CN1842930A - Cylindrical cell and manufacturing method thereof - Google Patents
Cylindrical cell and manufacturing method thereof Download PDFInfo
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- CN1842930A CN1842930A CNA2004800247418A CN200480024741A CN1842930A CN 1842930 A CN1842930 A CN 1842930A CN A2004800247418 A CNA2004800247418 A CN A2004800247418A CN 200480024741 A CN200480024741 A CN 200480024741A CN 1842930 A CN1842930 A CN 1842930A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
A cylindrical cell includes; a group of electrode plates (5); a positive electrode collector (10) welded to a core protrusion of the positive electrode in the group of electrode plates (5); a negative electrode collector (11) having a plurality of projections (12) protruding to the lower surface and having the upper surface welded to a core protrusion of the negative electrode in the group of electrode plates (5); a metal case (7) containing the group of electrode plates(5) having the welded positive/negative electrode collectors (10, 11) with the negative electrode collector (11) downward and the projections (12) of the negative electrode (11) welded to the inner bottom surface; electrolytic liquid contained in the metal case (7); and a sealing body (9) electrically insulated from the metal case (7) and sealing the upper portion of the metal case (7). The projections (12) of the negative electrode collector (11) are arranged at a plurality of positions in the region between the portion opposing to the hollow cylindrical portion (5a) and a peripheral portion. Thus, the cylindrical cell can have a high resistance against a large current discharge and a high metal case pressure.
Description
Technical field
The present invention relates to have the cylindrical battery and the manufacture method thereof that are wound into circinate pole plate group.
Background technology
Cylindrical battery has many kinds, and nickel-cadmium cell and Ni-MH battery etc. are representational.These cylindrical batteries since reliability higher, safeguard also easy, so in the various uses such as power supply that portable phone and notebook computer are used, be extensive use of.In addition, in recent years, require exploitation to be suitable for the power supply of the cylindrical battery of heavy-current discharge as electric assisted bicycle, hay mover even electric automobile etc.
The cylindrical battery that this big electric current is used be strip-shaped positive electrode plate and negative plate are clipped isolate usefulness separator and superimposed, integral body is wound into the whirlpool shape and constitutes the pole plate group, this pole plate group is accommodated in the metal battery case and constitutes.In addition, current collection as the input and output that are suitable for big electric current, positive electrode collector is welded on the ora terminalis part of the outstanding positive plate in the upper surface of pole plate group with a plurality of positions, negative electrode collector is welded on the ora terminalis part of the outstanding negative plate in the lower surface of pole plate group with a plurality of positions.In addition, positive electrode collector is formed with open-work at central portion, negative electrode collector 21 cuts out and forms tongue-shaped brace 22 at central portion as shown in figure 12, and the pole plate group after collector body these are anodal and negative pole welds is received in the metal-back negative electrode collector down.Positive electrode collector is connected with hush panel via connecting lead-in wire, negative electrode collector and metal-back by positive electrode collector open-work and the hollow cylinder portion of pole plate group insert the welding electrode rod, by this welding electrode rod with contact the bottom surface that is configured in metal-back on welding electrode between push and flow through welding current under the state of inner bottom surface of the tongue-shaped brace 22 of negative electrode collector and metal-back and carry out resistance welded.
In addition, known have a following technology: form outstanding contact recess on the central portion of negative electrode collector downwards, on the bottom surface of metal-back, form outstanding to the inside welding projection, by these welding are contacted with engagement concavity subordinate surface with projection, carry out means of spot welds (for example with reference to TOHKEMY 2000-106165 communique) between the two well.
But, in above-mentioned structure in the past,, be connected the resistance problem of higher between metal-back and the collector body so have because metal-back and negative electrode collector only be connected by 1 welding position.For example, if with the such heavy-current discharge of 100A, then because the resistance of the weld part of metal-back and negative electrode collector is higher, so the problem that has the voltage of battery to reduce rapidly.In addition, under situation about as shown in Figure 12 tongue-shaped brace 22 being welded on the metal-back, the energising resistance of tongue-shaped brace 22 itself is bigger, also has when the flowing through big electric current tongue-shaped brace 22 might fusion and the problem that ruptures.In addition, as TOHKEMY 2000-106165 communique is disclosed, under situation with the welding projection of the bottom surface central authorities of metal-back and negative electrode collector welding, if expand because of over-charging of battery electricity condition etc. makes the rise bottom surface of metal-back of inner pressure of battery, negative electrode collector is out of shape too thereupon, the problem that existence might be peeled off with the weld part of negative plate, the resistance of battery can rise.
