Integrated busbar structure with fuse and battery pack

Abstract

The utility model discloses an integrated busbar structure with a fuse and a battery pack. The integrated busbar structure with the fuse comprises an integrated busbar, a plurality of aluminum bars connected with the integrated busbar, a metal substrate type circuit board with one end electrically connected with the aluminum bars, and a transmission part electrically connected with the other end of the metal substrate type circuit board, wherein the metal substrate type circuit board comprises a first bonding pad and a second bonding pad, the first bonding pad is connected with the aluminum bar 2, the second bonding pad is connected with the transmission part, and the first bonding pad is connected with the second bonding pad through a safety part. The beneficial effects of the utility model lie in that: 1, an electronic wire harness, a flat cable or an FFC is used as a base material to transmit electric signals, so that the material cost is reduced; 2, full-automatic unmanned processing can be adopted for welding the metal substrate and the aluminum bar, so that the manufacturing time cost is reduced; and 3, the fuse is integrated on the metal substrate type circuit, so that the whole CCS has a safety function, and safety guarantee is provided when the battery pack is subjected to thermal runaway.

Description

TECHNICAL FIELD

[0001] The application relates to the electronic technical field, in particular to a fuse-integrated busbar structure and a battery pack. BACKGROUND

[0002] At present, new energy vehicles are developing rapidly, and power batteries are necessarily used in new energy vehicles, and the safety of the power batteries is an important issue. In the manufacturing field of cell contact systems (CCS) of new energy battery packs, the CCSs using wire harnesses, flat cables or FFCs as substrates do not have a fuse function. When the CCS products do not have a fuse function, short circuit or overcurrent occurs in the products, and because the wire harnesses do not have a fuse, the wire harnesses cannot be cut off in time for safety protection. The CCS products without a fuse function are limited in application and are mainly used in commercial vehicles or energy storage products with low requirements for overcurrent and short circuit.

[0003] Therefore, it is urgent to develop a fuse-integrated busbar structure integrated with a fuse function and a battery pack. CONTENT OF THE UTILITY MODEL

[0004] The application aims to solve the above technical problems.

[0005] Therefore, the first purpose of the application is to provide a fuse-integrated busbar structure integrated with a fuse function.

[0006] The second purpose of the application is to provide a battery pack with the fuse-integrated busbar structure.

[0007] To achieve the above purpose, the application discloses a fuse-integrated busbar structure, which comprises an integrated busbar 1, a plurality of aluminum bars 2 connected with the integrated busbar 1, a metal substrate type circuit board 3 having one end electrically connected with the aluminum bar 2, and a transmission part 4 electrically connected with the other end of the metal substrate type circuit board 3; wherein the metal substrate type circuit board 3 comprises a first solder pad 31 connected with the aluminum bar 2 and a second solder pad 32 connected with the transmission part 4, and the first solder pad 31 and the second solder pad 32 are connected through a fuse part 33.

[0008] In addition, the fuse-integrated busbar structure according to the above technical solution of the application can also have the following additional technical features:

[0009] Optionally, the transmission part 4 is one of an electronic wire harness, a flat cable or a flexible flat cable.

[0010] Optionally, the fuse part 33 is a fuse or an etched thin line.

[0011] Optionally, the solder pad position of the first solder pad 31 is externally provided with a glue protection layer.

[0012] Optionally, the metal substrate type circuit board 3 further comprises a positioning hole 34.

[0013] To achieve the above object, the second aspect of the present application provides a battery pack with an integrated busbar structure with fuse, comprising the integrated busbar structure with fuse as provided in the first aspect of the present application.

[0014] The present application has the following advantages: 1. Using electronic wire harness, flat cable or FFC as base material to transmit electrical signals, which reduces the material cost; 2. The welding of the metal substrate type circuit board and the aluminum busbar can be fully automated and unmanned, which reduces the manufacturing time cost; 3. Integrating the fuse into the metal substrate type circuit board, so that the entire CCS has a fuse function, which can effectively cut off the current and the transmission of electrical signals when the battery pack is in thermal runaway, short circuit or overcurrent, thereby providing safety protection. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structure diagram of an integrated busbar structure with fuse provided by an embodiment of the present application;

[0016] Fig. 2 is a structure diagram of a metal substrate type circuit board provided by an embodiment of the present application;

[0017] Fig. 3 is a structure diagram of a metal substrate type circuit board provided by another embodiment of the present application.

[0018] REFERENCE NUMERALS:

[0019] 1-integrated busbar, 2-aluminum busbar, 3-metal substrate type circuit board, 31-first solder pad, 32-second solder pad, 33-fuse part, 34-positioning hole, 4-transmission part. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar numerals represent the same or similar elements or parts / components having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0021] The integrated busbar structure with fuse of the embodiments of the present application will be described below in combination with the accompanying drawings.

