Battery and electrical device

Abstract

A battery (1001) and an electrical device. The battery (1001) comprises: a casing (200), comprising a plurality of frames (202) forming side walls of the casing (200); and a plurality of battery cells (100), which are mounted in the casing (200), wherein the plurality of battery cells (100) comprise a first type of battery cells (101) and a second type of battery cells (102), the battery cells (100) at least abutting against the frames (202) being the second type of battery cells (102), and the energy density of the second type of battery cells (102) being greater than the energy density of the first type of battery cells (101). By using the second type of battery cells (102) as the battery cells (100) abutting against the frames (202), the battery cells (100) have better charging and discharging performance at low temperatures, thereby effectively improving the heat preservation performance and the charging and discharging performance of the battery (1001) at low temperatures, and reducing the temperature difference.

Description

Batteries and electrical devices Technical Field

[0001] The present application belongs to the field of battery technology, and more specifically, relates to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of this sustainable development. Battery technology is a crucial factor in the development of electric vehicles. However, current batteries experience significant internal temperature differences in low-temperature environments, significantly reducing charging and discharging efficiency and impacting user experience.

[0003] Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a battery and an electrical device to solve the problem in the related art that the charging and discharging efficiency of the battery will be greatly reduced in a low temperature environment.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] The box body includes a plurality of frames constituting side walls of the box body;

[0007] Multiple battery cells are installed in a box;

[0008] The plurality of battery cells include first-type battery cells and second-type battery cells. At least the battery cells abutting the frame are second-type battery cells, and the energy density of the second-type battery cells is greater than that of the first-type battery cells.

[0009] Because heat from battery cells dissipates from the housing in low-temperature environments, the heat from battery cells abutting the frame is more easily absorbed by the frame. In the technical solution of the present embodiment, the battery cells abutting the frame use the second type of battery cells, which gives them a high energy density and better charge and discharge performance at low temperatures. This effectively improves the battery's thermal insulation and charge and discharge performance at low temperatures, and mitigates temperature differences.

[0010] In some embodiments, the total capacity of the second type of battery cells is less than the total capacity of the first type of battery cells.

[0011] By setting the total capacity of the second type of battery cells to be smaller, the first type of battery cells in the battery can be used as the main force for charging and discharging, thereby reducing costs.

[0012] In some embodiments, the number of battery cells of the first type is greater than the number of battery cells of the second type.

[0013] The number of the first type of battery cells is greater than the number of the second type of battery cells, so that the total capacity of the first type of battery cells is set larger, so that the first type of battery cells are the main force of charging and discharging of the battery, thereby reducing costs.

[0014] In some embodiments, the second type of battery cells are connected in series with the first type of battery cells, and the capacity of a single second type of battery cell is greater than the capacity of a single first type of battery cell.

[0015] The larger the capacity of a battery cell, the greater its charge and discharge current. Among battery cells connected in series, smaller capacity cells also have smaller charge and discharge currents. Furthermore, these cells with smaller charge and discharge currents can become bottlenecks limiting the overall charge and discharge performance of the series cells. This means that smaller capacity cells can affect the overall charge and discharge performance of the series cells. Since the first-type battery cells in the housing are the primary drivers of the battery's charge and discharge, setting the capacity of a single second-type battery cell larger than that of a single first-type battery cell can reduce the likelihood that the second-type battery cell will become a bottleneck limiting the charge and discharge performance of the series cells, thereby improving the overall charge and discharge performance of the battery.

[0016] In some embodiments, a thermal insulation layer is provided between the second type battery cells and the frame.

[0017] Since the second type of battery cells are in contact with the frame and are closer to the frame, an insulation layer is provided between the second type of battery cells and the frame. In a low temperature environment, the rate at which heat from the second type of battery cells is conducted to the frame can be better reduced, thereby improving the thermal insulation performance and charge and discharge performance of the battery at low temperatures.

[0018] In some embodiments, multiple battery cells are arranged in rows along the length direction of the box and in the width direction of the box; the frame includes a first frame arranged along the length direction of the box and a second frame arranged along the width direction of the box, at least one column of battery cells adjacent to the first frame adopts the second type of battery cells, and / or at least one row of battery cells adjacent to the second frame adopts the second type of battery cells.

[0019] Using the second type of battery cells in at least one column of battery cells adjacent to the first frame and / or using the second type of battery cells in at least one row of battery cells adjacent to the second frame can effectively improve the thermal insulation performance and charge and discharge performance of the battery at low temperatures and improve the temperature difference.

[0020] In some embodiments, a thermal management component is installed in the box, and the thermal management component is thermally connected to the battery cell.

[0021] A thermal management component is provided and thermally connected to the battery cell so as to heat or cool the battery cell through the thermal management component to provide a stable temperature environment for the battery cell, thereby facilitating stable charging and discharging of the battery cell.

[0022] In some embodiments, each battery cell has a first end face at one end along the height direction, and the first end face is provided with an electrode terminal; the thermal management component includes a first thermal management component, each first end face is bonded and fixed to the first thermal management component by a thermally conductive structural adhesive, and the first thermal management component is provided with a first opening exposing each electrode terminal.

[0023] The first end face of the battery cell is bonded and fixed to the first thermal management component by means of a thermally conductive structural adhesive, so that the first end face of the battery cell is fixed by the first thermal management component, and multiple battery cells are connected into a whole, so as to improve the overall structural strength of the battery, effectively resist the expansion and deformation of the battery cell, and reduce the risk of failure of the battery cell due to expansion and deformation; and the battery cell can be heated or cooled by the first thermal management component to make the temperature environment of the battery cell more stable; bonding and fixing the first thermal management component to the first end face can effectively save the height space in the battery, which is beneficial to improving the energy density and volume utilization of the battery.

[0024] In some embodiments, the battery further comprises:

[0025] A glue blocking structure is arranged around the edge of each first end surface;

[0026] The glue blocking structure is arranged between the battery cell and the first thermal management component.

[0027] A glue blocking structure is provided and arranged around the edges of each first end face to prevent the thermally conductive structural adhesive from overflowing to the side of the battery cell, thereby reducing the risk of the normal charging and discharging expansion and deformation of the battery cell due to the presence of solidified thermally conductive structural adhesive between adjacent battery cells, thereby reducing the risk of reducing the life of the battery cell.

[0028] In some embodiments, the glue blocking structure is further disposed around each first opening.

[0029] The adhesive blocking structure surrounds each first opening to prevent the thermal conductive adhesive from overflowing to the first opening, thereby reducing the impact of the thermal conductive adhesive overflowing to the first opening on the connection between the electrode terminal and the busbar.

[0030] In some embodiments, a pressure relief mechanism is provided on the first end surface, an exhaust mechanism is provided on the first thermal management component and is respectively opposite to each pressure relief mechanism, and a rubber retaining structure is provided around each exhaust mechanism.

[0031] A pressure relief mechanism is provided on the first end face so that the internal pressure of the battery cell can be released when the battery cell expands excessively to protect the battery cell; and a second opening is provided on the first thermal management component to facilitate pressure relief by the pressure relief mechanism; the glue blocking structure is made to surround the exhaust mechanism to prevent the thermal conductive structural glue from overflowing to the exhaust mechanism, thereby reducing the risk of affecting the opening of the pressure relief mechanism to relieve pressure.

[0032] In some embodiments, the exhaust mechanism is a second opening provided on the first thermal management component, and an insulating layer is provided on an inner wall of the second opening.

[0033] The second opening is used as the exhaust mechanism, which has a simple structure. An insulating layer is provided on the inner wall of the second opening to reduce the risk of the creepage distance between the busbar and the battery cell being affected by the conductivity of the inner wall of the second opening, thereby improving the safety of the battery.

[0034] In some embodiments, the glue blocking structure includes ribs provided on the first thermal management component and / or the first end surface.

[0035] The rubber blocking structure uses ribs, has a simple structure, and is easy to process and manufacture. When the first thermal management component is connected to the first end face, the rubber blocking structure can be placed between the first thermal management component and the first end face, which is easy to assemble.

[0036] In some embodiments, an insulating layer is disposed on two opposite surfaces of the first thermal management component and an inner wall of the first opening.

[0037] Insulation layers are provided on both sides of the first thermal management component and on the inner wall of the first opening to provide insulation protection and reduce the risk of short circuit of the battery cell.

[0038] In some embodiments, one end of the battery cell along the height direction has a second end surface, the thermal management component includes a second thermal management component, the second thermal management component is disposed in the box, and each second end surface is connected to the second thermal management component.

[0039] A second thermal management component is provided and connected to the second end face so as to heat or cool the battery cell through the second thermal management component to stabilize the temperature environment of the battery cell.

[0040] In some embodiments, each second end surface is bonded and fixed to the second thermal management component by a thermally conductive structural adhesive.

[0041] The second end face of each battery cell is bonded and fixed to the second thermal management component by a thermally conductive structural adhesive to connect multiple battery cells into one, resist expansion and deformation of the battery cells, reduce the risk of battery cell failure due to expansion and deformation, and improve the overall structural strength of the battery.

[0042] In some embodiments, multiple battery cells are arranged in an array; the thermal management component includes a third thermal management component for being adapted to be configured between two adjacent columns or rows of battery cells, the battery cell includes multiple surfaces, and the third thermal management component is connected to the surface with the largest area among the multiple surfaces of the battery cell for heat exchange.

[0043] The battery cell array is arranged in the box to facilitate the layout and installation of the battery cells;

[0044] A third thermal management component is provided between two adjacent columns or rows of battery cells, and the battery cells can be heated or dissipated through the third thermal management component; the third thermal management component is connected to the surface with the largest area among the multiple surfaces of the battery cell for heat exchange, and the third thermal management component can be connected to the large surface of the battery cell for heat conduction, so as to increase the thermal conductive connection area between the third thermal management component and the battery cell, so as to heat or dissipate heat of the battery cell more efficiently.

[0045] In some embodiments, a third thermal management component is provided between any two adjacent columns or any two adjacent rows of battery cells;

[0046] Alternatively, a third thermal management component is provided on one side of each column of battery cells, and two adjacent third thermal management components are spaced apart by two columns of battery cells;

[0047] Alternatively, a third thermal management component is provided on one side of each row of battery cells, and two adjacent third thermal management components are spaced two rows of battery cells apart.

[0048] A third thermal management component is provided between any two adjacent columns or rows of battery cells. Then, among the battery cells in the array, the two columns or rows of battery cells at the ends are thermally connected to one third thermal management component respectively, while the battery cells in the remaining columns or rows are thermally connected to two third thermal management components respectively. In this way, the thermal connection area between the battery cells in the box and the third thermal management component can be larger, thereby better regulating the temperature of the battery cells.

[0049] A third thermal management component is provided on one side of each column of battery cells, and each column of battery cells is thermally connected to a third thermal management component, so that the temperature of each battery cell can be regulated by the third thermal management component, making the battery cell temperature environment more stable.

[0050] A third thermal management component is provided on one side of each row of battery cells, and each row of battery cells is thermally connected to a third thermal management component, so that the temperature of each battery cell can be regulated by the third thermal management component, making the battery cell temperature environment more stable.

[0051] In some embodiments, the battery further includes a flow distribution pipe connected to one end of the flow channel of each third thermal management component and a return pipe connected to the other end of the flow channel of each third thermal management component.

[0052] A distribution pipe and a return pipe are provided to respectively connect the two ends of the flow channel of the third thermal management component to facilitate the supply of coolant to each third thermal management component.

[0053] In some embodiments, the distribution pipe and the return pipe are located at the same end of the third thermal management component.

[0054] A distribution pipe and a return pipe are provided at the same end of the third heat management component, so that the distribution pipe and the return pipe can be led out to connect to an external coolant supply system.

[0055] In some embodiments, the third thermal management component has two groups of flow channels. A current collecting piece is provided at one end of the third thermal management component, and the current collecting piece connects the two groups of flow channels.

[0056] Two groups of flow channels are provided in the third thermal management component, and a current collecting piece is provided to connect the two groups of flow channels, so as to facilitate the processing and manufacturing of the third thermal management component.

[0057] In some embodiments, a reinforcing beam is provided in the box body, and the reinforcing beam extends in a length direction perpendicular to the third thermal management component. A receiving groove for accommodating the current collecting member is provided on the reinforcing beam, and the current collecting member is placed in the corresponding receiving groove.

[0058] A reinforcing beam is provided in the box to increase the structural strength of the battery; a receiving groove is provided on the reinforcing beam, and the current collecting part of the third thermal management component is placed in the corresponding receiving groove. This can reduce the distance between the reinforcing beam and the battery cell, improve the space utilization in the box, improve the overall integration of the battery, and improve the energy density.

[0059] In some embodiments, a liquid inlet pipe and a liquid outlet pipe are installed on the box body, the liquid inlet pipe is connected to one end of the flow channel in the thermal management component, and the liquid outlet pipe is connected to the other end of the flow channel in the thermal management component.

[0060] A liquid inlet pipe and a liquid outlet pipe are provided to connect to an external coolant supply system so that the coolant flows through the thermal management component and then exchanges heat with the thermal management component to heat or cool the battery cell.

[0061] In some embodiments, the thermal management component includes a first extension portion, which extends from one end of the box body in a height direction to the outside of the box body, and the liquid inlet pipe and the liquid outlet pipe are installed on the first extension portion.

[0062] A first extension is provided, and a liquid inlet pipe and a liquid outlet pipe are mounted on the first extension, so that the liquid inlet pipe and the liquid outlet pipe are connected to the thermal management component through the first extension. The first extension extends from one end of the housing in the height direction to the outside of the housing. This facilitates placing the first extension outside the housing without providing an opening structure in the housing, thereby leading the liquid inlet pipe and the liquid outlet pipe out of the housing to facilitate connection of the liquid inlet pipe and the liquid outlet pipe to an external coolant supply system. In some embodiments, the housing includes a sealing plate at an end thereof in the height direction, the sealing plate being located at an end of the housing near the first extension. A second extension extends outward from the sealing plate, and the first extension is sealedly connected to the second extension.

[0063] The second extension portion is provided on the sealing plate of the box body, which not only supports the first extension portion through the second extension portion, but also protects the first extension portion and facilitates the sealing connection of the box body.

[0064] In some embodiments, the frame includes first frames located at both ends of the box in the width direction, each first frame extends along the length direction of the box, the length direction of each battery cell is parallel to the length direction of the box, and the battery cells adjacent to the first frame abut against the first frame; each first frame is provided with a mounting beam.

[0065] The length direction of the battery cell is parallel to the length direction of the box body, and the first frame is made to abut the adjacent battery cell. The first frame is located at the end of the width direction of the box body, so that the first frame abuts the large surface of the adjacent battery cell; and a mounting beam is set on the first frame to facilitate the installation and use of the battery, and the mounting beam can provide a restraining force to resist the expansion and deformation of the battery cell.

[0066] In some embodiments, the first type of battery cell is a sodium ion battery cell, and the second type of battery cell is a lithium ion battery cell; or, the first type of battery cell is a lithium iron phosphate battery cell, and the second type of battery cell is a ternary battery cell.

[0067] By selecting the above-mentioned first type battery cells and second type battery cells, the energy density of the selected second type battery cells can be better made greater than the energy density of the first type battery cells, thereby improving the overall thermal insulation performance, charge and discharge performance and energy density of the battery at low temperatures.

[0068] In a second aspect, an embodiment of the present application provides an electrical device comprising a battery as described in the above embodiment.

