Integrated liquid cooling device and battery thereof

Abstract

The utility model relates to an integrated liquid cooling device and a battery thereof, which are used for cooling a battery module consisting of a plurality of battery cells. The insulating heat-conducting isolation piece is connected to the liquid cooling piece along the first direction and is arranged towards one side of the electrodes of the plurality of battery cells; the confluence pieces are connected to the side, away from the liquid cooling piece, of the insulation heat conduction isolation piece, and the multiple confluence pieces are arranged at intervals in the third direction; the FPC assembly is connected to the liquid cooling piece in the first direction and arranged towards one side of the electrodes of the multiple battery cells, and the FPC assembly is provided with an electric connection terminal connected with the current converging piece so that the FPC assembly can be electrically connected with the current converging piece; the liquid cooling piece and the insulating heat conduction isolation piece are each provided with a through welding avoiding hole, and the electrode and the convergence piece are welded through the welding avoiding holes. According to the utility model, the insulating heat-conducting isolation piece is integrally connected between the liquid cooling piece and the confluence piece, so that the use of heat-conducting glue is avoided, and the difficulty of an installation process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to an integrated liquid cooling device and a battery thereof. Background Art

[0002] In some battery modules, the battery pack, the liquid cooling system and the bus bar are separated structures, and such a structure has the following disadvantages: First, thermal conductive glue needs to be applied between the liquid cooling plate and the bus bar to ensure heat exchange between the liquid cooling plate and the electrode of the battery cell. However, the thermal conductive glue is unevenly applied and it is difficult to improve in terms of technology; Second, when the battery cell is installed in an inverted manner (i.e., the electrode assembly is arranged facing the liquid cooling plate), the distance between the liquid cooling plate and the bus bar is relatively close, resulting in a risk of short circuit and arcing between the liquid cooling plate and the bus bar; Third, the liquid cooling plate, the thermal conductive glue, and the bus bar all need to be independently installed in the battery pack, and the process is complex, resulting in low assembly efficiency and high production and manufacturing costs. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the problems in the prior art that the thermal conductive glue between the liquid cooling plate and the bus bar is unevenly applied, and the glue application process is complex and the insulation effect is poor. Furthermore, an integrated liquid cooling device is provided, which avoids the use of thermal conductive glue and improves the insulation effect between the liquid cooling plate and the bus bar; the liquid cooling part, the bus bar and the insulating and heat-conducting isolation part are integrally connected, which also reduces the installation process difficulty.

[0004] To solve the above technical problem, the utility model provides an integrated liquid cooling device for cooling a battery module composed of a plurality of battery cells, including,

[0005] A liquid cooling part;

[0006] An insulating and heat-conducting isolation part, which is connected to the liquid cooling part along a first direction and is arranged on a side facing the electrodes of the plurality of battery cells;

[0007] A bus bar, which is connected to a side of the insulating and heat-conducting isolation part away from the liquid cooling part, and the plurality of bus bars are arranged at intervals along a third direction;

[0008] An FPC component, which is connected to the liquid cooling part along the first direction and is arranged on a side facing the electrodes of the plurality of battery cells, and the FPC component has electrical connection terminals connected to the bus bar to electrically connect the FPC component and the bus bar;

[0009] Wherein, through holes for welding avoidance are provided on both the liquid cooling part and the insulating and heat-conducting isolation part, and the electrodes and the bus bar are welded through the welding avoidance through holes.

[0010] In one embodiment of the present utility model, there are a plurality of the insulating and heat-conducting spacers, and the plurality of insulating and heat-conducting spacers are arranged at intervals along the second direction, and the FPC assembly is disposed between two adjacent insulating and heat-conducting spacers.

[0011] In one embodiment of the present utility model, the FPC assembly includes a first support body, a first circuit board, and a second support body that are sequentially arranged along the first direction; wherein, the first support body is arranged on one side of the liquid cooling member along the first direction and is connected thereto.

[0012] In one embodiment of the present utility model, the FPC assembly further includes a second circuit board, and the second circuit board is arranged on one side of the second support body along the first direction and is connected thereto.

[0013] In one embodiment of the present utility model, the first support body is adhesively bonded to both the liquid cooling member and the first circuit board; the second support body is adhesively bonded to both the first circuit board and the second circuit board.

[0014] In one embodiment of the present utility model, the second support body is recessed with a mounting groove along the first direction, and the second circuit board is received in the mounting groove.

[0015] In one embodiment of the present utility model, a plurality of the electrical connection terminals are provided on both sides of the FPC assembly along the second direction, and the electrical connection terminals on both sides are respectively connected to the bus bar in one-to-one correspondence.

[0016] In one embodiment of the present utility model, an inner groove for accommodating the electrical connection terminal is provided on a surface of the bus bar connected to the insulating and heat-conducting spacer.

