing plate is inserted from the side opening of the frame to abut against the side of the battery core, and the pressing plate can directly abut the side of the battery core, or can be indirectly in contact with the side of the battery core through other protective structures, and the folding edge is convenient. Fixed to the frame.
  • the flange extends to the outer side of the outer surface of the frame, and the two are fixedly connected by the fastening component, so that the inner wall surface of the frame can be kept flat, and the partial extrusion of the battery core can be avoided.
  • the fastening assembly includes a bolt and a nut.
  • the bolt is fixed to the outer surface of the frame, and sequentially passes through the through hole of the flange and the fastening nut matched with the bolt, and the fastening nut screws the pressing plate on the frame. Due to the long bolt length, it is convenient to adjust the tightness of the pressing plate against the battery core, which can be flexibly selected according to needs, the structure is practical, and the concept is ingenious.
  • the insulating wall stands in the busbar area, so that the tabs of different regions can be isolated from each other, and the circuit short circuit can be effectively avoided.
  • the insulating wall is arranged transversely along the boundary area, and includes a transversely disposed transverse insulating wall and a longitudinally disposed longitudinal insulating wall.
  • the transverse insulating wall is centrally arranged along the end cap, dividing the end cap into two.
  • the longitudinal insulating wall extends from a side of the lateral insulating wall to an edge of the end cap to form the bus bar area. Different regions are pierced with different tabs to determine the installation position of the cells, which makes the cell layout reasonable and improves the installation efficiency of the cells.
  • the intermediate position of the lateral insulating wall is provided with a base for mounting a circuit board, and electrode blocks for connecting the tabs are disposed at both ends.
  • a threaded cylinder for screwing the circuit board is disposed around the base.
  • the electrode holder end portion is provided with a mounting hole for screwing the electric conductor.
  • the base and the electrode holder are respectively a sheet-like structure, and cannot be effectively screwed with other components, so the threaded cylinder is provided. Or the nut member is screwed with other components, and the structure is simple and practical.
  • the electric conductor has a sheet shape, and two through holes are respectively formed at two ends thereof, and the through hole includes a first through hole for screwing the pole and a second through hole for screwing the electrode holder.
  • the fastener passes through the through hole of the electric conductor and is screwed to the pole and the electrode seat respectively, so that the connection of the three is more reliable, the earthquake resistance is good, and the failure is not easy.
  • the battery cover is also a casing, and the battery cover is fastened in the battery case.
  • the first through hole is pierced from below.
  • a fastener the second through hole is provided with a second fastener from above, which solves the problem that the electrical conductor is not easy to install and fix.
  • the battery cover is provided with a through hole in the adjacent pole, and the second fastener sequentially passes through the through hole and the second through hole to screw the electric conductor on the electrode holder.
  • the tightening tool passes through the through hole, and the fastener is tightened on the connecting nut of the electrode holder, so that the electric conductor is fixed on the electrode holder.
  • a protection circuit module for preventing overcharging and overdischarging is further included, and one end of the protection circuit module is connected to the electrical conductor, and the other end is connected to the electrode holder to prevent the external power source from overcharging the battery core. Damage to the battery.
  • the protection circuit module is provided with an over-discharge prevention member at the same time. When the voltage of the battery core is too low, the over-discharge prevention member is disconnected, the discharge circuit is broken, the external discharge is stopped, and the service life of the battery core is prolonged.
  • the protection circuit module can adopt the Seiko lithium battery protection IC-S8211D series circuit chip, the circuit chip has an overcharge and overdischarge protection mechanism, and the technology is mature, easy to purchase, can reduce the research and development cost, and reduce the manufacturing cost of the invention.
  • the electrical conductor opens a fuse portion that can be blown by an excessive current, and the width of the fuse portion is smaller than the width of the conductor body structure.
  • the fuse is arranged on the electric conductor.
  • the present invention has the following beneficial effects:
  • the utility model provides a bracket for fixing a plurality of electric cells together, and then is placed together in the battery case, the bracket and the side plate of the battery case are kept at a certain distance to facilitate heat dissipation, and the bracket is a frame structure, so that the heat of the battery core is volatilized in time; Set the pressing plate to press the side of the battery core to avoid emptying the battery core, and the compression plate and the frame are screwed together for easy disassembly. After the battery core is placed on the frame, the pressing plate is mounted on the frame so that the pressing plate can It is closely attached to the side of the battery core, and the structure is easy to achieve a series of products, the structure is practical, and the scheme is practical.
  • the end cover of the invention arranges the electric cores to be grouped and placed, and the battery core tabs in parallel need to be placed in the parallel region, and the battery core tabs in series need to be placed in the series region, the connection layout of the electric core is planned reasonably, and the insulating wall is set to be electrically connected.
  • the positive and negative poles of the core are isolated to avoid short circuit and make the structure compact.
  • the pole and the battery cover can be integrally injection molded, and the position of the pole is relatively stable compared to the scheme in which the pole is fixed inside the battery, which facilitates the installation of the battery cover, does not need to correct the installation position of the pole, and improves the installation of the battery cover. Accuracy and assembly efficiency.
