Combinable 18650 cylindrical automobile battery module

Abstract

The invention discloses a combinable 18650 cylindrical automobile battery module, and relates to the technical field of automobile batteries, the combinable 18650 cylindrical automobile battery module comprises a plurality of cylindrical battery cells, combined end blocks sleeved with the positive and negative electrodes of the cylindrical battery cells, nickel sheets arranged on the other sides of the combined end blocks, copper bars arranged on the other sides of the nickel sheets, and partition plates arranged on one sides of the copper bars; side metal plates are arranged on the two sides of the battery module, end covers are arranged at the two ends of the battery module, a plurality of electrode connecting plates are arranged at the top of the battery module, sampling lines are arranged at the tops of the electrode connecting plates, and protective covers are arranged at the tops of the sampling lines and the tops of the electrode connecting plates. The LED lamp is reasonable in structure, reliable in electrical connection, good in heat dissipation and stable in structure.

Description

A combinable 18650 cylindrical automotive battery module Technical Field

[0001] This invention relates to the technical field of automotive batteries, specifically to a combinable 18650 cylindrical automotive battery module. Background Technology

[0002] With the rapid development of electric and hybrid vehicles, the performance requirements for automotive energy storage devices are increasing. 18650 cylindrical batteries, due to their advantages such as high energy density, long cycle life, and relatively low cost, have been widely used in the automotive battery field. However, in practical applications, multiple 18650 cylindrical batteries need to be combined into battery modules to meet the voltage and capacity requirements of automobiles.

[0003] Existing 18650 cylindrical automotive battery modules have some shortcomings in terms of assembly methods, electrical connections, heat dissipation, and structural stability. For example, the assembly structure of some battery modules is complex and difficult, resulting in low production efficiency; the contact resistance of the electrical connections is relatively high, generating more heat during high-current charging and discharging, affecting battery performance and safety; the heat dissipation design is not reasonable enough, making it difficult to effectively dissipate the heat generated by the battery, which can easily lead to battery thermal runaway; the overall structural strength of the module is insufficient, and the battery is easily damaged by vibration and impact during vehicle operation, affecting its service life.

[0004] Therefore, developing a combinable 18650 cylindrical automotive battery module with a reasonable structure, reliable electrical connection, good heat dissipation, and stable structure is of great practical significance. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a combinable 18650 cylindrical automotive battery module to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a combinable 18650 cylindrical automotive battery module, comprising multiple cylindrical cells, with the positive and negative ends of each cylindrical cell fitted onto a combined end block, a nickel sheet on one side of the combined end block, a copper busbar on the other side of the nickel sheet, and a separator on one side of the copper busbar; side sheet metal on both sides of the battery module, end caps at both ends of the battery module, multiple electrode connection plates on the top of the battery module, sampling lines on the top of the electrode connection plates, and a protective cover on the top of the sampling lines and the top of the electrode connection plates.

[0007] Preferably, the multiple cylindrical cells are arranged in a 4-cell, 32-cell configuration to form the battery module, which is connected in series with multiple energy storage devices for electric vehicles or hybrid vehicles.

[0008] Preferably, the combined end block is in the form of a rectangular structure, with symmetrical protrusions on the top and one side, and symmetrical grooves on the bottom and the other side; the symmetrical protrusions and symmetrical grooves of two adjacent combined end blocks can be fitted and assembled.

[0009] Preferably, the top of the copper busbar is provided with a perforated bend for connection and fixing, which is used to fix it to the top of the electrode connection plate by fastening screws and sheet copper sheets.

[0010] Preferably, the partition is located between two adjacent copper busbars.

[0011] Preferably, an outer frame is provided between the side sheet metal and the outer wall of the battery module.

[0012] Preferably, the side sheet metal sidewall has multiple linear heat dissipation holes distributed through it, and the two end sidewalls of the side sheet metal are connected to the end cap sidewall by multiple longitudinally distributed screws.

