Cold plate structure, tray, battery pack, thermal management system and electric equipment

Abstract

The utility model relates to a cold plate structure, a tray, a battery pack, a thermal management system and electric equipment. The cold plate structure comprises a cold plate and a joint unit, the cold plate is provided with a first surface and a second surface which are opposite to each other, the first surface is suitable for cooling a battery cell group of the battery pack, a cooling medium runner is arranged in the cold plate, and a runner inlet and a runner outlet of the cooling medium runner are formed in the second surface; the connector unit is arranged on the second face and provided with an inflow runner and an outflow runner, one end of the inflow runner is connected with the runner inlet, and one end of the outflow runner is connected with the runner outlet. The flow channel inlet and the flow channel outlet of the cooling medium flow channel are formed in the second surface facing the outer side of the battery pack, and the joint unit is also fixed on the second surface, so that the joint unit does not need to penetrate through the first surface of the cold plate to reach the second surface of the cold plate; therefore, the air tightness failure of the inner side of the battery pack caused by communication between the inner side and the outer side of the cold plate due to welding defects or cracking of the joint unit is avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a cold plate structure, a tray, a battery pack, a thermal management system, and an electrical device. Background Art

[0002] At present, the main structural form of the battery pack cooler is the welding of an aluminum alloy temperature equalizing plate and a flow channel plate, and then the tray frame is welded to the cooler; the coolant joint extends into the tray frame and is welded to the tray frame so that the joint pipe is connected to the flow channel inlet and outlet of the cooler.

[0003] Currently, this technical solution has been maturely applied, but if there are welding defects in the welds or the welds crack during vehicle operation, the battery pack's airtightness will fail, resulting in a battery pack functional safety warning or even a thermal runaway accident. Utility Model Content

[0004] The purpose of the present disclosure is to provide a cold plate structure, a tray, a battery pack, a thermal management system and an electric device, wherein the cold plate structure can avoid the problem of failure of airtightness inside the battery pack due to welding defects or weld cracking of the coolant filling port.

[0005] In order to achieve the above-mentioned objectives, the first aspect of the present disclosure provides a cold plate structure, including a cold plate and a joint unit; the cold plate has a first surface and a second surface relative to each other, the first surface is suitable for cooling the battery cell group of the battery pack, the cold plate has a cooling medium flow channel inside, and the flow channel inlet and the flow channel outlet of the cooling medium flow channel are both arranged on the second surface; the joint unit is arranged on the second surface, the joint unit has an inlet flow channel and an outlet flow channel, one end of the inlet flow channel is connected to the flow channel inlet, and one end of the outlet flow channel is connected to the flow channel outlet.

[0006] Optionally, the cold plate includes a bottom wall and a side wall; the cooling medium flow channel is arranged in the bottom wall of the cold plate, and the flow channel inlet and the flow channel outlet are both located on the bottom wall; the bottom wall and the side walls are arranged to enclose a storage space for at least part of the battery cell group of the battery pack; the connector unit includes a first part located on the bottom wall and a second part located on the side wall, and the first part is connected to the second part.

[0007] Optionally, the joint unit also includes an inlet pipe and an outlet pipe; the first part includes the first joint, the first joint has a first inlet channel and a first outlet channel, the second part includes the second joint, the second joint has a second inlet channel and a second outlet channel; the inlet pipe connects the first inlet channel and the second inlet channel to construct the inlet channel, and the outlet pipe connects the first outflow channel and the second outflow channel to construct the outflow channel; the first inlet channel is connected to the channel inlet, and the first outflow channel is connected to the channel outlet.

[0008] Optionally, at least one of the first joint and the second joint is provided with a first positioning groove, and the end of the inlet pipe is inserted into the first positioning groove, and / or at least one of the first joint and the second joint is provided with a second positioning groove, and the end of the outlet pipe is inserted into the second positioning groove.

[0009] Optionally, the inlet pipe is fixed to the first joint and the second joint by welding, and / or the outlet pipe is fixed to the first joint and the second joint by welding.

[0010] Optionally, a first protrusion is provided on the first joint, the end of the first inlet channel passes through the end of the first protrusion, and the first protrusion is inserted into the flow channel inlet; and / or, a second protrusion is provided on the first joint, the end of the first outlet channel passes through the end of the second protrusion, and the second protrusion is inserted into the flow channel outlet.

[0011] Optionally, a stop portion is provided at one end of the second joint connected to the cold plate, a accommodating cavity is provided in the cold plate, a mounting hole connected to the accommodating cavity is provided on the second surface of the cold plate, the stop portion is located in the accommodating cavity and connected to the cold plate, and an end of the second joint away from the stop portion passes through the mounting hole and is located outside the cold plate.

[0012] Optionally, the first joint is fixed to the cold plate by brazing, and the second joint is fixed to the cold plate by brazing.

[0013] Optionally, the first part and the second part are integrally formed.

