Interface structure of battery cell liquid cooling channel

Abstract

The utility model provides an interface structure of a battery cell liquid cooling channel, which comprises liquid cooling connecting assemblies respectively arranged at two ends of a battery cell body, each liquid cooling connecting assembly comprises a base, a sealing rubber ring and a buckling cover piece, the base is fixedly connected to one end of the battery cell body, one end of the buckling cover piece is buckled on the base, and the other end of the buckling cover piece is connected with the battery cell body. And a sealing rubber ring is arranged between the cover buckling piece and the base. According to the interface structure of the battery cell liquid cooling channel, the sealing rubber ring is arranged between the buckling cover piece and the base, the sealing rubber ring is used for sealing the buckling cover piece and the base, the buckling cover piece is buckled on the base, the operation is simple due to a buckling type buckling structure, on one hand, the production efficiency is effectively improved, and on the other hand, the production cost is reduced; and on the other hand, more possibilities are provided for maintenance and replacement of the battery cell, and the liquid cooling connection assembly adopts a split design, so that the processing difficulty of each part is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electric core cooling, especially an interface structure of electric core liquid cooling channel. BACKGROUND

[0002] Thermal management has been the research focus in the field of new energy, and liquid cooling is a common traditional cooling method. With the continuous improvement of customer's use demand, the cooling effect of electric core has also been higher, and many studies have integrated the traditional liquid cooling method directly into the electric core, that is, inserting the electric core into the core rod, and the core rod is used as a hollow structure as a liquid cooling channel. In order to have a better integration rate of electric core products, rectangular or special-shaped products are most common. Taking the current rectangular product as an example, the shape of the core rod liquid cooling structure is rectangular or racetrack type. This liquid cooling structure increases the connection difficulty between products. SUMMARY

[0003] Therefore, the utility model aims at providing an interface structure of electric core liquid cooling channel to solve the problem of difficult operation of connecting external accessories of the liquid cooling channel of the core rod in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] An interface structure of electric core liquid cooling channel, comprising liquid cooling connection assemblies arranged at both ends of an electric core body, each liquid cooling connection assembly comprising a base, a sealing rubber ring and a cover piece, the base being fixedly connected to one end of the electric core body, one end of the cover piece being buckled to the base, and the sealing rubber ring being arranged between the cover piece and the base.

[0006] Further, the base comprises a base body, a second welding platform is arranged on the inner edge of the base body, a second liquid cooling channel is arranged in the middle of the base body, a plurality of buckle through holes are arranged on the base body, and the plurality of buckle through holes are arranged circumferentially along the outer periphery of the liquid cooling channel. A buckle shoulder is arranged in each buckle through hole.

[0007] Further, the cover piece comprises a cover body, an elbow structure, a buckle structure and a pagoda interface structure, the elbow structure is arranged at one end of the cover body, a plurality of buckle structures are arranged at the lower end of the cover body, the buckle structures correspond to the buckle through holes one by one, and the pagoda interface structure is installed at one end of the outer head structure.

[0008] Further, the electric core body comprises a core rod body, a winding core, a bus bar, an adapter plate and a cover plate assembly arranged in the shell respectively, the winding core is arranged on the outer periphery of the core rod body, the two ends of the winding core are connected to one cover plate assembly through one bus bar respectively, the adapter plate is arranged between the bus bar and the cover plate assembly, and one liquid cooling connection assembly is fixedly installed on the outer side of each cover plate assembly.

[0009] Further, the core rod body is internally provided with a cavity, and a plurality of support beams are arranged in the cavity, the plurality of support beams are arranged in parallel with each other, and first liquid cooling channels are formed between every two support beams, and the first liquid cooling channels are communicated with the elbow structure through the second liquid cooling channels.

[0010] Further, both ends of the winding core are respectively provided with cut corners, and the bus bars, the adapter plates and the two sides of the cover plate assembly are embedded into the cut corners.

[0011] Further, the winding core is provided with a positioning hole in the middle for assembly positioning.

[0012] Further, the cover plate assembly comprises a cover plate body, the cover plate body is mounted to one end of the shell, the cover plate body is provided with a first through hole in the middle, the first liquid cooling channels are communicated with the elbow structure through the second liquid cooling channels and the first through hole in sequence, a core rod welding platform is arranged on the cover plate body and located at the periphery of the first through hole, the core rod body is connected to the core rod welding platform, a first welding platform is arranged at the periphery of the core rod welding platform, and the first welding platform is connected to the base.

