Battery liquid cooling plate structure

Abstract

The utility model provides a battery liquid cooling plate structure which comprises a battery module, the battery module comprises a side plate, a single battery cell is arranged on the inner side of the side plate, the battery liquid cooling plate structure further comprises a first liquid cooling plate, the first liquid cooling plate is arranged at the top end of the single battery cell, the bottom end of the first liquid cooling plate is fixedly connected with a first partition plate, and a second partition plate is arranged at the bottom end of the first liquid cooling plate. The two sides of the first partition plate are provided with at least one single battery cell, the second liquid cooling plate is arranged at the bottom end of the single battery cell, the top end of the second liquid cooling plate is fixedly connected with a second partition plate, and the two sides of the second partition plate are provided with at least one single battery cell; after the battery cells are assembled into a large module, through the limiting of the first liquid cooling plate and the second liquid cooling plate, the phenomenon of superimposed displacement caused by thickness expansion during the circulation of the battery cells is reduced, the deformation and bulging of the top surface of the module are avoided, the pressure on the top of the battery box body is reduced, and the top of the battery box body is not easy to jack open.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically, to a battery liquid cooling plate structure. Background Technology

[0002] In electric vehicles, energy storage systems, and other electronic devices, batteries serve as the core energy storage unit, and their safety and reliability are crucial for the normal operation of the entire system. Battery module assembly technology, as one of the key battery technologies, has received widespread attention and research in recent years. However, despite the existence of various battery assembly technologies, some significant shortcomings and deficiencies still exist.

[0003] The following problems exist in the existing technology:

[0004] After the cells are assembled into a large module, the cell's cycle and thickness expansion will cause displacement, resulting in deformation and bulging of the top surface of the module. This increases the pressure on the top of the battery box, making it easier to push open the top of the battery box.

[0005] Meanwhile, after the battery cells are assembled into large modules, it is necessary to ensure the pre-tightening force of the battery cells at the same time, which is difficult in terms of process. The liquid cooling plates between the battery cells are not sufficiently fixed and constrained, and the battery cells are prone to displacement in the box.

[0006] Therefore, this application provides a battery liquid cooling plate structure to solve the above problems. Utility Model Content

[0007] The purpose and effect of this utility model are achieved by the following specific technical means: a battery liquid cooling plate structure, including a battery module, the battery module including a side plate, a single battery cell being disposed on the inner side of the side plate, and further including:

[0008] The first liquid cooling plate is located at the top of the single cell. The bottom of the first liquid cooling plate is fixedly connected to a first partition plate. At least one single cell is provided on both sides of the first partition plate.

[0009] The second liquid cooling plate is located at the bottom of the individual battery cell. The top of the second liquid cooling plate is fixedly connected to a second partition plate, and at least one individual battery cell is provided on both sides of the second partition plate.

[0010] More preferably, the cross-section of the first liquid cooling plate after being fixed to the first partition plate is T-shaped, and the cross-section of the second liquid cooling plate after being fixed to the second partition plate is T-shaped.

[0011] More preferably, the first liquid cooling plate and the second liquid cooling plate are evenly arranged, and the spacing between the first liquid cooling plate and the second liquid cooling plate is consistent.

[0012] More preferably, the first liquid cooling plate and the second partition plate are bonded together with thermally conductive structural adhesive, the second liquid cooling plate and the first partition plate are bonded together with thermally conductive structural adhesive, and the first partition plate and the second partition plate are bonded and fixed to the individual battery cell with thermally conductive structural adhesive.

[0013] More preferably, the side plate is provided with liquid cooling pipes at both ends, the liquid cooling pipes all penetrate the side plate, and the liquid cooling pipes are fixedly connected to the side plate.

[0014] More preferably, the first liquid cooling plate is provided with a first connecting pipe at both ends, the first connecting pipe passes through the first liquid cooling plate, and the first connecting pipe is fixedly connected to the first liquid cooling plate.

[0015] More preferably, the second liquid cooling plate is provided with second connecting pipes at both ends, the second connecting pipes penetrate the second liquid cooling plate and are fixedly connected to the second liquid cooling plate, and the first connecting pipe and the second connecting pipe are fixedly connected to the outside of the second connecting pipe, the joints limiting the first connecting pipe and the second connecting pipe.

[0016] More preferably, the first connecting pipe and the second connecting pipe are fixedly connected to each other, and the first connecting pipe, the second connecting pipe, and the liquid cooling pipe are fixedly connected.

[0017] More preferably, the individual battery cell has tabs at both ends, and a busbar is provided on one side of the tabs. The tabs and the busbar are connected by laser welding.

[0018] The beneficial effects of this utility model are:

[0019] 1. After the cells are assembled into a large module, the limiting effect of the first and second liquid cooling plates reduces the phenomenon of thickness expansion and displacement during cell cycling, which will not cause deformation and bulging of the top surface of the module, reduce the pressure on the top of the battery box, and make it less likely to push open the top of the battery box.

