CN210576276U

CN210576276U - Lithium ion battery with fool-proof structure

Info

Publication number: CN210576276U
Application number: CN201921774114.6U
Authority: CN
Inventors: 邓海强; 孟亚斌; 王继生
Original assignee: Shenzhen Utility Power Source Co ltd
Current assignee: Shenzhen youteli Energy Co.,Ltd.
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-05-19
Anticipated expiration: 2029-10-21

Abstract

The utility model provides a lithium ion battery with prevent slow-witted structure, including electric core, high-voltage casing upper cover and protection shield. And the middle part of the protection plate is provided with an electrode assembly, the distances between the electrode assembly and the two ends of the protection plate are different, and the electrode assembly is arranged in the middle of the end face of the battery cell. The middle part of high-pressure shell upper cover is equipped with the opening, is equipped with the chamber that holds that is used for cooperating the installation with the tip of electric core in the high-pressure shell upper cover, is equipped with the position of bone in the cavity that holds the chamber, makes to hold the chamber and separates and form the protection plate chamber. The shape of protection plate cavity matches with the protection plate, and the relative open-ended in protection plate cavity both ends has different length. Therefore, when the upper cover of the high-voltage shell is reversely installed, the upper cover of the high-voltage shell cannot be installed, and the fool-proof design is achieved. The lithium ion battery with the fool-proof structure can avoid reworking caused by assembly errors of the upper cover of the lithium ion battery and assembly errors in the anode and cathode directions of the lithium ion battery, avoid the hidden trouble of poor quality caused by the battery, reduce labor and time waste and reduce the manufacturing cost.

Description

Lithium ion battery with fool-proof structure

Technical Field

The utility model relates to a lithium ion battery technical field especially relates to lithium ion battery with prevent slow-witted structure.

Background

With the development of modern science and technology, the productivity level of the human society is continuously improved, and the material culture living level of people is also continuously improved. Under the background, various electronic products are rapidly developed to meet the requirements of spiritual culture, such as various digital electronic products including smart phones, digital cameras, electronic bracelets, DVs, mobile phones for the elderly, and the like, and personalized designs are increasingly available.

The battery is an important part of electronic products and is assembled by a battery core, a protection plate, upper and lower cover rubber shells and a label. In some electronic products, a need arises to provide a lithium ion battery centered on the contact gold finger. In the production process, the protection board and the upper cover are assembled by looking at silk screen printing on the protection board to identify the assembly, and the phenomenon of assembly error in the anode and cathode directions is often easy to occur in production, so that secondary repair is performed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lithium ion battery with prevent slow-witted structure to solve the technical problem of lithium ion battery upper cover assembly error among the prior art.

In order to achieve the above object, an embodiment of the present invention provides a lithium ion battery with foolproof structure, which includes an electrical core, a high voltage shell upper cover and a protection plate.

The middle part of protection shield is equipped with the electrode subassembly of being connected with the electricity core electricity, and the electrode subassembly is different with the distance at protection shield both ends, and electrode subassembly arranges in the terminal surface middle part of electricity core.

The middle part of high-pressure shell upper cover is equipped with the opening that is used for making electrode subassembly expose, is equipped with the chamber that holds that is used for installing with the tip cooperation of electric core in the high-pressure shell upper cover, is equipped with the position of bone in the cavity that holds the chamber, makes to hold the chamber and separates the protection board chamber that forms and be used for holding the protection shield.

Further, the middle of the electrode assembly is spaced apart from the first end of the protection plate by a first distance, and the middle of the electrode assembly is spaced apart from the second end of the protection plate by a second distance.

The distance between the middle part of the opening and the first end of the protection plate cavity is a third distance, the distance between the middle part of the opening and the second end of the protection plate cavity is a fourth distance, the first distance is equal to the third distance, and the second distance is equal to the fourth distance.

Further, the quantity of position of bone is 1, holds the chamber and keeps away from position of bone one side and still is equipped with the profile muscle, and the chamber wall at protection plate chamber both ends is position of bone and profile muscle respectively.

Further, the bone site and/or the profile ribs are provided with ramps for guiding the protection plate into the protection plate cavity.