[0069] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0071] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0072] FIG2 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0073] FIG3 is a schematic structural diagram of a battery cell provided in some embodiments of the present application;

[0074] FIG4 is a schematic diagram of a structure in which battery cells are distributed in a box according to some embodiments of the present application;

[0075] FIG5 is a schematic diagram of a portion of the structure of the battery in FIG2 ;

[0076] FIG6 is a schematic diagram of a partial structure of the battery in FIG5 ;

[0077] FIG7 is an enlarged view of portion A in FIG6 ;

[0078] FIG8 is a schematic structural diagram of a first thermal management component provided in some embodiments of the present application;

[0079] FIG9 is an enlarged view of portion B in FIG8 ;

[0080] FIG10 is a schematic diagram of the structure of battery cells distributed in a box according to other embodiments of the present application;

[0081] FIG11 is a schematic diagram of the structure of battery cells distributed in a box according to some other embodiments of the present application;

[0082] FIG12 is a schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0083] FIG13 is a schematic structural diagram of a second thermal management component in some embodiments of the present application;

[0084] FIG14 is an enlarged view of portion C in FIG13 ;

[0085] FIG15 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0086] FIG16 is a schematic diagram of the exploded structure of batteries according to other embodiments of the present application;

[0087] FIG17 is an enlarged view of portion D in FIG16 ;

[0088] FIG18 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0089] FIG19 is a schematic diagram of the exploded structure of batteries according to other embodiments of the present application;

[0090] FIG20 is a schematic structural diagram of a third thermal management component provided in some embodiments of the present application;

[0091] FIG21 is an enlarged view of portion E in FIG20 ;

[0092] FIG22 is a schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0093] FIG23 is an enlarged view of portion F in FIG22 ;

[0094] FIG24 is a schematic diagram of the exploded structure of batteries according to other embodiments of the present application;

[0095] FIG25 is a schematic diagram of a partial structure of the battery in FIG24 ;

[0096] FIG26 is an enlarged view of portion G in FIG25 ;

[0097] FIG27 is a schematic diagram of the exploded structure of batteries according to some other embodiments of the present application;

[0098] FIG28 is a schematic diagram of the exploded structure of batteries according to other embodiments of the present application.

[0099] Among them, the main marks of the drawings in the figure are:

[0100] 1000-Vehicle; 1001-Battery; 1002-Controller; 1003-Motor;

[0101] 100 - battery cell; 101 - first type battery cell; 102 - second type battery cell; 11 - end face; 111 - first end face; 112 - second end face; 12 - side face; 121 - first side face; 122 - second side face; 13 - electrode terminal; 14 - pressure relief mechanism;

[0102] 200 - box body; 201 - accommodation space; 2011 - installation space; 2012 - accommodation space; 202 - frame; 2021 - first frame; 2022 - second frame; 21 - lower box body; 22 - cover plate; 221 - second extension portion; 23 -; 24 - reinforcement beam; 241 - accommodation groove; 25 - bottom plate;

[0103] 310 - first thermal management component; 311 - first opening; 312 - second opening; 320 - second thermal management component; 330 - third thermal management component; 331 - current collecting member;

[0104] 410-insulation layer; 420-battery management system; 430-busbar;

[0105] 510-rubber blocking structure; 511-rib; 520-rubber blocking structure; 521-rib;

[0106] 611 - liquid inlet pipe; 612 - liquid outlet pipe; 620 - first extension portion; 631 - distribution pipe; 632 - return pipe. DETAILED DESCRIPTION

[0107] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0108] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0109] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0110] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0111] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0112] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0113] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0114] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0115] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0116] In the description of the embodiments of this application, unless otherwise specified or limited, the technical term "adjacent" refers to proximity in position. For example, if there are three components A1, A2, and B, and the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, or B is adjacent to A2. For another example, when there are multiple components C, the multiple components C are C1, C2, ..., C N , when one of the C components, such as C2, is closer to the B component than other C components, then B is adjacent to C2, or it can be said that C2 is adjacent to B.

[0117] The 4C charging mentioned in the embodiments of this application means that the battery is fully charged within a quarter of an hour (15 minutes), like 3C charging is fully charged within a third of an hour (20 minutes), and 2C is fully charged within half an hour (30 minutes), so 4C charging also refers to fast charging.

[0118] In the embodiments of the present application, the battery cells include but are not limited to lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries. The shapes of the battery cells include but are not limited to flat bodies, rectangular parallelepipeds, etc.

[0119] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery generally includes a housing that encloses one or more battery cells. The housing can, to a certain extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0120] In a battery, when there are multiple battery cells, they can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell structure is housed within a housing. Alternatively, a battery can be constructed by first connecting multiple battery cells in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed within a housing. The battery may also include other structures, such as a busbar assembly for electrically connecting multiple battery cells.

[0121] The battery cell in the embodiment of the present application includes an electrode assembly and a housing, and the electrode assembly is installed in the housing to protect the electrode assembly.

[0122] The electrode assembly is also called a battery cell. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The electrode assembly mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The portion of the positive electrode collector not coated with the positive electrode active material layer protrudes from the portion coated with the positive electrode active material layer. The portion not coated with the positive electrode active material layer serves as the positive electrode tab, or a metal conductor is welded to the positive electrode collector and led out to serve as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is applied to the surface of the negative current collector. The portion of the negative current collector not coated with the negative active material layer protrudes from the portion coated with the negative active material layer. The portion not coated with the negative active material layer serves as the negative electrode tab, or a metal conductor is welded to the negative current collector and extended to serve as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. It is understood that the electrode assembly can have one positive electrode tab and one negative electrode tab. In other words, the electrode assembly is provided with two sets of tabs, each containing at least one tab, with one set being the positive electrode tab and the other being the negative electrode tab.

[0123] The electrode assembly can be a wound structure or a laminated structure. The embodiments of the present application are not limited to this. The wound structure is mostly to weld the tabs to the current collector, and then arrange them in the order of positive electrode sheet - diaphragm - negative electrode sheet - diaphragm; and then form a cylindrical or square battery cell by winding. The laminated structure is mostly to lead out the tabs on the current collector, arrange the positive electrode sheet, negative electrode sheet and diaphragm in the order of positive electrode sheet - diaphragm - negative electrode sheet - diaphragm, and stack them together layer by layer to form a laminated battery cell; wherein, the diaphragm can be cut and directly laminated with the diaphragm sheet, or the diaphragm is not cut, but is folded in a Z shape. The material of the diaphragm can be PP (PolypropylFnF, polypropylene) or PF (PolyFthylFnF, polyethylene) and the like. The separator is an insulating film placed between the positive and negative electrodes. Its main function is to separate the positive and negative electrodes and prevent electrons from freely passing through the battery, thus preventing short circuits to a certain extent. However, it allows ions in the electrolyte to pass freely between the positive and negative electrodes, forming a circuit between them. The positive and negative electrodes are collectively referred to as the electrodes. The positive and negative electrodes are collectively referred to as the tabs.

[0124] The outer shell refers to the housing structure with a space inside to accommodate and protect the electrode assembly. The outer shell can be made of a material with a certain degree of hardness and strength. This prevents deformation during compression and collision, giving the battery cells greater structural strength and improved reliability. The outer shell can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0125] The outer casing of a battery cell is equipped with electrode terminals. Electrode terminals are conductive components attached to the outer casing. They connect to the tabs of the electrode assembly to output power from the battery cell or charge the battery cell. A battery cell generally has two electrode terminals, one connected to the positive and negative tabs of the electrode assembly. The electrode terminal connected to the positive tab is the positive electrode terminal, and the electrode terminal connected to the negative tab is the negative electrode terminal. The electrode assembly and electrode terminals are connected to form a battery cell.

[0126] When a battery cell is charged, the current converts electrical energy into chemical energy through chemical reactions between the electrolyte and electrodes, which is stored in the cell. During discharge, the chemical energy is converted back into electrical energy and released. This energy conversion process is accompanied by energy loss and heat generation. If the heat cannot be effectively dissipated due to poor heat dissipation within the battery cell, the cell can overheat. Battery cells have a certain internal resistance, and when current flows through this resistance, it generates resistance losses, causing internal heat generation. When the current is too high or the internal resistance is too high, the internal heat generation intensifies, leading to overheating. If a battery cell exceeds its maximum design voltage during charging, or if the voltage drops too low during discharge, the cell can overvoltage or overdischarge. Overcharging or overdischarging can trigger runaway chemical reactions within the cell, generating excessive heat and causing overheating. Furthermore, defects in the battery cell design or manufacturing process, such as improper material selection or poor cell assembly, can lead to poor internal heat dissipation or uneven current distribution, increasing the risk of overheating or overvoltage. Therefore, the battery cells may overheat or overvoltage during charging or use.

[0127] Battery cells typically contain a certain amount of gas. When a battery cell is charged or discharged, the electrolyte solution undergoes gas generation or absorption reactions. The generation of these gases causes the gas pressure inside the battery cell to increase, causing the battery cell to swell and deform. During the charging or discharging process, the positive and negative electrode materials undergo chemical reactions to form new compounds. These chemical reactions are accompanied by volume changes, which cause the volume of the materials inside the battery cell to change, causing the battery to swell and deform. When a battery cell is overcharged or over-discharged, the chemical reactions inside the battery cell can become uncontrolled, generating excessive gas or causing structural damage to the electrode materials, which in turn causes the battery cell to swell and deform. Charging or discharging a battery cell in a high-temperature environment accelerates the internal chemical reactions, increasing gas generation and volume changes. High temperatures also cause the materials inside the battery cell to expand, also causing the battery cell to swell and deform.

[0128] To reduce the risk of explosion or fire caused by overheating or overpressure during charging or use, battery cell casings are often equipped with pressure relief mechanisms such as explosion-proof valves and explosion-proof discs. These release internal gas or liquid when the temperature or pressure of a battery cell exceeds a safety threshold, thereby reducing the pressure inside the cell and lowering the risk of explosion. This improves the safety of the battery cell and reduces potential safety risks.

[0129] In low-temperature environments, the chemical reaction rate of battery cells decreases, leading to a decrease in the discharge capacity and power output of the battery cells. This significantly reduces the battery life of electronic devices and affects the user experience. Especially for batteries made with the same battery cell type, since each cell has the same cold resistance, in low-temperature environments, the cells at the edge are more susceptible to the ambient temperature, resulting in a larger temperature difference within the battery, which affects the overall charge and discharge performance of the battery.

[0130] Based on the above considerations, in order to solve the problem that the overall charge and discharge performance of the battery is affected by the large temperature difference inside the battery in a low-temperature environment, an embodiment of the present application provides a battery. By using a second type of battery cell with a larger energy density for the battery cell that abuts the frame of the battery box, the charge and discharge performance of the battery cell close to the frame will not decrease too much in a low-temperature environment, thereby reducing the decline in the overall performance of the battery due to the temperature difference, thereby effectively improving the thermal insulation performance and charge and discharge performance of the battery at low temperatures and improving the temperature difference.

[0131] The battery cells disclosed in the embodiments of the present application can be used in electrical devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements, such as energy storage power supply systems for hydropower, thermal power, wind power, and solar power stations. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0132] For the convenience of description, an electric device is provided in accordance with an embodiment of the present application, and the electric device is described by taking a vehicle as an example.

[0133] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1001 is provided inside the vehicle 1000, and the battery 1001 can be provided at the bottom, head or tail of the vehicle 1000. The battery 1001 can be used to power the vehicle 1000. For example, the battery 1001 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a motor 1003. The controller 1002 is used to control the battery 1001 to power the motor 1003, for example, for starting, navigating and driving the vehicle 1000.

[0134] In some embodiments of the present application, the battery 1001 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0135] Please refer to Figures 2 to 11. Figure 2 is a schematic diagram of the decomposed structure of the battery 1001 provided in some embodiments of the present application. Figure 3 is a schematic diagram of the structure of the battery cell 100 provided in some embodiments of the present application. Figure 4 is a schematic diagram of the structure of the battery cell 100 provided in some embodiments of the present application distributed in the box. Figure 5 is a schematic diagram of the partial structure of the battery 1001 in Figure 2, wherein the cover 22 of the battery 1001 is not shown. Figure 6 is a schematic diagram of the partial structure of the battery 1001 in Figure 5, wherein the busbar 430 in Figure 5 is not shown. Figure 7 is an enlarged view of part A in Figure 6. Figure 8 is a schematic diagram of the structure of the first thermal management component 310 provided in some embodiments of the present application. Figure 9 is an enlarged view of part B in Figure 8. Figure 10 is a schematic diagram of the structure of the battery cell 100 provided in some embodiments of the present application distributed in the box 200. Figure 11 is a schematic diagram of the structure of the battery cell 100 provided in some embodiments of the present application distributed in the box 200.

[0136] Referring to Figure 2 , the battery 1001 has a height direction, a length direction X, and a width direction. In the figure, the Z direction represents the height direction of the battery 1001, the X direction represents the length direction of the battery 1001, and the Y direction represents the width direction of the battery 1001. The length of the battery 1001 can be longer or shorter than its width. The housing 200 defines the external structure of the battery 1001. The height direction of the housing 200 represents the height direction Z of the battery 1001, the length direction of the housing 200 represents the length direction X of the battery 1001, and the width direction of the housing 200 represents the width direction Y of the battery 1001.

[0137] Referring to Figure 3 , the battery cell 100 also has a height direction, a length direction, and a width direction. In the figure, the Z1 direction represents the height direction of the battery cell 100, the X1 direction represents the length direction of the battery cell 100, and the Y1 direction represents the width direction of the battery cell 100. The two end surfaces 11 of the battery cell 100 along its height direction Z1 are respectively a first end surface 111 and a second end surface 112. That is, the height of the battery cell 100 is defined between the first end surface 111 and the second end surface 112. The surface located on the side of the battery cell 100 in the height direction Z1 is the side surface 12 of the battery cell 100. The side surface 12 includes two first side surfaces 121 located at both ends of the battery cell 100 in the length direction X1 and two second side surfaces 122 located at both ends of the battery cell 100 in the width direction Y1. That is, the distance between the two first side surfaces 121 is the length of the battery cell 100, and the distance between the two second side surfaces 122 is the width of the battery cell 100. The areas of the two end surfaces 11 are defined by the length and width of the battery cell 100. The area of ​​the first side surface 121 is defined by the height and width of the battery cell 100. The area of ​​the second side surface 122 is defined by the height and length of the battery cell 100. For flat battery cells 100, such as square ones, the width is smaller than the length and height, and the area of ​​the second side surface 122 is the largest. Therefore, the second side surface 122 is also called the large side.

[0138] Please refer to Figures 2 to 4. According to some embodiments of the present application, the present application provides a battery 1001, including: a box body 200, including multiple frames 202 that constitute the side walls of the box body 200; multiple battery cells 100, installed in the box body 200; the multiple battery cells 100 include first-type battery cells 101 and second-type battery cells 102, and at least the battery cells 100 abutting the frames 202 use second-type battery cells 102, and the energy density of the second-type battery cells 102 is greater than the energy density of the first-type battery cells 101.

[0139] The box body 200 is a shell-like structure having a receiving space 201 . The battery 1001 and other components of the battery cell 100 are to be installed in the receiving space 201 of the box body 200 , so that the box body 200 supports and protects these components.

[0140] The battery cell 100 is a unit that increases electric energy in the battery 1001 .

[0141] The energy density of the battery cell 100 may be volumetric energy density or weight energy density. In an embodiment of the present application, the energy density of the second type of battery cell 102 is greater than the energy density of the first type of battery cell 101. In one example, the volumetric energy density E1 of the first type of battery cell 101 may be, for example, in the range of 200 watt-hours per liter (Wh / L) to 450 Wh / L, such as 200 Wh / L, 250 Wh / L, 300 Wh / L, 350 Wh / L, 400 Wh / L, 450 Wh / L, etc. In one example, the volumetric energy density E2 of the second type of battery cell 102 may be, for example, in the range of 450 Wh / L to 750 Wh / L, such as 450 Wh / L, 500 Wh / L, 550 Wh / L, 600 Wh / L, 620 Wh / L, 700 Wh / L, 750 Wh / L, etc. In one example, the gravimetric energy density G1 of the first type of battery cells 101 may be, for example, in the range of 100 watt-hours per kilogram (Wh / Kg) to 220 Wh / Kg, such as 100 Wh / Kg, 120 Wh / Kg, 140 Wh / Kg, 160 Wh / Kg, 180 Wh / Kg, 200 Wh / Kg, 220 Wh / Kg, etc. In one example, the gravimetric energy density G2 of the second type of battery cells 102 may be, for example, in the range of 220 Wh / Kg to 350 Wh / Kg, such as 220 Wh / Kg, 240 Wh / Kg, 260 Wh / Kg, 280 Wh / Kg, 300 Wh / Kg, 320 Wh / Kg, 350 Wh / Kg, etc. Generally, when the battery 1001 operates in a low-temperature environment, such as an ambient temperature of -20°C, the charge and discharge performance of the battery cell 100 with a high energy density is better than that of the battery cell 100 with a low energy density.

