Battery and power consuming device having the same

Abstract

The battery (200) and the power consumption device (1000) include the battery (200), which includes at least two first battery cells (10), each of which has a plurality of side walls (11), the plurality of side walls (11) including a first side wall (111), which is the side wall of the first battery cell with the largest area, the first side walls (111) of the at least two first battery cells (10) being arranged opposite each other in a first direction and offset from each other in a second direction, the first direction and the second direction being perpendicular to each other, and the first direction being perpendicular to the first side wall (111).

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application is filed based on and claims priority from a Chinese patent application having application number 202310511048.8 and filing date May 8, 2023, the entire contents of which are hereby incorporated by reference into this application.

[0002] Technical Field TECHNICAL FIELD This application relates to the field of battery technology, and more particularly to batteries and power-consuming devices having the same. [Background technology]

[0003] In recent years, new energy vehicles have developed dramatically, and in the field of electric vehicles, batteries play an irreplaceable and important role as a power source for electric vehicles. Generally, a battery includes multiple battery cells, and when a battery cell experiences thermal runaway, the heat transferred from the battery cell to the remaining single battery cell is relatively large, which is likely to cause thermal runaway in adjacent battery cells and lead to thermal diffusion between battery cells within the battery. Summary of the Invention

[0004] The present application provides a battery capable of suppressing heat diffusion in the battery and improving the reliability of use of the battery, and a power consumption device having the same.

[0005] According to a first aspect, an embodiment of the present application provides a battery, the battery including at least two first battery cells, each of which has a plurality of side walls, the plurality of side walls including a first side wall, the first side wall being the side wall of the first battery cell with the largest area, the first side walls of the at least two first battery cells being arranged opposite each other in a first direction and offset from each other in a second direction, the first direction and the second direction being perpendicular to each other, and the first direction being perpendicular to the first side wall.

[0006] In the above technical solution, by arranging at least two first battery cells in a staggered manner, it is advantageous to fully utilize the battery arrangement space and improve the adaptability of multiple first battery cells to arrangement spaces of different shapes. At the same time, the two first battery cells arranged in a staggered manner can reduce the amount of heat transferred from one of the first battery cells to the other opposite first battery cell, so that when a first battery cell experiences thermal runaway, the heat transferred from the thermally runaway first battery cell to the adjacent first battery cell can be reduced, reducing the probability of the adjacent first battery cell experiencing thermal runaway and further achieving the purpose of suppressing heat diffusion, which is advantageous to improving the reliability of battery use.

[0007] In some embodiments, at least two of the offset first side walls are thermally conductively connected.

[0008] In the above technical solution, by thermally conductively connecting at least two first side walls that are offset from each other, it is advantageous to appropriately improve the heat transfer efficiency between the two first battery cells that are offset from each other, thereby more quickly dissipating the heat inside the battery and advantageous to the thermal management control of the battery.

[0009] In some embodiments, a thermally conductive adhesive layer is provided between at least two offset first side walls.

[0010] In the above technical solution, by installing a thermally conductive adhesive layer between at least two first side walls that are staggered, it is advantageous to further appropriately improve the heat conduction rate between the first battery cells that are staggered, which makes it easier to appropriately dissipate heat during the operation of the first battery cells and realizes thermal management for the battery.

[0011] In some embodiments, the overlapping area of ​​the overlapping portion between the two staggered first battery cells in the second direction is L1, the area of ​​the first sidewall is L2, and the ratio of L1 to L2 ranges from 2 / 9 to 7 / 9.

[0012] In the above technical solution, the ratio L1 / L2 of the area of ​​the overlapping portion of the two staggered first battery cells to the area of ​​the first side wall is set within the range of 2 / 9-7 / 9, so that the two staggered first battery cells have an appropriate facing area in the first direction, which facilitates appropriate heat transfer from each of the two staggered first battery cells to different positions and different components. This allows for temperature control and thermal management of the first battery cells while controlling heat diffusion, which is beneficial to improving the usability of the battery. Furthermore, the size of the staggered overlapping area can be flexibly set, making it easier to adapt the battery to its deployment space.

[0013] In some embodiments, the value range of the ratio of L1 to L2 is 5 / 13-8 / 13.

[0014] In the above technical solution, the ratio L1 / L2 of the area of ​​the overlapping portion of the two offset first battery cells to the area of ​​the first side wall is set within the range of 5 / 13-8 / 13, which is advantageous in further achieving both the suppression of heat diffusion inside the battery and the thermal management of the battery, thereby improving the usage performance of the battery.

[0015] In some embodiments, the battery includes a plurality of rows of battery units, each row of battery units including a plurality of first battery cells, the rows of battery units being arranged in sequence in a first direction, and the first side walls of the battery units of at least two adjacent rows that are oppositely disposed in the first direction being staggered.

[0016] In the above technical solution, the first side walls of at least two battery units adjacent along the first direction are staggered, which is advantageous in reducing the probability of thermal runaway of battery units in adjacent rows due to thermal runaway of a battery unit, thereby further controlling heat diffusion between the battery units in the adjacent rows.

[0017] In some embodiments, each first battery cell includes a second sidewall connected to the first sidewall, and each first battery cell is thermally conductively connected to an adjacent first battery cell via the at least one first sidewall and the at least one second sidewall.

[0018] In the above technical solution, each first battery cell is configured to be thermally conductively connected to an adjacent first battery cell via at least one first side wall and at least one second side wall, so that each first battery cell can transfer heat between itself and its adjacent first battery cell via at least one first side wall and at least one second side wall, facilitating each first battery cell to transfer heat to different first battery cells via the first side wall and the second side wall, for example, each first battery cell can transfer heat to at least two adjacent first battery cells via the first side wall and the second side wall, thereby realizing the dispersed transfer of heat in each first battery cell and advantageously improving the suppression effect against heat diffusion.

[0019] In some embodiments, the battery further includes a housing, wherein a plurality of rows of battery units are provided within the housing, and the plurality of first battery cells of each row of battery units are arranged in sequence along a second direction, the second direction being parallel to the longitudinal direction of the housing.

[0020] In the above technical solution, the plurality of first battery cells in each row of battery cells are arranged in sequence along the second direction, and the second direction is parallel to the longitudinal direction of the housing, which makes it easy for the housing to provide appropriate deployment space for the battery unit and facilitates installation of the battery unit.

[0021] In some embodiments, a partition plate is provided in the housing to define a plurality of storage chambers, and at least two rows of battery units are provided in each storage chamber, with the battery units being staggered.

[0022] In the above technical solution, partition plates are installed inside the housing to define multiple storage chambers, and at least two rows of staggered battery units are installed in each storage chamber, making it easier to group and assemble multiple first battery cells of the battery, improving the convenience of battery assembly. At the same time, the partition plates can provide a certain structural reinforcement to the housing, which is beneficial to improving the reliability of the housing when used.

[0023] In some embodiments, the partition plate is thermally conductively connected to an adjacent battery unit, and the partition plate is thermally conductively connected to the housing.

[0024] In the above technical solution, by installing the partition plate so that it is thermally connected to the adjacent battery units, and by thermally connecting the partition plate to the housing, the battery unit located outermost in the first direction can not only transfer its heat toward the battery units in the adjacent row, but also transfer it to the partition plate and then to the housing, which is advantageous to realize the dispersed transfer of heat from the battery units and further improve the thermal management effect of the battery.

[0025] In some embodiments, the first side walls of any two adjacent rows of battery units that are placed opposite each other are placed at staggered positions.

[0026] In the above technical solution, the opposing first side walls of any two adjacent rows of battery units are staggered, which makes it easier for the heat generated by each first battery cell to be directly and / or indirectly dispersed and transmitted to more adjacent first battery cells, thereby further improving the thermal management effect of the battery.

[0027] In some embodiments, the staggered first battery cells in adjacent rows are electrically connected via a bus bar.

[0028] In the above technical solution, a bus bar is installed so as to connect to first battery cells that are installed with a staggered position in an adjacent row, and by setting the distance by which the positions of the two first battery cells that are installed with a staggered position are shifted, it is easy to adapt to adjustments of the deployment length, deployment posture, etc. of the bus bar, which is advantageous in improving the flexibility of bus bar deployment.

[0029] In some embodiments, the bus bar includes a transition portion and two electrical connection portions, both ends of the transition portion are respectively connected to the two electrical connection portions, an extension direction of the transition portion and the first direction and the second direction form an angle, and the two electrical connection portions are respectively electrically connected to the two first battery cells.

[0030] In the above technical solution, the busbar is arranged to include a transition section and two electrical connection sections, so that the extension direction of the transition section and the first and second directions form an angle. The two electrical connection sections are electrically connected to the two first battery cells, respectively. On the premise that the busbar electrically connects the two first battery cells, the diagonal arrangement of the transition section of the busbar is advantageous to reduce the length of the transition section, thereby reducing the overcurrent path, effectively alleviating heat generation caused by sustained overcurrent, and reducing the amount of heat generated. At the same time, the short span of the busbar is advantageous to stagger the busbar and the pressure relief structure of the first battery cells, reducing the probability that the busbar will block the pressure relief structure and reducing safety risks.

[0031] In some embodiments, the transition section is provided with a tension-deformable buffer section.

[0032] In the above technical solution, by installing a tensile-deformable buffer section at the transition section, the busbar can relieve stress caused by the expansion of the first battery cell during battery use (e.g., in the later stages of use). The buffer section can generate a certain tensile deformation as the first battery cell expands, thereby reducing the tension of the busbar against the pole of the first battery cell and, at the same time, reducing the tensile force experienced by the busbar. This reduces the risk of the busbar being pulled and breaking, and improves the reliability of battery use.

[0033] In some embodiments, a tensionable damper is connected between each electrical connection and the transition section.

[0034] In the above technical solution, buffer sections are installed between each electrical connection section and the transition section, which facilitates multiple relaxation of stress caused by the expansion of the first battery cell, improves the bus bar's adaptability to the expansion and deformation of the first battery cell, and is advantageous for further improving battery performance.

[0035] In some embodiments, the buffer portion includes at least a fold portion having an opening.

[0036] In the above technical solution, the buffer section is configured to include at least a folding section with an opening, so that the folding section can change the width of the opening under the action of external force to alleviate the force, and the folding section has a simple structure and is easy to process.

[0037] In some embodiments, a reinforcing member is provided at the transition portion, and the reinforcing member is a member of electrically conductive material.

[0038] In the above technical solution, by installing a reinforcing member made of a conductive material at the transition section, the overcurrent area of ​​the transition section can be increased and the overcurrent capacity of the busbar can be improved, thereby further reducing the temperature rise caused by overcurrent and improving battery performance.

[0039] In some embodiments, the reinforcing member and the transition section are disposed in a stacked arrangement.

[0040] In the above technical solution, the reinforcing member and the transition section are configured to be stacked, so that the busbar has a nearly stacked design, and the thickness of the busbar in the region corresponding to the transition section can be appropriately increased, thereby improving the overcurrent capacity of the busbar and at the same time reducing the space occupied by the busbar in the first and second directions.

[0041] In some embodiments, the battery further includes a housing, wherein the plurality of rows of battery units are disposed within the housing, and staggered spaces are provided between adjacent rows of staggered battery units and an inner wall of the housing, and a filler is provided within the staggered spaces.

[0042] In the above technical solution, staggered spaces are provided between the staggered battery units of adjacent rows and the inner wall of the housing, and a filler is installed in the staggered spaces, thereby effectively reducing the space loss caused by the staggered installation of the battery units of adjacent rows, and rationally utilizing the batteries to design the remaining space, thereby improving the space utilization rate of the batteries.

[0043] In some embodiments, the filler includes a second battery cell, the second battery cell disposed in the offset space, the second battery cell electrically connected to the first battery cell.

[0044] In the above technical solution, by arranging the second battery cell in a space that is offset, the space that is offset due to the offset installation of the multiple first battery cells can be effectively utilized, which is advantageous in improving the space utilization rate of the battery and improving the volumetric energy density and weight energy density of the battery.

[0045] In some embodiments, the volume of the second battery cell is smaller than the volume of the first battery cell.

[0046] In the above technical solution, the volume of the second battery cell is set to be smaller than the volume of the first battery cell, which is advantageous in matching the volume of the second battery cell with the volume of the offset space. Since the offset space is formed by fitting between the battery cells of an adjacent row that are installed in an offset position and the housing, the volume of the offset space is generally smaller than the volume of the first battery cell, which makes it easier to improve the matching between the second battery cell and the offset space and facilitates the deployment of the second battery cell.

[0047] In some embodiments, in the second direction, the sidewall of the second battery cell is flush with the end face of the battery unit in the adjacent row.

[0048] In the above technical solution, the side wall of the second battery cell is installed flush with the end face of the battery unit in the adjacent row in the second direction, thereby making it possible to arrange the battery pack consisting of the second battery cell and the battery units in parallel and the adjacent battery units in a regular manner, which is advantageous for simplifying the shape of the internal space of the housing and making rational use of the internal space of the housing.

[0049] In some embodiments, the first battery cell and the second battery cell are electrically connected in at least a series connection manner, and the second battery cell and the first battery cell have different chemistries.

[0050] In the above technical solution, the second battery cell and the first battery cell are configured to have different chemical systems, which makes it easy to make the performance of the second battery cell and the first battery cell different. The first battery cell and the second battery cell are electrically connected at least in a series connection manner, which is advantageous to improving the performance of the entire battery by the second battery cell, for example, the second battery cell has a higher low-temperature discharge specific power density than the first battery cell by selecting an appropriate chemical system. The above connection manner of the second battery cell can improve the low-temperature discharge capacity of the battery, and at the same time, it is advantageous to simplify the electrical connection manner of the battery and simplify the structural design of the battery.

[0051] In some embodiments, the packing includes a monitor for detecting the operating state of each first battery cell.

[0052] In the above technical solution, by installing the filler to include a monitor, the monitor is used to detect the operating status of each first battery cell, thereby facilitating the installation of the monitor and at the same time improving the operating safety of the battery.

[0053] In some embodiments, the filler includes a filler thermally conductive member thermally connected to the housing, the filler thermally conductive member being used to conduct heat from the corresponding first battery cell to the housing.

[0054] In the above technical solution, the filler includes a filled thermally conductive material, and the filled thermally conductive material is arranged to be used to conduct the heat of the corresponding first battery cell to the housing, thereby further improving the heat dissipation and transfer of the first battery cell, and thereby further suppressing heat diffusion.

[0055] In some embodiments, the battery further includes a thermally conductive reinforcing member and a housing, wherein the at least two first battery cells are disposed within the housing, and the at least one first battery cell is thermally conductively connected to the thermally conductive reinforcing member, and the thermally conductive reinforcing member is thermally conductively connected to the housing.

[0056] In the above technical solution, the thermal conductive reinforcing member is thermally connected to at least one first battery cell and is also thermally connected to the housing. This allows the thermal conductive reinforcing member to conduct heat from the at least one first battery cell to the housing, further improving the heat dissipation and transfer of the first battery cell, thereby further suppressing heat diffusion. At the same time, the thermal conductive reinforcing member can provide a certain structural reinforcement effect to the first battery cell and / or the housing, which is beneficial to improving the reliability of battery use.

[0057] In some embodiments, the thermally conductive reinforcing member is sandwiched between first battery cells that are arranged opposite each other in a first direction, and the thermally conductive reinforcing member is thermally connected to a first sidewall of the corresponding first battery cell.

[0058] In the above technical solution, a thermally conductive reinforcing member is installed to be thermally conductively connected to the first side wall of the opposing first battery cell along a first direction, thereby increasing the heat exchange area between the thermally conductive reinforcing member and the corresponding first battery cell, thereby improving the heat transfer efficiency between the thermally conductive reinforcing member and the first battery cell and improving the temperature control effect of the battery. The thermally conductive reinforcing member can also provide a certain reinforcement effect to the first side wall corresponding to the first battery cell, thereby increasing the deformation resistance ability of the first side wall corresponding to the first battery cell, and thereby reducing the probability of the first battery cell being subjected to uneven forces, which is prone to problems such as localized lithium deposition and thermal runaway.

[0059] In some embodiments, a cavity is provided within the thermally conductive reinforcement member to provide stress relief.

