CN210350011U

CN210350011U - High-voltage block-shaped lithium battery structure

Info

Publication number: CN210350011U
Application number: CN202020339201.5U
Authority: CN
Inventors: 袁星宇; 李镓睿; 姚淏腾; 吴苑菲; 翟嘉琪; 陈旭; 黄也唯; 吴振军
Original assignee: Hunan Jiarui Technology Co Ltd
Current assignee: Hunan Jiarui Technology Co Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-04-17
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a high-voltage block lithium battery structure, which comprises a shell, a plurality of unit modules arranged in the inner cavity of the shell and an inner supercharging device connected with two adjacent unit modules; the unit module comprises a curved diaphragm, a positive electrode plate and a negative electrode plate which are arranged on two sides of the diaphragm in parallel, and a radiating fin surrounded by the positive electrode plate or the negative electrode plate; the internal supercharging device comprises an insulating plug board, a conducting wire and a conducting elastic sheet, wherein the conducting wire is respectively communicated with the positive electrode sheet and the negative electrode sheet of the two adjacent unit modules through the conducting elastic sheet. The utility model adopts the internal supercharging device to connect the positive electrode plate and the negative electrode plate of two adjacent unit modules, thereby connecting a plurality of unit modules in series and achieving the purpose of series supercharging; the connection number of the unit modules can be selected according to actual voltage requirements, the installation is convenient, the adjustment is flexible, and the range of the application field is expanded.

Description

High-voltage block-shaped lithium battery structure

Technical Field

The utility model relates to the technical field of batteries, specifically a high-pressure cubic lithium cell structure.

Background

A lithium battery is a battery using a nonaqueous electrolyte solution, with lithium metal or a lithium alloy as a negative electrode material. Lithium metal batteries were first proposed and studied by the american engineer Gilbert n.lewis in 1912; in the 70 s of the 20 th century, m.s. whittingham by Exxon corporation proposed and started studying lithium ion batteries. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. With the development of scientific technology, lithium batteries have become the mainstream.

The lithium-sulfur battery is a sustainable high-specific-energy secondary battery, has the advantages of rich element reserves, low cost and the like, and is a research hotspot of the power battery of the electric automobile. Currently, the international technical level of lithium-sulfur batteries is about 350Wh/kg of specific energy.

The massive battery is mostly used to present electric motor car, new forms of energy electric automobile, however current lithium cell, lithium sulphur battery are mostly the slice in the market, and the shape is single, the capacity is little, the discharge voltage is low, can't satisfy the production and life needs, perhaps needs a plurality of slice batteries to establish ties, easily brings radiating problem during complex operation and the volume increase. Therefore, it is necessary to design a high voltage bulk lithium battery.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that will solve, provide a cubic lithium cell structure of high pressure, improve the battery structure for cubic by the slice, the electric motor car of being convenient for, new forms of energy electric automobile's use to realize the large capacity, effect that discharge voltage doubled.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: a high-voltage block-shaped lithium battery structure comprises a shell, a plurality of unit modules and an inner pressurizing device, wherein the unit modules are arranged in an inner cavity of the shell and are sequentially connected with each other;

the unit module comprises a curved diaphragm, a positive electrode piece and a negative electrode piece which are arranged on two sides of the diaphragm in parallel, and a radiating fin surrounded by the positive electrode piece or the negative electrode piece;

interior supercharging device is in including insulating picture peg, setting inside wire of insulating picture peg, set up in be used for fixing in the insulating picture peg recess the electrically conductive shell fragment of positive electrode piece or negative electrode piece, the wire communicates positive electrode piece and the negative electrode piece of two adjacent unit modules through electrically conductive shell fragment respectively.

Furthermore, the longitudinal section of the insulating flashboard is in a shape like a Chinese character 'wang', and the insulating flashboard comprises a first transverse board, a second transverse board, a third transverse board and a vertical board which is connected with the first transverse board, the second transverse board and the third transverse board from top to bottom;

the wire winding is located the riser outside of second diaphragm department, and is a plurality of electrically conductive shell fragment distributes in the recess between first diaphragm and the second diaphragm, between second diaphragm and the third diaphragm.

Further, the positive electrode plate is fixed on the conductive elastic piece of the groove between the first transverse plate and the second transverse plate, and the negative electrode plate is fixed on the conductive elastic piece of the groove between the second transverse plate and the third transverse plate.

