Welding cooling device

Abstract

The utility model relates to a welding cooling device. The welding cooling device comprises a positioning clamp and a heat dissipation piece. The positioning clamp is provided with a bearing cavity, and the cavity wall of the bearing cavity is provided with a through hole communicating with the bearing cavity. A heat dissipation block is arranged on the side, close to the positioning clamp, of the heat dissipation piece in a protruding mode, and when the heat dissipation piece is matched with the positioning clamp, the heat dissipation block is opposite to the through hole. A cooling liquid channel is further formed in the heat dissipation piece and used for circulation of cooling liquid. When the welding cooling device is used for welding the top cover and the connecting piece of the battery, the pole mounted on the top cover is inserted into the through hole, and the pole abuts against the heat dissipation block. Therefore, when the battery is welded and prepared, the temperature of the pole can be reduced through the heat conduction effect of the heat dissipation block, and the temperature of the heat dissipation piece is reduced through the cooling effect of the cooling liquid, so that the temperature of the pole is lower, the pole is not easy to crack due to overheating in the welding process, the number of defective products of the finally produced battery is less, and the production efficiency is improved. And the yield is high.

Description

Technical Field

[0001] The present application relates to the technical field of battery preparation, and in particular to a welding cooling device. Background Art

[0002] The top cover of lithium-ion batteries is prone to generate a large amount of heat instantly during the laser welding process of the connecting piece, which causes the poles on the top cover to be overheated and cracked, resulting in a large number of defective batteries and a low yield rate. Summary of the invention

[0003] Based on this, it is necessary to provide a welding cooling device to address the problem that when the top cover and the connecting plate of the existing lithium-ion battery are welded, the pole is prone to cracking, which leads to a large number of defective batteries and a low yield rate in the final production.

[0004] A welding cooling device comprises a positioning fixture and a heat sink. The positioning fixture is configured with a bearing cavity, and the cavity wall of the bearing cavity is provided with a through hole connected to the bearing cavity; a heat sink is convexly provided with a heat sink block on one side of the heat sink close to the positioning fixture, and when the heat sink is matched with the positioning fixture, the heat sink block is opposite to the through hole; a coolant channel is also configured on the heat sink, and the coolant channel is used to circulate coolant.

[0005] When the top cover and the connecting piece of the battery are welded by the welding cooling device, the pole installed on the top cover is first inserted into the through hole, and the pole is abutted against the heat sink. In this way, when the battery is welded, the temperature of the pole can be reduced by the heat conduction of the heat sink, and the temperature of the heat sink can be reduced by the cooling effect of the coolant, so that the temperature of the pole is low, and the pole is not prone to overheating and cracking during the welding process. The final produced battery has fewer defective products and a higher quality rate.

[0006] In one embodiment, the through hole is disposed on the bottom wall of the bearing cavity.

[0007] By arranging the through hole on the bottom wall of the bearing cavity, it is more convenient to insert the pole mounted on the top cover into the through hole.

[0008] In one embodiment, the cross-sectional shape of the through hole along its axial direction is adapted to the cross-sectional shape of the pole.

[0009] By matching the cross-sectional shape of the through hole along its axial direction with the cross-sectional shape of the pole, the pole is not easily swung relative to the side wall of the through hole when inserted into the through hole, thereby making the position of the top cover relative to the positioning fixture maintain a high accuracy, and ultimately making the welding position accuracy of the top cover and the connecting piece high, and the quality rate of the prepared battery high.

[0010] In one of the embodiments, the shape of the heat sink block matches the shape of the through hole.

[0011] By matching the shape of the heat sink block with the shape of the through hole, the heat sink block is easily inserted into the through hole, and the axial cross-section of the heat sink block inserted into the through hole is enlarged, and the abutment surface between the heat sink block and the pole is larger, thereby achieving a better heat dissipation effect on the pole.

[0012] In one of the embodiments, the number of the heat dissipation blocks is at least two, and at least two of the heat dissipation blocks are arranged at intervals.

[0013] By providing at least two heat dissipation blocks, when welding the top cover and the connecting plate of the battery, different heat dissipation blocks can be selected to be opposite to the through holes, so that different heat dissipation blocks can be used alternately, thereby reducing the temperature of the heat dissipation blocks and achieving a better heat dissipation effect on the pole.

[0014] In one of the embodiments, the heat sink is configured with a coolant inlet and a coolant outlet; the coolant inlet and the coolant outlet are connected to form the coolant channel.