Further, the electrode assembly comprises a plurality of electrode elements which are sequentially and evenly distributed at intervals along the length direction of the protection plate.

Furthermore, positive and negative marks are arranged near the opening of the upper cover of the high-pressure shell.

Furthermore, a supporting frame used for abutting against and supporting the protection plate is arranged between the protection plate and the battery cell, and one side, facing the protection plate, of the supporting frame is provided with a protrusion used for supporting the protection plate.

Furthermore, the accommodating cavity is also provided with a nickel sheet, and the protective plate is electrically connected with the battery core through the nickel sheet.

Furthermore, the bottom of the battery core is provided with an adhesive tape and a bottom sheet adhered to the battery core through the adhesive tape.

Further, the peripheral wall of the cell is surrounded by a label.

The embodiment of the utility model provides an in, the terminal surface middle part of protection shield installation back electrode subassembly distribution electric core, electrode subassembly is different with the distance at protection shield both ends. The shape of protection plate cavity matches with the protection plate, and the relative open-ended in protection plate cavity both ends has different length. Therefore, when the upper cover of the high-voltage shell is reversely installed, the upper cover of the high-voltage shell cannot be installed, and the fool-proof design is achieved. When the upper cover of the high-voltage shell is positively installed with the end part of the battery core through the accommodating cavity, the protection plate enters the protection plate cavity, and the electrode assembly is exposed out of the opening. The lithium ion battery with the fool-proof structure is simple in structural design, the problem that the assembly error of the upper cover of the lithium ion battery leads to the assembly error of the anode and cathode directions of the lithium ion battery to cause rework is avoided, the hidden danger of poor quality of the battery caused by the assembly error is avoided, the waste of manpower and working hours is reduced, and the manufacturing cost is reduced.

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.

Fig. 1 is a schematic structural diagram of a lithium ion battery with a fool-proof structure according to an embodiment of the present invention;

fig. 2 is a schematic view of the high-pressure casing upper cover and the protection plate according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a partial structure of a lithium ion battery with a fool-proof structure in an embodiment of the present invention.

The reference numbers illustrate:

100. a high-pressure shell upper cover; 200. an electric core; 300. a protection plate; 400. a support frame; 500. a nickel sheet; 600. an adhesive tape; 700. a negative film; 800. labeling;

310. an electrode assembly; 311. an electrode member;

110. an opening; 120. an accommodating chamber; 130. a guard plate cavity; 140. a bone position; 150. a contour rib.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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; can be mechanically or electrically connected; 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.

Referring to fig. 1 to 3, an embodiment of the present invention provides a lithium ion battery with a fool-proof structure, including an electrical core 200, a high-voltage casing upper cover 100 and a protection plate 300. The middle portion of the protection plate 300 is provided with an electrode assembly 310 electrically connected to the battery cell 200, and the electrode assembly 310 is disposed at a different distance from both ends of the protection plate 300, the electrode assembly 310 being disposed at the middle portion of the end surface of the battery cell 200. The middle of the high-pressure casing upper cover 100 is provided with an opening 110 for exposing the electrode assembly 310, the high-pressure casing upper cover 100 is internally provided with a containing cavity 120 for being matched with the end of the battery cell 200, and a bone position 140 is arranged in the cavity of the containing cavity 120, so that the containing cavity 120 is separated to form a protection plate cavity 130 for containing the protection plate 300.

