CN207265180U - All-solid-state lithium battery with improved stability - Google Patents

Abstract

The utility model discloses an all-solid-state lithium battery with improved stability, which comprises a shell, a lithium polymer battery cell, a battery circuit board and a FPC (flexible printed circuit) line; the lithium polymer battery cell and the battery circuit board are respectively arranged in the shell; the lithium polymer battery cell comprises a positive plate, a negative plate, a positive active material layer coated on the positive plate, a negative active material layer coated on the negative plate and an electrolyte membrane arranged between the positive plate and the negative plate; the negative electrode active material layer is a lithium metal material layer, and the positive electrode active material layer is a lithium iron phosphate material layer; a packaging film is covered outside the lithium polymer battery cell; the battery circuit board is respectively connected with the lithium polymer battery cell and the FPC wire, the top side of the outer end part of the FPC wire is provided with a connector interface, and the bottom side of the outer end part of the FPC wire is provided with a reinforcing sheet in a sticking mode corresponding to the position where the connector interface is located. Therefore, the conductive adhesive has the advantages of good conductivity, good stability, convenience in connection application and the like.

Description

All-solid-state lithium battery with improved stability

technical field

The utility model relates to the technology in the field of lithium batteries, in particular to an all-solid lithium battery with improved stability.

Background technique

In recent years, the rapid development of portable consumer electronic products such as smartphones, tablet computers, and mobile power supplies has driven the rapid growth of lithium battery products. At present, most lithium batteries have potential safety hazards due to the use of flammable and explosive organic electrolytes. In addition, because the electrolytes are liquid, the processing performance of this type of lithium batteries is limited. Using solid electrolytes as electrolytes for lithium batteries can be effective. To solve the above problems, therefore, the research on all-solid-state lithium batteries has become one of the current research hotspots of lithium batteries. In this patent application, the applicant has carefully studied a new technical solution, which effectively improves the performance of all-solid-state lithium batteries. The stability improves the product quality.

Utility model content

In view of this, the utility model aims at the deficiencies in the prior art, and its main purpose is to provide an all-solid-state lithium battery with improved stability, which has the advantages of good conductivity, good stability, and convenient connection and application.

In order to achieve the above object, the utility model adopts the following technical solutions:

An all-solid-state lithium battery with improved stability includes a casing, a lithium polymer cell, a battery circuit board and an FPC wire, wherein the lithium polymer cell and the battery circuit board are respectively arranged in the casing; the lithium polymer cell and the battery circuit board are respectively arranged in the casing; The polymer cell includes a positive electrode sheet, a negative electrode sheet, a positive electrode active material layer coated on the positive electrode sheet, a negative electrode active material layer coated on the negative electrode sheet, and an electrolyte membrane arranged between the positive electrode sheet and the negative electrode sheet; The negative electrode active material layer is a lithium metal material layer, the positive electrode active material layer is a lithium iron phosphate material layer; the lithium polymer cell is covered with an encapsulation film; the battery circuit board is connected to the lithium polymer battery respectively. The battery cell, the FPC line, and the top side of the outer end of the FPC line are provided with a connector interface, and the bottom side of the outer end of the FPC line is provided with a reinforcing sheet corresponding to the position of the connector interface.

As a preferred solution, the battery circuit board is arranged on the front side of the lithium polymer battery cell; the casing includes a shell body and a front end cover, and the shell body has a bottom plate part, which is connected to the left and right side edges of the bottom plate part. Two side plate parts, respectively bent from the top of the side plate part and extend horizontally; the lithium polymer cell is located in the main body of the shell, the main body of the shell has a front end opening, and the front end cover is sealed on the front end opening , the battery circuit board is correspondingly located in the front cover, and the aforementioned FPC wires protrude from the front cover.

As a preferred solution, the top surface of the lithium polymer battery is provided with a silk screen area, and the top surface of the front cover is provided with a barcode.

As a preferred solution, the reinforcing sheet is a steel sheet.

