Battery pack and electric device

Abstract

The embodiment of the utility model relates to the technical field of batteries, and particularly discloses a battery pack and a power utilization device, and the battery pack comprises a box body which is provided with a containing cavity; the box cover is arranged on one side of the box body in the first direction; the plurality of single batteries are arranged in the accommodating cavity, each single battery comprises a battery body and a pole, the battery body is provided with a first outer wall surface and a second outer wall surface which are oppositely arranged in the first direction, the first outer wall surface is close to the box cover relative to the second outer wall surface, and the pole is arranged on the first outer wall surface; the first liquid cooling piece covers the first outer wall surface, a plurality of liquid cooling holes are formed in the first liquid cooling piece, and each pole penetrates through one corresponding liquid cooling hole; and the second liquid cooling piece covers the second outer wall surface. According to the battery pack, the heat dissipation efficiency and the heat dissipation uniformity of the single batteries in the battery pack are improved, the heat dissipation capability of the single batteries in the battery pack is improved, and the safety performance of the battery pack is ensured.

Description

Technical Field

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

[0002] With the rapid development of mobile phones, laptops, electric vehicles, power tools, and other electronic devices, battery packs with high capacity, long cycle life, and high safety performance have been widely used and developed. Simultaneously, the demand for battery packs with even larger capacity, greater durability, and enhanced safety is extremely urgent. Safety performance is a core performance characteristic of battery packs. Therefore, improving the safety performance of battery packs has become a pressing issue that needs to be addressed. Utility Model Content

[0003] The embodiments of this application provide a battery pack and an electrical device to improve the heat dissipation efficiency and heat dissipation uniformity of individual cells in the battery pack, thereby enhancing the heat dissipation capacity of individual cells in the battery pack and ensuring the safety performance of the battery pack.

[0004] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions:

[0005] On one hand, a battery pack is provided, having a first orientation, including:

[0006] The box body is equipped with a receiving cavity;

[0007] The lid is located on one side of the box body in the first direction;

[0008] Multiple individual batteries are disposed in a receiving cavity, and each individual battery includes: a battery body and a terminal post. The battery body has a first outer wall surface and a second outer wall surface disposed opposite to each other in a first direction. The first outer wall surface is disposed close to the cover relative to the second outer wall surface, and the terminal post is disposed on the first outer wall surface.

[0009] A first liquid cooling component covers the first outer wall surface. The first liquid cooling component has multiple liquid cooling holes, and each electrode post passes through a corresponding liquid cooling hole. The first liquid cooling component is thermally connected to both the first outer wall surface and the electrode post.

[0010] The second liquid cooling component covers the second outer wall surface and is thermally connected to the second outer wall surface of the single cell.

[0011] In addition to one or more of the features disclosed above, or as an alternative, the first liquid cooling component has a first liquid cooling channel, and a portion of the first liquid cooling channel surrounds the outer periphery of each liquid cooling hole.

[0012] In addition to one or more of the features disclosed above, or alternatively, the battery pack also has a second direction intersecting the first direction;

[0013] Multiple individual cells are arranged along the second direction to form a battery pack;

[0014] The first liquid cooling component includes: a first liquid cooling part, a second liquid cooling part, and a connecting part. The first liquid cooling part and the second liquid cooling part both extend along a second direction, and the connecting part is connected to one side of the first liquid cooling part and the second liquid cooling part in the second direction.

[0015] The liquid cooling hole includes a first sub-liquid cooling hole and a second sub-liquid cooling hole. The first sub-liquid cooling hole is opened in the first liquid cooling section, and the second sub-liquid cooling hole is opened in the second liquid cooling section. Part of the electrode is inserted through the first sub-liquid cooling hole, and the other part of the electrode is inserted through the second sub-liquid cooling hole.

[0016] In addition to one or more of the features disclosed above, or as an alternative, a first sub-liquid cooling channel is provided in the first liquid cooling section, a second sub-liquid cooling channel is provided in the second liquid cooling section, and a third sub-liquid cooling channel is provided in the connecting section. The first sub-liquid cooling channel, the second sub-liquid cooling channel and the third sub-liquid cooling channel are connected to form the first liquid cooling channel.

[0017] A portion of the first sub-liquid cooling channels are arranged around the outer periphery of each first sub-liquid cooling hole; and / or,

[0018] Part of the second sub-liquid cooling channels are arranged around the outer periphery of each second sub-liquid cooling hole.

