CN201518334U

CN201518334U - Cylindrical battery

Info

Publication number: CN201518334U
Application number: CN2009200660237U
Authority: CN
Inventors: 钟发平; 何策衡; 陈风
Original assignee: HUNAN CORUN NEW ENERGY CO Ltd
Current assignee: HUNAN CORUN NEW ENERGY CO Ltd
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2010-06-30
Anticipated expiration: 2019-09-25

Abstract

A cylindrical battery comprises a cylindrical battery pole group formed by the coiling of a positive plate and a negative plate which are separated by a diaphragm, a core rod is winded by the cylindrical battery pole group, the cylindrical battery pole group is characterized in that the inner end-face of a positive pole terminal at one end of the cylindrical battery pole group is connected with the positive plate end at an end opposing to the cylindrical battery pole group, and the inner end-face a negative pole terminal at the other end of the cylindrical battery pole group is connected with the negative plate end at an end opposing to the cylindrical battery pole group, thereby forming a convergent flow structure with a positive pole and a negative pole positioned at the two ends of a battery respectively. Because the positive pole and the negative pole are positioned at the two ends of the battery, current of the positive plate and the negative plate flows from the two ends, obviously improving charging and discharging performance of great current, effectively improving the heat dissipation performance of the inner of the battery, and yet improving safety performance.

Description

A kind of cylindrical battery

Technical field

The utility model relates to secondary cell, further is meant column secondary battery.

Background technology

At present because global energy is in short supply and the reinforcement of environmental consciousness, battery of electric vehicle and energy-storage battery heat have appearred in market, and jumbo secondary cell (ni-mh, NI-G, lithium electricity, plumbic acid etc.) generally adopts rectangle structure on the market, especially Ni-MH battery, all adopt rectangle structure greater than 20Ah, its reason is difficulty of high capacity cell internal heat dissipating, causes thermal runaway easily.But the secondary cell of rectangle structure intrinsic defective can not meet the need of market fully again, and the heat dispersion that the high rate during charging-discharging of existing column secondary battery and inside battery heat shed haves much room for improvement.Moreover the positive, negative electrode plate of existing secondary cell is connected with exit through welding by lug, has pad and is welded to connect part, and there have lug or connector heating to burn when big electric current or battery short circuit to be red, so that cause serious security incident such as battery scaling loss.

The utility model content

The technical problems to be solved in the utility model is, defective at the prior art existence, a kind of cylindrical battery is proposed, it is located at the two ends of battery with positive and negative electrode and the electric current of positive and negative plate is flowed from two ends, can obviously improve the high rate during charging-discharging of battery, the heat that also can more effectively improve inside battery shed performance and fail safe.

The technical solution of the utility model is, described cylindrical battery comprises the cylindrical battery utmost point group that the positive plate that separated by barrier film and negative plate are reeled and formed, described cylindrical battery utmost point group is wound on the plug, its design feature is, the inner face that is positioned at the anodal exit of described cylindrical battery utmost point group one end directly is connected with the whole end of positive plate of this cylindrical battery utmost point group opposite end, the inner face that is positioned at the negative pole exit of the described cylindrical battery utmost point group other end directly is connected with the whole end of negative plate of this cylindrical battery utmost point group opposite end, forms anodal exit thus and contacts bus structure with the face that the negative pole exit is located at the nothing welding at battery two ends respectively.

Below the utility model made further specify.

Referring to Fig. 1, cylindrical battery of the present utility model comprises the cylindrical battery utmost point group 1 that the positive plate that separated by barrier film and negative plate are reeled and formed, described cylindrical battery utmost point group 1 is wound on the plug 2, its design feature is, the inner face that is arranged in the anodal exit 3 of described cylindrical battery utmost point group 1 one ends (for example left end of Fig. 1) directly is connected with the whole end of positive plate of this cylindrical battery utmost point group 1 opposite end (left end of Fig. 1), the inner face that is arranged in the negative pole exit 4 of described cylindrical battery utmost point group 1 other end (for example right-hand member of Fig. 1) directly is connected with the whole end of negative plate of this cylindrical battery utmost point group 1 opposite end (right-hand member of Fig. 1), forms anodal exit thus and contacts bus structure with the face that the negative pole exit is located at the nothing welding at battery two ends respectively.

