CN204464374U - Lead accumulator grid, pole plate, pole plate group and lead accumulator - Google Patents

Abstract

The utility model relates to lead accumulator grid, pole plate, pole plate group and lead accumulator.The center of the Width of lug (2) is 0.29 ~ 0.34 from the ratio a/W of the distance a of the nearly end margin (4) of Width of above-mentioned grid (1) and the width W of above-mentioned grid (1) in above-mentioned grid (1), and the ratio b/W of the width b of above-mentioned lug (2) and the width W of above-mentioned grid (1) is 0.14 ~ 0.205.Positive plate and/or the negative plate of above-mentioned pole plate group have employed above-mentioned grid.Above-mentioned lead accumulator have employed above-mentioned pole plate group.The high rate discharging excellent of above-mentioned lead accumulator and the welding operation of bus-bar, resistance to internal short-circuit, vibration resistance and assembly operation are good.

Description

Lead accumulator grid, pole plate, pole plate group and lead accumulator

Technical field

The utility model relates to lead accumulator grid, pole plate, pole plate group and lead accumulator, specifically, relate to the good pole plate group of high rate discharging excellent, the welding operation of bus-bar and resistance to internal short-circuit and employ the high rate discharging excellent of this pole plate group and the good lead accumulator of the welding operation of bus-bar, resistance to internal short-circuit, vibration resistance and assembly operation.

Background technology

Lead accumulator (hereinafter sometimes by " lead accumulator " referred to as " battery ") is widely used as the startup power supply of such as vehicle etc. and stand-by power supply and is used as the electrical source of power of such as electric automobile, electric bicycle, battery-operated motor cycle, Segway Human Transporter, small-sized electric vehicle using motor, golf cart etc.Lead accumulator is also widely used as the energy storage battery of solar power plant and regenerative resource etc.In these purposes, there is different requirements respectively to the performance of lead accumulator, such as, require that high rate discharging characteristic is good, effectively can suppress short circuit generation, vibration resistance is good.In addition, in the processing and manufacturing process of lead accumulator, also wish simplified processing process and raise the efficiency.

In order to improve each performance of lead accumulator, each structural elements and key element are being studied in the prior art always.Pole plate is one of topmost component of lead accumulator, and the performance etc. of its stuctures and properties on lead accumulator has important impact, so carrying out various research to pole plate always.

Japanese Patent Laid-Open 7-307148 disclose a kind of distortion of pole plate less, lead accumulator that life performance is excellent, wherein, distance between the center in the lug portion of positive/negative plate and one end of pole plate is 1/5W ~ 4/5W relative to plate width W, bus-bar is formed by cast welding technique (COS), the center of the connecting portion between adjacent-cell battery is consistent with the center in lug portion, and makes the thickness of formed bus-bar be more than 4mm.Clearly mention in the document: in lead accumulator, because lug is fixed by the connecting portion between bus-bar and adjacent-cell battery, so the net grid of the bottom of lug deform hardly; But the net grid of the position far away with lug spacing distance are easier longitudinally to deform; Therefore, in order to reduce the distortion of whole grid, it would be desirable the centre position making the position of lug remain on the crossbeam bone of grid.On the other hand, if the position of lug remains on the centre position of the crossbeam bone of grid, then in pole plate group positive pole ear and negative lug can be in mutually very close to position on, both positive and negative polarity bus-bar cannot be formed, therefore need position lug being arranged on the centre position of departing from slightly crossbeam bone.The technical conceive of the document can be summarized as: consistent with the center of the connecting portion between adjacent-cell battery by the center in lug portion, thus pole plate is fixed by the connecting portion between bus-bar and adjacent-cell battery; By making the middle body of position near pole plate of bus-bar, then the distance from the position of bus-bar to pole plate both ends shortens, so tail off at the percentage elongation of the pole plate at both ends, can suppress the distortion of whole pole plate thus.Further, by making the thickness of bus-bar be more than the value of regulation, the distortion of grid can be suppressed further.As can be seen here, in the publication, by under the prerequisite of busbar cast welding technique having guaranteed both positive and negative polarity, make the position of lug as far as possible near the centre position of grid, and make the thickness of bus-bar be more than the value of regulation, suppress the distortion of pole plate and the distortion etc. of bus-bar thus, thus prevent short circuit from occurring, improve the life performance of battery.

