Module end plate assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a module end plate assembly and a battery pack. The module end plate assembly comprises a module end plate which comprises an end plate body and a clamping structure arranged on one surface of the end plate body, and the clamping structure is provided with a clamping groove extending in the length direction of the end plate body; and the cooling pipeline is clamped in the clamping groove, and cooling water circulates in the cooling pipeline. The cooling pipeline is clamped in the clamping groove, then the cooling pipeline is connected with the liquid cooling plate in a pressing mode, during pressing connection, the cooling pipeline is restrained through the module end plate, the cooling pipeline can be prevented from being bent, then pressing connection of the liquid cooling plate and the cooling pipeline is achieved, and the problem that when the cooling pipeline is long, the liquid cooling plate and the cooling pipeline cannot be connected in a pressing mode is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to module end plate subassembly and battery pack. BACKGROUND

[0002] At present, lithium ion batteries are divided into cylindrical batteries, square batteries and soft package batteries according to the appearance structure, and a plurality of batteries are combined through series connection and / or parallel connection to form a battery pack, and the battery pack is widely applied in electric vehicles, energy storage systems, consumer electronic products and other fields.

[0003] The battery pack usually includes a battery module, a liquid cooling plate and a cooling pipeline, the liquid cooling plate and the cooling pipeline are connected in a press connection mode, when the cooling pipeline is relatively long, the cooling pipeline is prone to bending deformation due to the relatively large extrusion force during the press connection, and thus the press connection cannot be completed. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a module end plate subassembly and a battery pack to solve the problem that the liquid cooling plate and the cooling pipeline cannot be press connected when the cooling pipeline is relatively long.

[0005] In a first aspect, the utility model provides a module end plate subassembly, which comprises: a module end plate, comprising an end plate body and a clamping structure arranged on one surface of the end plate body, the clamping structure has a clamping groove extending along the length direction of the end plate body; and a cooling pipeline clamped in the clamping groove, and the cooling pipeline is used for circulating cooling water.

[0006] Beneficial effects: the cooling pipeline is clamped in the clamping groove, and then the cooling pipeline and the liquid cooling plate are press connected, during the press connection, the cooling pipeline is constrained by the module end plate, which can prevent the cooling pipeline from bending, and thus the press connection of the liquid cooling plate and the cooling pipeline is realized, and the problem that the liquid cooling plate and the cooling pipeline cannot be press connected when the cooling pipeline is relatively long is effectively solved.

[0007] In an optional embodiment, the clamping structure comprises at least two protruding parts, and the at least two protruding parts are arranged at intervals along the height direction of the end plate body, and the clamping groove is formed between the adjacent two protruding parts in the height direction.

[0008] Beneficial effects: the cooling pipeline is constrained by the protruding parts, and the stability of fixation is enhanced, and the cooling pipeline is prevented from loosening or shifting.

[0009] In an optional embodiment, the wall bodies of the adjacent two protruding parts are provided with inner limiting protrusions and outer limiting protrusions, and the inner limiting protrusions and the outer limiting protrusions are used for limiting the cooling pipeline in the clamping groove.

[0010] Beneficial effects: The cooling pipeline is double-positioned by the inner limiting protrusion and the outer limiting protrusion, so that the cooling pipeline is prevented from being pulled out of the clamping groove due to vibration, impact or other external forces, and the cooling pipeline is kept in a fixed state to avoid loosening or displacement of the cooling pipeline.

[0011] In an optional embodiment, the inner limiting protrusion, the wall body and the outer limiting protrusion form an arc-shaped clamping surface.

[0012] Beneficial effects: The arc-shaped clamping surface is better matched with the outer surface of the cooling pipeline, increases the contact area, and effectively prevents the cooling pipeline from loosening or displacement.

[0013] In an optional embodiment, the clamping surface is a circular arc surface, and the difference between the diameter of the circle corresponding to the circular arc surface and the diameter of the cooling pipeline is 0-8mm.

[0014] Beneficial effects: The circular arc surface can be perfectly matched with the outer surface of the cooling pipeline, significantly increasing the contact area and further effectively preventing the cooling pipeline from loosening or displacement. By keeping the difference between the diameter of the circle corresponding to the circular arc surface and the diameter of the cooling pipeline within the range of 0-8mm, the assembly of the cooling pipeline in the clamping groove is facilitated, and the assembly difficulty is reduced.

[0015] In an optional embodiment, the protruding portion is provided with a first hollow hole extending along the length direction and penetrating through the two end faces of the protruding portion, and / or the end plate body is provided with a second hollow hole extending along the length direction and penetrating through the two end faces of the end plate body.

[0016] Beneficial effects: The first hollow hole and the second hollow hole can reduce the amount of material used, significantly reduce the weight of the module end plate, and also reduce the manufacturing cost.

