Battery and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery and a power utilization device, the power utilization device comprises the battery, and the battery comprises a battery monomer, a box body and a heat management assembly. The battery monomers are accommodated in the box body; a first wall is arranged on the end side, in the first direction, of the box body and comprises a first branch wall and a second branch wall. The thermal management assembly includes a first portion and a second portion. The first part is arranged on the first branch wall and provided with a first flow channel. The second part is arranged on the second sub-wall and is provided with a second flow channel; in the first direction, the distance between one side, close to the battery monomer, of the first flow channel and the battery monomer is smaller than the distance between one side, close to the battery monomer, of the second flow channel and the battery monomer; and / or the cross sectional area of the first runner is larger than that of the second runner. According to the arrangement, the single batteries at different positions can be subjected to heat management with different effects in a partitioned manner, so that the whole battery has relatively balanced temperature, the service life of the battery can be prolonged, and the use reliability of the battery can be improved.

Description

Technical Field

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

[0002] In the related art, 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, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar. Hybrid connection means that multiple battery cells are connected in both series and in parallel.

[0003] 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.

[0004] In some cases, the temperatures of battery cells at different positions in the battery are different, which makes the temperature consistency of the battery low, affecting the reliability and service life of the battery. Utility Model Content

[0005] In view of the above problems, the embodiments of the present application provide a battery and an electrical device, which can improve the technical problem of poor temperature consistency of the battery.

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0007] Battery cells;

[0008] A box body, in which the battery cells are accommodated; a first wall is provided at an end side of the box body along a first direction, and the first wall includes a first partition wall and a second partition wall;

[0009] The thermal management component comprises 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;

[0010] In the first direction, the distance between the first channel near the battery cell and the battery cell is smaller than the distance between the second channel near the battery cell and the battery cell; and / or the cross-sectional area of ​​the first channel is larger than the cross-sectional area of ​​the second channel.

[0011] The battery provided by the embodiment of the present application is divided into a first partition wall and a second partition wall by a first wall of the box along a first direction, and the thermal management component is divided into a first part arranged on the first partition wall and a second part arranged on the second partition wall. In addition, in the first direction, the distance between the side of the first flow channel of the first part close to the battery cell and the battery cell is smaller than the distance between the side of the second flow channel of the second part close to the battery cell and the battery cell, so that the heat conduction distance between the first flow channel and the battery cell can be smaller, thereby improving the thermal management effect of the first part on 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, so that the flow rate of the thermal management medium in the first flow channel is faster and the heat exchange efficiency is higher, thereby improving the thermal management effect of the first part on the battery cell. Based on this, the thermal management effect of the first part on the battery cell is better than the thermal management effect of the second part on the battery cell. In this way, when the temperatures of the battery cells at different positions are different, the battery cells with higher temperatures can be arranged opposite to the first partition wall to achieve thermal management through the first part; and the battery cells with lower temperatures can be arranged opposite to the second partition wall to achieve thermal management through the second part. With such an 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 in the battery, that is, make the battery as a whole have a more balanced temperature, thereby improving the battery's service life and reliability.

[0012] 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.

[0013] Such an arrangement makes it easier for the first part to have a better thermal management effect on the first battery cell than the second part to have a 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 improving the temperature consistency of the battery cells at different positions in the battery, that is, making the battery as a whole have a more balanced temperature, so as to improve the service life and reliability of the battery.

[0014] 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.

[0015] This arrangement allows the battery as a whole to have a more balanced temperature, thereby increasing the battery's service life and reliability.

[0016] 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 a side of the first partition wall away from the battery cell, and the second portion is disposed on a side of the second partition wall away from the battery cell;

[0017] And / or, in the first direction, a side of the second partition wall close to the battery cell exceeds the first partition wall, the first portion is arranged on a side of the first partition wall close to the battery cell, and the second portion is arranged on a side of the second partition wall close to the battery.

[0018] Such an arrangement facilitates improving the temperature consistency of battery cells at different positions in 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.

[0019] 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.

[0020] 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.

[0021] In some embodiments, in the first direction, a wall thickness of the first portion in the first channel close to the battery cell is smaller than a wall thickness of the second portion in the second channel close to the battery cell.

[0022] Such an arrangement makes it easy to achieve a first distance between the first flow channel and the battery cell on one side close to the battery cell in the first direction and a second distance between the second flow channel and the battery cell on one side close to 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.

[0023] 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.

[0024] By adopting the above technical solution, the arrangement of the first flow channel and the second flow channel is very flexible.

