Polymer lithium ion battery with liquid storage function

Abstract

The utility model relates to the technical field of batteries, and discloses a polymer lithium ion battery with a liquid storage function. The polymer lithium ion battery with the liquid storage function comprises an aluminum-plastic packaging film, a positive plate and a negative plate, the positive plate is arranged in the aluminum-plastic packaging film, the negative plate is fixedly connected in the positive plate, the polymer lithium ion battery further comprises a positive lug, a negative lug and a liquid storage shell, the liquid storage shell is arranged in the negative plate, and the liquid storage shell is fixedly connected in the aluminum-plastic packaging film. The front side of the liquid storage shell is fixedly connected with a positive tab, and the front side of the liquid storage shell is fixedly connected with a negative tab. The electrolyte can be consumed in the use process of the battery, so that the electrolyte in the electrolyte storage shell can be compensated to the surface of the pole piece under the action of capillary force to form a new lithium source, the capacity of the battery is prevented from being attenuated, and the cycle life of the battery is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries and discloses a polymer lithium ion battery with a liquid storage function. Background Art

[0002] Polymer lithium-ion battery is a chemical battery, also known as polymer lithium battery. Compared with traditional batteries, it has higher energy density, smaller size and lighter weight. The uniqueness of this battery lies in its ultra-thin feature, which can be made into batteries of different shapes and capacities to meet the needs of different products. Since there is no excess electrolyte in polymer lithium-ion batteries, it is more reliable and stable than traditional lithium-ion batteries.

[0003] The patent with the patent authorization publication number CN218482292U discloses a polymer lithium-ion battery, including a battery cell and a PCB board, wherein the battery cell includes a battery cell body and two pole ears extending from one end of the battery cell body, the two pole ears are arranged relative to each other in the thickness direction of the battery cell body and have a set spacing, and the PCB board is provided with a connection point for connecting the pole ears. Although the above patent arranges the two pole ears of the battery cell relative to each other in the thickness direction of the battery cell, reduces the distance between the two pole ears in the width direction of the battery cell, and reduces the required length of the PCB board accordingly, thereby saving materials, during the long-term use of the polymer lithium-ion battery, due to the inevitable occurrence of side reactions inside the battery, the electrolyte will be continuously consumed, resulting in the attenuation of the battery capacity, thereby shortening the battery cycle life.

[0004] Therefore, a polymer lithium ion battery with a liquid storage function is needed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing patents that during the long-term use of polymer lithium-ion batteries, the electrolyte will be continuously consumed due to the inevitable occurrence of side reactions inside the battery, resulting in the attenuation of the battery capacity and thus shortening the battery cycle life, the utility model provides a polymer lithium-ion battery with a liquid storage function.

[0006] The utility model provides the following technical scheme: a polymer lithium ion battery with a liquid storage function, comprising an aluminum-plastic packaging film, a positive electrode sheet and a negative electrode sheet, wherein the positive electrode sheet is arranged inside the aluminum-plastic packaging film, the negative electrode sheet is fixedly connected inside the positive electrode sheet, and further comprising a positive electrode ear, a negative electrode ear and a liquid storage shell, wherein the liquid storage shell is arranged inside the negative electrode sheet, the positive electrode ear is fixedly connected to the front side of the liquid storage shell, and the negative electrode ear is fixedly connected to the front side of the liquid storage shell.

[0007] Optionally, it also includes a mounting shell, a hollow cavity, a wave heat sink and fixing bolts. The mounting shell is fixedly connected to the aluminum-plastic packaging film, a hollow cavity is arranged inside the mounting shell, a wave heat sink is installed on the top of the mounting shell, the wave heat sink is in contact with the aluminum-plastic packaging film, and a plurality of fixing bolts are threadedly arranged on the wave heat sink.

[0008] Optionally, it also includes a circuit protection board, a charging port, a USB output port, a first conduction wire and a second conduction wire. The positive ear is connected to the first conduction wire, the negative ear is connected to the second conduction wire, the first conduction wire and the second conduction wire are commonly and fixedly connected to the circuit protection board, the circuit protection board is provided with a charging port, and the circuit protection board is provided with a USB output port.