But, for lead accumulator, if the position of lug remains on the centre position of the crossbeam bone of grid or this centre position close, then likely cause to inject electrolyte from the middle body of the pole plate battery, thus electrolyte can only be injected from the region beyond middle body, result can not guarantee that electrolyte is impregnated into distance fluid injection position plate regions far away, and the impregnability of electrolyte in whole pole plate is poor, and electrolyte is difficult to be uniformly distributed in whole pole plate.

The clear 58-64763 of Japan Patent discloses a kind of lead accumulator grid, and it is conceived to electrical collector, to be suppressed thus improve voltage characteristic by the electric current that flows through grid to voltage drop.Its concrete technical conceive is: move to centre position from the end of the entablature bone of grid by making lug, and make the total weight of vertical rib strip or total radical increase, transverse rod strip is reduced, thus the distribution of weight ratio of vertical rib strip and transverse rod strip is adjusted, hence improve the voltage characteristic during sudden discharge of lead accumulator.Also refer to lug in the publication can be arranged in 1/2 region except center and end of the entablature bone of grid, and illustrated in Fig. 3 of the document can use diagonal bar bar in grid.

Therefore, though carried out various research to the performance of pole plate and structure in prior art, but also do not find the high rate discharging characteristic improving lead accumulator by being optimized design to the structure of pole plate, guarantee the welding operation of otherwise performance such as bus-bar, resistance to internal short-circuit, vibration resistance and assembly operation simultaneously.

Utility model content

Technical problem to be solved

The purpose of this utility model is to provide the welding operation of high rate discharging excellent, bus-bar and the good pole plate group of resistance to internal short-circuit and employs the high rate discharging excellent of this pole plate group and the good lead accumulator of the welding operation of bus-bar, resistance to internal short-circuit, vibration resistance and assembly operation.

The means solved this technical problem

The utility model is by being optimized design by the structure of pole plate and electric groove, namely design is optimized to the ratio of the width of pole plate and the width of element cell room in the ratio of the width of the position of lug, the width of lug and pole plate and pole plate group, thus solves above-mentioned technical problem.

That is, the utility model relates to following content.

(1), a kind of lead accumulator grid, it is characterized in that, the center of the Width of lug is 0.29 ~ 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of above-mentioned grid and the width W of above-mentioned grid, and the ratio b/W of the width b of above-mentioned lug and the width W of above-mentioned grid is 0.14 ~ 0.205.

(2) the lead accumulator grid, according to above-mentioned (1), is characterized in that, above-mentioned ratio a/W is 0.31 ~ 0.33.

(3) the lead accumulator grid, according to above-mentioned (1) or (2), is characterized in that, above-mentioned ratio b/W is 0.15 ~ 0.18.

(4), a kind of lead accumulator pole plate, its active material layer comprising grid and kept by this grid, it is characterized in that, the center of the Width of lug is 0.29 ~ 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of above-mentioned pole plate and the width W of above-mentioned pole plate, and the ratio b/W of the width b of above-mentioned lug and the width W of above-mentioned pole plate is 0.14 ~ 0.205.

(5) the lead accumulator pole plate, according to above-mentioned (4), is characterized in that, above-mentioned ratio a/W is 0.31 ~ 0.33.

(6) the lead accumulator pole plate, according to above-mentioned (4) or (5), is characterized in that, above-mentioned ratio b/W is 0.15 ~ 0.18.

(7) the lead accumulator pole plate, according to above-mentioned (4) or (5), is characterized in that, above-mentioned pole plate is positive plate or negative plate.

(8), a kind of lead accumulator pole plate group, it is formed across dividing plate is alternately stacked by multi-disc positive plate and multi-disc negative plate, it is characterized in that, above-mentioned positive plate is the pole plate described in any one of above-mentioned (4) ~ (6), the center of the Width of the lug of above-mentioned negative plate is less than 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of above-mentioned negative plate and the width W of above-mentioned negative plate, and the ratio b/W of the width b of the lug of above-mentioned negative plate and the width W of above-mentioned negative plate is less than 0.205.

(9) the lead accumulator pole plate group, according to above-mentioned (8), is characterized in that, the above-mentioned ratio a/W of above-mentioned negative plate is 0.29 ~ 0.34.

(10) the lead accumulator pole plate group, according to above-mentioned (8), is characterized in that, the above-mentioned ratio a/W of above-mentioned negative plate is 0.31 ~ 0.33.

(11), according to the lead accumulator pole plate group described in any one of above-mentioned (8) ~ (10), it is characterized in that, the above-mentioned ratio b/W of above-mentioned negative plate is 0.14 ~ 0.205.

(12), according to the lead accumulator pole plate group described in any one of above-mentioned (8) ~ (10), it is characterized in that, the above-mentioned ratio b/W of above-mentioned negative plate is 0.15 ~ 0.18.