[0142] In a low-temperature environment, the heat of the battery cells 100 will dissipate from the housing 200. The heat of the battery cells 100 that abut the frame 202 is more easily absorbed by the frame 202. Therefore, the temperature of the area near the frame 202 will be relatively lower, which makes the battery cells 100 near the frame 202 more affected by the low-temperature environment. However, using the second type of battery cells 102 for the battery cells 100 abutting the frame 202 will increase the energy density of the battery cells 100 near the frame 202, making them less affected by the low-temperature environment. This can effectively improve the thermal insulation performance and charge-discharge performance of the battery 1001 at low temperatures, improve the temperature difference, and achieve a good balance between the cost and capacity of the battery 1001.

[0143] A low temperature environment refers to an environment in which the battery cell 100 operates at a relatively low temperature. For example, an environment below 5°C can be called a low temperature environment, and an environment below -30°C, -20°C, -10°C, -5°C, or 0°C can be called a low temperature environment.

[0144] In the technical solution of the embodiment of the present application, the battery cell 100 that abuts the frame 202 uses the second type of battery cell 102. Since the second type of battery cell 102 has a larger energy density, it can have better charging and discharging performance at low temperatures, and thus can effectively improve the thermal insulation performance and charging and discharging performance of the battery 1001 at low temperatures, and improve the temperature difference.

[0145] In one embodiment of the present application, the first type of battery cell 101 can be a sodium ion chemical system battery cell, which is also called a sodium ion battery cell. The positive electrode material of the sodium ion chemical system battery cell is a sodium-containing positive electrode active material, including at least one of a layered sodium-containing positive electrode active material, a spinel structured sodium-containing positive electrode active material, or an olivine structured sodium-containing positive electrode active material. Sodium ion chemical system battery cells include but are not limited to: Prussian blue derivatives / hard carbon system, polyanion type fast ion conductor sodium vanadium phosphate (or sodium vanadium fluorophosphate, sodium vanadium fluorooxyphosphate) / hard carbon system, transition metal oxide / hard carbon system and other battery cells. The sodium-containing positive electrode active material includes at least one of a sodium-containing transition metal oxide, a sodium-containing polyanion compound, or a sodium-containing Prussian blue material. The second type of battery cell 102 can be a lithium ion chemical system battery cell, which is also called a lithium ion battery cell. The positive electrode material of the lithium-ion chemical system battery cell is a lithium-containing positive electrode active material including at least one of a layered lithium-containing positive electrode active material, a spinel lithium-containing positive electrode active material, or an olivine lithium-containing positive electrode active material. It can be a battery cell using an olivine lithium-containing active material as the main positive electrode material (such as lithium iron phosphate, lithium iron manganese phosphate, etc.), a battery cell using a layered lithium-containing active material as the main positive electrode material (such as lithium cobalt oxide, lithium nickel oxide, lithium-rich materials, nickel-cobalt-manganese ternary materials, and manganese-cobalt-aluminum ternary materials, etc.). In another embodiment of the present application, the first type of battery cell 101 can be a battery cell using an olivine lithium-containing active material as the main positive electrode material (such as lithium iron phosphate, lithium iron manganese phosphate), and the second type of battery cell 102 can be a battery cell using a layered lithium-containing active material as the main positive electrode material (such as lithium cobalt oxide, lithium nickel oxide, lithium-rich materials, nickel-cobalt-manganese ternary materials, and manganese-cobalt-aluminum ternary materials, etc.).

[0146] In some embodiments, the positive electrode material of the first type of battery cell 101 includes a sodium-containing positive electrode active material, that is, the first type of battery cell 101 is a sodium ion chemical system battery cell, and the positive electrode material of the second type of battery cell 102 includes a lithium-containing positive electrode active material, that is, the second type of battery cell 102 is a lithium ion chemical system battery cell, so that the energy density of the first type of battery cell 101 used is less than the energy density of the second type of battery cell 102.

[0147] In some embodiments, the positive electrode material of the first type of battery cell 101 includes a lithium-containing positive electrode active material with an olivine structure, and the positive electrode material of the second type of battery cell 102 includes a lithium-containing positive electrode active material with a layered structure, so that the energy density of the first type of battery cell 101 used is less than the energy density of the second type of battery cell 102.

[0148] In some embodiments, the layered lithium-containing cathode active material includes at least one of lithium cobalt oxide, lithium nickel oxide, a lithium-rich material, a nickel-cobalt-manganese ternary material, and a manganese-cobalt-aluminum ternary material. The olivine-structured lithium-containing cathode active material includes at least one of lithium iron phosphate and lithium manganese iron phosphate.

[0149] In some embodiments, the first type of battery cell 101 is a sodium ion battery cell, and the second type of battery cell 102 is a lithium ion battery cell; or, the first type of battery cell 101 is a lithium iron phosphate battery cell, and the second type of battery cell 102 is a ternary battery cell; or, the first type of battery cell 101 is a liquid electrolyte battery cell, and the second type of battery cell 102 is a gel electrolyte battery cell or / and a solid-state battery cell; or, the first type of battery cell 101 is a gel electrolyte battery cell, and the second type of battery cell 102 is a solid-state battery cell.

[0150] It should be noted that the gel state refers to an elastic semi-solid state with a certain fixed structure and certain elasticity and deformability. Compared with the liquid state, the gel state has a lower degree of freedom, which can reduce the probability of movement between the electrode assembly and the inner wall of the housing.

[0151] A lithium-ion battery cell refers to a battery whose positive electrode active material contains lithium. The lithium-containing positive electrode active material includes at least one of a layered lithium-containing positive electrode active material, a spinel lithium-containing positive electrode active material, or an olivine lithium-containing positive electrode active material.

[0152] The layered structured lithium-containing positive electrode active material includes at least one of lithium cobaltate, lithium nickelate, lithium-rich material, nickel-cobalt-manganese ternary material and manganese-cobalt-aluminum ternary material.

[0153] The spinel-structured lithium-containing positive electrode active material includes lithium manganate.

[0154] The lithium-containing positive electrode active material with an olivine structure includes at least one of lithium iron phosphate and lithium manganese iron phosphate.

[0155] A lithium iron phosphate battery cell refers to a battery cell 100 in which the positive electrode active material of the electrode plate is lithium iron phosphate.

[0156] A ternary battery cell, also known as a ternary lithium battery cell, refers to a battery cell 100 in which the positive electrode active material of the electrode plate uses a lithium-containing ternary positive electrode active material. The lithium-containing ternary positive electrode active material includes at least one of lithium cobalt oxide, lithium nickel oxide, lithium-rich materials, nickel-cobalt-manganese ternary materials, and manganese-cobalt-aluminum ternary materials.

[0157] A sodium ion battery cell refers to a battery cell 100 that operates by the movement of sodium ions between a positive electrode and a negative electrode.

[0158] A liquid electrolyte battery cell refers to a battery cell 100 formed using a liquid electrolyte.

[0159] The gel-state battery cell refers to a battery cell 100 using a gel-state electrolyte.

[0160] A solid-state battery cell is a battery cell 100 that uses a solid electrode and a solid electrolyte.

[0161] Generally speaking, the energy density of lithium-ion battery cells is greater than that of sodium-ion battery cells. The energy density of ternary battery cells is greater than that of lithium iron phosphate battery cells. The energy density of solid-state battery cells is greater than that of gel electrolyte battery cells, which is greater than that of liquid electrolyte battery cells.

[0162] By selecting the above-mentioned first type battery cells 101 and second type battery cells 102, the energy density of the selected second type battery cells 102 can be better made greater than the energy density of the first type battery cells 101, thereby improving the overall thermal insulation performance, charge and discharge performance and energy density of the battery 1001 at low temperatures.

[0163] In some embodiments, the housing 200 may include a lower housing 21 and a cover plate 22. The lower housing 21 and the cover plate 22 overlap to define a storage space 201 for mounting components such as the battery cells 100 and the first thermal management component 310. The lower housing 21 may be a hollow structure with one end open, and the cover plate 22 may be a plate-like structure that overlaps the open side of the lower housing 21, thereby jointly defining the storage space 201. The lower housing 21 and the cover plate 22 may also each be a hollow structure with one end open, with the open side of the cover plate 22 overlapping the open side of the lower housing 21.

[0164] In some embodiments, the box 200 includes a plurality of frames 202, which are sequentially connected to form a side portion of the box 200, and each frame 202 forms a sidewall of the accommodating space 201 of the box 200. The plurality of frames 202 include a first frame 2021 and a second frame 2022. The first frame 2021 extends along the length direction X of the box 200, and the two first frames 2021 are located at both ends of the width direction Y of the box 200, and the length direction X of the first frame 2021 is consistent with the length direction X of the box 200. The second frame 2022 extends along the width direction Y of the box 200, and the two second frames 2022 are located at both ends of the length direction X of the box 200, and the length direction X of the second frame 2022 is consistent with the width direction Y of the box 200.

[0165] In some embodiments, when the box 200 includes a lower box 21 and a cover 22, and the cover 22 is a plate-shaped structure, the frame 202 is a side wall of the lower box 21. When the lower box 21 and the cover 22 are both hollow structures with one side open, the side wall of the lower box 21 and the corresponding side wall of the cover 22 together form the frame 202 on one side of the box 200.

[0166] Referring to Figure 12 , in some embodiments, a box 200 includes a plurality of frames 202 and two cover plates covering the ends of the frames 202. The cover plates are panels covering the ends of the frames 202. The frames 202 may constitute the side walls of the box 200, while the cover plates at the top of the box 200 constitute the cover plate 22 of the box 200, and the cover plates at the bottom of the box 200 constitute the bottom plate 25 of the box 200.

[0167] In some embodiments, the total capacity of the second type of battery cells 102 is less than the total capacity of the first type of battery cells 101 .

[0168] The capacity of a battery cell 100 refers to the amount of charge that the battery cell 100 can store, and is typically expressed in ampere-hours (Ah) or milliampere-hours (mAh). The greater the capacity, the greater the current that the battery cell 100 can provide and the longer the battery life.

[0169] The total capacity of the second type battery cells 102 refers to the sum of the capacities of all the second type battery cells 102 in the box 200 .

[0170] The total capacity of the first type battery cells 101 refers to the sum of the capacities of all the first type battery cells 101 in the box 200 .

[0171] By setting the total capacity of the second type battery cells 102 to be smaller, the first type battery cells 101 in the battery 1001 can be used as the main force for charging and discharging, thereby reducing costs.

[0172] In some embodiments, the number of the first type of battery cells 101 is greater than the number of the second type of battery cells 102 .

[0173] The number of the first type battery cells 101 is greater than the number of the second type battery cells 102 so that the total capacity of the first type battery cells 101 is set larger, thereby making the first type battery cells 101 the main force for charging and discharging the battery 1001 to reduce costs.

[0174] In some embodiments, the second type battery cell 102 is connected in series with the first type battery cell 101 , and the capacity of a single second type battery cell 102 is greater than the capacity of a single first type battery cell 101 .

[0175] The larger the capacity of a battery cell 100, the greater its charge and discharge current. Among the battery cells 100 connected in series, the battery cells 100 with smaller capacity also have smaller charge and discharge currents. Moreover, the battery cells 100 with smaller charge and discharge currents will become the bottleneck that limits the overall charge and discharge performance of these battery cells 100 connected in series. That is, the battery cells 100 with smaller capacity will affect the overall charge and discharge performance of the battery cells 100 connected in series. Since the first type of battery cells 101 in the housing 200 are the main force for charging and discharging the battery 1001, therefore, setting the capacity of a single second type of battery cell 102 greater than the capacity of a single first type of battery cell 101 can reduce the second type of battery cell 102 from becoming a bottleneck that limits the charge and discharge performance of the battery cells 100 connected in series, thereby improving the overall charge and discharge performance of the battery 1001.

[0176] In some embodiments, a thermal insulation layer 410 is provided between the second type battery cells 102 and the frame 202 .

[0177] The insulation layer 410 is a structure with heat insulation performance. The insulation layer 410 can be a plate or a coating provided on the frame 202. The insulation layer 410 can be made of aerogel insulation pads, ceramic insulation pads, epoxy resin boards and other structures.

[0178] Since the second-type battery cell 102 is in contact with the frame 202 and is closer to the frame 202, an insulation layer 410 is provided between the second-type battery cell 102 and the frame 202. In a low-temperature environment, the rate at which heat from the second-type battery cell 102 is conducted to the frame 202 can be better reduced, thereby improving the thermal insulation performance and charge and discharge performance of the battery 1001 at low temperatures.

[0179] In some embodiments, multiple battery cells 100 are arranged in rows along the length direction X of the box 200 and in the width direction Y of the box 200. The frame 202 includes a first frame 2021 arranged along the length direction X of the box 200 and a second frame 2022 arranged along the width direction Y of the box 200. At least one column of battery cells 100 adjacent to the first frame 2021 adopts the second type of battery cells 102, and / or at least one row of battery cells 100 adjacent to the second frame 2022 adopts the second type of battery cells 102.

[0180] The multiple battery cells 100 are arranged in a row along the length direction X of the box body 200 and in a row along the width direction Y of the box body 200, which means that the multiple battery cells 100 are arranged in a row along the length direction X of the box body 200 and the multiple battery cells 100 are arranged in a row along the width direction Y of the box body 200, so that the multiple battery cells 100 are arranged in an array to facilitate the installation and layout of the battery cells 100.

[0181] Since the battery cells 100 in a row are arranged sequentially along the longitudinal direction X of the casing 200, the at least one row of battery cells 100 adjacent to the first frame 2021 refers to the at least one row of battery cells 100 adjacent to the first frame 2021. In some embodiments, some battery cells 100 abut a second frame 2022 of the casing 200, and the at least one row of battery cells 100 adjacent to the second frame 2022 refers to the at least one row of battery cells 100 adjacent to the second frame 2022.

[0182] By using the second type of battery cells 102 for at least one column of battery cells 100 adjacent to the first frame 2021 and / or using the second type of battery cells 102 for at least one row of battery cells 100 adjacent to the second frame 2022, the thermal insulation performance and charge and discharge performance of the battery 1001 at low temperatures can be effectively improved, thereby improving the temperature difference.

[0183] In some embodiments, among the battery cells 100 abutting the first frame 2021, a column of battery cells 100 close to the frame 202 uses second-type battery cells 102, that is, a column of battery cells 100 close to the first frame 2021 uses second-type battery cells 102. In this way, the number of second-type battery cells 102 can be set to be smaller to reduce the overall cost of the battery 1001.

[0184] In some embodiments, among the battery cells 100 abutting the first frame 2021, the two columns of battery cells 100 near the first frame 2021 use the second type of battery cells 102, that is, the two columns of battery cells 100 near the first frame 2021 use the second type of battery cells 102, which can improve the thermal insulation performance and charge-discharge performance of the battery 1001 at low temperatures. It is understandable that among the battery cells 100 abutting the first frame 2021, three or four columns of battery cells 100 near the first frame 2021 can also use the second type of battery cells 102, which can improve the thermal insulation performance and charge-discharge performance of the battery 1001 at low temperatures.

[0185] In some embodiments, among the battery cells 100 abutting the second frame 2022 , a row of battery cells 100 close to the second frame 2022 uses second-type battery cells 102 . This allows the number of second-type battery cells 102 to be reduced, thereby reducing the overall cost of the battery 1001 .