[0009] Optionally, a dust cover is also included, and both the charging port and the USB output port are covered with a dust cover.

[0010] Optionally, a separation film is also included, and the separation film is attached to the inner wall of the positive electrode sheet.

[0011] Optionally, an insulating sleeve is also included, and both the positive electrode ear and the negative electrode ear are covered with the insulating sleeve.

[0012] Compared with the prior art, the utility model provides a polymer lithium-ion battery with a liquid storage function, which has the following beneficial effects: 1. The battery will consume the electrolyte during use, and then the electrolyte in the liquid storage shell will be compensated to the surface of the electrode due to capillary force to form a new lithium source, thereby avoiding the attenuation of the battery capacity and extending the battery cycle life.

[0013] 2. The wave heat sink is in contact with the aluminum-plastic packaging film, so that the heat inside the battery is transferred to the wave heat sink, and then the battery is cooled, thereby preventing the battery from expanding due to high temperature.

[0014] 3. The current is limited and transmitted through the circuit protection board, thereby avoiding the high-energy operation of the polymer lithium-ion battery and shortening the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a covering diagram of the aluminum-plastic packaging film, the negative electrode ear and the insulating sleeve of the utility model.

[0017] Figure 3 It is a cover diagram of the positive electrode sheet, the negative electrode sheet and the liquid storage shell of the utility model.

[0018] Figure 4 This is a covering diagram of the installation shell, the wave heat dissipation plate and the first conductive line of the utility model.

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the circuit protection board, USB output port and the second conducting line of the utility model.

[0020] Explanation of the reference numerals: 1: aluminum-plastic packaging film, 2: positive electrode ear, 201: negative electrode ear, 3: positive electrode sheet, 4: negative electrode sheet, 5: liquid storage shell, 6: mounting shell, 601: hollow cavity, 7: wave heat dissipation plate, 8: fixing bolt, 9: circuit protection board, 10: charging port, 11: USB output port, 12: first conduction line, 1201: second conduction line, 13: dust cover, 14: isolation film, 15: insulating cover. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: A polymer lithium-ion battery with liquid storage function, see Figure 1-Figure 4 , including an aluminum-plastic packaging film 1, a positive electrode sheet 3 and a negative electrode sheet 4, the positive electrode sheet 3 is arranged inside the aluminum-plastic packaging film 1, the negative electrode sheet 4 is arranged inside the positive electrode sheet 3 by welding, the negative electrode sheet 4 is arranged inside the liquid storage shell 5, the liquid storage shell 5 is made of a permeable material, when the electrolyte is consumed, the electrolyte in the liquid storage shell 5 will be compensated to the surface of the electrode sheet, the positive electrode ear 2 is arranged on the front side of the liquid storage shell 5 by welding, the negative electrode ear 201 is arranged on the front side of the liquid storage shell 5 by welding, the inner wall of the positive electrode sheet 3 is attached with a separation film 14, and the positive electrode ear 2 and the negative electrode ear 201 are both covered with an insulating sleeve 15.

[0023] During the use of the lithium-ion battery, the liquid storage shell 5 is used to store excess electrolyte. The electrolyte will be continuously consumed during long-term use of the battery, and the electrolyte in the liquid storage shell 5 will be compensated to the surface of the electrode due to capillary force to form a new lithium source, thereby avoiding the attenuation of the battery capacity and extending the battery cycle life.

[0024] Example 2: Based on Example 1, please refer to Figure 1 and Figure 4 A mounting shell 6 is provided on the aluminum-plastic packaging film 1 by welding, a hollow cavity 601 is provided inside the mounting shell 6, a wave heat sink 7 is installed on the top of the mounting shell 6, the wave heat sink 7 increases the contact area with the air, thereby improving the heat dissipation effect, the wave heat sink 7 is in contact with the aluminum-plastic packaging film 1, and four fixing bolts 8 are threadedly provided on the wave heat sink 7.

