CN218918988U

CN218918988U - Portable lithium battery power supply

Info

Publication number: CN218918988U
Application number: CN202220800740.3U
Authority: CN
Inventors: 蒋仕平; 代云飞; 董志成; 万志鹏; 王大林; 施晓渝; 朱明海
Original assignee: Huafu Jiangsu Lithium Electricity New Technology Co ltd
Current assignee: Huafu Jiangsu Lithium Electricity New Technology Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2023-04-25
Anticipated expiration: 2032-04-08

Abstract

The utility model relates to a portable lithium battery power supply, which comprises a shell, wherein a telescopic handle is arranged on the surface of the shell, a lithium battery pack and a battery management system BMS are arranged in the shell, a charging interface and a discharging interface are arranged in the shell in a penetrating way, the lithium battery pack comprises a plurality of lithium iron phosphate power soft package lithium ion batteries and an assembling plate which are arranged in a fitting way, lugs of the lithium iron phosphate power soft package lithium ion batteries are sequentially connected in series through the assembling plate, the negative electrode of the lithium iron phosphate power soft package lithium ion batteries positioned at the outermost side is used as a total negative electrode to be electrically connected with the battery management system BMS, the positive electrode of the lithium iron phosphate power soft package lithium ion batteries positioned at the outermost side is used as a total positive electrode to be electrically connected with positive wires of a charging interface and a discharging interface wire harness, and the negative wires of the charging interface and the discharging interface wire harness are electrically connected with a through hole welding disc on the battery management system BMS. The utility model adopts the iron phosphate soft-package lithium battery, has excellent high-temperature performance and long service life, and can save the use cost.

Description

Portable lithium battery power supply

Technical Field

The utility model relates to a portable lithium battery power supply, and belongs to the technical field of lithium ion batteries.

Background

The power supply is a key point of driving the electric wheelchair, and the market price of the electric wheelchair is higher due to factors such as the power supply. At present, most electric wheelchairs use a ternary lithium ion battery as a power supply, and the ternary lithium ion battery has the advantages of high energy density, excellent low-temperature performance and the like, but meanwhile, the ternary lithium ion battery has poor high-temperature performance, poor safety and relatively high use cost.

Disclosure of Invention

The utility model provides a portable lithium battery power supply with excellent high-temperature performance, high safety and low use cost, which solves the defects, and the specific technical scheme is as follows:

the utility model provides a portable lithium battery power, includes the shell, the shell surface is provided with telescopic handle, be provided with lithium battery group and battery management system BMS in the shell, the shell runs through and is provided with the interface that charges and discharges, lithium battery group includes the soft packet lithium ion battery of lithium iron phosphate power and the package board of a plurality of laminating arrangements, lithium ion battery's of lithium iron phosphate power tab is established ties in proper order through the package board, is located the negative pole of the soft packet lithium ion battery of lithium iron phosphate power of outermost one side and is connected with battery management system BMS electricity as the total negative pole of lithium battery group, is located the positive pole of the soft packet lithium ion battery of lithium iron phosphate power of outermost opposite side and is connected with the positive pole line electricity of interface pencil that charges and discharges, the negative pole line of interface pencil that charges is connected with the through-hole welding dish electricity on the battery management system BMS.

Further, the housing includes a first housing and a second housing.

Further, the first shell and the second shell are fixedly connected through self-tapping screws.

Further, the handle includes base, carrying handle and two fixed columns, the carrying handle both ends all are provided with the hanging hole, the base sets up the surface at first casing placed in the middle, the recess that holds the carrying handle has been seted up on the surface of base, the through-hole that holds the hanging hole has all been seted up at the recess both ends, the hanging hole can be at the through-hole internal movement, all be provided with the fixed column of fixed hanging hole in the through-hole.

Further, the charging interface is disposed at the first housing, and the discharging interface is disposed at the second housing.

Further, EVA foam is laid in the first shell and the second shell.

Further, the first shell, the second shell and the EVA foam are all made of flame-retardant materials.

