CN202153548U

CN202153548U - Square storage battery pack

Info

Publication number: CN202153548U
Application number: CN201120272136XU
Authority: CN
Inventors: 石建珍; 刘卫军; 周旺发; 黄庆华; 刘丽君
Original assignee: Hunan Copower EV Battery Co Ltd
Current assignee: Hunan Copower EV Battery Co Ltd
Priority date: 2011-07-29
Filing date: 2011-07-29
Publication date: 2012-02-29
Anticipated expiration: 2021-07-29

Abstract

The utility model provides a square storage battery pack. Connecting holes are arranged at the upper end and the lower end of each partition board respectively. The position of the connecting hole at the lower end of each partition board is 1/3 to 1/2 of the total height away from the partition board at the bottom of a battery casing. Two connecting devices in different shapes are arranged at the positions corresponding to the two connecting holes vertically so as to connect current collecting sheets of battery cells and obtain inner connection of the battery cells. Electric conductivity which is continuous and good in performance is provided between battery cells of the square storage battery pack, internal resistance is further reduced, and power performance of the battery pack is improved. The special positions of lower end connecting devices can effectively prevent leakage of electrolyte caused by the fact that the electrolyte in each battery cell unit flows to each other, and reliability of the battery pack is improved.

Description

The prismatic cell group

Technical field

The utility model relates to a kind of battery pack, particularly a kind of square batteries.

Background technology

For satisfying the requirement of storage battery rated power, need a plurality of electric cores be joined together to form battery pack usually, battery pack is connected to form battery module again.Contact resistance in the battery pack between the adjacent electric core is the important internal driving source of battery pack, and high internal driving means high energy consumption and heat dissipation problem, can influence the power-performance of battery.At present, when connecting two electric cores, adopt two connectors of upper and lower side; And be with a kind of connector; Form being connected of a pair of adjacent electric core like matching connector with pair of O shape ring, the internal driving of the prismatic cell group of this connected mode is higher, and the power of battery pack is lower; And the position of the lower end connecting hole in the present prismatic cell group is and the bottom that is positioned at dividing plate that the sealing property of the feasible battery pack that contacts with electrolyte reduces, and has shortened the life-span of battery pack, influences the unfailing performance of battery pack.

The utility model content

The utility model aims to provide that a kind of internal driving is lower, power is higher and the prismatic cell group of favorable sealing property.

The implementation of the utility model is following:

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 one-tenth chamber,, be positioned at the electric core at two ends at the indoor injection electrolyte of electric core; Then separate with dividing plate and housing, electric core replaces lamination each other by positive plate, barrier film, negative plate and forms; It is 1/3～1/2 place apart from battery case bottom baffles total height that a connecting hole, the position of lower end connecting hole are arranged in the top and bottom of every dividing plate; The position of two connecting holes up and down on dividing plate is installed following two difform connectors respectively, is called terminal adapter and following terminal adapter respectively, connects in order to the sheet that confluxes with electric core, connects with the inside of realizing electric core; The two electric cores that are positioned at two ends then respectively the electropolar sheet that confluxes of difference is drawn from the upper end of battery pack and become battery just/the negative pole exit, on exit, have the hole.

The last terminal adapter of the said sheet that confluxes is shaped as a kind of in " R " shape, " O " ring shape, and the connector of corresponding dividing plate lower end connecting hole is shaped as a kind of in " 7 " shape, " worker " shape or " mouth " shape.

Wherein going up terminal adapter is vertically held by cylinder-shaped end flange and taper and forms.To go up terminal adapter and insert in the connecting hole of upper end, the cylinder-shaped end flange of connector is close to a side of connecting hole, and the vertical end of taper then passes the opposite side of connecting hole; Again the O RunddichtringO is put into the tight lock nut of a screw thread, the taper of tight lock nut of this screw thread and connector is vertically held to be riveted together again.

Wherein the lower end connector has a cylindrical boss; Root around round boss has an O type seal groove; The O RunddichtringO is put into this O type seal groove; The cylindrical boss of the following terminal adapter of an electric core is passed the lower end connecting hole; Insert the following terminal adapter that is placed with the O RunddichtringO of another electric core face-to-face from the opposite side direction of this lower end connecting hole, the contact of connecting hole subtend connects in same lower end to form the round boss of two following terminal adapters, and this contact point is connected into through welding, soldering or other welding process.

Just said/negative pole exit height is higher than electric core 3-5cm; The sheet lower end of confluxing of just said/negative pole exit surpasses the position of lower end connecting hole.

With existing prismatic cell group, the utility model has the advantages that: the internal electrical core in (1) battery pack is realized 2 energisings through two kinds of difform connectors of upper and lower side; Have the conductivity of continuous function admirable between the electricity core, further reduce internal resistance, improve the power property of battery pack; (2) the following specific position of terminal adapter can prevent effectively that electrolyte in each unit electricity core from flowing each other and the leakage that causes, has improved the reliability of battery pack.

