Battery thermal management device

Abstract

The present invention relates to a battery thermal management device, comprising: at least one first liquid-cooling plate and a second liquid-cooling plate; each first liquid-cooling plate is provided with a first flow channel and a second flow channel that are independent of each other; the second liquid-cooling plate is provided with a third flow channel; the first end of the third flow channel is connected to the first flow channel through a connecting pipe, and the second end of the third flow channel is connected to the second flow channel through a connecting pipe; a plurality of first liquid-cooling plates are arranged side by side, and the second liquid-cooling plate is provided on one side of the plurality of first liquid-cooling plates; the two first flow channels provided in two adjacent first liquid-cooling plates are connected through a connecting pipe, and the two second flow channels provided in two adjacent first liquid-cooling plates are connected through a connecting pipe. In the present invention, the first liquid-cooling plate and the second liquid-cooling plate that are spatially parallel, cooperate with the relatively independent first flow channel and the second flow channel to achieve the effect of flow channel series connection through the pipes between the water-cooling plates, ensure the stability of the flow of each water-cooling plate, and help to reduce the temperature difference of the battery cells between different modules.

Description

Technical Field

[0001] The present invention relates to the technical field of battery liquid cooling and heat dissipation, and in particular to a battery thermal management device. Background Art

[0002] The suitable operating temperature range of lithium-ion power batteries is 20℃-40℃. The life of lithium batteries working at high temperatures will not only be significantly shortened, but in severe cases it may also cause thermal runaway of the battery, posing a safety risk.

[0003] Currently, liquid cooling is mainly used in the market for battery thermal management. That is, a liquid cooling plate is set in the battery pack to heat or cool the battery. However, during the cooling or heating process, the different spatial positions of the battery cells in the battery pack will cause uneven heat exchange in the battery. Summary of the Invention

[0004] Based on this, it is necessary to provide a battery thermal management device to address the problem of uneven battery heat exchange.

[0005] The present invention provides a battery thermal management device, comprising:

[0006] at least one first liquid cooling plate, each of the first liquid cooling plates being provided with a first flow channel and a second flow channel that are independent of each other; and

[0007] a second liquid cooling plate, wherein a third flow channel is provided in the second liquid cooling plate; a first end of the third flow channel is connected to the first flow channel via a connecting pipe, and a second end of the third flow channel is connected to the second flow channel via the connecting pipe;

[0008] Multiple first liquid cooling plates are arranged side by side, and the second liquid cooling plate is arranged on one side of the multiple first liquid cooling plates; the two first flow channels set in two adjacent first liquid cooling plates are connected through the connecting pipe, and the two second flow channels set in two adjacent first liquid cooling plates are connected through the connecting pipe.

[0009] In one embodiment, the first liquid cooling plate is provided with a first liquid opening and a second liquid opening, the first liquid opening is connected to both ends of the first flow channel, and the second liquid opening is connected to both ends of the second flow channel;

[0010] A third liquid port and a fourth liquid port are provided on the second liquid cooling plate, the third liquid port is connected to the first end of the third flow channel, the fourth liquid port is connected to the second end of the third flow channel, the third liquid port is connected to the first liquid port through a connecting pipe, and the fourth liquid port is connected to the second liquid port through a connecting pipe.

[0011] In one embodiment, it further includes:

[0012] a liquid inlet pipeline connected to the first liquid port on the first liquid cooling plate away from the second liquid cooling plate; and

[0013] A liquid outlet pipeline is connected to the second liquid port on the first liquid cooling plate away from the second liquid cooling plate.

[0014] In one embodiment, the liquid inlet pipeline and the liquid outlet pipeline are located on the same side of the first liquid cooling plate, and the third liquid opening and the fourth liquid opening of the third flow channel are located on the same side of the second liquid cooling plate.

[0015] In one embodiment, the liquid inlet pipeline and the liquid outlet pipeline are located on both sides of the first liquid cooling plate, and the third liquid opening and the fourth liquid opening of the third flow channel are located on both sides of the second liquid cooling plate.

[0016] In one embodiment, the liquid inlet pipeline is L-shaped; the liquid outlet pipeline is L-shaped.