[0019] In addition to one or more of the features disclosed above, or alternatively, the battery pack also has a second direction and a third direction that intersect the first direction in pairs;

[0020] Multiple individual cells are arranged along a second direction to form a battery pack, and the number of battery packs is set to be multiple, with multiple battery packs arranged along a third direction.

[0021] The number of first liquid cooling components is set to multiple, and the multiple first liquid cooling components are arranged at intervals along a third direction. Each first liquid cooling component covers the first outer wall surface of a single cell in a corresponding battery pack.

[0022] In addition to one or more of the features disclosed above, or as an alternative, the housing includes: a bottom plate, side beams and crossbeams, the side beams being arranged around the edge of the bottom plate and the bottom plate and side beams cooperating to enclose a receiving cavity, the crossbeams extending along a third direction and disposed within the receiving cavity, the crossbeams being connected to the side beams;

[0023] The crossbeam is equipped with an inlet channel and an outlet channel, which are separated from each other.

[0024] The first liquid cooling component further includes: an inlet pipe and an outlet pipe spaced apart. The inlet pipe is connected to the side of the first liquid cooling component near the side beam, and the inlet pipe connects the first liquid cooling channel to the inlet channel. The outlet pipe is connected to the side of the first liquid cooling component near the side beam, and the outlet pipe connects the first liquid cooling channel to the outlet channel.

[0025] In addition to one or more of the features disclosed above, or as an alternative, the battery pack may further include: a thermally conductive adhesive layer disposed between the terminal post and the wall of the liquid cooling hole, and the thermally conductive adhesive layer being connected to both the outer wall of the terminal post and the wall of the liquid cooling hole.

[0026] In addition to one or more of the features disclosed above, or as an alternative, it also includes: a plurality of electrical connectors disposed on the side of the first liquid cooling component away from the first outer wall surface, and each electrical connector being electrically connected to the terminal of a corresponding single cell, and the electrical connectors being thermally connected to the first liquid cooling component.

[0027] In addition to one or more of the features disclosed above, or as an alternative, the second liquid cooling component has a second liquid cooling flow channel;

[0028] The battery pack also includes a main liquid inlet pipe and a main liquid outlet pipe. The main liquid inlet pipe is connected to the liquid inlet end of the liquid inlet channel and the liquid inlet end of the second liquid cooling channel, respectively. The main liquid outlet pipe is connected to the liquid outlet end of the liquid outlet channel and the liquid outlet end of the second liquid cooling channel, respectively.

[0029] On the other hand, a further electrical device is disclosed, which, in addition to one or more of the features disclosed above, or as an alternative, includes a battery pack as described in any of the preceding claims, the battery pack serving as a power source for the electrical device.

[0030] One of the above technical solutions has the following advantages or beneficial effects: This application opens liquid cooling holes in the first liquid cooling component and inserts the electrode post through the liquid cooling holes, so that the first liquid cooling component simultaneously cools and dissipates heat from the battery body and the electrode post. This effectively shortens the heat conduction path between the top areas of the electrode post and the battery body and the first liquid cooling component, effectively reducing the maximum temperature of the individual battery during high-rate charging and discharging, improving the heat dissipation efficiency and uniformity of the individual battery, enhancing the heat dissipation capacity of the individual batteries in the battery pack, and ensuring the safety performance of the battery pack. Simultaneously, this application reduces the space occupied by the first liquid cooling component, improving the space utilization rate of the individual batteries in the battery pack, thereby increasing the energy density of the battery pack. Furthermore, this application also includes a second liquid cooling component, which cools and dissipates heat from the second outer wall surface of the individual battery, allowing the first and second liquid cooling components to jointly cool and dissipate heat from the individual battery, further enhancing the heat dissipation capacity of the individual batteries in the battery pack, thereby improving the liquid cooling efficiency of the battery pack, reducing the temperature rise during normal operation of the battery pack, and further ensuring the safety performance of the battery pack. Attached Figure Description

[0031] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0032] Figure 1 This is a three-dimensional structural view of the battery pack provided according to an embodiment of this application;

[0033] Figure 2 This is an exploded structural view of a battery pack according to an embodiment of this application;

[0034] Figure 3 This is a three-dimensional structural view of the battery pack after the hidden cover is provided according to the embodiments of this application;

[0035] Figure 4 This is a three-dimensional structural view of the battery pack, the first liquid cooler, and the electrical connector provided according to an embodiment of this application;

