Liquid cooling assembly and battery pack

Abstract

The utility model provides a liquid cooling assembly and a battery pack, and relates to the field of new energy automobiles. The liquid cooling assembly comprises a liquid cooling unit, a first liquid collecting pipe, a second liquid collecting pipe, a first flow guide pipe and a second flow guide pipe, the liquid cooling unit is provided with a plurality of liquid cooling flow channels extending in the preset direction, each liquid cooling flow channel is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are spaced from the two ends of the liquid cooling flow channel; the first liquid collecting pipe is communicated with all the liquid inlets, and the second liquid collecting pipe is communicated with all the liquid outlets; the first flow guide pipe is communicated with the first liquid collecting pipe, and the second liquid guide pipe is communicated with the second liquid collecting pipe. According to the liquid cooling assembly, the liquid inlet and the liquid outlet are formed between the two ends of the liquid cooling channel, and the flowing path of the cooling liquid in the liquid cooling channel is changed, so that the cooling effect of the battery cells located in the middle area of the battery pack in the preset direction is stronger than that of the battery cells located at the two ends of the battery, and the temperature difference of different positions in the battery pack is reduced; and the uniformity of the temperature in the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicles, and in particular to a liquid cooling component and a battery pack. Background Art

[0002] In the power battery industry, new energy vehicle battery packs often use liquid cooling for thermal management, and the liquid collecting pipe of the liquid cooling system of the battery pack is generally set at the end of the liquid cooling plate. However, since the heat released by the battery cells located in the middle area of ​​the battery pack is greater than the heat released by the battery cells located at both ends of the battery pack, the battery pack has an uneven temperature problem. Utility Model Content

[0003] The utility model aims to provide a liquid cooling assembly and a battery pack, which can reduce the temperature difference at different positions in the battery pack by changing the flow path of the coolant in the liquid cooling channel, thereby improving the uniformity of the temperature in the battery pack.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In a first aspect, the utility model provides a liquid cooling assembly, the liquid cooling assembly comprising a liquid cooling unit, a first liquid collecting pipe, a second liquid collecting pipe, a first flow guiding pipe and a second flow guiding pipe;

[0006] The liquid cooling unit is provided with a plurality of liquid cooling channels extending in a preset direction, each of which is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are spaced from both ends of the liquid cooling channel;

[0007] The first liquid collecting pipe is connected to all the liquid inlets, and the second liquid collecting pipe is connected to all the liquid outlets;

[0008] The first flow guide pipe is communicated with the first liquid collecting pipe, and the second flow guide pipe is communicated with the second liquid collecting pipe.

[0009] In an optional embodiment, the first collecting pipe and the second collecting pipe are arranged in parallel and at intervals, and the extension direction of the first collecting pipe is perpendicular to the preset direction.

[0010] In an optional embodiment, the liquid inlet and the liquid outlet are both located in the middle of the liquid cooling channel;

[0011] The first collecting pipe and the second collecting pipe are both located in the middle of the liquid cooling channel.

[0012] In an optional embodiment, the liquid cooling unit includes a plurality of liquid cooling components, and the plurality of liquid cooling components are arranged in parallel and at intervals along a vertical direction of a preset direction, and each liquid cooling component is correspondingly provided with at least one liquid cooling channel.

[0013] In an optional embodiment, each liquid cooling component is provided with a first curved portion and a second curved portion extending and bending toward one side of the collecting pipe, and the liquid inlet and the liquid outlet are respectively provided in the first curved portion and the second curved portion.

[0014] In an optional embodiment, the first flow guide pipe includes a first pipe and a first joint, the first pipe is connected to the first joint, and the first pipe is connected to the first liquid collecting pipe;

[0015] The second flow guide pipe comprises a second pipeline and a second joint, the second pipeline is communicated with the second joint, and the second pipeline is communicated with the second liquid collecting pipe;

[0016] The first joint and the second joint are located at the same end of the liquid cooling unit.

[0017] In a second aspect, the utility model provides a battery pack, the battery pack comprising a housing, a battery cell module and the aforementioned liquid cooling assembly;

[0018] The battery cell module and the liquid cooling assembly are both located in the shell, and the battery cell module and the liquid cooling assembly are both connected to the shell.

