Charging pile conducting bar and production process

Abstract

The invention relates to the field of conducting bars, in particular to a charging pile conducting bar and a production process, the charging pile conducting bar comprises a conductive cell, the conductive cell is internally provided with a plurality of cell liquid cooling holes, the plurality of cell liquid cooling holes are distributed along the width direction of the conductive cell, and the plurality of cell liquid cooling holes are arranged along the length direction of the conductive cell in a penetrating manner. On the premise that the occupied space of the conducting bar is reduced, the heat dissipation effect of the conducting bar is ensured.

Description

Technical Field

[0001] The present application relates to the field of conductive bars, and in particular to a conductive bar for a charging pile and a production process. Background Art

[0002] Conductive bar, also known as busbar or busbar, is a device used for current transmission in power system, usually made of metal materials with good conductivity such as copper and aluminum. Different from conductive beam, conductive bar is mainly responsible for collecting, distributing and transmitting large current in power system, and is often used in charging piles to improve the charging efficiency of cars.

[0003] The conductive busbar generally includes a conductive core and an outer insulating layer applied to the conductive core. The production process thereof can be referred to the invention patent with publication number CN114474655A and the name thereof being a continuous production device for copper-aluminum busbar extrusion and a production method thereof.

[0004] In the existing related technologies, as the power of the charging pile increases, the current carried by the conductive bar also increases, which makes the conductive bar heat up more seriously and restricts the transmission of current. In order to reduce the degree of heating of the power generation bar, the conductive bar generally needs to be air-cooled or liquid-cooled. For example, the utility model patent with announcement number CN 217881973 U discloses a conductive bar structure and a conductive bar assembly. By installing a liquid cooling pipe on one side of the conductive bar, the heat of the conductive bar is absorbed by the refrigerant in the liquid cooling pipe, thereby reducing the degree of heating of the conductive bar.

[0005] With respect to the above-mentioned related technologies, the conductive bar equipped with the liquid cooling tube is relatively large in size, so that the conductive bar occupies a large amount of internal space of the charging pile, which is not convenient for reducing the floor space of the charging pile. Summary of the invention

[0006] In order to ensure the heat dissipation effect of the conductive bar while reducing the space occupied by the conductive bar, the present application provides a charging pile conductive bar and a production process.

[0007] The present application provides a charging pile conductive bar adopting the following technical solution: A charging pile conductive bar comprises a conductive battery cell, wherein a plurality of battery cell liquid cooling holes are provided inside the conductive battery cell, wherein the plurality of battery cell liquid cooling holes are distributed along the width direction of the conductive battery cell, and the plurality of battery cell liquid cooling holes are all arranged through the length direction of the conductive battery cell.

[0008] By adopting the above technical solution, the cell liquid cooling hole is opened in the conductive cell, which is not easy to increase the volume of the conductive bar, and is convenient for arrangement in a relatively narrow charging pile. In addition, the cell liquid cooling hole opened in the conductive bar is also conducive to increasing the contact area between the coolant and the conductive bar, thereby ensuring the cooling effect of the cell liquid cooling hole on the conductive bar.

[0009] Optionally, the conductive battery cell includes a first battery cell and a second battery cell, the first battery cell is provided with a plurality of first liquid cooling grooves, the second battery cell is provided with a plurality of second liquid cooling grooves, the plurality of first liquid cooling grooves are respectively arranged corresponding to the second liquid cooling grooves, and the battery cell liquid cooling hole is formed by connecting the first liquid cooling grooves with the second liquid cooling grooves.

[0010] By adopting the above technical solution, the battery cell liquid cooling hole is formed by connecting the first battery cell and the second battery cell after the first liquid cooling groove and the second liquid cooling groove are formed respectively, which is helpful to reduce the difficulty of forming the battery cell liquid cooling hole.

[0011] Optionally, the corners of the inner wall of the first liquid cooling tank, the corners of the inner wall of the second liquid cooling tank, the corners of the first battery cell close to the second battery cell, and / or the corners of the second battery cell close to the first battery cell are chamfered.

[0012] By adopting the above technical solution, it is helpful to reduce the occurrence of tip discharge at the corners of the inner wall of the first liquid cooling tank, the corners of the inner wall of the second liquid cooling tank, the corners of the first battery cell close to the second battery cell and / or the corners of the second battery cell close to the first battery cell due to the close distance between the first battery cell and the second battery cell, thereby helping to improve the reliability of the conductive bus.