  • the pole and the electrode holder are provided with an electric conductor. The length of the electric conductor can be flexibly set according to requirements, the installation position of the pole and the electric core can be adjusted, and the distance between the pole and the electrode seat can be set far enough to facilitate heat dissipation.
  • the electrical conductors are respectively screwed to the poles and the electrode holders, and the ductility of the invention is increased compared with the prior art welding, the seismic effect is good, and the joints are not easily broken.
  • the invention is provided with a bracket fixing the battery core group so as to be reliably fixed together without sloshing and emptying the drum; the end cover is provided to isolate the poles of the battery core group, which can effectively avoid short circuit of the circuit, has no safety hazard, and is electrically The cores can be safely attached together, so that the cell layout of the invention is reasonable and compact.
  • Figure 1 is a schematic view of the overall structure of the present invention
  • FIG. 2 is a schematic structural view of a battery cell
  • FIG. 3 is a schematic structural view of a certain angle of the present invention.
  • Figure 4 is a schematic structural view of a stent of the present invention.
  • Figure 5 is a schematic view showing the orientation of the structure of the stent of the present invention.
  • Figure 6 is a schematic structural view of an end cap of the present invention.
  • Figure 7 is a schematic view showing the assembly of the end cover, the bracket and the battery core of the present invention.
  • Figure 8 is a schematic view showing the back structure of the end cap of the present invention.
  • Figure 9 is a schematic view showing the front structure of the battery cover of the present invention.
  • Figure 10 is a schematic view showing the back structure of the battery cover of the present invention.
  • Figure 11 is a schematic view showing the structure of the battery cover of the present invention converted to a certain angle
  • 13 is a structural diagram of an embodiment of providing protection against overcharging and overdischarging according to the present invention.
  • Figure 14 is a structural view showing another embodiment of the electrode holder of the present invention.
  • a lithium ion battery includes a battery cell 4, a battery case 2 for accommodating the battery cells 4, and a battery cover 1 covering the battery case 2.
  • a bracket 3 for fixing a plurality of cells 4 is mounted in the battery case 2, and the frame 3 is a frame 31 structure, and a side surface thereof is connected to a pressing plate 32 for pressing the side surface 42 of the battery core.
  • An end cover 5 is disposed above the bracket 3, and the end cover 5 is provided with a bus bar area, and the bus bar area includes a parallel area A for penetrating a plurality of the same pole tabs 44 and a plurality of positive holes for The series region B of the negative electrode tab 44; an insulating wall is provided at the boundary between the region and the region.
  • the battery cover 1 is inserted through the pole, the battery cover 1 is fixedly connected to the pole, and the lower end of the pole is connected with a conductor 14 for connecting the electrode holder 55.
  • a battery cover 1 is disposed above the battery case 2, and the battery core 4 includes a battery core surface 41, a battery core side surface 42, and a battery core end surface 43.
  • the mounting bracket 3 of the present invention fixes the plurality of battery cells 4 together, and then is placed together in the battery case 2.
  • the bracket 3 is kept at a certain distance from the side plates of the battery case 2 to facilitate heat dissipation, and the bracket 3 is a frame 31 structure, which is convenient for electricity.
  • the heat of the core 4 is volatilized in time; the pressing plate 32 is pressed to press the side of the battery core 4 to prevent the battery core 4 from being hollowed, and the pressing plate 32 and the frame 31 are screwed for convenient disassembly, and after the battery core 4 is placed in the frame,
  • the pressing plate 32 is attached to the frame 31 so that the pressing plate 32 can be closely attached to the side surface of the battery core 4, and the structure is practical and the solution is practical.
  • the end cover 5 of the present invention sets the cells 4 in groups, and the cells 4 of the cells 4 in parallel need to be placed in the parallel region A, and the cells 4 of the cells 4 in series need to be placed in the series region B, and the cells 4 are reasonably planned. Connect the layout, and set the insulating wall to isolate the positive and negative poles of the cell 4 to avoid short circuit.
  • the pole and the battery cover 1 can be integrally injection molded, and the position of the pole is relatively stable compared to the scheme in which the pole is fixed inside the battery, which facilitates the installation of the battery cover 1, does not need to correct the installation position of the pole, and improves the battery cover. 1 installation accuracy and assembly efficiency.
  • the poles and the electrode holders 55 are provided with the electric conductors 14.
  • the length of the electric conductors 14 can be flexibly set according to requirements, and the mounting positions of the poles and the electric cores 4 are adjustable, and the poles and the electrode holders 55 can be disposed far apart to facilitate heat dissipation.
  • the conductors 14 are respectively screwed to the poles and the electrode holders 55, and the ductility of the present invention is increased compared with the prior art welding, the earthquake resistance is good, and the joints are not easily broken.
  • the structure of the bracket 3 of the present invention is provided with an upper tab 34 on the upper surface of the bracket 3, which is attached to the end cover 5, and the end cover 5 is provided for a plurality of holes.
  • the tab 44 of the tab 44 is channeled 53.
  • the lower surface of the frame 31 is provided with a support plate 33, and the support plate 33 defines a floor through slot 53331 for weight reduction and heat dissipation.
  • the front and rear end faces of the frame 31 are respectively connected to a horizontally placed H-shaped plate 35, and the H-shaped plate 35 is attached to the upper end portion of the frame 31.
