Battery monomer, thermal management component, battery and electric equipment

Abstract

The invention discloses a battery monomer, a heat management component, a battery and electric equipment. Relates to the technical field of batteries. The battery monomer comprises a shell and an electrode assembly, and the electrode assembly is accommodated in the shell. Wherein a heat exchange runner used for containing a heat exchange medium is formed in the wall of the shell. Due to the design, the distance between the heat exchange medium and the accommodating cavity for accommodating the electrode assembly in the shell is closer, the heat exchange effect of the heat exchange medium on the battery monomer is improved, the reliability of the battery monomer is improved, and the reliability of the battery is further improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a thermal management component, a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] How to improve battery reliability is an urgent problem to be solved in battery technology. Summary of the invention

[0004] In view of the above problems, the present application provides a battery cell, a thermal management component, a battery and an electrical device.

[0005] In a first aspect, the present application provides a battery cell, the battery cell comprising a housing and an electrode assembly, wherein the electrode assembly is accommodated in the housing, wherein a heat exchange channel for accommodating a heat exchange medium is formed on a wall of the housing.

[0006] In the technical solution of the embodiment of the present application, the wall of the shell is formed with a heat exchange channel for accommodating a heat exchange medium. When other factors affecting the heat exchange effect of the battery cell are constant, such a design makes the distance between the heat exchange medium and the accommodating cavity in the shell for accommodating the electrode assembly closer, thereby improving the heat exchange effect of the heat exchange medium on the battery cell, improving the reliability of the battery cell, and further improving the reliability of the battery.

[0007] In some embodiments, the heat exchange channel includes an inlet and an outlet, and the inlet and the outlet are disposed on the same wall of the shell.

[0008] In the above solution, the inlet and outlet of the heat exchange flow channel are arranged on the same wall of the shell. Such a design can, on the one hand, simplify the manufacturing and installation process of the battery cell and reduce the manufacturing and assembly costs. On the other hand, it can reduce the assembly space required when the battery cell cooperates with other components in the battery, which is conducive to improving the energy density of the battery.

[0009] In some embodiments, the housing includes a first wall and a second wall disposed adjacent to each other, at least a portion of the heat exchange channel is formed on the first wall, and the inlet and the outlet are disposed on the second wall.

[0010] In the above solution, the outer shell includes a first wall and a second wall arranged adjacent to each other. At least a part of the heat exchange flow path is formed in the first wall, and the inlet and the outlet are arranged on the second wall. On the one hand, the positions of the inlet and the outlet can be flexibly adjusted according to the assembly environment in the battery, so that the battery cell can be adapted to the assembly of more batteries. On the other hand, the structure of the battery can be simplified, which is beneficial to saving the internal space of the battery to improve the energy density of the battery. On the other hand, the heat exchange area of the heat exchange flow path in the first wall can be made larger, improving the heat exchange effect of the battery cell, and further improving the reliability of the battery.

[0011] In some embodiments, the first wall is the wall with the largest area in the outer shell.

[0012] In the above solution, arranging the heat exchange flow path in the first wall, which is the wall with the largest area in the outer shell, is beneficial to increasing the heat exchange area of the heat exchange flow path, and further improving the heat exchange effect of the battery cell.

[0013] In some embodiments, the first wall includes a first sub-wall and a second sub-wall. The first sub-wall and the second sub-wall are arranged at intervals in a first direction to form a first gap. The inlet and the outlet communicate with the first gap, and the first direction is parallel to the thickness direction of the first wall.

[0014] In the above solution, the first wall includes a first sub-wall and a second sub-wall. The first sub-wall and the second sub-wall are arranged at intervals in a first direction to form a first gap. At least part of the heat exchange flow path can be arranged in the first gap. On the one hand, there is no need to install a seal in the first direction to improve the sealing performance of the heat exchange flow path, saving the internal space of the battery cell to a certain extent and being beneficial to improving the energy density of the battery cell. On the other hand, the first gap can define the assembly space of the heat exchange flow path, which is beneficial to reducing the design, manufacturing and assembly difficulties of the heat exchange flow path.

[0015] In some embodiments, the outer shell further includes a third wall. The third wall is arranged opposite to the second wall in a second direction. The third wall, the second wall, the first sub-wall and the second sub-wall enclose a first cavity. The inlet and the outlet communicate with the first cavity, and the second direction is perpendicular to the first direction.

[0016] In the above solution, the third wall, the second wall, the first sub-wall and the second sub-wall enclose a first cavity, and the inlet and the outlet communicate with the first cavity. Such a design, on the one hand, can simplify the structure of the battery cell, reduce the number of external pipelines and heat exchange equipment, and reduce the manufacturing cost. On the other hand, arranging the heat exchange flow path in the first cavity within the first wall can improve the space utilization rate inside the battery cell, making the internal structure of the battery cell more compact, which is beneficial to improving the energy density and performance of the battery. On the other hand, the position and shape of the heat exchange flow path can be flexibly adjusted according to the shape and structure of the battery cell to meet the requirements of different batteries.

