Battery pack liquid cooling device for battery module

Abstract

The utility model discloses a battery pack liquid cooling device for a battery module. The battery pack liquid cooling device comprises the battery module, the bottom layer liquid cooling assembly is arranged at the bottom end of the battery module, and the middle layer liquid cooling plate is arranged between the battery modules; and the liquid cooling pipeline assembly is connected to the end parts of the bottom-layer liquid cooling assembly and the middle-layer liquid cooling plate, and the bottom-layer liquid cooling assembly and the middle-layer liquid cooling plate are matched with the liquid cooling pipeline assembly to carry out heat conduction and heat exchange on the battery module so as to ensure that the temperature of the battery cell is uniform. According to the utility model, the plurality of partitioned liquid cooling plates are designed and adopted, so that the phenomenon of uneven temperature of the whole package caused by inconsistent flow resistance is avoided; and meanwhile, the manufacturing cost caused by design redundancy and the weight of the whole pack are reduced by canceling the arrangement of the liquid cooling plate in the middle sunken area of the battery envelope.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack liquid cooling devices, and in particular to a battery pack liquid cooling device for a battery module. Background Art

[0002] To ensure stable battery operation, the battery pack is usually designed to place the battery module on the bottom plate of the box, fix the module on the reinforced longitudinal beam structure, and use a whole liquid cooling plate on the bottom layer to dissipate heat from the battery module cells. However, due to the limitations of traditional battery pack structural design and module structural defects, while meeting the requirements of heat dissipation and structural strength, the overall space utilization of the battery pack box is too low, reducing the battery energy density and seriously affecting the performance of the battery and battery pack. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art. To achieve the above purpose, a battery pack liquid cooling device for a battery module is used to solve the problems raised in the above background technology.

[0004] A battery pack liquid cooling device for a battery module, comprising:

[0005] Battery module;

[0006] A bottom liquid cooling assembly disposed at the bottom of the battery module, and a middle liquid cooling plate disposed between the battery modules;

[0007] The bottom liquid cooling assembly and the middle liquid cooling plate are connected to the liquid cooling pipe assembly, and the bottom liquid cooling assembly and the middle liquid cooling plate cooperate with the liquid cooling pipe assembly to conduct heat and exchange heat on the battery module to ensure uniform temperature of the battery core.

[0008] As a further solution of the utility model: the battery module includes an upper battery module, a lower battery module arranged at the lower end of the upper battery module, and a module lower box.

[0009] As a further solution of the utility model: the bottom liquid cooling assembly includes a first bottom liquid cooling plate, a second bottom liquid cooling plate, a third bottom liquid cooling plate, and a fourth bottom liquid cooling plate arranged between the lower battery module and the lower box of the module.

[0010] As a further solution of the utility model: the bottom liquid cooling components are all provided with positioning holes, and the module lower box is provided with positioning pins.

[0011] As a further solution of the utility model: the lower battery module is fixed to the lower module box by means of a module fixing strip and long bolts.

[0012] As a further solution of the utility model: the upper battery module is fixed to the mounting hole of the middle liquid cooling plate by long bolts.

[0013] As a further solution of the present invention: the liquid cooling pipeline assembly includes a water inlet liquid cooling pipeline and a water outlet liquid cooling pipeline.

[0014] As a further solution of the utility model: the water inlet liquid cooling pipeline and the water outlet liquid cooling pipeline adopt a parallel structure.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] By adopting the above-mentioned technical scheme, the bottom liquid cooling component is divided into 4 pieces which are in contact with the bottom surface of the lower module battery respectively. The liquid cooling pipe component adopts a parallel scheme to effectively solve the water resistance, and can realize efficient heat conduction and heat exchange, ensuring the consistency of the flow of the front and rear liquid cooling plates, and realizing uniform temperature of the battery cells of the front and rear modules; the middle liquid cooling plate is installed in the middle of the upper and lower battery modules at the rear end of the battery pack, realizing the upper support and fixing function while having the heat transfer function for heat exchange with the upper layer, rationally utilizing the limited space of the rear end battery pack, improving the overall space utilization of the battery pack box, and improving the energy density of the battery pack; the bottom liquid cooling component does not need to be bolted to the box body first, but is positioned by the bottom plate locating pins of the lower box body of the module, and the battery module is installed on the lower liquid cooling plate of the lower box body of the module, and fixed to the lower box body by long bolts, reducing production processes and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a schematic structural diagram of a battery pack liquid cooling device according to an embodiment disclosed in the present application;

