Battery pack packaging shell

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack packaging shell which comprises a box body with a mounting cavity, and the top of the box body is buckled through an upper cover with a sleeve cavity to form a sealed cavity; the box body comprises a frame body and a bottom plate which can be connected with each other, the frame body comprises a pair of long frames, the section of each long frame is in an L shape, each long frame comprises a long frame outer baffle and a long frame inner baffle which are connected with each other, and the height of each long frame outer baffle is larger than that of each long frame inner baffle. The inner wall of the long-frame inner baffle plate can be partially contacted with the long side edge of the battery cell module; and a ventilation cavity groove is formed among the inner wall of the long-frame outer baffle plate, the top of the long-frame inner baffle plate and the long side edge of the battery cell module. According to the scheme, the structure is simple, the fixing effect on the battery cell module is good, the contact surface between the battery cell module and air can be effectively increased, and guarantee is provided for stable work of the battery cell module while the efficiency of assembling the battery cell module and the shell is effectively improved.

Description

Technical Field

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

[0002] At present, new energy vehicles have attracted wide attention from all walks of life due to their excellent environmental performance. The requirements for new energy vehicles are also constantly increasing. As a new energy vehicle, electric vehicles are also developing in the direction of high safety, high energy ratio and light weight. The main factor that determines the mileage of electric vehicles is the power supply battery. Different specifications of power supply batteries can be selected for different models to meet driving requirements.

[0003] The power supply battery for electric vehicles is generally composed of a battery pack consisting of multiple battery modules, that is, multiple battery modules are stacked in the same box, and then the battery modules are connected. The core battery module is generally configured with a corresponding number of batteries according to the size of the required output voltage, and then all the batteries are connected to output the voltage.

[0004] The shell used to encapsulate the battery module in traditional technology is not only complex in structure and difficult to fix to the frame, but also the inner wall of the cavity is completely in contact with the battery module, resulting in a small ventilation space. When the battery is working, it will generate a lot of heat. If there is not enough ventilation space, it will not be conducive to the dissipation of heat, which is very likely to cause safety accidents. On the other hand, since the traditional battery module is directly in contact with the four inner walls of the shell, the assembly space reserved for operators is very small, which leads to assembly troubles and seriously restricts the efficiency of battery packaging.

[0005] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0006] The purpose of the present utility model is to overcome the above-mentioned problems of the prior art and to provide a battery pack packaging shell to solve the technical problems in the traditional technology that the complete fit between the inside of the shell and the battery cell module is not conducive to the heat dissipation of the battery cell module during operation, and the traditional shell reserves very little assembly space for operators, which leads to low assembly efficiency.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A battery pack packaging shell comprises a box body with an installation cavity, the top of the box body is buckled with an upper cover with a sleeve cavity to form a sealed chamber; the box body comprises a frame body and a bottom plate that can be connected to each other, the frame body comprises a pair of long frames, the cross-section of the long frames is L-shaped, and comprises a long frame outer baffle plate and a long frame inner baffle plate that are connected to each other, the height of the long frame outer baffle plate is greater than the height of the long frame inner baffle plate, and the inner wall of the long frame inner baffle plate can partially contact the long side of a battery cell module; the inner wall of the long frame outer baffle plate, the top of the long frame inner baffle plate, and the long side of the battery cell module form a ventilation cavity.

[0009] Furthermore, the frame body further comprises a first wide frame and a second wide frame arranged at both ends of the two long frames, and the first wide frame and the second wide frame can limit the first short side edge and the second short side edge of the battery cell module.

[0010] Furthermore, a limiting baffle capable of limiting the second short side of the battery cell module is arranged on the inner side adjacent to the second wide frame, and two ends of the limiting baffle are clamped by the two long frames.

[0011] Furthermore, the top of the limiting baffle is not higher than the top of the outer baffle of the long frame.

[0012] Furthermore, a frame wing plate extending outward is arranged on the outer side of the outer baffle plate of the long frame, and a plurality of connecting through holes are arranged on the frame wing plate.

