CN2672883Y - Square alkaline secondary cell - Google Patents
Square alkaline secondary cell Download PDFInfo
- Publication number
- CN2672883Y CN2672883Y CNU2003201253461U CN200320125346U CN2672883Y CN 2672883 Y CN2672883 Y CN 2672883Y CN U2003201253461 U CNU2003201253461 U CN U2003201253461U CN 200320125346 U CN200320125346 U CN 200320125346U CN 2672883 Y CN2672883 Y CN 2672883Y
- Authority
- CN
- China
- Prior art keywords
- secondary cell
- alkaline secondary
- battery case
- negative pole
- pole piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y02E60/124—
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- Secondary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model discloses a square alkaline secondary cell. A positive electrode plate and a negative electrode plate are separated through a membrane and alternatively laminated to form an electrode plate, assembled in a cell case which is injected with electrolytic solution, an opening is sealed, and the square alkaline secondary cell is formed. Wherein, the positive electrode plate draws current by being connected with the positive electrode terminal of the cell through the positive electrode conductive terminal thereof; the negative electrode plate on the outer layer draws current by being contacted with the cell case; the conducting of the negative electrode in the inner layer of the electrode and the battery case is realized by the contact of the extended part of the basal body arranged in the negative electrode and the side wall of the cell case after the extended part of the basal body is bent. The electrode reaction in the square alkaline secondary cell of the utility model is uniform, and the square alkaline secondary cell has lower essential resistance for discharging and internal pressure for charging and longer cycle life.
Description
[technical field]
The utility model relates to a kind of alkaline secondary cell, relates to the square alkaline secondary cell that a kind of internal electrode reaction is even, have pressure, higher cycle life in the lower internal resistance of cell and the charging or rather.
[background technology]
Along with the extensive use of portable electrical appliance, people are more and more higher to the performance requirement as the secondary cell of above-mentioned device stand-by power supply.Along with the miniaturization of equipment, people are more and more higher for the miniaturization and the volume requirement of secondary cell, so the application of rectangular secondary cell is more and more.
The square alkaline alkaline secondary cell generally is anodal and negative pole to be separated by barrier film and the pole piece of alternately laminated formation is assembled in the battery case, through injection electrolyte, seal and make.Application number is that 98106096 Chinese patent discloses a kind of square Ni-MH battery and manufacture method thereof.Anodal and negative pole separates the also alternately laminated pole piece group that constitutes by barrier film, and pole piece group outermost contacts with shell and exposes the afflux matrix, and the outermost pole piece is curved U-shaped and makes it clamp other pole piece.This patent provides the square alkaline battery a kind of general manufacture method.For compact battery, for example positive number of poles is 3 in the pole piece group, and the sectional view of pole piece group can obtain better comprehensive performance as shown in Figure 1.
When making relatively large battery, perhaps need to adopt thinner pole piece for the electrode reaction performance that improves pole piece, thereby cause the interior positive and negative number of poles of pole piece group to increase, the positive plate number is during more than or equal to 4, need at the other folder of the positive plate of nexine with negative plate, for the situation that 4 positive poles are arranged in the pole piece group, the sectional view of pole piece group is provided with sheet negative pole 7 on positive plate 1 side of nexine as shown in Figure 2; For the situation of 5 positive poles in the pole piece group, the sectional view of pole piece group as shown in Figure 3.In Fig. 2 and Fig. 3, negative pole with respect to pole piece group ectomesoderm, the positive plate of nexine has at least the pairing negative pole of a side only to touch with the bottom connection of battery case, the improper or pole piece group of assembling cooperates not too closely situation with battery case under, make this negative pole and battery case conduction relatively poor easily, make the interior electrode reaction of battery inhomogeneous, interior voltage rise height when easily causing the internal resistance of cell, charging, cycle life is poor.
[summary of the invention]
The purpose of this utility model is that the square alkaline secondary cell that a kind of internal electrode reaction is even, have pressure, higher cycle life in the lower internal resistance of cell and the charging is provided.
The purpose of this utility model is achieved through the following technical solutions:
A kind of square alkaline secondary cell, be with positive plate, negative plate separates by barrier film and the pole piece of alternately laminated formation is assembled in the battery case, through injecting electrolyte, seal and make, wherein, described positive plate is to be connected with the anode end and projected current by its anodal conducting terminal that is provided with, outer field negative plate is by contacting and projected current with battery case, and the negative pole of nexine and the conducting of battery case are to contact with the battery case sidewall after bending by the matrix extending part that is provided with in the negative pole to realize in the described pole piece group.