[0186] In some embodiments, among the battery cells 100 abutting the second frame 2022, two rows of battery cells 100 near the second frame 2022 use second-type battery cells 102, which can improve the thermal insulation performance and charge-discharge performance of the battery 1001 at low temperatures. It is understood that among the battery cells 100 abutting the second frame 2022, three, four, or other rows of battery cells 100 near the second frame 2022 can also use second-type battery cells 102, which can improve the thermal insulation performance and charge-discharge performance of the battery 1001 at low temperatures.

[0187] In some embodiments, among the battery cells 100 abutting the frame 202, when the large surfaces (second side surfaces 122) of these battery cells 100 are parallel to the frame 202, one, two or three columns of battery cells 100 adjacent to the frame 202 may adopt second-type battery cells 102 to balance the cost of the battery 1001 with the thermal insulation performance and charge-discharge performance of the battery 1001 at low temperatures, so that the battery 1001 has good thermal insulation performance and charge-discharge performance at low temperatures and a lower price cost.

[0188] 4 , when the second-type battery cell 102 abuts against the frame 202 on opposite sides of the box 200, an insulation layer 410 is provided between the second-type battery cell 102 and the frame 202. For example, when the second-type battery cell 102 abuts against the first frame 2021, an insulation layer 410 is provided between the second-type battery cell 102 and the first frame 2021.

[0189] Referring to Figure 10 , when the second-type battery cell 102 abuts against the three adjacent side frames 202 of the housing 200, an insulation layer 410 is provided between the second-type battery cell 102 and the three adjacent side frames 202. For example, when the second-type battery cell 102 abuts against the first frame 2021, an insulation layer 410 is provided between the second-type battery cell 102 and the first frame 2021. When the second-type battery cell 102 abuts against the second frame 2022, an insulation layer 410 is also provided between the second-type battery cell 102 and the second frame 2022.

[0190] In some embodiments, when there are multiple (two or more) frames 202 abutting against the second type battery cells 102 , the thermal insulation layer 410 may be provided only between one of the frames 202 and the adjacent second type battery cells 102 .

[0191] In some embodiments, the insulation layer 410 has insulating properties.

[0192] The insulating property means that the thermal insulation layer 410 is a device made of insulating material.

[0193] The insulating layer 410 can provide buffering, insulation, and heat insulation, and can reduce the risk of short circuiting of the battery cells 100 when squeezed by the expansion of the battery cells 100. The insulating shield can be made of hard rubber pads, hard buffer foam materials, etc.

[0194] In some embodiments, a thermal management component is installed in the box 200 , and the thermal management component is thermally connected to the battery cell 100 .

[0195] Thermal connection refers to the connection between two objects through direct contact, or the use of thermal conductive structures such as thermal adhesives and thermal pads to connect the two objects, so that the heat of the higher temperature object can be transferred to the lower temperature object.

[0196] The thermal management component is thermally connected to the battery cell 100 , so that the thermal management component can control the temperature of the battery cell 100 .

[0197] A thermal management component is a device used to exchange heat with an object to which it is thermally connected in order to control the temperature of the object. A thermal management component can be a plate-like member, such as a liquid cooling plate, with internal flow channels that allow the circulation of coolants such as water and oil for heat exchange. A thermal management component can also be a device capable of heat exchange, such as a semiconductor cooling device. When a thermal management component has internal flow channels, if the temperature of the coolant passing through the flow channels is higher than the object to which the thermal management component is thermally connected, the thermal management component can heat the object. If the temperature of the coolant passing through the flow channels is lower than the object to which the thermal management component is thermally connected, the thermal management component can cool the object and dissipate heat.

[0198] A thermal management component is provided and thermally connected to the battery cell 100 to heat or cool the battery cell 100 through the thermal management component to provide a stable temperature environment for the battery cell 100, thereby facilitating stable charging and discharging of the battery cell 100.

[0199] The electrode terminals of the battery cells 100 in battery 1001 are welded to busbars 430, which can be conductive components such as copper or aluminum bars, to facilitate charging and discharging of the battery cells 100. If a battery cell 100 expands excessively, the connection between the electrode terminals and the outer casing may be damaged. The battery case 200 may also be damaged due to expansion, and the welds between the electrode terminals and busbars 430 may crack due to expansion, causing battery 1001 to fail. Therefore, during manufacturing, battery 1001 must effectively resist the expansion and deformation of the battery cells 100.

[0200] In some embodiments, each battery cell 100 has a first end face 111 at one end along the height direction Z1, and the first end face 111 is provided with an electrode terminal 13; the thermal management component includes a first thermal management component 310, and each first end face 111 is bonded and fixed to the first thermal management component 310 by a thermally conductive structural adhesive, and the first thermal management component 310 is provided with a first opening 311 exposing each electrode terminal 13.

[0201] The electrode terminal 13 is a conductive member on the battery cell 100 used to connect to an external circuit to output electrical energy or charge the battery cell 100 .

[0202] The first thermal management component 310 refers to a thermal management component provided on the side of the first end face 111 of the battery cell 100. For example, the first thermal management component 310 may have a flow channel inside, through which coolant such as water or oil can flow, so as to be a plate-shaped member for heat exchange, such as a liquid cooling plate. The first thermal management component 310 may also be a device capable of heat exchange, such as a semiconductor cooling device. When the first thermal management component 310 has a flow channel inside, if the temperature of the coolant passing through the flow channel of the first thermal management component 310 is higher than the object to which the first thermal management component 310 is thermally connected, the first thermal management component 310 may heat the object; and when the temperature of the coolant passing through the first thermal management component 310 is lower than the object to which the first thermal management component 310 is thermally connected, the first thermal management component 310 may cool the object and dissipate heat.

[0203] Thermally conductive structural adhesive refers to a structural adhesive with thermal conductivity. This adhesive is high-strength, can withstand heavy loads, and is resistant to aging, fatigue, and corrosion. It offers stable performance throughout its expected lifespan and is suitable for bonding high-stress structural components. The first end face 111 is bonded and fixed to the first thermal management component 310 via the thermally conductive structural adhesive, achieving a thermally conductive connection between the first thermal management component 310 and the first end face 111.

[0204] The first end face 111 and the first thermal management component 310 are bonded together by a thermally conductive structural adhesive, so that the first end face 111 and the first thermal management component 310 are firmly connected. Therefore, when the battery cell 100 expands and deforms, the first thermal management component 310 can restrain the first end face 111 to resist the expansion and deformation of the battery cell 100, thereby effectively reducing the risk of movement of the electrode terminal 13 on the first end face 111, thereby effectively protecting the electrode terminal 13.

[0205] The first end surface 111 of each battery cell 100 is bonded and fixed to the first thermal management component 310 , so that these battery cells 100 can be connected into a whole, thereby enhancing the overall structural strength of the battery 1001 and improving the overall safety of the battery 1001 .

[0206] The first opening 311 is a through-hole structure provided on the first thermal management component 310. When the first end surface 111 of the battery cell 100 is bonded and fixed to the first thermal management component 310, the electrode terminal 13 on the first end surface 111 is located in the first opening 311. The electrode terminal 13 is exposed through the first opening 311, allowing conductive components such as the busbar 430 to connect to the electrode terminal 13, thereby facilitating the charging and discharging of the battery cell 100.

[0207] In addition, by bonding and fixing the first end face 111 of the battery cell 100 to the first thermal management component 310, the distance between the first thermal management component 310 and the battery cell 100 can be reduced, so as to better utilize the space in the battery 1001, improve the utilization rate of the space, and thus improve the energy density of the battery 1001.

[0208] Moreover, since the first end face 111 of the battery cell 100 is bonded to the first thermal management component 310 by a heat-conducting structural adhesive, the battery cell 100 can be heated or cooled by the first thermal management component 310 to regulate the temperature of the battery cell 100, which not only provides a stable temperature environment for the battery cell 100, but also effectively reduces the risk of excessive expansion and deformation of the battery cell 100.

[0209] The first end face 111 of the battery cell 100 is bonded and fixed to the first thermal management component 310 by means of a thermally conductive structural adhesive, so that the first end face 111 of the battery cell 100 is fixed by the first thermal management component 310, and multiple battery cells 100 are connected into a whole, so as to improve the overall structural strength of the battery 1001, and effectively resist the expansion and deformation of the battery cell 100, thereby reducing the risk of failure of the battery cell 100 due to expansion and deformation; and the battery cell 100 can be heated or cooled by the first thermal management component 310, so that the temperature environment of the battery cell 100 is more stable; bonding and fixing the first thermal management component 310 to the first end face 111 can effectively save the height space in the battery 1001, which is beneficial to improving the energy density and volume utilization of the battery 1001.

[0210] Referring to FIG. 3 and FIG. 7 to FIG. 9 , in some embodiments, the battery 1001 further includes: a glue blocking structure 510 disposed around the edge of each first end surface 111 ; the glue blocking structure 510 is disposed between the battery cell 100 and the first thermal management component 310 .

[0211] The adhesive blocking structure 510 is a structure used to block the adhesive and limit its flow range. The adhesive blocking structure 510 is provided between the battery cell 100 and the first thermal management component 310 to limit the flow of the thermally conductive structural adhesive and effectively reduce overflow of the thermally conductive structural adhesive.

[0212] The blocking structure 510 is arranged around the edge of each first end surface 111, which means that the edge of the first end surface 111 is surrounded by the blocking structure 510, and a thermal conductive structural adhesive is arranged on the first end surface 111 to be bonded and fixed to the first thermal management component 310, and the blocking structure 510 can effectively prevent the thermal conductive structural adhesive from flowing to the side surface 12 of the battery cell 100.

[0213] If the thermally conductive structural adhesive flows to the side surfaces 12 of the battery cell 100, and the thermally conductive structural adhesive has a high strength after curing, this will limit the normal expansion and deformation of the battery cell 100 during charging and discharging, which in turn will affect the lifespan of the battery cell 100. Therefore, the adhesive blocking structure 510 surrounding the edge of the first end surface 111 of the battery cell 100 can effectively prevent the thermally conductive structural adhesive from flowing to the side surfaces 12 of the battery cell 100, thereby allowing the battery cell 100 to expand and deform normally during charging and discharging.

[0214] In some embodiments, the glue blocking structure 510 is further disposed around each first opening 311 .

[0215] The blocking structure 510 is arranged around each first opening 311, which means that the blocking structure 510 is arranged around the circumference of the first opening 311, and a thermal conductive structural glue is set on the first end surface 111 to be bonded and fixed to the first thermal management component 310, and the blocking structure 510 can effectively prevent the thermal conductive structural glue from flowing to the first opening 311.

[0216] If the thermally conductive structural adhesive enters the first opening 311 and solidifies, it may block the electrode terminal 13 from extending into the first opening 311, or may overflow onto the electrode terminal 13, thereby affecting the connection between the electrode terminal 13 and conductive parts such as the bus 430. Therefore, the adhesive blocking structure 510 is arranged around the first opening 311 to effectively block the thermally conductive structural adhesive from flowing to the first opening 311, so that the electrode terminal 13 can be well inserted into the first opening 311 and well connected to conductive parts such as the bus 430.

[0217] The adhesive blocking structure 510 surrounds each first opening 311 to prevent the thermal conductive adhesive from overflowing into the first opening 311 , thereby reducing the impact of the thermal conductive adhesive overflowing into the first opening 311 on the connection between the electrode terminal 13 and the bus bar 430 .

[0218] In some embodiments, the first end surface 111 is provided with a pressure relief mechanism 14 , the first thermal management component 310 is provided with exhaust mechanisms respectively opposite to the pressure relief mechanisms 14 , and the rubber blocking structure 510 is arranged around the exhaust mechanisms.

[0219] The pressure relief mechanism 14 is a mechanism provided on the battery cell 100 for dissipating pressure within the battery cell 100. The pressure relief mechanism 14 can be an explosion-proof valve, explosion-proof disc, or other structure provided on the battery cell 100. When the internal pressure of the battery cell 100 exceeds a set safety value, the pressure relief mechanism 14 opens to discharge gas or liquid within the battery cell 100, thereby reducing the internal pressure of the battery cell 100, lowering the risk of explosion, improving the safety performance of the battery cell 100, and mitigating potential safety risks.

[0220] The exhaust mechanism refers to a structure provided on the first thermal management component 310 that facilitates the passage of material discharged by the pressure relief mechanism 14. The exhaust mechanism can be an opening provided on the first thermal management component 310 or a weak area provided on the first thermal management component 310 that is easily damaged by material discharged by the pressure relief mechanism 14.

[0221] When the first end surface 111 of the battery cell 100 is bonded and fixed to the first thermal management component 310 , the pressure relief mechanism 14 on the first end surface 111 is located at a position corresponding to the exhaust mechanism, so that when the pressure relief mechanism 14 is opened, the gas or liquid inside the battery cell 100 can be discharged.

[0222] If the thermally conductive structural adhesive enters the exhaust mechanism and solidifies, it may block the opening of the pressure relief mechanism 14 and / or the exhaust mechanism, thereby affecting the safety of the battery cell 100. Therefore, the adhesive blocking structure 510 is arranged around the exhaust mechanism to effectively block the thermally conductive structural adhesive from flowing to the exhaust mechanism, thereby avoiding affecting the opening of the pressure relief mechanism 14 under certain circumstances.

[0223] A pressure relief mechanism 14 is provided on the first end surface 111 so that when the battery cell 100 expands excessively, the internal pressure of the battery cell 100 can be released to protect the battery cell 100; and an exhaust mechanism is provided on the first thermal management component 310 so that the pressure relief mechanism 14 can relieve pressure; the glue blocking structure 510 surrounds the exhaust mechanism to prevent the thermal conductive structural glue from overflowing to the exhaust mechanism, thereby reducing the risk of affecting the opening of the pressure relief mechanism 14 to relieve pressure.

[0224] In some embodiments, a pressure relief mechanism 14 may also be provided on the second end surface 112 of the battery cell 100 or on the side surface 12 of the battery cell 100 .

[0225] In some embodiments, the exhaust mechanism is a second opening 312 provided on the first thermal management component, and an insulating layer is provided on the inner wall of the second opening 312 .

[0226] The second opening 312 refers to a through-hole structure provided on the first thermal management component 310 .

[0227] The inner wall of the second opening 312 refers to the inner surface of the second opening 312 , and is also the inner surface of the side wall of the second opening 312 .

[0228] The insulating layer refers to a film layer with insulating properties and can be made by spraying an insulating material onto the inner wall of the second opening 312 or by laminating an insulating film material onto the inner wall of the second opening 312 .

[0229] When the first thermal management component 310 is made of metal, the inner wall of the second opening 312 is also conductive. This means that when the conductive parts such as the bus 430 are connected to the electrode terminal 13, the inner wall of the second opening 312 will actually shorten the conductive distance between the first thermal management component 310 and the conductive parts such as the bus 430, and the creepage distance between the first thermal management component 310 and the conductive parts such as the bus 430 needs to be set larger, thereby increasing the risk of short circuit; and providing an insulating layer on the inner wall of the second opening 312 can reduce the risk of affecting the creepage distance between the bus 430 and the battery cell 100.

[0230] Creepage distance is the shortest path between two conductive parts or between a conductive part and the protective interface of the equipment measured along the insulating surface.

[0231] The second opening 312 is used as the exhaust mechanism, which has a simple structure. An insulating layer is provided on the inner wall of the second opening 312 to reduce the risk of affecting the creepage distance between the busbar 430 and the battery cell 100 due to the conductivity of the inner wall of the second opening 312, thereby improving the safety of the battery 1001.

[0232] In some embodiments, the glue blocking structure 510 includes ribs 511 disposed on the first thermal management component 310 .

[0233] The rib 511 refers to a strip-like structure such as a rib or tendon protruding from an object.