[0025] When the polymer lithium-ion battery is in use, the battery will generate heat. The wave heat sink 7 is in contact with the aluminum-plastic packaging film 1, so that the heat inside the battery is transferred to the wave heat sink 7, thereby dissipating the heat of the battery, thereby preventing the battery from expanding due to high temperature.

[0026] See also Figure 4 and Figure 5 A first conductive wire 12 is connected to the positive ear 2, and a second conductive wire 1201 is connected to the negative ear 201. The first conductive wire 12 and the second conductive wire 1201 are jointly provided with a circuit protection board 9 by welding. A charging port 10 is provided on the circuit protection board 9. A USB output port 11 is provided on the circuit protection board 9. Both the charging port 10 and the USB output port 11 are provided with a dust cover 13. The dust cover 13 reduces the gap between the charging port 10 and the USB output port 11 and the mounting shell 6, thereby preventing dust from entering the interior of the battery.

[0027] When the polymer lithium-ion battery is discharging or charging, the first conduction line 12 transmits the current on the positive electrode ear 2 to the circuit protection board 9, and the second conduction line 1201 transmits the current on the negative electrode ear 201 to the circuit protection board 9, so that the circuit protection board 9 limits the transmission of the current, thereby avoiding the high-energy operation of the polymer lithium-ion battery and shortening the battery life.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polymer lithium-ion battery with a liquid storage function, comprising an aluminum-plastic packaging film (1), a positive electrode sheet (3) and a negative electrode sheet (4), wherein the positive electrode sheet (3) is arranged inside the aluminum-plastic packaging film (1), and the negative electrode sheet (4) is fixedly connected inside the positive electrode sheet (3), characterized in that: It also comprises a positive electrode ear (2), a negative electrode ear (201) and a liquid storage shell (5); the liquid storage shell (5) is arranged inside the negative electrode sheet (4); the positive electrode ear (2) is fixedly connected to the front side of the liquid storage shell (5); and the negative electrode ear (201) is fixedly connected to the front side of the liquid storage shell (5).

2. A polymer lithium-ion battery with liquid storage function as claimed in claim 1, characterized in that: It also comprises a mounting shell (6), a hollow cavity (601), a wave heat dissipation plate (7) and fixing bolts (8); the mounting shell (6) is fixedly connected to the aluminum-plastic packaging film (1); the mounting shell (6) is provided with a hollow cavity (601) inside; a wave heat dissipation plate (7) is installed on the top of the mounting shell (6); the wave heat dissipation plate (7) is in contact with the aluminum-plastic packaging film (1); and a plurality of fixing bolts (8) are threadedly provided on the wave heat dissipation plate (7).

3. A polymer lithium-ion battery with liquid storage function as claimed in claim 1, characterized in that: The device also comprises a circuit protection board (9), a charging port (10), a USB output port (11), a first conductive line (12) and a second conductive line (1201); the positive electrode ear (2) is connected to the first conductive line (12), the negative electrode ear (201) is connected to the second conductive line (1201), the first conductive line (12) and the second conductive line (1201) are fixedly connected to the circuit protection board (9), the circuit protection board (9) is provided with a charging port (10), and the circuit protection board (9) is provided with a USB output port (11).

4. A polymer lithium-ion battery with liquid storage function as claimed in claim 3, characterized in that: It also includes a dust cover (13), and the charging port (10) and the USB output port (11) are both covered with the dust cover (13).

5. A polymer lithium-ion battery with liquid storage function as claimed in claim 1, characterized in that: It also includes an isolation film (14), and the isolation film (14) is attached to the inner wall of the positive electrode sheet (3).

6. A polymer lithium-ion battery with liquid storage function as claimed in claim 5, characterized in that: It also includes an insulating sleeve (15), and the insulating sleeve (15) is sleeved on the positive electrode ear (2) and the negative electrode ear (201).

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