Cold plate and battery module with same

Abstract

The utility model discloses a cold plate and a battery module with the cold plate, the cold plate is used for the battery module and comprises a runner plate and a heat exchange plate, and the runner plate defines a runner; the heat exchange plate covers one side of the runner plate in the thickness direction, the heat exchange plate is used for sealing the runner, the heat exchange plate is arranged on one side, close to a battery cell in the battery module, of the runner plate and is connected with the battery cell, bending parts are arranged at the two ends of the heat exchange plate in the width direction, and the bending parts are bent in the direction away from the battery cell; insulating layers are arranged on the surface of one side, close to the battery cell, of the heat exchange plate and the outer surface of the bent part. According to the cold plate provided by the utility model, the bending part can replace two side walls in the width direction of the heat exchange plate, so that the insulation of the two side walls in the width direction of the heat exchange plate can be easily realized, the breakdown or sparking phenomenon of the battery module during insulation detection is avoided, and the detection result is avoided that the battery module is a defective product.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of batteries, in particular to a cold plate and a battery module having the same. Background Art

[0002] In the prior art, when the two ends of the battery module in the width direction are flush with the two ends of the heat exchange plate in the width direction, the side walls of the two ends of the heat exchange plate in the width direction need to be insulated. However, the edges of the two sides of the cold plate in the width direction are generally cut by laser or punched by a mold, and there are burrs and right-angle chamfers. The burrs and right-angle chamfers can easily pierce the insulation layer, causing insulation failure of the heat exchange plate. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a cold plate, which can easily achieve insulation of two side walls in the width direction of the heat exchange plate to prevent the battery module from being broken down or ignited during insulation detection.

[0004] The utility model also provides a battery module, which includes the above-mentioned cold plate.

[0005] According to the cold plate of the embodiment of the utility model, it is used for the battery module and includes a flow channel plate and a heat exchange plate, the flow channel plate defines a flow channel; the heat exchange plate cover is arranged on one side of the flow channel plate in the thickness direction, the heat exchange plate is used to seal the flow channel, the heat exchange plate is arranged on the side of the flow channel plate close to the battery cell in the battery module and is connected to the battery cell, bending portions are provided at both ends of the heat exchange plate in the width direction, the bending portions are bent in the direction away from the battery cell, and the surface of the heat exchange plate on the side close to the battery cell and the outer surface of the bending portion are both provided with an insulating layer.

[0006] According to the cold plate of the embodiment of the utility model, the flow channel plate and the heat exchange plate jointly define a sealed flow channel, the heat exchange plate is arranged on the side of the flow channel plate close to the battery cell in the battery module and connected to the battery cell, and the heat exchange plate can exchange heat with the battery cell. The bending parts at both ends of the width direction of the heat exchange plate are bent in the direction away from the battery cell, and the surface of the side of the heat exchange plate close to the battery cell and the outer surface of the bending part are both provided with an insulating layer. The bending part can replace the two side walls in the width direction of the heat exchange plate, and the insulation of the two side walls in the width direction of the heat exchange plate can be achieved more easily, so as to avoid the battery module from being broken down or sparking during the insulation detection, and avoid the detection result being a defective product.

[0007] In some embodiments of the present invention, along the width direction of the heat exchange plate, the length L of the bent portion satisfies: 2mm≤L≤5mm.

[0008] In some embodiments of the present invention, along the width direction of the heat exchange plate, the bending portion is arranged outside the edge of the flow channel plate.

[0009] In some embodiments of the present invention, along the width direction of the heat exchange plate, a maximum distance H between the edge of the flow channel plate and the bending portion satisfies: 2mm≤H≤5mm.

[0010] In some embodiments of the present invention, a cross section of the bent portion along the width direction of the heat exchange plate is an arc surface.

[0011] In some embodiments of the present invention, the bending radius R of the bending portion satisfies: 1mm≤R≤3mm.

[0012] In some embodiments of the present invention, the thickness of the insulating layer is 100-300 μm.

