Flat tube tail portion current collector space increasing structure

Abstract

This utility model relates to a structure for increasing the space of the current collector at the tail of a flat tube. It includes: a current collector assembly comprising a current collector block and a current collector groove formed within the current collector block; a transition assembly disposed on top of the current collector block and communicating with the current collector groove; and a heat dissipation assembly comprising a flat tube inserted into the top of the transition assembly, a chamber penetrating the flat tube and communicating with the current collector groove, and a main partition integrally connected within the flat tube, the main partition dividing the chamber into an inlet chamber and an outlet chamber. The transition assembly is used to increase the space between the flat tube and the current collector block. This utility model's structure for increasing the space of the current collector at the tail of the flat tube expands the internal space of the current collector by adding a transition assembly on top of the current collector block to install the flat tube and increase the thickness of the current collector groove. This avoids the problem of heat accumulation caused by poor flow of the heat dissipation medium, which could affect the battery cell life and safety.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell heat dissipation technology, specifically relating to a structure that increases the current collector space at the tail of a flat tube. Background Technology

[0002] Cylindrical battery cells are widely used in new energy vehicles, energy storage, and other fields. As the energy density of these cells increases, the need for heat dissipation becomes increasingly urgent. For example... Figure 1 , 2 The diagram shows the structure of a flat tube tail current collector in the prior art, where the flat tube is directly inserted into the current collector and then subjected to high-frequency welding. Figure 2 The middle section is a cross-sectional view of the manifold. The top of the manifold has a flat tube groove that matches the size of the flat tube. The flat tube is inserted into the flat tube groove at the top of the manifold and then welded to the top of the manifold. The coolant inside the flat tube circulates through the manifold groove.

[0003] Because the thickness of the flat tube groove is matched with the thickness of the outer flat tube, the thickness of the internal current collector groove of the current collector block cannot be greater than the thickness of the flat tube groove during actual processing (because it is impossible to machine a groove that is thicker on the inside and thinner on the outside through a machining process). This results in the thickness of the internal current collector groove of the current collector block not being greater than the thickness of the flat tube, which leads to a smaller space for the internal current collector groove. The structural space of the tail current collector is limited, which can easily lead to poor flow of heat dissipation medium and heat accumulation, thereby affecting the life and safety of the battery cell. If the thickness of the current collector groove and the flat tube groove is increased, the weld between the flat tube groove and the flat tube will be too large during subsequent welding, which can easily cause coolant leakage. Utility Model Content

[0004] This invention provides a structure that increases the current collector space at the tail of a flat tube, which solves the problem in the prior art where the internal current collector groove space is limited, which easily leads to poor flow of heat dissipation medium and heat accumulation, thereby affecting the life and safety of the battery cell.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a structure for increasing the fluid collection space at the tail end of a flat tube, comprising: A current collection assembly, the current collection assembly including a current collection block and a current collection groove formed in the current collection block; A transition component is disposed on top of the current collection block and is connected to the current collection groove; A heat dissipation assembly includes a flat tube inserted into the top of the transition assembly, a chamber passing through the flat tube and communicating with the collection groove, and a main partition integrally connected inside the flat tube, wherein the main partition divides the chamber into an inlet chamber and an outlet chamber. The transition component is used to increase the space between the flat tube and the manifold.

[0006] Ideally, the current collection assembly also includes a first blocking plate integrally connected to the bottom of the current collection block.

[0007] Optimally, the transition component includes a slot formed on the top of the collector block and connected to the collector groove, a first transition block snapped into the slot, a first slot formed on the top of the first transition block, and a first through groove penetrating the first transition block. The first through groove is used to connect the first slot and the collector groove, and the flat tube is inserted into the first slot.

[0008] Optimally, the heat dissipation assembly further includes a first partition integrally connected to the liquid inlet chamber and spaced apart, a liquid inlet channel formed between adjacent first partitions, a second partition integrally connected to the liquid outlet chamber and spaced apart, and a liquid outlet channel formed between adjacent second partitions.

[0009] Optimally, the current collection assembly further includes a mounting slot formed at the bottom of the current collection block and a second blocking plate inserted into the mounting slot.

