Cylindrical battery pack structure

Abstract

The utility model relates to a cylindrical battery pack structure which comprises a staggered battery module, an air-liquid cooling exchange system and a box body, and the staggered battery module and the air-liquid cooling exchange system are both integrated in the box body; the staggered arrangement battery module comprises a plurality of rows and a plurality of columns of cylindrical battery cells, and every two adjacent rows of cylindrical battery cells are arranged in a staggered mode. According to the cylindrical battery pack structure provided by the utility model, the two adjacent rows of cylindrical battery cells are arranged in a staggered manner to form the staggered battery module, so that invalid gaps between the cylindrical battery cells can be reduced, a natural air duct is formed, the flowing efficiency of air / liquid cooling media is improved, and heat exchange inside and outside the battery pack is carried out through the air-liquid cooling exchange system; the heat dissipation performance of the battery pack is improved, so that the large cylindrical lithium iron phosphate cell can be applied to an energy storage project.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a cylindrical battery pack structure. Background Technology

[0002] To achieve energy conservation and emission reduction, electrochemical energy storage is booming, with policy support driving research and development and application, and market demand growth providing impetus.

[0003] Lithium iron phosphate cylindrical batteries have advantages such as high rate capability, good safety performance, and flexible series and parallel connection. However, existing energy storage technologies all use square cells, and there is a lack of a battery pack structure suitable for lithium iron phosphate cylindrical batteries. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a cylindrical battery pack structure. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] A cylindrical battery pack structure includes: staggered battery modules, a wind-liquid cooling exchange system, and a housing, wherein the staggered battery modules and the wind-liquid cooling exchange system are both integrated inside the housing;

[0006] The staggered battery module includes several rows and several columns of cylindrical cells, wherein the cylindrical cells in adjacent rows are staggered.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] This utility model provides a cylindrical battery pack structure that, by arranging adjacent rows of cylindrical cells in a staggered manner to form a staggered battery module, reduces the ineffective gaps between the cylindrical cells and forms a natural airflow channel, improving the flow efficiency of the air / liquid cooling medium. Furthermore, it improves the heat dissipation performance of the battery pack by conducting internal and external heat exchange through an air-liquid cooling exchange system, enabling the large cylindrical lithium iron phosphate cells to be used in energy storage projects. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a cylindrical battery pack structure according to an embodiment of the present invention;

[0010] Figure 2 This is a front view of the staggered battery module in an embodiment of this utility model;

[0011] Figure 3 This is a side view of the staggered battery module in an embodiment of this utility model;

[0012] Figure 4 This is a schematic diagram of the end face of the box in an embodiment of this utility model.

[0013] Figure label:

[0014] 01: Cylindrical battery cell; 02: Voltage acquisition board; 03: Busbar; 04: Screw; 05: Insulating sheet; 06: Epoxy resin board; 07: End plate; 08: Waist-shaped hole; 09: Fiberglass tube; 10: Pull rod; 11: Communication socket; 12: Staggered battery module; 13: Air-liquid cooling exchanger; 14: Housing; 15: Liquid coolant inlet / outlet plugs; 16: Fire sprinkler head; 17: Soft water pipe; 18: MSD fuse switch box; 19: Positive and negative sockets; 20: Pressure relief valve. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0016] Example 1

[0017] Please see Figure 1 , Figure 1 This is a schematic diagram of a cylindrical battery pack structure according to an embodiment of the present invention.

[0018] This embodiment provides a cylindrical battery pack structure, including: staggered battery modules 12, a wind-liquid cooling exchange system, and a housing 14, wherein the staggered battery modules 12 and the wind-liquid cooling exchange system are both integrated inside the housing 14. The staggered battery modules 12 include several rows and several columns of cylindrical cells 01, wherein adjacent rows of cylindrical cells 01 are staggered.

[0019] Please combine Figure 2 and Figure 3 , Figure 2 This is a front view of the staggered battery module in an embodiment of this utility model. Figure 3 This is a side view of the staggered battery module in an embodiment of this utility model.