So, the present invention is in view of above-mentioned problem points in the past, purpose provides a kind of cylindrical battery and manufacture method thereof, metal-back and collector body to be connected resistance low, and voltage reduces can be suppressed at heavy-current discharge the time, when inner pressure of battery rises, also can suppress the distortion of collector body, can guarantee stable connection status with collector body.
Summary of the invention
Cylindrical battery of the present invention, have: the pole plate group, constitute by strip-shaped positive electrode plate, negative plate and separator, make separator be clipped between positive plate and the negative plate and positive plate and negative plate core is separately constituted to be wound into the whirlpool shape under the state that opposition side is given prominence to mutually on the plate width direction; A collector body is welded on the core protuberance of pole plate group; Another collector body, a plurality of projections are outstanding on lower surface, another core protuberance welding of upper surface and pole plate group; Metal-back makes another collector body accommodate the pole plate group that combines two collector bodies down, and the projection of another collector body is welded on the inner bottom surface; Electrolyte is injected in the metal-back; Seal body with the metal-back electric insulation, with the top seal of metal-back, and has the lid of double as input and output terminal up; The projection of another collector body be configured in and the opposed part of hollow cylinder portion of pole plate group and circumference between the zone in a plurality of positions on.
According to this structure, welding will be connected with metal-back owing to will be welded on another collector body on the pole plate group via the projection on a plurality of positions in the zone that is darted between on another collector body and opposed part of the hollow cylinder portion pole plate group and the circumference, so can reduce connection resistance by connecting with a plurality of positions, can reduce the internal resistance of battery thus, can eliminate when heavy-current discharge connecting portion fusion or cause the possibility that voltage descends, the high efficiency that can carry out battery discharges and recharges.In addition, because the welding by a plurality of positions combines the battery case bottom surface integratedly with another collector body, even so uprise in rigidity, inner pressure of battery also can suppress metal-back bottom surface and collector body when rising distortion, stable connection status can be guaranteed, battery performance can be stably kept.
In addition, cylindrical battery of the present invention, have: the pole plate group, constitute by strip-shaped positive electrode plate, negative plate and separator, make separator be clipped between positive plate and the negative plate and positive plate and negative plate core is separately constituted to be wound into the whirlpool shape under the state that opposition side is given prominence to mutually on the plate width direction; A collector body is welded on the core protuberance of pole plate group; Another collector body, solder bond is on another core protuberance of pole plate group; Metal-back is being accommodated the pole plate group that combines two collector bodies, and has inwards outstanding a plurality of projections on the bottom surface, the collector body solder bond of this projection and the lower side of the pole plate group of being accommodated; Electrolyte is injected in the metal-back; Seal body with the metal-back electric insulation, with the top seal of metal-back, and has the lid of double as input and output terminal up; The projection of metal-back bottom surface be configured in and the opposed part of hollow cylinder portion of pole plate group and circumference between the zone in a plurality of positions on.
Under the situation on the bottom surface side that like this projection is darted at metal-back rather than another collector body, also can bring into play the action effect same with above-mentioned cylindrical battery.
And then, the manufacture method of cylindrical battery of the present invention, have: separator is clipped between positive plate and the negative plate, and positive plate and negative plate are made the operation of pole plate group making separately core to mutually being wound into the whirlpool shape under the outstanding state of opposition side on the plate width direction; A collector body is welded on the operation on the core protuberance of pole plate group; A plurality of positions in the zone between opposed part of hollow cylinder portion on another collector body and the pole plate group and the circumference make towards below the operation of the projection of giving prominence to; The upper surface of another collector body is welded on the operation on another core protuberance of pole plate group; The pole plate group is housed in operation in the metal-back; With the projection of another collector body and the operation of metal-back welding; Inject the electrolyte into the operation in the metal-back; The seal body of the lid by having the double as input and output terminal with the state of metal-back electric insulation under the operation that the top of metal-back is airtight; In the operation that projection and metal-back with another collector body weld, the pressurization of pole plate group and metal-back is connected airtight, utilize the welding electrode rod in the hollow cylinder portion that is inserted in the pole plate group to carry out resistance welded with welding electrode on contacting the bottom surface that is configured in metal-back.
According to this manufacture method, by pole plate group and metal-back pressurization are connected airtight, from the position that the central portion of another collector body leaves, also can be crimped on the bottom surface of metal-back reliably even a plurality of projections are positioned at, by the welding electrode rod that welding current is flow through contact with the central portion of another collector body and with welding electrode that the bottom surface of metal-back contacts between, a plurality of projections can be welded on the bottom surface of metal-back reliably, can bring into play the cylindrical battery of above-mentioned action effect with the high reliability manufacturing.