[0013] Optionally, the charging pile conductive bar further includes a first inner insulating layer and a second inner insulating layer, the first inner insulating layer is applied to the first battery cell, the second inner insulating layer is applied to the second battery cell, and the first battery cell and the second battery cell are insulated from each other.

[0014] By adopting the above technical solution, the first battery cell and the second battery cell are insulated and independent from each other, so that the first battery cell and the second battery cell are used to carry different currents respectively, which is beneficial to improving the applicability of the conductive bar.

[0015] Optionally, the charging pile conductive bar further includes a first shielding layer and a second shielding layer, the first shielding layer is laid on the first inner insulating layer, and the second shielding layer is laid on the second inner insulating layer.

[0016] By adopting the above technical solution, it is advantageous to prevent the first battery cell and the second battery cell from interfering with each other due to being too close.

[0017] Optionally, a liquid cooling tube is provided inside the battery cell liquid cooling hole, and the liquid cooling tube has insulating properties.

[0018] By adopting the above technical solution, the coolant in the liquid cooling tube is not easy to directly contact the first battery cell and / or the second battery cell, which is helpful to reduce the adverse effects of coolant leakage, leakage and burning.

[0019] Optionally, the charging pile conductive bar further includes an outer insulating layer, and the outer insulating layer is applied on the conductive battery core.

[0020] The adoption of the above technical solution is helpful to reduce the occurrence of damage to the conductive battery cells due to external conditions.

[0021] The present application also provides a production process for a charging pile conductive bar, which adopts the following technical solution: A production process of a charging pile conductive bar, comprising the following steps: S1, forming a first battery cell and a second battery cell; S2, opening a plurality of first liquid cooling grooves on one side of the first battery cell, and opening a plurality of second liquid cooling grooves on one side of the second battery cell; S3. Connect and fix the first battery core and the second battery core to each other, and make a plurality of the first liquid cooling grooves connected to the second liquid cooling grooves respectively to form a plurality of battery core liquid cooling holes.

[0022] By adopting the above technical solution, the first battery cell and the second battery cell are manufactured separately and then combined to form a conductive bar, which is helpful to reduce the manufacturing difficulty of the conductive bar with liquid cooling holes for the battery cells.

[0023] Optionally, in the step S2, the first liquid cooling groove and the second liquid cooling groove are formed by rolling with a slotted roller, and the slotted roller is provided with a slotted protrusion, and the slotted protrusion is used to form the first liquid cooling groove or the second liquid cooling groove.

[0024] By adopting the above technical solution, the first liquid cooling groove and the second liquid cooling groove are rolled and formed by the slotted roller, which is helpful to reduce the difficulty of forming the first liquid cooling groove and the second liquid cooling groove.

[0025] Optionally, the S3 step includes the following steps: S31, disposing a plurality of liquid cooling tubes between the first battery core and the second battery core, and making the plurality of liquid cooling tubes correspond to between each first liquid cooling tank and the second liquid cooling tank respectively; S32, allowing the first battery cell, the second battery cell and each liquid cooling tube to pass through an extruder, and forming an outer insulating layer through the extruder, and allowing the liquid cooling tube to be laid in the liquid cooling hole of the battery cell by the outer insulating layer.

[0026] By adopting the above technical solution, the first battery core, the second battery core and each liquid cooling tube are covered by the outer insulating layer and combined into a whole after passing through the mold of the extruder, which is convenient and quick.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cell liquid cooling hole is opened in the conductive cell, which is not easy to increase the volume of the conductive bar, and is convenient for layout in a relatively narrow charging pile. In addition, the cell liquid cooling hole opened in the conductive bar is also conducive to increasing the contact area between the coolant and the conductive bar, thereby ensuring the cooling effect of the cell liquid cooling hole on the conductive bar; 2. After the first liquid cooling tank and the second liquid cooling tank are formed respectively, the liquid cooling hole of the battery cell is formed by connecting the first battery cell and the second battery cell, which is conducive to reducing the difficulty of forming the liquid cooling hole of the battery cell; 3. It is helpful to reduce the occurrence of tip discharge at the corners of the inner wall of the first liquid cooling tank, the corners of the inner wall of the second liquid cooling tank, the corners of the first battery cell close to the second battery cell and / or the corners of the second battery cell close to the first battery cell due to the close distance between the first battery cell and the second battery cell, thereby helping to improve the reliability of the conductive bus. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional schematic diagram of the conductive bar of the charging pile in Example 1 of the present application.

[0029] Figure 2 It is a cross-sectional schematic diagram of the conductive bar of the charging pile in Example 2 of the present application.

