Background technology
In recent years, secondary cell (also referred to as rechargeable battery) has been widely used for various portable electric equipments and electronicsIn equipment, such as toy, handheld device etc., this proposes higher and higher requirement to secondary cell energy storage energy.Lithium ion secondaryBattery is due to having the advantages that energy is high, with high power discharge, environmental protection, thus can gradually applying in above field.
The normal work of rechargeable battery is frequently necessary to coordinate with the IC chip of other functions, has reached preferable workMake effect.Usual rechargeable battery is packaged respectively with IC chip, then again by the connection of circuit board and wire, knotIt is combined and uses.So peripheral cell is more, and production process is more, high cost, and rechargeable battery is big with IC chip volume, propertyCan be poor, it is unfavorable for minimizing or is miniaturized.
When lithium rechargeable battery encapsulation is carried out, the space shared by lithium rechargeable battery each several part is all more fixed,Wherein, the electrostrictive polymer core inner then includes anode pole piece, barrier film and cathode pole piece, and in anode pole piece away from barrier filmThe battery core closedtop that one end has specified altitude assignment is packaged, and the certain altitude of the polymer battery core is occupied due to battery core closedtop,So as to reduce the useful space of the electrostrictive polymer core inner.And the space availability ratio and lithium rechargeable battery of polymer battery coreEnergy density and capacity have compared with Important Relations, general, the space availability ratio of the polymer battery core is bigger, the lithium ion secondary electricityThe energy density and capacity in pond are also bigger, therefore, existing lithium rechargeable battery generally existing due to polymer battery coreThe relatively low problem of the energy density and capacity of lithium rechargeable battery caused by low space utilization.
The content of the invention
The invention provides a kind of secondary battery negative pole seal body, the seal body is used to close the making active materials for use in secondary electrochemical electricityThe opening portion of the battery container in pond, wherein the seal body includes：Negative pole cap, circuit board module and sealing ring, the battery caseBody has the circle cable architecture of depression near one end of the negative pole cap at it, and the battery core is positioned in the battery container, positionBetween the positive electrode cap and the circle cable architecture；The circuit board module is located between the circle line and the negative pole cap, instituteThe diameter for stating circuit board module is set between the internal diameter of depression and the internal diameter of battery container that the circle line is constituted, cardIn the circle line side so as to isolate with the battery core；The circuit board module is plastic flexible circuit board, with certain bulletProperty, elastic deformation is produced for being stuck in inside the battery container by the extruding of the sealing ring；The sealing ring is one softProperty and elastic ring insulating blanket, are arranged in the space of the battery container, circuit board module and negative pole cap, for isolatingBattery container and the negative pole cap are stated, negative pole cap, battery container and circuit board module are stated in sealing；The sealing ring and battery containerThe position of interior contact is circular arc, the arc structure for coordinating battery container；The lateral edge of the circuit board module withThe first coating is provided with gap between battery container, the second plating is provided with the circuit board module and the gap of circle lineLayer, second coating extends a segment length along the circuit board module near the surface of the circle line side, with it is describedElectrical contact is realized in positive pole wiring on circuit board module, so as to realize the wiring of the positive pole on the circuit board module and battery containerElectrical contact.
Preferably, the connector between the circuit board module and the negative pole cap is solder.
Preferably, the connector between the circuit board module and the negative pole cap is to snap connection.
Preferably, the edge of the negative pole cap is provided with least two dops, for the negative pole cap to be fixed on into instituteState on circuit board module.
Preferably, the circuit board module is relative to the margin location on the side of the negative pole cap corresponding to the negative pole capInstall and be equipped with least two draw-in grooves, for installing the negative pole cap.
Preferably, the sealing ring is shaped asType,A part be used for extrude permanent circuit plate module inBetween the circle line and the battery container, another part is used to isolate the battery container and the negative pole cap, the sealingThe part for isolating the battery container and the negative pole cap is enclosed, is stretched out and higher than the battery container certain distance, and withThe negative pole cap is flushed, to prevent the battery from short circuit is produced when charging.
Preferably, the material of the coating is conductive metal material.