[0010] Optimally, the transition component includes a second transition block integrally connected to the top of the current collector block, a second slot opened on the top of the second transition block, and a second through slot penetrating the second transition block. The second through slot is used to connect the second slot and the current collector slot, and the flat tube is inserted into the second slot.

[0011] Optimally, the transition component further includes a first guide portion inclinedly disposed at the top of the card slot and a second guide portion inclinedly disposed at the top of the first slot.

[0012] Optimally, the current collection assembly further includes a third guide portion inclinedly disposed at the bottom of the mounting groove.

[0013] Optimally, the transition component further includes a fourth guide portion inclinedly disposed at the top of the second slot.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model's flat tube tail current collector space enlargement structure adds a transition component to the top of the current collector block to install the flat tube, increasing the thickness of the current collector groove, thereby expanding the internal space of the tail current collector, avoiding heat accumulation caused by poor flow of the heat dissipation medium, and thus improving the life and safety of the battery cell. Attached Figure Description

[0015] Figure 1 This is a simplified schematic diagram of the structure of a flat tube and a collector in the prior art; Figure 2 This is a cross-sectional view of a current collector in the prior art; Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 4 This utility model Figure 3 A sectional view; Figure 5 This utility model Figure 4 Exploded view; Figure 6 This utility model Figure 3 Side sectional view; Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 8 This utility model Figure 7 A sectional view; Figure 9 This utility model Figure 8 Exploded view; Figure 10 This utility model Figure 7 Side sectional view; Figure 11 This is a schematic diagram of the flat tube after it has been folded into a serpentine tube according to the present invention; Explanation of reference numerals in the attached figures: 1. Collector block; 2. First blocking plate; 3. Slot; 4. Collector groove; 5. First guide section; 6. First transition block; 7. First slot; 8. First through groove; 9. Second guide section; 10. Flat tube; 11. Main partition plate; 12. First partition plate; 13. Liquid inlet channel; 14. Second partition plate; 15. Liquid outlet channel; 16. Mounting groove; 17. Third guide section; 18. Second blocking plate; 19. Second transition block; 20. Second slot; 21. Fourth guide section; 22. Second through groove; 23. Flat tube groove. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings. Example

[0017] like Figure 3-6 As shown, the enlarged fluid collection space structure at the tail of the flat tube includes a fluid collection assembly, a transition assembly, and a heat dissipation assembly. The fluid collection assembly includes a fluid collection block 1, a first blocking plate 2, and a fluid collection groove 4. The fluid collection block 1 has a fluid collection groove 4 inside, which is used to connect the inlet chamber and outlet chamber of the flat tube assembly, thereby forming a circulating coolant channel. The first blocking plate 2 is integrally connected to the bottom of the fluid collection block 1 to seal the internal fluid collection groove 4, preventing coolant leakage from the bottom of the fluid collection block 1 during circulation.

[0018] The transition assembly includes a slot 3, a first guide portion 5, a first transition block 6, a first slot 7, a first through slot 8, and a second guide portion 9. The slot 3 is located on the top of the current collector block 1 and communicates with the current collector groove 4. The size of the slot 3 is larger than the size of the current collector groove 4, thus forming a shoulder structure between the slot 3 and the current collector groove 4. When the first transition block 6 of the transition assembly is inserted into the slot 3, the first transition block 6 will be locked in the slot 3, preventing the first transition block 6 from falling downwards and causing the space in the current collector groove 4 to become smaller. After the first transition block 6 is inserted into the slot 3, it is fixed to the current collector block 1 by welding.

[0019] The first guide part 5 is inclinedly disposed on the top of the slot 3. When the first transition block 6 is inserted, it guides the first transition block 6 to facilitate its placement into the slot 3. The depth of the first transition block 6 is equal to the depth of the slot 3. After the first transition block 6 is inserted into the slot 3, its upper surface is flush with the upper surface of the current collector 1.

[0020] The first slot 7 is located on the top of the first transition block 6. The first slot 7 is sized to fit the flat tube 10 and is used to insert the flat tube 10. The first through slot 8 is located at the bottom of the first slot 7 and extends vertically through the first transition block 6. When the first transition block 6 is inserted into the top of the collector block 1, the first slot 7 and the collector slot 4 are connected through the first through slot 8 to ensure the circulation of coolant.

