A structure for improving energy density of a battery pack

Abstract

The application discloses a structure for improving energy density of a battery pack, which comprises a support body and uniformly arranged cell placing through holes arranged on the support body, and cells are arranged in the cell placing through holes; both ends of the cell are provided with upper and lower nickel sheets, and the outer sides of the upper and lower nickel sheets are provided with insulating sheets; the insulating sheets are fixed on the outer sides of the upper and lower nickel sheets through bolts penetrating through the support body. The application greatly reduces the overall quality of the battery pack through the single support fixed mode, and greatly utilizes the limited space for fixing the battery pack through the special position arrangement of the protection columns and the fixing columns, so that the electric energy storage density in the unit mass of the battery pack is greatly improved, the running vehicle weight of the whole machine vehicle is greatly reduced, and the driving mileage of the user is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery, especially to a structure for improving the energy density of battery pack. BACKGROUND

[0002] With the progress and development of society, the intelligence of storage, family, travel and the diversification of mobile consumer electronics, batteries as a provider of clean energy, make it more and more popular and favored by consumers, become an indispensable part of electronic products.

[0003] In the application process, as the output end of energy, by reducing the mass of the battery pack in unit volume, improving the electric quantity in unit mass, providing weight reduction for the running time of the whole machine, it is an effective form to improve the operation of the vehicle, providing more secure service for users in the use process, improving the user recognition, becoming a very meaningful research topic. The prior art usually adopts two supports to fix the cylindrical battery, the weight in unit volume is relatively high, which increases the weight of the battery pack and reduces the energy density of the battery pack. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a structure for improving the energy density of the battery pack, which is stable in structure and has high energy density.

[0005] The present application is realized by the following way:

[0006] A structure for improving the energy density of the battery pack, comprising a support body 1 and a plurality of cell placing through holes 11 arranged uniformly on the support body 1, wherein an electric core 2 is arranged in each cell placing through hole 11; the two ends of the electric core 2 are provided with an upper nickel sheet 4 and a lower nickel sheet 5, and the outer sides of the upper nickel sheet 4 and the lower nickel sheet 5 are provided with an insulating sheet 6; the insulating sheet 6 is fixed on the outer sides of the upper nickel sheet 4 and the lower nickel sheet 5 by a bolt penetrating through the support body 1, characterized in that: the support body 1 comprises a support frame 12 and a plurality of protective columns 13 arranged uniformly on the two ends of the support frame 12; the cell placing through holes 11 are arranged uniformly on the support frame 12; the cell placing through holes 11 are circular through holes matched with the electric core 2; the protective columns 13 are arranged on the periphery of the support frame 12; the contact surface of the protective column 13 and the support frame 12 forms a geometric figure which is tangent to the outer side of at least one cell placing through hole 11; a plurality of fixing columns 3 are formed in the middle of the support frame 12 and extend to both ends; a through hole 31 is arranged in the center of the fixing column 3.

[0007] Further, a limiting groove 14 is arranged longitudinally on the outer side of the protective column 13.

[0008] Further, a bending sheet 9 is arranged on one side of the upper nickel sheet 4 and the lower nickel sheet 5.

[0009] Further, the top of the guard column 13 is provided with a positioning height limiting column 15; the corresponding positions of the insulating sheet 6, the upper nickel sheet 4 and the lower nickel sheet 5 are provided with positioning holes matched with the positioning height limiting column 15.

[0010] Further, the outer side surface of the positioning height limiting column 15 is flush with the outer side surface of the insulating sheet.

[0011] Further, the sum of the height of the support frame 12 and the height of the guard column 13 arranged at both ends of the support frame 12 is equal to the height of the battery cell 2.

[0012] Further, the contact surface of the guard column 13 and the support frame 12 forms a geometric figure tangent to the outer side of two adjacent battery cell placement through holes 11.

[0013] Further, the contact surface of the fixed column 3 and the support frame 12 forms a circle tangent to the outer side of four battery cell placement through holes 11.

[0014] Further, the bolt comprises a screw rod 7 and a nut 8; the screw rod 7 is fixedly connected with the nut 8 at the bottom through the corresponding through holes of the insulating sheet 6, the upper nickel sheet 4 and the lower nickel sheet 5 and the through hole 31.

[0015] Further, the positive electrode end surface of the battery cell 2 is provided with highland barley paper.

[0016] The beneficial effects of the present application are that: through the single support fixed mode, the overall quality of the battery pack is greatly reduced, and through the special position setting of the guard column and the fixed column, the limited space is greatly utilized for fixing the battery pack, the electric energy storage density in the unit mass of the battery pack is greatly improved, the running vehicle weight of the whole machine vehicle is greatly reduced, and the user driving mileage is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0018] Fig. 1 The structure explosion diagram of the present application;

[0019] Fig. 2 The schematic diagram of the main support structure of the present application; DETAILED DESCRIPTION

[0020] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall into the scope of the protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall into the scope of the protection of the present application.