[0017] In one embodiment, the first liquid cooling plate comprises:

[0018] a first lower cold plate, the first flow channel and the second flow channel being provided on the first lower cold plate; and

[0019] A first upper cold plate is mounted above the first lower cold plate; the first liquid ports are provided at both ends of the first upper cold plate, and the first liquid ports are connected to both ends of the first flow channel; the second liquid ports are provided at both ends of the first upper cold plate, and the second liquid ports are connected to both ends of the second flow channel;

[0020] The second liquid cooling plate comprises:

[0021] a second lower cold plate, the third flow channel being provided on the second lower cold plate; and

[0022] The second upper cold plate is installed above the second lower cold plate; the third liquid port and the fourth liquid port are arranged on the second upper cold plate, and the third liquid port is connected to the first liquid port through a connecting pipe, and the fourth liquid port is connected to the second liquid port through a connecting pipe.

[0023] In one embodiment, the connecting pipeline is U-shaped.

[0024] In one embodiment, the first flow channel and the second flow channel are symmetrically arranged on the first liquid cooling plate.

[0025] In one embodiment, the first flow channel includes: at least one first sub-flow channel, and a plurality of the first sub-flow channels are arranged side by side and interconnected; the second flow channel includes: at least one second sub-flow channel, and a plurality of the second sub-flow channels are arranged side by side and interconnected.

[0026] In the present invention, the first liquid cooling plate and the second liquid cooling plate are spatially parallel, and the relatively independent first flow channel and the second flow channel provided on the first liquid cooling plate are coordinated to achieve the effect of flow channel series connection through the pipeline between the water cooling plates, thereby ensuring the flow stability of each water cooling plate and facilitating the reduction of the temperature difference of the battery cells between different modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 1. A schematic front view of the structure of a battery thermal management device according to a first embodiment of the present invention is shown;

[0028] Figure 2 A rear structural diagram of a battery thermal management device provided by a first embodiment of the present invention is shown;

[0029] Figure 3 Shown Figure 1 Structural diagram of the first lower cold plate;

[0030] Figure 4 Shown Figure 1 Schematic diagram of the structure of the first upper cold plate;

[0031] Figure 5 Shown Figure 1 Structural diagram of the second lower cold plate;

[0032] Figure 6 Shown Figure 1 Structural diagram of the second upper cold plate;

[0033] Figure 7 Shown Figure 1 Schematic diagram of the structure of the connecting pipeline;

[0034] Figure 8 Shown Figure 1 Schematic diagram of the structure of the liquid outlet pipeline;

[0035] Figure 9 Shown Figure 1 Schematic diagram of the structure of the liquid inlet pipeline;

[0036] Figure 10 1. A schematic front view of the structure of a battery thermal management device provided by a second embodiment of the present invention is shown;

[0037] Figure 11 A rear structural diagram of a battery thermal management device provided by a second embodiment of the present invention is shown;

[0038] Figure 12 1. A schematic front view of the structure of a battery thermal management device provided by a third embodiment of the present invention is shown;

[0039] Figure 13 A rear structural diagram of a battery thermal management device provided by a third embodiment of the present invention is shown;

[0040] Figure 14 1. A schematic front view of the structure of a battery thermal management device provided by a fourth embodiment of the present invention is shown;

[0041] Figure 15 A rear structural diagram of a battery thermal management device provided by a fourth embodiment of the present invention is shown.

[0042] Figure Number:

[0043] 1000-first liquid cooling plate;

[0044] 1100-first lower cold plate;

[0045] 1110-first flow channel;

[0046] 1111-first sub-flow channel;

[0047] 1120-second flow channel;

[0048] 1121-second sub-flow channel;

[0049] 1200-first upper cold plate;

[0050] 1210-first liquid port;

[0051] 1220-second liquid port;

[0052] 2000-second liquid cooling plate;

[0053] 2100-second lower cold plate;

[0054] 2110-third flow channel;

[0055] 2200-second upper cold plate;

[0056] 2210-the third liquid port;

[0057] 2220-fourth liquid port;

[0058] 3000-connecting pipes;

[0059] 4000-liquid inlet pipeline;

[0060] 5000-Liquid outlet pipe. DETAILED DESCRIPTION

[0061] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0062] 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 to 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, 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 should not be understood as limiting the present invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0064] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0067] Currently, mainstream battery thermal management devices on the market generally utilize liquid cooling, air cooling, and direct cooling. Liquid cooling holds a commanding position in the market. This approach utilizes a water-cooling plate within the battery panel, creating indirect physical contact between the plate and the battery cells to achieve heating or cooling. Due to the spatial structure of the battery pack, the cells within the pack are typically divided into multiple modules, and the resulting battery thermal management system is then divided into multiple parallel branches.

