Immersed blade module

Abstract

The utility model belongs to the technical field of power batteries, and discloses an immersed blade module which comprises a shell and a battery cell assembly, the shell is in a blade shape and is provided with a first side wall and a second side wall which are opposite to each other in the thickness direction of the shell, cooling media circulate in the shell, the shell is provided with a medium inlet and a medium outlet, and the battery cell assembly is arranged in the shell. The medium inlet is opposite to the medium outlet, a cooling medium flows into the shell through the medium inlet and flows out of the shell through the medium outlet, the battery cell assembly is arranged in the shell, the battery cell assembly is spaced from the medium inlet and the medium outlet, and the battery cell assembly is provided with a first surface and a second surface which are opposite in the thickness direction; the first surface is opposite to and spaced from the first side wall, the second surface is opposite to and spaced from the second side wall, the cooling medium can be in contact with the first surface and the second surface, and the heat exchange area of the cell assembly and the cooling medium is enlarged; the immersed blade die set provided by the utility model is high in assembling efficiency and high in heat dissipation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to an immersion blade module. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional automotive fuels as their power source. As a product of the increasingly scarce oil resources, new energy vehicles have the advantages of environmental protection, energy saving, and no pollutants. They are being gradually promoted and used. Electricity, as one of the main energy sources for new energy vehicles, has advantages that traditional energy sources cannot match and is gradually gaining popularity among consumers. Power batteries are one of the important components of electric vehicles, and their performance is directly related to the vehicle's cruising range. Power batteries include cylindrical batteries, square batteries, soft-pack batteries, etc. Among them, soft-pack batteries have higher flexibility and stronger adaptability than cylindrical batteries and square batteries, and can better adapt to the design requirements of different models, and are therefore widely used.

[0003] However, soft-pack batteries have weak mechanical strength, are difficult to group, have poor module consistency, and require complex heat dissipation designs after grouping, so they are less safe.

[0004] Therefore, a device is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an immersion blade module with high grouping efficiency and high heat dissipation efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Immersed blade module, including:

[0008] A shell, wherein the shell is blade-shaped, and has a first side wall and a second side wall opposite to each other in the thickness direction thereof, and a cooling medium flows inside the shell, and the shell is provided with a medium inlet and a medium outlet, the medium inlet and the medium outlet are opposite to each other, and the cooling medium flows into the inside of the shell through the medium inlet and flows out through the medium outlet;

[0009] A battery cell assembly, wherein the battery cell assembly is arranged inside the shell, the battery cell assembly is spaced apart from the medium inlet and the medium outlet, the battery cell assembly has a first surface and a second surface relative to each other in the thickness direction thereof, the first surface is opposite to and spaced apart from the first side wall, the second surface is opposite to and spaced apart from the second side wall, and the cooling medium can contact the first surface and the second surface.

[0010] Preferably, the outer shell includes a shell, a first sealing cover and a second sealing cover, the shell is provided with openings at opposite ends, the first sealing cover and the second sealing cover are respectively buckled into the two openings, and the first sealing cover, the shell and the second sealing cover are arranged to form an accommodating space, and the battery cell assembly is arranged in the accommodating space.

[0011] Preferably, the medium inlet and the medium outlet are respectively provided in the first sealing cover and the second sealing cover.

[0012] Preferably, the outer shell is provided with positive electrode holes and negative electrode holes at intervals, and the positive electrode holes and the negative electrode holes are simultaneously provided in the first sealing cover / the second sealing cover, or the positive electrode holes and the negative electrode holes are respectively provided in the first sealing cover and the second sealing cover.

[0013] Preferably, it further includes a positive electrode column and a negative electrode column, one end of the positive electrode column is inserted into the positive electrode hole and extends into the accommodating space, and is connected to the positive electrode of the battery cell assembly, and one end of the negative electrode column is inserted into the negative electrode hole and extends into the accommodating space, and is connected to the negative electrode of the battery cell assembly.

