CN214099715U

CN214099715U - An efficient charging lithium battery

Info

Publication number: CN214099715U
Application number: CN202023038653.9U
Authority: CN
Inventors: 金珂; 陈丽丹; 吴真伟; 潘建云
Original assignee: Zhejiang Kandi Smart Battery Swap Technology Co Ltd
Current assignee: Zhejiang Kandi Smart Battery Swap Technology Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-08-31
Anticipated expiration: 2030-12-16

Abstract

The utility model provides a high-efficient lithium cell that charges belongs to lithium cell technical field. The lithium battery solves the problems that the conductivity of the electrolyte is greatly reduced, the temperature is low, the ionic activity is reduced, the charging efficiency of the battery is not high and the like in the existing lithium battery in a low-temperature environment. The utility model discloses a framework and setting are at the inside a plurality of lithium cell of framework, the upper end opening of framework, opening part lid has closed an insulation cover plate, a serial communication port, be equipped with an electrical heating membrane on the diapire in the framework, still be equipped with a temperature sensor in the framework. The utility model has the advantages of through at inside electric heating membrane and the temperature sensor that sets up of framework, before charging, detect the temperature when temperature sensor and be less than best use temperature, electric heating membrane begins to heat, charges after heating the temperature of lithium cell to best use temperature again, has improved the charge efficiency of lithium cell greatly.

Description

High-efficient lithium cell that charges

Technical Field

The utility model belongs to the technical field of the lithium cell, a high-efficient lithium cell that charges is related to.

Background

In winter, since the battery capacity and the driving mileage are slightly reduced, the battery pack needs to be charged at a place where the ambient temperature is high in winter, and the battery pack can be fully charged. The optimal service temperature of the lithium battery is 0-35 ℃, the activity of lithium ions in the battery is reduced under a low-temperature environment, and the discharge capacity is weakened, so that the service time of the battery is shortened. If exposed to a low temperature environment for a long time, the battery may be irreversibly damaged.

The temperature is one of the influences of environmental factors on the mobile phone battery, and under a low-temperature environment, the conductivity of the electrolyte is greatly reduced, the temperature is low, the ionic activity is reduced, and the charging efficiency of the battery is not high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems existing in the prior lithium battery, and providing a lithium battery capable of improving the charging efficiency under the low-temperature environment.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a lithium cell that high efficiency was charged, includes the framework and sets up at the inside a plurality of lithium cell of framework, the upper end opening of framework, opening part lid has closed an insulating cover board, its characterized in that, be equipped with an electrical heating membrane on the diapire in the framework, still be equipped with a temperature sensor in the framework.

In foretell lithium cell that high efficiency was charged, framework internal fixation frame be equipped with the installing support, a plurality of installing supports will be wide internal partitioning three cavities of placing, each is placed and all is equipped with two sets of lithium cell in the cavity.

In the above-mentioned lithium battery with high charging efficiency, the two ends of each lithium battery unit are respectively provided with an anode connecting end and a cathode connecting end, and the anode connecting end and the cathode connecting end between two adjacent lithium battery units are electrically connected through a conductive connecting sheet.

In the above lithium battery with high charging efficiency, a charging port and a discharging port are arranged on the outer side wall of the frame body, and one of the positive connecting end and one of the negative connecting end of each lithium battery unit in the frame body are respectively electrically connected with the charging port and the discharging port through a conductive connecting plate.

In the above lithium battery with high charging efficiency, the insulating cover plate comprises an epoxy resin plate. The epoxy resin board is an excellent insulating material with high dielectric property, surface leakage resistance and electric arc resistance.

In foretell lithium cell that high efficiency was charged, lithium cell include battery module and mounting panel, a plurality of battery modules stack side by side, the mounting panel has two and symmetry respectively and places in the both sides of battery module, a plurality of battery modules are pressed from both sides tightly and are fixed between two mounting panels.

In the above-mentioned lithium battery that charges with high efficiency, the mounting panel on open and to have a plurality of mounting holes, it has the through-hole corresponding with above-mentioned mounting hole position to open on the battery module, an installation pole passes through-hole and mounting hole, the both ends of installation pole are fixed respectively to be set up on two mounting panels.

In the above-mentioned lithium battery that charges with high efficiency, the mounting panel on be equipped with a plurality of installation corner fittings, lithium cell passes through this installation corner fittings and fixes the setting in the frame.

Compared with the prior art, the utility model discloses a set up electrical heating membrane and temperature sensor inside the framework, before charging, detect the temperature and be less than best use temperature when temperature sensor, the electrical heating membrane begins to heat, charges after heating the temperature of lithium cell to best use temperature again, has improved the charge efficiency of lithium cell greatly.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of the present invention with the insulating cover removed;

fig. 3 is a schematic view of a lithium battery cell mounted in the frame body of the present invention;

fig. 4 is a schematic structural diagram of a lithium battery unit according to the present invention;

fig. 5 is a schematic structural view of the battery module according to the present invention;

fig. 6 is a schematic structural diagram of the positive bus bar of the present invention;

fig. 7 is a schematic structural view of the fusing conductive sheet of the present invention.

