Direct cooling plate for battery, battery and vehicle

Abstract

The utility model discloses a direct cooling plate for a battery, the battery and a vehicle, the direct cooling plate comprises a plate body, a first flow channel area and a second flow channel area are symmetrically arranged on the plate body, and a first cooling flow channel and a second cooling flow channel are respectively formed in the first flow channel area and the second flow channel area; the cooling liquid interface is arranged at the edge of the plate body and is arranged opposite to the first flow channel area; wherein a first buffer flow channel and a second buffer flow channel which are used for respectively communicating a cooling liquid interface with the first cooling flow channel and the second cooling flow channel are formed in the plate body, and the flow resistance of the first buffer flow channel is greater than that of the second buffer flow channel. According to the direct cooling plate, the battery cooling efficiency can be improved, the number of parts is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a direct cooling plate for batteries, a battery and a vehicle. Background Art

[0002] Power batteries are one of the key power sources of new energy vehicles. At the same time, when charging and discharging, power batteries will generate a lot of heat due to the internal resistance of the battery itself. The accumulated heat will cause the battery temperature to rise, the charging and discharging capacity to weaken, and the risk of thermal runaway of the battery to increase. In the prior art, the liquid cooling heat exchange of power batteries is to add a plate heat exchanger to the vehicle air conditioning system to cool the coolant required for the battery pack, and to control the circulation of the coolant in the battery pack to take away the heat generated by the battery. However, the plate heat exchanger, water pump and other parts used in the liquid cooling heat exchange increase the cost of the vehicle, and the space required for the arrangement of parts is large. 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, one purpose of the utility model is to provide a direct cooling plate for a battery. The direct cooling plate of the present application can improve the cooling efficiency of the battery, reduce the number of parts, and reduce costs.

[0004] The utility model also provides a battery with the direct cooling plate.

[0005] The utility model also provides a vehicle with the battery.

[0006] According to the utility model, a direct cooling plate for a battery comprises: a plate body, on which a first flow channel area and a second flow channel area are symmetrically arranged, and a first cooling flow channel and a second cooling flow channel are respectively formed in the first flow channel area and the second flow channel area; a cooling liquid interface, which is arranged at the edge of the plate body and is directly opposite to the first flow channel area; wherein a first buffer flow channel and a second buffer flow channel are respectively formed in the plate body, which connect the cooling liquid interface with the first cooling flow channel and the second cooling flow channel, and the flow resistance of the first buffer flow channel is greater than the flow resistance of the second buffer flow channel.

[0007] According to the utility model, a direct cooling plate for a battery is provided with a first flow channel area and a second flow channel area symmetrically on the plate body, and the first flow channel area and the second flow channel area correspond to two battery cells respectively. The refrigerant circulates in the first cooling channel and the second cooling channel and absorbs heat by phase change to dissipate heat from the battery cells. In the direct cooling plate of the present application, the refrigerant can directly absorb heat by phase change, and compared with the liquid cooling heat dissipation in the prior art, the plate heat exchanger and components such as the electronic water pump and the coolant kettle can be reduced, so as to realize lightweighting of the whole vehicle and reduce the cost of the whole vehicle. The first buffer channel and the second buffer channel are provided to connect the coolant structure to the first cooling channel and the second cooling channel respectively, and the flow resistance in the first cooling channel and the second cooling channel is controlled to avoid too much difference in heat exchange efficiency of the battery cells and affect the safety of battery operation.

[0008] According to some embodiments of the utility model, a first buffer zone and a second buffer zone are formed on the plate body, and the first buffer zone and the second buffer zone are respectively located between the edge of the plate body and the first flow channel area and the second flow channel area, and the first buffer zone and the second buffer zone are directly opposite to each other in the width direction of the plate body.

[0009] According to some embodiments of the present invention, the number of bends in the first buffer flow channel is greater than the number of bends in the second buffer flow channel.

[0010] According to some embodiments of the present invention, a plurality of branches are formed in the first cooling channel, each branch having a first channel section and a second channel section respectively, the first channel section and the second channel section are connected, and the refrigerant flow direction in the first channel section is opposite to the refrigerant flow direction in the second channel section, and a plurality of branches are formed in the second cooling channel, each branch having a third channel section and a fourth channel section respectively, the third channel section and the fourth channel section are connected, and the refrigerant flow direction in the third channel section is opposite to the refrigerant flow direction in the fourth channel section.