[0021] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Embodiment:

[0024] As Figs. 1-2As shown, a structure for improving the energy density of a battery pack includes a support body 1 and a plurality of cell placement through holes 11 arranged uniformly on the support body 1, and a cell 2 is arranged in each cell placement through hole 11; the cell 2 is provided with an upper nickel sheet 4 and a lower nickel sheet 5 at two ends thereof, and an insulating sheet 6 is arranged on the outer side of each of the upper nickel sheet 4 and the lower nickel sheet 5; the insulating sheet 6 is fixed on the outer side of each of the upper nickel sheet 4 and the lower nickel sheet 5 by means of a bolt penetrating through the support body 1; the support body 1 includes a support frame 12 and a plurality of protective columns 13 arranged uniformly at two ends of the support frame 12; the cell placement through holes 11 are arranged uniformly on the support frame 12; each cell placement through hole 11 is a circular through hole matched with the cell 2; the protective columns 13 are arranged on the periphery of the support frame 12; a contact surface of each protective column 13 and the support frame 12 forms a geometric figure which is tangent to the outer side of at least one cell placement through hole 11; a plurality of fixing columns 3 are formed in the support frame 12 and extend from the middle part of the support frame 12 to both ends thereof; and a through hole 31 is arranged in the center of each fixing column 3.

[0025] In an embodiment of the present application, a limiting groove 14 is arranged longitudinally on the outer side of each protective column 13.

[0026] In an embodiment of the present application, a bending sheet 9 is arranged on one side of each of the upper nickel sheet 4 and the lower nickel sheet 5.

[0027] In an embodiment of the present application, a positioning height-limiting column 15 is arranged on the top of each protective column 13; and a positioning hole matched with the positioning height-limiting column 15 is arranged on the corresponding position of each of the insulating sheet 6, the upper nickel sheet 4 and the lower nickel sheet 5.

[0028] In an embodiment of the present application, the outer side of the positioning height-limiting column 15 is flush with the outer side of the insulating sheet.

[0029] In an embodiment of the present application, the sum of the height of the support frame 12 and the height of the protective column 13 arranged at both ends of the support frame 12 is equal to the height of the cell 2.

[0030] In an embodiment of the present application, the contact surface of each protective column 13 and the support frame 12 forms a geometric figure which is tangent to the outer side of two adjacent cell placement through holes 11.

[0031] In an embodiment of the present application, the contact surface of each fixing column 3 and the support frame 12 forms a circle which is tangent to the outer side of four cell placement through holes 11.

[0032] In an embodiment of the present application, the bolt includes a screw rod 7 and a nut 8; the screw rod 7 is fixedly connected with the nut 8 at the bottom through the through holes in the corresponding positions of the insulating sheet 6, the upper nickel sheet 4 and the lower nickel sheet 5 and the through hole 31.

[0033] In an embodiment of the present application, a barley paper is arranged on the positive electrode end surface of the cell 2.

[0034] The application greatly reduces the overall quality of the battery pack through single support fixation, greatly utilizes the limited space for fixing the battery pack through the special position setting of the protection column and the fixing column, greatly improves the electric energy storage density in the unit mass of the battery pack, greatly reduces the running vehicle weight of the whole vehicle, and further improves the farther user driving mileage.

[0035] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A structure for improving the energy density of a battery pack, comprising a bracket body (1) and battery cell placement through holes (11) uniformly arranged on the bracket body (1), wherein a battery cell (2) is arranged in the battery cell placement through hole (11); an upper nickel sheet (4) and a lower nickel sheet (5) are provided at both ends of the battery cell (2), and an insulating sheet (6) is provided on the outer sides of the upper nickel sheet (4) and the lower nickel sheet (5); the insulating sheet (6) is fixed on the outer sides of the upper nickel sheet (4) and the lower nickel sheet (5) by bolts penetrating the bracket body (1), and is characterized in that: The support body (1) comprises a support frame (12) and a plurality of protective columns (13) evenly arranged at both ends of the support frame (12); the battery cell placement through holes (11) are evenly arranged on the support frame (12); the battery cell placement through holes (11) are circular through holes that match the battery cells (2); the protective columns (13) are arranged on the periphery of the support frame (12); the geometric figure formed by the contact surface of the protective columns (13) and the support frame (12) is tangent to the outer side of at least one battery cell placement through hole (11); the middle of the support frame (12) A plurality of fixing columns (3) are formed extending toward both ends; a through hole (31) is provided at the center of the fixing column (3); a positioning height limiting column (15) is provided at the top of the protective column (13); corresponding positions on the insulating sheet (6), the upper nickel sheet (4), and the lower nickel sheet (5) are all provided with positioning holes that cooperate with the positioning height limiting columns (15); the outer side surface of the positioning height limiting column (15) is flush with the outer side surface of the insulating sheet; the sum of the heights of the support frame (12) and the protective columns (13) provided at both ends of the support frame (12) is equal to the height of the battery cell (2).

2. The structure for improving the energy density of a battery pack according to claim 1, characterized in that: A limiting groove (14) is longitudinally provided on the outer side of the protective column (13).

3. The structure for improving the energy density of a battery pack according to claim 1, characterized in that: A bending sheet (9) is provided on one side of the upper nickel sheet (4) and the lower nickel sheet (5).

4. The structure for improving the energy density of a battery pack according to claim 1, characterized in that: The geometric figure formed by the contact surface of the protective column (13) and the support frame (12) is tangent to the outer sides of two adjacent battery cell placement through holes (11).

5. The structure for improving the energy density of a battery pack according to claim 1, characterized in that: The circle formed by the contact surface of the fixing column (3) and the support frame (12) is tangent to the outer sides of the four battery cell placement through holes (11).

6. The structure for improving the energy density of a battery pack according to claim 1, characterized in that: The bolt comprises a screw rod (7) and a nut (8); the screw rod (7) passes through corresponding through holes and through holes (31) on the insulating sheet (6), the upper nickel sheet (4), and the lower nickel sheet (5) and is fixedly connected to the nut (8) at the bottom.

7. The structure for improving the energy density of a battery pack according to claim 1, characterized in that: The positive terminal surface of the battery cell (2) is provided with highland barley paper.

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