A battery pack that is easy to assemble

Abstract

This utility model discloses a battery pack that is easy to assemble, including a housing and a battery cell assembly. The housing includes a base plate, a cover plate, and a panel. The panel is disposed at one end of the base plate. The base plate, cover plate, and panel form an accommodating space for accommodating the battery cell assembly. The panel is detachably connected to the base plate. Using this structure, the cover plate can be pre-assembled or a one-piece structure can be used. During assembly, the pre-assembled cover plate is snapped onto the base plate, which can greatly improve production efficiency and reduce maintenance difficulty during production.

Description

Technical Field

[0001] This utility model relates to a battery pack that is easy to assemble, and belongs to the field of battery technology. Background Technology

[0002] With the gradual development of battery application technology, ensuring the power performance and safety of batteries has become a crucial issue that needs to be addressed. To solve this problem, secondary cells are often connected in series and packaged during actual production. In the battery packaging process, the assembly process accounts for a significant portion of the production process; existing packaging processes require independent positioning and installation steps for the panels, consuming a large amount of labor time and severely reducing the efficiency of maintenance and installation. Therefore, developing a battery pack structure that enables rapid assembly, saves labor costs, and improves maintenance efficiency has become a critical technical challenge. Utility Model Content

[0003] To address the problems mentioned above in the background art, this utility model provides a battery pack that is easy to assemble.

[0004] The technical solution to achieve the purpose of this utility model is:

[0005] A battery pack that is easy to assemble includes a housing and a battery cell assembly. The housing includes a base plate, a cover plate, and a panel. The panel is disposed at one end of the base plate. The base plate, cover plate, and panel form an accommodating space for accommodating the battery cell assembly. The panel is detachably connected to the base plate.

[0006] With the above structure, the cover plate can be pre-assembled or it can be an integral structure. During the assembly process, the pre-assembled cover plate is snapped onto the base plate, which can greatly improve production efficiency and reduce maintenance difficulty during the production process.

[0007] Further or optionally, the cover plate has a flat plate parallel to the base plate, a first side wall and a second side wall perpendicular to the base plate and the panel. The battery cell assembly is fixed on the base plate. A fixing post is provided on the end of the base plate near the panel. A sliding buckle with an opening parallel to the first side wall and the second side wall is provided on the side of the panel near the accommodating space. The panel can be detachably connected to the base plate after being fixed by the sliding buckle and the fixing post. Battery pack control elements are integrated on the panel.

[0008] During assembly, the opening of the sliding buckle on the panel is pushed towards the fixing post. After the sliding buckle and the fixing post are matched, the accommodating space is closed. Then, a limiting device is set on the base plate near the outer side of the panel to fix the panel. In the above structure, the first side wall and the second side wall located on the outer part of the accommodating space are also provided with fixing baffles. The fixing baffles are arranged close to the first side wall and the second side wall at intervals and are fixed to the base plate with screws.

[0009] To improve the strength of the base plate, the aforementioned base plate is made of stamped and brazed aluminum.

[0010] The first and second sidewalls are also provided with L-shaped adhesive strips near the battery cell assembly. Structural adhesive for fixing the battery cell assembly is also provided between the base plate and the battery cell assembly. Both the structural adhesive and the L-shaped adhesive strips can play a role in fixing and conducting heat, which can accelerate the heat dissipation speed of the base plate.

[0011] Further or alternatively, in order to further improve the heat dissipation speed of the base plate, the base plate is a liquid cooling plate with an inlet and an outlet. The inlet and outlet are located on the side close to the panel. This allows the battery to be installed in the blind hole at the top opening during installation. During maintenance, it can be operated only on the side of the panel. When combined with other structures, it can improve the utilization rate of assembly space.

[0012] Further or optionally, to improve the assembly safety of the secondary cell assembly, the cell assembly includes multiple secondary cell groups. Each secondary cell group has an end plate at both ends, and a connecting plate is provided between the two end plates along the surface of the secondary cell group. A fixing steel strip surrounds the secondary cell group and the end plates, forming a space for placing the secondary cell groups. During assembly, the basic raw material units of the cell group are first assembled into the space formed by the connecting plate, fixing steel strip, and end plates.

