Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, and relates to the technical field of new energy batteries. The battery pack comprises a battery pack and a liquid cooling plate group, the battery pack is arranged on the liquid cooling plate group, the liquid cooling plate group comprises at least two liquid cooling plates, the at least two liquid cooling plates are arranged along a first direction, the side edges of the two adjacent liquid cooling plates are connected, a liquid inlet flow channel and a plurality of liquid outlet flow channels are formed in the liquid cooling plates, and the liquid outlet flow channels are communicated with the liquid inlet flow channel. And the plurality of liquid outlet flow channels are respectively communicated with the liquid inlet flow channel. According to the liquid cooling plate of the battery pack, the time of the cooling liquid flowing through the liquid cooling plate can be shortened, and the cooling efficiency is improved.

Description

Technical Field

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

[0002] High-power battery packs generate a lot of heat during charging and discharging, and coolant needs to be circulated externally to remove the large amount of heat to achieve the purpose of heat dissipation.

[0003] In the related art, liquid cooling pipes are usually arranged in a curved manner to increase the cooling area of ​​the liquid cooling plate. However, the curved liquid cooling pipes increase the flow distance of the coolant, which prolongs the time for the coolant to flow through the liquid cooling pipes and reduces the cooling efficiency. Utility Model Content

[0004] In view of this, the present application provides a battery pack and an electrical device, aiming to solve one of the technical problems in the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery pack, comprising:

[0007] Battery pack;

[0008] A liquid cooling plate group, wherein the battery group is arranged on the liquid cooling plate group, and the liquid cooling plate group includes at least two liquid cooling plates, wherein the at least two liquid cooling plates are arranged in a first direction, and the sides of two adjacent liquid cooling plates are connected, and a liquid inlet channel and multiple liquid outlet channels are formed in the liquid cooling plate, and the multiple liquid outlet channels are respectively connected to the liquid inlet channel.

[0009] In one embodiment of the first aspect, the liquid cooling plate comprises:

[0010] a top plate, the battery pack being arranged on the top plate;

[0011] a bottom plate, the bottom plate being arranged on a side of the top plate away from the battery pack and spaced apart from the top plate;

[0012] a front seal and a rear seal, wherein the front seal connects the top plate and the bottom plate, and the rear seal connects the top plate and the bottom plate, the front seal and the rear seal are spaced apart along a second direction, and the first direction is perpendicular to the second direction;

[0013] A first side plate and a second side plate, wherein the first side plate connects the top plate and the bottom plate, the second side plate connects the top plate and the bottom plate, and the first side plate and the second side plate are spaced apart along the first direction.

[0014] In one embodiment of the first aspect, the liquid cooling plate further comprises:

[0015] The liquid inlet channel wall is arranged parallel to the first side plate and spaced apart along the first direction to form the liquid inlet channel, the liquid inlet end of the liquid inlet channel is formed on the side of the first side plate close to the front end seal, and the liquid outlet end of the liquid inlet channel is formed on the side of the liquid inlet channel wall close to the rear end seal.

[0016] In one embodiment of the first aspect, when the two liquid cooling plates are connected, the two first side plates are connected, and the liquid inlet ends of the two liquid inlet channels are connected;

[0017] The two top plates are sealed and connected. A liquid inlet is provided on one side of the top plate close to the front end seal. The liquid inlet is also provided corresponding to the liquid inlet end of the liquid inlet channel so that the liquid inlet is connected to the two liquid inlet channels.

[0018] In one embodiment of the first aspect, the liquid cooling plate further comprises:

[0019] a plurality of liquid outlet channel walls, the plurality of liquid outlet channel walls being arranged between the second side plate and the liquid inlet channel wall, the liquid outlet channel walls being arranged parallel to the liquid inlet channel wall, and the plurality of liquid outlet channel walls being arranged at intervals along the first direction to form a plurality of liquid outlet channels;

[0020] in,

[0021] The end of the liquid outlet channel wall is spaced apart from the rear end seal to form a liquid inlet end of the liquid outlet channel, and the liquid inlet end of the liquid outlet channel is connected to the liquid outlet end of the liquid inlet channel;

[0022] The liquid outlet end of the liquid outlet channel is formed on a side of the liquid outlet channel wall close to the front end sealing component.