[0021] The size of the first slot 7 is larger than the size of the first through slot 8, thus forming a shoulder structure between the first slot 7 and the first through slot 8. When the flat tube 10 is inserted into the first slot 7, it will be stuck at the bottom of the first slot 7, limiting the insertion depth of the flat tube 10 and preventing it from falling downwards. The second guide part 9 is inclinedly disposed at the top of the first slot 7 to guide the inserted flat tube 10, facilitating its insertion into the first slot 7.

[0022] The heat dissipation assembly includes a flat tube 10, a main partition 11, a first partition 12, an inlet channel 13, a second partition 14, and an outlet channel 15. The cross-section of the flat tube 10 matches the shape of the first slot 7, so the flat tube 10 is inserted into the first slot 7 and then fixed together by welding. The chamber extends vertically through the flat tube 10 and is connected to the first slot 7. The main partition 11 is vertically arranged in the chamber, dividing the chamber into an inlet chamber and an outlet chamber. Coolant enters from the inlet chamber and then flows to the outlet chamber through the collection channel 4 (the flat tube 10 is an aluminum plate, and the main partition 11, the first partition 12, the second partition 14, the inlet channel 13, and the outlet channel 15 are formed in the flat tube 10 by integral extrusion).

[0023] Multiple first baffles 12 are integrally extruded into the liquid inlet chamber, and are spaced apart within the liquid inlet chamber, forming a liquid inlet channel 13 between adjacent first baffles 12. Multiple second baffles 14 are integrally extruded into the liquid outlet chamber, and are spaced apart within the liquid outlet chamber, forming a liquid outlet channel 15 between adjacent second baffles 14. Coolant flows in from the liquid inlet channel 13, passes through the collection tank 4, and then flows to the liquid outlet channel 15. By providing multiple sets of liquid inlet channels 13 and liquid outlet channels 15, the design of multiple flow channels increases the overall structural strength, prevents channel collapse during bending, and also enhances heat exchange efficiency.

[0024] The flat tube 10 is made of aluminum plate. On the one hand, aluminum plate is lightweight and easy to handle, which can reduce the overall weight of the battery cell; on the other hand, aluminum plate has good heat dissipation performance, which is beneficial to the heat dissipation of the battery cell.

[0025] like Figure 9 As shown, in practical applications, the flat tube is folded into 10... Figure 9 The serpentine tube shown is designed to match the circumference of the cylindrical battery cell for heat dissipation. The strength of the overall structure is increased by incorporating a first baffle 12 and a second baffle 14 within the flat tube 10, preventing channel collapse during bending.

[0026] like Figure 6 As shown, in this embodiment, since a first transition block 6 is provided between the current collector 1 and the flat tube 10, the size of the external flat tube 10 is matched by the first transition block 6. Therefore, the thickness of the current collector groove 4 can be increased during processing, so that the thickness of the current collector groove 4 is greater than the thickness of the flat tube 10. This expands the internal space of the tail current collector, avoids heat accumulation caused by poor flow of heat dissipation medium, and thus improves the life and safety of the battery cell. Example

[0027] The technical solution of Embodiment 2 is basically the same as that of Embodiment 1, the difference being the different current collection components and transition components, such as... Figure 7-10 As shown, in this embodiment, the coolant collection assembly includes a coolant collection block 1, a coolant collection groove 4, a mounting groove 16, a third guide portion 17, and a second blocking plate 18. The coolant collection block 1 is provided with a coolant collection groove 4, which is used to connect the inlet chamber and outlet chamber of the flat tube assembly, thereby forming a circulating coolant channel.

[0028] The mounting groove 16 is located at the bottom of the manifold 1, and its size is larger than that of the manifold 4. Therefore, a shoulder structure is formed between the mounting groove 16 and the manifold 4 to limit the insertion of the second blocking plate 18 into the mounting groove 16. The second blocking plate 18 is inserted into the mounting groove 16 at the bottom of the manifold 1 and then fixed together by welding to seal the manifold 4 and prevent the coolant in the manifold 4 from leaking.

