Cooling structure for battery pack welding and welding equipment
By designing a cooling structure for battery pack welding in welding equipment, and circulating the cooling medium of the thermal conductor and the heat conduction channel, the problem of large deformation of the shell under the roller steel is solved, and the effective reduction of the temperature in the welding area and the passing of the single piece size is achieved.
Patent Information
- Application Number
- CN202421345321.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The shell under the rolling steel is deformed largely during welding, resulting in the problem of unqualified single-piece size.
A cooling structure for battery pack welding is designed, including a thermal conductor and a thermal conduction channel, which absorbs and takes away the heat generated during the welding process through the circulating flow of the cooling medium in the thermal conduction channel, and reduces the temperature of the welding area.
It effectively reduces the temperature in the welding area, reduces the temperature difference between parts, avoids welding deformation, and ensures the qualified size of the single piece.
Smart Images
Figure CN222643571U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery production technology, and in particular to a cooling structure and welding equipment for battery pack welding. Background Art
[0002] At present, new energy vehicles are becoming more and more popular, and different types of battery pack lower shells are emerging.
[0003] Aluminum profile lower shells are common in the market now. In order to reduce costs and increase efficiency, rolled steel lower shells are used. However, compared with aluminum profile lower shells, rolled steel lower shells have greater deformation during welding. After welding, due to the deformation caused by welding, the single size of the rolled steel lower shell is likely to be unqualified. Utility Model Content
[0004] The present application provides a cooling structure and welding equipment for battery pack welding, which are used to solve the problem in the prior art that the rolled steel lower shell is greatly deformed during the welding process, resulting in unqualified single-piece dimensions of the rolled steel lower shell.
[0005] On the one hand, the present application provides a cooling structure for welding a battery pack, comprising:
[0006] A heat conductor, wherein a heat conduction channel is provided in the heat conductor, the heat conduction channel has a first port and a second port, and the first port is connected to the second port;
[0007] A cooling medium is used to flow from the first port to the second port.
[0008] In a possible design, the heat conductor is a columnar structure having a first end face and a second end face that are oppositely disposed, and the first port and the second port are respectively opened on the first end face of the heat conductor.
[0009] In a possible design, the heat conduction channel is opened at a position of the heat conductor close to the outer surface.
[0010] In a possible design, the heat conduction channel is a U-shaped channel, and two ends of the U-shaped channel are respectively a first port and a second port.
[0011] In a possible design, the heat conducting channel is a spiral channel.
[0012] In one possible design, the heat conduction path includes:
[0013] A spiral section, one end of the spiral section being a first port;
[0014] A straight line segment, one end of the straight line segment is connected to the other end of the spiral segment, and the other end of the straight line segment is a second port.
[0015] In a possible design, the spiral segment is opened at a position of the heat conductor close to the outer surface, and the straight segment is opened at a central position of the heat conductor, and the straight segment extends along the central axis of the heat conductor.
[0016] In a possible design, the cooling structure for battery pack welding also includes:
[0017] a liquid inlet pipe, wherein an outlet of the liquid inlet pipe is connected to the first port;
[0018] The liquid outlet pipe has an inlet connected to the second port.
[0019] In a possible design, the cooling structure for battery pack welding further includes a cooling device, wherein the outlet of the cooling device is connected to the inlet of the liquid inlet pipe, and the inlet of the cooling device is connected to the outlet of the liquid outlet pipe.
[0020] On the other hand, the present application also provides a welding device, comprising the cooling structure for battery pack welding as described above.
