Heat dissipation structure in battery pack

Abstract

The utility model discloses a heat dissipation structure in a battery pack, which comprises a bottom plate and a box body, the box body and the bottom plate are spliced and fixed up and down, a battery pack inner module and a flow channel heat dissipation pipe are arranged in a space formed by the box body and the bottom plate, the flow channel heat dissipation pipe is used for conveying cooling liquid, a plurality of fins protruding outwards are uniformly distributed on the pipe wall of the flow channel heat dissipation pipe, and the fins are arranged in the flow channel heat dissipation pipe. The fins extend in the length direction of the flow channel heat dissipation pipes, and the inner side spaces of the fins communicate with the inner side spaces of the flow channel heat dissipation pipes. Wherein the multiple fins are evenly distributed on the pipe wall of the flow channel heat dissipation pipe, the fins protrude outwards, so that the heat exchange face of the flow channel heat dissipation pipe is enlarged, the inner side space of the flow channel heat dissipation pipe and the inner side space of the fins are filled with cooling liquid in the flow channel heat dissipation pipe at the same time, and the heat dissipation efficiency is improved. The heat exchange efficiency of the flow channel heat dissipation pipes and the inner space of the box body is effectively improved, meanwhile, the flow channel heat dissipation pipes do not occupy much space, and the technical characteristics of being compact in structure, easy to arrange and the like are achieved.

Description

Technical Field

[0001] The utility model relates to a battery pack, in particular to a heat dissipation structure inside a battery pack. Background Art

[0002] With the continuous consumption of non-renewable resources, the development space of energy storage technology is getting larger and larger. In practical applications, electrochemical energy storage should be based on safety. Therefore, the temperature control problem of the battery pack is an important technical point. In the prior art, the temperature inside the common battery pack is generally controlled by air cooling or liquid cooling. Among them, the air cooling method has the defect of low cooling efficiency, and the existing liquid cooling method also has the defect that the contact area between the liquid cooling channel and the internal space of the battery pack is small, and there is still the technical problem of insufficient heat exchange efficiency. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a heat dissipation structure inside a battery pack with high heat dissipation efficiency and compact structure in view of the deficiencies of the prior art.

[0004] To solve the above technical problem, the utility model adopts the following technical scheme.

[0005] A heat dissipation structure inside a battery pack includes a bottom plate and a box body. The box body is fixedly assembled with the bottom plate up and down. Inside the space formed by the box body and the bottom plate, there are an inner module of the battery pack and a flow channel heat dissipation pipe. The flow channel heat dissipation pipe is used for conveying a coolant. A plurality of outwardly protruding fins are evenly distributed on the pipe wall of the flow channel heat dissipation pipe. The fins extend along the length direction of the flow channel heat dissipation pipe. The inner space of the fins is communicated with the inner space of the flow channel heat dissipation pipe.

[0006] Preferably, the fins are in an inverted "V" shape, and the tip ends of the fins protrude outward.

[0007] Preferably, the flow channel heat dissipation pipe is bent in an "S" shape.

[0008] Preferably, there is a preset distance d between two adjacent fins.

[0009] Preferably, two through holes are provided on the side of the box body, and the two ends of the flow channel heat dissipation pipe respectively pass through the two through holes.

[0010] Preferably, the flow channel heat dissipation pipe is arranged on the top of the inner module of the battery pack.

[0011] In the internal heat dissipation structure of the battery pack disclosed by the present utility model, the box body and the bottom plate are assembled up and down to form the outer shell structure of the battery pack. Inside the internal space of the box body, an internal module of the battery pack and a flow channel heat dissipation pipe are installed. The flow channel heat dissipation pipe is used to convey a coolant, so as to exchange heat with the internal space of the box body. Among them, a plurality of fins are evenly distributed on the pipe wall of the flow channel heat dissipation pipe, and the fins protrude outward, thereby increasing the heat exchange surface of the flow channel heat dissipation pipe. And the coolant in the flow channel heat dissipation pipe fills both the inner space of the flow channel heat dissipation pipe and the inner space of the fins at the same time, effectively improving the heat exchange efficiency between the flow channel heat dissipation pipe and the internal space of the box body. At the same time, the flow channel heat dissipation pipe does not occupy much space and has technical characteristics such as a compact structure and easy layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is an exploded view of the internal heat dissipation structure of the battery pack of the present utility model;

[0013] Figure 2 is a perspective view of the flow channel heat dissipation pipe;

[0014] Figure 3 is a sectional view of the flow channel heat dissipation pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model will be described in more detail below with reference to the drawings and embodiments.

[0016] The present utility model discloses an internal heat dissipation structure of a battery pack. As shown in combination with Figures 1 to 3 it includes a bottom plate 1 and a box body 2. The box body 2 and the bottom plate 1 are fixedly assembled up and down. Inside the space formed by the box body 2 and the bottom plate 1, an internal module 3 of the battery pack and a flow channel heat dissipation pipe 4 are provided. The flow channel heat dissipation pipe 4 is used to convey a coolant. A plurality of outwardly protruding fins 40 are evenly distributed on the pipe wall of the flow channel heat dissipation pipe 4. The fins 40 extend along the length direction of the flow channel heat dissipation pipe 4. The inner space of the fins 40 is communicated with the inner space of the flow channel heat dissipation pipe 4.

