Integrated busbar with cell pressure release valve detection function

Abstract

The utility model discloses an integrated busbar with a cell pressure release valve detection function. The integrated busbar comprises an insulating bottom plate, a circuit board, a conductive part and a plurality of detection parts, a plurality of through holes are formed in the left end and the right end of the insulating bottom plate; the through holes correspond to the battery cell poles in position; the circuit board is arranged above the insulating bottom plate, a plurality of connecting structures are arranged on the left side and the right side of the circuit board, a plurality of mounting holes are correspondingly formed in the middles of the insulating bottom plate and the circuit board respectively, and the mounting holes correspond to the safety valves of the battery cells in position; the conductive part is arranged at the bottom of the connecting structure, penetrates through the through hole and is connected with the pole of the battery cell, and the conductive part is fixedly connected with the connecting structure; the detection part corresponds to the mounting hole; each detection part comprises a core body arranged on the circuit board and a sensor connected with the core body, the detection parts are of a semi-split structure, and the sensors can penetrate through the mounting holes to cover the battery cell safety valves. Through the arrangement, the integrated busbar is lower in cost and higher in reliability.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to an integrated busbar with a cell pressure relief valve detection function. Background Technology

[0002] With the widespread application of lithium batteries in energy storage and new energy vehicles, the safety requirements for battery systems are increasing. As a critical passive protection device for battery cells, the pressure relief valve releases gas when internal pressure abnormally rises, preventing battery explosions. Therefore, real-time monitoring of the pressure relief valve's status is crucial for preventing thermal runaway events.

[0003] Currently, most integrated busbars in battery modules only have temperature and voltage detection functions, lacking monitoring of cell pressure relief valves. Solutions that do include this function suffer from high cost, complex structure, difficulty in maintenance, easy sensor damage, and installation difficulties. Furthermore, existing circuit board integration methods cannot withstand the high temperature and high pressure environment during pressure relief, making sensors prone to damage and failure, and exhibiting poor adaptability to cell size tolerances, easily leading to detection errors. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an integrated busbar with a cell pressure relief valve detection function. This integrated busbar is low in cost, highly reliable, and easily maintainable.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated busbar with a cell pressure relief valve detection function includes: an insulating base plate, a circuit board, conductive components, and several detection components; the insulating base plate has several through holes along its length at both ends, the positions of which correspond to the positions of multiple cell terminals; the circuit board is disposed above the insulating base plate, and multiple connecting structures are disposed on its left and right sides along its length; the insulating base plate and the circuit board each have several mounting holes in their middle sections along their own length, the mounting holes corresponding to the positions of multiple cell safety valves; the conductive components are disposed at the bottom of the connecting structures and pass through the through holes to connect to the cell terminals, and the conductive components are fixedly connected to the connecting structures; the detection components are disposed corresponding to the mounting holes; each detection component includes a lead-out portion mounted on the circuit board and a sensor connected to the lead-out portion, the detection component has a semi-split structure, and the sensor can pass through the mounting holes to cover the cell safety valve.

[0007] Furthermore, the conductive component is an aluminum-palladium structure, and it is positioned by a hot riveting post and fixed by being melted into a mushroom head shape by a hot riveting gun.

[0008] Furthermore, the connecting structure is provided with nickel sheets, which are fixed to the conductive components by welding.

[0009] Furthermore, the core is soldered to the circuit board to form an electrical connection.

[0010] Furthermore, the sensor comprises, from top to bottom, an encapsulation layer, an electrode layer, an insulating layer, and an adhesive layer. The adhesive layer is used to connect the safety valve of the battery cell, and the encapsulation layer and the insulating layer are bonded together to form a sealed protective structure.

[0011] Furthermore, the electrode layer includes a first conductor, a second conductor, and two leads; the first conductor and the second conductor are respectively connected to a lead through an S-shaped or I-shaped connection path; the lead is connected to the lead-out section.

[0012] Furthermore, the first and second conductors along the electrode layer on the insulating layer are cut out in a strip pattern, and the conductor composite material on the insulating layer is coated according to the cut-out portion.

[0013] Furthermore, a protective film is provided at the bottom of the adhesive layer. When installing the sensor, the protective film can be torn off to attach the adhesive layer to the safety valve of the battery cell.

