Battery pack electric control integrated structure

Abstract

The utility model belongs to the field of batteries, and particularly relates to a battery pack electric control integrated structure. Comprising a BDU shell, a PCB circuit concentration board and a PCB protection board, the BDU shell comprises an upper shell body and a lower shell body, the upper surface of the lower shell body is provided with a large-current fuse, a charging and discharging relay, a shunt and a resistor, the upper shell body is fixed to the upper portion of the lower shell body, the PCB circuit concentration board is connected to the lower portion of the lower shell body, and the PCB protection board is connected to the PCB protection board. An auxiliary relay, a first relay interface, a BDU communication interface, an auxiliary external interface, a shunt interface, a second relay interface, a plug-in fuse and a resistor interface are integrated on the PCB circuit concentration board, and the PCB protection board is fixedly connected to the bottom of the PCB circuit concentration board. According to the utility model, all electric control elements are integrated, so that the space utilization rate can be improved, the product size can be reduced, most lithium batteries can be compatible, and large-scale production can be realized.

Description

Technical Field

[0001] The utility model belongs to the field of batteries, and in particular relates to an electronic control integrated structure of a battery pack. Background Art

[0002] Lithium batteries generally include a battery pack body and an electronic control structure. Most existing lithium battery electronic control structures are designed together with the battery pack body inside the box. Some electronic control structures are integrated into the electronic control box and placed outside the box. However, both methods have the following defects: (1) Due to the limited installation method of components, it is impossible to improve space utilization. The product needs to reserve more space for the electronic control system to meet the electronic control layout, which makes the product size too large; (2) During the design, each battery pack has different requirements for the electronic control part. There is no fixed template, which makes it difficult to unify some components, with diverse styles, high requirements for production process, and difficult to control quality; (3) There are many styles and sizes of lithium battery component control boards, which makes it difficult to form large-scale batch production. It takes a lot of assembly time and is costly. Therefore, it is urgent to design a battery pack electronic control integrated structure. Utility Model Content

[0003] In response to the problems existing in the above-mentioned prior art, the present invention discloses a battery pack electronic control integrated structure, and specifically discloses the following technical solutions:

[0004] A battery pack electronic control integrated structure includes a BDU shell, a PCB circuit hub and a PCB protection board. The BDU shell includes an upper shell and a lower shell. A high-current fuse, a charge and discharge relay, a shunt and a resistor are fixedly installed on the upper surface of the lower shell. The upper shell fixed cover is arranged on the upper part of the lower shell. The PCB circuit hub is fixedly connected to the lower part of the lower shell. An auxiliary relay, a first relay interface, a BDU communication interface, an auxiliary external interface, a shunt interface, a second relay interface, a plug-in fuse and a resistor interface are integrated on the PCB circuit hub. The lower part of the lower shell is provided with a receiving groove for accommodating the auxiliary relay. The PCB protection board is fixedly connected to the bottom of the PCB circuit hub.

[0005] Furthermore, the high-current fuse is connected to the charge-discharge relay via a hard copper busbar.

[0006] Furthermore, the charging and discharging relay is electrically connected to the first relay interface and the second relay interface respectively.

[0007] Furthermore, the auxiliary relay is electrically connected to the BDU communication interface, the auxiliary external interface, the resistance interface and the plug-in fuse through copper wires pre-buried inside the PCB circuit assembly board, and the auxiliary relay is electrically connected to the charging and discharging relay through a copper busbar.

[0008] Furthermore, the BDU communication interface is electrically connected to the first relay interface, the shunt interface and the second relay interface respectively through copper wires pre-buried inside the PCB circuit assembly board.

[0009] Furthermore, the shunt is electrically connected to the shunt interface, and the resistor is electrically connected to the resistor interface.

[0010] Furthermore, the auxiliary relay, the first relay interface, the BDU communication interface, the auxiliary external interface, the shunt interface, the second relay interface, the plug-in fuse and the resistor interface are respectively soldered on the PCB circuit assembly board.

