Power battery pack

Abstract

The utility model relates to the technical field of battery packs, and particularly discloses a power battery pack. The battery pack comprises a battery module, a CCS assembly, structural adhesive and a plurality of fireproof insulating plates, the battery module comprises a plurality of power cells, the CCS assembly comprises a sampling circuit board, a protective layer and a plurality of aluminum bars, the aluminum bars are connected with the sampling circuit board, the sampling circuit board and the protective layer are arranged in a stacked mode, a plurality of installation areas are arranged on the protective layer, the number of the installation areas is the same as that of the aluminum bars, and the fireproof insulating plates are arranged in the installation areas. Each aluminum bar is arranged in one mounting area, the battery cell poles of two adjacent power battery cells are connected through one aluminum bar, the plurality of fireproof insulating plates cover all the mounting areas, and the structural adhesive is filled in gaps between the aluminum bars and the fireproof insulating plates. According to the battery pack, by simplifying the specific structure, the stability is improved on the premise of meeting the integrity, so that the production takt is improved, the process steps are reduced, a module upper cover does not need to be arranged, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a power battery pack. Background Art

[0002] Lithium-ion power batteries offer advantages such as high voltage, high energy, compact size, light weight, and a wide operating temperature range. Lithium-ion battery packs are widely used in various fields, particularly in electric vehicles. With the development of new energy vehicles, battery pack safety has become a focus of public attention, and addressing thermal runaway issues is becoming increasingly pressing.

[0003] In the existing technology, power battery packs often adopt a design in which a pressure strip is pressed on the shoulder of the battery cell to limit the upward expansion of the battery cell. The CCS (Cells Contact System) fixing plate is then welded to the battery cell using an aluminum bar. Finally, the module cover is pressed on the aluminum bar to provide insulation.

[0004] However, the workflow of first applying structural adhesive, then pressing the pressure strip, then securing the CCS, and finally installing the module cover has the disadvantages of being cumbersome, having a long production cycle, and high production costs. Furthermore, this process also requires a certain amount of additional processing costs. Therefore, there is significant room for improvement in the structural stability of existing power battery packs. Utility Model Content

[0005] The purpose of the present utility model is to provide a power battery pack to simplify the specific structure of the power battery pack, so as to improve the stability while ensuring the integrity of the power battery pack, thereby improving the production cycle, reducing the process steps, and eliminating the need to set a module cover, thereby reducing cost advantages.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A power battery pack includes a battery module, a CCS assembly, structural adhesive and multiple fireproof insulating boards. The battery module includes multiple power cells. The CCS assembly includes a sampling circuit board, a protective layer and multiple aluminum bars. The aluminum bars are connected to the sampling circuit board. The sampling circuit board and the protective layer are stacked. The protective layer is provided with multiple installation areas. The number of the installation areas is the same as the number of the aluminum bars, and each of the aluminum bars is arranged in one installation area. The cell poles of two adjacent power cells are connected by one aluminum bar. Multiple fireproof insulating boards cover all the installation areas, and the structural adhesive fills the gaps between the aluminum bars and the fireproof insulating boards.

[0008] As an optional technical solution for the power battery pack, the installation area is penetrated by a receiving hole, the aluminum bar is sealed and connected to the hole wall of the receiving hole, the fireproof insulating board, the aluminum bar and the hole wall of the receiving hole form a filling cavity, and the filling cavity is filled with structural adhesive.

[0009] As an optional technical solution for the power battery pack, each of the aluminum bars is at least partially located in one of the receiving holes, and the portion of the aluminum bar located in the receiving hole is sealed and connected to the hole wall of the receiving hole.

[0010] As an optional technical solution for the power battery pack, the top of the aluminum bar is sealed to the bottom of the hole wall of the accommodating hole, and the fireproof insulating plate covers the top of the accommodating hole.

[0011] As an optional technical solution for the power battery pack, the bottom of the aluminum bar is connected to the battery cell pole, and the battery cell pole is arranged on the top of the power battery cell.

[0012] As an optional technical solution for the power battery pack, the fireproof insulation board is made of epoxy glass fiber.

[0013] As an optional technical solution for the power battery pack, the thickness of the fireproof insulation board is 1.6 mm to 2.0 mm.

[0014] As an optional technical solution for the power battery pack, the aluminum bar is adhesively connected to the protective layer; or the aluminum bar is welded to the protective layer.