[0013] Preferably, the top two ends of the end cap are connected to the top two ends of the side sheet metal by long screws.

[0014] Preferably, one of the end cap sidewalls is provided with a positive copper sheet, and the other end cap sidewall is provided with a negative copper sheet, and both the positive and negative copper sheets are provided with a cover on the other side.

[0015] Preferably, the top of the electrode connecting plate and the bottom of the protective cover are connected by a snap-fit ​​mechanism.

[0016] In summary, the present invention has the following advantages: The present invention adopts a symmetrical protrusion and symmetrical groove interlocking assembly connection method of combined end blocks, which has a simple structure, is easy to assemble, and can quickly and accurately complete the assembly between cylindrical cells, thereby improving production efficiency.

[0017] The use of nickel plates reduces contact resistance, decreases energy loss, and improves the energy utilization efficiency of the battery module. The copper busbars and electrode connection plates are securely connected with fastening screws, ensuring a robust connection capable of withstanding high-current charging and discharging and guaranteeing the reliability of the electrical connection.

[0018] The linear heat dissipation holes on the side sheet metal increase the heat dissipation area and accelerate heat dissipation. This can effectively reduce the heat generated by the battery module during charging and discharging, prevent battery thermal runaway, and improve the safety and service life of the battery module.

[0019] Meanwhile, the side sheet metal, end caps, and mounting frame together form the protective structure of the battery module, enhancing its overall strength and stability. During vehicle operation, it effectively resists vibration and impact, protecting the battery from damage. Attached Figure Description

[0020] Figure 1 is an isometric schematic diagram of the overall structure of the present invention; Figure 2 is an exploded schematic diagram of the overall structure of the present invention; Figure 3 is an exploded schematic diagram of a portion of the structure of the present invention (first); Figure 4 is an exploded schematic diagram of a portion of the structure of the present invention (second); Figure 5 is an isometric schematic diagram of the cylindrical cell and combined end block structure of the present invention.

[0021] Figure descriptions: 10. Cylindrical cell; 11. Combined end block; 12. Nickel sheet; 13. Copper busbar; 14. Separator; 15. Side sheet metal; 16. End cap; 17. Electrode connection plate; 18. Sampling line; 19. Protective cover; 20. Mounting frame; 21. Sheet copper sheet; 111. Symmetrical protrusion; 112. Symmetrical groove; 131. Perforated bend; 151. Linear heat dissipation hole; 161. Positive electrode copper sheet; 162. Negative electrode copper sheet; 163. Cover. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] As shown in Figures 1 to 5, an assembly 18650 cylindrical automotive battery module includes multiple cylindrical cells 10. The positive and negative ends of the cylindrical cells 10 are fitted onto an assembly end block 11. A nickel sheet 12 is provided on the other side of the assembly end block 11, and a copper busbar 13 is provided on the other side of the nickel sheet 12. A separator 14 is provided on one side of the copper busbar 13. Side sheet metal 15 is provided on both sides of the battery module, and end caps 16 are provided at both ends of the battery module. Multiple electrode connection plates 17 are provided on the top of the battery module. Sampling lines 18 are provided on the top of the electrode connection plates 17, and a protective cover 19 is provided on the top of the sampling lines 18 and the top of the electrode connection plates 17.

[0024] Multiple cylindrical cells 10 are arranged in 4 series 32 to form a battery module, which is used in multiple series for energy storage devices in electric vehicles or hybrid vehicles.

[0025] The combined end block 11 has a rectangular structure, with symmetrical protrusions 111 on the top and one side, and symmetrical grooves 112 on the bottom and the other side; the symmetrical protrusions 111 and symmetrical grooves 112 of two adjacent combined end blocks 11 can be fitted and assembled.

[0026] The top of the copper busbar 13 is provided with a perforated bend 131 for connection and fixing, which is used to fix the copper sheet 21 to the top of the electrode connection plate 17 by fastening screws.