  • the upper surface of the support plate 33 is connected to a gasket for adhering to the lower surface of the battery core 4.
  • the lower end portion of the frame 31 is provided with an outwardly extending connecting piece 36, and the connecting piece 36 is provided with a connecting hole that is screwed to the battery case 2.
  • the pressing plate 32 is a sheet-like plate with a flange 321 , and a plurality of through holes for screwing the frame 31 are disposed around the flange 321 .
  • the flange 321 extends to the outside of the outer surface of the frame 31, and the two are fixedly connected by a fastening assembly comprising a bolt 351 and a fastening nut 352 that mates with the bolt.
  • the length of the bolt 351 is greater than the sum of the thickness of the fastening nut 352 and the thickness of the flange 321 , and is fixed to the outer surface of the frame 31 , and sequentially passes through the through hole of the flange 321 , the fastening nut 352 , and the fastening nut 352 .
  • the pressure plate 32 is screwed onto the frame 31.
  • the adjacent pressing plate 32 is provided with a protective pad for adhering to the side surface 42 of the battery core.
  • the protective pad is located between the pressing plate and the side of the battery core, so that the side of the battery core can be uniformly stressed to avoid local stress.
  • the series region B of the end cover 5 includes a positive electrode portion through which a plurality of positive electrode tabs are disposed, and a negative electrode portion through which a plurality of negative electrode tabs are disposed.
  • a tandem portion 54 is provided between the positive electrode portion and the negative electrode portion.
  • the series region B and the parallel region A respectively define a through slot 53 for penetrating the tab 44.
  • the through slot 53 has a narrow lower end and a narrow upper end for facilitating the insertion of the tab 44 while the tab 44 passes through. In the future, the tabs 44 can be effectively limited.
  • the number of the through grooves 53 of the series region B is twice the number of the through grooves 53 of the parallel region A.
  • the end cover 5 is an insulating sheet-like material, and a connecting hole for screwing the upper tab 34 is formed at the periphery thereof.
  • the insulating wall stands in the busbar area.
  • the insulating wall is arranged horizontally and vertically along the boundary area, and comprises a transversely disposed transverse insulating wall 52 and a longitudinally disposed longitudinal insulating wall 51, the transverse insulating wall 52 being centrally arranged along the end cover 5, dividing the end cover 5 into two;
  • the longitudinal insulating wall 51 extends from the side of the lateral insulating wall 52 to the edge of the end cover 5 to form the bus bar area.
  • a pedestal 542 for mounting a circuit board is disposed at an intermediate position of the lateral insulating wall 52, and electrode holders 55 for connecting the tabs are disposed at both ends.
  • a threaded cylinder 541 for screwing a circuit board is disposed around the base 542; a nut member 551 for screwing the conductor 14 is disposed at an end of the electrode holder 55.
  • the nut member 551 is mounted on the lower surface of the end of the electrode holder 55.
  • the end of the electrode holder 55 defines a through hole, and the threaded hole of the nut member 551 coincides with the vertical projection of the through hole.
  • the battery cover 1 of the present invention has a threaded hole at the bottom of the pole of the battery cover 1, and is connected with a conductor 14 for connecting the electrode holder 55.
  • the conductor 14 is a sheet structure.
  • the material of manufacture is copper alloy.
  • the pole column includes a positive electrode lead column and a negative electrode lead column protruding from an upper end surface of the battery cover 1.
  • the vertical projection of the pole does not coincide with the vertical projection of the electrode holder 55, and the two maintain a certain distance, so that the heat dissipation is good.
  • the electric conductors 14 are arranged along a horizontal direction, and two through holes are respectively formed at the two ends thereof.
  • the through holes include a first through hole 141 for screwing the pole and a second through hole 142 for screwing the electrode holder 55. .
  • the first through hole 141 is provided with a first fastener 151 from below, and the second through hole 142 is provided with a second fastener 152 from above.
  • the battery cover 1 is provided with a through hole 11 adjacent to the pole, and the second fastener 152 sequentially passes through the through hole 11 and the second through hole 142 to screw the electric conductor 14 on the electrode holder 55 of the battery core 4.
  • An insulating cap 13 is disposed at an upper end of the through hole 11 , and a fixing insert 111 for screwing the second fastener 152 is disposed at a lower end thereof.
  • the fixing insert 111 may be a nut, and the second fastener 152 is corresponding. Model hex socket.
  • the electrode holder 55 can simultaneously connect the tabs 44 of the plurality of cells 4 to increase the output power of the cells 4, the electrode holder 55 is provided with a connection nut, and the second fastener 152 and the second through hole 142 are provided. And the vertical projections of the coupling nuts coincide.
  • the conductor 14 is formed with a fuse portion 143 that can be blown by an excessive current.
  • the width of the fuse portion 143 is smaller than the width of the main body structure of the conductor 14.
  • the size of the fuse portion 143 can be determined according to actual needs.
  • the fuse portion 143 is disposed on the electric conductor 14. When the pole and the electrode holder 55 are overloaded for a long time, more heat is generated, and the temperature of the electric conductor 14 is increased. When the temperature reaches a certain level, the fuse portion 143 is blown and the pole is broken. The connection of the post and the electrode holder 55 protects the entire circuit.