[0068] However, the current multi-parallel branch layout used in battery thermal management devices generally uses a main line. The coolant flows from the main line through each parallel water-cooling plate and then back to the main line, forming a liquid cooling circuit. This arrangement causes the flow rate through each water-cooling plate to vary due to the different spatial locations of the water-cooling plates and the presence of cooling liquid drop, thereby increasing the temperature difference between the battery cells and causing uneven flow in each parallel branch.

[0069] In view of the above problems, the present invention provides a battery thermal management device, see Figure 1 and Figure 2 , Figure 1 FIG2 shows a front view of the structure of a battery thermal management device provided by the first embodiment of the present invention. Figure 2 A rear structural diagram of a battery thermal management device provided by a first embodiment of the present invention is shown.

[0070] One embodiment of the present invention provides a battery thermal management device, comprising: at least one first liquid cooling plate 1000 and a second liquid cooling plate 2000. Each first liquid cooling plate 1000 is provided with a first flow channel 1110 and a second flow channel 1120, each of which is independent of each other; and each second liquid cooling plate 2000 is provided with a third flow channel 2110. The first end of the third flow channel 2110 is connected to the first flow channel 1110 via a connecting pipe, and the second end of the third flow channel 2110 is connected to the second flow channel 1120 via a connecting pipe.

[0071] refer to Figure 1As shown, multiple first liquid cooling plates 1000 are arranged side by side from right to left, and a second liquid cooling plate 2000 is positioned to the left of the leftmost first liquid cooling plate 1000. The two first flow channels 1110 provided in two adjacent first liquid cooling plates 1000 are connected via a connecting pipe. The two second flow channels 1120 provided in two adjacent first liquid cooling plates 1000 are also connected via a connecting pipe.

[0072] It should be noted that when the first flow channel 1110 is used as a liquid inlet flow channel, the second flow channel 1120 can be used as a liquid outlet flow channel. Conversely, when the second flow channel 1120 is used as a liquid inlet flow channel, the first flow channel 1110 can be used as a liquid outlet flow channel. The structure of the connecting pipeline used to connect the first flow channel and the second flow channel may not be specifically limited, such as a U-shaped tubular structure, or other pipe shapes that can achieve flow channel connection can be applicable. Taking the first flow channel 1110 as the liquid inlet flow channel as an example, the coolant flows into the first flow channel 1110 in the rightmost one of the multiple first liquid cooling plates 1000. The coolant then flows through the connecting pipe 3000 into the first flow channel 1110 in the next first liquid cooling plate 1000, and repeats this process until it flows into the first flow channel 1110 in the leftmost of the multiple first liquid cooling plates 1000. The coolant is then connected to one end of the third flow channel 2110 in the second liquid cooling plate 2000 through the connecting pipe 3000. The coolant flows into the third flow channel 2110 and flows out from the other end of the third flow channel 2110 to the second flow channel 1120 of the adjacent first liquid cooling plate 1000. The liquid inflow process is repeated until the coolant flows into the second flow channel 1120 in the rightmost of the multiple first liquid cooling plates 1000, completing the liquid outflow process. It should be noted that the liquid cooling plate can pass low-temperature / high-temperature coolant to cool / reduce the temperature of the battery. When the battery is at a high temperature and needs to be cooled, the inlet coolant temperature is the lowest and the outlet coolant temperature is the highest. When the battery is at a low temperature and needs to be heated, the inlet coolant temperature is the highest and the outlet coolant temperature is the lowest.

[0073] In this embodiment, no main flow line is provided, achieving parallel flow between the liquid cooling plates and serial flow between the flow channels, thereby reducing the temperature difference between the battery cells in each liquid cooling plate. The first liquid cooling plate 1000 has independent first flow channels 1110 and second flow channels 1120, with one side flowing a relatively low-temperature inlet coolant and the other side flowing a relatively high-temperature outlet coolant. The two sides are not connected to each other, which can greatly reduce the temperature difference between the battery cells in each liquid cooling plate.