In another embodiment, the positive electrode plate is fixed on the conductive elastic sheet of the groove between the second transverse plate and the third transverse plate, and the negative electrode plate is fixed on the conductive elastic sheet of the groove between the first transverse plate and the second transverse plate.

Further, the positive electrode sheet is arranged above the diaphragm, and the negative electrode sheet is arranged below the diaphragm.

In another embodiment, the positive electrode sheet is below the separator and the negative electrode sheet is above the separator.

Furthermore, the positive electrode plate and the negative electrode plate are both flexible electrode plates.

Further, the diaphragm, the positive electrode plate and the negative electrode plate are parallel to each other and are all bent into an S shape.

Furthermore, the inner cavity of the shell is filled with electrolyte, and the inner side wall of the shell is adhered with insulating coating.

Furthermore, the shell is made of glass fiber reinforced polypropylene materials, the conductive elastic sheet is made of metal materials, and the insulating plug board and the diaphragm are made of plastic materials.

Compared with the prior art, the utility model discloses an useful part is:

the utility model adopts the internal supercharging device to connect the positive electrode plate and the negative electrode plate of two adjacent unit modules, thereby connecting a plurality of unit modules in series, which is equivalent to the integration of the internal structure of a plurality of traditional batteries, achieving the purpose of series supercharging and realizing the doubling of the battery voltage; the number of the connected unit modules can be selected according to the actual voltage requirement, the installation is convenient, the adjustment is flexible, and the range of the application field is expanded;

two, the utility model discloses select flexible electrode piece preparation positive electrode piece and negative electrode piece to with the flexible electrode piece bending to S-shaped, both can furthest surround the fin, improve the radiating effect, can satisfy the structural requirement of cubic battery again, solved current lithium cell shape singleness, the problem of small capacity, the normal use of the electric motor car of being convenient for, new energy automobile, thereby satisfy the production life needs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is an internal structural view of a high-voltage bulk lithium battery structure according to the present invention;

FIG. 2 is a schematic longitudinal sectional view of the internal pressurizing device of FIG. 1 connecting two adjacent unit modules;

FIG. 3 is a schematic diagram of the construction of the internal charging apparatus of FIG. 2;

1. a housing; 2. a diaphragm; 3. a positive electrode plate; 4. an electrolyte; 5. a heat sink; 6. an internal pressure boosting device; 7. a conductive spring plate; 8. an insulating plug board; 9. a wire; 11. a negative electrode plate; 12. a first transverse plate; 13. a second transverse plate; 14. a third transverse plate; 15. a riser.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Example one

The high-voltage block lithium battery structure shown in figure 1 is suitable for lithium batteries and lithium-sulfur batteries. The device mainly comprises a shell 1, a plurality of unit modules which are fixedly arranged on a bottom plate or a side wall of the shell 1 and are sequentially connected, an inner pressurizing device 6 for connecting two adjacent unit modules, and electrolyte 4 filled in an inner cavity of the shell 1; an inner supercharging device 6 is adopted to connect two adjacent unit modules, so that a plurality of unit modules are connected in series, which is equivalent to the integration of the internal structure of a plurality of traditional batteries, and the purpose of series supercharging is achieved; the connection number of the unit modules can be selected according to actual voltage requirements, the installation is convenient, the adjustment is flexible, and the range of the application field is expanded.

More specifically, each unit module is divided into a left part and a right part, and the relative positions of the electrode plates on the two sides are the same. The unit module comprises a curved diaphragm 2, a positive electrode sheet 3 and a negative electrode sheet 11 which are arranged on two sides of the diaphragm 2 in parallel, particularly arranged on the inner side wall of the shell 1, and a radiating fin 5 surrounded by the positive electrode sheet 3 or the negative electrode sheet 11; the positive electrode plate 3 and the negative electrode plate 11 are both flexible electrode plates, the diaphragm 2, the positive electrode plate 3 and the negative electrode plate 11 are parallel to each other and are bent into an S shape, so that radiating fins can be surrounded to the maximum extent, the radiating effect is improved, the structural requirement of the block-shaped battery can be met, the problems of single shape and small capacity of the existing lithium battery are solved, the normal use of an electric vehicle and a new energy vehicle is facilitated, and the production and living needs are met.