[0060] In the above technical solution, a stress-relieving cavity is provided in the thermal reinforcement member. This allows the thermal reinforcement member to deform when subjected to the force of the first battery cell when the first battery cell expands during use, reducing the compressive force between the thermal reinforcement member and the first battery cell, preventing damage to the thermal reinforcement member and the first battery cell, and improving the reliability of the thermal reinforcement member and the first battery cell. At the same time, the provision of a cavity can accommodate the assembly tolerances for each row of the first battery cell during the assembly process of the thermal reinforcement member and the first battery cell, improving the convenience of assembling the thermal reinforcement member and the first battery cell. The provision of a cavity is also beneficial for reducing the weight of the thermal reinforcement member, thereby reducing the weight of the battery and improving the weight-energy density of the battery.

[0061] In some embodiments, the thermally conductive reinforcing member includes two thermally conductive side walls disposed opposite each other, the thermally conductive side walls being thermally conductively connected to the opposing first side wall, and a support structure is provided within the cavity, the support structure being connected to the two thermally conductive side walls, respectively.

[0062] In the above technical solution, by installing a support structure connected to each of the two heat-conducting side walls in the cavity, the support structure can support the two heat-conducting side walls, thereby increasing the bending deformation resistance ability of the heat-conducting reinforcement member and improving the reliability of the heat-conducting reinforcement member.

[0063] In some embodiments, the support structure is formed into a network structure that is filled with heat absorbing material.

[0064] In the above technical solution, the support structure is arranged to form a mesh structure, and the heat-absorbing material element is arranged in the cavity, which can easily reduce the obstruction of the support structure to the heat-absorbing material element, and is advantageous to improve the filling ability of the heat-absorbing material element into the cavity, and make it easier for the heat-absorbing material element to contact the heat-conducting side wall, which is advantageous to improve the heat-conducting ability. At the same time, it is advantageous to reduce the requirements for the material state of the heat-absorbing material element, and can also reduce the requirements for the material state change of the heat-absorbing material element when the heat-absorbing material element undergoes a material state change during the heat-absorbing process.

[0065] In some embodiments, the battery further includes a heat exchange plate and a thermally conductive insert member, wherein in a third orientation, the heat exchange plate is located on one side of the at least two first battery cells, the third orientation being perpendicular to the first orientation and the second orientation, respectively, and wherein a heat exchange passage for distributing a heat exchange medium is provided within the heat exchange plate, and the insert member is provided on a surface of the heat exchange plate adjacent to the first battery cells and is thermally conductively connected to the first battery cells.

[0066] In the above technical solution, a heat exchange plate and an insert member are installed, and a heat exchange passage for distributing a heat exchange medium is provided in the heat exchange plate, the insert member is thermally connected to the first battery cell, and the heat exchange plate can exchange heat with the first battery cell at least through the insert member, thereby further reducing the heat transferred from the first battery cell to other first battery cells, and thereby further suppressing heat diffusion.

[0067] In some embodiments, a first sidewall of the at least one first battery cell is thermally connected to the insert member.

[0068] In the above technical solution, the insert member is installed to be thermally connected to the first side wall of at least one first battery cell, thereby increasing the heat exchange area between the insert member and the corresponding first battery cell, thereby improving the heat transfer efficiency between the insert member and the first battery cell and the temperature control effect of the battery. The insert member can also provide a certain reinforcement effect to the first side wall corresponding to the first battery cell, thereby increasing the deformation resistance ability of the first side wall corresponding to the first battery cell, and thereby reducing the probability of the first battery cell being subjected to uneven forces, which is prone to problems such as localized lithium deposition and thermal runaway.

[0069] In some embodiments, the insert and the heat exchange plate are a unitary member.

[0070] In the above technical solution, the insert member and the heat exchange plate are installed as an integral structural member, which makes it easier to improve the strength of the insert member and the heat exchange plate, saves the process of connecting the insert member and the heat exchange plate, and improves the assembly efficiency of the battery.

[0071] In some embodiments, the battery further includes a fixing bracket that limits displacement of each first battery cell.

[0072] In the above technical solution, a fixing bracket is installed to limit the displacement of each first battery cell, thereby imposing a certain restriction on each first battery cell, thereby increasing the structural strength between the multiple first battery cells, making it easier to form the multiple first battery cells into a stable whole, and improving the reliability of the battery.

[0073] In some embodiments, the battery includes multiple rows of battery units, each row of battery units including multiple first battery cells, the multiple rows of battery units being arranged in sequence in a first direction, each row of battery units being provided with a corresponding fixing bracket, and the multiple first battery cells of each row of battery units being attached to the fixing bracket.

[0074] In the above technical solution, by installing a fixing bracket corresponding to each row of battery units and installing multiple first battery cells of each row of battery units so that they are attached to the fixing bracket, the arrangement of the fixing bracket and the arrangement of the battery units are coordinated, so that the fixing bracket can provide a certain positional restriction for each first battery cell of each row of battery units, improving the reliability of the entire battery, and at the same time, the arrangement of the fixing bracket does not affect the relative arrangement between the first battery cells of two adjacent rows of battery units.

[0075] In some embodiments, each fixing bracket includes a connection bracket provided with a plurality of escape openings for the terminal posts of the first battery cell, and a plurality of extension brackets installed on the connection bracket at intervals, each extension bracket provided with a retaining plate, the first battery cell being provided between adjacent extension brackets, and the retaining plate abutting the first side wall.

[0076] In the above technical solution, the connecting bracket is configured to have an escape hole for the electrode post, so that the electrode post can be fitted into the escape hole and can be installed at a distance from the peripheral wall of the escape hole, so that the connecting bracket does not interfere with the electrode post and at the same time there is a certain distance between the electrode post and the connecting bracket, which is advantageous to improving the insulation performance between the connecting bracket and the electrode post. By arranging the first battery cell between adjacent extension brackets, the two adjacent extension brackets can easily restrict the displacement of the corresponding first battery cell in the second direction, and the retaining plate abuts the first side wall, and the retaining plate can be easily used to restrict the displacement of the corresponding first battery cell in the first direction.

[0077] According to a second aspect, an embodiment of the present application further provides a power consuming device, the power consuming device including the battery described above, the battery being used to provide electrical energy.

[0078] In the above technical solution, the battery is installed in the power consuming device, and the heat dissipation of the battery is easily controlled, which is advantageous to improving the reliability of the power consuming device. [Brief explanation of the drawings]

[0079] The above and / or additional aspects and advantages of the present application will become apparent and readily understood from the following description of exemplary embodiments in conjunction with the drawings, in which: [Figure 1] 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. [Figure 2] 1 is an exploded view of a battery according to some embodiments of the present application. FIG. [Figure 3] 1 is a structural schematic diagram of a first battery cell according to some embodiments of the present application; [Figure 4] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 5] 5 is a schematic orthographic projection view of two first side walls staggered in position in FIG. 4 along a first direction. FIG. [Figure 6]1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 7] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 8] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 9] FIG. 1 is a schematic diagram of a busbar according to some embodiments of the present application. [Figure 10] 10A to 10C are schematic diagrams of several other bus bars shown in FIG. 9. [Figure 11] FIG. 1 is a schematic diagram of a busbar according to some embodiments of the present application. [Figure 12] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 13] FIG. 13 is an enlarged view of the circled portion A in FIG. [Figure 14] 1A-1D are several schematic diagrams of a battery according to some embodiments of the present application. [Figure 15] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 16] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 17] FIG. 17 is another schematic diagram of the battery shown in FIG. 16. [Figure 18] 1A-1D are several schematic diagrams of a battery according to some embodiments of the present application. [Figure 19] 1A-1D are several schematic diagrams of a battery according to some embodiments of the present application. [Figure 20] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 21] FIG. 21 is an enlarged view of the part B circled in FIG. 20. [Figure 22] 1 is a schematic diagram of a heat exchange plate and insert according to some embodiments of the present application. [Figure 23] 23 is a schematic diagram of the heat exchange passages of the heat exchange plate shown in FIG. 22. [Figure 24] 1 is a structural schematic diagram of a battery according to some embodiments of the present application. [Figure 25] FIG. 25 is an enlarged view of the circled portion C in FIG. 24. [Figure 26] FIG. 25 is a schematic view of the fixing bracket shown in FIG. 24. [Figure 27] FIG. 27 is an enlarged view of the circled portion D in FIG. 26. DETAILED DESCRIPTION OF THE INVENTION

[0080] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present application, the following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative efforts fall within the scope of protection of the present application.

[0081] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art of this application, and the terms used in the specification of this application are only for describing specific embodiments and are not intended to limit this application, and the terms "comprises," "has," and any variations thereof in the specification and claims of this application and the above drawings are intended to cover a non-exclusive "comprise." The terms "first," "second," etc. in the specification and claims of this application or the above drawings are not intended to describe a specific order or a hierarchical relationship, but are intended to distinguish different objects.

[0082] An "embodiment" referred to in this application means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of this phrase in various places in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive, separate, or alternative embodiments of other embodiments.

[0083] The term "and / or" in this application is merely a relational relationship describing related objects, and indicates that three relationships may exist, for example, A and / or B may represent three cases: A alone, a combination of A and B, and B alone. Also, the character " / " in this application generally indicates that the related objects before and after are in an "or" relationship.

[0084] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments will be omitted. It should be understood that the dimensions such as thickness, aspect, etc. of various components in the embodiments of the present application shown in the drawings, and the dimensions such as thickness, aspect, etc. of the entire integrated device are for illustrative purposes only and do not constitute any limitations on the present application.

[0085] The term "plurality" as used herein refers to two or more (including two).

[0086] In this application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium-lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., but the embodiments of this application are not limited thereto. The battery cell may have a cylindrical, flat, rectangular, or other shape, etc., but the embodiments of this application are not limited thereto. Battery cells are generally divided into three types based on packaging method: cylindrical battery cells, rectangular battery cells, and pouch battery cells, but the embodiments of this application are not limited thereto.

[0087] The battery referred to in the embodiments of this application is a single physical module that includes multiple battery cells and provides higher voltage and capacity. For example, the battery referred to in this application may be a battery module or a battery pack. A battery module generally includes multiple battery cells. A battery generally includes a housing for packaging multiple battery cells or multiple battery modules. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells. Of course, a battery may not include a housing.

[0088] For example, a battery cell may generally include a case, a battery core assembly, and an electrolyte. The case is used to accommodate the battery core assembly and the electrolyte, and at least one positive electrode post and at least one negative electrode post are provided in the case. The battery core assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding a positive electrode plate, a negative electrode plate, and a separator.

[0089] Here, the positive electrode plate may generally include a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer being directly or indirectly coated on the positive electrode current collector, the positive electrode current collector not coated with the positive electrode active material layer protruding from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector not coated with the positive electrode active material layer serving as a positive electrode tab, with the plurality of positive electrode tabs being stacked and forming an electrical connection with the positive electrode post. Exemplarily, the stacked plurality of positive electrode tabs may be directly welded to the positive electrode post to form the electrical connection, or the battery core assembly may further include a positive electrode adapter plate, with the stacked plurality of positive electrode tabs welded to one end of the positive electrode adapter plate and the other end of the positive electrode adapter plate welded to the positive electrode post, thereby forming an electrical connection between the positive electrode tab and the positive electrode post.

[0090] A negative electrode plate generally includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is directly or indirectly coated on the negative electrode current collector. The negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer coated thereon. The negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The negative electrode tabs are stacked and electrically connected to the negative electrode post. For example, the stacked negative electrode tabs may be directly welded to the negative electrode post to form an electrical connection. Alternatively, the battery core assembly may further include a negative electrode adapter plate. The stacked negative electrode tabs are welded to one end of the negative electrode adapter plate and the other end of the negative electrode adapter plate are welded to the negative electrode post to electrically connect the negative electrode tabs to the negative electrode post. The material of the separator is not limited and may be, for example, polypropylene or polyethylene.

[0091] The pressure relief structure on the battery cell mentioned in this application is used to release gas inside the battery cell when the internal pressure of the battery cell is too large (for example, caused by overcharging, etc.), thereby reducing the internal pressure of the battery cell and preventing the inside of the battery cell from being rapidly pressurized and causing the battery cell to deflagrate, etc. For example, the pressure relief structure may be an explosion-proof valve, an explosion-proof sheet, etc.

[0092] In recent years, new energy vehicles have made great strides, and in the field of electric vehicles, batteries play an irreplaceable and important role as the power source of electric vehicles. Here, as a core component of new energy vehicles, batteries have relatively high requirements in terms of energy density and reliability.

[0093] In the related art, a battery includes a plurality of battery cells, and when one battery cell experiences thermal runaway, the heat transferred from this battery cell to the remaining single battery cell is relatively large, resulting in relatively fast heat diffusion.

[0094] Based on the above considerations, in order to suppress heat diffusion in a battery, a battery is provided, the battery including at least two first battery cells, each of which has a plurality of side walls, the plurality of side walls including a first side wall, the first side wall being the side wall of the first battery cell with the largest area, the first side walls of the at least two first battery cells being arranged opposite each other in a first direction and offset in a second direction, the first direction and the second direction being arranged perpendicular to each other, and the first direction being perpendicular to the first side wall.

[0095] In the above technical solution, by arranging at least two first battery cells in a staggered manner, it is advantageous to make full use of the battery arrangement space and improve the adaptability of multiple first battery cells to arrangement spaces of different shapes. At the same time, the two first battery cells arranged in a staggered manner can reduce the amount of heat transferred from one of the first battery cells to the other opposing first battery cell, so that when a first battery cell experiences thermal runaway, the heat transferred from the thermally runaway first battery cell to the adjacent first battery cell can be reduced, reducing the probability of the adjacent first battery cell experiencing thermal runaway and achieving the purpose of suppressing heat diffusion, which is advantageous to improving the reliability of battery use.

[0096] An embodiment of the present application provides a power-consuming device that uses the battery of the present disclosure as a power source, and the power-consuming device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a steamship, a spacecraft, etc. Here, the electric toy may include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric boat toy, and an electric plane toy, and the spacecraft may include an airplane, a rocket, a spacecraft, a spaceship, etc.

[0097] For convenience of description, the following embodiments will describe in detail the structures of the power consumption device 1000, the battery 200, and the battery cells (e.g., the first battery cell 10 and the second battery cell 61 described below) of the present application, using the power consumption device 1000 as an example of a vehicle.

[0098] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a power consumption device 1000 according to some embodiments of the present application, which is a vehicle. The vehicle may be a gasoline-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range-extender vehicle, etc. A battery 200 is installed in the vehicle, and the battery 200 may be installed at the bottom, head, or tail of the vehicle. The battery 200 may be used to power the vehicle, for example, as an operating power source for the vehicle. The vehicle may further include a controller 300 and a motor 400, and the controller 300 is used to control the battery 200 to power the motor 400, for example, for starting the vehicle, navigating, and meeting the operating power consumption needs during driving. In some embodiments of the present application, the battery 200 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, providing driving power to the vehicle instead of, or partially replacing, gasoline or natural gas.

[0099] Referring to FIG. 2, FIG. 2 is an exploded view of a structure in which battery cells (e.g., a plurality of battery cells includes a plurality of first battery cells 10 and no second battery cell 61, or a plurality of battery cells includes a plurality of first battery cells 10 and at least one second battery cell 61) according to some embodiments of the present application are used in a battery 200. The battery 200 includes a housing 30 and a plurality of battery cells housed in the housing 30. Here, the housing 30 is used to provide an assembly space for the battery cells, and the housing 30 may adopt various structures. In some embodiments, the housing 30 may include a first housing 301 and a second housing 302, which are fitted to each other and together define a housing cavity for housing the battery cells. The second housing 302 may be a hollow structure with one end open, and the first housing 301 may be a plate-like structure, with the first housing 301 fitted over the open side of the second housing 302, so that the first housing 301 and the second housing 302 jointly define an accommodating cavity, or the first housing 301 and the second housing 302 may both be hollow structures with one end open (for example, as shown in FIG. 2), with the open side of the first housing 301 fitted over the open side of the second housing 302. Of course, the housing 30 formed by the first housing 301 and the second housing 302 may have various shapes, such as a cylinder or a rectangular parallelepiped.

[0100] In battery 200, the multiple battery cells may be connected in series, parallel, or series-parallel, and a series-parallel connection refers to both a series and parallel connection among the multiple battery cells. The multiple battery cells may be directly connected in series, parallel, or series-parallel together, and then the entire configuration of the multiple battery cells may be housed within housing 30. Alternatively, battery 200 may be formed by first connecting multiple battery cells in series, parallel, or series-parallel to form a battery module, and then connecting the multiple battery modules in series, parallel, or series-parallel to form a whole and housed within housing 30. Battery 200 may further include other structures, for example, battery 200 may further include bus bars for achieving electrical connection between the multiple battery cells.