[0017] In an optional embodiment, the cooling pipeline includes a pipe body and a plurality of flexible sleeves sleeved on the pipe body, and the plurality of flexible sleeves are arranged at intervals along the extension direction of the pipe body and supported in the clamping groove.

[0018] Beneficial effects: The flexible sleeve has a buffering performance. When there is an error in the process of pressing the water nozzle of the liquid cooling plate and the cooling pipeline, the connection between the liquid cooling plate and the cooling pipeline is completed by extruding the flexible sleeve with the cooling pipeline, which reduces the alignment difficulty, compensates for the assembly error, and effectively solves the problem of coaxiality between the cooling pipeline and the water nozzle.

[0019] In an optional embodiment, the module end plate assembly further includes a plurality of liquid cooling plates, one module end plate is arranged between every two adjacent liquid cooling plates, the liquid cooling plate has a water nozzle, and the water nozzle is press-connected with the corresponding cooling pipeline.

[0020] Beneficial effects: The mechanical deformation of the cooling pipes creates a strong connection between the water nozzle and the cooling pipes, ensuring that the connection will not loosen or fall off. It can effectively resist vibration and impact, maintain long-term stability, and the crimping simplifies the connection between the cooling pipes and the liquid cooling plate, eliminating the need for quick-connect fittings, thus reducing costs and saving space. The structure is more compact, improving sealing reliability, reducing the risk of coolant leakage, and improving the safety of the battery pack.

[0021] In one optional embodiment, the liquid cooling plate includes a liquid cooling plate body and a fixing plate, the fixing plate being disposed on at least one side of the liquid cooling plate body and fixedly connected to the module end plate.

[0022] Beneficial effects: By fixing the liquid cooling plate to the module end plate, the liquid cooling plate and the module end plate are formed into an integral structure, which enhances the rigidity and stability of the battery pack and can effectively prevent the liquid cooling plate from shifting or loosening due to vibration or impact.

[0023] Secondly, this utility model also provides a battery pack, including: a battery module; and the aforementioned module end plate assembly, wherein the module end plate of the module end plate assembly is disposed at one end of the battery module. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a perspective view of a module end plate assembly according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 A cross-sectional view of the battery end plate and cooling pipes shown;

[0027] Figure 3 for Figure 2 The diagram shows the structure of the battery end plate.

[0028] Figure 4 for Figure 1 A 3D view of the cooling piping shown;

[0029] Figure 5 for Figure 1 The diagram shows a three-dimensional view of the liquid cooling plate.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1、Module end plate; 101, end plate body; 1011, second hollow hole; 102, protruding part; 1021, clamping groove; 1022, inner limiting protrusion; 1023, outer limiting protrusion; 1024, first hollow hole;

[0032] 2, Cooling pipeline; 201, pipe body; 202, flexible sleeve;

[0033] 3, Liquid cooling plate; 301, liquid cooling plate body; 302, fixed sheet; 303, water nozzle. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0035] In the related art, the number of liquid cooling plates is several, the spacing between two adjacent liquid cooling plates is small, the length of the cooling pipeline is short, for example, the length of the cooling pipeline is about 60mm, direct crimping can be carried out when the pipeline is short, when the cooling pipeline is long, the cooling pipeline will be unstable due to the large extrusion force, and cannot be crimped.

[0036] In order to solve the problem that the long cooling pipeline cannot be crimped, the embodiments of the utility model will be described below in combination with Figures 1 to 5 , the embodiments of the utility model.

[0037] According to the embodiments of the utility model, on the one hand, a module end plate assembly is provided, which comprises: a module end plate 1 and a cooling pipeline 2, the module end plate 1 comprises an end plate body 101 and a clamping structure arranged on one surface of the end plate body 101, the clamping structure has a clamping groove 1021 extending along the length direction of the end plate body 101; the cooling pipeline 2 is clamped in the clamping groove 1021, and the cooling pipeline 2 is used for circulating cooling water.

[0038] The module end plate assembly of the embodiment is applied, the cooling pipeline 2 is clamped in the clamping groove 1021, and then the cooling pipeline 2 is crimped with the liquid cooling plate 3. When crimping, the cooling pipeline 2 is constrained by the module end plate 1, which can prevent the cooling pipeline 2 from bending, thereby realizing the crimping of the liquid cooling plate 3 and the cooling pipeline 2, and effectively solving the problem that the liquid cooling plate 3 and the cooling pipeline 2 cannot be crimped when the cooling pipeline 2 is long.