[0013] In some embodiments of the present invention, the insulating layer is an insulating paint layer.

[0014] In some embodiments of the present invention, the cold plate further includes a water inlet nozzle and a water outlet nozzle, the water inlet nozzle is connected to the flow channel and is used to input heat exchange medium into the flow channel; the water outlet nozzle is connected to the flow channel and is used for the flow channel to flow out heat exchange medium to the outside.

[0015] The battery module according to the embodiment of the utility model includes a plurality of battery cells and the above-mentioned cold plate.

[0016] According to the battery module of the embodiment of the utility model, the flow channel plate and the heat exchange plate are used to define a sealed flow channel, and the heat exchange plate is arranged on the side of the flow channel plate close to the battery cell in the battery module and connected to the battery cell, so that the heat exchange plate can exchange heat with the battery cell. The bending parts at both ends of the width direction of the heat exchange plate are bent in the direction away from the battery cell, and the surface of the side of the heat exchange plate close to the battery cell and the outer surface of the bending part are both provided with an insulating layer. The bending part can replace the two side walls of the heat exchange plate in the width direction, and the insulation of the two side walls of the heat exchange plate in the width direction can be achieved more easily, so as to avoid the battery module from being broken down or sparked during the insulation detection, and avoid the detection result being a defective product.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1is a front view of a cold plate according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 It is a front view of a battery module according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100. Battery module;

[0024] 10. Cold plate;

[0025] 1. Runner plate;

[0026] 2. heat exchange plate; 21. bending portion; 22. insulation layer;

[0027] 3. Water inlet nozzle;

[0028] 4. Water outlet nozzle;

[0029] 20. Battery cell. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it is necessary to understand 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Reference below Figure 1-Figure 2 A cold plate 10 according to an embodiment of the present invention is described.

[0034] like Figure 1 and Figure 2 As shown, the cold plate 10 according to the embodiment of the utility model includes a flow channel plate 1 and a heat exchange plate 2 .

[0035] Specifically, Figure 3 As shown, the cold plate 10 is used for the battery module 100. The cold plate 10 can conduct the heat inside the battery module 100 to the outside of the battery module 100, thereby reducing the temperature of the battery module 100, slowing down the rate of chemical reactions inside the battery cells 20 in the battery module 100, protecting the performance and service life of the battery module 100, and reducing the impact on other components.

[0036] The flow channel plate 1 defines a flow channel, and the heat exchange medium in the cold plate 10 flows in the flow channel. The heat exchange plate 2 is provided in the thickness direction of the flow channel plate 1 (such as Figure 1 On one side of the cold plate 10 (in the thickness direction shown in the figure), the heat exchange plate 2 is used to seal the flow channel. A well-sealed flow channel can ensure that the heat exchange medium flows smoothly in the cold plate 10, avoid leakage of the heat exchange medium, thereby effectively taking away the heat and ensuring the cooling effect of the cold plate 10.

[0037] like Figure 2 and Figure 3 As shown, the heat exchange plate 2 is arranged on one side of the flow channel plate 1 close to the battery cell 20 in the battery module 100 and is connected to the battery cell 20. The heat exchange plate 2 can exchange heat with the battery cell 20. When the temperature of the battery module 100 is high, the temperature of the heat exchange medium in the flow channel is low. The heat exchange plate 2 transfers the cold of the heat exchange medium in the flow channel to the battery cell 20, and transfers the heat of the battery cell 20 to the heat exchange medium, thereby realizing heat exchange between the heat exchange medium and the battery cell 20; when the external ambient temperature is low, the temperature of the battery cell 20 is low, and the temperature of the heat exchange medium in the flow channel is high. The heat exchange plate 2 transfers the heat of the heat exchange medium in the flow channel to the battery cell 20, and transfers the cold of the battery cell 20 to the heat exchange medium, thereby realizing heat exchange between the heat exchange medium and the battery cell 20.