Preferably, the coating is tin plating.
Preferably, the negative pole cap and circuit board module connecting portion are shaped as " C " type cyclic structure.
Preferably, the battery also includes battery core and positive electrode cap, wherein, the positive electrode cap is connected structure with the battery containerInto the positive pole of the secondary cell；The battery core is positioned in the battery container, positioned at the positive electrode cap and the circuit boardBetween module.
Seal body accessory structure design for electrochemical cell of the invention is ingenious rationally, in electrochemical cell electricityPole sealing part has negative pole cap, and the negative pole cap can cooperatively form shielding construction with circuit board, and the heat produced during work is passedLead to the external world, play a part of protection circuit plate and component.In addition, correspond on the battery container battery core and circuit board itBetween be disposed with circle cable architecture, the relative position for positioning battery core and circuit board, and by sealing ring and tin plating structure by circuitGap sealing between template die block edge and battery container and circle line.
Specific embodiment
By reference to one exemplary embodiment, the purpose of the present invention and function and the side for realizing these purposes and functionMethod will be illustrated.However, the present invention is not limited to one exemplary embodiment as disclosed below；Can by multi-form comeIt is realized.The essence of specification is only to aid in various equivalent modifications Integrated Understanding detail of the invention.
It should be appreciated that foregoing description substantially and follow-up description in detail are exemplary illustration and explanation, should notAs the limitation to claimed content of the invention.
Hereinafter, embodiments of the invention will be described with reference to the drawings.In the accompanying drawings, identical reference represents identicalOr similar part, or same or like step.
The present invention provides a kind of electrochemical secondary cell, and Fig. 1 a, 1b are respectively the structure of electrochemical cell of the invention 100Schematic diagram and decomposition diagram.As shown in Fig. 1 a, 1b, a kind of electrochemical cell 100, including：Battery container 101, it is placed in batteryBattery core 102, negative pole cap 103 in housing 101, the circuit board module 104 in the space being placed between battery core 102 and negative pole cap 103And positive electrode cap 105.Battery container 101 is cased with outside battery core 102, and between positive electrode cap 105 and circuit board module 104.ElectricityPond housing 101 is the box hat of cylinder or rectangular structure, for output cathode, permanent circuit plate module 104.According to the present inventionOne embodiment, positive electrode cap 105 is dextrorsely molded as one structure with the battery container 101, constitutes secondary cell 100Positive pole.
Circuit board module 104 is at least one of which printed circuit board (PCB) (PCB), with the first side and the second side, wherein the first sideNegative pole cap 103 is pointed to relative to the electrochemical cell 100, battery core is pointed in the second side relative to the electrochemical cell 100102.PCB is the circuit board for being printed with wiring pattern thereon, and with the housing inner diameter with the battery 100 have be generally corresponding toSize.Multiple printed conductors and component are arranged in first side or the second side of circuit board module 104.Circuit board module 104Near the side of negative pole cap 103 of the battery 100, between battery core 102 and negative pole cap 103.
Connector is provided with circuit board module 104 so as to negative pole cap 103 is fixed on circuit board module 104, for example,Negative pole cap 103 can be welded on circuit board module 104 by solder, it is also possible to fixed by the mode such as snapping connection.It is preferred thatGround, when being connected using snap, the edge of negative pole cap 103 is provided with least two dops, for negative pole cap 103 to be fixedOn circuit board module 104, and circuit board module 104 relative on the side of negative pole cap 103 corresponding to the negative pole cap 103Marginal position is provided with least two draw-in grooves, for installing negative pole cap 103.The circuit cathode output end of circuit board module 104 setsThe junction in the negative pole cap 103 and circuit board is put, exports negative pole conllinear with circuit ground.
Circuit board module is used for lithium cell charging protection, charging indicates, and can be also used for the discharge prevention of battery, short circuit and protectsShield, Cross prevention and controlled output voltage.Be provided between circuit board module 104 and battery core 102 electrode connecting line 108a and108b, respectively draws the both positive and negative polarity of battery respectively, and wherein 108a is positive lead, and 108b is negative lead.