[0030] Figure 3 It is a cross-sectional schematic diagram of the conductive bar of the charging pile in Example 3 of the present application.

[0031] Figure 4 yes Figure 3 An enlarged schematic diagram of part A.

[0032] Figure 5 It is an overall schematic diagram of the grooved roller in Example 4 of the present application.

[0033] Explanation of the reference numerals: 1. conductive battery cell; 11. first battery cell; 111. first liquid cooling tank; 12. second battery cell; 121. second liquid cooling tank; 101. battery cell liquid cooling hole; 2. outer insulating layer; 3. first inner insulating layer; 4. first shielding layer; 5. second inner insulating layer; 6. second shielding layer; 7. liquid cooling tube; 8. slotted roller; 81. slotted protrusion. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] Embodiment 1: The present application embodiment discloses a charging pile conductive bar. Figure 1 The charging pile conductive bar includes a conductive battery core 1 and an outer insulating layer 2. The cross section of the conductive battery core 1 is rectangular, the material of the outer insulating layer 2 has insulating properties, and the outer insulating layer 2 is laid on the conductive battery core 1 so that the conductive battery core 1 is not easily disturbed by the outside.

[0036] A plurality of cell liquid cooling holes 101 are provided inside the conductive cell 1, and specifically in the embodiment of the present application, the number of the cell liquid cooling holes 101 is two, and the two cell liquid cooling holes 101 are distributed along the width direction of the conductive cell 1, and the two cell liquid cooling holes 101 are arranged far away from each other, so as to evenly dissipate heat from all parts of the conductive cell 1 through the coolant in the cell liquid cooling hole 101. The coolant is used to absorb the heat generated during the power-on process of the conductive cell 1, and the material of the coolant can be water, ethylene glycol, propylene glycol and / or silicone oil, etc. The cross-section of the cell liquid cooling hole 101 is circular to reduce the generation of tip discharge. The cell liquid cooling hole 101 is arranged to penetrate along the length direction of the conductive cell 1, so that the coolant flows from one end of the conductive cell 1 to the other end of the conductive cell 1, and then takes away the heat of the conductive cell 1 along the length direction of the conductive cell 1, thereby alleviating the degree of heating of the conductive cell 1.

[0037] The implementation principle of the conductive bar of a charging pile in Example 1 of the present application is as follows: the cell liquid cooling hole 101 is opened in the conductive cell 1, which is not easy to increase the volume of the conductive bar, and is convenient for arrangement in a relatively narrow charging pile. In addition, the cell liquid cooling hole 101 opened in the conductive bar is also conducive to increasing the contact area between the coolant and the conductive bar, thereby ensuring the cooling effect of the cell liquid cooling hole 101 on the conductive bar.

[0038] Embodiment 2: The embodiment of the present application discloses a charging pile conductive bar, which includes all the technical features of embodiment 1 and also includes the following technical features: the conductive battery cell 1 includes a first battery cell 11 and a second battery cell 12, and the first battery cell 11 and the second battery cell 12 are connected to each other so as to transmit current through the first battery cell 11 and the second battery cell 12. The first battery cell 11 has two first liquid cooling grooves 111, and the cross-sectional shape of the two first liquid cooling grooves 111 is semicircular. The second battery cell 12 has two second liquid cooling grooves 121, and the cross-sectional shape of the two liquid cooling grooves is semicircular. The two first liquid cooling grooves 111 are respectively arranged corresponding to each second liquid cooling groove 121. The first liquid cooling groove 111 is connected to the second liquid cooling groove 121 to form a battery liquid cooling hole 101 with a circular cross-sectional shape, so as to reduce the difficulty of opening a battery liquid cooling hole 101 in a conductive battery cell 1 with a longer length.

[0039] The implementation principle of the conductive bar of a charging pile in Example 2 of the present application is: by dividing the conductive battery cell 1 into a first battery cell 11 and a second battery cell 12, manufacturing and molding them separately and then merging them, the difficulty of opening the battery cell liquid cooling hole 101 in the conductive battery cell 1 with a longer length is reduced.

[0040] Embodiment 3: The present application embodiment discloses a charging pile conductive bar, which includes all the technical features of embodiment 2 and also includes the following technical features; Reference Figure 3 and Figure 4 The two corners of the inner wall of the first liquid cooling tank 111, the two corners of the inner wall of the second liquid cooling tank 121, the two corners of the first battery cell 11 close to the second battery cell 12, and the two corners of the second battery cell 12 close to the first battery cell 11 are all chamfered to reduce the occurrence of tip discharge between the first battery cell 11 and the second battery cell 12 which are close to each other, affecting current transmission and causing damage to the conductive bar.