[0019] In an optional embodiment, the battery pack further comprises a crossbeam connected to the housing;

[0020] The battery cell module includes two battery cell units, and the crossbeam includes a first side surface and a second side surface opposite to each other, and the first side surface and the second side surface are respectively abutted against the two battery cell units;

[0021] The cross beam is provided with a first limiting groove and a second limiting groove. The first collecting pipe is accommodated in the first limiting groove, and the second collecting pipe is accommodated in the second limiting groove.

[0022] In an optional embodiment, the distance between the first side surface and the second side surface gradually decreases along the direction of the cross beam toward the liquid cooling assembly.

[0023] In an optional embodiment, the housing includes a connecting assembly, and the liquid cooling assembly is located between the battery cell module and the connecting assembly;

[0024] The connecting assembly includes a plurality of first connecting plates and a plurality of second connecting plates, each of the first connecting plates is connected to the crossbeam, the plurality of first connecting plates and the plurality of second connecting plates are arranged in parallel and at intervals along the extension direction of the crossbeam, and each first connecting plate is located between two second connecting plates.

[0025] The beneficial effects of the embodiments of the utility model are:

[0026] The liquid cooling component includes a liquid cooling unit, a first collecting pipe, a second collecting pipe, and a first and a second guide pipe; the liquid cooling unit is configured with a plurality of liquid cooling channels extending along a preset direction, each liquid cooling channel is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both spaced apart from the two ends of the liquid cooling channel; the first collecting pipe is connected to all the liquid inlets, and the second collecting pipe is connected to all the liquid outlets; the first guide pipe is connected to the first collecting pipe, and the second guide pipe is connected to the second collecting pipe.

[0027] The liquid cooling component changes the flow path of the coolant in the liquid cooling channel by arranging the liquid inlet and the liquid outlet between the two ends of the liquid cooling channel, thereby improving the cooling effect of the battery cells located in the middle area of ​​the battery pack in a preset direction, making the cooling effect stronger than the cooling effect of the battery cells located at the two ends of the battery in the preset direction, thereby reducing the temperature difference at different positions in the battery pack and further improving the temperature uniformity in the battery pack.

[0028] The battery pack includes a shell, a battery cell module and the above-mentioned liquid cooling assembly; the battery cell module and the liquid cooling assembly are both located in the shell, and the battery cell module and the liquid cooling assembly are both connected to the shell.

[0029] The battery pack has all the beneficial effects of the above-mentioned liquid cooling assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is an exploded view of the battery pack in the embodiment of the present utility model;

[0032] Figure 2 This is a schematic structural diagram of a liquid cooling plate from a first perspective in an embodiment of the utility model;

[0033] Figure 3 This is a structural schematic diagram of the liquid cooling plate from a second viewing angle in an embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the liquid flow direction in the liquid cooling assembly in an embodiment of the utility model;

[0035] Figure 5 This is a schematic diagram of the structure of the liquid cooling unit in the embodiment of the utility model;

[0036] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0037] Figure 7 This is an exploded view of the crossbeam and the battery cell unit from a first viewing angle in an embodiment of the utility model;

[0038] Figure 8 This is an exploded view of the crossbeam and the battery cell unit from a second viewing angle in an embodiment of the utility model;

[0039] Fig. 9 This is a structural schematic diagram of the crossbeam and the battery cell module from a first viewing angle in an embodiment of the utility model;

[0040] Fig.10 This is a structural schematic diagram of the crossbeam and the battery cell module from a second viewing angle in an embodiment of the utility model;

[0041] Fig.11 It is a structural schematic diagram of the crossbeam and the battery core module from a third viewing angle in an embodiment of the utility model;

[0042] Fig.12 This is a structural schematic diagram of the crossbeam in the first perspective of the embodiment of the utility model;

[0043] Fig.13 This is a structural schematic diagram of the second viewing angle of the crossbeam in the embodiment of the utility model;

[0044] Fig.14 This is a structural schematic diagram of the crossbeam in the embodiment of the utility model from a third viewing angle;

[0045] Fig.15 This is a schematic diagram of the structure of the crossbeam and the liquid cooling assembly in the embodiment of the utility model;

[0046] Fig.16 for Fig.15 A partial enlarged view of point B in the middle;

[0047] Fig.17 It is an exploded view of the crossbeam and the shell in the embodiment of the utility model.

