Battery pack and electric device

Abstract

The embodiment of the utility model discloses a battery pack and a power utilization device. The battery pack comprises a box body; the battery pack is accommodated in the box body, and the battery pack comprises a plurality of single batteries distributed along a second direction; each single battery is provided with a first outer wall surface, a second outer wall surface and a third outer wall surface, and the first outer wall surface, the second outer wall surface and the third outer wall surface are distributed in the circumferential direction of the single battery and are connected in pairs to form a closed surface; the first liquid cooling plate comprises a first liquid cooling part, a second liquid cooling part and a first connecting part, the first liquid cooling part and the second liquid cooling part are distributed in the second direction and connected through the first connecting part, and the first liquid cooling part and the second liquid cooling part are arranged opposite to the third outer wall surfaces of different single batteries respectively. According to the battery pack, the liquid cooling contact area between the liquid cooling plate and the single battery is increased, and the liquid cooling efficiency of the single battery is improved, so that the liquid cooling efficiency of the battery pack is improved, the temperature rise during normal working of the battery pack is reduced, and the safety performance of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] With the rapid development of the new energy industry, battery packs with high energy density, high cycle life and high safety performance have been widely used and developed, and there is an urgent need for battery packs with larger capacity, longer durability and greater safety. Safety performance is one of the core performances of battery packs. Therefore, how to improve the safety performance of battery packs has become an urgent problem to be solved. Utility Model Content

[0003] The embodiments of the present application provide a battery pack and an electrical device to improve the liquid cooling efficiency of the battery pack and improve the safety performance of the battery pack.

[0004] Improve the accuracy of touch screen linearity testing.

[0005] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0006] In one aspect, a battery pack is provided, having a first direction and a second direction intersecting each other, and the battery pack comprises:

[0007] Box;

[0008] A battery pack is housed in the box, the battery pack comprising a plurality of single cells distributed along the second direction; the single cells have a first outer wall surface, a second outer wall surface and a third outer wall surface, the first outer wall surface, the second outer wall surface and the third outer wall surface are distributed along the outer surface of the single cells and are connected in pairs to form a closed surface, the first outer wall surface, the second outer wall surface and the third outer wall surface are arranged at an angle in pairs, and the angle formed by at least two of the first outer wall surface, the second outer wall surface and the third outer wall surface is an acute angle; and

[0009] The first liquid cooling plate comprises a first liquid cooling part, a second liquid cooling part and a first connecting part, the first liquid cooling part and the second liquid cooling part are distributed along the second direction and connected by the first connecting part, the first liquid cooling part and the second liquid cooling part are both arranged obliquely relative to the second direction, and ends of the first liquid cooling part and the second liquid cooling part that are away from each other in the second direction are located on the same side of the first connecting part in the first direction, the first liquid cooling part is arranged opposite to the third outer wall surface of one of the single cells, and the second liquid cooling part is arranged opposite to the third outer wall surface of another of the single cells.

[0010] In addition to or as an alternative to one or more of the features disclosed above, the invention further includes: a second liquid cooling plate, which is arranged on one side of the battery pack, and the second liquid cooling plate includes: a third liquid cooling part and a fourth liquid cooling part, the third liquid cooling part extends along the second direction, the fourth liquid cooling part extends along the first direction, the fourth liquid cooling part is arranged on one side of the third liquid cooling part in the first direction, the third liquid cooling part is arranged opposite to any one of the first outer wall surface and the second outer wall surface of one of the single cells, and the fourth liquid cooling part is arranged opposite to any one of the first outer wall surface and the second outer wall surface of another of the single cells;

[0011] The adjacent first liquid cooling parts and the second liquid cooling parts cooperate to enclose a first containing groove, and the fourth liquid cooling part is embedded in the first containing groove to separate the first containing groove into at least two first sub-grooves, each of which contains at least one single battery.

[0012] In addition to or as an alternative to one or more of the features disclosed above, a plurality of first liquid cooling plates are provided, and each of the first liquid cooling plates is distributed along the first direction;

[0013] The battery pack also includes: a third liquid cooling plate, the third liquid cooling plate is arranged between two adjacent first liquid cooling plates, and the third liquid cooling plate includes: a sixth liquid cooling part, a seventh liquid cooling part and a second connecting part, the sixth liquid cooling part and the seventh liquid cooling part are distributed along the second direction and connected by the second connecting part, the sixth liquid cooling part and the seventh liquid cooling part are both arranged obliquely relative to the second direction, and the ends of the sixth liquid cooling part and the seventh liquid cooling part that are away from each other in the second direction are located on the same side of the second connecting part in the first direction, the sixth liquid cooling part is arranged opposite to the third outer wall surface of one of the single cells, the seventh liquid cooling part is arranged opposite to the third outer wall surface of another single cell, the sixth liquid cooling part and the seventh liquid cooling part cooperate to enclose a second accommodating groove, the second accommodating groove is used to accommodate the single cell, and the notch of the second accommodating groove is arranged opposite to the notch of the first accommodating groove.