  • the present invention provides an anti-overcharge and over-discharge protection embodiment: the electrode holder 55 is connected to a protection circuit module 6 via a conductive plate 7, and the protection circuit module 6 is provided with a MOS tube member 61 connected to the conductor 14. Prevent the battery from charging all the time.
  • the external power source is connected to the pole 12, and the current sequentially passes through the charging circuit formed by the pole 12, the conductor 14, the protection circuit module 6, the conductive plate 7, the electrode holder 55, and the tab 44, thereby charging the battery core 4, when When the battery cell 4 is fully charged, the MOS tube member 61 automatically cuts off the circuit, and the charging circuit is disconnected, preventing the external power source from overcharging the battery cell 4 and damaging the battery cell 4.
  • the protection circuit module 6 can also be provided with an over-discharge prevention member. When the voltage of the battery cell 4 is too low, the over-discharge prevention member is disconnected, the discharge circuit is broken, and the external discharge is stopped.
  • the protection circuit module 6 can adopt the Seiko lithium battery protection IC-S8211D series circuit chip, the circuit chip has an overcharge and overdischarge protection mechanism, and the technology is mature, easy to purchase, can reduce the research and development cost, and reduce the manufacturing cost of the invention. .
  • FIG. 14 An embodiment of the mounting structure of the electrode holder and the conductive plate of the present invention is as shown in FIG. 14.
  • the electrode holder 55 is provided with a cavity 552, and an inner nut 553 is disposed inside the cavity 552, and the inner nut 553 and the seat are disposed.
  • the cavity 552 is fixed or movably connected, and the conductive plate 7 is placed on the upper surface of the electrode holder 55.
  • the bolt member 71 sequentially passes through the upper surface of the conductive plate 7 and the cavity 552, and is screwed into the inner nut 553, and then the conductive plate 7 and the end cover 5 are Can be connected securely.
  • the orientation of the inner nut 553 and the mounting position can be flexibly set as needed.