[0029] The transition assembly includes a second transition block 19, a second slot 20, a fourth guide portion 21, and a second through slot 22. The second transition block 19 is integrally connected to the top of the collector block 1. The second slot 20 is located on the top of the second transition block 19, and the second through slot 22 is located at the bottom of the second slot 20 and extends through the second transition block 19. The second slot 20 is connected to the collector slot 4 through the second through slot 22, and the size of the second slot 20 is larger than the size of the second through slot 22. Therefore, a shoulder structure is formed between the second slot 20 and the second through slot 22. When the flat tube 10 is inserted into the second slot 20, the flat tube 10 is limited, the insertion depth of the flat tube 10 is controlled, and the flat tube 10 is prevented from falling downwards.

[0030] The fourth guide section 21 is inclinedly disposed at the top of the second slot 20 to guide the flat tube 10 and ensure that the flat tube 10 is more easily inserted into the second slot 20.

[0031] like Figure 10 As shown, in this embodiment, since a second transition block 19 is provided between the current collector 1 and the flat tube 10, the size of the external flat tube 10 is matched by the second transition block 19. Therefore, the thickness of the current collector groove 4 can be increased from the bottom during processing, so that the thickness of the current collector groove 4 is greater than the thickness of the flat tube 10. Finally, the second blocking plate 18 is welded to the bottom of the current collector 1 to expand the internal space of the tail current collector, avoid heat accumulation caused by poor flow of heat dissipation medium, and thus improve the life and safety of the battery cell.

[0032] The structure that increases the current collector space at the tail of the flat tube is achieved by adding a transition component to the top of the current collector block 1 to install the flat tube 10, thereby avoiding the flat tube 10 being directly inserted into the current collector block 1. This increases the thickness of the current collector groove, expands the internal space of the current collector at the tail, avoids the problem of heat accumulation caused by poor flow of heat dissipation medium, and improves the service life and safety of the battery cell.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A structure for increasing the fluid collection space at the tail end of a flat tube, characterized in that, It includes: A current collection assembly, the current collection assembly including a current collection block (1) and a current collection groove (4) formed in the current collection block (1); A transition component is disposed on the top of the collection block (1) and is connected to the collection groove (4); The heat dissipation assembly includes a flat tube (10) inserted into the top of the transition assembly, a chamber that passes through the flat tube (10) and communicates with the collection groove (4), and a main partition (11) integrally connected in the flat tube (10), wherein the main partition (11) divides the chamber into an inlet chamber and an outlet chamber. The transition component is used to increase the space between the flat tube (10) and the collector block (1).

2. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 1, characterized in that: The current collection assembly also includes a first blocking plate (2) integrally connected to the bottom of the current collection block (1).

3. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 1, characterized in that: The transition component includes a slot (3) formed on the top of the collector block (1) and connected to the collector groove (4), a first transition block (6) snapped into the slot (3), a first slot (7) formed on the top of the first transition block (6), and a first through groove (8) penetrating the first transition block (6). The first through groove (8) is used to connect the first slot (7) and the collector groove (4). The flat tube (10) is inserted into the first slot (7).

4. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 1, characterized in that: The heat dissipation assembly further includes a first partition (12) integrally connected to the liquid inlet chamber and spaced apart, a liquid inlet channel (13) formed between adjacent first partitions (12), a second partition (14) integrally connected to the liquid outlet chamber and spaced apart, and a liquid outlet channel (15) formed between adjacent second partitions (14).

5. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 1, characterized in that: The current collection assembly also includes a mounting groove (16) formed at the bottom of the current collection block (1) and a second blocking plate (18) inserted into the mounting groove (16).

6. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 1, characterized in that: The transition component includes a second transition block (19) integrally connected to the top of the collector block (1), a second slot (20) opened on the top of the second transition block (19), and a second through slot (22) penetrating the second transition block (19). The second through slot (22) is used to connect the second slot (20) and the collector slot (4). The flat tube (10) is inserted into the second slot (20).

7. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 3, characterized in that: The transition component also includes a first guide portion (5) inclinedly disposed at the top of the card slot (3) and a second guide portion (9) inclinedly disposed at the top of the first slot (7).

8. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 5, characterized in that: The current collection assembly also includes a third guide portion (17) that is inclinedly disposed at the bottom of the mounting groove (16).

9. The structure for increasing the space for the current collector at the tail of a flat tube according to claim 6, characterized in that: The transition assembly also includes a fourth guide (21) that is inclinedly disposed on top of the second slot (20).

Images