[0014] The aforementioned integrated busbar with cell pressure relief valve detection function introduces a conductive and detection structure with through holes and mounting holes between the insulating base plate and the circuit board. Combined with the semi-split sensor assembly structure, it realizes simultaneous detection of cell terminal connection and safety valve status. This solves the problem of traditional CCS structures that are difficult to balance pressure relief valve detection, sensor stability, structural cost and installation flexibility, effectively improving the safety and maintenance convenience of module operation. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the integrated busbar provided by this utility model;

[0016] Figure 2 This is an exploded view of the integrated busbar provided by this utility model;

[0017] Figure 3 This is an exploded view of the sensor provided by this utility model;

[0018] Figure 4 This is a schematic diagram of the first embodiment of the electrode layer provided by this utility model;

[0019] Figure 5 This is a schematic diagram of a second embodiment of the electrode layer provided by this utility model. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In addition, to clearly illustrate the technical solution of this application, the following are also defined: Figure 1 The top, bottom, left, right, front, and back sides are shown.

[0022] like Figures 1 to 5 As shown, this application provides an integrated busbar with a cell pressure relief valve detection function, including: an insulating base plate 1, a circuit board 2, a conductive component 3, and several detection components 4.

[0023] Specifically, the insulating base plate 1 has several through holes 11 along its length at both ends, with the positions of the through holes 11 corresponding to the positions of multiple battery cell terminals. The circuit board 2 is positioned above the insulating base plate 1, and multiple connecting structures 21 are provided on its left and right sides along its length. The insulating base plate 1 and the circuit board 2 each have several mounting holes 22 in their middle sections along their own length, with the mounting holes 22 corresponding to the positions of the safety valves of multiple battery cells. A conductive component 3 is positioned at the bottom of the connecting structure 21 and passes through the through holes 11 to connect to the battery cell terminals. The conductive component 3 is fixedly connected to the connecting structure 21. Detection components 4 are provided corresponding to the mounting holes 22. Each detection component 4 includes a lead-out portion 41 mounted on the circuit board 2 and a sensor 42 connected to the lead-out portion 41. The detection component 4 has a semi-split structure, and the sensor 42 can pass through the mounting holes 22 to cover the battery cell safety valve.

[0024] Through the above settings, accurate monitoring of the cell pressure relief valve status is achieved, effectively improving the battery pack's safety protection level. Meanwhile, the detection component 4 is a semi-split type, facilitating installation and replacement, and reducing maintenance costs. Furthermore, the integrated busbar has a compact overall structure, effectively overcoming problems such as the easy damage to sensor 42 and complex installation in existing technologies, demonstrating good engineering adaptability and mass production feasibility.

[0025] More specifically, conductive component 3 is an aluminum-palladium structure. It is positioned using hot-riveted posts and fixed by being melted into a mushroom-shaped form with a hot riveting gun. The use of an aluminum-palladium structure not only reduces material costs but also enhances the conductivity and corrosion resistance of the integrated busbar. The mechanical locking method of the hot-riveted posts avoids the use of screws or adhesives, improving production efficiency and overall structural robustness. The mushroom-shaped riveting form has excellent tensile strength, maintaining a stable connection even under pressure fluctuations or vibrations in the battery cell, reducing contact resistance fluctuations, and improving system safety and reliability.

[0026] Furthermore, a nickel sheet 23 is provided on the connection structure 21, and the nickel sheet 23 is fixed to the conductive component 3 by welding. The introduction of the nickel sheet 23 structure improves the solderability and fatigue resistance of the entire circuit connection system, making the connection more reliable and easier for mass assembly.

[0027] Furthermore, the lead-out part 41 is soldered to the circuit board 2 to form an electrical connection, which can significantly improve the electrical reliability and vibration resistance of the connection and avoid poor contact caused by plugging or unplugging or loosening of the connector.

[0028] like Figure 2 As shown, the sensor 42 comprises, from top to bottom, an encapsulation layer 421, an electrode layer 422, an insulating layer 423, and an adhesive layer 424. The adhesive layer 424 is used to connect the safety valve of the battery cell. The encapsulation layer 421 and the insulating layer 423 are bonded together to form a sealed protective structure. The encapsulation layer 421 is the outermost layer and has excellent temperature resistance, pressure resistance, and corrosion resistance, protecting the internal structure from environmental influences. The electrode layer 422 houses the detection circuit and conductive paths. The insulating layer 423, located between the electrode layer 422 and the adhesive layer 424, provides electrical insulation and structural support. The adhesive layer 424, located at the bottom, securely bonds the sensor 42 to the safety valve position of the battery cell. This multi-layered sensor 42 exhibits high structural integration and environmental adaptability.

