Internal heat dissipation mechanism of lithium battery pack

Abstract

The utility model relates to the technical field of battery pack heat dissipation, in particular to an internal heat dissipation mechanism of a lithium battery pack, which comprises a battery rack, the battery rack is hollow, one end of the battery rack is communicated with a water cooling box, the water cooling box is filled with water cooling liquid, and the water cooling liquid is guided in through a micro pump communicated with an inlet of the battery rack. The battery flows back into the water cooling box from an outlet of the battery rack, a controller is fixedly connected to the center of the outer side of the water cooling box, heat dissipation fins are arranged on the two sides of the controller at equal intervals and integrated on the water cooling box, and a fan is fixedly connected to the outer sides of the heat dissipation fins. The utility model aims to provide the internal heat dissipation mechanism of the lithium battery pack, and aims to solve the problem of efficient heat dissipation in the lithium battery pack, so that internal heat is quickly led out, the heat loss of the battery is reduced, and a good power supply environment is created for the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack heat dissipation, in particular to an internal heat dissipation mechanism of a lithium battery pack. Background Art

[0002] A battery pack is an integral unit assembled from multiple battery modules and is used to store and provide electrical energy.

[0003] Lithium batteries, which are currently the mainstream in the market, are usually powered by a lithium battery pack assembled from several lithium battery units in order to obtain a larger capacity. However, due to the large number and density of batteries in the battery pack, a large amount of heat is generated during use, resulting in large heat loss. Therefore, how to efficiently dissipate heat inside the pack is an urgent problem to be solved. Utility Model Content

[0004] The purpose of the utility model is to provide an internal heat dissipation mechanism for a lithium battery pack, aiming to solve the problem of efficient heat dissipation inside the lithium battery pack, so as to quickly extract the internal heat, reduce the heat loss of the battery, and create a good power supply environment for the battery.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A lithium battery pack internal heat dissipation mechanism comprises a battery rack, wherein the battery rack is hollow in design and one end is connected to a water cooling box, the interior of the water cooling box is filled with water cooling liquid, the water cooling liquid is introduced by a micro pump connected to the inlet of the battery rack, and flows back into the water cooling box from the outlet of the battery rack, a controller is fixedly connected to the center of the outer side of the water cooling box, cooling fins are equidistantly arranged on both sides of the controller, the cooling fins are integrated on the water cooling box, and a fan is fixedly connected to the outer side of the cooling fins.

[0007] Preferably, the micro pump is located inside the water cooling box, and the battery rack is designed with liquid inlet on both sides and liquid outlet in the middle.

[0008] Preferably, a liquid injection port is provided at the top center of the water cooling box, and a sealing plug is provided on the liquid injection port.

[0009] Preferably, a plurality of lithium batteries are fixedly connected to the battery rack, a lithium battery pack shell is mounted on the outer side of the battery rack, and through holes are provided on the surface of the lithium battery pack shell at positions corresponding to the ends of the heat dissipation fins and the top of the controller.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] In the utility model, a battery rack with a hollow design is used, and the lithium battery is installed on the battery rack in an embedded manner with three sides wrapped thereon, and a water cooling box connected to one end of the battery rack and an internal micro pump and water cooling liquid are used to achieve water cooling and heat conduction of the lithium battery. Then, the heat dissipated by the water cooling is quickly diffused to the external environment by the heat dissipation fins and fan on the outside of the water cooling box, thereby achieving efficient heat dissipation of the lithium battery pack, reducing battery heat loss, and creating a good power supply environment for the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a heat dissipation mechanism inside a lithium battery pack of the utility model;

[0013] Figure 2 This is a diagram of a state where the fan of the internal heat dissipation mechanism of a lithium battery pack of the utility model is removed;

[0014] Figure 3 This is a side view of the interior of a water-cooling box of an internal heat dissipation mechanism of a lithium battery pack of the utility model;

[0015] Figure 4 This is a distribution diagram of the inlet and outlet of a heat dissipation mechanism inside a lithium battery pack of the utility model;

[0016] Figure 5 A side cross-sectional view of a battery rack of a lithium battery pack internal heat dissipation mechanism of the utility model;

[0017] Figure 6 This is a lithium battery installation state diagram of a lithium battery pack internal heat dissipation mechanism of the utility model;

[0018] Figure 7 The utility model is a schematic diagram of the structure of a lithium battery pack with an internal heat dissipation mechanism of the lithium battery pack.