[0022] Fig. 1 is a structure diagram of an integrated busbar structure with fuse provided by an embodiment of the present application; Fig. 2 is a structure diagram of a metal substrate type circuit board provided by an embodiment of the present application; Fig. 3is a structural schematic diagram of a metal substrate type circuit board provided by another embodiment of the present application, as shown in the figure: Figs. 1-3 The integrated busbar structure with a fuse includes an integrated busbar 1, a plurality of aluminum bars 2 connected to the integrated busbar 1, a metal substrate type circuit board 3 having one end electrically connected to the aluminum bar 2, and a transmission part 4 electrically connected to the other end of the metal substrate type circuit board 3. The metal substrate type circuit board 3 includes a first solder pad 31 connected to the aluminum bar 2 and a second solder pad 32 connected to the transmission part 4, and the first solder pad 31 and the second solder pad 32 are connected by a fuse part 33.

[0023] Specifically, the transmission part 4 is used for transmitting electrical signals, and the metal substrate type circuit board 3 is used as a carrier for the transmission. The fuse part 33 is integrated on the metal substrate type circuit board 3 to function as a fuse. The transmission line of the electrical signal, the transmission part 4, and the metal substrate type circuit board 3 are soldered, laser welded, or superconducting wave welded, and the metal substrate type circuit board 3 and the aluminum bar 2 are soldered, laser welded, or superconducting wave welded.

[0024] It should be noted that, as shown in the figure, Figs. 2-3 The conductive layer and the non-metal layer in part of the area of the metal substrate type circuit board 3 can be removed, leaving the metal substrate layer (the gray part in the figure) for easy welding.

[0025] According to the integrated busbar structure with a fuse of the present application, the welding of the metal substrate type circuit board and the aluminum bar can be fully automated and unmanned, reducing the manufacturing labor cost. The fuse is integrated on the metal substrate type circuit board to provide the entire CCS with a fuse function. When the battery pack is in thermal runaway, short circuit, or overcurrent, the current can be effectively cut off in time, the transmission of electrical signals is provided, and safety is ensured.

[0026] According to an embodiment of the present application, the transmission part 4 is one of an electronic wire harness, a flat cable, or a flexible flat cable.

[0027] Specifically, the transmission part 4 is used for transmitting electrical signals, and currently, electronic wire harnesses, flat cables, or flexible flat cables (FFC) can be used as conductor materials in battery packs. Batch production or modular production of transmission media can effectively reduce the overall production cost.

[0028] According to an embodiment of the present application, the fuse part 33 is a fuse or an etched fine line.

[0029] Specifically, the metal substrate type circuit board 3 can use an etched fine line as a fuse to function as a fuse. This setting can manufacture the fuse at the same time as the production of the metal substrate type circuit board, improving production efficiency and reducing cost. The fuse can also be welded.

[0030] According to one embodiment of the present application, the soldering position of the first soldering pad 31 is externally provided with a glue protection layer.

[0031] Specifically, the first soldering pad 31 is soldered, laser welded or superconducting wave welded, and in order to prevent the soldering pad from falling off due to external force such as vibration, glue is applied to form a protection layer, thereby ensuring stable and reliable connection.

[0032] According to one embodiment of the present application, the metal substrate type circuit board 3 further comprises a positioning hole 34.

[0033] Specifically, the positioning hole is processed on the metal substrate to facilitate positioning during product assembly processing.

[0034] According to one embodiment of the present application, the battery pack with the integrated fuse busbar structure uses electronic wire harness, flat cable or FFC as the base material to transmit electrical signals, thereby reducing the material cost; the welding of the metal substrate type circuit board and the aluminum busbar can be automatically processed without human intervention, thereby reducing the manufacturing time cost; the fuse is integrated on the metal substrate type circuit board, so that the entire CCS has the function of fuse, and when the battery pack is in thermal runaway, short circuit or overcurrent, the current and the transmission of electrical signals can be effectively cut off in time, thereby providing safety protection.

[0035] The above embodiments are the preferred implementation schemes of the present application, and in addition thereto, the present application can also be implemented in other ways, and any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.

Claims

1. An integrated busbar structure with safety features, characterized in that, include: An integrated busbar (1), several aluminum bars (2) connected to the integrated busbar (1), a metal substrate type circuit board (3) with one end electrically connected to the aluminum bar (2), and a transmission unit (4) electrically connected to the other end of the metal substrate type circuit board (3). The metal substrate type circuit board (3) includes a first pad (31) connected to the aluminum bar (2) and a second pad (32) connected to the transmission unit (4). The first pad (31) and the second pad (32) are connected by a safety unit (33). The transmission unit (4) is one of an electronic wire harness, a ribbon cable, or a flexible flat cable; The safety part (33) is a fuse or an etched fine line; The metal substrate type circuit board (3) also includes positioning holes (34).

2. The integrated busbar structure with safety features according to claim 1, characterized in that: The solder joint of the first solder pad (31) is provided with an adhesive protective layer.

3. A battery pack, characterized in that: Including an integrated busbar structure with insurance as described in any one of claims 1-2.

Images