[0014] In addition to or as an alternative to one or more of the features disclosed above, the second liquid cooling plate further comprises: a fifth liquid cooling portion, the fifth liquid cooling portion being arranged on a side of the third liquid cooling portion away from the fourth liquid cooling portion, the fifth liquid cooling portion extending along the first direction;

[0015] The fifth liquid cooling unit is embedded in the second containing tank to divide the second containing tank into at least two second sub-tanks, each of which contains at least one single battery.

[0016] In addition to or as an alternative to one or more features disclosed above, the first liquid cooling plate and the second liquid cooling plate are assembled separately.

[0017] In addition to or as an alternative to one or more of the features disclosed above, the battery pack further has a third direction intersecting the first direction and the second direction in pairs;

[0018] The single cell further comprises a fourth outer wall surface, wherein the fourth outer wall surface is connected to the first outer wall surface, the second outer wall surface and one side of the third outer wall surface along the third direction;

[0019] The battery pack further includes: a fourth liquid cooling plate, which is disposed on one side of the first liquid cooling plate and the second liquid cooling plate in the third direction, and is disposed opposite to a fourth outer wall surface of the single battery.

[0020] In addition to one or more of the features disclosed above, or as an alternative, the battery pack also includes: a fifth liquid cooling plate, which is inclined relative to the third liquid cooling part along the first direction, and the first liquid cooling plate, the second liquid cooling plate and the third liquid cooling plate are arranged on the same side of the fifth liquid cooling plate.

[0021] In addition to or instead of one or more of the features disclosed above, the first liquid cooling plate, the third liquid cooling plate and the fifth liquid cooling plate cooperate to form a third receiving tank, and at least a portion of the second liquid cooling plate is disposed in the third receiving tank to divide the third receiving tank into a plurality of third sub-tanks, and each of the single cells is accommodated in a corresponding one of the third sub-tanks.

[0022] In addition to or as an alternative to one or more of the features disclosed above, the single cell further has a positive electrode column and a negative electrode column;

[0023] The battery pack also includes: an electrical connector, through which the positive electrode column and the negative electrode column of two adjacent single cells are electrically connected, and the positive electrode column of any one of the single cells constitutes the output positive electrode of the battery pack, and the negative electrode column of any one of the single cells constitutes the output negative electrode of the battery pack.

[0024] On the other hand, an electrical device is further disclosed. In addition to or instead of one or more of the features disclosed above, the electrical device includes a battery pack as described in any one of the above items, and the battery pack serves as a power supply for the electrical device.

[0025] One of the above technical solutions has the following advantages or beneficial effects: In the present application, the first liquid cooling part and the second liquid cooling part in the first liquid cooling plate are arranged relative to different outer wall surfaces (first outer wall surface, second outer wall surface and third outer wall surface) of the single battery to perform liquid cooling on the triangular battery, thereby increasing the liquid cooling contact area between the liquid cooling plate and the single battery, improving the liquid cooling efficiency of the single battery, and then improving the liquid cooling efficiency of the battery pack, reducing the temperature rise of the battery pack during normal operation, and improving the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0027] Figure 1 is a three-dimensional structural view of a battery pack provided according to an embodiment of the present application;

[0028] Figure 2 is a top view of a single cell, a first liquid cooling plate, and a second liquid cooling plate provided according to a specific embodiment 1 of the present application;

[0029] Figure 3 is a three-dimensional structural view of a single cell provided according to an embodiment of the present application;

[0030] Figure 4 is a three-dimensional structural view from another perspective of a single cell provided in an embodiment of the present application;

[0031] Figure 5 is a top view of a first liquid cooling plate and a second liquid cooling plate provided according to a specific embodiment 1 of the present application;

[0032] Figure 6 is a structural diagram of a first liquid cooling plate provided according to a specific embodiment 1 of the present application;

[0033] Figure 7 is a structural diagram of a second liquid cooling plate provided according to a specific embodiment 1 of the present application;

[0034] Figure 8 is a structural diagram of another form of a second liquid cooling plate provided according to the first specific embodiment of the present application;

[0035] Fig. 9 It is a top view of a single cell, a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate and a fourth liquid cooling plate provided according to the second specific embodiment of the present application;

[0036] Fig.10 is a top view of a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate and a fourth liquid cooling plate provided according to the second specific embodiment of the present application;

[0037] Fig.11It is a structural diagram of a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate and a fourth liquid cooling plate provided according to a third specific embodiment of the present application;

[0038] Fig.12 It is a top view of a single cell, a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate and a fifth liquid cooling plate provided according to the third specific embodiment of the present application;

[0039] Fig.13 It is a structural diagram of a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate and a fifth liquid cooling plate provided according to a third specific embodiment of the present application;

[0040] Fig.14 is a top view of a single cell and an electrical connector provided according to an embodiment of the present application;

[0041] Fig.15 It is a top view of a single cell and an electrical connector provided according to another embodiment of the present application.