[0017] In one embodiment of the present utility model, the welding method between the electrode and the bus bar is laser penetration welding.

[0018] To solve the above problems, a battery is further provided, including,

[0019] a battery cell, which includes two electrodes provided on the same side; and

[0020] the integrated liquid cooling device, the integrated liquid cooling device is disposed on a side facing the electrode of the battery cell, and the electrodes are respectively welded and connected to the bus bar.

[0021] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0022] For the integrated liquid cooling device described in the present utility model, an insulating and heat-conducting spacer is arranged between the liquid cooling component and the busbar component. On the one hand, the insulating and heat-conducting spacer forms a heat-conducting component between the battery cell electrode assembly and the liquid cooling component, effectively transferring the heat generated by the electrode assembly to the liquid cooling component. On the other hand, the insulating and heat-conducting spacer also forms an insulator between the busbar component and the liquid cooling component, ensuring electrical insulation between the two and solving the problems of short circuit and arcing between them. The insulating and heat-conducting spacer also forms the installation support for the busbar component and the FPC component. The busbar component and the FPC component are pre-connected into an integral structure through the insulating and heat-conducting spacer, facilitating the overall installation of the battery pack and reducing the installation difficulty. Both the liquid cooling component and the insulating and heat-conducting spacer are provided with welding avoidance holes. In the case where the busbar component, the FPC component and the insulating and heat-conducting spacer are pre-assembled, the electrode assembly and the busbar component can be welded through the welding avoidance holes, reducing the complexity of the welding process. Description of the Drawings

[0023] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in combination with the drawings, where

[0024] Figure 1 is a schematic structural diagram of the integrated liquid cooling device in the preferred embodiment of the present utility model.

[0025] Figure 2 is Figure 1 a partial enlarged view of the position A shown.

[0026] Figure 3 is Figure 1 a schematic structural diagram of the insulating and heat-conducting spacer of the integrated liquid cooling device shown.

[0027] Figure 4 is Figure 1 a schematic structural diagram of the liquid cooling component of the integrated liquid cooling device shown.

[0028] Figure 5 is Figure 1 a schematic structural diagram of the busbar component of the integrated liquid cooling device shown.

[0029] Figure 6 is Figure 1 a schematic diagram of the exploded view of the integrated liquid cooling device shown.

[0030] Figure 7 is a schematic structural diagram of an embodiment of the present utility model including an integrated liquid cooling device and battery cells.

[0031] Description of the reference numerals in the drawings: 1. Liquid cooling component; 2. Insulating and heat-conducting isolation component; 3. Busbar component; 31. Inner groove; 4. FPC component; 41. First support body; 42. First circuit board; 43. Second support body; 44. Second circuit board; 5. Electrical connection terminal; 6. Welding avoidance hole; 7. Battery cell; 71. Electrode; 9. Installation groove; 10. Gap; X. First direction; Z. Third direction; Y. Second direction. Detailed implementation manners

[0032] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the illustrated embodiments are not intended to limit the present utility model.

[0033] Embodiment

[0034] Referring to Figure 1 、 3 As shown in FIGS. 4, in one embodiment of the present utility model, an integrated liquid cooling device is provided for cooling a battery module composed of a plurality of battery cells 7. When assembling the battery module, the battery cells 7 are arranged upside down so that the electrode assembly faces the liquid cooling device. The integrated liquid cooling device includes a liquid cooling component 1, an insulating and heat-conducting isolation component 2, a busbar component 3, and an FPC component 4, wherein,

[0035] The liquid cooling component 1 is preferably arranged in a plate-like structure, which is configured to absorb heat or is provided with a flow channel inside for the heat-conducting medium to circulate and flow to quickly absorb the heat generated by the battery module;

[0036] The insulating and heat-conducting isolation component 2 is located on one side of the liquid cooling component 1 along the first direction X and is connected thereto. As Figure 1 shown, the first direction X is the vertical direction. The insulating and heat-conducting isolation component 2 is ultrasonically welded or fusion-welded to the liquid cooling component 1. Specifically, in this embodiment, the insulating and heat-conducting isolation component 2 is located on the upper surface of the liquid cooling component 1 and is arranged on the side facing the electrodes 71 of the plurality of battery cells 7. The insulating and heat-conducting isolation component 2 is made of a material with excellent heat-conducting performance. The insulating and heat-conducting isolation component 2 is preferably made of copper. The insulating and heat-conducting isolation component 2 is also used to isolate the liquid cooling component 1 and the battery module to prevent electric leakage and short circuit;

