电池包断路单元 / 电源分配单元用主正回路模块
By integrating the main positive relay, fuse, and precharge circuit components, and using a vertical PCB board layout and a small precharge relay, the problems of complex assembly and large space occupation of the main positive circuit module are solved, achieving lightweighting and miniaturization of the battery pack circuit breaker/power distribution unit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU TIECHENG INFORMATION TECH
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-17
AI Technical Summary
The main positive circuit module of the existing new energy vehicle battery pack circuit breaker/power distribution unit has problems such as complex assembly, large space occupation, and difficulty in miniaturization. In particular, the assembly process of the pre-charge relay and pre-charge resistor is complex and occupies a large space.
The main positive relay, fuse, and precharge circuit assembly are integrated into the same housing. The PCB board is vertically arranged, and small precharge relays and thermistors are used to shorten the copper busbar length. The PCB board is fixed with filler glue to reduce assembly steps and space occupation.
The miniaturization of the main positive circuit module has been achieved, reducing the complexity of the assembly process and the defect rate, reducing the amount of copper busbars used and the space occupied, adapting to the miniaturization requirements of BDU/PDU, and reducing costs and weight.
Smart Images
Figure CN224519925U_ABST
Abstract
Claims
1. A main positive circuit module for a battery pack circuit breaker unit / power distribution unit, comprising a main positive relay, a fuse, characterized in that: It also includes a precharge circuit assembly, the housing having a first inner cavity for accommodating the main positive relay, a second inner cavity for accommodating the precharge circuit assembly, and a third inner cavity for accommodating the fuse, the second inner cavity being located above or to the side of the first inner cavity, and the third inner cavity being located to the side of the first and second inner cavities; The precharge circuit assembly includes a PCB board and a precharge circuit circuit with a thermistor and a precharge relay disposed on the PCB board. The two stationary contacts of the main positive relay extend into the second inner cavity, and the two stationary contacts are respectively connected to the positive terminal and the negative terminal of the precharge circuit circuit through a first copper busbar. The PCB board is arranged vertically, and the first copper busbar is arranged horizontally. One of the two stationary contacts extends to the outside of the housing and forms a first external terminal for connecting to the battery terminal. One terminal of the fuse is electrically connected to the other stationary contact of the two stationary contacts. The other terminal of the fuse extends to the outside of the housing and forms a second external terminal for connecting to the electronic control terminal. The first external terminal and the second external terminal are located above the second inner cavity and the third inner cavity, respectively.
2. The master positive circuit module for battery pack circuit breaker unit / power distribution unit of claim 1, wherein: Two first copper busbars are arranged side by side, and the end of the first copper busbar away from the stationary contact is provided with a power-connecting protrusion. The PCB board is provided with a positioning groove that mates with the power-connecting protrusion. The power-connecting protrusion is welded and fixed to the positioning groove and electrically connected to the pre-charge circuit.
3. The master positive circuit module for a battery pack circuit breaking unit / power distribution unit according to claim 1 or 2, characterized in that: A filler adhesive is provided between the PCB board of the second inner cavity and the inner wall of the housing.
4. The master positive circuit module for battery pack circuit breaker unit / power distribution unit of claim 1, wherein: The extension direction of the stationary contact is parallel to the extension direction of the second external terminal. The stationary contact, which is the first external terminal, is farther away from the second external terminal than the other stationary contact. The top of the housing is provided with an isolation plate located between the two stationary contacts.
5. The master positive circuit module for battery pack circuit breaker unit / power distribution unit of claim 2, wherein: A second copper busbar is fixed at each end of the fuse. The second copper busbar includes a vertically arranged vertical part that is electrically connected to the fuse and a horizontally arranged horizontal part. The horizontal part is connected to the upper end of the vertical part. One horizontal part of the second copper busbar is connected to a stationary contact, and the other horizontal part of the second copper busbar is connected to a second external terminal.