[0042] Description of reference numerals:

[0043] 100. Battery pack;

[0044] 110, box body;

[0045] 120, battery pack; 121, single battery; 1211, first outer wall; 1212, second outer wall; 1213, third outer wall; 1214, fourth outer wall; 1215, positive pole; 11251, output positive pole; 1216, negative pole; 11261, output negative pole;

[0046] 130, first liquid cooling plate; 131, first liquid cooling part; 132, second liquid cooling part; 133, first connecting part; 134, water inlet; 135, water outlet; 136, first containing tank; 1361, first sub-tank; 137, third containing tank; 1371, third sub-tank;

[0047] 140, second liquid cooling plate; 141, third liquid cooling unit; 142, fourth liquid cooling unit; 143, fifth liquid cooling unit;

[0048] 150, third liquid cooling plate; 151, sixth liquid cooling unit; 152, seventh liquid cooling unit; 153, second connecting unit; 154, second containing tank; 1541, second sub-tank;

[0049] 160, fourth liquid cooling plate;

[0050] 170, fifth liquid cooling plate;

[0051] 180. Electrical connectors;

[0052] 190. Top cover. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and beneficial effects of this application more clear, the following further describes this application in detail in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining this application, not for limiting this application.

[0054] In the description of the present application, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do 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 application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] With the continuous technological innovation in the new energy industry, the requirements for the temperature rise inside the battery pack are getting higher and higher. The existing battery pack liquid cooling solution is to place the liquid cooling plate at the bottom or top of the battery. The contact area between the liquid cooling plate and the battery is small, and the heat dissipation effect is relatively poor, resulting in poor safety performance of the battery pack.

[0058] In order to solve the above technical problems, in the embodiments of the present application, refer to Figures 1 to 15 The present application provides a battery pack 100, which has a first direction X, a second direction Y and a third direction Z that intersect each other. Exemplarily, the battery pack 100 has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other. Here, "perpendicular" refers to a state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°.

[0059] Specifically, the battery pack 100 includes: a box body 110 , a battery group 120 , a first liquid cooling plate 130 and an upper cover 190 .

[0060] Specifically, the battery pack 120 is accommodated in the box body 110 , the upper cover 190 is connected to the box body 110 , and the upper cover 190 covers the box body 110 to seal the box body 110 .

[0061] The battery pack 120 includes a plurality of unit batteries 121 , and the plurality of unit batteries 121 are distributed along the second direction Y.

[0062] Specifically, the single cell 121 has a first outer wall 1211, a second outer wall 1212 and a third outer wall 1213, which are distributed along the outer surface of the single cell 121 and connected in pairs to form a closed surface, and the first outer wall 1211, the second outer wall 1212 and the third outer wall 1213 are arranged at an angle in pairs, and the angle formed by at least two of the first outer wall 1211, the second outer wall 1212 and the third outer wall 1213 is an acute angle, that is, the first outer wall 1211, the second outer wall 1212 and the third outer wall 1213 together form a triangular structure, and the sum of the angles formed between the first outer wall 1211, the second outer wall 1212 and the third outer wall 1213 is 180°. The single cell 121 in the present application is a triangular battery.

[0063] The area of ​​the third outer wall surface 1213 is not less than the area of ​​the first outer wall surface 1211 and the area of ​​the second outer wall surface 1212 .

[0064] The single cell 121 may be a secondary battery, which refers to a battery that can be used continuously by activating active materials by charging after the battery is discharged. Exemplarily, the single cell 121 may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery or a nickel cadmium battery, but is not limited thereto.

[0065] The first liquid cooling plate 130 includes a first liquid cooling part 131 , a second liquid cooling part 132 and a first connecting part 133 . The first liquid cooling part 131 and the second liquid cooling part 132 are distributed along the second direction Y, and the first liquid cooling part 131 and the second liquid cooling part 132 are connected by the first connecting part 133 .

[0066] The first liquid cooling part 131 and the second liquid cooling part 132 are both arranged obliquely relative to the second direction Y, and the ends of the first liquid cooling part 131 and the second liquid cooling part 132 that are far away from each other in the second direction Y are located on the same side of the first connecting part 133 in the first direction X, that is, the first liquid cooling plate 130 is W-shaped.

[0067] The first liquid cooling part 131 is disposed opposite to the third outer wall surface 1213 of one single battery 121, and the second liquid cooling part 132 is disposed opposite to the third outer wall surface 1213 of another single battery 121. In other embodiments, the first liquid cooling part 131 and the second liquid cooling part 132 may also be disposed opposite to different outer wall surfaces of the same single battery 121, for example, the first liquid cooling part 131 is disposed corresponding to the first outer wall surface 1211 of the single battery 121, and the second liquid cooling part 132 is disposed corresponding to the second outer wall surface 1212 of the single battery 121.

[0068] Among them, the first liquid cooling part 131, the second liquid cooling part 132 and the first connecting part 133 can be integrally formed, and the first liquid cooling part 131, the second liquid cooling part 132 and the first connecting part 133 can also be fixedly connected to each other. For example, the first liquid cooling part 131, the second liquid cooling part 132 and the first connecting part 133 are fixedly connected to each other using a welding process, but are not limited to this. No specific limitation is made in this application and can be selected according to actual circumstances.

[0069] The first liquid cooling plate 130 is made of a heat-conducting material. For example, the first liquid cooling plate 130 may be made of any one of copper, aluminum or stainless steel, but is not limited thereto.