In the utility model,, the electric current of positive and negative plate is flowed from two ends, greatly reduce the electric current internal resistance of battery, reduced caloric value owing to the two ends that anodal and negative pole are located at battery respectively; The positive and negative electrode exit has significantly improved the high rate during charging-discharging of battery with the direct connection (no lug, nothing welding, directly face connection) of the whole pole-face (whole end face) of corresponding electrode slice end, and guaranteed battery fail safe during short circuit under big electric current and improper situation, the inside battery heat is shed with maximum area of dissipation (comprising battery two ends and shell), significantly improve the internal heat dissipating performance of battery; And, in case of necessity the outer end of described positive and negative electrode exit is made heat radiating fin structure or connects fin, the heat that then can more effectively the improve inside battery problem that sheds.Cylindrical battery utmost point group is wound on the plug, need not after having rolled up sheet, to extract the volume core (plug) on the roller, pull open barrier film during core and cause battery short circuit or micro-short circuit and cause the battery utmost point to form pagoda shape thereby avoided extracting volume.

In the utility model, battery case (box hat) two ends are suppressed twice crimping annular groove at least and made battery have enough structural rigidities in the structure that the limit is sealed in the port compacting with corresponding positive and negative electrode exit periphery, but the inside battery compression resistance is not less than 100Kg, makes battery safety obtain the qualitative leap lifting once more.

As known from the above, the utility model is a kind of cylindrical battery, and it has good high rate during charging-discharging and security performance, and lower calorific value and good heat dispersion that the inside battery heat is shed.

Description of drawings

Fig. 1 is the vertical sectional structure schematic diagram of a kind of embodiment of the utility model cylindrical battery;

Fig. 2 is the perspective view of each member composition of product shown in Figure 1 from state.

In the drawings:

1-cylindrical battery utmost point group, the 2-plug, the anodal exit of 3-,

4-negative pole exit, 5-shell, the 6-gum cover that insulate,

The 7-spring, the 8-emergency valve seat, the 9-screw,

10-safety bonnet, the 11-ball, the 12-rubber blanket,

The 13-safety valve.

Embodiment

As depicted in figs. 1 and 2, cylindrical battery described in the utility model comprises the cylindrical battery utmost point group 1 that the positive plate that separated by barrier film and negative plate are reeled and formed, and described cylindrical battery utmost point group 1 is wound on the plug 2; Cylindrical battery utmost point group 1 is contained in the shell 5, is lined with insulating cement cover 6 in this shell 5; The inner face that is positioned at the anodal exit 3 of described cylindrical battery utmost point group 1 one ends directly is connected with the whole end of positive plate of this cylindrical battery utmost point group 1 opposite end, the inner face that is positioned at the negative pole exit 4 of described cylindrical battery utmost point group 1 other end directly is connected with the whole end of negative plate of this cylindrical battery utmost point group 1 opposite end, forms anodal exit thus and contacts bus structure with the face that the negative pole exit is located at the nothing welding at battery two ends respectively.

Referring to Fig. 1, the anodal exit 3 that is positioned at cylindrical battery utmost point group 1 opposite ends is connected with the corresponding end of screw 9 with plug 2 respectively with negative pole exit 4.Described anodal exit 3 and negative pole exit 4 are metal material or the metal that is coated with resistant material.

The shell 5 of battery can be metal material (for example using box hat) or the metal that is coated with resistant material, also can be plastics or the plastics that are coated with metallic film.

One or more safety valves 13 are installed, to guarantee the safety of battery under abuse conditions in the battery one or both ends.Described safety valve 13 can adopt the prior art structure, also can adopt shown in Figure 1 being located at respectively on anodal exit 3 or the negative pole exit 4, by emergency valve seat 8, the safety valve that places the sealing of these emergency valve seat 8 ante-chambers to form with ball 11 and safe bonnet 10, described ante-chamber is communicated with the battery inner chamber through a passage.