In addition, the manufacture method of cylindrical battery of the present invention, have: separator is clipped between positive plate and the negative plate, and positive plate and negative plate are made the operation of pole plate group making separately core to mutually being wound into the whirlpool shape under the outstanding state of opposition side on the plate width direction; A collector body is welded on the operation on the core protuberance of pole plate group; Another collector body is welded on the operation on another core protuberance of pole plate group; The operation of inwards outstanding projection is made at a plurality of positions in the zone between opposed part of hollow cylinder portion on the bottom surface of metal-back and the pole plate group and the circumference; The pole plate group is housed in operation in the metal-back; Operation with the welding of the projection of another collector body and metal-back; Inject the electrolyte into the operation in the metal-back; The seal body of the lid by having the double as input and output terminal, with the state of metal-back electric insulation under the operation that the top of metal-back is airtight; In the operation that the projection of another collector body and metal-back is welded, the pressurization of pole plate group and metal-back is connected airtight, utilize the welding electrode rod in the hollow cylinder portion that is inserted in the pole plate group to carry out resistance welded with welding electrode on contacting the bottom surface that is configured in metal-back.
Under the situation on the bottom surface side that like this projection is darted at metal-back rather than another collector body, also can bring into play the action effect same with the manufacture method of above-mentioned cylindrical battery.
Description of drawings
Fig. 1 is the longitudinal section of the cylindrical battery of relevant the 1st execution mode of the present invention.
Fig. 2 is the stereogram of the negative electrode collector of this execution mode.
Fig. 3 is the sectional elevation of the negative electrode collector of this execution mode.
Fig. 4 is the longitudinal section of the resistance welded operation of the metal-back of this execution mode and negative electrode collector.
Fig. 5 is the longitudinal section of another resistance welded operation of the metal-back of this execution mode and negative electrode collector.
Fig. 6 is the stereogram of another negative electrode collector of this execution mode.
Fig. 7 is the longitudinal section of the resistance welded operation of the metal-back of this execution mode and another negative electrode collector.
Fig. 8 is the longitudinal section of the cylindrical battery of relevant the 2nd execution mode of the present invention.
Fig. 9 is the longitudinal section of the resistance welded operation of the metal-back of this execution mode and negative electrode collector.
Figure 10 is the longitudinal section of the resistance welded operation of another metal-back of this execution mode and negative electrode collector.
Figure 11 is the figure of expression I (electric current)-V (voltage) characteristic.
Figure 12 is the stereogram of negative electrode collector of the cylindrical battery of example in the past.
Embodiment
(the 1st execution mode)
The cylindrical battery and the manufacture method thereof of the 1st execution mode of the present invention at first, are described with reference to Fig. 1～Fig. 7.
Fig. 1 is the schematic sectional view of the cylindrical battery of present embodiment.In Fig. 1, the pole plate group 5 of cylindrical battery constitutes banded separator 6 being clipped under the state between strip-shaped positive electrode plate 1 and the banded negative plate 2 they are wound into the whirlpool shape.The core 3 of positive plate 1 is projected into the top of pole plate group 5, and the core 4 of negative plate 2 is projected into the below of pole plate group 5.On the protuberance of the core 3 of anode plate 1 outstanding above the pole plate group 5, weld positive electrode collector 10, on the protuberance of the core 4 of negative plate 2 outstanding below the pole plate group 5, welding negative electrode collector 11.
The pole plate group 5 of welding these collector bodies 10,11 is housed in the inside of metal-back 7 of input and output terminal of double as negative pole.The peristome of the upper end of metal-back 7 is sealed by the seal body 9 that has a lid of double as positive terminal with metal-back 7 electric insulations and top.Seal body 9 connects by being connected lead-in wire 8 with positive electrode collector 10.Negative electrode collector 11 and metal-back 7 are welded on by a plurality of projections 12 on the lower surface that will be darted at negative electrode collector 11 on the inner bottom surface of metal-back 7 and are connected.
Fig. 2 is the stereogram of negative electrode collector 11, and Fig. 3 is the sectional elevation of negative electrode collector 11.In Fig. 2, Fig. 3, in the central part of negative electrode collector 11 and the zone between the circumference, be equipped with a plurality of (being 4 in illustrative example) projection 12a (12), be equipped with 1 projection 12b (12) at central part.Projection 12a is uniformly-spaced setting on the concentric circles (being 90 degree intervals in illustrative example).In addition, before on the inner bottom surface that is welded to metal-back 7, must be lower with the height setting of the projection 12b of central part than the height of the projection 12a that is configured to concentric circles.This difference in height d for example is set in about 100～500 μ m.
