Battery and electric device

Abstract

The present application is applicable in the technical field of batteries (100). Provided are a battery (100) and an electric device. The battery (100) comprises battery cells (10), a case (20), and a thermal management assembly (30). The case (20) is provided with a first wall (211), and the first wall (211) comprises a first sub-wall (2111) and a second sub-wall (2112). The thermal management assembly (30) comprises a first part (30a) and a second part (30b), wherein the first part (30a) is provided with a first flow channel (301a); the second part (30b) is provided with a second flow channel (301b); and the distance between the battery cells (10) and the side of the first flow channel (301a) close to the battery cells (10) is less than the distance between the battery cells (10) and the side of the second flow channel (301b) close to the battery cells (10), and / or the cross-sectional area of the first flow channel (301a) is greater than the cross-sectional area of the second flow channel (301b). In this way, the battery cells (10) at different positions can be subjected to partitioned thermal management, such that the battery (100) has a balanced temperature.

Description

Batteries and electrical devices

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application with application number 202420239482.5 and application name “Battery and Electrical Device” filed with the State Intellectual Property Office of the People’s Republic of China on January 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of battery technology, and more specifically, relates to a battery and an electrical device. Background Art

[0004] In related technologies, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, they are connected in series, parallel, or in a hybrid configuration using a busbar. A hybrid configuration involves connecting multiple battery cells in both series and parallel configurations.

[0005] The battery may include a box body, wherein a battery compartment is provided inside the box body, and the battery cells are accommodated in the battery compartment.

[0006] In some cases, the temperatures of battery cells at different locations in the battery are different, which results in low temperature consistency of the battery, affecting the reliability and service life of the battery.

[0007] Summary of the Invention

[0008] In view of the above problems, embodiments of the present application provide a battery and an electrical device that can improve the technical problem of poor temperature consistency of the battery.

[0009] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0010] Battery cells;

[0011] A box body, in which the battery cells are accommodated; a first wall is provided on an end side of the box body along a first direction, the first wall including a first partition wall and a second partition wall;

[0012] The thermal management component includes a first part and a second part; the first part is arranged on the first partition wall and is provided with a first flow channel; the second part is arranged on the second partition wall and is provided with a second flow channel;

[0013] In the first direction, the distance between the side of the first flow channel close to the battery cell and the battery cell is smaller than the distance between the side of the second flow channel close to the battery cell and the battery cell; and / or the cross-sectional area of ​​the first flow channel is larger than the cross-sectional area of ​​the second flow channel.

[0014] In an embodiment of the present application, a battery is provided in which a first wall of a housing along a first direction is divided into a first partition wall and a second partition wall, and a thermal management component is divided into a first portion disposed on the first partition wall and a second portion disposed on the second partition wall. Furthermore, in the first direction, the distance between the first flow channel of the first portion, which is closer to the battery cell, and the battery cell is smaller than the distance between the second flow channel of the second portion, which is closer to the battery cell. This reduces the heat conduction distance between the first flow channel and the battery cell, thereby improving the thermal management effect of the first portion on the battery cell. Furthermore, the cross-sectional area of ​​the first flow channel is larger than the cross-sectional area of ​​the second flow channel. This increases the flow rate of the thermal management medium in the first flow channel and improves the heat exchange efficiency, thereby improving the thermal management effect of the first portion on the battery cell. Based on this, the thermal management effect of the first portion on the battery cell is superior to that of the second portion. Thus, if the temperatures of battery cells at different locations are different, the battery cells with higher temperatures can be arranged opposite the first partition wall to achieve thermal management through the first portion, while the battery cells with lower temperatures can be arranged opposite the second partition wall to achieve thermal management through the second portion. With this arrangement, battery cells at different positions can be thermally managed through different parts of the thermal management component, so that thermal management with different effects can be performed in different areas. This can improve the temperature consistency of battery cells at different positions within the battery, that is, make the battery as a whole have a more balanced temperature, thereby improving the battery's service life and reliability.

[0015] In some embodiments, in the first direction, the wall thickness of the first partition wall is smaller than the wall thickness of the second partition wall.

[0016] Such a setting makes it easier for the first part to have better thermal management effect on the first battery cell than the second part to have thermal management effect on the second battery cell, so that the first battery cell and the second battery cell can be thermally managed with different effects through the first part and the second part respectively, thereby facilitating the improvement of the temperature consistency of the battery cells at different positions in the battery, that is, the battery as a whole has a more balanced temperature, so as to improve the service life and reliability of the battery.

[0017] In some embodiments, the difference between the wall thickness of the second partition wall and the wall thickness of the first partition wall is within 0.5 mm.

[0018] This configuration ensures that the battery as a whole has a more balanced temperature, thereby increasing the battery's service life and reliability.

[0019] In some embodiments, in the first direction, a side of the second partition wall away from the battery cell exceeds the first partition wall, the first portion is disposed on the side of the first partition wall away from the battery cell, and the second portion is disposed on the side of the second partition wall away from the battery cell;

[0020] And / or, in the first direction, the side of the second partition wall close to the battery cell exceeds the first partition wall, the first portion is arranged on the side of the first partition wall close to the battery cell, and the second portion is arranged on the side of the second partition wall close to the battery cell.

[0021] Such an arrangement facilitates improving the temperature consistency of battery cells at different positions within the battery, that is, making the battery as a whole have a more balanced temperature, thereby improving the service life and reliability of the battery.

[0022] In some embodiments, in the first direction, a side of the first portion away from the first partition wall is flush with a side of the second portion away from the second partition wall.

[0023] Such an arrangement makes it easier for the size of the first flow channel in the first direction to be larger than the size of the second flow channel in the first direction Z, so that the cross-sectional area of ​​the first flow channel is larger than the cross-sectional area of ​​the second flow channel, thereby making the thermal management effect of the first part on the first battery cell better than the thermal management effect of the second part on the second battery cell.

[0024] In some embodiments, in the first direction, a wall thickness of the first portion in the first flow channel close to the battery cell is smaller than a wall thickness of the second portion in the second flow channel close to the battery cell.

[0025] Such an arrangement makes it easy to achieve a first distance between the side of the first flow channel close to the battery cell and the battery cell in the first direction, and a second distance between the side of the second flow channel close to the battery cell and the battery cell in the first direction, thereby making it easy to achieve that the thermal management effect of the first part on the first battery cell is better than the thermal management effect of the second part on the second battery cell.

[0026] In some embodiments, the size of the first channel in the first direction is larger than the size of the second channel in the first direction; and / or, the size of the first channel in the width direction of the first portion is larger than the size of the second channel in the width direction of the second portion.

[0027] With such an arrangement, the cross-sectional area of ​​the first flow channel can be larger than the cross-sectional area of ​​the second flow channel.

[0028] In some embodiments, the first flow channel is connected to at least a portion of the second flow channel; or, the first flow channel and the second flow channel are independent of each other.

[0029] By adopting the above technical solution, the arrangement of the first flow channel and the second flow channel is very flexible.

[0030] In some embodiments, the thermal management assembly includes a first thermal management component, the first thermal management component is provided with a first portion and a second portion, and the first flow channel is in communication with the second flow channel.

[0031] With such an arrangement, the heat management medium can sequentially pass through the first flow channel and the second flow channel and realize a circulating flow, thereby realizing heat management of the first battery cell and the second battery cell in sequence.