[0014] Optionally, the contour of the portion of the first part used to connect to the bottom wall is adapted to the contour of the corresponding portion on the bottom wall, and the contour of the portion of the second part used to connect to the side wall is adapted to the contour of the corresponding portion on the side wall.

[0015] Optionally, the cold plate includes a first plate body and a second plate body arranged opposite to each other, and the cooling medium flow channel can be defined between the first plate body and the second plate body; the first surface is located on a side of the first plate body away from the second plate body, and the second surface is located on a side of the second plate body away from the first plate body.

[0016] Optionally, a groove is provided on a side of the second plate body facing the first plate body, and the groove and the first plate body together define the cooling medium flow channel, wherein the first plate body is a heat spreader.

[0017] Optionally, the first plate body and the second plate body are connected by brazing.

[0018] In a second aspect, the present disclosure provides a pallet, which includes the above-mentioned cold plate structure, wherein the cold plate is at least configured as a bottom plate of the pallet, or the pallet includes a bottom plate, and the cold plate is installed on the inner side of the bottom plate.

[0019] Optionally, the cold plate includes a bottom wall and a side wall, and the cooling medium flow channel is arranged in the bottom wall of the cold plate; the bottom wall is configured as the bottom plate of the tray, and the side wall is configured as at least a portion of the side beam of the tray; the joint unit includes a first part located on the bottom wall and a second part located on the side wall, and the first part is connected to the second part.

[0020] The present disclosure further provides a battery pack in a third aspect, the battery pack comprising a battery cell group and the above-mentioned tray, wherein a battery cell group accommodating space is formed in the tray, and the battery cell group is arranged in the battery cell group accommodating space.

[0021] The present disclosure further provides a thermal management system in a fourth aspect, which includes an air-conditioning system, and the above-mentioned battery pack or the above-mentioned cold plate structure, the joint unit is connected to the refrigerant pipeline of the air-conditioning system, and the controller is electrically connected to the air-conditioning system.

[0022] The present disclosure further provides an electrical device in a fifth aspect, which includes the above-mentioned battery pack and / or the above-mentioned thermal management system.

[0023] Through the above technical scheme, the cold plate structure provided by the present invention sets the flow channel inlet and the flow channel outlet of the cooling medium flow channel on the second surface facing the outside of the battery pack, and fixes the connector unit on the second surface, and connects the inlet flow channel of the connector unit with the flow channel inlet of the cooling medium flow channel, and connects the outlet flow channel of the connector unit with the flow channel outlet of the cooling medium flow channel, so that the connector unit does not need to pass through the second surface of the cold plate to reach the first surface of the cold plate, that is, the connector unit does not need to pass through the second surface of the cold plate to reach the battery cell accommodating space of the battery pack, thereby avoiding the problem of airtight failure on the inside of the battery pack caused by the connection between the inside and outside of the cold plate due to welding defects or cracks of the connector unit, thereby avoiding the subsequent functional safety warning of the battery pack or even thermal runaway accidents.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 is a perspective schematic diagram of a partial structure of a cold plate structure provided by an exemplary embodiment of the present disclosure;

[0027] Figure 2 This disclosure Figure 1 A schematic diagram of the local structure at A in the middle, wherein the joint unit and the cold plate are shown;

[0028] Figure 3 This disclosure Figure 2 Schematic diagram of the structure of the intercooler plate;

[0029] Figure 4 is a schematic diagram of a three-dimensional structure of a first joint provided by an exemplary embodiment of the present disclosure;

[0030] Figure 5 is a schematic diagram of a three-dimensional structure of a second joint provided by an exemplary embodiment of the present disclosure;

[0031] Figure 6 is a schematic cross-sectional structure diagram of a local structure of a cold plate structure provided by an exemplary embodiment of the present disclosure;

[0032] Figure 7 yes Figure 6 Schematic diagram of the local structure at B in the middle;

[0033] Figure 8 yes Figure 6 Schematic diagram of the local structure at point C in the middle.

[0034] Description of Reference Numerals

[0035] 100, cold plate; 101, cooling medium flow channel; 102, first surface; 103, second surface; 104, flow channel inlet; 105, flow channel outlet; 106, bottom wall; 107, side wall; 110, first plate body; 111, first bottom; 112, first side; 120, second plate body; 121, second bottom; 122, second side;

[0036] 200, connector unit; 201, inlet flow channel; 202, outlet flow channel; 210, first connector; 211, first inlet flow channel; 212, first outlet flow channel; 213, first protrusion; 214, second protrusion; 220, second connector; 221, second inlet flow channel; 222, second outlet flow channel; 223, stopper; 230, inlet pipe; 240, outlet pipe; 250, first positioning groove; 260, second positioning groove; 270, accommodating cavity; 280, mounting hole. DETAILED DESCRIPTION

[0037] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0038] In the description of the present disclosure, it should be understood that the terms "upper", "lower", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "inside and outside" refer to the inside and outside of the corresponding structural contour. In addition, the terms "first", "second", etc. are only used to distinguish one element from another element, and do not have order and importance.

