Snakelike liquid cooling plate blade battery cell module and installation method

Abstract

The snakelike liquid cooling plate blade battery cell module comprises a battery cell group composed of a plurality of blade battery cells, a liquid cooling plate and heat conduction plates are arranged in the battery cell group, and the heat conduction plates are arranged on the two sides of the liquid cooling plate; a series aluminum bar I and a series aluminum bar II are arranged at the two ends of the battery cell group; an upper side plate and a lower side plate are arranged at the upper end and the lower end of the battery cell group, battery cell end plates are arranged on the two sides of the battery cell group, and the upper side plate and the lower side plate are connected together through the side plates and the battery cell end plates; insulating seats for fixing positive and negative aluminum bars are arranged on the battery core end plates; and mylar films are arranged on the outer sides of the series aluminum bar I and the series aluminum bar II. The snakelike liquid cooling plates and the heat conduction plates are arranged between the blade cells, the blade cells are cooled through the snakelike liquid cooling plates, heat conduction and cooling are performed through the heat conduction plates arranged on the two sides, and the problems that after the blade cells are grouped, heat is generated, heat dissipation is not facilitated, and the performance and quality of the battery are affected are solved; the heat dissipation performance and the service life of the battery cell module are improved, and more possibilities are provided for the application of the lithium battery.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell modules, and in particular to a serpentine liquid cooling plate blade battery cell module and an installation method thereof. Background Art

[0002] With the transformation of the global energy structure, electric vehicles have been increasingly widely used around the world. As a core component of electric vehicles, the technical level and application prospects of lithium batteries have become the focus of attention. As a high-energy, long-life, and environmentally friendly battery, lithium batteries have become one of the most widely used battery types in the field of electric vehicles. In the field of electric vehicles, lithium batteries, as power batteries, are the core components of electric vehicles and directly determine the vehicle's range and power performance. At present, lithium-ion batteries are the most commonly used type of power batteries, which have the advantages of high energy density, long life, and environmental protection.

[0003] With the development of new energy, the requirements for lithium batteries are getting higher and higher. Compared with traditional VDA batteries, blade cells have higher energy density, are more compact and take up less space after being grouped. However, after being grouped, when the battery is discharged at a high rate, the battery cell will heat up violently, which is not conducive to heat dissipation, resulting in excessive battery temperature, which has a huge adverse effect on the battery life and performance. The cooling design of blade cells can solve the heating problem after grouping, extend the life of the battery cell, and help increase the life of the entire pack. Therefore, the cooling design of blade cells after grouping has become an important research direction. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a serpentine liquid cooling plate blade battery cell module with simple structure and good effect and an installation method.

[0005] The present invention is implemented with the following technical scheme: a serpentine liquid cooling plate blade battery cell module, comprising blade batteries, a plurality of the blade batteries are arranged side by side to form a battery cell group, a liquid cooling plate and a heat conducting plate are provided inside the battery cell group, and the heat conducting plate is arranged on both sides of the liquid cooling plate; series aluminum bars I and series aluminum bars II for connecting a plurality of blade batteries in series are provided at both ends of the battery cell group, and positive and negative aluminum bars are provided at both ends of the series aluminum bar I; upper side plates and lower side plates are provided at the upper and lower ends of the battery cell group, and battery end plates are provided on both sides of the battery cell group, and the upper and lower side plates are connected to the battery end plates through side plates; insulating seats for fixing positive and negative aluminum bars are provided on the battery cell end plates, and Mylar sheets are provided on the outside of the series aluminum bars I and II.

[0006] Furthermore, the liquid cooling plate is a serpentine cooling plate, which is composed of a plurality of U-shaped plates connected in series, and adjacent U-shaped plates are arranged side by side and connected end to end.

[0007] Two blade cells are placed between each U-shaped loop of the liquid cooling plate, and each of the blade cells is in contact with the serpentine liquid cooling plate.

[0008] The shape of the heat conducting plate is the same as that of the liquid cooling plate, and two heat conducting plates are arranged on both sides of the liquid cooling plate to assist in cooling.

[0009] The liquid cooling plate and the heat conducting plate are fixed on the battery cell group by means of heat conducting structural adhesive.

[0010] The upper side plate and the lower side plate are provided with through holes for exposing the ends of the liquid cooling plate and the heat conducting plate.

[0011] The side plates are bent plates on both sides of the upper side plate and the lower side plate, and the side plates are connected to the cell end plates through rivets.

[0012] The insulating seat is fixed on the battery cell end plate by screws.