[0015] A coolant inlet and a coolant outlet are constructed on the heat sink, and the coolant inlet and the coolant outlet are connected to form a coolant channel, so that the coolant can flow in the cooling channel in real time to dissipate heat from the heat sink, thereby lowering the temperature of the heat sink block.

[0016] In one embodiment, the coolant inlet and the coolant outlet are arranged opposite to each other.

[0017] By arranging the coolant inlet and the coolant outlet opposite to each other, the connecting ports at both ends of the coolant channel are opposite to each other, so that the arrangement of the coolant pipeline is more convenient, and the length of the coolant channel is longer, which has a better heat dissipation effect on the heat sink.

[0018] In one of the embodiments, the circumferential side wall of the heat sink is recessed inward to form a clamping groove.

[0019] By forming a snap-fit ​​groove on the circumferential side wall of the heat sink, the surface area of ​​the circumferential side wall of the heat sink is larger, and the area for heat exchange with the external environment is also larger, making it easier to perform heat dissipation operations on the heat sink. At the same time, by providing the snap-fit ​​groove, the radial cross-sectional area of ​​the coolant channel is smaller, reducing the amount of coolant used; and the coolant channel can also be closer to the outside air, facilitating the heat dissipation of the coolant in the coolant channel.

[0020] In one embodiment, the number of the heat dissipation blocks is at least two, and at least two of the heat dissipation blocks are arranged at intervals;

[0021] The clamping groove is arranged between at least two of the heat dissipation blocks.

[0022] By arranging the clamping groove between at least two heat sinks, the shape of the heat sink itself is not affected and the heat dissipation of the heat sink can be facilitated.

[0023] In one of the embodiments, the welding cooling device further includes a driving member;

[0024] The driving member is used to drive the heat sink to move closer to or farther from the positioning fixture so that the heat sink cooperates with the positioning fixture.

[0025] By providing a driving member, the heat sink is driven to move closer to or farther from the positioning fixture, so that the heat sink can extend into the through hole, abut against the pole, and perform heat dissipation operation on the pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An exploded schematic diagram of a welding cooling device and a top cover provided in some embodiments of the present application.

[0027] Figure 2 for Figure 1 Left side view of the welding cooling unit and top cover shown.

[0028] Figure 3 for Figure 1 A front view of the welded cooling device and top cover is shown.

[0029] Figure 4 for Figure 1 Schematic diagram of the heat sink in the welding cooling device shown.

[0030] Figure 5 for Figure 4 A top view of the heat sink is shown.

[0031] Figure 6 for Figure 5 A cross-sectional view at AA is shown.

[0032] Figure 7 for Figure 1 Schematic diagram of the positioning fixture in the welding cooling device shown.

[0033] 100 - positioning fixture; 110 - bearing cavity; 111 - through hole; 200 - heat sink; 210 - heat sink block; 220 - coolant channel; 221 - coolant inlet; 222 - coolant outlet; 230 - snap-on groove; 300 - top cover; 310 - pole. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0040] See also Figure 1-Figure 3 , Figure 1 An exploded schematic diagram of a welding cooling device and a top cover 300 provided in some embodiments of the present application is shown. Figure 2 Shows Figure 1 A left side view of the welding cooling device and the top cover 300 is shown. Figure 3 Shows Figure 1 The front view of the welding cooling device and the top cover 300 shown. The welding cooling device provided by one embodiment of the present application includes a positioning fixture 100 and a heat sink 200. The positioning fixture 100 is configured with a bearing cavity 110, and the cavity wall of the bearing cavity 110 is provided with a through hole 111 connected to the bearing cavity 110; a heat sink 210 is convexly provided on one side of the heat sink 200 close to the positioning fixture 100, and when the heat sink 200 is matched with the positioning fixture 100, the heat sink 210 is opposite to the through hole 111; a coolant channel 220 is also configured on the heat sink 200, and the coolant channel 220 is used to circulate the coolant.

[0041] When the top cover 300 and the connecting piece of the battery are welded by the welding cooling device provided in the embodiment of the present application, the pole 310 installed on the top cover 300 is first inserted into the through hole 111, and the pole 310 is abutted against the heat sink 210. In this way, when the battery is welded, the temperature of the pole 310 can be reduced by the heat conduction of the heat sink 210, and the temperature of the heat sink 200 can be reduced by the cooling effect of the coolant, thereby making the temperature of the pole 310 lower, and the pole 310 is not prone to overheating and cracking during the welding process, and the final produced battery has fewer defective products and a higher yield rate.

[0042] It should be noted that before welding the top cover 300 of the battery to the connecting sheet, the bare battery cell and the top cover 300 of the battery need to be ultrasonically welded first, so that the bare battery cell and the top cover 300 become a whole battery cell.