Fig. 1 c are profiles of Fig. 1 a along A-A directions.Between the battery container 101 of circuit board module 104 and outside, bearSealing ring 106 is provided between polar cap 103 and battery container 101.Sealing ring 106 is a flexible and resilient annular insulation of toolBed course, it can play a part of to isolate the battery container 101 as first electrode and the negative pole cap 103 as second electrode,And because the elastic reaction of sealing ring 106 can extrude and fix circuit board module 104, sealed cell housing 101 and negative poleSpace between cap 103.Specifically, as illustrated in figure 1 c, sealing ring 106 is shaped asType,A part be used for squeezeBetween the circle line 107 and battery container 101, another part is used to isolate the battery case pressure permanent circuit plate module 104Body 101 and the negative pole cap 103.Sealing ring 106 is used to isolate the part of battery container 101 and negative pole cap 103, stretches out and is higher thanThe certain distance of battery container 101, and flushed with negative pole cap 103, to prevent the battery from short circuit is produced when charging.
Preferably, sealing ring 106 and the position of the interior contact of battery container 101 are circular arc, for coordinating battery container101 arc structure.Preferably, circuit board module 104 is plastic flexible circuit board, with certain elasticity, by sealing ring106 extruding produces elastic deformation for being stuck in inside battery container 101.
Position on the outer surface of battery container 101 between correspondence battery core 102 and printed circuit board (PCB) 106 has a circle insideRing-shaped depression, is circle line 107.The battery core 102 is positioned in the battery container 101, positioned at positive electrode cap 105 and the circleBetween the structure of line 107.The setting of sealing ring 106 and circle line 107 causes that circuit board module 104 is fixed on battery container 101Between ring-shaped depression and the bottom of battery container 101, therefore battery container 101 does not need any welding with the connection of negative pole cap 103.
The structure of circle line 107 is provided for positioning circuit plate module 104, specifically, the diameter of circuit board module 104 is bigIt is small to be set between the internal diameter of the ring-shaped depression that circle line 107 is constituted and the internal diameter of battery container 101, when battery is assembled,First battery core 102 is placed into battery container 101, then circuit board module 104 is assembled in battery container 101, circuit boardThe size dimension of module 104 can be stuck in the structure of circle line 107 so as to avoid the contact with battery core 102, then passed through againSealing ring 106 is isolated battery container 101 with negative pole cap 103, completes the assembling of battery 100.Said structure causes electricityRoad plate module 104 has been internally formed a space for closing by the structure of circle line 107 in battery container 101 to be used to accommodate battery core102, such that it is able to increase the volume of battery core 102, therefore increase the capacity of secondary cell.Preferably, battery core 102 is a closed knotStructure, is operated by being connected with corresponding battery plus-negative plate from the inside of battery core 102 its both positive and negative polarity of extraction.
Preferably, above-mentioned circle line 107 is 0.2-1.2mm relative to the depression in the surface depth of battery container 101.
Fig. 2 a diagrammatically illustrate the partial enlargement section view of the seal body accessory 200 for electrochemical cell of the inventionFigure.As shown in Fig. 2 the seal body accessory 200 includes a PCB 201, the 2nd PCB 202, negative pole cap 203.According to this hairBright one embodiment, a PCB 201 and the 2nd PCB 202 are the printed circuit board of area identical two.First PCB201 near battery core 204, and the 2nd PCB 202 is away from battery core 204.First PCB 201 is stuck in battery container by circle line 205On 206.Negative pole cap 203 described in 2nd PCB 202 realizes electrical connection by contacting, and constitutes a shielding construction with it.FirstPCB 201 is disposed with multiple chips or circuit elements near the side of battery core 204 and the 2nd PCB 202 away from the side of battery core 204Device, wherein, the component of radiation can be produced to be arranged in the screen that the 2nd PCB 202 is constituted with negative pole cap 203 in the course of the workIn shield structure.The 2nd PCB 202, the outside of negative pole cap 203 and battery container 206 and between be provided with sealing ring 207.SealingCircle 207 is a flexible and elastic ring insulating blanket, is arranged in the battery container 206, the 2nd PCB 202 and negative pole cap 203Space in, the part of the sealing ring 207 is used to fix a PCB 201 and second under the extruding of battery container 206At circle line 205, another part is used to isolate battery container 206 and negative pole cap 203 PCB 202, seals negative pole cap 203, batterySpace between the PCB 201 and the 2nd PCB 202 of housing 206 and the.Sealing ring 207 and the interior contact of battery container 206Position is circular arc, the arc structure for coordinating battery container 206.