[0014] Preferably, two busbars are further included, wherein the busbars are arranged in the accommodating space, and the two busbars are both connected to the positive pole and the negative pole, and the positive pole, the negative pole and the two busbars form a loop.

[0015] Preferably, the battery cell assembly further comprises an end connector, and the end connector is connected to the positive electrode column, the negative electrode column, and the positive electrode and the negative electrode of the battery cell assembly.

[0016] Preferably, the battery cell assembly comprises a plurality of battery cells connected in series and / or in parallel, the plurality of battery cells are arranged in at least two rows along the thickness direction thereof, and two adjacent battery cells are spaced apart.

[0017] Preferably, the cooling medium is insulating coolant or insulating gas.

[0018] Preferably, an explosion-proof valve is further included, and the explosion-proof valve is arranged on the first sealing cover and / or the second sealing cover.

[0019] Beneficial effects: The utility model provides an immersion blade module, comprising a shell and a battery cell assembly, wherein the shell is in a blade shape, the shell has a first side wall and a second side wall relative to each other in the thickness direction, and a cooling medium flows through the interior of the shell, the shell is provided with a medium inlet and a medium outlet, the medium inlet and the medium outlet are opposite to each other, the cooling medium flows into the interior of the shell through the medium inlet, and flows out through the medium outlet, the battery cell assembly is arranged inside the shell, the battery cell assembly is spaced apart from the medium inlet and the medium outlet, the battery cell is arranged in the blade-shaped shell, the grouping efficiency is high, the battery cell assembly has a first surface and a second surface relative to each other in the thickness direction, the first surface is opposite to and spaced apart from the first side wall, the second surface is opposite to and spaced apart from the second side wall, the cooling medium can contact the first surface and the second surface, thereby expanding the heat exchange area between the battery cell assembly and the cooling medium and improving the heat dissipation efficiency of the battery cell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an immersion blade module provided by an embodiment of the utility model;

[0021] Figure 2 This is a partial structural diagram of the submerged blade module provided by the embodiment of the utility model. Figure 1 (excluding the housing);

[0022] Figure 3 This is a partial structural diagram of the submerged blade module provided by the embodiment of the utility model. Figure 2 (excluding the housing);

[0023] Figure 4 It is a structural schematic diagram of a first sealing cover provided in an embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of a second sealing cover provided in an embodiment of the utility model;

[0025] Figure 6 This is a partial structural diagram of the submerged blade module provided by the embodiment of the utility model. Figure 3 (excluding the housing);

[0026] Figure 7 This is a partial structural diagram of the submerged blade module provided by the embodiment of the utility model. Figure 4 (excluding housing).

[0027] In the figure:

[0028] 1. Shell; 10. Explosion-proof valve; 11. First sealing cover; 111. Medium inlet; 112. Positive electrode hole; 113. Negative electrode hole; 12. Second sealing cover; 121. Medium outlet; 122. Collection port; 2. Battery cell assembly; 21. Battery cell; 211. Positive electrode ear; 212. Negative electrode ear; 22. End connector; 23. Intermediate connector; 3. Positive electrode column; 4. Negative electrode column; 5. Busbar. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] This embodiment provides an immersion blade module with high grouping efficiency and good heat dissipation effect.

[0034] Specifically, Figure 1 As shown, the submerged blade module provided in this embodiment includes a housing 1 and a battery core assembly 2, and the battery core assembly 2 is arranged inside the housing 1. Figure 2 As shown, specifically, the housing 1 is in the shape of a blade, and a housing space is provided inside the housing 1, and the battery cell assembly 2 is provided in the housing space, and the housing 1 is provided with a medium inlet 111 and a medium outlet 121, and a cooling medium is introduced into the housing space through the medium inlet 111, and the cooling medium flows out through the medium outlet 121 after completing heat dissipation of the battery cell assembly 2, and the battery cell assembly 2 is completely immersed in the cooling medium, preferably, the medium inlet 111 and the medium outlet 121 are opposite, and the oppositely arranged medium inlet 111 and medium outlet 121 can ensure that the cooling medium has enough circulation time in the housing space to have an excellent heat dissipation effect. Preferably, the battery cell assembly 2 is separated from the medium inlet 111 and the medium outlet 121, so as to avoid affecting the circulation of the cooling medium.