[0048] Icons: 100-battery pack; 110-housing; 120-cell module; 130-liquid cooling assembly; 150-crossbeam; 160-bolt; 111-first housing; 112-second housing; 113-connection assembly; 114-first connection plate; 115-second connection plate; 116-partitioning bar; 121-cell unit; 122-sheet metal; 123-T-beam; 131-liquid cooling unit; 132-first liquid collector; 133-second liquid collector Tube; 134-first guide tube; 135-second guide tube; 136-liquid inlet; 137-liquid outlet; 138-liquid cooling part; 139-first bending part; 141-second bending part; 142-first pipeline; 143-first joint; 144-second pipeline; 145-second joint; 151-first side surface; 152-second side surface; 153-first limiting groove; 154-second limiting groove; 155-dispatch groove; 156-avoidance groove. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a connection between the middle areas 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.

[0055] In the power battery industry, new energy vehicle battery packs often use liquid cooling for thermal management. In the liquid cooling system, the liquid cooling unit in the middle area of ​​the battery pack and the flange joint on the shell are generally connected by quick-insert pipes, and the collecting pipe is set at the end of the liquid cooling unit. However, this connection direction will cause uneven temperature of the battery pack.

[0056] Based on this, please refer to Figure 1-Figure 17 , this embodiment provides a liquid cooling assembly 130 and a battery pack 100, which can effectively improve the above technical problems.

[0057] Please refer to Figure 1-Figure 17 The front, rear, left, right, top, and bottom directions shown in the figure are relative positional relationships that can be clearly known to those skilled in the art when the battery pack 100 is placed normally. In the following content, the preset direction that appears can be understood as the front and rear direction of the battery pack 100.

[0058] Please refer to Figure 1 , Figure 1It is an exploded view of the battery pack 100 in an embodiment of the utility model; this embodiment provides a battery pack 100, which includes a shell 110, a battery cell module 120 and a liquid cooling assembly 130; the battery cell module 120 and the liquid cooling assembly 130 are both located in the shell 110, and the battery cell module 120 and the liquid cooling assembly 130 are both connected to the shell 110.

[0059] Specifically, the shell 110 includes a first shell 111 and a second shell 112, and the first shell 111 is connected to the second shell 112; the first shell 111 and the second shell 112 form a accommodating cavity, which accommodates the battery cell module 120 and the liquid cooling component 130, and the battery cell module 120 and the liquid cooling component 130 are connected to the second shell 112; wherein, the first shell 111 is located above the figure, and the second shell 112 is located below the figure; the battery cell unit 121 includes a plurality of battery cells arranged in an array, and the battery cells generate heat while generating electricity. The plurality of battery cells are in contact with the liquid cooling component 130, so that the battery cell unit 121 is cooled by the liquid cooling component 130.

[0060] The liquid cooling assembly 130 will be described in detail below:

[0061] Please refer to Figure 2-Figure 6 , Figure 2 This is a structural schematic diagram of the liquid cooling unit 131 from a first viewing angle in an embodiment of the utility model; Figure 3 It is a structural schematic diagram of the liquid cooling unit 131 from a second viewing angle in an embodiment of the utility model; Figure 4 This is a schematic diagram of the liquid flow direction in the liquid cooling assembly 130 in the embodiment of the utility model;

[0062] Figure 5 This is a schematic diagram of the structure of the liquid cooling unit 131 in the embodiment of the utility model; Figure 6 for Figure 4 A partial enlarged view of point A in the middle; the liquid cooling component 130 includes a liquid cooling unit 131, a first collecting pipe 132, a second collecting pipe 133, a first guide pipe 134 and a second guide pipe 135; the liquid cooling unit 131 is configured with a plurality of liquid cooling channels extending along a preset direction, wherein the preset direction is the front-to-back direction shown in the figure; each liquid cooling channel is provided with a liquid inlet 136 and a liquid outlet 137, and the liquid inlet 136 and the liquid outlet 137 are spaced from both ends of the liquid cooling channel; the first collecting pipe 132 is connected to all the liquid inlets 136, and the second collecting pipe 133 is connected to all the liquid outlets 137; the first guide pipe 134 is connected to the first collecting pipe 132, and the second guide pipe 135 is connected to the second collecting pipe 133.