First is provided with gap between first PCB 201 and the lateral edge and battery container 206 of the 2nd PCB 202Coating 210, the second coating 211 is provided with a PCB 201 and the gap of circle line 205, and the second coating 211 is along a PCB201 extend a segment length near the surfaces of the sides of circle line 205, length between 0.5mm~3mm, with a PCB 201 onPositive pole wiring 213 realize electrical contact, so as to realize that the wiring of the positive pole on a PCB 201 213 connects with the electricity of battery container 206Touch, and a PCB 201 and the gap between the edges of the 2nd PCB 202 and battery container 206 and circle line 205 can be sealed.According toSeal body accessory 200 for electrochemical cell of the invention can also be applied to have one piece of feelings of the circuit board module of PCBCondition, as shown in Figure 2 b, the first coating is provided with the gap between the lateral edge and battery container 206 of circuit board module 212210, it is provided with the second coating 211 at circuit board module 212 and the gap of circle line 205.Second coating 211 is along circuit board module212 extend a segment length near the surfaces of the sides of circle line 205, length between 0.5mm~3mm, with circuit board module 212On positive pole wiring 213 realize electrical contact, so as to realize the positive pole on circuit board module 212 wiring 213 with battery container 206Electrical contact.Preferably, the material of coating is good conductive metal material, for example：It is tin plating.By a PCB and the 2nd PCB itBetween through hole 209, the negative lead 208b that battery core 204 is drawn (208a is positive lead, not shown in figure) and firstWire on PCB and the 2nd PCB is connected.The inner surface of through hole 209 is coated with conductive material, for example, copper facing, therefore can will be manyThe wiring of individual circuit board can be linked together by through hole 209, and be connected with the position of negative pole cap and circuit board contacts, so thatConducted to negative pole cap.
Fig. 3 is the sectional exploded view of the seal body accessory 300 for electrochemical cell of the invention.As shown in figure 3, describedSeal body accessory 300 includes negative pole cap 301, sealing ring 302, circuit board module 303.With negative pole cap 301 on circuit board module 303Edge corresponding position be provided with charging indicator light 305.Negative pole cap 301 is shaped as " C " type with the connecting portion of circuit board module 303Cyclic structure, the i.e. edge of negative pole cap has breach 304, and breach 304 is the light admission port of charging indicator light 305, the breach 304With certain height but no more than the height of negative pole cap, it is used to be exposed charging indicator light 305, its position corresponding circuitsThe position of the charging indicator light 305 in plate module 303.Sealing ring 302 is a flexible and elastic ring insulating blanket, can be completeThe light admission port (as shown in Figure 3) of charging indicator light 305 is covered, the material of sealing ring 302 is transparent light conductive material, can make to fillThe light that electric indicator lamp 305 sends is through the sealing ring and causes whole sealing ring printing opacity.
Seal body accessory structure design for electrochemical cell of the invention is ingenious rationally, in electrochemical cell electricityPole sealing part has negative pole cap, and the negative pole cap can cooperatively form shielding construction with circuit board, and the heat produced during work is passedLead to the external world, play a part of protection circuit plate and component.In addition, correspond on the battery container battery core and circuit board itBetween be disposed with circle cable architecture, the relative position for positioning battery core and circuit board, and by sealing ring and tin plating structure by circuitGap sealing between template die block edge and battery container and circle line.
With reference to the explanation of the invention and practice that disclose here, other embodiment of the invention is for those skilled in the artAll will be readily apparent and understand.Illustrate and embodiment is to be considered only as exemplary, true scope of the invention and purport are equalIt is defined in the claims.