[0020] In this embodiment, the cylindrical cells 01 in odd-numbered rows are arranged in alignment with each other, and the cylindrical cells 01 in even-numbered rows are arranged in alignment with each other. Each cylindrical cell 01 in an even-numbered row is located between every two adjacent cylindrical cells 01 in an odd-numbered row.

[0021] Specifically, several cylindrical cells 01 are connected in series according to a certain positive and negative polarity direction. Taking one series of cylindrical cells 01 as a unit, several series of cylindrical cells 01 are then connected in parallel in rows and columns with a vertical (row spacing) of 40mm and a horizontal (column spacing) of 69.3mm. For example Figure 3As shown, the top row is the first row, the leftmost row is the first column, and the cylindrical cell 01 in the first column of the second row is located between the cylindrical cells 01 in the first and second columns of the first row. This staggered arrangement reduces ineffective gaps between the cylindrical cells 01, allowing more cells to be accommodated within the same volume, avoiding the space waste caused by traditional row and column alignment. Furthermore, the gaps created by the staggered arrangement form natural airflow channels, improving the flow efficiency of the air / liquid cooling medium and enhancing the heat dissipation performance of the battery pack. For example, the cylindrical cell 01 is a 38121 cell, and the positive and negative terminals of the cell are welded to M4 copper-plated screws and nuts.

[0022] In this embodiment, the air-liquid cooling exchange system includes: an air-liquid cooling exchanger 13, a refrigerant inlet / outlet connector 15, and a soft water pipe 17. The air-liquid cooling exchanger 13 is located at one end of the housing 14. The refrigerant inlet / outlet connector 15 is located at the other end of the housing 14. The soft water pipe 17 is located inside the housing 14, and its two ends are connected to the air-liquid cooling exchanger 13 and the refrigerant inlet / outlet connector 15, respectively.

[0023] Specifically, the air-liquid cooling exchanger 13 consists of two electric fans and one heat exchanger. The liquid coolant inlet / outlet plug 15 is a movable plug. In this embodiment, the cylindrical battery cell 01 heats up relatively evenly. The heat generated during charging and discharging is drawn to the heat exchanger by the electric fans, where it exchanges heat with the liquid coolant. External low-temperature liquid coolant reaches the heat exchanger via the liquid coolant inlet / outlet plug 15 and the soft water pipe 17, where it also exchanges heat. The liquid coolant carries away the heat, thus achieving heat exchange for the entire battery pack. This embodiment achieves efficient temperature control by using air cooling and liquid cooling in tandem, utilizing forced convection from the fans and external liquid cooling circulation.

[0024] In this embodiment, the staggered battery module 12 further includes: a voltage acquisition board 02, a busbar 03, an insulating sheet 05, an epoxy resin board 06, an end plate 07, a fiberglass tube 09, and a pull rod 10. The voltage acquisition board 02 is disposed at both ends of each cylindrical cell 01 and is used to acquire the voltage of the cylindrical cell 01. The busbar 03 is disposed at both ends of several rows and columns of cylindrical cells 01 and is used to collect the current of the cylindrical cells 01. The insulating sheet 05, epoxy resin board 06, and end plate 07 are sequentially disposed at both ends of the busbar 03 from the inside out. The pull rod 10 passes through the staggered battery module 12 and is used to fix the cylindrical cells 01. The fiberglass tube 09 is sleeved on the outer surface of the pull rod 10 and is used to insulate the pull rod 10.

[0025] like Figure 2As shown, several rows and columns of cylindrical battery cells 01 are arranged from the inside out at one end and the other end with a busbar 03, an insulating sheet 05, an epoxy resin board 06, and an end plate 07. A fiberglass tube 09 and a pull rod 10 pass through the two end plates 07. The busbar 03 and the cylindrical battery cells 01 are fixedly connected by screws 04. The end plate 07 is made of sheet metal, and the end plate 07 and the housing 14 are tightly fixed to the fixing beam of the housing 14 by welding nuts through the oblong holes 08. Furthermore, the voltage acquisition board 02 is an FR-4 PCB board with certain circuits. The voltage acquisition board 02 is used to acquire the voltage of the cylindrical battery cells 01 and also plays a certain role in bearing weight. The insulating sheet 05 is used for insulation, and the epoxy resin board 06 is used for insulation and to fix the insulating sheet 05 and the end plate 07.

