CN210668626U

CN210668626U - Lithium iron phosphate battery and lithium ion capacitor parallel module device

Info

Publication number: CN210668626U
Application number: CN201921687369.9U
Authority: CN
Inventors: 李晶; 陈端云; 赵丹; 李清湘; 王国华; 易国星
Original assignee: Shenzhen Nonfemet Technology Co ltd
Current assignee: Shenzhen Nonfemet Technology Co ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-06-02
Anticipated expiration: 2029-10-10

Abstract

The utility model discloses a lithium iron phosphate battery and lithium ion capacitor parallel module device, which comprises a plurality of module units which are sequentially connected in series and arranged side by side through a PCB connecting plate; the module unit comprises a shell, a lithium iron phosphate battery and a lithium ion capacitor; the shell is open-top's square cavity structure, and PCB connecting plate lid closes on the shell, and lithium iron phosphate battery and lithium ion capacitor are parallelly connected and all install in the shell, and the utmost point ear that lithium iron phosphate battery and lithium ion capacitor homopolar passes the PCB connecting plate, and the utmost point ear that homopolar worn out turns over the back welding respectively to both sides on the PCB connecting plate. The utility model provides a parallel module device, the combination mode is nimble, simple, and the module has lithium iron phosphate battery and lithium ion capacitor advantage concurrently, can alleviate the module in the use heavy current to lithium iron phosphate battery impact, makes module device life show the improvement; meanwhile, in the series connection process, the parallel welding points do not need to be welded for the second time, and the defects and the rejection rate are obviously reduced.

Description

Lithium iron phosphate battery and lithium ion capacitor parallel module device

Technical Field

The utility model relates to a battery capacitor field especially relates to a lithium iron phosphate battery and parallelly connected module device of lithium ion capacitor.

Background

The lithium iron phosphate battery is a lithium ion battery using lithium iron phosphate as a positive electrode material. The anode material of the lithium ion battery mainly comprises lithium cobaltate, lithium manganate, lithium nickelate, ternary material, lithium iron phosphate and the like. Lithium cobaltate is a positive electrode material used by most lithium ion batteries at present.

A lithium ion Capacitor (Li-ion Capacitor, abbreviated as LIC), also called Electrochemical Hybrid Capacitor (EHC), asymmetric electrochemical Capacitor, is a novel energy storage element between a super Capacitor and a battery, and has higher specific capacity and specific energy than the super Capacitor and higher power density than the battery.

The lithium iron phosphate battery has the advantages of high safety and long cycle, and the lithium ion capacitor has the advantages of high multiplying power and long service life. At present, no parallel module device integrating a lithium iron phosphate battery and a lithium ion capacitor is available in the market, so that the parallel module has the advantages of the lithium iron phosphate battery and the lithium ion capacitor. In addition, in order to improve module operating voltage, traditional battery and condenser are parallelly connected, use nickel strap or copper nickel strap to establish ties after parallelly connected, and parallelly connected process electric core utmost point ear welding adopts laser welding, uses nickel strap or copper nickel strap laser welding again during the series connection, easily causes solder joint position, overwelding, welds the scheduling problem of wearing, causes electric core harmfully, scrap.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a parallel module device of lithium iron phosphate battery and lithium ion capacitor, which has the advantages of both lithium iron phosphate battery and lithium ion capacitor, and can alleviate the impact of large current on the lithium iron phosphate battery during the use of the module, so as to significantly improve the service life of the module device; the parallel welding points do not need to be welded for the second time, so that the defects and the rejection rate of the battery cell are reduced.

In order to realize the above purpose, the utility model discloses a technical scheme:

a parallel module device of a lithium iron phosphate battery and a lithium ion capacitor comprises a plurality of module units which are sequentially connected in series and are arranged side by side through a PCB connecting plate;

the module unit comprises a shell, a lithium iron phosphate battery and a lithium ion capacitor; the shell is open-top's square cavity structure, PCB connecting plate lid closes on the shell, lithium iron phosphate battery and lithium ion capacitor are parallelly connected and all install in the shell, the homopolar utmost point ear of lithium iron phosphate battery and lithium ion capacitor passes PCB connecting plate, the utmost point ear of wearing out of homopolar turns over the back welding to both sides respectively on the PCB connecting plate.