[0032] In some embodiments, the thermal management assembly includes a second thermal management component and a third thermal management component, the second thermal management component has a first part, the third thermal management component has a second part, and the first flow channel of the first part of the second thermal management component and the second flow channel of the second part of the third thermal management component are arranged independently of each other.

[0033] With this arrangement, at least part of the first battery cells and at least part of the second battery cells can achieve thermal management through different circulation loops, thereby facilitating partitioned thermal management of the first battery cells and the second battery cells, and improving the temperature consistency of the battery.

[0034] In some embodiments, the second thermal management component further includes a second portion, and the first flow channel of the first portion of the second thermal management component is in communication with the second flow channel of the second portion of the second thermal management component.

[0035] In this way, the distribution of the first flow channel and the second flow channel is very flexible.

[0036] In some embodiments, the second partition wall is disposed around the outer periphery of the first partition wall;

[0037] Alternatively, the first partition walls and the second partition walls are distributed sequentially along a second direction, and the second direction intersects the first direction.

[0038] By adopting the above technical solution, the first partition wall and the second partition wall can be arranged according to the temperature difference of battery cells at different positions, which is very flexible.

[0039] In some embodiments, the first portion is welded or bonded or integrally connected to the first partition wall; and / or the second portion is welded or bonded or integrally connected to the second partition wall.

[0040] By adopting the above technical solution, the fixing operations of the first part on the first partition wall and the fixing operations of the second part on the second partition wall are both very flexible.

[0041] In a second aspect, an embodiment of the present application provides an electrical device including a battery.

[0042] The electrical device provided in the embodiment of the present application adopts the above-mentioned battery so that the battery cells in different positions can be partitioned and thermally managed with different effects, so that the battery as a whole has a more balanced temperature, which can improve the service life and reliability of the battery, and thus improve the service life and reliability of the electrical device.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0045] FIG1 is a schematic diagram of a vehicle provided in some embodiments of the present application;

[0046] FIG2 is an exploded schematic diagram of a battery provided in some embodiments of the present application;

[0047] FIG3 is a partial three-dimensional structural diagram of a battery provided in some embodiments of the present application;

[0048] FIG4 is a cross-sectional view taken along line AA in FIG3 ;

[0049] Figure 5 is an enlarged view of point B in Figure 4;

[0050] FIG6 is a cross-sectional view of batteries provided in some other embodiments of the present application;

[0051] FIG7 is an enlarged view of point C in FIG6 .

[0052] Among them, the figure marks in the figure are: 1000-vehicle; 100-battery; 200-controller; 300-motor; 10-battery cell; 10a-first battery cell; 10b-second battery cell; 20-box; 201-battery compartment; 21-box body; 211-first wall; 2111-first partition wall; 2112-second partition wall; 22-cover; 30-thermal management component; 30a-first part; 301a-first flow channel; 30b-second part; 301b-second flow channel; 31-first thermal management component; 32-second thermal management component; 33-third thermal management component; H1-first distance; H2-second distance; H3-first size; H4-second size; H5-third size; H6-fourth size; H7-fifth size; H8-sixth size; S1-cross section of the first flow channel; S2-cross section of the second flow channel; Z-first direction. DETAILED DESCRIPTION

[0053] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0054] Unless otherwise specified, all implementations and optional implementations of the embodiments of the present application can be combined with each other to form a new technical solution.

[0055] Unless otherwise specified, all technical features and optional technical features of the embodiments of the present application can be combined with each other to form a new technical solution.

[0056] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0058] In the description of the embodiments of the present application, "a plurality of" means more than two, and unless otherwise specifically defined, "more than two" includes two. Accordingly, "a plurality of groups" means more than two groups, including two groups.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0060] In the description of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the related objects are in an "or" relationship.

[0061] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0062] In related technologies, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, they are connected in series, parallel, or in a hybrid configuration using a busbar. A hybrid configuration involves connecting multiple battery cells in both series and parallel configurations.

[0063] The battery may include a box body, wherein a battery compartment is provided inside the box body, and the battery cells are accommodated in the battery compartment.

[0064] In some cases, due to the influence of thermal management systems, metal structural parts, etc., the temperatures of battery cells at different positions in the battery are different, which makes the battery temperature consistency low, affecting the battery's reliability and service life.

[0065] For example, a battery includes cells located in the center and cells located on the periphery. Metal structural members are placed near the cells located on the periphery to allow heat transfer from the cells to the metal structural members, making it easier for the heat from the cells located on the periphery to be transferred to the outside world. However, the overall thermal management system maintains consistent thermal management, resulting in a lower temperature for the cells located on the periphery than for the cells located in the center, leading to poor temperature consistency in the battery.

[0066] Based on the above considerations, embodiments of the present application provide a battery and an electrical device, wherein a first wall of a housing along a first direction is divided into a first partition wall and a second partition wall, and a thermal management component is divided into a first portion disposed on the first partition wall and a second portion disposed on the second partition wall. Furthermore, in the first direction, the distance between the first flow channel of the first portion, which is closer to the battery cell, and the battery cell is smaller than the distance between the second flow channel of the second portion, which is closer to the battery cell, thereby reducing the heat conduction distance between the first flow channel and the battery cell, thereby improving the thermal management effect of the first portion on the battery cell. Furthermore, the cross-sectional area of ​​the first flow channel is larger than the cross-sectional area of ​​the second flow channel, thereby increasing the flow rate of the thermal management medium in the first flow channel and improving the heat exchange efficiency, thereby improving the thermal management effect of the first portion on the battery cell. Consequently, the thermal management effect of the first portion on the battery cell is superior to that of the second portion. Thus, if the temperatures of battery cells at different locations are different, the battery cells with higher temperatures can be arranged opposite the first partition wall to achieve thermal management through the first portion, while the battery cells with lower temperatures can be arranged opposite the second partition wall to achieve thermal management through the second portion. With this arrangement, battery cells at different positions can be thermally managed through different parts of the thermal management component, so that thermal management with different effects can be performed in different areas. This can improve the temperature consistency of battery cells at different positions within the battery, thereby making the battery as a whole have a more balanced temperature, thereby improving the battery's service life and reliability.

[0067] In some embodiments, the box structure and battery involved in the embodiments of the present application can be used in electrical devices that use batteries as power sources. The electrical devices involved in the embodiments of the present application may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, vehicles, ships, spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like. According to the power source, the vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like. According to the drive mode, the vehicle may be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle.

[0068] In other embodiments, the box structure and battery involved in the embodiments of the present application can also be used in energy storage devices, wherein the energy storage device can be an energy storage container, an energy storage cabinet, etc.

[0069] For ease of description, the embodiments of the present application are described using a vehicle as an example of an electrical device.

[0070] In some embodiments, please refer to FIG1 , which is a schematic diagram of a vehicle 1000 provided in some embodiments of the present application. The interior of the vehicle 1000 is provided with the above-mentioned battery 100, and the battery 100 can be provided at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating, and operating power requirements of the vehicle 1000 during driving.

[0071] In some embodiments, the battery 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0072] In some embodiments, please refer to FIG2 , which is an exploded schematic diagram of a battery 100 provided in some embodiments of the present application. The battery 100 may include a housing 20 and a plurality of battery cells 10 .

[0073] The box body 20 has a battery compartment 201 therein. The battery compartment 201 inside the box body 20 is used to accommodate the battery cells 10 .