[0025] In some embodiments, the thermal management assembly includes a first thermal management component, the first thermal management component has a first portion and a second portion, and the first flow channel is in communication with the second flow channel.

[0026] With such arrangement, the heat management medium can sequentially pass through the first flow channel and the second flow channel and realize a circulatory flow, thereby realizing heat management of the first battery cell and the second battery cell in sequence.

[0027] In some embodiments, the thermal management component 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 independently arranged.

[0028] With such an 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 the thermal management of the first battery cells and the second battery cells in separate areas, which is beneficial to improving the temperature consistency of the battery.

[0029] In some embodiments, the second thermal management component is further provided with 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.

[0030] In this way, the distribution of the first flow channel and the second flow channel is very flexible.

[0031] In some embodiments, the second partition wall is disposed around the outer periphery of the first partition wall;

[0032] Alternatively, the first partition wall and the second partition wall are sequentially distributed along the second direction, and the second direction intersects the first direction.

[0033] By adopting the above technical solution, the first partition wall and the second partition wall can be arranged according to the temperature difference of the battery cells at different positions, which is very flexible.

[0034] In some embodiments, the first part is welded or bonded or integrally connected to the first partition wall; and / or the second part is welded or bonded or integrally connected to the second partition wall.

[0035] 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.

[0036] In a second aspect, an embodiment of the present application provides an electrical device, including a battery.

[0037] 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 for thermal management 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 further improve the service life and reliability of the electrical device.

[0038] 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

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying any creative labor.

[0040] Figure 1 A schematic diagram of a vehicle provided for some embodiments of the present application;

[0041] Figure 2 An exploded schematic diagram of a battery provided in some embodiments of the present application;

[0042] Figure 3 A partial three-dimensional structural diagram of a battery provided in some embodiments of the present application;

[0043] Figure 4 for Figure 3 Sectional view of AA in the middle;

[0044] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0045] Figure 6 A cross-sectional view of a battery provided for some other embodiments of the present application;

[0046] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0047] Among them, the reference numerals in the figure are:

[0048] 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 first flow channel; S2-cross section of second flow channel; Z-first direction. DETAILED DESCRIPTION

[0049] Embodiments of the present application are described in detail below, and examples of the embodiments 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.

[0050] In the description 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 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 should not be understood as a limitation on the present application.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0052] In the description of the present application, "plurality" means more than two, and unless otherwise clearly and specifically defined, "more than two" includes two. Accordingly, "multiple groups" means more than two groups, including two groups.

[0053] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the description of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0055] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned 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 includes all technical solutions falling within the scope of the claims.

[0056] In the related art, 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, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar. Hybrid connection means that multiple battery cells are connected in both series and in parallel.

[0057] 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.

[0058] 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 temperature consistency of the battery low, affecting the battery's reliability and service life.

[0059] For example, a battery includes battery cells located in the middle and battery cells located on the periphery. Metal structures are arranged close to the battery cells located on the periphery so that the battery cells located on the periphery can conduct heat through the metal structures, and the heat of the battery cells located on the periphery can be more easily conducted to the outside. The overall thermal management effect of the thermal management system is consistent, so that the temperature of the battery cells located on the periphery will be lower than the temperature of the battery cells located in the middle, and the temperature consistency of the battery is poor.

[0060] Based on the above considerations, the embodiment of the present application provides a battery and an electric device, wherein the first wall of the box along the first direction is divided into a first partition wall and a second partition wall, and the thermal management component is divided into a first part arranged on the first partition wall and a second part arranged on the second partition wall. In addition, in the first direction, the distance between the side of the first flow channel of the first part close to the battery cell and the battery cell is smaller than the distance between the side of the second flow channel of the second part close to the battery cell and the battery cell, so that the heat conduction distance between the first flow channel and the battery cell can be smaller, thereby improving the thermal management effect of the first part on 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, so that the flow rate of the thermal management medium in the first flow channel is faster and the heat exchange efficiency is higher, thereby improving the thermal management effect of the first part on the battery cell. Based on this, the thermal management effect of the first part on the battery cell is better than the thermal management effect of the second part on the battery cell. In this way, when the temperatures of the battery cells at different positions are different, the battery cells with higher temperatures can be arranged opposite to the first partition wall to achieve thermal management through the first part; and the battery cells with lower temperatures can be arranged opposite to the second partition wall to achieve thermal management through the second part. With such a configuration, 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 in the battery, so that the battery as a whole has a more balanced temperature, thereby improving the battery's service life and reliability.

[0061] 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.

[0062] 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.