[0039] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0040] In the related art, the flow channel inlet and outlet on the battery pack are arranged on the inner side of the battery pack (that is, arranged in the accommodating space of the battery cell group), and the coolant filling port of the battery pack is arranged on the side beam of the tray of the battery pack for connecting the external cooling pipeline. This requires the coolant filling port to be connected to the inside and outside of the battery pack so that the coolant filling port can be connected to the flow channel inlet and outlet. If there are welding defects or cracks in the weld of the coolant filling port, it is easy to cause the airtightness of the inside of the battery pack to fail, thereby generating a functional safety warning of the battery pack or even a thermal runaway accident.

[0041] In view of this, a first aspect of the present disclosure provides a cold plate structure, such as Figures 1 to 8 As shown, the cold plate structure includes a cold plate 100 and a joint unit 200. The cold plate 100 has a first surface 102 and a second surface 103 opposite to each other. The first surface 102 is suitable for cooling the battery cell group (not shown) of the battery pack. The cold plate 100 has a cooling medium flow channel 101 inside, and the flow channel inlet 104 and the flow channel outlet 105 of the cooling medium flow channel 101 are both arranged on the second surface 103. The joint unit 200 is arranged on the second surface 103. The joint unit 200 has an inlet flow channel 201 and an outlet flow channel 202. One end of the inlet flow channel 201 is connected to the flow channel inlet 104, and one end of the outlet flow channel 202 is connected to the flow channel outlet 105.

[0042] It can be understood that the first surface 102 is suitable for cooling the battery cell group of the battery pack, that is, when the cooling structure is applied to the battery pack, the first surface 102 will be set toward the battery cell group of the battery pack for heat exchange with the battery cell group, and the second surface 103 is opposite to the first surface 102, then the second surface 103 faces away from the battery cell group of the battery pack, that is, the second surface 103 is arranged toward the outside of the battery pack.

[0043] Through the above scheme, the channel inlet 104 and the channel outlet 105 of the cooling medium channel 101 are both arranged on the second surface 103 facing the outside of the battery pack, and the connector unit 200 is also fixed on the second surface 103, and by connecting the inlet channel 201 of the connector unit 200 with the channel inlet 104 of the cooling medium channel 101, and connecting the outlet channel 202 of the connector unit 200 with the channel outlet 105 of the cooling medium channel 101, the connector unit 200 does not need to pass through the second surface 103 of the cold plate 100 to reach the first surface 102 of the cold plate 100, that is, the connector unit 200 does not need to pass through the first surface of the cold plate 100 to the accommodating space of the battery cell group of the battery pack, thereby avoiding the problem of failure of the airtightness of the inside of the battery pack caused by the connection between the inside and outside of the cold plate 100 due to welding defects or cracks of the connector unit 200, thereby avoiding the subsequent functional safety warning of the battery pack or even thermal runaway accidents.

[0044] It should be noted that the function of the above-mentioned cold plate 100 is to perform heat exchange with the battery cell group to control the temperature of the battery cell group during use within a certain stable range. Therefore, the first surface 102 of the cold plate 100 can directly contact the battery cell group to achieve heat exchange, or the first surface 102 of the cold plate 100 can indirectly achieve heat exchange between the cold plate 100 and the battery cell group through a heat-conducting medium arranged between the cold plate 100 and the battery cell group. The present disclosure does not make specific restrictions on this.

[0045] In the present disclosure, the connector unit 200 can be used to connect a cooling system (such as an air conditioning system of an electrical device) disposed outside the battery pack, so that the cooling medium in the cooling system can flow into and out of the cooling medium flow channel 101 inside the cold plate 100, thereby enabling the cold plate 100 to exchange heat with the battery cell group through the flow of the cooling medium.

[0046] Next, we will combine the attached Figure 1-8 The specific implementations of the structure of the cold plate 100 and the structure of the joint unit 200 are described in detail.

[0047] In some optional embodiments, such as Figure 2 and Figure 3 As shown, the cold plate 100 includes a bottom wall 106 and a side wall 107, the cooling medium flow channel 101 is arranged in the bottom wall 106 of the cold plate 100, the flow channel inlet 104 and the flow channel outlet 105 are both located on the bottom wall 106, the bottom wall 106 and the side wall 107 are arranged to enclose a storage space for at least part of the battery cell group of the battery pack, and the connector unit 200 includes a first part located on the bottom wall 106 and a second part located on the side wall 107, and the first part is connected to the second part.

[0048] It can be understood that the bottom wall 106 and the side wall 107 of the cold plate 100 can enclose at least part of the storage space for the battery cell group, and the side wall 107 of the cold plate 100 facing the battery cell group and the side wall 107 of the cold plate 100 facing the battery cell group together constitute the first surface 102 of the cold plate 100. In the above scheme, by setting the structure of the cold plate 100 to enclose at least the storage space for the battery cell group, on the one hand, the battery cell group can be better wrapped and supported, and on the other hand, the side wall 107 of the cold plate 100 can provide an installation base for the connector unit 200. When the cooling system is far from the channel inlet 104 and the channel outlet 105 of the cooling medium channel 101, by positioning the first part of the connector unit 200 at the bottom wall 106 and the second part of the connector unit 200 at the side wall 107, the length of the first part and the second part of the connector unit 200 can be extended, so that the second part of the connector unit 200 can be closer to the cooling pipeline of the cooling system, and it is easier to dock with the cooling pipeline of the cooling system, so as to achieve the connection between the cooling medium channel 101 and the cooling system. In other words, such a design can make the connector unit 200 easy to correspond to the position of the cooling system of the electrical equipment (such as the vehicle air conditioning system), and conveniently connect with the cooling system.

