Battery monomer, battery device and electric device

Abstract

The utility model discloses a battery monomer, a battery device and a power utilization device. The battery monomer comprises a battery cell, an electrode and a phase change material layer, the electrode is arranged on the battery cell and is electrically connected with the battery cell; and a phase change material layer is arranged on at least partial region of the battery cell and / or at least partial region of the electrode. Through the arrangement, heat generated by the battery cell and / or the electrode can be absorbed by the phase change material layer, so that the probability of high temperature of the battery monomer is reduced, and the service life of the battery monomer is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery device and a power consumption device. BACKGROUND

[0002] In a fast charging scenario, the internal structural parts (such as electrodes) of a battery will quickly heat up and generate a large amount of heat. The existing cooling system of the battery is not suitable for the case where the battery heats up too quickly and too high, and cannot quickly cool the high-temperature structural parts of the battery in a short time, resulting in high temperature of the battery during charging, which shortens the service life of the battery. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a battery monomer, a battery device and a power consumption device, aiming to solve the problem that the battery monomer heats up too quickly and too high during fast charging, which affects the service life of the battery monomer.

[0004] To solve the above problem, the present application provides a battery monomer, which comprises: an electric core, an electrode and a phase change material layer; the electrode is arranged on the electric core and electrically connected with the electric core; the phase change material layer is arranged on at least part of the electric core and / or at least part of the electrode.

[0005] In the above scheme, by arranging the phase change material layer on at least part of the electric core and / or at least part of the electrode, the phase change material layer can absorb the heat generated by the electric core and / or the electrode during charging of the battery monomer, so as to quickly cool the electric core and / or the electrode, thereby reducing the probability of high temperature of the battery monomer and improving the service life of the battery monomer.

[0006] In an embodiment, the electric core has a connecting surface, and the electrode is located on the connecting surface; the phase change material layer is arranged on the connecting surface and located between the electrode and the connecting surface.

[0007] In this way, the phase change material layer on the connecting surface can simultaneously absorb the heat generated by the electric core and the electrode, so as to improve the cooling efficiency of the electric core and the electrode.

[0008] In an embodiment, the electrode comprises: a tab, an adapter and a pole; the tab is connected with the electric core and located on the connecting surface; the adapter is located on the connecting surface and connected with the side of the tab away from the connecting surface; the pole is connected with the side of the adapter away from the connecting surface, and the orthographic projections of the tab and the pole on the connecting surface are spaced apart.

[0009] In this way, the tab, the adapter and the pole can be used to realize electrical conduction between the electric core and an external circuit.

[0010] In an embodiment, the tab has a first connecting portion opposite to and spaced apart from the connecting surface, the adapter is connected to a side of the first connecting portion away from the connecting surface, and the first connecting portion and the connecting surface are provided with the phase change material layer; and / or, the adapter has a second connecting portion opposite to and spaced apart from the connecting surface, the pole is connected to a side of the second connecting portion away from the connecting surface, and the second connecting portion and the connecting surface are provided with the phase change material layer.

[0011] In this way, the two phase change material layers can be used to dissipate heat from the tab and the adapter respectively.

[0012] In an embodiment, the tab has a first connecting portion opposite to and spaced apart from the connecting surface, the adapter is connected to a side of the first connecting portion away from the connecting surface; the adapter has a second connecting portion opposite to and spaced apart from the connecting surface, the pole is connected to a side of the second connecting portion away from the connecting surface; and the first connecting portion and the second connecting portion are located within the projection range of the phase change material layer on the connecting surface.

[0013] In this way, the tab and the adapter can share the same phase change material layer for heat dissipation, thereby reducing the number of phase change material layers and simplifying the assembly process of the battery cell.

[0014] In an embodiment, the battery cell further comprises a carrier; the battery cell has a connecting surface, and the electrode is located on the connecting surface; the carrier is arranged on the connecting surface and located between the electrode and the connecting surface; and the phase change material layer is arranged on the carrier and located between the carrier and the electrode.

[0015] In this way, the carrier carrying the phase change material layer can be assembled with the battery cell to reduce the assembly difficulty.

[0016] In an embodiment, the carrier has a limiting structure relative to a part of the phase change material layer, and the limiting structure is configured to limit the position of the phase change material layer in a direction parallel to the connecting surface.

[0017] In this way, the limiting structure can be used to limit the position of the phase change material layer to reduce the probability of position deviation of the phase change material layer.

[0018] In an embodiment, the limiting structure has a limiting groove on a side facing the electrode, and the phase change material is arranged in the limiting groove.

[0019] In this way, the limiting groove can be used to accommodate the phase change material layer to improve the limiting reliability of the phase change material layer.

[0020] In one embodiment, the carrier is elastic and configured to generate elastic force on the phase change material layer to make the phase change material layer abut against the electrode in a direction perpendicular to the connecting surface.

[0021] Thus, the carrier can be used to provide elastic force to make the phase change material layer abut against the electrode, so as to improve the heat conduction efficiency between the electrode and the phase change material layer.

[0022] In one embodiment, the electrode comprises a tab, an adapter and a post; the tab is connected with the battery cell and located on the connecting surface; the adapter is located on the connecting surface and connected with the tab on a side away from the connecting surface; the post is connected with the adapter on a side away from the connecting surface, and the tab and the post are spaced apart in orthographic projection on the connecting surface.

[0023] Thus, the adapter can be increased in area by using the tab and the post in staggered arrangement, so as to arrange more phase change material layers for cooling.

[0024] In one embodiment, the tab has a first connecting portion oppositely and spacedly arranged with the connecting surface, the adapter is connected with the first connecting portion on a side away from the connecting surface; the carrier is arranged between the first connecting portion and the connecting surface, and the phase change material layer is arranged between the carrier and the first connecting portion; and / or, the adapter has a second connecting portion oppositely and spacedly arranged with the connecting surface, the post is connected with the second connecting portion on a side away from the connecting surface; the carrier is arranged between the second connecting portion and the connecting surface, and the phase change material layer is arranged between the carrier and the second connecting portion.

[0025] Thus, two phase change material layers can be respectively carried by two carriers, so as to improve the layout flexibility of the phase change material layers.

[0026] In one embodiment, the tab has a first connecting portion oppositely and spacedly arranged with the connecting surface, the adapter is connected with the first connecting portion on a side away from the connecting surface; the adapter has a second connecting portion oppositely and spacedly arranged with the connecting surface, the post is connected with the second connecting portion on a side away from the connecting surface; the carrier has a first carrying portion between the first connecting portion and the connecting surface, and the phase change material layer is arranged between the first carrying portion and the first connecting portion; the carrier further has a second carrying portion between the second connecting portion and the connecting surface, and the phase change material layer is also arranged between the second carrying portion and the second connecting portion.

[0027] Thus, two phase change material layers can be carried by one carrier, so as to reduce the number of carriers and simplify the assembly process of the battery cell.

[0028] In one embodiment, the lug has a first connecting portion opposite and spaced from the connecting surface, the adapter is connected to a side of the first connecting portion away from the connecting surface; the adapter has a second connecting portion opposite and spaced from the connecting surface, the post is connected to a side of the second connecting portion away from the connecting surface; the carrier has a first bearing portion between the first connecting portion and the connecting surface, and the carrier also has a second bearing portion between the second connecting portion and the connecting surface; the phase change material layer is on a side of the carrier away from the connecting surface, and covers the first bearing portion and the second bearing portion.

[0029] Thus, one carrier can be used to carry one phase change material layer to dissipate heat from the lug and the adapter, so as to reduce the number of carriers and phase change material layers, thereby simplifying the assembly process of the battery cell.

[0030] In one embodiment, a side of the adapter away from the connecting surface has a first surface covered by the post, and a second surface not covered by the post; wherein the second surface is also provided with the phase change material layer.