More specifically, as shown in fig. 2, the inner pressurizing device 6 is located above or below the heat sink 5, and includes an insulating board 8, a conducting wire 9 disposed inside the insulating board 8, and a conductive elastic sheet 7 disposed in a groove of the insulating board 8 for fixing the electrode sheet 3 or the negative electrode sheet 11, and the diaphragm 2 is not inserted into the inner pressurizing device. The lead 9 is respectively communicated with the positive electrode plate 3 and the negative electrode plate 11 of two adjacent unit modules through the conductive elastic sheet 7, which is equivalent to the conventional sequential connection of the positive electrode and the negative electrode of a plurality of batteries, and if the internal pressurizing device 6 is not arranged, the direct connection can cause the short circuit of the batteries; the conductive elastic sheet is made of a metal material, preferably copper, so as to achieve good conductive performance, and the insulating plug board is made of a plastic material so as to achieve insulation.

More specifically, as shown in fig. 3, the longitudinal section of the insulating insertion plate 8 is "king" shaped, and includes a first transverse plate 12, a second transverse plate 13, and a third transverse plate 14, which are sequentially arranged from top to bottom, and a vertical plate 15 connecting the first transverse plate 12, the second transverse plate 13, and the third transverse plate 14; one wire 9 twines and is located the riser 15 outside of second diaphragm 13 department, electrically conductive shell fragment 7 distributes in two recesses between first diaphragm 12 and the second diaphragm 13, in two recesses between second diaphragm 13 and the third diaphragm 14, and four recesses that form are parallel to each other and do not communicate each other.

In this embodiment, the positive electrode tab 3 is welded and fixed to the conductive elastic tab 7 in the groove between the first horizontal plate 12 and the second horizontal plate 13, and the negative electrode tab 11 is welded and fixed to the conductive elastic tab 7 in the groove between the second horizontal plate 13 and the third horizontal plate 14.

The utility model discloses a further embodiment, positive electrode piece 3 welded fastening in on the electrically conductive shell fragment 7 in the recess between second diaphragm 13 and the third diaphragm 14, negative electrode piece 11 welded fastening in on the electrically conductive shell fragment 7 in the recess between first diaphragm 12 and the second diaphragm 13, electrically conductive shell fragment 7 makes the shape that matches with each recess to can fix the electrode piece better for the standard, and electrically conductive shell fragment 7 has elasticity, can utilize self elastic reaction force chucking in each recess.

In the present embodiment, the positive electrode sheet 3 is above the separator 2, and the negative electrode sheet 11 is below the separator 2.

In another embodiment of the present invention, the positive electrode plate 3 is below the diaphragm 2, and the negative electrode plate 11 is above the diaphragm 2.

Preferably, the shell 1 is made of glass fiber reinforced polypropylene materials, and has excellent performances of flame retardance, low temperature resistance and no brittle fracture; the insulating coating is adhered to the inner side wall of the shell 1 for coating, so that the effects of effectively preventing electric leakage and improving safety performance are achieved.

The utility model discloses a concrete use is:

during assembly, the diaphragm 2, the positive electrode plate 3 and the negative electrode plate 11 are bent into an S shape at the same time, and the radiating fins 5 are arranged in the bent space of the positive electrode plate 3 or the negative electrode plate 11, so that the surrounding in three directions is realized, and the radiating effect is improved; then, connecting two adjacent unit modules through an inner supercharging device 6, specifically fixing conductive elastic sheets 7 between a first transverse plate 12 and a second transverse plate 13 of an insulating flashboard 8 and in grooves between the second transverse plate 13 and a third transverse plate 14 respectively, and symmetrically and electrically connecting one ends of two positive electrode sheets 3 to the conductive elastic sheets 7 between the first transverse plate 12 and the second transverse plate 13 respectively through electric welding, symmetrically and electrically connecting one ends of two negative electrode sheets 11 to the conductive elastic sheets 7 between the second transverse plate 13 and the third transverse plate 14 through electric welding, connecting one end of a lead 9 to the conductive elastic sheets 7 between the first transverse plate 12 and the second transverse plate 13, and connecting the other end of the lead to the conductive elastic sheets 7 between the second transverse plate 13 and the third transverse plate 14, thereby completing the series connection of the two adjacent unit modules; the overall structure after will establishing ties is fixed in the shell 1, to the appearance intracavity of shell 1 pour into appropriate amount electrolyte 4, seals up at last, accomplishes so far the utility model discloses an equipment. The specific application method is the same as that of the traditional lithium battery, and is not described herein.