[0036] Figure 5 This is an exploded structural view of the battery pack, the first liquid cooler, and the electrical connector provided according to an embodiment of this application;

[0037] Figure 6 yes Figure 4 A cross-sectional view of the battery pack, the first liquid cooler, and the electrical connector along the AA direction;

[0038] Figure 7 yes Figure 6 A magnified view of a section at point C;

[0039] Figure 8 This is a structural schematic diagram of the first liquid cooling component provided according to an embodiment of this application;

[0040] Figure 9 This is a cross-sectional view of the first liquid cooling component provided according to an embodiment of this application;

[0041] Figure 10 This is a top view of the housing and the second liquid cooling component provided according to an embodiment of this application;

[0042] Figure 11 This is a cross-sectional view of the housing and the second liquid cooling component along the BB direction according to the embodiments of this application;

[0043] Figure 12 yes Figure 11 A magnified view of a section at point D.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100. Battery pack;

[0046] 110. Box body; 111. Receiving cavity; 112. Base plate; 113. Side beam; 114. Crossbeam; 1141. Liquid inlet channel; 1142. Liquid outlet channel;

[0047] 120. Battery pack; 121. Single cell; 1211. Battery body; 1212. Terminal; 1213. First outer wall surface; 1214. Second outer wall surface;

[0048] 130. Box lid;

[0049] 140. First liquid cooling component; 141. First liquid cooling section; 142. Second liquid cooling section; 143. Connecting part; 144. Liquid cooling hole; 1441. First sub-liquid cooling hole; 1442. Second sub-liquid cooling hole; 145. First liquid cooling channel; 1451. First sub-liquid cooling channel; 1452. Second sub-liquid cooling channel; 1453. Third sub-liquid cooling channel; 146. Liquid inlet pipe section; 147. Liquid outlet pipe section;

[0050] 150. Second liquid cooling component; 151. Second liquid cooling flow channel;

[0051] 160. Thermally conductive adhesive layer;

[0052] 170. Electrical connectors;

[0053] 181. Main inlet pipe; 182. Main outlet pipe. Detailed Implementation

[0054] To make the objectives, technical solutions, and beneficial effects of this application clearer, the following detailed description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this application. It should be understood that the specific embodiments described in this specification are merely for explaining this application and are not intended to limit it.

[0055] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] Lithium-ion batteries are highly temperature-sensitive; excessively high or low operating temperatures can impair cycle life, reliability, and safety, and severely damage their charging and discharging capabilities. During charging and discharging, heat sources in a battery pack can be broadly categorized into heat generation from the battery core, mechanical components, and busbars. With the development of fast-charging technology, charging currents can typically reach hundreds of amps or even higher, leading to significant Joule heating in the mechanical components and busbars. This heat accumulation often causes localized overheating in the battery core, and existing bottom-cooling and large-area cooling methods are insufficient to quickly and effectively dissipate heat from the mechanical components and busbars, thus affecting the battery pack's safety performance.

[0059] To address the aforementioned problems, in the embodiments of this application, reference is made to... Figures 1 to 3 This application provides a battery pack 100, which has a first direction Z, a second direction X, and a third direction Y that intersect each other in pairs. Exemplarily, in this application, the battery pack 100 has a first direction Z, a second direction X, and a third direction Y that are perpendicular to each other in pairs. Here, "perpendicular" refers to a state where the angle formed by a line and a line, a line and a surface, or a surface and a surface is 89° to 91°.

[0060] Specifically, refer to Figures 1 to 7 The battery pack 100 includes: a housing 110, a single battery cell 121, a housing cover 130, a first liquid cooling component 140, and a second liquid cooling component 150.

[0061] Specifically, the housing 110 is provided with a receiving cavity 111; the housing cover 130 is provided on one side of the housing 110 in the first direction Z to seal the receiving cavity 111; multiple individual batteries 121 are provided, and the multiple individual batteries 121 are disposed in the receiving cavity 111, and the individual battery 121 includes: a battery body 1211 and a terminal post 1212, the battery body 1211 has a first outer wall surface 1213 and a second outer wall surface 1214 disposed opposite to each other in the first direction Z, the first outer wall surface 1213 is disposed close to the housing cover 130 opposite to the second outer wall surface 1214, and the terminal post 1212 is disposed on the first outer wall surface 1213; the first liquid cooling component 140 covers... Covering the first outer wall surface 1213, the first liquid cooling component 140 has multiple liquid cooling holes 144, and each electrode post 1212 passes through a corresponding liquid cooling hole 144. The first liquid cooling component 140 is thermally connected to both the first outer wall surface 1213 and the electrode post 1212. The first liquid cooling component 140 is used for liquid cooling heat dissipation of the first outer wall surface 1213 and the electrode post 1212 of the single cell 121. The second liquid cooling component 150 covers the second outer wall surface 1214 and is thermally connected to the second outer wall surface 1214 of the single cell 121. The second liquid cooling component 150 is used for liquid cooling heat dissipation of the second outer wall surface 1214 of the single cell 121.