[0013] Further or alternatively, to improve the safety of the steel strip installation process, the steel strip is an integrated design. In use, the steel strip only needs to be fastened to the secondary battery cell assembly to surround the secondary battery cell assembly. The operation process is highly safe and easier to automate compared to direct welding.

[0014] Further or alternatively, in order to improve the stability of the battery cell assembly installed on the base plate, the base plate is provided with protruding ribs, and the battery cell assembly is connected to the base plate through the protruding ribs. Specifically, a fixing baffle is provided around the battery cell assembly, and the baffle is fixed to the base plate by screws or heat-resistant adhesive after it is attached to the battery cell assembly.

[0015] Further or alternatively, in order to improve the thermal conductivity between the base plate and the battery cell assembly, a fireproof insulating sheet is provided between the battery cell assembly and the flat plate of the cover plate.

[0016] Further or optionally, in order to improve the safety of the battery cell assembly under impact, a foam strip is also provided between the battery cell assembly and the first and second sidewalls.

[0017] Further or optionally, to improve the convenience of panel maintenance, the panel is provided with an external port, which has an electrical interface and control buttons. Specifically, the power connector, battery management unit, fire detector, nozzle and other components of the battery pack are all integrated on the panel, so that all the components on it can be maintained after the panel is removed. In this way, the panel and the battery pack cover can be repaired separately without affecting each other.

[0018] Further or alternatively, to facilitate the installation of the battery pack, a hanging lug is provided at the connection between the base plate and the cover plate.

[0019] To enhance battery safety, the above structure is rated for IP67 protection.

[0020] By adopting the above technical solution, this utility model has the following beneficial effects:

[0021] (1) The cover plate of this application can be pre-assembled or can adopt an integrated structure. During the assembly process, the already assembled cover plate is snapped onto the base plate, which can greatly improve production efficiency and reduce maintenance difficulty during the production process.

[0022] (2) The battery pack of this application is easy to assemble and adopts an integrated panel. The panel and the base plate are connected by sliding buckles and fixing posts. During installation, the buckle type can be used for quick installation. During maintenance, only the panel needs to be repaired, which can greatly reduce maintenance costs.

[0023] (3) The liquid cooling plate inlet and outlet of the battery pack of this application are located on the side close to the panel. During the battery installation process, only one side of the panel needs to be left for maintenance, which can improve the space utilization during the battery assembly process.

[0024] (4) In a battery pack that is easy to assemble according to this application, the secondary cell group is pre-packaged with end plates and fixing steel strips, which makes the secondary cell group more stable and safer in the event of a violent collision.

[0025] (5) The steel strip of the low-level cell group in the battery pack of this application adopts an integrated design, which does not require welding during the installation process and is safer.

[0026] (6) The battery pack floor of this application is provided with ridges for easy assembly, and the secondary cell assembly has high installation stability.

[0027] (7) The battery pack of this application that is easy to assemble is provided with an L-shaped adhesive strip and a fixing baffle on the first side wall and the second side wall close to the cell assembly position, which can effectively fix the cover plate and has high stability.

[0028] (8) A fireproof insulating sheet is provided between the cover plate and the flat plate of a battery pack that is easy to assemble according to this application. It has good high-temperature safety and can prevent explosion.

[0029] (9) A foam strip is provided between the first and second sidewalls of the battery pack that is easy to assemble and the battery cell assembly, which makes it safer in the event of a violent collision and can prevent explosion caused by impact.

[0030] (10) An easy-to-assemble battery pack panel of this application is provided with an external port for easy electrical connection with other devices. Attached Figure Description

[0031] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0032] Figure 1 This is a schematic diagram of the structure of this utility model.

[0033] Figure 2 This is a schematic diagram of the buckle structure of this utility model;

[0034] Figure 3 This is a schematic diagram of the secondary battery cell assembly structure of this utility model;

[0035] Figure 4 This is a schematic diagram of the installation method of the secondary structure of the secondary cell of this utility model;

[0036] Figure 5 This is a schematic diagram of the liquid-cooled plate structure of this utility model.