In addition, in Fig. 2, the 16th, from the plunging of giving prominence to upward with the radial both side edges that is formed on a plurality of (being 4 illustrative example) the slit 11a on the negative electrode collector 11.On the protuberance of the core 4 of the negative plate 2 by this plunging 16 being welded to pole plate group 5 with the state of nipping, can negative plate 2 be connected with negative electrode collector 11 with low resistance.
The manufacturing process of the cylindrical battery of above structure then is described.Make pole plate group 5 at first, as described above.Then, positive electrode collector 10 is welded on the protuberance of core 3 of positive plate 1 of pole plate group 5.In addition, and the opposed central portion of the 5a of hollow cylinder portion of the pole plate group 5 of negative electrode collector 11 and a plurality of positions in the zone between the circumference on make the projection 12a that gives prominence to downwards, on central portion, make projection 12b, the upper surface of this negative electrode collector 11 is welded on the protuberance of core 4 of negative plate 2 of pole plate group 5.Then, pole plate group 5 is accommodated in the metal-back 7, projection 12a, the 12b of negative electrode collector 11 and the bottom surface of metal-back 7 are welded.Then, inject the electrolyte in the metal-back 7, the seal body 9 of the lid by having the double as input and output terminal is with airtight with the top of metal-back 7 with the state of metal-back 7 electric insulations, thereby produces cylindrical battery.
Describe the operation that projection 12a, the 12b of above-mentioned negative electrode collector 11 and the bottom surface of metal-back 7 are welded in detail with reference to Fig. 4.In Fig. 4, pole plate group 5 is pressurizeed with the plus-pressure of wanting by group press 14, connect airtight on the inner bottom surface of metal-back 7.In addition, the 5a of the hollow cylinder portion insertion welding electrode rod 13a by open-work on the central portion that is formed at positive electrode collector 10 and pole plate group 5 is crimped on its front end on the central portion of negative electrode collector 11.In addition, welding electrode 13b contact is configured on the bottom surface of metal-back 7.Under this state, flow through between welding electrode rod 13a and the welding electrode 13b by making welding current, with a plurality of projection 12a of negative electrode collector 11,12b resistance welded on the inner bottom surface of metal-back 7.
When this welds, since be positioned at welding electrode rod 13a under, plus-pressure directly acts on and the height dimension of the projection 12b of the central portion that welding current is concentrated easily set than around a plurality of projection 12a low, so welding current flows through earlier between the bottom surface of a plurality of projection 12a around the welding initial stage and metal-back 7, the leading section of these projections 12a is with the welding of the degree of fusion, result switch on resistance decreasing and its height step-down.Then, become moment of the height identical, become welding current and roughly flow through all projection 12a, 12b equably with the projection 12b of central portion at the height of these projections 12a.Like this, do not have that projection 12b that welding current only concentrates on central portion goes up and welding on around a plurality of projection 12a inadequate worry that becomes, all projection 12a, 12b can be welded on the bottom surface of metal-back 7 equably.In addition, in order to obtain this effect reliably, a plurality of projection 12a on every side preferably form tapered, make the height step-down so that its front end ratio is easier to fusion.
In addition, as shown in Figure 5, be configured in the welding electrode on the bottom surface of metal-back 7 as contact, also can use with the welding electrode 13c of ring-type contact on the bottom surface of metal-back 7.If use such welding electrode 13c, then can each projection 12a, 12b can be welded on the bottom surface of metal-back 7 more equably by avoiding welding current to concentrate with the bottom surface of directly pushing projection 12b and metal-back 7 between welding electrode rod 13a and the welding electrode 13b.In addition, under the situation of using this welding electrode 13c, even without especially the height dimension of the projection 12b of central portion being lowered, also can make welding current roughly flow through all projection 12a, 12b equably, can be with each projection 12a, 12b welding equably to a certain degree.
In the above description, as negative electrode collector 11, show the example that projection 12b is set at central portion as shown in Figure 2, but also can make the structure that a plurality of projection 12a in the zone that is configured between central portion and the circumference only is set and omits the projection 12b of central portion as shown in Figure 6.In addition, in Fig. 6, the slit 11a of negative electrode collector 11 forms on 3 directions, and is corresponding with it, and projection 12a also is provided with 3 at interval with 120 degree.
In the welding sequence of the projection 12a of negative electrode collector 11 at this moment and the bottom surface of metal-back 7, as shown in Figure 7, pole plate group 5 is pressurizeed with the plus-pressure of wanting by group press 14, connect airtight at the 5a of hollow cylinder portion on the bottom surface of metal-back 7, by open-work on the central portion that is formed at positive electrode collector 10 and pole plate group 5 and insert welding electrode rod 13a, its front end is crimped on the central portion of negative electrode collector 11, will be configured on the bottom surface of metal-back 7 with the welding electrode 13b contact of plane contact.Under this state, flow through between welding electrode rod 13a and the welding electrode 13b by making welding current, with a plurality of projection 12a while resistance welded of negative electrode collector 11 on the inner bottom surface of metal-back 7.
