CN218483001U - Battery protection board and battery with same - Google Patents

Abstract

The utility model relates to a battery technology field, concretely relates to battery protection shield and have its battery. A battery protection plate comprising: the main part, be equipped with the flexible circuit board of two-layer range upon range of setting in the main part, every layer the flexible circuit board is two-layer including copper layer and the insulating layer of range upon range of setting the laminating of insulating layer sets up, and is two-layer the copper layer is established two-layerly the outside of insulating layer, and the symmetry sets up. The copper skin layer in the flexible circuit board is arranged in parallel, so that the internal resistance of the battery protection board can be reduced, the joule heat generated by the current passing through the battery protection board is further reduced, and the effect of reducing the temperature rise is achieved.

Description

Battery protection board and battery with same

Technical Field

The utility model relates to a battery technology field, concretely relates to battery protection shield and have its battery.

Background

The lithium metal battery has the advantages of high storage energy density, long service life, light dead weight, environmental protection and the like, and is generally applied to portable electrical appliances such as portable computers, video cameras and mobile communication. In general, a lithium metal battery uses manganese dioxide as a positive electrode material, lithium metal or an alloy metal thereof as a negative electrode material, and a nonaqueous electrolyte solution. The finished lithium battery mainly comprises two parts, namely a lithium battery core and a protective plate, wherein the lithium battery core mainly comprises a positive plate, a diaphragm, a negative plate and electrolyte; the lithium battery protection board is used for protecting the lithium battery, and the lithium battery protection board is used for protecting the battery from over-discharge, over-charge and over-current and protecting the output short circuit.

In order to meet the requirements of meeting the requirements of increasing battery capacity and increasing battery charging efficiency in the current battery market, the size of the battery protection plate is smaller and smaller under the condition of limitation of the size of a portable electrical appliance and the appearance of an electric core, the battery protection plate needs to pass through larger current on the small and narrow battery protection plate, the temperature rise can be higher, the service life of the battery is influenced, and faults are easily caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the higher defect of battery protection shield temperature rise among the prior art to a battery that reduces temperature rise, increase of service life's battery protection shield and have it is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a battery protection plate comprising:

the main part, be equipped with the flexible circuit board of two-layer range upon range of setting in the main part, every layer the flexible circuit board is including the copper layer and the insulating layer of range upon range of setting, two-layer the flexible board two-layer the insulating layer laminating sets up, two-layer the copper layer is divided and is established two-layerly the outside of insulating layer, and the symmetry sets up.

Preferably, the copper sheet layer includes the first copper sheet layer and the second copper sheet layer that set up side by side, and the first copper sheet layer and the second copper sheet layer of two-layer flexible circuit board correspond the setting respectively, first copper sheet layer is used for connecting the anodal utmost point ear of battery, and the second copper sheet layer is used for connecting battery negative pole utmost point ear.

Preferably, a plurality of through holes penetrating along the thickness direction are formed in the two layers of flexible circuit boards, and copper is plated in the parts, located in the insulating layers, of the through holes so as to conduct the two layers of copper skin layers.

Preferably, the ink protection layer is arranged on the side, far away from the insulating layer, of the copper skin layer.

Preferably, a plurality of windows distributed in an array are arranged in the ink protection layer positioned on the outer layer.

Preferably, the copper layer at the first end of the main body is connected with the circuit board.

Preferably, the circuit board is any one of two layers of stacked PCB boards, two layers of stacked flexible circuit boards or one layer of stacked PCB board and one layer of flexible circuit board.

Preferably, a connector is arranged on the copper layer at the second end of the main body.

Preferably, at least two layers of flexible circuit boards are connected by reflow soldering or thermocompression soldering.

A battery comprises the battery protection plate.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a battery protection shield sets up two-layer flexible circuit board through range upon range of to make the copper skin layer among the flexible circuit board establish in the outside of two-layer insulating layer, and the symmetry sets up, can be so that battery protection shield internal resistance reduces, and then the joule heat that the reduction current produced through the battery protection shield plays the effect that reduces the temperature rise.

2. The utility model provides a battery protection shield through on two-layer flexible circuit board, runs through along its thickness direction and sets up a plurality of through-hole, and the through-hole is located the part in the insulating layer and plates with copper for two-layer copper sheet layer switches on, and the increase area that switches on, thereby increases battery protection shield through-flow capacity.

3. The utility model provides a battery protection shield sets up the connector on the copper sheet layer of the second end of main part, through the two-layer flexible circuit board in the main part, can reduce the temperature rise of the connector to the position of buckling on the protection shield.

Drawings

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

Fig. 1 is a schematic view of a battery protection plate provided by the present invention;

FIG. 2 is an exploded view at A-A of FIG. 1;

reference numerals are as follows: 1. a main body; 2. a first end of the body; 3. a second end of the body; 4. an ink protective layer; 5. a copper skin layer; 6. an insulating layer; 7. windowing; 8. a first copper layer; 9. a second copper layer.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The utility model provides a battery protection shield's a specific embodiment is as shown in fig. 1 to fig. 2, including a plurality of copper cortex layers that set up on main part 1 and the main part 1. The battery protection board described in this embodiment can reduce the internal resistance of the battery protection board, and then reduce the temperature rise, prolong service life.