[0101] Referring to Figure 3, Figure 3 is a structural schematic diagram of a battery cell (e.g., a first battery cell 10 and a second battery cell 61 described below) according to some embodiments of the present application. The battery cell has a rectangular parallelepiped shape, and the height direction of the battery cell is the third direction Z, the longitudinal direction of the battery cell is the second direction Y, and the thickness direction of the battery cell is the first direction X. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other, two by two. Without being limited thereto, in other embodiments of the present application, the battery cell may have a polygonal prism, a flat body, or other shapes.

[0102] 3-5, in an embodiment of the present application, the battery 200 includes at least two first battery cells 10, each of which has a plurality of side walls 11, and the plurality of side walls 11 includes a first side wall 111, which is the side wall 11 with the largest area of ​​the first battery cell 10, and which is the "large surface" of the first battery cell 10. The number of first side walls 111 included in the first battery cell 10 may be one or more, and the number of first side walls 111 included in the plurality of first battery cells 10 may be equal or unequal.

[0103] Here, the first side walls 111 of at least two first battery cells 10 are arranged opposite to each other in the first direction X, and the first side walls 111 of the at least two first battery cells 10 are arranged with a position offset in the second direction Y. This makes it easy for a part of the orthogonal projection along the first direction X of each of the two first side walls 111 arranged opposite to each other along the first direction X to be located outside, in the second direction Y, the outer contour of the orthogonal projection along another first direction X, and another part to overlap with the orthogonal projection along the other first direction X. The two first battery cells 10 corresponding to the two installed first side walls 111 are installed with a staggered position in the second direction Y, and any two adjacent first battery cells 10 among the at least two first battery cells 10 are installed with a staggered position in the second direction Y, and in this case, two non-adjacent first battery cells 10 among the at least two first battery cells 10 may be installed with a staggered position in the second direction Y, or two non-adjacent first battery cells 10 among the at least two first battery cells 10 may be installed directly opposite to each other in the second direction Y. Here, the first direction X and the second direction Y are installed perpendicular to each other, and the first direction X is perpendicular to the first side wall 111.

[0104] As can be understood, when two first battery cells 10 are adjacent in the first direction X, it may be understood that no other first battery cell 10 is placed between the two first battery cells 10 in the first direction X, and when two first battery cells 10 are not adjacent in the first direction X, it may be understood that at least one other first battery cell 10 is placed between the two first battery cells 10 in the first direction X.

[0105] For example, if the number of first battery cells 10 in the battery 200 is m, m is a positive integer and m≧2, and among the m first battery cells 10, the first side walls 111 of n first battery cells 10 are arranged opposite each other along the first direction X and staggered in the second direction Y, that is, the n first battery cells 10 are arranged staggered, then any two adjacent first battery cells 10 among the n first battery cells 10 are arranged staggered, and n is a positive integer and 2≦n≦m. For two adjacent first battery cells 10 that are installed at different positions, a portion of the orthogonal projection of the first side wall 111 of one of the first battery cells 10 along the first direction X is located on one side, in the second direction Y, of the outer contour of the orthogonal projection of the first side wall 111 of the other first battery cell 10 along the first direction X, and another portion is located within the outer contour of the orthogonal projection of the first side wall 111 of the other first battery cell 10 along the first direction X. Also, a portion of the orthogonal projection of the first side wall 111 of the other first battery cell 10 along the first direction X is located on one side, in the second direction Y, of the outer contour of the orthogonal projection of the first side wall 111 of the one of the first battery cells 10 along the first direction X, and the other portion is located within the outer contour of the orthogonal projection of the first side wall 111 of the one of the first battery cells 10 along the first direction X. At this time, the orthogonal projections of the two first side walls 111 disposed at offset positions along the first direction X partially overlap each other.

[0106] For example, referring to FIG. 5 , the area formed by combining the first area Ω1 and the second area Ω2 is an orthogonal projection along the first direction X of the first side wall 111 of one of the first battery cells 10, the area formed by combining the second area Ω2 and the third area Ω3 is an orthogonal projection along the first direction X of the first side wall 111 of the other first battery cell 10, and the second area Ω2 is an overlapping area of ​​the orthogonal projection along the first direction X of the first side walls 111 of the two first battery cells 10 that are installed with their positions shifted. As can be seen from the above, for one of the first battery cells 10, The first region Ω1 is located outside the outer contour of the orthogonal projection of the first side wall 111 of the other first battery cell 10 along the first direction X, and the second region Ω2 is located within the outer contour of the orthogonal projection of the first side wall 111 of the other first battery cell 10 along the first direction X. With respect to the other first battery cell 10, the third region Ω3 is located outside the outer contour of the orthogonal projection of the first side wall 111 of the one first battery cell 10 along the first direction X, and the second region Ω2 is located within the outer contour of the orthogonal projection of the first side wall 111 of the one first battery cell 10 along the first direction X.

[0107] As can be seen from the above, staggering the positions of at least two first battery cells 10 is advantageous for making full use of the deployment space of the battery 200. At the same time, staggering the positions of the first battery cells 10 can also be applied to irregular deployment spaces, and the distance by which the positions of the first battery cells 10 are staggered can be adaptively adjusted to some extent based on the shape of the deployment space, thereby improving the adaptability of the battery cells to the deployment space.

[0108] Furthermore, if heat exchange occurs between two staggered first battery cells 10, the "large surfaces" of the two staggered first battery cells 10 can be arranged to be staggered in the second direction Y, thereby reducing the heat exchange area between the two staggered first battery cells 10 and reducing the heat transfer amount between the two staggered first battery cells 10, which is advantageous for lowering the peak heat transfer power. When thermal runaway occurs in a first battery cell 10, the first battery cell 10 can be prevented from transferring heat mainly to one of the first battery cells 10, and the heat of the thermal runaway first battery cell 10 can be transferred in a relatively dispersed manner, thereby reducing the heat transferred by the thermal runaway first battery cell 10 to the remaining first battery cells 10, thereby achieving the purpose of suppressing heat diffusion and improving the reliability of use of the battery 200. At the same time, the temperature rise during use, for example, due to fast charging, can be reduced.

[0109] For example, among the multiple first battery cells 10 of the battery 200, at least one first battery cell 10 and two first battery cells 10 are installed with their positions shifted from each other, and in this case, the heat generated by the first battery cell 10 can be dispersed and transferred to the two first battery cells 10, thereby effectively reducing the heat transfer peak power and the amount of heat transferred between the two first battery cells 10, thereby controlling the heat diffusion and improving the usage reliability of the battery 200.

[0110] 4, the first battery cell 10 has a rectangular parallelepiped shape and two first side walls 111 arranged opposite each other along the first direction X, and at least one first side wall 111 of the first battery cell 10 and the first side wall 111 of another first battery cell 10 are arranged opposite each other in the first direction X and are offset from each other in the second direction Y. Of course, the shape of the first battery cell 10 is not limited to this.

[0111] In the above technical solution, by arranging at least two first battery cells 10 in a staggered manner, it is advantageous to fully utilize the arrangement space of the battery 200 and improve the adaptability of multiple first battery cells 10 to arrangement spaces of different shapes. At the same time, the two first battery cells 10 arranged in a staggered manner can reduce the amount of heat transferred from one of the first battery cells 10 to the other opposite first battery cell 10, so that when a first battery cell 10 experiences thermal runaway, the heat transferred from the thermally runaway first battery cell 10 to the adjacent first battery cell 10 can be reduced, reducing the probability of the adjacent first battery cell 10 experiencing thermal runaway, further achieving the purpose of suppressing heat diffusion and advantageous to improving the usage reliability of the battery 200. Furthermore, the above arrangement does not require any additional structure to the battery 200, thereby simplifying the structure of the battery 200.

[0112] Referring to FIG. 4 , in some embodiments of the present application, at least two first side walls 111 that are staggered are thermally conductively connected, that is, when two first battery cells 10 corresponding to the two first side walls 111 that are staggered exchange heat through the corresponding two first side walls 111, each of the two first battery cells 10 that are staggered can transfer heat to the other through the thermally conductive connecting portions of the corresponding two first side walls 111.

[0113] In the above technical solution, by thermally conductively connecting at least two first side walls 111 that are staggered, it is advantageous to appropriately improve the heat transfer efficiency between the two first battery cells 10 that are staggered, thereby more quickly dissipating the heat inside the battery 200 and advantageous to the thermal management control of the battery 200.

[0114] It should be noted that in the embodiments of the present application, "thermally conductively connected" may be understood to mean that there is heat exchange between two members, including direct heat exchange between the two members (where the heat of one member is directly transferred to the other member, and the two members are placed in contact with each other) and indirect heat exchange between the two members (where the heat of one member is transferred to the other member via other structures, such as a thermally conductive adhesive, a thermally conductive member, etc.). Also, "thermally conductively connected" refers to one of the two members transferring heat to the other member, i.e., for one member, this member can transfer heat to the other member, or the other member can transfer heat to this member.

[0115] For example, the thermally conductive connection of two first side walls 111 may include one of the first battery cells 10 transferring heat to the other first battery cell 10 through the first side wall 111, and the other first battery cell 10 transferring heat to the one of the first battery cells 10 through the first side wall 111.

[0116] In some embodiments of the present application, a thermally conductive adhesive layer is provided between at least two first side walls 111 that are offset from one another.

[0117] In the above technical solution, by installing a thermally conductive adhesive layer between at least two first side walls 111 that are installed at staggered positions, it is advantageous to further appropriately improve the heat conduction speed between the first battery cells 10 that are installed at staggered positions, making it easier to appropriately dissipate heat during the operation of the first battery cells 10, and realizing thermal management for the battery 200.

[0118] Referring to FIG. 5 , in some embodiments of the present application, the overlapping area of ​​the overlapping portion between two first battery cells 10 that are staggered in the second direction Y is L1, the area of ​​the first side wall 111 is L2, and the value range of the ratio L1 / L2 of L1 to L2 is 2 / 9-7 / 9.

[0119] For example, referring to FIG. 5 , when the two first battery cells 10 installed at different positions are the first first battery cell 10 and the second first battery cell 10, the second region Ω2 is an overlapping region of the two opposing first side walls 111 of the two first battery cells 10 projected orthogonally along the first direction X, and the area of ​​the second region Ω2 is L1. The region formed by combining the first region Ω1 and the second region Ω2 is an overlapping region of the first side wall 111 of the first first battery cell 10 projected orthogonally along the first direction X, and the area of ​​the second region Ω2 is L1. The configured regions are orthogonal projections of the first sidewall 111 of the second first battery cell 10 along the first direction X, where the sum of the areas of the first region Ω1 and the second region Ω2 is the area L2' of the first sidewall 111 of the first first battery cell 10, and the sum of the areas of the second region Ω2 and the third region Ω3 is the area L2'' of the first sidewall 111 of the second first battery cell 10. L2' and L2'' may or may not be equal, and L2 may be either L2' or L2''. The range of values ​​of L1 / L2' and L1 / L2'' is 2 / 9 to 7 / 9. Here, the shapes of the first region Ω1, the second region Ω2, and the third region Ω3 are not specifically limited. For example, the first battery cell 10 is a rectangular parallelepiped, and the first region Ω1, the second region Ω2, and the third region Ω3 are all square regions.

[0120] In the above technical solution, the ratio L1 / L2 of the area of ​​the overlapping portions of the two staggered first battery cells 10 to the area of ​​the first side wall 111 is set within the range of 2 / 9-7 / 9. This allows the two staggered first battery cells 10 to have appropriate facing areas in the first direction X, thereby facilitating appropriate heat transfer from the two staggered first battery cells 10 to different positions and components. This allows for control of heat diffusion, while simultaneously achieving temperature control and heat management of the first battery cells 10, which is beneficial to improving the performance of the battery 200. Furthermore, the size of the overlapping area of ​​the staggered first battery cells 10 can be flexibly set, making it easier for the battery 200 to adapt to its deployment space.

[0121] For example, the ratio of L1 to L2, L1 / L2, may be 2 / 9, 1 / 3, 1 / 2, 5 / 9, 2 / 3, or 7 / 9.

[0122] For example, in the example of Figure 5, the two first side walls 111 that are staggered are thermally connected, and L1 / L2 is located within the range of 2 / 9-7 / 9, and the heat of each of the two first battery cells 10 that are staggered can be transferred to another first battery cell 10 and other positions (e.g., other first battery cells 10), thereby achieving both suppression of heat diffusion inside the battery 200 and thermal management of the battery 200.

[0123] In some embodiments of the present application, the ratio of L1 to L2, L1 / L2, ranges from 5 / 13 to 8 / 13.

[0124] In the above technical solution, the ratio L1 / L2 of the area of ​​the overlapping portion of the two offset first battery cells 10 to the area of ​​the first side wall 111 is set within the range of 5 / 13-8 / 13, which is advantageous in further achieving both the suppression of heat diffusion and heat management of the battery 200 and improving the usage performance of the battery 200.

[0125] For example, the ratio L1 / L2 of L1 to L2 may be 5 / 13, 6 / 13, 7.5 / 13, 8 / 13, etc.

[0126] 4, 6, and 7, in some embodiments of the present application, a battery 200 includes multiple rows of battery units 10A, each row of battery units 10A including multiple first battery cells 10, the multiple rows of battery units 10A being sequentially arranged in a first direction X, and the first side walls 111 of the battery units 10A of at least two adjacent rows, which are arranged opposite each other in the first direction X, are staggered, so that the battery units 10A of the at least two adjacent rows are staggered.

[0127] As can be seen from the above, when the battery units 10A are referred to as an m'-th row, m' is a positive integer and m'≧2, and the first side walls 111 of adjacent battery units 10A in the n'-th row are arranged to face each other in the first direction X, and if 2≦n'≦m', then the first side walls 111 of any two adjacent rows of battery units 10A in the n'-th row are arranged to face each other in the first direction X, and .... In the two rows of battery units 10A, at least one first side wall 111 of the battery units 10A in each row and at least one first side wall 111 of the other row are arranged with a shift in position along the second direction Y, and at least one first battery cell 10 of the battery units 10A in each row and at least one first battery cell 10 of the other row are arranged with a shift in position along the second direction Y, and at this time, the battery units 10A of any two adjacent rows in the n' rows of battery units 10A are arranged with a shift in position.

[0128] For example, the battery units 10A are arranged in three rows, and two adjacent rows of the battery units 10A have their first side walls 111, which are installed opposite each other in the first direction X, offset from one another, while the remaining row of battery units 10A and any one of the two adjacent rows of battery units 10A have their first side walls 111, which are installed opposite each other in the first direction X, not offset from one another, or any two adjacent rows of the three rows of battery units 10A have their first side walls 111, which are installed opposite each other in the first direction X, offset from one another. Of course, the battery units 10A may have four or more rows.

[0129] In the above technical solution, the first side walls 111 of at least two adjacent battery units 10A along the first direction X are staggered to reduce the probability of thermal runaway of the battery units in the adjacent rows, thereby further controlling the heat diffusion between the battery units 10A in the adjacent rows.

[0130] 4, 6, and 7, the plurality of first battery cells 10 of the battery units 10A in each column are sequentially arranged along the second direction Y. In the battery units 10A in adjacent columns, the plurality of first battery cells 10 of the battery units 10A in each column have first side walls 111 located on the same side, and each of the plurality of first side walls 111 located on the same side is offset in position along the second direction Y from each of the plurality of first side walls 111 facing the battery units 10A in the other column. Each first battery cell 10 in the battery units 10A in each column is offset in position along the second direction Y from the corresponding one or two first battery cells 10 in the battery units 10A in the other column. That is, the first battery cells 10 in the battery units 10A in each column and the first battery cells 10 facing the battery units 10A in the other column are offset in position along the second direction Y. The number of first battery cells 10 staggered relative to the corresponding battery units 10A is equal to the number of first battery cells 10 in the battery unit 10A of that row, which is advantageous for maximizing control of heat diffusion and heat management between adjacent battery units 10A. In this case, the plurality of first battery cells 10 of the battery 200 may be arranged in a brickwork structure. The above-mentioned arrangement of the plurality of first battery cells 10 is advantageous for reducing the number of first battery cells 10 arranged in the first direction of the battery 200, which reduces the deformation of the entire battery 200 in the first direction due to the expansion of the first battery cells 10, making it possible to control the deformation of the battery 200 and improve the safety factor of the battery 200. It is also advantageous for improving the expansion force of the first battery cells 10 and the pressing force between two adjacent first battery cells 10 in the first direction.