The protection board 300, i.e., a PCB board, has a circuit structure due to design requirements. The protection plate 300 is required to be in place such that the electrode assembly 310 is located at the middle of the end surface of the battery cell 200. The electrode assembly 310 is spaced apart from both ends of the protection plate 300 by different distances, and the protection plate 300 includes a long section and a short section. The high-pressure casing upper cover 100 is provided with a containing cavity 120 therein, and the high-pressure casing upper cover 100 covers and is assembled on the battery cell 200. An opening 110 is also provided in the middle of the high pressure case upper cover 100 and communicates with the receiving chamber 120. The bottom of the accommodating cavity 120 is provided with a bone position 140, and the bone position 140 is separated from the protective plate cavity 130 in the accommodating cavity 120. The shape of the protection plate cavity 130 matches the protection plate 300, or the length, width and height of the protection plate cavity 130 are slightly larger, so that the protection plate 300 can enter the protection plate. Thus, in practice, the shield cavity 130 bounded by the opening 110 may also include lengths that are substantially different in length. In the case where the electrode assembly 310 is aligned with the opening 110, only one mounting direction can be secured in which the protection plate cavity 130 and the protection plate 300 are aligned at a portion having a longer length and a portion having a shorter length. And when installed in the reverse direction, the protection plate 300 cannot enter the protection plate cavity 130. The number of bone sites 140 may be one or more. When there are a plurality of, for example, 2, the end walls at both ends of the guard plate cavity 130 are bone positions 140. The bone 140 may be "1" shaped, or "m" shaped, or may have other shapes, so long as the protection plate 300 can enter the protection plate cavity 130.

In the embodiment of the present invention, the electrode assembly 310 is disposed at the middle of the end surface of the battery cell 200 after the protection plate 300 is mounted, and the distances between the electrode assembly 310 and the protection plate 300 are different. The shape of the protection plate cavity 130 matches the protection plate 300, and both ends of the protection plate cavity 130 have different lengths with respect to the opening 110. Therefore, when the high-voltage case upper cover 100 is reversely installed, the high-voltage case upper cover 100 cannot be installed, thereby achieving the fool-proof design. When the high-pressure case upper cover 100 is mounted to the end of the battery cell 200 through the receiving cavity 120 in the forward direction, the protection plate 300 enters the protection plate cavity 130, and the electrode assembly 310 is exposed from the opening 110. The lithium ion battery with the fool-proof structure is simple in structural design, the problem that the assembly error of the upper cover of the lithium ion battery leads to the assembly error of the anode and cathode directions of the lithium ion battery to cause rework is avoided, the hidden danger of poor quality of the battery caused by the assembly error is avoided, the waste of manpower and working hours is reduced, and the manufacturing cost is reduced.

Preferably, referring to fig. 2, the middle of the electrode assembly 310 is spaced a first distance from the first end of the protection plate 300, and the middle of the electrode assembly 310 is spaced a second distance from the second end of the protection plate 300. The distance between the middle of the opening 110 and the first end of the guard plate cavity 130 is a third distance, the distance between the middle of the opening 110 and the second end of the guard plate cavity 130 is a fourth distance, the first distance is equal to the third distance, and the second distance is equal to the fourth distance.

Since the distances between the electrode assembly 310 and both ends of the protective plate 300 are different, the lengths of the first distance and the second distance are different. The design can ensure that the first end of the protection plate 300 is aligned with the first end of the protection plate cavity 130 and the second end of the protection plate 300 is aligned with the second end of the protection plate cavity 130 during forward installation, and the installation is convenient.

Preferably, referring to fig. 2, the number of the bone sites 140 is 1, and the accommodating cavity 120 is further provided with a contour rib 150 on the side far away from the bone sites 140. At each end of the guard plate cavity 130 are a bone site 140 and a profile rib 150.

The contour ribs 150 in the accommodating cavity 120 are located at two ends of the accommodating cavity 120, and correspond to the fastening positions at two ends of the exterior of the high-pressure shell upper cover 100. The protection plate cavity 130 can be formed by utilizing the profile rib 150 at one end and arranging 1 bone position 140 at the opposite end, the design is simplified, and the fool-proof effect can be ensured.

Preferably, the bone site 140 and/or the profile ribs 150 are provided with ramps for guiding the protective plate 300 into the protective plate cavity 130. The slope may slightly expand the opening of the protection plate cavity 130, facilitating the entry of the protection plate 300, making installation more convenient.

Preferably, referring to fig. 1 and 3, the electrode assembly 310 includes a plurality of electrode members 311, and the plurality of electrode members 311 are sequentially and uniformly distributed along the length direction of the protective plate 300. The design meets the industrial standard and has good universality.

Preferably, referring to fig. 1 and 3, positive and negative signs are provided near the opening 110 of the high-pressure case upper cover 100. The design can quickly identify the anode and the cathode, so that the product is more convenient to use.