[0013] A method for installing a serpentine liquid cooling plate blade battery module comprises the following steps: S1. Stack the blade cells in groups of two, insert the stacked blade cells into the U-shaped loop of the liquid cooling plate, and apply thermal conductive structural glue on the contact surface between the blade cells and the liquid cooling plate; S2. Insert the heat conducting plate from the positive and negative sides of the blade battery cell into the stacked battery cell group and apply heat conducting structural glue to fix it; S3, bonding the blade cells to the cell end plates and placing them at both ends of the cell group; S4, placing the stacked battery cell group on the lower side plate, then buckling the upper side plate on the upper side of the battery cell group, and finally connecting the upper side plate, the lower side plate and the battery cell end plate; S5. Fix the insulating seat on the side of the battery cell end plate; S6. Weld the series aluminum bar I and the series aluminum bar II to the positive and negative poles at both ends of the blade battery cells respectively, connect the adjacent blade batteries in series, and weld the positive and negative aluminum bars to the first and last blade batteries; S7. Stick the Mylar sheet on the surface of the series aluminum bars I and II for protection.

[0014] In step S1, the positive and negative electrodes of adjacent blade cells are arranged alternately.

[0015] The present invention has the following advantages: the serpentine liquid cooling plate blade battery cell module and installation method of the present invention, a serpentine liquid cooling plate and a heat conducting plate are provided between the blade batteries, the blade batteries are cooled by the serpentine liquid cooling plate, and heat conduction and cooling are performed by the heat conducting plates arranged on both sides, which solves the problems of heat generation after the blade batteries are grouped and heat dissipation is not conducive to affecting the performance and quality of the battery, improves the heat dissipation performance and service life of the battery cell module, and provides more possibilities for the application of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0017] In the attached picture: Figure 1 It is a structural schematic diagram of the battery module of the present invention; Figure 2 It is a schematic diagram of the explosion structure of the battery module of the present invention.

[0018] In the figure: 1. Blade battery cell, 2. Serpentine liquid cooling plate, 3. Battery cell end plate, 4. Side plate, 5. Heat conduction plate, 6. Mylar sheet, 7. Upper side plate, 8. Lower side plate, 9. Series aluminum bar I, 10. Positive and negative aluminum bars, 11. Series aluminum bar II, 12. Liquid cooling plate, 13. Screws, 14. Insulation seat, 15. Rivets.

[0019] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0021] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1 to Figure 2 A serpentine liquid cooling plate blade cell module is shown, comprising a blade cell 1, wherein a plurality of the blade cells 1 are arranged side by side to form a cell group, wherein a liquid cooling plate 2 and a heat conducting plate 5 are provided inside the cell group, wherein the heat conducting plate 5 is arranged on both sides of the liquid cooling plate 2; both ends of the cell group are provided with a series of aluminum bars Ⅰ9 and a series of aluminum bars Ⅱ11 for connecting a plurality of blade cells 1 in series, and both ends of the series of aluminum bars Ⅰ9 are provided with positive and negative aluminum bars 10; upper side plates 7 and lower side plates 8 are provided at the upper and lower ends of the cell group, and cell end plates 3 are provided on both sides of the cell group, wherein the upper side plates 7 and the lower side plates 8 are connected to the cell end plates 3 through side plates 4; an insulating seat 14 for fixing the positive and negative aluminum bars 10 is provided on the cell end plate 3, and Mylar sheets 6 are provided on the outer sides of the series of aluminum bars Ⅰ9 and the series of aluminum bars Ⅱ11. The serpentine liquid cooling plate blade battery module of the present invention is provided with a liquid cooling plate and a heat conducting plate between the blade batteries constituting the battery group. The liquid cooling plate is interspersed between the blade batteries to improve the heat dissipation performance of the blade batteries. The heat conducting plates are arranged on both sides of the cold liquid plate to play a role of heat conduction and cooling; multiple blade batteries are connected in series through the series aluminum row I and the series aluminum row II, and the positive and negative aluminum rows are welded on the two blade batteries at the head and tail to complete the assembly of the battery group; in addition to the two end faces of the series aluminum row I and the series aluminum row II, the other four faces of the battery group are surrounded by the upper side plate, the lower side plate and the two battery end plates to form a whole, and multiple blade batteries, liquid cooling plates and heat conducting plates are fixed for subsequent use; the outer side of the series aluminum row I and the series aluminum row II is provided with a Mylar sheet to protect the surface. The serpentine liquid cooling plate blade battery module of the present invention can effectively improve the heat dissipation efficiency of the battery module through the coordinated use of the liquid cooling plate and the heat conducting plate, increase the service life and performance of the battery, and enable the battery module to be better used in the field of electric vehicles.