[0131] For example, the multiple first battery cells 10 of each row of battery units 10A are arranged in sequence along the second direction Y, and the number of battery units 10A in the battery 200 is smaller than the number of first battery cells 10 in the battery units 10A, thereby making it possible to control the deformation of the battery 200 in the first direction.

[0132] Of course, the arrangement of the multiple first battery cells 10 in each row of battery units 10A is not limited to this, and the battery unit 10A may also be configured so that the number of first battery cells 10 of the battery unit 10A that are installed with their positions shifted from the corresponding first battery cells 10 of the battery units 10A in another row is smaller than the number of first battery cells 10 of the battery unit 10A. For example, the battery unit 10A may also be configured so that some of the first battery cells 10 of the battery unit 10A are installed with their positions shifted from the corresponding first battery cells 10 of the battery units 10A in an adjacent row, and some of the other first battery cells 10 are installed without their positions shifted from the corresponding first battery cells 10 of the battery units 10A in another adjacent row.

[0133] 3 and 8, the battery unit 10A includes a plurality of first battery cells 10, each of which includes a first side wall 111 and a second side wall 112 that form an angle. The battery units 10A of at least two adjacent rows have the first side walls 111 that are offset from each other in the first direction X. The first side walls 111 of at least some of the first battery cells 10 are positioned directly opposite the first side walls 111 of the adjacent row, and other parts of the first side walls 111 of at least some of the first battery cells 10 are positioned directly opposite the second side walls 112 of the adjacent row. This similarly achieves heat dissipation and transmission among the first battery cells 10, thereby suppressing heat diffusion. Furthermore, any two adjacent first battery cells 10 in the same battery unit 10A are arranged crosswise to define an open space, and two first battery cells 10 arranged crosswise in another battery unit 10A are provided in the open space. The arrangement patterns of the multiple first battery cells 10 in adjacent battery cells 10A are consistent, making it easy to achieve an orderly arrangement of multiple battery cells 10A in the first direction. For example, the second side wall 112 of one of any two adjacent first battery cells 10 in the battery unit 10A is parallel to the first side wall 111 of the other battery cell 10 and is arranged completely opposite the other first side wall 111, and the two are thermally connected.

[0134] For example, the first side walls 111 of two cross-placed first battery cells 10 are disposed perpendicularly. For example, a battery unit 10A includes three first battery cells 10, and the first battery cells 10 include two first side walls 111 disposed opposite each other along a first direction and two second side walls disposed opposite each other along a second direction, and the second direction is the left-right direction. In the battery unit 10A in a single row, a part of the first side wall 111 of the middle first battery cell 10 in the left-right direction is disposed perpendicularly to the first side wall 111 of the first battery cell 10 in the adjacent row. The first battery cell 10 of the middle first battery cell 10 faces directly and is thermally conductively connected to a portion of the side wall 111 of the middle first battery cell 10, another portion of the first side wall 111 of the middle first battery cell 10 faces directly and is thermally conductively connected to the second side wall 112 of the left first battery cell 10, and the right second side wall 112 of the middle first battery cell 10 faces directly and is thermally conductively connected to a portion of the first side wall 111 of the right first battery cell 10, and at this time the three first battery cells 10 of the battery unit 10A are arranged in a substantially zigzag shape.

[0135] In another embodiment of the present application, at least one row of the multiple rows of battery units 10A includes multiple first battery cells 10, and at least one row of the remaining battery units 10A includes one first battery cell 10.

[0136] Referring to Figures 4 and 6-8, in some embodiments of the present application, each first battery cell 10 includes a second side wall 112 connected to a first side wall 111, and the second side wall 112 may be multiple, and each first battery cell 10 is thermally connected to an adjacent first battery cell 10 via at least one first side wall 111 and at least one second side wall 112.

[0137] In the above technical solution, each first battery cell 10 is configured to be thermally conductively connected to an adjacent first battery cell 10 through at least one first side wall 111 and at least one second side wall 112, so that each first battery cell 10 can transfer heat between the adjacent first battery cells 10 through at least one first side wall 111 and at least one second side wall 112, facilitating each first battery cell 10 to transfer heat to another first battery cell 10 through the first side wall 111 and the second side wall 112, for example, each first battery cell 10 can transfer heat to at least two adjacent first battery cells 10 through the first side wall 111 and the second side wall 112, thereby realizing the dispersed transfer of heat from each first battery cell 10, which is advantageous to effectively reduce the heat transfer peak power between the first battery cells 10 and improve the suppression effect on heat diffusion.

[0138] As can be understood, each first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 through at least one first side wall 111, and for one first side wall 111 for thermally connecting the first battery cells 10, at least one first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 through a corresponding first side wall 111, and / or at least one first battery cell 10 is thermally conductively connected to a plurality of adjacent first battery cells 10 through a corresponding first side wall 111. In this case, when a first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 through a plurality of first side walls 111, for example, the first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 through two first side walls 111, and each first side wall 111 is thermally conductively connected to one or more adjacent first battery cells 10.

[0139] For example, at least one first battery cell 10 is thermally connected to two adjacent first battery cells 10 via a single first side wall 111, and in this case, the two thermally connected side walls 111 may both be the first side wall 111, or may be the first side wall 111 and the second side wall 112, etc.

[0140] Similarly, each first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 via at least one second side wall 112, and for one second side wall 112 for thermally connecting the first battery cells 10, at least one first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 via a corresponding second side wall 112, and / or at least one first battery cell 10 is thermally conductively connected to a plurality of adjacent first battery cells 10 via a corresponding second side wall 112. In this case, when a first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 via a plurality of second side walls 112, for example, the first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 via two second side walls 112, and each second side wall 112 is thermally conductively connected to one or more adjacent first battery cells 10.

[0141] Illustratively, at least one first battery cell 10 is thermally connected to the first side wall 111 or the second side wall 112 of an adjacent first battery cell 10 via a single second side wall 112 .

[0142] For example, in the case where the first battery cell 10 is a rectangular parallelepiped and the plurality of first battery cells 10 of the battery unit 10A are arranged in order along the second direction Y, the first battery cell 10 includes two first side walls 111 arranged opposite to each other along the first direction X and two second side walls 112 arranged opposite to each other along the second direction Y, and each second side wall 112 is perpendicularly connected to the first side wall 111. Each first battery cell 10 of the two outermost first battery cells 10 of the battery unit 10A in the second direction Y is thermally connected to an adjacent first battery cell 10 via one second side wall 112. The remaining first battery cells 10 other than the two outermost first battery cells 10 of the battery unit 10A in the second direction Y are thermally connected to each other via one second side wall 112. As a result, each first battery cell 10 is thermally connected to two adjacent first battery cells 10 via two second side walls 112. In the example shown in the figure, for battery units 10A that are staggered in three or more rows, in the two outermost battery units 10A in the first direction X, the first battery cells 10 of each battery unit 10A are thermally connected to one or two adjacent first battery cells 10 via one first side wall 111, and the first battery cells 10 of the remaining battery units 10A other than the two outermost battery units 10A in the first direction X are thermally connected to the corresponding first battery cells 10 in the two adjacent rows of battery units 10A via the two first side walls 111. Of course, the angle between the second side wall 112 and the first side wall 111 is not limited to a right angle.

[0143] Further, for example, each battery unit 10A in each row includes three or more first battery cells 10, and the first battery cells 10 include a first side wall 111 and a second side wall 112 that form an angle, and the first side walls 111 of at least two adjacent rows of battery units 10A are installed opposite to each other in the first direction X, but are offset from each other, and a portion of the first side wall 111 of at least some of the first battery cells 10 is installed directly opposite to a portion of the first side wall 111 of the adjacent row, and The other part of the first side wall 111 of some of the first battery cells 10 is installed directly opposite the second side wall 112 of the adjacent row, and at this time, at least some of the first battery cells 10 may be thermally connected to two first battery cells 10 of the adjacent row through the first side wall 111, and may also be thermally connected to adjacent first battery cells 10 of the same row through the second side wall 112, making it easy to disperse and transfer heat caused by thermal runaway of the first battery cell 10 to at least three adjacent first battery cells 10.

[0144] 12, 15-17 and 20, in some embodiments of the present application, the battery 200 further includes a housing 30, and multiple rows of battery units 10A are provided in the housing 30, and the multiple first battery cells 10 of each row of battery units 10A are arranged in sequence along a second direction Y, and the second direction Y is parallel to the longitudinal direction of the housing 30.

[0145] In the above technical solution, the multiple first battery cells 10 of each row of battery units 10A are arranged in sequence along the second direction Y, and the second direction Y is installed parallel to the longitudinal direction of the housing 30, which makes it easy for the housing 30 to provide appropriate deployment space for the battery units 10A and facilitates installation of the battery units 10A.

[0146] 12, the length of the battery unit 10A in the second direction Y is greater than the width of the battery unit 10A in the first direction X, the second direction Y is parallel to the longitudinal direction of the housing 30, and the first direction X is parallel to the width direction of the housing 30, which makes it easy to properly match the arrangement of the multiple first battery cells 10 of the battery unit 10A and the arrangement of the multiple battery units 10A with the length and width of the housing 30, and makes it easy to provide sufficient arrangement space for the housing 30. Of course, in other examples, the first direction X may be parallel to the height direction of the housing 30.

[0147] 12, 15-17, and 20, in some embodiments of the present application, a partition plate 40 is provided in the housing 30 to define a plurality of storage chambers 30a, and at least two rows of battery units 10A are provided in each storage chamber 30a, with the battery units 10A being staggered. As can be understood, the number of battery units 10A provided in the plurality of storage chambers 30a may be equal to or different from each other, and the number of partition plates 40 may be one or more.

[0148] In the above technical solution, partition plates 40 are installed in the housing 30 to define multiple storage chambers 30a, and at least two rows of staggered battery units 10A are installed in each storage chamber 30a, making it easier to group and assemble the multiple first battery cells 10 of the battery 200 and improving the convenience of assembling the battery 200. At the same time, the partition plates 40 can provide a certain structural reinforcement to the housing 30, which is advantageous in improving the reliability of use of the housing 30.

[0149] For example, in the examples of FIGS. 12, 15-17, and 20, there are a plurality of partition plates 40, and the partition plates 40 are arranged at intervals along the first direction X, thereby defining a plurality of storage chambers 30a arranged in sequence along the first direction X, with a plurality of rows of battery units 10A provided in each storage chamber 30a, and any two adjacent rows of the plurality of rows of battery units 10A in each storage chamber 30a being arranged in staggered positions.

[0150] Of course, in other embodiments of the present application, the partition plate 40 may not be installed in the housing 30, and in this case, the number of the receiving chambers 30a may be one.

[0151] 12, 15-17, and 20, in some embodiments of the present application, the partition plate 40 is thermally conductively connected to the adjacent battery unit 10A, and heat exchange exists between the partition plate 40 and the adjacent battery unit 10A; the partition plate 40 is thermally conductively connected to the housing 30, and heat from the battery unit 10A may be transferred to the housing 30 via the partition plate 40.

[0152] As can be understood, for a single partition plate 40, the battery units 10A thermally connected to this partition plate 40 may be arranged in one row or multiple rows.

[0153] In the above technical solution, by installing the partition plate 40 so that it is thermally connected to the adjacent battery unit 10A, and by thermally connecting the partition plate 40 to the housing 30, the battery unit 10A located outermost in the first direction X can not only transfer its heat toward the battery unit 10A in the adjacent row, but also transfer it to the partition plate 40 and then to the housing 30, which further realizes the dispersed transfer of heat from the battery unit 10A and is advantageous to further improve the thermal management effect of the battery 200.

[0154] As can be understood, the position at which the partition plate 40 is thermally conductively connected to the housing 30 is not specifically limited in the present application. For example, at least one side surface of the partition plate 40 in the third direction Z is thermally conductively connected to a corresponding wall of the housing 30, and / or at least one side surface of the partition plate 40 in the second direction Y is thermally conductively connected to a corresponding wall of the housing 30, and the third direction Z is set perpendicular to the first direction X and the second direction Y, respectively.

[0155] As can be understood, the partition plate 40 being thermally conductively connected to an adjacent battery unit 10A may also refer to the partition plate 40 being thermally conductively connected to at least one first battery cell 10 of the adjacent battery unit 10A, and further, the partition plate 40 is thermally conductively connected to each first battery cell 10 in the adjacent battery unit 10A, so that the heat of each first battery cell 10 in the battery unit 10A adjacent to the partition plate 40 can not only be transferred toward the first battery cell 10 in the battery unit 10A in the adjacent row, but also to the partition plate 40 and then to the housing 30, which further realizes the dispersed transfer of heat of each first battery cell 10 in the battery unit 10A adjacent to the partition plate 40, and facilitates again improving the thermal management effect of the battery 200.

[0156] In some examples, a first thermally conductive adhesive is provided between the partition plate 40 and the adjacent battery unit 10A, and a second thermally conductive adhesive is provided between the partition plate 40 and the housing 30.

[0157] 4 to 8, 12, 14 to 17, and 20, in some embodiments of the present application, the first side walls 111 of any two adjacent rows of battery units 10A that are installed opposite each other are staggered, and any two adjacent rows of battery units 10A are staggered, where the two adjacent rows of battery units 10A are adjacent to each other in the first direction X, and no other battery units 10A are installed between the two rows of battery units 10A in the first direction X.

[0158] In the above technical solution, the opposing first side walls 111 of any two adjacent rows of battery units 10A are installed in a staggered position, which makes it easier for the heat generated by each first battery cell 10 to be directly and / or indirectly dispersed and transmitted to more adjacent first battery cells 10, and is advantageous in further improving the thermal management effect of the battery 200.

[0159] In some examples, the battery 200 includes multiple rows of battery units 10A arranged in sequence along the first direction X, each row of battery units 10A including multiple first battery cells 10, and any two adjacent rows of battery units 10A in the multiple rows of battery units 10A are staggered so that the first side walls 111 of any two adjacent battery units 10A that are opposite each other are staggered, and each first battery cell 10 in the battery 200 includes a second side wall 112 connected to the first side wall 111, and each first battery cell 10 is thermally conductively connected to an adjacent first battery cell 10 via at least one first side wall 111 and at least one second side wall 112.

[0160] In some examples, the battery 200 includes a housing 30 and a plurality of rows of battery units 10A arranged in order along a first direction X, the plurality of rows of battery units 10A are all provided within the housing 30, and each row of battery units 10A includes a plurality of first battery cells 10 arranged in order along a second direction Y, any two adjacent rows of battery units 10A in the plurality of rows of battery units 10A are installed with a staggered position, and the first side walls 111 installed opposite to each other in any two adjacent rows of battery units 10A are installed with a staggered position, the second direction Y is parallel to the longitudinal direction of the housing 30, and further, partition plates 40 are provided within the housing 30 to define a plurality of storage chambers 30a, and each storage At least two rows of battery units 10A are provided in the storage chamber 30a, and since any two adjacent rows of battery units 10A are installed with their positions shifted, two adjacent rows of battery units 10A in two adjacent storage chambers 30a are also installed with their positions shifted, and further, the partition plate 40 is thermally connected to the adjacent battery units 10A, and the partition plate 40 is thermally connected to the housing 30, and since any two adjacent rows of battery units 10A are installed with their positions shifted, when battery units 10A are provided on both opposing sides of the partition plate 40, the battery units 10A on both sides of the same partition plate 40 are also installed with their positions shifted.

[0161] 6-8 , in some embodiments of the present application, the first battery cells 10 installed in adjacent rows with offset positions are electrically connected via bus bars 50, and at least one first battery cell 10 of one of two adjacent rows of battery units 10A is electrically connected via the bus bars 50 to one or more first battery cells 10 installed in a corresponding offset position of the battery unit 10A in the other row, thereby realizing a series or parallel connection of the first battery cells 10 installed in adjacent rows with offset positions. In this case, the arrangement of the multiple first battery cells 10 of the battery unit 10A includes, but is not limited to, the arrangements shown in FIGS. 6-8 .

[0162] In the above technical solution, the bus bar 50 is installed so as to be connected to the first battery cells 10 that are installed in a staggered position in an adjacent row, and by setting the distance by which the positions of the two first battery cells 10 that are installed in a staggered position are shifted, it is easy to adapt to adjustments of the deployment length, deployment posture, etc. of the bus bar 50, which is advantageous in improving the flexibility of the deployment of the bus bar 50.