[0026] like Figure 4 As shown, Figure 4 This is a schematic diagram of the end face of the housing in this embodiment of the utility model. In this embodiment, the housing 14 is a sheet metal structure with an IP67 rating. The housing 14 also integrates a communication socket 11, a fire sprinkler head 16, positive and negative sockets 19, an MSD fuse switch box 18, and a pressure relief valve 20. The communication socket 11 serves as the internal and external communication interface for the battery pack. The fire sprinkler head 16 serves as the extinguishing agent spray nozzle, directly integrating the fire protection system into the battery pack, thus improving the safety of the energy storage battery. The positive and negative sockets 19 provide an interface for connecting the positive and negative terminals of the staggered battery modules 12 to external circuits, enabling the cylindrical cells 01 in the staggered battery modules 12 to transfer stored electrical energy to electrical devices, or to transfer electrical energy from an external power source to the battery for charging. The pressure relief valve 20 is used to release internal pressure when a certain pressure is reached inside the battery pack.

[0027] This embodiment provides a cylindrical battery pack structure that forms a staggered battery module 12 by arranging adjacent rows of cylindrical cells 01 in a staggered manner. This reduces the ineffective gaps between the cylindrical cells 01 and forms a natural airflow channel, improving the flow efficiency of the air / liquid cooling medium. Furthermore, the battery pack's internal and external heat exchange is carried out through an air-liquid cooling exchange system, improving the battery pack's heat dissipation performance and enabling the application of large cylindrical lithium iron phosphate cells in energy storage projects.

[0028] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A cylindrical battery pack structure, characterized by, include: The battery module (12), the air-liquid cooling exchange system and the housing (14) are arranged in a staggered manner, wherein the staggered battery module (12) and the air-liquid cooling exchange system are both integrated inside the housing (14); The staggered battery module (12) includes several rows and several columns of cylindrical cells (01), wherein the cylindrical cells (01) in adjacent rows are staggered. The cylindrical cells (01) in the odd-numbered rows are aligned with each other, and the cylindrical cells (01) in the even-numbered rows are aligned with each other, and each cylindrical cell (01) in the even-numbered rows is located between every two adjacent cylindrical cells (01) in the odd-numbered rows. The air-liquid cooling exchange system includes: an air-liquid cooling exchanger (13), liquid refrigerant inlet and outlet connectors (15), and soft water pipes (17), wherein, The air-liquid cooling exchanger (13) is located at one end of the housing (14); The liquid coolant inlet / outlet plug (15) is located at the other end of the housing (14); The soft water pipe (17) is installed inside the housing (14), and the two ends of the soft water pipe (17) are respectively connected to the air-liquid cooling exchanger (13) and the liquid coolant inlet / outlet plug (15).

2. The cylindrical battery pack structure according to claim 1, characterized in that, The staggered battery module (12) further includes: a voltage acquisition board (02) and a busbar (03), wherein, The voltage acquisition board (02) is disposed at both ends of each cylindrical cell (01) for acquiring the voltage of the cylindrical cell (01); The busbar (03) is disposed at both ends of the cylindrical cells (01) in the plurality of rows and columns, for collecting the current of the cylindrical cells (01).

3. The cylindrical battery pack structure according to claim 2, characterized in that, The staggered battery module (12) further includes: an insulating sheet (05), an epoxy resin board (06), and an end plate (07), wherein, The insulating sheet (05), the epoxy resin board (06), and the end plate (07) are arranged sequentially from the inside to the outside of the busbar (03).

4. The cylindrical battery pack structure according to claim 3, characterized in that, The end plate (07) has a waist-shaped hole (08) for connecting the box body (14).

5. A cylindrical battery pack structure according to claim 4, characterized in that, The staggered battery module (12) further includes: a glass fiber tube (09) and a pull rod (10), wherein, The pull rod (10) passes through the staggered battery module (12) and is used to fix the cylindrical battery cell (01); The fiberglass tube (09) is sleeved on the outer surface of the pull rod (10) and is used to insulate the pull rod (10).

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