[0019] Figure 2 This is a schematic diagram of the structure of the liquid cooling assembly and the lower box of the module of the embodiment disclosed in this application;

[0020] Figure 3 This is a schematic structural diagram of a liquid cooling plate and a liquid cooling pipeline assembly according to an embodiment disclosed in the present application;

[0021] Figure 4 This is a schematic structural diagram of the bottom liquid cooling plate of the embodiment disclosed in this application;

[0022] Figure 5 It is a schematic structural diagram of the lower box of the module according to the embodiment disclosed in the present application.

[0023] In the figure: 1. battery module; 10. module lower box; 11. upper battery module; 12. lower battery module; 13. positioning pin; 14. module fixing strip; 15. long bolt; 2. bottom liquid cooling assembly; 21. first bottom liquid cooling plate; 22. second bottom liquid cooling plate; 23. third bottom liquid cooling plate; 24. fourth bottom liquid cooling plate; 25. positioning hole; 3. middle liquid cooling plate; 31. mounting hole; 4. liquid cooling pipeline assembly; 41. water inlet liquid cooling pipeline; 42. water outlet liquid cooling pipeline. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Please refer to Figure 1 In an embodiment of the utility model, a battery pack liquid cooling device for a battery module includes:

[0026] Battery module 1;

[0027] A bottom liquid cooling assembly 2 disposed at the bottom of the battery module 1, and a middle liquid cooling plate 3 disposed between the battery modules 1;

[0028] The liquid cooling pipe assembly 4 is connected to the ends of the bottom liquid cooling assembly 2 and the middle liquid cooling plate 3. The bottom liquid cooling assembly 2 and the middle liquid cooling plate 3 cooperate with the liquid cooling pipe assembly 4 to conduct heat and exchange heat on the battery module 1 to ensure uniform temperature of the battery cells.

[0029] In this embodiment, Figure 2 As shown, the figure is a structural schematic diagram of the liquid cooling assembly and the module lower box 10; the battery module 1 includes an upper battery module 11, a lower battery module 12 arranged at the lower end of the upper battery module 11, and a module lower box 10.

[0030] In this embodiment, Figure 3 As shown, the figure is a structural schematic diagram of the liquid cooling plate and the liquid cooling pipeline assembly 4; the bottom liquid cooling assembly 2 includes a first bottom liquid cooling plate 21, a second bottom liquid cooling plate 22, a third bottom liquid cooling plate 23, and a fourth bottom liquid cooling plate 24 arranged between the lower battery module 12 and the lower box body 10 of the module.

[0031] In this embodiment, Figure 4 As shown, the figure is a schematic diagram of the structure of the bottom liquid cooling plate; the bottom liquid cooling components 2 are all provided with positioning holes 25, and the module lower box 10 is provided with positioning pins 13.

[0032] In a specific implementation manner, Figure 5 As shown, the figure is a schematic diagram of the structure of the lower box body 10 of the module; the structure of the positioning hole 25 of the bottom liquid cooling component 2 and the structure of the positioning pin 13 on the lower box body 10 of the module cooperate with each other to achieve positioning and fixation, thereby preventing the bottom liquid cooling plate from having poor contact with the bottom of the battery module 1, i.e., misalignment, causing heat conduction differences and resulting in uneven temperature.

[0033] In this embodiment, the lower battery module 12 is fixed to the lower module box 10 by means of a module fixing strip 14 and long bolts 15 .

[0034] In this embodiment, the upper battery module 11 is fixed to the mounting hole 31 of the middle liquid cooling plate 3 by means of long bolts 15 .

[0035] The middle liquid cooling plate 3 is installed between the upper battery module 11 and the lower battery module 12 at the rear end of the battery pack, so as to realize the supporting and fixing function of the upper layer and at the same time have the heat transfer function of heat exchange for the upper layer, rationally utilize the limited space of the rear end battery pack, improve the overall space utilization rate of the battery pack box, and improve the energy density of the battery pack; the bottom liquid cooling plate does not need to be bolted to the box first, but is positioned by the bottom plate locating pins 13 of the lower box 10 of the module. The battery module 1 is installed on the liquid cooling plate of the lower box 10 of the module and fixed to the lower box 10 of the module by long bolts 15, thereby reducing the production process and cost.