[0013] Compared with the prior art, the interface structure of the electric core liquid cooling channel has the following beneficial effects: a sealing rubber ring is arranged between the buckle cover and the base, the sealing rubber ring is used for sealing this part, the buckle cover is buckled on the base, the buckle type buckling structure is simple to operate, on the one hand, the production efficiency is effectively improved, on the other hand, the maintenance and replacement of the electric core are provided with more possibilities, and the liquid cooling connection assembly adopts a split type design, thereby reducing the machining difficulty of each part. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings constituting a part of the present application are used to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 It is a structure schematic view of the interface structure of the electric core liquid cooling channel;

[0016] Figure 2 It is an explosion structure schematic view of the interface structure of the electric core liquid cooling channel;

[0017] Figure 3 It is a cross-sectional view of the winding core;

[0018] Figure 4 It is a front view of the winding core;

[0019] Figure 5 It is a rear view of the cover plate body;

[0020] Figure 6 A front view schematic diagram of the cover plate body according to an embodiment of the utility model;

[0021] Figure 7 An explosion structure schematic diagram of the liquid cooling connection assembly according to an embodiment of the utility model;

[0022] Figure 8 A front view schematic diagram of the base according to an embodiment of the utility model;

[0023] Figure 9 A side view schematic diagram of the base according to an embodiment of the utility model;

[0024] Figure 10 A rear view schematic diagram of the base according to an embodiment of the utility model;

[0025] Figure 11 A structure schematic diagram of the base according to an embodiment of the utility model;

[0026] Figure 12 A side view schematic diagram of the liquid cooling connection assembly according to an embodiment of the utility model;

[0027] Figure 13 A lower view schematic diagram of the liquid cooling connection assembly according to an embodiment of the utility model;

[0028] Figure 14 A structure schematic diagram of the cover body and elbow structure cooperation according to an embodiment of the utility model;

[0029] Figure 15 A structure schematic diagram of the cover piece according to an embodiment of the utility model;

[0030] Explanation of reference signs:

[0031] 1-liquid cooling connection assembly; 11-base; 1101-second liquid cooling channel; 1102-buckle through hole; 1103-buckle shoulder platform; 1104-second welding platform; 12-sealing rubber ring; 1201-liquid cooling channel through hole; 13-cover piece; 131-cover body; 132-elbow structure; 133-buckle structure; 134-pagoda interface structure; 1301-sealing ring embedding groove; 1302-cover inner channel hole; 1303-cover outer channel hole; 2-electricity core body; 21-core rod body; 22-winding core; 2201-first liquid cooling channel; 2202-supporting ridge; 2203-angle cut; 2204-positioning hole; 23-converging sheet; 24-adapter sheet; 25-cover plate assembly; 251-cover plate body; 2511-first through hole; 2512-core rod welding platform; 2513-first welding platform; 26-outer shell. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0033] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0034] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] As shown in the drawings, Figures 1-15 An interface structure of a battery cell liquid cooling channel, comprising liquid cooling connection assemblies 1 arranged at both ends of a battery cell body 2 respectively, each liquid cooling connection assembly 1 comprising a base 11, a sealing rubber ring 12 and a cover piece 13, the base 11 is fixedly connected to one end of the battery cell body 2, one end of the cover piece 13 is buckled to the base 11, and the sealing rubber ring 12 is arranged between the cover piece 13 and the base 11, the sealing rubber ring 12 is used for sealing this part, and the cover piece 13 is buckled on the base 11, the buckle type buckling structure is simple to operate, on the one hand, it effectively improves the production efficiency, on the other hand, it provides more possibilities for the maintenance and replacement of the battery cell, and the liquid cooling connection assembly 1 adopts a split type design, which reduces the machining difficulty of each part, in the embodiment, the base 11 is made of aluminum material, the sealing rubber ring 12 is made of fluororubber or ethylene propylene diene rubber, and the cover piece 13 is made of PP+ABS material.

[0037] The base 11 comprises a base 11 body, a second welding platform 1104 is arranged at the inner edge of the base 11 body, a second liquid cooling channel 1101 is arranged at the middle of the base 11 body, and a plurality of buckle through holes 1102 are arranged on the base 11 body and are arranged circumferentially along the outer periphery of the liquid cooling channel, and a buckle shoulder 1103 is arranged in each buckle through hole 1102.