Furthermore, a pole lug penetrating port is formed in the PCB connecting plate.

Furthermore, a plurality of bolt holes are formed in the shell and the PCB connecting plate, and bolts penetrate through the bolt holes to connect the shell and the PCB connecting plate.

Further, the PCB connecting plate is a copper plate.

Further, the shell is an aluminum alloy shell.

The utility model has the advantages that:

the utility model provides a parallelly connected module device, the compound mode is nimble, simple, and the module has lithium iron phosphate battery and lithium ion capacitor advantage concurrently, can alleviate heavy current in the module use and to the impact of lithium iron phosphate battery when using, makes module device life show the improvement.

The utility model provides a parallelly connected module device, the utmost point ear of lithium iron phosphate battery and lithium ion capacitor homopolar passes the PCB connecting plate, and the utmost point ear of wearing out homopolar turns over the back welding respectively to both sides and rolls over on the PCB connecting plate, and the parallelly connected welding point of series connection in-process only needs to weld once, need not to carry out secondary weld, and module equipment easy operation, and bad and disability rate are showing and are descending.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the module unit of the present invention after connecting with a PCB connecting board;

fig. 3 is a schematic structural diagram of a module unit according to the present invention;

FIG. 4 is a schematic structural view of the PCB connecting plate of the present invention;

in the figure: 1. a PCB connecting plate; 2. a module unit; 3. a housing; 4. a lithium iron phosphate battery; 5. a lithium ion capacitor; 6. the pole lug penetrates through the hole; 7. bolt holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further explained with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

A parallel module device of a lithium iron phosphate battery and a lithium ion capacitor comprises a plurality of module units 2 which are sequentially connected in series and arranged side by side through a PCB connecting plate 1, as shown in figures 1-4;

the module unit 2 comprises a shell 3, a lithium iron phosphate battery 4 and a lithium ion capacitor 5; the shell 3 is open-top's square cavity structure, and 1 lid of PCB connecting plate closes on shell 3, and lithium iron phosphate battery 4 and lithium ion capacitor 5 are parallelly connected and all install in shell 3, and the utmost point ear of lithium iron phosphate battery 4 and lithium ion capacitor 5 homopolar passes PCB connecting plate 1, and the utmost point ear that the homopolar was worn out turns over the back welding respectively to both sides on PCB connecting plate 1.

In this embodiment, connect lithium iron phosphate battery 4 and lithium ion capacitor 5 in parallel in shell 3, form module unit 2, connect a plurality of module units 2 in series in proper order through PCB connecting plate 1 again, form parallel module device, the compound mode is nimble simple, this parallel module device has lithium

iron phosphate battery

4 and 5 advantages of lithium ion capacitor concurrently, can alleviate heavy current when using and assault lithium iron phosphate battery in the module use, make module device life show the improvement. The lithium iron phosphate battery 4 and the lithium ion capacitor 5 in this embodiment are both conventional lithium batteries and capacitors in the prior art, and for example, a lithium iron phosphate battery with a model number of 16181217 and a lithium ion capacitor with a model number of 16181217, which are manufactured by seine green xin power supply limited, sichuan, may be used. The PCB connecting plate 1 comprises a positive pole and a negative pole which do not influence each other.

The homopolar pole ear of lithium iron phosphate battery 4 and lithium ion capacitor 5 of this embodiment passes PCB connecting plate 1, and the pole ear that the homopolar was worn out turns over the back welding on PCB connecting plate 1 to both sides respectively, and the parallel connection welding point need not to carry out secondary welding among the series connection process, and bad and disability rate are showing and are descending.

As the optimization scheme of this embodiment, the PCB connecting plate 1 is provided with a tab penetrating port 6 so as to facilitate the penetration of the positive tab and the negative tab of the lithium iron phosphate battery 4 and the lithium ion capacitor 5.

