Mobile phone lithium battery capable of preventing overchargeTechnical Field
The invention relates to the technical field of lithium batteries, in particular to a mobile phone lithium battery capable of preventing overcharge.
Background
The lithium battery is a battery which uses lithium metal or lithium alloy as a negative electrode material and uses nonaqueous electrolyte solution, and the lithium metal is very active in chemical characteristics, so that the processing, storage and use of the lithium metal have very high requirements on environment, and along with the development of scientific technology, the lithium battery is becoming a mainstream at present, for example, a mobile phone lithium battery.
However, in the existing mobile phone lithium battery, after the lithium battery core is overcharged to a voltage higher than 4.2V, side effects are easy to generate, the higher the overcharged voltage is, the higher the danger is, the less half of lithium atoms are left in the positive electrode material after the lithium battery core is higher than 4.2V in voltage, the storage cell always collapses at this time, the battery capacity is permanently reduced, if the battery is continuously charged, the storage cell of the negative electrode is filled with lithium atoms, the subsequent lithium metal can be accumulated on the surface of the negative electrode material, dendritic crystals can grow from the surface of the negative electrode to the direction from the lithium ions, and the lithium metal crystals can penetrate through diaphragm paper, so that the positive electrode and negative electrode short circuit is generated, and sometimes the battery explodes before the short circuit occurs, thereby reducing the safety performance of the mobile phone lithium battery and the service life of the mobile phone lithium battery.
Disclosure of Invention
The present invention is directed to a lithium battery for mobile phone capable of preventing overcharge, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the mobile phone lithium battery with the function of preventing overcharging comprises a battery main body, wherein a battery shell is arranged on the outer side of the battery main body, a pole column 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 electrode end is arranged on one side of the pressure valve, which is close to the pole column, a positive electrode plate is arranged at two ends of the pole column, a circuit board is arranged on one side, which is far away from the pole column, of the positive electrode plate, a power management chip is arranged at one end, which is close to the positive electrode plate, of the circuit board, a negative electrode is arranged on one side, which is far away from the positive electrode plate, of the circuit board, and a negative electrode plate is arranged on the top, which is close to one end of the circuit board.
Preferably, the output end of the power management chip is electrically connected with current detection, the output end of the power management chip is electrically connected with temperature detection, the output end of the power management chip is electrically connected with voltage detection, the output end of the voltage detection is electrically connected with data analysis and calculation, and the output end of the power management chip is in bidirectional electrical connection with the output end of the positive plate.
Preferably, the output ends of the voltage detection, the temperature detection and the current detection are all electrically connected with the input end of the data analysis calculation, and the output end of the data analysis calculation is electrically connected with the input end of the power management chip.
Preferably, the output end of the power management chip is electrically connected with the output end of the negative plate in a bidirectional manner, and the output end of the positive plate is electrically connected with the output end of the negative plate in a bidirectional manner.
Preferably, the output end of the positive plate is electrically connected with a pole, and the output end of the pole is in bidirectional electrical connection with the positive plate.
Preferably, the negative electrode plate is made of lithium metal or lithium alloy, and the positive electrode plate is made of lithium cobaltate.
Preferably, the bottom of the positive terminal communicates with the top of the post.
Preferably, the battery body has a rectangular parallelepiped structure.
Compared with the prior art, the mobile phone lithium battery has the beneficial effects that the power management chip is used for controlling current detection, temperature detection and voltage detection to detect the electric quantity, temperature and voltage of the battery being charged, and guiding the detection result into data analysis and calculation, when the temperature exceeds or equals to 60 ℃, the charging is directly stopped, and when the voltage of the battery being charged is greater than or equal to 4.2V, the battery is directly stopped from being charged, so that the danger in the charging process is reduced, the problem of capacity reduction of the battery is avoided, and the phenomenon of short circuit caused by lithium metal junction is avoided by controlling the voltage, the electric quantity and the temperature, so that the safety performance of the mobile phone lithium battery is improved, and the service life of the mobile phone lithium battery is prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a system flow diagram of a circuit board of the present invention;
FIG. 3 is a workflow diagram of the present invention;
Fig. 4 is a flow chart of the working principle of the invention.