(13), a kind of lead accumulator, it has multiple element cell, this element cell is accommodated in element cell room by pole plate group and is formed together with electrolyte, it is characterized in that, above-mentioned pole plate group is the pole plate group according to any one of above-mentioned (8) ~ (12).

(14) lead accumulator, according to above-mentioned (13), is characterized in that, in above-mentioned pole plate group, the ratio W/Q of the width W of pole plate and the width Q of said units battery chamber is 0.89 ~ 0.93.

(15) lead accumulator, according to above-mentioned (14), is characterized in that, above-mentioned ratio W/Q is 0.90 ~ 0.92.

Invention effect

According to the utility model, by being optimized design to the center of lug from the ratio of the nearly distance of an end margin of pole plate and the ratio of plate width and lug width and plate width, thus the electrical collector of positive/negative plate and the high rate discharging characteristic of lead accumulator can be improved; Can ensure to inject electrolyte from the middle body of pole plate, improve the uniformity that electrolyte carries out to the various piece of pole plate soaking into, can effectively prevent internal short-circuit from occurring; Further, the welding operation when the tab welding bus-bar to positive/negative plate can be improved.In addition, design is optimized by the ratio of the width of the pole plate (positive/negative plate) to pole plate group in lead accumulator and the width of each element cell room, vibration resistance and the assembly operation of lead accumulator can be improved, pole plate is not easily deformed, and the possibility of lead accumulator generation internal short-circuit can be reduced further.

Accompanying drawing explanation

Fig. 1 is the structure of grid of the present utility model and pole plate and the schematic diagram of size.

Fig. 2 is the schematic diagram of an example of pole plate of the present utility model.

Fig. 3 is the schematic diagram of another example of pole plate of the present utility model.

Fig. 4 is the schematic diagram representing the element cell room of lead accumulator of the present utility model and the size relationship of pole plate.

Embodiment

Below, with reference to accompanying drawing, the utility model is described.In the accompanying drawings, for the purpose of simplifying the description, the constitutive requirements with function identical are in fact represented by same reference symbol.In addition, the utility model is not limited to following execution mode.

Inventor of the present utility model finds the high rate discharging characteristic that will improve lead accumulator, just needs improve the sectional area of electric current conduction and/or fall the path of low current conduction.As a result, consider from these two aspects, all need the structure to pole plate, lug and strap etc., configuration and size to be optimized design.Further, while consideration improves high rate discharging characteristic, the otherwise performance taking into account lead accumulator is also needed.Inventor of the present utility model finds further, and the position of lug and the ratio of lug width and plate width have direct impact to high rate discharging characteristic, determines thus to arrange these key elements, meanwhile takes into account otherwise performance.

The utility model provides a kind of lead accumulator grid, wherein, the center of the Width of lug is 0.29 ~ 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of above-mentioned grid and the width W of above-mentioned grid, and the ratio b/W of the width b of above-mentioned lug and the width W of above-mentioned grid is 0.14 ~ 0.205.

Fig. 1 is the structure of grid of the present utility model and the schematic diagram of size.As shown in Figure 1, if above-mentioned ratio a/W is lower than 0.29, then lug 2 is less from the distance of the nearly end margin 4 of Width of grid 1, and namely lug 2 is very close to an end margin 4 of grid 1, and result set electrically reduces, and high rate discharging characteristic reduces.If above-mentioned ratio a/W is greater than 0.34, then lug 2 is larger from the distance of the nearly end margin 4 of Width of grid 1, namely lug 2 is very close to the middle body of the crossbeam bone 3 of grid 1, to make like this in pole plate group anode ear and negative electrode lug very close to, result causes being difficult to, to anode ear and negative pole lug welding bus-bar, even likely be short-circuited.And, because pole plate group is installed to when preparing lead accumulator in electric groove, need to inject electrolyte from the mid portion (i.e. the middle body of pole plate) between anode ear and negative electrode lug, if so in pole plate group anode ear and negative electrode lug very close to, then electrolyte is probably encountered bus-bar and successfully can not be injected pole plate group, result electrolyte likely cannot be soaked in whole pole plate group equably, and internal short-circuit (dendrite short circuit) likely occurs lead accumulator thus.On the other hand, if do not inject electrolyte from the mid portion between anode ear and negative electrode lug and inject electrolyte from the two side portions of pole plate group, then electrolyte likely cannot arrive from the corner portion away from liquid injection port, electrolyte just more likely cannot be soaked in whole pole plate group equably, thus internal short-circuit (dendrite short circuit) likely occurs lead accumulator.From the viewpoint of taking into account high rate discharging characteristic, the welding operation of bus-bar and resistance to internal short-circuit three, preferred above-mentioned ratio a/W is 0.31 ~ 0.33.