[0031] Thus, the phase change material layer on the second surface and the connecting surface can be used to dissipate heat from the adapter at the same time, so as to improve the heat dissipation efficiency of the adapter.

[0032] In one embodiment, the phase change material layer on the second surface comprises a first heat absorption zone, a second heat absorption zone, and a third heat absorption zone; the first heat absorption zone is arranged close to the post, the second heat absorption zone is arranged away from the post and connected to a side of the lug away from the connecting surface; the third heat absorption zone is between the first heat absorption zone and the second heat absorption zone, and the volume of the third heat absorption zone is greater than the volume of the first heat absorption zone and the second heat absorption zone.

[0033] Thus, the phase change material layer with different volumes on the second surface can be used to dissipate heat from the high-temperature area of the adapter.

[0034] In one embodiment, the lug has an outer surface with a part of the surface connected to the adapter, and the phase change material layer is arranged on a part of the surface of the outer surface not covered by the adapter.

[0035] Thus, the phase change material layer on the outer surface and the connecting surface can be used to dissipate heat from the lug at the same time, so as to improve the heat dissipation efficiency of the lug.

[0036] In one embodiment, the battery cell further comprises a housing, the housing has a containing space, the battery core is arranged in the containing space, the tab, the adapter and the post are located between the connecting surface and the housing, and an end of the post away from the adapter is arranged in the housing and exposed outside the containing space.

[0037] Thus, the battery core and the electrode can be protected by the housing.

[0038] In one embodiment, the phase change material layer comprises a heat storage area and a cooling area, the heat storage area is connected with the cooling area, the heat storage area is configured to absorb and release the heat emitted by the electrode, and the cooling area is configured to conduct the heat absorbed and released by the heat storage area.

[0039] Thus, the cooling area can be used to quickly import or export heat, so as to improve the heat absorption efficiency and the heat release efficiency of the phase change material layer.

[0040] Another aspect of the present application provides a battery device, which comprises at least one battery cell as described above.

[0041] Thus, the battery device can be improved in service life and reliability by using the battery cell with a longer service life.

[0042] The present application also provides a power consuming device, which comprises the battery device as described above and is configured to provide electric energy.

[0043] Thus, the power consuming device can be provided with electric energy by using the battery device with higher reliability, so as to reduce the probability of power failure of the power consuming device. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0045] Figure 1 is a structural schematic diagram of a power consuming device provided by the present application;

[0046] Figure 2 is Figure 1 a structural schematic diagram of a battery device in the power consuming device;

[0047] Figure 3 is Figure 2 a structural schematic diagram of a battery cell in the power consuming device;

[0048] Figure 4 is Figure 3A decomposition structure schematic view of the middle battery cell;

[0049] Figure 5 is Figure 3 A partial cross-sectional structure schematic view of the middle battery cell along V-V;

[0050] Figure 6 is Figure 3 A partial cross-sectional structure schematic view of the middle battery cell along VI-VI;

[0051] Figure 7 is Figure 3 Another partial cross-sectional structure schematic view of the middle battery cell along V-V;

[0052] Figure 8 is Figure 3 Another partial cross-sectional structure schematic view of the middle battery cell along VI-VI;

[0053] Figure 9 is Figure 3 Still another partial cross-sectional structure schematic view of the middle battery cell along V-V;

[0054] Figure 10 is a cross-sectional structure schematic view of a phase change material layer provided by an embodiment of the present application.

[0055] In the drawings, reference numerals:

[0056] An electrical device 1; a battery device 10; a controller 20; a motor 30; a box body 100; a first part 110; a second part 120; a battery cell 200; an electric core 210; a connecting surface 211; an electrode 220; a tab 221; a first connecting part 2211; an extension part 2212; an outer surface 221a; an inner surface 221b; an adapter 222; a second connecting part 2221; a first surface 222a; a second surface 222b; a pole 223; a phase change material layer 230; a first heat absorption area 231; a second heat absorption area 232; a third heat absorption area 233; a heat storage area 2301; a cooling area 2302; an encapsulation area 2303; a carrier 240; a limiting structure 241; a limiting groove 2411; a first bearing part 242; a second bearing part 243; an outer shell 250; a containing space 2501; a top cover 251; a bottom shell 252. DETAILED DESCRIPTION

[0057] The present application will be further described below in conjunction with the drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustrating the present application, but not for limiting the scope of the present application. Similarly, the following embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application, and all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the present application.

[0058] Reference to an "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that the embodiments described herein are merely examples from a multitude of possible embodiments.

[0059] Please refer to Figures 1-2 , Figure 1 is a structural schematic diagram of the power-using device 1 provided by the application, Figure 2 is Figure 1 a structural schematic diagram of the battery device 10 in the application.

[0060] The embodiment of the application provides a power-using device 1, and the power-using device 1 can include but is not limited to a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship or a spacecraft, and the like. In the following, only the power-using device 1 is taken as an electric vehicle for example to be described. As shown in Figure 1 , the power-using device 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle. The power-using device 1 is internally provided with a battery device 10, the battery device 10 can be arranged at the bottom, the head or the tail of the power-using device 1, and the battery device 10 can be used as an operating power supply of the power-using device 1 to supply power for the power-using device 1. For example, the power-using device 1 can further include a controller 20 and a motor 30, the controller 20 is used to control the battery device 10 to supply power for the motor 30, so as to meet the working power demand of the power-using device 1 during starting, navigation and driving. Of course, the battery device 10 can not only be used as an operating power supply of the power-using device 1, but also be used as a driving power supply of the power-using device 1 to replace or partially replace fuel or natural gas to provide driving power for the power-using device 1.

[0061] The battery device 10 can be used as an operating power supply or a driving power supply to supply power for the power-using device 1. As Figure 2As shown, the battery device 10 can include a box 100 and battery cells 200. The box 100 can accommodate at least one battery cell 200, and the at least one battery cell 200 can be used to supply power to the electric device 1. Meanwhile, when the number of battery cells 200 is multiple, the multiple battery cells 200 can be electrically connected in at least one of series, parallel, and mixed connection through a busbar component, and the multiple battery cells 200 can also be bundled together to be accommodated as a whole in the box 100. Of course, the fixing manner of the multiple battery cells 200 can not be limited to being bundled, and the multiple battery cells 200 can also not be limited to being placed in the box 100 as a whole after being bundled into one. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0062] The box 100 is used to provide an accommodation space for the battery cells 200, and the box 100 can adopt various structures. For example, the box 100 can include a first part 110 and a second part 120, the first part 110 and the second part 120 are mutually covered, and the first part 110 and the second part 120 jointly enclose to form an accommodation space. Alternatively, the second part 120 can be a hollow structure with one end open, and the first part 110 can be a plate structure, the first part 110 covers the open side of the second part 120, so that the first part 110 and the second part 120 jointly enclose to form an accommodation space. Alternatively, the first part 110 and the second part 120 can also be hollow structures with one side open, and the open side of the first part 110 covers the open side of the second part 120, so that the first part 110 and the second part 120 jointly enclose to form an accommodation space.

[0063] In some embodiments, the box 100 can also be part of the chassis of the vehicle. That is, part of the box 100 can become at least part of the floor of the vehicle, or part of the box 100 can become at least part of the cross beam and the longitudinal beam of the vehicle. In addition, in some embodiments, the battery device 10 can also only include at least one battery cell 200, and the electric device 1 can have an accommodation shell similar to the box 100 to accommodate at least one battery cell 200, and the design of the box 100 can be omitted. The terms "first", "second", "third" in the present application are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features.