[0019] In the figure: 1. battery rack; 101. inlet; 102. outlet; 2. water cooling box; 3. water cooling liquid; 4. micro pump; 5. controller; 6. cooling fins; 7. fan; 8. liquid filling port; 9. lithium battery; 10. lithium battery pack shell; 11. through hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-7 , the utility model provides a technical solution:

[0022] A heat dissipation mechanism inside a lithium battery pack comprises a battery rack 1 for mounting and fixing lithium batteries inside the lithium battery pack; the battery rack 1 is hollow in design and is connected to a water cooling box 2 at one end; the interior of the water cooling box 2 is filled with a water cooling liquid 3; the water cooling liquid 3 is introduced by a micro pump 4 connected to an inlet 101 of the battery rack 1, and flows back to the water cooling box 2 from an outlet 102 of the battery rack 1; the water cooling liquid in the water cooling box is introduced into a hollow cavity inside the battery rack by the micro pump, and then flows back to the water cooling box, so as to realize the heat dissipation of each battery inside the lithium battery pack; a controller 5 is fixedly connected to the center of the outer side of the water cooling box 2 for controlling the opening and closing of the micro pump; heat dissipation fins 6 are equidistantly arranged on both sides of the controller 5, and the heat dissipation fins 6 are integrated on the water cooling box 2 to increase the heat exchange area; a fan 7 is fixedly connected to the outer side of the heat dissipation fins 6 to accelerate air circulation and improve heat exchange efficiency to meet efficient air cooling and heat dissipation.

[0023] In this embodiment, see Figure 3 , Figure 4 The micro pump 4 is located inside the water cooling box 2, and the battery rack 1 is designed with liquid inlet on both sides and liquid outlet in the middle, which meets the design requirements of the water cooling structure.

[0024] In this embodiment, see Figure 1 A liquid filling port 8 is provided at the top center of the water cooling box 2, and a sealing plug is provided on the liquid filling port 8 to facilitate the filling and replenishment of water cooling liquid.

[0025] In this embodiment, see Figure 6 , Figure 7 A plurality of lithium batteries 9 are fixedly connected to the battery rack 1, and a lithium battery pack shell 10 is mounted on the outer side of the battery rack 1 to meet the structural design requirements of the lithium battery pack; through holes 11 are provided on the surface of the lithium battery pack shell 10 and at positions corresponding to the ends of the heat dissipation fins 6 and the top of the controller 5 to facilitate air flow and controller operation.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation mechanism inside a lithium battery pack, characterized in that: The invention comprises a battery rack (1), wherein the battery rack (1) is hollow in design and one end of the battery rack (1) is connected to a water cooling box (2), the interior of the water cooling box (2) is filled with water cooling liquid (3), the water cooling liquid (3) is introduced by a micro pump (4) connected to an inlet (101) of the battery rack (1), and flows back into the water cooling box (2) from an outlet (102) of the battery rack (1), a controller (5) is fixedly connected to the center of the outer side of the water cooling box (2), heat dissipation fins (6) are equidistantly arranged on both sides of the controller (5), the heat dissipation fins (6) are integrated on the water cooling box (2), and a fan (7) is fixedly connected to the outer side of the heat dissipation fins (6).

2. The internal heat dissipation mechanism of a lithium battery pack according to claim 1, characterized in that: The micro pump (4) is located inside the water cooling box (2), and the battery rack (1) is designed with liquid inlet on both sides and liquid outlet in the middle.

3. The internal heat dissipation mechanism of a lithium battery pack according to claim 1, characterized in that: A liquid injection port (8) is provided at the top center of the water cooling box (2), and a sealing plug is provided on the liquid injection port (8).

4. The internal heat dissipation mechanism of a lithium battery pack according to claim 3, characterized in that: A plurality of lithium batteries (9) are fixedly connected to the battery rack (1), a lithium battery pack shell (10) is mounted on the outer side of the battery rack (1), and through holes (11) are provided on the surface of the lithium battery pack shell (10) at positions corresponding to the ends of the heat dissipation fins (6) and the top of the controller (5).

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