CTP battery pack box body

Abstract

The utility model discloses a CTP battery pack box body which comprises an open box body, a liquid cooling plate fixedly arranged on the box body, and a liquid cooling assembly arranged on the side edge of the box body, the liquid cooling assembly comprises a liquid cooling pipe, a water nozzle connected with the liquid cooling pipe, a water box connected with the water nozzle, and a water inlet pipe and a water outlet pipe which are connected with the liquid cooling pipe; the extending ends of the water inlet pipe and the water outlet pipe penetrate out of the box body. The liquid cooling plate and the box body are connected into a whole, large support can be provided for the strength and rigidity of the box body, the structural compactness is improved by combining the design of the receding grooves, the cross beams and the like, and the problem that the overall strength and cost saving of the battery pack cannot be considered at the same time in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery PACK, in particular to a CTP battery pack box. Background Art

[0002] The existing battery pack structures are mainly MTP and CTP. MTP refers to the modules composed of cells, which are then assembled into battery packs (PACK), that is, "cells-modules-battery packs (PACK)". CTP, on the other hand, is the process of directly assembling cells into battery packs, eliminating the assembly process of module assembly. CTP has the characteristics of compact structure, light weight, and high space utilization, and has become the mainstream technology of many battery manufacturers.

[0003] At present, the traditional CTP battery pack box adopts sheet metal stamping structure or aluminum extrusion profile. The cost of aluminum extrusion profile is high and the production efficiency is low, while sheet metal stamping has the problem of insufficient strength. Utility Model Content

[0004] The purpose of the utility model is to provide a CTP battery pack case, in which the liquid cooling plate is an aluminum extruded profile, and due to its structural characteristics, it has strong structural strength and rigidity. However, the stamped case has a thinner skin and usually has poor strength. The liquid cooling plate in the utility model is connected to the case as a whole, which can provide greater support for the strength and rigidity of the case, solving the problem in the prior art that the overall strength of the battery pack and cost savings cannot be taken into account at the same time.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A CTP battery pack box comprises an open box, a liquid cooling plate fixed on the box, and a liquid cooling assembly arranged on the side of the box; the liquid cooling assembly comprises a liquid cooling pipe, a water nozzle connected to the liquid cooling pipe, a water box connected to the water nozzle, and a water inlet pipe and a water outlet pipe connected to the liquid cooling pipe; the extended ends of the water inlet pipe and the water outlet pipe are both arranged to pass through the outside of the box.

[0007] A further solution: the water nozzle and the water box are symmetrically arranged on both sides of the box body, and the liquid cooling pipe includes a main pipeline and an auxiliary pipeline arranged on the two sides of the box body, wherein the water inlet pipe and the water outlet pipe are both connected to the main pipeline.

[0008] A further solution includes a crossbeam, wherein the bottom of the crossbeam is connected to the box body, and the two ends of the crossbeam are connected to the side walls of the box body.

[0009] A further solution is that a side edge of the box body on which the liquid cooling assembly is mounted is provided with an avoidance groove for accommodating a water box.

[0010] Further solution: The other two sides of the box body have a corrugated structure, and the liquid cooling plate has an outer contour matching the corrugated structure.

[0011] Further solution: The water nozzle is threadedly connected to the water box, and a sealing glue is applied at the connection to prevent water leakage.

[0012] Further solution: The box body and the liquid cooling plate are fixedly connected by fasteners.

[0013] Further solution: A high-voltage plug-in interface is provided on the side wall of the box body.

[0014] Further solution: The material of the liquid cooling plate is aluminum extrusion profile.

[0015] Further solution: The box body is a sheet metal stamping plate.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] By embedding the liquid cooling plate in the box body to form an integral structure, the overall strength is improved. At the same time, cross beams are arranged in the box body to further enhance the structural stability of the box body. In addition, the cross beams also have a partitioning function and serve as the fixed ends of the battery cells, improving the stacking order.

[0018] Through the position and mechanism design of the liquid cooling component and the setting of the avoidance groove, sufficient space is provided for the stacking of the battery cells, increasing the structural compactness and indirectly enhancing the overall strength of the battery pack. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure diagram of the embodiment;

[0020] Figure 2 It is an exploded view of the structure of the embodiment;

[0021] In the figure: 1 - box body, 11 - mounting hole, 12 - avoidance groove, 13 - corrugated structure, 2 - liquid cooling plate, 3 - liquid cooling component, 31 - liquid cooling pipe, 311 - main pipeline, 312 - auxiliary pipeline, 32 - water nozzle, 33 - water box, 34 - water inlet pipe, 4 - cross beam, 5 - high-voltage plug-in interface, 6 - fastener. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model.

[0024] Please refer to Figures 1-2 , a CTP battery pack box body, including an open box body 1, a liquid cooling plate 2 fixedly arranged on the box body 1, and a liquid cooling component 3 arranged on the side of the box body 1; the liquid cooling component 3 includes a liquid cooling pipe 31, a water nozzle 32 connected to the water outlet end of the liquid cooling pipe 31, a water box 33 connected to the water nozzle 32, and a water inlet pipe 34 connected to the water inlet end of the liquid cooling pipe 31; the extending end of the water inlet pipe 34 is arranged outside the box body 1. The liquid cooling plate 2 is embedded and connected to the bottom of the box body 1, and the two are connected as a whole, increasing the overall strength and stiffness. The water box 33 is communicated with the embedded flow channel of the liquid cooling plate 2, and all the water nozzles 32 and the water box 33 form a series circuit with the flow channel. The refrigerant enters the liquid cooling pipe 31 through the water inlet pipe 34, and then enters the flow channel of the liquid cooling plate 2 through the water nozzle 32 and the water box 33, and flows uniformly in the liquid cooling plate 2, thereby effectively absorbing and taking away the battery heat. The heated refrigerant flows out through the water outlet pipe 35, and then exchanges heat with the heat exchange device, and after cooling again, it circulates through the water inlet 34 to the liquid cooling plate 2.