[0070] The first liquid cooling plate 130 can be formed into a linear liquid cooling plate by using an aluminum extrusion process, and the linear liquid cooling plate is bent multiple times in a bending device to obtain the first liquid cooling plate 130 .

[0071] It can be understood that in the present application, the first liquid cooling part 131 and the second liquid cooling part 132 in the first liquid cooling plate 130 are arranged relative to any outer wall surface of different single cells 121 to perform liquid cooling on the irregular triangular batteries, thereby increasing the liquid cooling contact area between the liquid cooling plate and the single cells 121, improving the liquid cooling efficiency of the single cells 121, and thus improving the liquid cooling efficiency of the battery pack 100, reducing the temperature rise of the battery pack 100 during normal operation, and improving the safety performance of the battery pack 100; at the same time, while ensuring the normal use of the electrical connector, the cross-sectional area of ​​the electrical connector can be reduced, that is, the size of the electrical connector can be reduced, thereby reducing the cost and weight of the battery pack.

[0072] In one embodiment, a plurality of the first liquid cooling parts 131, the second liquid cooling parts 132 and the first connecting parts 133 are provided, and the plurality of first liquid cooling parts 131, the plurality of second liquid cooling parts 132 and the plurality of first connecting parts 133 are distributed along the second direction Y, so that the first liquid cooling plate 130 is in a multi-stage W shape, so as to perform liquid cooling on the plurality of single cells 121 in the battery pack 120 to improve the heat dissipation efficiency.

[0073] In the specific embodiment 1 of the present application:

[0074] Reference Figures 2 to 8 The battery pack 100 further includes: a second liquid cooling plate 140, which is disposed on one side of the battery pack 120, that is, the second liquid cooling plate 140 can be disposed on one side of the battery pack 120 in the first direction X, or on one side of the battery pack 120 in the second direction Y. This is not specifically limited in the present application and can be selected according to actual circumstances. Exemplarily, the second liquid cooling plate 140 can be disposed on one side of the battery pack 120 in the first direction X.

[0075] Specifically, the second liquid cooling plate 140 includes: a third liquid cooling part 141 and a fourth liquid cooling part 142, the third liquid cooling part 141 extends along the second direction Y, the fourth liquid cooling part 142 extends along the first direction X, and the fourth liquid cooling part 142 is arranged on one side of the third liquid cooling part 141 in the first direction X, that is, the second liquid cooling plate 140 is T-shaped.

[0076] Among them, the third liquid cooling part 141 and the fourth liquid cooling part 142 can be integrally formed, and the third liquid cooling part 141 and the fourth liquid cooling part 142 can also be fixedly connected. For example, the third liquid cooling part 141 and the fourth liquid cooling part 142 are fixedly connected using a welding process, but are not limited to this. No specific limitation is made in this application and can be specifically selected according to actual circumstances.

[0077] The second liquid cooling plate 140 is made of a heat-conducting material. For example, the second liquid cooling plate 140 may be made of any one of copper, aluminum or stainless steel, but is not limited thereto.

[0078] The second liquid cooling plate 140 may be obtained by directly forming an aluminum material using an aluminum extrusion process, but is not limited thereto.

[0079] Specifically, the third liquid cooling unit 141 is disposed opposite to any one of the first outer wall surface 1211 and the second outer wall surface 1212 of a single battery 121 , and the fourth liquid cooling unit 142 is disposed opposite to any one of the first outer wall surface 1211 and the second outer wall surface 1212 of another single battery 121 .

[0080] Specifically, the adjacent first liquid cooling parts 131 and the second liquid cooling parts 132 cooperate to enclose a first receiving groove 136, and the fourth liquid cooling part 142 is embedded in the first receiving groove 136 to separate the first receiving groove into at least two first sub-grooves 1361, each of which accommodates at least one single battery 121.

[0081] The first receiving groove 136 and the first sub-groove 1361 are both triangular in shape, but are not limited thereto.

[0082] It can be understood that when the single battery 121 is accommodated in the first sub-slot 1361, the first outer wall surface 1211 and the second outer wall surface 1212 of the single battery 121 are respectively arranged opposite to the third liquid cooling part 141 and the fourth liquid cooling part 142, and the third outer wall surface 1213 of the single battery 121 is arranged opposite to the first liquid cooling part 131 or the second liquid cooling part 132, so that the first liquid cooling plate 130 and the second liquid cooling plate 140 can simultaneously cool the first outer wall surface 1211, the second outer wall surface 1212 and the third outer wall surface 1213 of the single battery 121. 3 liquid cooling heat dissipation, further increasing the contact area between the liquid cooling plate and the single battery 121, improving the liquid cooling efficiency of the single battery 121, and then improving the liquid cooling efficiency of the battery pack 100, reducing the temperature rise of the battery pack 100 during normal operation, and improving the safety performance of the battery pack 100; at the same time, the fourth liquid cooling part 142 is embedded in the first receiving groove 136 in the present application to reduce the occupied space of the second liquid cooling plate 140, so that the structure between the first liquid cooling plate 130 and the second liquid cooling plate 140 is compact, and the overall structural stability of the battery pack 100 is improved.