[0234] Ribs 511 are provided on the first thermal management component 310 to form a rubber blocking structure 510, which is convenient for processing and manufacturing. When the first thermal management component 310 is connected to the first end face 111, the rubber blocking structure 510 can be located between the first thermal management component 310 and the first end face 111, which is convenient for assembly.

[0235] The rubber blocking structure 510 uses ribs 511, has a simple structure, and is easy to manufacture. When the first thermal management component 310 is connected to the first end surface 111, the rubber blocking structure 510 can be placed between the first thermal management component 310 and the first end surface 111, which is easy to assemble.

[0236] In some embodiments, the rubber stop structure 510 includes ribs 511 provided on the first end surface 111. In other words, the ribs 511 can also be provided on the first end surface 111 to form the rubber stop structure 510, which is also convenient for processing and manufacturing. Moreover, when the first thermal management component 310 is connected to the first end surface 111, the rubber stop structure 510 can be placed between the first thermal management component 310 and the first end surface 111, which facilitates assembly.

[0237] In some embodiments, ribs 511 may be provided on both the first thermal management component 310 and the first end surface 111 to form a glue blocking structure 510 .

[0238] In some embodiments, the ribs 511 may be manufactured separately and then fixed to the first thermal management component 310 , so as to simplify the structure of the first thermal management component 310 and facilitate the processing and manufacturing of the first thermal management component 310 .

[0239] In some embodiments, the ribs 511 may be integrally formed with the first thermal management component 310 , that is, a convex structure is provided on the first thermal management component 310 to form the ribs 511 , so as to facilitate the manufacture and assembly of the ribs 511 and the first thermal management component 310 .

[0240] In some embodiments, the rib 511 may be manufactured separately and then fixed to the first end surface 111 , so as to simplify the structure of the first end surface 111 of the battery cell 100 and facilitate the processing and manufacturing of the battery cell 100 .

[0241] In some embodiments, the rib 511 may be integrally formed with the first end surface 111 , that is, a convex structure is provided on the first end surface 111 to form the rib 511 so that the rib 511 is connected to the first end surface 111 .

[0242] In some embodiments, the rib 511 may be a sealing strip, and the sealing strip may be adhered to the first thermal management component 310 .

[0243] A sealing strip is a strip-shaped structure installed between two adjacent interfaces to seal the gap between the two interfaces. Sealing strips can be made of materials such as silicone, plastic, rubber, and metal.

[0244] The rib 511 is a sealing strip with a simple structure and easy production. The sealing strip is attached to the first thermal management component 310. When the first thermal management component 310 is connected to the first end surface 111, the rubber retaining structure 510 is positioned between the first thermal management component 310 and the first end surface 111, facilitating assembly.

[0245] In some embodiments, the rib 511 may be a sealing strip, and the sealing strip may be adhered to the first end surface 111 .

[0246] The rib 511 is a sealing strip with a simple structure and easy production. The sealing strip is attached to the first end surface 111. When the first thermal management component 310 is connected to the first end surface 111, the rubber retaining structure 510 can be placed between the first thermal management component 310 and the first end surface 111, facilitating assembly.

[0247] In some embodiments, sealing strips may be provided on both the first thermal management component 310 and the first end surface 111 to form a glue blocking structure 510 .

[0248] In some embodiments, an insulating layer is disposed on two opposite surfaces of the first thermal management component 310 and an inner wall of the first opening 311 .

[0249] The two opposite surfaces of the first heat-management component 310 refer to two surfaces at both ends of the first heat-management component 310 in the thickness direction.

[0250] The inner wall of the first opening 311 refers to the inner surface of the first opening 311 , and is also the inner surface of the side wall of the first opening 311 .

[0251] The insulating layer may be formed by spraying an insulating material onto the first thermal management component 310 , or by laminating an insulating film material onto the first thermal management component 310 .

[0252] Insulation layers are provided on both sides of the first thermal management component 310 and the inner wall of the first opening 311 to provide insulation protection and reduce the risk of short circuit of the battery cell 100 .

[0253] In some embodiments, the first thermal management component 310 may also be made of a material with certain strength, thermal conductivity, and insulation properties.

[0254] In some embodiments, the battery 1001 further includes a current bus 430 , and each electrode terminal 13 is connected to the current bus 430 through the corresponding first opening 311 .

[0255] The busbar 430 refers to a conductive member in the battery 1001 that is connected to the electrode terminal 13 of the battery cell 100. Multiple battery cells 100 are connected in series, parallel or mixed through the busbar 430, and the battery cells 100 discharge outward through the busbar 430, or the battery cells 100 are charged through the busbar 430.

[0256] The electrode terminal 13 is passed through the first opening 311 and connected to the busbar 430 to facilitate the conductive connection of the battery cell 100 and the charging and discharging of the battery cell 100 .

[0257] In some embodiments, the electrode terminal 13 may pass through the first opening 311 to be connected to a conductive member such as a bus bar 430 .

[0258] In some embodiments, the side of the electrode terminal 13 away from the first end surface 111 can extend out of the first opening 311, that is, the height of the electrode terminal 13 protruding from the first end surface 111 is greater than the depth of the first opening 311, so as to be connected to a conductive member such as the busbar 430.

[0259] Of course, in some embodiments, the side of the electrode terminal 13 away from the first end surface 111 can be flush with the end of the first opening 311 away from the first end surface 111, that is, the height of the electrode terminal 13 protruding from the first end surface 111 is equal to the depth of the first opening 311, so as to be connected to a conductive part such as the busbar 430.

[0260] In some other embodiments, the side of the electrode terminal 13 away from the first end face 111 can be located in the first opening 311, that is, the height of the electrode terminal 13 protruding from the first end face 111 is less than the depth of the first opening 311, which requires that conductive parts such as the busbar 430 extend into the first opening 311 and connect with the electrode terminal 13.

[0261] In some embodiments, the frame 202 includes first frames 2021 located at both ends of the box body 200 in the width direction Y. Each first frame 2021 extends along the length direction X of the box body 200. The length direction X of each battery cell 100 is parallel to the length direction X of the box body 200, and the battery cell 100 adjacent to the first frame 2021 abuts against the first frame 2021. A mounting beam is provided on each first frame 2021.

[0262] The length direction X1 of the battery cell 100 is parallel to the length direction X of the housing 200. The width direction Y1 of the battery cell 100 is parallel to the width direction Y of the housing 200. The width direction Y1 of the battery cell 100 is consistent with the width direction Y of the housing 200, and the length direction X1 of the battery cell 100 is consistent with the length direction X of the housing 200. The second side surfaces 122 of the battery cell 100 (i.e., the larger surfaces of the battery cell 100) are located on both sides of the length direction X1 of the battery cell 100. Therefore, the second side surfaces 122 of the battery cell 100 are parallel to the length direction X of the housing 200. Since the first frame 2021 extends along the length direction X of the housing 200, the second side surfaces 122 are arranged parallel to the first frame 2021.

[0263] The battery cell 100 adjacent to the first frame 2021 abuts against the first frame 2021 means that the battery cell 100 is installed in the box body 200, and the battery cell 100 located close to the first frame 2021 abuts against the first frame 2021, so that the battery cell 100 is positioned by the first frame 2021 so that the box body 200 stably supports the battery cell 100.

[0264] The mounting beam is a beam structure used to connect external devices and support the battery 1001. The mounting beam is provided to facilitate the installation and use of the battery 1001. The mounting beam is provided on the first frame 2021 to increase the overall structural strength of the battery 1001.

[0265] For flat or square battery cells 100, the main body of their electrode sheets is often stacked along the width direction Y1. Therefore, during charging and discharging, the battery cells 100 will experience significant expansion and deformation in the width direction Y1. This is because the battery cells 100 experience significant expansion and deformation in the width direction Y1, i.e., the side where the larger surface of the battery cells 100 (i.e., the second side surface 122) is located, will experience significant expansion and deformation. In the housing 200, the larger surface of the battery cells 100 is parallel to the first frame 2021. During charging and discharging, the first frame 2021 will bear the greater force of the battery cells 100's expansion and deformation. Providing mounting beams on the first frame 2021 can enhance the structural strength of the first frame 2021 to resist the expansion and deformation of the battery cells 100. Furthermore, the mounting beams can protect the battery cells 100 in the housing 200 from external impacts.

[0266] The length direction X1 of the battery cell 100 is parallel to the length direction X of the box body 200, and the first frame 2021 is made to abut the adjacent battery cell 100. The first frame 2021 is located at the end of the width direction Y of the box body 200, and the first frame 2021 abuts the large surface of the adjacent battery cell 100; and a mounting beam is set on the first frame 2021 to facilitate the installation and use of the battery 1001, and the mounting beam can provide a restraining force to resist the expansion and deformation of the battery cell 100.

[0267] In some embodiments, mounting beams may also be provided on other frames 202 of the box 200 , such as on the second frame 2022 , to connect to the electrical equipment to enhance the firmness of the battery 1001 when installed on the electrical equipment, so as to facilitate the use of the battery 1001 .

[0268] In some embodiments, the mounting beam can be an integral structure with the corresponding frame 202 of the box body 200, that is, the mounting beam and the corresponding frame 202 are integrally formed to facilitate processing and assembly. For example, in some embodiments, the mounting beam and the first frame 2021 are integrally formed.

[0269] In some embodiments, the mounting beam can also be manufactured separately and then fixedly connected to the corresponding frame 202 of the box body 200 by fasteners such as bolts.

[0270] In some embodiments, the mounting beam can also be manufactured separately and then fixedly connected to the corresponding frame 202 of the box body 200 by welding or other methods.

[0271] In some embodiments, multiple battery cells 100 are arranged in an array in the box 200 . For example, the multiple battery cells 100 can be defined as being arranged in rows along the width direction Y of the box 200 , and in columns along the length direction X of the box 200 .

[0272] The plurality of battery cells 100 are arranged in a row along the width direction Y of the housing 200 , which means that the plurality of battery cells 100 are arranged in a row, and the battery cells 100 in each row are sequentially arranged along the width direction Y of the housing 200 .

[0273] The plurality of battery cells 100 are arranged in a row along the longitudinal direction X of the housing 200 , which means that the plurality of battery cells 100 are arranged in a row, and the battery cells 100 in each row are sequentially arranged along the longitudinal direction X of the housing 200 .

[0274] Generally speaking, the length of the battery 1001 is often set to be greater than the width of the battery 1001. The width direction Y1 of the battery cell 100 is parallel to the width direction Y of the box 200. The number of battery cells 100 that are adapted to the width of the box 200 can be grasped at one time. The number of battery cells 100 to be grasped will be smaller, which is convenient for grasping.

[0275] The width direction Y1 of the battery cell 100 is parallel to the width direction Y of the box body 200 , which makes it easy to position the battery cell 100 and the box body 200 so as to install the battery cell 100 .

[0276] By aligning the width direction Y1 of the battery cells 100 and the width direction Y of the box body 200 in parallel, a number of battery cells 100 that match the width of the box body 200 can be grabbed at one time and assembled in the box body 200 , thereby improving assembly efficiency.

[0277] The battery cells 100 are arrayed in the box 200 to facilitate the layout and installation of the battery cells 100 .

[0278] In some embodiments, the battery cells 100 in the housing 200 may be arranged in only one row. For example, if each battery cell 100 is relatively long, the housing 200 may be provided with a single row of battery cells 100. Of course, the housing 200 may also be provided with multiple rows of battery cells 100, where the multiple rows of battery cells 100 are sequentially arranged along the longitudinal direction X of the housing 200, such as two adjacent rows of battery cells 100 being arranged along the longitudinal direction X of the housing 200. Multiple rows refers to two or more rows.

[0279] In some embodiments, the battery cells 100 in the housing 200 may be arranged in multiple columns, where the multiple columns of battery cells 100 are sequentially arranged along the width direction Y of the housing 200, for example, two adjacent columns of battery cells 100 are arranged along the length direction X of the housing 200. Multiple columns refers to two or more columns.

[0280] In some embodiments, when the electrical equipment using the battery 1001 is a vehicle, the vehicle includes a frame, the frame includes a crossbeam and a longitudinal beam, wherein the crossbeam is arranged along the left and right directions of the vehicle, and the longitudinal beam is arranged along the front and rear directions of the vehicle. The battery 1001 can be installed on the frame, and the large surface of the battery cell 100 can be parallel to the crossbeam of the vehicle, that is, the length direction X1 of the battery cell 100 in the battery 1001 is parallel to the crossbeam of the frame.

[0281] In some embodiments, when the electrical equipment using the battery 1001 is a vehicle, the vehicle includes a frame, and the frame includes a crossbeam and a longitudinal beam, wherein the crossbeam is arranged along the left and right directions of the vehicle, and the longitudinal beam is arranged along the front and rear directions of the vehicle. The battery 1001 can be installed on the frame, and the large surface of the battery cell 100 can be parallel to the longitudinal beam of the vehicle, that is, the length direction X1 of the battery cell 100 in the battery 1001 is parallel to the longitudinal beam of the frame.

[0282] In some embodiments, the battery 1001 further includes a battery management system 420 (BMS). The battery management system 420 is installed in the box 200 and is protected by the box 200 .

[0283] Battery management system 420 is a device used to monitor, control, and optimize battery 1001. It can monitor the status, capacity, and health of battery 1001 in real time to ensure safe operation and maximize the service life of battery 1001. Battery management system 420 can also optimize the performance and efficiency of battery 1001 and improve energy utilization through charging and discharging control.

[0284] In some embodiments, the battery management system 420 is disposed at one end of the box 200 in the length direction X to facilitate installation of the battery management system 420 .

[0285] In some embodiments, the housing 200 is provided with a receiving space 2012 for accommodating the battery management system 420 . The receiving space 2012 is a space divided in the housing 200 .

[0286] In some embodiments, a reinforcing beam 24 is further provided in the box body 200 to increase the structural strength of the box body 200 .

[0287] In some embodiments, a reinforcing beam 24 is provided in the housing 200. The reinforcing beam 24 is located at one end of the housing 200 in the length direction X. The reinforcing beam 24 divides the accommodating space 201 of the housing 200 into a receiving space 2012 and an installation space 2011. The battery cells 100 are installed in the installation space 2011, and the battery management system 420 is installed in the receiving space 2012. Separating the battery management system 420 from the battery cells 100 by the reinforcing beam 24 can reduce the mutual influence between the battery management system 420 and the battery cells 100, improve safety, and facilitate the stable operation of the battery management system 420 and the battery cells 100.

[0288] Referring to FIG. 2 and FIG. 3 , in some embodiments, the battery cell 100 has a first end surface 111 and a second end surface 112 at both ends along the height direction Z1 , respectively. The second end surface 112 is bonded to the box body 200 .

[0289] The first end surface 111 and the second end surface 112 are respectively two end surfaces 11 of the battery cell 100 in the height direction Z1 .

[0290] The second end surface 112 is bonded to the box body 200 to fix the battery cell 100 so that the box body 200 can stably support the battery cell 100 .

[0291] In some embodiments, the second end surface 112 is fixedly connected to the box body 200 by structural adhesive.

[0292] Structural adhesives refer to adhesives that have high strength, can withstand large loads, are resistant to aging, fatigue, and corrosion, and have stable performance within their expected service life. They are suitable for bonding structural parts that bear strong forces.

[0293] The second end face 112 of the battery cell 100 is fixedly connected to the box body 200 by structural adhesive, and multiple battery cells 100 can be connected into one body to improve the overall structural strength of the battery 1001, effectively resist the expansion and deformation of the battery cell 100, reduce the risk of failure of the battery cell 100 due to expansion and deformation, and improve the overall structural strength of the battery 1001.

[0294] Please refer to Figures 12 to 14. Figure 12 is a schematic diagram of the exploded structure of the battery 1001 provided in some embodiments of the present application. Figure 13 is a schematic diagram of the structure of the second thermal management component 320 in some embodiments of the present application. Figure 14 is an enlarged view of section C in Figure 13.