[0017] In some embodiments, the first wall further includes a plurality of partition portions, which are arranged at intervals in the third direction. The partition portions divide the first cavity into a plurality of sub-cavities arranged in the third direction. Two adjacent sub-cavities communicate with each other. The inlet and the outlet are respectively communicated with two sub-cavities located at both ends among the plurality of sub-cavities. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0018] In the above solution, the partition portions divide the first cavity into a plurality of sub-cavities arranged in the third direction. Two adjacent sub-cavities communicate with each other. The inlet and the outlet are respectively communicated with two sub-cavities located at both ends among the plurality of sub-cavities. Such a design, on the one hand, can make the heat exchange medium flow more uniformly, thereby improving the heat exchange uniformity of the battery cell. At the same time, the risk of the heat exchange medium staying in the heat exchange flow channel during flow can be reduced, further improving the reliability of the battery cell. On the other hand, it can also improve the strength of the first wall and the reliability of the battery cell.

[0019] In some embodiments, the plurality of partition portions include first partition portions and second partition portions that are alternately arranged in the third direction. One end of the first partition portion is connected to the second wall, and a second gap is formed between the other end of the first partition portion and the third wall. One end of the second partition portion is connected to the third wall, and a third gap is formed between the other end of the second partition portion and the second wall. The second gap communicates the two sub-cavities on both sides of the first partition portion, and the third gap communicates the two sub-cavities on both sides of the second partition portion.

[0020] In the above solution, the second gap and the third gap are respectively located at both ends of the second direction, and a plurality of second gaps and a plurality of third gaps are alternately distributed in the third direction, so that the heat exchange medium flows reciprocally and reversely in the second direction, which can further improve the heat exchange uniformity of the battery cell.

[0021] In some embodiments, there are a plurality of first partition portions. A plurality of first grooves are provided on the inner surface of the second wall. The plurality of first grooves are arranged at intervals in the third direction and correspond to the plurality of first partition portions one by one. One end of the first partition portion is inserted into the first groove corresponding to it. There are a plurality of second partition portions. A plurality of second grooves are provided on the inner surface of the third wall. The plurality of second grooves are arranged at intervals in the third direction and correspond to the plurality of second partition portions one by one. One end of the second partition portion is inserted into the second groove corresponding to it.

[0022] In the above solution, the inner surfaces of the first groove and the second groove can serve as the sealing surfaces of the heat exchange flow channel, reducing the risk of the heat exchange medium contacting the electrode assembly and improving the reliability of the battery cell.

[0023] In some embodiments, the housing further includes a third wall, which is arranged opposite to the second wall. The battery cell further includes an electrode terminal, and the electrode terminal is arranged on the third wall.

[0024] In the above solution, the electrode terminal is arranged on the third wall, and the third wall does not include the heat exchange flow channel, with relatively high structural stability, enabling the electrode terminal to withstand greater stress, reducing the risk of connection failure of the electrode terminal, and improving the reliability of the battery cell.

[0025] In some embodiments, the outer casing further includes a third wall, the third wall is arranged opposite to the second wall, and the battery cell further includes a pressure relief mechanism, and the pressure relief mechanism is arranged on the third wall.

[0026] In the above solution, the pressure relief mechanism is arranged on the third wall, and the third wall does not include the heat exchange flow channel, with relatively high structural stability, reducing the risk of abnormal opening of the pressure relief mechanism, and improving the reliability of the battery cell.

[0027] In some embodiments, the outer casing includes a housing, a first end cap and a second end cap. The housing includes a first side wall and a second side wall arranged opposite to each other in a first direction, and a third side wall and a fourth side wall arranged opposite to each other in a third direction. The first side wall, the second side wall, the third side wall and the fourth side wall enclose a receiving cavity having a first opening and a second opening. The first end cap closes the first opening, and the second end cap closes the second opening. The first end cap and the second end cap are arranged opposite to each other in a second direction. The first direction, the second direction and the third direction are perpendicular to each other pairwise. The first side wall is the first wall, the first end cap is the second wall, and the second end cap is the third wall.

[0028] In the above solution, the first side wall, the second side wall, the third side wall and the fourth side wall enclose a receiving cavity having a first opening and a second opening. The first end cap closes the first opening, and the second end cap closes the second opening. The first end cap and the second end cap are arranged opposite to each other in a second direction. The first direction, the second direction and the third direction are perpendicular to each other pairwise. With such a design, the housing, the first end cap and the second end cap can be separately processed and then assembled to form the outer casing, and the heat exchange flow channel can be extruded and formed together with the housing, simplifying the design, manufacturing and assembly difficulty of the battery cell.

[0029] In some embodiments, the length of the battery cell is L, the width of the battery cell is W, and the thickness of the battery cell is H, satisfying: 4 ≤ L / W ≤ 12, 12 ≤ L / H ≤ 60.