[0015] As an optional technical solution for the power battery pack, at least two battery modules are provided and arranged in parallel in the horizontal direction, and the CCS assembly is fixedly connected to all the battery modules.

[0016] As an optional technical solution for the power battery pack, the fireproof insulation board and the sampling circuit board are spaced apart.

[0017] Beneficial effects of the utility model:

[0018] This power battery pack simplifies its structure by integrating the battery module, CCS assembly, and fireproof insulation board. This design improves stability and structural strength while maintaining the integrity of the battery pack, accelerating production cycle times and reducing process steps. This structure provides efficient energy storage while effectively managing and protecting the battery modules, ensuring the safety and fire resistance of the power battery pack. The sampling circuit board is connected to the aluminum bar and laminated with the protective layer, ensuring a more secure connection and optimizing the overall spatial layout of the power battery pack. The fireproof insulation board provides fire protection and insulation, while also offsetting the expansion force of the power cells during operation and helping to suppress displacement of the power cells at the cell terminals. This allows it to function as a module cover, eliminating the ceramic silicone rubber cover and allowing the fireproof insulation board to serve directly as the cover, reducing costs. The CCS assembly connects and monitors the power cells through the aluminum bar and sampling circuit board, while the structural adhesive ensures a secure and stable connection. These improvements significantly enhance the power battery pack's energy density, safety, fire resistance, and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a power battery pack provided by an embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of a power battery pack provided by an embodiment of the present utility model;

[0021] Figure 3 yes Figure 2 A partial enlarged view of middle A;

[0022] Figure 4 yes Figure 2 A partial enlarged view of B.

[0023] In the picture:

[0024] 100, fireproof insulation board; 200, structural adhesive; 300, CCS assembly; 310, aluminum bar; 320, sampling circuit board; 330, protective layer; 400, battery module; 410, power cell; 411, cell pole. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] like Figures 1 to 4As shown, this embodiment provides a power battery pack, including a battery module 400, a CCS assembly 300, a structural adhesive 200 and a plurality of fireproof insulating boards 100, the battery module 400 includes a plurality of power cells 410, the CCS assembly 300 includes a sampling circuit board 320, a protective layer 330 and a plurality of aluminum bars 310, the aluminum bars 310 are connected to the sampling circuit board 320, the sampling circuit board 320 and the protective layer 330 are stacked, and a plurality of installation areas are provided on the protective layer 330, the number of the installation areas is the same as the number of the aluminum bars 310, and each aluminum bar 310 is provided in an installation area, the cell poles 411 of two adjacent power cells 410 are connected by an aluminum bar 310, a plurality of fireproof insulating boards 100 cover all the installation areas, and the structural adhesive 200 fills the gap between the aluminum bar 310 and the fireproof insulating board 100.

[0030] This power battery pack simplifies its structure by combining a battery module 400, a CCS assembly 300, structural adhesive 200, and a fireproof insulating plate 100. This design improves stability while maintaining the integrity of the power battery pack, enhances structural strength, increases production cycle time, and reduces process steps. This structure provides efficient energy storage while effectively managing and protecting the battery module 400, ensuring the safety and fire resistance of the power battery pack. The sampling circuit board 320 is connected to the aluminum bar 310 and stacked with the protective layer 330, making the connection of the power battery pack more reliable and optimizing the overall spatial layout. The fireproof insulating plate 100 not only provides fire protection and insulation, but also offsets the expansion force of the power cell 410 during operation, helping to suppress the displacement of the power cell 410 at the cell pole 411, thereby serving as the module cover. This eliminates the need for the ceramic silicone rubber upper cover of the original module, allowing the fireproof insulating plate 100 to directly serve as the upper cover, reducing costs. The CCS assembly 300 connects and monitors the power cells 410 through aluminum bars 310 and a sampling circuit board 320, while the structural adhesive 200 ensures the security and stability of the connection. These improvements significantly enhance the power battery pack's energy density, safety, fire resistance, and production efficiency.

[0031] When assembling the above-mentioned power battery pack, the power cells 410 are first stacked, then the aluminum bars 310 are welded to the cell poles 411 to achieve series and parallel connection. Structural adhesive 200 is then applied to the aluminum bars 310, and finally, the structural adhesive 200 is pressed and spread using a fireproof insulation board 100. This assembly method is simple and reliable, easy to operate, and highly efficient.