[0074] The box body 20 can adopt a variety of structures. In some embodiments, the box body 20 can include a box body 21 and a cover body 22, and the box body 21 and the cover body 22 cover each other and jointly define the above-mentioned battery compartment 201. Among them, the box body 21 can be a hollow structure with an opening at one end, and the cover body 22 is a plate-like structure. The cover body 22 covers the open side of the box body 21, so that the box body 21 and the cover body 22 jointly define the above-mentioned battery compartment 201. Alternatively, please refer to Figure 2, the box body 21 and the cover body 22 can both be hollow structures with an opening at one end, and the open side of the box body 21 covers the open side of the cover body 22, so that the box body 21 and the cover body 22 jointly define the above-mentioned battery compartment 201. Among them, the box body 20 composed of the box body 21 and the cover body 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0075] In some embodiments, referring to FIG. 2 , multiple battery cells 10 may be connected in series, in parallel, or in a mixed connection to form a whole, and then the whole formed by the multiple battery cells 10 may be directly accommodated in the battery compartment 201 of the housing 20. In other embodiments, multiple battery cells 10 may also be connected in series, in parallel, or in a mixed connection first, and then arranged and fixed to form a battery module, and the battery module may be accommodated in the battery compartment 201 of the housing 20. In still other embodiments, multiple battery cells 10 may also be connected in series, in parallel, or in a mixed connection first, and then arranged and fixed to form multiple battery modules, and then the multiple battery modules may be connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in the battery compartment 201 of the housing 20.

[0076] As an example, a plurality of battery cells 10 may be fixed by cable ties to form a battery module. As another example, a plurality of battery cells 10 may be fixed by end plates, side plates, etc. to form a battery module.

[0077] In some embodiments, the housing 20 of the battery 100 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 may form at least a portion of the chassis of the vehicle 1000, or a portion of the housing 20 may form at least a portion of a cross member or a longitudinal member of the vehicle 1000.

[0078] The battery cell 10 referred to in the embodiments of this application refers to the smallest unit that stores and outputs electrical energy. The battery cell 10 can be a secondary battery or a primary battery. The battery cell 10 can be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 10 can be cylindrical, flat, rectangular, or other shapes.

[0079] Please refer to Figures 3 to 5 in conjunction with the other accompanying drawings. Figure 3 is a partial structural diagram of the battery 100 provided in some embodiments of the present application, Figure 4 is a cross-sectional view along AA of Figure 3, and Figure 4 shows a portion of the battery cell 10, and Figure 5 is an enlarged view of point B in Figure 4. The battery 100 provided in the embodiment of the present application includes a battery cell 10, a housing 20, and a thermal management component 30. The battery cell 10 is accommodated in the housing 20. The housing 20 is provided with a first wall 211 at the end side along the first direction Z, and the first wall 211 includes a first partition wall 2111 and a second partition wall 2112. The thermal management component 30 includes a first portion 30a and a second portion 30b. The first portion 30a is provided on the first partition wall 2111 and is provided with a first flow channel 301a. The second portion 30b is provided on the second partition wall 2112 and is provided with a second flow channel 301b. In some possible designs, in the first direction Z, the distance between the side of the first flow channel 301a close to the battery cell 10 and the battery cell 10 is smaller than the distance between the side of the second flow channel 301b close to the battery cell 10 and the battery cell 10, and the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b; or, in other possible designs, in the first direction Z, the distance between the side of the first flow channel 301a close to the battery cell 10 and the battery cell 10 is smaller than the distance between the side of the second flow channel 301b close to the battery cell 10 and the battery cell 10; or, in yet other possible designs, the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b.

[0080] The box body 20 refers to a structure having an inner cavity, and the inner cavity inside the box body 20 constitutes a battery compartment 201 .

[0081] The first wall 211 is a solid wall of the housing 20. The first wall 211 is provided at one end of the housing 20 along the first direction Z; alternatively, the first wall 211 is provided at both opposing ends of the housing 20 along the first direction Z. It is understood that the first wall 211 is provided at the end of the battery compartment 201 along the first direction Z. Specifically, the first wall 211 is provided at the end of the battery cell 10 along the first direction Z, so as to be opposite the battery cell 10 along the first direction Z. The first wall 211 can be provided on either the body 21 of the housing 20 or the cover 22 of the housing 20.

[0082] As shown in Figures 3 to 5 , the first direction Z is parallel to the Z axis. Figure 3 also shows the X axis and the Y axis. The X axis and the Y axis are perpendicular to each other, the X axis and the Z axis are perpendicular to each other, and the Y axis and the Z axis are perpendicular to each other. The X axis, the Y axis, and the Z axis constitute a spatial coordinate system.

[0083] The first wall 211 may include multiple partitions, wherein the two partitions are respectively a first partition 2111 and a second partition 2112. The first partition 2111 and the second partition 2112 are respectively two parts of the first wall 211. Accordingly, a plurality of battery cells 10 may be provided, and the plurality of battery cells 10 may be divided into at least two parts, wherein one of the two parts is a first battery cell 10a and the other is a second battery cell 10b. The first partition 2111 is disposed opposite the first battery cell 10a along the first direction Z, and the second partition 2112 is disposed opposite the second battery cell 10b along the first direction Z.

[0084] The thermal management assembly 30 is a component structure used for thermal management. It includes a flow channel, which serves as a passageway for the thermal management medium. Specifically, as the thermal management medium circulates within the flow channel, it exchanges heat with the battery cells 10, thereby achieving thermal management of the battery cells 10.

[0085] The thermal management component 30 performs thermal management on the battery cell 10, specifically by heating or cooling the battery cell 10. Specifically, the thermal management medium can be a medium with a higher temperature, which can increase the temperature of the battery cell 10 when the thermal management medium exchanges heat with the battery cell 10. The thermal management medium can also be a medium with a lower temperature, which can cool the battery cell 10 when the thermal management medium exchanges heat with the battery cell 10. The thermal management medium can be a medium in the form of a liquid, gas, or the like. As an example, the thermal management medium is a coolant.

[0086] The thermal management assembly 30 may include multiple parts, two of which are a first part 30a and a second part 30b. The flow channel within the first part 30a is the first flow channel 301a, and the flow channel within the second part 30b is the second flow channel 301b. It is understood that when the thermal management medium flows within the first flow channel 301a, it can exchange heat with the first battery cell 10a, thereby achieving thermal management of the first battery cell 10a. When the thermal management medium flows within the second flow channel 301b, it can exchange heat with the second battery cell 10b, thereby achieving thermal management of the second battery cell 10b.

[0087] It should be noted that the first flow channel 301a of the first portion 30a can form the same circulation loop with at least a portion of the second flow channel 301b of the second portion 30b, that is, the first flow channel 301a is connected to at least a portion of the second flow channel 301b. Specifically, the first flow channel 301a of the first portion 30a completely forms the same circulation loop with the second flow channel 301b of the second portion 30b, that is, the first flow channel 301a and the second flow channel 301b are connected; or, the second portion 30b has at least two independent second flow channels 301b, at least a portion of the second flow channel 301b of the second portion 30b is connected to the first flow channel 301a, and the remaining second flow channels 301b of the second portion 30b are independent of the first flow channel 301a. In other embodiments, the first flow channel 301a of the first portion 30a and the second flow channel 301b of the second portion 30b can be set independently of each other.