[0062] The battery pack 100 can be a three-tiered battery pack 100 consisting of individual cells 121, battery modules, and a battery pack. Specifically, the individual cells 121 are first grouped into battery modules, and then the battery modules are placed inside the housing 110 to form the battery pack 100. Alternatively, it can be a two-tiered battery pack 100 consisting of individual cells and a battery pack, where the individual cells 121 are directly housed inside the housing 110 to form the battery pack. No specific limitations are imposed in this application; the design can be tailored to the specific circumstances, as long as it does not affect the effectiveness of this application.

[0063] The enclosure 110 is made of ordinary steel or aluminum, but is not limited to these materials.

[0064] The lid 130 is made of metal, but is not limited to that.

[0065] The single cell 121 can be a rechargeable battery, which refers to a single cell that can be recharged after discharge to activate the active materials and continue to be used. For example, the single cell 121 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, or nickel-cadmium battery, but is not limited to these.

[0066] The single cell 121 can be a prismatic cell, a pouch cell, or a cell of other shapes. For example, in this application, the single cell 121 is a square lithium-ion cell.

[0067] The single-cell battery 121 also includes electrode components, electrolyte, casing, end caps, and other functional components. The electrolyte can be a conventional electrolyte or a special electrolyte with additives, used to wet the electrode components. The electrode components are the parts in the single-cell battery 121 where electrochemical reactions occur, and there can be one or more electrode components. The electrode components are mainly formed by stacking or winding positive electrode sheets, separators, and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body, while the portions of the positive and negative electrode sheets without active material each constitute a tab. During the charging and discharging process of the single-cell battery 121, the positive and negative active materials react with the electrolyte, and the tabs are electrically connected to the terminals 1212 to form a current loop, enabling the single-cell battery 121 to function normally.

[0068] Among them, the terminal 1212 can be a positive terminal or a negative terminal. This application does not make a specific limitation and can be selected according to the actual situation.

[0069] The first liquid cooling component 140 may be made of plastic or other insulating materials, but is not limited to these.

[0070] The second liquid cooling component 150 may be made of any one of copper, aluminum or stainless steel, but is not limited to this.

[0071] Understandably, this application utilizes liquid cooling holes 144 formed in the first liquid cooling component 140, through which the terminal post 1212 passes, to simultaneously cool the battery body 1211 and the terminal post 1212. This effectively shortens the heat conduction path between the top areas of the terminal post 1212 and the battery body 1211 and the first liquid cooling component 140, effectively reducing the maximum temperature of the single battery cell 121 during high-rate charging and discharging, improving the heat dissipation efficiency and uniformity of the single battery cell 121, enhancing the heat dissipation capacity of the single battery cell 121 in the battery pack 100, and ensuring the safety performance of the battery pack 100. Simultaneously, this application... The space occupied by the first liquid cooling component 140 is reduced, improving the space utilization of the individual battery cells 121 in the battery pack 100, thereby increasing the energy density of the battery pack. At the same time, the present application also provides a second liquid cooling component 150, which is used to liquid cool the second outer wall surface 1214 of the individual battery cells 121. This allows the first liquid cooling component 140 and the second liquid cooling component 150 to jointly cool the individual battery cells 121, further improving the heat dissipation capacity of the individual battery cells 121 in the battery pack 100, thereby improving the liquid cooling efficiency of the battery pack 100, reducing the temperature rise of the battery pack 100 during normal operation, and further ensuring the safety performance of the battery pack 100.

[0072] In some embodiments, refer to Figures 8 to 9 The first liquid cooling component 140 has a first liquid cooling channel 145 for circulating coolant, which can be a mixture of water and ethanol. A portion of the first liquid cooling channel 145 surrounds the outer periphery of each liquid cooling hole 144, meaning the first liquid cooling channel 145 can completely surround each liquid cooling hole 144, or it can partially surround each liquid cooling hole 144.