[0064] All directional indications, such as upper, lower, left, right, front, back, etc., are intended to facilitate the description of the relative position and movement of various components with respect to each other, and are in no way limiting. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a list of steps or units is not limited to the listed steps or units, but can optionally further include other steps or units not listed, or can optionally further include other steps or units inherent to such processes, methods, systems, products or devices.

[0065] With the continuous maturity of fast charging technology, fast charging has become an important function indispensable to the battery device 10. However, high-power fast charging also increases the pressure on the battery device 10. In particular, the fast charging technology of some battery devices 10 can generate a large current to charge the battery monomer 200 in a short time, and the internal structural components (such as electrodes) of the battery monomer 200 can be overheated due to the large current in a short time. At the same time, since the existing cooling system of the battery device 10 can only perform slow and continuous heat dissipation on the battery monomer 200, it cannot achieve rapid cooling of the internal structure of the battery monomer 200 in a short time. Therefore, the battery monomer 200 can be overheated under the influence of the large current of fast charging, which undoubtedly affects the reliability of the battery monomer 200 and shortens the service life of the battery monomer 200.

[0066] To solve the above technical problems, the embodiment of the present application provides a battery monomer 200, by setting a heat absorption component made of a phase change material on the internal structure of the battery monomer 200, so that the battery monomer 200 can utilize the heat absorption and energy storage characteristics of the phase change material to absorb the heat generated by the battery monomer 200 in a short time, so as to reduce the probability of overheating of the battery monomer 200 in the fast charging scenario, thereby improving the service life of the battery monomer 200. The specific structure of the battery monomer 200 provided by the embodiment of the present application is further described below in conjunction with the drawings.

[0067] Please refer to Figures 3-4 , Figure 3 is Figure 2 the structural schematic diagram of the battery monomer 200 in Figure 4 is Figure 3 the exploded structural schematic diagram of the battery monomer 200 in.

[0068] The battery cell 200 can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging. Meanwhile, the battery cell 200 can include, but is not limited to, 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-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, and the like. As shown in FIG. 2A, the battery cell 200 can include an electrode 220, an electrolyte 230, and an electrode 240. The electrode 220 is disposed on the electrode 240 and electrically connected to the electrode 240. The electrode 220 can be disposed on at least a portion of the electrode 240. Figures 3-4 As shown in FIG. 2A, the battery cell 200 can include an electrode 220, an electrolyte 230, and an electrode 240. The electrode 220 is disposed on the electrode 240 and electrically connected to the electrode 240. The electrode 220 can be disposed on at least a portion of the electrode 240.

[0069] The electrode 220 can be disposed on at least a portion of the electrode 240. For example, since the electrode 220 can generate a large amount of heat when conducting a large current (fast charging), the electrode 220 can be disposed on at least a portion of the electrode 240. The electrode 220 can be disposed on at least a portion of the electrode 240 to absorb heat generated by the electrode 220 and to locally isolate the electrode 220 from the electrode 240 to reduce the influence of the heat generated by the electrode 220 on the electrode 240. Of course, in addition to the portion of the electrode 240 near the electrode 220, the electrode 240 can also be disposed on other portions of the electrode 240 that require heat dissipation.

[0070] The electrode 220 can be disposed on at least a portion of the electrode 240. For example, since the electrode 220 can generate a large amount of heat when conducting a large current (fast charging), the electrode 220 can be disposed on at least a portion of the electrode 240. The electrode 220 can be disposed on at least a portion of the electrode 240 to absorb heat generated by the electrode 220 and to locally isolate the electrode 220 from the electrode 240 to reduce the influence of the heat generated by the electrode 220 on the electrode 240. Of course, in addition to the portion of the electrode 240 near the electrode 220, the electrode 240 can also be disposed on other portions of the electrode 240 that require heat dissipation.

[0071] The phase change material layer 230 can be disposed on at least a portion of the battery cell 210 and / or electrode 220, and can absorb the heat generated by the battery cell 210 and / or electrode 220. The phase change material layer 230 can include any one of solid-solid phase change materials, solid-liquid phase change materials, and composite phase change materials. Composite phase change materials refer to composite phase change materials in which one or more functional additives (such as coolants, binders, or curing agents) are added to solid-solid or solid-liquid phase change materials. For example, the phase change material layer 230 can be a heat-absorbing block made of solid-solid phase change materials and their composite phase change materials, and can be fixed to the battery cell 210 and / or electrode 220 by adhesive bonding. Alternatively, the phase change material layer 230 can be a heat-absorbing coating sprayed or applied onto the battery cell 210 and / or electrode 220 by solid-solid phase change materials and their composite phase change materials. Alternatively, the phase change material layer 230 may be a heat-absorbing film made of an encapsulation film and a solid-liquid phase change material or a composite phase change material filled in the encapsulation film, and may be fixed to the cell 210 and / or the electrode 220 by adhesive bonding.

[0072] With the above configuration, the battery cell 200 can absorb the heat generated by the cell 210 and / or the electrode 220 using the phase change material layer 230, so as to achieve rapid cooling of the battery cell 200 during fast charging, thereby reducing the probability of the battery cell 200 reaching high temperature and improving the service life of the battery cell 200.

[0073] Please combine Figure 4 See Figures 5-6 , Figure 5 yes Figure 3 A schematic diagram of a partial cross-sectional structure of a 200-cell battery along line V-V. Figure 6 yes Figure 3 A schematic diagram of a partial cross-sectional structure of the 200-cell battery along line VI-VI.

[0074] The battery cell 210 has a connection surface 211, and the electrode 220 is located on the connection surface 211. A phase change material layer 230 is disposed on the connection surface 211 and located between the electrode 220 and the connection surface 211. Figure 4 and Figure 5 As shown, electrode 220 can be electrically connected to cell 210 from connection surface 211, and a portion of electrode 220 can be spaced apart from connection surface 211. Phase change material layer 230 can be located between the portion of electrode 220 spaced apart from connection surface 211 and connection surface 211, and the opposite sides of phase change material layer 230 can contact connection surface 211 and electrode 220 respectively, so as to improve the thermal conductivity between phase change material layer 230, cell 210 and electrode 220.

[0075] By providing a phase change material layer 230 on the connection surface 211 between the battery cell 210 and the electrode 220, and by positioning the phase change material layer 230 between the electrode 220 and the connection surface 211, the phase change material layer 230 can simultaneously absorb heat from both the battery cell 210 and the electrode 220. Simultaneously, the phase change material layer 230 also provides a degree of insulation between the battery cell 210 and the electrode 220. In other words, the phase change material layer 230 can act as a heat-absorbing medium, delaying the time it takes for heat from the electrode 220 to be transferred to the battery cell 210, thereby reducing the probability of the battery cell 210 being affected by the high temperature of the electrode 220.

[0076] In some embodiments, to reduce the probability of interference between the phase change material layer 230 and the electrode 220 when the phase change material layer 230 is installed between the connecting surface 211 and the electrode 220, a certain gap (a reserved assembly gap) may also exist between the phase change material layer 230 and the electrode 220. The heat generated by the electrode 220 can be conducted to the phase change material layer 230 through the air in the gap. That is, the phase change material layer 230 on the connecting surface 211 may not be in contact with the electrode 220; it is sufficient that the phase change material layer 230 can absorb the heat generated by the electrode 220.

[0077] In some embodiments, a thermally conductive layer may also be provided between the phase change material layer 230 and the electrode 220 to fill any gaps that may exist between the phase change material layer 230 and the electrode 220, thereby improving the thermal conductivity between the phase change material layer 230 and the electrode 220. Similarly, a thermally conductive layer may also be provided between the phase change material layer 230 and the connection surface 211 to improve the thermal conductivity between the phase change material layer 230 and the battery cell 210. In this embodiment, the thermally conductive layer may be made of an insulating and thermally conductive material, such as thermally conductive grease or thermally conductive adhesive, to improve the heat exchange efficiency between the phase change material layer 230 and the battery cell 210 and the electrode 220.