[0013] Furthermore, the outer baffle plate of the long frame and the inner baffle plate of the long frame are both provided with a hollow isolation cavity, and a horizontal or vertical rib plate is provided in the isolation cavity.

[0014] Furthermore, hollow wide frame cavities are provided in the plate bodies of the first wide frame and the second wide frame.

[0015] Furthermore, the box body is made of aluminum alloy, and the upper cover is made of plastic.

[0016] Furthermore, an explosion-proof valve is also provided on the frame.

[0017] Furthermore, a slide groove matching the shape of the bottom plate is provided on the bottom side of the frame, and the bottom plate is slidably connected with the frame through the slide groove.

[0018] Beneficial Effects

[0019] The utility model provides a battery pack packaging shell, which partially contacts and limits the long side of the battery cell module through a pair of L-shaped long frames, and sets a ventilation cavity structure at the contacting part, which not only increases the contact surface between the battery cell module and the air, but also can effectively limit and fix the battery cell module, and the increased space is convenient for assembly operation. Compared with the traditional battery pack shell, this scheme is not only simple in structure and has a good fixing effect on the battery cell module, but also can effectively increase the contact surface between the battery cell module and the air, effectively improving the efficiency of the assembly of the battery cell module and the shell, but also provides a guarantee for the stable operation of the battery cell module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a battery pack packaging shell according to the utility model;

[0021] Figure 2 A cross-sectional view of a battery pack packaging shell according to the utility model;

[0022] Figure 3 This is an exploded view from a first perspective of a battery pack packaging shell according to the utility model;

[0023] Figure 4 It is an exploded view from a second perspective of a battery pack packaging shell according to the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of an isolation cavity and a rib plate in a battery pack packaging shell according to the utility model;

[0025] Figure 6 It is a schematic diagram from a first perspective of a battery pack packaging shell according to the utility model, in which a battery cell module and a limit baffle are assembled;

[0026] Figure 7 This is a schematic diagram from a second perspective showing a battery pack packaging shell according to the present invention in which a battery cell module and a limit baffle are assembled.

[0027] Graphic marking:

[0028] 1-box body, 101-installation cavity, 102-frame body, 103-bottom plate, 104-long frame, 105-long frame outer baffle, 106-long frame inner baffle, 107-ventilation cavity groove, 108-first wide frame, 109-second wide frame, 110-slide groove;

[0029] 2-upper cover, 201-sleeve cavity;

[0030] 3- Chamber;

[0031] 4-battery cell module, 401-long side, 402-first short side, 403-second short side;

[0032] 5-limit baffle;

[0033] 6-frame wing plate, 601-connection through hole;

[0034] 7-isolation cavity slot;

[0035] 8-rib plate;

[0036] 9- wide frame cavity;

[0037] 10- Explosion-proof valve. DETAILED DESCRIPTION

[0038] The utility model is further described in detail below based on the accompanying drawings and embodiments. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] like Figure 1 to Figure 4 As shown, the present solution provides a battery pack packaging shell, including a box body 1 with an installation cavity 101, the top of the box body 1 is buckled with an upper cover 2 with a sleeve cavity 201 to form a sealed chamber 3, and the chamber 3 is used to package the battery cell module 4; the box body 1 includes a frame body 102 and a bottom plate 103 that can be connected to each other, and the frame body 102 and the bottom plate 103 are connected to form the installation cavity 101; the frame body 102 includes a pair of long frames 104, and the cross-section of the long frame 104 is L-shaped, including a long frame outer baffle 105 and a long frame inner baffle 106 that are connected to each other, The height of the outer baffle plate 105 of the long frame is greater than the height of the inner baffle plate 106 of the long frame, and the inner wall of the inner baffle plate 106 of the long frame can partially contact the long side 401 of the battery module 4 so as to achieve limited blocking of the side of the battery module 4; the inner wall of the outer baffle plate 105 of the long frame, the top of the inner baffle plate 106 of the long frame, and the long side 401 of the battery module 4 form a ventilation cavity 107, which is not only convenient for exposing the long side 401 of the battery module 4 to the air, which is beneficial to cooling, but also facilitates the assembly between the battery module 4 and the installation cavity 101.