[0049] Of course, in some other optional embodiments, the installation position of the second part of the connector unit 200 may not be set on the side wall 107, and may be adjusted accordingly according to the position of the cooling pipeline of the cooling system so that the second part of the connector unit 200 can be connected to the cooling system.

[0050] Regarding the structures of the first part and the second part of the joint unit 200, in some optional embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the joint unit 200 includes an inlet pipe 230 and an outlet pipe 240. The above-mentioned first part includes a first joint 210, and the first joint 210 has a first inlet channel 211 and a first outlet channel 212. The above-mentioned second part includes a second joint 220, and the second joint 220 has a second inlet channel 221 and a second outlet channel 222. The inlet pipe 230 connects the first inlet channel 211 and the second inlet channel 221 to form an inlet channel 201, and the outlet pipe 240 connects the first outlet channel 212 and the second outlet channel 222 to form an outlet channel 202. The first inlet channel 211 is connected to the channel inlet 104, and the first outlet channel 212 is connected to the channel outlet 105.

[0051] The first part includes a first connector 210, which can be connected to the channel inlet 104 and the channel outlet 105 of the cooling medium channel 101 through the first connector 210, so as to realize the rapid assembly of the first part of the connector unit 200 and the cooling medium channel 101. The second part includes a second connector 220, which can be connected to the cooling system through the second connector 220, so as to realize the rapid assembly of the second part of the connector unit 200 and the cooling system. In addition, the inlet pipe 230 and the outlet pipe 240 are pipe structures, which are easier to bend and deform to adapt to different shapes of the first surface 102, so that the length and bending shape of the inlet pipe 230 and the outlet pipe 240 can be adjusted according to the shape of the first surface 102 between the first connector 210 and the second connector 220 to adapt to different battery pack shapes and the location of the cooling system.

[0052] In the present disclosure, the connection method between the inlet pipe 230 and the first joint 210 and the second joint 220 and the connection method between the outlet pipe 240 and the first joint 210 and the second joint 220 include but are not limited to welding, pipe joint connection and adhesive connection.

[0053] In some optional embodiments, the inlet flow channel 201 and / or the outlet flow channel 202 are provided with a solenoid valve. The solenoid valve provided on the inlet flow channel 201 is used to control the opening and closing of the inlet flow channel 201 and the flow rate, and the solenoid valve provided on the outlet flow channel 202 is used to control the opening and closing of the outlet flow channel 202 and the flow rate. The solenoid valve can be provided on the first joint 210 to constitute a component of the first part; it can also be provided on the second joint 220 to constitute a component of the second part; it can also be provided on the inlet pipe 230 and / or the outlet pipe 240, and the present disclosure does not make any specific restrictions on this.

[0054] In an optional embodiment, if Figure 4 , Figure 5 and Figure 7 As shown, at least one of the first joint 210 and the second joint 220 is provided with a first positioning groove 250, and the end of the inlet pipe 230 is inserted into the first positioning groove 250, and / or, at least one of the first joint 210 and the second joint 220 is provided with a second positioning groove 260, and the end of the outlet pipe 240 is inserted into the second positioning groove 260.

[0055] The first positioning groove 250 is provided so that after the end of the inlet pipe 230 is inserted into the first positioning groove 250, the inlet pipe 230 can be pre-fixed, so that the inlet pipe 230 can be fixed to the first joint 210 and the second joint 220 more conveniently in cooperation with the subsequent process. In addition, it can be understood that after the end of the inlet pipe 230 is inserted into the first positioning groove 250, the inlet pipe 230 can be communicated with the first inlet channel 211 of the first joint 210 where the first positioning groove 250 is located, and / or the inlet pipe 230 can be communicated with the second inlet channel 221 of the second joint 220 where the first positioning groove 250 is located.

[0056] It should be noted that the first positioning groove 250 can be provided only on the first joint 210, or only on the second joint 220, or on both the first joint 210 and the second joint 220, and the present disclosure does not make any specific restrictions on this. In one embodiment provided by the present disclosure, the first positioning groove 250 is provided on both the first joint 210 and the second joint 220 to facilitate the subsequent welding of the first joint 210 and the second joint 220 with the inlet pipe 230.