[0063] For ease of description, the embodiments of the present application are described using an electrical device as a vehicle as an example.

[0064] In some embodiments, see Figure 1 , Figure 1 Schematic diagram of a vehicle 1000 provided for some embodiments of the present application. The above-mentioned battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed 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 be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0065] In some embodiments, the battery 100 can be used 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 .

[0066] In some embodiments, see Figure 2 , Figure 2 The exploded schematic diagram of the 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.

[0067] The box body 20 has a battery compartment 201 inside. The battery compartment 201 inside the box body 20 is used to accommodate the battery cells 10 .

[0068] 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, which cover each other and together define the battery compartment 201. 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, which covers the open side of the box body 21, so that the box body 21 and the cover body 22 together define the 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 opening side of the box body 21 is covered with the opening 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.

[0069] In some embodiments, see Figure 2, multiple battery cells 10 can 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 is directly accommodated in the battery compartment 201 of the box 20. In other embodiments, multiple battery cells 10 can also be connected in series, in parallel or in a mixed connection first, and arranged and fixed to form a battery module, and the battery module is accommodated in the battery compartment 201 of the box 20. In some other embodiments, multiple battery cells 10 can also be connected in series, in parallel or in a mixed connection first, and arranged and fixed to form multiple battery modules, and multiple battery modules are then connected in series, in parallel or in a mixed connection to form a whole, and accommodated in the battery compartment 201 of the box 20.

[0070] As an example, a plurality of battery cells 10 may be fixed by cable ties, etc. 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.

[0071] In some embodiments, the box 20 of the battery 100 can be used as part of the chassis structure of the vehicle 1000. For example, part of the box 20 can become at least a part of the chassis of the vehicle 1000, or part of the box 20 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0072] The battery cell 10 involved in the embodiment of the present application refers to the smallest unit for storing and outputting electric energy. The battery cell 10 may be a secondary battery or a primary battery. The battery cell 10 may 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 may be cylindrical, flat, rectangular, or in other shapes.

[0073] Please also read Figures 3 to 5 , and combined with other drawings. Among them, Figure 3 A partial structural diagram of a battery 100 provided in some embodiments of the present application, Figure 4 for Figure 3 A cross-sectional view along AA, and Figure 4 A portion of the battery cell 10 is shown in FIG. Figure 5 for Figure 4The 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 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 some possible designs, in the first direction Z, the distance between the side of the first channel 301a close to the battery cell 10 and the battery cell 10 is smaller than the distance between the side of the second channel 301b close to the battery cell 10 and the battery cell 10, and the cross-sectional area of ​​the first channel 301a is larger than the cross-sectional area of ​​the second channel 301b; or, in other possible designs, in the first direction Z, the distance between the side of the first channel 301a close to the battery cell 10 and the battery cell 10 is smaller than the distance between the side of the second 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 channel 301a is larger than the cross-sectional area of ​​the second channel 301b.

[0074] 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 .

[0075] The first wall 211 is a solid wall of the box body 20. The first wall 211 is provided at one end of the box body 20 along the first direction Z; or, the first wall 211 is provided at both opposite ends of the box body 20 along the first direction Z. It can be understood that the first wall 211 is provided at the end side of the battery compartment 201 along the first direction Z, that is, the first wall 211 is provided at the end side of the battery cell 10 along the first direction Z, so as to be arranged opposite to the battery cell 10 along the first direction Z. Among them, the first wall 211 can be provided on the box body 21 of the box body 20, and can also be provided on the cover body 22 of the box body 20.

[0076] Among them, Figures 3 to 5 As shown, the first direction Z is parallel to the Z axis. Figure 3 Also shown in the figure is the X-axis and the Y-axis. The X-axis and the Y-axis are perpendicular, the X-axis and the Z-axis are perpendicular, and the Y-axis and the Z-axis are perpendicular. The X-axis, the Y-axis, and the Z-axis constitute a spatial coordinate system.

[0077] The first wall 211 may include a plurality of partition walls, wherein the two partition walls are respectively the first partition wall 2111 and the second partition wall 2112. The first partition wall 2111 and the second partition wall 2112 are respectively two parts of the first wall 211. Correspondingly, the battery cell 10 may be provided in plurality, and the plurality of battery cells 10 may be divided into at least two parts, wherein one part of the two parts is the first battery cell 10a, and the other part is the second battery cell 10b. The first partition wall 2111 is arranged opposite to the first battery cell 10a along the first direction Z, and the second partition wall 2112 is arranged opposite to the second battery cell 10b along the first direction Z.

