How to repair batteries that have lost power after long-term storage

　　What should I do if the battery is not fully charged?

　　Let's first check if the battery lacks electrolyte (or if there is a short circuit). If the electrolyte is dry, add distilled water first. After adding enough, do not cover the top of the battery before proceeding to the next step, Activate - Connect a 220V/200W regular incandescent lamp and battery in series (regardless of polarity) to a 220V AC power source at home to see if the bulb can light up normally. If it can light up normally, continue to power on for about 1 minute before disconnecting the power. Wait for a few minutes and then turn it on again for another minute. Repeat this process for 3-5 times before connecting the battery to the charger for 15 hours of normal charging. If it's still not possible, then we can consider replacing it with a new one.

　　Several common methods for battery repair

　　Battery repair: common methods for battery repair

　　Several common battery repair methods are not difficult. If the entire set of batteries (in series) are repaired simultaneously, it is difficult (except for those with sulfurized batteries). As long as one battery in the battery pack is physically damaged, the effect of using repair instruments is not obvious. However, separate battery packs should be used, and each battery should be repaired separately. Not only can the type of battery damage be detected, but different methods can also be used for repair. Therefore, the key to repairing a battery is to repair a single battery (usually 12V), Jiajun Electric Vehicle Co., Ltd. (briefly introduce several methods for you: 1. Pulse repair method:

　　A better method to eliminate sulfurization in batteries is to use pulse repair. When repairing a battery, the instantaneous voltage of the pulse is generally between 60V and 300V according to the functional needs of the product. For example, the pulse voltage value of products used for battery life extension is not too large, specifically because the pulse voltage value of battery repair products can be too large (if the pulse voltage value is too large, it will cause damage to the battery plate), the pulse voltage is high, the battery repair time is short, and the pulse voltage is low, The repair time of the battery is relatively long. Although the voltage at the moment of the pulse is very high, the average voltage is not high and there is no harm to the human body, making it very safe. In terms of solid-state physics, any insulation layer can be broken down at a high enough voltage. Once the insulation layer is broken down, the coarse lead sulfate will appear in a conductive state. If an instantaneous high voltage is applied to insulation with high resistivity, large lead sulfate crystals can also be broken down. If the high voltage is short enough and current limiting is applied, the charging current will not be large and a large amount of gas will not form under the condition of breaking through the insulation layer. The strong gas evolution capacity of the battery is positively related to the charging current and charging time. If the pulse width is short enough and the duty cycle is large enough, it can ensure the breakdown of coarse lead sulfate crystals, and the micro charging that occurs at the same time cannot form gas evolution in time. This achieves pulse elimination vulcanization. There are specialized pulse generators available for sale in the market, but it is important to choose one with good results. The resonance between the pulse and the battery electrode plate is very important, which depends on the size and amplitude of the pulse frequency. If the pulse frequency and amplitude are not enough, the effect of eliminating sulfuric acid crystallization cannot be achieved. If the frequency and amplitude are too large, it will eliminate sulfurization and damage the electrode plate, and gas evolution phenomenon will occur; At the same time, there are also many types of pulse waveforms that can be displayed on an oscilloscope. A good pulse wave can effectively break through the insulation layer and reduce the crushed sulfuric acid crystal powder into the electrolyte without damaging the battery. This is like people crushing stones. When facing a large stone, is it effective to use a pickaxe or a hoe? You can tell at a glance. 2. Strong current repair method:

　　The strong current repair method is a method of repairing batteries using long-lasting high voltage or high current during charging, often used when the pulse repair method is not effective. Firstly, high voltage repair method: This method mainly adopts a charging voltage of 1.3-1.5 times the nominal voltage of the battery to repair the battery. For example, when a 36V battery is charged with a 48V charger at a constant or close charging current, the charging time should be controlled in moderation and not too long, otherwise the battery will generate heat due to gas evolution. This method has a certain repair effect on batteries with short circuits and low softening of the plates, but improper use can also cause damage to the pressure points of the battery plates. Secondly, high current repair method: This method mainly adopts a charging current 1.5 to 2.0 times higher than the usual charging current to repair the battery, such as using a 3-4A charger for charging a 20AH battery, which has the same advantages and disadvantages as the "high voltage repair method". 3. Full charge and full discharge repair method:

　　The full charge and full discharge repair method refers to the method of repairing a battery by fully charging it and then discharging it completely. The full charge and full discharge repair method mainly has a certain repair effect on slightly damaged batteries, and at the same time, this method can effectively activate the active substances in the deep layer of the battery, improving the battery capacity. For batteries with mild vulcanization and high internal resistance, the key to this method is to fully discharge each individual battery, and to fully charge and discharge each individual battery 1-2 times. The capacity of the battery can generally be improved. The full charge and full discharge repair method should not be used frequently, and should be used at least once every six months

　　Use once every three months. 4. Water replenishment and repair method:

　　What should I do if the battery is not fully charged?