Further, the lithium battery pack is provided with a protective sleeve, and the protective sleeve is made of an epoxy resin material.

Furthermore, the assembly plate is made of PCB material and is plated with a copper soldering tin layer on the surface of the assembly plate, a plurality of lug holes are formed in the assembly plate, and lugs of the lithium iron phosphate power soft package lithium ion battery penetrate through the lug holes and are bent and welded on the copper soldering tin layer.

Further, a protective cap is arranged on the charging interface.

The beneficial effects of the utility model are as follows:

compared with a ternary lithium ion battery, the lithium iron phosphate power soft package lithium ion battery is long in service life, can save use cost, and more importantly, the safety of the lithium iron phosphate power soft package lithium ion battery can be guaranteed, and the lithium iron phosphate power soft package lithium ion battery is excellent in high-temperature performance.

The shell is provided with the telescopic lifting handle, so that on one hand, lifting, moving or carrying of the power supply is facilitated, and on the other hand, the telescopic lifting handle reduces the volume of the power supply, and when the lifting handle is not used, the lifting handle can be attached to and contracted on the shell, so that the occupied space of the power supply is reduced.

According to the electric wheelchair, the shell and EVA foam in the shell are made of flame-retardant materials, so that the safety of the electric wheelchair is further improved.

The lithium battery pack is provided with the protective sleeve, and the protective sleeve is made of an epoxy resin material and can play an insulating role.

Drawings

Figure 1 is an exploded view of the overall structure of the present utility model,

figure 2 is a schematic view of the handle structure of the present utility model,

in the figure: 1-handle, 101-base, 102-carrying handle, 103-fixed column, 2-second casing, 3-interface that charges, 4-lithium iron phosphate power soft package lithium ion battery, 5-battery management system BMS, 6-lag, 7-equipment board, 8-first casing, 9-interface that discharges, 10-EVA foam.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

As shown in fig. 1, the present utility model includes a housing in which a lithium battery pack and a battery management system BMS5 are disposed, the housing includes a first housing 8 and a second housing 2, and the first housing 8 and the second housing 2 are connected and fixed by self-tapping screws, so that the housing is conveniently opened and closed.

The first casing 8 is provided with telescopic handle 1, as shown in fig. 2, handle 1 includes base 101, carrying handle 102 and two fixed columns 103, and carrying handle 102 both ends all are provided with the hanging hole, and base 101 sets up the surface at first casing 8 in the middle, and the recess of holding carrying handle 102 has been seted up on the surface of base 101, and the through-hole of holding the hanging hole has all been seted up at the recess both ends, and the hanging hole can be at the through-hole internal movement, all is provided with the fixed column 103 of fixed hanging hole in the through-hole. When the handle 1 is used, the handle 102 is lifted by force, and the hanging hole moves out of the through hole and is fixed by the fixing column 103; conversely, the handle 102 is lowered and the hanging hole is retracted into the through hole to restore the original state. On the one hand, lifting, moving or carrying and the like of the power supply are facilitated due to the arrangement of the lifting handle, and on the other hand, the size of the power supply is reduced due to the telescopic arrangement, and when the lifting handle is not used, the lifting handle can be attached to and contracted on the shell, so that the occupied space of the power supply is reduced.

The lithium battery pack is provided with the protective sleeve 6, and the protective sleeve 6 is made of epoxy resin material, so that the lithium battery pack has an insulating effect. The lithium battery pack comprises 8 lithium iron phosphate power soft-package lithium ion batteries 4 and an assembly plate 7 which are arranged in a fitting mode, and the lugs of the lithium iron phosphate power soft-package lithium ion batteries 4 are sequentially connected in series through the assembly plate 7. The assembling plate 7 is made of PCB material, a copper-plated soldering tin layer is electroplated on the surface of the assembling plate 7, a plurality of lug holes are formed in the assembling plate 7, and lugs of the lithium iron phosphate power soft package lithium ion battery 4 penetrate through the lug holes and are bent and welded on the copper-plated soldering tin layer. The cathode of the lithium iron phosphate power soft package lithium ion battery 4 positioned at the outermost side is used as the total cathode of the lithium battery pack to be electrically connected with the battery management system BMS5, the anode of the lithium iron phosphate power soft package lithium ion battery 4 positioned at the outermost side is used as the total anode of the lithium battery pack to be electrically connected with the anode wires of the wire harnesses of the charging interface 3 and the discharging interface 9, and the cathode wires of the wire harnesses of the charging interface 3 and the discharging interface 9 are electrically connected with the through hole welding disc on the battery management system BMS 5.