If above-mentioned ratio b/W is lower than 0.14, then lug width is less, and result set electrically reduces, and high rate discharging characteristic reduces.If above-mentioned ratio b/W is greater than 0.205, then lug width is comparatively large, and the width of positive bus and negative bus-bar is also comparatively large, and result causes being difficult to anode ear and negative pole lug welding bus-bar, and positive bus and negative bus-bar likely interval is too near, be even likely short-circuited.And, as previously mentioned, because pole plate group is installed to prepare lead accumulator in electric groove time, need to inject electrolyte from the mid portion between anode ear and negative electrode lug, if so in pole plate group anode ear and negative electrode lug very close to, then electrolyte probably encounters bus-bar, thus electrolyte can not successfully be injected pole plate group, result electrolyte likely cannot be soaked in pole plate group equably, thus internal short-circuit (dendrite short circuit) likely occurs lead accumulator.From the viewpoint of taking into account high rate discharging characteristic, the welding operation of bus-bar and resistance to internal short-circuit three, preferred above-mentioned ratio b/W is 0.15 ~ 0.18.

The utility model also provides a kind of lead accumulator pole plate, its active material layer comprising grid and kept by this grid, wherein, the center of the Width of lug is 0.29 ~ 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of above-mentioned pole plate and the width W of above-mentioned pole plate, and the ratio b/W of the width b of above-mentioned lug and the width W of above-mentioned pole plate is 0.14 ~ 0.205.As previously mentioned, from the viewpoint of taking into account high rate discharging characteristic, the welding operation of bus-bar and resistance to internal short-circuit three, preferred above-mentioned ratio a/W is 0.31 ~ 0.33, and above-mentioned ratio b/W is 0.15 ~ 0.18.The structure of above-mentioned pole plate and the schematic diagram of size are as shown in fig. 1.

Because the size of lead accumulator pole plate and grid is on all four in length and width, the above-mentioned situation therefore in the ratio of lug position in pole plate, lug width and plate width and grid is on all four.

Preferred above-mentioned pole plate as in positive plate and negative plate one of at least, but compared with negative plate, positive plate more needs to be configured to said structure, because positive plate more easily expands and is out of shape in lead accumulator, especially latter stage above-mentioned situation more easily occurs at battery life.Further, battery capacity is controlled by positive plate.Therefore, if positive plate is configured to said structure, more effect can be played.And inventor of the present utility model finds that the above-mentioned of positive plate has larger impact than value a/W, b/W to high rate discharging characteristic than the above-mentioned of negative plate than value a/W, b/W.

In addition, above-mentioned pole plate can adopt and draw in the net grid, also can adopt casting grid, have no particular limits.Fig. 2 is the schematic diagram of an example of pole plate of the present utility model, and this pole plate have employed processes by Qie Lafa the grid that draws in the net manufactured.Fig. 3 is the schematic diagram of another example of pole plate of the present utility model, and this pole plate have employed the grid manufactured by casting.

The utility model provides a kind of lead accumulator pole plate group further, it is formed across dividing plate is alternately stacked by multi-disc positive plate and multi-disc negative plate, wherein, above-mentioned positive plate is above-mentioned obtained pole plate, the center of the Width of the lug of above-mentioned negative plate is less than 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of above-mentioned negative plate and the width W of above-mentioned negative plate, and the ratio b/W of the width b of the lug of above-mentioned negative plate and the width W of above-mentioned negative plate is less than 0.205.That is, the lower limit of the ratio a/W of above-mentioned negative plate does not need expressly to limit.This is because, inventor of the present utility model finds compared with ratio a/W, b/W of positive plate, ratio a/W, b/W impact on high rate discharging characteristic of negative plate is smaller, so after the scope of ratio a/W, b/W defining positive plate in a pole plate group, can the lower limit of ratio a/W, b/W of anticathode plate limit especially, as long as normal ranges in the art.

But, from the viewpoint of taking into account high rate discharging characteristic, the welding operation of bus-bar and resistance to internal short-circuit three, in preferred pole plate group, the ratio a/W of negative plate is 0.29 ~ 0.34, ratio b/W is 0.14 ~ 0.205, and more preferably the ratio a/W of negative plate is 0.31 ~ 0.33, ratio b/W is 0.15 ~ 0.18.