Description of drawings

Fig. 1 embodiment 1 square nickel-hydrogen accumulator group schematic appearance

Fig. 2 embodiment 1 square nickel-hydrogen accumulator group internal structure internal anatomy

Fig. 3 " R " shape connector sketch map

Fig. 4 " 7 " font connector sketch map

The different prismatic cell group of Fig. 5 charging curve comparison diagram

The different prismatic cell group of Fig. 6 discharge curve comparison diagram

Embodiment

Embodiment is just in order to explain a kind of implementation of the utility model, not as the restricted explanation to the utility model protection range.

Embodiment 1

Square nickel-hydrogen accumulator group, its schematic appearance is as shown in Figure 1, and its internal structure internal anatomy is as shown in Figure 2.Battery comprises rectangle steel housing 1, seal cover 2; Be built in the housing six electric cores 3 with conflux sheet 4; Adopt dividing plate 5 adjacent two electric cores to be separated and the independently electric separately core of one-tenth chamber,, be positioned at the electric core at two ends at the indoor injection electrolyte of electric core; Then separate with dividing plate and housing, electric core replaces lamination each other by positive plate, barrier film, negative plate and forms; It is 1/3 place apart from battery case bottom baffles total height that a connecting hole 6 and 7, the position of lower end connecting hole 7 are arranged in the top and bottom of every dividing plate; The position of two connecting holes up and down on dividing plate is installed following two difform connectors respectively, is called terminal adapter 8 and following terminal adapter 9 respectively, and wherein going up terminal adapter 8 is " R " shape connector; Following terminal adapter 9 is " 7 " shape connector, and the sheet 4 that confluxes of electric core is connected with following terminal adapter 9 with last terminal adapter 8 respectively, connects with the inside of realizing electric core; The two electric cores that are positioned at two ends are then drawn the different electropolar sheets that conflux of positive and negative electrode respectively and are become the anodal exit 10 and negative pole exit 11 of battery from the upper end of battery pack; Exit 10 and 11 height are higher than electric core 5cm; The lower end surpasses the position of lower end connecting hole, and the place, end that is higher than electric core at exit has the hole.

Fig. 3 is the structural representation of last terminal adapter 8, and connector is " R " shape, and this connector vertically holds 13 to form by end cylindrical flange 12 and taper; During installation; " R " shape connector 8 is inserted in the connecting holes 6 of batteries upper end, and what be close to upper end connecting hole 6 one sidewalls is cylinder-shaped end flange 12, taper vertically hold 13 pass the hole opposite side; Again O type circle 14 is put into a tight lock nut 15, vertically hold 13 to be riveted together tight lock nut 15 and taper again.

Fig. 4 is the following structural representation of terminal adapter 9, and connector is " 7 " font, and this connector comprises a cylindrical boss 16, around the root of round boss an O type seal groove 17 is arranged; The O RunddichtringO is put into O type seal groove 17; Scheme of installation is as shown in Figure 5, and each lower end connecting hole need use two " 7 " font connector pairings, and the cylindrical boss 16 with " a 7 " font connector 9 passes lower end connecting hole 7 from a side earlier; Round boss 16 with another " 7 " font connector passes connecting hole 7 (as shown in Figure 6) from opposite side again; The round boss contact point 18 of two " 7 " font connectors is through welding.The conflux well width of sheet of the width of two " 7 " font connectors and the used U type of electric core is consistent, and its lower end is parallel with U matrix bottom, and the upper end is a little more than the position of lower end connecting hole.

Under the same conditions, prismatic cell and the common prismatic cell group to the utility model discharges and recharges respectively, and Fig. 5 is the charging curve comparison diagram, and Fig. 6 is the discharge curve comparison diagram.Can find out that from the charging and discharging curve comparison diagram internal resistance of prismatic cell group of the present invention is significantly less than common prismatic cell group.

Claims

1. 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,, be positioned at the electric core at two ends at the indoor injection electrolyte of electric core; Then separate with dividing plate and housing; The electricity core replaces lamination each other by positive plate, barrier film, negative plate to be formed, and it is characterized in that: it is 1/3～1/2 place apart from battery case bottom baffles total height that a connecting hole, the position of lower end connecting hole are arranged in the top and bottom of every dividing plate; Up and down install following two difform connectors respectively in the position of two connecting holes at this, the sheet that confluxes of electric core is connected with two connectors up and down respectively; The two electric cores that are positioned at two ends then respectively the electropolar sheet that confluxes of difference is drawn from the upper end of battery pack and become battery just/the negative pole exit, on exit, have the hole.

2. prismatic cell group as claimed in claim 1 is characterized in that: the last terminal adapter of the said sheet that confluxes is shaped as a kind of in " R " shape, " O " ring shape, and following terminal adapter is shaped as a kind of in " 7 " shape, " worker " shape or " mouth " shape.

3. according to claim 1 or claim 2 prismatic cell group, it is characterized in that: just said/negative pole exit height is higher than electric core 3～5cm; The sheet lower end of confluxing of just said/negative pole exit surpasses the position of lower end connecting hole.