In the figure, 1, frame; 2. a lithium battery cell; 3. an insulating cover plate; 4. mounting a bracket; 5. a conductive connecting sheet; 6. a conductive connection plate; 7. a battery module; 8. a battery fixing plate; 9. a through hole; 10. mounting a rod; 11. mounting a corner fitting; 12. a positive bus bar; 13. a negative bus bar; 14. a cylindrical battery; 15. fusing the conducting plate; 16. a welding point; 17. welding the hole; 18. connecting sheets; 19. a left half part; 20. a right half portion; 21. a connecting portion; 22. mounting a sheet; 23. a U-shaped mounting groove; 24. and (7) mounting the plate.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, a high-efficient lithium cell that charges, including framework 1 and a plurality of lithium cell 2 of setting in framework 1 inside, the upper end opening of framework 1, an insulating cover plate 3 has been closed to the opening part lid, insulating cover plate 3 include the epoxy board. The epoxy resin board is an excellent insulating material with high dielectric property, surface leakage resistance and electric arc resistance. An electric heating film is arranged on the inner bottom wall of the frame body 1, and a temperature sensor is further arranged in the frame body 1. The internal fixation frame of framework 1 in be equipped with installing support 4, a plurality of installing support 4 will be widened internal partitioning and become three cavity of placing, each is placed and all is equipped with two sets of lithium cell unit 2 in the cavity.

The two ends of each lithium battery unit 2 are respectively provided with an anode connecting end and a cathode connecting end, and the anode connecting end and the cathode connecting end between every two adjacent lithium battery units 2 are electrically connected through a conductive connecting sheet 5. The outer side wall of the frame body 1 is provided with a charging port and a discharging port, and one of the positive connecting end and the negative connecting end of each lithium battery unit 2 in the frame body 1 is electrically connected with the charging port and the discharging port through a conductive connecting plate 6 respectively.

As shown in fig. 4, the lithium battery unit 2 includes the battery modules 7 and the mounting plates 24, the plurality of battery modules 7 are stacked in parallel, two of the mounting plates 24 are respectively and symmetrically disposed on two sides of the battery modules 7, and the plurality of battery modules 7 are clamped and fixed between the two mounting plates 24. The mounting plate 24 is provided with a plurality of mounting holes, the battery module 7 is provided with through holes 9 corresponding to the mounting holes, a mounting rod 10 penetrates through the through holes 9 and the mounting holes, and two ends of the mounting rod 10 are respectively fixedly arranged on the two mounting plates 24. The mounting plate 24 is provided with a plurality of mounting corner pieces 11, and the lithium battery unit 2 is fixedly arranged in the frame body 1 through the mounting corner pieces 11.

As shown in fig. 5, the battery module 7 includes a positive bus bar 12, a negative bus bar 13, a cylindrical battery 14 and a battery fixing plate 8, a plurality of placing cavities are arranged in the battery fixing plate 8 for placing the cylindrical battery 14, two battery fixing plates 8 are symmetrically arranged, two ends of the cylindrical battery 14 are clamped and fixed in the placing cavities and clamped by the two battery fixing plates 8, the positive bus bar 12 and the negative bus bar 13 are arranged outside the battery fixing plate 8, the positive bus bar 12 is arranged at one end close to the positive pole of the cylindrical battery 14, the negative bus bar 13 is arranged at one end close to the negative pole of the cylindrical battery 14, the positive bus bar 12 and the negative bus bar 13 are provided with fusing conductive sheets 15 corresponding to the placing cavities one by one, and the conductive sheets 15 on the positive bus bar 12 and the negative bus bar 13 are respectively fused with the positive pole and the negative pole of the cylindrical battery 14 and welded with the negative pole. The positive bus bar 12, the negative bus bar 13 and the battery fixing plate 8 are all provided with the through holes 9, and the through holes 9 are in one-to-one correspondence with each other. The upper and lower end faces of the battery fixing plate 8 near the positive end of the cylindrical battery 14 are marked with "+" marks, and the upper and lower end faces of the battery fixing plate 8 near the negative end of the cylindrical battery 14 are marked with "-" marks.

As shown in fig. 6, the fuse conductive sheet 15 is provided with two welding points 16. The positive electrode bus board 12 and the negative electrode bus board 13 are provided with welding holes 17 corresponding to the placing cavities one by one, the fusing conductive sheet 15 is arranged in the welding holes 17, and the upper end of the fusing conductive sheet 15 is provided with a connecting sheet 18 and is connected with the side wall of the welding holes 17 through the connecting sheet 18. The upper ends of the positive bus bar 12 and the negative bus bar 13 are respectively provided with an installation piece 22, the installation piece 22 is folded towards one side of the battery fixing plate 8, the upper end of the battery fixing plate 8 is provided with a U-shaped installation groove 23 corresponding to the installation piece 22 in position, and the positive bus bar 12 and the negative bus bar 13 are clamped in the U-shaped installation groove 23 of the battery fixing plate 8 through the installation piece 22 and are fixedly connected with the installation piece 22.