[0038] The cover piece 13 comprises a cover body 131, an elbow structure 132, a buckle structure 133 and a pagoda interface structure 134, the elbow structure 132 is arranged at one end of the cover body 131, a plurality of buckle structures 133 are arranged at the lower end of the cover body 131, and the buckle structures 133 correspond to the buckle through holes 1102 one by one, the pagoda interface structure 134 is installed at one end of the outer structure, and the combination of the elbow structure 132 and the pagoda interface structure 134 converts the special-shaped size of the liquid cooling interface into a circular size, increases the compatibility, is convenient for adapting to different assembly conditions, and meets various production and use conditions.

[0039] The cell body 2 comprises a core rod body 21, a winding core 22, a bus bar 23, an adapter piece 24 and a cover plate assembly 25 arranged in the shell 26 respectively, the winding core 22 is arranged at the periphery of the core rod body 21, the two ends of the winding core 22 are connected to one cover plate assembly 25 through one bus bar 23 respectively, and the adapter piece 24 is arranged between the bus bar 23 and the cover plate assembly 25, one liquid cooling connection assembly 1 is fixedly installed at the outer side of each cover plate assembly 25, the winding core 22 comprises a positive plate, a negative plate and a diaphragm, and is wound on the core rod body 21 in a laminated structure of diaphragm-negative plate-diaphragm-positive plate through winding, wherein the tabs of the positive plate and the negative plate are at different sides in the winding process, the core rod body 21 is made of a metal material, such as aluminum, copper or other high thermal conductivity materials, the bus bar 23 is made of a metal material, such as aluminum, copper and the like, the adapter piece 24 is made of a metal material, such as aluminum, copper and the like, the cover plate body 251 is made of a metal aluminum material, the shell 26 is made of a metal material, such as aluminum, steel and the like, and the structure is a double-through opening.

[0040] The core rod body 21 is provided with a cavity, and a plurality of support beams 2202 are arranged in the cavity. The plurality of support beams 2202 are arranged in parallel with each other, and the first liquid cooling channel 2201 is formed between every two support beams 2202. The first liquid cooling channel 2201 is connected with the elbow structure 132 through the second liquid cooling channel 1101. The two ends of the winding core 22 are respectively provided with a cut corner 2203. The bus bar 23, the adapter plate 24 and the two sides of the cover plate assembly 25 are embedded into the cut corner 2203. The design of the cut corner 2203 type core rod reduces the extrusion precision requirement of the core rod, and the size of the opening of the cover plate is effectively reduced, the utilization rate of the cover plate is provided, the design difficulty of the pole, the explosion-proof valve and the liquid injection hole is reduced, and in order to facilitate the assembly of the battery core body 2, the middle part of the winding core 22 is provided with a positioning hole 2204 for assembly positioning.

[0041] The cover plate assembly 25 comprises a cover plate body 251. The cover plate body 251 is installed to one end of the shell 26. The middle part of the cover plate body 251 is provided with a first through hole 2511. The first liquid cooling channel 2201 is connected with the elbow structure 132 through the second liquid cooling channel 1101 and the first through hole 2511 in sequence. The core rod welding platform 2512 is arranged on the cover plate body 251, and the core rod welding platform 2512 is located at the periphery of the first through hole 2511. The core rod body 21 is connected to the core rod welding platform 2512. The first welding platform 2513 is arranged at the periphery of the core rod welding platform 2512. The first welding platform 2513 is connected to the base 11. The core rod body 21, the cover plate body 251 and the liquid cooling connection assembly 1 are all connected by laser welding. The sub-parts of the liquid cooling connection assembly 1 are connected by buckling. In addition, the sealing rubber ring 12 is arranged to ensure the sealing performance and the assembly operability.

[0042] An interface structure of a battery core liquid cooling channel, which is connected in the following way:

[0043] a) The laminated structure of the diaphragm, the negative plate, the diaphragm and the positive plate is wound on the core rod body 21 in a winding manner. The tabs on both sides are treated by shaping and flattening. Then, the bus bar 23 and the adapter plate 24 are welded in sequence. The cover plate assembly 25 is welded with the adapter plate 24 in advance. Then, the battery core body 2 is put into the shell. The shell 26, the core rod and the cover plate body 251 are assembled and welded together. The end face of the core rod is laser welded with the core rod welding platform 2512 of the cover plate body 251. The aluminum shell is laser welded with the cover plate body 251 to achieve sealing. The assembly of the battery core body 2 is completed.

