Double-layer liquid cooling battery cell bracket for battery pack

By using screw connections and liquid cooling plate design for the double-layer liquid-cooled cell bracket, the problems of unstable longitudinal fixation and insufficient heat dissipation of the battery module are solved, achieving stable fixation and efficient heat dissipation, and reducing safety hazards.

CN223501980UActive Publication Date: 2025-10-31WUXI MINGHENG HYBRID TECH CO LTD
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Patent Information

Application Number
CN202422891399.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2025-10-31
Estimated Expiration
2034-11-26

AI Technical Summary

Technical Problem

In traditional technology, battery modules are stacked vertically and are unstable, and cannot effectively dissipate heat, leading to safety hazards, especially in high-temperature environments where they may explode.

Method used

A double-layer liquid-cooled cell bracket is adopted, with the upper and lower liquid-cooled bracket modules connected by screws and cooled by liquid cooling plates. Combined with the cell frame limiting and fixing and the bottom ventilation groove, heat dissipation is promoted.

Benefits of technology

It achieves stable vertical fixation of the battery module and efficient heat dissipation, reducing safety risks caused by heat accumulation. The structure is simple and easy to assemble and disassemble.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of battery packs, in particular to a double-layer liquid-cooled battery cell support for a battery pack, which comprises an upper-layer liquid-cooled support module and a lower-layer liquid-cooled support module which are longitudinally arranged, the upper-layer liquid-cooled support module comprises an upper-layer liquid-cooled plate and an upper-layer battery cell frame which are connected with each other, and the lower-layer liquid-cooled support module comprises a lower-layer liquid-cooled plate. The lower-layer liquid cooling bracket module comprises a lower-layer liquid cooling plate and a lower-layer battery cell frame which are connected with each other; screw rod through holes are formed in the upper-layer battery cell frame, the upper-layer liquid cooling plate, the lower-layer battery cell frame and the lower-layer liquid cooling plate, and screw rods with screw caps can penetrate through the screw rod through holes to realize serial connection; the same side of the upper-layer liquid cooling plate and the lower-layer liquid cooling plate is connected with a liquid inlet and outlet assembly which is used for simultaneously and circularly providing cooling liquid for the upper-layer liquid cooling plate and the lower-layer liquid cooling plate. According to the device, the double-layer battery cell modules which are longitudinally stacked can be quickly connected, and the battery cell modules can be stably fixed and subjected to heat dissipation and cooling.
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Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a double-layer liquid-cooled cell support for battery packs. Background Technology

[0002] Currently, new energy vehicles have received widespread attention from all sectors of society due to their excellent environmental performance, and the requirements for them are constantly increasing. As a type of new energy vehicle, electric vehicles are also developing towards higher safety, higher energy density, and lighter weight. The main factor determining the driving range of an electric vehicle is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet driving requirements.

[0003] Battery packs for electric vehicles typically consist of multiple cell modules. These modules are stacked within the same housing and then connected to each other. The core cell module is configured with a specific number of cells to meet the required output voltage, and all cells are then connected to output the voltage. To meet the battery's power requirements, cell modules are usually arranged as modules, with at least two modules stacked and electrically connected to each other. Stacking methods include horizontal or vertical stacking.

[0004] Traditional techniques for vertically stacking double-layer battery modules typically involve directly stacking them and then bonding or securing them with double-sided tape or steel straps, or encapsulating them in a custom-made box. The double-sided tape and steel strap method is not only cumbersome and provides poor fixation, but it is also highly susceptible to loosening due to external vibrations. While box encapsulation can wrap two battery modules into a single unit, it requires a custom-made box, resulting in high costs and difficulties in future maintenance. Furthermore, vertically stacked battery modules generate significant heat during operation. Without effective heat dissipation, excessively high temperatures within the battery pack can lead to the battery modules burning out or even exploding, causing safety hazards.