Abstract

一种锂离子电池,属于电池设备技术领域,其包括电芯(4)、用于容纳电芯(4)的电池壳(2)、盖在电池壳(2)上方的电池盖(1),电池壳(2)内安装一用于固定多个电芯(4)的支架(31)。所述电池盖(1)穿设极柱(12),所述电池盖(1)与所述极柱(12)固定连接,极柱(12)下端连接一用于连接电极座(55)的导电体(14)。通过设置支架固定电芯组,使其可靠的固定在一起,不会晃动以及空鼓;设置端盖对电芯组的极耳进行隔离,能有效避免电路短路,并且电芯之间可以安全的贴合在一起,使得电芯布局合理、结构紧凑;解决了现有电池散热效果差,电芯容易发生空鼓的技术问题。

Description

一种锂离子电池 技术领域
本发明涉及一种锂离子电池,属于电池设备技术领域。
背景技术
目前市场上的应用于车辆启动的锂电池较少,锂电池的电芯通常由圆柱形、方形等组成,现有方案结构单一或过于复杂。现有圆柱形电芯单颗容量小,串并联数量很多,不利于结构安排。而现有方形电芯单颗容量又偏大,同样不利于安排。尤其是针对系列产品,现有技术方案均难以规划。对于汽车之类需要大电流的动力机械而言,即需要串联或并联多个电芯,并以多组转接板或转接线进行连接,而没有规划的排列及连接方式,会增加整体所占用的空间,并且难以达成系列产品,生产成本也会提高。并且,此类电池要求启动电流很大,瞬时功率大,电芯之间连接方式采用转接板连接,锂电池的充放电过程中,会产生较多热量,热量不能及时散发,即有可能会融化相关的保护结构,导致电路短路,存在一定的安全隐患。
为解决上述问题,中国专利(申请号CN201220146826.5)公开了一种锂电池模组,包括一电池壳,电池壳的盖板上设有正极导电极柱与负极导电极柱,而一壳体结合于盖板的底端,壳体内设有第一定位区及第二定位区,第一定位区及第二定位区之间设有隔板,且该第二定位区位于正、负极导电极柱的下方,而该第一定位区设有数个具间隔的定位板,借以在数个电芯置放于第一定位区内时,借助该定位板隔离定位任二个电芯,并使数个电芯与正、负极导电极柱形成一定间距,以确保使用安全。
上述技术方案设置借助定位板隔离定位任二个电芯,确保使用安全,同时便于散热,但是这种方案使得锂电池体积庞大,电芯容易晃动,电芯侧面不与壳体侧壁相贴合,容易发生空鼓。
发明内容
针对现有技术的缺陷,本发明的目的在于提供一种电芯组布局合理,结构紧凑的便于电芯组散热的避免电芯发生空鼓的结构便于达成系列产品的不存在安全隐患的锂离子电池。
为实现上述目的,本发明的技术方案为:一种锂离子电池,包括电芯、用于容纳电芯的电池壳、盖在电池壳上方的电池盖,电池壳内安装一用于固定多个电芯的支架,所述支架为框架结构,其侧面连接一用于压紧电芯侧面的压紧板。
所述支架上方架设一端盖,所述端盖设置汇流排区,所述汇流排区包括用于穿设多个同 极极耳的并联区和用于穿设多个正、负极极耳的串联区。区与区的分界处设置绝缘墙。
所述电池盖穿设极柱,所述电池盖与所述极柱固定连接,极柱下端连接一用于连接电极座的导电体。
本发明设置支架把多个电芯固定在一起,进而一同放置于电池壳中,支架与电池壳的侧板保持一定距离,便于散热,同时支架为框架结构,便于电芯的热量及时挥发出来;设置压紧板压紧电芯的侧面,避免电芯空鼓,压紧板和框架螺接,方便拆卸,当电芯放置框架后,再把压紧板安装于框架上,使得压紧板能够与电芯的侧面紧密贴合,结构实用,方案切实。
本发明设置端盖把电芯进行分组放置,需要并联的电芯极耳放置于并联区,需要串联的电芯极耳放置于串联区,合理规划电芯的连接布局,同时设置绝缘墙对电芯的正负极进行隔离,避免电路短路,使其结构紧凑。
所述极柱与电池盖可一体注塑成型,相比极柱固定于电池内部的方案,极柱的位置相对稳定,便于电池盖的安装,不需要校正极柱安装位置,提高了电池盖的安装精度和装配效率。极柱与电极座设置导电体,导电体的长度可根据需要灵活设置,极柱与电芯的安装位置可调,极柱与电极座间隔可设置较远,便于散热。导电体分别与极柱和电极座螺接,相比现有技术的焊接,增加本发明的延展性,抗震效果好,连接处不容易失效。
本发明设置支架固定电芯组,使其可靠的固定在一起,不会晃动以及空鼓;设置端盖对电芯组的极耳进行隔离,能有效避免电路短路,并且电芯之间可以安全的贴合在一起,使得本发明电芯布局合理、结构紧凑。
作为优选技术措施,所述压紧板为带有折边的片状结构,所述折边周边设置多个用于螺接框架的通孔。压紧板主体结构从框架的侧面洞口中置入,抵触于电芯的侧面,压紧板可以直接抵触电芯的侧面,也可以通过其他保护结构,间接抵触于电芯侧面,设置折边便于与框架相固定。
作为优选技术措施,由于电芯怕局部挤压,所述折边延伸至框架外表面的外侧,两者通过紧固组件固定连接,能够保持框架的内壁面平整,避免局部挤压电芯,所述紧固组件包括螺栓、螺母。
作为优选技术措施,所述螺栓固定于框架的外表面,并依次穿设折边的通孔和与螺栓相配套的紧固螺母,紧固螺母把压紧板拧紧在框架上。由于螺栓长度较长,便于调整压紧板抵触电芯的松紧度,可根据需要灵活选择,结构实用,构思巧妙。
作为优选技术措施,所述绝缘墙矗立于汇流排区,使得不同区域的极耳能够彼此隔离,能够有效避免电路短路。绝缘墙沿分界区域横纵布置,其包括横向布置的横向绝缘墙和纵向 布置的纵向绝缘墙。