[0043] When the bare cell is fixedly connected to the top cover 300 and positioned relative to the positioning fixture 100 based on the outer dimensions of the top cover 300, the positioning fixture 100 is transferred to the welding station. At this time, a moving part drives the heat sink 200 to move closer to the positioning fixture 100 so that the heat sink 210 can abut against the pole 310, and the coolant circulates in the coolant channel 220 and is shared with the collimating galvanometer, so that the heat sink 210 receives the heat transfer from the pole 310 during the welding process. The coolant consumes heat to ensure the effectiveness of the heat transfer of the heat sink 210 each time. After the welding is completed, the moving part drives the heat sink 200 to move away from the positioning fixture 100, and the positioning fixture 100 circulates.

[0044] In some embodiments, the heat sink 210 is a heat sink copper block, and the heat dissipation of the pole 310 is achieved through the good heat dissipation performance of the copper block.

[0045] It should be noted that the heat sink 200 can be formed integrally with the heat sink block 210, or the heat sink block 210 can be embedded in the heat sink 200, and there is no special limitation on this. The material of the heat sink 200 can be the same as that of the heat sink block 210, or different.

[0046] In some embodiments, the cooling fluid is cooling water.

[0047] See also Figure 4-Figure 7 , Figure 4 Shows Figure 1 FIG. 2 is a schematic diagram of a heat sink 200 in a welding cooling device. Figure 5 Shows Figure 4 A top view of the heat sink 200 is shown. Figure 6 Shows Figure 5 A cross-sectional view at AA is shown. Figure 7 Shows Figure 1 A schematic diagram of a positioning fixture 100 in a welding cooling device is shown.

[0048] The structure of the welding cooling device is described in detail below.

[0049] See also Figure 1 and Figure 7 In some embodiments, the through hole 111 is disposed on the bottom wall of the bearing cavity 110. By disposing the through hole 111 on the bottom wall of the bearing cavity 110, the pole 310 installed on the top cover 300 can be inserted into the through hole 111 more conveniently.

[0050] See also Figure 2 Combined with Figure 7 In some embodiments, the cross-sectional shape of the through hole 111 along its axial direction is adapted to the cross-sectional shape of the battery cell pole 310. By adapting the cross-sectional area shape of the through hole 111 along its axial direction to the cross-sectional area shape of the pole 310, the pole 310 is not easy to swing relative to the side wall of the through hole 111 when inserted into the through hole 111, thereby making the position of the top cover 300 relative to the positioning fixture 100 maintain a high accuracy, and finally making the welding position accuracy of the top cover 300 and the connecting piece high, and the quality rate of the prepared battery is high.

[0051] In some embodiments, the cross-sectional shape of the through hole 111 along the axial direction thereof is an ellipse.

[0052] See also Figure 1 , Figure 4 and Figure 5 Combined with Figure 7 In some embodiments, the shape of the heat sink 210 is adapted to the shape of the through hole 111. By adapting the shape of the heat sink 210 to the shape of the through hole 111, the heat sink 210 is easily inserted into the through hole 111, and the axial cross-section of the heat sink 210 inserted into the through hole 111 is increased, and the contact surface between the heat sink 210 and the pole 310 is increased, thereby achieving a better heat dissipation effect on the pole 310.

[0053] See also Figure 1 and Figure 4-Figure 6 In some embodiments, the number of the heat sink blocks 210 is at least two, and at least two heat sink blocks 210 are arranged at intervals. By providing at least two heat sink blocks 210, when welding the top cover 300 of the battery and the connecting sheet, different heat sink blocks 210 can be selected to be opposite to the through hole 111, so that different heat sink blocks 210 can be used alternately, the temperature of the heat sink blocks 210 is reduced, and the heat dissipation effect of the pole 310 is better.

[0054] In one embodiment, the number of heat sink blocks 210 is two, which is the same as the number of poles 310. During the welding process, each heat sink block 210 abuts against one pole 310. In another embodiment, the number of heat sink blocks 210 is three, and during the welding process, two heat sink blocks 210 are selected to abut against one pole 310 respectively.

[0055] See also Figure 6 In some embodiments, the heat sink 200 is configured with a coolant inlet 221 and a coolant outlet 222; the coolant inlet 221 and the coolant outlet 222 are connected to form a coolant channel 220. By configuring the coolant inlet 221 and the coolant outlet 222 on the heat sink 200, and the coolant inlet 221 and the coolant outlet 222 are connected to form the coolant channel 220, the coolant can flow in the cooling channel in real time to dissipate the heat of the heat sink 200, thereby lowering the temperature of the heat sink 210.