[0025] Furthermore, two mounting holes 11 are opened on the side wall of the box body 1, which are respectively used to accommodate the water inlet pipe 34 and the water outlet pipe 35, so that the water inlet pipe 34 and the water outlet pipe 35 are led out from the side, giving the box body 1 the largest possible space for placing the battery cells.

[0026] Furthermore, the water nozzles 32 and the water box 33 are symmetrically arranged on both sides of the box body 1. The liquid cooling pipe 31 includes a main pipeline 311 and an auxiliary pipeline 312 arranged on both sides of the box body 1. Among them, the water inlet pipe 34 and the water outlet pipe 35 are both connected to the main pipeline 311. The main function of the auxiliary pipeline 312 is to connect the water nozzles 32 on this side in series, so it is set as several U-shaped pipes.

[0027] Furthermore, the present utility model further includes a cross beam 4. The bottom of the cross beam 4 is connected to the box body 1, and both ends of the cross beam 4 are connected to the side wall of the box body 1. This cross beam 4 not only increases the strength of the entire box body, but also divides the box body 1 into two areas for stacking the battery cells. One side of the battery cells is installed on the inner wall of the box body 1, and the other side is installed on the side wall of the cross beam 4.

[0028] Further, an avoidance groove 12 for accommodating the water box 33 is provided on the side of the box body 1 where the liquid cooling component 3 is installed. This avoidance groove 12 provides the box body 1 with the largest possible space for placing the battery cells.

[0029] Further, the other two sides of the box body 1 have a corrugated structure 13, and the liquid cooling plate 2 has an outer contour matching the corrugated structure 13. The liquid cooling plate 2 with a corrugated edge helps to disperse stress and reduce the phenomenon of stress concentration. When the material is subjected to an external force, the corrugated edge can guide the stress to be distributed in a wider area, thereby reducing the stress peak value in the local area. The design of the corrugated edge effectively resists external loads by increasing the bending stiffness and torsional stiffness of the material itself, reducing the deformation of the structure.

[0030] Further, the water nozzle 32 is threadedly connected to the water box 33.

[0031] Further, the box body 1 and the liquid cooling plate 2 are fixedly connected by fasteners 6, such as a plurality of uniformly distributed fastening bolts.

[0032] Further, a high-voltage plug-in interface 5 is provided on the side wall of the box body 1.

[0033] Further, the material of the liquid cooling plate 2 is an aluminum extrusion profile, and the box body 1 is a sheet metal stamping plate. The combination of these two materials not only saves costs but also ensures the structural stiffness.

[0034] Although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0035] Therefore, the above description is only a preferred embodiment of the present application and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A CTP battery pack box body, characterized in that, It includes an open box body (1), a liquid cooling plate (2) fixedly arranged on the box body (1), and a liquid cooling component (3) arranged on the side of the box body (1); the liquid cooling component (3) includes a liquid cooling pipe (31), a water nozzle (32) connected to the liquid cooling pipe (31), a water box (33) connected to the water nozzle (32), a water inlet pipe (34) and a water outlet pipe (35) connected to the liquid cooling pipe (31); the extending ends of the water inlet pipe (34) and the water outlet pipe (35) are both arranged outside the box body (1).

2. The CTP battery pack housing according to claim 1, wherein, The water nozzle (32) and the water box (33) are symmetrically arranged on both sides of the box body (1), and the liquid cooling pipe (31) includes a main pipeline (311) and an auxiliary pipeline (312) arranged on both sides of the box body (1), wherein the water inlet pipe (34) and the water outlet pipe (35) are both connected to the main pipeline (311).

3. The CTP battery pack housing according to claim 1, wherein It further includes a cross beam (4), the bottom of the cross beam (4) is connected to the box body (1), and both ends of the cross beam (4) are connected to the side wall of the box body (1).

4. The CTP battery pack housing according to claim 1, wherein, A relief groove (12) for accommodating the water box (33) is arranged on the side of the box body (1) where the liquid cooling component (3) is installed.

5. The CTP battery pack box according to claim 2, wherein, The other two sides of the box body (1) have a corrugated structure (13), and the liquid cooling plate (2) has an outer contour matching the corrugated structure (13).

6. The CTP battery pack box according to claim 1, characterized in that, The water nozzle (32) is threadedly connected to the water box (33).

7. The CTP battery pack box according to claim 1, characterized in that, The box body (1) and the liquid cooling plate (2) are fixedly connected by fasteners (6).

8. The CTP battery pack box according to claim 1, wherein A high-voltage plug-in interface (5) is arranged on the side wall of the box body (1).

9. The CTP battery pack box according to claim 1, wherein The material of the liquid cooling plate (2) is aluminum extrusion profile.

10. The CTP battery pack box according to claim 1, characterized in that, The box body (1) is a sheet metal stamping plate.

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