[0063] The working principle of the liquid cooling assembly 130 is as follows:

[0064] Please refer to Figure 2-Figure 6The coolant flows into the liquid cooling assembly 130 through the first flow guide pipe 134, and the first flow guide pipe 134 transports the coolant to the first liquid collecting pipe 132. The first liquid collecting pipe 132 is connected with the liquid inlet 136 of all the liquid cooling channels on the liquid cooling unit 131, so that the coolant is transported to the liquid cooling channel from the liquid inlet 136; wherein, the coolant quickly absorbs the heat released by the battery cell by flowing in the liquid cooling channel, thereby completing the cooling of the battery; then the coolant flows out of the liquid cooling channel from the liquid outlet 137; since the second liquid collecting pipe 133 is connected with the liquid outlet 137 of all the liquid cooling channels, the coolant flows from the liquid outlet 137 to the second liquid collecting pipe 133, and then from the second liquid collecting pipe 133 to the second liquid guide pipe, thereby flowing out of the liquid cooling assembly 130. Specifically, multiple liquid cooling channels extend along a preset direction. Since the water inlet and the water outlet are arranged between the two ends of the liquid cooling channel, it can be understood that the coolant can flow through each battery cell in contact with the liquid cooling component 130 to cool each battery cell.

[0065] The liquid inlet 136 and the liquid outlet 137 are arranged at intervals, so that the liquid cooling unit 131 has a reserved space between the liquid inlet 136 and the liquid outlet 137, so that the first collecting pipe 132 and the second collecting pipe 133 will not affect each other during installation, and it is also convenient for the liquid cooling component 130 to cooperate with other structures in the subsequent installation.

[0066] In combination with the above content, the liquid cooling component 130 is used to cool the battery cells in the battery pack 100. Since the heat released by the battery cells located in the middle area of ​​the battery pack 100 is greater than the heat released by the battery cells located at both ends, the liquid cooling component 130 changes the flow path of the coolant in the liquid cooling channel by setting the liquid inlet 136 and the liquid outlet 137 between the two ends of the liquid cooling channel, so that the liquid cooling component 130 has a stronger cooling effect on the battery cells located in the middle area of ​​the battery pack 100 in a preset direction than the cooling effect on the battery cells located at both ends of the battery pack 100, thereby reducing the temperature difference at different positions in the battery pack 100, and then improving the temperature uniformity in the battery pack 100.

[0067] For further information, please refer to Figure 2-Figure 6 The first collecting pipe 132 and the second collecting pipe 133 in the liquid cooling assembly 130 are arranged in parallel and at intervals, and the extension direction of the first collecting pipe 132 is perpendicular to the preset direction; it can be understood that the first collecting pipe 132 and the second collecting pipe 133 are parallel in the left and right direction shown in the figure.

[0068] Thus, while facilitating the installation of the first collecting pipe 132 and the second collecting pipe 133, the cooling effect of the liquid cooling assembly 130 on the battery cells is more concentrated. The cooling effect on the battery cells located in the middle area of ​​the battery pack 100 in a preset direction is stronger than the cooling effect on the battery cells located at both ends of the battery pack 100, thereby reducing the temperature difference at different positions in the battery pack 100 and further improving the temperature uniformity in the battery pack 100.

[0069] In combination with the above-mentioned structural arrangement, since the heat released by the battery cells located in the middle of the battery pack 100 is the largest, by locating the liquid inlet 136 and the liquid outlet 137 in the liquid cooling assembly 130 in the middle of the liquid cooling channel, the first liquid collecting pipe 132 and the second liquid collecting pipe 133 are both located in the middle of the liquid cooling channel; the coolant can take away more heat released by the batteries located in the middle of the battery pack 100, so that the cooling effect of the battery cells located in the middle of the battery pack 100 is higher than that of the battery cells located at both ends of the battery pack 100, thereby reducing the temperature difference at different positions in the battery pack 100, and thereby improving the temperature uniformity in the battery pack 100.