[0011] Furthermore, the high-current fuse, the charge-discharge relay, the shunt and the resistor are all fixed to the lower shell by screws, and the lower shell and the PCB circuit assembly board, as well as the PCB circuit assembly board and the PCB protection board are all connected by screws.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In terms of structural design, the height of the vertical space of the product is utilized to stack some components to increase space utilization and effectively reduce the space occupied by components;

[0014] 2. The structure is modularized and compatible with most lithium batteries on the market, which reduces design costs and can be processed and stocked individually on a large scale and in batches;

[0015] 3. Standardized assembly is convenient, which improves assembly efficiency, facilitates process control, and is beneficial to improving product quality and high production efficiency;

[0016] 4. Some electrical components are integrated on the PCB board, eliminating the need for electrical wiring harnesses, improving product appearance and avoiding the risk of poor wiring harness connection;

[0017] 5. Unified process makes product quality easy to control;

[0018] 6. Modular installation method is adopted to facilitate after-sales maintenance or direct replacement of the module's BDU and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the disassembled structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the disassembled structure from another perspective of the utility model.

[0021] 1-Upper housing, 2-Lower housing, 3-PCB circuit board, 4-PCB protection board, 5-High current fuse, 6-Charge and discharge relay, 7-Auxiliary relay, 8-First relay interface, 9-BDU communication interface, 10-Auxiliary external interface, 11-Shunter interface, 12-Shunter, 13-Second relay interface, 14-Plug-in fuse, 15-Resistor interface, 16-Resistor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 1-2 , a battery pack electronic control integrated structure, including a BDU shell, a PCB circuit hub 3 and a PCB protection board 4, the BDU shell includes an upper shell 1 and a lower shell 2, the upper surface of the lower shell 2 is fixedly installed with a large current fuse 5, a charge and discharge relay 6, a shunt 12 and a resistor 16, the upper shell 1 fixed cover is arranged on the upper part of the lower shell 2, the PCB circuit hub 3 is fixedly connected to the lower part of the lower shell 2, the PCB circuit hub 3 is integrated with an auxiliary relay 7, a first relay interface 8, a BDU communication interface 9, an auxiliary external interface 10, a shunt interface 11, a second relay interface 13, a plug-in fuse 14 and a resistor interface 15, the lower part of the lower shell 2 is provided with a receiving groove for accommodating the auxiliary relay 7, and the PCB protection board 4 is fixedly connected to the bottom of the PCB circuit hub 3.

[0024] In this embodiment, the upper shell 1 and the lower shell 2 are both made of PC+10% GF material. The upper shell 1 mainly serves to protect internal components. The lower shell 2 mainly serves to install high-current fuses 5, charge and discharge relays 6, shunts 12 and resistors 16 by screws. It also serves to fix the PCB circuit hub 3 and the bottom PCB protection board 4 by screws. The lower part of the lower shell 2 is provided with a receiving groove for accommodating the auxiliary relay 7, so that some components can be stacked in the longitudinal space to improve space utilization, reduce product size, and make it compatible with most products.

[0025] In this embodiment, the auxiliary relay 7, the first relay interface 8, the BDU communication interface 9, the auxiliary external interface 10, the shunt interface 11, the second relay interface 13, the blade fuse 14, and the resistor interface 15 are all integrated on the PCB circuit wiring board 3. Compared with the traditional method of connecting different components through multiple wire harnesses, the PCB circuit wiring board 3 does not require extra wires, so it occupies less space and is easier to install.

[0026] In this embodiment, the high-current fuse 5 is connected to the charge and discharge relay 6 through a hard copper bar, which plays a role in overcurrent protection.

[0027] In this embodiment, the charge and discharge relay 6 is electrically connected to the first relay interface 8 and the second relay interface 13 respectively. In actual applications, different relay interfaces can be selected for connection according to needs, so as to meet the requirements for different voltages and capacities of lithium batteries.

[0028] In this embodiment, the auxiliary relay 7 is electrically connected to the BDU communication interface 9, the auxiliary external interface 10, the resistor interface 15, and the blade fuse 14 respectively through copper wires buried inside the PCB circuit wiring board 3. The auxiliary relay 7 is electrically connected to the charge and discharge relay 6 through a copper bar. The auxiliary relay 7 has functions such as pre-charging, self-locking, and heating, and can meet different usage requirements.

[0029] In this embodiment, the BDU communication interface 9 is electrically connected to the first relay interface 8, the shunt interface 11, and the second relay interface 13 respectively through copper wires buried inside the PCB circuit wiring board 3. After the BDU communication interface 9 is connected to the external BMS, communication with the BMS can be achieved.