[0088] As shown in FIG5 , in the first direction Z, the distance between the side of the first flow channel 301a close to the battery cell 10 and the battery cell 10 is a first distance H1, specifically the distance between the side of the first flow channel 301a close to the first battery cell 10a along the first direction Z and the first battery cell 10a in the first direction Z. In the first direction Z, the distance between the side of the second flow channel 301b close to the battery cell 10 and the battery cell 10 is a second distance H2, specifically the distance between the side of the second flow channel 301b close to the second battery cell 10b along the first direction Z and the second battery cell 10b in the first direction Z.

[0089] As shown in Figures 4 and 5, Figures 4 and 5 show the cross-section S1 of the first flow channel 301a and the cross-section S2 of the second flow channel 301b. The cross-sectional area of ​​the first flow channel 301a refers to the area of ​​the cross-section S1 of the first flow channel 301a, and the cross-sectional area of ​​the second flow channel 301b refers to the area of ​​the cross-section S2 of the second flow channel 301b.

[0090] The cross-section S1 of the first flow channel 301a is parallel to the first direction Z and perpendicular to the extension direction of the first flow channel 301a. Specifically, the first flow channel 301a has a length, a width, and a thickness, and the length, width, and thickness of the first flow channel 301a are mutually perpendicular. The length direction of the first flow channel 301a is the extension direction of the first flow channel 301a, that is, the flow direction of the thermal management medium in the first flow channel 301a. The first direction Z is parallel to the thickness direction of the first flow channel 301a. The cross-section S1 of the first flow channel 301a is perpendicular to the length direction of the first flow channel 301a and parallel to the width and thickness directions of the first flow channel 301a.

[0091] Accordingly, the cross-section S2 of the second flow channel 301b is parallel to the first direction Z and perpendicular to the extension direction of the second flow channel 301b. Specifically, the second flow channel 301b has a length, a width, and a thickness, and the length, width, and thickness of the second flow channel 301b are perpendicular to each other. The length direction of the second flow channel 301b is the extension direction of the second flow channel 301b, that is, the flow direction of the thermal management medium in the second flow channel 301b. The first direction Z is parallel to the thickness direction of the second flow channel 301b. The cross-section S2 of the second flow channel 301b is perpendicular to the length direction of the second flow channel 301b and parallel to the width and thickness directions of the second flow channel 301b.

[0092] In some possible designs, the first distance H1 is smaller than the second distance H2, and the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b. Alternatively, in other possible designs, the first distance H1 is smaller than the second distance H2. Alternatively, in still other possible designs, the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b.

[0093] By making the first distance H1 smaller than the second distance H2, the thermal conduction distance between the first battery cell 10a and the thermal management medium in the first flow channel 301a is smaller than the thermal conduction distance between the second battery cell 10b and the thermal management medium in the second flow channel 301b. This allows for faster heat conduction and heat exchange between the first battery cell 10a and the thermal management medium in the first flow channel 301a than between the heat exchange medium in the second battery cell 10b and the second flow channel 301b. Consequently, the first portion 30a provides greater thermal management effectiveness and efficiency for the first battery cell 10a than the second portion 30b.

[0094] By making the cross-sectional area of ​​the first flow channel 301a larger than that of the second flow channel 301b, the flow rate of the thermal management medium in the first flow channel 301a can be greater than the flow rate of the thermal management medium in the second flow channel 301b. This allows for a higher heat exchange efficiency between the first battery cell 10a and the thermal management medium in the first flow channel 301a than between the heat exchange medium in the second battery cell 10b and the second flow channel 301b. Consequently, the first portion 30a can provide a higher thermal management effect and efficiency for the first battery cell 10a than the second portion 30b.

[0095] The battery 100 provided in the embodiment of the present application is divided into a first partition wall 2111 and a second partition wall 2112 by the first wall 211 of the box body 20 along the first direction Z, and the thermal management component 30 is divided into a first part 30a arranged on the first partition wall 2111 and a second part 30b arranged on the second partition wall 2112. Furthermore, in the first direction Z, the distance between the side of the first flow channel 301a of the first portion 30a proximate to the battery cell 10 and the battery cell 10 is smaller than the distance between the side of the second flow channel 301b of the second portion 30b proximate to the battery cell 10 and the battery cell 10, i.e., the first distance H1 is smaller than the second distance H2. This reduces the heat conduction distance between the first flow channel 301a and the battery cell 10, thereby improving the thermal management effect of the first portion 30a on the battery cell 10. Furthermore, the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b. This increases the flow rate of the thermal management medium in the first flow channel 301a and improves the heat exchange efficiency, thereby improving the thermal management effect of the first portion 30a on the battery cell 10. Therefore, the thermal management effect of the first portion 30a on the battery cell 10 is superior to that of the second portion 30b. In this way, when the temperatures of the battery cells 10 at different locations are different, the battery cell 10 with a higher temperature can be used as the first battery cell 10a and arranged to be opposite to the first partition wall 2111, so that thermal management can be achieved through the first portion 30a. The battery cell 10 with a lower temperature can be used as the second battery cell 10b and arranged to be opposite to the second partition wall 2112, so that thermal management can be achieved through the second portion 30b.

[0096] With this arrangement, battery cells 10 at different locations can be thermally managed separately by different portions of the thermal management assembly 30, achieving different thermal management effects in different zones. Specifically, the first battery cell 10a, which has a higher temperature, can be thermally managed by the first portion 30a, which has a better thermal management effect. This ensures that the first battery cell 10a and the second battery cell 10b have substantially the same temperature after thermal management. This improves the temperature consistency of battery cells 10 at different locations within the battery 100, ensuring a more uniform temperature across the entire battery 100, thereby increasing the battery's service life and reliability.

[0097] In some embodiments, please refer to FIG4 and FIG5 together with other drawings. In the first direction Z, the thickness of the first partition wall 2111 is smaller than the thickness of the second partition wall 2112 .

[0098] The wall thickness of the first partition wall 2111 along the first direction Z is a first dimension H3, and the wall thickness of the second partition wall 2112 along the first direction Z is a second dimension H4. The first dimension H3 is smaller than the second dimension H4.

[0099] By making the thickness of the first partition wall 2111 along the first direction Z smaller than the thickness of the second partition wall 2112 along the first direction Z, it is possible to design the size of the first portion 30a in the first direction Z to be larger than the size of the second portion 30b in the first direction Z. This, in turn, allows the size of the first flow channel 301a in the first direction Z to be larger than the size of the second flow channel 301b in the first direction Z. This allows the cross-sectional area of ​​the first flow channel 301a to be larger than the cross-sectional area of ​​the second flow channel 301b. In this way, the thermal management effect of the first portion 30a on the first battery cell 10a can be greater than the thermal management effect of the second portion 30b on the second battery cell 10b. On the other hand, when the first part 30a is arranged on the side of the first partition wall 2111 away from the first battery cell 10a along the first direction Z and the second part 30b is arranged on the side of the second partition wall 2112 away from the second battery cell 10b along the first direction Z, the first distance H1 between the side of the first flow channel 301a close to the first battery cell 10a and the first battery cell 10a is smaller than the second distance H2 between the side of the second flow channel 301b close to the second battery cell 10b and the second battery cell 10b, so that the heat conduction distance between the first flow channel 301a and the first battery cell 10a is smaller than the heat conduction distance between the second flow channel 301b and the second battery cell 10b, thereby making it easier for the first part 30a to have a better thermal management effect on the first battery cell 10a than the second part 30b to have a better thermal management effect on the second battery cell 10b.