[0035] Exemplarily, the cooling medium is insulating coolant, insulating gas, or the like.

[0036] Furthermore, the battery cell assembly 2 has a first surface and a second surface relative to each other in the thickness direction thereof, and the first surface and the second surface are the sides of the battery cell assembly 2 with the largest surface area. Preferably, the outer shell 1 has a first side wall and a second side wall relative to each other in the thickness direction thereof. Since the outer shell 1 is blade-shaped, the first side wall and the second side wall are the side walls of the outer shell 1 with the largest surface area. Further preferably, the first surface is opposite to and spaced from the first side wall, and the second surface is opposite to and spaced from the second side wall, so that channels can be formed between the first side wall and the first surface and between the second side wall and the second surface, and the cooling medium can enter the channel and cool the first surface and the second surface.

[0037] Furthermore, the bottom of the battery cell assembly 2 contacts the bottom of the outer shell 1 to provide support for the battery cell assembly 2. Preferably, the top of the battery cell assembly 2 is spaced from the inner wall of the outer shell 1, and the end of the battery cell assembly 2 is spaced from the inner wall of the outer shell 1, so as to reserve more circulation space for the cooling medium, expand the heat exchange area between the cooling medium and the battery cell assembly 2, and facilitate the heat dissipation of the battery cell assembly 2.

[0038] In some possible embodiments, see Figure 7 A plurality of serpentine flow channels are provided at intervals on the first surface and / or the second surface of the battery cell assembly 2 to reduce the flow resistance of the cooling medium and improve the uniformity of the surface heat dissipation effect of the battery cell assembly 2, thereby ensuring the temperature balance of the battery cell assembly 2.

[0039] In this embodiment, the housing 1 includes a shell, a first sealing cover 11 and a second sealing cover 12. The shell is provided with openings at opposite ends. The first sealing cover 11 and the second sealing cover 12 are respectively buckled in the two openings, and the first sealing cover 11, the shell and the second sealing cover 12 are surrounded to form an accommodating space. Preferably, the edge of the first sealing cover 11 and the edge of the second sealing cover 12 are circumferentially welded to the two openings of the shell to ensure sealing. Preferably, the medium inlet 111 and the medium outlet 121 are respectively opened in the first sealing cover 11 and the second sealing cover 12.

[0040] Preferably, the submerged blade module is also provided with an explosion-proof valve 10. In the present embodiment, two explosion-proof valves 10 are provided, and the two explosion-proof valves 10 are respectively provided on the first sealing cover 11 and the second sealing cover 12. In other feasible embodiments, they can also be provided in the first sealing cover 11 or the second sealing cover 12 at the same time, and can also be provided on the shell, which is not specifically limited here.

[0041] Alternatively, if Figure 5 As shown, the first sealing cover 11 / the second sealing cover 12 is also provided with a collection port 122 , and the voltage and temperature of the immersion blade module can be detected in real time by accessing the collection port 122 .

[0042] Furthermore, if Figure 2-Figure 5 As shown, the outer shell 1 is provided with positive electrode holes 112 and negative electrode holes 113 at intervals, and the positive electrode holes 112 and the negative electrode holes 113 can be simultaneously arranged on the first sealing cover 11 / the second sealing cover 12, or, the positive electrode holes 112 and the negative electrode holes 113 can also be respectively arranged on the first sealing cover 11 and the second sealing cover 12. The immersion blade module provided in this embodiment also includes a positive electrode column 3, a negative electrode column 4 and two bus bars 5, wherein one end of the positive electrode column 3 is inserted into the positive electrode hole 112 and extends into the accommodating space, and is connected to the positive electrode of the battery cell assembly 2, one end of the negative electrode column 4 is inserted into the negative electrode hole 113 and extends into the accommodating space, and is connected to the negative electrode of the battery cell assembly 2, the bus bar 5 is arranged in the accommodating space, and the two bus bars 5 are connected to the positive electrode column 3 and the negative electrode column 4, thereby forming a current loop between the positive electrode column 3, the negative electrode column 4 and the two bus bars 5. Preferably, the positive electrode column 3, the negative electrode column 4 and the bus bar 5 are all made of conductive materials.