[0074] refer to Figure 1As shown, taking high-temperature battery cooling as an example, the coolant temperature at the battery inlet is 22°C. The minimum and maximum coolant temperatures corresponding to the independent first flow channel 1110 and second flow channel 1120 on the first first water-cooling plate 1000 from the right are 27.5°C and 22°C, respectively, with an average temperature of 24.75°C. The minimum and maximum coolant temperatures corresponding to the independent first flow channel 1110 and second flow channel 1120 on the second first water-cooling plate 1000 from the right are 27°C and 22.5°C, respectively, with an average temperature of 24.75°C. The minimum and maximum coolant temperatures corresponding to the independent first flow channel 1110 and second flow channel 1120 on the third first water-cooling plate 1000 from the right are 26.5°C and 23°C, respectively, with an average temperature of 24.75°C. The minimum and maximum coolant temperatures corresponding to the independent first flow channel 1110 and second flow channel 1120 on the fourth first water-cooled plate 1000 from the right are 26°C and 23.5°C, respectively, with an average temperature of 24.75°C. The minimum and maximum coolant temperatures corresponding to the independent first flow channel 1110 and second flow channel 1120 on the fifth first water-cooled plate 1000 from the right are 25.5°C and 24°C, respectively, with an average temperature of 24.75°C. This arrangement allows the flow channels with the lowest and highest coolant temperatures at corresponding positions to be arranged on the same first water-cooled plate 1000, thereby greatly improving the consistency of the average temperatures between the various first water-cooled plates 1000. In addition, since the coolant in the different first water-cooled plates 1000 and second water-cooled plates 2000 flows in series, the coolant flow rate is completely consistent, which ensures that the heat exchange differences between the different water-cooled plates can be greatly reduced, that is, the battery temperature difference between the water-cooled plates can be greatly reduced.

[0075] With respect to the two independent flow channels inside the water-cooling plate, heat exchange occurs during the circulation of the coolant. The temperature difference of the coolant along the direction in which the water-cooling plate is arranged is further reduced, which can greatly reduce the temperature difference of the batteries in the battery thermal management device.

[0076] Figure 3 Shown Figure 1 Schematic diagram of the structure of the first lower cold plate. Figure 4 Shown Figure 1 Schematic diagram of the structure of the first upper cold plate. Figure 3 、 Figure 4 As shown, the structure of the first liquid cooling plate 1000 is introduced in detail.

[0077] The first liquid cooling plate 1000 involved in this embodiment includes: a first lower cooling plate 1100 and a first upper cooling plate 1200 installed above the first lower cooling plate 1100 .

[0078] Furthermore, the first flow channel 1110 and the second flow channel 1120 are provided on the first lower cold plate 1100. The first liquid opening 1210 is provided at both ends of the first upper cold plate 1200, and the first liquid opening 1210 is connected to both ends of the first flow channel 1110. The second liquid opening 1220 is provided at both ends of the first upper cold plate 1200, and the second liquid opening 1220 is connected to both ends of the second flow channel 1120.

[0079] The first flow channel 1110 and the second flow channel 1120 are symmetrically arranged on the first liquid cooling plate 1000, which facilitates uniform liquid flow through the first flow channel 1110 and the second flow channel 1120. Furthermore, the area occupied by the first flow channel 1110 and the second flow channel 1120 on the first liquid cooling plate 1000 are the same.

[0080] The structure of the first flow channel 1110 specifically includes: at least one first sub-flow channel 1111 , and a plurality of first sub-flow channels 1111 are arranged side by side and interconnected, which is beneficial to uniformly increase the layout area of ​​the first flow channel 1110 .

[0081] The structure of the second flow channel 1120 specifically includes: at least one second sub-flow channel 1121 , and a plurality of second sub-flow channels 1121 are arranged side by side and interconnected, which is conducive to uniformly increasing the layout area of ​​the second flow channel 1120 .