[0057] Similarly, the second positioning groove 260 is provided so that the outlet pipe 240 can be pre-fixed after the end of the outlet pipe 240 is inserted into the second positioning groove 260. Moreover, after the end of the outlet pipe 240 is inserted into the second positioning groove 260, the outlet pipe 240 can communicate with the first outlet channel 212 of the first joint where the second positioning groove 260 is located, and / or the outlet pipe 240 can communicate with the second outlet channel 222 of the second joint 220 where the second positioning groove 260 is located.

[0058] Of course, the second positioning groove 260 can be provided only on the first joint 210, or only on the second joint 220, or on both the first joint 210 and the second joint 220, and the present disclosure does not make any specific restrictions on this. In one embodiment provided by the present disclosure, the second positioning groove 260 is provided on both the first joint 210 and the second joint 220 to facilitate the subsequent welding of the first joint 210 and the second joint 220 with the outlet pipe 240.

[0059] In some optional embodiments, the inlet pipe 230 is welded to the first joint 220 and the second joint 220, and / or the outlet pipe 240 is welded to the first joint 210 and the second joint 220. Welding can improve the connection strength between the inlet pipe 230 and the corresponding first joint 210 and the second joint 220. Similarly, welding can also improve the connection strength between the outlet pipe 240 and the corresponding first joint 210 and the second joint 220.

[0060] The present disclosure does not limit the connection method between the first joint 210 and the cold plate 100. In one embodiment of the present disclosure, Figure 4 As shown, a first protrusion 213 is provided on the first joint 210, an end of the first inlet channel 211 passes through an end of the first protrusion 213, and the first protrusion 213 can be inserted into the channel inlet 104; and / or, a second protrusion 214 is provided on the first joint 210, an end of the first outlet channel 212 passes through an end of the second protrusion 214, and the second protrusion 214 is inserted into the channel outlet 105.

[0061] It should be noted that the first joint 210 may be provided with only the first protrusion 213, or only the second protrusion 214, or may be provided with both the first protrusion 213 and the second protrusion 214 spaced apart from each other, and the present disclosure does not impose any specific limitation on this. In one embodiment provided in the present disclosure, the first joint 210 is provided with the first protrusion 213 and the second protrusion 214 spaced apart from each other, so that the first joint 210 can be pre-positioned with the flow channel inlet 104 and the flow channel outlet 105 more stably.

[0062] The first protrusion 213 is inserted into the flow channel inlet 104 and the second protrusion 214 is inserted into the flow channel outlet 105, which can realize the pre-positioning of the installation position of the first joint 210 on the first surface 102, so as to more conveniently complete the connection between the first joint 210 and the cold plate 100 and the connection between the second joint 220 and the cold plate 100 in cooperation with the subsequent process. At the same time, the end of the first inlet channel 211 is inserted through the end of the first protrusion 213, which can also increase the connection stability between the first inlet channel 211 and the flow channel inlet 104, and the end of the first outlet channel 212 is inserted through the end of the second protrusion 214, which can also increase the connection stability between the first outlet channel 212 and the flow channel outlet 105.

[0063] The present disclosure does not limit the connection method between the second joint 220 and the cold plate 100. In one embodiment of the present disclosure, Figure 5 and Figure 6 As shown, a stopper 223 is provided at one end of the second joint 220 connected to the cold plate 100, a receiving cavity 270 is provided in the cold plate 100, a mounting hole 280 connected to the receiving cavity 270 is provided on the second surface 103 of the cold plate 100, the stopper 223 is located in the receiving cavity 270 and connected to the cold plate 100, and an end of the second joint 220 away from the stopper 223 passes through the mounting hole 280 and is located outside the cold plate 100.

[0064] The installation hole 280 can be provided to pre-position the installation position of the second joint 220 on the second surface 103. In addition, the stopper 223 and the accommodating cavity 270 can be provided to pre-fix the second joint 220 and further improve the connection stability between the second joint 220 and the cold plate 100.

[0065] The accommodating cavity 270 and the cooling medium flow channel 101 may be connected or not connected, and this is not limited in the present disclosure.

[0066] In some optional embodiments, the first joint 210 is fixed to the cold plate 100 by brazing, and the second joint 220 is fixed to the cold plate 100 by brazing. The brazing method can reduce damage to the cold plate 100 during the welding process, avoid damage to the cold plate 100 due to welding, and thus avoid leakage or failure of airtightness inside the battery pack.

[0067] Furthermore, while the first joint 210 and the cold plate 100 are fixed by brazing and the second joint 220 and the cold plate 100 are fixed by brazing, the first joint 210 and the second joint 220 and the inlet pipe 230 and the outlet pipe 240 are also fixed by brazing. The assembly of the joint unit 200 and the assembly of the joint unit 200 and the cold plate 100 can be completed in the same brazing process, thereby improving the assembly efficiency.

[0068] Of course, it should be pointed out that, in some other optional implementations, the first joint 210 and the cold plate 100 may be fixed by other welding methods such as arc welding and laser welding.

[0069] Regarding the structure of the first part and the second part of the joint unit 200, in some other optional embodiments, the first part and the second part are integrally formed. The integrally formed joint unit 200 eliminates the assembly process of the first part and the second part, and can achieve faster assembly of the cold plate 100 and the joint unit 200.