(the 2nd execution mode)
The cylindrical battery and the manufacture method thereof of the 2nd execution mode of the present invention then, are described with reference to Fig. 8～Figure 10.In addition, give for the structural element identical and identical to omit explanation, mainly only difference is described with reference to label with above-mentioned the 1st execution mode.
In above-mentioned the 1st execution mode, prominent projection 12a, the 12b of having established on the lower surface of negative electrode collector 11, and be welded on the inner bottom surface of metal-back 7 via this projection 12a, 12b, but in the present embodiment, on the inner bottom surface of metal-back 7, dash forward and establish projection 15 (15a, 15b), be welded on the plane lower surface of negative electrode collector 11.
In Fig. 8, on the bottom surface of metal-back 7, with the opposed part of the 5a of hollow cylinder portion of pole plate group 5 and circumference between the zone in tab-likely upward become to have a plurality of projection 15a, with the opposed part of the 5a of hollow cylinder portion of pole plate group 5 on outstandingly upward be formed with 1 projection 15b.A plurality of projection 15a equally spaced are provided on the concentric circles.In addition, before on the lower surface that is welded to negative electrode collector 11, the height setting of the projection 15b of central part must be lower than the height of the projection 15a that is configured to concentric circles.The difference of its height is set at for example about 100～500 μ m.
The operation of projection 15a, the 15b of the bottom surface of above-mentioned metal-back 7 and negative electrode collector 11 being welded with reference to Fig. 9 explanation.In Fig. 9, pole plate group 5 is pressurizeed with the plus-pressure of wanting by group press 14, connect airtight on the bottom surface of metal-back 7.In addition, the 5a of the hollow cylinder portion insertion welding electrode rod 13a by open-work on the central portion that is formed at positive electrode collector 10 and pole plate group 5 is crimped on its front end on the central portion of negative electrode collector 11.In addition, welding electrode 13b contact is configured on the bottom surface of metal-back 7.Under this state, flow through between welding electrode rod 13a and the welding electrode 13b by making welding current, with a plurality of projection 15a of the bottom surface of metal- back 7,15b resistance welded on the lower surface of negative electrode collector 11.
When this welds, since be positioned at welding electrode rod 13a under, plus-pressure directly acts on and the height dimension of the projection 15b of the central portion that welding current is concentrated easily set than around a plurality of projection 15a low, and and negative electrode collector 11 between formed the gap, so welding current flows through earlier between a plurality of projection 15a around the welding initial stage and negative electrode collector 11, the leading section of these projections 15a is with the welding of the degree of fusion, result switch on resistance decreasing and its height step-down.Then, become moment of the height identical, become welding current and roughly flow through all projection 15a, 15b equably with the projection 15b of central portion at the height of these projections 15a.Like this, do not have that projection 15b that welding current only concentrates on central portion goes up and welding on around a plurality of projection 15a inadequate worry that becomes, all projection 15a, 15b and negative electrode collector 11 can be welded equably.In addition, in order to obtain this effect reliably, a plurality of projection 15a on every side preferably form tapered, make the height step-down so that its front end ratio is easier to fusion.
In the example of Fig. 8, Fig. 9, on the central portion of the bottom surface of metal-back 7, be provided with projection 15b, but also can make the structure that a plurality of projection 15a in the zone that is configured between central portion and the circumference only is set and omits the projection 15b of central portion as shown in Figure 10.In the projection 15a of the bottom surface of metal-back 7 in this case and the welding sequence of negative electrode collector 11, as shown in figure 10, pole plate group 5 is pressurizeed with the plus-pressure of wanting by group press 14, connect airtight on the bottom surface of metal-back 7, the 5a of hollow cylinder portion by open-work on the central portion that is formed at positive electrode collector 10 and pole plate group 5 inserts welding electrode rod 13a, its front end is crimped on the central portion of negative electrode collector 11, will be configured on the bottom surface of metal-back 7 with plane welding electrode 13b contact of joining.Under this state, flow through between welding electrode rod 13a and the welding electrode 13b by making welding current, a plurality of projection 15a while resistance welded of negative electrode collector 11 with the inner bottom surface of metal-back 7.
In addition, though omitted diagram, but in welding sequence shown in Figure 9, same with the example of Fig. 5 of the 1st execution mode, be configured in the welding electrode on the bottom surface of metal-back 7 as contact, also can use with the welding electrode 13c of ring-type contact on the bottom surface of metal-back 7,, can bring into play same action effect by like this.