[0078] Electrode 220 can electrically connect the external circuit and the battery cell 210. For example... Figures 4-5 As shown, electrode 220 may include: tab 221, adapter 222, and terminal 223. Tab 221 is electrically connected to battery cell 210 and is located on connection surface 211. Adapter 222 is also located on connection surface 211 and can be connected to the side of tab 221 opposite to connection surface 211. Terminal 223 can be connected to the side of adapter 222 opposite to connection surface 211, and the orthographic projections of tab 221 and terminal 223 on connection surface 211 can be spaced apart.

[0079] The tab 221 can be connected with the conductive structure inside the battery cell 210, and can be led out from the connecting surface 211 along the first direction X (perpendicular to the connecting surface 211), and the tab 221 can also be bent (e.g., bent by 90°) towards the direction of the connecting surface 211 after being led out from the connecting surface 211, so that the bent part of the tab 221 can be arranged opposite to and spaced from the connecting surface 211, to increase the area of the side of the tab 221 away from the connecting surface 211, thereby facilitating the electrical connection between the tab 221 and the adapter 222. In this embodiment, a phase change material layer 230 can be arranged between the tab 221 and the connecting surface 211, to absorb the heat generated by the tab 221 by using the phase change material layer 230.

[0080] The adapter 222 can be used to connect the tab 221 and the pole 223, to realize the electrical conduction between the tab 221 and the pole 223. The adapter 222 can be an electrically conductive sheet, and can be arranged opposite to and spaced from the connecting surface 211, and the thickness direction of the adapter 222 can also be parallel to the first direction X, so that the opposite two sides of the adapter 222 towards and away from the connecting surface 211 have sufficient area to be electrically connected (e.g., welded) with the tab 221 and the pole 223 respectively, to improve the electrical connection reliability of the tab 221 and the pole 223. In this embodiment, a phase change material layer 230 can also be arranged between the adapter 222 and the connecting surface 211, to absorb the heat generated by the adapter 222 by using the phase change material layer 230.

[0081] The pole 223 can be connected with the side of the adapter 222 away from the connecting surface 211, and the end of the pole 223 away from the adapter 222 can also be exposed outside the battery monomer 200, and can be used to be electrically connected with the external circuit, to realize the electrical conduction between the battery cell 210 and the external circuit. At the same time, the orthogonal projection of the pole 223 on the connecting surface 211 can be located outside the coverage range of the orthogonal projection of the tab 221 on the connecting surface 211. For example, the orthogonal projections of the pole 223 and the tab 221 on the connecting surface 211 can be arranged spaced apart in the second direction Y (perpendicular to the first direction X), so that the pole 223 and the tab 221 can be arranged staggered in the first direction X. In this embodiment, since the pole 223 is connected with the side of the adapter 222 away from the connecting surface 211, the phase change material layer 230 between the adapter 222 and the connecting surface 211 can also be understood as the phase change material layer 230 between the pole 223 and the connecting surface 211, and can indirectly absorb the heat generated by the pole 223 through the adapter 222.

[0082] The adapter 222 is electrically connected with the tab 221 and the pole 223, so that the battery cell 210 can be electrically connected with the external circuit through the tab 221, the adapter 222 and the pole 223. Meanwhile, the tab 221 and the pole 223 are arranged in the first direction X in a staggered manner, so that the adapter 222 has a certain interval distance with the two areas connected with the tab 221 and the pole 223, so as to expand the volume of the adapter 222, thereby affecting the electrical connection reliability of the adapter 222 with the tab 221 and the pole 223.

[0083] The phase change material layer 230 is arranged between the tab 221 and the connecting surface 211, and between the adapter 222 and the connecting surface 211. Hereinafter, the phase change material layer 230 arranged between the tab 221 and the connecting surface 211 and between the adapter 222 and the connecting surface 211 is exemplified. Figure 5 and Figure 6 As shown in FIGS. 1 and 2, the tab 221 has a first connecting portion 2211 arranged opposite to and spaced apart from the connecting surface 211, and the adapter 222 can be connected with the first connecting portion 2211 away from the connecting surface 211, and the phase change material layer 230 is arranged between the first connecting portion 2211 and the connecting surface 211. The adapter 222 has a second connecting portion 2221 arranged opposite to and spaced apart from the connecting surface 211, and the pole 223 can be connected with the second connecting portion 2221 away from the connecting surface 211, and the phase change material layer 230 is arranged between the second connecting portion 2221 and the connecting surface 211.

[0084] The first connecting portion 2211 can be a part of the tab 221 arranged in a bent manner towards the connecting surface 211 after being led out from the connecting surface 211, so that the first connecting portion 2211 can be arranged opposite to and spaced apart from the connecting surface 211 in the first direction X to form an interval space for accommodating the phase change material layer 230. Meanwhile, the first connecting portion 2211 can also be in contact with the side of the phase change material layer 230 away from the connecting surface 211, so that the tab 221 can transfer heat to the phase change material layer 230 through the first connecting portion 2211 to realize the cooling of the tab 221 by the phase change material layer 230. In addition, the tab 221 can also include an extension portion 2212 connected with the battery cell 210 and the first connecting portion 2211 respectively, and the extension portion 2212 can also be in contact with the phase change material layer 230 on the connecting surface 211 to expand the contact area between the phase change material layer 230 and the tab 221, thereby improving the heat conduction efficiency between the phase change material layer 230 and the tab 221.

[0085] The second connecting portion 2221 can be a partial area of the adapter 222 between the pole 223 and the connecting surface 211, and a normal projection of the second connecting portion 2221 on the connecting surface 211 can also be located outside the coverage range of the normal projection of the tab 221 on the connecting surface 211. The normal projection of the pole 223 on the connecting surface 211 can also be located within the coverage range of the normal projection of the second connecting portion 2221 on the connecting surface 211, so that the pole 223 can be connected with the side of the second connecting portion 2221 away from the connecting surface 211, and can be arranged in a staggered manner with the tab 221 in the first direction X. At the same time, the second connecting portion 2221 can also be arranged in a relative and spaced manner with the connecting surface 211 in the first direction X to form a spacing space to accommodate the phase change material layer 230. In addition, the second connecting portion 2221 can also be in contact with the side of the phase change material layer 230 away from the connecting surface 211, so that the adapter 222 and the pole 223 can transfer heat to the phase change material layer 230 through the second connecting portion 2221 to achieve the cooling of the phase change material layer 230 to the adapter 222 and the pole 223.

[0086] In some embodiments, the first connecting portion 2211 and the phase change material layer 230 can also have the aforementioned gap therebetween, and are not limited to being in contact with the side of the phase change material layer 230 away from the connecting surface 211. Similarly, the extension portion 2212 and the phase change material layer 230, and the second connecting portion 2221 and the phase change material layer 230 can also have the aforementioned gap therebetween, and are not limited to being in contact with the phase change material layer 230. Of course, the first connecting portion 2211 and the phase change material layer 230, the extension portion 2212 and the phase change material layer 230, and the second connecting portion 2221 and the phase change material layer 230 can also be filled with the aforementioned heat-conducting layer therebetween.

[0087] By arranging the phase change material layer 230 between the first connecting portion 2211 and the connecting surface 211, and arranging the phase change material layer 230 between the second connecting portion 2221 and the connecting surface 211, not only can the two phase change material layers 230 respectively absorb the high heat generated by the tab 221, the adapter 222 and the pole 223 due to the large current, but also can the two phase change material layers 230 absorb the heat generated by the battery cell 210. At the same time, the two phase change material layers 230 can also have a certain isolation effect, i.e., the two phase change material layers 230 can act as heat-absorbing media to delay the heat transfer of the tab 221, the adapter 222 and the pole 223 to the battery cell 210, thereby reducing the probability of the battery cell 210 being affected by the high temperature of the tab 221, the adapter 222 and the pole 223.