[0023] In one embodiment of the first aspect, the distance between the liquid outlet channel wall and the rear end seal gradually decreases in a direction approaching the second side plate.

[0024] In one embodiment of the first aspect, the front end seal has a hollow sealed cavity structure, a liquid guide channel is provided on a side of the front end seal close to the liquid outlet channel, the liquid guide channel is connected to the liquid outlet channel, and a liquid outlet is provided on a side of the front end seal away from the liquid outlet channel.

[0025] In one embodiment of the first aspect, the battery pack further includes a fixing member, which is disposed on the top plate, and an end edge of the fixing member close to the top plate is recessed inward to form an escape space.

[0026] In one embodiment of the first aspect, the battery pack further includes an upper cover, the upper cover including a main body and an outer flange, the battery pack is accommodated in the main body, the outer flange is connected to the edge of the liquid cooling plate group, the side of the main body is provided with a plurality of spaced reinforcing ribs, and a connection hole is provided on the outer flange corresponding to each of the reinforcing ribs.

[0027] In a second aspect, an embodiment of the present application further provides an electrical device comprising the battery pack of any of the above embodiments.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows: the present application proposes a battery pack, comprising a battery pack and a liquid cooling plate group, the battery pack being arranged on the liquid cooling plate group, the liquid cooling plate group comprising at least two liquid cooling plates, at least two liquid cooling plates being arranged along a first direction, the sides of two adjacent liquid cooling plates being connected, a liquid inlet channel and multiple liquid outlet channels being formed in the liquid cooling plate, the multiple liquid outlet channels being respectively connected to the liquid inlet channel, so that the cooling liquid flowing out of the liquid inlet channel can be simultaneously poured into multiple liquid outlet channels, thereby shortening the time and flow distance for the cooling liquid to flow through the liquid cooling plate and improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application 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 creative work.

[0030] Figure 1 A schematic structural diagram of a battery pack according to a first embodiment of the present application is shown;

[0031] Figure 2 A schematic diagram of the structure of a battery pack with the upper cover removed is shown in Example 1 of the present application;

[0032] Figure 3 A schematic diagram of the assembly structure of the liquid cooling plate assembly and the fixing member of the first embodiment of the present application is shown;

[0033] Figure 4 A schematic cross-sectional view of the liquid cooling plate assembly according to the first embodiment of the present application is shown;

[0034] Figure 5 Shown Figure 4 The structural diagram of the enlarged view at II in the middle;

[0035] Figure 6 Shown Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0036] Figure 7Shown Figure 1 Schematic diagram of the cross-sectional structure at point I;

[0037] Figure 8 A schematic cross-sectional view of the liquid cooling plate assembly according to the second embodiment of the present application is shown;

[0038] Figure 9 A schematic cross-sectional structure diagram of the liquid cooling plate group in the third embodiment of the present application is shown.

[0039] Description of main component symbols: 100-battery pack;

[0040] 110-battery pack; 111-battery module;

[0041] 120 - Liquid cooling plate assembly; 121 - Liquid cooling plate; P1 - Liquid inlet channel; P2 - Liquid outlet channel; 1211 - Top plate; 1212 - Bottom plate; 1213 - Front seal; 1214 - Rear seal; 1215 - First side plate; 1216 - Second side plate; 1217 - Liquid inlet channel wall; 12111 - Liquid inlet; 1218 - Liquid outlet channel wall; 12133 - Liquid guide channel; 12131 - Baffle; 12132 - Accommodation cavity; 12134 - Liquid outlet; 122 - Connecting frame;

[0042] 130-fixing part; 134-avoidance space; 131-bottom surface; 132-connection surface; 133-side surface;

[0043] 140-upper cover; 141-main body; 142-outer flange; 1411-reinforcement rib; 1421-connection hole;

[0044] D1-first direction; D2-second direction; D3-third direction. DETAILED DESCRIPTION

[0045] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0046] 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", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present 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 should not be understood as a limitation on the present application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0048] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] Example 1

[0051] like Figure 1 As shown, an embodiment of the present application provides a battery pack 100 , including a battery group 110 and a liquid cooling plate group 120 .