(embodiment)
Then represent concrete example of the present invention.Cylindrical battery A of the present invention is the nickel-hydrogen accumulator of diameter 33mm, height 61mm, nominal capacity 6000mAh, below describes its structure and manufacture method in detail.
Use the sintered nickel positive electrode plate of banded thickness 0.5mm and the hydrogen absorbing alloy negative plate of thickness 0.3mm, and make core on Width separately mutually the lateral margin of opposition side expose.Separator is clipped between these positive plates and the negative plate, and be configured to make the core that exposes of positive plate and negative plate to give prominence to being offset 1.5mm up and down respectively, these positive plates and negative plate integral body are wound into the whirlpool shape, constitute the electrode group of diameter 30mm, height 50mm.
The positive electrode collector of rectangle and diagonal angle length 27mm, thickness 400 μ m is welded on exposing in the core portion of above-mentioned electrode group upper surface, circle and diameter 27mm, thickness 400 μ m, the negative electrode collector that has 1 the projection X of the height 300 μ m on the central part and equally spaced be configured in 4 the projection Y of the height 500 μ m on the concentric circles of the 15mm of distance center portion are welded on exposing in the core portion of electrode group lower surface.
This electrode group is inserted in the metal-back, by power extruding electrode group and the metal-back of group press with 200N, 5 projections and the metal-back of negative electrode collector are connected airtight, make the central through-hole part of 1 root bead receiving electrode rod by positive electrode collector, by between the welding electrode that is disposed under the metal-back, applying the welding current of 4kA, 5 projections of negative electrode collector are welded on the inner bottom surface of battery metal shell.In addition, the electric current when welding in order to make flows through 5 projections equably, and the height of the projection Y at center is preferably lower than the height of projection X.
In the present embodiment, be under the situation of welding of the pressurized conditions below the 50N at plus-pressure with the group press, might projection and the connecting airtight not exclusively of metal-back, might 5 have in the projections several less than welding.In addition, under the situation more than the 400N, the bending of the core protuberance of possible electrode group, generation positive pole and negative pole short circuit.In addition, if with the welding of the electric current below the 1kA, there then might have several projections not have to be soldered, otherwise under the situation more than the 6kA, can become the main cause of battery short circuit from weld part generation flying chip.
Then, after being injected into metal-back in from the central through-hole part of positive electrode collector the alkaline electrolyte of ormal weight, the front end that is located at the connection lead-in wire on the positive electrode collector is welded on the seal body as positive terminal, with seal body that the peristome of metal-back is airtight and produce cylindrical battery A of the present invention.
There is not the cylindrical battery of projection B on the negative electrode collector in order relatively to produce with cylindrical battery A.
Use cylindrical battery A, B measure internal resistance and compare.Discharging with the current value of 2A under room temperature (25 ℃) becomes 0.9V up to cell voltage, then with the current value charging of 6A 30 minutes.Then, after stopping 1 hour,, measure the 10th second cell voltage with the current value of 25A discharge 20 seconds.Then, after the capacity part of being discharged of having charged, the current value with 50A, 75A, 100A discharged 20 seconds equally, measured the cell voltage after 10 seconds respectively.Cell voltage after obtain like this 10 seconds as the longitudinal axis, as transverse axis, is obtained the slope of the straight line of I (electric current)-V (voltage) characteristic with each current value, its result is represented in Figure 11.
As shown in Figure 11, bigger with respect to the slope (internal resistance) of the straight line of the cylindrical battery B of comparative example, the slope of cylindrical battery A of the present invention is less.The internal resistance of each battery is 2.9m Ω, 2.6m Ω, the little 0.3m Ω of the internal resistance of cylindrical battery A of the present invention as can be known.Consider that this is because if the bonded area of negative electrode collector and metal-back is bigger, then electric current is shorter from the path that negative electrode collector flows to metal-back (negative terminal), so internal resistance reduces, can carry out the high efficiency discharge.
In addition, the result who is expanded in the end of inner pressure of battery and metal-back represents in following table 1.As shown in Table 1, battery A compares with battery B, is half with respect to the end swell increment of the metal-back of interior pressure, can obtain 2 times metal-back resistance to pressure.Consider that this is because the end of the metal-back of battery A is integrated by 5 projections and negative electrode collector, can obtain the identical effect of effect that rises with resistance to pressure under the situation of the base thickness of having thickeied metal-back.