[0073] This application further shortens the heat conduction path between the electrode post 1212 and the first liquid cooling component 140 by surrounding a portion of the first liquid cooling channel 145 around the outer periphery of each liquid cooling hole 144. This effectively reduces the maximum temperature of the single cell 121 during high-rate charging and discharging, avoids local high temperature phenomena in the single cell 121, further improves the heat dissipation efficiency and heat dissipation uniformity of the single cell 121, improves the heat dissipation capacity of the single cell 121 in the battery pack 100, and ensures the safety performance of the battery pack 100.

[0074] In some embodiments, refer to Figures 4 to 7 Multiple individual cells 121 are arranged along the second direction X to form a battery pack 120.

[0075] Specifically, the first liquid cooling component 140 includes a first liquid cooling part 141, a second liquid cooling part 142, and a connecting part 143. The first liquid cooling part 141 and the second liquid cooling part 142 both extend along the second direction X, and the connecting part 143 is connected to the first liquid cooling part 141 and the second liquid cooling part 142 on one side of the second direction X.

[0076] The first liquid cooling section 141, the second liquid cooling section 142, and the connecting section 143 can be integrally formed, meaning they form a single, integrated structure. Alternatively, the first liquid cooling section 141, the second liquid cooling section 142, and the connecting section 143 can be separately configured and fixedly connected in pairs. For example, the connecting sections 143 are fixedly connected to the first liquid cooling section 141 and the second liquid cooling section 142 respectively through welding or other processes. No specific limitations are imposed in this application; the configuration can be tailored to the actual situation. For example, in this application, the liquid cooling section 141, the second liquid cooling section 142, and the connecting section 143 are integrally die-cast.

[0077] Specifically, the liquid cooling hole 144 includes a first sub-liquid cooling hole 1441 and a second sub-liquid cooling hole 1442. The first sub-liquid cooling hole 1441 is opened in the first liquid cooling section 141, and the second sub-liquid cooling hole 1442 is opened in the second liquid cooling section 142. A portion of the electrode post 1212 passes through the first sub-liquid cooling hole 1441, and another portion of the electrode post 1212 passes through the second sub-liquid cooling hole 1442.

[0078] The first sub-liquid cooling hole 1441 and the second sub-liquid cooling hole 1442 can be circular or polygonal, but are not limited to these.

[0079] Understandably, this application provides a first sub-liquid cooling hole 1441 and a second sub-liquid cooling hole 1442 on the first liquid cooling component 140, so that different terminals 1212 on different individual cells 121 pass through the first sub-liquid cooling hole 1441 and the second sub-liquid cooling hole 1442 respectively, thereby shortening the heat conduction path between the different terminals 1212 and the first liquid cooling component 140, further improving the heat dissipation efficiency and heat dissipation uniformity of the individual cells 121, improving the heat dissipation capacity of the individual cells 121 in the battery pack 100, and ensuring the safety performance of the battery pack 100.

[0080] In some embodiments, refer to Figures 4 to 9 A first sub-liquid cooling channel 1451 is provided in the first liquid cooling section 141, a second sub-liquid cooling channel 1452 is provided in the second liquid cooling section 142, and a third sub-liquid cooling channel 1453 is provided in the connecting section 143. The first sub-liquid cooling channel 1451, the second sub-liquid cooling channel 1452 and the third sub-liquid cooling channel 1453 are connected to form the first liquid cooling channel 145.

[0081] Specifically, a portion of the first sub-liquid cooling channels 1451 are arranged around the outer periphery of each first sub-liquid cooling hole 1441, that is, the first sub-liquid cooling channels 1451 completely surround the first sub-liquid cooling holes 1441, effectively increasing the liquid cooling heat conduction area between the first sub-liquid cooling channels 1451 and the electrode post 1212, further effectively shortening the heat conduction path between each electrode post 1212 and the first liquid cooling component 140, further improving the heat dissipation efficiency and heat dissipation uniformity of the single cell 121, improving the heat dissipation capacity of the single cell 121 in the battery pack 100, and ensuring the safety performance of the battery pack 100.

[0082] A portion of the second sub-liquid cooling channels 1452 are arranged around the outer periphery of each second sub-liquid cooling hole 1442, that is, the second sub-liquid cooling channels 1452 completely surround the second sub-liquid cooling holes 1442, effectively increasing the liquid cooling heat conduction area between the second sub-liquid cooling channels 1452 and the electrode post 1212, further effectively shortening the heat conduction path between each electrode post 1212 and the first liquid cooling component 140, further improving the heat dissipation efficiency and heat dissipation uniformity of the single cell 121, improving the heat dissipation capacity of the single cell 121 in the battery pack 100, and ensuring the safety performance of the battery pack 100.