[0070] For further information, please refer to Figure 2-Figure 6 The liquid cooling unit 131 includes a plurality of liquid cooling components 138 , which are arranged in parallel and at intervals along a vertical direction of a preset direction, and each liquid cooling component 138 is correspondingly provided with at least one liquid cooling channel.

[0071] Specifically, each liquid cooling component 138 includes a first liquid cooling plate and a second liquid cooling plate, and the first liquid cooling plate and the second liquid cooling plate are arranged in parallel and spaced apart along a preset direction; and the liquid cooling unit 131 also includes a first connecting member and a second connecting member, and the two ends of the first liquid cooling plate and the two ends of the second liquid cooling plate are connected respectively through the first connecting member and the second connecting member; wherein, the first connecting member is provided with a water inlet and a water outlet along the preset direction, and the water inlet and the water outlet are spaced apart from the two ends of the first connecting member.

[0072] Thus, the coolant flows into the first liquid cooling plate from the liquid inlet 136, flows through the first connecting piece, the second liquid cooling plate and the second connecting piece in sequence, and then enters the first liquid cooling plate again, and flows out of the liquid cooling circulation through the liquid outlet 137, so that the coolant flows through each battery cell in contact with the first liquid cooling plate and the second liquid cooling plate, completes the cooling of all battery cells, and makes the liquid cooling part 138 have a stronger cooling effect on the battery cells located in the middle area of ​​the battery pack 100 in a preset direction than the cooling effect on the battery cells located at both ends of the battery pack 100, thereby reducing the temperature difference at different positions in the battery pack 100, and further improving the temperature uniformity in the battery pack 100.

[0073] Combined with the above structure settings, please refer to Figure 2-Figure 6Each liquid cooling member 138 is provided with a first curved portion 139 and a second curved portion 141 that are curved and extended toward one side of the liquid collecting pipe, and the liquid inlet 136 and the liquid outlet 137 are respectively provided at the first curved portion 139 and the second curved portion 141. Specifically, the first curved portion 139 and the second curved portion 141 are curved and extended upward as shown in the figure, and the liquid inlet 136 and the liquid outlet 137 are respectively connected to the first liquid collecting pipe 132 and the second liquid collecting pipe 133, so that the liquid inlet 136 and the liquid outlet 137 are raised relative to the liquid cooling assembly 130, so as to avoid mutual influence between the first liquid collecting pipe 132 and the second liquid collecting pipe 133 and the liquid cooling member 138, thereby preventing the flow of the cooling liquid from being hindered.

[0074] As a result, the liquid cooling component 138 has a stronger cooling effect on the battery cells located in the middle area of ​​the battery pack 100 in a preset direction than on the battery cells located at both ends of the battery pack 100, thereby reducing the temperature difference at different positions in the battery pack 100 and further improving the temperature uniformity in the battery pack 100.

[0075] For further information, please refer to Figure 2-Figure 4 The first flow guide 134 includes a first pipe 142 and a first joint 143, the first pipe 142 is connected to the first joint 143, and the first pipe 142 is connected to the first liquid collecting pipe 132; the second flow guide 135 includes a second pipe 144 and a second joint 145, the second pipe 144 is connected to the second joint 145, and the second pipe 144 is connected to the second liquid collecting pipe 133; the first joint 143 and the second joint 145 are located at the same end of the liquid cooling unit 131. Specifically, the coolant flows from the first joint 143 into the first pipe 142, flows through the first liquid collecting pipe 132 through the first pipe 142, and then flows into the liquid cooling channel through the liquid inlet 136, thereby cooling the battery cell. After cooling, the coolant flows into the second liquid collecting pipe 133 from the liquid outlet 137, flows through the second pipe 144, and flows out of the liquid cooling assembly 130 from the second interface.

[0076] It should be noted that the liquid cooling component 130 is connected to the heat dissipation structure, and the two together constitute a liquid cooling circulation device. The heat dissipation structure releases the heat generated by the battery cells absorbed by the coolant in the liquid cooling component 130 to the outside, so that the coolant can flow into the liquid cooling component 130 again and cool the battery cells; setting the first interface and the second interface at the same end of the liquid cooling component 130 is more conducive to transporting the coolant to the heat dissipation structure to complete the liquid cooling cycle.