[0021] The beneficial effects of this application are as follows:
[0022] The cooling structure for battery pack welding of the present application utilizes a heat conductor to transfer heat, and can timely transfer the heat at the weld bead when the central sleeve and the lower shell cross beam are welded to the heat conductor. A heat conduction channel is provided in the heat conductor, and the heat conduction channel has a first port and a second port, and the first port is connected to the second port, so that the cooling medium flows from the first port to the second port, thereby timely taking away the heat of the heat conductor during the flow of the cooling medium in the heat conduction channel. The cooling medium continuously circulates between the heat conduction channel between the first port and the second port, and takes away the heat at the weld bead when the central sleeve and the lower shell cross beam are welded, thereby effectively reducing the temperature of the central sleeve and the lower shell cross beam at the weld bead when the central sleeve and the lower shell cross beam are welded, so as to reduce the temperature difference between the central sleeve and the lower shell cross beam at the weld bead and the temperature of the central sleeve and the lower shell cross beam at the non-weld bead position, and avoid the central sleeve from shrinking inward, which can effectively improve the welding deformation caused by the temperature difference between the parts during the welding process of the lower shell.
[0023] The welding equipment provided in the present application includes the cooling structure for battery pack welding in the present application, and therefore also includes all the above-mentioned advantages of the cooling structure for battery pack welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0025] Figure 1 A schematic structural diagram of a cooling structure for welding a battery pack provided in one embodiment of the present application;
[0026] Figure 2 Another schematic diagram of a cooling structure for welding a battery pack provided in one embodiment of the present application;
[0027] Figure 3 A cooling structure for welding a battery pack provided in one embodiment of the present application is provided along Figure 2 Sectional view of AA in the middle;
[0028] Figure 4 An internal structural diagram of a cooling structure for welding a battery pack provided in another embodiment of the present application.
[0029] Reference numerals:
[0030] 100, heat conductor; 110, heat conduction channel; 111, first port; 112, second port; 120, first end face; 130, second end face; 141, spiral segment; 142, straight segment; 200, cooling medium; 310, liquid inlet pipe; 320, liquid outlet pipe; 400, central sleeve; 500, lower shell crossbeam. DETAILED DESCRIPTION
[0031] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0032] When the central sleeve is welded to the lower shell cross beam, the central sleeve is placed on the lower shell cross beam and welded to the lower shell cross beam by CMT welding. During the welding process, a weld bead is generated at the position where the outer wall of the central sleeve contacts the lower shell cross beam. The position of the weld bead is Figure 3 The area shown by B in the middle has extremely high heat. There is a temperature difference between the weld and other positions, which causes the central sleeve to shrink inward at this position, resulting in the size of the central sleeve being unqualified, affecting the assembly of the battery.
[0033] Combine the following Figure 1-Figure 4, describes the cooling structure for battery pack welding provided in the embodiments of the present application. Specifically, the cooling structure for battery pack welding includes a heat conductor 100 and a cooling medium 200. Among them, a heat-conducting channel 110 is arranged in the heat conductor 100, and the heat-conducting channel 110 has a first port 111 and a second port 112, and the first port 111 is connected to the second port 112; the cooling medium 200 is used to flow from the first port 111 to the second port 112. In some of the specific embodiments, the heat-conducting channel 110 can be a heat-conducting pipe embedded in the heat conductor 100, and the heat-conducting pipe is made of a heat-conducting material; the heat-conducting channel 110 can also be a through hole opened in the heat conductor 100, and the heat conductor 100 is made of a heat-conducting material, for example, the heat conductor 100 is a copper block. The cooling medium 200 is a coolant. The coolant with a lower temperature enters the heat conducting channel 110 from the first port 111, flows in the heat conducting channel 110, and flows out of the coolant with a higher temperature from the second port 112. During the flow of the coolant in the heat conducting channel 110, heat exchange occurs. The coolant absorbs heat from the heat conductor 100, the temperature of the coolant increases, and the temperature of the heat conductor 100 decreases.
[0034] When the central sleeve 400 and the lower shell cross beam 500 are welded, a weld bead is generated at the contact position between the central sleeve 400 and the lower shell cross beam 500. Figure 3 The area indicated by B in the figure has extremely high heat. The heat conductor 100 absorbs the heat of the central sleeve 400 and the lower shell cross beam 500 near the weld, the temperature of the heat conductor 100 increases, and the temperature of the central sleeve 400 and the lower shell cross beam 500 near the weld decreases; when the cooling medium 200 flows in the heat conduction channel 110, the cooling medium 200 absorbs the heat of the heat conductor 100, the temperature of the cooling medium 200 increases, and the temperature of the heat conductor 100 decreases; thus, the temperature of the heat conductor 100 is always maintained at a low state, so that the heat of the central sleeve 400 and the lower shell cross beam 500 near the weld can be continuously absorbed, so as to effectively reduce the temperature of the central sleeve 400 and the lower shell cross beam 500 near the weld.