[0078] The thermal management component 30 refers to a component structure for thermal management. A flow channel is provided inside the thermal management component 30, and the flow channel is a channel for circulating the thermal management medium of the thermal management component 30. Specifically, when the thermal management medium circulates in the flow channel, it can exchange heat with the battery cell 10, thereby achieving thermal management of the battery cell 10.

[0079] The thermal management component 30 performs thermal management on the battery cell 10, which can be specifically heating the battery cell 10 or cooling the battery cell 10. Specifically, the thermal management medium can be a medium with a higher temperature. When the thermal management medium exchanges heat with the battery cell 10, the temperature of the battery cell 10 can be increased. The thermal management medium can also be a medium with a lower temperature. When the thermal management medium exchanges heat with the battery cell 10, the battery cell 10 can be cooled. The thermal management medium can be a medium in the form of liquid, gas, etc. As an example, the thermal management medium is a coolant.

[0080] The thermal management component 30 may include multiple parts, wherein the two parts are respectively a first part 30a and a second part 30b. The flow channel in the first part 30a is the first flow channel 301a, and the flow channel in the second part 30b is the second flow channel 301b. It can be understood that when the thermal management medium flows in 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 in 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.

[0081] It should be supplemented here that the first flow channel 301a of the first part 30a can form the same circulation loop with at least part of the second flow channel 301b of the second part 30b, that is, the first flow channel 301a is connected to at least part of the second flow channel 301b. Specifically, the first flow channel 301a of the first part 30a completely forms the same circulation loop with the second flow channel 301b of the second part 30b, that is, the first flow channel 301a and the second flow channel 301b are connected; or, the second part 30b has at least two independent second flow channels 301b, at least part of the second flow channel 301b of the second part 30b is connected to the first flow channel 301a, and the rest of the second flow channels 301b of the second part 30b are independent of the first flow channel 301a. In other embodiments, the first flow channel 301a of the first part 30a and the second flow channel 301b of the second part 30b can be set independently of each other.

[0082] like Figure 5 As shown, 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.

[0083] like Figure 4 and Figure 5 As shown, Figure 4 and Figure 5 The cross-sectional area of ​​the first flow channel 301a refers to the area of ​​the cross-sectional area 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-sectional area S2 of the second flow channel 301b.

[0084] Among them, 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, the width and the thickness of the first flow channel 301a are perpendicular to each other. 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 direction and the thickness direction of the first flow channel 301a.

[0085] Correspondingly, 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, the width and the 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 direction and the thickness direction of the second flow channel 301b.

[0086] 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 some other possible designs, the first distance H1 is smaller than the second distance H2. Alternatively, in some 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.

[0087] By making the first distance H1 smaller than the second distance H2, the heat conduction distance between the first battery cell 10a and the heat management medium in the first flow channel 301a is smaller than the heat conduction distance between the second battery cell 10b and the heat management medium in the second flow channel 301b. In this way, compared with the heat exchange medium in the second battery cell 10b and the second flow channel 301b, the first battery cell 10a and the heat management medium in the first flow channel 301a can conduct heat faster to exchange heat faster. Therefore, compared with the second part 30b, the first part 30a can have a higher thermal management effect and efficiency on the first battery cell 10a.

[0088] By making the cross-sectional area of ​​the first flow channel 301a larger than the cross-sectional area of ​​the second flow channel 301b, the flow rate of the heat management medium in the first flow channel 301a can be greater than the flow rate of the heat management medium in the second flow channel 301b. In this way, the heat exchange efficiency between the first battery cell 10a and the heat management medium in the first flow channel 301a is higher than that between the heat exchange medium in the second battery cell 10b and the second flow channel 301b. Thus, compared with the second part 30b, the first part 30a can have a higher thermal management effect and efficiency on the first battery cell 10a.

[0089] 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 a first wall 211 of a box body 20 along a 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 part 30a 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 of the second part 30b close to the battery cell 10 and the battery cell 10, that is, the first distance H1 is smaller than the second distance H2, so that the heat conduction distance between the first flow channel 301a and the battery cell 10 can be smaller, thereby improving the thermal management effect of the first part 30a on 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, so that the flow rate of the thermal management medium in the first flow channel 301a is faster and the heat exchange efficiency is higher, thereby improving the thermal management effect of the first part 30a on the battery cell 10. Based on this, the thermal management effect of the first part 30a on the battery cell 10 is better than the thermal management effect of the second part 30b on the battery cell 10. In this way, when the temperatures of the battery cells 10 at different positions 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 as to achieve thermal management through the first part 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 as to achieve thermal management through the second part 30b.