Technique scheme of the present utility model further is improved to:
The negative pole of nexine in the described pole piece group, the both sides length of its bending part can be unequal.
The negative pole of described nexine has L shaped structure, and itself and the contacted side of battery case be not for applying the matrix of active material.
The negative pole of described L shaped structure, itself and the contacted side of battery case and be 0～1 away from the length ratio scope of a side of battery case.
Described negative pole is a hydrogen-occlussion alloy electrode.
The advantage of the utility model square alkaline secondary cell is: improved the electric conductivity of inside battery, improved the uniformity of inside battery electrode reaction, pressed thereby reduce in the internal resistance of cell and the charging, improved the cycle life of battery.
[description of drawings]
Fig. 1 is the sectional view of square alkaline secondary cell pole piece group in the prior art
Fig. 2 is the sectional view of square alkaline secondary cell pole piece group in the prior art
Fig. 3 is the sectional view of square alkaline secondary cell pole piece group in the prior art
Fig. 4 is the L shaped structure negative pole of a utility model embodiment sectional view
Fig. 5 is the utility model embodiment and comparative example U-shaped structure negative pole sectional view
Fig. 6 is the sectional view of the utility model square alkaline secondary cell pole piece group
Fig. 7 is the sectional view of the utility model square alkaline secondary cell pole piece group
Fig. 8 presses correlation curve figure in embodiment and the comparative example charging
Fig. 9 is embodiment and comparative example cycle life correlation curve figure
Symbol description
1-positive plate 2-barrier film 3-negative electrode active material
4-negative pole matrix 5-U shape structure negative pole 6-L shape structure negative pole
7-sheet negative pole
[embodiment]
Below the utility model is elaborated.
For the square alkaline secondary cell of positive plate number more than or equal to 4, please refer to Fig. 4-7, positive plate 1 is encapsulated in the barrier film 2, be provided with matrix 4 extending parts in the pole piece group in the negative pole of nexine, matrix 4 extending parts contact with battery case (not shown) sidewall after bending, thereby have realized the conducting of this negative pole and battery case, and the uniformity of inside battery electrode reaction is improved, press thereby reduced in the internal resistance of cell and the charging, improved the cycle life of battery.
According to battery actual fabrication situation, the both sides length of matrix 4 bending parts can be unequal.
The negative pole of nexine can have L shaped structure in the pole piece group, and itself and the contacted side of battery case are the coating negative electrode active material 3 of matrix 4 both sides for not applying the matrix of active material with the part of positive plate 1 corresponding formation electrode pair.
The negative pole of L shaped structure, its minor face is 0～1 with the length ratio scope on long limit, can make pole piece can reduce the volume of pole piece group when guaranteeing pole piece and battery case conductivity, saves the space.
The negative pole of L shaped structure can adopt following method to make: the negative plate broad ways that the two sides is scribbled negative electrode active material 3 is folded in half into U-shaped from the centre, scrape the negative electrode active material that U-shaped falls a dogleg section and a side negative pole matrix 4, expose negative pole matrix 4, and the negative pole matrix 4 of this side cut out to preseting length, just obtain L shaped structure negative pole 6, as shown in Figure 5.
Be that the utility model is described in further detail for example with square Ni-MH battery below.
[embodiment]
Anodal making: nickel hydroxide, nickel powder, cobalt protoxide etc. are mixed by a certain percentage, and with CMC and water furnishing mixed slurry, slurry is packed in the foaming nickel, drying, roll-in, to cut into 0.6～0.8mm thick, wide 14.2mm, the positive plate of long 25.5mm.Then this positive plate is encapsulated in the modified polypropene diaphragm bag.
The making of negative pole: with AB
5Alloy and nickel powder, CMC, PVA and water etc. are mixed into slurry by a certain percentage, be coated on the nickel plating perforated steel ribbon, oven dry cuts into the bar shaped pole piece, and this pole piece is folded in half into U-shaped along the length aspect, wipe the monolateral attached material in the outside off, make the inboard thick 0.40～0.50mm of being, the thick 0.20～0.30mm in the outside, pole piece length overall 52mm, the U-shaped negative pole 5 of wide 14.2mm, this negative pole can place the both sides of pole piece group and outer field positive pole.
Wipe the attached material on above-mentioned negative pole one side both sides off, expose steel band, and it is cut out to 12～15mm, make thickness 0.40～0.50mm, pole piece length overall 37～40mm, wide 14.2mm, attached material one side pole length of a film 26mm has so just made L type structure negative pole.