[0030] In the above solution, 4 ≤ L / W ≤ 12, 12 ≤ L / H ≤ 60. The battery cell has relatively large dimensions in its length direction and has higher heat exchange requirements. The heat exchange flow channel formed in the wall of the outer casing can significantly improve the heat exchange effect of the battery cell, and thus significantly improve the reliability of the battery.

[0031] In the second aspect, the present application provides a thermal management component, which is used to adjust the temperature of a battery cell. The battery cell has a heat exchange channel for accommodating a heat exchange medium. The thermal management component includes a main body, which is provided with a liquid inlet channel and a liquid outlet channel that are independent of each other. The liquid inlet channel is used to communicate with the inlet of the heat exchange channel, and the liquid outlet channel is used to communicate with the outlet of the heat exchange channel.

[0032] In the above scheme, the main body is provided with independent liquid inlet and outlet channels. Such a design reduces the risk of a large amount of heat exchange between the liquid inlet and outlet channels, resulting in reduced heat exchange effect of the thermal management component. At the same time, for a single battery cell, it is conducive to achieving a one-way circulation flow of the heat exchange medium in the thermal management component, thereby improving the heat exchange effect of the thermal management component. The liquid inlet channel is used to communicate with the inlet of the heat exchange channel, and the liquid outlet channel is used to communicate with the outlet of the heat exchange channel. Such a design allows the heat exchange medium to flow between the main body-battery cell-main body after the thermal management component is matched with the battery cell, thereby improving the heat exchange effect of the thermal management component on the battery cell, thereby improving the reliability of the battery.

[0033] In some embodiments, the liquid inlet channel includes a liquid inlet and a plurality of first communication ports, the first communication ports being used to communicate with the inlet of the heat exchange channel. The liquid outlet channel includes a liquid outlet and a plurality of second communication ports, the second communication ports being used to communicate with the outlet of the heat exchange channel. The first communication ports and the second communication ports correspond one to one, each first communication port and the corresponding second communication port are arranged at intervals along the third direction, the plurality of first communication ports and the plurality of second communication ports are arranged in two rows, the arrangement direction of each row of communication ports is the first direction, and the first direction is perpendicular to the third direction.

[0034] In the above scheme, the liquid inlet channel includes a liquid inlet and a plurality of first connecting ports, and the first connecting port is used to communicate with the inlet of the heat exchange channel. The liquid outlet channel includes a liquid outlet and a plurality of second connecting ports, and the second connecting port is used to communicate with the outlet of the heat exchange channel. The first connecting port and the second connecting port correspond to each other one by one, and each first connecting port and the corresponding second connecting port are arranged at intervals along the third direction. The plurality of first connecting ports and the plurality of second connecting ports are arranged in two rows, and the arrangement direction of each row of connecting ports is the first direction. Such a design, on the one hand, can make the thermal management component adapt to the heat exchange requirements of multiple battery cells, and each battery cell has a corresponding heat exchange channel, thereby improving the heat exchange uniformity of the thermal management component. On the other hand, when the thermal management component needs maintenance, the corresponding heat exchange channel between the first connecting port and the second connecting port can be maintained in a targeted manner, thereby improving maintenance efficiency and reducing maintenance costs.

[0035] In some embodiments, the thermal management component further includes a plurality of plug-in parts, which are protruding from the outer surface of the body, and the plug-in parts correspond one-to-one to the connecting ports, and are used to be plugged with the inlet or outlet of the heat exchange channel.

[0036] In the above solution, the battery cell can be inserted into the insertion part to achieve the assembly of the battery cell and the thermal management component, and to connect the liquid inlet channel, the liquid outlet channel and the heat exchange channel to form a loop for the heat exchange medium to flow. This reduces the assembly difficulty of the thermal management component and improves the assembly efficiency of the thermal management component.

[0037] In some embodiments, in each row of communication ports, the first communication port and the second communication port are alternately distributed along a first direction.

[0038] In the above solution, in each row of communication ports, the first communication port and the second communication port are alternately distributed along a first direction. Such a design balances the temperature difference between the first communication port and the second communication port while enabling the thermal management component to have a high heat exchange effect, reducing the risk that the heat exchange effect of the thermal management component is reduced due to heat accumulation in the thermal management component. At the same time, the risk of thermal stress concentration in the thermal management component is reduced, and the reliability of the thermal management component is improved.

[0039] In some embodiments, the liquid inlet channel includes two first shunt channels arranged at intervals along a third direction, and each first shunt channel is connected with a plurality of first branch channels. One end of the first branch channel is communicated with the first shunt channel, and the first communication port is arranged at the other end of the first branch channel.