[0043] In this embodiment, if Figure 4 As shown, the positive electrode hole 112 and the negative electrode hole 113 are simultaneously arranged on the first sealing cover 11, and the positive electrode hole 112 and the negative electrode hole 113 are arranged at intervals, thereby shortening the distance between the positive electrode column 3 and the negative electrode column 4 during the assembly process, thereby saving the production cost of the bus 5.

[0044] Preferably, the edge of the positive electrode column 3 is circumferentially welded to the hole wall of the positive electrode hole 112, and the edge of the negative electrode column 4 is circumferentially welded to the hole wall of the negative electrode hole 113 to ensure the sealing of the accommodating space and prevent the cooling medium from leaking out.

[0045] For example, in this embodiment, Figure 2 and Figure 6 As shown, the battery cell assembly 2 includes a plurality of battery cells 21 connected in series and / or in parallel, and the plurality of battery cells 21 are arranged in multiple rows in the thickness direction, and the battery cells 21 in each row are arranged in a straight line. Preferably, there is a gap between two adjacent battery cells 21 in the thickness direction of the battery cells 21, so that the cooling medium can flow between the two battery cells 21, thereby further expanding the heat exchange area. Further preferably, the sides with the smallest surface area of ​​two adjacent battery cells 21 are connected to each other, and the side with the largest surface area of ​​the battery cell 21 is opposite to the first side wall and the second side wall, thereby further optimizing the heat dissipation effect.

[0046] Furthermore, the battery cell assembly 2 also includes an end connector 22, which is connected to the positive pole column 3, the negative pole column 4, and the positive and negative poles of the battery cell assembly 2 to connect the battery cell assembly 2 with the positive pole column 3 and the negative pole column 4. Preferably, in this embodiment, the battery cell 21 has a positive pole ear 211 and a negative pole ear 212 arranged opposite to each other along its length direction, and a plurality of battery cells 21 are connected in series in sequence, and two adjacent columns of battery cells 21 are inverted upside down, so that the positive pole ear 211 of one of the two battery cells 21 closest to the positive pole column 3 / negative pole column 4 in the two most edged columns of battery cells 21 is the positive pole of the battery cell assembly 2, and the positive pole ear 211 is connected to the upper end surface of the end connector 22, and the negative pole ear 212 of the other battery cell 21 is the negative pole of the battery cell assembly 2, and the negative pole ear 212 is connected to the lower end surface of the end connector 22. Preferably, the positive electrode tab 211 and the negative electrode tab 212 are welded to the end connector 22 by laser.

[0047] Furthermore, the present embodiment is also provided with a plurality of intermediate connectors 23, and two adjacent cells 21 in the length direction of the cell 21 are arranged at intervals, and in the two adjacent cells 21 in the length direction of the cell 21, the positive electrode ear 211 / negative electrode ear 212 of one cell 21 is overlapped with the negative electrode ear 212 / positive electrode ear 211 of the other cell 21 and connected to the same intermediate connector 23, preferably, the positive electrode ear 211 / negative electrode ear 212 located on the outside is laser welded to the negative electrode ear 212 / positive electrode ear 211 located on the inside, and the negative electrode ear 212 / positive electrode ear 211 is further laser welded to the intermediate connector 23. And in the two adjacent cells 21 in the thickness direction of the cell 21, the positive electrode ear 211 / negative electrode ear 212 of one cell 21 is laser welded to one side of the intermediate connector 23, and the negative electrode ear 212 / positive electrode ear 211 of the other cell 21 is welded to the opposite side of the intermediate connector 23.