[0295] In some embodiments, the battery cell 100 has a second end surface 112 at one end along the height direction, and the thermal management component includes a second thermal management component 320 . The second thermal management component 320 is disposed in the box 200 , and each second end surface 112 is connected to the second thermal management component 320 .

[0296] The second thermal management component 320 refers to a thermal management component provided on the side of the second end face 112 of the battery cell 100. For example, the second thermal management component 320 may have a flow channel inside, through which coolant such as water or oil can flow, so as to be a plate-shaped component for heat exchange, such as a liquid cooling plate. The second thermal management component 320 may also be a device capable of heat exchange, such as a semiconductor cooling device. When the second thermal management component 320 has a flow channel inside, if the temperature of the coolant passing through the flow channel of the second thermal management component 320 is higher than the object to which the second thermal management component 320 is thermally connected, the second thermal management component 320 may heat the object; and when the temperature of the coolant passing through the second thermal management component 320 is lower than the object to which the second thermal management component 320 is thermally connected, the second thermal management component 320 may cool the object and dissipate heat.

[0297] Each second end face 112 is connected to the second thermal management component 320, which means that the second end face 112 of each battery cell 100 is connected to the second thermal management component 320, so that the battery cell 100 is supported by the second thermal management component 320, and a thermal conductive connection between the second end face 112 and the second thermal management component 320 can be achieved.

[0298] A second thermal management component 320 is provided and connected to the second end surface 112 , so as to heat or cool the battery cell 100 through the second thermal management component 320 , thereby stabilizing the temperature environment of the battery cell 100 .

[0299] In some embodiments, each second end surface 112 is bonded and fixed to the second thermal management component 320 by using a thermally conductive structural adhesive.

[0300] The second end surface 112 refers to a surface of the battery cell 100 that is away from the first end surface 111 along the height direction Z1.

[0301] The second end face 112 of each battery cell 100 is bonded and fixed to the second thermal management component 320 by a thermally conductive structural adhesive to connect multiple battery cells 100 into one, resist expansion and deformation of the battery cell 100, reduce the risk of failure of the battery cell 100 due to expansion and deformation, and improve the overall structural strength of the battery 1001.

[0302] In some embodiments, the battery 1001 further includes: a glue blocking structure 520 disposed around the edge of each second end surface 112 for blocking the thermally conductive structural glue on the second end surface 112 from flowing between adjacent battery cells 100 .

[0303] The adhesive blocking structure 520 is a structure used to block the adhesive and limit its flow. Disposing the adhesive blocking structure 520 between the second end face 112 of the battery cell 100 and the second thermal management component 320 can limit the flow of the thermally conductive adhesive, effectively reducing overflow of the thermally conductive adhesive.

[0304] The glue blocking structure 520 surrounds the edge of each second end surface 112, which means that the edge of the second end surface 112 is surrounded by the glue blocking structure 520, and a thermal conductive structural glue is set on the second end surface 112 to be bonded and fixed to the second thermal management component 320, and the glue blocking structure 520 can effectively prevent the thermal conductive structural glue from flowing to the side surface 12 of the battery cell 100.

[0305] If the thermally conductive structural adhesive flows to the side surfaces 12 of the battery cell 100 and solidifies, its strength will be relatively high, which will limit the normal expansion and deformation of the battery cell 100 during charging and discharging, thereby shortening the lifespan of the battery cell 100. Therefore, the adhesive blocking structure 520 surrounding the edge of the second end surface 112 of the battery cell 100 can effectively prevent the thermally conductive structural adhesive from flowing to the side surfaces 12 of the battery cell 100, thereby allowing the battery cell 100 to expand and deform normally during charging and discharging.

[0306] The adhesive blocking structure 520 is provided so as to surround the edge of each second end surface 112 , thereby preventing the thermally conductive structural adhesive from overflowing to the side surface 12 of the battery cell 100 , thereby reducing the risk of the normal charging and discharging expansion and deformation of the battery cell 100 due to the presence of solidified thermally conductive structural adhesive between adjacent battery cells 100 , thereby reducing the risk of shortening the life of the battery cell 100 .

[0307] In some embodiments, the glue blocking structure 520 includes ribs 521 disposed on the second thermal management component 320 .

[0308] The ribs 521 refer to strip-like structures such as tendons and ribs that protrude from an object.

[0309] Ribs 521 are provided on the second thermal management component 320 to form a glue-blocking structure 520 , which facilitates processing and manufacturing. When the second thermal management component 320 is connected to the second end face 112 , the glue-blocking structure 520 can be located between the second thermal management component 320 and the second end face 112 , facilitating assembly.

[0310] In some embodiments, the glue blocking structure 520 includes ribs 521 disposed on the second end surface 112. In other words, the ribs 521 can also be disposed on the second end surface 112 to form the glue blocking structure 520, which is also convenient for processing and manufacturing. Moreover, when the second thermal management component 320 is connected to the second end surface 112, the glue blocking structure 520 can be positioned between the second thermal management component 320 and the second end surface 112, facilitating assembly.

[0311] In some embodiments, ribs 521 may be provided on both the second thermal management component 320 and the second end surface 112 to form a glue-blocking structure 520 .

[0312] In some embodiments, the ribs 521 may be manufactured separately and then fixed to the second thermal management component 320 to simplify the structure of the second thermal management component 320 and facilitate the processing and manufacturing of the second thermal management component 320 .

[0313] In some embodiments, the rib 521 can be integrally formed with the second thermal management component 320 , that is, a convex structure is provided on the second thermal management component 320 to form the rib 521 , so as to facilitate the manufacture and assembly of the rib 521 and the second thermal management component 320 .

[0314] In some embodiments, the ribs 521 may be manufactured separately and then fixed to the second end surface 112 , so as to simplify the structure of the second end surface 112 of the battery cell 100 and facilitate the processing and manufacturing of the battery cell 100 .

[0315] In some embodiments, the rib 521 may be integrally formed with the second end surface 112 , that is, a convex strip structure is provided on the second end surface 112 to form the rib 521 so that the rib 521 is connected to the second end surface 112 .

[0316] In some embodiments, the rib 521 may be a separator, and the separator may be adhered to the second thermal management component 320 .

[0317] A separator is a strip-shaped structure placed between two adjacent interfaces to seal the gap between them. Separators can be made of silicone, plastic, rubber, metal, and other materials.

[0318] The ribs 521 are constructed using spacers, which are simple in structure and easy to manufacture. The spacers are attached to the second thermal management component 320. When the second thermal management component 320 is connected to the second end face 112, the adhesive blocking structure 520 is positioned between the second thermal management component 320 and the second end face 112, facilitating assembly.

[0319] In some embodiments, the rib 521 may be a separator bar, and the separator bar is adhered to the second end surface 112 .

[0320] The ribs 521 are made of spacers, which are simple in structure and easy to manufacture. The spacers are attached to the second end surface 112. When the second thermal management component 320 is connected to the second end surface 112, the adhesive blocking structure 520 is positioned between the second thermal management component 320 and the second end surface 112, facilitating assembly.

[0321] In some embodiments, separation strips may be provided on both the second thermal management component 320 and the second end surface 112 to form a glue blocking structure 520 .

[0322] In some embodiments, the second thermal management component 320 can be formed as part of the housing 200, and the second end surface 112 is bonded and fixed to the second thermal management component 320 via a thermally conductive structural adhesive. In this case, the second end surface 112 is also fixedly connected to the housing 200 via the thermally conductive structural adhesive. In some embodiments, when the second thermal management component 320 is formed as part of the housing 200, the adhesive blocking structure 520 between the second thermal management component 320 and the second end surface 112 is actually provided between the housing 200 and the second end surface 112.

[0323] In some embodiments, when the second thermal management component 320 is not provided in the box body 200, the second end surface 112 of the battery cell 100 can be connected to the box body 200 to stably support the battery cell 100, and the box body 200 can provide a restraining force to the battery cell 100 to resist the expansion and deformation of the battery cell 100.

[0324] In some embodiments, the second end face 112 of the battery cell 100 is bonded to the housing 200 using structural adhesive, while the first end face 111 of the battery cell 100 is bonded to the first thermal management component 310 using thermally conductive structural adhesive. The second end face 112 is bonded to the housing 200, while the first end face 111 is bonded to the first thermal management component 310. This secures both end faces 11 of the battery cell 100 in the height direction Z1, providing more stable support for the battery cell 100. This also allows multiple battery cells 100 to be better connected and integrated, effectively resisting expansion and deformation of the battery cells 100, reducing the risk of failure of the battery cells 100 due to expansion and deformation, and improving the overall structural strength of the battery 1001.

[0325] In some embodiments, the second end face 112 is fixedly connected to the box body 200 by structural adhesive. The battery 1001 also includes: an adhesive blocking structure 520, which is arranged around the edge of each second end face 112 to prevent the structural adhesive on the second end face 112 from flowing between adjacent battery cells 100.

[0326] The second end surface 112 is fixedly connected to the box body 200 by structural adhesive, so that the second end surface 112 and the box body 200 are firmly connected. Therefore, when the battery cell 100 expands and deforms, the box body 200 can restrain the second end surface 112 to resist the expansion and deformation of the battery cell 100.

[0327] The adhesive blocking structure 520 is a structure used to block the adhesive and limit its flow range. Disposing the adhesive blocking structure 520 between the second end surface 112 of the battery cell 100 and the housing 200 can limit the flow of the thermally conductive adhesive, effectively reducing overflow of the thermally conductive adhesive.

[0328] The glue blocking structure 520 surrounds the edge of each second end surface 112, which means that the edge of the second end surface 112 is surrounded by the glue blocking structure 520, and a thermal conductive structural glue is set on the second end surface 112 to be bonded and fixed to the box body 200, and the glue blocking structure 520 can effectively prevent the thermal conductive structural glue from flowing to the side surface 12 of the battery cell 100.

[0329] If the thermally conductive structural adhesive flows to the side surfaces 12 of the battery cell 100 and solidifies, its strength will be relatively high, which will limit the normal expansion and deformation of the battery cell 100 during charging and discharging, thereby shortening the lifespan of the battery cell 100. Therefore, the adhesive blocking structure 520 surrounding the edge of the second end surface 112 of the battery cell 100 can effectively prevent the thermally conductive structural adhesive from flowing to the side surfaces 12 of the battery cell 100, thereby allowing the battery cell 100 to expand and deform normally during charging and discharging.

[0330] The adhesive blocking structure 520 is provided so as to surround the edge of each second end surface 112 , thereby preventing the structural adhesive from overflowing to the side surface 12 of the battery cell 100 , thereby reducing the risk of the existence of solidified structural adhesive between adjacent battery cells 100 affecting the normal charging and discharging expansion and deformation of the battery cells 100 , thereby reducing the risk of reducing the life of the battery cells 100 .

[0331] In some embodiments, the glue-blocking structure 520 includes ribs 521 disposed on the box body 200 .

[0332] The ribs 521 refer to strip-like structures such as tendons and ribs that protrude from an object.

[0333] Ribs 521 are provided on the box body 200 to form a glue blocking structure 520 , which is convenient for processing and manufacturing. When the box body 200 is connected to the second end surface 112 , the glue blocking structure 520 can be located between the box body 200 and the second end surface 112 , which is convenient for assembly.

[0334] In some embodiments, the adhesive blocking structure 520 includes ribs 521 disposed on the second end surface 112. In other words, the ribs 521 can also be disposed on the second end surface 112 to form the adhesive blocking structure 520, which is also convenient for processing and manufacturing. When the box body 200 and the second end surface 112 are connected, the adhesive blocking structure 520 can be positioned between the box body 200 and the second end surface 112, facilitating assembly.

[0335] In some embodiments, ribs 521 may be provided on both the box body 200 and the second end surface 112 to form a glue-blocking structure 520 .

[0336] In some embodiments, the ribs 521 may be manufactured separately and then fixed to the box body 200 , so as to simplify the structure of the box body 200 and facilitate the processing and manufacturing of the box body 200 .

[0337] In some embodiments, the ribs 521 may be integrally formed with the box body 200 , that is, a convex strip structure is provided on the box body 200 to form the ribs 521 , so as to facilitate the manufacture and assembly of the ribs 521 and the box body 200 .

[0338] In some embodiments, the ribs 521 may be manufactured separately and then fixed to the second end surface 112 , so as to simplify the structure of the second end surface 112 of the battery cell 100 and facilitate the processing and manufacturing of the battery cell 100 .

[0339] In some embodiments, the rib 521 may be integrally formed with the second end surface 112 , that is, a convex strip structure is provided on the second end surface 112 to form the rib 521 so that the rib 521 is connected to the second end surface 112 .

[0340] In some embodiments, the rib 521 may be a separator, which is adhered to the box 200 .

[0341] A separator is a strip-shaped structure placed between two adjacent interfaces to seal the gap between them. Separators can be made of silicone, plastic, rubber, metal, and other materials.

[0342] The ribs 521 use a separator, which has a simple structure and is easy to manufacture. The separator is attached to the box body 200. When the box body 200 is connected to the second end face 112, the glue blocking structure 520 is located between the box body 200 and the second end face 112, which facilitates assembly.

[0343] In some embodiments, the rib 521 may be a separator bar, and the separator bar is adhered to the second end surface 112 .

[0344] The rib 521 uses a separator, which has a simple structure and is easy to manufacture. The separator is attached to the second end surface 112. When the box body 200 and the second end surface 112 are connected, the glue blocking structure 520 can be located between the box body 200 and the second end surface 112, which facilitates assembly.

[0345] In some embodiments, separation strips may be provided on both the box body 200 and the second end surface 112 to form a glue-blocking structure 520 .

[0346] In some embodiments, the battery cell 100 is installed in the lower box body 21 , and the second end surface 112 is bonded and fixed to the bottom of the lower box body 21 .

[0347] In some embodiments, the second end surface 112 may also be bonded and fixed to the cover plate 22 .

[0348] In some embodiments, the battery 1001 further includes a bottom plate 25 , which is mounted on the bottom of the box body 200 . The bottom plate 25 protects the box body 200 and can also provide a certain buffering effect when the box body 200 is impacted.

[0349] Please refer to Figure 15, which is a schematic diagram of the exploded structure of a battery 1001 provided in some embodiments of the present application. In some embodiments, the thermal management component includes a first thermal management component 310 and a second thermal management component 320. The first end face 111 of the battery cell 100 is bonded to the first thermal management component 310 using a thermally conductive structural adhesive, and the second thermal management component 320 is connected to the second end face 112. The first thermal management component 310 and the second thermal management component 320 are used to heat or cool the battery cell 100, thereby making the temperature environment of the battery cell 100 more stable, especially providing a more stable temperature environment for the battery cell 100 to achieve high-rate fast charging of 4C or above.

[0350] In some embodiments, as shown in FIG. 15 , the thermal management component includes a first thermal management component 310 and a second thermal management component 320. The first end surface 111 of the battery cell 100 is bonded to the first thermal management component 310 using a thermally conductive adhesive, while the second end surface 112 is also bonded to the second thermal management component 320 using the thermally conductive adhesive. The thermally conductive adhesive secures the second end surface 112 to the second thermal management component 320, ensuring a secure connection between the second end surface 112 and the second thermal management component 320. When the battery cell 100 expands and deforms, the second thermal management component 320 can restrain the second end surface 112, thereby resisting the expansion and deformation of the battery cell 100. The fact that the first end surface 111 of each battery cell 100 is bonded to the first thermal management component 310 allows the second thermal management component 320 and the first thermal management component 310 to cooperate to more effectively resist expansion and deformation of the battery cell 100, reducing the risk of failure of the battery cell 100 due to expansion and deformation, and enhancing the overall structural strength of the battery 1001.