[0090] In this way, the battery cells 10 at different positions can be thermally managed by different parts of the thermal management component 30, so as to perform thermal management with different effects in different regions. Specifically, the first battery cell 10a with a higher temperature can be thermally managed by the first part 30a with a better thermal management effect, so that the first battery cell 10a and the second battery cell 10b after thermal management can have basically the same temperature to a certain extent. As described above, the temperature consistency of the battery cells 10 at different positions in the battery 100 can be improved, 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.

[0091] In some embodiments, please refer to Figure 4 and Figure 5 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 .

[0092] 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.

[0093] 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, on the one hand, it is convenient to design the size of the first part 30a in the first direction Z to be larger than the size of the second part 30b in the first direction Z, and further facilitate 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 can be larger than the cross-sectional area of ​​the second flow channel 301b. In this way, 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. 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 thermal conduction distance between the first flow channel 301a and the first battery cell 10a is smaller than the thermal conduction distance between the second flow channel 301b and the second battery cell 10b, 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.

[0094] 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 be thermally managed with different effects through the first part 30a and the second part 30b respectively, thereby facilitating improving the temperature consistency of the battery cells 10 at different positions in the battery 100, that is, making the battery 100 as a whole have a more balanced temperature, so as to improve the service life and reliability of the battery 100.

[0095] In some embodiments, please refer to Figure 4 and Figure 5 , and in combination with other drawings, 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.

[0096] It can be understood that 0<H4-H3≤0.5mm. Among them, 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.

[0097] By such arrangement, there is 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 be thermally managed with different effects through the first part 30a and the second part 30b respectively, 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.

[0098] In some embodiments, please refer to Figure 4 and Figure 5 In the first direction Z, the side of the second partition wall 2112 away from the battery cell 10 exceeds 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.

[0099] 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 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 have a height difference to form a step structure. In this way, the wall thickness (first dimension H3) of the first partition wall 2111 in the first direction Z is smaller than the wall thickness (second dimension H4) of the second partition wall 2112 in the first direction Z.

[0100] Such arrangement, on the one hand, facilitates the design of the size of the first part 30a in the first direction Z to be larger than the size of the second part 30b in the first direction Z, and further facilitates 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 can be larger than the cross-sectional area of ​​the second flow channel 301b. In this way, 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. On the other hand, 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, so that the heat management effect of the first part 30a on the first battery cell 10a is better than the heat management effect of the second part 30b on the second battery cell 10b. Therefore, it is convenient to improve 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.

[0101] It should be noted that the first partition wall 2111 facing the first battery cell 10a and the second partition wall 2112 facing 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 placing the battery cell 10 in the battery compartment 201.

[0102] Alternatively, in some other embodiments, see Figure 6 and Figure 7 , and combined with other drawings. Among them, Figure 6 Partial cross-sectional views of batteries 100 provided in some other embodiments of the present application, Figure 6 A portion of the battery cell 10 is shown in FIG. Figure 7 for Figure 6 In the first direction Z, the side of the second partition wall 2112 close to the battery cell 10 exceeds the side of the first partition wall 2111 close to the battery cell 10, 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 100.

[0103] It can be understood that the side of the first partition wall 2111 close to the first battery cell 10a is recessed away from the first battery cell 10a, so that the side of the first partition wall 2111 close to the first battery cell 10a along the first direction Z and the side of the second partition wall 2112 close to the second battery cell 10b along the first direction Z have a height difference to form a step structure. In this way, the wall thickness (first dimension H3) of the first partition wall 2111 in the first direction Z is smaller than the wall thickness (second dimension H4) of the second partition wall 2112 in the first direction Z.

[0104] Such a configuration facilitates the design of the size of the first part 30a in the first direction Z to be larger than the size of the second part 30b in the first direction Z, and further facilitates 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. In this way, 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. Therefore, it is convenient to improve 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.

[0105] 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 a better flatness, which is conducive to the placement of the battery 100.

[0106] Alternatively, in some other embodiments, in the first direction Z, the side of the second partition wall 2112 away from the battery cell 10 exceeds 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. Also, in the first direction Z, the side of the second partition wall 2112 close to the battery cell 10 exceeds the side of the first partition wall 2111 close to the battery cell 10, the side of the first partition wall 2111 close to the battery cell 10 is provided with a first portion 30a, and the side of the second partition wall 2112 close to the battery 100 is provided with a second portion 30b.

[0107] In some embodiments, please refer to Figure 5 and Figure 7 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 .