As a preferred solution, the battery circuit board is provided with a temperature thermistor, and the connector interface has an electrode positive terminal, an electrode negative terminal, an NTC terminal, and a detection terminal grounding terminal; the connector interface is a board-to-board Connector socket, the board-to-board connector socket has an insulating seat, the aforementioned electrode positive terminal, electrode negative terminal, NTC terminal, and detection terminal grounding terminal are respectively arranged in the insulating seat, the insulating seat has a plug interface, the electrode positive terminal, electrode The negative terminal, the NTC terminal, and the detection terminal grounding terminal all have a contact end and a welding end protruding from the outside of the insulating seat. The contact end is exposed in the socket, and the welding ends are respectively connected to the FPC line; Isolation protrusions are arranged between adjacent contact ends.

As a preferred solution, the front-end cover has a front-end plate and a lateral flange connected to the periphery of the front-end plate, a positioning column is protruded from the rear end surface of the front-end plate, and a positioning hole is opened on the aforementioned battery circuit board, and the positioning column Extend into the corresponding positioning hole to form a positioning, and the front plate is also provided with a relief port for the connection of the FPC line, and the FPC line protrudes from the relief port.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above-mentioned technical scheme that it mainly makes The all-solid-state lithium battery of the utility model has many advantages such as good conductivity, good stability, and convenient connection and application, and is suitable for popularization and application; and, its overall product has a long service life, and has a good application in electronic products. reliability.

In order to more clearly illustrate the structural features, technical means and the specific purpose and functions achieved by the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the top view of the embodiment of the utility model;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Fig. 3 is the bottom view of the embodiment of the utility model.

Explanation of the accompanying drawings:

10. FPC line 11. Reinforcing sheet

21. Shell main body 22. Front end cover

201. Silkscreen area 202. Barcode

31. Electrode positive terminal 32. Electrode negative terminal

33. NTC terminal 34. Detection terminal grounding terminal

40. Insulation seat 41. Plug interface

42. Isolation convex part 50. Connector interface.

Detailed ways

Please refer to Fig. 1 to Fig. 3, which shows the concrete structure of the embodiment of the present invention, described all-solid-state lithium battery, comprises shell, lithium polymer cell, battery circuit board and FPC line 10, wherein , the lithium polymer battery cell and the battery circuit board are respectively arranged in the casing.

The lithium polymer cell includes a positive electrode sheet, a negative electrode sheet, a positive electrode active material layer coated on the positive electrode sheet, a negative electrode active material layer coated on the negative electrode sheet, and an electrolyte disposed between the positive electrode sheet and the negative electrode sheet film; the negative electrode active material layer is a lithium metal material layer, and the positive electrode active material layer is a lithium iron phosphate material layer; the outside of the lithium polymer cell is covered with an encapsulation film; the battery circuit boards are respectively connected to The lithium polymer battery cell, the FPC wire 10, the top side of the outer end of the FPC wire 10 is provided with a connector interface 50, the bottom side of the outer end of the FPC wire 10 corresponds to the position of the connector interface 50, and a reinforcing sheet 11 is attached, Preferably, the reinforcing sheet 11 is a steel sheet.

The battery circuit board is arranged on the front side of the lithium polymer cell; the shell includes a shell body 21 and a front cover 22, and the shell body 21 has a bottom plate and two sides connected to the left and right side edges of the bottom plate. The plate portion, the flange portion that is bent and extended horizontally from the top of the side plate portion respectively; the lithium polymer cell is located in the shell main body 21, the shell main body 21 has a front end opening, and the front end cover 22 is sealed in the front end opening , the battery circuit board is correspondingly located in the front cover 22 , and the aforementioned FPC wire 10 protrudes from the front cover 22 . Here, the front-end cover 22 has a front-end plate and a lateral flange connected to the periphery of the front-end plate. The rear end surface of the front-end plate is protruded with a positioning column, and the aforementioned battery circuit board is provided with a positioning hole, and the positioning column extends into it. Positioning is formed in the corresponding positioning holes, and a relief port for connecting the FPC line 10 is provided on the front plate, and the FPC line 10 protrudes from the relief port.

As shown in FIG. 1 , a silk screen area 201 is provided on the top surface of the lithium polymer cell, and a barcode 202 is provided on the top surface of the front end cover 22 .

