New energy automobile battery pack

Abstract

The utility model discloses a new energy automobile battery pack. The new energy automobile battery pack comprises a plurality of single batteries, an inner shell assembly, an outer shell assembly and a bus board, the first air hole is formed in the upper baffle of the shell assembly in a penetrating manner; the second air hole is formed in the lower baffle of the shell assembly in a penetrating manner; the air pipe is arranged on the inner shell assembly in an up-down penetrating manner; the first air hole, the air pipe and the second air hole are sequentially communicated to form a cooling air duct. According to the utility model, through the connectivity of the upper baffle plate, the lower baffle plate and the air pipe, a continuous cooling air duct is formed, and cooling air flows through the battery monomers effectively, so that the heat dissipation efficiency is improved, and the overall heat dissipation performance of the new energy automobile battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and in particular to a new energy automobile battery pack. Background Art

[0002] The battery pack of new energy vehicles is an important part of electric vehicles. It is responsible for storing and providing electrical energy. It is composed of multiple battery cells and has high energy density and power density. However, the battery will generate heat during use. Long-term operation in a high temperature environment will lead to a decrease in battery performance, shortened life, and even safety hazards. Therefore, the heat dissipation performance of the battery pack is very important to ensure the safety and performance of the battery system.

[0003] At present, the heat dissipation technology for new energy vehicle battery packs mainly uses metal heat sinks or heat dissipation plates as heat conduction media to conduct heat dissipation between the battery pack and the external environment. However, this traditional heat dissipation method has problems such as low heat transfer efficiency and high requirements for heat dissipation materials, which limits the improvement of heat dissipation effect. In addition, there are also methods of using fans or heat exchangers to dissipate heat from battery packs. This method can effectively improve the heat dissipation efficiency, but the uniformity of heat dissipation has very strict requirements on the heat dissipation air duct, and local overheating is prone to occur. Therefore, the current heat dissipation technology still has certain limitations in improving heat dissipation efficiency and reducing battery temperature. Utility Model Content

[0004] In order to improve the heat dissipation performance of a new energy vehicle battery pack, the utility model provides a new energy vehicle battery pack.

[0005] The technical solution of the utility model is as follows: a new energy vehicle battery pack, comprising: a plurality of single cells, arranged vertically and evenly; an inner shell assembly, used to install and fix the plurality of single cells; an outer shell assembly, arranged outside the inner shell assembly for protection; a busbar, in contact with the electrode sheets of the single cells and electrically connected to an external circuit; an upper baffle and a lower baffle, which are the upper and lower panels of the outer shell assembly; a first air hole, which is arranged on the upper baffle; a second air hole, which is arranged on the lower baffle; an air duct, which is arranged on the inner shell assembly from top to bottom; the first air hole, the air duct and the second air hole are connected in sequence to form a cooling air duct.

[0006] Preferably, the inner shell assembly comprises an upper frame and a lower frame, and the upper frame and the lower frame are glued together after being buckled together, and a accommodating space corresponding to the single battery is formed inside.

[0007] Preferably, the air duct is divided into two sections, upper and lower sections, which are buckled together with the upper frame and the lower frame to form a whole.

[0008] Preferably, the outer ends of both sides of the air duct are provided with a plurality of protrusions, and wind distribution openings are formed between adjacent protrusions.

[0009] Preferably, the protrusion supports the upper baffle and the lower baffle.

[0010] Preferably, the first air holes, the second air holes and the single cells are arranged in one-to-one correspondence.

[0011] Preferably, a plurality of the single cells are connected in parallel, and the busbar comprises a plate body and a plurality of contact sheets, wherein the contact sheets protrude inwardly from the plate body and contact with the electrode sheets of the single cells.

[0012] Preferably, an insulating protection plate with a consistent appearance is provided on the outside of the busbar.

[0013] The utility model has the following beneficial effects: the utility model forms a continuous cooling air duct through the connectivity of the upper baffle, the lower baffle and the air duct, effectively passes the cooling air flow through the battery cells, improves the heat dissipation efficiency, and improves the overall heat dissipation performance of the new energy vehicle battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the appearance of the utility model.

[0015] Figure 2 It is a schematic diagram of the housing assembly in the utility model (some components are omitted).

[0016] Figure 3 It is an assembly diagram of a single battery and an inner shell component in the utility model.

[0017] Figure 4 It is an assembly drawing of the busbar and the inner shell component in the utility model.

[0018] Single cell 1; inner shell assembly 2, air duct 201, upper frame 202, lower frame 203, protrusion 204; outer shell assembly 3, upper baffle 301, lower baffle 302, first air hole 303, second air hole 304; busbar 4, plate body 401, contact sheet 402, insulating protection plate 5. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the embodiments and drawings.

[0020] In the embodiment, Figures 1 to 4As shown, a new energy vehicle battery pack includes: a plurality of single cells 1, arranged vertically and evenly; an inner shell assembly 2, used to install and fix a plurality of single cells 1; an outer shell assembly 3, arranged outside the inner shell assembly 2 for protection; a busbar 4, in contact with the electrode sheet of the single cell 1, and electrically connected to the external circuit; an upper baffle 301 and a lower baffle 302, which are upper and lower panels of the outer shell assembly 3; a first air hole 303, which is arranged through the upper baffle 301; a second air hole 304, which is arranged through the lower baffle 302; an air duct 201, which is arranged through the upper and lower parts of the inner shell assembly 2; the first air hole 303, the air duct 201 and the second air hole 304 are connected in sequence to form a cooling air duct. In this embodiment, a continuous cooling air duct is formed through the connectivity of the upper baffle 301, the lower baffle 302 and the air duct 201, which effectively passes the cooling airflow through the battery cells, improves the heat dissipation efficiency, and improves the overall heat dissipation performance of the new energy vehicle battery pack.