In the figure, 1, a battery main body, 2, a battery shell, 3, a pressure valve, 4, a pole post, 5, a positive plate, 6, a circuit board, 7, a power management chip, 8, a negative plate, 9, a negative electrode and 10, and a positive electrode end.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, an embodiment of the invention provides a mobile phone lithium battery capable of preventing overcharge, which comprises a battery main body 1, wherein a battery case 2 is arranged on the outer side of the battery main body 1, a pole 4 is arranged at the middle position inside the battery case 2, a pressure valve 3 is arranged on one side of the top of the battery case 2, a positive electrode 10 is arranged on one side of the pressure valve 3, which is close to the pole 4, positive electrode plates 5 are arranged at two ends of the pole 4, a circuit board 6 is arranged on one side, which is far away from the pole 4, of the positive electrode plates 5, a power management chip 7 is arranged at one end, which is close to the positive electrode plates 5, of the circuit board 6, a negative electrode 9 is arranged at one side, which is far away from the positive electrode plates 5, of the circuit board 6, and a negative electrode plate 8 is arranged at the top, which is close to one end of the circuit board 6, of the negative electrode 9.
According to the invention, electric energy is led into the battery body 1 from the positive electrode end 10 and is converted into lithium ions, the lithium ions are separated from the positive electrode plate 5 and enter the negative electrode plate 8, and during discharging, the lithium ions are separated from the negative electrode plate 8 and enter the positive electrode plate 5, and are converted into electric energy, and then the electric energy is led out from the positive electrode end 10, so that the charging and discharging processes are completed, and the battery body 1 is detected through the power management chip 7, so that the overcharge of a lithium battery of a mobile phone is better avoided.
Referring to fig. 3 in detail, the output end of the power management chip 7 is electrically connected with a current detection, the output end of the power management chip 7 is electrically connected with a temperature detection, the output end of the power management chip 7 is electrically connected with a voltage detection, the output end of the voltage detection is electrically connected with a data analysis and calculation, and the output end of the power management chip 7 is electrically connected with the output end of the positive plate 5 in two directions.
This kind of have cell-phone lithium cell that prevents to overcharge carries out voltage, temperature and electric quantity's detection to battery body 1 simultaneously through electric current detection, temperature detection and voltage detection that set up, under the temperature, voltage and the electric quantity of battery body 1 all do not have the condition of exceeding the standard, last charging to better prevent that battery body 1 from overcharging, improved the security performance of battery body 1, and improved battery body 1's life.
Referring to fig. 3 and 4 for details, the output terminals of the voltage detection, the temperature detection and the current detection are electrically connected to the input terminal of the data analysis calculation, and the output terminal of the data analysis calculation is electrically connected to the input terminal of the power management chip 7.
The battery body 1 is normally charged under the condition that the voltage, the temperature and the current of the battery body 1 are detected through voltage detection, temperature detection and current detection.
Referring to fig. 1 and 3 for details, the output end of the power management chip 7 is electrically connected to the output end of the negative plate 8 in both directions, and the output end of the positive plate 5 is electrically connected to the output end of the negative plate 8 in both directions.
This kind of cell-phone lithium cell with prevent overcharging passes through negative plate 8 and positive plate 5, and when charging, lithium ion breaks away from positive plate 5 and gets into negative plate 8, and during discharging, lithium ion breaks away from negative plate 8 and gets into positive plate 5 to with lithium ion conversion electric energy, thereby accomplish the process of charging and discharging.
Referring to fig. 1 for details, an output end of a positive electrode plate 5 is electrically connected with a pole 4, and the output end of the pole 4 is electrically connected with the positive electrode plate 5 in two directions, a negative electrode plate 8 is made of lithium metal or lithium alloy, the positive electrode plate 5 is made of lithium cobaltate, a bottom of a positive electrode end 10 is communicated with a top of the pole 4, and a battery body 1 is in a cuboid structure.
This kind of cell-phone lithium cell with prevent to overcharge adopts lithium metal or lithium alloy through negative plate 8, and positive plate 5 adopts lithium cobaltate to better converts the electric energy and stores in the inside of battery body 1, makes battery body 1's result of use better.
The battery comprises a battery body 1, a power management chip 7, a battery body 1, a battery voltage detection chip 7, a battery body 1, a battery life detection chip, a power management chip 7, a power management chip, a battery life detection chip and a power management chip 7, wherein in the process of charging, electric energy is led into the battery body 1 from an anode end 10 and converted into lithium ions, and the lithium ions are separated from a positive plate 5 and enter a negative plate 8, in the process of discharging, the lithium ions are separated from the negative plate 8 and enter the positive plate 5, and are converted into the electric energy, and then the electric energy is led out from the anode end 10, so that the charging and discharging processes are completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.