[0082] Figure 5 Shown Figure 1 Schematic diagram of the structure of the second lower cold plate. Figure 6 Shown Figure 1 Schematic diagram of the structure of the second upper cold plate. Figure 5 、 Figure 6 As shown, the structure of the second liquid cooling plate 2000 is introduced in detail.

[0083] The second liquid cooling plate 2000 involved in this embodiment includes: a second lower cooling plate 2100 and a second upper cooling plate 2200 installed above the second lower cooling plate 2100 .

[0084] Furthermore, the third flow channel 2110 is provided on the second lower cold plate 2100. The third liquid port 2210 and the fourth liquid port 2220 are provided on the second upper cold plate 2200, and the third liquid port 2210 is connected to the first liquid port 1210 via a connecting pipe, and the fourth liquid port 2220 is connected to the second liquid port 1220 via a connecting pipe.

[0085] In this embodiment, the liquid inlet pipeline 4000 and the liquid outlet pipeline 5000 are arranged on both sides of a first liquid cooling plate 1000 located away from the second liquid cooling plate 2000. The corresponding third flow channel 2110 selects an S-shaped flow channel, and the third liquid port 2210 and the fourth liquid port 2220 of the third flow channel 2110 are located on both sides of the diagonal of the second liquid cooling plate 2000. It should be noted that as the flow channel stroke of the third flow channel 2110 is adjusted, that is, the three-stroke S-shaped flow channel selected by the third flow channel 2110 is adjusted to a two-stroke U-shaped flow channel, the relative positions of the third liquid port 2210 and the fourth liquid port 2220 are also adaptively adjusted, and are not limited to those shown in the figure. Therefore, the liquid inlet pipeline 4000 and the liquid outlet pipeline 5000 of the battery pack can be flexibly arranged on the same side or on both sides of the first liquid cooling plate 1000.

[0086] In an alternative embodiment, when the first flow channel 1110 serves as the liquid inlet channel and the second flow channel 1120 serves as the liquid outlet channel, the liquid inlet pipeline 4000 is connected to the first liquid port 1210 on the first flow channel 1110 of the rightmost first liquid cooling plate 1000 (i.e., the first liquid cooling plate 1000 away from the second liquid cooling plate 2000), and the liquid outlet pipeline 5000 is connected to the second flow channel 1120 on the second flow channel 1120 of the rightmost first liquid cooling plate 1000 (i.e., the first liquid cooling plate 1000 away from the second liquid cooling plate 2000). The third liquid port 2210, serving as the liquid inlet of the third flow channel 2110, is connected to the first liquid port 1210 via a connecting pipeline. The fourth liquid port 2220, serving as the liquid outlet of the third flow channel 2110, is connected to the second liquid port 1220 via a connecting pipeline.

[0087] In an alternative embodiment, when the first flow channel 1110 serves as the liquid outlet channel and the second flow channel 1120 serves as the liquid inlet channel, the liquid inlet pipeline 4000 is connected to the second flow channel 1120 of the rightmost first liquid cooling plate 1000 (i.e., the first liquid cooling plate 1000 away from the second liquid cooling plate 2000), and the liquid outlet pipeline 5000 is connected to the first liquid opening 1210 of the first flow channel 1110 of the rightmost first liquid cooling plate 1000 (i.e., the first liquid cooling plate 1000 away from the second liquid cooling plate 2000). The third liquid opening 2210, serving as the liquid outlet of the third flow channel 2110, is connected to the first liquid opening 1210 via a connecting pipeline. The fourth liquid opening 2220, serving as the liquid inlet of the third flow channel 2110, is connected to the second liquid opening 1220 via a connecting pipeline.

[0088] See Figure 7 As shown, Figure 7 Shown Figure 1Schematic diagram of the connecting pipeline structure. Regarding the shape of the connecting pipeline involved in this embodiment, a U-shaped flow channel can be selected. However, other pipeline structures that can connect the first flow channels 1110 on adjacent first liquid cooling plates 1000, the second flow channels 1120 on adjacent first liquid cooling plates 1000, the first flow channel 1110 and the third flow channel 2110, and the second flow channel 1120 and the third flow channel 2110 are also available and are not listed here one by one.