Also the rear end of described anodal exit 3 and the rear end of negative pole exit 4 can be connected with the crimping of the twice at least annular groove 14 of 5 liang of corresponding end of shell with compacting respectively, and seal limit 15 in the compacting of the two-port of shell 5, this structure makes cell integrated enough structural rigidities that has, even can make inside battery bear the pressure that is not less than 100kg, its explosion-proof security can fully guarantee.

When battery of the present utility model used outer steel shell, this outer steel shell also can play thermolysis; An insulation spacer (as the insulation gum cover, also can adopt other heat-conducting insulation material) is set in the outer steel shell, is the uncharged garden of unique a kind of metal shell cylindrical battery, and this is very important to electric motor car.

Also can in described anodal exit 3 and negative pole exit 4, the flexible member groove be set, and in described flexible member groove, place flexible member, with contact is connected so that described anodal exit 3 keeps reliably with negative pole exit 4 with the whole end of corresponding whole end of positive plate and negative plate.Described flexible member can be spring 7 or rubber blanket 12, can also be other various suitable flexible members.

Battery of the present utility model carries out the test of aspects such as conventional capacity, the big electric current of normal temperature, cryogenic property, high-temperature behavior, security performance, self discharge by the national regulation method.The 30Ah battery of thinking the design of HEV passenger vehicle is an example, and test result shows:

A. cell satisfies the security requirement of public transport fully;

B. from the high and low temperature performance of cell, the temperature range broad of containing, from-30 ℃ to 65 ℃, even 70 ℃ can continuous firing, and the high and low temperature situation under all electric current charge and discharge greatly, adaptability to environment is stronger, can adapt to especially domestic region, area that day and night temperature is bigger;

C. from the large current charge performance, cell can satisfy 10C trickle charge, and the permanent power trickle charge of 500W; The energy bag that combines with 270 cells calculates, can accept the high-power charging of 135KW, and charging voltage is not more than 432V (the actual charging voltage 1.6V of 20 pulse per second (PPS) monomers), can more fully absorb the peak power of generator, have stronger energy recuperation ability, have more energy-saving effect.

More than the utility model is described in detail, used specific case herein principle of the present utility model and execution mode set forth, the explanation of above embodiment just is used for help understanding method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, part in specific embodiments and applications all can change; In sum, this description should not be construed as restriction of the present utility model.

Claims

1. cylindrical battery, comprise the cylindrical battery utmost point group (1) that the positive plate that separated by barrier film and negative plate are reeled and formed, described cylindrical battery utmost point group (1) is wound on the plug (2), it is characterized in that, the inner face that is positioned at the anodal exit (3) of described cylindrical battery utmost point group (1) one end directly is connected with the whole end of positive plate of this cylindrical battery utmost point group (1) opposite end, the inner face that is positioned at the negative pole exit (4) of described cylindrical battery utmost point group (1) other end directly is connected with the whole end of negative plate of this cylindrical battery utmost point group (1) opposite end, forms anodal exit thus and contacts bus structure with the face that the negative pole exit is located at the nothing welding at battery two ends respectively.

2. according to the described cylindrical battery of claim 1, it is characterized in that, one or more safety valves respectively are housed in the one or both ends of battery.

3. according to the described cylindrical battery of claim 1, it is characterized in that, the rear end of described anodal exit (3) is connected with the crimping of the twice at least annular groove (14) of same respectively shell (5) two corresponding end in the rear end of negative pole exit (4) with compacting, and seals limit (15) in the two-port compacting of shell (5).

4. according to the described cylindrical battery of claim 1, it is characterized in that, described anodal exit (3) and negative pole exit (4) are provided with the flexible member groove, place in the described flexible member groove and use so that described anodal exit (3) and negative pole exit (4) keep contacting reliably the flexible member that is connected with corresponding whole end of positive plate and the whole end of negative plate.

5. according to the described cylindrical battery of claim 3, it is characterized in that described flexible member is spring (7) or rubber blanket (12).