Air-cooled plug box with high energy density

Abstract

The utility model belongs to the technical field of air-cooled battery plug-in box structures, and discloses a high-energy-density air-cooled plug-in box, an end plate is arranged between one end of a battery cell and the inner wall of one end of a lower box body, the end plate comprises an upper end plate and a lower end plate, and an air duct is arranged on the upper end plate; a threaded hole is formed in the top of the lower end plate, a kidney-shaped hole is formed in the upper end plate, an extrusion connecting piece penetrates through the kidney-shaped hole, a limiting part abutting against the top face of the upper end plate is arranged at the upper end of the extrusion connecting piece, and the lower end of the extrusion connecting piece is connected into the threaded hole in a threaded mode. According to the utility model, the lower end of the extrusion connecting piece gradually extends into the threaded hole of the lower end plate, so that the upper end plate can be gradually pushed to the direction of the battery cell, further, the upper end plate can stably extrude the battery cell, provide extrusion force for the battery cell and ensure the stability of the battery cell, and a module-free subrack scheme is adopted, so that the tolerance requirement is ensured, and the production efficiency is improved. The end plates do not need to be replaced due to mismatching of the end plates, the cost is relatively low, installation is easy, and the working efficiency is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of air-cooled battery plug-in box structures, and in particular relates to an air-cooled plug-in box with high energy density. Background Art

[0002] Lithium-ion batteries, as a high-performance rechargeable battery, are widely used in mobile devices, electric vehicles and energy storage systems. Lithium-ion batteries have the advantages of high energy density, long cycle life, low self-discharge rate and light weight, providing power storage. The energy density of lithium-ion batteries has attracted much attention from the society. The higher the energy density, the more electrical energy can be stored per unit weight or volume.

[0003] In the prior art, in order to fill the limited internal space of the energy storage container with as many battery cells as possible and give full play to the performance of the battery cells, it is necessary to install an end plate at one end of the lower box body according to actual conditions, and use the end plate to squeeze the space between the battery cell and the lower box body, thereby enhancing the stability of the battery cell in the lower box body. However, in practice, when the end plate is inserted into the gap between one end of the battery cell and one end of the lower box body, the thickness of the end plate is likely to have a tolerance with the gap between one end of the battery cell and one end of the lower box body, and this method of inserting the end plate has extremely high tolerance requirements, which affects the actual operating efficiency and causes material waste. Utility Model Content

[0004] The utility model aims to provide an air-cooled plug-in box with high energy density, so as to solve the above problems existing in the prior art.

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

[0006] A high-energy-density air-cooled plug-in box comprises a lower box body filled with battery cells, an end plate is arranged between one end of the battery cell and the inner wall of one end of the lower box body, the end plate comprises an upper end plate and a lower end plate, and the upper end plate is provided with an air duct connecting the two sides thereof; a threaded hole is arranged on the top of the lower end plate, and a waist-shaped hole is arranged on the upper end plate, and the two ends of the waist-shaped hole are respectively facing one end of the battery cell and one end of the lower box body; an extrusion connector passes through the waist-shaped hole, and a limiting portion abutting against the top surface of the upper end plate is arranged on the upper end of the extrusion connector, and the lower end of the extrusion connector is threadedly connected to the threaded hole, and as the lower end of the extrusion connector gradually extends into the threaded hole, the limiting portion of the extrusion connector gradually squeezes the upper end plate toward the battery cell.

[0007] As a preferred technical solution in the utility model, the bottom surface of the upper end plate is slidably connected to the top surface of the lower end plate.

[0008] As a preferred technical solution in the utility model, the top surface of the lower end plate is a first inclined surface whose height gradually decreases from one end of the lower box body to one end of the battery cell, and the bottom surface of the upper end plate is a second inclined surface that fits the first inclined surface.

[0009] As a preferred technical solution in the present invention, the extruded connector is a bolt, and the limiting portion of the extruded connector is a nut end of the bolt.

[0010] As a preferred technical solution in the present invention, the top surface of the upper end plate is a planar structure.

[0011] As a preferred technical solution in the present invention, at least two long strip-shaped air ducts are arranged on the upper end plate.

[0012] As a preferred technical solution in the present invention, at least two extruded connectors are provided.

[0013] Beneficial effect: In actual operation, the utility model only needs to gradually extend the lower end of the extrusion connector into the threaded hole on the top of the lower end plate, and then the upper end plate can be gradually pushed toward the direction of the battery cell, so that the upper end plate can stably extrude the battery cell, provide extrusion force for the battery cell, and ensure the stability of the battery cell. It is a module-free plug-in box solution, which ensures the tolerance requirements, and the thickness of the end plate is allowed to change appropriately. There is no need to replace the end plate due to end plate mismatch. The cost is relatively low and the installation is simple, which ensures work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an explosion diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the assembly of the utility model;

[0016] Figure 3 It is an exploded schematic diagram of the middle end plate and the extruded connector of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the lower end plate in the utility model.

