Battery module welding quality detection device
A battery module and detection device technology, applied in the direction of measuring devices, measuring electrical variables, measuring electricity, etc., can solve problems affecting the capacity and energy of the battery pack system, virtual welding, affecting the cycle life and safety performance of the battery pack, etc.
Pending Publication Date: 2022-05-17
杭州捷能科技有限公司
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Problems solved by technology
[0002] Lithium-ion battery cells are usually combined in series and parallel to form a module, and the module group is formed by welding the pole pieces, so the welding quality directly determines the electrical performance and safety performance of the battery pack. If the electrode piece cannot be well combined with the battery pole during the process, it will cause false welding. This welding will increase the contact resistance of the electrode piece, resulting in poor consistency of the battery system during charging and discharging, thus affecting the battery pack system. capacity and energy, and even affect the cycle life and safety performance of the battery pack
[0003] The existing welding methods for detecting battery modules mainly include plasma signal detection method, infrared temperature detection method, BMS voltage acquisition and analysis method, etc. When the BMS voltage acquisition and analysis method is used to test the assembled battery module, it is found that after the welding , can only disassemble and repair the module, and in this way the virtual solder joints of the module have been soldered to the collection line, so it cannot be repaired directly when repairing, but the connecting metal strip needs to be removed and a new metal strip should be used for welding
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[0018] Such as figure 1 As shown, a battery module welding quality detection device, the battery module 1 is composed of a plurality of lithium batteries, the detection device includes a power supply 2, an indicator component, a discharge load resistor 3, a control component and a signal acquisition component, the The discharge load resistor 3 is connected to the battery module 1 , and the signal acquisition component is connected in parallel with the battery module 1 for collecting the voltage signal of the battery module 1 .
[0019] Specifically, the control assembly includes a first control component and a second control component, the first control component and the second control component are connected in parallel and both are connected to the power supply 2, and the first control component is used to control The indication component is powered on or off, the second control part is used to control the discharge of the battery module 1, the first control part includes a ...
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The invention discloses a battery module welding quality detection device, the battery module is composed of a plurality of lithium batteries, the detection device comprises a power supply, an indication assembly, a discharge load resistor, a control assembly and a signal acquisition assembly, the indication assembly is connected with the power supply, the discharge load resistor is connected with the battery module, the control assembly is connected with the control assembly, and the signal acquisition assembly is connected with the control assembly. The control assembly is connected with the power supply, the control assembly is used for controlling the indication assembly to be powered on or powered off and controlling the battery module to discharge, and the signal acquisition assembly is connected with the battery module in parallel and is used for acquiring a voltage signal of the battery module.
Description
technical field [0001] The invention belongs to the technical field of battery detection, and in particular relates to a battery module welding quality detection device. Background technique [0002] Lithium-ion battery cells are usually combined in series and parallel to form a module, and the module group is formed by welding the pole pieces, so the welding quality directly determines the electrical performance and safety performance of the battery pack. If the electrode piece cannot be well combined with the battery pole during the process, it will cause false welding. This welding will increase the contact resistance of the electrode piece, resulting in poor consistency of the battery system during charging and discharging, thus affecting the battery pack system. capacity and energy, and even affect the cycle life and safety performance of the battery pack. [0003] The existing welding methods for detecting battery modules mainly include plasma signal detection method,...
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IPC IPC(8): G01R31/385
CPCG01R31/385
Inventor 童仁旺解晓辉刘文帅
Owner 杭州捷能科技有限公司