[0088] In some embodiments, the two phase change material layers 230 between the first connecting portion 2211 and the connecting surface 211 and between the second connecting portion 2221 and the connecting surface 211 can also be connected to form an integrated whole, so as to simultaneously absorb the heat generated by the tab 221 and the adapter 222 by using a larger phase change material layer 230. That is, the orthographic projection of the first connecting portion 2211 and the second connecting portion 2221 on the connecting surface 211 can be located within the coverage range of the orthographic projection of the phase change material layer 230 on the connecting surface 211.

[0089] In this way, the tab 221 and the adapter 222 can share the same phase change material layer 230 arranged on the connecting surface 211 for cooling, and the larger phase change material layer 230 can absorb more heat, so that the cooling effect of the tab 221 and the adapter 222 is better. At the same time, arranging only one phase change material layer 230 on the connecting surface 211 can also reduce the number of phase change material layers 230, so as to simplify the structure and the assembly process of the battery monomer 200.

[0090] In some embodiments, the phase change material layer 230 can also not be limited to being arranged between the first connecting portion 2211 and the connecting surface 211, and part of the phase change material layer 230 can also extend beyond the coverage range of the orthographic projection of the first connecting portion 2211 on the connecting surface 211, so as to expand the volume of the phase change material layer 230, thereby improving the heat absorption performance of the phase change material layer 230. Similarly, the phase change material layer 230 between the second connecting portion 2221 and the connecting surface 211 can also extend beyond the coverage range of the orthographic projection of the second connecting portion 2221 on the connecting surface 211.

[0091] Please refer to Figures 7-8 , Figure 7 Figure 3 is another partial cross-sectional structure diagram of the battery monomer 200 along V-V in FIG. 2, Figure 8 Figure 3 is another partial cross-sectional structure diagram of the battery monomer 200 along V-V in FIG. 2, Figure 9 Figure 3 is another partial cross-sectional structure diagram of the battery monomer 200 along V-V in FIG. 2.

[0092] In some embodiments, the gap between the electrode 220 and the core 210 is small, so it is difficult to arrange the phase change material layer 230 between the electrode 220 and the core 210, and the flexibility of arrangement is poor. In order to solve this technical problem, the battery monomer 200 provided by the embodiments of the present application can also include a carrier 240. As shown in FIG. 2, Figures 7-8 ​​​​​​​​​​​As shown, the carrier 240 can be arranged on the connecting surface 211 of the battery cell 210 and between the electrode 220 and the connecting surface 211. The phase change material layer 230 can be arranged on the carrier 240 and between the carrier 240 and the electrode 220.

[0093] The carrier 240 can have a certain hardness to facilitate the carrier 240 to carry the phase change material layer 230 and to be assembled with the battery cell 210. Meanwhile, the carrier 240 can also have an insulating property to be electrically isolated from the battery cell 210 and the electrode 220. In addition, the carrier 240 can also have a relatively high melting point temperature to reduce the probability of the carrier 240 melting at a high temperature of the electrode 220, thereby affecting the electrical conduction between the battery cell 210 and the electrode 220. In the embodiment, the carrier 240 can be fixed on the connecting surface 211 of the battery cell 210 by means of adhesion. Of course, the connection mode of the carrier 240 and the battery cell 210 can also be various, such as clamping, etc., which will not be enumerated one by one in the embodiment.

[0094] In some embodiments, the carrier 240 can also have good thermal conductivity to quickly transfer the heat released by the phase change material layer 230 to other areas of the battery cell 210 for heat dissipation, so as to improve the heat dissipation performance of the battery monomer 200.

[0095] Through the above arrangement, the carrier 240 can be used to pre-arrange the phase change material layer 230, and then the carrier 240 arranged with the phase change material layer 230 is assembled to the battery cell 210, and the phase change material layer 230 on the carrier 240 is matched with the electrode 220 to absorb the heat generated by the electrode 220. Compared with the scheme without the carrier 240, the difficulty of arranging the phase change material layer 230 by using the carrier 240 is lower, and the flexibility of arranging the phase change material layer 230 on the carrier 240 is also stronger.

[0096] In some embodiments, the carrier 240 can also limit the phase change material layer 230 to reduce the probability of the phase change material layer 230 being deviated in position during the assembly process or during the phase change process. As shown, Figures 7-8 As shown, the carrier 240 can be arranged on the connecting surface 211 of the battery cell 210 and between the electrode 220 and the connecting surface 211. The phase change material layer 230 can be arranged on the carrier 240 and between the carrier 240 and the electrode 220.

[0097] The limiting groove 2411 can be formed by recessing part of the limiting structure 241 towards the connecting surface 211, and the depth of the limiting groove 2411 in the first direction X can be smaller than the thickness of the phase change material layer 230, so that the phase change material layer 230 can be arranged protruding from the limiting groove 2411, so as to facilitate the phase change material layer 230 to contact the electrode 220, thereby improving the heat conduction efficiency between the phase change material layer 230 and the electrode 220. Of course, in some embodiments, the limiting groove 2411 can also be formed by machining the limiting structure 241 with a milling cutter or other tools, and in order to form the limiting groove 2411, the limiting structure 241 can be locally thickened to reduce the impact of machining the limiting groove 2411 on the structural strength of the carrier 240.

[0098] In some embodiments, in addition to limiting the phase change material layer 230 by forming the limiting groove 2411, the limiting structure 241 can also limit the phase change material layer 230 in other ways. For example, part of the limiting structure 241 can be arranged protruding away from the connecting surface 211, and form a plurality of protrusions with a height lower than the phase change material layer 230 distributed around the phase change material layer 230, and the plurality of protrusions can be continuous or separated, so as to limit the phase change material layer 230 by the protrusions distributed around the phase change material layer 230.

[0099] By arranging the limiting structure 241 on the carrier 240, and the limiting structure 241 can limit the phase change material layer 230 in a direction parallel to the connecting surface 211, so that the limiting structure 241 can limit the phase change material layer 230 during the assembly of the carrier 240 and the battery cell 210, when the phase change material layer 230 fails to bond with the carrier 240 due to high temperature, or when the phase change material layer 230 forms a position offset during the phase change process, so that the phase change material layer 230 can correspond to the electrode 220 to absorb the heat generated by the electrode 220.

[0100] In some embodiments, the carrier 240 can also be elastic and can generate elastic force acting on the phase change material layer 230 to make the phase change material layer 230 abut against the electrode 220 in the first direction X. For example, the carrier 240 can be made of elastic materials such as silica gel, rubber, soft plastic, etc. After assembly, the carrier 240 can be elastically deformed by the pressing of the electrode 220 and generate elastic force acting on the phase change material layer 230 to drive the phase change material layer 230 to abut against the electrode 220, so that the phase change material layer 230 can be in close contact with the electrode 220, thereby improving the heat conduction efficiency between the phase change material layer 230 and the electrode 220. In this embodiment, when the carrier 240 is made of elastic materials such as silica gel, rubber, soft plastic, etc., the melting point temperature of the carrier 240 is at least greater than 130° C to reduce the probability of melting of the carrier 240 under the high temperature influence of the electrode 220.

