Battery pack with double-sealing structure

Abstract

The utility model discloses a battery pack with a double-sealing structure, which comprises a lower box body frame, an upper box body frame and a lower box body frame, the liquid cooling plate is connected with the bottom of the lower box body frame; the first sealant is arranged between the lower box body frame and the liquid cooling plate, and the gap between the lower box body frame and the liquid cooling plate is sealed by the first sealant; the bottom support is connected with the bottom of the lower box body frame; the second sealant is arranged between the lower box body frame and the bottom support and seals a gap between the lower box body frame and the bottom support, the liquid cooling plate and the frame form a first seal, and the frame and the battery pack bottom protection plate form a second seal, so that a dual-seal effect is achieved, and safety accidents caused by water inflow of the battery pack due to sealing failure are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and particularly relates to a battery pack with a double-sealing structure. Background Art

[0002] In the process of implementing the present utility model, the inventor found that the prior art has at least the following problems:

[0003] As the most important component of an electric vehicle, the safety of the battery pack is of utmost concern to consumers. Water ingress into the battery pack can cause battery short circuits, easily leading to safety accidents such as fires and explosions. Therefore, how to properly seal the battery pack is very important.

[0004] The sealing effect of traditional power batteries is poor, and seal failure can cause water ingress into the battery pack, leading to safety accidents.

[0005] CN218472187U - Battery pack sealing cover, battery pack sealing cover assembly, battery pack and vehicle discloses a battery pack sealing cover, battery pack sealing cover assembly, battery pack and vehicle. The battery pack sealing cover is integrally formed and includes a plurality of plate bodies arranged in sequence along its length direction and transition plates connecting adjacent two plate bodies, which also cannot solve the above technical problems. Summary of the Utility Model

[0006] The technical problem to be solved by the present utility model is to provide a battery pack with a double-sealing structure, which forms a first seal with a liquid cooling plate and a frame, and a second seal with the frame and the bottom protection plate of the battery pack, achieving a double-sealing effect and solving the safety accidents caused by water ingress into the battery pack due to seal failure.

[0007] To solve the above technical problem, the technical solution adopted by the present utility model is: A battery pack with a double-sealing structure, having:

[0008] A lower box body frame capable of supporting the battery cells;

[0009] A liquid cooling plate connected to the bottom of the lower box body frame;

[0010] A first sealant disposed between the lower box body frame and the liquid cooling plate, and the first sealant seals the gap between the lower box body frame and the liquid cooling plate;

[0011] A bottom tray connected to the bottom of the lower box body frame;

[0012] A second sealant disposed between the lower box body frame and the bottom tray, and the second sealant seals the gap between the lower box body frame and the bottom tray.

[0013] An inner frame is provided on the lower box body frame, and the liquid cooling plate is attached to the inner frame; the first sealant is disposed between the liquid cooling plate and the inner frame.

[0014] An outer frame is provided on the lower box body frame, and the bottom support is attached to the outer frame; the second sealant is provided between the bottom support and the outer frame.

[0015] The outer frame is connected to the inner frame; the inner frame is provided inside the outer frame.

[0016] The liquid cooling plate is provided with a water inlet and a water outlet.

[0017] A series of reinforcing ribs are provided on the bottom support.

[0018] One of the above technical solutions has the following advantages or beneficial effects. The liquid cooling plate and the frame form the first seal, and the frame and the bottom protection plate of the battery pack form the second seal, achieving a double-sealing effect and solving the safety accident caused by water ingress into the battery pack due to seal failure. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a battery pack with a double-sealing structure provided in an embodiment of the present invention;

[0020] Figure 2 It is Figure 1 a schematic structural diagram of a battery pack with a double-sealing structure;

[0021] Figure 3 It is Figure 1 a schematic structural diagram of a battery pack with a double-sealing structure;

[0022] Figure 4 It is Figure 1 a schematic structural diagram of a battery pack with a double-sealing structure;

[0023] The markings in the above figures are all: 1, lower box body frame; 11, outer frame; 12, inner frame; 2, first sealant; 3, liquid cooling plate; 31, water inlet; 4, second sealant; 5, bottom support; 51, reinforcing rib. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] See Figures 1 to 4 , a battery pack with a double-sealing structure, having:

[0026] The lower box body frame 1 can support the battery cells; it is the frame of the entire battery pack and plays a supporting role. The liquid cooling plate 3 is connected to the bottom of the lower box body frame 1; the liquid cooling plate 3 plays a role in cooling the battery cells. The first sealant 2 is arranged between the lower box body frame 1 and the liquid cooling plate 3, and the first sealant 2 seals the gap between the lower box body frame 1 and the liquid cooling plate 3; the bottom support 5 is connected to the bottom of the lower box body frame 1; the second sealant 4 is arranged between the lower box body frame 1 and the bottom support 5, and the second sealant 4 seals the gap between the lower box body frame 1 and the bottom support 5. Through the double-layer sealing structure between the bottom support 5 and the lower box body frame 1 and between the liquid cooling plate 3 and the lower box body frame 1, after one layer fails, there will still be another layer of sealing, achieving a double-sealing effect and solving the safety accident caused by water ingress into the battery pack due to seal failure.

[0027] An inner frame 12 is provided on the lower box body frame 1, and the liquid cooling plate 3 is attached to the inner frame 12; the first sealant 2 is arranged between the liquid cooling plate 3 and the inner frame 12. An outer frame 11 is provided on the lower box body frame 1, and the bottom support 5 is attached to the outer frame 11; the second sealant 4 is arranged between the bottom support 5 and the outer frame 11. Through the inner and outer two-layer sealing, the two layers of sealing are divided into inner and outer structures. After one layer fails, there will still be another layer of sealing, achieving a double-sealing effect and solving the safety accident caused by water ingress into the battery pack due to seal failure.

[0028] The outer frame 11 is connected to the inner frame 12; the inner frame 12 is arranged inside the outer frame 11. The two-layer sealing is divided into inner and outer structures to achieve a double-sealing effect and solve the safety accident caused by water ingress into the battery pack due to seal failure.

[0029] The liquid cooling plate 3 is provided with a water inlet 31 and a water outlet, and through the liquid circulation of the water inlet 31 and the water outlet, it plays a role in cooling the battery cells.

[0030] A series of reinforcing ribs 51 are provided on the bottom support 5, and the bottom support 5 plays a supporting role. By providing the reinforcing ribs 51, the strength of the bottom support 5 can be increased, thereby increasing the reliability of the entire battery cell.

[0031] The liquid cooling plate and the frame are connected by riveting, and the riveted part is sealed in the form of a two-component sealant; the bottom protection plate of the battery pack and the frame are connected by a sealing strip and bolts to achieve a sealing effect; the above two sealing schemes are implemented simultaneously to achieve a double-sealing effect.

[0032] After adopting the above structure, the liquid cooling plate and the frame form the first seal, and the frame and the bottom protection plate of the battery pack form the second seal, achieving a double-sealing effect and solving the safety accident caused by water ingress into the battery pack due to seal failure.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0034] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "set", "connected", "fixed", "swivelly connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A battery pack with a double-sealed structure, characterized in that: have: A lower box frame capable of supporting the battery cells; A liquid cooling plate connected to the bottom of the lower box frame; A first sealant is disposed between the lower box frame and the liquid cooling plate, and the first sealant seals the gap between the lower box frame and the liquid cooling plate; A bottom bracket connected to the bottom of the lower box frame; The second sealant is arranged between the lower box frame and the bottom bracket, and the second sealant seals the gap between the lower box frame and the bottom bracket.

2. The battery pack with a double sealing structure as claimed in claim 1, characterized in that: An inner frame is provided on the lower box frame, and the liquid cooling plate is fitted with the inner frame; and the first sealant is provided between the liquid cooling plate and the inner frame.

3. The battery pack with a double sealing structure as claimed in claim 2, characterized in that: An outer frame is arranged on the lower box frame, and the bottom bracket is fitted with the outer frame; the second sealant is arranged between the bottom bracket and the outer frame.

4. The battery pack with a double sealing structure as claimed in claim 3, characterized in that: The outer frame is connected to the inner frame; the inner frame is arranged on the inner side of the outer frame.

5. The battery pack with a double sealing structure as claimed in claim 4, characterized in that: The liquid cooling plate is provided with a water inlet and a water outlet.

6. The battery pack with a double sealing structure as claimed in claim 5, characterized in that: A series of reinforcing ribs are arranged on the bottom bracket.

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