[0070] On the basis of the integral molding of the first part and the second part, in some optional embodiments, the contour of the part of the first part used for connecting the bottom wall 106 is adapted to the contour of the corresponding part on the bottom wall 106, and the contour of the part of the second part used for connecting the side wall 107 is adapted to the contour of the corresponding part on the side wall 107, that is, the joint unit 200 has a contour adapted to the second surface 103. Such a configuration is, on the one hand, conducive to the first part and the part of the second surface 103 located on the bottom wall 106 are closely arranged, and the second part and the part of the second surface 103 located on the side wall 107 are closely arranged, so as to reduce the occupied space of the joint unit 200 and play a role in saving space; on the other hand, it is conducive to the first part and the second part and the second surface 103 (including the parts located on the bottom wall 106 and the side wall 107) on the cold plate 100 have a larger connection area, so that the first part and the second part are more stably connected to the second surface 103 of the cold plate 100.

[0071] It can be understood that the first part used to connect to the bottom wall 106 has a first connecting surface, and the second surface 103 located on the bottom wall 106 corresponding to the first connecting surface can have a third connecting surface. The contour shape of the first connecting surface can be adapted to the contour shape of the third connecting surface, so that the first connecting surface and the third connecting surface can fit together, and can have better stability after being connected by welding, bonding, etc.

[0072] Similarly, the second portion has a second connecting surface at a portion connected to the side wall 107 of the second surface 103, and the second surface 103 has a fourth connecting surface at a portion on the side wall 107 corresponding to the second connecting surface. The contour shape of the second connecting surface is adapted to the contour shape of the fourth connecting surface, so that the second connecting surface and the fourth connecting surface can fit together and have better stability after being connected by welding, bonding, or other connection methods.

[0073] The present disclosure does not limit the specific structure of the cold plate 100. Figures 6 to 8 As shown, in one embodiment provided by the present disclosure, the cold plate 100 includes a first plate body 110 and a second plate body 120 disposed opposite to each other, and a cooling medium flow channel 101 can be defined between the first plate body 110 and the second plate body 120. The first surface 102 is located on a side of the first plate body 110 away from the second plate body 120, and the second surface 103 is located on a side of the second plate body 120 away from the first plate body 110.

[0074] The cold plate 100 formed by the first plate body 110 and the second plate body 120 can conveniently form the cooling medium flow channel 101 and has higher production efficiency.

[0075] In some optional embodiments, when the cold plate 100 includes a bottom wall 106 and a side wall 107, the first plate body 110 may include a first bottom 111 and a first side 112, and the second plate body 120 may include a second bottom 121 and a second side 122, the first bottom 111 and the second bottom 121 are arranged relative to each other and construct the bottom wall 106 of the cold plate 100, and the first side 112 and the second side 122 are arranged relative to each other and construct the side wall 107 of the cold plate 100.

[0076] In some optional embodiments, a groove is provided on the side of the second plate 120 facing the first plate 110, and the groove and the first plate 110 together define a cooling medium flow channel 101, wherein the first plate 110 is a heat spreader. The groove is provided on the second plate 120, so that the first surface 102 of the first plate 110 can be kept flat, and the strength of the first plate 110 will not be weakened, and the phenomenon of perforation of the first plate 110 causing failure of the sealing of the battery pack can be avoided. The first plate 110 is a heat spreader, which can better exchange heat with the battery cell group.

[0077] It should be noted that the shapes and grooves of the first plate 110 and the second plate 120 can be formed by integrally stamping high-strength aluminum alloy plates. In addition, the connection methods of the first plate 110 and the second plate 120 include but are not limited to laser welding, adhesive connection and brazing connection.

[0078] It can be understood that the cooling medium flow channel 101 defined by the first plate body 110 and the second plate body 120 is defined by sealingly connecting the first plate body 110 and the second plate body 120. The connection method of the first plate body 110 and the second plate body 120 can be fixed and sealed by friction welding, or fixed and sealed by brazing welding or other welding processes, and this is not specifically limited in this embodiment.

[0079] In one embodiment provided by the present disclosure, the first plate body 110 and the second plate body 120 are connected by brazing, and the brazing welding process has high production efficiency and will not damage the first plate body 110 and the second plate body 120. When the joint unit 200 and the cold plate 100 are also connected by brazing, the connection between the first plate body 110 and the second plate body 120 and the connection between the joint unit 200 and the second plate body 120 can be completed in the same process, and the production efficiency is higher.

[0080] It should be pointed out that when the cold plate 100 includes a first plate body 110 and a second plate body 120, and a accommodating cavity 270 is provided in the cold plate 100 and a stop portion 223 is provided in the second joint 220, in the process of processing the cold plate structure, the end of the second joint 220 away from the stop portion 223 can be pre-fixed from a position between the first plate body 110 and the second plate body 120 through the mounting hole 280, and then the first plate body 110 and the second plate body 120 are brazed and fixed.