[0035] By using the technical solution of the above embodiment, heat is transferred through the heat conductor 100, so that the heat at the weld when the central sleeve 400 and the lower shell cross beam 500 are welded can be transferred to the heat conductor 100 in time. By opening a heat conduction channel 110 in the heat conductor 100, the cooling medium 200 flows from the first port 111 to the second port 112, and the heat of the heat conductor 100 is taken away in time during the process of the cooling medium 200 flowing in the heat conduction channel 110. The cooling medium 200 is continuously circulated between the heat conduction channel 110 between the first port 111 and the second port 112 to take away the heat at the weld bead when the central sleeve 400 and the lower shell cross beam 500 are welded, thereby effectively reducing the temperature of the central sleeve 400 and the lower shell cross beam 500 at the weld bead when the central sleeve 400 and the lower shell cross beam 500 are welded, thereby reducing the temperature difference between the central sleeve 400 and the lower shell cross beam 500 at the weld bead and the temperature of the central sleeve 400 and the lower shell cross beam 500 at the non-weld bead position, avoiding the central sleeve 400 from shrinking inward, and effectively improving the welding deformation caused by the temperature difference between the parts during the lower shell welding process.
[0036] Reference Figure 2 , Figure 3 As shown, in some embodiments of the present application, the heat conductor 100 is a columnar structure, and the columnar structure has a first end face 120 and a second end face 130 that are arranged opposite to each other, and the first port 111 and the second port 112 are respectively opened on the first end face 120 of the heat conductor 100. It should be noted that, generally, the central sleeve 400 is in the shape of a column, and a columnar groove is provided inside the central sleeve 400. When the central sleeve 400 and the lower shell cross beam 500 are welded, the heat conductor 100 needs to be placed in the columnar groove of the central sleeve 400. By designing the heat conductor 100 as a columnar structure, the outer wall of the heat conductor 100 can be fitted with the inner wall of the central sleeve 400, so as to improve the heat transfer efficiency and take away the heat of the central sleeve 400 at the weld in time. The heat conductor 100 has a first end face 120 and a second end face 130 which are arranged opposite to each other. During the welding operation, the heat conductor 100 is moved downward along the inner wall of the central sleeve 400 until the second end face 130 contacts the bottom wall of the central sleeve 400, thereby limiting the heat conductor 100 in the cylindrical groove of the central sleeve 400. In some specific embodiments, the height of the heat conductor 100 is equal to the depth of the cylindrical groove of the central sleeve 400, so that when the second end face 130 contacts the bottom wall of the central sleeve 400, the first end face 120 can be exposed at the upper end of the central sleeve 400, thereby facilitating the first port 111 and the second port 112 located at the first end face 120 of the heat conductor 100 to be connected to the cooling device respectively.
[0037] Reference Figure 3As shown, in some embodiments of the present application, the heat conduction channel 110 is opened at a position close to the outer surface of the heat conductor 100. Since the heat conductor 100 is located in the cylindrical groove inside the central sleeve 400 during welding, by opening the heat conduction channel 110 at a position close to the outer surface of the heat conductor 100, it is equivalent to being closer to the weld bead on the periphery of the central sleeve 400, thereby improving the heat transfer efficiency between the central sleeve 400, the heat conductor 100, and the cooling medium 200, which is conducive to maintaining the temperature of the components near the weld bead and reducing the temperature difference between the components around the weld bead and the components at other positions.