[0083] In some embodiments, refer to Figure 2 Multiple individual battery cells 121 are arranged along a second direction X to form a battery pack 120. Multiple battery packs 120 are arranged along a third direction Y. Multiple first liquid cooling components 140 are arranged at intervals along the third direction Y, and each first liquid cooling component 140 covers the first outer wall surface 1213 of a corresponding individual battery cell 121 in a battery pack 120.

[0084] This application sets up multiple first liquid cooling components 140 to simultaneously cool and dissipate heat from individual cells 121 in multiple battery packs 120, thereby simultaneously reducing the maximum temperature of each individual cell 121 in the battery pack 100 during high-rate charging and discharging, improving the overall heat dissipation performance of the battery pack 100, and further enhancing the safety performance of the battery pack 100.

[0085] In some embodiments, refer to Figures 3 to 11 The housing 110 includes a bottom plate 112, a side beam 113, and a crossbeam 114. The side beam 113 is arranged around the edge of the bottom plate 112, and the bottom plate 112 and the side beam 113 cooperate to form a receiving cavity 111. The crossbeam 114 extends along a third direction Y and is disposed in the receiving cavity 111. The crossbeam 114 is connected to the side beam 113.

[0086] The bottom plate 112, side beams 113 and crossbeams 114 are all welded and fixed to each other to ensure the overall sealing performance of the box 110.

[0087] Specifically, the crossbeam 114 is provided with an inlet channel 1141 and an outlet channel 1142. The inlet channel 1141 and the outlet channel 1142 are separated, that is, the inlet channel 1141 and the outlet channel 1142 are not connected to each other in the crossbeam 114.

[0088] The liquid inlet channel 1141 and the liquid outlet channel 1142 can be formed by directly setting the flow pipes on the crossbeam 114, or they can be formed by processing the crossbeam 114 using processing equipment.

[0089] Specifically, the first liquid cooling component 140 further includes an inlet pipe 146 and an outlet pipe 147 spaced apart. The inlet pipe 146 is connected to the side of the first liquid cooling component 140 near the side beam 113, and the inlet pipe 146 connects the first liquid cooling channel 145 and the inlet channel 1141. For example, in this application, the inlet pipe 146 is connected to the side of the first liquid cooling component 141 near the side beam 113, and the inlet pipe 146 connects the first sub-liquid cooling channel 1451 and the inlet channel 1141. The outlet pipe 147 is connected to the side of the first liquid cooling component 140 near the side beam 113, and the outlet pipe 147 connects the first liquid cooling channel 145 and the outlet channel 1142. For example, in this application, the liquid outlet pipe 147 is connected to the side of the second liquid cooling section 142 near the side beam 113, and the liquid outlet pipe 147 connects the second sub-liquid cooling channel 1452 with the liquid outlet channel 1142.

[0090] Understandably, external coolant is supplied to the inlet channel 1141. The coolant located in the inlet channel 1141 is supplied to the first sub-liquid cooling channel 1451, the third sub-liquid cooling channel 1453, and the second sub-liquid cooling channel 1452 in each first liquid cooling component 140 through the inlet pipe 146. The coolant located in the second sub-liquid cooling channel 1452 is supplied to the outlet channel 1142 through the outlet pipe 147 of each first liquid cooling component 140.

[0091] This application improves the cooling control efficiency of the first liquid cooling components 140 by setting up an inlet flow channel 1141 and an outlet flow channel 1142 to achieve synchronous control of multiple first liquid cooling components 140.

[0092] In some embodiments, refer to Figures 6 to 7 The battery pack 100 also includes a thermally conductive adhesive layer 160, which is disposed between the terminal post 1212 and the hole wall of the liquid cooling hole 144, and the thermally conductive adhesive layer 160 is connected to the outer wall of the terminal post 1212 and the hole wall of the liquid cooling hole 144. Specifically, the thermally conductive adhesive layer 160 is thermally connected to the outer wall of the terminal post 1212 and the hole wall of the liquid cooling hole 144 respectively.

[0093] The thermally conductive adhesive layer 160 can be made of any one of silicone thermally conductive adhesive, polyurethane thermally conductive adhesive, silicone potting compound thermally conductive adhesive, or acrylic thermally conductive adhesive, but is not limited to this.