In addition, from the viewpoint of raising efficiency for charge-discharge and cost control, the outermost of preferred above-mentioned pole plate group is negative plate, i.e. more than positive plate 1 of negative plate.Its reason is: positive plate active material is more loose, and the chemical reaction of positive plate is more violent than the chemical reaction of negative plate, before and after reaction, active material change in volume is larger, so when positive plate is clipped between negative plate, its both sides can be made to discharge evenly, thus alleviate the warpage of positive plate and active material comes off.

The utility model also provides a kind of lead accumulator, and it has multiple element cell, and this element cell is accommodated in element cell room by pole plate group and is formed together with electrolyte, and wherein, above-mentioned pole plate group is above-mentioned obtained pole plate group.

Inventor of the present utility model finds: in lead accumulator, the width W of pole plate (positive/negative plate) of pole plate group and the ratio W/Q of the width Q of element cell room also have obvious impact to the performance of lead accumulator.Fig. 4 is the schematic diagram representing the element cell room of lead accumulator of the present utility model and the size relationship of pole plate.If above-mentioned ratio W/Q is too small, namely the width Q of element cell room is excessive, then the gap between the wall of pole plate group and element cell room is large, and pole plate group easily rock, thus can not be stably fixed, so the vibration resistance of battery reduces.And if above-mentioned ratio W/Q is excessive, namely the width Q of element cell room is too small, gap between the wall of then pole plate group and element cell room is little, because the dividing plate of pole plate both sides can be wider and take the volume of a part of element cell room than pole plate, be not easy so be easily squeezed during pole plate group loading location battery chamber to load, cause battery to assemble difficulty; And pole plate also likely deforms in a thickness direction, even likely there is internal short-circuit.Comprehensive above-mentioned each side is considered, above-mentioned ratio W/Q is suitably 0.89 ~ 0.93, is preferably 0.90 ~ 0.92.

Below, specifically describe the utility model based on embodiment, but these embodiments are illustration of the present utility model, the utility model is not limited to these embodiments.

(embodiment 1)

(1) manufacture of positive plate

With the weight ratio of about 100:12:14, raw material lead powder (mixture of lead and lead oxide), water and dilute sulfuric acid are mediated, thus obtain the anode diachylon as positive active material.

The 1.3 millimeters thick. g., lead tape comprised containing the Pb alloy of have an appointment 0.07 quality %Ca and about 1.3 quality %Sn being drawn operation by cutting, being used reciprocating punching mould repeatedly to carry out punching press and expansion, forms the net slice with the grid formed that to be interlocked by many ruled line thus.Then, utilize the pair of rolls of shaping mould to carry out shaping to above-mentioned net slice, obtain drawing in the net grid as the positive plate of positive electrode collector.Then, grid fills above-mentioned anode diachylon along the length direction of grid to grid above-mentioned drawing in the net and forms stereotype.Then, adopted by stereotype rolling cut mode to be cut to the positive plate with positive pole ear, obtain the positive plate do not changed into thus.The positive plate this do not changed into is cured, dry and change into, obtain the positive plate being kept positive electrode active material layer by anode plate grid.Above-mentioned changing into can be carried out before being assembled into pole plate group, also can being assembled into pole plate group and being assembled to carrying out afterwards in the electric groove of lead accumulator.

The parameter of each inscape of gained positive plate is see the value shown in aftermentioned table 1, and wherein ratio a/W is 0.29, and ratio b/W is 0.165.

(2) manufacture of negative plate

With the weight ratio of about 100:10:4, raw material lead powder, water and dilute sulfuric acid are mediated, thus obtain the cathode lead plaster as negative electrode active material.With the Pb alloy raw material containing have an appointment 0.07 quality %Ca and about 0.25 quality %Sn by drawing in the net grid with similar reciprocating of the above-mentioned positive plate negative plate cutting daraf(reciprocal of farad) to obtain as negative electrode collector.Fill above-mentioned negative plate with above-mentioned cathode lead plaster and draw in the net grid, then adopt rolling cut mode to be cut to the negative plate with negative lug the grid (i.e. stereotype) that draws in the net being filled with above-mentioned lead plaster, obtain the negative plate do not changed into thus.By being cured the negative plate do not changed into, dry and change into, obtain the negative plate being kept negative electrode active material layer by negative electrode grid.Above-mentioned changing into can be carried out before being assembled into pole plate group, also can being assembled into pole plate group and being assembled to carrying out afterwards in the electric groove of lead accumulator.

