A mobile phone lithium battery with overcharge prevention function

Abstract

The present invention discloses a mobile phone lithium battery with overcharge prevention, comprising a battery body, a battery shell disposed on the outside of the battery body, a pole disposed at the middle position inside the battery shell, a pressure valve disposed on one side of the top of the battery shell, a positive terminal disposed on the side of the pressure valve close to the pole, positive plates disposed at both ends of the pole, and a circuit board disposed on the side of the positive plate away from the pole. The present invention controls current detection, temperature detection and voltage detection through a power management chip to detect the power, temperature and voltage of the battery being charged, and imports the detection results into data analysis and calculation. When the temperature exceeds or equals to 60°C, charging is stopped directly, and when the voltage of the battery being charged is greater than or equal to 4.2V, the battery is directly stopped from charging, thereby reducing the danger brought about during the charging process and avoiding the problem of battery capacity reduction.

Description

Technical Field

[0001] The invention relates to the technical field of lithium batteries, in particular to a mobile phone lithium battery with the function of preventing overcharging. Background Art

[0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have now become mainstream, such as mobile phone lithium batteries.

[0003] However, existing mobile phone lithium batteries are prone to side effects when the lithium battery cell is overcharged to a voltage higher than 4.2V, and the higher the overcharge voltage, the higher the danger. After the lithium battery cell voltage is as high as 4.2V, the number of lithium atoms remaining in the positive electrode material is less than half, and the storage cell will often collapse at this time, causing a permanent decrease in battery capacity. If charging continues, since the storage cell of the negative electrode is already full of lithium atoms, subsequent lithium metal will accumulate on the surface of the negative electrode material. These lithium atoms will grow dendritic crystals from the negative electrode surface toward the lithium ions, and these lithium metal crystals will pass through the diaphragm paper, causing a short circuit between the positive and negative electrodes. Sometimes the battery explodes before the short circuit occurs, thereby reducing the safety performance of mobile phone lithium batteries and reducing the service life of mobile phone lithium batteries. Summary of the invention

[0004] The object of the present invention is to provide a mobile phone lithium battery with the function of preventing overcharging, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mobile phone lithium battery with the function of preventing overcharging, comprising a battery body, a battery shell is arranged on the outside of the battery body, a pole is arranged at the middle position inside the battery shell, a pressure valve is arranged on one side of the top of the battery shell, a positive terminal is arranged on the side of the pressure valve close to the pole, positive plates are arranged at both ends of the pole, a circuit board is arranged on the side of the positive plate away from the pole, a power management chip is installed on one end of the circuit board close to the positive plate, a negative pole is arranged on the side of the circuit board away from the positive plate, and a negative pole is arranged on the top of one end of the negative pole close to the circuit board.

[0006] Preferably, the output end of the power management chip is electrically connected to current detection, the output end of the power management chip is electrically connected to temperature detection, the output end of the power management chip is electrically connected to voltage detection, and the output end of the voltage detection is electrically connected to data analysis and calculation, and the output end of the power management chip is bidirectionally electrically connected to the output end of the positive plate.

[0007] Preferably, the output ends of the voltage detection, temperature detection and current detection are all electrically connected to the input end of the data analysis and calculation, and the output end of the data analysis and calculation is electrically connected to the input end of the power management chip.

[0008] Preferably, the output end of the power management chip is bidirectionally electrically connected to the output end of the negative electrode plate, and the output end of the positive electrode plate is bidirectionally electrically connected to the output end of the negative electrode plate.

[0009] Preferably, the output end of the positive electrode plate is electrically connected to a pole, and the output end of the pole is bidirectionally electrically connected to the positive electrode plate.

[0010] Preferably, the negative electrode plate is made of lithium metal or lithium alloy, and the positive electrode plate is made of lithium cobalt oxide.

[0011] Preferably, the bottom of the positive terminal is connected to the top of the pole.