[0029] like Figure 3 As shown, the first and second wires 4221 along the electrode layer 422 on the insulating layer 423 are perforated in a dotted pattern. The insulating layer 423 is coated with a wire composite material along the perforated areas, which can improve the response speed to leakage anomalies in the safety valve. It should be understood that the dotted perforation pattern can be designed as stripes, curves, grids, etc., depending on the wire shape, to adapt to different electrode paths and sensing requirements.

[0030] like Figure 4 and Figure 5 As shown, the electrode layer 422 includes a first conductor 4221, a second conductor 4222, and two lead-out wires 4223. The first conductor 4221 and the second conductor 4222 are each connected to a lead-out wire 4223 via an S-shaped or I-shaped connection path. This connection path effectively absorbs stress caused by minor mechanical deformation, extending service life. The lead-out wires 4223 are connected to the lead-out section 41 to transmit safety valve detection information.

[0031] Furthermore, a protective adhesive film is provided at the bottom of the adhesive layer 424. When installing the sensor 42, the protective adhesive film can be torn open to adhere the adhesive layer 424 to the safety valve of the battery cell. The protective adhesive film effectively extends the shelf life and functional retention time of the adhesive layer 424, avoiding degradation of adhesion or contamination caused by exposure.

[0032] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. An integrated busbar having a function of detecting a relief valve of a battery cell, characterized by, include: An insulating base plate (1) is provided with several through holes (11) along its length at both ends of the insulating base plate (1), and the positions of the through holes (11) correspond to the positions of multiple battery cell terminals; Circuit board (2), the circuit board (2) is disposed above the insulating base plate (1), the left and right sides of the circuit board (2) are provided with multiple connecting structures (21) along its length direction, the insulating base plate (1) and the circuit board (2) are respectively provided with multiple mounting holes (22) in the middle along their own length direction, the mounting holes (22) correspond to the positions of the safety valves of multiple battery cells; Conductive component (3) is disposed at the bottom of the connection structure (21) and passes through the through hole (11) to connect with the electrode post of the battery cell. The conductive component (3) is fixedly connected to the connection structure (21). Several detection components (4) are provided, each detection component (4) being provided with respect to the mounting hole (22); each detection component (4) includes a lead-out portion (41) mounted on the circuit board (2) and a sensor (42) connected to the lead-out portion (41). The detection component (4) is a semi-split structure, and the sensor (42) can pass through the mounting hole (22) and cover the battery cell safety valve.

2. The integrated busbar with the battery cell pressure relief valve detection function according to claim 1, characterized in that, The conductive component (3) is an aluminum-palladium structure. The conductive component (3) is positioned in the form of a hot riveting post and fixed by melting it into a mushroom head shape with a hot riveting gun.

3. The integrated busbar with battery cell pressure relief valve detection function according to claim 2, characterized in that, The connecting structure (21) is provided with a nickel sheet (23), which is fixed to the conductive component (3) by welding.

4. The integrated busbar with battery cell pressure relief valve detection function according to claim 1, characterized in that, The lead-out portion (41) is welded to the circuit board (2) to form an electrical connection.

5. The integrated busbar with battery cell pressure relief valve detection function according to claim 1, characterized in that, The sensor (42) includes, from top to bottom, an encapsulation layer (421), an electrode layer (422), an insulating layer (423), and an adhesive layer (424). The adhesive layer (424) is used to connect the safety valve of the battery cell. The encapsulation layer (421) and the insulating layer (423) are bonded together to form a sealed protective structure.

6. The integrated busbar with battery cell pressure relief valve detection function according to claim 5, characterized in that, The electrode layer (422) includes a first conductor (4221), a second conductor (4222), and two lead wires (4223); the first conductor (4221) and the second conductor (4222) are respectively connected to a lead wire (4223) through an S-shaped or I-shaped connection path; the lead wire (4223) is connected to the lead-out part (41).

7. The integrated busbar with battery cell pressure relief valve detection function according to claim 6, characterized in that, The first conductor (4221) and the second conductor (4222) along the electrode layer (422) on the insulating layer (423) are hollowed out in a strip pattern, and the insulating layer (423) is provided with conductor composite material coated according to the hollowed-out part.

8. The integrated busbar with battery cell pressure relief valve detection function according to claim 5, characterized in that, The adhesive layer (424) has a colloid protective film at the bottom. When installing the sensor (42), the colloid protective film can be torn off to stick the adhesive layer (424) to the safety valve of the battery cell.

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