[0032] In this embodiment, a receiving hole is passed through the installation area, the aluminum bar 310 is sealed and connected to the hole wall of the receiving hole, the fireproof insulation board 100, the aluminum bar 310 and the hole wall of the receiving hole form a filling cavity, and the filling cavity is filled with structural adhesive 200.

[0033] The provision of the accommodating hole achieves the purpose of positioning the aluminum bar 310 with the protective layer 330, reducing the risk of the aluminum bar 310 accidentally detaching from the installation area, reducing the maintenance frequency of the power battery pack, and extending the service life. The provision of the filling cavity provides space for the structural adhesive 200, preventing uncontrolled overflow of the structural adhesive 200 during assembly, thereby ensuring the connection effect of the structural adhesive 200 and improving the aesthetics of the battery pack. Furthermore, the sealed connection between the aluminum bar 310 and the hole wall of the accommodating hole ensures the stability of the connection between the aluminum bar 310 and the protective layer 330, and also helps to reduce the possibility of the structural adhesive 200 flowing out of the filling cavity during assembly.

[0034] In this embodiment, the top of the aluminum bar 310 is sealed and connected to the bottom of the hole wall of the accommodating hole, and the fireproof insulation board 100 covers the top of the accommodating hole.

[0035] By sealing the top of the aluminum bar 310 with the bottom of the accommodating hole and covering the top of the accommodating hole with a fireproof insulating plate 100, all-round protection of the internal components of the power battery pack is achieved, thereby improving the safety and reliability of the power battery pack.

[0036] Furthermore, the bottom of the aluminum bar 310 is connected to the battery cell pole 411 , and the battery cell pole 411 is provided on the top of the power battery cell 410 .

[0037] This design connects the bottom of the aluminum bar 310 to the cell terminal 411, which is located at the top of the power cell 410. This allows for quick connection and efficient management of the power cells 410 within the battery module 400, improving the production efficiency and connection quality of the battery module 400, and enhancing the overall performance and safety of the power battery pack. This connection method also enhances the overall structural strength and stability of the battery module 400, facilitating maintenance and replacement of the battery module 400, thereby increasing the service life and reliability of the power battery pack.

[0038] In this embodiment, the setting direction of the power cell 410 is the same as the height direction of the power battery pack, and the top of the power cell 410 is located directly above the bottom of the power cell 410; the thickness direction of the aluminum bar 310 is the same as the height direction of the power battery pack, and the top of the aluminum bar 310 is located directly above the bottom of the aluminum bar 310.

[0039] For example, at least two battery modules 400 are provided and arranged in parallel in the horizontal direction, and the CCS assembly 300 is fixedly connected to all the battery modules 400. The height direction of the power battery pack is perpendicular to the horizontal direction.

[0040] The design of horizontally juxtaposed battery modules 400 and fixedly connected CCS assemblies 300 to all battery modules 400 enables unified management and control of the battery modules 400, improving the overall performance and safety of the power battery pack. This layout design also helps increase the energy density and overall structural strength of the power battery pack.

[0041] In this embodiment, each aluminum bar 310 is at least partially located in a receiving hole, and the portion of the aluminum bar 310 located in the receiving hole is sealed and connected to the hole wall of the receiving hole.

[0042] By ensuring that each aluminum bar 310 is at least partially located in the receiving hole and sealed with the wall of the receiving hole, a reliable connection between the aluminum bar 310 and the battery cell pole 411 is achieved, thereby enhancing the electrical connection stability and structural strength inside the power battery pack, improving the safety of use, and helping to improve the compactness and integration of the entire power battery pack.

[0043] For example, the fireproof insulation board 100 is made of epoxy fiberglass. This material is resistant to high temperatures and offers excellent insulation and fire resistance. It effectively prevents internal short circuits and fires in the power battery pack from overheating or overcharging, thereby improving the safety of the power battery pack.

[0044] In this embodiment, the thickness of the fireproof insulation board 100 is 1.6 mm to 2.0 mm. Specifically, the thickness of the fireproof insulation board 100 is 1.8 mm.