[0021] In the embodiment, Figure 3~4 As shown, the inner shell assembly 2 includes an upper frame 202 and a lower frame 203, which are glued together after being buckled together, and a receiving space corresponding to the single battery 1 is formed inside. The air duct 201 is divided into upper and lower sections, which are buckled together with the upper frame 202 and the lower frame 203 to form a whole. The inner shell assembly 2 plays the role of fixing the single battery 1, and generally uses engineering plastics such as polypropylene (PP) and polyamide (PA), which have good mechanical properties and electrical insulation properties, and are suitable for isolating and fixing the single battery 1.

[0022] In the embodiment, Figure 3~4 As shown, the outer ends of the air duct 201 on both sides have a plurality of protrusions 204, and the wind distribution ports between the adjacent protrusions 204; the protrusions 204 support the upper baffle 301 and the lower baffle 302. This wind distribution port design enables the cooling airflow to be evenly distributed on both sides of the air duct 201, so that the cooling air can flow through the single cell 1 more evenly, thereby improving the heat dissipation uniformity of the entire battery pack and avoiding the occurrence of local overheating. Due to the setting of the wind distribution port, the cooling air can have more contact area with the single cell 1, which can improve the heat transfer effect, so that the single cell 1 can cool down more quickly during the heat dissipation process, and improve the heat dissipation efficiency. The setting of the protrusion 204 enables the upper baffle 301, the lower baffle 302 and the protrusion 204 to form a good contact, which can enhance the structural stability of the housing assembly 3 and prevent displacement or loosening under vibration or impact conditions.

[0023] In the embodiment, Figure 2As shown, the first air hole 303 and the second air hole 304 are arranged in one-to-one correspondence with the single battery 1. This method ensures that the cooling air can directly contact the surface of each single battery 1, effectively absorb and take away the waste heat generated by the battery, effectively reduce the temperature of the battery, and improve the cooling effect of the entire battery pack. In addition, the cooling air can flow evenly through each single battery 1, avoiding the local distribution of the cooling air inside the battery pack, improving the uniformity of heat dissipation, and avoiding the problem of uneven performance or shortened life of the battery cells due to excessive temperature differences. In addition, the cooling air can directly contact the surface of the single battery 1, which improves the cooling efficiency, allows the battery to cool down more quickly, avoids overheating, and improves the heat dissipation efficiency of the entire battery pack.

[0024] In the embodiment, Figure 4 As shown, several single cells 1 are connected in parallel, and the busbar 4 includes a board body 401 and several contact sheets 402. The contact sheets 402 protrude inward from the board body 401 and contact the electrode sheets of the single cells 1. An insulating protection plate 5 with a consistent appearance is provided on the outside of the busbar 4. By connecting multiple single cells 1 in parallel, the current can be evenly distributed among these single cells 1, avoiding the uneven current distribution between battery components, which helps to improve the overall performance and life of the battery components. The raised contact sheet 402 on the busbar 4 contacts the electrode sheet of the single cell 1, ensuring that the current can flow smoothly through the battery. The raised contact sheet 402 design can provide better contact pressure and reliability, thereby reducing contact resistance, reducing the generation of resistance heat, and improving the efficiency and performance of the entire battery pack. An insulating protection plate 5 is provided on the outside of the busbar 4, which can provide dual protection for the busbar 4 and the battery, effectively isolating the current and the battery components, and reducing the risk of short circuits or other safety issues.

[0025] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A new energy vehicle battery pack, characterized in that: include: A plurality of single cells (1) are evenly arranged vertically; An inner shell assembly (2) used for mounting and fixing a plurality of the single batteries (1); An outer shell component (3) is arranged outside the inner shell component (2) for protection; A busbar (4) in contact with the electrode sheets of the single battery (1) and electrically connected to an external circuit; The upper baffle plate (301) and the lower baffle plate (302) are upper and lower panels of the housing assembly (3); A first air hole (303) is arranged through the upper baffle plate (301); A second air hole (304) is arranged through the lower baffle plate (302); An air duct (201) is arranged to penetrate the inner shell component (2) from top to bottom; The first air hole (303), the air duct (201), and the second air hole (304) are connected in sequence to form a cooling air duct.

2. The new energy vehicle battery pack according to claim 1, characterized in that: The inner shell assembly (2) comprises an upper frame (202) and a lower frame (203), wherein the upper frame (202) and the lower frame (203) are snapped together and glued together to form a receiving space corresponding to the single battery (1) in a one-to-one manner.

3. The new energy vehicle battery pack according to claim 2, characterized in that: The air duct (201) is divided into two sections, upper and lower sections, which are buckled together with the upper frame (202) and the lower frame (203) to form a whole.

4. The new energy vehicle battery pack according to claim 2, characterized in that: The air duct (201) shown has a plurality of protrusions (204) at both outer ends thereof, and air distribution openings between adjacent protrusions (204).

5. The new energy vehicle battery pack according to claim 4, characterized in that: The protrusion (204) supports the upper baffle (301) and the lower baffle (302).

6. The new energy vehicle battery pack according to claim 1, characterized in that: The first air holes (303) and the second air holes (304) are arranged in a one-to-one correspondence with the single cells (1).

7. The new energy vehicle battery pack according to claim 1, characterized in that: A plurality of the single cells (1) are connected in parallel, and the busbar (4) comprises a plate body (401) and a plurality of contact sheets (402). The contact sheets (402) protrude inwardly from the plate body (401) and contact the electrode sheets of the single cells (1).

8. The new energy vehicle battery pack according to claim 7, characterized in that: An insulating protection plate (5) having a consistent appearance is disposed outside the busbar (4).

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