[0052] The battery pack 110 is disposed on the liquid cooling plate assembly 120 .

[0053] In some embodiments, as Figure 2 As described above, the battery pack 110 includes four 1P12S standard battery modules 111 .

[0054] The modules are connected via copper bars, which connect the modules in series to form a high-voltage circuit. This arrangement of the battery modules 111 makes full use of the internal space of the battery pack 100, improving the space utilization and energy density of the battery pack 100.

[0055] It is understood that in other embodiments, the number and arrangement of the battery modules 111 can be adjusted according to actual needs. Alternatively, the battery pack 110 may be directly composed of multiple battery cells without the battery modules 111 .

[0056] In some embodiments, the liquid cooling plate group 120 includes at least two liquid cooling plates 121, and the at least two liquid cooling plates 121 are arranged along the first direction D1, and the sides of two adjacent liquid cooling plates 121 are connected. Figure 3 As shown, there are two liquid cooling plates 121 .

[0057] In the related art, the liquid cooling plate 121 is usually manufactured by welding a liquid cooling pipeline between two aluminum plates spaced apart from each other. This manufacturing method reduces the processing efficiency of the liquid cooling plate 121 .

[0058] The present application improves the assembly efficiency of the liquid cooling plate group 120 by pre-forming a flow channel for the cooling liquid in a single liquid cooling plate 121 and then welding the two liquid cooling plates 121 together.

[0059] In the related art, the cooling liquid pipeline usually adopts a method of making the cooling liquid flow in a rotating manner to increase the cooling area, but this flow method prolongs the residence time of the cooling liquid in the liquid cooling pipe and reduces the cooling efficiency of the liquid cooling plate.

[0060] In some embodiments, a liquid inlet channel P1 and multiple liquid outlet channels P2 are formed in the liquid cooling plate 121. The multiple liquid outlet channels P2 are respectively connected to the liquid inlet channel P1, so that the coolant flowing out of the liquid inlet channel P1 can be diverted and simultaneously poured into the multiple liquid outlet channels P2, filling and updating the coolant in the multiple liquid outlet channels P2, thereby expanding the cooling area. There is no need to make the coolant circulate in the flow, shortening the flow distance of the coolant and the flow time of the coolant in the liquid cooling plate 121, thereby improving the cooling efficiency.

[0061] In some embodiments, please refer to Figure 3 and Figure 5 The liquid cooling plate 121 includes a top plate 1211 , a bottom plate 1212 , a front seal 1213 , a rear seal 1214 , a first side plate 1215 and a second side plate 1216 .

[0062] In one embodiment, the liquid cooling plate 121 is made of aluminum alloy of model AL6063-T6, which reduces the overall weight of the liquid cooling plate 121 and solves the lightweight problem of the product.

[0063] The battery pack 110 is disposed on the top plate 1211 , and the bottom of the battery pack 110 contacts the top plate 1211 , so that the heat emitted by the battery pack 110 is transferred by the coolant in the liquid cooling plate 121 .

[0064] The bottom plate 1212 is disposed on a side of the top plate 1211 away from the battery pack 110 and is spaced apart from the top plate 1211 .

[0065] The front seal 1213 and the rear seal 1214 are spaced apart along the second direction D2. The front seal 1213 is sealedly connected to the top plate 1211 and the bottom plate 1212 respectively. The rear seal 1214 is sealedly connected to the top plate 1211 and the bottom plate 1212 respectively to prevent liquid leakage.