[0040] The box body 1 is made of aluminum alloy, and the upper cover 2 is made of plastic, which is connected by buckles or screws.

[0041] In addition, it should be noted that Figure 6 and Figure 7As shown, the height of the battery cell module 4 in this embodiment is higher than the installation cavity 101, and partially extends into the sleeve cavity 201, but does not contact the top wall of the sleeve cavity 201, and then after the battery cell module 4 is installed, the sleeve cavity 201 is connected with the two ventilation cavity grooves 107. This structure allows the top of the battery cell module 4 and the upper parts of the two long sides 401 to be in contact with the air. Compared with the traditional shell structure that fully wraps the battery cell module 4, the battery pack packaging shell provided by this solution can provide the battery cell module 4 with a larger heat dissipation space, and under this space, it is also convenient to provide more assembly operation space.

[0042] In addition, according to the needs of actual working conditions, a number of small ventilation holes can be set on the upper cover 2 or the frame 102 to facilitate the circulation of internal and external air without affecting the battery module 4 in the chamber, thereby achieving the purpose of interactive heat dissipation of internal and external air.

[0043] like Figure 3 and Figure 4 As shown, the frame body 102 in this embodiment also includes a first wide frame 108 and a second wide frame 109 arranged at both ends of the two long frames 104, and the first wide frame 108 and the second wide frame 109 can limit the first short side 402 and the second short side 403 of the battery cell module 4.

[0044] As an optimization of this embodiment, Figure 6 and Figure 7 As shown, a limiting baffle 5 capable of limiting the second short side 403 of the battery module 4 is provided on the inner side adjacent to the second wide frame 109, and the two ends of the limiting baffle 5 are clamped by the two long frames 104. Under the action of the first wide frame 108 and the limiting baffle 5, the first short side 402 and the second short side 403 of the battery module 4 are tightly clamped. By adjusting the limiting baffle 5, it can adapt to the limiting of the second short side 403 of the battery module 4 of different lengths.

[0045] It should be noted that the top of the limiting baffle 5 is not higher than the top of the long frame outer baffle 105 , and thus will not interfere with the sleeve cavity 201 located in the upper cover 2 .

[0046] like Figure 1 As shown, as a further optimization of this embodiment, the outer side of the long frame outer baffle 105 is provided with a frame wing plate 6 extending outward, and the frame wing plate 6 is provided with a plurality of connecting through holes 601 so as to realize the connection with the frame by screws passing through, thereby firmly fixing the box body to the frame of the vehicle.

[0047] like Figure 5As shown, as an optimization of the frame 102 in this embodiment, the long frame outer baffle 105 and the long frame inner baffle 106 are both provided with a hollow isolation cavity 7, and a horizontal or vertical rib 8 is provided in the isolation cavity 7. The isolation cavity 7 can penetrate the long frame outer baffle 105 and the long frame inner baffle 106. This structure is not only beneficial to the heat conduction of the long frame outer baffle 105 and the long frame inner baffle 106 themselves to achieve the purpose of heat dissipation, but also makes the shell more lightweight.

[0048] In addition, the setting of the isolation cavity 7 can ensure that when the long frame outer baffle 105 is subjected to external impact, the concave deformation on the outside will not be easily transmitted to the inside, and thus will not cause extrusion damage to the two long sides 401 of the battery cell module 4 located in the chamber 3, thereby improving the safety of the battery cell module 4.

[0049] Hollow wide frame cavities 9 may also be provided in the plate bodies of the first wide frame 108 and the second wide frame 109, such as Figure 2 As shown, its function is the same as that of the isolation cavity 7 in the long frame outer baffle 105 and the long frame inner baffle 106. The most important thing is that while ensuring lightweight, it can also ensure that when subjected to external impact, the first short side 402 and the second short side 403 of the battery cell module 4 will not be deformed or squeezed.