Preferably, referring to fig. 1 and 3, a support frame 400 for supporting and supporting the protection plate 300 is disposed between the protection plate 300 and the battery cell 200, and a protrusion for supporting the bottom of the protection plate 300 is disposed at the top of the support frame 400.

Support frame 400 bottom is connected with electric core 200, and the top supports and supports protection shield 300 through protruding, improves protection shield 300's stability, avoids moulding plastics in-process protection shield 300 to be difficult to appear rocking, and protection shield 300 rigidity, product quality is better.

Preferably, referring to fig. 1 and 3, a nickel sheet 500 is further disposed in the accommodating cavity 120, and the protective plate 300 is electrically connected to the battery cell 200 through the nickel sheet 500.

One end of the nickel plate 500 is welded on the battery cell 200, and the other end is bent to bypass the supporting frame 400 and welded on the protection plate 300, so that the protection plate 300 is electrically connected with the battery cell 200.

Preferably, referring to fig. 1 and 3, the bottom of the battery cell 200 is provided with a glue strip 600 and a bottom sheet 700 adhered to the battery cell 200 by the glue strip 600. The adhesive tape 600 can be an AB adhesive tape, and the bottom sheet 700 is adhered and fixed through the adhesive tape 600, so that the installation is convenient.

Preferably, referring to fig. 1, the peripheral wall of the battery cell 200 is surrounded by a label 800. The label 800 may be adhered around the peripheral wall of the battery cell 200. The label 800 may label the battery and manufacturer information on the one hand, and may also protect the battery cell 200 to a certain extent on the other hand.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims

1. A lithium ion battery with a foolproof structure is characterized by comprising a battery core, a high-voltage shell upper cover and a protection plate;

an electrode assembly electrically connected with the battery core is arranged in the middle of the protection plate, distances between the electrode assembly and two ends of the protection plate are different, and the electrode assembly is arranged in the middle of the end face of the battery core;

the middle part of high-pressure shell upper cover is equipped with and is used for making the opening that electrode subassembly exposes, be equipped with in the high-pressure shell upper cover be used for with the chamber that holds of the tip cooperation installation of electric core, be equipped with the position of bone in the cavity in holding the chamber, make it separates to form in the chamber and is used for holding the protection plate chamber of protection shield.

2. The lithium ion battery having a fool-proof structure of claim 1, wherein the middle portion of the electrode assembly is a first distance from the first end of the protection plate, and the middle portion of the electrode assembly is a second distance from the second end of the protection plate;

3. The lithium ion battery with the fool-proof structure as claimed in claim 1, wherein the number of the bone positions is 1, a contour rib is further disposed on one side of the accommodating cavity away from the bone positions, and the bone positions and the contour rib are respectively disposed on the cavity walls at the two ends of the protection plate cavity.

4. The lithium ion battery with foolproof structure of claim 3, wherein said bone site and/or said contoured ribs are provided with ramps for guiding said protective plate into said protective plate cavity.

5. The lithium ion battery having a fool-proof structure of claim 1, wherein the electrode assembly comprises a plurality of electrode elements, and the plurality of electrode elements are sequentially and uniformly distributed along the length direction of the protection plate.

6. The lithium ion battery with a foolproof structure of claim 1, wherein positive and negative signs are provided near the opening of the upper lid of the high-voltage case.

7. The lithium ion battery with the fool-proof structure as claimed in claim 1, wherein a support frame for abutting against and supporting the protection plate is provided between the protection plate and the battery cell, and a protrusion for supporting the protection plate is provided on a side of the support frame facing the protection plate.

8. The lithium ion battery with the fool-proof structure as claimed in claim 1, wherein a nickel plate is further disposed in the accommodating cavity, and the protection plate and the battery core are electrically connected through the nickel plate.

9. The lithium ion battery with a foolproof structure of claim 1, wherein the bottom of said electric core is provided with an adhesive tape and a bottom sheet adhered to said electric core by said adhesive tape.

10. The lithium ion battery with the foolproof structure of any one of claims 1 to 9, wherein a label is surrounded by the peripheral wall of the cell.