[0077] In summary, since the heat released by the battery cells located in the middle area of ​​the battery pack 100 is greater than the heat released by the battery cells located at the two ends, the liquid cooling component 130 changes the flow path of the coolant in the liquid cooling channel by setting the water inlet and the water outlet between the two ends of the liquid cooling channel. The liquid cooling component 130 has a stronger cooling effect on the battery cells located in the middle area of ​​the battery pack 100 in a preset direction than on the battery cells located at the two ends of the battery pack 100, thereby reducing the temperature difference at different positions in the battery pack 100, and further improving the uniformity of the temperature in the battery pack 100; wherein Because the heat released by the battery cells located in the middle of the battery pack 100 is the largest, the liquid inlet 136 and the liquid outlet 137 in the liquid cooling assembly 130 are both located in the middle of the liquid cooling channel, and the first collecting pipe 132 and the second collecting pipe 133 are both located in the middle of the liquid cooling channel; the coolant can take away more heat released by the batteries located in the middle of the battery pack 100, so that the cooling effect of the battery cells located in the middle is higher than that of the battery cells located at both ends, thereby reducing the temperature difference at different positions in the battery pack 100, and then improving the temperature uniformity in the battery pack 100.

[0078] Please refer to Figure 1 as well as Figure 7-Figure 16 , Figure 7 This is an exploded view of the crossbeam 150 and the battery cell unit 121 from a first perspective in an embodiment of the present invention; Figure 8 This is an exploded view of the crossbeam 150 and the battery cell unit 121 from a second viewing angle in the embodiment of the present invention; Fig. 9 It is a structural schematic diagram of the crossbeam 150 and the battery cell module 120 from a first perspective in an embodiment of the utility model; Fig.10 It is a structural schematic diagram of the crossbeam 150 and the battery cell module 120 from a second viewing angle in the embodiment of the utility model; Fig.11 It is a structural schematic diagram of the crossbeam 150 and the battery cell module 120 from a third viewing angle in the embodiment of the utility model; Fig.12 This is a structural schematic diagram of the crossbeam 150 from a first viewing angle in an embodiment of the utility model; Fig.13 This is a structural schematic diagram of the crossbeam 150 from a second viewing angle in an embodiment of the utility model; Fig.14 This is a structural schematic diagram of the crossbeam 150 from a third viewing angle in an embodiment of the utility model; Fig.15 It is a structural schematic diagram of the crossbeam 150 and the liquid cooling assembly 130 in the embodiment of the utility model; Fig.16 for Fig.11A partial enlarged view of point B in the middle; the battery pack 100 provided in this embodiment also includes a crossbeam 150, which is connected to the shell 110; the battery cell module 120 includes two battery cell units 121, and the crossbeam 150 includes a first side surface 151 and a second side surface 152 opposite to each other, and the first side surface 151 and the second side surface 152 are respectively abutted against the two battery cell units 121; the crossbeam 150 is provided with a first limiting groove 153 and a second limiting groove 154, the first collecting pipe 132 is accommodated in the first limiting groove 153, and the second collecting pipe 133 is accommodated in the second limiting groove 154.

[0079] Specifically, first, the battery cell module 120 includes two battery cell units 121 and two second sheet metals 122, each battery cell unit 121 includes a plurality of battery cells arranged in an array, and are all located between the two sheet metals 122 and respectively abut against the two sheet metals 122; wherein the two sheet metals 122 are both connected to the second shell 112.

[0080] Secondly, since the cross beam 150 is located between the two battery cell units 121, and the first side surface 151 and the second side surface 152 are respectively abutted against the two battery cell units 121, the cross beam 150 can cooperate with the two sheet metals 122 to fix the battery cells, limit the expansion of the battery cells, improve the structural reliability of the battery pack 100, and improve the battery cycle life.