[0351] Please refer to Figures 18 to 28. Figure 18 is a schematic diagram of the exploded structure of the battery 1001 in some embodiments of the present application. Figure 19 is a schematic diagram of the exploded structure of the battery 1001 in other embodiments of the present application. Figure 20 is a schematic diagram of the structure of the third thermal management component provided in some embodiments of the present application. Figure 21 is an enlarged view of part E in Figure 20. Figure 22 is a schematic diagram of a partial structure of the battery 1001 provided in some embodiments of the present application. Figure 23 is an enlarged view of part F in Figure 22. Figure 24 is a schematic diagram of the exploded structure of the battery 1001 in other embodiments of the present application. Figure 25 is a schematic diagram of the partial structure of the battery 1001 in Figure 24. Figure 26 is an enlarged view of part G in Figure 25. Figure 27 is a schematic diagram of the exploded structure of the battery 1001 in some other embodiments of the present application. Figure 28 is a schematic diagram of the exploded structure of the battery 1001 in some other embodiments of the present application.

[0352] In some embodiments, multiple battery cells 100 are arranged in an array; the thermal management component includes a third thermal management component 330 for being adapted to be configured between two adjacent columns or two adjacent rows of battery cells 100, the battery cell 100 includes multiple surfaces, and the third thermal management component 330 is connected to the surface with the largest area among the multiple surfaces of the battery cell 100 for heat exchange.

[0353] The third thermal management component 330 refers to a thermal management component located on the side of the battery cell 100. For example, the third thermal management component 330 may have an internal flow channel to circulate coolant such as water or oil, thereby being a plate-shaped component used for heat exchange, such as a liquid cooling plate. The third thermal management component 330 may also be a device capable of heat exchange, such as a semiconductor cooling device. When the third thermal management component 330 has an internal flow channel, if the temperature of the coolant passing through the flow channel of the third thermal management component 330 is higher than the object to which the third thermal management component 330 is thermally connected, the third thermal management component 330 may heat the object. If the temperature of the coolant passing through the flow channel of the third thermal management component 330 is lower than the object to which the third thermal management component 330 is thermally connected, the third thermal management component 330 may cool the object and dissipate heat.

[0354] The third thermal management component 330 is heat-exchange connected to the largest surface of the battery cell 100 , and the third thermal management component 330 can control the temperature of the battery cell 100 through the largest surface of the battery cell 100 .

[0355] The multiple battery cells 100 are arranged in an array, which can be arranged in rows along the width direction Y of the housing 200, and in columns along the length direction X of the housing 200. Of course, the multiple battery cells 100 can also be arranged in an array, which can be arranged in columns along the width direction Y of the housing 200, and in rows along the length direction X of the housing 200.

[0356] When the battery cells 100 in each column are arranged sequentially along the longitudinal direction X of the housing 200, and the longitudinal direction X1 of the battery cells 100 is consistent with the longitudinal direction X of the housing 200, and the large surface (second side surface 122) of the battery cells 100 is parallel to the longitudinal direction X of the housing 200, a third thermal management component 330 is provided between two adjacent columns of battery cells 100 so that the third thermal management component 330 is connected to the large surface of the battery cells 100 for heat exchange, thereby facilitating heat dissipation from the battery cells 100.

[0357] When the rows of battery cells 100 are arranged sequentially along the longitudinal direction X of the housing 200, and the longitudinal direction X1 of the battery cells 100 is consistent with the longitudinal direction X of the housing 200, the large surface (second side surface 122) of the battery cells 100 is parallel to the longitudinal direction X of the housing 200. Then, a third thermal management component 330 is provided between two adjacent rows of battery cells 100 so that the third thermal management component 330 is connected to the large surface of the battery cells 100 for heat exchange, thereby facilitating heat dissipation of the battery cells 100.

[0358] The large surface of the battery cell 100 refers to the surface with the largest area on the battery cell 100 .

[0359] In some embodiments, the battery cells 100 are arranged in an array, and a third thermal management component 330 needs to be disposed on the side of the battery cell 100 where the larger surface is located. That is, the third thermal management component 330 can be disposed based on the arrangement of the battery cells 100. For example, if the largest surface area of ​​a battery cell 100 is located between two adjacent columns of battery cells 100, then the third thermal management component 330 is disposed between the two adjacent columns of battery cells 100, so that the third thermal management component 330 is in heat exchange connection with the largest surface area of ​​the battery cell 100. If the largest surface area of ​​a battery cell 100 is located between two adjacent rows of battery cells 100, then the third thermal management component 330 is disposed between the two adjacent rows of battery cells 100, so that the third thermal management component 330 is in heat exchange connection with the largest surface area of ​​the battery cell 100.

[0360] A third thermal management component 330 is provided between two adjacent columns or rows of battery cells 100, and the battery cells 100 can be heated or dissipated through the third thermal management component 330; the third thermal management component 330 is connected to the surface with the largest area among the multiple surfaces of the battery cell 100 through heat exchange, so that the third thermal management component 330 can be connected to the large surface of the battery cell 100 through thermal conduction, thereby increasing the thermal conduction connection area between the third thermal management component 330 and the battery cell 100, so as to heat or dissipate heat for more efficiently.

[0361] Referring to FIG. 18 , in some embodiments, a third thermal management component 330 is disposed between any two adjacent columns or any two adjacent rows of battery cells 100 .

[0362] A third thermal management component 330 is set between any two adjacent columns or any two adjacent rows of battery cells 100. Then, among the battery cells 100 in the array, the two columns or two rows of battery cells 100 at the ends are thermally connected to one third thermal management component 330 respectively, and the battery cells 100 in the remaining columns or rows are thermally connected to two third thermal management components 330 respectively. In this way, the thermal connection area between the battery cells 100 and the third thermal management component 330 in the box 200 can be larger, so as to better regulate the temperature of the battery cells 100, and the battery cells 100 can be heated or cooled by the first thermal management component 310 and the third thermal management component 330, so that the temperature environment of the battery cells 100 is more stable, especially for the battery cells 100 to achieve high-rate fast charging of 4C or above, providing a more stable temperature environment.

[0363] Referring to FIG. 19 to FIG. 22 , in some embodiments, a third thermal management component 330 is disposed on one side of each column of battery cells 100 , and two adjacent third thermal management components 330 are spaced apart by two columns of battery cells 100 .

[0364] Providing the third thermal management component 330 on one side of each column of battery cells 100 means that the third thermal management component 330 is provided on only one side of a column of battery cells 100 .

[0365] If two adjacent third thermal management components 330 are spaced apart by two columns of battery cells 100 , then one third thermal management component 330 is disposed every two columns of battery cells 100 .

[0366] A third thermal management component 330 is provided on one side of each column of battery cells 100, and each column of battery cells 100 is thermally connected to a third thermal management component 330, so that the temperature of each battery cell 100 can be controlled by the third thermal management component 330, and the battery cell 100 can be heated or cooled by the first thermal management component 310 and the third thermal management component 330, so that the temperature environment of the battery cell 100 is more stable, especially for the battery cell 100 to achieve 4C and above high-rate fast charging, providing a more stable temperature environment.

[0367] In some embodiments, a third thermal management component 330 is disposed on one side of each row of battery cells 100 , and two adjacent third thermal management components 330 are spaced apart by two rows of battery cells 100 .

[0368] Providing the third thermal management component 330 on one side of each row of battery cells 100 means that the third thermal management component 330 is provided on only one side of a column of battery cells 100 .

[0369] If two adjacent third thermal management components 330 are spaced apart by two rows of battery cells 100 , then one third thermal management component 330 is disposed every two rows of battery cells 100 .

[0370] A third thermal management component 330 is provided on one side of each row of battery cells 100, and each row of battery cells 100 is thermally connected to a third thermal management component 330, so that the temperature of each battery cell 100 can be controlled by the third thermal management component 330, and the battery cell 100 can be heated or cooled by the first thermal management component 310 and the third thermal management component 330, so that the temperature environment of the battery cell 100 is more stable, especially for the battery cell 100 to achieve 4C and above high-rate fast charging, providing a more stable temperature environment.

[0371] In some embodiments, the battery 1001 further includes a distribution pipe 631 connected to one end of the flow channel of each third thermal management component 330 and a return pipe 632 connected to the other end of the flow channel of each third thermal management component 330 .

[0372] The flow distribution pipe 631 is a pipe used to distribute the coolant to the flow channels of each third thermal management component 330. The flow distribution pipe 631 is connected to each third thermal management component 330.

[0373] The return pipe 632 is a pipe for returning the coolant in the flow channel of each third thermal management component 330 . The return pipe 632 is in communication with each third thermal management component 330 .

[0374] A distribution pipe 631 and a return pipe 632 are provided to respectively connect the two ends of the flow channel of the third thermal management component 330 to facilitate the supply of coolant to each third thermal management component 330 .

[0375] In some embodiments, the end of the distribution pipe 631 away from the third thermal management component 330 can extend out of the housing 200 to connect to an external coolant supply system. The end of the return pipe 632 away from the third thermal management component 330 can extend out of the housing 200 to connect to an external coolant return system.

[0376] In some embodiments, the distribution pipe 631 and the return pipe 632 are located at the same end of the third thermal management component 330 .

[0377] A distribution pipe 631 and a return pipe 632 are provided at the same end of the third heat management component 330 , so that the distribution pipe 631 and the return pipe 632 can be led out to connect to an external coolant supply system.

[0378] 20 to 23 , in some embodiments, the third thermal management component 330 has two sets of flow channels. A current collecting member 331 is provided at one end of the third thermal management component 330 , and the current collecting member 331 connects the two sets of flow channels.

[0379] The current collecting member 331 is a structural member having a channel therein for connecting the two groups of flow channels in the third thermal management component 330 , thereby forming a loop between the two groups of flow channels in the third thermal management component 330 .

[0380] Two groups of flow channels are provided in the third thermal management component 330 , and a current collecting member 331 is provided to connect the two groups of flow channels, so as to facilitate the processing and manufacturing of the third thermal management component 330 and reduce the difficulty of additive manufacturing of the third thermal management component 330 .

[0381] In some embodiments, a reinforcing beam 24 is provided in the box body 200, and a third thermal management component 330 is provided in the box body 200. The reinforcing beam 24 is extended along a length direction perpendicular to the third thermal management component 330. A receiving groove 241 for accommodating the current collecting part 331 is provided on the reinforcing beam 24, and the current collecting part 331 is placed in the corresponding receiving groove 241.

[0382] The reinforcement beam 24 refers to a beam structure provided in the box body 200 to increase the structural strength of the box body 200 .

[0383] The accommodating groove 241 refers to a groove structure provided on the reinforcing beam 24 .

[0384] When installing the third thermal management component 330, the current collecting part 331 is located at one end of the third thermal management component 330 close to the reinforcing beam 24, and a receiving groove 241 is provided on the reinforcing beam 24. The current collecting part 331 of the third thermal management component 330 can be placed in the corresponding receiving groove 241, which can reduce the distance between the reinforcing beam 24 and the battery cell 100, improve the space utilization in the box 200, improve the overall integration of the battery 1001, and improve the energy density.

[0385] A reinforcing beam 24 is provided in the box body 200 to increase the structural strength of the battery 1001; and a receiving groove 241 is provided on the reinforcing beam 24, and the current collecting member 331 of the third thermal management component 330 is placed in the corresponding receiving groove 241, which can reduce the distance between the reinforcing beam 24 and the battery cell 100, improve the space utilization rate in the box body 200, improve the overall integration of the battery 1001, and improve the energy density.

[0386] Please refer to Figures 16 and 17. Figure 16 is a schematic diagram of the exploded structure of a battery 1001 provided in some embodiments of the present application. Figure 17 is an enlarged view of section D in Figure 16. Please also refer to Figures 22, 24 to 28.

[0387] In some embodiments, a liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The liquid inlet pipe 611 is connected to one end of the flow channel in the thermal management component, and the liquid outlet pipe 612 is connected to the other end of the flow channel in the thermal management component.

[0388] The liquid inlet pipe 611 is a pipe used to connect to an external liquid supply system for coolant to enter. The liquid outlet pipe 612 is a pipe used to connect to an external liquid supply system so that the coolant therein can flow back to the external liquid supply system.

[0389] The liquid inlet pipe 611 is connected to one end of the flow channel in the thermal management component, and the liquid outlet pipe 612 is connected to the other end of the flow channel in the thermal management component, so that the coolant can enter the thermal management component from the liquid inlet pipe 611 and flow out from the liquid outlet pipe 612 after heat exchange in the thermal management component.

[0390] A liquid inlet pipe 611 and a liquid outlet pipe 612 are provided to connect to an external coolant supply system so that the coolant flows through the thermal management component and then exchanges heat with the thermal management component to heat or cool the battery cell 100 .

[0391] In some embodiments, the thermal management component includes a first extension portion 620 , which extends from one end of the housing 200 in the height direction to the outside of the housing 200 , and the liquid inlet pipe 611 and the liquid outlet pipe 612 are installed on the first extension portion 620 .

[0392] The first extension 620 is a portion of the structure extending outward from the corresponding thermal management component. It contains at least two spaced-apart flow channels. The inlet pipe 611 and the outlet pipe 612 are mounted on the first extension 620. The flow channels connected to the inlet pipe 611 and the outlet pipe 612 are spaced apart from each other, preventing coolant from flowing through the first extension 620.

[0393] The box body 200 includes a plurality of frames 202 and two sealing plates covering both ends of the frames 202. The frames 202 can constitute the side walls of the box body 200, the sealing plates at the top of the box body 200 constitute the cover plate 22 of the box body 200, and the sealing plates at the bottom of the box body 200 constitute the bottom plate 25 of the box body 200.

[0394] The first extension portion 620 extends from one end of the box body 200 in the height direction to the outside of the box body 200, which means that the first extension portion 620 extends from the box body 200 between the frame 202 of the box body 200 and the corresponding sealing plate. This structure not only facilitates the first extension portion 620 to extend out of the box body 200 and facilitates assembly, but also eliminates the need to set an opening or window structure on the frame 202 of the box body 200, thereby facilitating the processing and manufacturing of the frame 202 and avoiding reducing the structural strength of the box body 200 to a certain extent.

[0395] A first extension portion 620 is provided on the thermal management component, and the liquid inlet pipe 611 and the liquid outlet pipe 612 are installed on the first extension portion 620 so as to support the liquid inlet pipe 611 and the liquid outlet pipe 612 through the first extension portion 620, and the first extension portion 620 extends from one end in the height direction of the box body 200 to the outside of the box body 200. There is no need to provide an opening structure in the box body 200, so that the first extension portion 620 can be conveniently placed outside the box body 200, and then the liquid inlet pipe 611 and the liquid outlet pipe 612 are led out of the box body, so as to facilitate the connection of the liquid inlet pipe 611 and the liquid outlet pipe 612 to the external cooling liquid supply system.

[0396] In some embodiments, the box body 200 includes a sealing plate located at the end of its height direction Z. The sealing plate is located at one end of the box body 200 close to the first extension portion 620. The sealing plate extends outward to have a second extension portion 221. The first extension portion 620 is sealed and connected to the second extension portion 221.

[0397] The second extension portion 221 refers to a portion of the sealing plate that protrudes and extends outward.

[0398] The first extension portion 620 is sealedly connected to the second extension portion 221 , so that the first extension portion 620 is supported and protected by the second extension portion 221 , thereby facilitating the sealing of the box body 200 .

[0399] The second extension portion 221 is provided on the sealing plate of the box body 200 , which not only supports the first extension portion 620 but also protects the first extension portion 620 and facilitates the sealing connection of the box body 200 .

[0400] In some embodiments, the first extension portion 620 may be provided on the first thermal management component 310 , the second thermal management component 320 , or both.

[0401] In some embodiments, when the first extension portion 620 is located at the top of the box body 200 , the sealing plate may be the cover plate 22 of the box body 200 .

[0402] Please refer to FIG. 27 . In some embodiments, when the first extension portion 620 is located at the bottom of the box body 200 , the sealing plate may be the bottom plate 25 of the box body 200 .

[0403] In some embodiments, the first extension portion 620 and the first thermal management component 310 are an integral structure.

[0404] The first extension portion 620 and the first thermal management component 310 are integrally formed, which facilitates communication between the flow channel in the first extension portion 620 and the flow channel in the first thermal management component 310 .