[0038] Reference Figure 3 As shown, in some embodiments of the present application, the heat conduction channel 110 is a U-shaped channel, and the two ends of the U-shaped channel are respectively a first port 111 and a second port 112. In some specific embodiments, the two ends of the U-shaped channel are opened upward on the first end surface 120, and the bottom of the U-shaped channel runs through the entire heat conductor 100 near the lower part, and the cooling medium 200 flows through the heat conductor 100 along the U-shaped channel in the heat conductor 100. By designing it as a U-shaped channel, the cooling medium 200 can flow out from the upper end surface of the heat conductor 100 after crossing the heat conductor 100, so as to facilitate the first port 111 and the second port 112 corresponding to the upper end surface of the heat conductor 100 to be connected with the cooling device respectively. In some specific embodiments, the heat conducting channel 110 includes at least one U-shaped channel. For example, the heat conducting channel 110 may include two, three, or four U-shaped channels, etc. All the U-shaped channels are arranged side by side, and both ends of each U-shaped channel are opened on the first end surface 120. By increasing the number of heat conducting channels 110, the heat transfer efficiency between the central sleeve 400, the heat conductor 100, and the cooling medium 200 can be improved, which is beneficial to maintaining the temperature of the components near the weld and reducing the temperature difference between the components around the weld and the components at other positions.
[0039] Reference Figure 4 As shown, in some embodiments of the present application, the heat conduction channel 110 is a spiral channel. By designing the heat conduction channel 110 as a spiral channel, the spiral channel can increase the contact area between the cooling medium 200 and the heat conductor 100, thereby improving the heat transfer efficiency between the heat conductor 100 and the cooling medium 200.
[0040] Reference Figure 4As shown, in some embodiments of the present application, the heat conductive channel 110 includes a spiral segment 141 and a straight segment 142, wherein one end of the spiral segment 141 is a first port 111, one end of the straight segment 142 is connected to the other end of the spiral segment 141, and the other end of the straight segment 142 is a second port 112. The cooling medium 200 with a lower temperature first enters the spiral section 141 from the first port 111. The low-temperature cooling medium 200 has a stronger heat exchange capacity. The cooling medium 200 with a stronger heat exchange capacity flows in the spiral section 141 to increase the contact area with the heat conductor 100 to maintain a higher heat exchange efficiency. After the cooling medium 200 exchanges heat with the heat conductor 100 for a period of time, the temperature of the cooling medium 200 gradually increases, while the heat exchange capacity of the cooling medium 200 with an increased temperature is significantly reduced. Therefore, by setting a straight section 142, the cooling medium 200 with an increased temperature can be quickly discharged from the straight section 142 to the second port 112 in time to accelerate the circulation of the low-temperature cooling medium 200 and improve the heat transfer efficiency between the central sleeve 400, the heat conductor 100, and the cooling medium 200.
[0041] Specifically, the spiral segment 141 is opened at a position close to the outer surface of the heat conductor 100, and the spiral segment 141 spirals around the central axis of the heat conductor 100. The straight segment 142 is opened at the central position of the heat conductor 100, and the straight segment 142 extends along the central axis of the heat conductor 100. By making the spiral segment 141 close to the outer wall of the heat conductor 100, the distance between the cooling medium 200 in the spiral segment 141 and the central sleeve 400 is shortened, thereby improving the heat transfer efficiency between the central sleeve 400, the heat conductor 100, and the cooling medium 200; by making the straight segment 142 opened at the central position of the heat conductor 100, the cooling medium 200 in the straight segment 142 avoids the spiral segment 141.
[0042] Reference Figure 3 As shown, in some embodiments of the present application, the cooling structure for battery pack welding further includes a liquid inlet pipe 310 and a liquid outlet pipe 320, the outlet of the liquid inlet pipe 310 is connected to the first port 111; the inlet of the liquid outlet pipe 320 is connected to the second port 112. The liquid inlet pipe 310 and the liquid outlet pipe 320 can respectively connect the heat conduction channel 110 with the cooling device, so that the cooling medium 200 cooled by the cooling device flows into the heat conduction channel 110 through the liquid inlet pipe 310, and after the heat exchange is completed, it is returned to the cooling device through the liquid outlet pipe 320 to form a cycle.