Battery is made: be encapsulated in positive pole in the diaphragm bag, two U-shaped structure negative poles and the L shaped structure negative pole of a slice with four and carry out stacked formation pole piece group, the cross section of this pole piece group as shown in Figure 6, this pole piece is assembled in the rectangle steel shell of an end opening, through fluid injection, seal, making nominal capacity is the square Ni-MH battery of 550mAh.
[comparative example]
The making of nickel positive pole: used active material slurry is identical with embodiment, but that prepared pole piece is of a size of 0.8～1.0mm is thick, wide 14.2mm, the positive plate of long 25.5mm.
The making of hydrogen-storage alloy negative pole: used active material slurry is identical with embodiment, and pole piece is a U-shaped structure 5, and the inboard is thick to be 0.50mm, the thick 0.20～0.30mm in the outside, pole piece length overall 52mm, wide 14.2mm.
Battery is made: with three be encapsulated in the positive pole in the diaphragm bag, two U-shaped structure negative poles are stacked by mode shown in Figure 1, form the pole piece group, in the rectangle steel shell of an end opening of packing into, through fluid injection, seal, making nominal capacity is the square Ni-MH battery of 550mAh.
[Performance Detection]
Discharge internal resistance: embodiment and comparative example battery were charged 7 hours with 0.2C, shelved 15 minutes, be discharged to 1.0V with 0.5C again.The record discharge attitude internal resistance of cell.The results are shown in Table 1.
Table 1
| Discharge internal resistance (m Ω) | Embodiment one | Comparative example |
| Minimum value | 25.1 | 40.4 |
| Maximum | 29.0 | 48.3 |
| Mean value | 26.6 | 43.7 |
Press in the charging: embodiment and comparative example battery were charged 120 minutes with 1C, and the record inner pressure of battery obtains the line of buckling in the battery charge with the variation in charging interval.The result as shown in Figure 8.
Cycle life: embodiment and comparative example battery were charged 75 minutes with 1C, shelved 15 minutes, be discharged to 1.0V with 1C again, shelved 15 minutes.Circulate by the above system of discharging and recharging, the record discharge capacity obtains cycle life figure, as shown in Figure 9 with the variation of cycle-index.
As can be seen from Table 1, for the identical square alkaline secondary cell of nominal capacity, square alkaline secondary cell of the present utility model has lower discharge internal resistance; As can be seen from Figure 8, for the identical square alkaline secondary cell of nominal capacity, square alkaline secondary cell of the present utility model has in the lower charging presses; As can be seen from Figure 9, for the identical square alkaline secondary cell of nominal capacity, square alkaline secondary cell of the present utility model has higher cycle life.
The structure of the utility model square alkaline secondary cell pole piece group is not limited to situation expressed in embodiment and the accompanying drawing, and other structure that meets technique scheme is also at the row of protection.
Therefore, the utility model square alkaline secondary cell, internal-response is even, has in lower discharge internal resistance and the charging to press, and has higher cycle life.
Claims (5)
1. square alkaline secondary cell, be with positive plate, negative plate separates by barrier film and the pole piece of alternately laminated formation is assembled in the battery case, through injecting electrolyte, seal and make, wherein, described positive plate is to be connected with the anode end and projected current by its anodal conducting terminal that is provided with, outer field negative plate is characterized in that by contacting and projected current with battery case: the negative pole of nexine and the conducting of battery case are to contact with the battery case sidewall after bending by the matrix extending part that is provided with in the negative pole to realize in the described pole piece group.
2. according to the square alkaline secondary cell described in the claim 1, it is characterized in that: the negative pole of nexine in the described pole piece group, the both sides length of its bending part can be unequal.
3. according to the square alkaline secondary cell described in claim 1 or 2, it is characterized in that: the negative pole of described nexine has L shaped structure, and itself and the contacted side of battery case be not for applying the matrix of active material.
4. according to the square alkaline secondary cell described in the claim 3, it is characterized in that: the negative pole of described L shaped structure, itself and the contacted side of battery case and be 0～1 away from the length ratio scope of a side of battery case.
5. according to the square alkaline secondary cell described in the claim 1, it is characterized in that: described negative pole is a hydrogen-occlussion alloy electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201253461U CN2672883Y (en) | 2003-12-26 | 2003-12-26 | Square alkaline secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201253461U CN2672883Y (en) | 2003-12-26 | 2003-12-26 | Square alkaline secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2672883Y true CN2672883Y (en) | 2005-01-19 |
Family
ID=34476761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201253461U Expired - Lifetime CN2672883Y (en) | 2003-12-26 | 2003-12-26 | Square alkaline secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2672883Y (en) |
-
2003
- 2003-12-26 CN CNU2003201253461U patent/CN2672883Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131226 Granted publication date: 20050119 |