[0108] When the first portion 30a is disposed on a side of the first partition wall 2111 away from the battery cell 10, and the second portion 30b is disposed on a side of the second partition wall 2112 away from the battery cell 10, as shown in FIG. Figure 5 As shown, and in combination with other drawings, by arranging the side of the first part 30a away from the first partition wall 2111 and the side of the second part 30b away from the second partition wall 2112 flushly, on the one hand, the flatness of the outer surface of the battery 100 in the first direction Z can be improved, which is conducive to 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 exceeds the side of the first partition wall 2111 away from the battery cell 10, the size of the first part 30a in the first direction Z is greater than the size of the second part 30b in the first direction Z. In this way, it is convenient for the size of the first flow channel 301a in the first direction Z (the fifth size H7 shown below) to be greater than the size of the second flow channel 301b in the first direction Z (the sixth size H8 shown below), so that the cross-sectional area of ​​the first flow channel 301a can be greater than the cross-sectional area of ​​the second flow channel 301b, 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.

[0109] When the first portion 30a is disposed on a side of the first partition wall 2111 close to the battery cell 10, and the second portion 30b is disposed on a side of the second partition wall 2112 close to the battery cell 10, as shown in FIG. Figure 7 As shown, and in combination with other drawings, the side of the first part 30a away from the first partition wall 2111 and the side of the second part 30b away from the second partition wall 2112 are arranged flush, which, on the one hand, facilitates the placement of the battery cell 10 in the battery compartment 201. On the other hand, when the side of the second partition wall 2112 close to the battery cell 10 exceeds the side of the first partition wall 2111 close to the battery cell 10, the size of the first part 30a in the first direction Z is greater than the size of the second part 30b in the first direction Z. Such an arrangement facilitates the size of the first flow channel 301a in the first direction Z to be greater 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 greater than the cross-sectional area of ​​the second flow channel 301b, 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.

[0110] In some embodiments, please refer to Figure 5 and Figure 7 In the first direction Z, the wall thickness of the first portion 30a in the first channel 301a close to the battery cell 10 is smaller than the wall thickness of the second portion 30b in the second channel 301b close to the battery cell 10.

[0111] 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.

[0112] Such arrangement makes it easy to achieve 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 and the battery cell 10 in the first direction Z, thereby making it easy to achieve that the thermal management effect of the first part 30a on the first battery cell 10a is better than the thermal management effect of the second part 30b on the second battery cell 10b.

[0113] It should be supplemented here that the dimension of the first flow channel 301a in the first direction Z is a fifth dimension H7, and the dimension of the second flow channel 301b in the first direction Z is a sixth dimension H8.

[0114] The sum of the wall thickness of the first portion 30a at 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 first flow channel 301a away from the battery cell 10 and the third dimension H5 is the sum of the wall thickness of the first portion 30a at two opposite sides of the first flow channel 301a along the first direction Z.

[0115] 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 thickness of the second portion 30b at opposite sides of the second flow channel 301b along the first direction Z.

[0116] In some embodiments, Figure 5 and Figure 7 As shown, the fifth dimension H7 is greater than the sixth dimension H8, 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.

[0117] 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.

[0118] As an example, Figure 4 and Figure 5As shown, in the first direction Z, the side of the second partition wall 2112 away from the battery cell 10 exceeds the side of the first partition wall 2111 away from the battery cell 10, the first part 30a is arranged on the side of the first partition wall 2111 away from the battery cell 10, and the second part 30b is arranged on the side of the second partition wall 2112 away from the battery cell 10. The side of the first part 30a away from the first battery cell 10a along the first direction Z is flush with the side of the second part 30b away from the second battery cell 10b along the first direction Z. In addition, in the first direction Z, the wall thickness of the first part 30a on the opposite sides of the first flow channel 301a is the same as the wall thickness of the second part 30b on the opposite sides of the second flow channel 301b. Based on this, the cross-sectional area of ​​the first flow channel 301a is greater 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 less 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.

[0119] In some embodiments, please refer to Figures 3 to 7 , and in combination with other drawings, the first flow channel 301a is connected to at least a portion of the second flow channel 301b.

[0120] 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.

[0121] 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 constitute the same circulation loop. That is, the thermal management component 30 has at least one circulation loop, and each circulation loop can perform thermal management on the first battery cell 10a and the second battery cell 10b respectively. Alternatively, the second part 30b has at least two independent second flow channels 301b, at least one part of the second flow channel 301b is connected to the first flow channel 301a to form at least one circulation loop; the remaining part of the second flow channel 301b constitutes at least one circulation loop and is independent of the first flow channel 301a.