[0017] In the above structure, the box body 2 and the bottom plate 1 are assembled up and down to form the outer shell structure of the battery pack. Inside the inner space of the box body, a battery pack inner module 3 and a flow channel heat dissipation pipe 4 are installed. The flow channel heat dissipation pipe 4 is used to convey a coolant, so as to exchange heat with the inner space of the box body. Among them, a plurality of fins 40 are evenly distributed on the pipe wall of the flow channel heat dissipation pipe 4, and the fins 40 protrude outward, thereby increasing the heat exchange surface of the flow channel heat dissipation pipe 4. And the coolant in the flow channel heat dissipation pipe 4 simultaneously fills the inner space of the flow channel heat dissipation pipe 4 and the inner space of the fins 40, effectively improving the heat exchange efficiency between the flow channel heat dissipation pipe 4 and the inner space of the box body. At the same time, the flow channel heat dissipation pipe 4 does not occupy much space and has technical characteristics such as a compact structure and easy layout.

[0018] As a preferred method, the fin 40 is in an inverted "V" shape, and the tip of the fin 40 protrudes outward. Among them, the inverted "V"-shaped fin 40 can not only extend into the inner space of the box body, but also be well combined with the flow channel heat dissipation pipe 4. In practical applications, the flow channel heat dissipation pipe 4 and the plurality of fins 40 are of an integral structure, and the two can be processed and formed by means such as welding and extrusion. This embodiment does not limit the specific processing method of the flow channel heat dissipation pipe 4 and the plurality of fins 40.

[0019] In order to fully bend the flow channel heat dissipation pipe 4, in this embodiment, the flow channel heat dissipation pipe 4 is bent in an "S" shape.

[0020] Furthermore, there is a preset distance d between two adjacent fins 40. Among them, by setting the distance d, a gap can be formed between two adjacent fins 40, and this gap can allow air flow to pass through to achieve efficient heat dissipation.

[0021] In this embodiment, two through holes 20 are provided on the side of the box body 2, and both ends of the flow channel heat dissipation pipe 4 pass through the two through holes 20 respectively. In practical applications, the flow channel heat dissipation pipes 4 in a plurality of battery packs can be connected in series in turn to form a complete coolant passage.

[0022] As a preferred method, the flow channel heat dissipation pipe 4 is arranged on the top of the battery pack inner module 3. However, in practical applications, it is not limited to this. According to actual needs, the flow channel heat dissipation pipe 4 can also be arranged on the side of the battery pack inner module 3.

[0023] In the heat dissipation structure inside the battery pack disclosed by the present utility model, the fin 40 is a structure that spreads outward relative to the flow channel heat dissipation pipe 4. This design of the heat dissipation fins spreading not only increases the heat dissipation area, but also optimizes the air flow path, which helps to form a better convective heat dissipation effect, enabling heat to be transferred from the battery module to the external environment faster, reducing the temperature inside the battery pack, and improving the working performance and safety reliability of the battery.

[0024] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements or improvements made within the technical scope of the present utility model shall be included within the scope protected by the present utility model.

Claims

1. A heat dissipation structure in a battery pack, characterized in that: The invention comprises a bottom plate (1) and a box body (2), wherein the box body (2) and the bottom plate (1) are assembled and fixed together in an upper and lower manner, and a battery pack module (3) and a flow channel heat dissipation pipe (4) are arranged in a space formed by the box body (2) and the bottom plate (1), and the flow channel heat dissipation pipe (4) is used to transport a cooling liquid, and a tube wall of the flow channel heat dissipation pipe (4) is evenly distributed with a plurality of fins (40) protruding outward, and the fins (40) extend along the length direction of the flow channel heat dissipation pipe (4), and the inner space of the fins (40) is connected with the inner space of the flow channel heat dissipation pipe (4).

2. The heat dissipation structure in the battery pack according to claim 1, characterized in that: The fin (40) is in an inverted "V" shape, and the tip of the fin (40) protrudes outward.

3. The heat dissipation structure in the battery pack according to claim 1, characterized in that: The flow channel heat dissipation pipe (4) is bent in an "S" shape.

4. The heat dissipation structure in the battery pack according to claim 1, characterized in that: There is a preset distance d between two adjacent fins (40).

5. The heat dissipation structure in the battery pack according to claim 1, characterized in that: Two through holes (20) are provided on the side of the box body (2), and the two ends of the flow channel heat dissipation pipe (4) pass through the two through holes (20) respectively.

6. The heat dissipation structure in the battery pack according to claim 1, characterized in that: The flow channel heat dissipation pipe (4) is arranged on the top of the battery pack inner module (3).

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