[0040] In the above solution, the liquid inlet channel includes two first shunt channels arranged at intervals along a third direction. Such a design enriches the cooperation mode between the thermal management component and the battery cell and improves the adaptability of the thermal management component. Each first shunt channel is connected with a plurality of first branch channels. One end of the first branch channel is communicated with the first shunt channel, and the first communication port is arranged at the other end of the first branch channel. Such a design increases the heat exchange area of the thermal management component and improves the heat exchange effect of the thermal management component. At the same time, the turbulence effect of the liquid inlet channel is enhanced, and the heat exchange effect is enhanced. To a certain extent, the risk of heat exchange medium retention in the liquid inlet channel can also be reduced, making the temperature distribution in the liquid inlet channel more uniform while improving the heat exchange effect of the thermal management component, and improving the reliability.

[0041] In some embodiments, the liquid inlet channel further includes a first main channel, the first main channel connects the two first shunt channels, and the first main channel is communicated with the liquid inlet.

[0042] In the above solution, the liquid inlet channel further includes a first main channel, the first main channel connects the two first shunt channels, and the first main channel is communicated with the liquid inlet. This further refines the distribution of the liquid inlet channel, increases the heat exchange area of the thermal management component, and improves the heat exchange effect of the thermal management component.

[0043] In some embodiments, the liquid outlet flow channel includes two second diversion channels arranged at intervals along a third direction. Each second diversion channel is connected to a plurality of second branch channels. One end of each second branch channel communicates with the second diversion channel, and a second communication port is arranged at the other end of the second branch channel.

[0044] In the above solution, the liquid outlet flow channel includes two second diversion channels arranged at intervals along a third direction. Such a design enriches the cooperation mode between the heat management component and the battery cell and improves the adaptability of the heat management component. Each second diversion channel is connected to a plurality of second branch channels. One end of each second branch channel communicates with the second diversion channel, and a second communication port is arranged at the other end of the second branch channel. Such a design increases the heat exchange area of the heat management component and improves the heat exchange effect of the heat management component. At the same time, the flow disturbance effect of the liquid outlet flow channel is enhanced, and the heat exchange effect is enhanced. To a certain extent, the risk of heat exchange medium retention in the liquid outlet flow channel can also be reduced, making the temperature distribution of the liquid outlet flow channel more uniform while improving the heat exchange effect of the heat management component, and the reliability is improved.

[0045] In some embodiments, the liquid outlet flow channel further includes a second main channel. The second main channel connects the two second diversion channels, and the second main channel communicates with the liquid outlet.

[0046] In the above solution, the liquid outlet flow channel further includes a second main channel. The second main channel connects the two second diversion channels, and the second main channel communicates with the liquid outlet. This further refines the distribution of the liquid outlet flow channel, increases the heat exchange area of the heat management component, and improves the heat exchange effect of the heat management component.

[0047] In some embodiments, in the third direction, the two first diversion channels are located between the two second diversion channels. Each first branch channel extends from the first diversion channel where it is located in a direction away from the other first diversion channel. Each second branch channel extends from the second diversion channel where it is located in a direction away from the other second diversion channel. The first branch channels and the second branch channels are arranged alternately along a first direction.

[0048] In the above solution, in the third direction, the two first diversion channels are located between the two second diversion channels. Each first branch channel extends from the first diversion channel where it is located in a direction away from the other first diversion channel. Each second branch channel extends from the second diversion channel where it is located in a direction away from the other second diversion channel. The first branch channels and the second branch channels are arranged alternately in the first direction. Such a design makes each first diversion channel and each second diversion channel located between a first branch channel and a second branch channel. At the same time, the first branch channels and the second branch channels are arranged alternately in the first direction, which can further improve the temperature uniformity of the thermal management component, and thus improve the reliability of the thermal management component. On the other hand, in the third direction, the second diversion channel is farther from the center of the thermal management component than the first diversion channel, which can further improve the heat exchange effect of the thermal management component on the battery cell. On the other hand, it can make the heat exchange medium flow into the battery cell faster, improving the heat exchange efficiency of the thermal management component.

[0049] In some embodiments, in the third direction, the two second diversion channels are located between the two first diversion channels. Each second branch channel extends from the second diversion channel where it is located in a direction away from the other second diversion channel. Each first branch channel extends from the first diversion channel where it is located in a direction away from the other first diversion channel. The second branch channels and the first branch channels are arranged alternately in the first direction.

[0050] In the above solution, in the third direction, the two second diversion channels are located between the two first diversion channels. Each second branch channel extends from the second diversion channel where it is located in a direction away from the other second diversion channel. Each first branch channel extends from the first diversion channel where it is located in a direction away from the other first diversion channel. The second branch channels and the first branch channels are arranged alternately in the first direction. Such a design can improve the temperature uniformity of the thermal management component to a certain extent, and thus improve the reliability of the thermal management component.

[0051] In some embodiments, the thermal management component includes a first plate body and a second plate body arranged in a stacked manner. The side of the second plate body facing the first plate body has a third groove and a fourth groove. The first plate body covers the third groove to form an inlet flow channel, and the first plate body covers the fourth groove to form an outlet flow channel. The first communication port and the second communication port are arranged on the first plate body.