[0122] Alternatively, in some other embodiments, the first flow channel 301a and the second flow channel 301b are independent of each other.

[0123] 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.

[0124] By adopting the above technical solution, the arrangement of the first flow channel 301a and the second flow channel 301b is very flexible.

[0125] In some embodiments, please refer to Figure 6 and Figure 7 , and in combination with other drawings. The thermal management assembly 30 includes a first thermal management component 31, the first thermal management component 31 is provided with a first portion 30a and a second portion 30b, and the first flow channel 301a is connected to the second flow channel 301b.

[0126] The thermal management component refers to a component used for thermal management. Among them, the first thermal management component 31 can be a plate-type or tubular thermal management component. The first thermal management component 31 is divided into a first part 30a and a second part 30b, and the flow channel in 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 arranged in the first part 30a, and the second flow channel 301b is arranged in the second part 30b. The first flow channel 301a and the second flow channel 301b are connected so that the first flow channel 301a and the second flow channel 301b constitute the same circulation loop.

[0127] 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 cyclic flow, thereby sequentially realizing heat management of the first battery cell 10 a and the second battery cell 10 b .

[0128] In some embodiments, please refer to Figures 3 to 5 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 is provided with a first portion 30a, the third thermal management component 33 is provided with a second portion 30b, and 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.

[0129] The second thermal management component 32 and the third thermal management component 33 are components for thermal management, wherein the second thermal management component 32 may be a plate-type or tube-type thermal management component, and the third thermal management component 33 may be a plate-type or tube-type thermal management component.

[0130] 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 arranged, so that the thermal management component 30 has 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 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. In this way, at least part of the first battery cell 10a and at least part of the second battery cell 10b can be thermally managed through different circulation loops, so that the first battery cell 10a and the second battery cell 10b can be thermally managed in different areas, which is conducive to improving the temperature consistency of the battery 100.

[0131] In some embodiments, please refer to Figures 3 to 5 The second heat management component 32 is further provided with a second portion 30b, and the first flow channel 301a of the first portion 30a of the second heat management component 32 is communicated with the second flow channel 301b of the second portion 30b of the second heat management component 32.

[0132] It can be understood that the second heat management component 32 has a first flow channel 301a and a second flow channel 301b, and the first flow channel 301a and the second flow channel 301b of the second heat management component 32 are connected to form a circulation loop.

[0133] In this way, the thermal management component 30 can have at least two circulation loops, one of which is mainly used to thermally manage the first battery cell 10a through the first flow channel 301a of the second thermal management component 32, and to thermally manage 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 thermally manage the second battery cell 10b through the second flow channel 301b of the third thermal management component 33.

[0134] In this way, the distribution of the first flow channel 301a and the second flow channel 301b is very flexible.

[0135] In some embodiments, please refer to Figures 3 to 5 , and in combination with other drawings, the second partition wall 2112 is disposed around the outer periphery of the first partition wall 2111 .

[0136] 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.

[0137] The second battery cell 10b is arranged around the periphery of the first battery cell 10a by the first partition wall 2111. Correspondingly, the second part 30b is arranged around the periphery of the first part 30a. In this way, during the use of the battery 100, based on the second battery cell 10b being arranged around the periphery of the first battery cell 10a, the temperature of the first battery cell 10a is generally higher than that of the second battery cell 10b. The thermal management effect of the first part 30a on the first battery cell 10a is better than the thermal management effect of the second part 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.

[0138] Alternatively, in some other embodiments, the first partition wall 2111 and the second partition wall 2112 are sequentially distributed along the second direction, and the second direction intersects with the first direction Z.

[0139] The second direction intersects with 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 meanings 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, which will not be repeated here. As an example, the first direction Z and the second direction are perpendicular.

[0140] The second direction may be parallel to Figures 3 to 5 The Y-axis or X-axis in the diagram.

[0141] 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.

[0142] In some embodiments, please refer to the figures together with other drawings. The first part 30a is welded to the first partition wall 2111 or bonded to the first partition wall 2111 or connected to the first partition wall 2111 as a whole, and the second part 30b is welded to the second partition wall 2112 or bonded to the second partition wall 2112 or connected to the second partition wall 2112 as a whole. Alternatively, in other embodiments, the first part 30a is welded to the first partition wall 2111 or bonded to the first partition wall 2111 or connected to the first partition wall 2111 as a whole. Alternatively, in still other embodiments, the second part 30b is welded to the second partition wall 2112 or bonded to the second partition wall 2112 or connected to the second partition wall 2112 as a whole.