The parameter of each inscape of gained negative plate is see the value shown in aftermentioned table 1, and wherein ratio a/W is 0.32, and ratio b/W is 0.165.

(3) manufacture of lead accumulator

By above-mentioned for multi-disc positive plate and the above-mentioned negative plate of multi-disc alternately overlapping across ultra-fine fibre glass cotton (AGM) dividing plate respectively, thus obtain pole plate group.

Respectively by welded together for the positive pole ear of same polarity in the single pole plate group of above-mentioned acquisition and obtain positive bus, by welded together for the negative lug of same polarity and obtain negative bus-bar.6 pole plate groups are accommodated in respectively in 6 the element cell rooms separated by spaced walls in electric groove.By the positive bus of the negative bus-bar of a pole plate group with adjacent pole plate group is welded, thus two adjacent pole plate groups are connected in series, successively each pole plate group are connected in series thus, namely unit serial battery are got up.Wherein, the ratio W/Q of gained is 0.91.

In above-mentioned multiple pole plate group be connected in series, the positive bus being arranged in a pole plate group of two pole plate groups at final two ends is connected with positive terminal, the negative bus-bar of another pole plate group is connected with negative terminal.Then, battery cover is installed on the opening of electric groove.Subsequently, pour in each element cell from liquid inlet set battery cover concentration be the sulfuric acid of 1.260g/ml as electrolyte, and to change in electric groove.After changing into, be fixed in aforesaid liquid entrance by the valve that the gas had for being produced by inside battery and pressure are discharged, thus obtain lead accumulator, the capacity of this battery is 65Ah, and rated voltage is 12V.

(4) performance of lead accumulator is evaluated

(A) the high rate discharging characteristic of lead accumulator and the mensuration of resistance to internal short-circuit

The assay method of high rate discharging characteristic is as follows:

Charge condition: charge with the constant voltage of 14.7V, at most charging 12 hours

Discharging condition: with 195A (3C) constant current discharge, until voltage is down to 9.6V

Specifically, after new product battery within manufacture 30 days being carried out the mensuration of voltage, internal resistance and weight, by with 195A (3C) constant current discharge under ambient temperature is 25 DEG C of conditions, after discharging into 9.6V termination, (unit is hour record discharge time, referred to as h), calculate discharge capacity thus to evaluate high rate discharging characteristic.

The assay method following (dendrite short circuit test) of resistance to internal short-circuit:

Under 25 DEG C of environment, carry out 2.45V constant voltage charging (maximum current is 24A) of 12 hours, then disassemble battery, estimate the number of the dendrite short circuit produced between pole plate.

In order to make dendrite short circuit easily occur, the injection rate of electrolyte being increased to 100ml/ second by common 50ml/ second, making battery thus.

(B) mensuration of the welding operation of bus-bar

The weldability of the welding operation cast welding technique (COS) of bus-bar measures, and the standard judged weldability is as follows:

×: lug and bus-bar merge substantially, but can obviously see increased number of stomata and line of demarcation.

△: start on the top of bus-bar to see longitudinal line of demarcation of lug and a small amount of spilehole, lug top and bus-bar merge.

Zero: near the central authorities of bus-bar, start the longitudinal line of demarcation can seeing lug, lug top and bus-bar merge.

◎: lug and bus-bar fuse into one, only can see the line of demarcation of some lugs a little.

(C) mensuration of vibration resistance

(1) battery is placed 12 hours after terminating by charging under the ambient temperature of 25 ± 2 DEG C, uses standard voltmeter to measure internal resistance of cell R (digital independent).

(2) battery is placed on special vibration rig, carries out vibration test by following condition.

1. full battery is supplemented; Battery is placed: upright placement

2. direction of vibration: horizontal & is vertical; Amplitude: 4mm

3. vibration frequency: 16.7HZ; Time: 1 hour

Assay method: be placed on by battery on special vibration rig, starts to carry out vibration test by above-mentioned condition, terminates rear confirmation: the internal resistance of cell and voltage (static characteristic).

Judge vibration resistance by the amplitude raised compared with the internal resistance of cell measured in above-mentioned (1) by the internal resistance of cell now measured, internal resistance raises more, shows that vibration resistance is poorer.

To each embodiment or comparative example each making 100 batteries respectively.After will vibration test having been carried out compared with before carrying out vibration test, internal resistance (IR) is risen more than 1% or open circuit voltage (OCV) battery that reduces more than 1% be judged to make the continuous damage between pole plate group and bus-bar by vibration.

The number that there occurs the battery of above-mentioned destruction is shown in Table 1 with percentage (%).