(table 1)
| Interior press (MPa) | The swell increment at the end of metal-back (mm) | |
| Battery A | Battery B | |
| 1.0 | 0.1 | 0.2 |
| 2.0 | 0.3 | 0.7 |
Industrial applicibility
As described above, according to cylindrical battery of the present invention, by with negative electrode collector and metal-back via and the opposed central portion of hollow cylinder section of the pole plate group of negative electrode collector and the zone between the circumference in a plurality of projection resistance welded of disposing, can reduce contact resistance, can reduce thus the internal resistance of battery, it is stronger to bear large current discharging capability, and can improve the compressive resistance of metal-back, so be particularly suitable for using in the cylindrical battery that heavy-current discharge uses.
Claims (10)
1, a kind of cylindrical battery has:
Pole plate group (5), constitute by strip-shaped positive electrode plate (1), negative plate (2) and separator (6), make separator be clipped between positive plate and the negative plate and positive plate and negative plate core (3,4) is separately constituted to be wound into the whirlpool shape under the state that opposition side is given prominence to mutually on the plate width direction;
A collector body (10) is welded on the core protuberance of pole plate group;
Another collector body (11), a plurality of projections (12) are outstanding on lower surface, another core protuberance welding of upper surface and pole plate group;
Metal-back (7) makes another collector body accommodate the pole plate group that combines two collector bodies down, and the projection of another collector body is welded on the inner bottom surface;
Electrolyte is injected in the metal-back;
Seal body (9) with the metal-back electric insulation, with the top seal of metal-back, and has the lid of double as input and output terminal up;
The projection of another collector body be configured in and the opposed part of hollow cylinder portion (5a) of pole plate group and circumference between the zone in a plurality of positions on.
2, cylindrical battery as claimed in claim 1, the projection (12b) of another collector body (11) also are provided on the opposed part of hollow cylinder portion with pole plate group (5).
3, a kind of cylindrical battery has:
Pole plate group (5), constitute by strip-shaped positive electrode plate (1), negative plate (2) and separator (6), make separator be clipped between positive plate and the negative plate and positive plate and negative plate core (3,4) is separately constituted to be wound into the whirlpool shape under the state that opposition side is given prominence to mutually on the plate width direction;
A collector body (10) is welded on the core protuberance of pole plate group;
Another collector body (11), solder bond is on another core protuberance of pole plate group;
Metal-back (7) is being accommodated the pole plate group that combines two collector bodies, and has inwards outstanding a plurality of projections (15) on the bottom surface, the collector body solder bond of this projection and the lower side of the pole plate group of being accommodated;
Electrolyte is injected in the metal-back;
Seal body (9) with the metal-back electric insulation, with the top seal of metal-back, and has the lid of double as input and output terminal up;
The projection of metal-back bottom surface be configured in and the opposed part of hollow cylinder portion (5a) of pole plate group and circumference between the zone in a plurality of positions on.
4, cylindrical battery as claimed in claim 3, the projection (15b) of metal-back (7) bottom surface also are provided on the opposed part of hollow cylinder portion with pole plate group (5).
5, a kind of manufacture method of cylindrical battery has:
Separator (6) is clipped between positive plate (1) and the negative plate (2), and positive plate and negative plate are made the operation of pole plate group (5) making separately core (3,4) to mutually being wound into the whirlpool shape under the outstanding state of opposition side on the plate width direction;
A collector body (10) is welded on the operation on the core protuberance of pole plate group;
The operation of the projection (12) outstanding towards the below is made at a plurality of positions in the zone between opposed part of hollow cylinder portion on another collector body (11) and the pole plate group (5a) and the circumference;
The upper surface of another collector body is welded on the operation on another core protuberance of pole plate group;
The pole plate group is housed in the interior operation of metal-back (7);
With the projection of another collector body and the operation of metal-back welding;
Inject the electrolyte into the operation in the metal-back;
The seal body (9) of the lid by having the double as input and output terminal, with the state of metal-back electric insulation under the operation that the top of metal-back is airtight;
In the operation that projection and metal-back with another collector body weld, the pressurization of pole plate group and metal-back is connected airtight, utilize the welding electrode rod (13a) in the hollow cylinder portion that is inserted in the pole plate group to carry out resistance welded with welding electrode (13b) on contacting the bottom surface that is configured in metal-back.
6, the manufacture method of cylindrical battery as claimed in claim 5, use another following collector body: on the part corresponding, also have other projections (12b), and the height of this projection is set than low at the height of part corresponding with the hollow cylinder portion of pole plate group and a plurality of projections (12a) between the circumference with the hollow cylinder portion (5a) of pole plate group (5).
7, the manufacture method of cylindrical battery as claimed in claim 5 is utilized with the welding electrode (13c) of ring-type contact on the bottom surface of metal-back (7), with the projection (12) and the metal-back resistance welded of another collector body (11).