[0011] According to some embodiments of the utility model, the direct cooling plate also includes: a first return channel, one end of which is arranged at the other side edge of the plate body and connected to the first cooling channel, and the other end of the first return channel is connected to the cooling liquid interface; a second return channel, one end of which is arranged at the other side edge of the plate body and connected to the second cooling channel, and the other end of the second return channel is connected to the cooling liquid interface.

[0012] According to some embodiments of the present invention, the number of bends in the second return flow channel is less than the number of bends in the first return flow channel.

[0013] According to some embodiments of the present invention, the first reflow channel and the second reflow channel pass through both sides of the plate body in the width direction respectively, and the first reflow channel and the second reflow channel pass through the outer periphery of the first buffer zone and the outer periphery of the second buffer zone respectively.

[0014] According to some embodiments of the present invention, the diameters of the first cooling channel and the second cooling channel are d and satisfy 2mm≤d≤13mm.

[0015] The following briefly describes a battery according to another embodiment of the present invention.

[0016] The battery according to the utility model includes the direct cooling plate described in any one of the above embodiments. Since the battery according to the utility model includes the direct cooling plate described in any one of the above embodiments, the battery heat dissipation of the present application requires fewer components, thereby reducing the battery cost, and the battery heat dissipation efficiency is high, ensuring the safety of battery use.

[0017] A vehicle according to another embodiment of the present invention will be briefly described below.

[0018] The vehicle according to the utility model includes the battery described in any one of the above embodiments. Since the vehicle according to the utility model includes the battery described in any one of the above embodiments, the vehicle according to the utility model has lower vehicle cost, smaller battery space, high battery heat dissipation efficiency, and better vehicle safety.

[0019] 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

[0020] 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:

[0021] Figure 1 It is a structural schematic diagram of a direct cooling plate according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] Direct cooling plate 1;

[0024] Plate body 11, cooling liquid interface 111;

[0025] A first cooling channel 121 and a second cooling channel 122;

[0026] A first buffer flow channel 131 and a second buffer flow channel 132;

[0027] The first return flow channel 141 and the second return flow channel 142 . DETAILED DESCRIPTION

[0028] 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.

[0029] Power batteries are one of the key power sources of new energy vehicles. At the same time, when charging and discharging, power batteries will generate a lot of heat due to the internal resistance of the battery itself. The accumulated heat will cause the battery temperature to rise, the charging and discharging capacity to weaken, and the risk of thermal runaway of the battery to increase. In the prior art, the liquid cooling heat exchange of power batteries is to add a plate heat exchanger to the vehicle air conditioning system to cool the coolant required for the battery pack, and to control the circulation of the coolant in the battery pack to take away the heat generated by the battery. However, the plate heat exchanger, water pump and other parts used in the liquid cooling heat exchange increase the cost of the vehicle, and the space required for the arrangement of parts is large.

[0030] Reference below Figure 1 A direct cooling plate for a battery according to an embodiment of the present invention is described.

[0031] According to the utility model, a direct cooling plate 1 for a battery includes a plate body 11 and a cooling liquid interface 111, wherein a first flow channel area and a second flow channel area are symmetrically arranged on the plate body 11, and a first cooling flow channel 121 and a second cooling flow channel 122 are respectively formed in the first flow channel area and the second flow channel area; the cooling liquid interface 111 is arranged at the edge of the plate body 11 and is arranged opposite to the first flow channel area; wherein a first buffer flow channel 131 and a second buffer flow channel 132 are respectively formed in the plate body 11, and the cooling liquid interface 111 is respectively connected to the first cooling flow channel 121 and the second cooling flow channel 122, and the flow resistance of the first buffer flow channel 131 is greater than the flow resistance of the second buffer flow channel 132.