[0100] Such a configuration makes it easier for the first part 30a to have a better thermal management effect on the first battery cell 10a than the second part 30b to have a thermal management effect on the second battery cell 10b, so that the first battery cell 10a and the second battery cell 10b can respectively perform thermal management with different effects through the first part 30a and the second part 30b, thereby facilitating the improvement of the temperature consistency of the battery cells 10 at different positions in the battery 100, that is, the battery 100 as a whole has a more balanced temperature, thereby improving the service life and reliability of the battery 100.

[0101] In some embodiments, please refer to FIG4 and FIG5 together with other drawings. The difference between the thickness of the second partition wall 2112 and the thickness of the first partition wall 2111 is within 0.5 mm.

[0102] It can be understood that 0<H4-H3≤0.5mm, wherein H4-H3 can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc.

[0103] Such a setting makes it possible to have a certain difference between the wall thickness of the second partition wall 2112 and the wall thickness of the first partition wall 2111, so that the thermal management effect of the first part 30a on the first battery cell 10a can be better than the thermal management effect of the second part 30b on the second battery cell 10b, so that the first battery cell 10a and the second battery cell 10b can respectively perform thermal management with different effects through the first part 30a and the second part 30b, thereby facilitating the improvement of the temperature consistency of the battery cells 10 at different positions in the battery 100, that is, the battery 100 as a whole has a more balanced temperature, so as to improve the service life and reliability of the battery 100.

[0104] In some embodiments, referring to Figures 4 and 5 in conjunction with other figures, in the first direction Z, the side of the second partition wall 2112 away from the battery cell 10 extends beyond the side of the first partition wall 2111 away from the battery cell 10, the first portion 30a is disposed on the side of the first partition wall 2111 away from the battery cell 10, and the second portion 30b is disposed on the side of the second partition wall 2112 away from the battery cell 10.

[0105] It can be understood that the side of the first partition wall 2111 away from the first battery cell 10a is recessed toward the first battery cell 10a, so that there is a height difference between the side of the first partition wall 2111 away from the first battery cell 10a along the first direction Z and the side of the second partition wall 2112 away from the second battery cell 10b along the first direction Z, thereby forming a stepped structure. In this way, the wall thickness of the first partition wall 2111 in the first direction Z (first dimension H3) is less than the wall thickness of the second partition wall 2112 in the first direction Z (second dimension H4).

[0106] This arrangement, on the one hand, facilitates designing the size of the first portion 30a in the first direction Z to be larger than the size of the second portion 30b in the first direction Z. This, in turn, facilitates the size of the first flow channel 301a in the first direction Z (fifth dimension H7 shown below) to be larger than the size of the second flow channel 301b in the first direction Z (sixth dimension H8 shown below). This allows the cross-sectional area of ​​the first flow channel 301a to be larger than the cross-sectional area of ​​the second flow channel 301b. In this way, the thermal management effect of the first portion 30a on the first battery cell 10a can be superior to the thermal management effect of the second portion 30b on the second battery cell 10b. On the other hand, the first distance H1 between the side of the first flow channel 301a closest to the first battery cell 10a and the first battery cell 10a is smaller than the second distance H2 between the side of the second flow channel 301b closest to the second battery cell 10b and the second battery cell 10b, so that the heat conduction distance between the first flow channel 301a and the first battery cell 10a is smaller than the heat conduction distance between the second flow channel 301b and the second battery cell 10b. This facilitates the thermal management effect of the first portion 30a on the first battery cell 10a to be better than the thermal management effect of the second portion 30b on the second battery cell 10b. Therefore, the temperature consistency of the battery cells 10 at different locations within the battery 100 is improved, that is, the battery 100 as a whole has a more uniform temperature, thereby improving the service life and reliability of the battery 100.

[0107] It should be noted that the first partition wall 2111 facing the side of the first battery cell 10a and the second partition wall 2112 facing the side of the second battery cell 10b are arranged flush, so that the side of the first wall 211 facing the battery cell 10 has better flatness, which is conducive to the placement of the battery cell 10 in the battery compartment 201.

[0108] Alternatively, in other embodiments, please refer to Figures 6 and 7 in conjunction with other drawings. Figure 6 is a partial cross-sectional view of a battery 100 provided in other embodiments of the present application, and Figure 6 shows a portion of a battery cell 10. Figure 7 is an enlarged view of point C in Figure 6. In the first direction Z, the side of the second partition wall 2112 near the battery cell 10 extends beyond the side of the first partition wall 2111 near the battery cell 10. The first portion 30a is disposed on the side of the first partition wall 2111 near the battery cell 10, and the second portion 30b is disposed on the side of the second partition wall 2112 near the battery cell 10.

[0109] It can be understood that the side of the first partition wall 2111 near the first battery cell 10a is recessed away from the first battery cell 10a, so that there is a height difference between the side of the first partition wall 2111 near the first battery cell 10a along the first direction Z and the side of the second partition wall 2112 near the second battery cell 10b along the first direction Z, thereby forming a stepped structure. In this way, the wall thickness of the first partition wall 2111 in the first direction Z (first dimension H3) is less than the wall thickness of the second partition wall 2112 in the first direction Z (second dimension H4).

[0110] This arrangement facilitates designing the dimensions of the first portion 30a in the first direction Z to be larger than the dimensions of the second portion 30b in the first direction Z. This, in turn, facilitates designing the dimensions of the first flow channel 301a in the first direction Z to be larger than the dimensions of the second flow channel 301b in the first direction Z, thereby increasing the cross-sectional area of ​​the first flow channel 301a to be larger than the cross-sectional area of ​​the second flow channel 301b. This ensures that the thermal management effect of the first portion 30a on the first battery cell 10a is superior to the thermal management effect of the second portion 30b on the second battery cell 10b. This facilitates improving the temperature consistency of the battery cells 10 at different locations within the battery 100, namely, ensuring a more uniform temperature throughout the battery 100, thereby improving the service life and reliability of the battery 100.

[0111] It should be noted that the side of the first partition wall 2111 away from the first battery cell 10a is flush with the side of the second partition wall 2112 away from the second battery cell 10b, so that the side of the first wall 211 away from the battery cell 10 has better flatness, which is conducive to the placement of the battery 100.

[0112] Alternatively, in some other embodiments, in the first direction Z, the side of the second partition wall 2112 away from the battery cell 10 extends beyond the side of the first partition wall 2111 away from the battery cell 10, the side of the first partition wall 2111 away from the battery cell 10 is provided with a first portion 30a, and the side of the second partition wall 2112 away from the battery cell 10 is provided with a second portion 30b. Furthermore, in the first direction Z, the side of the second partition wall 2112 closer to the battery cell 10 extends beyond the side of the first partition wall 2111 closer to the battery cell 10, the side of the first partition wall 2111 closer to the battery cell 10 is provided with a first portion 30a, and the side of the second partition wall 2112 closer to the battery cell 10 is provided with a second portion 30b.

[0113] In some embodiments, please refer to FIG5 and FIG7 together with other drawings. In the first direction Z, the side of the first portion 30a away from the first partition wall 2111 is flush with the side of the second portion 30b away from the second partition wall 2112 .