[0081] It should be noted that the weld between the second joint 220 and the second plate body 120 is located on the side of the second plate body 120 facing away from the first plate body 110 , that is, the outer side of the cold plate 100 .

[0082] Based on the above cold plate structure, the present disclosure further provides a pallet in another aspect, wherein the above cold plate 100 is at least configured as a bottom plate of the pallet, or the pallet includes a bottom plate, and the above cold plate 100 is installed on the inner side of the bottom plate.

[0083] When the cold plate 100 is at least configured as the bottom plate of the tray, the tray does not need to be provided with other bottom plates, so that the cold plate 100 has the functions of exchanging heat for the battery cell group and supporting and wrapping the battery cell group.

[0084] When the cold plate 100 is installed on the inner side of the bottom plate of the tray, since the connector unit 200 does not pass through the first side 102 of the cold plate 100, it can also ensure that the airtightness of the cold plate 100 to the battery cell group will not be damaged. For example, after the cold plate 100 is installed on the inner side of the bottom plate of the tray, the cold plate and the side plates of the tray are sealed and connected and jointly define a battery cell accommodation space for installing the battery cell group. Alternatively, the cold plate has a bottom wall 106 and a side wall 107, and the cold plate defines a battery cell accommodation space for installing the battery cell group through its own bottom wall 106 and side wall 107. In this case, setting the connector unit 200 on the second side 103 of the cold plate 100 can also ensure that the airtightness of the inside of the battery pack will not fail due to welding defects or cracks of the connector unit 200. Moreover, in these cases, the bottom plate of the tray will not directly form a battery cell accommodating space. Therefore, a hole can be opened in the bottom plate of the tray to connect the connector unit with the external cooling medium pipeline (such as the refrigerant pipeline of the air conditioner), or the hole can allow the inlet pipe and outlet pipe in the connector unit to pass through the outside of the tray to facilitate the second connector in the connector unit to be set on the side plate of the tray.

[0085] When the cold plate 100 is at least configured as the bottom plate of the tray, in some optional embodiments, the cold plate 100 includes a bottom wall 106 and a side wall 107, and the cooling medium flow channel 101 is arranged in the bottom wall 106 of the cold plate 100. The bottom wall 106 is configured as the bottom plate of the tray, and the side wall 107 is configured as at least part of the side beam of the tray. The joint unit 200 includes a first part located on the bottom wall 106 and a second part located on the side wall 107, and the first part is connected to the second part.

[0086] The bottom wall 106 and the side wall 107 of the cold plate 100 can enclose a space for placing the battery pack, so as to be better used as a tray. The second part of the joint unit 200 is arranged on the side wall 107, which is closer to the cooling pipeline of the cooling system located near the side beam of the tray, making it more convenient to connect the joint unit 200 with the cooling system.

[0087] Based on the above tray, the present disclosure further provides a battery pack in another aspect, the battery pack comprising a battery cell group and the above tray, wherein a storage space for the battery cell group is formed in the tray, and the battery cell group is arranged in the storage space for the battery cell group. The battery pack having the above tray can avoid the phenomenon of achieving airtightness inside the battery pack.

[0088] Based on the above-mentioned battery pack, the present disclosure further provides a thermal management system in another aspect, which includes an air-conditioning system, and the above-mentioned battery pack or the above-mentioned cold plate structure, and the joint unit 200 is connected to the refrigerant pipeline of the air-conditioning system.

[0089] By connecting the connector unit 200 on the battery pack or cold plate structure to the refrigerant pipeline of the air-conditioning system, the air-conditioning system can provide cooling medium to the cooling medium flow channel 101, thereby cooling the battery cell group of the battery pack through heat exchange, so that the battery cell group of the battery pack operates within an appropriate temperature range.

[0090] It should be pointed out that the thermal management system may also include a controller, which may be electrically connected to the air-conditioning system. In this way, the controller can be used to control the start / stop and operating power of the air-conditioning system, thereby controlling the heat exchange effect of the refrigerant pipeline of the air-conditioning system, and further controlling the heat exchange efficiency between the cold plate 100 and the battery cell group in the battery pack, thereby achieving more precise thermal management of the battery cell group.

[0091] Based on the above-mentioned thermal management system, the present disclosure further provides an electrical device in another aspect, the electrical device comprising the above-mentioned battery pack and / or the above-mentioned thermal management system.

[0092] Here, the electrical equipment may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc., the spacecraft may include an airplane, a rocket, a space shuttle and a spacecraft, etc., the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric airplane toy, etc., the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc., and the present disclosure does not limit this. When the electrical equipment is a vehicle, the above-mentioned thermal management system is a thermal management system for the vehicle.

[0093] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0095] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A cold plate structure, It is characterized in that include: A cold plate, wherein the cold plate has a first surface and a second surface opposite to each other, the first surface is suitable for cooling the battery cell group of the battery pack, the cold plate has a cooling medium flow channel inside, and the flow channel inlet and the flow channel outlet of the cooling medium flow channel are both arranged on the second surface; The joint unit is arranged on the second surface, and the joint unit has an inlet flow channel and an outlet flow channel, one end of the inlet flow channel is connected to the flow channel inlet, and one end of the outlet flow channel is connected to the flow channel outlet.