[0081] In addition, since the liquid cooling assembly 130 is connected to the second shell 112, a first limiting groove 153 and a second limiting groove 154 are provided on the side of the beam 150 close to the second shell 112, and the extension direction of the beam 150 is parallel to the extension direction of the first collecting tube 132 and the second collecting tube 133, that is, the extension direction of the beam 150 and the extension direction of the first collecting tube 132 and the second collecting tube 133 are both in the left and right directions shown in the figure; the first collecting tube 132 is accommodated in the first limiting groove 153, and the second collecting tube 133 is accommodated in the second limiting groove 154, thereby protecting the first collecting tube 132 and the second collecting tube 133 and avoiding the beam 150 from being unable to be placed between the two battery cells 121 due to the provision of the first collecting tube 132 and the second collecting tube 133, thereby failing to squeeze the voltage.

[0082] Combined with the above structure settings, please continue to refer to Figure 7-Figure 16, along the direction of the cross beam 150 toward the liquid cooling assembly 130, the spacing between the first side surface 151 and the second side surface 152 gradually decreases, that is, the cross beam 150 is wedge-shaped. Specifically, the spacing below the cross beam 150 is smaller than the gap between the two battery cell units 121, so that the lower end of the cross beam 150 can be smoothly placed between the two battery cell units 121; the spacing above the cross beam 150 is larger than the gap between the two battery cell units 121, so that it can cooperate with the sheet metal 122 to squeeze the battery cells in the battery cell unit 121, fix the battery cells, and limit the expansion of the battery cells, thereby improving the structural reliability of the battery pack 100 and improving the battery cycle life.

[0083] For further information, please refer to Fig.17 , Fig.17 It is an exploded view of the beam 150 and the shell 110 in an embodiment of the utility model; the shell 110 includes a connecting component 113, and the liquid cooling component 130 is located between the battery module 120 and the connecting component 113; the connecting component 113 includes a plurality of first connecting plates 114 and a plurality of second connecting plates 115, each of the first connecting plates 114 is connected to the beam 150, and the plurality of first connecting plates 114 and the plurality of second connecting plates 115 are arranged in parallel and at intervals along the extension direction of the beam 150, and each first connecting plate 114 is located between two second connecting plates 115.

[0084] Specifically, the connecting assembly 113 is connected to the second housing 112, and the connecting assembly 113 includes a first connecting plate 114 and a second connecting plate 115, which are alternately arranged along the extending direction of the cross beam 150, i.e., the left-right direction in the figure. In this embodiment, each first connecting plate 114 is connected to the cross beam 150 by a bolt 160.

[0085] It should be noted that, combined with Figure 1 as well as Figure 11-13 At least one partition bar 116 is arranged between the adjacent first connecting plates 114 and the second connecting plates 115, and a plurality of clearance grooves 155 are arranged on one side of the crossbeam 150, which are provided with the first limiting groove 153 and the second limiting groove 154. The plurality of clearance grooves 155 correspond to the plurality of partition bars 116, and each clearance groove 155 cooperates with the corresponding partition bar 116, so that the adjacent battery cells are disconnected by the partition bar 116 to avoid the risk of creepage, and an avoidance groove 156 is arranged on the crossbeam 150, so that the crossbeam 150 can be smoothly installed between the two battery cell units 121 without causing any obstruction.

[0086] Thus, the crossbeam 150 is fixed between the two battery cell units 121 and cooperates with the sheet metal 122 to continuously squeeze the battery cell, thereby fixing the battery cell and limiting the expansion of the battery cell, thereby improving the structural reliability of the battery pack 100 and improving the battery cycle life.

[0087] Combined with the above structure settings, please refer to Figure 1 as well as Figure 11-13 The battery cell module 120 also includes a plurality of T-beams 123, at least one T-beam 123 is disposed on both sides of each battery cell, both ends of each T-beam 123 are respectively connected to two sheet metals 122, and each T-beam 123 is connected to the crossbeam 150; thereby further enhancing the squeezing effect of the crossbeam 150 and the sheet metal 122 on the battery cell unit 121, fixing the battery cell, limiting the expansion of the battery cell, improving the structural reliability of the battery pack 100, improving the beneficial effect of the battery cycle life, and disconnecting adjacent battery cells to avoid the risk of creepage.