[0038] In the prior art, when the two ends of the battery module in the width direction are flush with the two ends of the heat exchange plate in the width direction, the side walls of the two ends of the heat exchange plate in the width direction need to be insulated. However, the edges of the two sides of the cold plate in the width direction are generally cut by laser or punched by a mold, and there are burrs and right-angle chamfers. The burrs and right-angle chamfers can easily pierce the insulation layer, causing insulation failure of the heat exchange plate.

[0039] like Figure 1 and Figure 2 As shown, the width direction of the heat exchange plate 2 (such as Figure 1 The heat exchange plate 2 is provided with bending portions 21 at both ends (in the width direction as shown), and the bending portions 21 are bent in the direction away from the battery cell 20. The surface of the side of the heat exchange plate 2 close to the battery cell 20 and the outer surface of the bending portion 21 are provided with an insulating layer 22. The bending portions 21 can replace the two side walls in the width direction of the heat exchange plate 2, and can more easily achieve the insulation of the two side walls in the width direction of the heat exchange plate 2, thereby avoiding breakdown or sparking of the battery module 100 during insulation detection, and avoiding the detection result being a defective product.

[0040] According to the cold plate 10 of the embodiment of the utility model, the flow channel plate 1 and the heat exchange plate 2 define a sealed flow channel together, and the heat exchange plate 2 is arranged on the side of the flow channel plate 1 close to the battery cell 20 in the battery module 100 and connected to the battery cell 20, so that the heat exchange plate 2 can exchange heat with the battery cell 20. The bending portions 21 at both ends of the width direction of the heat exchange plate 2 are bent in the direction away from the battery cell 20, and the surface of the side of the heat exchange plate 2 close to the battery cell 20 and the outer surface of the bending portion 21 are both provided with an insulating layer 22. The bending portion 21 can replace the two side walls in the width direction of the heat exchange plate 2, and the insulation of the two side walls in the width direction of the heat exchange plate 2 can be easily achieved, so as to avoid the battery module 100 from being broken down or sparking during the insulation detection, and avoid the detection result being a defective product.

[0041] In some embodiments of the present invention, Figure 1 and Figure 2As shown, along the width direction of the heat exchange plate 2, the length L of the bend 21 satisfies: 2mm≤L≤5mm. It can be understood that along the width direction of the heat exchange plate 2, the length L of the bend 21 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm or 5mm. Along the width direction of the heat exchange plate 2, the length L of the bent portion 21 is not less than 2 mm, so that the bent portion 21 can cover the side walls of the two ends of the heat exchange plate 2 in the width direction after being bent, and the insulating layer 22 on the bent portion 21 can achieve the insulation effect of the two ends of the heat exchange plate 2 in the width direction, avoiding the battery module 100 from being broken down or sparked during insulation detection, and avoiding the detection result being a defective product; along the width direction of the heat exchange plate 2, the length L of the bent portion 21 is not greater than 5 mm, which can avoid the heat exchange plate 2 from being larger in size and the bending process from being more complicated, and the size of the bent portion 21 is smaller, which can avoid the cold plate 10 from being too large in size, the battery module 100 from being too large in size, and the battery module 100 from being too large in installation space.

[0042] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, along the width direction of the heat exchange plate 2, the bent portion 21 is arranged outside the edge of the flow channel plate 1. The width direction dimension of the flow channel plate 1 is small, and the bent portion 21 on the heat exchange plate 2 can be avoided, which facilitates the assembly of the heat exchange plate 2 and the flow channel plate 1.

[0043] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the bending portion 21 and the heat exchange plate 2 are an integrally formed part, which can reduce the processing steps of the heat exchange plate 2; and the bending portion 21 is arranged outside the edge of the flow channel plate 1. When the bending portion 21 is bent, only the heat exchange plate 2 is bent, and there is no need to bend the flow channel plate 1, so that the bending process of the bending portion 21 is relatively simple.