As the optimization scheme of this embodiment, a plurality of bolt holes 7 are provided on the housing 3 and the PCB connecting plate 1, and bolts pass through the bolt holes 7 to connect the housing 3 and the PCB connecting plate 1, so as to fix the lithium iron phosphate battery 4 and the lithium ion capacitor 5 in the housing 3.

As an optimized scheme of this embodiment, the PCB connecting board 1 is a copper board, and two module units 2 are connected in series.

As a preferred embodiment of the present invention, the housing 3 is an aluminum alloy housing.

For better understanding, the utility model discloses, following is to the theory of operation of the utility model make a complete description:

when the module unit 2 is installed, the lithium iron phosphate battery 4 and the lithium ion capacitor 5 are both placed in the housing 3, and the positive electrode tabs and the negative electrode tabs of the lithium iron phosphate battery 4 and the lithium ion capacitor 5 are respectively located on two sides of the housing 3 in the length direction, as shown in fig. 3, the left side is all the positive electrode tabs, the right side is all the negative electrode tabs, and the battery and the capacitor are connected in parallel.

When a plurality of module units 2 are connected in series, the positive and negative electrodes of two adjacent module units 2 need to be connected in series by the PCB connecting plate 1. Install PCB connecting plate 1 at the opening part of shell 3, anodal utmost point ear is all worn out from utmost point ear through-put 6 on the left of PCB connecting plate 1, and negative pole utmost point ear is all worn out from utmost point ear through-put 6 on the right of PCB connecting plate 1 to pass bolt hole 7 with the bolt and connect shell 3 and PCB connecting plate 1, with lithium iron phosphate battery 4 and lithium ion capacitor 5 in the fixed shell 3, as shown in fig. 2.

Meanwhile, the PCB connecting plate 1 is connected with the different poles of the PCB connecting plate 1 of the next module unit 2, two lugs penetrated out from each lug penetrating port 6 are respectively turned over towards two sides, the lugs are welded on the PCB connecting plate 1 by laser welding after being turned over, the two module units 2 are connected in series, as shown in figure 1, the parallel welding points in the series connection process only need to be welded once, secondary welding is not needed, and the electricity core is poor and the rejection rate is remarkably reduced.

The homopolar utmost point ear that 6 wore out of the utmost point ear of each PCB connecting plate 1 wears out, all welds on PCB connecting plate 1, makes lithium iron phosphate battery 4 and lithium ion capacitor 5 parallelly connected, and the module device after parallelly connected has lithium iron phosphate battery and lithium ion capacitor advantage concurrently, can alleviate the impact of heavy current to lithium iron phosphate battery in the module use when using, makes module device life show the improvement.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a lithium iron phosphate battery and parallelly connected module device of lithium ion capacitor which characterized in that: comprises a plurality of module units (2) which are sequentially connected in series and arranged side by side through a PCB connecting plate (1);

the module unit (2) comprises a shell (3), a lithium iron phosphate battery (4) and a lithium ion capacitor (5); the shell (3) is a square cavity structure with an open top, the PCB connecting plate (1) covers the shell (3), the lithium iron phosphate battery (4) and the lithium ion capacitor (5) are connected in parallel and are all installed in the shell (3), the homopolar lugs of the lithium iron phosphate battery (4) and the lithium ion capacitor (5) penetrate through the PCB connecting plate (1), and the lugs which penetrate out homopolar are respectively welded on the PCB connecting plate (1) after being turned over to two sides.

2. The parallel module apparatus of claim 1, wherein: and a lug penetrating port (6) is formed in the PCB connecting plate (1).

3. The parallel module apparatus of claim 1, wherein: a plurality of bolt holes (7) are formed in the shell (3) and the PCB connecting plate (1), and bolts penetrate through the bolt holes (7) to connect the shell (3) and the PCB connecting plate (1).

4. The parallel module apparatus of claim 1, wherein: the PCB connecting plate (1) is a copper plate.

5. The parallel module apparatus of claim 1, wherein: the shell (3) is an aluminum alloy shell.