As shown in fig. 7, the fusing conductive sheet 15 includes a left half 19 and a right half 20, a gap is left between the left half 19 and the right half 20, and a welding point 16 is disposed on each of the left half 19 and the right half 20. The fusing conductive tab 15 further includes a connecting portion 21 for connecting the left half 19 and the right half 20, the connecting portion 21 is n-shaped, the upper end of the connecting portion 21 is connected to the side wall of the welding hole 17 through the connecting tab 18, and both ends of the lower end of the connecting portion 21 are connected to the left half 19 and the right half 20, respectively. The left half 19 and the right half 20 have the same width, and both ends of the lower end of the connecting portion 21 have a width smaller than that of the left half 19. When the left half 19 and the right half 20 are welded to the cylindrical battery 14, if the left half 19 and the right half 20 are integrally connected, when one of the welding points 16 is welded, the other welding point 16 is deformed and displaced, and the left half 19 and the right half 20 are spaced apart from each other, and each has a certain deformation space by the connecting portion 21 when welded. The fusing conductive sheet 15 is made of nickel. The melting point of nickel is low, which can play a good role in self-fusing protection and has low price.

The working principle of the utility model is as follows:

1. inserting one end of the positive electrode of the cylindrical battery 14 into a placing cavity of a battery fixing plate 8 engraved with a "+" mark, and welding the positive electrode of the cylindrical battery 14 with a fusing conducting strip 15 on a positive electrode bus plate 12 on the outer side of the battery fixing plate 8; correspondingly inserting the battery fixing plate 8 engraved with the mark into one end of the cathode of the cylindrical battery 14, and welding the cathode of the cylindrical battery 14 with the fusing conductive sheet 15 on the cathode bus plate 13 outside the battery fixing plate 8, so that the welding of the battery module 7 is completed;

2. sequentially sleeving six welded battery modules 7 into the mounting rod 10 along the axial direction of the through hole 9, wherein the positive and negative poles of the cylindrical batteries 14 in each battery module 7 are in the same direction and can be distinguished by + and-engraved on the battery fixing plate 8, then sleeving the battery fixing plates 8 at two ends of the mounting rod 10, clamping the six battery modules 7 through the two battery fixing plates 8 and fixing the six battery modules through bolts, and thus finishing the installation of the lithium battery unit 2;

3. the lithium battery cells 2 are fixed in the corresponding housing chambers in the housing 1 by the corner fittings 11 on the battery fixing plate 8, and the lithium battery cells 2 in the housing 1 are electrically connected.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e. in a manner equivalent to "including at least … …", and not in a closed manner, i.e. in a manner not to be interpreted as "including … … only".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An efficient charging lithium battery, comprising a frame body (1) and several lithium battery cells (2) arranged inside the frame body (1), the upper end of the frame body (1) is open, and the opening is covered with a The insulating cover plate (3) is characterized in that an electric heating film is arranged on the inner bottom wall of the frame body (1), and a temperature sensor is also arranged in the frame body (1).

2. The highly efficient charging lithium battery according to claim 1, wherein the frame body (1) is provided with a mounting bracket (4) in a fixed frame, and several mounting brackets (4) separate the inside of the wide body Three placement chambers are formed, and each placement chamber is provided with two sets of lithium battery units (2).

3. A kind of high-efficiency charging lithium battery according to claim 1, is characterized in that, the two ends of described lithium battery unit (2) are respectively provided with a positive terminal and a negative terminal, adjacent two lithium battery units The positive terminal and the negative terminal between (2) are electrically connected through a conductive connecting piece (5).

4. A kind of high-efficiency charging lithium battery according to claim 1, is characterized in that, the outer side wall of described frame body (1) is provided with a charging port and a discharge port, and each lithium battery in the frame body (1) is provided with a charging port and a discharging port. One of the positive terminal and one negative terminal of the battery unit (2) is electrically connected to the charging port and the discharging port through a conductive connecting plate (6), respectively.

5 . The highly efficient charging lithium battery according to claim 1 , wherein the insulating cover plate ( 3 ) comprises an epoxy resin plate. 6 .

6. A highly efficient charging lithium battery according to claim 1, wherein the lithium battery unit (2) comprises a battery module (7) and a mounting plate (24), a plurality of battery modules (7) ) are stacked side by side, the two mounting plates (24) are placed symmetrically on both sides of the battery module (7), and a plurality of battery modules (7) are clamped and fixed between the two mounting plates (24) .

7. A highly rechargeable lithium battery according to claim 6, wherein the mounting plate (24) is provided with a plurality of mounting holes, and the battery module (7) is provided with positions corresponding to the mounting holes. Corresponding through holes (9), an installation rod (10) passes through the through holes (9) and the installation holes, and the two ends of the installation rod (10) are respectively fixed on the two installation plates (24).

8 . The highly rechargeable lithium battery according to claim 6 , wherein the mounting plate ( 24 ) is provided with a plurality of mounting corner pieces ( 11 ) through which the lithium battery unit ( 2 ) passes. 9 . The component (11) is fixedly arranged in the frame body (1).