[0024] like Figure 1 to Figure 2 A serpentine liquid cooling plate blade battery cell module is shown, wherein the liquid cooling plate 2 is a serpentine cooling plate, and the serpentine cooling plate is composed of a plurality of U-shaped plates connected in series, and adjacent U-shaped plates are arranged side by side and connected end to end. Two blade batteries 1 are placed between each U-shaped loop of the liquid cooling plate 2, and each of the blade batteries 1 is in contact with the serpentine liquid cooling plate 2. The liquid cooling plate of the present invention is a serpentine cooling plate, and the serpentine cooling plate is composed of a plurality of U-shaped plates connected end to end, wherein each U-shaped loop is provided with two blade batteries, which can ensure that each blade battery cell can be in contact with the serpentine liquid cooling plate, making the heat dissipation more uniform and improving the heat dissipation efficiency. At the same time, the serpentine cooling plate is tightly connected to the blade batteries, which reduces the overall volume of the battery cell module. After grouping, the volume is more compact and occupies less space, which is conducive to improving the application range of the battery cell module.

[0025] like Figure 1 to Figure 2A serpentine liquid cooling plate blade battery cell module is shown, the shape of the heat conducting plate 5 is the same as the shape of the liquid cooling plate 2, and two heat conducting plates 5 are arranged on both sides of the liquid cooling plate 2 to assist in cooling. The liquid cooling plate 2 and the heat conducting plate 5 are fixed to the battery cell group by a thermally conductive structural adhesive. Heat conducting plates are also provided on both sides of the liquid cooling plate of the present invention, and the shape of the heat conducting plates and the connection method with the blade batteries are the same. The heat conducting plates of this shape and arrangement can conduct heat and cool the blade batteries, and cooperate with the liquid cooling plate to improve the heat dissipation performance of the battery cell module; the liquid cooling plate and the heat conducting plate are fixed to the battery cell group by a thermally conductive structural adhesive to ensure that the contact between the two is uniform and reliable.

[0026] like Figure 1 to Figure 2 A serpentine liquid cooling plate blade battery module is shown, wherein the upper side plate 7 and the lower side plate 8 are provided with through holes for exposing the ends of the liquid cooling plate 2 and the heat conducting plate 5. The upper side plate and the lower side plate of the present invention are provided with a plurality of through holes, and when the upper side plate and the lower side plate are connected to the battery pack, the connection between the liquid cooling plate and the heat conducting plate can be exposed through the through holes, thereby improving the heat dissipation performance, and also reducing the volume of the battery module, which is convenient for subsequent use.

[0027] like Figure 1 to Figure 2 A serpentine liquid cooling plate blade battery module is shown, the side plate 4 is a bent plate on both sides of the upper side plate 7 and the lower side plate 8, and the side plate 4 is connected to the battery end plate 3 by rivets 15. The battery group of the present invention has battery end plates on both sides, and the battery end plates are riveted to the upper side plate and the lower side plate by 5mm rivets, which can effectively ensure the overall connectivity of the battery module, reduce the failure rate, and provide protection for subsequent use.

[0028] like Figure 1 to Figure 2 In the serpentine liquid cooling plate blade battery module shown, the insulating seat 14 is fixed to the battery end plate 3 by screws 13. The insulating seat of the present invention is fixed to the side of the battery end plate by M5 hexagon socket head screws.

[0029] A method for installing a serpentine liquid cooling plate blade battery module comprises the following steps: S1. Stack the blade cells 1 in groups of two, with the positive and negative electrodes of adjacent blade cells 1 arranged alternately, insert the stacked blade cells 1 into the U-shaped loop of the liquid cooling plate 12, ensure that one side of each cell is in contact with the liquid cooling plate, and apply thermal conductive structural adhesive on the contact surface of the blade cells 1 and the liquid cooling plate 12 to ensure that the contact between the two is uniform and reliable; S2. Insert the thermal conductive plate 5 from both sides of the positive and negative electrodes of the blade cells 1 into the stacked cell group and apply thermal conductive structural adhesive to fix them; S3, bonding the blade battery cell 1 to the battery cell end plate 3 and placing them at both ends of the battery cell group; S4, place the stacked battery cell group on the lower side plate 8 and let it stand until the long and narrow sides of the blade battery cell 1 are flush, then buckle the upper side plate 7 on the upper side of the battery cell group, and use 5mm rivets 15 to rivet the upper side plate 7, the lower side plate 8 and the battery cell end plate 3; S5. Fix the insulating seat 14 to the side of the battery end plate 3 by using the M5 hexagon socket head screw 13; S6. Weld the series aluminum bars I9 and II11 to the positive and negative poles at both ends of the blade cells 1, respectively, so that the adjacent blade cells 1 are connected in series. Weld the positive and negative aluminum bars 10 to the first and last blade cells 1. Note that the two through holes on the positive and negative aluminum bars 10 are aligned with the threaded holes on the insulating seat 14. S7. Paste the Mylar sheet 6 on the surface of the series-connected aluminum bar Ⅰ9 and the series-connected aluminum bar Ⅱ11 for protection.