[0066] It should be noted that the first direction D1 is the arrangement direction of the battery module 111, and the second direction D2 is the arrangement direction of the multiple battery cells in the battery module 111. For example, Figure 3 As shown, the first direction D1 is the width direction of the liquid cooling plate 121, the second direction D2 is the length direction of the liquid cooling plate 121, and the third direction D3 is the height direction of the liquid cooling plate 121. The first direction D1, the second direction D2 and the third direction D3 are perpendicular to each other.

[0067] In some embodiments, as Figure 2 and Figure 3 As shown, the thickness direction of the battery cell is parallel to the second direction D2, so that the flow direction of the coolant is perpendicular to the thickness direction of the battery cell, thereby improving the cooling effect.

[0068] The first side plate 1215 and the second side plate 1216 are spaced apart along the first direction D1 . The first side plate 1215 is sealedly connected to the top plate 1211 and the bottom plate 1212 , respectively. The second side plate 1216 is sealedly connected to the top plate 1211 and the bottom plate 1212 , respectively.

[0069] The end of the first side plate 1215 near the front seal 1213 is spaced apart from the front seal 1213, and the end of the first side plate 1215 near the rear seal 1214 is also spaced apart from the rear seal 1214. The end of the second side plate 1216 near the front seal 1213 is sealedly connected to the front seal 1213, and the end of the second side plate 1216 near the rear seal 1214 is also sealedly connected to the rear seal 1214.

[0070] It should be noted that, in other embodiments, when the liquid cooling plate group 120 includes only one liquid cooling plate 121, the first side plate 1215 is replaced by the second side plate 1216, so that the liquid cooling plate 121 is sealed as a whole, and the liquid inlet 12111 of the liquid cooling plate 121 is set on the top plate 1211, and the liquid outlet 12134 is set on the front end seal 1213.

[0071] In some embodiments, the liquid cooling plate 121 further includes a liquid inlet channel wall 1217 .

[0072] like Figure 4 As shown, the liquid inlet channel wall 1217 connects the top plate 1211 and the bottom plate 1212, and the liquid inlet channel wall 1217 and the first side plate 1215 are arranged parallel and spaced apart along the first direction D1 to form a liquid inlet channel P1. The liquid flow direction of the liquid inlet channel P1 is from the front seal 1213 to the rear seal 1214.

[0073] The liquid inlet end of the liquid inlet channel P1 is formed on a side of the first side plate 1215 near the front seal 1213. For example, the end of the first side plate 1215 is spaced apart from the front seal 1213 to form the liquid inlet end of the liquid inlet channel P1. One end of the liquid inlet channel wall 1217 is connected to the front seal 1213, separating the liquid inlet end of the liquid inlet channel P1 from the liquid outlet channel P2.

[0074] The liquid outlet of the liquid inlet channel P1 is formed on one side of the liquid inlet channel wall 1217 near the rear end seal 1214. For example, the other end of the liquid inlet channel wall 1217 is spaced apart from the rear end seal 1214 to form the liquid outlet of the liquid inlet channel P1, so that the coolant flows out of the liquid inlet channel P1 and then flows along the rear end seal 1214 to each liquid outlet channel P2.

[0075] In some embodiments, when two liquid cooling plates 121 are connected, the two first side plates 1215 of the two liquid cooling plates 121 are connected so that the liquid inlet ends of the two liquid inlet channels P1 are in communication.

[0076] Specifically, the side surfaces 133 of the two first side plates 1215 are sealed and connected, and the two liquid inlet channel walls 1217 are symmetrically arranged on both sides of the first side plate 1215. The ends of the liquid inlet channel walls 1217 are also sealed and connected to the front end seal 1213, so that the liquid inlet ends of the two liquid inlet channels P1 are combined into a liquid inlet end in the shape of a "concave".

[0077] The two top plates 1211 of the two liquid cooling plates 121 are sealed and connected. A liquid inlet 12111 is provided on the top plate 1211 . The liquid inlet 12111 is provided corresponding to the liquid inlet end of the liquid inlet channel P1 .