[0020] 2. At the same time, after the battery cells are assembled into a large module, the first and second partition plates can provide pre-tightening force for the battery cells. The process is simple, the liquid cooling plates between the battery cells have good fixing and constraint performance, and the battery cells are not easy to shift in the box. Attached Figure Description

[0021] Figure 1 A schematic diagram of a battery liquid cooling plate structure provided by this utility model; Figure 2 A schematic diagram of the exploded structure of a battery liquid cooling plate provided by this utility model;

[0022] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle.

[0023] In the diagram: 1. Battery module; 2. Side plate; 3. First liquid cooling plate; 4. Second liquid cooling plate; 5. Single battery cell; 6. Liquid cooling pipe; 7. Connector; 8. First connecting pipe; 9. Second connecting pipe; 10. Second separator plate; 11. First separator plate; 12. Tab; 13. Busbar. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, detailed descriptions of specific embodiments are provided. The following embodiments are merely examples of implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the scope of this utility model are within the patent protection scope of this utility model.

[0025] A battery liquid cooling plate structure includes a battery module 1, which includes a side plate 2. The side plate 2 is fixed to a single battery cell 5 by applying thermally conductive structural adhesive, which can fix and conduct heat. The single battery cell 5 is disposed on the inner side of the side plate 2. The structure also includes:

[0026] The first liquid cooling plate 3 is located at the top of the individual battery cell 5. The first liquid cooling plate 3 completely covers the top of the individual battery cell 5 and limits the individual battery cell 5 at the top. The bottom of the first liquid cooling plate 3 is fixedly connected to the first partition plate 11. At least one individual battery cell 5 is provided on both sides of the first partition plate 11. The interior of the first partition plate 11 is hollow and can be used as a coolant channel for the first liquid cooling plate 3.

[0027] The second liquid cooling plate 4 is located at the bottom of the individual battery cell 5. The first liquid cooling plate 3 completely covers the bottom of the individual battery cell 5 and limits the individual battery cell 5 at the bottom. The top of the second liquid cooling plate 4 is fixedly connected to the second partition plate 10. At least one individual battery cell 5 is provided on both sides of the second partition plate 10. The interior of the second partition plate 10 is hollow and can serve as a coolant channel for the second liquid cooling plate 4.

[0028] After the battery cells are assembled into a large module, the first liquid cooling plate 3 and the second liquid cooling plate 4 limit the phenomenon of thickness expansion and displacement during battery cell cycling, which will not cause deformation and bulging of the top surface of the module, reduce the pressure on the top of the battery box, and make it less likely to push open the top of the battery box.

[0029] Meanwhile, after the battery cells are assembled into a large module, the first partition plate 11 and the second partition plate 10 can provide pre-tightening force for the battery cells. The process is simple, the liquid cooling plates between the battery cells have good fixing and constraint performance, and the battery cells are not easy to shift in the box.

[0030] The cross-section of the first liquid cooling plate 3 after being fixed to the first partition plate 11 is T-shaped, and the cross-section of the second liquid cooling plate 4 after being fixed to the second partition plate 10 is T-shaped, thus being vertical. This can better limit the position of the individual battery cells 5, while reducing the space usage. A single battery pack can hold more individual battery cells 5, thereby effectively improving the energy density.

[0031] The first liquid cooling plate 3 and the second liquid cooling plate 4 are evenly arranged, and the spacing between the first liquid cooling plate 3 and the second liquid cooling plate 4 is consistent, which can improve stability. At the same time, the force on each liquid cooling plate is more even, which can improve the service life of the battery module 1.

[0032] The first liquid cooling plate 3 and the second partition plate 10 are bonded together with thermally conductive structural adhesive. The second liquid cooling plate 4 and the first partition plate 11 are bonded together with thermally conductive structural adhesive. Compared with welding, bonding with thermally conductive structural adhesive can prevent welding from damaging the individual battery cell 5. At the same time, there is no welding slag residue, which can effectively prevent leakage.

[0033] The first partition plate 11 and the second partition plate 10 are bonded and fixed to the single cell 5 by thermally conductive structural adhesive. The thermally conductive structural adhesive shell fills the gap between the first partition plate 11 and the second partition plate 10 and the single cell 5, so that the single cell 5 can be more stably fixed. At the same time, it can conduct heat generated by the single cell 5 for effective heat dissipation.

[0034] The side plate 2 is provided with liquid cooling pipes 6 at both ends. Coolant is introduced through the liquid cooling plate and then introduced into the first connecting pipe 9 and the second connecting pipe 8. The liquid cooling pipes 6 all pass through the side plate 2 and are fixedly connected to the side plate 2. The liquid cooling pipes 6 are fixed by the side plate 2.