[0094] This application optimizes the thermal conductivity between the terminal 1212 and the first liquid cooling component 140 by providing a thermally conductive adhesive layer 160 between the terminal 1212 and the wall of the liquid cooling hole 144. This improves the heat transfer efficiency between the first liquid cooling component 140 and the terminal 1212, ensuring that the first liquid cooling component 140 efficiently cools the terminal 1212 of the single cell 121. This further enhances the heat dissipation efficiency of the single cell 121 and improves the heat dissipation capacity of the single cell 121 in the battery pack 100, thus ensuring the safety performance of the battery pack 100.

[0095] In some embodiments, refer to Figures 4 to 7 The battery pack 100 also includes a plurality of electrical connectors 170, which are all disposed on the side of the first liquid cooling component 140 away from the first outer wall surface 1213, and each electrical connector 170 is electrically connected to the terminal post 1212 of a corresponding single cell 121, and the electrical connector 170 is thermally connected to the first liquid cooling component 140.

[0096] The electrical connector 170 may be made of a conductive metal or other material, but is not limited to this. For example, the electrical connector 170 may be made of copper or aluminum, but is not limited to this.

[0097] This application forms a heat dissipation structure by thermally connecting the electrical connector 170 to the first liquid cooling component 140, thereby utilizing the first liquid cooling component 140 to liquid cool the electrical connector 170. This reduces the cross-sectional area of ​​the electrical connector 170, i.e., reduces its size, while ensuring its normal operation, thus lowering the cost and weight of the battery pack 100. Simultaneously, it further improves the overall heat dissipation performance of the battery pack 100 and enhances its safety performance.

[0098] In some embodiments, the second liquid cooling component 150 has a second liquid cooling channel 151 for circulating coolant, which may be a mixture of water and ethanol.

[0099] Reference Figure 3 The battery pack 100 also includes a main liquid inlet pipe 181 and a main liquid outlet pipe 182. The main liquid inlet pipe 181 is connected to the liquid inlet end of the liquid inlet channel 1141 and the liquid inlet end of the second liquid cooling channel 151, respectively. The main liquid outlet pipe 182 is connected to the liquid outlet end of the liquid outlet channel 1142 and the liquid outlet end of the second liquid cooling channel 151, respectively.

[0100] The main inlet pipe 181 and the main outlet pipe 182 are both connected to an external liquid storage device for the battery pack 100, which is used to provide coolant.

[0101] Specifically, the coolant in the liquid storage device is delivered to the main inlet pipe 181. The coolant from the main inlet pipe 181 is delivered to the inlet flow channel 1141 and the second liquid cooling flow channel 151 respectively. The coolant in the inlet flow channel 1141 is delivered to the first sub-liquid cooling flow channel 1451, the third sub-liquid cooling flow channel 1453 and the second sub-liquid cooling flow channel 1452 in each of the first liquid cooling components 140 through the inlet pipe section 146. The coolant in the second sub-liquid cooling flow channel 1452 is delivered to the outlet flow channel 1142 through the outlet pipe section 147 of each of the first liquid cooling components 140. The coolant in the outlet flow channel 1142 and the coolant in the second liquid cooling flow channel 151 are discharged to the main outlet pipe 182. The coolant from the main outlet pipe 182 is discharged to the liquid storage device to form a liquid cooling cycle.

[0102] This application improves the cooling control efficiency of the first liquid cooling component 140 and the second liquid cooling component 150 by setting a main liquid inlet pipe 181 and a main liquid outlet pipe 182 to achieve synchronous control of multiple first liquid cooling components 140 and second liquid cooling components 150.

[0103] On the other hand, in the embodiments of this application, this application also provides an electrical device, including: a battery pack 100 as in any of the above embodiments, wherein the battery pack 100 serves as a power supply for the electrical device.

[0104] Among them, electrical devices may include, 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.

[0105] The above steps are provided only to help understand the method, structure, and core ideas of this application. Those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

Claims

1. A battery pack having a first orientation, characterized in that, include: The box body is equipped with a receiving cavity; A lid is disposed on one side of the box body in the first direction; Multiple individual batteries are disposed within the receiving cavity, and each individual battery includes: a battery body and an electrode post. The battery body has a first outer wall surface and a second outer wall surface disposed opposite to each other in the first direction. The first outer wall surface is disposed close to the cover relative to the second outer wall surface, and the electrode post is disposed on the first outer wall surface. A first liquid cooling component covers the first outer wall surface. The first liquid cooling component has multiple liquid cooling holes, and each of the electrode posts passes through a corresponding liquid cooling hole. The first liquid cooling component is thermally connected to both the first outer wall surface and the electrode post. The second liquid cooling component covers the second outer wall surface and is thermally connected to the second outer wall surface of the single cell.