[0078] The liquid inlet 12111 is located at the connection between the liquid inlet ends of the two liquid inlet channels P1, so that the liquid inlet 12111 is connected to the two liquid inlet channels P1. In this way, the coolant flowing into the liquid inlet 12111 flows into the two liquid cooling plates 121 simultaneously, improving the filling and renewal efficiency of the coolant in the liquid cooling plate assembly 120.

[0079] In some embodiments, the liquid cooling plate 121 further includes a plurality of liquid outlet channel walls 1218 .

[0080] like Figure 4 As shown, multiple liquid outlet channel walls 1218 are arranged between the second side plate 1216 and the liquid inlet channel wall 1217. The liquid outlet channel wall 1218 is parallel to the liquid inlet channel wall 1217. The multiple liquid outlet channel walls 1218 are spaced apart along the first direction D1 to form multiple liquid outlet channels P2.

[0081] It is understandable that Figure 3 As shown, the liquid inlet channels P1 of the two liquid cooling plates 121 are distributed in a mirror image, and the liquid outlet channels P2 of the two liquid cooling plates 121 are distributed in a mirror image.

[0082] The liquid inlet channel wall 1217 and the liquid outlet channel wall 1218 are respectively connected between the top plate 1211 and the bottom plate 1212, and also support the top plate 1211, thereby increasing the structural strength and IP67 protection of the liquid cooling plate 121, so that the liquid cooling plate 121 can support the load-bearing installation of the battery pack 110.

[0083] In this embodiment, one end of the liquid outlet channel wall 1218 is spaced apart from the rear end sealing member 1214 to form a liquid inlet end of the liquid outlet channel P2.

[0084] The liquid outlet end of the liquid outlet channel P2 is formed on a side of the liquid outlet channel wall 1218 close to the front seal 1213. For example, the end of the liquid outlet channel wall 1218 is spaced apart from the front seal 1213 to form the liquid outlet end of the liquid outlet channel P2. The direction of liquid flow in the liquid outlet channel P2 is from the rear seal 1214 to the front seal 1213.

[0085] In this embodiment, the liquid inlet channel wall 1217 and the liquid outlet channel wall 1218 are both straight for ease of processing. In other embodiments, the liquid inlet channel wall 1217 or the liquid outlet channel wall 1218 can also be curved to adjust the flow rate of the coolant in the flow channel.

[0086] In some embodiments, as Figure 4 As shown, in the direction approaching the second side plate 1216, the spacing distance between the liquid outlet channel wall 1218 and the front end sealing member 1213 becomes smaller.

[0087] It is understood that the cooling capacity of the liquid cooling plate 121 is related to the flow rate and flow velocity of the coolant. By reducing the distance between the outlet channel wall 1218 and the front seal 1213, the flow velocity of the coolant in the outlet channel P2 is gradually increased, making the flow rate of the coolant flowing through each outlet channel P2 similar per unit time, achieving a uniform cooling effect across the entire liquid cooling plate 121.

[0088] In some embodiments, the front end seal 1213 has a hollow sealed cavity structure, and a liquid guide channel 12133 is provided on the side of the front end seal 1213 close to the liquid outlet channel P2, and the liquid guide channel 12133 is connected to the liquid outlet channel P2. A liquid outlet 12134 is provided on the side of the front end seal 1213 away from the liquid outlet channel P2, so that the coolant in each liquid outlet channel P2 converges into the front end seal 1213 and then flows out from the liquid outlet 12134, thereby realizing the circulation of the coolant.

[0089] In some embodiments, as Figure 4 and Figure 5 As shown, the front end seal 1213 includes a baffle 12131 and a receiving cavity 12132 .

[0090] The baffle 12131 is sealed with the top plate 1211 and the bottom plate 1212 to prevent liquid leakage.

[0091] A liquid guiding channel 12133 is defined on the baffle 12131 . The liquid guiding channel 12133 connects the accommodating cavity 12132 and the liquid outlet channel, so that the coolant flowing out of each liquid outlet channel P2 is collected into the front end seal 1213 .

