CN102339967A

CN102339967A - Prismatic cell and cell bus sheet of prismatic cell

Info

Publication number: CN102339967A
Application number: CN201110215032XA
Authority: CN
Inventors: 石建珍; 刘卫军; 周旺发; 黄庆华; 关崚
Original assignee: Hunan Copower EV Battery Co Ltd
Current assignee: NATIONAL ENGINEERING RESEARCH OF ADVANCED ENERGY STORAGE MATERIALS
Priority date: 2011-07-29
Filing date: 2011-07-29
Publication date: 2012-02-01
Anticipated expiration: 2031-07-29
Also published as: CN102339967B

Abstract

The invention provides a prismatic cell and a cell bus sheet of the prismatic cell. The bus sheet is a stripped metal conducting plate of which two opposite sides are respectively provided with conducting edges which are squarely bent in the same direction. Two sides of each cell of the prismatic cell are provided with a squarely bent bus sheet respectively, powder-free net positions of an anode plate and a cathode plate of the cell are respectively welded onto the bent conducting edges of the bus sheets of the corresponding side edges; and a connector on a clapboard is welded onto a U-shaped groove formed by enclosure of the bent conducting edges and the conducting sheet. According to the invention, the flexibility of a cell matrix material can be utilized preferably, thus improving the bus effect and reducing the inner resistance, and the conducting effect of the cell is improved, thus improving the high-power discharge performance of the prismatic cell.

Description

The electric core of prismatic cell group conflux sheet and prismatic cell group

Technical field

The present invention relates to a kind of internal part and this storage battery, particularly conflux sheet and this prismatic cell group of the electric core of prismatic cell group.

Background technology

At present; For in the power battery pack of square structure mostly each pole piece ways of connecting of electric core being two kinds; A kind of is that the pole piece structure comprises the lug of being with circular hole; Each pole-piece pole-ear is welded on the battery electrode exit after tightening through pole, and this connected mode exists mainly that internal resistance is big, pole piece confluxes the not good problem of electric conductivity.

Another kind is the end face welding structure; Before this polylith positive plate and negative plate across the barrier film lamination; Make the outstanding respectively conduct lead-in wire of lateral edges of the opposition side of positive electrode plate and negative electrode plate; Make collector plate with vertical attitude and lead-in wire position that should be outstanding near, adopt mode such as electric resistance welding that it is welded together again, form the end face weldering.The effect of confluxing of end face welding structure is better relatively than preceding a kind of extreme ear structure, but production cost is high, and difficulty of processing is big.

Summary of the invention

The electric core that the present invention aims to provide the prismatic cell group that a kind of water conservancy diversion area is big, water conservancy diversion is effective and difficulty of processing the is little sheet that confluxes, and the prismatic cell group that adopts this sheet that confluxes is provided.

The present invention realizes through following scheme:

The electric core of the prismatic cell group sheet that confluxes is the long-bar metal conducting strip, and two opposite side have the conduction limit to the equidirectional bending respectively.

Be convenient processing, preferred 90 ° of the bending angle on bending conduction limit, i.e. right angle flanging.

The prismatic cell group; Comprise rectangular case, seal cover, be built in the electric core and the sheet that confluxes in the housing, adopt dividing plate adjacent two electric cores to be separated and the independently electric separately core of formation chamber, at the indoor injection electrolyte of electric core; Be positioned at the electric core at two ends; Then separate with dividing plate and housing, electric core replaces lamination each other by positive plate, barrier film, negative plate to be formed, and the both sides of each electric core respectively have a slice to adopt the sheet that confluxes of said structure; The positive plate of electricity core, the no powder net position of negative plate are welded to the bending conduction limit of the sheet that confluxes of respective side respectively, and the connector on the dividing plate is welded to by bending conduction limit and conducting strip and surrounds in the U type inside groove that forms.