[0052] In the above solution, the side of the second plate body facing the first plate body has a third groove and a fourth groove. The first plate body covers the third groove to form an inlet flow channel, and the first plate body covers the fourth groove to form an outlet flow channel. The first communication port and the second communication port are arranged on the first plate body. The third groove and the fourth groove can be formed in one step by processing methods such as stamping. Only by covering the second plate body with the first plate body can the inlet flow channel and the outlet flow channel be formed, with high manufacturing efficiency and low cost.

[0053] In a third aspect, the present application provides a battery, which includes the battery cells in the above embodiments and the thermal management component in the above embodiments, and a plurality of battery cells are arranged in a first direction. The thermal management component is used to adjust the temperature of the battery cells. The liquid inlet channel is communicated with the inlet of the heat exchange channel, and the liquid outlet channel is communicated with the outlet of the heat exchange channel.

[0054] In the above solution, on the premise of using relatively few accessory parts, the heat exchange channel and the thermal management component can simultaneously exchange heat with the battery cells, improving the heat exchange effect of the battery cells, and thus improving the reliability of the battery. At the same time, a large amount of assembly space is saved, and the energy density of the battery is increased. On the other hand, the manufacturing and assembly costs of the battery are reduced.

[0055] In some embodiments, the flow directions of the heat exchange media in two adjacent battery cells are opposite.

[0056] In the above solution, the flow directions of the heat exchange media in two adjacent battery cells are opposite. Such a design makes the heat exchange uniformity between every two adjacent battery cells higher, reduces the risk of thermal stress concentration, improves the reliability of the battery cells, and at the same time, improves the heat exchange effect of the battery, and thus further improves the reliability of the battery.

[0057] In some embodiments, the outer shell includes a first wall and a second wall arranged adjacent to each other. The second wall is thermally connected to the thermal management component. The inlet and the outlet are arranged on the second wall, and at least a part of the heat exchange channel is formed on the first wall.

[0058] In the above solution, the outer shell includes a first wall and a second wall arranged adjacent to each other. The second wall is thermally connected to the thermal management component. The inlet and the outlet are arranged on the second wall, and at least a part of the heat exchange channel is formed on the first wall. Such a design enables heat exchange to occur on three sides of at least some of the battery cells among a plurality of battery cells, further improving the heat exchange effect of the battery cells, and thus further improving the reliability of the battery cells.

[0059] In a fourth aspect, the present application provides an electrical device, which includes the battery cells in the above embodiments, and the battery cells are used to provide electrical energy; or, it includes the battery in the above embodiments, and the battery is used to provide electrical energy.

[0060] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make other purposes, features and advantages of the present application more obvious and understandable, the following specifically lists the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Upon reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0062] Figure 1 Schematic structural diagram of a vehicle according to some embodiments of the present application;

[0063] Figure 2 Explosion diagram of a battery according to some embodiments of the present application;

[0064] Figure 3 Explosion diagram of a battery cell according to some embodiments of the present application;

[0065] Figure 4 Explosion diagram of a battery cell according to some other embodiments of the present application;

[0066] Figure 5 Isometric view of a second wall according to some embodiments of the present application;

[0067] Figure 6 Schematic structural diagram of a battery cell according to some embodiments of the present application;

[0068] Figure 7 Schematic structural diagram of a battery cell according to some other embodiments of the present application;

[0069] Figure 8 Schematic diagram of a partial structure of a battery cell according to some embodiments of the present application;

[0070] Figure 9 Cross-sectional view of a battery cell according to some embodiments of the present application;

[0071] Figure 10 Isometric view of a second wall according to some other embodiments of the present application;

[0072] Figure 11 Isometric view of a third wall according to some embodiments of the present application;

[0073] Figure 12 Isometric view of a battery cell according to some embodiments of the present application;

[0074] Figure 13 Explosion diagram of a battery cell according to some other embodiments of the present application;

[0075] Figure 14 Explosion diagram of a thermal management component according to some embodiments of the present application;

[0076] Figure 15 Cross-sectional view of a thermal management component according to some embodiments of the present application;

[0077] Figure 16 Schematic diagram of a partial structure of a thermal management component according to some embodiments of the present application;

[0078] Figure 17 For the present application Figure 16 Partial enlarged view at location A in;

[0079] Figure 18 For the present application Figure 16 Partial enlarged view at location B in;

[0080] Figure 19 Schematic diagram of a partial structure of a thermal management component according to some other embodiments of the present application;

[0081] Figure 20 Axonometric view of a thermal management component according to some embodiments of the present application;

[0082] Figure 21 Top view of a partial structure of a thermal management component according to some embodiments of the present application;

[0083] Figure 22 Top view of a partial structure of a thermal management component according to some other embodiments of the present application;

[0084] Figure 23 Top view of a partial structure of a thermal management component according to some other embodiments of the present application;

[0085] Figure 24 Top view of a partial structure of a thermal management component according to some further embodiments of the present application;

[0086] Figure 25 Axonometric view of a partial structure of a battery according to some embodiments of the present application;

[0087] Figure 26 Axonometric view of a partial structure of a battery according to some other embodiments of the present application.