[0114] When the first portion 30a is disposed on the side of the first partition wall 2111 away from the battery cell 10 and the second portion 30b is disposed on the side of the second partition wall 2112 away from the battery cell 10, as shown in FIG5 and in conjunction with other figures, the side of the first portion 30a away from the first partition wall 2111 and the side of the second portion 30b away from the second partition wall 2112 are disposed flush with each other. On the one hand, the flatness of the outer surface of the battery 100 in the first direction Z can be improved, facilitating the placement of the battery 100. On the other hand, when the side of the second partition wall 2112 away from the battery cell 10 extends beyond the side of the first partition wall 2111 away from the battery cell 10, the size of the first portion 30a in the first direction Z is larger than the size of the second portion 30b in the first direction Z. Such a configuration makes it easier for the size of the first flow channel 301a in the first direction Z (the fifth dimension H7 shown below) to be larger than the size of the second flow channel 301b in the first direction Z (the sixth dimension H8 shown below), so that the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b, thereby making the thermal management effect of the first part 30a on the first battery cell 10a better than the thermal management effect of the second part 30b on the second battery cell 10b.

[0115] When the first portion 30a is disposed on the side of the first partition wall 2111 close to the battery cell 10 and the second portion 30b is disposed on the side of the second partition wall 2112 close to the battery cell 10, as shown in FIG7 and in conjunction with other figures, the side of the first portion 30a away from the first partition wall 2111 and the side of the second portion 30b away from the second partition wall 2112 are disposed flush, which, on the one hand, facilitates the placement of the battery cell 10 within the battery compartment 201. On the other hand, when the side of the second partition wall 2112 close to the battery cell 10 extends beyond the side of the first partition wall 2111 close to the battery cell 10, the size of the first portion 30a in the first direction Z is larger than the size of the second portion 30b in the first direction Z. Such a configuration makes it easier for the size of the first flow channel 301a in the first direction Z to be larger than the size of the second flow channel 301b in the first direction Z, so that the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b, thereby enabling the first part 30a to have a better thermal management effect on the first battery cell 10a than the second part 30b to have a better thermal management effect on the second battery cell 10b.

[0116] In some embodiments, referring to FIG5 and FIG7 together with other figures, in the first direction Z, the wall thickness of the first portion 30a in the first flow channel 301a close to the battery cell 10 is smaller than the wall thickness of the second portion 30b in the second flow channel 301b close to the battery cell 10.

[0117] The wall thickness of the first portion 30a in the first channel 301a close to the battery cell 10 is a third dimension H5, and the wall thickness of the second portion 30b in the second channel 301b close to the battery cell 10 is a fourth dimension H6. The third dimension H5 is smaller than the fourth dimension H6.

[0118] Such arrangement facilitates the realization of a first distance H1 between the first flow channel 301a and the side of the battery cell 10 close to the battery cell 10 and a second distance H2 between the second flow channel 301b and the side of the battery cell 10 close to the battery cell 10 in the first direction Z, thereby facilitating the realization of a better thermal management effect of the first part 30a on the first battery cell 10a than the thermal management effect of the second part 30b on the second battery cell 10b.

[0119] It should be supplemented here that the dimension of the first flow channel 301a in the first direction Z is the fifth dimension H7, and the dimension of the second flow channel 301b in the first direction Z is the sixth dimension H8.

[0120] The sum of the wall thickness of the first portion 30a at the portion of the first flow channel 301a away from the battery cell 10, the third dimension H5, and the fifth dimension H7 is the dimension of the first portion 30a in the first direction Z. The sum of the wall thickness of the first portion 30a at the portion of the first flow channel 301a away from the battery cell 10 and the third dimension H5 is the sum of the wall thicknesses of the first portion 30a on opposite sides of the first flow channel 301a along the first direction Z.

[0121] The sum of the wall thickness of the second portion 30b at the portion of the second flow channel 301b away from the battery cell 10, the fourth dimension H6, and the sixth dimension H8 is the dimension of the second portion 30b in the first direction Z. The sum of the wall thickness of the second portion 30b at the portion of the second flow channel 301b away from the battery cell 10 and the fourth dimension H6 is the sum of the wall thicknesses of the second portion 30b at opposite sides of the second flow channel 301b along the first direction Z.

[0122] In some embodiments, as shown in FIG. 5 and FIG. 7 , the fifth dimension H7 is greater than the sixth dimension H8 , such that the cross-sectional area of ​​the first flow channel 301 a is greater than the cross-sectional area of ​​the second flow channel 301 b .

[0123] In some embodiments, the dimension of the first channel 301a in the width direction of the first portion 30a is greater than the dimension of the second channel 301b in the width direction of the second portion 30b, so that the cross-sectional area of ​​the first channel 301a is greater than the cross-sectional area of ​​the second channel 301b.

[0124] As an example, as shown in Figures 4 and 5 , in the first direction Z, the side of the second partition wall 2112 away from the battery cell 10 extends beyond the side of the first partition wall 2111 away from the battery cell 10. The first portion 30a is disposed on the side of the first partition wall 2111 away from the battery cell 10, and the second portion 30b is disposed on the side of the second partition wall 2112 away from the battery cell 10. The side of the first portion 30a away from the first battery cell 10a along the first direction Z is flush with the side of the second portion 30b away from the second battery cell 10b along the first direction Z. Furthermore, in the first direction Z, the wall thickness of the first portion 30a on opposite sides of the first flow channel 301a is the same as the wall thickness of the second portion 30b on opposite sides of the second flow channel 301b. Based on this, the cross-sectional area of ​​the first flow channel 301a is larger than the cross-sectional area of ​​the second flow channel 301b, and the first distance H1 between the side of the first flow channel 301a along the first direction Z toward the first battery cell 10a and the first battery cell 10a is smaller than the second distance H2 between the side of the second flow channel 301b along the first direction Z toward the second battery cell 10b and the second battery cell 10b.

[0125] In some embodiments, please refer to FIG. 3 to FIG. 7 together with other drawings. The first flow channel 301 a is connected to at least a portion of the second flow channel 301 b.

[0126] It can be understood that the first flow channel 301a can be connected to at least a portion of the second flow channel 301b to form the same circulation loop.

[0127] Specifically, the first flow channel 301a can be completely connected to the second flow channel 301b, so that the first flow channel 301a and the second flow channel 301b form a single circulation loop. That is, the thermal management assembly 30 has at least one circulation loop, each of which can separately thermally manage the first battery cell 10a and the second battery cell 10b. Alternatively, the second portion 30b has at least two independent second flow channels 301b, at least one portion of which is connected to the first flow channel 301a to form at least one circulation loop; the remaining portion of the second flow channel 301b forms at least one circulation loop and is independent of the first flow channel 301a.

[0128] Alternatively, in other embodiments, the first flow channel 301a and the second flow channel 301b are independent of each other.

[0129] It can be understood that the first flow channel 301a constitutes at least one circulation loop, the second flow channel 301b constitutes at least one circulation loop, and the circulation loop constituted by the first flow channel 301a and the circulation loop constituted by the second flow channel 301b are independent of each other.

[0130] By adopting the above technical solution, the arrangement of the first flow channel 301a and the second flow channel 301b is very flexible.

[0131] In some embodiments, please refer to FIG6 and FIG7 together with other figures. The thermal management assembly 30 includes a first thermal management component 31. The first thermal management component 31 has a first portion 30a and a second portion 30b. The first flow channel 301a and the second flow channel 301b are connected.