[0018] In the figure: 1-battery cell; 2-lower box; 3-end plate; 31-upper end plate; 32-lower end plate; 33-air duct; 34-threaded hole; 35-waist-shaped hole; 4-extrusion connector. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0020] Example:

[0021] like Figure 1-Figure 4 As shown, this embodiment provides a high energy density air-cooled plug-in box, including a lower box body 2 filled with battery cells 1, an end plate 3 is arranged between one end of the battery cell 1 and the inner wall of one end of the lower box body 2, the end plate 3 includes an upper end plate 31 and a lower end plate 32, and the upper end plate 31 is provided with an air duct 33 connecting the two sides thereof to ensure ventilation effect; a threaded hole 34 is arranged on the top of the lower end plate 32, and a waist-shaped hole 35 is arranged on the upper end plate 31, and the two ends of the waist-shaped hole 35 are respectively facing one end of the battery cell 1 and one end of the lower box body 2, and an extruded connector 4 is passed through the waist-shaped hole 35, so that the extruded connector 4 and the upper end plate 31 can be connected along the waist-shaped hole 34. The holes 35 move relatively, and the upper end of the extrusion connector 4 is provided with a limiting portion abutting against the top surface of the upper end plate 31, and the lower end of the extrusion connector 4 is threadedly connected to the threaded hole 34, and as the lower end of the extrusion connector 4 gradually extends into the threaded hole 34, the limiting portion of the extrusion connector 4 gradually squeezes the upper end plate 31 toward the battery cell 1. In practice, the lower end of the extrusion connector 4 is threadedly connected to the threaded hole 34, which ensures the stability of the extrusion connector 4. In this way, when the extrusion connector 4 extrudes the upper end plate 31, the stability of the upper end plate 31 can also be guaranteed at any time, thereby ensuring the extrusion effect of the upper end plate 31 on the battery cell 1 and the stability of the battery cell 1.

[0022] In actual operation, the utility model only needs to gradually extend the lower end of the extrusion connector 4 into the threaded hole 34 at the top of the lower end plate 32, so that the upper end plate 31 can be gradually pushed toward the direction of the battery cell 1, so that the upper end plate 31 can stably extrude the battery cell 1, provide an extrusion force for the battery cell 1, and ensure the stability of the battery cell 1. It is a module-free plug-in box solution, which ensures the tolerance requirements, and the thickness of the end plate 3 is allowed to change appropriately. There is no need to replace the end plate due to end plate mismatch. The cost is relatively low and the installation is simple, which ensures work efficiency.

[0023] As a preferred implementation scheme in this embodiment, it needs to be further explained that the bottom surface of the upper end plate 31 is slidably connected to the top surface of the lower end plate 32, ensuring that the upper end plate 31 can slide on the lower end plate 32 toward the battery cell 1 when squeezed by the extrusion connector 4.

[0024] As a preferred implementation scheme in this embodiment, it needs to be further explained that the top surface of the lower end plate 32 is a first inclined surface whose height gradually decreases from one end of the lower box body 2 to one end of the battery cell 1, and the bottom surface of the upper end plate 31 is a second inclined surface that fits the first inclined surface. Therefore, when the extrusion connector 4 squeezes the upper end plate 31, the upper end plate 31 can only slide gradually from the high point to the low point of the first inclined surface, and then slide in the direction of the battery cell 1, thereby ensuring the extrusion effect on the battery cell 1.

[0025] As a preferred implementation scheme in this embodiment, it needs to be further explained that the extruded connector 4 is a bolt, and the limiting portion of the extruded connector 4 is the nut end of the bolt. The equipment is simple and practical, and the cost is relatively low.

[0026] As a preferred implementation scheme in this embodiment, it needs to be further explained that the top surface of the upper end plate 31 is a planar structure. As the screw rod of the bolt penetrates into the threaded hole 34 of the lower end plate 32, the nut end of the bolt can be ensured to be stably squeezed against the upper end plate 31.

[0027] As a preferred implementation scheme in this embodiment, it needs to be further explained that at least two long air ducts 33 are provided on the upper end plate 31 to ensure ventilation effect.

[0028] As a preferred implementation scheme in this embodiment, it needs to be further explained that at least two extruded connectors 4 are provided to ensure the relative stability of the structure between the upper end plate 31 and the lower end plate 32 .

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high energy density air-cooled plug-in box, comprising a lower box (2) filled with battery cells (1), an end plate (3) being arranged between one end of the battery cell (1) and the inner wall of one end of the lower box (2), characterized in that: The end plate (3) comprises an upper end plate (31) and a lower end plate (32), the upper end plate (31) being provided with an air duct (33) communicating with both sides thereof; a threaded hole (34) being provided at the top of the lower end plate (32), and a waist-shaped hole (35) being provided on the upper end plate (31), the two ends of the waist-shaped hole (35) respectively facing one end of the battery cell (1) and one end of the lower box body (2); an extrusion connector (4) passing through the waist-shaped hole (35), and a limiting portion abutting against the top surface of the upper end plate (31) being provided at the upper end of the extrusion connector (4), the lower end of the extrusion connector (4) being threadedly connected in the threaded hole (34), and as the lower end of the extrusion connector (4) gradually extends into the threaded hole (34), the limiting portion of the extrusion connector (4) gradually extrudes the upper end plate (31) in the direction of the battery cell (1).

2. A high energy density air-cooled plug-in box according to claim 1, characterized in that: The bottom surface of the upper end plate (31) is slidably connected to the top surface of the lower end plate (32).

3. A high energy density air-cooled plug-in box according to claim 1 or 2, characterized in that: The top surface of the lower end plate (32) is a first inclined surface whose height gradually decreases from one end of the lower box body (2) to one end of the battery cell (1), and the bottom surface of the upper end plate (31) is a second inclined surface that fits the first inclined surface.

4. A high energy density air-cooled plug-in box according to claim 1 or 2, characterized in that: The extrusion connector (4) is a bolt, and the limiting portion of the extrusion connector (4) is the nut end of the bolt.

5. The high energy density air-cooled plug-in box according to claim 1, characterized in that: The top surface of the upper end plate (31) is a planar structure.

6. The high energy density air-cooled plug-in box according to claim 1, characterized in that: At least two long strip-shaped air ducts (33) are arranged on the upper end plate (31).

7. The high energy density air-cooled plug-in box according to claim 1, characterized in that: At least two extrusion connectors (4) are provided.

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