[0083] In one embodiment, referring to Figures 2 to 5 A plurality of first liquid cooling plates 130 are provided, and each first liquid cooling plate 130 is distributed along the first direction X. In the present application, a plurality of first liquid cooling plates 130 are provided to perform liquid cooling on a plurality of single cells 121 , thereby further improving the liquid cooling efficiency of the battery pack 100 .

[0084] The battery pack 100 further includes a third liquid cooling plate 150 , which is disposed between two adjacent first liquid cooling plates 130 .

[0085] Specifically, the third liquid cooling plate 150 includes: a sixth liquid cooling part 151, a seventh liquid cooling part 152 and a second connecting part 153. The sixth liquid cooling part 151 and the seventh liquid cooling part 152 are distributed along the second direction Y and are connected by the second connecting part 153. The sixth liquid cooling part 151 and the seventh liquid cooling part 152 are both arranged obliquely relative to the second direction Y, and the ends of the sixth liquid cooling part 151 and the seventh liquid cooling part 152 that are far away from each other in the second direction Y are located on the same side of the second connecting part 153 in the first direction X. The sixth liquid cooling part 151 is arranged opposite to the third outer wall surface 1213 of a single battery 121, and the seventh liquid cooling part 152 is arranged opposite to the third outer wall surface 1213 of another single battery 121.

[0086] Among them, the sixth liquid cooling part 151, the seventh liquid cooling part 152 and the second connecting part 153 can be integrally formed, and the sixth liquid cooling part 151, the seventh liquid cooling part 152 and the second connecting part 153 can also be fixedly connected to each other. For example, the sixth liquid cooling part 151, the seventh liquid cooling part 152 and the second connecting part 153 are fixedly connected to each other using a welding process, but are not limited to this. No specific limitation is made in this application and can be selected according to the actual situation.

[0087] The third liquid cooling plate 150 is made of a heat-conducting material. For example, the third liquid cooling plate 150 may be made of any one of copper, aluminum or stainless steel, but is not limited thereto.

[0088] The third liquid cooling plate 150 can firstly be formed into a linear liquid cooling plate by using an aluminum extrusion process to form an aluminum material, and then the linear liquid cooling plate is bent multiple times by a bending device to obtain the third liquid cooling plate 150 .

[0089] Furthermore, the second liquid cooling plate 140 further includes: a fifth liquid cooling part 143, which is disposed on a side of the third liquid cooling part 141 away from the fourth liquid cooling part 142, and extends along the first direction X, that is, the second liquid cooling plate 140 is cross-shaped.

[0090] Specifically, the sixth liquid cooling part 151 and the seventh liquid cooling part 152 cooperate to enclose a second receiving groove 154, and the second receiving groove 154 is used to receive the single battery 121. The notch of the second receiving groove 154 is arranged opposite to the notch of the first receiving groove 136, that is, the third liquid cooling plate 150 and the first liquid cooling plate 130 are arranged in a mirror image in the first direction X. The fifth liquid cooling part 143 is embedded in the second receiving groove 154 to divide the second receiving groove into at least two second sub-grooves 1541, and each second sub-groove 1541 receives at least one single battery 121.

[0091] The second receiving groove 154 and the second sub-groove 1541 may be triangular in shape, but are not limited thereto.

[0092] It can be understood that when the single battery 121 is accommodated in the second sub-slot 1541, the first outer wall surface 1211 and the second outer wall surface 1212 of the single battery 121 are respectively arranged opposite to the third liquid cooling part 141 and the fourth liquid cooling part 142, and the third outer wall surface 1213 of the single battery 121 is arranged opposite to the sixth liquid cooling part 151 or the seventh liquid cooling part 152, so that the third liquid cooling plate 150 and the second liquid cooling plate 140 can simultaneously cool the first outer wall surface 1211, the second outer wall surface 1212 and the third outer wall surface of the single battery 121. 1213 liquid cooling dissipates heat, further improving the liquid cooling efficiency of the single cell 121, thereby improving the liquid cooling efficiency of the battery pack 100, reducing the temperature rise of the battery pack 100 during normal operation, and improving the safety performance of the battery pack 100; at the same time, the present application embeds the fifth liquid cooling part 143 in the second receiving groove 154 to further reduce the space occupied by the second liquid cooling plate 140, so that the structure between the first liquid cooling plate 130, the second liquid cooling plate 140 and the third liquid cooling plate 150 is compact, further improving the overall structural stability of the battery pack 100.

[0093] In one embodiment, the first liquid cooling plate 130 and the second liquid cooling plate 140 are assembled separately. Exemplarily, after the first liquid cooling plate 130 and the second liquid cooling plate 140 are formed separately, they are welded into an integral structure by a welding process.

[0094] In one embodiment, the first liquid cooling plate 130 , the second liquid cooling plate 140 , and the third liquid cooling plate 150 are all provided with a water inlet and a water outlet.