[0056] See also Figure 6 In some embodiments, the coolant inlet 221 and the coolant outlet 222 are arranged opposite to each other. By arranging the coolant inlet 221 and the coolant outlet 222 opposite to each other, the connecting ports at both ends of the coolant channel 220 are opposite to each other, so that the arrangement of the coolant pipeline is more convenient, and the length of the coolant channel 220 is longer, which has a better heat dissipation effect on the heat sink 200.

[0057] See also Figure 4 and Figure 5 In some embodiments, the circumferential side wall of the heat sink 200 is recessed inward to form a snap-on groove 230. By recessing the circumferential side wall of the heat sink 200 inward to form the snap-on groove 230, the surface area of ​​the circumferential side wall of the heat sink 200 is larger, and the area for heat exchange with the external environment is also larger, making it easier to perform heat dissipation operations on the heat sink 200. At the same time, by providing the snap-on groove 230, the radial cross-sectional area of ​​the coolant channel 220 is reduced, reducing the amount of coolant used; and the coolant channel 220 can also be closer to the outside air, facilitating the heat dissipation of the coolant in the coolant channel 220.

[0058] See also Figure 4 and Figure 5 In some embodiments, the number of the heat sink 210 is at least two, and the at least two heat sinks 210 are arranged at intervals; the clamping groove 230 is arranged between the at least two heat sinks 210. By arranging the clamping groove 230 between the at least two heat sinks 210, the shape of the heat sink 210 itself is not affected, and the heat dissipation of the heat sink 210 can be facilitated.

[0059] In some embodiments, the welding cooling device further includes a driving member (not shown in the figure); the driving member is used to drive the heat sink 200 to move closer to or farther from the positioning fixture 100, so that the heat sink 200 cooperates with the positioning fixture 100. By providing the driving member, the heat sink 200 is driven to move closer to or farther from the positioning fixture 100, so that the heat sink 210 can extend into the through hole 111 and abut against the pole 310 to perform heat dissipation operation on the pole 310. In one specific embodiment, the driving member is a cylinder, and the heat sink 200 is driven by the cylinder to move closer to or farther from the positioning fixture 100.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A welding cooling device, characterized in that: The welding cooling device comprises: A positioning fixture (100), the positioning fixture (100) being configured with a bearing cavity (110), the cavity wall of the bearing cavity (110) being provided with a through hole (111) connected to the bearing cavity (110); A heat sink (200), wherein a heat sink block (210) is protrudingly provided on one side of the heat sink (200) close to the positioning fixture (100); when the heat sink (200) is matched with the positioning fixture (100), the heat sink block (210) is opposite to the through hole (111); and a coolant channel (220) is also constructed on the heat sink (200), and the coolant channel (220) is used to circulate coolant.

2. The welding cooling device according to claim 1, characterized in that: The through hole (111) is arranged on the bottom wall of the bearing cavity (110).

3. The welding cooling device according to claim 1, characterized in that: The cross-sectional shape of the through hole (111) along its axial direction is adapted to the cross-sectional shape of the pole (310).

4. The welding cooling device according to claim 1, characterized in that: The shape of the heat dissipation block (210) is compatible with the shape of the through hole (111).

5. The welding cooling device according to claim 1, characterized in that: The number of the heat dissipation blocks (210) is at least two, and at least two of the heat dissipation blocks (210) are arranged at intervals.

6. The welding cooling device according to claim 1, characterized in that: The heat sink (200) is configured with a coolant inlet (221) and a coolant outlet (222); the coolant inlet (221) and the coolant outlet (222) are connected to form the coolant channel (220).

7. The welding cooling device according to claim 6, characterized in that: The cooling liquid inlet (221) and the cooling liquid outlet (222) are arranged opposite to each other.

8. The welding cooling device according to claim 1, characterized in that: The circumferential side wall of the heat sink (200) is recessed inwards to form a clamping groove (230).

9. The welding cooling device according to claim 8, characterized in that: The number of the heat dissipation blocks (210) is at least two, and at least two of the heat dissipation blocks (210) are arranged at intervals; The clamping groove (230) is arranged between at least two of the heat dissipation blocks (210).

10. The welding cooling device according to any one of claims 1 to 9, characterized in that: The welding cooling device also includes a driving member; The driving member is used to drive the heat sink (200) to move closer to or farther from the positioning fixture (100), so that the heat sink (200) cooperates with the positioning fixture (100).

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