Example two

Another high-voltage block-shaped lithium battery structure shown in fig. 1-3 mainly comprises a housing 1, a plurality of unit modules which are arranged in the inner cavity of the housing 1 and are sequentially connected, an internal pressurizing device 6 which is connected with two adjacent unit modules, and an electrolyte 4 filled in the inner cavity of the housing 1.

The difference from the first embodiment is that the diaphragm 2, the positive electrode sheet 3 and the negative electrode sheet 11 are bent into other curved shapes at the same time, so as to surround the heat sink to the maximum extent.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A high-voltage block lithium battery structure comprises a shell (1), and is characterized in that: the device also comprises a plurality of unit modules which are arranged in the inner cavity of the shell (1) and are sequentially connected and an inner supercharging device (6) which is connected with two adjacent unit modules;

the unit module comprises a curved diaphragm (2), a positive electrode sheet (3) and a negative electrode sheet (11) which are arranged on two sides of the diaphragm (2) in parallel, and a radiating fin (5) surrounded by the positive electrode sheet (3) or the negative electrode sheet (11);

interior supercharging device (6) are in including insulating picture peg (8), setting wire (9) inside insulating picture peg (8), set up in be used for fixing in insulating picture peg (8) recess the electrically conductive shell fragment (7) of positive electrode piece (3) or negative electrode piece (11), wire (9) are respectively through electrically conductive shell fragment (7) positive electrode piece (3) and negative electrode piece (11) of two adjacent unit modules of intercommunication.

2. A high voltage bulk lithium battery structure as claimed in claim 1, wherein: the longitudinal section of the insulating insertion plate (8) is in a king shape and comprises a first transverse plate (12), a second transverse plate (13) and a third transverse plate (14) which are sequentially arranged from top to bottom and a vertical plate (15) which is sequentially connected with the first transverse plate (12), the second transverse plate (13) and the third transverse plate (14);

the wire (9) twines and is located riser (15) outside second diaphragm (13) department, and is a plurality of electrically conductive shell fragment (7) distribute in the recess between first diaphragm (12) and second diaphragm (13), between second diaphragm (13) and third diaphragm (14).

3. A high voltage bulk lithium battery structure as claimed in claim 2, wherein: the positive electrode plate (3) is fixed on the conductive elastic sheet (7) of the groove between the first transverse plate (12) and the second transverse plate (13), and the negative electrode plate (11) is fixed on the conductive elastic sheet (7) of the groove between the second transverse plate (13) and the third transverse plate (14).

4. A high voltage bulk lithium battery structure as claimed in claim 2, wherein: the positive electrode plate (3) is fixed on the conductive elastic sheet (7) of the groove between the second transverse plate (13) and the third transverse plate (14), and the negative electrode plate (11) is fixed on the conductive elastic sheet (7) of the groove between the first transverse plate (12) and the second transverse plate (13).

5. A high voltage bulk lithium battery structure as claimed in claim 2, wherein: the positive electrode sheet (3) is arranged above the diaphragm (2), and the negative electrode sheet (11) is arranged below the diaphragm (2).

6. A high voltage bulk lithium battery structure as claimed in claim 2, wherein: the positive electrode sheet (3) is arranged below the diaphragm (2), and the negative electrode sheet (11) is arranged above the diaphragm (2).

7. A high voltage bulk lithium battery structure as claimed in any one of claims 1 to 6, wherein: the positive electrode plate (3) and the negative electrode plate (11) are both flexible electrode plates.

8. A high voltage bulk lithium battery structure as claimed in claim 7, wherein: the diaphragm (2), the positive electrode plate (3) and the negative electrode plate (11) are parallel to each other and are all bent into an S shape.

9. A high voltage bulk lithium battery structure as claimed in claim 8, wherein: the inner cavity of the shell (1) is filled with electrolyte (4), and the inner side wall is adhered with insulating coating for coating.

10. A high voltage bulk lithium battery structure as claimed in claim 9, wherein: the shell (1) is made of glass fiber reinforced polypropylene materials, the conductive elastic sheet (7) is made of metal materials, and the insulating inserting plate (8) and the diaphragm (2) are made of plastic materials.