[0095] The battery pack 100 also includes a main liquid inlet pipe and a main liquid outlet pipe. The water inlets and water outlets on the first liquid cooling plate 130, the second liquid cooling plate 140 and the third liquid cooling plate 150 are respectively connected to the main liquid inlet pipe and the main liquid outlet pipe fluid to ensure the normal use of the first liquid cooling plate 130, the second liquid cooling plate 140 and the third liquid cooling plate 150.

[0096] In one embodiment, an aerogel layer is filled between the first liquid cooling plate 130 , the second liquid cooling plate 140 , the third liquid cooling plate 150 and the outer wall surface of the single battery 121 to facilitate the connection and fixation between the first liquid cooling plate 130 , the second liquid cooling plate 140 , the third liquid cooling plate 150 and the single battery 121 .

[0097] In one embodiment, referring to Figure 14 to Figure 15 The single cell 121 also has a positive electrode column 1215 and a negative electrode column 1216 .

[0098] The battery pack 100 also includes: an electrical connector 180, through which the positive electrode column 1215 and the negative electrode column 1216 of two adjacent single cells 121 are electrically connected, and the positive electrode column 1215 of any single cell 121 constitutes an output positive electrode 11251 of the battery pack, and the negative electrode column 1216 of any single cell 121 constitutes an output negative electrode 11261 of the battery pack, that is, the battery pack 100 in the present application can set different positive electrode columns 1215 and negative electrode columns 1216 of different single cells 121 as output electrodes according to different arrangements of the electrical connectors 180, so as to simplify the overall design of the battery pack 100 and further reduce costs.

[0099] The single cell 121 includes: a shell, an electrode assembly, an end cover, an electrolyte and other functional components.

[0100] The electrode assembly is housed in the shell. The electrode assembly is a component in the single cell 121 where an electrochemical reaction occurs, and the electrode assembly can be one or more. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet, a separator and a negative electrode sheet. The part of the positive electrode sheet and the negative electrode sheet with active substances constitutes the main body of the electrode assembly, the part of the positive electrode sheet without active substances constitutes the positive electrode ear, and the part of the negative electrode sheet without active substances constitutes the negative electrode ear. The electrolyte can be a conventional electrolyte, or a special electrolyte with additives added, and the electrolyte is used to soak the electrode assembly. The end cover covers the shell to seal the shell. During the charge and discharge process of the single cell 121, the positive electrode active substance and the negative electrode active substance react with the electrolyte, the positive electrode ear is electrically connected to the positive electrode column, and the negative electrode ear is electrically connected to the negative electrode column to form a current loop, so that the single cell 121 can be used normally.

[0101] The electrical connector 180 is made of conductive metal. For example, the electrical connector 180 may be made of copper, aluminum or other materials, but is not limited thereto.

[0102] In the second specific embodiment of the present application:

[0103] A solution further formed on the basis of specific embodiment 1.

[0104] Specifically, refer to Figures 9 to 11 The single battery 121 further has a fourth outer wall surface 1214 , and the fourth outer wall surface 1214 is connected to one side of the first outer wall surface 1211 , the second outer wall surface 1212 and the third outer wall surface 1213 along the third direction Z.

[0105] The battery pack 100 further includes a fourth liquid cooling plate 160 , which is disposed on one side of the first liquid cooling plate 130 and the second liquid cooling plate 140 in the third direction Z. The fourth liquid cooling plate 160 is disposed opposite to the fourth outer wall surface 1214 of the single battery 121 .

[0106] The fourth liquid cooling plate 160 is made of a heat-conducting material. For example, the fourth liquid cooling plate 160 may be made of any one of copper, aluminum or stainless steel, but is not limited thereto.

[0107] The fourth liquid cooling plate 160 can be formed by forming aluminum material using an aluminum extrusion process.

[0108] The space between the fourth liquid cooling plate 160 and the outer wall surface of the single battery 121 is filled with an aerogel layer, so as to facilitate the connection and fixation between the fourth liquid cooling plate 160 and the single battery 121 .

[0109] It can be understood that the present application uses the first liquid cooling plate 130, the second liquid cooling plate 140 and the third liquid cooling plate 150 to respectively liquid-cool the first outer wall surface 1211, the second outer wall surface 1212 and the third outer wall surface 1213 of the single battery 121, and further arranges the fourth liquid cooling plate 160 to liquid-cool the fourth outer wall surface 1214 of the single battery 121 to further increase the liquid cooling contact area between the liquid cooling plate and the single battery 121, improve the liquid cooling efficiency of the single battery 121, and then improve the liquid cooling efficiency of the battery pack 100, reduce the temperature rise of the battery pack 100 during normal operation, and improve the safety performance of the battery pack 100.

[0110] In one embodiment, the first liquid cooling plate 130 , the second liquid cooling plate 140 , the third liquid cooling plate 150 and the fourth liquid cooling plate 160 are integrally formed, that is, the liquid cooling channels in the first liquid cooling plate 130 , the second liquid cooling plate 140 , the third liquid cooling plate 150 and the fourth liquid cooling plate 160 are fluidly connected to improve the overall assembly efficiency of the battery pack 100 .