[0044] b) The assembled battery core body 2 is used as a raw material. The base 11 is buckled into the platform base 11 welding platform pre-installed on the cover plate. The base 11 welding platform is laser welded with the base 11 welding platform to achieve sealing connection (this process is perpendicular to the cover plate plane without obstruction, which is convenient for welding operation);

[0045] c) the sealing rubber ring 12 is pre-inserted into the sealing ring embedding groove 1301 in the cover member 13, and then positioned and buckled by the buckling structure 133 of the cover member 13 and the buckling through hole 1102 on the base 11, an external force is applied on the cover body 131 of the cover member 13 to extrude the cover member 13 towards the battery core body 2, the buckling structure 133 is forced to shrink inwards, and then the buckling structure 133 is extruded to buckle the buckling shoulder 1103 on the base 11, the sealing is fixed, and at this time, the sealing rubber ring 12 has reached a preset compression amount.

[0046] d) the pagoda interface structure 134 of the cover member 13 can be used to connect the battery core body 2 in series and parallel and lead out externally through an external circular tube.

[0047] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and 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. An interface structure of a liquid cooling channel of a battery cell, characterized by: The liquid cooling connecting assembly (1) is arranged at both ends of the battery cell body (2), each liquid cooling connecting assembly (1) comprises a base (11), a sealing rubber ring (12) and a cover piece (13), the base (11) is fixedly connected to one end of the battery cell body (2), one end of the cover piece (13) is buckled to the base (11), and the sealing rubber ring (12) is arranged between the cover piece (13) and the base (11).

2. The interface structure of a liquid cooling channel of a battery cell according to claim 1, characterized in that: The base (11) comprises a base (11) body, a second welding platform (1104) is arranged on the inner edge of the base (11) body, a second liquid cooling channel (1101) is arranged in the middle of the base (11) body, and a plurality of buckle through holes (1102) are arranged on the base (11) body, and the plurality of buckle through holes (1102) are arranged circumferentially along the outer periphery of the liquid cooling channel, and a buckle shoulder (1103) is arranged in each buckle through hole (1102).

3. The interface structure of a liquid cooling channel of a battery cell according to claim 1, characterized in that: The cover piece (13) comprises a cover body (131), an elbow structure (132), a buckle structure (133) and a pagoda interface structure (134), the elbow structure (132) is arranged at one end of the cover body (131), a plurality of buckle structures (133) are arranged at the lower end of the cover body (131), the buckle structures (133) correspond to the buckle through holes (1102) one by one, and the one end of the outer head structure is provided with the pagoda interface structure (134).

4. The interface structure of a liquid cooling channel of a battery cell according to claim 1, characterized in that: The battery cell body (2) comprises a shell (26) in which a core rod body (21), a winding core (22), a bus bar (23), an adapter plate (24) and a cover plate assembly (25) are arranged, the winding core (22) is arranged on the outer periphery of the core rod body (21), the two ends of the winding core (22) are connected to the cover plate assembly (25) through the bus bar (23), the adapter plate (24) is arranged between the bus bar (23) and the cover plate assembly (25), and one liquid cooling connecting assembly (1) is fixedly installed on the outer side of each cover plate assembly (25).

5. The interface structure of a liquid cooling channel of a battery cell according to claim 4, characterized in that: The core rod body (21) is provided with a cavity, and a plurality of support beams (2202) are arranged in the cavity, the plurality of support beams (2202) are arranged in parallel with each other, and the first liquid cooling channel (2201) is formed between two support beams (2202), and the first liquid cooling channel (2201) is connected with the elbow structure (132) through the second liquid cooling channel (1101).

6. The interface structure of a liquid cooling channel of a battery cell according to claim 4, characterized in that: The winding core (22) is provided with a cut corner (2203) at both ends, and the bus bar (23), the adapter plate (24) and the cover plate assembly (25) are embedded into the cut corner (2203).

7. The interface structure of a liquid cooling channel of a battery cell according to claim 4, characterized in that: The winding core (22) is provided with a positioning hole (2204) in the middle for assembly positioning.

8. The interface structure of a liquid cooling channel of a battery cell according to claim 4, characterized in that: The cover plate assembly (25) comprises a cover plate body (251) mounted to one end of the shell (26), a first through hole (2511) is arranged in the middle of the cover plate body (251), the first liquid cooling channel (2201) is connected with the elbow structure (132) in sequence through the second liquid cooling channel (1101), the first through hole (2511) and the core rod welding platform (2512) is arranged on the cover plate body (251), and the core rod welding platform (2512) is located on the periphery of the first through hole (2511), the core rod body (21) is connected to the core rod welding platform (2512), and the first welding platform (2513) is arranged on the periphery of the core rod welding platform (2512), and the first welding platform (2513) is connected to the base (11).

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