[0101] Unlike the foregoing embodiments without the carrier 240, in this embodiment, the phase change material layer 230 is carried by the carrier 240, so the phase change material layer 230 and the carrier 240 can be arranged between the lug 221 and / or the adapter 222 and the connecting surface 211. Hereinafter, only the cases that the phase change material layer 230 and the carrier 240 are arranged between the lug 221 and the connecting surface 211 and between the adapter 222 and the connecting surface 211 are exemplarily described. Figures 7-8 As shown in FIG. 10, the first connecting portion 2211 and the connecting surface 211 are not only provided with the carrier 240 located on the connecting surface 211, but also provided with the phase change material layer 230 located between the carrier 240 and the first connecting portion 2211. Similarly, the second connecting portion 2221 and the connecting surface 211 are not only provided with the carrier 240 located on the connecting surface 211, but also provided with the phase change material layer 230 located between the carrier 240 and the second connecting portion 2221.

[0102] By arranging the carrier 240 and the phase change material layer 230 between the first connecting portion 2211 and the connecting surface 211 and between the second connecting portion 2221 and the connecting surface 211, two carriers 240 can be used to carry two phase change material layers 230, so as to reduce the difficulty of arranging the two phase change material layers 230 and improve the flexibility of the layout of the two phase change material layers 230.

[0103] In some embodiments, the two carriers 240 between the first connecting portion 2211 and the connecting surface 211 and between the second connecting portion 2221 and the connecting surface 211 can also be connected to form a whole, so as to use one larger carrier 240 to carry two phase change material layers 230. As shown in FIG. 11, the two carriers 240 can be connected by a connecting portion 2401. Figure 9As shown, the carrier 240 can have a first bearing portion 242 located between the first connecting portion 2211 and the connecting surface 211, and a phase change material layer 230 is arranged between the first bearing portion 242 and the first connecting portion 2211. Meanwhile, the carrier 240 can also have a second bearing portion 243 located between the second connecting portion 2221 and the connecting surface 211, and a phase change material layer 230 is arranged between the second bearing portion 243 and the second connecting portion 2221. In addition, the first bearing portion 242 and the second bearing portion 243 can be connected, and both the first bearing portion 242 and the second bearing portion 243 can be part of the carrier 240. In this way, the two phase change material layers 230 can share the same carrier 240 for arrangement, so as to reduce the number of carriers 240, thereby simplifying the structure and assembly process of the battery monomer 200.

[0104] In some embodiments, in addition to the two carriers 240 being connected to form an integral body between the first connecting portion 2211 and the connecting surface 211, and between the second connecting portion 2221 and the connecting surface 211, the two phase change material layers 230 can also be connected to form an integral body between the first connecting portion 2211 and the connecting surface 211, and between the second connecting portion 2221 and the connecting surface 211. That is, the phase change material layer 230 can be located on the side of the carrier 240 away from the connecting surface 211, and the phase change material layer 230 can cover the first bearing portion 242 and the second bearing portion 243 at the same time, so that part of the phase change material layer 230 can be located between the first bearing portion 242 and the first connecting portion 2211, and another part of the phase change material layer 230 can be located between the second bearing portion 243 and the second connecting portion 2221.

[0105] In this way, the tab 221 and the adapter 222 can share the same phase change material layer 230 arranged on the carrier 240 for cooling, and the phase change material layer 230 can be arranged with one carrier 240, so as to reduce the number of phase change material layers 230 and carriers 240, thereby simplifying the structure and assembly process of the battery monomer 200.

[0106] In some embodiments, the carrier 240 can also not be limited to being arranged between the first connecting portion 2211 and the connecting surface 211, and between the second connecting portion 2221 and the connecting surface 211, and part of the carrier 240 can also extend beyond the coverage range of the orthographic projection of the first connecting portion 2211 and the second connecting portion 2221 on the connecting surface 211, so as to expand the volume (area) of the carrier 240, thereby improving the layout flexibility of the phase change material layer 230 on the carrier 240.

[0107] Please refer again to Figure 5 and Figure 7In addition to the phase change material layer 230 between the second connecting part 2221 and the connecting face 211, the adapter 222 can also be independently provided with a phase change material layer 230. As shown in Figure 5 and Figure 7 The side of the adapter 222 away from the connecting face 211 has a first surface 222a covered by the pole 223 and a second surface 222b not covered by the pole 223, and the second surface 222b can be provided with a phase change material layer 230. The first surface 222a can be used to connect the pole 223 to reduce the probability of the phase change material layer 230 affecting the electrical connection of the pole 223 and the adapter 222. The second surface 222b can be another surface of the adapter 222 not covered by the pole 223, and the second surface 222b can be covered with a phase change material layer 230 to cooperate with the phase change material layer 230 between the second connecting part 2221 and the connecting face 211 to absorb the heat generated by the adapter 222. In this way, the rapid cooling of the adapter 222 can be further achieved, thereby reducing the impact of the high temperature of the electrode 220 on the battery cell 210.

[0108] Because the temperature of the adapter 222 at different positions is different, the phase change material layer 230 on the second surface 222b can also conduct targeted heat dissipation for the adapter 222. As shown in Figure 5 and Figure 7 The phase change material layer 230 on the second surface 222b can include a first heat absorption area 231, a second heat absorption area 232, and a third heat absorption area 233. The first heat absorption area 231 can be arranged close to the pole 223, the second heat absorption area 232 can be arranged away from the pole 223, and can be connected to the side of the tab 221 (the first connecting part 2211) away from the connecting face 211. The third heat absorption area 233 is located between the first heat absorption area 231 and the second heat absorption area 232, and the volume of the third heat absorption area 233 can be greater than the volume of the first heat absorption area 231 and the second heat absorption area 232.

[0109] For example, the thickness of the third heat absorption area 233 in the first direction X can be greater than the thickness of the first heat absorption area 231 and the second heat absorption area 232 in the first direction X, so that the volume of the third heat absorption area 233 can be greater than the volume of the first heat absorption area 231 and the second heat absorption area 232. Or, the area of the third heat absorption area 233 in the connecting face 211 can be greater than the area of the first heat absorption area 231 and the second heat absorption area 232 in the connecting face 211, so that the volume of the third heat absorption area 233 can be greater than the volume of the first heat absorption area 231 and the second heat absorption area 232. Or, the thickness of the third heat absorption area 233 in the first direction X and the area of the third heat absorption area 233 in the connecting face 211 can be greater than the thickness of the first heat absorption area 231 and the second heat absorption area 232 in the first direction X and the area of the first heat absorption area 231 and the second heat absorption area 232 in the connecting face 211.

[0110] Through the above arrangement, not only the third heat absorption area 233 with a larger volume is used to cool the central area (higher temperature) of the adapter 222 between the tab 221 and the pole 223, but also the first heat absorption area 231 and the second heat absorption area 232 with smaller volumes are used to cool the edge area (slightly lower temperature than the central area) of the adapter 222 connected with the tab 221 and the pole 223, so as to realize the targeted heat dissipation of the phase change material layer 230 on the second surface 222b to the adapter 222. Compared with the scheme that the volumes of the first heat absorption area 231 and the second heat absorption area 232 are equal to the volume of the third heat absorption area 233, the use of the phase change material layer 230 can be reduced without changing the cooling efficiency of the adapter 222.

[0111] In some embodiments, the first heat absorption area 231, the second heat absorption area 232 and the third heat absorption area 233 can also be understood as three independent phase change material layers 230, and the volume of the phase change material layer 230 corresponding to the third heat absorption area 233 can be greater than the volumes of the two phase change material layers 230 corresponding to the first heat absorption area 231 and the second heat absorption area 232 respectively.

[0112] Please refer to Figure 6 and Figure 8 , in addition to the phase change material layer 230 can be arranged between the first connecting part 2211 and the connecting surface 211, the tab 221 can also be independently provided with a phase change material layer 230. As shown in Figure 6 and Figure 8 , the tab 221 has an outer surface 221a connected with the adapter 222, and the phase change material layer 230 can be arranged on the part of the surface of the outer surface 221a which is not covered by the adapter 222, so as to use the phase change material layer 230 on the outer surface 221a to cooperate with the phase change material layer 230 on the connecting surface 211 to absorb the heat generated by the tab 221. In this way, the tab 221 can be further cooled quickly, thereby reducing the influence of the high temperature of the electrode 220 on the battery cell 210.