[0005] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to overcome the problems of the prior art and provide a double-layer liquid-cooled cell support for battery packs. This solves the technical problems of traditional technology, which cannot stably fix and stack battery modules in the longitudinal direction, and cannot cool and dissipate heat from each layer of battery modules in the longitudinal direction.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A double-layer liquid-cooled cell support for a battery pack includes an upper liquid-cooled support module and a lower liquid-cooled support module arranged longitudinally. The upper liquid-cooled support module includes an upper liquid-cooled plate and an upper cell frame connected to each other, and the lower liquid-cooled support module includes a lower liquid-cooled plate and a lower cell frame connected to each other. Each of the upper cell frame, the upper liquid-cooled plate, the lower cell frame, and the lower liquid-cooled plate has a screw through hole, through which a screw with a nut can pass to achieve series connection. The upper liquid-cooled plate and the lower liquid-cooled plate are connected to a liquid inlet / outlet assembly on the same side for simultaneously circulating coolant to the upper liquid-cooled plate and the lower liquid-cooled plate.

[0009] Furthermore, the upper liquid cooling plate is provided with an upper liquid cooling inlet port and an upper liquid cooling outlet port on the same side, and the lower liquid cooling plate is provided with a lower liquid cooling inlet port and a lower liquid cooling outlet port on the same side; the inlet / outlet assembly includes an upper liquid inlet pipe provided on the upper liquid cooling inlet port, a lower liquid inlet pipe provided on the lower liquid cooling inlet port, an upper liquid outlet pipe provided on the upper liquid cooling outlet port, and a lower liquid outlet pipe provided on the lower liquid cooling outlet port; the upper liquid inlet pipe and the lower liquid inlet pipe are connected to the main liquid inlet pipe through a three-way liquid inlet connector, and the upper liquid outlet pipe and the lower liquid outlet pipe are connected to the main liquid outlet pipe through a three-way liquid outlet connector.

[0010] Furthermore, the upper cell frame and the lower cell frame have the same specifications, both including a left end plate and a right end plate symmetrically arranged on the left and right sides, and a side beam plate symmetrically arranged between the left end plate and the right end plate. The side beam plate forms a bottom ventilation groove for the cell module between the upper liquid cooling plate and the lower liquid cooling plate.

[0011] Furthermore, the screw through hole includes an end plate screw through hole longitudinally disposed on the left end plate and the right end plate, and a screw connection hole corresponding to the end plate screw through hole is provided on the upper liquid cooling plate and the lower liquid cooling plate. The screw passes through the end plate screw through hole and the screw connection hole of the upper liquid cooling bracket module and the end plate screw through hole and the screw connection hole of the lower liquid cooling bracket module in sequence, and is screwed to the bottom plate of the box on the bottom side.

[0012] Furthermore, the end plate screw through hole includes lateral screw through holes symmetrically arranged at both ends of the left end plate and the right end plate, and a central screw through hole arranged in the middle section of the left end plate and the right end plate; the screw connection hole includes a lateral screw connection hole corresponding to the lateral screw through hole, and a central screw connection hole corresponding to the central screw through hole.

[0013] Furthermore, a mounting cavity partition is provided between the left end plate and the right end plate, the mounting cavity partition dividing the upper cell frame and / or the lower cell frame into a first cell module mounting cavity and a second cell module mounting cavity that are independent of each other.

[0014] Furthermore, the bottom of the mounting cavity partition is in contact with the upper liquid cooling plate or the lower liquid cooling plate.

[0015] Furthermore, the upper liquid cooling plate, the upper cell frame, the lower liquid cooling plate, and the lower cell frame are all made of aluminum alloy.

[0016] Beneficial effects

[0017] This invention provides a double-layer liquid-cooled cell support for battery packs. The upper and lower liquid-cooled support modules are connected in series via screws. A liquid-cooling plate absorbs and dissipates heat from the bottom of the cell module. A cell frame provides positioning and fixation for the cell module. A ventilation groove at the bottom of the cell module between the cell module and the liquid-cooling plate facilitates bottom heat dissipation. This device has a simple structure and enables quick connection of vertically stacked double-layer cell modules. It is easy to assemble and disassemble, and provides stable fixation and cooling for the cell modules. Attached Figure Description

[0018] Figure 1 This is a first-view structural schematic diagram of a double-layer liquid-cooled cell support for a battery pack according to the present invention;

[0019] Figure 2 This is a second-view structural schematic diagram of a double-layer liquid-cooled cell support for a battery pack according to the present invention;

[0020] Figure 3 This is an exploded view of a double-layer liquid-cooled cell support for a battery pack according to the present invention.