[0032] like Figure 1 As shown, a first flow channel area and a second flow channel area are provided on the plate body 11, which are symmetrical about the center line. Since the battery cells are arranged symmetrically, the first flow channel area and the second flow channel area can respectively correspond to two battery cells and dissipate heat for the two battery cells respectively. A coolant interface 111 is provided on the plate body 11, and the refrigerant enters the first flow channel area and the second flow channel area through the coolant interface 111. The refrigerant undergoes a phase change in the direct cooling plate 1, and the refrigerant vaporizes and absorbs heat. The refrigerant circulates in the first flow channel area and the second flow channel area and absorbs heat through phase change to carry away the heat of the battery cells, thereby realizing the heat dissipation of the battery cells.

[0033] Among them, a first buffer flow channel 131 is arranged between the coolant interface 111 and the first flow channel area, and a second buffer flow channel 132 is arranged between the coolant interface 111 and the second flow channel area. Since the coolant interface 111 is arranged on the side of the plate body 11 facing the first flow channel area, the coolant interface 111 is directly opposite to the first flow channel area, and the distance between the coolant interface 111 and the second flow channel area is greater than the distance between the coolant interface 111 and the first flow channel area. Therefore, in order to ensure that the refrigerant flow rate in the first flow channel area and the second flow channel area is approximately the same, the first buffer flow channel 131 and the second buffer flow channel 132 are arranged to connect the coolant interface 111 with the first flow channel area and the second flow channel area respectively, and the flow resistance of the first buffer flow channel 131 is greater than the flow resistance of the second buffer flow channel 132.

[0034] According to the direct cooling plate 1 for batteries of the utility model, a first flow channel area and a second flow channel area are symmetrically arranged on the plate body 11, and the first flow channel area and the second flow channel area correspond to two battery cells respectively. The refrigerant circulates in the first cooling channel 121 and the second cooling channel 122 and absorbs heat by phase change to dissipate heat from the battery cells. In the direct cooling plate 1 of the present application, since the refrigerant can directly absorb heat by phase change, compared with the liquid cooling heat dissipation in the prior art, the plate heat exchanger and components such as the electronic water pump and the coolant kettle can be reduced, so as to realize the lightweight of the whole vehicle and reduce the cost of the whole vehicle; by arranging the first buffer channel 131 and the second buffer channel 132, the coolant structure is connected to the first cooling channel 121 and the second cooling channel 122 respectively, and the flow resistance in the first cooling channel 121 and the second cooling channel 122 is controlled to avoid that the heat exchange efficiency of the battery cells differs too much and affects the working safety of the battery.

[0035] According to some embodiments of the utility model, a first buffer zone and a second buffer zone are formed on the plate body 11, and the first buffer zone and the second buffer zone are respectively located between the edge of the plate body 11 and the first flow channel zone and the second flow channel zone, and the first buffer zone and the second buffer zone are opposite to each other in the width direction of the plate body 11.

[0036] Specifically, a first buffer zone and a second buffer zone are provided on the plate body 11, a first buffer channel 131 is provided in the first buffer zone, and a second buffer channel 132 is provided in the second buffer zone, the coolant interface 111 is connected with the first cooling channel 121 through the first buffer channel 131, and the coolant interface 111 is connected with the second cooling channel 122 through the second buffer channel 132, and the first buffer zone and the second buffer zone are directly opposite in the width direction of the plate body 11. Since the distance between the coolant interface 111 and the first cooling channel 121 is greater than the distance between the coolant interface 111 and the second cooling channel 122, the refrigerant flow rate is balanced by providing the first buffer zone and the second buffer zone to ensure that the flow rate of the refrigerant in the first cooling channel 121 and the second cooling channel 122 is approximately the same, so that the first channel area and the second channel area have the same cooling effect on the battery cells, thereby avoiding a large temperature difference between the battery cells and affecting the safety of the battery cells.

[0037] According to some embodiments of the present invention, the number of bends of the first buffer channel 131 is greater than the number of bends of the second buffer channel 132 .

[0038] Specifically, the first buffer channel 131 and the second buffer channel 132 are of comparable length. To control the flow rate of the refrigerant, the number of bends in the first buffer channel 131 is increased to increase the flow resistance of the first buffer channel 131, thereby ensuring that the flow rate of the refrigerant in the first cooling channel 121 is substantially the same as the flow rate of the refrigerant in the second cooling channel 122, and the direct cooling plate 1 has the same cooling effect on multiple battery cells.