[0043] In some embodiments, the cooling structure for battery pack welding further includes a cooling device, the outlet of the cooling device is connected to the inlet of the liquid inlet pipe 310, and the inlet of the cooling device is connected to the outlet of the liquid outlet pipe 320. The cooling device can continuously circulate the low-temperature cooling medium 200 to the heat conduction channel 110 during welding. Specifically, the cooling device can be a condenser.
[0044] The general working principle of the cooling structure for battery pack welding in this application is:
[0045] When the central sleeve 400 and the lower shell cross beam 500 are welded, the heat conductor 100 is placed in the cylindrical groove of the central sleeve 400. The heat conductor 100 absorbs the heat of the central sleeve 400 and the lower shell cross beam 500 at the weld bead, the temperature of the heat conductor 100 increases, and the temperature of the central sleeve 400 and the lower shell cross beam 500 near the weld bead decreases. When the cooling medium 200 flows in the heat conduction channel 110, the cooling medium 200 absorbs the heat of the heat conductor 100, and the temperature of the cooling medium 200 decreases. The temperature of the heat conductor 100 is increased, and the temperature of the heat conductor 100 is decreased; thereby, the temperature of the heat conductor 100 is always maintained at a low state, so that it can continuously absorb the heat of the central sleeve 400 and the lower shell cross beam 500 near the weld, thereby effectively reducing the temperature of the central sleeve 400 and the lower shell cross beam 500 at the weld position, reducing the temperature difference between the weld position and the non-weld position, and avoiding the central sleeve 400 from shrinking inward, which can effectively improve the welding deformation caused by the temperature difference between the parts during the welding process of the lower shell.
[0046] A welding device is also provided in an embodiment of the present application, comprising the cooling structure for welding a battery pack in the above embodiment.
[0047] It should be noted that the welding equipment includes a cooling structure for battery pack welding, which also includes all the above-mentioned advantages of the cooling structure for battery pack welding, which will not be repeated here.
[0048] In the description of the present application, it should be understood that 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; 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 specific circumstances.
[0051] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A cooling structure for battery pack welding, characterized in that: include: A heat conductor, wherein a heat conduction channel is disposed in the heat conductor, wherein the heat conduction channel has a first port and a second port, and the first port is connected to the second port; A cooling medium is configured to flow from the first port to the second port.
2. The cooling structure for battery pack welding according to claim 1, characterized in that: The heat conductor is in a columnar structure, and the columnar structure has a first end surface and a second end surface that are oppositely arranged, and the first port and the second port are respectively opened on the first end surface of the heat conductor.
3. The cooling structure for battery pack welding according to claim 2, characterized in that: The heat conduction channel is opened at a position of the heat conductor close to the outer surface.
4. The cooling structure for battery pack welding according to claim 2, characterized in that: The heat conduction channel is a U-shaped channel, and two ends of the U-shaped channel are the first port and the second port respectively.
5. The cooling structure for battery pack welding according to claim 2, characterized in that: The heat conduction channel is a spiral channel.
6. The cooling structure for battery pack welding according to claim 5, characterized in that: The heat conduction channel comprises: A spiral segment, one end of which is the first port; A straight line segment, one end of which is connected to the other end of the spiral segment, and the other end of the straight line segment is the second port.
7. The cooling structure for battery pack welding according to claim 6, characterized in that: The spiral section is opened at a position of the heat conductor close to the outer surface, the straight section is opened at the center of the heat conductor, and the straight section extends along the central axis of the heat conductor.
8. The cooling structure for welding a battery pack according to any one of claims 1 to 7, characterized in that: Also includes: a liquid inlet pipe, wherein an outlet of the liquid inlet pipe is in communication with the first port; A liquid outlet pipe, wherein the inlet of the liquid outlet pipe is communicated with the second port.
9. The cooling structure for battery pack welding according to claim 8, characterized in that: It also includes a cooling device, wherein the outlet of the cooling device is communicated with the inlet of the liquid inlet pipe, and the inlet of the cooling device is communicated with the outlet of the liquid outlet pipe.
10. A welding device, characterized in that: A cooling structure for welding a battery pack comprising the cooling structure described in any one of claims 1 to 9.