[0163] 6 and 7 , the poles 12 of the first battery cells 10 in adjacent rows are also staggered in the second direction Y, thereby providing an appropriate distance between the poles 12 of the first battery cells 10 in adjacent rows. At least a portion of the busbar 50 may extend in a direction inclined relative to the first direction X and the second direction Y. The oblique arrangement of at least a portion of the busbar 50 can reduce the length of the busbar 50, thereby reducing the overcurrent path and effectively reducing heat generation due to sustained overcurrent. This is beneficial for reducing the amount of heat generated and avoiding excessive energy loss and a relatively low energy utilization rate when the busbar 50 is overcurrent, thereby improving the energy utilization rate of the battery 200. As can be seen, the extension direction of at least a portion of the busbar 50 can be adjusted by adjusting the distance by which the first battery cells 10 in adjacent rows are staggered.

[0164] Furthermore, since the length of the bus bar 50 is relatively short, it is advantageous to reduce the volume of the bus bar 50, thereby saving the space occupied by the bus bar 50 and enabling compact deployment of the battery 200. This facilitates improving the space utilization rate of the battery 200 and reducing the weight of the battery 200, which is advantageous to improving the volumetric energy density and mass energy density of the battery 200.

[0165] In some examples, as shown in FIG. 6 , the first side walls 111 that are installed opposite each other in any two adjacent rows of battery units 10A in the battery 200 are installed in a staggered position, and the first battery cells 10 that are installed in a staggered position in every two adjacent rows are each electrically connected via a bus bar 50.

[0166] 6 to 11 , in some embodiments of the present application, the busbar 50 includes a transition portion 51 and two electrical connection portions 52, both ends of the transition portion 51 are respectively connected to the two electrical connection portions 52, the extension direction of the transition portion 51 and the first direction X and the second direction Y all form an angle, i.e., the transition portion 51 extends along directions that are inclined relative to the first direction X and the second direction Y, respectively, and both ends of the transition portion 51 in the extension direction may be respectively connected to the two electrical connection portions 52, i.e., one end of the transition portion 51 in the extension direction is connected to one of the electrical connection portions 52, and the other end of the transition portion 51 in the extension direction is connected to the other electrical connection portion 52, and the two electrical connection portions 52 are electrically connected to the two first battery cells 10, respectively.

[0167] In the above technical solution, the busbar 50 is arranged to include a transition portion 51 and two electrical connection portions 52, so that the extension direction of the transition portion 51 and the first direction X and the second direction Y all form an angle. The two electrical connection portions 52 are electrically connected to the two first battery cells 10, respectively. On the premise that the busbar 50 electrically connects the two first battery cells 10, the diagonal arrangement of the transition portion 51 of the busbar 50 is advantageous to shorten the length of the transition portion 51, thereby reducing the overcurrent path, effectively alleviating heat generation caused by sustained overcurrent, and reducing the amount of heat generated. At the same time, the relatively short span of the busbar 50 is advantageous to stagger the busbar 50 and the pressure relief structures 13 of the first battery cells 10, thereby reducing the probability that the busbar 50 will shield the pressure relief structures 13 and reducing safety risks.

[0168] It can be understood that when the busbar 50 includes a transition portion 51 and two electrical connection portions 52, the orthogonal projections of the two electrical connection portions 52 along the first direction X may be spaced apart, and the poles 12 of the two first battery cells 10 electrically connected to the two electrical connection portions 52 may also be staggered in the second direction Y, or spaced apart in the second direction Y. In this case, the two electrical connection portions 52 may be electrically connected to the poles 12 of the two first battery cells 10 on the same side in the second direction that are staggered in adjacent rows. This is advantageous for further shortening the span of the busbar 50 and for easily realizing staggered installation of the busbar 50 and the pressure relief structures 13 of the first battery cells 10, thereby further reducing the probability that the busbar 50 will shield the pressure relief structures 13.

[0169] For example, assuming that the second direction is the left-right direction, two first battery cells 10 in adjacent rows are installed with their positions shifted in the left-right direction, and each first battery cell 10 has two poles 12 installed at a distance along the left-right direction, and one electrical connection portion 52 of the bus bar 50 is electrically connected to the pole 12 on the left (or right) side of one of the two first battery cells 10 installed with their positions shifted in the adjacent row, and the other electrical connection portion 52 is electrically connected to the pole 12 on the left (or right) side of the other of the two first battery cells 10 installed with their positions shifted in the adjacent row.

[0170] For example, in the example of FIG. 7 , the battery 200 includes multiple rows of battery units 10A arranged in sequence in a first direction X, each row of the battery units 10A includes multiple first battery cells 10, the bus bar 50 includes a transition portion 51 and two electrical connection portions 52, and the outermost first battery cell 10 in the second direction of the battery unit 10A is electrically connected to the outermost first battery cell 10 in the second direction of the battery unit 10A of an adjacent row via the bus bar 50. Furthermore, the multiple first battery cells 10 of the battery units 10A in each column are arranged in sequence along the second direction Y, and each first battery cell 10 of the battery units 10A in each column is installed with a position offset from the corresponding one or two first battery cells 10 of the battery units 10A in the adjacent column, and any two adjacent first battery cells 10 of the battery units 10A in each column are electrically connected via the second bus bar 130, which can extend in a strip shape along the second direction.

[0171] 6 and 9-11, the battery 200 may include a plurality of rows of battery units 10A arranged in sequence in a first direction X, each row of the battery units 10A including a plurality of first battery cells 10, which are arranged in sequence along a second direction Y, and each first battery cell 10 of the battery units 10A of each row is offset from one or two corresponding first battery cells 10 of the battery units 10A of an adjacent row, and the busbar 50 includes a transition portion 51 and two electrical connection portions 52. In this case, each first battery cell 10 of each row of the battery units 10A arranged in a offset manner in the two adjacent rows is electrically connected to one or two first battery cells 10 arranged in a offset manner in the other row via the busbar 50.

[0172] As can be seen from the above, in the battery 200 of the embodiment of the present application, any two adjacent first battery cells 10 that are installed with their positions offset may be electrically connected via the bus bars 50, or only a portion of all the first battery cells 10 that are installed with their positions offset may be electrically connected via the bus bars 50.

[0173] Referring to FIGS. 6-12, in some embodiments of the present application, the transition section 51 is provided with a tensile deformable buffer section 53, that is, the buffer section 53 has a certain tensile deformation ability under the action of an external force.

[0174] In the above technical solution, by installing a tensile-deformable buffer portion 53 at the transition portion 51, the busbar 50 can relieve stress caused by the expansion of the first battery cell 10 during the use process of the battery 200 (e.g., in the later stages of use). The buffer portion 53 can generate a certain tensile deformation as the first battery cell 10 expands, thereby reducing the pulling force of the busbar 50 on the pole 12 of the first battery cell 10 and, at the same time, reducing the tensile force experienced by the busbar 50. This reduces the risk of the busbar 50 being pulled and breaking, and improves the reliability of use of the battery 200.

[0175] As can be understood, the specific position and number of the buffer section 53 in the transition section 51 may be specifically set according to actual needs. For example, the buffer section 53 may be provided at the end or middle section in the extension direction of the transition section 51, and the buffer section 53 may be one or more.

[0176] Referring to Figures 9-12, in some embodiments of the present application, a tensile-deformable buffer portion 53 is connected between each electrical connection portion 52 and the transition portion 51, i.e., each electrical connection portion 52 is connected to the transition portion 51 via the buffer portion 53.

[0177] In the above technical solution, the buffer portions 53 are installed between each electrical connection portion 52 and the transition portion 51, which facilitates multiple relaxation of stress caused by the expansion of the first battery cell 10, improves the adaptability of the busbar 50 to the expansion and deformation of the first battery cell 10, and is advantageous in further improving the performance of the battery 200.

[0178] 9-11 , for example, one buffer portion 53 is provided between each electrical connection portion 52 and the transition portion 51, and at least one of the two buffer portions 53 may be configured to be tensile deformable mainly along the first direction X, thereby further improving the absorption of forces received by the busbar 50 due to the expansion of the first battery cell 10. For example, one of the buffer portions 53 may be tensile deformable mainly along the first direction X, and the other buffer portion 53 may be tensile deformable mainly along the second direction Y, thereby absorbing forces received by the busbar 50 in multiple directions (including, but not limited to, the first direction X and the second direction Y, and may include, for example, directions oblique to the first direction X and the second direction Y), which is advantageous to effectively improving the adaptability of the busbar 50.

[0179] Of course, the structure of the buffer section 53 is not limited to this, and the buffer section 53 may be configured to be tensile deformable along multiple directions, in which case it is advantageous to appropriately reduce the number of buffer sections 53.

[0180] 9-11, in some embodiments of the present application, the buffer portion 53 includes at least a folded portion 531 having an opening 530 therein.

[0181] In the above technical solution, the buffer part 53 is configured to include at least a bending part 531 having an opening 530, so that the bending part 531 can change the width of the opening 530 under the action of external force to alleviate the force, and the bending part 531 has a simple structure and is easy to process.

[0182] For example, the bent portion 531 includes a first segment and a second segment, one end of the first segment is connected to one end of the second segment, and the other end of the first segment and the other end of the second segment are spaced apart to define the opening 530. Here, the specific shapes of the first segment and the second segment are not particularly limited, and for example, the first segment and the second segment may be flat plates, curved plates, or the like, and the bent portion 531 may be substantially U-shaped, V-shaped, C-shaped, or Ω-shaped, or the like.

[0183] Exemplarily, the buffer section 53 is provided in the transition section 51, the transition section 51 including a first transition segment and a second transition segment, one of the other end of the first segment 5311 and the other end of the second segment 5312 is connected to the first transition segment and the other is connected to the second transition segment, the first transition segment is connected to one of the electrical connection sections 52, and the second transition segment is connected to the other electrical connection section 52. Exemplarily, the buffer section 53 is connected between each electrical connection section 52 and the transition section 51, and for each electrical connection section 52, one of the other end of the first segment 5311 and the other end of the second segment 5312 is connected to the transition section 51 and the other is connected to the electrical connection section 52.

[0184] As can be appreciated, the cross-sectional shape of the folded portion 531 may be generally open annular, and "annular" should be understood broadly to include, but is not limited to, circular annular shapes, elliptical annular shapes, polygonal rings, and the like.

[0185] Referring to FIG. 11, in some embodiments of the present application, the transition section 51 is provided with a reinforcing member 54, which is a conductive material member.

[0186] In the above technical solution, by installing a reinforcing member 54 made of a conductive material at the transition section 51, the overcurrent area of ​​the transition section 51 can be increased and the overcurrent capacity of the busbar 50 can be improved, thereby further reducing the temperature rise caused by the overcurrent and improving the performance of the battery 200.

[0187] As can be appreciated, the materials of the reinforcing member 54 and the transition portion 51 can be the same or different, and illustratively, the reinforcing rib and the transition portion 51 are both metal members.

[0188] Referring to FIG. 11 , in some embodiments of the present application, the reinforcing member 54 and the transition portion 51 are installed in a stacked manner, and in this case, the reinforcing member 54 and the transition portion 51 may be stacked along the thickness direction of the busbar 50, and the orthogonal projection of the reinforcing member 54 along the thickness direction of the busbar 50 at least partially overlaps with the orthogonal projection of the transition portion 51 along the thickness direction of the busbar 50.

[0189] In the above technical solution, the reinforcing member 54 and the transition portion 51 are configured to be stacked, so that the busbar 50 has a substantially stacked design, and the thickness of the region of the busbar 50 corresponding to the transition portion 51 can be appropriately increased, thereby improving the overcurrent capacity of the busbar 50 and at the same time reducing the space occupied by the busbar 50 in the first direction X and the second direction Y. The number of layers of the busbar 50 can be specifically configured according to actual needs. For example, the busbar 50 may have one reinforcing member 54 and the reinforcing member 54 and the transition portion 51 are stacked together, so that the busbar 50 has a substantially two-layer design; or the busbar 50 may have multiple reinforcing members 54 and the multiple reinforcing members 54 are stacked together and the multiple reinforcing members 54 and the transition portion 51 are stacked together.

[0190] As can be understood, the reinforcing member 54 may be directly connected to the electrical connection portion 52, or may be connected to the electrical connection portion 52 via an overcurrent portion, and the embodiments of the present application do not specifically limit the specific shapes of the reinforcing member 54 and the transition portion 51. In the thickness direction of the busbar 50, the orthogonal projection of the reinforcing member 54 may be completely located within the outer contour of the orthogonal projection of the transition portion 51, or in the thickness direction of the busbar 50, a portion of the orthogonal projection of the reinforcing member 54 may be located outside the outer contour of the orthogonal projection of the transition portion 51. In addition, the reinforcing member 54 may be stacked on one side of the transition portion 51 facing the first battery cell 10, or on one side of the transition portion 51 away from the first battery cell 10.

[0191] Illustratively, the transition portion 51, the electrical connection portion 52, the buffer portion 53, and the reinforcing member 54 are integrally molded members, and the bus bar 50, for example, may be a folded molded member.

[0192] 12, 13, 20, and 21, in some embodiments of the present application, a battery 200 further includes a housing 30, and multiple rows of battery units 10A are arranged in the housing 30. Displaced spaces 30b are provided between adjacent rows of battery units 10A that are staggered and the inner wall of the housing 30, and fillers 60 are provided in the displaced spaces 30b. In this case, the arrangement of the multiple first battery cells 10 of the battery unit 10A includes, but is not limited to, the arrangements shown in FIGS. 4 to 8.

[0193] As can be seen from the above, for the battery units 10A in adjacent rows that are staggered, at least one end in the second direction Y of the battery units 10A in at least one row exceeds the battery units 10A in the other row, so that the battery units 10A in this adjacent row fit together to define the staggered space 30b with the housing 30. For example, for the battery units 10A in adjacent rows that are staggered, one end in the second direction Y of the battery units 10A in one row exceeds the battery units 10A in the other row, and the other end in the second direction Y of the battery units 10A in this one row is installed flush with the battery units 10A in the other row, and in this case, the staggered space 30b is provided on one side of the two rows of battery units 10A in the second direction Y, or one end in the second direction Y of the battery units 10A in one row exceeds the battery units 10A in the other row. The other ends of the battery units 10A in the second direction Y of the other row of battery units 10A exceed the battery units 10A in one of the rows, and at this time, offset spaces 30b are provided on both sides of the two rows of battery units 10A in the second direction Y, or both ends of the battery units 10A in one of the rows of battery units 10A in the second direction Y exceed the battery units 10A in the other row, and at this time, offset spaces 30b are provided on both sides of the two rows of battery units 10A in the second direction Y.

[0194] In the above technical solution, a staggered space 30b is provided between the staggered battery units 10A of adjacent rows and the inner wall of the housing 30, and a filler 60 is installed in the staggered space 30b, thereby effectively reducing the space loss caused by the staggered installation of the battery units 10A of adjacent rows, and rationally utilizing the battery 200 to design the remaining space, thereby improving the space utilization rate of the battery 200.

[0195] 6 , 7 , 12 , and 13 , each battery unit 10A includes a plurality of first battery cells 10, each of which includes a second side wall 112 connected to a first side wall 111. A staggered space 30b is provided between the exposed second side wall 112 of one battery unit 10A in adjacent rows of battery units 10A that are staggered and the inner wall of the housing 30, and between the exposed first side wall 111 of the other battery unit 10A in adjacent rows of battery units 10A that are staggered. For three or more rows of battery units 10A that are staggered, the staggered space 30b may be provided between the exposed first side walls 111 of two of the rows and the exposed second side walls 112 of the remaining row and the inner wall of the housing 30. In this case, each first battery cell 10 may be thermally conductively connected to an adjacent first battery cell 10 via at least one first side wall 111 and at least one second side wall 112.

[0196] As can be understood, when the battery 200 further includes a partition plate 40, a plurality of storage chambers 30a are defined within the housing 30, and at least two rows of battery units 10A are provided in each storage chamber 30a, and when a battery unit 10A is installed adjacent to the partition plate 40 and the battery unit 10A is installed in a position offset from the battery units 10A in the adjacent row, an offset space 30b may be provided between the two adjacent rows of battery units 10A, the inner wall of the housing 30, and the corresponding partition plate 40.

[0197] 14 , in some embodiments of the present application, the filler 60 includes a second battery cell 61, which is disposed in the offset space 30b, and which is electrically connected to the first battery cell 10, and both the second battery cell 61 and the first battery cell 10 have the function of storing energy, and both the second battery cell 61 and the first battery cell 10 can be used to provide electrical energy. For example, the specifications of the second battery cell 61 may be different from those of the first battery cell 10.