The main body 1 is provided with two layers of flexible circuit boards which are arranged in a stacked mode, and the two layers of flexible circuit boards are connected in a reflow soldering or hot-pressing soldering mode. As a preferred embodiment, the present embodiment adopts a flexible circuit board in which two layers are stacked. The principle and process of reflow soldering are explained below: reflow soldering is soft soldering for mechanical and electrical connection between a soldering end or pin of a surface-mounted component and a pad of a printed board by remelting cream soft solder pre-distributed on the pad of the printed board; firstly, paste soft soldering materials such as tin paste are printed on the area A of the battery protection board, then reflow soldering of a single-sided mounting process is carried out, and at least two layers of flexible circuit boards are mounted on the battery protection board. The principle and process of thermocompression bonding are explained below: the hot press welding is to make the metal wire and the metal welding area pressed and welded together by using heating and pressurizing; tin is reserved in advance at the mounting position of the flexible circuit board on the battery protection board, soldering flux is dispensed, the flexible circuit board is mounted, and alignment hot-press welding is carried out.

Every layer the flexible circuit board is including 5 and the insulating layer 6 of the copper sheet layer and the range upon range of setting, two-layer 6 laminating settings of insulating layer, it is two-layer 5 of copper sheet layer are established two-layerly the outside of insulating layer 6, and the symmetry sets up. Copper layer 5 is including the first copper layer and the second copper layer that set up side by side, and the first copper layer 8 and the second copper layer 9 of two-layer flexible circuit board correspond the setting respectively, first copper layer 8 is used for connecting the anodal utmost point ear of battery, and second copper layer 9 is used for connecting battery negative pole utmost point ear, and copper layer 5 also is the essential element that produces the internal resistance as the essential element of electric current circulation, can make the parallelly connected setting on the circuit of copper layer 5 in the flexible circuit board of two-layer range upon range of setting like this. The through holes penetrate through the two layers of flexible circuit boards in the thickness direction, and the through holes are located in the portions, in the insulating layers 6, of the through holes and are plated with copper, so that the two layers of copper skin layers are conducted, and the conduction area is increased. The ink protection layer 4 is provided on the side of the copper skin layer 5, which side is remote from the insulating layer 6. A plurality of windows 7 distributed in an array are arranged in the ink protection layer 4 arranged on the outermost layer and can be used for observing the inner copper layer 5.

The copper skin layer 5 at the first end 2 of the main body is connected with a circuit board, and the circuit board is any one of two layers of stacked PCB boards, two layers of stacked flexible circuit boards or one layer of stacked PCB board and one layer of flexible circuit board; a connector is arranged on the copper layer 5 of the second end 3 of the main body.

The utility model also provides a battery, including foretell battery protection shield.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims (10)

1. A battery protection plate, comprising:

main part (1), be equipped with the flexible circuit board of two-layer range upon range of setting, every layer in main part (1) the flexible circuit board is including copper layer (5) and insulating layer (6) of range upon range of setting, two-layer the flexible board is two-layer insulating layer (6) laminating sets up, and is two-layer copper layer (5) are set up two-layerly separately the outside of insulating layer (6), and the symmetry sets up.

2. The battery protection plate according to claim 1, wherein the copper layer (5) comprises a first copper layer (8) and a second copper layer (9) which are arranged side by side, the first copper layer (8) and the second copper layer (9) of the two layers of flexible circuit board are respectively arranged correspondingly, the first copper layer (8) is used for connecting a battery positive electrode tab, and the second copper layer (9) is used for connecting a battery negative electrode tab.

3. The battery protection plate according to claim 2, wherein the two layers of flexible circuit boards are provided with a plurality of through holes penetrating in the thickness direction, and the portions of the through holes in the insulating layer (6) are plated with copper to conduct the two copper layers (5).

4. The battery protection plate according to any one of claims 1 to 3, further comprising an ink protection layer (4) disposed on a side of the copper skin layer (5) remote from the insulating layer (6).

5. The battery protection plate according to claim 4, wherein a plurality of windows (7) are arranged in an array in the ink protection layer (4) at the outer layer.

6. The battery protection plate according to any one of claims 1 to 3, wherein the copper skin (5) of the first end (2) of the main body is connected to a circuit board.

7. The battery protection plate as recited in claim 6, wherein the circuit board is any one of two layers of PCB plates disposed in a stack, two layers of flexible circuit boards disposed in a stack, or one layer of PCB plate and one layer of flexible circuit board disposed in a stack.

8. The battery protection plate according to claim 7, wherein the copper skin (5) of the second end (3) of the main body is provided with a connector.

9. The battery protection plate as claimed in one of claims 1 to 3, wherein the at least two flexible circuit boards are connected by reflow soldering or thermocompression soldering.

10. A battery comprising the battery protection sheet as set forth in any one of claims 1 to 9.

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