[0039] Further, the cooling pipeline 2 is pressed into the clamping groove 1021 by cold pressing process, which can realize cost reduction and space saving, and the cooling pipeline 2 is integrated with the module end plate 1, which can realize online cold pressing of the cooling pipeline 2 with a length greater than or equal to 100 mm, and simplify the production line tooling.

[0040] In one embodiment, the clamping structure includes at least two protrusions 102, which are arranged at intervals along the height direction of the end plate body 101, and a clamping groove 1021 is formed between adjacent two protrusions 102 in the height direction. The protrusions 102 constrain the cooling pipeline 2, enhancing the stability of the fixation and preventing the cooling pipeline 2 from loosening or shifting.

[0041] It can be understood that the clamping structure can also adopt other structures and is not limited thereto.

[0042] In one embodiment, the wall bodies of the adjacent two protrusions 102 are provided with inner limiting protrusions 1022 and outer limiting protrusions 1023, which are used to limit the cooling pipeline 2 in the clamping groove 1021. The inner limiting protrusions 1022 and the outer limiting protrusions 1023 double-limit the cooling pipeline 2, preventing the cooling pipeline 2 from being pulled out of the clamping groove 1021 due to vibration, impact or other external forces, and keeping the cooling pipeline 2 in a fixed state to avoid loosening or shifting of the cooling pipeline 2.

[0043] Further, the inner limiting protrusions 1022, the wall bodies and the outer limiting protrusions 1023 form an arc-shaped clamping surface. The arc-shaped clamping surface better fits the outer surface of the cooling pipeline 2, increasing the contact area and effectively preventing the cooling pipeline 2 from loosening or shifting.

[0044] Further, the clamping surface is a circular arc surface, and the difference between the diameter of the circle corresponding to the circular arc surface and the diameter of the cooling pipeline 2 is 0-8 mm. The circular arc surface can perfectly fit the outer surface of the cooling pipeline 2, significantly increasing the contact area and further effectively preventing the cooling pipeline 2 from loosening or shifting. By setting the difference between the diameter of the circle corresponding to the circular arc surface and the diameter of the cooling pipeline 2 within the range of 0-8 mm, the assembly of the cooling pipeline 2 in the clamping groove 1021 is facilitated, and the assembly difficulty is reduced.

[0045] In one embodiment, the protrusion 102 is provided with a first hollow hole 1024 extending along the length direction and penetrating through the two end faces of the protrusion 102, and the end plate body 101 is provided with a second hollow hole 1011 extending along the length direction and penetrating through the two end faces of the end plate body 101. The first hollow hole 1024 and the second hollow hole 1011 can reduce the material usage, significantly reduce the weight of the module end plate 1, and also reduce the manufacturing cost.

[0046] Further, the second hollow hole 1011 is in a plurality, and the plurality of second hollow holes 1011 are arranged at intervals along the height direction of the module end plate 1. The module end plate 1 is a hollow structure and can be formed by one-time molding such as injection molding, thereby reducing the subsequent complex processing steps.

[0047] It can be understood that the hollow hole can also not be arranged on the protruding portion 102 and the end plate body 101.

[0048] In an embodiment, the cooling pipeline 2 includes a pipe body 201 and a plurality of flexible sleeves 202 sleeved on the pipe body 201. The plurality of flexible sleeves 202 are arranged at intervals along the extension direction of the pipe body 201 and are supported in the clamping groove 1021. The flexible sleeve 202 has a buffering performance. When there is an error in the process of pressure connecting the water nozzle 303 of the liquid cooling plate 3 and the cooling pipeline 2, the connection between the liquid cooling plate 3 and the cooling pipeline 2 is completed by extruding the flexible sleeve 202 of the cooling pipeline 2, the alignment difficulty is reduced, the assembly error is compensated, and the coaxiality problem of the cooling pipeline 2 and the water nozzle 303 is effectively solved.

[0049] In an embodiment, the end plate body 101 and the protruding portion 102 are integrally formed, and the module end plate 1 adopts an integrated design, which is convenient for processing and manufacturing and reduces the cost.

[0050] Further, the module end plate 1 is formed by plastic extrusion. The density of plastic is lower than that of metal, which can reduce the weight of the module end plate 1 and further reduce the overall weight. Moreover, the plastic extrusion process is simple and efficient, which reduces the production cost.

[0051] It can be understood that in another embodiment, the module end plate 1 adopts a roller pressing steel process or a die casting process to meet the constraint function of the cooling pipeline.

[0052] In the related art, when the cooling pipeline is long, the water nozzle of the liquid cooling plate is usually connected by a quick connector. The number of quick connectors is large, the cost is high, the occupied size is large, and the structure is not compact. Due to the existence of the quick connector, the number of adapter interfaces is large, and the sealing reliability is reduced.