[0089] See Figure 8 As shown, Figure 8 Shown Figure 1 Schematic diagram of the structure of the liquid outlet pipeline. Regarding the shape of the liquid outlet pipeline 5000 involved in this embodiment, an L-shaped flow channel can be selected, but other pipeline structures that can connect the liquid outlet pipeline 5000 with the first liquid port 1210 and the second liquid port 1220 can be selected, and they are not listed here one by one.

[0090] See Figure 9 As shown, Figure 9 Shown Figure 1 Schematic diagram of the structure of the liquid inlet pipeline. Regarding the shape of the liquid inlet pipeline 4000 involved in this embodiment, an L-shaped flow channel can be selected, but other pipeline structures that can connect the liquid inlet pipeline 4000 with the first liquid port 1210 and the second liquid port 1220 can be selected, and they are not listed here one by one.

[0091] See Figure 10 、 Figure 11 As shown, Figure 10 FIG2 shows a front view of a battery thermal management device according to a second embodiment of the present invention. Figure 11 FIG2 shows a rear structural schematic diagram of a battery thermal management device provided by a second embodiment of the present invention.

[0092] The battery thermal management device provided in the second embodiment of the present invention differs from the battery thermal management device provided in the first embodiment in that the liquid inlet pipe 4000 and the liquid outlet pipe 5000 are located on the same side of the first liquid cooling plate 1000. In this embodiment, the third flow channel 2110 is a U-shaped flow channel, and the third liquid port 2210 and the fourth liquid port 2220 of the third flow channel 2110 are located on the same side of the second liquid cooling plate 2000. Figure 11 As shown, the cooling liquid in the first flow channel 1110 and the second flow channel 1120 on the first liquid cooling plate 1000 flows in opposite directions.

[0093] For the purpose of brief description, any description of technical features in the first embodiment that can be used in the same application are combined here and the same description will not be repeated here.

[0094] See Figure 12 、 Figure 13 As shown, Figure 12FIG2 shows a front view of a battery thermal management device according to a third embodiment of the present invention. Figure 13 A rear structural diagram of a battery thermal management device provided by a third embodiment of the present invention is shown.

[0095] The battery thermal management device provided in the third embodiment of the present invention differs from the battery thermal management device provided in the first embodiment in that only one first liquid cooling plate 1000 is arranged, and the mutually independent first flow channel 1110 and second flow channel 1120 provided in the first liquid cooling plate 1000 are respectively connected to the two ends of the third flow channel 2110 provided in the second liquid cooling plate 2000 through connecting pipes.

[0096] For the purpose of brief description, any description of technical features in the first embodiment that can be used in the same application are combined here and the same description will not be repeated here.

[0097] See Figure 14 、 Figure 15 As shown, Figure 14 FIG2 shows a front view of a battery thermal management device according to a fourth embodiment of the present invention. Figure 15 A rear structural diagram of a battery thermal management device provided by a fourth embodiment of the present invention is shown.

[0098] The battery thermal management device provided in the fourth embodiment of the present invention differs from the battery thermal management device provided in the third embodiment of the present invention in that the liquid inlet pipeline 4000 and the liquid outlet pipeline 5000 are located on the same side of the first liquid cooling plate 1000. In this embodiment, the third flow channel 2110 is a U-shaped flow channel, and the third liquid port 2210 and the fourth liquid port 2220 of the third flow channel 2110 are located on the same side of the second liquid cooling plate 2000.

[0099] For the purpose of brief description, any description of technical features in the third embodiment that can be used in the same application is combined here and the same description will not be repeated here.

[0100] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A battery thermal management device, characterized in that: include: at least one first liquid cooling plate (1000), each first liquid cooling plate (1000) being provided with a mutually independent first flow channel (1110) and a second flow channel (1120); and a second liquid cooling plate (2000), wherein a third flow channel (2110) is provided in the second liquid cooling plate (2000); a first end of the third flow channel (2110) is connected to the first flow channel (1110) via a connecting pipe (3000), and a second end of the third flow channel (2110) is connected to the second flow channel (1120) via the connecting pipe (3000); A plurality of first liquid cooling plates (1000) are arranged side by side, and a second liquid cooling plate (2000) is provided on one side of the plurality of first liquid cooling plates (1000); two first flow channels (1110) provided in two adjacent first liquid cooling plates (1000) are connected via the connecting pipe (3000), and two second flow channels (1120) provided in two adjacent first liquid cooling plates (1000) are connected via the connecting pipe (3000); The first liquid cooling plate (1000) and the second liquid cooling plate (2000) are connected in parallel to each other, and the first flow channel (1110), the second flow channel (1120) and the third flow channel (2110) are connected in series to each other.