[0021] Figure 4 This is a schematic diagram of the single-layer support module structure in the double-layer liquid-cooled cell support for battery packs described in this utility model.

[0022] Illustration markings:

[0023] 1-Upper liquid cooling bracket module, 101-Upper liquid cooling plate, 102-Upper cell frame, 103-Upper cell module mounting cavity, 104-Upper liquid cooling inlet interface, 105-Upper liquid cooling outlet interface;

[0024] 2-Lower layer liquid cooling bracket module, 201-Lower layer liquid cooling plate, 202-Lower layer cell frame, 203-Lower layer cell module mounting cavity, 204-Lower layer liquid cooling inlet interface, 205-Lower layer liquid cooling outlet interface;

[0025] 3-Screw through hole, 301-End plate screw through hole, 302-Screw connection hole, 303-Side screw through hole, 304-Center screw through hole, 305-Side screw connection hole, 306-Center screw connection hole;

[0026] 4-Inlet / outlet assembly, 401-Upper inlet pipe, 402-Lower inlet pipe, 403-Upper outlet pipe, 404-Lower outlet pipe, 405-T-connector for inlet, 406-T-connector for outlet, 407-Main inlet pipe, 408-Main outlet pipe;

[0027] 5-Screw;

[0028] 6-Left end plate;

[0029] 7-Right end plate;

[0030] 8-Side beams;

[0031] 9-Ventilation slot at the bottom of the battery cell module;

[0032] 10-Install the cavity partition;

[0033] 11-First cell module mounting cavity;

[0034] 12 - Second cell module mounting cavity. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] like Figure 1 and Figure 2 As shown, this solution provides a double-layer liquid-cooled cell support for a battery pack, including an upper liquid-cooled support module 1 and a lower liquid-cooled support module 2 arranged longitudinally. The upper liquid-cooled support module 1 includes an upper liquid-cooled plate 101 and an upper cell frame 102 connected to each other, and the lower liquid-cooled support module 2 includes a lower liquid-cooled plate 201 and a lower cell frame 202 connected to each other.

[0037] The upper cell frame 102, the upper liquid cooling plate 101, the lower cell frame 202 and the lower liquid cooling plate 201 are all provided with screw through holes 3, and the screws 5 with nuts can pass through the screw through holes 3 to achieve series connection.

[0038] The upper liquid cooling plate 101 and the lower liquid cooling plate 201 are connected to the same side of the liquid inlet and outlet assembly 4, which is used to simultaneously circulate coolant to the upper liquid cooling plate 101 and the lower liquid cooling plate 201 to achieve liquid cooling.

[0039] In this embodiment, the upper cell frame 102 and the upper liquid cooling plate 101 form an upper cell module mounting cavity 103 for mounting the upper cell module; the lower cell frame 202 and the lower liquid cooling plate 201 form a lower cell module mounting cavity 203 for mounting the lower cell module.

[0040] like Figure 1 As shown, the optimization of the inlet / outlet liquid assembly 4 in this embodiment specifically includes:

[0041] The upper liquid cooling plate 101 is provided with an upper liquid cooling inlet 104 and an upper liquid cooling outlet 105 on the same side, and the lower liquid cooling plate 201 is provided with a lower liquid cooling inlet 204 and a lower liquid cooling outlet 205 on the same side.

[0042] The liquid inlet / outlet assembly 4 includes an upper liquid inlet pipe 401 disposed on the upper liquid cooling inlet port 104, a lower liquid inlet pipe 402 disposed on the lower liquid cooling inlet port 204, an upper liquid outlet pipe 403 disposed on the upper liquid cooling outlet port 105, and a lower liquid outlet pipe 404 disposed on the lower liquid cooling outlet port 205; the upper liquid inlet pipe 401 and the lower liquid inlet pipe 402 are connected to the main liquid inlet pipe 407 through a three-way liquid inlet connector 405, and the upper liquid outlet pipe 403 and the lower liquid outlet pipe 404 are connected to the main liquid outlet pipe 408 through a three-way liquid outlet connector 406.

[0043] By connecting the external coolant circulation device to the inlet pipe 407 and the outlet pipe 408 respectively, the purpose of simultaneously supplying coolant to the upper liquid cooling plate 101 and the lower liquid cooling plate 201 can be achieved.

