CN217562763U

CN217562763U - Lithium ion battery

Info

Publication number: CN217562763U
Application number: CN202123430737.1U
Authority: CN
Inventors: 庄文生; 温尚龙; 陈欣义
Original assignee: Guangzhou Guangzhu Battery Co ltd
Current assignee: Guangzhou Guangzhu Battery Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-10-11
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a lithium ion battery, include: the inner surface and the outer surface of the metal shell are both provided with an insulating protective layer; and the power supply module is arranged in the metal shell. Compared with a traditional plastic shell, the metal shell has higher strength, is not easy to damage and deform when being extruded by a heavy object, can provide effective protection for the power supply module, is favorable for reducing the potential safety hazard when the lithium ion battery is extruded by the heavy object, and the inner surface and the outer surface of the metal shell are both provided with insulating protective layers, so that the metal shell not only has higher strength, but also has better insulativity.

Description

Lithium ion battery

Technical Field

The utility model relates to the technical field of batteries, in particular to lithium ion battery.

Background

Among the prior art, lithium ion battery's casing is plastic housing usually, and plastic housing has better insulating nature, but intensity is relatively poor, takes place damage and deformation easily when receiving the heavy object extrusion, can't provide effectual protection for the structure that lithium ion battery is located the casing inside, and lithium ion battery is located the structure of casing inside and has the risk of explosion when receiving the extrusion, consequently, lithium ion battery adopts plastic housing to have certain potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a lithium ion battery, its casing has better insulating nature and has higher intensity, is favorable to reducing the potential safety hazard when receiving the heavy object extrusion.

According to the utility model discloses lithium ion battery, include: the inner surface and the outer surface of the metal shell are both provided with an insulating protective layer; and the power supply module is arranged in the metal shell.

According to the utility model discloses lithium ion battery has following beneficial effect at least: compared with a traditional plastic shell, the metal shell has higher strength, is not easy to damage and deform when being extruded by a heavy object, can provide effective protection for the power supply module, is favorable for reducing the potential safety hazard when the lithium ion battery is extruded by the heavy object, and the inner surface and the outer surface of the metal shell are both provided with insulating protective layers, so that the metal shell not only has higher strength, but also has better insulativity.

According to some embodiments of the invention, the insulating protection layer is a plastic layer.

According to some embodiments of the invention, the metal housing is made of stainless steel.

According to some embodiments of the utility model, be provided with in the metal casing with power module electric connection's BMS circuit board.

According to some embodiments of the utility model, the BMS circuit board is fixed set up in power module is last, the BMS circuit board with the epoxy board has been put to the clamp between the power module.

According to some embodiments of the invention, the metal shell is provided with an air vent.

According to some embodiments of the present invention, the metal shell is provided with a handle.

According to some embodiments of the invention, the handle is detachably arranged on the metal shell through a screw.

According to some embodiments of the utility model, be provided with on the metal casing and be used for the location arch with outside location structure cooperation location.

According to some embodiments of the utility model, the power module includes first module and second module, first module includes first support and 63 battery cells, 63 battery cells adopt the mode of 9 and 7 strings set up in on the first support, the second module with first module sets up side by side, the second module includes second support and 54 battery cells, 54 battery cells adopt the mode of 9 and 6 strings set up in on the second support, the positive terminal of first module with the negative pole end of second module passes through the nickel strap and connects to form the group battery of 9 and 13 strings.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of an overall structure of a lithium ion battery according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is an enlarged view of a portion of FIG. 1 at C;

fig. 5 is a schematic diagram of a partial structure of a lithium ion battery according to an embodiment of the present invention.

Reference numerals:

the battery cell a, the case 100, the vent hole 110, the handle 120, the positioning protrusion 130, the 3P socket 140, the 6P socket 150, the BMS circuit board 200, the first module 300, the first bracket 310, the second module 400, and the second bracket 410.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the orientation or positional relationship indicated by upper, lower, front, rear, left, right, etc. is the orientation or positional relationship shown on the drawings, it is only for convenience of description and simplification of the description, and it is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, if there are several, greater than, less than, exceeding, above, below, within, etc., the terms, wherein several means are one or more, and several means are two or more, and greater than, less than, exceeding, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

In the description of the present invention, if the first and second terms appear, they are only used for distinguishing technical features, but they are not interpreted to indicate or imply relative importance or to implicitly indicate the number of the indicated technical features or to implicitly indicate the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, a lithium ion battery according to an embodiment of the present invention includes a metal case 100 and a power supply module.

The inner surface and the outer surface of the metal shell 100 are both provided with an insulating protective layer, and the power supply module is arranged in the metal shell 100.

Compared with the traditional plastic shell, the metal shell 100 has higher strength, is not easy to damage and deform when being extruded by a heavy object, can provide effective protection for a power supply module, is beneficial to reducing the potential safety hazard when the lithium ion battery is extruded by the heavy object, and the inner surface and the outer surface of the metal shell 100 are both provided with insulating protective layers, so that the metal shell 100 not only has higher strength, but also has better insulating property.