[0143] 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 via an adhesive layer formed by an adhesive such as a structural adhesive.

[0144] 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.

[0145] When the first part 30a is integrally connected to the first partition wall 2111, the first part 30a can be integrally stamped or die-casted with the first partition wall 2111. When the second part 30b is integrally connected to the second partition wall 2112, the second part 30b can be integrally stamped or die-casted with the second partition wall 2112.

[0146] 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.

[0147] See also Figure 1 , and in combination with other drawings. The electric 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.

[0148] The electric device provided in the embodiment of the present application adopts the battery 100 mentioned above, so that the battery cells 10 at different positions in the battery 100 can be thermally managed respectively through different parts of the thermal management component 30, so as to perform thermal management with different effects in different areas. 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, so that the first battery cell 10a and the second battery cell 10b after thermal management can have basically the same temperature to a certain extent. As described above, the temperature consistency of the battery cells 10 at different positions in the battery 100 can be improved, 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, and further improve the service life and reliability of the electric device.

[0149] As one of the embodiments of this application, Figures 2 to 5As shown, the battery 100 includes a box body 20 and a battery cell 10 contained in the box body 20. A first wall 211 is provided on one side of the box body 20 along the first direction Z, and the first wall 211 is arranged opposite to the battery cell 10 along the first direction Z. A thermal management component 30 is provided on the 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, and the first partition wall 2111 is arranged opposite to the first battery cell 10a along the first direction Z, and the second partition wall 2112 is arranged opposite to 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, wherein 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 is provided with a first flow channel 301a, and the second portion 30b is provided with a second flow channel 301b. The first flow channel 301a is connected to at least a portion of the second flow channel 301b.

[0150] The first partition wall 2111 is recessed on one side away from the first battery cell 10a along the first direction Z, so that the side of the first partition wall 2111 away from the first battery cell 10a along the first direction Z has a height difference with the side of the second partition wall 2112 away from the second battery cell 10b along the first direction Z, so as to form a step structure, so that the size of the first partition wall 2111 in the first direction Z is smaller than the size of the second partition wall 2112 in the first direction Z. In the first direction Z, 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 is smaller than 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. The side of the first part 30a away from the first battery cell 10a along the first direction Z is flush with the side of the second part 30b away 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.

[0151] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: Battery cells; A box body, in which the battery cells are accommodated; The box body is provided with a first wall at an end side along the first direction, wherein the first wall includes a first partition wall and a second partition wall; The thermal management component comprises 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; 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.

2. The battery according to claim 1, characterized in that In the first direction, the wall thickness of the first partition wall is smaller than the wall thickness of the second partition wall.

3. The battery according to claim 2, characterized in that 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.

4. The battery according to claim 1, characterized in that 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 arranged on a side of the first partition wall away from the battery cell, and the second portion is arranged on a side of the second partition wall away from the battery cell; And / or, in the first direction, a side of the second partition wall close to the battery cell exceeds the first partition wall, the first portion is arranged on a side of the first partition wall close to the battery cell, and the second portion is arranged on a side of the second partition wall close to the battery.

5. The battery according to claim 4, characterized in that 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.

6. The battery according to any one of claims 1 to 5, characterized in that: 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.

7. The battery according to any one of claims 1 to 5, characterized in that: The first flow channel is communicated with at least a portion of the second flow channel; or, the first flow channel and the second flow channel are independent of each other.

8. The battery according to claim 7, characterized in that The thermal management assembly includes a first thermal management component, the first thermal management component is provided with the first part and the second part, and the first flow channel is communicated with the second flow channel.

9. The battery according to claim 7, characterized in that The thermal management component includes a second thermal management component and a third thermal management component, the second thermal management component is provided with the first part, the third thermal management component is provided with the 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 independently arranged.

10. The battery according to claim 9, characterized in that The second heat management component is further provided with the second portion, and the first flow channel of the first portion of the second heat management component is communicated with the second flow channel of the second portion of the second heat management component.

11. The battery according to any one of claims 1 to 5, characterized in that: The second partition wall is arranged around the outer periphery of the first partition wall; Alternatively, the first partition walls and the second partition walls are sequentially distributed along a second direction, and the second direction intersects with the first direction.

12. The battery according to any one of claims 1 to 5, characterized in that: The first part is welded or bonded or integrally connected to the first partition wall; and / or the second part is welded or bonded or integrally connected to the second partition wall.

13. An electrical device, characterized in that: Comprising a battery according to any one of claims 1-12.

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