[0030] In this embodiment, the shunt 12 is electrically connected to the shunt interface 11, and the resistor 16 is electrically connected to the resistor interface 15.

[0031] In this embodiment, the auxiliary relay 7, the first relay interface 8, the BDU communication interface 9, the auxiliary external interface 10, the shunt interface 11, the second relay interface 13, the blade fuse 14, and the resistor interface 15 are respectively soldered on the PCB circuit wiring board 3.

[0032] In this embodiment, the high-current fuse 5, the charge and discharge relay 6, the shunt 12, and the resistor 16 are all fixed on the lower housing 2 by screws. The lower housing 2 and the PCB circuit wiring board 3, and the PCB circuit wiring board 3 and the PCB protection board 4 are all connected by screws, which is convenient for installation and disassembly.

[0033] In this embodiment, the PCB protection board 4 is made of an epoxy resin board FR-4, and its main function is to protect the PCB circuit wiring board 3 and prevent it from directly contacting the box body.

[0034] The present utility model mainly realizes the integration of the electric control system. The traditional electric control components (relays, shunts, fuses, etc.) are integrated into a replaceable integrated unit. Structurally, the internal components are stacked, and the utilization rate of the internal space is increased without changing the height, thereby reducing the volume of the electric control part. The electric control integrated unit can be pre-assembled, improving the production and installation efficiency of the finished product and reducing the production cycle. Canceling the internal electrical wiring harness and using a high-integration PCB circuit wiring board to replace the traditional wiring harness materials can avoid product problems caused by poor wiring harness connections, facilitate after-sales maintenance and replacement, and have good applicability and versatility.

[0035] The above are only the preferred embodiments of the present utility model, and do not impose any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A battery pack electronic control integrated structure, characterized in that It includes a BDU housing, a PCB circuit wiring board, and a PCB protection board. The BDU housing includes an upper housing and a lower housing. A high-current fuse, a charge and discharge relay, a shunt, and a resistor are fixedly installed on the upper surface of the lower housing. The upper housing is fixedly sleeved on the upper part of the lower housing. The PCB circuit wiring board is fixedly connected to the lower part of the lower housing. An auxiliary relay, a first relay interface, a BDU communication interface, an auxiliary external interface, a shunt interface, a second relay interface, a cartridge fuse, and a resistor interface are integrally arranged on the PCB circuit wiring board. A receiving groove for receiving the auxiliary relay is arranged at the lower part of the lower housing. The PCB protection board is fixedly connected to the bottom of the PCB circuit wiring board.

2. The electronic control integrated structure of a battery pack according to claim 1, wherein, The high-current fuse is connected to the charge and discharge relay through a rigid copper bar.

3. An electronic control integrated structure of a battery pack according to claim 2, characterized in that The charge and discharge relay is electrically connected to the first relay interface and the second relay interface respectively.

4. A battery pack electronic control integrated structure according to claim 3, characterized in that The auxiliary relay is electrically connected to the BDU communication interface, the auxiliary external interface, the resistor interface, and the cartridge fuse respectively through copper wires embedded inside the PCB circuit wiring board. The auxiliary relay is electrically connected to the charge and discharge relay through a copper bar.

5. The battery pack electronic control integrated structure according to claim 4, characterized in that, The BDU communication interface is electrically connected to the first relay interface, the shunt interface, and the second relay interface respectively through copper wires embedded inside the PCB circuit wiring board.

6. The electronic control integrated structure of a battery pack according to claim 5, characterized in that The shunt is electrically connected to the shunt interface, and the resistor is electrically connected to the resistor interface.

7. A battery pack electronic control integrated structure according to claim 1, characterized in that, The auxiliary relay, the first relay interface, the BDU communication interface, the auxiliary external interface, the shunt interface, the second relay interface, the cartridge fuse, and the resistor interface are respectively soldered on the PCB circuit wiring board.

8. A battery pack electronic control integrated structure according to claim 1, characterized in that, The high-current fuse, the charge and discharge relay, the shunt, and the resistor are all fixed on the lower housing by screws. The lower housing and the PCB circuit wiring board, and the PCB circuit wiring board and the PCB protection board are all connected by screws.

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