[0198] In the above technical solution, by arranging the second battery cell 61 in the offset space 30b, the offset space 30b created by the offset installation of the multiple first battery cells 10 can be effectively utilized, which is advantageous in improving the space utilization rate (or volume utilization rate) of the battery 200 and improving the volumetric energy density and weight energy density of the battery 200.

[0199] Illustratively, the shape and size of the second battery cell 61 matches the shape and size of the corresponding offset space 30b.

[0200] For example, in the examples of Figures 2 and 14, the side walls of the first battery cell 10 and the second battery cell 61 in the third direction are fixed to the inner wall of the housing 30, and the third direction is the up-down direction. Electrode posts 12 are provided on the top walls of the first battery cell 10 and the second battery cell 61, respectively, and the bottom wall of the first battery cell 10 is fixed to the inner wall of the housing 30, for example, by adhesive bonding with a structural adhesive, and the bottom wall of the second battery cell 61 is fixed to the inner wall of the housing 30, for example, by adhesive bonding with a structural adhesive. This improves the connection strength between the first battery cell 10 and the second battery cell 61 and the housing 30, and is advantageous for improving the structural stability of the entire battery 200.

[0201] Referring to FIG. 14, in some embodiments of the present application, the volume of the second battery cell 61 is smaller than the volume of the first battery cell 10 .

[0202] In the above technical solution, the volume of the second battery cell 61 is set to be smaller than the volume of the first battery cell 10, which is advantageous in matching the volume of the second battery cell 61 with the volume of the offset space 30b. Since the offset space 30b is formed by fitting between the battery units 10A of an adjacent row that are installed in an offset position and the housing 30, the volume of the offset space 30b is generally smaller than the volume of the first battery cell 10, which makes it easier to improve the matching between the second battery cell 61 and the offset space 30b and facilitates the deployment of the second battery cell 61.

[0203] Furthermore, by installing the second battery cell 61 in the offset space 30b, it is advantageous to reduce the distance between the end where the second battery cell 61 of the group of batteries 200 consisting of one row of the second battery cell 61 is installed and the end corresponding to the offset space 30b of the other row of battery units 10A, which is advantageous in reducing the requirements for the inner wall structure of the housing 30 and makes it easier to install the inner wall of the housing 30 flat.

[0204] Illustratively, the shape of the second battery cell 61 matches the shape of the offset space 30b, for example, the second battery cell 61 and the offset space 30b both have a rectangular parallelepiped structure. Illustratively, the second battery cell 61 and the first battery cell 10 both have a rectangular parallelepiped structure, the volume of the second battery cell 61 is essentially the product of the length, width, and height of the second battery cell 61, and the volume of the first battery cell 10 is essentially the product of the length, width, and height of the first battery cell 10.

[0205] 14 , in some embodiments of the present application, the side wall 11 of the second battery cell 61 is flush with the end face of the battery unit 10A in the adjacent row in the second direction Y. "Flush" includes, but is not limited to, the two surfaces being located on the same plane.

[0206] In the above technical solution, the side wall 11 of the second battery cell 61 is installed flush with the end face of the battery unit 10A in the adjacent row in the second direction Y, thereby making it possible to arrange the group of batteries 200 consisting of the battery units 10A parallel to the second battery cell 61 and the adjacent battery units 10A in a regular manner, which is advantageous for simplifying the shape of the internal space of the housing 30 and making rational use of the internal space of the housing 30.

[0207] For example, in the example of Figure 14, the first battery cell 10 and the second battery cell 61 both have a rectangular parallelepiped structure, and an offset space 30b is provided on both sides in the second direction Y of the battery units 10A in an adjacent row that are installed with their positions offset. A second battery cell 61 is provided in each offset space 30b, and the installation of each second battery cell 61 is advantageous in that one end in the second direction Y of the battery group 200 composed of this second battery cell 61 and the parallel battery unit 10A is installed flush with one end corresponding to the first offset space 30b of the battery units 10A in another row, which is advantageous in simplifying the structure of the inner walls of the housing 30. For example, assuming that the second direction Y is the left-right direction, offset spaces 30b are provided on both sides in the left-right direction of the battery units 10A in an adjacent row that are installed with their positions offset, and a second battery cell 61 is installed in each offset space 30b, with installing the second battery cell 61 on the left side being advantageous for making the left side wall 11 of this second battery cell 61 flush with the left end face of the battery unit 10A in the other row, and installing the second battery cell 61 on the right side being advantageous for making the right side wall 11 of this second battery cell 61 flush with the right end face of the battery unit 10A in the other row.

[0208] Referring to FIG. 14, in some embodiments of the present application, the first battery cell 10 and the second battery cell 61 are electrically connected at least in a series connection manner, and the chemical systems of the second battery cell 61 and the first battery cell 10 are different.

[0209] Alternatively, if there is one second battery cell 61, the second battery cell 61 is connected in series with the corresponding first battery cell 10, or if there is one second battery cell 61, the second battery cell 61 is connected in series with at least one first battery cell 10 and in parallel with at least one first battery cell 10. If there are multiple second battery cells 61, the electrical connection manners of the multiple second battery cells 61 may be the same or different, and for a single second battery cell 61, the second battery cell 61 and the first battery cell 10 are electrically connected at least in a serial connection manner.

[0210] In the above technical solution, the second battery cell 61 and the first battery cell 10 are configured to have different chemical systems, which makes it easy to make the performance of the second battery cell 61 and the first battery cell 10 different. The first battery cell 10 and the second battery cell 61 are electrically connected at least in a series connection manner, which is advantageous to improving the performance of the entire battery 200 by using the second battery cell 61, for example, by selecting an appropriate chemical system for the second battery cell 61 to have a higher low-temperature discharge specific power density than the first battery cell 10. The above connection manner of the second battery cell 61 can improve the low-temperature discharge capacity of the battery 200, and at the same time, it is advantageous to simplify the electrical connection manner of the battery 200 and simplify the structural design of the battery 200.

[0211] As can be appreciated, battery cell chemistries include, but are not limited to, lithium iron phosphate, ternary lithium, and lithium manganese oxide.

[0212] Illustratively, the low-temperature discharge specific power density of the second battery cell 61 is higher than that of the first battery cell 10. For example, the discharge specific power density P2 of the second battery cell 61 at −25° C. and 100% state of charge (SOC) is higher than the discharge specific power density P1 of the first battery cell 10. For example, the specific power density at 25° C. and 100% state of charge (SOC) is the ratio of the discharge power of the battery cell at 25° C. and 100% SOC to the nominal capacity of the battery cell, and is expressed in W / Ah. The specific power density at 25° C. and 10% state of charge (SOC) is the ratio of the discharge power of the battery cell at 25° C. and 10% SOC to the nominal capacity of the battery cell, and is expressed in W / Ah.

[0213] For example, the first battery cell 10 and the second battery cell 61 satisfy at least one of the following conditions to give the second battery cell 61 better low-temperature performance, thereby improving the low-temperature discharge capability of the battery 200: Condition 1: The resistance per unit area Rc2 of the positive electrode plate of the second battery cell 61 is lower than the resistance per unit area Rc1 of the positive electrode plate of the first battery cell 10 and is 0.05 Ω / cm 2 ≦Rc2 <Rc1≦10Ω / cm 2 Condition 2: the resistance per unit area Ra2 of the negative electrode plate of the second battery cell 61 is lower than the resistance per unit area Ra1 of the negative electrode plate of the first battery cell 10 and is 0.05 Ω / cm 2 ≦Ra2 <Ra1≦10Ω / cm 2where condition 3: the air permeability G2 of the separator of the second battery cell 61 is lower than the air permeability G1 of the separator of the first battery cell 10, and 180 s / 100 cc ≤ G2 < G1 ≤ 400 s / 100 cc is satisfied; condition 4: the ionic conductivity σ1 of the electrolyte of the first battery cell 10 at -25 °C is lower than the ionic conductivity σ2 of the electrolyte of the second battery cell 61, and 1 mS / cm ≤ σ1 < σ2 ≤ 20 mS / cm; condition 5: the positive electrode plate of the first battery cell 10 contains a first active material, and the first active material contains at least one of lithium iron phosphate (LFP), lithium cobaltate (LCO), lithium nickel cobalt manganese oxide (NCM), and lithium nickel cobalt aluminum oxide (NCA), and the positive electrode plate of the second battery cell 61 contains a second active material, and the second active material contains at least one of NaMO2 (M = Ni, Co, Mn, Fe, V), NaMPO4 (M = Fe, Mn, Mg, Ca, V), Na x M[Fe(CN)6] (x = 1 to 2, M = Fe, Mn, Co); condition 6: the negative electrode plate of the first battery cell 10 contains a third active material, and the third active material contains at least one of artificial graphite, natural graphite, mesocarbon microbeads, silicon monoxide, silicon carbide, lithium titanate, hard carbon, and soft carbon, and the negative electrode plate of the second battery cell 61 contains a fourth active material, and the fourth active material contains at least one of hard carbon and soft carbon.

[0214] Optionally, for the first battery cell 10, the positive electrode active material uses an NCM active material, the negative electrode active material is artificial graphite, the separator is a porous polyethylene separator, the electrolyte lithium salt is LiPF6, the solvent is EC, DMC, and EMC. In the second battery cell61, the positive electrode active material uses NaFe[Fe(CN)6], the negative electrode active material is hard carbon, the separator is a porous polyethylene separator, the electrolyte lithium salt is NaPF6, and the solvent is EC, DMC, and EMC.

[0215] Referring to FIG. 15, in some embodiments of the present application, the filler 60 includes a monitor 62 for detecting the operating state of each first battery cell 10.

[0216] In the above technical solution, the filler 60 is configured to include a monitor 62, and the monitor 62 is used to detect the operating status of each first battery cell 10, thereby facilitating the installation of the monitor 62 and simultaneously improving the operating safety of the battery 200.

[0217] For example, the monitor 62 includes at least one of an air pressure sensor 621, a gas analysis sensor, and a lithium deposition monitor 622. For example, the monitor 62 monitors the operating state of each first battery cell 10 of at least one row of battery units 10A via a sensing line, and the operating state of the first battery cell 10 includes, but is not limited to, the positive and negative electrode voltages of the first battery cell 10, the position of the pressure relief structure 13, etc., thereby realizing monitoring of the performance and safety of the first battery cell 10.

[0218] Alternatively, the monitor 62 may be fixed by welding to at least one of the housing 30 and the corresponding first battery cell 10, and / or the monitor 62 may be interposed between two opposing first battery cells 10 and fixed by the biasing force between the two first battery cells 10.

[0219] In some examples, the filler 60 includes a second battery cell 61 and a monitor 62, where the second battery cell 61 and the monitor 62 may be located within the same offset space 30b or may be located in different offset spaces 30b.

[0220] 16 and 17, in some embodiments of the present application, the filler 60 includes a filled thermally conductive member 63 that is thermally conductively connected to the housing 30, and the filled thermally conductive member 63 is used to conduct heat from the corresponding first battery cell 10 to the housing 30.

[0221] In the above technical solution, the filler 60 is configured to include a filled thermal conductive member 63, and the filled thermal conductive member 63 is used to conduct the heat of the corresponding first battery cell 10 to the housing 30, thereby further improving the heat dissipation and transmission of the first battery cell 10 and thereby further suppressing heat diffusion.

[0222] As can be understood, the filled heat conduction member 63 and the housing 30 are thermally conductively connected, and the position at which the filled heat conduction member 63 is thermally conductively connected to the housing 30 is not specifically limited in the present application, for example, at least one side surface of the filled heat conduction member 63 in the third direction Z is thermally conductively connected to the corresponding wall of the housing 30, and / or one side surface of the filled heat conduction member 63 in the second direction Y is thermally conductively connected to the corresponding wall of the housing 30.

[0223] For example, in the examples of FIGS. 3, 16, and 17, each row of battery units 10A includes a plurality of first battery cells 10, and each first battery cell 10 includes a second side wall 112 connected to a first side wall 111. Displaced spaces 30b are provided between the exposed second side wall 112 of one row of battery units 10A and the exposed first side wall 111 of the other row of adjacent rows of battery units 10A that are staggered, and the second side wall 111 that is involved in defining the corresponding displaced spaces 30b. For a battery unit 10A that is installed in three or more rows with its positions offset, and that is thermally conductively connected to at least one of the exposed first side walls 111 and the exposed second side wall 112 of two rows of the battery unit 10A and that is installed in a staggered manner, staggered spaces 30b may be provided between the inner wall of the housing 30 and the exposed first side walls 111 of the two rows of the battery unit 10A and the exposed second side walls 112 of the remaining row of the battery unit 10A, and the filled thermally conductive member 63 may be thermally conductively connected to at least one of the two first side walls 111 and the two second side walls 112 that are involved in defining the corresponding staggered spaces 30b. In this case, each first battery cell 10 may be thermally conductively connected to an adjacent first battery cell 10 via at least one first side wall 111 and at least one second side wall 112.

[0224] 16 and 17, the filler thermally conductive members 63 in at least two offset spaces 30b located on the same side of the battery 200 in the second direction are integrally molded members. Furthermore, in the illustrated example, a partition member 40 is provided in the housing 30 to define a plurality of accommodating chambers 30a in the housing 30, three or more rows of battery units 10A are provided in at least one accommodating chamber 30a, a plurality of offset spaces 30b are respectively provided on one or both sides in the second direction of the at least one accommodating chamber 30a, a filler thermally conductive member 63 is respectively provided in at least two of the plurality of offset spaces 30b, and the filler thermally conductive members 63 in the at least two offset spaces 30b are integrally molded members.

[0225] In some examples, the filler 60 includes a second battery cell 61 and a filled thermally conductive member 63, and at this time, the second battery cell 61 and the filled thermally conductive member 63 may be located in the same offset space 30b or may be provided in different offset spaces 30b, and in some examples, the filler 60 includes a monitor 62 and a filled thermally conductive member 63, and at this time, the monitor 62 and the filled thermally conductive member 63 may be located in the same offset space 30b or may be provided in different offset spaces 30b, and in some examples, the filler 60 includes a second battery cell 61, a monitor 62, and a filled thermally conductive member 63.

[0226] 18-20 , in some embodiments of the present application, the battery 200 further includes a thermally conductive reinforcing member 70 and a housing 30, at least two first battery cells 10 are disposed in the housing 30, and at least one first battery cell 10 is thermally conductively connected to the thermally conductive reinforcing member 70, which is thermally conductively connected to the housing 30. In this case, when the battery 200 includes multiple rows of battery units 10A, the arrangement of the multiple first battery cells 10 of the battery units 10A includes, but is not limited to, the arrangement shown in FIGS. 4-8 . When the battery 200 includes a housing 30, if staggered spaces 30b are provided between the battery units 10A of adjacent rows that are staggered and the inner wall of the housing 30, a filler 60 may or may not be provided in the staggered spaces 30b.

[0227] In the above technical solution, the thermally conductive reinforcing member 70 is thermally connected to at least one first battery cell 10 and is also thermally connected to the housing 30. This allows the thermally conductive reinforcing member 70 to conduct heat from the at least one first battery cell 10 to the housing 30, thereby further improving the heat dissipation and transfer of the first battery cell 10 and further suppressing heat diffusion. At the same time, the thermally conductive reinforcing member 70 can provide a certain structural reinforcement for the first battery cell 10 and / or the housing 30, which is beneficial to improving the reliability of use of the battery 200.

[0228] Optionally, the thermally conductive reinforcing member 70 has a first side and a second side, the first side and the second side being respectively located on different sides of the thermally conductive reinforcing member 70, the first side being thermally conductively connected to the first battery cell 10, and the second side being thermally conductively connected to the housing 30, making it easy to adapt the thermally conductive reinforcing member 70 to the arrangement of the first battery cell 10 and the housing 30.

[0229] Optionally, the battery 200 includes multiple rows of battery units 10A, each row of the battery units 10A including multiple first battery cells 10, the multiple rows of battery units 10A being arranged in sequence in the first direction X, and the thermally conductive reinforcing member 70 being thermally conductively connected to at least one first battery cell 10 of at least one row of the battery units 10A.

[0230] Alternatively, the thermally conductive reinforcing member 70 may be fixedly connected to the housing 30, for example, by welding the thermally conductive reinforcing member 70 to the housing 30, although the thermally conductive reinforcing member 70 may also be connected to the housing 30 in other ways.