[0132] A thermal management component refers to a component used for thermal management. The first thermal management component 31 can be a plate-type or tubular-type thermal management component. The first thermal management component 31 is divided into a first portion 30a and a second portion 30b. The flow channel within the first thermal management component 31 is divided into a first flow channel 301a and a second flow channel 301b. The first flow channel 301a is located in the first portion 30a, and the second flow channel 301b is located in the second portion 30b. The first flow channel 301a and the second flow channel 301b are connected, forming a single circulation loop.

[0133] With such configuration, the heat management medium can sequentially pass through the first flow channel 301 a and the second flow channel 301 b and realize a circulatory flow, thereby realizing heat management of the first battery cell 10 a and the second battery cell 10 b in sequence.

[0134] In some embodiments, referring to Figures 3 to 5 in conjunction with other figures, the thermal management assembly 30 includes a second thermal management component 32 and a third thermal management component 33. The second thermal management component 32 has a first portion 30a, and the third thermal management component 33 has a second portion 30b. The first flow channel 301a of the first portion 30a of the second thermal management component 32 and the second flow channel 301b of the second portion 30b of the third thermal management component 33 are independently provided.

[0135] The second thermal management component 32 and the third thermal management component 33 are both components for thermal management, wherein the second thermal management component 32 can be a plate-type or tube-type thermal management component, and the third thermal management component 33 can be a plate-type or tube-type thermal management component.

[0136] The first flow channel 301a of the second thermal management component 32 and the second flow channel 301b of the third thermal management component 33 are independently configured, so that the thermal management assembly 30 has at least two circulation loops, one of which is primarily used to thermally manage the first battery cell 10a through the first flow channel 301a of the second thermal management component 32, and the other is primarily used to thermally manage the second battery cell 10b through the second flow channel 301b of the third thermal management component 33. With this configuration, at least a portion of the first battery cell 10a and at least a portion of the second battery cell 10b can be thermally managed through different circulation loops, thereby facilitating separate thermal management of the first battery cell 10a and the second battery cell 10b, thereby improving the temperature consistency of the battery 100.

[0137] In some embodiments, referring to Figures 3 to 5 in conjunction with other figures, the second thermal management component 32 further includes a second portion 30b, and the first flow channel 301a of the first portion 30a of the second thermal management component 32 communicates with the second flow channel 301b of the second portion 30b of the second thermal management component 32.

[0138] It can be understood that the second heat management component 32 has a first flow channel 301 a and a second flow channel 301 b , and the first flow channel 301 a and the second flow channel 301 b of the second heat management component 32 are communicated to form a circulation loop.

[0139] In this configuration, the thermal management component 30 can have at least two circulation loops, one of which is mainly used to perform thermal management on the first battery cell 10a through the first flow channel 301a of the second thermal management component 32, and to perform thermal management on the second battery cell 10b through the second flow channel 301b of the second thermal management component 32, and the other circulation loop is mainly used to perform thermal management on the second battery cell 10b through the second flow channel 301b of the third thermal management component 33.

[0140] In this way, the distribution of the first flow channel 301a and the second flow channel 301b is very flexible.

[0141] In some embodiments, please refer to FIG. 3 to FIG. 5 in conjunction with other drawings. The second partition wall 2112 is disposed around the outer periphery of the first partition wall 2111 .

[0142] It should be noted that the first battery cell 10 a and the first partition wall 2111 are disposed opposite to each other along the first direction Z, and the second battery cell 10 b and the second partition wall 2112 are disposed opposite to each other along the first direction Z.

[0143] The first partition wall 2111 is arranged around the outer periphery of the first partition wall 2111, so that the second battery cell 10b is arranged around the outer periphery of the first battery cell 10a. Correspondingly, the second portion 30b is arranged around the outer periphery of the first portion 30a. In this way, during the use of the battery 100, the temperature of the first battery cell 10a is generally higher than that of the second battery cell 10b due to the second battery cell 10b being arranged around the outer periphery of the first battery cell 10a. The thermal management effect of the first portion 30a on the first battery cell 10a is better than the thermal management effect of the second portion 30b on the second battery cell 10b, which facilitates the thermal management component 30 to perform thermal management on the first battery cell 10a and the second battery cell 10b, thereby improving the temperature consistency of the battery 100.

[0144] Alternatively, in some other embodiments, the first partition walls 2111 and the second partition walls 2112 are sequentially distributed along the second direction, and the second direction intersects the first direction Z.

[0145] The second direction intersects the first direction Z, which means that the first direction Z and the second direction can form an angle greater than 0° and less than 180°, that is, the first direction Z and the second direction are not parallel. The first direction Z and the second direction can be perpendicular to each other, or they can be non-perpendicular. The first direction Z and the second direction can be directions that intersect on the same plane, or they can be directions on planes that are not parallel to each other, and the projection of the second direction on the plane where the first direction Z is located can intersect with the first direction Z. Correspondingly, the meaning of the intersection of the first direction Z and the third direction, and the intersection of the second direction and the third direction can also be interpreted in the same way, and will not be repeated here. As an example, the first direction Z and the second direction are perpendicular.

[0146] The second direction may be parallel to the Y axis or the X axis in FIG. 3 to FIG. 5 .

[0147] By adopting the above technical solution, the first partition wall 2111 and the second partition wall 2112 can be arranged according to the temperature difference of the battery cells 10 at different positions, which is very flexible.

[0148] In some embodiments, please refer to the figures and other figures together. The first portion 30a is welded to the first partition wall 2111, bonded to the first partition wall 2111, or integrally connected to the first partition wall 2111, and the second portion 30b is welded to the second partition wall 2112, bonded to the second partition wall 2112, or integrally connected to the second partition wall 2112. Alternatively, in other embodiments, the first portion 30a is welded to the first partition wall 2111, bonded to the first partition wall 2111, or integrally connected to the first partition wall 2111. Alternatively, in still other embodiments, the second portion 30b is welded to the second partition wall 2112, bonded to the second partition wall 2112, or integrally connected to the second partition wall 2112.

[0149] Specifically, when the first portion 30 a is bonded to the first partition wall 2111 , the first portion 30 a may be bonded to the first partition wall 2111 through an adhesive layer formed by an adhesive such as a structural adhesive.

[0150] When the second portion 30 b is bonded to the second partition wall 2112 , the second portion 30 b may be bonded to the second partition wall 2112 via an adhesive layer formed by an adhesive such as a structural adhesive.

[0151] When the first portion 30a is integrally connected to the first partition wall 2111, the first portion 30a can be integrally stamped or die-casted with the first partition wall 2111. When the second portion 30b is integrally connected to the second partition wall 2112, the second portion 30b can be integrally stamped or die-casted with the second partition wall 2112.

[0152] By adopting the above technical solution, the fixing operations of the first part 30a on the first partition wall 2111 and the fixing operations of the second part 30b on the second partition wall 2112 are both very flexible.

[0153] Referring to FIG1 and the other accompanying drawings, the electrical device provided in the embodiment of the present application includes a battery 100. The battery 100 in this embodiment is the same as the battery 100 in the previous embodiment. For details, please refer to the relevant description of the battery 100 in the previous embodiment, which will not be repeated here.