[0088] The reference numerals in the specific embodiments are as follows:

[0089] 1000 - Vehicle; 200 - Controller; 300 - Motor; 100 - Battery; 11 - Box; 111 - First part; 112 - Second part;

[0090] 12 - Battery cell; 120 - Outer shell; 1201 - Housing; 12011 - First side wall; 12012 - Second side wall; 12013 - Third side wall; 12014 - Fourth side wall; 1202 - First end cap; 1203 - Second end cap; 1204 - Accommodation cavity; 1211 - First wall; 12111 - First sub - wall; 12112 - Second sub - wall; 1212 - Second wall; 1213 - Third wall; 12113 - Partition; 12113a - First partition; 12113b - Second partition; 122 - Electrode assembly; 123 - Heat exchange flow channel; 1231 - Inlet; 1232 - Outlet; 124 - First gap; 125 - First cavity; 1251 - Sub - cavity; 126 - Second gap; 127 - Third gap; 128 - First groove; 129 - Second groove; 1210 - Electrode terminal; 1230 - Pressure relief mechanism; 13 - Thermal management component; 130 - Body; 131 - Liquid inlet flow channel; 1311 - Liquid inlet; 1312 - First communication port; 1313 - First shunt channel; 1314 - First branch channel; 1315 - First main channel; 1321 - Liquid outlet; 1322 - Second communication port; 132 - Liquid outlet flow channel; 1323 - Second shunt channel; 1324 - Second branch channel; 1325 - Second main channel; 133 - Insertion part; 134 - First plate body; 135 - Second plate body; 1351 - Third groove; 1352 - Fourth groove; 14 - Enclosure; X - First direction; Y - Second direction; Z - Third direction. Detailed implementation manners

[0091] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above - mentioned drawings are intended to cover non - exclusive inclusion.

[0093] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary - secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two unless otherwise specifically defined.

[0094] References to "embodiments" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment each time, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0095] In the description of the embodiments of this application, the term "plurality" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0096] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, and does 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 construed as a limitation on the embodiments of this application.

[0097] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0098] In this application, the battery cell can include, but is not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, etc. The shape of the battery cell can include, but is not limited to, cylinders, flat bodies, cuboids, or other shapes. The battery cell can be packaged in, but is not limited to, cylindrical battery cells, square battery cells, soft-pack battery cells, and blade-shaped battery cells.

[0099] In high-power applications such as electric vehicles, the application of batteries includes three levels: battery cells, battery modules, and batteries. A battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame to protect the battery cells from external impacts, heat, vibration, etc. A battery refers to the final state of the battery system installed in an electric vehicle. The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. A battery generally includes a box for encapsulating one or more battery cells. The box can reduce the risk of liquid or other foreign objects affecting the charging or discharging of the battery cells.

[0100] The following will mainly focus on blade-shaped battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells, pouch battery cells, or square battery cells in some aspects.

[0101] In a typical battery cell structure, a battery cell includes a housing, an electrode assembly, and an electrolyte. The housing generally includes an end cap and a housing with an opening. The end cap closes the opening of the housing to define an accommodation space for accommodating the electrode assembly. The electrode assembly is accommodated in the accommodation space and includes a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector without the coated positive electrode active material layer protrudes from the positive electrode current collector with the coated positive electrode active material layer. The positive electrode current collector without the coated positive electrode active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the coated negative electrode active material layer protrudes from the negative electrode current collector with the coated negative electrode active material layer. The negative electrode current collector without the coated negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order not to fuse when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. In addition, the forming method of the electrode assembly can include but is not limited to winding type, stacking type, etc.

[0102] The tabs generally lead out the electrical energy of the electrode assembly by being electrically connected to a conductive member. In some cases, the conductive member is a transfer piece connecting the tab and the electrode terminal. In some other cases, the conductive member is the electrode terminal.

[0103] The electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a blade-shaped battery cell, the electrode terminals are generally arranged on the end cap part. In some other cases, the electrode terminals can also be arranged on the housing part. Multiple battery cells are connected in series and / or in parallel via the electrode terminals for various applications.

[0104] For a battery cell, there are generally at least three protection measures. Specifically, the protection measures at least include a switching element, selecting an appropriate separator film material, and a pressure relief component. The pressure relief mechanism refers to an element or component that actuates to release the internal pressure or temperature when the internal pressure or temperature or other conditions of the battery cell reach a predetermined threshold. This threshold design varies according to different design requirements. The threshold may depend on one or several of the materials of the positive electrode plate, negative electrode plate, electrolyte, and separator film in the battery cell. The pressure relief mechanism can take forms such as an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature or other conditions of the battery cell reach a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief component is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released. Generally, the melting point and / or thickness of the weak structure are lower than other areas of the pressure relief component. For example, the weak structure can be a scored groove provided on the surface of the pressure relief mechanism. For a blade-shaped battery cell, the pressure relief mechanism is generally arranged on the end cap part. In some other cases, the pressure relief mechanism can also be arranged on the housing part.

