Charging detection system of battery pack

Abstract

Provided in the invention is a charging detection system of a battery pack. The charging detection system comprises a charging module, a common bus positive end, a common bus negative end, a relay, a batter pack formed by a plurality of battery modules, and a circuit detection system. The common bus positive unit is connected with a positive terminal of the battery pack; and the common bus negative unit is connected with a negative terminal of the battery pack. The common bus positive unit is provided with positive branch lines that are connected with positive electrodes of the battery modules, wherein the number of the positive branch lines are identical with that of the battery modules; and the common bus negative unit is provided with negative branch lines that are connected with negative electrodes of the battery modules, wherein the number of the negative branch lines is identical with that of the battery modules. According to the technical scheme, when charging equipment is used for charging the battery pack, a short circuit phenomena caused by relay aging can be effectively avoided; secure switching of the battery modules in the large battery pack can be realized; the connection error of the charging circuit can be prevented; inverse charging of the battery can be avoided and the direct short-circuit phenomenon can be prevented; security during the whole charging process can be ensured; and the human life and property security can be protected.

Description

Technical field [0001] The invention relates to a charging detection system. Background technique [0002] The traditional lithium-ion battery pack is composed of several battery packs in series and parallel. After the battery pack is charged and discharged for a long time, the battery packs of the battery pack are prone to cause imbalance, so when the battery pack is used for a period of time, it is necessary It is balanced to recharge it. The usual recharge method is to continue to charge it with a smaller current and fully charge the under-charged battery, which can restore the battery pack to its original state of use and increase application performance and service life. [0003] However, in actual operation, each battery pack corresponds to a small current supplementary device, which is impossible regardless of the cost or the complexity of the system. Therefore, there is an urgent need for a battery pack that can easily and effectively supplement energy. In the prior art, a...

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Problems solved by technology

[0003] However, in actual operation, each battery pack corresponds to a small current supplementary device, which is impossible in terms of cost and system complexity, so there is an urgent need for a battery pack that can easily and effectively supplement energy. equipment; in the prior art, a current supplementary device is used to charge the entire battery pack, and the current supplementary device can evenly charge multiple strings of batteries by switching, that is, in the form of a relay array, as long as it is through the relay array Regardless of the array mode, there is a process of switching from one string of batteries in the battery pack to another through relays, so the following situations may occur in this process: the control signal achieves successful switching, but due to Long-term and high-frequency switching of the relay leads to failure and sticking together, which may cause two strings of batteries to short-circuit through the relay, resulting in accidents; on the other hand, due to the battery power distribution, it is necessary to lead the wiring harness from each battery unit in the battery pack Connect the charging equipment separately, the complexity of the wiring harness can be imagined, the possibility of connection error is very high, if there is a wrong connection, it may cause recoil to the battery or a direct short circuit phenomenon, which may easily cause safety accidents and endanger life property safety

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