[0088] In summary, the liquid cooling assembly 130 in the battery pack 100 changes the flow path of the coolant in the liquid cooling channel by setting the liquid inlet 136 and the liquid outlet 137 between the two ends of the liquid cooling channel, thereby improving the cooling effect of the battery cells located in the middle area of ​​the battery pack 100 in the preset direction, making it stronger than the cooling effect of the battery cells located at the two ends of the battery in the preset direction, thereby reducing the temperature difference at different positions in the battery pack 100, and further improving the uniformity of the temperature in the battery pack 100. The wedge-shaped crossbeam 150 is provided in the battery pack 100, so that after the battery cells are arranged in an array to form two battery cell units 121, the crossbeam 150 is installed in the gap between the two battery cell units 121, and the crossbeam 150 cooperates with the sheet metal 122 on both sides to squeeze the battery cells, fix the battery cells, and limit the expansion of the battery cells, thereby improving the structural reliability of the battery pack 100 and improving the battery cycle life.

[0089] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid cooling component, characterized in that: The liquid cooling assembly comprises a liquid cooling unit, a first liquid collecting pipe, a second liquid collecting pipe, a first flow guiding pipe and a second flow guiding pipe; The liquid cooling unit is provided with a plurality of liquid cooling channels extending in a preset direction, each of the liquid cooling channels is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are spaced apart from both ends of the liquid cooling channel; The first liquid collecting pipe is in communication with all the liquid inlets, and the second liquid collecting pipe is in communication with all the liquid outlets; The first flow guide pipe is communicated with the first liquid collecting pipe, and the second flow guide pipe is communicated with the second liquid collecting pipe.

2. The liquid cooling assembly according to claim 1, characterized in that: The first collecting pipe and the second collecting pipe are arranged in parallel and at intervals, and an extending direction of the first collecting pipe is perpendicular to the preset direction.

3. The liquid cooling assembly according to claim 2, characterized in that: The liquid inlet and the liquid outlet are both located in the middle of the liquid cooling channel; The first collecting pipe and the second collecting pipe are both located in the middle of the liquid cooling channel.

4. The liquid cooling assembly according to claim 1, characterized in that: The liquid cooling unit includes a plurality of liquid cooling components, which are arranged in parallel and at intervals along a direction perpendicular to the preset direction, and each of the liquid cooling components is correspondingly provided with at least one liquid cooling channel.

5. The liquid cooling assembly according to claim 4, characterized in that: Each of the liquid cooling components is provided with a first curved portion and a second curved portion extending and bending toward one side of the collecting pipe, and the liquid inlet and the liquid outlet are respectively provided at the first curved portion and the second curved portion.

6. The liquid cooling assembly according to claim 1, characterized in that: The first flow guide pipe includes a first pipeline and a first joint, the first pipeline is connected to the first joint, and the first pipeline is connected to the first liquid collecting pipe; The second flow guide pipe comprises a second pipe and a second joint, the second pipe is in communication with the second joint, and the second pipe is in communication with the second liquid collecting pipe; The first joint and the second joint are located at the same end of the liquid cooling unit.

7. A battery pack, characterized in that: The battery pack comprises a shell, a battery cell module and a liquid cooling assembly as claimed in any one of claims 1 to 6; The battery cell module and the liquid cooling assembly are both located in the shell, and the battery cell module and the liquid cooling assembly are both connected to the shell.

8. The battery pack according to claim 7, characterized in that: The battery pack further includes a crossbeam connected to the housing; The battery cell module includes two battery cell units, the crossbeam includes a first side surface and a second side surface opposite to each other, and the first side surface and the second side surface are respectively in contact with the two battery cell units; The cross beam is provided with a first limiting groove and a second limiting groove, the first liquid collecting pipe is accommodated in the first limiting groove, and the second liquid collecting pipe is accommodated in the second limiting groove.

9. The battery pack according to claim 8, characterized in that: Along the direction from the cross beam toward the liquid cooling assembly, the distance between the first side surface and the second side surface gradually decreases.

10. The battery pack according to claim 8, characterized in that: The housing includes a connecting assembly, and the liquid cooling assembly is located between the battery cell module and the connecting assembly; The connecting assembly includes a plurality of first connecting plates and a plurality of second connecting plates, each of the first connecting plates is connected to the crossbeam, the plurality of first connecting plates and the plurality of second connecting plates are arranged in parallel and at intervals along the extension direction of the crossbeam, and each of the first connecting plates is located between two of the second connecting plates.

Images