[0039] According to some embodiments of the present invention, a plurality of branches are formed in the first cooling channel 121, each branch having a first channel section and a second channel section respectively, the first channel section and the second channel section are connected, and the refrigerant flow direction in the first channel section is opposite to the refrigerant flow direction in the second channel section, and a plurality of branches are formed in the second cooling channel 122, each branch having a third channel section and a fourth channel section respectively, the third channel section and the fourth channel section are connected, and the refrigerant flow direction in the third channel section is opposite to the refrigerant flow direction in the fourth channel section.

[0040] like Figure 1 As shown, the first cooling channel 121 and the second cooling channel 122 have multiple branches respectively. By increasing the number of branches in the first channel area and the second channel area, the flow area of ​​the refrigerant in the direct cooling plate 1 is increased to increase the heat dissipation area of ​​the direct cooling plate 1 and improve the heat dissipation efficiency.

[0041] Among them, each branch in the first cooling channel 121 has a first channel section and a second channel section respectively, the first channel section and the second channel section are connected, and the flow direction of the refrigerant in the first channel section is opposite to the flow direction of the refrigerant in the second channel section, and the refrigerant flows from the outlet of the first channel section to the inlet of the second channel section. The refrigerant in the first channel section and the refrigerant in the second channel section form a counter-flow path, which can ensure that the refrigerant temperature in the first channel and the refrigerant temperature in the second channel section are roughly the same, thereby ensuring the overall temperature difference of the battery cell is consistent and avoiding excessive local temperature of the battery cell; since the first cooling channel 121 and the second cooling channel 122 are symmetrically arranged about the plate body 11, a third channel section and a fourth channel section are formed in the second cooling channel 122, thereby ensuring that the temperature difference between multiple battery cells is consistent and ensuring the safe use of the battery cells.

[0042] According to some embodiments of the utility model, the direct cooling plate 1 also includes a first return channel 141 and a second return channel 142, one end of the first return channel 141 is arranged at the other side edge of the plate body 11 and is connected to the first cooling channel 121, and the other end of the first return channel 141 is connected to the cooling liquid interface 111; one end of the second return channel 142 is arranged at the other side edge of the plate body 11 and is connected to the second cooling channel 122, and the other end of the second return channel 142 is connected to the cooling liquid interface 111.

[0043] Specifically, after the refrigerant passes through the first cooling channel 121 to absorb heat through phase change, it flows out from the first return channel 141. After the refrigerant passes through the second cooling channel 122 to absorb heat through phase change, it flows out from the second return channel 142. To avoid local overheating of the direct cooling plate 1 after the refrigerant absorbs heat, the first return channel 141 and the second return channel 142 are both constructed as a single-tube structure to facilitate heat dissipation.

[0044] According to some embodiments of the present invention, the number of bends of the second return flow channel 142 is less than the number of bends of the first return flow channel 141 .

[0045] Specifically, since the other end of the first return channel 141 and the other end of the second return channel 142 are respectively connected to the coolant interface 111, the distance between the first return channel 141 and the coolant interface 111 is smaller than the distance between the second return channel 142 and the coolant interface 111. Therefore, by increasing the number of bends in the first return channel 141, the refrigerant flow rate in the first return channel 141 is ensured to be the same as the refrigerant flow rate in the second return channel 142.

[0046] According to some embodiments of the present invention, the first return channel 141 and the second return channel 142 pass through both sides of the plate body 11 in the width direction, and the first return channel 141 and the second return channel 142 pass through the periphery of the first buffer zone and the periphery of the second buffer zone respectively.

[0047] Specifically, the first return channel 141 and the second return channel 142 are respectively arranged on both sides of the width direction of the plate body 11 to facilitate the outflow of the refrigerant. The first return channel 141 and the second return channel 142 pass through the periphery of the first buffer zone and the periphery of the second buffer zone respectively, saving the arrangement space of the first return channel 141 and the second return channel 142.

[0048] According to some embodiments of the present invention, the diameters of the first cooling channel 121 and the second cooling channel 122 are d and satisfy 2 mm ≤ d ≤ 13 mm.