[0027] The partition 14 is between two adjacent copper busbars 13.

[0028] An outer frame 20 is also provided between the side sheet metal 15 and the outer wall of the battery module.

[0029] The side sheet metal 15 has multiple linear heat dissipation holes 151 distributed through its side wall, and the two side walls of the side sheet metal 15 are connected to the side wall of the end cover 16 by multiple longitudinally distributed screws.

[0030] The top two ends of the end cap 16 are connected to the top two ends of the side sheet metal 15 by long screws.

[0031] One end cap 16 has a positive copper sheet 161 on its side wall, and the other end cap 16 has a negative copper sheet 162 on its side wall. Both the positive copper sheet 161 and the negative copper sheet 162 have a cover 163 on their other side.

[0032] The top of the electrode connecting plate 17 and the bottom of the protective cover 19 are connected by a snap-fit ​​mechanism.

[0033] It should be noted that the combinable 18650 cylindrical automotive battery module in this embodiment is constructed using a 4-series, 32-parallel configuration. That is, every 4 18650 cylindrical cells are connected in series as a group, and a total of 32 groups are connected in parallel.

[0034] Each 18650 cylindrical cell 10 has a combined end block 11 fitted onto its positive and negative ends. The combined end block 11 has a rectangular structure with symmetrical protrusions 111 on the top and one side, and symmetrical grooves 112 on the bottom and the other side. Adjacent combined end blocks 11 are assembled and connected by fitting the symmetrical protrusions 111 and the symmetrical grooves 112, thus achieving the initial assembly between the cylindrical cells 10.

[0035] A nickel sheet 12 is provided on the other side of the combined end block 11. The nickel sheet 12 has good conductivity, which can reduce contact resistance and reduce energy loss. A copper busbar 13 is provided on the other side of the nickel sheet 12. The top of the copper busbar 13 has a perforated bend 131 for connection and fixing. The copper busbar 13 is fixed to the top of the electrode connection plate 17 by fastening screws to achieve electrical connection.

[0036] A partition 14 is installed between two adjacent copper busbars 13. The partition 14 serves to insulate and isolate the copper busbars 13 to prevent short circuits from occurring between them.

[0037] Side sheet metal 15s are provided on both sides of the battery module. An outer frame 20 is provided between the side sheet metal 15s and the outer wall of the battery module, providing protection and support for the battery module. Multiple linear heat dissipation holes 151 are distributed through the side walls of the side sheet metal 15s to facilitate heat dissipation of the battery module. The side walls at both ends of the side sheet metal 15s are connected to the side walls of the end cap 16s by multiple longitudinally distributed screws. The top ends of the end cap 16s are connected to the top ends of the side sheet metal 15s by long screws, enhancing the structural stability of the battery module.

[0038] One end cap 16 has a positive copper plate 161 on its side wall and a negative copper plate 162 on its side wall. Both the positive copper plate 161 and the negative copper plate 162 have a cover 163 on their other side to protect the electrodes and prevent short circuits and external interference.

[0039] Multiple electrode connection plates 17 are set on the top of the battery module. Sampling lines 18 are set on the top of the electrode connection plates 17 for collecting parameters such as voltage and temperature of the battery module. A protective cover 19 is set on the top of the sampling lines 18 and the top of the electrode connection plates 17. The top of the electrode connection plates 17 and the bottom of the protective cover 19 are connected by a snap-fit ​​to protect the sampling lines 18 from damage.

[0040] The working principle of this invention is as follows: When the battery module is charging, the current from the external charging device enters the battery module through the positive copper plate 161, and after passing through the copper busbar 13, nickel plate 12, and combined terminal block 11, it charges each 18650 cylindrical cell 10. During the charging process, the sampling line 18 collects parameters such as voltage and temperature of the battery module in real time and transmits the data to the battery management system (BMS). The BMS monitors and adjusts the charging process based on the collected data to ensure that the battery module is charged safely and efficiently.