[0037] The busbar component 3 is located on one side of the insulating and heat-conducting isolation component 2 along the first direction X and is connected thereto. In a preferred solution, the busbar component 3 is laser-welded to the insulating and heat-conducting isolation component 2. In this embodiment, the busbar component 3 is located on the upper surface of the insulating and heat-conducting isolation component 2. A plurality of busbar components 3 are arranged at intervals along the third direction Z corresponding to the plurality of battery cells 7, so that the busbar components 3 and the electrodes 71 of the battery cells 7 are connected one by one. In this embodiment, the third direction Z is the horizontal direction and is perpendicular to the first direction X;

[0038] The FPC component 4 is connected to the liquid cooling part 1 along the first direction X. The FPC component 4 is located between two insulating and heat-conducting isolation parts 2 along the second direction Y, and is arranged on the side facing the electrodes 71 of the plurality of battery cells 7. In this embodiment, the FPC component 4 is located on the upper surface of the liquid cooling part 1. The FPC component 4 has an electrical connection terminal 5 connected to the bus bar 3, and the electrical connection terminal 5 is used for the FPC component 4 to be electrically connected to the bus bar 3.

[0039] Wherein, through welding avoidance holes 6 are provided on both the liquid cooling part 1 and the insulating and heat-conducting isolation parts 2. When connecting the integrated liquid cooling device to the battery cells 7, the electrodes 71 and the bus bar 3 can be welded through the welding avoidance holes 6. The plurality of welding avoidance holes 6 are evenly spaced along the distribution direction of the battery cells 7.

[0040] In an embodiment of the present utility model, referring to Figure 6 As shown, there are a plurality of insulating and heat-conducting isolation parts 2. The plurality of insulating and heat-conducting isolation parts 2 are arranged at intervals along the second direction Y, and the second direction Y is the horizontal direction. A gap 10 is provided between adjacent insulating and heat-conducting isolation parts 2. The FPC component 4 is arranged in the gap 10 between two adjacent insulating and heat-conducting isolation parts 2. Each insulating and heat-conducting isolation part 2 extends along the third direction Z, and the third direction Z is the horizontal direction and is perpendicular to the second direction Y.

[0041] In an embodiment of the present utility model, referring to Figure 1 As shown, the FPC component 4 extends along the third direction Z. The FPC component 4 includes a first support body 41, a first circuit board 42, and a second support body 43 arranged in sequence along the first direction X. The first support body 41 is used to support the first circuit board 42 and the second support body 43. Among them, the first support body 41 is arranged on one side of the liquid cooling part 1 along the first direction X and is connected thereto. Both the first support body 41 and the second support body 43 are made of foam material, and the foam material is a foam material made of polyethylene. The first circuit board 42 is a low-voltage acquisition circuit board. The bottom of the first circuit board 42 is connected to the top of the first support body 41, and the bottom of the second support body 43 is connected to the top of the first circuit board 42.

[0042] In an embodiment of the present utility model, referring to Figure 2 As shown, the FPC component 4 further includes a second circuit board 44, and the second circuit board 44 is a temperature-sensing circuit board. The second circuit board 44 is arranged on one side of the second support body 43 along the first direction X and is connected thereto. Specifically, the bottom of the second circuit board 44 is connected to the top of the second support body 43, and the second support body 43 is used to support the second circuit board 44.

[0043] In an embodiment of the present utility model, referring to Figure 2As shown, the bottom and top of the first support 41 are adhesively bonded to the liquid cooling member 1 and the first circuit board 42 respectively; the bottom and top of the second support 43 are adhesively bonded to the first circuit board 42 and the second circuit board 44 respectively.

[0044] In an embodiment of the present invention, referring to Figure 2 As shown, the second support 43 is recessed with an installation groove 9 along the first direction X, the installation groove 9 extends along the third direction Z, the second circuit board 44 is received in the installation groove 9, and the two side walls of the installation groove 9 are set higher than the top of the second circuit board 44, so as to facilitate the external mechanism to avoid the second circuit board 44 when pressing the second support 43 along the first direction X.

[0045] In an embodiment of the present invention, referring to Figure 2 As shown, a plurality of electrical connection terminals 5 are provided on both sides of the FPC assembly 4 along the second direction Y, and the plurality of electrical connection terminals 5 on each side are also evenly and spaced along the third direction Z, and the electrical connection terminals 5 on both sides are respectively connected to the busbar 3 in one-to-one correspondence.

[0046] In an embodiment of the present invention, referring to Figure 5 As shown, the surface of the busbar 3 connected to the insulating and heat-conducting isolation member 2 is provided with an inner groove 31 for accommodating the electrical connection terminal 5, and one end of the electrical connection terminal 5 is inserted into the inner groove 31 to realize the electrical connection between the busbar 3 and the FPC assembly 4.