[0092] like Figure 4 As shown, the front seals 1213 of the two liquid cooling plates 121 are interconnected and integrally arranged, improving the sealing performance of the liquid cooling plate assembly 120. A liquid guide channel 12133 is provided on the baffle 12131, corresponding to each liquid cooling plate 121. The liquid guide channel 12133 is provided near the second side plate 1216.

[0093] Exemplarily, the liquid guiding channel 12133 is a plurality of through holes closely arranged on the baffle 12131 .

[0094] The accommodating cavity 12132 is provided with a liquid outlet 12134, which is arranged above the accommodating cavity 12132 or on a side away from the battery pack 110, so that the liquid inlet 12111 and the liquid outlet 12134 of the liquid cooling plate group 120 are close to each other, which is convenient for connecting an external cooling liquid circulation system.

[0095] In some embodiments, the rear end seal 1214 is plate-shaped, and the rear end seals 1214 of the two liquid cooling plates 121 are connected and integrally arranged to improve sealing performance.

[0096] In some embodiments, the battery pack 100 further includes a fixing member 130 .

[0097] There are multiple fixing members 130 , and the battery pack 110 is connected to the fixing members 130 so that the battery pack 110 is fixed on the liquid cooling plate 121 .

[0098] In the related art, it is necessary to first weld the fixing part 130 to the top plate 1211, and then assemble the battery pack 110 to the top plate 1211. The weld between the fixing part 130 and the top plate 1211 abuts against the corner of the battery cell. When the battery pack 100 shakes, there is a risk of the battery cell being broken by the weld.

[0099] like Figure 3 and Figure 6 As shown, the fixing member 130 is provided on the top plate 1211 , and the end edge of the fixing member 130 close to the top plate 1211 is recessed inward to form an escape space 134 , so that the weld between the fixing member 130 and the top plate 1211 is accommodated in the escape space 134 to prevent the battery cell from being damaged.

[0100] Specifically, the fixing member 130 has a bottom surface 131, a connecting surface 132 and a side surface 133 connected in sequence, the bottom surface 131 is connected to the top plate 1211, the side surface 133 and the top plate 1211 are spaced apart along the third direction D3, and the avoidance space 134 is formed between the connecting surface 132 and the bottom surface 131.

[0101] Optionally, the connecting surface 132 is an inclined surface, a curved surface or an angular surface.

[0102] In some embodiments, the battery pack 100 further includes a top cover 140 .

[0103] In some embodiments, the upper cover 140 is a plastic upper cover 140 , thereby reducing the overall weight of the battery pack 100 .

[0104] The upper cover 140 is connected to the edge of the liquid cooling plate assembly 120. Specifically, Figure 1 and Figure 7 As shown, the upper cover 140 includes a main body 141 and an outer flange 142 disposed around the main body 141 , and the battery pack 110 is accommodated in the main body 141 .

[0105] A connecting frame 122 is provided on the outer periphery of the liquid cooling plate assembly 120 , and the connecting frame 122 is threadedly connected to the outer flange 142 .

[0106] The side surface 133 of the main body 141 is provided with a plurality of spaced-apart reinforcing ribs 1411 , and a connecting hole 1421 is provided on the outer flange 142 corresponding to each reinforcing rib 1411 , so that the reinforcing rib 1411 not only improves the strength of the upper cover 140 , but also serves as an assembly position for the connecting bolts, thereby improving the assembly efficiency of the upper cover 140 and the liquid cooling plate 121 .

[0107] In some embodiments, a reinforcement structure is also provided on the top surface of the upper cover 140 to enhance the overall impact resistance of the battery pack 100 .

[0108] The present application also provides an electrical device, including the battery pack 100 in any of the above embodiments. Therefore, it has all the beneficial effects of the battery pack 100 in any of the above embodiments, which will not be described in detail here.