[0405] Providing the first extension portion 620 and the first heat management component 310 as an integrated structure is not only convenient for processing and manufacturing, but also convenient for assembly.

[0406] In some embodiments, the first extension portion 620 may also be manufactured separately and then fixed to the box body 200 or the first thermal management component 310 .

[0407] In some embodiments, the first extension portion 620 and the second thermal management component 320 are an integral structure.

[0408] The first extension portion 620 and the second thermal management component 320 are an integral structure, which means that the first extension portion 620 and the second thermal management component 320 are integrally formed, so that the flow channel in the first extension portion 620 can be connected with the flow channel in the second thermal management component 320.

[0409] Providing the first extension portion 620 and the second heat management component 320 as an integrated structure is not only convenient for processing and manufacturing, but also convenient for assembly.

[0410] In some embodiments, the thermal management component includes a first thermal management component 310, and a liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The liquid inlet pipe 611 is connected to one end of the flow channel in the first thermal management component 310, and the liquid outlet pipe 612 is connected to the other end of the flow channel in the first thermal management component 310.

[0411] In some embodiments, the thermal management component includes a second thermal management component 320, and a liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The liquid inlet pipe 611 is connected to one end of the flow channel in the second thermal management component 320, and the liquid outlet pipe 612 is connected to the other end of the flow channel in the second thermal management component 320.

[0412] In some embodiments, the thermal management component includes a third thermal management component 330, and a liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The liquid inlet pipe 611 is connected to one end of the flow channel in the third thermal management component 330, and the liquid outlet pipe 612 is connected to the other end of the flow channel in the third thermal management component 330.

[0413] In some embodiments, the thermal management component includes a third thermal management component 330, and a liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The battery 1001 also includes a distribution pipe 631 connecting one end of the flow channel of each third thermal management component 330 and a return pipe 632 connecting the other end of the flow channel of each third thermal management component 330. The liquid inlet pipe 611 is connected to the distribution pipe 631, and the liquid outlet pipe 612 is connected to the return pipe 632.

[0414] In some embodiments, the thermal management component includes a first thermal management component 310 and a second thermal management component 320, and a liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The liquid inlet pipe 611 is simultaneously connected to one end of the flow channel in the first thermal management component 310 and one end of the flow channel in the second thermal management component 320; the liquid outlet pipe 612 is simultaneously connected to the other end of the flow channel in the first thermal management component 310 and the other end of the flow channel in the second thermal management component 320, so as to supply cooling liquid to the first thermal management component 310 and the second thermal management component 320, and the number of pipes can be reduced, thereby improving the integration.

[0415] In some embodiments, the first thermal management component 310 and the second thermal management component 320 can also be supplied with cooling liquid through different liquid inlet pipes 611 and liquid outlet pipes 612 respectively, that is, a group of liquid inlet pipes 611 and liquid outlet pipes 612 can be set to connect with the first thermal management component 310, and another group of liquid inlet pipes 611 and liquid outlet pipes 612 can be set to connect with the second thermal management component 320.

[0416] In some embodiments, the first thermal management component 310 and the second thermal management component 320 are connected in parallel via a pipe, and the first extension portion 620 is connected to the first thermal management component 310, and further connected to the second thermal management component 320. The first thermal management component 310 and the second thermal management component 320 being connected in parallel via a pipe means that one end of the flow channel of the first thermal management component 310 is connected to one end of the flow channel of the second thermal management component 320, and the other end of the flow channel of the first thermal management component 310 is connected to the other end of the flow channel of the second thermal management component 320.

[0417] Please refer to Figures 24 and 25. In some embodiments, the thermal management component includes a first thermal management component 310 and a third thermal management component 330. A liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The battery 1001 also includes a distribution pipe 631 connecting one end of the flow channel of each third thermal management component 330 and a return pipe 632 connecting the other end of the flow channel of each third thermal management component 330. The liquid inlet pipe 611 is simultaneously connected to one end of the flow channel in the first thermal management component 310 and the distribution pipe 631; the liquid outlet pipe 612 is simultaneously connected to the other end of the flow channel in the first thermal management component 310 and the return pipe 632, so as to supply cooling liquid to the first thermal management component 310 and the second thermal management component 320, and the number of pipes can be reduced, thereby improving the integration.

[0418] In some embodiments, the first thermal management component 310 and the third thermal management component 330 can also be supplied with cooling liquid through different liquid inlet pipes 611 and liquid outlet pipes 612 respectively, that is, a group of liquid inlet pipes 611 and liquid outlet pipes 612 can be set to connect with the first thermal management component 310, and another group of liquid inlet pipes 611 and liquid outlet pipes 612 can be set to connect with the third thermal management component 330.

[0419] In some embodiments, the first thermal management component 310 and the third thermal management component 330 are connected in parallel via a pipe, and the first extension portion 620 is connected to the first thermal management component 310, and further connected to the third thermal management component 330. The first thermal management component 310 and the third thermal management component 330 being connected in parallel via a pipe means that one end of the flow channel of the first thermal management component 310 is connected to one end of the flow channel of the third thermal management component 330, and the other end of the flow channel of the first thermal management component 310 is connected to the other end of the flow channel of the third thermal management component 330.

[0420] Please refer to Figure 27. In some embodiments, the thermal management component includes a second thermal management component 320 and a third thermal management component 330. A liquid inlet pipe 611 and a liquid outlet pipe 612 are installed on the box body 200. The battery 1001 also includes a distribution pipe 631 connecting one end of the flow channel of each third thermal management component 330 and a return pipe 632 connecting the other end of the flow channel of each third thermal management component 330. The liquid inlet pipe 611 is simultaneously connected to one end of the flow channel in the second thermal management component 320 and the distribution pipe 631; the liquid outlet pipe 612 is simultaneously connected to the other end of the flow channel in the second thermal management component 320 and the return pipe 632, so as to supply coolant to the second thermal management component 320 and the second thermal management component 320, and the number of pipes can be reduced, thereby improving the integration.

[0421] In some embodiments, the second thermal management component 320 and the third thermal management component 330 can also be supplied with cooling liquid through different liquid inlet pipes 611 and liquid outlet pipes 612 respectively, that is, a group of liquid inlet pipes 611 and liquid outlet pipes 612 can be set to connect with the second thermal management component 320, and another group of liquid inlet pipes 611 and liquid outlet pipes 612 can be set to connect with the third thermal management component 330.

[0422] In some embodiments, the second thermal management component 320 and the third thermal management component 330 are connected in parallel via a pipe, and the first extension portion 620 is connected to the second thermal management component 320, and further connected to the third thermal management component 330. The second thermal management component 320 and the third thermal management component 330 being connected in parallel via a pipe means that one end of the flow channel of the second thermal management component 320 is connected to one end of the flow channel of the third thermal management component 330, and the other end of the flow channel of the second thermal management component 320 is connected to the other end of the flow channel of the third thermal management component 330.

[0423] Please refer to Figure 28. In some embodiments, the thermal management component includes a first thermal management component 310, a second thermal management component 320 and a third thermal management component 330. The temperature of the battery cell 100 can be adjusted simultaneously by the first thermal management component 310, the second thermal management component 320 and the third thermal management component 330 to provide a more stable temperature environment for the battery cell 100, thereby facilitating stable charging and discharging of the battery cell 100.

[0424] Please refer to Figure 28, which is a schematic diagram of the exploded structure of a battery 1001 provided in some embodiments of the present application. In some embodiments, when the thermal management component of the battery 1001 includes a first thermal management component 310, a second thermal management component 320, and multiple third thermal management components 330, the second thermal management component 320 is connected in parallel with the first thermal management component 310 via a pipe. The liquid inlet pipe 611 is connected to the first thermal management component 310 and the distribution pipe 631 at the same time, and the liquid outlet pipe 612 is connected to the first thermal management component 310 and the return pipe 632 at the same time. In this way, the first thermal management component 310, the second thermal management component 320 and multiple third thermal management components 330 are all arranged in parallel, and the cooling liquid is supplied to the first thermal management component 310, the second thermal management component 320 and each third thermal management component 330 through a liquid inlet pipe 611, and the cooling liquid is returned to the first thermal management component 310, the second thermal management component 320 and each third thermal management component 330 through a liquid outlet pipe 612, so as to reduce the use of pipes and improve the integration.

[0425] According to some embodiments of the present application, the present application provides a battery 1001, a housing 200, and a plurality of battery cells 100. The housing 200 includes a plurality of frames 202 forming side walls of the housing 200. The plurality of battery cells 100 are installed in the housing 200. The plurality of battery cells 100 include first-type battery cells 101 and second-type battery cells 102. At least the battery cells 100 abutting the frames 202 are second-type battery cells 102, and the energy density of the second-type battery cells 102 is greater than the energy density of the first-type battery cells 101. The number of first-type battery cells 101 is greater than the number of second-type battery cells 102. The second-type battery cells 102 are connected in series with the first-type battery cells 101, and the capacity of the second-type battery cells 102 is greater than the capacity of the first-type battery cells 101. By using the second type of battery cells 102 for the battery cells 100 that are in contact with the frame 202, the energy density of the battery cells 100 close to the frame 202 is increased, and the battery cells 100 are less affected by the low temperature environment, thereby effectively improving the thermal insulation performance and charge and discharge performance of the battery 1001 at low temperatures, improving the temperature difference, and also balancing the cost and capacity of the battery 1001. Since the number of the first type of battery cells 101 in the box 200 is greater than the number of the second type of battery cells 102, the first type of battery cells 101 are the main force for charging and discharging the battery 1001. Therefore, by setting the capacity of the second type of battery cells 102 to be greater than the capacity of the first type of battery cells 101, the second type of battery cells 102 can be reduced from becoming a bottleneck that limits the charge and discharge performance of the battery cells 100 connected in series, thereby improving the overall charge and discharge performance of the battery 1001.

[0426] According to some embodiments of the present application, the present application also provides an electrical device, comprising the battery described in any of the above solutions.

[0427] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0428] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that, Comprising: A box body, including a plurality of frames constituting the side walls of the box body; A plurality of battery cells, installed in the box body; The plurality of battery cells include a first type of battery cell and a second type of battery cell. At least the battery cells in contact with the frame adopt the second type of battery cell, and the energy density of the second type of battery cell is greater than that of the first type of battery cell.

2. The battery according to claim 1, characterized in that, The total capacity of the second type of battery cell is less than the total capacity of the first type of battery cell.

3. The battery according to claim 2, characterized in that, The number of the first type of battery cells is greater than the number of the second type of battery cells.

4. The battery according to claim 2, wherein The second type of battery cell is connected in series with the first type of battery cell, and the capacity of a single second type of battery cell is greater than the capacity of a single first type of battery cell.

5. The battery according to any one of claims 1-4, characterized in that, A heat insulation layer is provided between the second type of battery cell and the frame.

6. The battery according to any one of claims 1-5, characterized in that, The plurality of battery cells are arranged in columns along the length direction of the box body and in rows along the width direction of the box body; the frame includes a first frame arranged along the length direction of the box body and a second frame arranged along the width direction of the box body. At least one column of the battery cells adjacent to the first frame adopts the second type of battery cell, and / or at least one row of the battery cells adjacent to the second frame adopts the second type of battery cell.

7. The battery according to any one of claims 1-6, characterized in that, A thermal management component is installed in the box body, and the thermal management component is thermally connected to the battery cells.

8. The battery according to claim 7, wherein, One end of each battery cell in the height direction has a first end face, and an electrode terminal is provided on the first end face; the thermal management component includes a first thermal management component. Each first end face is bonded and fixed to the first thermal management component through a thermally conductive structural adhesive, and a first opening exposing each electrode terminal is formed on the first thermal management component.

9. The battery according to claim 8, characterized in that, The battery further includes: A glue-blocking structure, arranged around the edge of each first end face; The glue-blocking structure is arranged between the battery cell and the first thermal management component.

10. The battery according to claim 9, characterized in that, The glue-blocking structure also surrounds each first opening.

11. The battery according to claim 9 or 10, characterized in that, A pressure relief mechanism is provided on the first end face, an exhaust mechanism opposite to the pressure relief mechanism is formed on the first thermal management component, and the glue-blocking structure surrounds each exhaust mechanism.

12. The battery according to claim 11, wherein, The exhaust mechanism is a second opening formed on the first thermal management component, and an insulating layer is provided on the inner wall of the second opening.

13. The battery according to any one of claims 9-12, characterized in that, The glue-blocking structure includes ribs arranged on the first thermal management component and / or the first end face.

14. The battery according to any one of claims 8 - 13, characterized in that, Insulating layers are provided on the opposite two surfaces of the first thermal management component and the inner wall of the first opening.

15. The battery according to any one of claims 7-14, characterized in that, One end of the battery cell in the height direction has a second end face, the thermal management component includes a second thermal management component, the second thermal management component is arranged in the box body, and each second end face is connected to the second thermal management component.

16. The battery according to claim 15, characterized in that, Each second end face is bonded and fixed to the second thermal management component through a thermally conductive structural adhesive.

17. The battery according to any one of claims 7-16, characterized in that, The plurality of battery cells are arranged in an array layout, the thermal management component includes a third thermal management component adapted to be arranged between adjacent two columns or adjacent two rows of the battery cells, the battery cell includes a plurality of surfaces, and the third thermal management component is heat exchange connected to the surface with the largest area among the plurality of surfaces.

18. The battery according to claim 17, wherein, The third heat management component is provided between any two adjacent columns or any two adjacent rows of the battery cells; Alternatively, the third heat management component is provided on one side of each column of the battery cells, and there are two columns of battery cells spaced between two adjacent third heat management components Alternatively, the third heat management component is provided on one side of each row of the battery cells, and there are two rows of battery cells spaced between two adjacent third heat management components.

19. The battery according to claim 17 or 18, characterized in that, The battery further includes a distribution pipe connecting one end of the flow channels of each of the third heat management components and a return pipe connecting the other ends of the flow channels of each of the third heat management components.

20. The battery according to claim 19, wherein, The distribution pipe and the return pipe are located at the same end of the third heat management component.

21. The battery according to claim 20, characterized in that, The third heat management component has two sets of flow channels, and a manifold is provided at one end of the third heat management component, and the manifold communicates with the two sets of flow channels.

22. The battery according to claim 21, characterized in that, A reinforcing beam is provided in the box body, the reinforcing beam extends along a direction perpendicular to the length direction of the third heat management component, and a receiving groove for receiving the manifold is provided on the reinforcing beam, and the manifold is placed in the corresponding receiving groove.

23. The battery according to any one of claims 7-22, characterized in that, An inlet pipe and an outlet pipe are installed on the box body, the inlet pipe communicates with one end of the flow channel in the heat management component, and the outlet pipe communicates with the other end of the flow channel in the heat management component.

24. The battery according to claim 23, characterized in that, The heat management component further includes a first extension portion, the first extension portion extends out of the box body from one end in the height direction of the box body, and the inlet pipe and the outlet pipe are installed on the first extension portion.

25. The battery according to claim 24, wherein, The box body includes a sealing plate at the end in its height direction, the sealing plate is located at one end of the box body close to the first extension portion, the sealing plate extends outward with a second extension portion, and the first extension portion is hermetically connected to the second extension portion.

26. The battery according to any one of claims 1-25, characterized in that, The frame includes first frames at both ends in the width direction of the box body, each first frame extends along the length direction of the box body, the length direction of each battery cell is parallel to the length direction of the box body, and the battery cells adjacent to the first frame abut against the first frame; Mounting beams are provided on each of the first frames.

27. The battery according to any one of claims 1-26, characterized in that, The first type of battery cell is a sodium ion battery cell, and the second type of battery cell is a lithium ion battery cell; alternatively, the first type of battery cell is a lithium iron phosphate battery cell, and the second type of battery cell is a ternary battery cell.

28. An electrical device, characterized in that, Including the battery according to any one of claims 1-27.

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