It should be noted that, in some embodiments, the insulating protection layer is a plastic layer, but of course, the insulating protection layer may also be a rubber layer, which is not limited herein.

It should be noted that in some of the embodiments, the metal housing 100 is made of stainless steel, and has high strength and corrosion resistance.

It should be noted that, in some embodiments, the BMS circuit board 200 electrically connected to the power supply module is disposed in the metal housing 100, so that the power supply module can be intelligently managed and maintained, thereby preventing the power supply module from being overcharged, overdischarged, and overcurrent, which is beneficial to prolonging the service life of the power supply module, and at the same time, parameters of the power supply module, such as current, voltage, capacity, charge/discharge frequency, and charge depth, can be interactively communicated with the electric device through a specific protocol.

Referring to fig. 5, in some embodiments, the BMS circuit board 200 is fixedly disposed on the power supply module, and particularly, the BMS circuit board 200 is wrapped on the power supply module by a fiber tape, and an epoxy plate is interposed between the BMS circuit board 200 and the power supply module to physically and insulatedly isolate the BMS circuit board 200 from the power supply module, wherein the power supply module and the BMS circuit board 200 are covered with the epoxy plate for insulation and protection.

Referring to fig. 1 and 2, in some embodiments, the metal housing 100 is provided with a plurality of vent holes 110 to facilitate pressure relief, specifically, the number of the vent holes 110 is multiple, and the plurality of vent holes 110 are distributed in a rectangular array, but the vent holes 110 may also be distributed in other manners, which is not limited herein.

Referring to fig. 1, in some embodiments, a handle 120 is provided on the metal shell 100 to facilitate manual handling.

It should be noted that in some embodiments, the handle 120 is detachably disposed on the metal casing 100 by screws, so as to facilitate production and assembly.

Referring to fig. 1 and 3, in some embodiments, a positioning protrusion 130 for positioning in cooperation with an external positioning structure is disposed on the metal casing 100, and the lithium ion battery may be positioned and mounted in cooperation with the external positioning groove structure or the positioning hole structure, specifically, the positioning protrusion 130 is a screw detachably mounted on the metal casing 100, and of course, the positioning protrusion may also be a protrusion integrally formed on the metal casing, which is not limited herein.

Referring to fig. 5, in some embodiments, the power supply module includes a first module 300 and a second module 400, the first module 300 includes a first support 310 and 63 single batteries a, the 63 single batteries a are arranged on the first support 310 in 9-7 strings, the second module 400 is arranged side by side with the first module 300, the second module 400 includes a second support 410 and 54 single batteries a, the 54 single batteries a are arranged on the second support 410 in 9-6 strings, and a positive terminal of the first module 300 is connected with a negative terminal of the second module 400 through a nickel strap to form a battery pack with 9-13 strings, wherein the single batteries a are 18650 type ternary lithium ion batteries.

Referring to fig. 1 and 4, in some embodiments, the metal case 100 is provided with 3P and

6P sockets

140 and 150, the 3P socket 140 as a charging port, the 6P socket 150 as an integrated discharging port, and a BMS circuit board 200 as a port for communication with electric devices.

In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", and "some examples", etc., it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lithium ion battery, comprising:

the metal shell (100), the inner surface and the outer surface of the metal shell (100) are provided with insulating protective layers;

a power supply module disposed within the metal housing (100).

2. The lithium ion battery of claim 1, wherein the insulating protective layer is a plastic layer.

3. The lithium ion battery of claim 1, wherein the metal casing (100) is made of stainless steel.

4. The lithium ion battery according to claim 1, wherein a BMS circuit board (200) electrically connected to the power supply module is provided inside the metal case (100).

5. The lithium ion battery of claim 4, wherein the BMS circuit board (200) is fixedly disposed on the power supply module, and an epoxy board is interposed between the BMS circuit board (200) and the power supply module.

6. The lithium ion battery according to claim 1, wherein the metal case (100) is provided with a vent hole (110).

7. The lithium ion battery according to claim 1, wherein a handle (120) is provided on the metal case (100).

8. The lithium ion battery of claim 7, wherein the handle (120) is detachably disposed on the metal case (100) by a screw.

9. The lithium ion battery of claim 1, wherein the metal casing (100) is provided with a positioning protrusion (130) for positioning in cooperation with an external positioning structure.

10. The lithium ion battery according to claim 1, wherein the power supply module comprises a first module (300) and a second module (400), the first module (300) comprises a first support (310) and 63 single batteries (a), the 63 single batteries (a) are arranged on the first support (310) in a 9-to-7 string manner, the second module (400) is arranged side by side with the first module (300), the second module (400) comprises a second support (410) and 54 single batteries (a), the 54 single batteries (a) are arranged on the second support (410) in a 9-to-6 string manner, and a positive terminal of the first module (300) and a negative terminal of the second module (400) are connected through a nickel strap to form a 9-to-13 string battery pack.