Electric core afflux compared with techniques with existing prismatic cell group; The sheet one side of confluxing of the present invention; The electricity core does not have the bending edges that powder net position is welded to the sheet that confluxes of respective side respectively with the positive plate of electric core or negative plate and realizes that pole plate confluxes after lamination, the moulding of net position, has utilized the pliability of battery basis material (Ni-MH battery such as nickel foam or Punching steel strip) better; Improve the effect of confluxing, reduced internal resistance.On the other hand; After the electricity core welds well with the sheet that confluxes; Go into shell, will pass two of electric core space bar and two above connectors welderings again and be connected to the brace U type inside groove that confluxes of electric core, realize the multiple spot energising between the adjacent two electric cores through welding manners such as electric resistance welding, Laser Welding or argon arc weldings; Further improve the conductive effect of battery, thereby improved the big multiplying power discharging property of prismatic cell group.

Description of drawings

The sheet sketch map that confluxes of Fig. 1: embodiment 1

Fig. 2: embodiment 2 prismatic cell group sketch mapes

Monomer electricity core sketch map in Fig. 3: the embodiment 2 prismatic cell groups

Embodiment

Embodiment 1

A kind of electric core of prismatic cell group sheet that confluxes, its sketch map such as Fig. 1.It is that 1, two opposite side of long-bar metal conducting strip has the conduction limit 2 to the rectangular bending of equidirectional respectively, and two conductions limit and conducting strips 1 surround and formed U type inside groove 3.

Embodiment 2

A kind of prismatic cell group, its structural representation such as Fig. 2.Comprise rectangular case 4, seal cover 5, be built in the electric core 6 of six monomers in the housing and the sheet 1 that confluxes; Adopt dividing plate 7 adjacent two electric cores to be separated and the independently electric separately core of formation chamber; At the indoor injection electrolyte of electric core; Be positioned at the electric core at two ends, then separate with dividing plate and housing, electric core replaces lamination each other by positive plate, barrier film, negative plate and forms; Two connectors 8 and 9 (only shown the structural representation of electric core of an interior monomer of battery pack and annex among Fig. 2, the structure of all the other five electric cores and annex is identical with it) are arranged on the every dividing plate 7; Each monomer electricity core 6 structural representations such as Fig. 3; The both sides of electricity core respectively have a slice to adopt the sheet 1 that confluxes of the structure of embodiment 1; The positive plate of electricity core does not have on the bendings conduction limit 2, two right angles that powder net position 10 is welded to the sheet that confluxes on one side; The negative plate of electricity core does not have connector 8 and 9 on two right angle bendings conduction limit upper spacers of the sheet that confluxes that powder net position then is welded to another side and is welded to by bending conduction limit and conducting strip and surrounds the U type inside groove 3 interior (only shown the welding situation of the sheet that confluxes of a side of an electric core of monomer among Fig. 3, the opposite side side weld relative with it connects identical with it) that forms.

Claims

1. the electric core of the prismatic cell group sheet that confluxes, it is characterized in that: the long-bar metal conducting strip, two opposite side have the conduction limit to the equidirectional bending respectively.

2. the electric core of the prismatic cell group as claimed in claim 1 sheet that confluxes is characterized in that: preferred 90 ° of the bending angle on said bending conduction limit.

3. prismatic cell group; Comprise rectangular case, seal cover, be built in the electric core and the sheet that confluxes in the housing; Adopt dividing plate adjacent two electric cores to be separated and the independently electric separately core of formation chamber; At the indoor injection electrolyte of electric core, be positioned at the electric core at two ends, then separate with dividing plate and housing; The electricity core replaces lamination each other by positive plate, barrier film, negative plate and forms; It is characterized in that: respectively there is a slice sheet that confluxes according to claim 1 or claim 2 on the both sides of each electric core, and the no powder net position of the positive plate of electric core, negative plate is welded to the bending conduction limit of the sheet that confluxes of respective side respectively, and the connector on the dividing plate is welded to by bending conduction limit and conducting strip and surrounds in the U type inside groove that forms.