The battery circuit board is provided with a temperature thermistor, and the setting of the temperature thermistor is beneficial to ensure that the charging and discharging current is basically stable within a more suitable range. The connector interface 50 has an electrode positive terminal 31, an electrode negative terminal 32, an NTC terminal 33, and a detection terminal ground terminal 34; the connector interface 50 is a board-to-board connector socket, and the board-to-board connector socket has The insulating seat 40, the aforementioned electrode positive terminal 31, the electrode negative terminal 32, the NTC terminal 33, and the detection terminal grounding terminal 34 are respectively arranged in the insulating seat 40. The insulating seat 40 has an insertion port 41, the electrode positive terminal 31, the electrode negative terminal 32, The NTC terminal 33 and the detection terminal grounding terminal 34 all have a contact end and a welding end extending outside the insulating seat 40, the contact end is exposed in the socket 41, and the welding ends are respectively connected to the FPC line 10; the insulating seat 40 An isolation protrusion 42 is provided between corresponding adjacent contact ends.

In summary, the key point of the design of the utility model is that the all-solid-state lithium battery of the utility model has a good conductivity and a stable Good performance, convenient connection and application, etc., are suitable for popularization and application; and its overall product life is long, and it has good reliability when applied to electronic products.

The above are only preferred embodiments of the present utility model, and do not limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model , all still belong to the scope of the technical solution of the utility model.

Claims (6)

1. An all-solid-state lithium battery that improves stability, is characterized in that: comprises housing, lithium polymer cell, battery circuit board and FPC line, wherein, described lithium polymer cell, battery circuit board are arranged on respectively In the casing; the lithium polymer cell includes a positive electrode sheet, a negative electrode sheet, a positive electrode active material layer coated on the positive electrode sheet, a negative electrode active material layer coated on the negative electrode sheet, and, arranged between the positive electrode sheet and the negative electrode sheet The electrolyte film between; the negative electrode active material layer is a lithium metal material layer, the positive electrode active material layer is a lithium iron phosphate material layer; the outside of the lithium polymer cell is covered with a packaging film; the battery circuit board They are respectively connected to the lithium polymer battery cell and the FPC line. The top side of the outer end of the FPC line is provided with a connector interface, and the bottom side of the outer end of the FPC line is attached with a reinforcing sheet corresponding to the position of the connector interface. 2. The all-solid-state lithium battery with improved stability according to claim 1, characterized in that: the battery circuit board is arranged on the front side of the lithium polymer battery cell; the shell includes a shell main body and a front end cover, The shell body has a bottom plate, two side plates connected to the left and right side edges of the bottom plate, and flanges that are respectively bent from the top of the side plates and extend horizontally; the lithium polymer battery is located in the shell body, The case body has a front end opening, the front end cover is sealed at the front end opening, the battery circuit board is correspondingly located in the front end cover, and the aforementioned FPC wires protrude from the front end cover. 3. The all-solid-state lithium battery with improved stability according to claim 2, characterized in that: the top surface of the lithium polymer cell is provided with a silk screen area, and the top surface of the front end cover is provided with a barcode. 4. The all-solid-state lithium battery with improved stability according to claim 1, characterized in that: the reinforcing sheet is a steel sheet. 5. The all-solid-state lithium battery with improved stability according to claim 1, characterized in that: the battery circuit board is provided with a temperature thermistor, and the connector interface has an electrode positive terminal, an electrode negative terminal, an NTC terminals, detection end grounding terminals; the connector interface is a board-to-board connector socket, the board-to-board connector socket has an insulating seat, and the aforementioned electrode positive terminal, electrode negative terminal, NTC terminal, and detection end grounding terminal are respectively set In the insulating seat, the insulating seat has a plug-in interface, and the electrode positive terminal, the electrode negative terminal, the NTC terminal, and the detection terminal grounding terminal all have a contact end and a welding end extending outside the insulating seat, and the contact end is exposed in the plug-in port. The welding ends are respectively connected to the FPC wires; isolation protrusions are arranged between corresponding adjacent contact ends on the insulating seat. 6. The all-solid-state lithium battery with improved stability according to claim 2, characterized in that: the front end cover has a front end plate and a lateral flange connected to the periphery of the front end plate, and the rear end surface of the front end plate is convexly arranged There are positioning posts, the aforementioned battery circuit boards are provided with positioning holes, and the positioning posts extend into the corresponding positioning holes to form positioning, and the front end plate is also provided with a relief port for connecting the FPC lines, and the FPC lines are self-exiting. Mouth sticks out.