[0041] The conductive bar of the charging pile also includes a first inner insulating layer 3 and a first shielding layer 4. The first inner insulating layer 3 is laid on the surface of the first battery cell 11 and the inner wall of the first liquid cooling tank 111. The first shielding layer 4 is laid on the surface of the first inner insulating layer 3 so that the current in the first battery cell 11 is not easily disturbed by the second battery cell 12 or causes interference to the second battery cell 12.

[0042] The conductive bar of the charging pile also includes a second inner insulating layer 5 and a second shielding layer 6. The second inner insulating layer 5 is laid on the surface of the second battery cell 12 and the inner wall of the second liquid cooling tank 121. The second shielding layer 6 is laid on the surface of the second inner insulating layer 5 so that the current in the second battery cell 12 is not easily disturbed by the first battery cell 11 or causes interference to the first battery cell 11.

[0043] A liquid cooling tube 7 is provided inside the battery cell liquid cooling hole 101, and the liquid cooling tube 7 extends along the extension direction of the battery cell liquid cooling hole 101. The liquid cooling tube 7 has insulation and flexibility, so that the coolant in the liquid cooling tube 7 is not easy to contact the first battery cell 11 and the second battery cell 12, thereby reducing the adverse effects of coolant leakage, leakage and burning. In addition, the flexible liquid cooling tube 7 also facilitates the liquid cooling tube 7 to bend with the bending of the conductive bar, so as to facilitate the installation and connection of the conductive bar in the charging pile.

[0044] The outer insulating layer 2 is located on the side of the first shielding layer 4 away from the first battery cell 11 and the second shielding layer 6 away from the second battery cell 12, and the outer insulating layer 2 also extends between the first battery cell 11 and the second battery cell 12, and the outer insulating layer 2 also covers the liquid cooling tube 7 located in the two battery cell liquid cooling holes 101, so that the first battery cell 11 and the second battery cell 12 are insulated, and the coolant in the liquid cooling tube 7 is less likely to contact the first battery cell 11 and the second battery cell 12.

[0045] The implementation principle of the conductive bar of a charging pile in embodiment 2 of the present application is as follows: the liquid cooling tube 7 cools down and dissipates the first battery cell 11 and the second battery cell 12, and the first battery cell 11 and the second battery cell 12 are insulated and independent from each other through the first shielding layer 4, the second shielding layer 6 and the outer insulating layer 2, so that the first battery cell 11 and the second battery cell 12 are used to carry different currents respectively, which is beneficial to improving the applicability of the conductive bar.

[0046] Embodiment 4: Embodiment 4 of the present application discloses a production process of a charging pile conductive bar, which is used to produce the charging pile conductive bar described in Embodiment 3, and includes the following steps: S1 , forming a first battery cell 11 and a second battery cell 12 .

[0047] S2. First, two first liquid cooling grooves 111 are formed by rolling on one side of the first battery cell 11, and two second liquid cooling grooves 121 are formed by rolling on one side of the second battery cell 12. Then, the first battery cell 11 and the second battery cell 12 are respectively inserted into the mold of the extruder, and the first inner insulating layer 3 and the second inner insulating layer 5 are respectively formed on the outer side of the first battery cell 11 and the outer side of the second battery cell 12 by the extruder. Finally, the first shielding layer 4 and the second shielding layer 6 are respectively wound on the outer side of the first inner insulating layer 3 and the second inner insulating layer 5. Reference Figure 5 The first liquid cooling groove 111 and the second liquid cooling groove 121 are formed by rolling the grooved roller 8. The grooved roller 8 is provided with a grooved protrusion 81, and the grooved protrusion 81 is used for rolling the first liquid cooling groove 111 or the second liquid cooling groove 121. There are two grooved protrusions 81, and the two grooved protrusions 81 are distributed along the axis direction of the grooved roller 8.

[0048] S3, the first battery core 11 and the second battery core 12 are connected and fixed to each other, and a plurality of first liquid cooling grooves 111 are respectively connected to the second liquid cooling grooves 121 to form a plurality of battery core liquid cooling holes 101.

[0049] Specifically, S3 includes the following steps: S31, disposing two liquid cooling tubes 7 between the first battery core 11 and the second battery core 12, and making the two liquid cooling tubes 7 correspond to each first liquid cooling groove 111 and the second liquid cooling groove 121, so that the two liquid cooling tubes 7 are subsequently fixedly disposed in each battery core liquid cooling hole 101.