8, a kind of manufacture method of cylindrical battery has:
Separator (6) is clipped between positive plate (1) and the negative plate (2), and positive plate and negative plate are made the operation of pole plate group (5) making separately core (3,4) to mutually being wound into the whirlpool shape under the outstanding state of opposition side on the plate width direction;
A collector body (10) is welded on the operation on the core protuberance of pole plate group;
Another collector body (11) is welded on the operation on another core protuberance of pole plate group;
The operation of inwards outstanding projection (15) is made at a plurality of positions in the zone between opposed part of hollow cylinder portion on the bottom surface of metal-back (7) and the pole plate group (5a) and the circumference;
The pole plate group is housed in the interior operation of metal-back (7);
Operation with the welding of the projection of another collector body and metal-back;
Inject the electrolyte into the operation in the metal-back;
The seal body (9) of the lid by having the double as input and output terminal, with the state of metal-back electric insulation under the operation that the top of metal-back is airtight;
In the operation that the projection of another collector body and metal-back is welded, the pressurization of pole plate group and metal-back is connected airtight, utilize the welding electrode rod (13a) in the hollow cylinder portion that is inserted in the pole plate group to carry out resistance welded with welding electrode (13b) on contacting the bottom surface that is configured in metal-back.
9, the manufacture method of cylindrical battery as claimed in claim 8, use following metal-back (7): on the part corresponding, also have other projections (15b), and the height of this projection is set than low at the height of part corresponding with the hollow cylinder portion of pole plate group and a plurality of projections (15a) between the circumference with the hollow cylinder portion (5a) of pole plate group (5).
10, the manufacture method of cylindrical battery as claimed in claim 8 is utilized with the welding electrode (13c) of ring-type contact on the bottom surface of metal-back (7), with projection (15) resistance welded of another collector body (11) with metal-back.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003299598 | 2003-08-25 | ||
| JP299598/2003 | 2003-08-25 | ||
| JP210190/2004 | 2004-07-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1842930A true CN1842930A (en) | 2006-10-04 |
| CN100416892C CN100416892C (en) | 2008-09-03 |
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ID=37031182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800247418A Expired - Lifetime CN100416892C (en) | 2003-08-25 | 2004-08-23 | Cylindrical cell and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100416892C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479969A (en) * | 2010-11-19 | 2012-05-30 | 朱益辉 | Ring cylinder power cell different from traditional structure |
| CN103400704A (en) * | 2013-07-23 | 2013-11-20 | 李晓龙 | Super capacitor |
| CN103545571A (en) * | 2012-07-13 | 2014-01-29 | 上海通用汽车有限公司 | Fluid heat-exchange type battery cell, battery and vehicle |
| CN103545570A (en) * | 2012-07-13 | 2014-01-29 | 上海通用汽车有限公司 | Air-cooled type battery cell, battery and vehicle |
| WO2024098328A1 (en) * | 2022-11-10 | 2024-05-16 | Techtronic Cordless Gp | Battery cell |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1131497A (en) * | 1997-05-12 | 1999-02-02 | Matsushita Electric Ind Co Ltd | Cylindrical battery |
| JP4538857B2 (en) * | 1998-08-07 | 2010-09-08 | 株式会社Ｇｓユアサ | Cylindrical battery, method for manufacturing the same, and spot welding electrode for battery current collector |
| JP2000106165A (en) * | 1998-09-28 | 2000-04-11 | Japan Storage Battery Co Ltd | Cylindrical battery |
| JP2000268850A (en) * | 1999-03-18 | 2000-09-29 | Sanyo Electric Co Ltd | Alkaline storage battery and its manufacture |
| JP3627645B2 (en) * | 2000-10-24 | 2005-03-09 | 新神戸電機株式会社 | Lithium secondary battery |
-
2004
- 2004-08-23 CN CNB2004800247418A patent/CN100416892C/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479969A (en) * | 2010-11-19 | 2012-05-30 | 朱益辉 | Ring cylinder power cell different from traditional structure |
| CN103545571A (en) * | 2012-07-13 | 2014-01-29 | 上海通用汽车有限公司 | Fluid heat-exchange type battery cell, battery and vehicle |
| CN103545570A (en) * | 2012-07-13 | 2014-01-29 | 上海通用汽车有限公司 | Air-cooled type battery cell, battery and vehicle |
| CN103400704A (en) * | 2013-07-23 | 2013-11-20 | 李晓龙 | Super capacitor |
| CN103400704B (en) * | 2013-07-23 | 2016-03-02 | 李晓龙 | Ultracapacitor |
| WO2024098328A1 (en) * | 2022-11-10 | 2024-05-16 | Techtronic Cordless Gp | Battery cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100416892C (en) | 2008-09-03 |
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