2. The cold plate structure according to claim 1, It is characterized in that The cold plate includes a bottom wall and a side wall; The cooling medium flow channel is arranged in the bottom wall of the cold plate, and the flow channel inlet and the flow channel outlet are both located on the bottom wall; The bottom wall and the side wall are configured to enclose a storage space for at least part of the battery cell group of the battery pack; The joint unit includes a first portion located on the bottom wall and a second portion located on the side wall, and the first portion is communicated with the second portion.

3. The cold plate structure according to claim 2, It is characterized in that The joint unit also includes an inlet pipe and an outlet pipe; The first portion includes a first joint having a first inlet flow channel and a first outlet flow channel; The second portion includes a second joint having a second inlet flow channel and a second outlet flow channel; The inlet pipe is connected to the first inlet channel and the second inlet channel to form the inlet channel, and the outlet pipe is connected to the first outflow channel and the second outflow channel to form the outflow channel; The first inlet channel is communicated with the channel inlet, and the first outlet channel is communicated with the channel outlet.

4. The cold plate structure according to claim 3, It is characterized in that At least one of the first joint and the second joint is provided with a first positioning groove, and the end of the inlet pipe is inserted into the first positioning groove, and / or, At least one of the first joint and the second joint is provided with a second positioning groove, and the end of the outlet pipe is inserted into the second positioning groove.

5. The cold plate structure according to claim 3, It is characterized in that The inlet pipe is welded and fixed to the first joint and the second joint, and / or, The outlet pipe is fixed to the first joint and the second joint by welding.

6. The cold plate structure according to claim 3, It is characterized in that The first joint is provided with a first protrusion, the end of the first inlet channel passes through the end of the first protrusion, and the first protrusion is inserted into the inlet of the flow channel; and / or, The first joint is provided with a second protrusion, the end of the first outflow channel passes through the end of the second protrusion, and the second protrusion is inserted into the flow channel outlet.

7. The cold plate structure according to claim 3, It is characterized in that A stopper is provided at one end of the second joint connected to the cold plate, a receiving cavity is provided inside the cold plate, and a mounting hole communicating with the receiving cavity is provided on the second surface of the cold plate; The stopper is located in the accommodating cavity and connected to the cold plate, and one end of the second joint away from the stopper passes through the mounting hole and is located outside the cold plate.

8. The cold plate structure according to claim 3, It is characterized in that The first joint is fixed to the cold plate by brazing, and the second joint is fixed to the cold plate by brazing.

9. The cold plate structure according to claim 2, It is characterized in that The first part and the second part are integrally formed.

10. The cold plate structure according to claim 9, It is characterized in that The contour of the portion of the first part used for connecting to the bottom wall is matched with the contour of the corresponding portion on the bottom wall, and the contour of the portion of the second part used for connecting to the side wall is matched with the contour of the corresponding portion on the side wall.

11. The cold plate structure according to any one of claims 1 to 10, It is characterized in that The cold plate comprises a first plate body and a second plate body which are arranged opposite to each other, and the cooling medium flow channel can be defined between the first plate body and the second plate body; The first surface is located on a side of the first plate body away from the second plate body, and the second surface is located on a side of the second plate body away from the first plate body.

12. The cold plate structure according to claim 11, It is characterized in that A groove is provided on a side of the second plate body facing the first plate body, and the groove and the first plate body together define the cooling medium flow channel, wherein the first plate body is a heat spreader.

13. The cold plate structure according to claim 11, It is characterized in that The first plate body and the second plate body are connected by brazing.

14. A pallet, It is characterized in that The cold plate structure comprises any one of claims 1 to 13, wherein the cold plate is at least configured as a bottom plate of the tray, or the tray comprises a bottom plate, and the cold plate is installed on the inner side of the bottom plate.

15. The tray according to claim 14, It is characterized in that The cold plate comprises a bottom wall and a side wall, and the cooling medium flow channel is arranged in the bottom wall of the cold plate; The bottom wall is configured as a bottom plate of the pallet, and the side wall is configured as at least a portion of a side beam of the pallet; The joint unit includes a first portion located on the bottom wall and a second portion located on the side wall, and the first portion is communicated with the second portion.

16. A battery pack, It is characterized in that It comprises a battery cell group and a tray as claimed in claim 14 or 15, wherein a battery cell group accommodating space is formed in the tray, and the battery cell group is arranged in the battery cell group accommodating space.

17. A thermal management system, It is characterized in that It comprises an air conditioning system, and the battery pack according to claim 16 or the cold plate structure according to any one of claims 1 to 13, wherein the joint unit is connected to a refrigerant pipeline of the air conditioning system.

18. An electrical device, It is characterized in that Comprising the battery pack according to claim 16, and / or comprising the thermal management system according to claim 17.

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