[0231] 15 to 20 , in some embodiments of the present application, the thermally conductive reinforcing member 70 is sandwiched between first battery cells 10 that are arranged opposite each other in the first direction X, and the thermally conductive reinforcing member 70 is thermally conductively connected to the first side wall 111 of the corresponding first battery cell 10.

[0232] In the above technical solution, the thermally conductive reinforcing member 70 is installed to be thermally conductively connected to the first side wall 111 of the opposing first battery cell 10 along the first direction X, thereby increasing the heat exchange area between the thermally conductive reinforcing member 70 and the corresponding first battery cell 10, thereby improving the heat transfer efficiency between the thermally conductive reinforcing member 70 and the first battery cell 10 and improving the temperature control effect of the battery 200. The thermally conductive reinforcing member 70 can also provide a certain reinforcement to the first side wall 111 of the corresponding first battery cell 10, thereby increasing the deformation resistance ability of the first side wall 111 of the corresponding first battery cell 10, and thereby reducing the likelihood of the first battery cell 10 being subjected to uneven forces, which is prone to problems such as localized lithium deposition and thermal runaway.

[0233] As can be seen, one or more first battery cells 10 located on the same side of the thermal conduction reinforcing member 70 in the first direction X are thermally connected to the thermal conduction reinforcing member 70 .

[0234] Optionally, the battery 200 includes multiple rows of battery units 10A sequentially arranged in the first direction X, each row of battery units 10A including multiple first battery cells 10, a thermally conductive reinforcing member 70 sandwiched between two adjacent rows of battery units 10A, and the thermally conductive reinforcing member 70 thermally conductively connected to a first side wall 111 of at least one first battery cell 10 of the battery units 10A in each row. Furthermore, the battery unit 10A includes multiple first battery cells 10 sequentially arranged along the second direction Y, and the thermally conductive reinforcing member 70 thermally conductively connected to a first side wall 111 of each first battery cell 10 in each row of the two adjacent rows of battery units 10A.

[0235] Of course, in other embodiments, the thermally conductive reinforcing member 70 may be further thermally conductively connected to the other side wall 11 of the corresponding first battery cell 10, or the thermally conductive reinforcing member 70 may be installed between the inner wall of the housing 30 and the battery unit 10A.

[0236] 18 and 19, in some embodiments of the present application, a cavity 70a for buffering stress is provided in the thermally conductive reinforcing member 70, whereby the cavity 70a is configured to be deformable when the thermally conductive reinforcing member 70 is subjected to pressure, thereby buffering stress.

[0237] In the above technical solution, a stress-relieving cavity 70a is provided in the thermally conductive reinforcement member 70. When the first battery cell 10 expands during use, the provision of the cavity 70a allows the thermally conductive reinforcement member 70 to deform when subjected to the force of the first battery cell 10. This reduces the compressive force between the thermally conductive reinforcement member 70 and the first battery cell 10, preventing damage to the thermally conductive reinforcement member 70 and the first battery cell 10 and improving the reliability of the thermally conductive reinforcement member 70 and the first battery cell 10. At the same time, the provision of the cavity 70a can accommodate the assembly tolerances of the first battery cells 10 per row during the assembly process of the thermally conductive reinforcement member 70 and the first battery cell 10, improving the convenience of assembly of the thermally conductive reinforcement member 70 and the first battery cell 10. The provision of the cavity 70a is also beneficial for reducing the weight of the thermally conductive reinforcement member 70, thereby reducing the weight of the battery 200 and improving the weight-energy density of the battery 200.

[0238] 18 and 19, in some embodiments of the present application, the thermally conductive reinforcing member 70 includes two thermally conductive side walls 71 arranged opposite each other, and the thermally conductive side walls 71 are thermally conductively connected to the opposing first side wall 111, and support structures 80 connected to the two thermally conductive side walls 71 are provided within the cavity 70a.

[0239] In the above technical solution, a support structure 80 is installed in the cavity 70a, each connected to two heat-conducting side walls 71, so that the support structure 80 can support the two heat-conducting side walls 71, thereby increasing the bending deformation resistance ability of the heat-conducting reinforcing member 70 and improving the reliability of the heat-conducting reinforcing member 70.

[0240] For example, the two heat-conducting side walls 71 of the heat-conducting reinforcing member 70 are arranged opposite each other along the first direction X, the cavity 70a is located between the two heat-conducting side walls 71, and each heat-conducting side wall 71 extends along the second direction Y. The heat-conducting reinforcing member 70 has a simple structure and is easy to process.

[0241] 18 and 19, in some embodiments of the present application, the support structure 80 is formed into a mesh structure, and the inside of the mesh structure is filled with a heat absorbing material member 90, which is also provided within the cavity 70a.

[0242] In the above technical solution, the support structure 80 is arranged to form a mesh structure, and the heat-absorbing material element 90 is arranged in the cavity 70a, which can easily reduce the obstruction of the support structure 80 to the heat-absorbing material element 90, which is advantageous to improve the filling ability of the heat-absorbing material element 90 into the cavity 70a, and make it easier for the heat-absorbing material element 90 to come into contact with the heat-conducting side wall 71, which is advantageous to improve the heat-conducting ability. At the same time, it is advantageous to avoid excessive increase in the weight of the support structure 80 and the heat-conducting reinforcing element 70, which is advantageous to reduce the requirements for the material state of the heat-absorbing material element 90, and can also reduce the requirements for the material state change of the heat-absorbing material element 90 when a material state change occurs during the heat-absorbing process.

[0243] Optionally, the heat absorbing material element 90 includes at least one of paraffin, fatty acid, and polyethylene.

[0244] Optionally, the heat-absorbing material member 90 is a phase-change heat-absorbing material member, such as a solid-liquid phase-change material member, and at high temperatures the phase-change heat-absorbing material member 90 undergoes a solid-liquid phase change and simultaneously absorbs heat, thereby further improving the heat absorption and heat conduction capabilities of the heat-conducting reinforcing member 70, reducing the heat transferred from the first battery cell 10 to another first battery cell 10 facing it along the first direction X, further suppressing heat diffusion, and improving the safety of the battery 200.

[0245] Optionally, a plurality of spaced-apart subchambers may be defined between the support structure 80 and each heat-conducting side wall 71, with adjacent subchambers communicating with each other. The heat-absorbing material members 90 may be provided in the plurality of subchambers, so that the support structure 80 can provide a certain support for each heat-conducting side wall 71, and at the same time, the distance between the two heat-conducting side walls 71 can be changed under the action of external force, thereby achieving a better balance between stress buffering and bending resistance.

[0246] Further optionally, the cross section of each subchamber in a cross section parallel to the first direction X and the second direction Y is triangular, which makes it easier to ensure that the support structure 80 provides adequate support to the two heat conducting side walls 71. Illustratively, a subchamber defined between the support structure 80 and one of the heat conducting side walls 71 is referred to as a first subchamber, and a subchamber defined between the support structure 80 and the other heat conducting side wall 71 is referred to as a second subchamber, with the cross sections of both the first subchamber and the second subchamber being triangular, and the plurality of first subchambers and the plurality of second subchambers being alternately arranged one-to-one along the second direction Y. Of course, the cross-sectional shape of the subchambers is not limited thereto.

[0247] In other embodiments, the heat absorbing material element 90 may be replaced by a heat conducting material element. Additionally, in some embodiments, the heat absorbing material element 90 may be disposed within the cavity 70a, and the support structure 80 may not be disposed.

[0248] 22 and 23 , in some embodiments of the present application, the battery 200 further includes a heat exchange plate 100 and a thermally conductive insert member 110, where the heat exchange plate 100 is located on one side of at least two first battery cells 10 in the third direction Z, and the third direction Z is installed perpendicular to the first direction X and the second direction Y, respectively. A heat exchange passage 100a is provided in the heat exchange plate 100 for distributing a heat exchange medium. The insert member 110 is provided on a surface of the heat exchange plate 100 adjacent to the first battery cells 10, and the insert member 110 is thermally conductively connected to the first battery cells 10. In this case, if the battery 200 includes multiple rows of battery units 10A, the arrangement of the multiple first battery cells 10 in the battery units 10A includes, but is not limited to, the arrangements shown in FIGS. 4 to 8.

[0249] In the above technical solution, a heat exchange plate 100 and an insert member 110 are installed, and a heat exchange passage 100a for distributing a heat exchange medium is provided within the heat exchange plate 100. The insert member 110 is thermally connected to the first battery cell 10, and the heat exchange plate 100 can exchange heat with the first battery cell 10 at least through the insert member 110, thereby further reducing the heat transferred from the first battery cell 10 to other first battery cells 10 and thereby further suppressing heat diffusion. For example, the heat exchange plate 100 and the insert member 110 can transfer heat from the first battery cell 10 that has experienced thermal runaway. Of course, in operating conditions such as 4C fast charging, the heat from the first battery cell 10 can be carried away by the heat exchange plate 100 and the insert member 110.

[0250] For example, assuming that the third direction Z is the up-down direction, the heat exchange plate 100 is located below the plurality of first battery cells 10, and there are one or more insert members 110. The insert member 110 is provided on the upper surface of the heat exchange plate 100 and is thermally conductively connected to the plurality of first battery cells 10. At this time, the heat exchange plate 100 may be fixed, for example, adhesively fixed, to the bottom wall of the housing 30. Of course, the insert member 110 may also be thermally conductively connected to one first battery cell 10.

[0251] Optionally, the heat exchange plate 100 is thermally connected to at least two first battery cells 10 to enhance the heat transfer between the heat exchange plate 100 and the first battery cells 10, dissipate the heat of the first battery cells 10, and further inhibit heat diffusion.

[0252] As can be understood, if the temperature of the first battery cell 10 is too high, the heat exchange plate 100 can be used to cool the first battery cell 10 to lower its temperature; if the temperature of the first battery cell 10 is too low, the heat exchange plate 100 can heat the first battery cell 10 to raise its temperature. The heat exchange medium can be liquid and / or gas. The heat exchange plate 100 is used to adjust the temperature of at least two first battery cells 10. When the heat exchange plate 100 is used to lower the temperature of the first battery cells 10, the heat exchange passages 100a can accommodate a cooling medium to adjust the temperature of the plurality of first battery cells 10. In this case, the heat exchange medium can be referred to as a cooling medium or cooling fluid, or more specifically, as a coolant or cooling gas. Alternatively, the heat exchange medium can be water, a mixture of water and ethylene glycol, a heat-conducting oil, a refrigerant, air, or the like.

[0253] Optionally, the heat exchange passage 100a may have an inlet and an outlet, thereby realizing the flow of the heat exchange medium and improving the heat exchange efficiency.

[0254] Optionally, the battery 200 may include multiple rows of battery units 10A arranged in sequence along the first direction, each battery unit 10A including multiple first battery cells 10, and in the third direction Z, the heat exchange plate 100 may be located on one side of all the first battery cells 10, at this time, the heat exchange plate 100 may be used to realize thermal management of all the first battery cells 10, and further optionally, the heat exchange passage 100a may be configured to include multiple sub-flow paths spaced apart along the first direction, each sub-flow path may extend along the second direction, and each sub-flow path may correspond to one row of battery units 10A.

[0255] Referring to FIG. 22 , in some embodiments of the present application, the first sidewall 111 of at least one first battery cell 10 is thermally conductively connected to the insert member 110 .

[0256] In the above technical solution, the insert member 110 is installed so as to be thermally connected to the first side wall 111 of at least one first battery cell 10, thereby increasing the heat exchange area between the insert member 110 and the corresponding first battery cell 10, thereby improving the heat transfer efficiency between the insert member 110 and the first battery cell 10 and improving the temperature control effect of the battery 200. Furthermore, the insert member 110 can provide a certain reinforcement effect to the first side wall 111 of the corresponding first battery cell 10, thereby increasing the deformation resistance ability of the first side wall 111 corresponding to the first battery cell 10, and thereby reducing the probability of the first battery cell 10 being subjected to uneven forces, which is prone to problems such as local lithium deposition and thermal runaway.

[0257] For example, the battery 200 may include multiple rows of battery units 10A arranged in sequence along the first direction X, each battery unit 10A including multiple first battery cells 10, with an insert member 110 provided between two adjacent rows of battery units 10A and / or between the battery units 10A and the inner wall of the housing 30. For each insert member 110, the insert member 110 may be thermally conductively connected to at least one first side wall 111 of at least one row of battery units 10A, and in this case, the insert member 110 may be thermally conductively connected to the first side wall 111 of at least one first battery cell 10 of the corresponding battery unit 10A. Furthermore, each battery unit 10A may include multiple first battery cells 10 arranged in sequence along the second direction Y, with the insert member 110 thermally conductively connected to the first side wall 111 of each first battery cell 10 in the corresponding battery unit 10A.

[0258] Alternatively, the insert member 110 may have a plate-like structure, and the "large surface" of the insert member 110 may be thermally connected to the "large surface" of the first battery cell 10. In the third direction, the height of the insert member 110 may match the shoulder height of the first battery cell 10. The thickness of the insert member 110 may be set according to actual needs, for example, the thickness of the insert member 110 may be 2 mm. The insert member 110 may have a solid plate-like structure, or a cavity may be defined within the insert member 110, thereby forming the insert member 110 into a hollow plate-like structure.

[0259] Optionally, the insert 110 is adhesively secured to the first sidewall 111 .

[0260] Referring to FIG. 22, in some embodiments of the present application, the insert member 110 and the heat exchange plate 100 are a unitary structural member.

[0261] In the above technical solution, the insert member 110 and the heat exchange plate 100 are installed as an integral structural member, which makes it easier to improve the strength of the insert member 110 and the heat exchange plate 100, saves the connection process between the insert member 110 and the heat exchange plate 100, improves the assembly efficiency of the battery 200, and at the same time, is advantageous in improving the heat transfer efficiency between the insert member 110 and the heat exchange plate 100 to a certain extent.

[0262] Alternatively, the insert member 110 may be fixed to the heat exchange plate 100 by welding, but the connection between the insert member 110 and the heat exchange plate 100 is not limited thereto.

[0263] Of course, in other embodiments, the insert 110 and the heat exchange plate 100 may be separate structural members.

[0264] 24-27, in some embodiments of the present application, the battery 200 further includes a fixing bracket 120 that limits the displacement of each first battery cell 10.

[0265] In the above technical solution, a fixing bracket 120 is installed to limit the displacement of each first battery cell 10, thereby imposing a certain restriction on each first battery cell 10, thereby increasing the structural strength between the multiple first battery cells 10, making it easier to form the multiple first battery cells 10 into a single stable whole, and improving the reliability of the battery 200.

[0266] Optionally, the fixing bracket 120 may be configured to limit displacement of each first battery cell 10 in a first direction X, a second direction Y, and a third direction Z, where the third direction Z is perpendicular to the first direction X and the second direction Y, but is not limited thereto. For example, the fixing bracket 120 may be configured to limit displacement of each first battery cell 10 in the first direction X and the second direction Y.

[0267] 24-27 , in some embodiments of the present application, a battery 200 includes multiple rows of battery units 10A, each row of battery units 10A including multiple first battery cells 10, the multiple rows of battery units 10A being arranged in sequence in a first direction X, each row of battery units 10A being installed corresponding to a fixing bracket 120, and the multiple first battery cells 10 of each row of battery units 10A being attached to the fixing bracket 120.

[0268] In the above technical solution, by installing a fixing bracket 120 corresponding to each row of battery units 10A and installing the multiple first battery cells 10 of each row of battery units 10A so that they are attached to the fixing bracket 120, the arrangement of the fixing bracket 120 is consistent with the arrangement of the battery units 10A, so that the fixing bracket 120 can provide a certain positional restriction for each first battery cell 10 of each row of battery units 10A, improving the reliability of the entire battery 200, and at the same time, the arrangement of the fixing bracket 120 does not affect the relative arrangement between the first battery cells 10 of two adjacent rows of battery units 10A.

[0269] As can be understood, each row of battery units 10A may correspond to one fixing bracket 120, and the battery 200 may include multiple fixing brackets 120, which may be arranged in sequence along the first direction X, and each row of battery units 10A may form a pair with a corresponding single fixing bracket 120. In this case, if the battery units 10A in adjacent rows are installed with their positions staggered, the installation of the fixing brackets 120 does not affect the staggered installation of the battery units 10A in the adjacent rows.