[0012] Preferably, the battery body is a rectangular parallelepiped structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention controls current detection, temperature detection and voltage detection through a power management chip to detect the power, temperature and voltage of a battery being charged, and imports the detection results into data analysis and calculation; when the temperature exceeds or is equal to 60°C, charging is directly stopped; and when the voltage of the battery being charged is greater than or equal to 4.2V, charging of the battery is directly stopped, thereby reducing the danger brought about during the charging process and avoiding the problem of battery capacity reduction; by controlling the voltage, power and temperature, short circuit caused by the generation of lithium metal junctions is avoided, thereby improving the safety performance of mobile phone lithium batteries and increasing the service life of mobile phone lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 is a system flow chart of the circuit board of the present invention;

[0016] Figure 3 It is a work flow chart of the present invention;

[0017] Figure 4 It is a flow chart of the working principle of the present invention.

[0018] In the figure: 1. Battery body; 2. Battery shell; 3. Pressure valve; 4. Post; 5. Positive plate; 6. Circuit board; 7. Power management chip; 8. Negative plate; 9. Negative electrode; 10. Positive terminal. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-4 An embodiment of the present invention is as follows: a mobile phone lithium battery with overcharge prevention function, comprising a battery body 1, a battery shell 2 is arranged on the outer side of the battery body 1, a pole 4 is arranged at the middle position inside the battery shell 2, a pressure valve 3 is arranged on one side of the top of the battery shell 2, a positive terminal 10 is arranged on the side of the pressure valve 3 close to the pole 4, positive plates 5 are arranged at both ends of the pole 4, a circuit board 6 is arranged on the side of the positive plate 5 away from the pole 4, a power management chip 7 is installed on one end of the circuit board 6 close to the positive plate 5, a negative electrode 9 is arranged on the side of the circuit board 6 away from the positive plate 5, and a negative plate 8 is arranged on the top of the negative electrode 9 close to one end of the circuit board 6.

[0021] The present invention introduces electric energy into the interior of the battery body 1 from the positive terminal 10, and converts the electric energy into lithium ions, and the lithium ions separate from the positive plate 5 and enter the negative plate 8. During discharge, the lithium ions separate from the negative plate 8 and enter the positive plate 5, and the lithium ions are converted into electric energy, and then the electric energy is exported from the positive terminal 10, thereby completing the charging and discharging process, and the battery body 1 is detected by the power management chip 7, thereby better avoiding overcharging of the mobile phone lithium battery.

[0022] Please refer to the attached Figure 3 The output end of the power management chip 7 is electrically connected to current detection, the output end of the power management chip 7 is electrically connected to temperature detection, the output end of the power management chip 7 is electrically connected to voltage detection, and the output end of the voltage detection is electrically connected to data analysis and calculation, and the output end of the power management chip 7 is bidirectionally electrically connected to the output end of the positive plate 5.

[0023] This mobile phone lithium battery with overcharge prevention function detects the voltage, temperature and power of the battery main body 1 through the current detection, temperature detection and voltage detection. When the temperature, voltage and power of the battery main body 1 are within the standard, the battery main body 1 is continuously charged, thereby better preventing the battery main body 1 from being overcharged, improving the safety performance of the battery main body 1 and increasing the service life of the battery main body 1.

[0024] Please refer to the attached Figure 3 and 4 The output ends of voltage detection, temperature detection and current detection are all electrically connected to the input end of data analysis and calculation, and the output end of data analysis and calculation is electrically connected to the input end of the power management chip 7.

[0025] The mobile phone lithium battery with overcharge prevention function detects the voltage, temperature and current of the battery body 1 at the same time through voltage detection, temperature detection and current detection. When all three conditions are met, the battery body 1 is charged normally.

[0026] Please refer to the attached Figure 1 and 3 The output end of the power management chip 7 is bidirectionally electrically connected to the output end of the negative electrode plate 8 , and the output end of the positive electrode plate 5 is bidirectionally electrically connected to the output end of the negative electrode plate 8 .

[0027] This type of mobile phone lithium battery with overcharge prevention has a negative plate 8 and a positive plate 5. When charging, lithium ions separate from the positive plate 5 and enter the negative plate 8. When discharging, lithium ions separate from the negative plate 8 and enter the positive plate 5, and the lithium ions are converted into electrical energy, thereby completing the charging and discharging process.

[0028] Please refer to the attached Figure 1 The output end of the positive electrode plate 5 is electrically connected to the pole 4, and the output end of the pole 4 is bidirectionally electrically connected to the positive electrode plate 5. The negative electrode plate 8 is made of lithium metal or lithium alloy, and the positive electrode plate 5 is made of lithium cobalt oxide. The bottom of the positive terminal 10 is connected to the top of the pole 4, and the battery body 1 has a rectangular structure.