作为优选技术措施,所述横向绝缘墙沿着端盖居中布置,把端盖一分为二。所述纵向绝缘墙从横向绝缘墙侧面延伸至端盖边缘,形成所述汇流排区。不同的区域穿设不同的极耳,进而确定电芯的安装位置,使得电芯布局合理,提高电芯的安装效率。
作为优选技术措施,所述横向绝缘墙中间位置设有用于安装电路板的基座,两端设置设有用于连接极耳的电极座。所述基座四周设置用于螺接电路板的螺纹柱体。所述电极座端部设置用于螺接导电体的安装孔,为节省材料以及减少占用空间,基座和电极座分别为片状结构,无法与其他零部件有效螺接,因此设置螺纹柱体或螺母件与其他零部件进行螺接,结构简单、实用。
作为优选技术措施,所述导电体呈片状,其两端分别开设通孔,所述通孔包括用于螺接极柱的第一通孔和用于螺接电极座的第二通孔,紧固件穿过导电体的通孔分别螺接极柱和电极座,使其三者的连接更加可靠,抗震效果好,不易失效。
作为优选技术措施,由于电芯的电极座放置于电池壳中,电池盖也是一个壳体,电池盖扣合于电池壳中,为了能安装导电体,所述第一通孔从下方穿设第一紧固件,第二通孔从上方穿设第二紧固件,解决了导电体不易安装固定的难题。所述电池盖相邻极柱设置穿设孔,第二紧固件依次穿过穿设孔和第二通孔,将导电体拧紧在电极座上。拧紧工具穿过穿设孔,带动紧固件拧紧在电极座的连接螺母上,进而实现导电体固定于电极座上。
作为优选技术措施,还包括一用于防止过充、过放电的保护电路模块,所述保护电路模块一端与导电体相连接,另一端与电极座相连接,防止外部电源对电芯过充,损坏电芯。保护电路模块同时设置防过放电件,当电芯电压过低时,防过放电件断开,放电电路断路,停止对外放电,延长电芯的使用寿命。所述保护电路模块可采用精工锂电池保护IC-S8211D系列电路芯片,所述电路芯片具有过充电、过放电保护机制,并且技术成熟,便于采购,能够降低研发成本,减少本发明的制造成本。
所述导电体开设遇到过大电流能够熔断的保险部,所述保险部的宽度小于导电体主体结构的宽度。在导电体上设置保险部,当极柱与电极座长时间过载后,会产生较多热量,导电体的温度升高,当温度达到一定程度,保险部熔断,断开极柱和电极座的连接,保护整个电路。
与现有技术相比,本发明具有以下有益效果:
本发明设置支架把多个电芯固定在一起,进而一同放置于电池壳中,支架与电池壳的侧板保持一定距离,便于散热,同时支架为框架结构,便于电芯的热量及时挥发出来;设置压 紧板压紧电芯的侧面,避免电芯空鼓,压紧板和框架螺接,方便拆卸,当电芯放置框架后,再把压紧板安装于框架上,使得压紧板能够与电芯的侧面紧密贴合,结构便于达成系列产品,结构实用,方案切实。
本发明设置端盖把电芯进行分组放置,需要并联的电芯极耳放置于并联区,需要串联的电芯极耳放置于串联区,合理规划电芯的连接布局,同时设置绝缘墙对电芯的正负极进行隔离,避免电路短路,使其结构紧凑。
所述极柱与电池盖可一体注塑成型,相比极柱固定于电池内部的方案,极柱的位置相对稳定,便于电池盖的安装,不需要校正极柱安装位置,提高了电池盖的安装精度和装配效率。极柱与电极座设置导电体,导电体的长度可根据需要灵活设置,极柱与电芯的安装位置可调,极柱与电极座间隔可设置较远,便于散热。导电体分别与极柱和电极座螺接,相比现有技术的焊接,增加本发明的延展性,抗震效果好,连接处不容易失效。
本发明设置支架固定电芯组,使其可靠的固定在一起,不会晃动以及空鼓;设置端盖对电芯组的极耳进行隔离,能有效避免电路短路,不存在安全隐患,并且电芯之间可以安全的贴合在一起,使得本发明电芯布局合理、结构紧凑。
附图说明
图1为本发明整体结构示意图;
图2为电芯的结构示意图;
图3为本发明转换一定角度的结构示意图;
图4为本发明支架结构示意图;
图5为本发明支架结构面方位示意图;
图6为本发明端盖结构示意图;
图7为本发明端盖与支架、电芯装配示意图;
图8为本发明端盖背面结构示意图;
图9为本发明电池盖正面结构示意图;
图10为本发明电池盖背面结构示意图;
图11为本发明电池盖转换一定角度的结构示意图;
图12为本发明导电体结构示意图;
图13为本发明设置防过充、过放电保护实施例结构示图;
图14为本发明电极座另一种实施例结构示图。
附图标记说明:
1-电池盖,2-电池壳,3-支架,4-电芯,5-端盖,6-保护电路模块,7-导电板,11-穿设孔,12-极柱,13-绝缘盖帽,14-导电体,111-固定镶件,141-第一通孔,142-第二通孔,143-保险部,151-第一紧固件,152-第二紧固件,31-框架,32-压紧板,33-支撑板,34-上接片,35-H形板,36-连接片,321-折边,351-螺栓,352-紧固螺母,331-底板通槽,41-电芯表面,42-电芯侧面,43-电芯端面,44-极耳,51-纵向绝缘墙,52-横向绝缘墙,53-通槽,54-串接部,542-基座,541-螺纹柱体,55-电极座,551-螺母件,552-座腔,553-内固螺母,A-并联区,B-串联区,61-MOS管件,71-螺栓件。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
相反,本发明涵盖任何由权利要求定义的在本发明的精髓和范围上做的替代、修改、等效方法以及方案。进一步,为了使公众对本发明有更好的了解,在下文对本发明的细节描述中,详尽描述了一些特定的细节部分。对本领域技术人员来说没有这些细节部分的描述也可以完全理解本发明。