[0113] Specifically, the tab 221 can have an outer surface 221a and an inner surface 221b arranged oppositely in the thickness direction of the tab 221. The outer surface 221a can be a surface of the tab 221 facing away from the phase change material layer 230 arranged on the connecting surface 211, and part of the outer surface 221a can be arranged oppositely to the connecting surface 211, so that the adapter 222 can be connected to the tab 221 through the part of the outer surface 221a facing away from the connecting surface 211, and the part of the outer surface 221a not covered by the adapter 222 can be provided with the phase change material layer 230 to cooperate with the phase change material layer 230 arranged on the connecting surface 211 to absorb the heat generated by the tab 221. The inner surface 221b can be a surface of the tab 221 facing the phase change material layer 230 arranged on the connecting surface 211, and part of the inner surface 221b can also be in contact with the phase change material layer 230 arranged on the connecting surface 211 to facilitate the tab 221 to transfer heat to the phase change material layer 230 arranged on the connecting surface 211.

[0114] In some embodiments, the phase change material layer 230 on the connecting surface 211 or the carrier 240, the phase change material layer 230 on the second surface 222b, and the phase change material layer 230 on the outer surface 221a can be the same or different, for example, all the three phase change material layers 230 can be heat absorption blocks or heat absorption films, or one of the three phase change material layers 230 is a heat absorption block, and the other two are heat absorption films or heat absorption coatings. At the same time, since the three phase change material layers 230 are arranged in different positions, the three phase change material layers 230 can be different in volume to adapt to the space of their installation positions respectively.

[0115] In some embodiments, the phase change material layer 230 can also be arranged on part of the pole 223, and in order not to affect the assembly of the pole 223 and the shell 250 of the battery monomer 200, the phase change material layer 230 on the pole 223 can be a heat absorption coating. At the same time, the pole 223 is exposed at one end of the battery monomer 200, and the end of the pole 223 connected to the adapter 222 is not covered by the phase change material layer 230, so that the phase change material layer 230 will not affect the electrical connection of the pole 223 with the external circuit and the adapter 222.

[0116] Please refer to Figure 10 , Figure 10 is a schematic view of the cross section structure of the phase change material layer 230 provided by the embodiments of the present application.

[0117] In some embodiments, in order to improve the cooling effect of the phase change material layer 230, the phase change material layer 230 provided by the embodiments of the present application can further include a heat storage area 2301 and a cooling area 2302. As shown in Figure 10As shown, the heat storage area 2301 can be in contact with the cooling area 2302, the heat storage area 2301 can be used to absorb the heat generated by the electrode 220 and release the heat after the phase change is completed, and the cooling area 2302 can be used to conduct the heat absorbed and released by the heat storage area 2301. In this way, the cooling area 2302 can be used to quickly transfer the heat absorbed and released by the heat storage area 2301, so as to improve the cooling effect of the phase change material layer 230.

[0118] The heat storage area 2301 can contain solid-solid phase change material and solid-liquid phase change material, so that the heat storage area 2301 can absorb the heat generated by the electrode 220 and release the heat after the phase change is completed. The cooling area 2302 can contain fluorinated liquid and other coolants, so that the cooling area 2302 can quickly conduct the heat absorbed and released by the heat storage area 2301, so as to improve the cooling effect of the phase change material layer 230. At the same time, when the cooling area 2302 contains liquid coolants such as fluorinated liquid, the phase change material layer 230 can also include an encapsulation area 2303, that is, the above-mentioned encapsulation film (such as aluminum plastic film, PET film or PP film), so as to encapsulate the heat storage area 2301 and the cooling area 2302 by using the encapsulation area 2303. In addition, the cooling area 2302 can be arranged around the heat storage area 2301 as shown in the middle, or can be arranged on one or more sides of the heat storage area 2301, as long as the cooling area 2302 can be in contact with the heat storage area 2301 to transfer the heat absorbed and released by the heat storage area 2301. Figure 10 In addition, the cooling area 2302 can be arranged around the heat storage area 2301 as shown in the middle, or can be arranged on one or more sides of the heat storage area 2301, as long as the cooling area 2302 can be in contact with the heat storage area 2301 to transfer the heat absorbed and released by the heat storage area 2301.

[0119] Please refer to Figure 4 and Figure 5 , in order to protect the battery cell 210, the battery monomer 200 can also include a shell 250. As shown in Figure 4 and Figure 5 , the shell 250 can have a containing space 2501, the battery cell 210 can be arranged in the containing space 2501, and the tab 221, the adapter 222 and the pole 223 can be located between the connecting surface 211 and the shell 250. At the same time, the end of the pole 223 away from the adapter 222 can also be arranged through the shell 250 and exposed outside the containing space 2501 to be electrically connected with the external circuit. In this way, the shell 250 can be used to accommodate various structural members required by the battery monomer 200, so as to protect various structural members of the battery monomer 200.

[0120] The shell 250 comprises a top cover 251 and a bottom shell 252. The bottom shell 252 can be an open structure with an opening, and the top cover 251 can be covered on the opening of the bottom shell 252 and can be cooperated with the bottom shell 252 to form a containing space 2501 which is isolated from the external environment. Meanwhile, the top cover 251 can be arranged opposite to the connecting surface 211, and the pole lug 221, the adapter 222 and the pole column 223 can be located between the connecting surface 211 and the top cover 251, and the end of the pole column 223 away from the adapter 222 can be penetrated through the top cover 251 to be exposed on the side of the top cover 251 away from the containing space 2501.

[0121] In some embodiments, the materials of the top cover 251 and the bottom shell 252 can be the same, and the top cover 251 and the bottom shell 252 can be made of metal materials with high hardness and strength, such as aluminum alloy, to improve the structural strength of the shell 250. Of course, the materials of the top cover 251 and the bottom shell 252 can not be limited to metal materials. For example, the top cover 251 and the bottom shell 252 can also be made of materials with light weight, such as hard plastic, so that the shell 250 has certain structural strength and light weight at the same time.

[0122] The battery device 10 provided in the application can comprise the battery cell 200 in any of the foregoing embodiments. Thus, the service life and reliability of the battery device 10 can be improved by using the battery cell 200 with long service life.

[0123] The power consuming device 1 provided in the application can comprise the battery device 10 in any of the foregoing embodiments, and the battery device 10 can be used to provide electric energy. Thus, the electric energy can be provided for the power consuming device 1 by using the battery device 10 with high reliability, so as to reduce the probability of power failure of the power consuming device 1.

