Battery pack, power supply device and charging device

Abstract

The invention discloses a battery pack, a power supply device and a charging device. The battery pack comprises a housing and a plurality of electric cores arranged in the housing; and orientations of tabs of the plurality of electric cores are same. First conductive terminals corresponding to the tabs of the electric cores one by one are arranged at the housing; and each tab is connected with the corresponding first conductive terminal electrically. Besides, the surface with the first conductive terminals of the housing forms a first connecting surface. Therefore, a problem of rapid and secure charging and discharging of the battery can be solved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a battery pack, a power supply device and a charging device. Background technique [0002] Existing battery packs are stacked and packaged with multiple single-chip polymer battery cores with a nominal voltage (such as 3.7 volts), and then packaged in series by welding to obtain a battery pack to supply power to electrical equipment (such as drones, etc.) , Calculate the number of series connection according to the required voltage volts. The common battery is 6 cells connected in series to get a nominal voltage of 22.2 volts. The industry term is called "6S" battery. Due to the charge and discharge characteristics of lithium batteries that cannot be overcharged or overdischarged, it is necessary to lead out a wire from the two electrode contacts of each cell as a "balance line" to detect the voltage value of the single cell during the charging process. After one chip ...

AI Technical Summary

Problems solved by technology

Such a battery structure and use method face the following problems: 1. Due to the need for balance during charging, the charging time is too long

2. The circuit of the charging equipment is complicated, the cost is high and the failure rate of the charger is high, and energy is wasted in the balancing process

3. With the gradual aging of the battery during use, the consistency of the internal resistance of the battery cell gradually decreases, the balancing cost is getting higher and higher and the time consumption is gradually increasing, which makes the whole set of batteries fall into a vicious cycle and seriously shortens the battery design service life

4. Due to the series welding package, maintenance is inconvenient, and the detection of a single cell failure will affect the use of the entire battery pack

5. It is easy to produce overshoot phenomenon, and it is easy to explode or spontaneously ignite during the charging process, and there is a high risk

6. The more lithium batteries connected in series, the higher the operating voltage and charging voltage, and the greater the power, which increases the difficulty and cost of balancing. Therefore, many high-power electrical equipment (such as drones) use Two 6S batteries are used in series, which increases the failure rate of the fuselage circuit and also brings inconvenience to the battery replacement work

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