[0109] The electrical device uses Figure 1 The battery pack 100 shown, the electrical devices may include but are not limited to backup power supplies, motors, electric vehicles, electric motorcycles, power-assisted bicycles, bicycles, power tools, large household batteries, etc.

[0110] Example 2

[0111] like Figure 4 and Figure 8 As shown, compared with the first embodiment, the difference of this embodiment is that the liquid cooling plate group 120 of this embodiment includes three liquid cooling plates 121. Figure 8 As described above, the three liquid cooling plates 121 are respectively the left liquid cooling plate 121, the middle liquid cooling plate 121 and the right liquid cooling plate 121, wherein the flow channels in the left liquid cooling plate 121 and the right liquid cooling plate 121 are mirror-set, and the flow channel of the middle liquid cooling plate 121 is symmetrically set.

[0112] Specifically, the intermediate liquid cooling plate 121 includes a top plate 1211, a bottom plate 1212, a front seal 1213, a rear seal 1214 and two first side plates 1215. The second side plate 1216 of the intermediate liquid cooling plate 121 is replaced by the first side plate 1215, so that the liquid inlet end of the liquid inlet channel P1 between the left liquid cooling plate 121 and the middle liquid cooling plate 121 is connected, and the liquid inlet end of the liquid inlet channel P1 between the right liquid cooling plate 121 and the middle liquid cooling plate 121 is connected, forming two "concave" shaped liquid inlet ends.

[0113] The liquid cooling plate group 120 of the present application is provided with two liquid inlets 12111, one liquid inlet 12111 is connected to the connection between the liquid inlet channel P1 of the left liquid cooling plate 121 and the liquid inlet channel P1 of the middle liquid cooling plate 121, and the other liquid inlet 12111 is connected to the connection between the liquid inlet channel P1 of the right liquid cooling plate 121 and the liquid inlet channel P1 of the middle liquid cooling plate 121.

[0114] A liquid guide channel 12133 is provided on the front sealing member 1213 , corresponding to the left liquid cooling plate 121 , the middle liquid cooling plate 121 , and the right liquid cooling plate 121 .

[0115] There are two liquid outlets 12134 on the front sealing member 1213 , one close to the left liquid cooling plate 121 and the other close to the right liquid cooling plate 121 .

[0116] By providing two liquid inlets 12111 and two liquid outlets 12134 , the coolant in the three liquid cooling plates 121 is simultaneously refreshed, thereby increasing the cooling area of ​​the liquid cooling plate assembly 120 and improving the cooling efficiency of the liquid cooling plate assembly 120 .

[0117] Example 3

[0118] like Figure 4 and Figure 9 As shown, compared with the first embodiment, the difference of this embodiment is that the liquid cooling plate assembly 120 of this embodiment is formed by splicing two liquid cooling plate assemblies 120 of the first embodiment along the first direction D1, thereby improving the assembly efficiency of the liquid cooling plate assembly 120.

[0119] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0120] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery pack (100), characterized in that: include: Battery pack (110); A liquid cooling plate group (120), wherein the battery group (110) is arranged on the liquid cooling plate group (120), and the liquid cooling plate group (120) includes at least two liquid cooling plates (121), wherein the at least two liquid cooling plates (121) are arranged in a first direction (D1), and the sides of two adjacent liquid cooling plates (121) are connected, and a liquid inlet channel (P1) and a plurality of liquid outlet channels (P2) are formed in the liquid cooling plate (121), and the plurality of liquid outlet channels (P2) are respectively connected to the liquid inlet channel (P1).

2. The battery pack (100) according to claim 1, characterized in that The liquid cooling plate (121) comprises: a top plate (1211), the battery pack (110) being arranged on the top plate (1211); a bottom plate (1212), the bottom plate (1212) being arranged on a side of the top plate (1211) away from the battery pack (110) and spaced apart from the top plate (1211); a front seal (1213) and a rear seal (1214), wherein the front seal (1213) connects the top plate (1211) and the bottom plate (1212), and the rear seal (1214) connects the top plate (1211) and the bottom plate (1212), and the front seal (1213) and the rear seal (1214) are spaced apart along a second direction (D2), and the first direction (D1) and the second direction (D2) are perpendicular; A first side plate (1215) and a second side plate (1216), wherein the first side plate (1215) connects the top plate (1211) and the bottom plate (1212), and the second side plate (1216) connects the top plate (1211) and the bottom plate (1212), and the first side plate (1215) and the second side plate (1216) are spaced apart along the first direction (D1).