[0105] The development of battery technology needs to consider multiple design factors simultaneously, such as performance parameters like energy density, cycle life, discharge capacity, charge-discharge rate, etc. Additionally, the reliability of the battery also needs to be considered.

[0106] To improve the working reliability and stability of the battery, a thermal management component is usually arranged in the box. In some cases, the thermal management component is located at the bottom of the box and fixedly installed on the side wall of the box. In other cases, the thermal management component is located between adjacent battery cells and is in contact with the large surface of the battery cells. The battery cells are generally connected to the thermal management component through a thermal conductive adhesive to facilitate heat exchange between the battery cells and the thermal management component. When the temperature of the thermal management component changes, the temperature of the battery cells in contact with it also changes.

[0107] Battery cells exhibit different electrical cycle performances at different ambient temperatures. When the ambient temperature is too high or too low, the cycle performance of the battery cells will decline. In a conventional battery, only one-sided heat exchange can be performed on the battery cells through the thermal management component, and the heat exchange effect is poor. Especially during high-voltage fast charging, the heat exchange performance of the battery is poor and the reliability is low.

[0108] In view of this, the present application provides a battery cell, which includes a housing and an electrode assembly, and the electrode assembly is housed in the housing. Among them, a heat exchange flow channel for accommodating a heat exchange medium is formed in the wall of the housing. When other factors affecting the heat exchange effect of the battery cell are certain, such a design makes the distance between the heat exchange medium and the accommodation cavity for accommodating the electrode assembly in the housing closer, improves the heat exchange effect of the heat exchange medium on the battery cell, improves the reliability of the battery cell, and further improves the reliability of the battery.

[0109] The technical solutions described in the embodiments of the present application are applicable to battery cells, batteries, and electrical equipment using batteries.

[0110] The electrical equipment includes but is not limited to: battery cars, electric vehicles, ships, spacecraft, etc. For example, spacecraft includes airplanes, rockets, space shuttles, spaceships, etc.

[0111] For the convenience of description in the following embodiments, a vehicle as an electrical equipment in an embodiment of the present application is taken as an example for description.

[0112] For example, Figure 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc. A motor 300, a controller 200, and a battery 100 can be arranged inside the vehicle 1000. The controller 200 is used to control the power supply of the battery 100 to the motor 300. For example, the battery 100 can be arranged at the bottom, the front end, or the rear end of the vehicle 1000. The battery 100 can be used for the power supply of the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000 and used for the circuit system of the vehicle 1000, such as for the working power requirements during the start-up, navigation, and operation of the vehicle 1000. In another embodiment of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0113] In order to meet different power usage requirements, the battery 100 can include a plurality of battery cells 12. Among them, the plurality of battery cells 12 can be connected in series, in parallel, or in a series-parallel hybrid connection. The series-parallel hybrid connection means a combination of series and parallel connections. The battery 100 can also be referred to as a battery pack. Optionally, the plurality of battery cells 12 can first be connected in series, in parallel, or in a series-parallel hybrid connection to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a series-parallel hybrid connection to form the battery 100. That is to say, the plurality of battery cells 12 can directly form the battery 100, or can first form a battery module, and then the battery module forms the battery 100.

[0114] For example, please refer to Figure 2 ,Figure 2 An exploded view of the battery 100 according to some embodiments of the present application. The battery 100 may include a plurality of battery cells 12. The battery 100 may further include a housing 11, the interior of the housing 11 is a hollow structure, and a plurality of battery cells 12 are accommodated in the housing 11. As Figure 2 shown, here they are respectively referred to as a first part 111 and a second part 112, and the first part 111 and the second part 112 are snapped together. The shapes of the first part 111 and the second part 112 may be determined according to the shape of the combination of the plurality of battery cells 12. The first part 111 and the second part 112 may each have an opening. For example, both the first part 111 and the second part 112 may be hollow cuboids and each has only one face as an opening face. The opening of the first part 111 and the opening of the second part 112 are oppositely arranged, and the first part 111 and the second part 112 are snapped together to form a housing 11 with a closed chamber. A plurality of battery cells 12 are connected in parallel, in series, or in a hybrid connection and then placed in the housing 11 formed after the first part 111 and the second part 112 are snapped together. In some embodiments, the first part 111 may have an opening, and the second part 112. The second part 112 may include a surrounding frame 14 and a bottom plate. The surrounding frame 14 may have two oppositely arranged openings. One opening of the surrounding frame 14 is snapped with the opening of the first part 111, and the other opening of the surrounding frame 14 is closed by the bottom plate, thereby forming a housing 11 with a closed chamber. The thermal management component 13 may be disposed in the housing 11 and mounted on the wall of the second part 112. The thermal management component 13 may also be mounted on the bottom plate. In some cases, the thermal management component 13 may also serve as the bottom plate.