[0035] The first liquid cooling plate 3 has a first connecting pipe 9 at both ends. The first connecting pipe 9 passes through the first liquid cooling plate 3 and is fixedly connected to the first liquid cooling plate 3. The first connecting pipe 9 and the second connecting pipe 8 are connected to each other to form a coolant transmission pipeline, which can improve the stability of the first connecting pipe 9 and prevent the first connecting pipe 9 from being broken by water pressure.

[0036] The second liquid cooling plate 4 has second connecting pipes 8 at both ends. The second connecting pipes 8 pass through the second liquid cooling plate 4 and are fixedly connected to the second liquid cooling plate 4. The first connecting pipe 9 and the second connecting pipe 8 are connected to each other to form a coolant transmission pipeline. The first connecting pipe 9 and the second connecting pipe 8 are fixedly connected to the outside of the joint 7. The joint 7 limits the first connecting pipe 9 and the second connecting pipe 8, which can improve the stability of the second connecting pipe 8 and prevent the second connecting pipe 8 from being broken by water pressure.

[0037] The first connecting pipe 9 and the second connecting pipe 8 are fixedly connected to each other. The connection between the first connecting pipe 9 and the second connecting pipe 8 is sealed to prevent coolant leakage and electrical leakage. The first connecting pipe 9, the second connecting pipe 8 and the liquid cooling pipe 6 are fixedly connected. The coolant transported by the liquid cooling pipe 6 is transported through the first connecting pipe 9 and the second connecting pipe 8 to the first partition plate 11 and the second partition plate 10, and finally to the first liquid cooling plate 3 and the second liquid cooling plate 4.

[0038] Each individual cell 5 has tabs 12 at both ends and a busbar 13 on one side of the tabs 12. The tabs 12 and the busbar 13 are connected by laser welding. The connection by laser welding can prevent the tabs 12 from falling off. The top surface of the busbar 13 can be connected to an external acquisition board, thereby enabling the individual cells 5 in the battery module 1 to be connected in series and parallel.

Claims

1. A battery liquid cooling plate structure, comprising a battery module, the battery module including side plates disposed at both ends of the battery module, and a single battery cell disposed on the inner side of the side plate, characterized in that, Also includes: A first liquid cooling plate is disposed at the top of the single cell, and a first partition plate is fixedly connected to the bottom end of the first liquid cooling plate. Single cells are disposed on both sides of the first partition plate. The second liquid cooling plate is disposed at the bottom end of the single cell, and a second partition plate is fixedly connected to the top end of the second liquid cooling plate. Single cells are disposed on both sides of the second partition plate.

2. The battery liquid cooling plate structure according to claim 1, characterized in that: The cross-section of the first liquid cooling plate after it is fixed to the first partition plate is T-shaped, and the cross-section of the second liquid cooling plate after it is fixed to the second partition plate is T-shaped.

3. The battery liquid cooling plate structure according to claim 1, characterized in that: The first liquid cooling plate and the second liquid cooling plate are evenly arranged, and the spacing between the first liquid cooling plate and the second liquid cooling plate is consistent.

4. The battery liquid cooling plate structure according to claim 1, characterized in that: The first liquid cooling plate and the second partition plate are bonded together with thermally conductive structural adhesive, the second liquid cooling plate and the first partition plate are bonded together with thermally conductive structural adhesive, and the first partition plate and the second partition plate are bonded and fixed to the single cell with thermally conductive structural adhesive.

5. The battery liquid cooling plate structure according to claim 1, characterized in that: The side plate is provided with liquid cooling pipes at both ends, and the liquid cooling pipes all penetrate the side plate and are fixedly connected to the side plate.

6. The battery liquid cooling plate structure according to claim 5, characterized in that: The first liquid cooling plate has a first connecting pipe at both ends, the first connecting pipe passes through the first liquid cooling plate, and the first connecting pipe is fixedly connected to the first liquid cooling plate.

7. The battery liquid cooling plate structure according to claim 6, characterized in that: The second liquid cooling plate has a second connecting pipe at both ends, the second connecting pipe passes through the second liquid cooling plate and is fixedly connected to the second liquid cooling plate. The first connecting pipe and the second connecting pipe are fixedly connected to the outside of the joint, and the joint limits the first connecting pipe and the second connecting pipe.

8. The battery liquid cooling plate structure according to claim 7, characterized in that: The first connecting pipe and the second connecting pipe are fixedly connected to each other, and the first connecting pipe, the second connecting pipe, and the liquid cooling pipe are fixedly connected.

9. The battery liquid cooling plate structure according to claim 1, characterized in that: The individual battery cell has tabs at both ends, and a busbar is provided on one side of the tabs. The tabs and the busbar are connected by laser welding.

Images