[0050] like Figure 1 As shown, in this embodiment, an explosion-proof valve 10 is also provided on the frame 102. When the pressure inside the chamber suddenly increases or the temperature rises rapidly, the valve will be automatically triggered, popped open, and high-pressure gas will be released to the outside. This design can effectively prevent the battery from exploding due to excessive internal pressure, thereby protecting the safety of the battery and surrounding equipment.

[0051] like Figure 4 As shown, as a connection method between the bottom plate 103 and the frame 102, in this embodiment, a slide groove 110 matching the shape of the bottom plate 103 is provided on the bottom side of the frame 102, and the bottom plate 103 is slidably connected with the frame 102 through the slide groove 110. This structure is similar to a drawer structure, and the connection with the frame 102 is completed by pulling the bottom plate, and it is fixed by screws to prevent displacement.

[0052] The above description is only for illustrating the implementation mode of the present utility model and is not intended to limit the present utility model. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A battery pack packaging shell, characterized in that: The invention comprises a box body (1) with an installation cavity (101), the top of the box body (1) being buckled with an upper cover (2) with a sleeve cavity (201) to form a sealed chamber (3); the box body (1) comprises a frame body (102) and a bottom plate (103) which can be connected to each other, the frame body (102) comprising a pair of long frames (104), the cross section of the long frames (104) being L-shaped, comprising long frame outer baffles (105) and long frame inner baffles (105) which are connected to each other. The baffle plate (106) is provided with a height of the outer baffle plate (105) of the long frame being greater than the height of the inner baffle plate (106) of the long frame, and the inner wall of the inner baffle plate (106) of the long frame can partially contact the long side edge (401) of the battery cell module (4); and a ventilation cavity groove (107) is formed between the inner wall of the outer baffle plate (105) of the long frame, the top of the inner baffle plate (106) of the long frame, and the long side edge (401) of the battery cell module (4).

2. A battery pack packaging shell according to claim 1, characterized in that: The frame (102) further comprises a first wide frame (108) and a second wide frame (109) arranged at both ends of the two long frames (104); the first wide frame (108) and the second wide frame (109) are capable of limiting the first short side (402) and the second short side (403) of the battery cell module (4).

3. A battery pack packaging shell according to claim 2, characterized in that: A limiting baffle (5) capable of limiting the second short side (403) of the battery cell module (4) is arranged on the inner side adjacent to the second wide frame (109), and the two ends of the limiting baffle (5) are clamped by the two long frames (104).

4. A battery pack packaging shell according to claim 3, characterized in that: The top of the limiting baffle (5) is not higher than the top of the long frame outer baffle (105).

5. The battery pack packaging shell according to claim 1, characterized in that: A frame wing plate (6) extending outward is arranged on the outer side of the long frame outer baffle plate (105), and a plurality of connecting through holes (601) are arranged on the frame wing plate (6).

6. A battery pack packaging shell according to claim 2, characterized in that: The long frame outer baffle (105) and the long frame inner baffle (106) are both provided with a hollow isolation cavity (7), and a horizontal or vertical rib plate (8) is provided in the isolation cavity (7).

7. A battery pack packaging shell according to claim 6, characterized in that: Hollow wide frame cavities (9) are provided in the plate bodies of the first wide frame (108) and the second wide frame (109).

8. The battery pack packaging shell according to claim 7, characterized in that: The box body (1) is made of aluminum alloy, and the upper cover (2) is made of plastic.

9. The battery pack packaging shell according to claim 1, characterized in that: An explosion-proof valve (10) is also provided on the frame (102).

10. The battery pack packaging shell according to claim 1, characterized in that: A slide groove (110) matching the shape of the bottom plate (103) is arranged on the bottom side of the frame (102), and the bottom plate (103) is slidably connected with the frame (102) through the slide groove (110).

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