(D) assembly operation

Make 10 batteries to be measured, in the unit battery chamber of battery, insert pole plate group, because each battery has 6 element cell rooms, so add up to 60 element cells.If pole plate group can be inserted in all element cell rooms by the speed that manual manipulation is 3 seconds with each element cell room, be then judged to be that assembly operation is excellent.That is, the number that pole plate group is inserted in element cell room can not be evaluated assembly operation with the speed of 3 seconds by with manual manipulation, be designated as ◎ when being 0 by described number, when being 1 by described number, be designated as zero, when being 4 by described number, be designated as △.

(embodiment 2 ~ 5)

Except making the ratio a/W of positive plate be respectively except 0.31 ~ 0.34, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 1 and process.

(comparative example 1,2)

Except making the ratio a/W of positive plate be respectively except 0.28,0.35, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 1 and process.

In the various embodiments described above and comparative example, each inscape of pole plate and the evaluation result of lead accumulator are see the value shown in table 1.

From the result of embodiment 1 ~ 5 and comparative example 1,2 gained, by being set in the scope of 0.29 ~ 0.34 by the ratio a/W of positive plate, good high rate discharging characteristic, the welding operation of bus-bar and the resistance to internal short-circuit of battery can be realized.From the viewpoint of obtaining better high rate discharging characteristic, the welding operation of bus-bar and resistance to internal short-circuit, the above-mentioned ratio a/W of preferred positive plate is 0.31 ~ 0.33.And if the above-mentioned ratio a/W of positive plate is lower than 0.29, high rate discharging characteristic reduces; If the above-mentioned ratio a/W of positive plate is greater than 0.34, then the welding operation of bus-bar and the resistance to internal short-circuit of battery reduce.

(embodiment 6 ~ 9)

Except making the ratio b/W of positive plate be respectively except 0.14 ~ 0.205, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 3 and process.

(comparative example 3,4)

Except making the ratio b/W of positive plate be respectively except 0.13,0.215, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 3 and process.

From the result of embodiment 6 ~ 9 and comparative example 3,4 gained, by being set in the scope of 0.14 ~ 0.205 by the ratio b/W of positive plate, good high rate discharging characteristic, the welding operation of bus-bar and the resistance to internal short-circuit of battery can be realized.From the viewpoint of obtaining better high rate discharging characteristic, the welding operation of bus-bar and the resistance to internal short-circuit of battery, the above-mentioned ratio b/W of preferred positive plate is 0.15 ~ 0.18.And if the above-mentioned ratio b/W of positive plate is lower than 0.14, high rate discharging characteristic reduces; If the above-mentioned ratio b/W of positive plate is greater than 0.205, then the welding operation of bus-bar reduces.

(embodiment 10 ~ 15)

Except making ratio W/Q be respectively except 0.88 ~ 0.94, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 3 and process.

From the result of embodiment 10 ~ 15 gained, above-mentioned ratio W/Q has direct impact to the vibration resistance of battery and assembly operation, consider from vibration resistance and assembly operation these two aspects, above-mentioned ratio W/Q is suitably 0.89 ~ 0.93, is preferably 0.90 ~ 0.92.

(embodiment 16 ~ 20)

Except making the ratio a/W of negative plate be respectively except 0.28 ~ 0.34, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 3 and process.

(comparative example 5)

Except making the ratio a/W of negative plate be except 0.35, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 3 and process.

From the result of embodiment 16 ~ 20 and comparative example 5 gained, by being set in the scope of 0.29 ~ 0.34 by the ratio a/W of negative plate, good high rate discharging characteristic, the welding operation of bus-bar and the resistance to internal short-circuit of battery can be realized.From the viewpoint of obtaining better high rate discharging characteristic, the welding operation of bus-bar and the resistance to internal short-circuit of battery, preferred above-mentioned ratio a/W is 0.31 ~ 0.33.If above-mentioned ratio a/W is 0.28, although high rate discharging characteristic decreases, but still substantially meet the demands, the situation of this point and comparative example 1 is different, and this illustrates the comparing high rate discharging characteristic than value a/W and have larger impact than value a/W and negative plate of positive plate.If above-mentioned ratio a/W is greater than 0.34, then the welding operation of bus-bar and the resistance to internal short-circuit of battery reduce.

(embodiment 21 ~ 25)

Except making the ratio b/W of negative plate be respectively except 0.13 ~ 0.205, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 3 and process.

(comparative example 6)

Except making the ratio b/W of negative plate be except 0.215, other all comes obtained pole plate group and lead accumulator according to the setting identical with embodiment 3 and process.