[0270] For example, the multiple first battery cells 10 of each row of battery units 10A may be arranged in sequence along the second direction Y, and the fixing bracket 120 may be arranged along the second direction Y, making it easier to assemble the fixing bracket 120 and each first battery cell 10 of the battery unit 10A.

[0271] Optionally, each first battery cell 10 and the fixing bracket 120 are fixed with a structural adhesive, which is advantageous for further improving the reliability of the battery 200.

[0272] 24-27, in some embodiments of the present application, each fixing bracket 120 includes a connection bracket 121 and a plurality of extension brackets 122, the connection bracket 121 is provided with a plurality of escape holes 121a for escaping the poles 12 of the first battery cell 10, the plurality of extension brackets 122 are installed on the connection bracket 121 at intervals, each extension bracket 122 is provided with a retaining plate 123, the first battery cell 10 is provided between adjacent extension brackets 122, and the retaining plate 123 abuts against the first side wall 111.

[0273] In the above technical solution, the connecting bracket 121 is configured to have an escape hole 121a for the pole 12 to escape, so that the pole 12 can be fitted into the escape hole 121a and the pole 12 can be installed at a distance from the peripheral wall of the escape hole 121a, so that the connecting bracket 121 does not interfere with the pole 12, and at the same time, there is a certain distance between the pole 12 and the connecting bracket 121, which is advantageous to improving the insulation performance between the connecting bracket 121 and the pole 12, and the first battery cell 1 By providing the extension brackets 122 with the retaining plate 123 between the adjacent extension brackets 122, the two adjacent extension brackets 122 can easily restrict the displacement of the corresponding first battery cell 10 in the second direction Y, and the extension brackets 122 can easily not restrict the expansion and deformation of the first battery cell 10 in the first direction, so as to realize normal expansion of the first battery cell 10. The retaining plate 123 abuts against the first side wall 111, and the retaining plate 123 can easily be used to restrict the displacement of the corresponding first battery cell 10 in the first direction X.

[0274] Alternatively, a first battery cell 10 may be provided on each side of each extension bracket 122 in the second direction Y, and in this case, the outermost first battery cell 10 in the second direction Y of the battery unit 10A may be provided between one of the extension brackets 122 and the inner wall of the housing 30.

[0275] Optionally, the relief hole 121 a may also be used to relieve the pressure relief structure 13 of the first battery cell 10 .

[0276] Optionally, a retaining plate 123 may be provided on each side of each extension bracket 122 in the first direction X, and at least one first battery cell 10 may be provided between the two retaining plates 123 corresponding to the extension bracket 122, thereby improving the restraining ability for the first battery cell 10.

[0277] Alternatively, the stop plates 123 may abut against the first side walls 111 of one or two first battery cells 10 corresponding to the extension bracket 122, respectively, thereby realizing the restriction of multiple first battery cells 10 with a relatively small number of stop plates 123. For example, a first battery cell 10 may be provided on each side of each extension bracket 122 in the second direction Y, and each stop plate 123 may abut against both first side walls 111 of two adjacent first battery cells 10 corresponding to the extension bracket 122, thereby allowing each stop plate to be used to restrict the displacement of the two adjacent first battery cells 10, which is advantageous in appropriately reducing the number of stop plates 123. Of course, a stop plate 123 may be provided on one side in the first direction X of any two adjacent first battery cells 10 of the battery unit 10A.

[0278] 26 and 27 , the connection bracket 121 includes a reinforcing plate 1211, and the reinforcing plate 1211 is provided with a plurality of escape holes 121a, each of which penetrates the reinforcing plate 1211 in a third direction Z, where the third direction Z is perpendicular to the first direction X and the second direction Y, respectively. The reinforcing plate 1211 abuts against one side wall 11 of the first battery cell 10 in the third direction Z, so that the reinforcing plate 1211 can be used to limit displacement of the first battery cell 10 in the third direction Z. Furthermore, the connection bracket 121 further includes a shroud 1212, which extends annularly around the outer peripheral edge of the reinforcing plate 1211 and extends from the outer peripheral edge of the reinforcing plate 1211 toward the side where the first battery cell 10 is located. The shroud 1212 can abut against both side walls 11 in the first direction X of at least each first battery cell 10 of the battery unit 10A, respectively, so that the shroud 1212 can be used to limit displacement of the first battery cell 10 in the first direction X. Furthermore, the shroud 1212 can also abut against corresponding side walls 11 in the second direction Y of the two outermost first battery cells 10 of the battery unit 10A in the second direction Y, so that the shroud 1212 can also be used to limit displacement of the entire battery unit 10A in the second direction Y.

[0279] According to a second aspect, an embodiment of the present application provides a power consuming device 1000, which includes the above-mentioned battery 200, and the battery 200 is used to provide electrical energy.

[0280] In the above technical solution, the power consuming device 1000 employs the above battery 200, and the heat dissipation of the battery 200 is easily controlled, which is advantageous to improving the reliability of the power consuming device 1000 in use.

[0281] Referring again to Figures 3-7, 12-14, and 18-21, a battery 200 of an exemplary embodiment of the present application will now be described.

[0282] In the embodiment of the present application, the battery 200 includes a housing 30 and multiple rows of battery units 10A arranged in sequence along a first direction, all of the battery units 10A are arranged within the housing 30, and each row of the battery units 10A includes a plurality of first battery cells 10 arranged in sequence along a second direction, and each first battery cell 10 includes two first side walls 111 facing each other along the first direction and two second side walls 112 facing each other along the second direction, and the first side walls 111 that are arranged opposite each other in any two adjacent rows of the battery units 10A are arranged in a staggered position, and each first battery cell 10 in any two adjacent rows of the battery units 10A is arranged in a staggered position with respect to the first battery cell 10 corresponding to the other row, and the two staggered first side walls 111 are thermally conductively connected, and the second side walls 112 of any two adjacent first battery cells 10 in each row of the battery units 10A are thermally conductively connected. The first direction is parallel to the width direction of the housing 30 , and the second direction is parallel to the length direction of the housing 30 .

[0283] A plurality of partition plates 40 are provided in the housing 30 at intervals along a first direction to define a plurality of storage chambers 30a, and a plurality of rows of battery units 10A are provided in each storage chamber 30a and are installed in staggered positions, and the partition plates 40 are thermally conductively connected to adjacent battery units 10A, and the partition plates 40 are thermally conductively connected to the housing 30.

[0284] The first battery cells 10 in adjacent rows, which are staggered, are electrically connected via a bus bar 50. The bus bar 50 includes a transition portion 51 and two electrical connection portions 52. The extension direction of the transition portion 51 forms an angle with the first direction X and the second direction Y. A tensile buffer portion 53 is connected between each electrical connection portion 52 and the transition portion 51. The buffer portion 53 includes at least a bending portion 531 having an opening 530, whereby the bending portion 531 is formed into a protrusion having the opening 530.

[0285] A staggered space 30b is provided between the staggered battery units 10A of an adjacent row and the inner wall of the housing 30, and a filler 60 is provided in the staggered space 30b, the filler 60 including a second battery cell 61, the second battery cell 61 electrically connected to the first battery cell 10 at least in a series connection manner, the second battery cell 61 and the first battery cell 10 having different chemical systems and a volume of the second battery cell 61 smaller than the volume of the first battery cell 10, and the side wall 11 of the second battery cell 61 is installed flush with the end face of the battery unit 10A of the adjacent row in the second direction Y.

[0286] The battery 200 further includes a heat-conducting reinforcing member 70 that is sandwiched between two adjacent rows of battery units 10A and thermally conductively connected to the first side walls 111 of the battery units 10A, and that is also thermally conductively connected to the housing 30. A cavity 70a for buffering stress is provided within the heat-conducting reinforcing member 70, and a support structure 80 and a heat-absorbing material member 90 are provided within the cavity 70a.

[0287] The above technical solution can reduce the heat transferred to other single first battery cells 10 when the first battery cell 10 experiences thermal runaway, thereby suppressing heat diffusion and simultaneously realizing thermal management of the first battery cell 10 during the use of the battery 200.

[0288] According to some embodiments of the present application, the present application further provides a power consuming device 1000, which includes the battery 200 of the above embodiment, and the battery 200 is used to provide electrical energy to the power consuming device 1000.

[0289] In the above technical solution, the battery 200 is installed in the power consuming device 1000, and the heat dissipation of the battery 200 is easily controlled, which is advantageous to improving the reliability of the power consuming device 1000 in use.

[0290] It should be noted that, unless there is a conflict, the embodiments and features in the embodiments in the present application can be combined with each other.

[0291] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. [Explanation of symbols]

[0292] 1000: power consumption device, 200: battery, 300: controller, 400: motor, X: first direction, Y: second direction, Z: third direction, 10: first battery cell, 10A: battery unit, 11: side wall, 111: first side wall, 112: second side wall, 12: pole, 13: pressure relief structure, 30: Housing, 30a: Receiving chamber, 30b: Displaced space, 301: First housing, 302: Second housing, 40: Partition board, 50: bus bar, 51: transition portion, 52: electrical connection portion, 53: buffer portion, 530: opening, 531: folding portion, 5311: first segment, 5312: second segment, 54: reinforcing member, 60: filler, 61: second battery cell, 62: monitor, 621: air pressure sensor, 622: lithium deposition monitor, 63: filled thermal conductive member, 70: heat conduction reinforcing member, 70a: cavity, 71: heat conduction side wall, 80: Support structure, 90: Heat absorbing material member, 100: Heat exchange plate, 100a: Heat exchange passage, 110: Insert member, 120: fixing bracket, 121: connecting bracket, 121a: escape hole, 1211: reinforcing plate, 1212: shroud, 122: extension bracket, 123: retaining plate, 130: second bus bar.

Claims

1. A battery, A battery including at least two first battery cells, each of the first battery cells having a plurality of side walls, the plurality of side walls including a first side wall, the first side wall being the side wall of the first battery cell having the largest area, the first side walls of the at least two first battery cells being arranged opposite each other in a first direction and offset from each other in a second direction, the first direction and the second direction being perpendicular to each other, and the first direction being perpendicular to the first side wall.

2. 10. The battery of claim 1, wherein at least two of the first side walls that are offset are thermally conductively connected.

3. 3. The battery of claim 2, wherein a thermally conductive adhesive layer is provided between at least two of the first side walls that are offset from one another.

4. 4. The battery according to claim 1, wherein an overlapping area of ​​an overlapping portion between two of the first battery cells that are staggered in position in the second direction is L1, an area of ​​the first side wall is L2, and a value range of the ratio of L1 to L2 is 2 / 9 to 7 / 9.

5. 5. The battery of claim 4, wherein the ratio of L1 to L2 is in the range of 5 / 13 to 8 / 13.

6. 6. The battery according to claim 1, wherein the battery includes a plurality of rows of battery units, each row of the battery units including a plurality of the first battery cells, the rows of the battery units being arranged in order in the first direction, and the first side walls of the battery units in at least two adjacent rows that are installed opposite each other in the first direction are installed in staggered positions.

7. 7. The battery of claim 6, wherein each of the first battery cells includes a second side wall connected to the first side wall, and each of the first battery cells is thermally conductively connected to an adjacent first battery cell via at least one of the first side wall and at least one of the second side wall.

8. 8. The battery according to claim 6 or 7, further comprising a housing, wherein the plurality of rows of battery units are provided in the housing, the plurality of first battery cells of the battery units in each row are arranged in order along the second direction, and the second direction is parallel to a longitudinal direction of the housing.

9. The battery according to claim 8 , wherein a partition plate is provided in the housing to define a plurality of storage chambers, and the battery units are provided in each of the storage chambers in at least two rows, with positions of the battery units being staggered.

10. The battery according to claim 9 , wherein the partition plate is thermally conductively connected to the adjacent battery unit, and the partition plate is thermally conductively connected to the housing.

11. The battery according to claim 6 , wherein the first side walls of the battery units in any two adjacent rows that are disposed opposite each other are staggered.

12. The battery according to claim 6 , wherein the first battery cells in adjacent rows that are staggered are electrically connected via a bus bar.

13. 13. The battery of claim 12, wherein the bus bar includes a transition portion and two electrical connection portions, both ends of the transition portion are respectively connected to the two electrical connection portions, an extension direction of the transition portion and the first and second directions form an angle, and the two electrical connection portions are respectively electrically connected to the two first battery cells.

14. The battery of claim 13 , wherein the transition portion is provided with a tension-deformable buffer portion.

15. 15. The battery of claim 13 or 14, wherein a tension-deformable buffer portion is connected between each of the electrical connections and the transition portion.

16. The battery according to claim 14 or 15, wherein the buffer portion includes at least a folded portion having an opening.

17. 17. The battery of claim 13, wherein the transition portion is provided with a reinforcing member, the reinforcing member being made of a conductive material.

18. The battery of claim 17 , wherein the reinforcing member and the transition portion are disposed in a stacked arrangement.

19. 19. The battery according to claim 6, further comprising a housing, wherein a plurality of rows of the battery units are provided in the housing, and staggered spaces are provided between the battery units of adjacent rows that are staggered and an inner wall of the housing, and a filler is provided in the staggered spaces.

20. 20. The battery of claim 19, wherein the fill includes a second battery cell, the second battery cell disposed in the offset space, and the second battery cell electrically connected to the first battery cell.

21. 21. The battery of claim 20, wherein the volume of the second battery cell is smaller than the volume of the first battery cell.

22. 22. The battery according to claim 20 or 21, wherein in the second direction, a side wall of the second battery cell is placed flush with an end face of the battery unit in an adjacent row.

23. 23. The battery of claim 20, wherein the first battery cell and the second battery cell are electrically connected in at least a series connection manner, and the second battery cell and the first battery cell have different chemical systems.

24. 24. The battery of claim 19, wherein the filling includes a monitor for detecting an operating state of each of the first battery cells.

25. 25. The battery of claim 19, wherein the filler includes a filled thermally conductive member that is thermally connected to the housing, and the filled thermally conductive member is used to conduct heat from the corresponding first battery cell to the housing.

26. 26. The battery of claim 1, further comprising a thermally conductive reinforcing member and a housing, wherein the at least two first battery cells are disposed in the housing, at least one of the first battery cells is thermally conductively connected to the thermally conductive reinforcing member, and the thermally conductive reinforcing member is thermally conductively connected to the housing.

27. 27. The battery of claim 26, wherein the thermally conductive reinforcing member is sandwiched between the first battery cells that are arranged opposite each other in the first direction, and the thermally conductive reinforcing member is thermally connected to the first side wall of the corresponding first battery cell.

28. 28. The battery of claim 27, wherein a cavity for buffering stress is provided within the thermally conductive reinforcing member.

29. 29. The battery of claim 28, wherein the thermally conductive reinforcing member includes two thermally conductive side walls disposed opposite each other, the thermally conductive side walls being thermally connected to the opposing first side wall, and a support structure is provided in the cavity and connected to each of the two thermally conductive side walls.

30. 30. The battery of claim 29, wherein the support structure is formed into a network structure, and the network structure is filled with a heat-absorbing material member.

31. The battery further includes a heat exchange plate and a thermally conductive insert member, wherein the heat exchange plate is located on one side of at least two of the first battery cells in a third direction, and the third direction is perpendicular to the first direction and the second direction, respectively; 31. The battery of claim 1, wherein a heat exchange passage for disposing a heat exchange medium is provided within the heat exchange plate, and the insert member is provided on a surface of the heat exchange plate adjacent to the first battery cell and is thermally conductively connected to the first battery cell.

32. 32. The battery of claim 31, wherein the first sidewall of at least one of the first battery cells is thermally connected to the insert member.

33. 33. The battery of claim 31 or 32, wherein the insert member and the heat exchange plate are a unitary member.

34. 34. The battery of claim 1, further comprising a fixing bracket that limits displacement of each of the first battery cells.

35. 35. The battery of claim 34, wherein the battery includes a plurality of rows of battery units, each row of the battery units including a plurality of the first battery cells, the plurality of rows of the battery units being arranged in order in the first direction, each row of the battery units being installed corresponding to the fixing bracket, and the plurality of first battery cells of the battery units in each row being attached to the fixing bracket.

36. Each of the fixing brackets is a connection bracket provided with a plurality of escape openings for the poles of the first battery cell; 36. The battery of claim 35, further comprising: a plurality of extension brackets mounted on the connection bracket at intervals, each extension bracket having a retaining plate, the first battery cell being disposed between adjacent extension brackets, and the retaining plate abutting the first side wall.

37. 37. An electrical power consuming device, comprising a battery for supplying electrical energy according to any one of claims 1 to 36.

Images