[0050] S32, the first battery cell 11, the second battery cell 12 and the two liquid cooling tubes 7 are all passed through the mold of the extruder, and the outer insulating layer 2 is formed by the extruder, and the liquid cooling tube 7 is laid in the battery cell liquid cooling hole 101 by the outer insulating layer 2, so that the first battery cell 11, the second battery cell 12 and the two liquid cooling tubes 7 are formed into a whole.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A charging pile conductive bar, characterized in that: It comprises a conductive battery cell (1), wherein a plurality of battery cell liquid cooling holes (101) are provided inside the conductive battery cell (1), the plurality of battery cell liquid cooling holes (101) are distributed along the width direction of the conductive battery cell (1), and the plurality of battery cell liquid cooling holes (101) are all arranged to penetrate along the length direction of the conductive battery cell (1).

2. The conductive bar of a charging pile according to claim 1, characterized in that: The conductive battery cell (1) comprises a first battery cell (11) and a second battery cell (12); the first battery cell (11) is provided with a plurality of first liquid cooling grooves (111); the second battery cell (12) is provided with a plurality of second liquid cooling grooves (121); the plurality of first liquid cooling grooves (111) are respectively arranged corresponding to the second liquid cooling grooves (121); and the battery cell liquid cooling hole (101) is formed by connecting the first liquid cooling grooves (111) with the second liquid cooling grooves (121).

3. The conductive bar of a charging pile according to claim 2, characterized in that: The corners of the inner wall of the first liquid cooling tank (111), the corners of the inner wall of the second liquid cooling tank (121), the corners of the first battery cell (11) close to the second battery cell (12), and / or the corners of the second battery cell (12) close to the first battery cell (11) are chamfered.

4. The conductive bar of a charging pile according to claim 2, characterized in that: The charging pile conductive bar further comprises a first inner insulating layer (3) and a second inner insulating layer (5), wherein the first inner insulating layer (3) is laid on the first battery core (11), and the second inner insulating layer (5) is laid on the second battery core (12), and the first battery core (11) and the second battery core (12) are insulated from each other.

5. The conductive bar of a charging pile according to claim 4, characterized in that: The charging pile conductive bar further comprises a first shielding layer (4) and a second shielding layer (6), wherein the first shielding layer (4) is laid on the first inner insulating layer (3), and the second shielding layer (6) is laid on the second inner insulating layer (5).

6. The conductive bar of a charging pile according to claim 4, characterized in that: A liquid cooling pipe (7) is provided inside the battery core liquid cooling hole (101), and the liquid cooling pipe (7) has insulation properties.

7. The conductive bar of a charging pile according to claim 1, characterized in that: The charging pile conductive bar also includes an outer insulating layer (2), and the outer insulating layer (2) is applied on the conductive battery core (1).

8. A production process for a charging pile conductive bar, used to produce the charging pile conductive bar according to claim 1, characterized in that: The following steps are involved: S1, forming a first battery cell (11) and a second battery cell (12); S2, opening a plurality of first liquid cooling grooves (111) on one side of the first battery cell (11), and opening a plurality of second liquid cooling grooves (121) on one side of the second battery cell (12); S3, the first battery cell (11) and the second battery cell (12) are connected and fixed to each other, and a plurality of the first liquid cooling grooves (111) are respectively connected to the second liquid cooling grooves (121) to form a plurality of battery cell liquid cooling holes (101).

9. The production process of the charging pile conductive bar according to claim 8, characterized in that: In the step S2, the first liquid cooling groove (111) and the second liquid cooling groove (121) are formed by rolling with a slotted roller (8), wherein the slotted roller (8) is provided with a slotted protrusion (81), and the slotted protrusion (81) is used to form the first liquid cooling groove (111) or the second liquid cooling groove (121).

10. The production process of the charging pile conductive bar according to claim 8, characterized in that: The S3 step includes the following steps: S31, arranging a plurality of liquid cooling tubes (7) between the first battery core (11) and the second battery core (12), and making the plurality of liquid cooling tubes (7) correspond to between each first liquid cooling tank (111) and the second liquid cooling tank (121); S32, allowing the first battery cell (11), the second battery cell (12) and each liquid cooling tube (7) to pass through an extruder, and forming an outer insulating layer (2) through the extruder, and allowing the liquid cooling tube (7) to be laid by the outer insulating layer (2) in the battery cell liquid cooling hole (101).

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