Connection structure of current collector and battery pack side cold plate

Abstract

The utility model discloses a connecting structure of a current collector and a side cold plate of a battery pack, which comprises a harmonica-type liquid cooling plate and a current collector main body, a metal framework is embedded in a connecting end of the current collector main body, the harmonica-type liquid cooling plate is arranged in the metal framework, and the harmonica-type liquid cooling plate is connected with the current collector main body. And the harmonica-type liquid cooling plate and the metal framework are fixed and sealed through a connecting piece. Thus, the structural strength of connection can be guaranteed, high-frequency induction welding is not needed, and the machining cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a connection structure between a current collector and a cold plate on a side of a battery pack. Background Art

[0002] At present, battery cooling mainly adopts two methods: air cooling and liquid cooling. Among them, liquid cooling is more effective. Generally, a cooling plate is used to conduct coolant to contact the battery cells. Specifically, the side cold plates of the battery pack are mostly harmonica tube-type liquid cooling plates (harmonica tube-type liquid cooling plates have low cost, light weight, relatively simple structure, and high production efficiency). The existing harmonica tube-type liquid cooling plates are made of metal, and the current collector is a machined part. The current collector and the harmonica tube-type liquid cooling plate are welded by high-frequency induction welding, which is relatively expensive. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a connection structure between a current collector and a cold plate on the side of a battery pack.

[0004] The present invention proposes a connection structure between a current collector and a side cold plate of a battery pack, comprising a harmonica-shaped liquid cooling plate and a current collector body. A metal frame is embedded in the connection end of the current collector body, the harmonica-shaped liquid cooling plate is inserted into the metal frame, and the harmonica-shaped liquid cooling plate and the metal frame are fixed and sealed by a connecting piece.

[0005] Preferably, the current collector body and the metal skeleton are configured as an integral injection-molded structure.

[0006] Preferably, the metal skeleton is made of stainless steel.

[0007] Preferably, the connecting piece is made of hydrolysis-resistant glue.

[0008] Preferably, a limiting hole is further provided inside the current collector body at the rear side of the harmonica-type liquid cooling plate, and the diameter of the limiting hole is smaller than the thickness of the harmonica-type liquid cooling plate.

[0009] Preferably, the current collector body is made of plastic.

[0010] In summary, the present invention offers the following advantages: a metal frame is embedded within the connection end of the current collector body, and the harmonica-shaped liquid cooling plate is then placed within the metal frame and secured and sealed using connectors. This ensures structural strength while eliminating the need for high-frequency induction welding, significantly reducing processing costs.

[0011] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a partial three-dimensional structural diagram of the connection structure between the current collector and the cold plate on the side of the battery pack according to an embodiment of the utility model;

[0013] Figure 2 This is a partial cross-sectional view of the connection structure between the current collector and the cold plate on the side of the battery pack according to an embodiment of the present invention.

[0014] In the picture:

[0015] 1. Harmonica-style liquid cooling plate; 2. Current collector body; 3. Metal frame; 4. Hydrolysis-resistant glue; 5. Limiting holes. DETAILED DESCRIPTION

[0016] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols 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 should not be construed as limiting the present invention.

[0017] like Figure 1-2 As shown, the present embodiment proposes a connection structure between a current collector and a side cold plate of a battery pack, comprising a harmonica-shaped liquid cooling plate 1 and a current collector body 2, wherein a metal skeleton 3 is embedded in the connection end of the current collector body 2, the harmonica-shaped liquid cooling plate 1 is inserted into the metal skeleton 3, and the harmonica-shaped liquid cooling plate 1 and the metal skeleton 3 are fixed and sealed by a connecting piece.

[0018] Specifically, the connecting piece is configured as hydrolysis-resistant glue 4 , and the gap between the harmonica-shaped liquid cooling plate 1 and the metal frame 3 is sealed by filling with the hydrolysis-resistant glue 4 .

[0019] Furthermore, the metal skeleton 3 is made of stainless steel, specifically, 304 stainless steel (resistant to high temperatures of 800°C, with good processing performance, high toughness, good corrosion resistance, heat resistance, low temperature strength, and good hot workability such as stamping and bending, and no heat treatment hardening phenomenon, etc.).

[0020] The current collector body 2 is made of plastic, specifically PA66+GF30 (PA66 plastic material plus 30% glass fiber, which has high strength, special thermal stability, and hydrolysis resistance). The harmonica-type liquid cooling plate 1 currently mostly uses AL3003 (AL3003 is an aluminum alloy with manganese as the main alloying element) as a metal material. Since the metal harmonica-type liquid cooling plate 1 is easily loosely bonded to the plastic current collector body 2 by glue, and may also cause glue leakage. Therefore, it is necessary to embed a metal skeleton 3 inside the connecting end of the current collector body 2. The gap between the metal skeleton 3 and the metal harmonica-type liquid cooling plate 1 can be sealed by glue, which is firm and convenient to bond and has a good sealing effect.

[0021] In this way, the metal frame 3 is embedded inside the connection end of the current collector body 2, and the harmonica-shaped liquid cooling plate 1 is then placed into the metal frame 3 and fixed and sealed with connectors. This ensures the structural strength of the connection while eliminating the need for high-frequency induction welding, greatly reducing processing costs.

[0022] Furthermore, in order to simplify the processing technology and improve the processing efficiency, the current collector body 2 and the metal skeleton 3 are configured as an injection-molded integrated structure.

[0023] Furthermore, if Figure 2 As shown, a limiting hole 5 is provided inside the current collector body 2 at the rear side of the harmonica-type liquid cooling plate 1 , and the diameter of the limiting hole 5 is smaller than the thickness of the harmonica-type liquid cooling plate, so as to limit the connection position of the harmonica-type liquid cooling plate 1 .

[0024] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A connection structure between a current collector and a side cold plate of a battery pack, comprising a harmonica-shaped liquid cold plate and a current collector body, characterized in that: A metal frame is embedded in the connection end of the current collector body, the harmonica-shaped liquid cooling plate is placed in the metal frame, and the harmonica-shaped liquid cooling plate and the metal frame are fixed and sealed by a connecting piece.

2. The connection structure between the current collector and the cold plate on the side of the battery pack according to claim 1, characterized in that: The current collector body and the metal skeleton are configured as an integral injection-molded structure.

3. The connection structure between the current collector and the side cold plate of the battery pack according to claim 1, characterized in that: The metal frame is made of stainless steel.

4. The connection structure between the current collector and the cold plate on the side of the battery pack according to claim 1, characterized in that: The connecting piece is made of hydrolysis-resistant glue.

5. The connection structure between the current collector and the cold plate on the side of the battery pack according to claim 1, characterized in that: A limiting hole is further provided inside the current collector body at the rear side of the harmonica-type liquid cooling plate, and the diameter of the limiting hole is smaller than the thickness of the harmonica-type liquid cooling plate.

6. The connection structure between the current collector and the cold plate on the side of the battery pack according to claim 1, characterized in that: The current collector body is made of plastic.

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