[0029] This type of mobile phone lithium battery with overcharge prevention uses lithium metal or lithium alloy through the negative plate 8 and lithium cobalt oxide through the positive plate 5, so as to better convert electrical energy and store it inside the battery body 1, so that the use effect of the battery body 1 is better.

[0030] Working principle: During charging, electric energy is introduced from the positive terminal 10 into the interior of the battery body 1, and the electric energy is converted into lithium ions, and the lithium ions are separated from the positive plate 5 and enter the negative plate 8. During discharging, the lithium ions are separated from the negative plate 8 and enter the positive plate 5, and the lithium ions are converted into electric energy, and then the electric energy is extracted from the positive terminal 10, thereby completing the charging and discharging process. During the charging process, voltage detection, temperature detection and current detection simultaneously detect the voltage, temperature and electric quantity of the battery body 1, and at the same time, the detected voltage, temperature and electric quantity are imported into the data analysis calculation, aligned for analysis and the analysis results are imported into the power management chip 7. During the charging process, when the temperature of the battery main body 1 is greater than or equal to 60°C, the power management chip 7 controls the battery main body 1 to stop charging, and the temperature rise of the battery main body 1 during the charging process cannot exceed 30°C, otherwise charging will be stopped. When the battery voltage reaches 4.2V, the power management chip 7 controls the battery main body 1 to stop charging. When the power inside the battery main body 1 reaches 100%, charging will be stopped, and when the temperature, voltage and power of the battery main body 1 are not exceeded, charging will continue, thereby better preventing the battery main body 1 from overcharging, improving the safety performance of the battery main body 1, and increasing the service life of the battery main body 1.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A mobile phone lithium battery with overcharge prevention function, comprising a battery body (1), characterized in that: A battery shell (2) is arranged on the outside of the battery body (1), a pole (4) is arranged at the middle position inside the battery shell (2), a pressure valve (3) is arranged on one side of the top of the battery shell (2), a positive terminal (10) is arranged on the side of the pressure valve (3) close to the pole (4), positive plates (5) are arranged at both ends of the pole (4), a circuit board (6) is arranged on the side of the positive plate (5) away from the pole (4), a power management chip (7) is installed on the end of the circuit board (6) close to the positive plate (5), a negative electrode (9) is arranged on the side of the circuit board (6) away from the positive plate (5), and a negative electrode plate (8) is arranged on the top of the negative electrode (9) close to the end of the circuit board (6); The negative electrode plate (8) is made of lithium metal or lithium alloy, and the positive electrode plate (5) is made of lithium cobalt oxide; The output end of the power management chip (7) is electrically connected to current detection, the output end of the power management chip (7) is electrically connected to temperature detection, the output end of the power management chip (7) is electrically connected to voltage detection, and the output end of the voltage detection is electrically connected to data analysis and calculation, and the output end of the power management chip (7) is bidirectionally electrically connected to the output end of the positive plate (5).

2. A mobile phone lithium battery with overcharge prevention function according to claim 1, characterized in that: The output ends of the voltage detection, temperature detection and current detection are all electrically connected to the input end of the data analysis and calculation, and the output end of the data analysis and calculation is electrically connected to the input end of the power management chip (7).

3. A mobile phone lithium battery with overcharge prevention function according to claim 1, characterized in that: The output end of the power management chip (7) is bidirectionally electrically connected to the output end of the negative electrode plate (8), and the output end of the positive electrode plate (5) is bidirectionally electrically connected to the output end of the negative electrode plate (8).

4. A mobile phone lithium battery with overcharge prevention function according to claim 1, characterized in that: The output end of the positive electrode plate (5) is electrically connected to the pole (4), and the output end of the pole (4) is bidirectionally electrically connected to the positive electrode plate (5).

5. The mobile phone lithium battery with overcharge prevention function according to claim 1, characterized in that: The bottom of the positive terminal (10) is connected to the top of the pole (4).

6. A mobile phone lithium battery with overcharge prevention function according to claim 1, characterized in that: The battery body (1) is in a rectangular parallelepiped structure.

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