[0049] Specifically, the direct cooling plate 1 of the present application reduces the thickness of the direct cooling plate 1 by reducing the pipe diameters of the first cooling channel 121 and the second cooling channel 122, so that the space required for the arrangement of the direct cooling plate 1 is smaller, and the heat dissipation area of ​​the direct cooling plate 1 is increased by increasing the number of branches in the first cooling channel 121 and the second cooling channel 122, thereby improving the heat dissipation efficiency.

[0050] The battery according to the utility model is briefly described below.

[0051] The battery according to the utility model includes the direct cooling plate 1 described in any one of the above embodiments. Since the battery according to the utility model includes the direct cooling plate 1 described in any one of the above embodiments, the battery heat dissipation of the present application requires fewer components, thereby reducing the battery cost, and the battery heat dissipation efficiency is high, ensuring the safety of battery use.

[0052] The vehicle according to the present utility model is briefly described below.

[0053] The vehicle according to the utility model includes the battery described in any one of the above embodiments. Since the vehicle according to the utility model includes the battery described in any one of the above embodiments, the vehicle according to the utility model has lower vehicle cost, smaller battery space, high battery heat dissipation efficiency, and better vehicle safety.

[0054] In the description of the present invention, 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 invention 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 invention.

[0055] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0056] In the description of the present invention, "plurality" means two or more.

[0057] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0058] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0059] 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.

[0060] 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 direct cooling plate for a battery, characterized in that: include: A plate body, wherein a first flow channel area and a second flow channel area are symmetrically arranged on the plate body, and a first cooling flow channel and a second cooling flow channel are respectively formed in the first flow channel area and the second flow channel area; A coolant interface, the coolant interface is arranged at the edge of the plate body and is arranged opposite to the first flow channel area; wherein A first buffer channel and a second buffer channel are formed in the plate body, respectively connecting the coolant interface with the first cooling channel and the second cooling channel, and the flow resistance of the first buffer channel is greater than the flow resistance of the second buffer channel.

2. The direct cooling plate for batteries according to claim 1, characterized in that: A first buffer zone and a second buffer zone are formed on the plate body. The first buffer zone and the second buffer zone are respectively located between the edge of the plate body and the first flow channel area and the second flow channel area. The first buffer zone and the second buffer zone are directly opposite to each other in the width direction of the plate body.

3. The direct cooling plate for batteries according to claim 2, characterized in that: The number of bends of the first buffer flow channel is greater than the number of bends of the second buffer flow channel.

4. The direct cooling plate for batteries according to claim 1, characterized in that: A plurality of branches are formed in the first cooling channel, each branch having a first channel section and a second channel section respectively, the first channel section is connected to the second channel section, and the flow direction of the refrigerant in the first channel section is opposite to that in the second channel section; a plurality of branches are formed in the second cooling channel, each branch having a third channel section and a fourth channel section respectively, the third channel section is connected to the fourth channel section, and the flow direction of the refrigerant in the third channel section is opposite to that in the fourth channel section.

5. The direct cooling plate for batteries according to claim 2, characterized in that: Also includes: A first return flow channel, one end of which is disposed at the other side edge of the plate body and communicated with the first cooling flow channel, and the other end of which is communicated with the cooling liquid interface; A second return flow channel, one end of the second return flow channel is arranged at the other side edge of the plate body and communicated with the second cooling flow channel, and the other end of the second return flow channel is communicated with the coolant interface.

6. The direct cooling plate for batteries according to claim 5, characterized in that: The number of bends of the second return flow channel is less than the number of bends of the first return flow channel.

7. The direct cooling plate for batteries according to claim 6, characterized in that: The first reflow channel and the second reflow channel pass through two sides of the plate body in a width direction respectively, and the first reflow channel and the second reflow channel pass through an outer periphery of the first buffer zone and an outer periphery of the second buffer zone respectively.

8. The direct cooling plate for batteries according to claim 1, characterized in that: The diameters of the first cooling channel and the second cooling channel are d and satisfy 2mm≤d≤13mm.

9. A battery, characterized in that: The invention comprises the direct cooling plate according to any one of claims 1 to 8.

10. A vehicle, characterized in that: A battery comprising the battery of claim 9.

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