[0044] In this embodiment, both the upper liquid cooling plate 101 and the lower liquid cooling plate 201 are provided with liquid cooling channels for coolant flow. Each liquid cooling channel has two connection ports, which are respectively connected to their respective liquid inlet and liquid outlet ports. Under the action of the external coolant circulation device, a liquid cooling circulation is formed inside the liquid cooling plate, thereby dissipating heat for the battery cell module placed on its surface.

[0045] The upper liquid cooling plate 101, the upper battery cell frame 102, the lower liquid cooling plate 201, and the lower battery cell frame 202 are all made of aluminum alloy, which not only has the advantages of light weight, high hardness, and corrosion resistance, but also facilitates heat conduction and ultimately dissipates heat and cools down through the liquid cooling base plate.

[0046] like Figure 3 and Figure 4 As shown, in this embodiment, the upper cell frame 102 and the lower cell frame 202 have the same specifications, both including a left end plate 6 and a right end plate 7 symmetrically arranged on the left and right sides, and a side beam plate 8 symmetrically arranged between the left end plate 6 and the right end plate 7. The side beam plate 8 forms a bottom ventilation groove 9 for the cell module between the upper liquid cooling plate 101 and the lower liquid cooling plate 201. Here, the side beam plate 8 is configured not to contact the upper liquid cooling plate 101 and the lower liquid cooling plate 201, and forms a bottom ventilation groove 9 for the cell module. This structure can better facilitate the air circulation at the bottom of the cell module and further promote heat dissipation.

[0047] Specifically, the screw through hole 3 includes an end plate screw through hole 301 longitudinally disposed on the left end plate 6 and the right end plate 7, and a screw connection hole 302 corresponding to the end plate screw through hole 301 is disposed on the upper liquid cooling plate 101 and the lower liquid cooling plate 201. The screw 5 passes through the end plate screw through hole 301 and the screw connection hole 302 of the upper liquid cooling bracket module 1 and the end plate screw through hole 301 and the screw connection hole 302 of the lower liquid cooling bracket module 2 in sequence and is screwed to the bottom plate of the box on the bottom side, so as to realize the simultaneous connection of the upper cell frame 102, the upper liquid cooling plate 101, the lower cell frame 202 and the lower liquid cooling plate 201, and fix them together on the bottom plate of the battery pack box.

[0048] In this embodiment, the end plate screw through hole 301 includes side screw through holes 303 symmetrically arranged at both ends of the left end plate 6 and the right end plate 7, and a center screw through hole 304 arranged in the middle section of the left end plate 6 and the right end plate 7; the screw connecting hole 302 includes a side screw connecting hole 305 corresponding to the side screw through hole 303, and a center screw connecting hole 306 corresponding to the center screw through hole 304.

[0049] By using the above-mentioned holes, the left end plate 6 and the right end plate 7 located on the upper cell frame 102 can be firmly connected to the upper liquid cooling plate 101, and the left end plate 6 and the right end plate 7 located on the lower cell frame 202 can be firmly connected to the lower liquid cooling plate 201. This can avoid the problem of end plate loosening during long-term use and ensure the stable operation of the subsequent cell module.

[0050] like Figure 3 and Figure 4 As shown, as an optimization of this solution, a mounting cavity partition 10 is further provided between the left end plate 6 and the right end plate 7. The mounting cavity partition 10 divides the upper cell frame 102 and / or the lower cell frame 202 into two independent cell module mounting cavities 11 and 12. Two cell modules can be installed in the first cell module mounting cavity 11 and the second cell module mounting cavity 12 respectively, thereby enabling the horizontal stacking of two cell modules on the same layer.

[0051] It should be noted that, in this embodiment, the bottom of the mounting cavity partition 10 is in contact with the upper liquid cooling plate 101 or the lower liquid cooling plate 201, thereby achieving complete separation of the two battery cell modules installed horizontally, ensuring that the battery cell modules located in the first battery cell module mounting cavity 11 and the second battery cell module mounting cavity 12 can work without interference.