[0154] The electrical device provided in the embodiment of the present application utilizes the battery 100 described above, so that battery cells 10 at different locations within the battery 100 can be thermally managed separately through different parts of the thermal management assembly 30, thereby achieving different thermal management effects in different zones. Specifically, the first battery cell 10a with a higher temperature can be thermally managed through the first part 30a with a better thermal management effect, thereby ensuring that the first battery cell 10a and the second battery cell 10b have substantially the same temperature after thermal management. This can improve the temperature consistency of the battery cells 10 at different locations within the battery 100, that is, ensure that the battery 100 as a whole has a more balanced temperature, thereby improving the service life and reliability of the battery 100, and further improving the service life and reliability of the electrical device.

[0155] As one embodiment of the present application, as shown in Figures 2 to 5, a battery 100 includes a housing 20 and a battery cell 10 housed within the housing 20. A first wall 211 is provided on one side of the housing 20 along a first direction Z. The first wall 211 is disposed opposite the battery cell 10 along the first direction Z. A thermal management assembly 30 is provided on a side of the first wall 211 away from the battery cell 10 along the first direction Z. There are multiple battery cells 10, and the multiple battery cells 10 are divided into a first battery cell 10a and a second battery cell 10b. The first wall 211 includes a first partition wall 2111 and a second partition wall 2112. The first partition wall 2111 is disposed opposite the first battery cell 10a along the first direction Z, and the second partition wall 2112 is disposed opposite the second battery cell 10b along the first direction Z. The thermal management assembly 30 includes a first portion 30a and a second portion 30b. The first portion 30a is disposed on a side of the first partition wall 2111 away from the first battery cell 10a along the first direction Z, and the second portion 30b is disposed on a side of the second partition wall 2112 away from the second battery cell 10b along the first direction Z. The first portion 30a defines a first flow channel 301a, and the second portion 30b defines a second flow channel 301b. The first flow channel 301a is at least partially connected to the second flow channel 301b.

[0156] The first partition wall 2111 is recessed on a side away from the first battery cell 10a along the first direction Z. This creates a height difference between the side of the first partition wall 2111 away from the first battery cell 10a and the side of the second partition wall 2112 away from the second battery cell 10b along the first direction Z, thereby forming a stepped structure. This allows the first partition wall 2111 to have a smaller dimension in the first direction Z than the second partition wall 2112. In the first direction Z, the distance between the side of the first flow channel 301a closer to the first battery cell 10a along the first direction Z and the first battery cell 10a is smaller than the distance between the side of the second flow channel 301b closer to the second battery cell 10b along the first direction Z and the second battery cell 10b. The side of the first portion 30a farther from the first battery cell 10a along the first direction Z is flush with the side of the second portion 30b farther from the second battery cell 10b along the first direction Z. The dimension of the first flow channel 301a in the first direction Z is greater than the dimension of the second flow channel 301b in the first direction Z, so that the cross-sectional area of ​​the first flow channel 301a is greater than the cross-sectional area of ​​the second flow channel 301b.

[0157] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A battery (100), wherein: include: Battery cell (10); A box body (20), wherein the battery cell (10) is accommodated in the box body (20); the box body (20) is provided with a first wall (211) at an end side along a first direction (Z), and the first wall (211) includes a first partition wall (2111) and a second partition wall (2112); A thermal management component (30) comprises a first part (30a) and a second part (30b); the first part (30a) is arranged on the first partition wall (2111) and is provided with a first flow channel (301a); the second part (30b) is arranged on the second partition wall (2112) and is provided with a second flow channel (301b); In the first direction (Z), the distance between the side of the first flow channel (301a) close to the battery cell (10) and the battery cell (10) is smaller than the distance between the side of the second flow channel (301b) close to the battery cell (10) and the battery cell (10); and / or the cross-sectional area of the first flow channel (301a) is larger than the cross-sectional area of the second flow channel (301b).

2. The battery (100) according to claim 1, wherein In the first direction (Z), the wall thickness of the first partition wall (2111) is smaller than the wall thickness of the second partition wall (2112).

3. The battery (100) according to claim 2, wherein The difference between the wall thickness of the second partition wall (2112) and the wall thickness of the first partition wall (2111) is within 0.5 mm.

4. The battery (100) according to any one of claims 1 to 3, wherein: In the first direction (Z), the side of the second partition wall (2112) away from the battery cell (10) exceeds the first partition wall (2111), the first portion (30a) is arranged on the side of the first partition wall (2111) away from the battery cell (10), and the second portion (30b) is arranged on the side of the second partition wall (2112) away from the battery cell (10).

5. The battery (100) according to any one of claims 1 to 4, wherein: In the first direction (Z), the side of the second partition wall (2112) close to the battery cell (10) exceeds the first partition wall (2111), the first portion (30a) is arranged on the side of the first partition wall (2111) close to the battery cell (10), and the second portion (30b) is arranged on the side of the second partition wall (2112) close to the battery cell (10).

6. The battery (100) according to claim 4 or 5, wherein: In the first direction (Z), the side of the first portion (30a) away from the first partition wall (2111) is arranged flush with the side of the second portion (30b) away from the second partition wall (2112).

7. The battery (100) according to any one of claims 1 to 6, wherein: In the first direction (Z), the wall thickness of the first portion (30a) at the first flow channel (301a) close to the battery cell (10) is smaller than the wall thickness of the second portion (30b) at the second flow channel (301b) close to the battery cell (10).

8. The battery (100) according to any one of claims 1 to 7, wherein: The size of the first flow channel (301a) in the first direction (Z) is greater than the size of the second flow channel (301b) in the first direction (Z).

9. The battery (100) according to any one of claims 1 to 8, wherein: The dimension of the first flow channel (301a) in the width direction of the first portion (30a) is greater than the dimension of the second flow channel (301b) in the width direction of the second portion (30b).

10. The battery (100) according to any one of claims 1 to 9, wherein: The first flow channel (301a) is in communication with at least a portion of the second flow channel (301b); or, the first flow channel (301a) and the second flow channel (301b) are independent of each other.

11. The battery (100) according to claim 10, wherein The thermal management assembly (30) comprises a first thermal management component (31), wherein the first thermal management component (31) is provided with the first portion (30a) and the second portion (30b), and the first flow channel (301a) and the second flow channel (301b) are in communication.

12. The battery (100) according to claim 10, wherein The thermal management component (30) includes a second thermal management component (32) and a third thermal management component (33); the second thermal management component (32) is provided with the first portion (30a); the third thermal management component (33) is provided with the second portion (30b); the first flow channel (301a) of the first portion (30a) of the second thermal management component (32) and the second flow channel (301b) of the second portion (30b) of the third thermal management component (33) are independently arranged.

13. The battery (100) according to claim 12, wherein The second heat management component (32) is further provided with the second part (30b), and the first flow channel (301a) of the first part (30a) of the second heat management component (32) is communicated with the second flow channel (301b) of the second part (30b) of the second heat management component (32).

14. The battery (100) according to any one of claims 1 to 13, wherein: The second partition wall (2112) is arranged around the outer periphery of the first partition wall (2111); Alternatively, the first partition wall (2111) and the second partition wall (2112) are distributed sequentially along a second direction, and the second direction intersects with the first direction (Z).

15. The battery (100) according to any one of claims 1 to 14, wherein: The first part (30a) is welded or bonded or integrally connected to the first partition wall (2111); and / or the second part (30b) is welded or bonded or integrally connected to the second partition wall (2112).

16. An electrical device, wherein: Comprising a battery (100) according to any one of claims 1-15.

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