[0124] Finally, in some specific application scenarios, the existing battery monomer 200 is fast-charged, and the temperature rises too fast and too high. The battery monomer 200 provided by the application can include: an electric core 210, an electrode 220, and a phase change material layer 230; the electrode 220 is arranged on the electric core 210 and is electrically connected with the electric core 210; at least a part of the electric core 210 and at least a part of the electrode 220 are provided with the phase change material layer 230. The electric core 210 has a connecting surface, and the electrode 220 is located on the connecting surface 211; the phase change material layer 230 is arranged on the connecting surface 211 and is located between the electrode 220 and the connecting surface 211. The electrode 220 includes: a tab 221, a transfer piece 222, and a pole 223; the tab 221 is connected with the electric core 210 and is located on the connecting surface 211; the transfer piece 222 is located on the connecting surface 211 and is connected with a side of the tab 221 away from the connecting surface 211; the pole 223 is connected with a side of the transfer piece 222 away from the connecting surface 211, and the tab 221 and the pole 223 are spaced apart in the orthographic projection on the connecting surface 211. The tab 221 has a first connecting part 2211 opposite and spaced apart from the connecting surface 211, the transfer piece 222 is connected with a side of the first connecting part 2211 away from the connecting surface 211, and the phase change material layer 230 is arranged between the first connecting part 2211 and the connecting surface 211; the transfer piece 222 has a second connecting part 2221 opposite and spaced apart from the connecting surface 211, the pole 223 is connected with a side of the second connecting part 2221 away from the connecting surface 211, and the phase change material layer 230 is arranged between the second connecting part 2221 and the connecting surface 211. A side of the transfer piece 222 away from the connecting surface 211 has a first surface 222a covered by the pole 223 and a second surface 222b not covered by the pole 223; the second surface 222b is also provided with the phase change material layer 230. The tab 221 has an outer surface 221a with a part of the surface connected with the transfer piece 222, and the phase change material layer 230 is arranged on a part of the surface of the outer surface 221a not covered by the transfer piece 222.

[0125] The battery monomer 200 provided by the embodiment of the application can utilize the phase change material layer 230 to absorb the heat generated by the electric core 210 and / or the electrode 220 during the charging of the battery monomer 200, so as to rapidly cool the electric core 210 and / or the electrode 220, thereby reducing the probability of high temperature of the battery monomer 200 and improving the service life of the battery monomer 200.

[0126] It should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, but not to limit the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features thereof can be replaced equivalently; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and should be included in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0127] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application; any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery cell, characterized by, The battery cell comprises an electric core, an electrode and a phase change material layer; The electrode is arranged on the electric core and electrically connected with the electric core; the phase change material layer is arranged on at least a partial region of the electric core and / or at least a partial region of the electrode.

2. The battery cell of claim 1, wherein, The electric core has a connecting surface, and the electrode is located on the connecting surface; the phase change material layer is arranged on the connecting surface and between the electrode and the connecting surface.

3. The battery cell of claim 2, wherein, The electrode comprises a tab, an adapter and a pole; The tab is connected with the electric core and located on the connecting surface; the adapter is located on the connecting surface and connected with a side of the tab away from the connecting surface; the pole is connected with a side of the adapter away from the connecting surface, and the projections of the tab and the pole on the connecting surface are spaced apart.

4. The battery cell of claim 3, wherein, The tab has a first connecting portion arranged opposite to and spaced apart from the connecting surface; the adapter is connected with a side of the first connecting portion away from the connecting surface; and the phase change material layer is arranged between the first connecting portion and the connecting surface; and / or, The adapter has a second connecting portion arranged opposite to and spaced apart from the connecting surface; the pole is connected with a side of the second connecting portion away from the connecting surface; and the phase change material layer is arranged between the second connecting portion and the connecting surface.

5. The battery cell of claim 3, wherein, The tab has a first connecting portion arranged opposite to and spaced apart from the connecting surface; the adapter is connected with a side of the first connecting portion away from the connecting surface; The adapter has a second connecting portion arranged opposite to and spaced apart from the connecting surface; the pole is connected with a side of the second connecting portion away from the connecting surface; The projections of the first connecting portion and the second connecting portion on the connecting surface are located within the coverage range of the projection of the phase change material layer on the connecting surface.

6. The battery cell of claim 1, wherein, The battery cell further comprises a carrier; The electric core has a connecting surface, and the electrode is located on the connecting surface; the carrier is arranged on the connecting surface and between the electrode and the connecting surface; and the phase change material layer is arranged on the carrier and between the carrier and the electrode.

7. The battery cell of claim 6, wherein, The carrier has a limiting structure relative to a partial region of the phase change material layer, and the limiting structure is configured to limit the position of the phase change material layer in a direction parallel to the connecting surface.

8. The battery cell of claim 7, wherein, A side of the limiting structure facing the electrode has a limiting groove, and the phase change material is arranged in the limiting groove.

9. The battery cell according to claim 6 or 7, characterized in that, The carrier is elastic and configured to generate an elastic force acting on the phase change material layer, so that the phase change material layer abuts against the electrode in a direction perpendicular to the connecting surface.

10. The battery cell of claim 6, wherein, The electrode comprises a tab, an adapter and a pole; The tab is connected with the electric core and located on the connecting surface; the adapter is located on the connecting surface and connected with a side of the tab away from the connecting surface; the pole is connected with a side of the adapter away from the connecting surface, and the projections of the tab and the pole on the connecting surface are spaced apart.

11. The battery cell of claim 10, wherein, The lug has a first connecting part opposite and spaced from the connecting surface, and the adapter is connected to a side of the first connecting part away from the connecting surface; the first connecting part and the connecting surface are provided with the carrier, and the phase change material layer is located between the carrier and the first connecting part; and / or, The adapter has a second connecting part opposite and spaced from the connecting surface, and the pole is connected to a side of the second connecting part away from the connecting surface; the second connecting part and the connecting surface are provided with the carrier, and the phase change material layer is located between the carrier and the second connecting part.

12. The battery cell of claim 10, wherein, The lug has a first connecting part opposite and spaced from the connecting surface, and the adapter is connected to a side of the first connecting part away from the connecting surface; the adapter has a second connecting part opposite and spaced from the connecting surface, and the pole is connected to a side of the second connecting part away from the connecting surface; The carrier has a first bearing part between the first connecting part and the connecting surface, and the phase change material layer is located between the first bearing part and the first connecting part; the carrier also has a second bearing part between the second connecting part and the connecting surface, and the phase change material layer is also located between the second bearing part and the second connecting part.

13. The battery cell of claim 10, wherein, The lug has a first connecting part opposite and spaced from the connecting surface, and the adapter is connected to a side of the first connecting part away from the connecting surface; the adapter has a second connecting part opposite and spaced from the connecting surface, and the pole is connected to a side of the second connecting part away from the connecting surface; The carrier has a first bearing part between the first connecting part and the connecting surface, and the carrier also has a second bearing part between the second connecting part and the connecting surface; the phase change material layer is located on a side of the carrier away from the connecting surface and covers the first bearing part and the second bearing part.

14. The battery cell of claim 3 or 10, wherein, The side of the adapter away from the connecting surface has a first surface covered by the pole and a second surface not covered by the pole; wherein the second surface is also provided with the phase change material layer.

15. The battery cell of claim 14, wherein, The phase change material layer on the second surface includes: a first heat absorption area, a second heat absorption area, and a third heat absorption area; The first heat absorption area is arranged close to the pole, the second heat absorption area is arranged away from the pole, and is connected to a side of the lug away from the connecting surface; the third heat absorption area is located between the first heat absorption area and the second heat absorption area, and the volume of the third heat absorption area is greater than the volume of the first heat absorption area and the second heat absorption area.

16. The battery cell of claim 3 or 10, wherein, The lug has an outer surface with a part of the surface connected to the adapter, and the phase change material layer is arranged on the part of the surface of the outer surface not covered by the adapter.

17. The battery cell of claim 3 or 10, wherein, The battery cell also includes: a shell; The shell has a containing space, the electric core is arranged in the containing space, the lug, the adapter and the pole are located between the connecting surface and the shell, and an end of the pole away from the adapter is arranged in the shell and exposed outside the containing space.

18. The battery cell of claim 1, wherein, The phase change material layer comprises a heat storage area and a cooling area. The heat storage area is connected with the cooling area, the heat storage area is configured to absorb and release heat emitted by the electrode, and the cooling area is configured to conduct heat absorbed and released by the heat storage area.

19. A battery device characterized by comprising: The battery device comprises at least one battery cell according to any one of claims 1-18.

20. An electrical device, comprising: The power utilization device comprises the battery device according to claim 19, and the battery device is used to provide electric energy.

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