[0044] In some embodiments of the present invention, Figure 1 and Figure 2As shown, along the width direction of the heat exchange plate 2, the maximum distance H between the edge of the flow channel plate 1 and the bent portion 21 satisfies: 2mm≤H≤5mm. It can be understood that, along the width direction of the heat exchange plate 2, the maximum distance H between the edge of the flow channel plate 1 and the bent portion 21 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm or 5mm. Along the width direction of the heat exchange plate 2, the maximum distance H between the edge of the flow channel plate 1 and the bent portion 21 is not less than 2 mm, which can achieve the avoidance effect of the flow channel plate 1 and avoid interference between the flow channel plate 1 and the bent portion 21; along the width direction of the heat exchange plate 2, the maximum distance H between the edge of the flow channel plate 1 and the bent portion 21 is not greater than 5 mm, which can avoid the flow channel plate 1 from being too large, avoid the battery module 100 from being too large, and avoid the installation space required for the battery module 100 being too large.

[0045] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the cross section of the bending portion 21 along the width direction of the heat exchange plate 2 is an arc surface, and the transition between the heat exchange plate 2 and the bending portion 21 is relatively smooth, which can avoid the bending portion 21 from breaking due to stress concentration and increase the safety of the bending portion 21.

[0046] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the bending radius R of the bending portion 21 satisfies: 1mm≤R≤3mm. It is understandable that the bending radius R of the bending portion 21 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm. The bending radius R of the bending portion 21 is not less than 1 mm, so that the bending portion 21 can replace the two side walls in the width direction of the heat exchange plate 2, and can more easily achieve the insulation of the two side walls in the width direction of the heat exchange plate 2, thereby avoiding breakdown or sparking of the battery module 100 during insulation detection, and avoiding the detection result being a defective product; the bending radius R of the bending portion 21 is not greater than 3 mm, which can avoid the bending portion 21 from being bent to a large extent, and can avoid the bending portion 21 from breaking.

[0047] In some embodiments of the present invention, the thickness of the insulating layer 22 is 100-300 μm. It is understandable that the thickness of the insulating layer 22 can be 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, 250 mm, 260 mm, 270 mm, 280 mm, 290 mm or 300 mm. The thickness of the insulating layer 22 is not less than 100 mm, which can ensure the insulation effect of the insulating layer 22, prevent the current inside the battery cell 20 from leaking to the outside, and ensure the electrical safety of the battery module 100; the thickness of the insulating layer 22 is not more than 300 mm, which can reduce the processing cost of the insulating layer 22, thereby reducing the processing and manufacturing cost of the battery module 100.

[0048] In some embodiments of the present invention, the insulating layer 22 is an insulating paint layer. The insulating paint can maintain an insulating state in a high temperature environment, and can still maintain the insulation between the battery cell 20 and the cold plate 10 after the battery cell 20 is heated up. In addition, the insulating paint has good insulation performance, and the insulation effect between the battery cell 20 and the cold plate 10 is good.

[0049] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the cold plate 10 further includes a water inlet nozzle 3 and a water outlet nozzle 4. The water inlet nozzle 3 is connected to the flow channel for inputting heat exchange medium into the flow channel, and the water outlet nozzle 4 is connected to the flow channel for the flow channel to discharge heat exchange medium to the outside.

[0050] When the temperature of the battery module 100 is high, the water inlet nozzle 3 introduces a heat exchange medium with a lower temperature into the flow channel. The temperature of the heat exchange medium in the flow channel is low, and the heat exchange plate 2 transfers the cold of the heat exchange medium in the flow channel to the battery cell 20, and transfers the heat of the battery cell 20 to the heat exchange medium, so as to realize heat exchange between the heat exchange medium and the battery cell 20. At this time, the heat exchange medium with a higher temperature flows out of the cold plate 10 through the water outlet nozzle 4; when the external ambient temperature is low, the temperature of the battery cell 20 is low, and the water inlet nozzle 3 introduces a heat exchange medium with a higher temperature into the flow channel. The temperature of the heat exchange medium in the flow channel is high, and the heat exchange plate 2 transfers the heat of the heat exchange medium in the flow channel to the battery cell 20, and transfers the cold of the battery cell 20 to the heat exchange medium, so as to realize heat exchange between the heat exchange medium and the battery cell 20. At this time, the heat exchange medium with a lower temperature flows out of the cold plate 10 through the water outlet nozzle 4.