[0111] In one embodiment, at least one of the first liquid cooling plate 130 , the second liquid cooling plate 140 , the third liquid cooling plate 150 and the fourth liquid cooling plate 160 is provided with a water inlet 134 and a water outlet 135 , and the water inlet 134 and the water outlet 135 are respectively connected to the main liquid inlet pipe and the main liquid outlet pipe fluid to ensure the normal use of the first liquid cooling plate 130 , the second liquid cooling plate 140 and the third liquid cooling plate 150 .

[0112] Exemplarily, there are multiple water inlets 134 and water outlets 135. Exemplarily, there is only one water inlet 134 and water outlet 135. This application does not make specific restrictions and can be specifically set according to actual circumstances.

[0113] At the same time, other technical features of the battery pack 100 in the specific embodiment 2 of the present application are the same as those in the above-mentioned specific embodiment 1. In view of the fact that the corresponding features have been described in detail in the above-mentioned specific embodiment 1, the specific embodiment 2 in the present application will not be described accordingly, and reference may be made to the description in the specific embodiment 1.

[0114] In the specific embodiment 3 of the present application:

[0115] A solution further formed on the basis of specific embodiment 1.

[0116] Specifically, refer to Figure 12 to Figure 13 The battery pack 100 also includes: a fifth liquid cooling plate 170 , along the first direction X, the fifth liquid cooling plate 170 is tilted relative to the third liquid cooling portion 141 , and the first liquid cooling plate 130 , the second liquid cooling plate 140 and the third liquid cooling plate 150 are arranged on the same side of the fifth liquid cooling plate 170 .

[0117] The fifth liquid cooling plate 170 is made of a heat-conducting material. For example, the fifth liquid cooling plate 170 may be made of any one of copper, aluminum or stainless steel, but is not limited thereto.

[0118] The fifth liquid cooling plate 170 can be formed by forming aluminum material using an aluminum extrusion process.

[0119] Among them, the first liquid cooling plate 130, the second liquid cooling plate 140, the third liquid cooling plate 150 and the fifth liquid cooling plate 170 can be integrally formed, and the first liquid cooling plate 130, the second liquid cooling plate 140, the third liquid cooling plate 150 and the fifth liquid cooling plate 170 can also be separately provided, and fixedly connected between each other. This application does not make specific restrictions and can be selected according to the actual situation. Exemplarily, the first liquid cooling plate 130, the third liquid cooling plate 150 and the fifth liquid cooling plate 170 are integrally formed, part of the second liquid cooling plate 140 and the fifth liquid cooling plate 170 are integrally formed, and another part of the second liquid cooling plate 140 and the fifth liquid cooling plate 170 are fixedly connected by welding technology, but it is not limited to this.

[0120] Among them, the first liquid cooling plate 130, the second liquid cooling plate 140, the third liquid cooling plate 150 and the fifth liquid cooling plate 170 form a triangular structure to improve the structural stability of the battery pack 100, improve the torsion and impact resistance of the battery pack 100, and ultimately improve the safety performance of the battery pack 100.

[0121] In one embodiment, the first liquid cooling plate 130 , the third liquid cooling plate 150 , and the fifth liquid cooling plate 170 cooperate to form a third receiving groove 137 , and at least a portion of the second liquid cooling plate 140 is disposed in the third receiving groove 137 to divide the third receiving groove 137 into a plurality of third sub-grooves 1371 , and each single battery 121 is accommodated in a corresponding third sub-grooves 1371 .

[0122] It can be understood that when the single cell 121 is accommodated in the third sub-slot 1371, the first liquid cooling plate 130, the second liquid cooling plate 140, the third liquid cooling plate 150 and the fifth liquid cooling plate 170 respectively and simultaneously dissipate heat from different outer wall surfaces of the single cell 121, thereby further improving the liquid cooling efficiency of the single cell 121, and then improving the liquid cooling efficiency of the battery pack 100, reducing the temperature rise of the battery pack 100 during normal operation, and improving the safety performance of the battery pack 100.

[0123] At the same time, other technical features of the battery pack 100 in the specific embodiment 3 of the present application are the same as those in the above-mentioned specific embodiment 1. In view of the fact that the corresponding features have been described in detail in the above-mentioned specific embodiment 1, the specific embodiment 3 in the present application will not be described accordingly, and reference may be made to the description in the specific embodiment 1.

[0124] On the other hand, in an embodiment of the present application, the present application further provides an electrical device, comprising a battery pack 100 as described in any of the above embodiments, wherein the battery pack 100 serves as a power supply for the electrical device.

[0125] Among them, electrical devices may be, but are not limited to, mobile devices (such as mobile phones, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc.