[0048] In this embodiment, the battery cell 21 is arranged in a blade-shaped shell 11, so that the grouping efficiency is high. The battery cell assembly 2 has a first surface and a second surface relative to each other in the thickness direction. The first surface is opposite to and spaced from the first side wall, and the second surface is opposite to and spaced from the second side wall. The cooling medium can contact the first surface and the second surface, thereby expanding the heat exchange area between the battery cell assembly 2 and the cooling medium and improving the heat dissipation efficiency of the battery cell assembly 2.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Immersed blade module, characterized in that: include: A shell (1), the shell (1) being in the shape of a blade, the shell (1) having a first side wall and a second side wall opposite to each other in the thickness direction thereof, a cooling medium flowing inside the shell (1), the shell (1) being provided with a medium inlet (111) and a medium outlet (121), the medium inlet (111) and the medium outlet (121) being opposite to each other, the cooling medium flowing into the inside of the shell (1) through the medium inlet (111) and flowing out through the medium outlet (121); A battery cell assembly (2), wherein the battery cell assembly (2) is arranged inside the housing (1), the battery cell assembly (2) is spaced apart from the medium inlet (111) and the medium outlet (121), the battery cell assembly (2) has a first surface and a second surface opposite to each other in the thickness direction thereof, the first surface is opposite to and spaced apart from the first side wall, the second surface is opposite to and spaced apart from the second side wall, and the cooling medium is capable of contacting the first surface and the second surface.

2. The submerged blade module according to claim 1, characterized in that: The housing (1) comprises a shell, a first sealing cover (11) and a second sealing cover (12); openings are provided at opposite ends of the shell; the first sealing cover (11) and the second sealing cover (12) are respectively engaged with the two openings; and the first sealing cover (11), the shell and the second sealing cover (12) are arranged to form a receiving space; the battery cell assembly (2) is arranged in the receiving space.

3. The submerged blade module according to claim 2, characterized in that: The medium inlet (111) and the medium outlet (121) are respectively provided on the first sealing cover (11) and the second sealing cover (12).

4. The submerged blade module according to claim 2, characterized in that: The housing (1) is provided with positive electrode holes (112) and negative electrode holes (113) at intervals; the positive electrode holes (112) and the negative electrode holes (113) are simultaneously provided on the first sealing cover (11) / the second sealing cover (12); or the positive electrode holes (112) and the negative electrode holes (113) are respectively provided on the first sealing cover (11) and the second sealing cover (12).

5. The submerged blade module according to claim 4, characterized in that: It also includes a positive electrode column (3) and a negative electrode column (4), one end of the positive electrode column (3) is inserted into the positive electrode hole (112) and extends into the accommodating space, and is connected to the positive electrode of the battery cell assembly (2), and one end of the negative electrode column (4) is inserted into the negative electrode hole (113) and extends into the accommodating space, and is connected to the negative electrode of the battery cell assembly (2).

6. The submerged blade module according to claim 5, characterized in that: It also includes two busbars (5), which are arranged in the accommodating space, and the two busbars (5) are connected to the positive pole (3) and the negative pole (4), and the positive pole (3), the negative pole (4) and the two busbars (5) form a loop.

7. The submerged blade module according to claim 5, characterized in that: The battery cell assembly (2) further comprises an end connector (22), wherein the end connector (22) is connected to the positive electrode column (3), the negative electrode column (4), and the positive electrode and negative electrode of the battery cell assembly (2).

8. The submerged blade module according to any one of claims 1 to 7, characterized in that: The battery cell assembly (2) comprises a plurality of battery cells (21) connected in series and / or in parallel, wherein the plurality of battery cells (21) are arranged in at least two rows along the thickness direction thereof, and two adjacent battery cells (21) are arranged at intervals.

9. The submerged blade module according to any one of claims 1 to 7, characterized in that: The cooling medium is insulating coolant or insulating gas.

10. The submerged blade module according to any one of claims 2 to 7, characterized in that: It also comprises an explosion-proof valve (10), wherein the explosion-proof valve (10) is arranged on the first sealing cover (11) and / or the second sealing cover (12).

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