[0051] When the battery module 100 is used in a vehicle, the water inlet nozzle 3 and the water outlet nozzle 4 are respectively connected to the intercooler on the vehicle. The high-temperature heat exchange medium flowing out of the water outlet nozzle 4 is finally returned to the intercooler on the vehicle through the pipeline for cooling, thereby circulating the heat exchange medium.

[0052] According to the battery module 100 of the embodiment of the present utility model, Figure 3 As shown, it includes a cold plate 10 and multiple groups of battery cells 20 , and the multiple groups of battery cells 20 are connected to the heat exchange plate 2 .

[0053] According to the battery module 100 of the embodiment of the utility model, the flow channel plate 1 and the heat exchange plate 2 define a sealed flow channel together, and the heat exchange plate 2 is arranged on the side of the flow channel plate 1 close to the battery cell 20 in the battery module 100 and connected to the battery cell 20, so that the heat exchange plate 2 can exchange heat with the battery cell 20. The bending portions 21 at both ends of the width direction of the heat exchange plate 2 are bent in the direction away from the battery cell 20, and the surface of the side of the heat exchange plate 2 close to the battery cell 20 and the outer surface of the bending portion 21 are both provided with an insulating layer 22. The bending portion 21 can replace the two side walls in the width direction of the heat exchange plate 2, and the insulation of the two side walls in the width direction of the heat exchange plate 2 can be easily achieved, so as to avoid the battery module 100 from being broken down or sparked during insulation detection, and avoid the detection result being a defective product.

[0054] Other structures and operations of the cold plate 10 and the battery module 100 having the same according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cold plate, characterized in that: For battery modules and comprising: A flow channel plate, wherein the flow channel plate defines a flow channel; A heat exchange plate, wherein the heat exchange plate cover is arranged on one side of the flow channel plate in the thickness direction, the heat exchange plate is used to seal the flow channel, the heat exchange plate is arranged on a side of the flow channel plate close to the battery cell in the battery module and is connected to the battery cell, and bending portions are provided at both ends of the heat exchange plate in the width direction, and the bending portions are bent in a direction away from the battery cell, and an insulating layer is provided on the surface of the heat exchange plate on the side close to the battery cell and the outer surface of the bending portion.

2. The cold plate according to claim 1, characterized in that Along the width direction of the heat exchange plate, the length L of the bent portion satisfies: 2mm≤L≤5mm.

3. The cold plate according to claim 1, characterized in that Along the width direction of the heat exchange plate, the bending portion is arranged outside the edge of the flow channel plate.

4. The cold plate according to claim 1, characterized in that Along the width direction of the heat exchange plate, a maximum distance H between the edge of the flow channel plate and the bending portion satisfies: 2mm≤H≤5mm.

5. The cold plate according to claim 1, characterized in that The cross section of the bent portion along the width direction of the heat exchange plate is an arc surface.

6. The cold plate according to claim 5, characterized in that The bending radius R of the bending portion satisfies: 1mm≤R≤3mm.

7. The cold plate according to claim 1, characterized in that The thickness of the insulating layer is 100-300 μm.

8. The cold plate according to claim 1, characterized in that The insulating layer is an insulating paint layer.

9. The cold plate according to claim 1, characterized in that Also includes: A water inlet nozzle, the water inlet nozzle is connected to the flow channel and is used to input a heat exchange medium into the flow channel; A water outlet nozzle is connected to the flow channel and is used for the flow channel to flow out the heat exchange medium to the outside.

10. A battery module, characterized in that: include: The cold plate according to any one of claims 1 to 9; A plurality of groups of battery cells are connected to the heat exchange plate.

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