Introduces the operation principle of lithium-ion batteries

Source: 2020 - 03 - 24 13:28 hits: principle of lithium-ion batteries, lithium ion battery is a secondary battery ( Rechargeable battery) , which rely on lithium ion in reciprocating motion between the two electrodes and brake. As the energy in the development of downstream industries such as cars, lithium ion battery production scale expands unceasingly. 1, the working principle of the 1. The anode structure LiCoO2 + conductive agent, binder, PVDF) + collector fluid ( Aluminum foil) 2. The structure of the negative graphite + conductive agent, thickening agent ( CMC) + binder ( SBR) Collecting liquid + ( Copper foil) You should know the lithium ion battery & lt; 目标=平等href = http://www。 dghoppt。 cn/product- 列表, 13. html3。 The working principle of 3. 1 power supply to recharge the battery charging process. At this point, the positive on the electron from the external circuit to run to the cathode. Lithium ion lithium ion from the anode 'jump' into the electrolyte. At present: the anode reaction is: anode reaction is: you should know the lithium ion battery & lt; 目标=平等href = http://www。 dghoppt。 cn/product- 列表, 13. html3。 2 battery discharge has permanently discharge and constant resistance discharge, discharge process of constant discharge is, in fact, add a variable resistor in an external circuit, can changes with the change of the voltage, constant resistance discharge the battery plus the cathode, and is the nature of a resistor through electronic. Therefore, as long as the cathode electron cannot move away from the cathode to the anode, the battery will not discharge. Electronic and lithium ion in the same direction but with different ways. When they discharge, through the electronic conductor ran away from the cathode to the anode. Lithium ion lithium ion from the cathode 'leap into the electrolyte,' up 'clearance in curved hole,' swim 'to the anode, where it has come with the electronic combination. 3. Charge and discharge characteristics of 3 cells are very LiCoO2, LiNiO2 and LiMn2O2. At the same time, LiCoO2 this stable crystal is a kind of layer structure. However, when x lithium ion removal from the LiCoO2, will change its structure. The study found that when x & gt; 0. B1-5 Xcoo2 structure is extremely stable, crystal collapse will happen. The external performance is the collapse of the cell. Therefore, in the process of application, the battery should be by applying a certain amount of charging voltage to control the b1 - The x value of xcoo2. Charging voltage is generally not greater than 4. 2 v, so x is less than 0. 5. At this point, the b1 - Xcoo2 crystal shape is still stable. - C6 themselves have their own characteristics, and when to positive LiCoO2 lee - for the first time C6, when lee returned to the anode discharge LiCoO2, but become a necessary part of li in the center of the cathode C6, to ensure that the next time the charging and discharging of normal embedded, or in a very short battery, to ensure that there is a lee at the anode C6 part of management usually after discharge threshold voltage: safe maximum charging voltage is 4. 2 2 V and below, discharge threshold voltage. 5 V and above. Recall effect is through the crystal works, the reaction in the lithium battery is rare. However, due to various reasons, lithium ion batteries continue to lose after repeatedly charging capacity. This is mainly due to the positive and negative electrodes of changed data. Look from the molecular level, the positive and negative on lithium ion hole structure will gradually collapse and congestion. From the chemical point of view, is the positive and negative data activity passivation, stability of other compounds appear side effects. In physics, the positive data will gradually fall off, and eventually reduce the battery charge and discharge process of the amount of lithium ions can move freely. Excessive charging and discharging, electrode in lithium ion battery form permanent damage, from the molecular level, can be intuitive understanding, anode carbon emissions will lead to excessive release of lithium ion and its layer structure in the autumn, excessive charging will take too much lithium ion shoehorned into the structure of cathode carbon, and makes some lithium ion can no longer be released.