[0037] The labels in the attached diagram are:

[0038] Shell 1, base plate 11, fixing column 111, water inlet 112, water outlet 113, fixing baffle 114;

[0039] Cover plate 12, flat plate 121, first side wall 122, second side wall 123;

[0040] Panel 13, sliding buckle 131;

[0041] Cell group 2, secondary cell group 21, end plate 22, connecting plate 23, fixing steel strip 24. Detailed Implementation

[0042] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this utility model and should not be used to limit the scope of protection of this utility model.

[0048] (Example 1)

[0049] See Figures 1-5 A type of battery pack that is easy to assemble.

[0050] A battery pack for easy assembly includes a housing 1 and a cell assembly 2. The housing 1 includes a base plate 11, a cover plate 12, and a panel 13. The panel 13 is disposed at one end of the base plate 11. The cover plate 12 has a flat plate 121 parallel to the base plate 11, a first sidewall 122 perpendicular to the base plate 11, and a second sidewall 123 perpendicular to the base plate 11 and the panel 13. The base plate 11, the cover plate 12, and the panel 13 form an accommodating space for accommodating the cell assembly 2. The cell assembly 2 is fixed on the base plate 11. A fixing post 111 is provided on the base plate 11 near the end of the panel 13. A sliding buckle 131 with an opening parallel to the first sidewall 122 and the second sidewall 123 is provided on the side of the panel 13 near the accommodating space. The panel 13 can be detachably connected to the base plate 11 after being fixed by the sliding buckle 131 and the fixing post 111. Battery pack control elements are integrated on the panel 13.

[0051] The base plate 11 is provided with L-shaped adhesive strips and fixed baffles 114 on both sides near the first side wall 122 and the second side wall 123 close to the battery cell assembly 2. The fixed baffles 114 are detachably spaced.

[0052] The battery cell assembly 2 includes multiple secondary battery cell assemblies 21. Each secondary battery cell assembly 21 has an end plate 22 at both ends. A connecting plate 23 is provided between the two end plates 22 along the surface of the secondary battery cell assemblies 21 to connect the end plates 22. A fixing steel strip 24 is provided around the end plates 22 and surrounds the secondary battery cell assemblies 21 and the end plates 22. The connecting plate 23, the fixing steel strip 24 and the end plates 22 form a space for placing the secondary battery cell assemblies 21. The steel strip 24 is an integral design and is directly fastened to the outside of the secondary battery cell assembly during the production process.

[0053] In the above structure, the battery cell group 2 is fixed inside the accommodating space, and multiple secondary battery cell groups 21 are connected in series. During installation, structural adhesive is applied to the base plate 11. The structural adhesive is made of heat dissipation material and is used to conduct heat between the battery cell group 2 and the base plate 11.

[0054] The base plate 11 has protruding ribs that fit the size of the battery cell assembly 2. During installation, the battery cell assembly 2 is placed on structural adhesive, which is cut and pasted according to the size of the battery cell assembly 2. After the battery cell assembly 2 is fixed, screws are used to fix the battery cell assembly 2 to the protruding ribs at both ends. After the battery cell assembly 2 is fixed, an L-shaped adhesive strip is placed at the edge of the base plate, and then the cover plate 12 is installed on the base plate 11. Fixing baffles 114 are set on the outer edges of the first side wall 122 and the second side wall 123 of the cover plate 12. The cover plate 12 is fixed to the base plate 11 by the combined action of the L-shaped adhesive strip and the fixing baffles 114.

[0055] The base plate 11 is a liquid cooling plate. The liquid cooling plate adopts a continuous flow channel design and adopts a stamping and brazing process during manufacturing. A reinforcing plate can be set at the end of the base plate 11 away from the battery pack 2. The reinforcing plate is used to strengthen the liquid cooling plate.