[0045] The fireproof insulation board 100 with a thickness of 1.6 mm to 2.0 mm has excellent thermal insulation and heat insulation effects, which are better than glass and concrete. Its quality is as strong as metal, but its weight is similar to that of wood, which makes it easy to carry and install. It has certain flame retardant properties, is not easy to burn when exposed to fire, and has a slow burning speed and weak flame spread ability. It can be used in a variety of occasions requiring fire protection.

[0046] In one implementation of this embodiment, the aluminum bar 310 is adhesively connected to the protective layer 330. In another implementation of this embodiment, the aluminum bar 310 is welded to the protective layer 330.

[0047] By bonding or welding the aluminum bar 310 to the protective layer 330, a secure connection is achieved between the aluminum bar 310 and the protective layer 330, improving the overall structural stability and safety of the power battery pack. Furthermore, the above design provides a flexible connection method while ensuring a secure and reliable connection.

[0048] In this embodiment, the sampling circuit board 320 is welded to the aluminum bar 310. This welded connection provides a more reliable circuit connection and facilitates real-time monitoring of battery status and fault diagnosis. Furthermore, the welded connection offers high strength and stability, ensuring the safety and reliability of the power battery pack during operation.

[0049] In this embodiment, the protective layer 330 is a PET film.

[0050] The PET film used as the protective layer 330 has excellent high temperature resistance and insulation properties, and can effectively protect the internal components of the power battery pack from the influence of the external environment, thereby ensuring that the power battery pack can operate stably in various environments.

[0051] Exemplarily, the fireproof insulation board 100 is spaced apart from the sampling circuit board 320 .

[0052] The above design can optimize the internal structure of the power battery pack while ensuring safety, improve the overall space utilization, ensure the normal operation of the sampling circuit board 320, and improve the fireproof insulation performance of the power battery pack.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Power battery pack, characterized in that: The invention comprises a battery module (400), a CCS assembly (300), a structural adhesive (200) and a plurality of fireproof insulation boards (100), wherein the battery module (400) comprises a plurality of power cells (410), the CCS assembly (300) comprises a sampling circuit board (320), a protective layer (330) and a plurality of aluminum bars (310), wherein the aluminum bars (310) are connected to the sampling circuit board (320), and the sampling circuit board (320) and the protective layer (330) are stacked. The protective layer (330) is provided with a plurality of installation areas, the number of the installation areas is the same as the number of the aluminum bars (310), and each of the aluminum bars (310) is provided in one of the installation areas, the battery poles (411) of two adjacent power battery cells (410) are connected through one of the aluminum bars (310), a plurality of the fireproof insulation boards (100) cover all of the installation areas, and the structural adhesive (200) fills the gaps between the aluminum bars (310) and the fireproof insulation boards (100).

2. The power battery pack according to claim 1, characterized in that: The installation area is penetrated by a receiving hole, the aluminum bar (310) is sealed and connected to the hole wall of the receiving hole, the fireproof insulation board (100), the aluminum bar (310) and the hole wall of the receiving hole form a filling cavity, and the filling cavity is filled with structural glue (200).

3. The power battery pack according to claim 2, characterized in that: Each of the aluminum bars (310) is at least partially located in one of the receiving holes, and the portion of the aluminum bar (310) located in the receiving hole is sealed and connected to the hole wall of the receiving hole.

4. The power battery pack according to claim 2, characterized in that: The top of the aluminum bar (310) is sealed and connected to the bottom of the hole wall of the accommodating hole, and the fireproof insulation board (100) covers the top of the accommodating hole.

5. The power battery pack according to claim 4, characterized in that: The bottom of the aluminum bar (310) is connected to the battery pole (411), and the battery pole (411) is arranged on the top of the power battery (410).

6. The power battery pack according to claim 1, characterized in that: The fireproof insulation board (100) is made of epoxy glass fiber.

7. The power battery pack according to claim 6, characterized in that: The thickness of the fireproof insulation board (100) is 1.6 mm to 2.0 mm.

8. The power battery pack according to claim 1, characterized in that: The aluminum bar (310) is bonded to the protective layer (330); or The aluminum bar (310) is welded to the protective layer (330).

9. The power battery pack according to claim 1, characterized in that: At least two battery modules (400) are provided and arranged in parallel in a horizontal direction, and the CCS assembly (300) is fixedly connected to all the battery modules (400).

10. The power battery pack according to any one of claims 1 to 9, characterized in that: The fireproof insulation board (100) and the sampling circuit board (320) are spaced apart.

Images