需要说明的是,当元件被称为“固定于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。相反,当元件被称作“直接在”另一元件“上”时,不存在中间元件。本文所使用的术语“垂直的”、“水平的”以及类似的表述只是为了说明的目的。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文所使用的术语只是为了描述具体的实施例的目的,不是旨在限制本发明。
如图1-12所示,一种锂离子电池,包括电芯4、用于容纳电芯4的电池壳2、盖在电池壳2上方的电池盖1。
电池壳2内安装一用于固定多个电芯4的支架3,所述支架3为框架31结构,其侧面连接一用于压紧电芯侧面42的压紧板32。
所述支架3上方架设一端盖5,所述端盖5设置汇流排区,所述汇流排区包括用于穿设多个同极极耳44的并联区A和用于穿设多个正、负极极耳44的串联区B;区与区的分界处设置绝缘墙。
所述电池盖1穿设极柱,所述电池盖1与所述极柱固定连接,极柱下端连接一用于连接电极座55的导电体14。
所述电池壳2上方罩设一电池盖1,所述电芯4包括电芯表面41、电芯侧面42、电芯端面43。
本发明设置支架3把多个电芯4固定在一起,进而一同放置于电池壳2中,支架3与电池壳2的侧板保持一定距离,便于散热,同时支架3为框架31结构,便于电芯4的热量及时挥发出来;设置压紧板32压紧电芯4的侧面,避免电芯4空鼓,压紧板32和框架31螺接,方便拆卸,当电芯4放置框架后,再把压紧板32安装于框架31上,使得压紧板32能够与电芯4的侧面紧密贴合,结构实用,方案切实。
本发明设置端盖5把电芯4进行分组放置,需要并联的电芯4极耳44放置于并联区A,需要串联的电芯4极耳44放置于串联区B,合理规划电芯4的连接布局,同时设置绝缘墙对电芯4的正负极进行隔离,避免电路短路。
所述极柱与电池盖1可一体注塑成型,相比极柱固定于电池内部的方案,极柱的位置相对稳定,便于电池盖1的安装,不需要校正极柱安装位置,提高了电池盖1的安装精度和装配效率。极柱与电极座55设置导电体14,导电体14的长度可根据需要灵活设置,极柱与电芯4的安装位置可调,极柱与电极座55间隔可设置较远,便于散热。导电体14分别与极柱和电极座55螺接,相比现有技术的焊接,增加本发明的延展性,抗震效果好,连接处不容易失效。
如图4-5所示本发明支架3结构实施例,所述支架3的框架31上表面设置上接片34,其与端盖5相贴合,所述端盖5开设若干用于穿设极耳44的极耳44通槽53。所述框架31下表面设有一支撑板33,所述支撑板33开设用于减重、散热的底板通槽53331。所述框架31前、后端面分别连接一横放的H形板35,所述H形板35安装于框架31上端部。所述支撑板33上表面连接一用于与电芯4下表面相贴合的垫片。所述框架31下端部设有外伸的连接片36,所述连接片36设有与电池壳2的螺接的连接孔。
所述压紧板32为带有折边321的片状板材,所述折边321周边设置多个用于螺接框架31的通孔。所述折边321延伸至框架31外表面的外侧,两者通过紧固组件固定连接,所述紧固组件包括螺栓351和与螺栓相配套的紧固螺母352。所述螺栓351长度大于紧固螺母352的厚度和折边321的厚度之和,其固定于框架31的外表面,并依次穿设折边321的通孔、紧固螺母352,紧固螺母352把压紧板32拧紧在框架31上。相邻压紧板32设有用于与电芯侧面42相贴合的保护垫,保护垫位于压紧板和电芯侧面之间,使得电芯侧面能够均 匀受力,避免局部受力。
如图6-8所示本发明端盖5结构实施例,所述端盖5的串联区B包括穿设多个正极极耳的正极部、穿设多个负极极耳的负极部,所述正极部与负极部之间设有串接部54。所述串联区B和并联区A分别开设用于穿设极耳44的通槽53,所述通槽53的口径下端宽,上端窄,便于穿设极耳44,同时当极耳44穿过以后,能够有效限位极耳44。所述串联区B的通槽53个数是并联区A的通槽53个数的2倍。
所述端盖5为绝缘的片状材料,其周边开设用于螺接上接片34的连接孔。所述绝缘墙矗立于汇流排区。绝缘墙沿分界区域横纵布置,其包括横向布置的横向绝缘墙52和纵向布置的纵向绝缘墙51,所述横向绝缘墙52沿着端盖5居中布置,把端盖5一分为二;所述纵向绝缘墙51从横向绝缘墙52侧面延伸至端盖5边缘,形成所述汇流排区。
所述横向绝缘墙52中间位置设有用于安装电路板的基座542,两端设置设有用于连接极耳的电极座55。所述基座542四周设置用于螺接电路板的螺纹柱体541;所述电极座55端部设置用于螺接导电体14的螺母件551。所述螺母件551安装于电极座55端部的下表面,电极座55端部开设通孔,所述螺母件551的螺纹孔与所述通孔的竖向投影重合。
如图9-12所示本发明电池盖1结构实施例,电池盖1的极柱底部开设螺纹孔,其连接一用于连接电极座55的导电体14,所述导电体14为片状结构,其制造材料为铜合金。所述极柱包括正极导电极柱、负极导电极柱,其凸出于电池盖1上端面。
所述极柱的竖向投影与电极座55的竖向投影不重合,两者保持一定距离,使其散热性好。所述导电体14沿着水平方向布置,其两端分别开设通孔,所述通孔包括用于螺接极柱的第一通孔141和用于螺接电极座55的第二通孔142。所述第一通孔141从下方穿设第一紧固件151,第二通孔142从上方穿设第二紧固件152。所述电池盖1相邻极柱设置穿设孔11,第二紧固件152依次穿过穿设孔11和第二通孔142,将导电体14拧紧在电芯4的电极座55上。所述穿设孔11上端设置一绝缘盖帽13,其下端设置用于螺接第二紧固件152的固定镶件111,所述固定镶件111可以为螺母,第二紧固件152为对应型号的内六角螺丝柱。所述电极座55可以同时连接多个电芯4的极耳44,增大电芯4的输出功率,所述电极座55设置连接螺母,所述第二紧固件152和第二通孔142以及连接螺母的竖直投影相重合。