[0036] In this embodiment, the liquid cooling pipeline assembly 4 includes a water inlet liquid cooling pipeline 41 and a water outlet liquid cooling pipeline 42, and the water inlet liquid cooling pipeline 41 and the water outlet liquid cooling pipeline 42 adopt a parallel structure;

[0037] In a specific embodiment, the bottom liquid cooling assembly 2 is divided into four pieces, which are in contact with the bottom surface of the lower battery module 12 respectively. The liquid cooling pipe assembly 4 adopts a parallel solution to effectively solve the water resistance, and can realize efficient heat conduction and heat exchange, ensure the consistency of the flow of the front and rear liquid cooling plates, and realize the uniform temperature of the battery cells of the front and rear modules. The positioning hole 25 structure of the bottom liquid cooling plate and the positioning pin 13 structure on the lower box body 10 of the module cooperate with each other to achieve positioning and fixation, so as to prevent the poor contact between the liquid cooling plate and the bottom of the battery module 1 and cause uneven temperature.

[0038] In a specific implementation manner, the positioning holes 25 on the bottom liquid cooling assembly 2 are placed on the bottom plate of the battery lower box body and positioned by the positioning pins 13. The lower battery module 12 is placed on the shell of the module lower box body 10, and passes through the support block of the middle liquid cooling plate 3. Eight long bolts 15 are used to fasten the lower battery module 12 to the module lower box body 10. The upper battery module 11 is placed on the middle liquid cooling plate 3. Eight long bolts 15 are passed through the mounting holes 31 of the middle liquid cooling plate 3 to fasten the upper battery module 11 to the middle liquid cooling plate 3, thereby fixing the upper battery module 11. Since the middle liquid cooling plate 3 is fixed to the lower battery module 12 and the module lower box body 10, the upper battery module 11 is indirectly fixed to the module lower box body 10.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described in terms of implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A battery pack liquid cooling device for a battery module, characterized in that: include: Battery module (1); A bottom layer liquid cooling assembly (2) arranged at the bottom end of the battery module, and a middle layer liquid cooling plate (3) arranged between the battery modules; A liquid cooling pipeline assembly (4) is connected to the ends of the bottom liquid cooling assembly and the middle liquid cooling plate. The bottom liquid cooling assembly and the middle liquid cooling plate cooperate with the liquid cooling pipeline assembly to conduct heat conduction and heat exchange on the battery module, thereby ensuring uniform temperature of the battery core.

2. A battery pack liquid cooling device for a battery module according to claim 1, characterized in that: The battery module comprises an upper battery module (11), a lower battery module (12) arranged at the lower end of the upper battery module, and a module lower box (10).

3. A battery pack liquid cooling device for a battery module according to claim 2, characterized in that: The bottom layer liquid cooling assembly comprises a first bottom layer liquid cooling plate (21), a second bottom layer liquid cooling plate (22), a third bottom layer liquid cooling plate (23), and a fourth bottom layer liquid cooling plate (24) which are arranged between the lower layer battery module and the lower box of the module.

4. A battery pack liquid cooling device for a battery module according to claim 3, characterized in that: The bottom layer liquid cooling assembly is provided with a positioning hole (25), the middle layer liquid cooling plates are all provided with positioning holes, and the module lower box is provided with a positioning pin (13).

5. A battery pack liquid cooling device for a battery module according to claim 4, characterized in that: The lower battery module is fixed to the lower module box body by means of a module fixing strip (14) and long bolts (15).

6. A battery pack liquid cooling device for a battery module according to claim 4, characterized in that: The upper battery module is fixed to the mounting hole (31) of the middle liquid cooling plate by means of long bolts.

7. A battery pack liquid cooling device for a battery module according to claim 1, characterized in that: The liquid cooling pipeline assembly comprises a water inlet liquid cooling pipeline (41) and a water outlet liquid cooling pipeline (42).

8. A battery pack liquid cooling device for a battery module according to claim 7, characterized in that: The water inlet liquid cooling pipeline and the water outlet liquid cooling pipeline adopt a parallel structure.

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