[0126] The introduction provided in the above steps is only used to help understand the method, structure and core idea of ​​the present application. For ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A battery pack, characterized in that: Having a first direction and a second direction intersecting each other, and the battery pack comprises: Box; A battery pack is housed in the box, the battery pack comprising a plurality of single cells distributed along the second direction; the single cells have a first outer wall surface, a second outer wall surface and a third outer wall surface, the first outer wall surface, the second outer wall surface and the third outer wall surface are distributed along the outer surface of the single cells and are connected in pairs to form a closed surface, the first outer wall surface, the second outer wall surface and the third outer wall surface are arranged at an angle in pairs, and the angle formed by at least two of the first outer wall surface, the second outer wall surface and the third outer wall surface is an acute angle; and The first liquid cooling plate comprises a first liquid cooling part, a second liquid cooling part and a first connecting part, the first liquid cooling part and the second liquid cooling part are distributed along the second direction and connected by the first connecting part, the first liquid cooling part and the second liquid cooling part are both arranged obliquely relative to the second direction, and ends of the first liquid cooling part and the second liquid cooling part that are away from each other in the second direction are located on the same side of the first connecting part in the first direction, the first liquid cooling part is arranged opposite to the third outer wall surface of one of the single cells, and the second liquid cooling part is arranged opposite to the third outer wall surface of another of the single cells.

2. The battery pack according to claim 1, characterized in that: Also includes: a second liquid cooling plate, arranged at one side of the battery pack, and comprising: a third liquid cooling part and a fourth liquid cooling part, the third liquid cooling part extending along the second direction, the fourth liquid cooling part extending along the first direction, the fourth liquid cooling part arranged at one side of the third liquid cooling part in the first direction, the third liquid cooling part being arranged opposite to any one of the first outer wall surface and the second outer wall surface of one of the single cells, and the fourth liquid cooling part being arranged opposite to any one of the first outer wall surface and the second outer wall surface of another of the single cells; The adjacent first liquid cooling parts and the second liquid cooling parts cooperate to enclose a first containing groove, and the fourth liquid cooling part is embedded in the first containing groove to separate the first containing groove into at least two first sub-grooves, each of which contains at least one single battery.

3. The battery pack according to claim 2, characterized in that: There are multiple first liquid cooling plates, and each of the first liquid cooling plates is distributed along the first direction; The battery pack also includes: a third liquid cooling plate, the third liquid cooling plate is arranged between two adjacent first liquid cooling plates, and the third liquid cooling plate includes: a sixth liquid cooling part, a seventh liquid cooling part and a second connecting part, the sixth liquid cooling part and the seventh liquid cooling part are distributed along the second direction and connected by the second connecting part, the sixth liquid cooling part and the seventh liquid cooling part are both arranged obliquely relative to the second direction, and the ends of the sixth liquid cooling part and the seventh liquid cooling part that are away from each other in the second direction are located on the same side of the second connecting part in the first direction, the sixth liquid cooling part is arranged opposite to the third outer wall surface of one of the single cells, the seventh liquid cooling part is arranged opposite to the third outer wall surface of another single cell, the sixth liquid cooling part and the seventh liquid cooling part cooperate to enclose a second accommodating groove, the second accommodating groove is used to accommodate the single cell, and the notch of the second accommodating groove is arranged opposite to the notch of the first accommodating groove.

4. The battery pack according to claim 3, characterized in that: The second liquid cooling plate further includes: a fifth liquid cooling portion, which is disposed on a side of the third liquid cooling portion away from the fourth liquid cooling portion along the first direction, and the fifth liquid cooling portion extends along the first direction; The fifth liquid cooling unit is embedded in the second containing tank to divide the second containing tank into at least two second sub-tanks, each of which contains at least one single battery.

5. The battery pack according to any one of claims 2 to 4, characterized in that: The first liquid cooling plate and the second liquid cooling plate are assembled separately.

6. The battery pack according to any one of claims 2 to 4, characterized in that: The battery pack further has a third direction intersecting the first direction and the second direction in pairs; The single cell further comprises a fourth outer wall surface, wherein the fourth outer wall surface is connected to the first outer wall surface, the second outer wall surface and one side of the third outer wall surface along the third direction; The battery pack further includes: a fourth liquid cooling plate, which is disposed on one side of the first liquid cooling plate and the second liquid cooling plate in the third direction, and is disposed opposite to a fourth outer wall surface of the single battery.

7. The battery pack according to claim 4, characterized in that: The battery pack further includes: a fifth liquid cooling plate, which is tilted relative to the third liquid cooling part along the first direction, and the first liquid cooling plate, the second liquid cooling plate and the third liquid cooling plate are arranged on the same side of the fifth liquid cooling plate.

8. The battery pack according to claim 7, characterized in that: The first liquid cooling plate, the third liquid cooling plate and the fifth liquid cooling plate cooperate to form a third receiving groove, at least a portion of the second liquid cooling plate is disposed in the third receiving groove to divide the third receiving groove into a plurality of third sub-grooves, and each of the single cells is accommodated in a corresponding one of the third sub-grooves.

9. The battery pack according to claim 1, characterized in that: The single cell also has a positive electrode column and a negative electrode column; The battery pack also includes: an electrical connector, through which the positive electrode column and the negative electrode column of two adjacent single cells are electrically connected, and the positive electrode column of any one of the single cells constitutes the output positive electrode of the battery pack, and the negative electrode column of any one of the single cells constitutes the output negative electrode of the battery pack.

10. An electrical device, characterized in that: It comprises a battery pack as claimed in any one of claims 1 to 9, wherein the battery pack serves as a power supply for the electrical device.

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