所述导电体14开设遇到过大电流能够熔断的保险部143,所述保险部143的宽度小于导电体14主体结构的宽度,保险部143的尺寸可根据实际需要确定。在导电体14上设置保险部143,当极柱与电极座55长时间过载后,会产生较多热量,导电体14的温度升高,当 温度达到一定程度,保险部143熔断,断开极柱和电极座55的连接,保护整个电路。
如图13所示本发明设置防过充、过放电保护实施例:电极座55通过一导电板7连接一保护电路模块6,所述保护电路模块6设置MOS管件61与导电体14相连接,防止电芯一直充电。外部电源与极柱12相连接,电流依次经过极柱12、导电体14、保护电路模块6、导电板7、电极座55、极耳44形成的充电电路,进而对电芯4进行充电,当电芯4充满电时,MOS管件61自动切断电路,充电电路断路,防止外部电源对电芯4过充,损坏电芯4。保护电路模块6也可以设置防过放电件,当电芯4电压过低时,防过放电件断开,放电电路断路,停止对外放电。所述保护电路模块6可采用精工锂电池保护IC-S8211D系列电路芯片,所述电路芯片具有过充电、过放电保护机制,并且技术成熟,便于采购,能够降低研发成本,减少本发明的制造成本。
如图14所示本发明电极座与导电板一种安装结构实施例:所述电极座55设置座腔552,所述座腔552内部设置一内固螺母553,所述内固螺母553与座腔552固定或活动连接,导电板7放置于电极座55上表面,螺栓件71依次穿过导电板7、座腔552上表面,拧紧在内固螺母553中,进而导电板7与端盖5能够牢固连接。内固螺母553的朝向以及安装位置可根据需要灵活设置。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种锂离子电池,包括电芯(4)、用于容纳电芯(4)的电池壳(2)、盖在电池壳(2)上方的电池盖(1),其特征在于,电池壳(2)内安装一用于固定多个电芯(4)的支架(3),所述支架(3)为框架(31)结构,其侧面连接一用于压紧电芯(4)侧面的压紧板(32);
    所述支架(3)上方架设一端盖(5),所述端盖(5)设置汇流排区,所述汇流排区包括用于穿设多个同极极耳(44)的并联区(A)和用于穿设多个正、负极极耳(44)的串联区(B);区与区的分界处设置绝缘墙;
    所述电池盖(1)穿设极柱(12),所述电池盖(1)与所述极柱(12)固定连接,极柱(12)下端连接一用于连接电极座(55)的导电体(14)。
  2. 如权利要求1所述的一种锂离子电池,其特征在于,所述压紧板(32)为带有折边(321)的片状结构,所述折边(321)周边设置多个用于螺接框架(31)的通孔。
  3. 如权利要求2所述的一种锂离子电池,其特征在于,所述折边(321)延伸至框架(31)外表面的外侧,两者通过紧固组件固定连接,所述紧固组件包括螺栓(351)和与螺栓相配套的紧固螺母(352)。
  4. 如权利要求3所述的一种锂离子电池,其特征在于,所述螺栓(351)固定于框架(31)的外表面,并依次穿设折边(321)的通孔、紧固螺母,紧固螺母把压紧板(32)拧紧在框架(31)上。
  5. 如权利要求1-4任一项所述的一种锂离子电池,其特征在于,所述绝缘墙矗立于汇流排区,绝缘墙沿分界区域横纵布置,其包括横向布置的横向绝缘墙(52)和纵向布置的纵向绝缘墙(51)。
  6. 如权利要求5所述的一种锂离子电池,其特征在于,所述横向绝缘墙(52)沿着端盖(5)居中布置,把端盖(5)一分为二;所述纵向绝缘墙(51)从横向绝缘墙(52)侧面延伸至端盖(5)边缘,形成所述汇流排区。
  7. 如权利要求6所述的一种锂离子电池,其特征在于,所述横向绝缘墙(52)中间位置设有用于安装电路板的基座(542),两端设置设有用于连接极耳的电极座(55);所述基座(542)四周设置用于螺接电路板的螺纹柱体(541);所述电极座(55)端部设置安装孔。
  8. 如权利要求1-4任一项所述的一种锂离子电池,其特征在于,所述导电体(14)呈片状,其两端分别开设通孔,所述通孔包括用于螺接极柱(12)的第一通孔(141)和用于螺接电极座(55)的第二通孔(142)。
  9. 如权利要求8所述的一种锂离子电池,其特征在于,所述第一通孔(141)从下方穿设第 一紧固件(151),第二通孔(142)从上方穿设第二紧固件(152);所述电池盖(1)相邻极柱(12)设置穿设孔(11),第二紧固件(152)依次穿过穿设孔(11)和第二通孔(142),将导电体(14)拧紧在电极座(55)上。
  10. 如权利要求9所述的一种锂离子电池,其特征在于,还包括一用于防止过充的保护电路模块(6),所述保护电路模块(6)一端与导电体(14)相连接,另一端与电极座相连接(55);所述导电体(14)开设遇到过大电流能够熔断的保险部(143),所述保险部(143)的宽度小于导电体主体结构的宽度。
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