The first housing 8 is provided with a charging interface 3 in a penetrating manner, and a protective cap (not shown in the figure) is provided on the charging interface 3, and the protective cap can protect the charging interface 3. The second housing 2 is provided with a discharge interface 9 therethrough. EVA foam 10 with the thickness of 3mm is paved in the first shell 8 and the second shell 2, and flame retardant materials are adopted for the first shell 8, the second shell 2 and the EVA foam 10. In case of fire, the flame-retardant material can avoid further expansion of fire to a certain extent, and the safety of the electric wheelchair is improved.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a portable lithium battery power, its characterized in that, includes the shell, the shell surface is provided with telescopic handle (1), be provided with lithium cell group and battery management system BMS (5) in the shell, the shell runs through and is provided with charge interface (3) and discharge interface (9), lithium cell group includes the flexible package lithium ion battery of lithium iron phosphate (4) and package board (7) of a plurality of laminating arrangements, the tab of lithium iron phosphate power flexible package lithium ion battery (4) is established ties through package board (7) in proper order, and the negative pole that is located the flexible package lithium ion battery of lithium iron phosphate (4) of outermost one side is connected with battery management system BMS (5) electricity as the total negative pole of lithium cell group, and the positive pole that is located the flexible package lithium ion battery of lithium iron phosphate (4) of the outermost opposite side is connected with the positive pole line electricity of charge interface (3) and discharge interface (9) pencil, the negative pole line that charges interface (3) and discharge interface (9) is connected with the battery management system BMS (5) wire harness through the hole electric plate.

2. A portable lithium battery power supply according to claim 1, characterized in that: the housing comprises a first housing (8) and a second housing (2).

3. A portable lithium battery power supply according to claim 2, characterized in that: the first shell (8) and the second shell (2) are connected and fixed through self-tapping screws.

4. A portable lithium battery power supply according to claim 2, characterized in that: handle (1) are including base (101), carrying handle (102) and two fixed columns (103), carrying handle (102) both ends all are provided with the hanging hole, base (101) set up the surface at first casing (8) in the middle, the recess that holds carrying handle (102) has been seted up on the surface of base (101), the through-hole that holds the hanging hole has all been seted up at the recess both ends, the hanging hole can be at the through-hole internal movement, all be provided with fixed column (103) of fixed hanging hole in the through-hole.

5. A portable lithium battery power supply according to claim 2, characterized in that: the charging interface (3) is arranged at the first shell (8), and the discharging interface (9) is arranged at the second shell (2).

6. A portable lithium battery power supply according to claim 2, characterized in that: EVA foam (10) is laid in the first shell (8) and the second shell (2).

7. The portable lithium battery power supply of claim 6, wherein: the first shell (8), the second shell (2) and the EVA foam (10) are made of flame-retardant materials.

8. A portable lithium battery power supply according to claim 1, characterized in that: the lithium battery pack is provided with a protective sleeve (6), and the protective sleeve (6) is made of epoxy resin materials.

9. A portable lithium battery power supply according to claim 1, characterized in that: the assembly plate (7) is made of PCB materials, copper-plated soldering tin layers are plated on the surfaces of the assembly plate (7), a plurality of lug holes are formed in the assembly plate (7), and lugs of the lithium iron phosphate power soft package lithium ion battery (4) penetrate through the lug holes and are bent and welded on the copper-plated soldering tin layers.

10. A portable lithium battery power supply according to claim 1, characterized in that: and a protective cap is arranged on the charging interface (3).