From the result of embodiment 21 ~ 25 and comparative example 6 gained, by being set in the scope of 0.14 ~ 0.205 by the ratio b/W of negative plate, good high rate discharging characteristic, the welding operation of bus-bar and the resistance to internal short-circuit of battery can be realized.From the viewpoint of obtaining better high rate discharging characteristic, the welding operation of bus-bar and resistance to internal short-circuit, the above-mentioned ratio b/W of preferred negative pole plate is 0.15 ~ 0.18.If the above-mentioned ratio b/W of negative plate is 0.13, although high rate discharging characteristic decreases, but still substantially meet the demands, the situation of this point and comparative example 3 is different, and this illustrates the comparing high rate discharging characteristic than value b/W and have larger impact than value b/W and negative plate of positive plate.If the above-mentioned ratio b/W of negative plate is greater than 0.205, then the welding operation of bus-bar reduces.

In sum, arranged by the ratio of the width of the position of lug and the width of lug and pole plate, high rate discharging excellent can be obtained and the welding operation of bus-bar and the good lead accumulator of resistance to internal short-circuit.And then, design is optimized by the ratio of the width of pole plate (positive/negative plate) in pole plate group and the width of each element cell room, the vibration resistance of lead accumulator can be improved, pole plate is not easily deformed, and the possibility of lead accumulator generation internal short-circuit can be reduced further.

Table 1

Industrial applicibility

The utility model provides high rate discharging excellent and the welding operation of bus-bar and the good pole plate group of resistance to internal short-circuit and employ the high rate discharging excellent of this pole plate group and the good lead accumulator of the welding operation of bus-bar, resistance to internal short-circuit, vibration resistance and assembly operation.

Claims (15)

1. a lead accumulator grid, it is characterized in that, the center of the Width of lug is 0.29 ~ 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of described grid and the width W of described grid, and the ratio b/W of the width b of described lug and the width W of described grid is 0.14 ~ 0.205.

2. lead accumulator grid according to claim 1, is characterized in that, described ratio a/W is 0.31 ~ 0.33.

3. lead accumulator grid according to claim 1 and 2, is characterized in that, described ratio b/W is 0.15 ~ 0.18.

4. a lead accumulator pole plate, its active material layer comprising grid and kept by this grid, it is characterized in that, the center of the Width of lug is 0.29 ~ 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of described pole plate and the width W of described pole plate, and the ratio b/W of the width b of described lug and the width W of described pole plate is 0.14 ~ 0.205.

5. lead accumulator pole plate according to claim 4, is characterized in that, described ratio a/W is 0.31 ~ 0.33.

6. the lead accumulator pole plate according to claim 4 or 5, is characterized in that, described ratio b/W is 0.15 ~ 0.18.

7. the lead accumulator pole plate according to claim 4 or 5, is characterized in that, described pole plate is positive plate or negative plate.

8. pole plate group used by a lead accumulator, it is formed across dividing plate is alternately stacked by multi-disc positive plate and multi-disc negative plate, it is characterized in that, described positive plate is the pole plate described in any one of claim 4 ~ 6, the center of the Width of the lug of described negative plate is less than 0.34 from the ratio a/W of the distance a of the nearly end margin of Width of described negative plate and the width W of described negative plate, and the ratio b/W of the width b of the lug of described negative plate and the width W of described negative plate is less than 0.205.

9. lead accumulator pole plate group according to claim 8, is characterized in that, the described ratio a/W of described negative plate is 0.29 ~ 0.34.

10. lead accumulator pole plate group according to claim 8, is characterized in that, the described ratio a/W of described negative plate is 0.31 ~ 0.33.

Pole plate group used by lead accumulator described in 11. according to Claim 8 ~ 10 any one, it is characterized in that, the described ratio b/W of described negative plate is 0.14 ~ 0.205.

Pole plate group used by lead accumulator described in 12. according to Claim 8 ~ 10 any one, it is characterized in that, the described ratio b/W of described negative plate is 0.15 ~ 0.18.

13. 1 kinds of lead accumulators, it has multiple element cell, and this element cell is accommodated in element cell room by pole plate group and is formed together with electrolyte, and it is characterized in that, described pole plate group is the pole plate group according to any one of claim 8 ~ 12.

14. lead accumulators according to claim 13, is characterized in that, in described pole plate group, the ratio W/Q of the width W of pole plate and the width Q of described element cell room is 0.89 ~ 0.93.

15. lead accumulators according to claim 14, is characterized in that, described ratio W/Q is 0.90 ~ 0.92.