[0041] When the battery module discharges, the chemical energy stored in the 18650 cylindrical cell 10 is converted into electrical energy. The current passes through the combined terminal block 11, nickel plate 12, and copper busbar 13, and is output from the negative copper plate 162 to power the electrical equipment of the electric vehicle or hybrid vehicle. Similarly, the sampling line 18 continuously collects the parameters of the battery module. The BMS manages the discharge process based on these parameters to prevent over-discharge of the battery and extend its service life.

[0042] During battery charging and discharging, the 18650 cylindrical cell 10 generates heat. This heat is first conducted to the copper busbar 13 via the combined end block 11 and nickel strip 12, and then transferred to the side sheet metal 15 via the copper busbar 13. The linear heat dissipation holes 151 on the side sheet metal 15 increase the airflow area and accelerate heat dissipation. Simultaneously, the outer frame 20 and end cap 16 also play a role in assisting heat dissipation and protecting the battery module, ensuring that the battery module operates within a suitable temperature range.

[0043] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A combinable 18650 cylindrical automotive battery module, characterized in that, The battery module includes multiple cylindrical cells (10), with the positive and negative ends of each cylindrical cell (10) fitted onto a combined end block (11). A nickel sheet (12) is provided on the other side of the combined end block (11), and a copper busbar (13) is provided on the other side of the nickel sheet (12). A partition plate (14) is provided on one side of the copper busbar (13). Side sheet metal (15) is provided on both sides of the battery module. End caps (16) are provided at both ends of the battery module. Multiple electrode connection plates (17) are provided on the top of the battery module. A sampling line (18) is provided on the top of the electrode connection plate (17), and a protective cover (19) is provided on the top of the sampling line (18) and on the top of the electrode connection plate (17).

2. The combinable 18650 cylindrical automotive battery module according to claim 1, characterized in that, Multiple cylindrical cells (10) are arranged in 4 series and 32 to form the battery module, which is connected in series with multiple energy storage devices for electric vehicles or hybrid vehicles.

3. A combinable 18650 cylindrical automotive battery module according to claim 1, characterized in that, The combined end block (11) is in the form of a rectangular structure, with symmetrical protrusions (111) on the top and one side, and symmetrical grooves (112) on the bottom and the other side; the symmetrical protrusions (111) and symmetrical grooves (112) of two adjacent combined end blocks (11) can be fitted and assembled.

4. A combinable 18650 cylindrical automotive battery module according to claim 1, characterized in that, The copper busbar (13) has a perforated bend (131) at the top for connection and fixing, which is used to fix it to the top of the electrode connection plate (17) by fastening screws and sheet copper plates (21).

5. A combinable 18650 cylindrical automotive battery module according to claim 1, characterized in that, The partition (14) is between two adjacent copper busbars (13).

6. A combinable 18650 cylindrical automotive battery module according to claim 1, characterized in that, An outer frame (20) is also provided between the side sheet metal (15) and the outer wall of the battery module.

7. A combinable 18650 cylindrical automotive battery module according to claim 6, characterized in that, The side sheet metal (15) has multiple linear heat dissipation holes (151) distributed through its side wall, and the two side walls of the side sheet metal (15) are connected to the side wall of the end cap (16) by multiple longitudinally distributed screws.

8. A combinable 18650 cylindrical automotive battery module according to claim 7, characterized in that, The top two ends of the end cap (16) are connected to the top two ends of the side sheet metal (15) by long screws.

9. A combinable 18650 cylindrical automotive battery module according to claim 1, characterized in that, One of the end caps (16) has a positive copper sheet (161) on its side wall, and the other end cap (16) has a negative copper sheet (162) on its side wall. Both the positive copper sheet (161) and the negative copper sheet (162) have a cover (163) on their other side.

10. A combinable 18650 cylindrical automotive battery module according to claim 1, characterized in that, The top of the electrode connecting plate (17) and the bottom of the protective cover (19) are connected by a snap-fit.

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