2. The battery pack as described in claim 1, characterized in that, The first liquid cooling component has a first liquid cooling channel, and a portion of the first liquid cooling channel surrounds the outer periphery of each of the liquid cooling holes.

3. The battery pack as described in claim 2, characterized in that, The battery pack also has a second direction intersecting the first direction; Multiple individual cells are arranged along the second direction to form a battery pack; The first liquid cooling component includes: a first liquid cooling part, a second liquid cooling part, and a connecting part. The first liquid cooling part and the second liquid cooling part both extend along the second direction, and the connecting part is connected to one side of the first liquid cooling part and the second liquid cooling part in the second direction. The liquid cooling hole includes a first sub-liquid cooling hole and a second sub-liquid cooling hole. The first sub-liquid cooling hole is opened in the first liquid cooling section, and the second sub-liquid cooling hole is opened in the second liquid cooling section. Part of the electrode post passes through the first sub-liquid cooling hole, and another part of the electrode post passes through the second sub-liquid cooling hole.

4. The battery pack as described in claim 3, characterized in that, The first liquid cooling section has a first sub-liquid cooling channel, the second liquid cooling section has a second sub-liquid cooling channel, and the connecting section has a third sub-liquid cooling channel. The first sub-liquid cooling channel, the second sub-liquid cooling channel, and the third sub-liquid cooling channel are connected to form the first liquid cooling channel. A portion of the first sub-liquid cooling channels are disposed around the outer periphery of each of the first sub-liquid cooling holes; and / or, A portion of the second sub-liquid cooling channels are arranged around the outer periphery of each second sub-liquid cooling hole.

5. The battery pack as described in claim 2, characterized in that, The battery pack also has a second direction and a third direction that intersect the first direction in pairs; Multiple individual cells are arranged along the second direction to form a battery pack, and the number of battery packs is set to be multiple, with the multiple battery packs arranged along the third direction; The number of the first liquid cooling components is set to multiple, and the multiple first liquid cooling components are arranged at intervals along the third direction. Each first liquid cooling component covers the first outer wall surface of the corresponding single cell in the battery pack.

6. The battery pack as described in claim 5, characterized in that, The enclosure includes a bottom plate, side beams, and a crossbeam. The side beams are arranged around the edge of the bottom plate, and the bottom plate and the side beams cooperate to enclose the receiving cavity. The crossbeams extend along the third direction and are disposed within the receiving cavity. The crossbeams are connected to the side beams. The crossbeam is provided with an inlet channel and an outlet channel, and the inlet channel and the outlet channel are separated. The first liquid cooling component further includes: an inlet pipe and an outlet pipe spaced apart, the inlet pipe being connected to the side of the first liquid cooling component near the side beam, and the inlet pipe connecting the first liquid cooling channel to the inlet channel, and the outlet pipe being connected to the side of the first liquid cooling component near the side beam, and the outlet pipe connecting the first liquid cooling channel to the outlet channel.

7. The battery pack as claimed in claim 1, characterized in that, The battery pack further includes a thermally conductive adhesive layer, which is disposed between the electrode post and the wall of the liquid cooling hole, and is connected to the outer wall of the electrode post and the wall of the liquid cooling hole.

8. The battery pack as claimed in claim 1, characterized in that, Also includes: Multiple electrical connectors are disposed on the side of the first liquid cooling component away from the first outer wall surface, and each electrical connector is electrically connected to the terminal of a corresponding single cell, and the electrical connectors are thermally connected to the first liquid cooling component.

9. The battery pack as described in claim 6, characterized in that, The second liquid cooling component has a second liquid cooling flow channel; The battery pack further includes a main liquid inlet pipe and a main liquid outlet pipe. The main liquid inlet pipe is connected to the liquid inlet end of the liquid inlet channel and the liquid inlet end of the second liquid cooling channel, respectively. The main liquid outlet pipe is connected to the liquid outlet end of the liquid outlet channel and the liquid outlet end of the second liquid cooling channel, respectively.

10. An electrical device, characterized in that, include: The battery pack as described in any one of claims 1 to 9, wherein the battery pack serves as the power supply for the electrical device.

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