　　Several common methods for battery repair

　　Battery repair: common methods for battery repair

　　Low temperature and high energy density 18650 3500mAh

　　Specific energy 252Wh/kg, discharge capacity at -40 ℃ ≥ 70%

　　Charging temperature: 0-45 ℃

　　-Discharge temperature: -40~+55 ℃

　　-40 ℃ supports maximum discharge rate: 1C

　　-40 ℃ 0.5 discharge capacity retention rate ≥ 70%

　　Click on details

　　Use once every three months. 4. Water replenishment and repair method:

　　Non magnetic low temperature 18650 2200mAh

　　-40 ℃ 0.5C discharge capacity ≥ 70%

　　Charging temperature: 0-45 ℃

　　Discharge temperature: -40~+55 ℃

　　-Maximum discharge rate at 40 ℃: 1C

　　-40 ℃ discharge capacity retention rate: 0.5C discharge capacity ≥ 70%

　　Click on details

　　The "water loss" of the battery can be repaired by supplementing it with water, with the aim of diluting the increased concentration of sulfuric acid for normal electrolysis reaction. The method of replenishing water is relatively simple. Just open the upper cover of the battery and you can see six circular holes. Inject a certain amount of distilled water into each circular hole and soak it for more than 24 hours. Only distilled water can be added, and water of other ingredients, including purified water, cannot be added. Because there are various metal molecules in water of other ingredients, adding them into the battery will easily cause self-discharge and damage the battery.

　　5. Reassembly repair method:

　　Electric vehicle batteries are generally composed of several batteries connected in series, and the battery damage is multifaceted. There may be several aspects of damage to the battery at the same time: for sulfurized batteries, the use effect is better after repair; However, for batteries with softened or disconnected plates, they can be repaired immediately. Due to physical hard injuries, their reusability value is not significant, and the service time after repair is also extremely short, resulting in even worse results. The best method is to replace the batteries that have little repair value with old ones (replacing them with old batteries with more than 80% capacity), and then reassemble them with the remaining few batteries. Batteries have a lifespan, and battery repair only maintains their normal design life. It is unscientific and impractical to promote battery repair products that repair batteries damaged by any factor just like new batteries, and to ensure that the battery can extend its service life by several times. Any damage to the battery caused by any factor has an impact on the battery life. The problem is how to reduce the damage to the battery and how to reduce the impact on the battery life. Below is a brief introduction to several daily maintenance methods for electric vehicle batteries for user reference.

　　1、 Go to 'Drive every day, charge every day'. Lead acid batteries do not have memory, so the rapid reduction in capacity is mainly due to some reasons such as battery vulcanization, "water loss", "power loss", etc. The most feared factor for batteries is "low voltage". Batteries often "low voltage", and the battery electrode plates are easily injured. Our investigation found that up to 70% of electric vehicle batteries have reduced capacity, which is caused by the strong current (starting current) when the electrode plates are discharged, causing strain (especially obvious electric friction), The electrode plate strain belongs to the physical damage of the battery and cannot be repaired. Therefore, it is inevitable to use the car and charge it every day to ensure that the battery has sufficient voltage at all times.

　　2、 Regularly replenish distilled water. Users generally believe that maintenance free batteries do not require adding water, but this statement is actually incorrect. Maintenance-free batteries generate heat during charging and high current discharge, and if there is heat, water will evaporate. Although the process of water evaporation is very slow, over time, the accumulated amount of water evaporation cannot be underestimated. Therefore, the battery should be replenished with water every 6 months or so to extend its service life. 3、 The electric vehicle starts with skillful force. Electric vehicles have a high starting current, especially the electric friction of high-power motors, which results in a higher starting current. High current can damage the battery plate, and the best way is to cycle like a bicycle before starting and then start the electric vehicle power supply. Of course, many electric motorcycles do not have cycling devices, so there is no way.

　　4、 Deep discharge the battery once a quarter. After using the battery for a period of time, there will inevitably be some active substances sinking. If the active substances are not activated in a timely manner, it will inevitably have some impact on the capacity of the battery. Therefore, when using electric vehicles frequently, it is necessary to achieve deep discharge of the battery once a quarter.

　　5、 Regularly observe the quality of the charger. The charging process of a new battery usually takes 6-8 hours. After fully charging, the charger will turn on a green light. If the charging time is too long, it is necessary to check whether the voltage protection device of the charger is damaged. If it is damaged, it is necessary to replace the charger in a timely manner, otherwise it is very easy to charge the battery. Additionally, do not purchase a fast charger as fast charging can also harm the battery plate.

　　6、 When not using the battery for a long time, it is necessary to charge the battery at least once a month. The purpose of doing so is to prevent the battery from being stored for too long, which can cause sulfurization and "loss of power" of the battery.

　　7、 Prevent the battery from being exposed to sunlight. Explosive exposure to sunlight can increase the temperature of the battery, so be careful.

　　8、 Use battery protectors as soon as possible. The battery protector, also known as the pulse generator, continuously eliminates the sulfurization of the battery and keeps the electrode plate "clean", thereby extending the service life of the battery. However

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