2. The battery thermal management device according to claim 1, characterized in that: The first liquid cooling plate (1000) is provided with a first liquid opening (1210) and a second liquid opening (1220), the first liquid opening (1210) being in communication with both ends of the first flow channel (1110), and the second liquid opening (1220) being in communication with both ends of the second flow channel (1120); The second liquid cooling plate (2000) is provided with a third liquid port (2210) and a fourth liquid port (2220), the third liquid port (2210) is connected to the first end of the third flow channel (2110), the fourth liquid port (2220) is connected to the second end of the third flow channel (2110), the third liquid port (2210) is connected to the first liquid port (1210) through a connecting pipe (3000), and the fourth liquid port (2220) is connected to the second liquid port (1220) through a connecting pipe (3000).

3. The battery thermal management device according to claim 2, characterized in that: Also includes: a liquid inlet pipeline (4000), the liquid inlet pipeline (4000) being connected to the first liquid port (1210) on the first liquid cooling plate (1000) away from the second liquid cooling plate (2000); as well as A liquid outlet pipeline (5000), the liquid outlet pipeline (5000) being connected to the second liquid outlet (1220) on the first liquid cooling plate (1000) away from the second liquid cooling plate (2000).

4. The battery thermal management device according to claim 3, characterized in that: The liquid inlet pipeline (4000) and the liquid outlet pipeline (5000) are located on the same side of the first liquid cooling plate (1000), and the third liquid outlet (2210) and the fourth liquid outlet (2220) of the third flow channel (2110) are located on the same side of the second liquid cooling plate (2000).

5. The battery thermal management device according to claim 3, characterized in that: The liquid inlet pipeline (4000) and the liquid outlet pipeline (5000) are located on both sides of the first liquid cooling plate (1000), and the third liquid outlet (2210) and the fourth liquid outlet (2220) of the third flow channel (2110) are located on both sides of the second liquid cooling plate (2000).

6. The battery thermal management device according to claim 3, characterized in that: The liquid inlet pipeline (4000) is L-shaped; the liquid outlet pipeline (5000) is L-shaped.

7. The battery thermal management device according to claim 2, characterized in that: The first liquid cooling plate (1000) comprises: a first lower cold plate (1100), the first flow channel (1110) and the second flow channel (1120) being arranged on the first lower cold plate (1100); and A first upper cold plate (1200) is installed above the first lower cold plate (1100); the first liquid port (1210) is provided at both ends of the first upper cold plate (1200), and the first liquid port (1210) is communicated with both ends of the first flow channel (1110); the second liquid port (1220) is provided at both ends of the first upper cold plate (1200), and the second liquid port (1220) is communicated with both ends of the second flow channel (1120); The second liquid cooling plate (2000) comprises: a second lower cold plate (2100), the third flow channel (2110) being provided on the second lower cold plate (2100); and The second upper cold plate (2200) is installed above the second lower cold plate (2100); the third liquid port (2210) and the fourth liquid port (2220) are arranged on the second upper cold plate (2200), and the third liquid port (2210) is connected to the first liquid port (1210) through a connecting pipe (3000), and the fourth liquid port (2220) is connected to the second liquid port (1220) through a connecting pipe (3000).

8. The battery thermal management device according to any one of claims 1 to 7, characterized in that: The connecting pipeline (3000) is U-shaped.

9. The battery thermal management device according to any one of claims 1 to 7, characterized in that: The first flow channel (1110) and the second flow channel (1120) are symmetrically arranged on the first liquid cooling plate (1000).

10. The battery thermal management device according to any one of claims 1 to 7, characterized in that: The first flow channel (1110) includes: at least one first sub-flow channel (1111), and a plurality of the first sub-flow channels (1111) are arranged side by side and interconnected; the second flow channel (1120) includes: at least one second sub-flow channel (1121), and a plurality of the second sub-flow channels (1121) are arranged side by side and interconnected.

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