[0053] To solve the above problems, in an embodiment, the module end plate assembly further includes a plurality of liquid cooling plates 3. One module end plate 1 is arranged between any two adjacent liquid cooling plates 3. The liquid cooling plate 3 has a water nozzle 303, and the water nozzle 303 is pressure connected with the corresponding cooling pipeline 2. The mechanical deformation of the cooling pipeline 2 forms a firm connection between the water nozzle 303 and the cooling pipeline 2, ensures that the connection between the two will not loosen or fall off, can effectively resist vibration and impact, maintain long-term stability, and simplify the connection between the cooling pipeline 2 and the liquid cooling plate 3 by pressure connection. No quick connector is needed, which reduces the cost and saves space, the structure is more compact, improves the sealing reliability, reduces the risk of cooling liquid leakage, and improves the safety of the battery pack.

[0054] In one embodiment, the liquid cooling plate 3 comprises a liquid cooling plate body 301 and a fixing sheet 302 arranged on at least one side of the liquid cooling plate body 301, and the fixing sheet 302 is fixedly connected with the module end plate 1. By fixing the fixing sheet 302 with the module end plate 1, the liquid cooling plate 3 and the module end plate 1 form an integral structure, thereby enhancing the rigidity and stability of the battery pack and effectively preventing the liquid cooling plate 3 from being displaced or loosened due to vibration or impact.

[0055] Further, the length of the protruding part 102 is less than the length of the end plate body 101, and both ends of the protruding part 102 form a recessed groove, and the recessed groove is arranged to facilitate the connection of the fixing sheet 302 with the end plate body 101.

[0056] Further, the end plate body 101 and the fixing sheet 302 are connected through fastening components, and the fastening components comprise bolts and nuts.

[0057] According to the embodiments of the utility model, on the other hand, a battery pack is also provided, which comprises a battery module and the above-mentioned module end plate assembly, and the module end plate 1 of the module end plate assembly is arranged at one end of the battery module.

[0058] Although the embodiments of the utility model are described in combination with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A module endplate assembly, characterized in that, include: The module end plate (1) includes an end plate body (101) and a snap-fit ​​structure disposed on one surface of the end plate body (101), the snap-fit ​​structure having a slot (1021) extending along the length direction of the end plate body (101). Cooling pipe (2) is installed in the slot (1021) and cooling water is circulated in the cooling pipe (2).

2. The module end plate assembly according to claim 1, characterized in that, The snap-fit ​​structure includes at least two protrusions (102), which are spaced apart along the height direction of the end plate body (101). In the height direction, a slot (1021) is formed between two adjacent protrusions (102).

3. The module end plate assembly according to claim 2, characterized in that, The two adjacent protrusions (102) have an inner limiting protrusion (1022) and an outer limiting protrusion (1023) on their opposing walls. The inner limiting protrusion (1022) and the outer limiting protrusion (1023) are used to limit the cooling pipe (2) in the slot (1021).

4. The module endplate assembly according to claim 3, characterized in that, The inner limiting protrusion (1022), the wall, and the outer limiting protrusion (1023) form an arc-shaped snap-fit ​​surface.

5. The module endplate assembly according to claim 4, characterized in that, The snap-fit ​​surface is an arc surface, and the difference between the diameter of the circle corresponding to the arc surface and the diameter of the cooling pipe (2) is 0-8mm.

6. The module endplate assembly according to claim 2, characterized in that, The protrusion (102) is provided with a first hollow hole (1024) extending along the length direction and penetrating both ends of the protrusion (102), and / or, the end plate body (101) is provided with a second hollow hole (1011) extending along its length direction and penetrating both ends of the end plate body (101).

7. The module endplate assembly according to any one of claims 1 to 6, characterized in that, The cooling pipe (2) includes a pipe body (201) and a plurality of flexible sleeves (202) sleeved on the pipe body (201). The plurality of flexible sleeves (202) are spaced apart along the extension direction of the pipe body (201) and supported in the slot (1021).

8. The module endplate assembly according to any one of claims 1 to 6, characterized in that, The module end plate assembly also includes several liquid cooling plates (3), and a module end plate (1) is provided between several adjacent liquid cooling plates (3). The liquid cooling plate (3) has a water nozzle (303), and the water nozzle is crimped to the corresponding cooling pipe (2).

9. The module end plate assembly according to claim 8, characterized in that, The liquid cooling plate (3) includes a liquid cooling plate body (301) and a fixing plate (302). The fixing plate (302) is disposed on at least one side of the liquid cooling plate body (301) and is fixedly connected to the module end plate (1).

10. A battery pack, characterized in that, include: Battery module; The module end plate assembly according to any one of claims 1 to 9, wherein the module end plate (1) of the module end plate assembly is disposed at one end of the battery module.

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