3. The battery pack (100) according to claim 2, characterized in that: The liquid cooling plate (121) further comprises: The liquid inlet channel wall (1217) is arranged parallel to and spaced from the first side plate (1215) along the first direction (D1) to form the liquid inlet channel (P1), the liquid inlet end of the liquid inlet channel (P1) is formed on a side of the first side plate (1215) close to the front end seal (1213), and the liquid outlet end of the liquid inlet channel (P1) is formed on a side of the liquid inlet channel wall (1217) close to the rear end seal (1214).

4. The battery pack (100) according to claim 3, characterized in that: When the two liquid cooling plates (121) are connected, the two first side plates (1215) are connected, and the liquid inlet ends of the two liquid inlet channels (P1) are communicated; The two top plates (1211) are sealed and connected. A liquid inlet (12111) is provided on one side of the top plate (1211) close to the front seal (1213). The liquid inlet (12111) is also provided corresponding to the liquid inlet end of the liquid inlet channel (P1), so that the liquid inlet (12111) and the two liquid inlet channels (P1) are in communication.

5. The battery pack (100) according to claim 3, characterized in that: The liquid cooling plate (121) further comprises: a plurality of liquid outlet channel walls (1218), the plurality of liquid outlet channel walls (1218) being arranged between the second side plate (1216) and the liquid inlet channel wall (1217), the liquid outlet channel wall (1218) being arranged parallel to the liquid inlet channel wall (1217), and the plurality of liquid outlet channel walls (1218) being arranged at intervals along the first direction (D1) to form a plurality of liquid outlet channels (P2); The end of the liquid outlet channel wall (1218) is spaced apart from the rear end seal (1214) to form the liquid inlet end of the liquid outlet channel (P2), and the liquid inlet end of the liquid outlet channel (P2) is connected to the liquid outlet end of the liquid inlet channel (P1); The liquid outlet end of the liquid outlet channel (P2) is formed on a side of the liquid outlet channel wall (1218) close to the front end seal (1213).

6. The battery pack (100) according to claim 5, characterized in that: In the direction approaching the second side plate (1216), the distance between the liquid outlet channel wall (1218) and the rear end seal (1214) gradually decreases.

7. The battery pack (100) according to any one of claims 2 to 6, characterized in that: The front end seal (1213) has a hollow sealed cavity structure, a liquid guide channel (12133) is provided on a side of the front end seal (1213) close to the liquid outlet channel (P2), the liquid guide channel (12133) is connected to the liquid outlet channel (P2), and a liquid outlet (12134) is provided on a side of the front end seal (1213) away from the liquid outlet channel (P2).

8. The battery pack (100) according to any one of claims 2 to 6, characterized in that: The battery pack (100) further comprises a fixing member (130), wherein the fixing member (130) is provided on the top plate (1211), and an end edge of the fixing member (130) close to the top plate (1211) is recessed inward to form an escape space (134).

9. The battery pack (100) according to any one of claims 1 to 6, characterized in that: The battery pack (100) further includes an upper cover (140); The upper cover (140) includes a main body (141) and an outer flange (142); the battery pack (110) is accommodated in the main body (141); the outer flange (142) is connected to the edge of the liquid cooling plate group (120); a side surface (133) of the main body (141) is provided with a plurality of spaced reinforcing ribs (1411); and a connection hole (1421) is provided on the outer flange (142) corresponding to each reinforcing rib (1411).

10. An electrical device, characterized in that: A battery pack (100) comprising any one of claims 1 to 9.

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