[0056] The liquid cooling plate has an inlet 112 and an outlet 113, which are located on the side near the panel 13. Specifically, the inlet 112 and the outlet 113 can be located on both sides of the panel 13 to increase the length of the flow channel distribution.

[0057] During the assembly process, in order to improve the impact resistance, fire resistance and safety performance of the battery pack, it is necessary to strengthen some parts. Specifically, a fireproof insulating sheet is provided between the cell group 2 and the cover plate 12 and the flat plate 121, and a foam strip is also provided between the cell group 2 and the first side wall 122 and the second side wall 123.

[0058] Fireproof insulating sheets, foam strips, and L-shaped sealing strips are manufactured using IP67 protection level technology.

[0059] The panel 13 is provided with an external port, which has an electrical interface and control buttons. Specifically, the battery pack's dynamic components, battery pack control elements, fire detection devices, nozzles and other components are integrated on the panel 13. After integration, an external electrical connection port is led out on the surface of the panel 13 to facilitate the connection of the battery pack with the outside.

[0060] A hanging ear is provided at the connection between the base plate 11 and the cover plate 12. The hanging ear can be set on the base plate 11 or welded separately to the connection position between the cover plate 12 and the base plate 11. In order to avoid interfering with the disassembly and assembly of the cover plate 13, the hanging ear is set on the opposite side of the base plate 11 away from the cover plate 13.

[0061] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack that is easy to assemble, characterized by: The device includes a housing (1) and a battery cell assembly (2). The housing (1) includes a base plate (11), a cover plate (12), and a panel (13). The panel (13) is disposed at one end of the base plate (11). The base plate (11), the cover plate (12), and the panel (13) form an accommodating space for accommodating the battery cell assembly (2). The panel (13) is detachably connected to the base plate (11). The cover plate (12) has a flat plate (121) parallel to the base plate (11) and a first sidewall (121) perpendicular to the base plate (11) and the panel (13). 22) and the second sidewall (123), the battery cell assembly (2) is fixed on the base plate (11), the base plate (11) is provided with a fixing post (111) near the end of the panel (13), the panel (13) is provided with a sliding buckle (131) with an opening parallel to the first sidewall (122) and the second sidewall (123) near the accommodating space, the panel (13) is connected to the base plate (11) after being fixed by the sliding buckle (131) and the fixing post (111); the panel (13) integrates battery pack control elements.

2. The battery pack of claim 1, wherein: The base plate (11) is a liquid cooling plate with an inlet (112) and an outlet (113). The inlet (112) and outlet (113) are located on the side near the panel (13).

3. The battery pack of claim 1, wherein: The battery cell assembly (2) includes multiple secondary battery cell assemblies (21). Each of the two ends of the secondary battery cell assembly (21) is provided with an end plate (22). A connecting plate (23) connecting the end plate (22) is provided between the two end plates (22) along the surface of the secondary battery cell assembly (21). A fixing steel strip (24) surrounding the secondary battery cell assembly (21) and the end plate (22) is provided outside the end plate (22). A space for placing the secondary battery cell assembly (21) is formed between the connecting plate (23), the fixing steel strip (24) and the end plate (22).

4. The battery pack of claim 3, wherein: The steel strip (24) is an integral design.

5. The battery pack of claim 3, wherein: The base plate (11) is provided with protruding ribs, and the battery cell assembly is connected to the base plate through the protruding ribs.

6. The battery pack of claim 3, wherein: The base plate (11) is provided with L-shaped baffle strips and fixed baffles (114) on both sides of the first side wall (122) and the second side wall (123) close to the battery cell assembly (2). The fixed baffles (114) are detachably spaced.

7. The battery pack of claim 3, wherein: A fireproof insulating sheet is provided between the battery cell assembly (2) and the flat plate (121) of the cover plate (12).

8. The battery pack of claim 3, wherein: Foam strips are also provided between the battery cell assembly (2) and the first sidewall (122) and the second sidewall (123).

9. The battery pack of claim 1, wherein: The panel (13) is provided with an external port, which has an electrical interface and control buttons.

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