[0052] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-layer liquid-cooled cell support for a battery pack, characterized in that, It includes an upper liquid cooling support module (1) and a lower liquid cooling support module (2) arranged vertically. The upper liquid cooling support module (1) includes an upper liquid cooling plate (101) and an upper battery cell frame (102) connected to each other. The lower liquid cooling support module (2) includes a lower liquid cooling plate (201) and a lower battery cell frame (202) connected to each other. The upper battery cell frame (102), the upper liquid cooling plate (101), the lower battery cell frame (202) and the lower liquid cooling plate (201) are all provided with screw through holes (3), and the screw (5) with a nut can pass through the screw through hole (3) to achieve series connection; The upper liquid cooling plate (101) and the lower liquid cooling plate (201) are connected to a liquid inlet / outlet assembly (4) on the same side, which is used to simultaneously circulate coolant to the upper liquid cooling plate (101) and the lower liquid cooling plate (201).

2. A double-layer liquid-cooled cell support for a battery pack according to claim 1, characterized in that, The upper liquid cooling plate (101) is provided with an upper liquid cooling inlet port (104) and an upper liquid cooling outlet port (105) on the same side, and the lower liquid cooling plate (201) is provided with a lower liquid cooling inlet port (204) and a lower liquid cooling outlet port (205) on the same side. The liquid inlet / outlet assembly (4) includes an upper liquid inlet pipe (401) disposed on the upper liquid cooling inlet port (104), a lower liquid inlet pipe (402) disposed on the lower liquid cooling inlet port (204), an upper liquid outlet pipe (403) disposed on the upper liquid cooling outlet port (105), and a lower liquid outlet pipe (404) disposed on the lower liquid cooling outlet port (205); the upper liquid inlet pipe (401) and the lower liquid inlet pipe (402) are connected to the main liquid inlet pipe (407) through a three-way liquid inlet connector (405), and the upper liquid outlet pipe (403) and the lower liquid outlet pipe (404) are connected to the main liquid outlet pipe (408) through a three-way liquid outlet connector (406).

3. A double-layer liquid-cooled cell support for a battery pack according to claim 1, characterized in that, The upper cell frame (102) and the lower cell frame (202) have the same specifications. Both include a left end plate (6) and a right end plate (7) symmetrically arranged on the left and right sides, and a side beam plate (8) symmetrically arranged between the left end plate (6) and the right end plate (7). The side beam plate (8) forms a bottom ventilation groove (9) for the cell module between the upper liquid cooling plate (101) and the lower liquid cooling plate (201).

4. A double-layer liquid-cooled cell support for a battery pack according to claim 3, characterized in that, The screw through hole (3) includes an end plate screw through hole (301) longitudinally arranged on the left end plate (6) and the right end plate (7), and screw connection holes (302) corresponding to the end plate screw through hole (301) are provided on the upper liquid cooling plate (101) and the lower liquid cooling plate (201). The screw (5) passes through the end plate screw through hole (301) and the screw connection hole (302) of the upper liquid cooling bracket module (1) and the end plate screw through hole (301) and the screw connection hole (302) of the lower liquid cooling bracket module (2) in sequence and is screwed to the bottom plate of the box on the bottom side.

5. A double-layer liquid-cooled cell support for a battery pack according to claim 4, characterized in that, The end plate screw through hole (301) includes side screw through holes (303) symmetrically arranged at both ends of the left end plate (6) and the right end plate (7), and a center screw through hole (304) arranged in the middle section of the left end plate (6) and the right end plate (7); the screw connection hole (302) includes a side screw connection hole (305) corresponding to the side screw through hole (303), and a center screw connection hole (306) corresponding to the center screw through hole (304).

6. A double-layer liquid-cooled cell support for a battery pack according to claim 3, characterized in that, A mounting cavity partition (10) is also provided between the left end plate (6) and the right end plate (7). The mounting cavity partition (10) divides the upper cell frame (102) and / or the lower cell frame (202) into a first cell module mounting cavity (11) and a second cell module mounting cavity (12) that are independent of each other.

7. A double-layer liquid-cooled cell support for a battery pack according to claim 6, characterized in that, The bottom of the mounting cavity partition (10) is in contact with the upper liquid cooling plate (101) or the lower liquid cooling plate (201).

8. A double-layer liquid-cooled cell support for a battery pack according to claim 1, characterized in that, The upper liquid cooling plate (101), the upper cell frame (102), the lower liquid cooling plate (201), and the lower cell frame (202) are all made of aluminum alloy.