[0030] The serpentine liquid cooling plate blade battery cell module and installation method of the present invention conducts heat and cools down through the heat conducting plates arranged on both sides, thereby solving the problems of heat generation after the blade batteries are grouped and poor heat dissipation that affects the performance and quality of the battery, and improving the heat dissipation performance and service life of the battery cell module, providing more possibilities for the application of lithium batteries.

[0031] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0032] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0033] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A serpentine liquid cooling plate blade battery module, characterized in that: The invention comprises a blade cell (1), wherein a plurality of the blade cells (1) are arranged side by side to form a cell group, wherein a liquid cooling plate (2) and a heat conducting plate (5) are provided inside the cell group, wherein the heat conducting plate (5) is arranged on both sides of the liquid cooling plate (2); a series aluminum bar I (9) and a series aluminum bar II (11) for connecting the plurality of blade cells (1) in series are provided at both ends of the cell group, and positive and negative aluminum bars (10) are provided at both ends of the series aluminum bar I (9); an upper side plate (7) and a lower side plate (8) are provided at the upper and lower ends of the cell group, and cell end plates (3) are provided on both sides of the cell group, wherein the upper side plate (7) and the lower side plate (8) are connected to the cell end plates (3) via side plates (4); an insulating seat (14) for fixing the positive and negative aluminum bars (10) is provided on the cell end plates (3), and Mylar sheets (6) are provided on the outer sides of the series aluminum bars I (9) and the series aluminum bars II (11).

2. A serpentine liquid cooling plate blade battery module according to claim 1, characterized in that: The liquid cooling plate (2) is a serpentine cooling plate, which is composed of a plurality of U-shaped plates connected in series, and adjacent U-shaped plates are arranged side by side and connected end to end.

3. A serpentine liquid cooling plate blade battery module as claimed in claim 2, characterized in that: Two blade cells (1) are placed between each U-shaped loop of the liquid cooling plate (2), and each of the blade cells (1) is in contact with the serpentine liquid cooling plate (2).

4. The serpentine liquid cooling plate blade battery module according to claim 2, characterized in that: The shape of the heat conducting plate (5) is the same as that of the liquid cooling plate (2), and the two heat conducting plates (5) are arranged on both sides of the liquid cooling plate (2) to assist in cooling.

5. The serpentine liquid cooling plate blade battery module according to claim 1, characterized in that: The liquid cooling plate (2) and the heat conducting plate (5) are fixed on the battery cell group by means of heat conducting structural adhesive.

6. The serpentine liquid cooling plate blade battery module according to claim 1, characterized in that: The upper side plate (7) and the lower side plate (8) are provided with through holes for exposing the ends of the liquid cooling plate (2) and the heat conducting plate (5).

7. The serpentine liquid cooling plate blade battery module according to claim 1, characterized in that: The side plates (4) are bent plates on both sides of the upper side plate (7) and the lower side plate (8), and the side plates (4) are connected to the cell end plates (3) via rivets (15).

8. The serpentine liquid cooling plate blade battery module according to claim 1, characterized in that: The insulating seat (14) is fixed on the battery cell end plate (3) by means of screws (13).

9. A method for installing the serpentine liquid cooling plate blade battery module according to claim 1, characterized in that: The steps include: S1. stacking the blade cells (1) in groups of two, inserting the stacked blade cells (1) into a U-shaped loop of a liquid cooling plate (12), and applying a thermally conductive structural adhesive to the contact surfaces of the blade cells (1) and the liquid cooling plate (12); S2, inserting the heat conducting plate (5) into the stacked battery cell group from both sides of the positive and negative electrodes of the blade battery cell (1) and applying heat conducting structural adhesive to fix it; S3, bonding the blade battery cell (1) to the battery cell end plate (3) and placing them at both ends of the battery cell group; S4, placing the stacked battery cell group on the lower side plate (8), then buckling the upper side plate (7) onto the upper side of the battery cell group, and finally connecting the upper side plate (7), the lower side plate (8) and the battery cell end plate (3); S5, fixing the insulating seat (14) on the side of the cell end plate (3); S6, welding the series aluminum bar I (9) and the series aluminum bar II (11) to the positive and negative poles at both ends of the blade battery cells (1) respectively, so that adjacent blade battery cells (1) are connected in series, and welding the positive and negative aluminum bars (10) to the first and last blade battery cells (1); S7. Paste the Mylar sheet (6) on the surface of the series-connected aluminum bar I (9) and the series-connected aluminum bar II (11) for protection.

10. The method for installing the serpentine liquid cooling plate blade battery module according to claim 1, characterized in that: In step S1, the positive and negative electrodes of adjacent blade cells (1) are arranged alternately.

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