[0047] In an embodiment of the present invention, the welding method between the electrode 71 and the busbar 3 is laser penetration welding.

[0048] In an embodiment of the present invention, referring to Figure 2 As shown, the top of the first support 41 is flush with the top of the insulating and heat-conducting isolation member 2, so that the electrical connection terminal 5 can be inserted into the inner groove 31.

[0049] Referring to Figure 1 and 7 As shown, to solve the above problems, a battery is further provided, including,

[0050] a battery cell 7, which includes two electrodes 71 provided on the same side; and

[0051] an integrated liquid cooling device, the integrated liquid cooling device is arranged on the side facing the electrode 71 of the battery cell 7, and the electrodes 71 are respectively welded and connected to the busbar 3.

[0052] The working principle of the integrated liquid cooling device and its battery of the present invention is:

[0053] The insulating and heat-conducting spacer 2, the bus bar 3 and the liquid cooling member 1 are integrally connected. After the cell electrode 71 is welded to the bus bar 3, the heat generated by the cell electrode 71 sequentially passes through the bus bar 3 and the insulating and heat-conducting spacer 2 and finally is transferred to the liquid cooling member 1 for heat exchange. The insulating and heat-conducting spacer 2 not only ensures normal heat exchange between the bus bar 3 and the liquid cooling member 1, but also reduces the installation process difficulty and production cost.

[0054] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the creation of the present utility model.

Claims

1. An integrated liquid cooling device for cooling a battery module composed of a plurality of battery cells (7), characterized in that, Comprising, a liquid cooling component (1); an insulating and heat-conducting isolation component (2), which is connected to the liquid cooling component (1) along the first direction (X) and is arranged on one side facing the electrodes (71) of the plurality of battery cells (7); a bus bar component (3), which is connected to the side of the insulating and heat-conducting isolation component (2) away from the liquid cooling component (1), and the plurality of bus bar components (3) are arranged at intervals along the third direction (Z); an FPC component (4), which is connected to the liquid cooling component (1) along the first direction (X) and is arranged on one side facing the electrodes (71) of the plurality of battery cells (7), and the FPC component (4) has electrical connection terminals (5) connected to the bus bar component (3) so that the FPC component (4) is electrically connected to the bus bar component (3); wherein, through holes for welding avoidance (6) are provided on both the liquid cooling component (1) and the insulating and heat-conducting isolation component (2), and the electrodes (71) and the bus bar component (3) are welded through the through holes for welding avoidance (6).

2. An integrated liquid cooling device according to claim 1, wherein There are a plurality of the insulating and heat-conducting isolation components (2), and the plurality of insulating and heat-conducting isolation components (2) are arranged at intervals along the second direction (Y), and the FPC component (4) is arranged between two adjacent insulating and heat-conducting isolation components (2).

3. An integrated liquid cooling device according to claim 1 or 2, characterized in that The FPC component (4) includes a first support body (41), a first circuit board (42) and a second support body (43) arranged in sequence along the first direction (X); wherein, the first support body (41) is arranged on one side of the liquid cooling component (1) along the first direction (X) and is connected thereto.

4. An integrated liquid cooling device according to claim 3, characterized in that, The FPC component (4) further includes a second circuit board (44), and the second circuit board (44) is arranged on one side of the second support body (43) along the first direction (X) and is connected thereto.

5. An integrated liquid cooling device according to claim 4, characterized in that, The first support body (41) is adhesively bonded to the liquid cooling component (1) and the first circuit board (42) respectively; the second support body (43) is adhesively bonded to the first circuit board (42) and the second circuit board (44) respectively.

6. An integrated liquid cooling device according to claim 5, characterized in that, The second support body (43) is recessed with a mounting groove (9) along the first direction (X), and the second circuit board (44) is received in the mounting groove (9).

7. The integrated liquid cooling device according to claim 2, wherein, A plurality of the electrical connection terminals (5) are provided on both sides of the FPC component (4) along the second direction (Y), and the electrical connection terminals (5) on both sides are respectively connected to the bus bar component (3) in one-to-one correspondence.

8. An integrated liquid cooling device according to claim 1 or 7, characterized in that, An inner groove (31) for accommodating the electrical connection terminals (5) is provided on the surface of the bus bar component (3) connected to the insulating and heat-conducting isolation component (2).

9. The integrated liquid cooling device according to claim 1, characterized in that, The welding method between the electrode (71) and the bus bar component (3) is laser penetration welding.

10. A battery, characterized in that, Comprising, a battery cell (7), which includes two electrodes (71) provided on the same side; and the integrated liquid cooling device according to any one of claims 1 to 9, the integrated liquid cooling device is arranged on one side facing the electrode (71) of the battery cell (7), and the electrodes (71) are respectively welded and connected to the bus bar component (3).

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