Battery core cooling heat pipe structure in battery pack

Abstract

The utility model discloses a cooling heat pipe structure for battery cells in a battery pack. The cooling heat pipe structure comprises a box body, the cooling liquid is arranged in the box body; the evaporation section is arranged at the first end of the box body; the middle channel is arranged near the middle part of the box body; the condensation section is arranged at the second end of the box body; the cover plate can cover the box body; the battery cells are installed on the cover plate, parts of a whole vehicle for cooling the battery pack are omitted, the temperature of the battery cells in the battery pack can be controlled within the optimal working range through internal circulation of the battery pack, and the structure is simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and in particular relates to a heat pipe structure for cooling battery cells inside a battery pack. Background Art

[0002] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0003] The trend toward electrification is intensifying. Through policy guidance and support, my country has become the world's largest new energy vehicle market. As the most crucial component of electric vehicles, the battery pack also accounts for the largest portion of the cost per unit. Improving its performance and lifespan is essential. Battery performance determines its lifespan, with temperature being a key factor. Therefore, controlling the battery's operating and storage temperatures is crucial. Currently, complete vehicles typically utilize a complex structure comprised of numerous components, including a compressor, water pipes, condenser, and coolant, along with complex connections.

[0004] CN111630710B - Electric vehicle battery pack cooling system and electric vehicle battery pack system cooling method using electric vehicle battery pack cooling system, discloses an electric vehicle battery pack cooling system, including: a battery pack; a water-cooled cooling device; a thermoelectric element module installed between the refrigerant pipes of the water-cooled cooling device; a current sensor for detecting the intensity of the charging current to be supplied to the battery pack; and is also unable to solve the above technical problems. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a heat pipe structure for cooling the internal cells of a battery pack, eliminating the components of the entire vehicle that cool the battery pack. The internal circulation of the battery pack can control the temperature of the internal cells of the battery pack to be within the optimal working range, and the structure is simple.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a heat pipe structure for cooling the battery cells inside the battery pack, having:

[0007] Box body;

[0008] A coolant is disposed in the box body;

[0009] an evaporation section, disposed on the first end of the box body;

[0010] a middle channel, arranged near the middle of the box body;

[0011] a condensing section, disposed on the second end of the box body;

[0012] The cover plate can cover the box body; the battery cell is installed on the cover plate.

[0013] The intermediate channel includes a series of through-hole channels.

[0014] The box body and the cover plate are an integrated structure.

[0015] The length of the evaporation section is not less than the length of the battery core.

[0016] The box body is in a square shape, and the width of the evaporation section is adapted to the battery core.

[0017] The evaporation section and the condensation section are connected through an intermediate channel.

[0018] One of the above technical solutions has the following advantages or beneficial effects: the components of the vehicle that cool the battery pack are eliminated, and the internal circulation of the battery pack can control the temperature of the battery cells inside the battery pack to be within the optimal working range, and the structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the heat pipe structure for cooling the internal cells of the battery pack provided in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the heat pipe structure for cooling the battery cells inside the battery pack;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the heat pipe structure for cooling the battery cells inside the battery pack;

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the heat pipe structure for cooling the battery cells inside the battery pack;

[0023] The markings in the above figure are: 1. Box body, 11. Evaporation section, 12. Coolant, 13. Middle channel, 14. Condensation section, 2. Cover plate, 3. Battery cell. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1 to 4A heat pipe structure for cooling the battery cells 3 within a battery pack comprises: a housing 1; a coolant 12 disposed within the housing 1; an evaporation section 11 disposed at a first end of the housing 1; a central channel 13 disposed near the middle of the housing 1; a condensation section 14 disposed at a second end of the housing 1; and a cover 2 capable of covering the housing 1. The battery cells 3 are mounted on the cover 2. When the battery is operating, it generates heat, which heats the evaporation section 11 of the heat pipe. The working fluid within the heat pipe evaporates, carrying away heat (the latent heat of evaporation) as it evaporates. The vapor flows from the central channel to the condensation section 14 of the heat pipe, condensing into liquid while releasing latent heat. Capillary forces cause the liquid to flow back to the evaporation section 11.

[0026] The intermediate channel 13 includes a series of through-hole channels, which can be more conducive to the cooling, liquefaction and condensation of steam.

[0027] The box body 1 and the cover plate 2 are an integrated structure, which plays a sealing role to prevent the coolant 12 from leaking.

[0028] The length of the evaporation section 11 is not less than the length of the battery core 3 , and the evaporation section 11 can fully contact the battery core 3 to absorb the heat of the battery core 3 .

[0029] The box body 1 is square in shape, and the width of the evaporation section 11 is adapted to the battery core 3 . The evaporation section 11 can fully contact the battery core 3 to absorb the heat of the battery core 3 .

[0030] The evaporation section 11 and the condensation section 14 are connected through the middle channel 13. The steam flows from the central channel to the condensation section 14 of the heat pipe, condenses into liquid, and releases latent heat at the same time. Under the action of capillary force, the liquid flows back to the evaporation section 11.

[0031] Working process: When the battery is working, it generates heat, which heats the evaporation section of the heat pipe. The working fluid in the tube core evaporates due to the heat and takes away the heat. This heat is the latent heat of evaporation of the working fluid. The steam flows from the central channel to the condensation section of the heat pipe, condenses into liquid, and releases latent heat at the same time. Under the action of capillary force, the liquid flows back to the evaporation section.

[0032] This cooling heat pipe structure is divided into an evaporation section, a liquid section, a condensation section, and an intermediate channel, without multiple and complex other components.

[0033] After adopting the above structure, the components of the vehicle that cool the battery pack are eliminated, and the internal circulation of the battery pack can control the temperature of the battery cells inside the battery pack to be in the optimal working range, with a simple structure.

[0034] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 cannot be understood as a limitation on the present invention.

[0035] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat pipe structure for cooling cells inside a battery pack, characterized in that: have: Box body; A coolant is disposed in the box body; an evaporation section, disposed on the first end of the box body; a middle channel, arranged near the middle of the box body; a condensing section, disposed on the second end of the box body; The cover plate can cover the box body; the battery cell is installed on the cover plate.

2. The heat pipe structure for cooling the internal cells of a battery pack according to claim 1, wherein: The intermediate channel includes a series of through-hole channels.

3. The heat pipe structure for cooling the internal cells of a battery pack according to claim 2, wherein: The box body and the cover plate are an integrated structure.

4. The heat pipe structure for cooling the internal cells of a battery pack according to claim 3, wherein: The length of the evaporation section is not less than the length of the battery core.

5. The heat pipe structure for cooling the internal cells of a battery pack according to claim 4, wherein: The box body is in a square shape, and the width of the evaporation section is adapted to the battery core.

6. The heat pipe structure for cooling the internal cells of the battery pack according to claim 5, characterized in that: The evaporation section and the condensation section are connected through an intermediate channel.

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