[0115] Optionally, the battery 100 may further include other structures, which will not be elaborated here one by one. For example, the battery 100 may further include a busbar component for realizing electrical connection between a plurality of battery cells 12, such as in parallel, in series, or in a hybrid connection. Specifically, the busbar component may realize the electrical connection between the battery cells 12 by connecting the electrode terminals 1210 of the battery cells 12. Further, the busbar component may be fixed to the electrode terminals 1210 of the battery cells 12 by welding. The electrical energy of a plurality of battery cells 12 may further be led out through a conductive mechanism passing through the housing 11.

[0116] According to different power requirements, the number of battery cells 12 may be set to any value. A plurality of battery cells 12 may be connected in series, in parallel, or in a hybrid connection to achieve a larger capacity or power. Since the number of battery cells 12 included in each battery 100 may be relatively large, for the convenience of installation, the battery cells 12 may be grouped, and each group of battery cells 12 forms a battery module. The number of battery cells 12 included in the battery module is not limited and may be set according to requirements. The battery 100 may include a plurality of battery modules, and these battery modules may be connected in series, in parallel, or in a hybrid connection.

[0117] Please refer to Figure 3 as shown in Figure 3 which is an exploded view of the battery cell 12 of some embodiments of the present application. The battery cell 12 includes one or more electrode assemblies 122 and a housing 120. The housing 120 may include a housing body 1201. Multiple wall portions of the housing body 1201, i.e., multiple wall portions of the housing 120, enclose a cavity, and this cavity can be used to accommodate the electrode assembly 122. The housing body 1201 is determined according to the shape after combining one or more electrode assemblies 122. For example, the housing body 1201 can be a hollow cuboid or cube or regular polyhedron, and one of the faces of the housing body 1201 has an opening so that one or more electrode assemblies 122 can be placed inside the housing body 1201. The housing body 1201 is filled with an electrolyte, such as an electrolyte solution. In some embodiments, the housing body 1201 may also have two relatively arranged openings, and the housing 120 further includes two end caps corresponding to the above openings one by one, and the end caps close the corresponding openings.

[0118] The battery cell 12 may further include two electrode terminals 1210, and the two electrode terminals 1210 can be arranged on the end caps. The end caps are generally in a flat plate shape, and the two electrode terminals 1210 are fixed on the flat plate surface of the end cap. The two electrode terminals 1210 are a positive electrode terminal and a negative electrode terminal respectively. Each electrode terminal 1210 is correspondingly provided with a connecting piece, which is located between the end cap and the electrode assembly 122 and is used to electrically connect the electrode assembly 122 and the electrode terminal 1210. In the battery cell 12, according to actual use requirements, the electrode assembly 122 can be set to be single or multiple, and multiple independent electrode assemblies 122 are arranged in the battery cell 12. The multiple electrode assemblies 122 can also be connected in series and the electrical energy of the multiple electrode assemblies 122 can be led out through a positive electrode terminal and a negative electrode terminal.

[0119] According to some embodiments of the present application, the present application provides a battery 100, including the battery cell 12 described in any of the above solutions.

[0120] According to some embodiments of the present application, the present application provides an electrical device, including the battery 100 described in any of the above solutions, and the battery 100 is used to provide electrical energy.

[0121] According to some embodiments of the present application, referring to Figure 3 , the present application provides a battery cell 12, which includes a housing 120 and an electrode assembly 122, and the electrode assembly 122 is received in the housing 120. Among them, a heat exchange flow channel 123 for accommodating a heat exchange medium is formed on the wall of the housing 120.

[0122] The housing 120 generally has an accommodation cavity 1204, and the electrode assembly 122 is received in the accommodation cavity 1204.

[0123] The wall of the housing 120 is formed with a heat exchange flow channel 123 for accommodating a heat exchange medium. That is to say, at least a part of the heat exchange flow channel 123 is located inside the wall of the housing 120. The heat exchange flow channel 123 is independent of the accommodation cavity 1204, that is, the heat exchange flow channel 123 is not communicated with the accommodation cavity 1204. In other words, the heat exchange medium can only flow in the heat exchange flow channel 123 and will not flow into the accommodation cavity 1204.

[0124] The heat exchange medium is generally a fluid for regulating the temperature of the battery cells 12. The fluid here can be a liquid or a gas. Regulating the temperature means heating or dissipating heat from a plurality of battery cells 12. In the case of dissipating heat or cooling the battery cells 12, the heat exchange medium can also be called a cooling medium or a cooling fluid. More specifically, it can be called a coolant or a cooling gas. In addition, the heat exchange medium can also raise the temperature of the battery cells 12. Optionally, the fluid can be circulated to achieve a better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0125] The following will be described by taking the heat exchange medium dissipating heat from the battery cells 12 as an example.

[0126] There are many factors affecting the heat exchange effect of the battery cells 12. For example, the structural form of the heat exchange flow channel 123, the flow rate of the heat exchange medium, the type of the heat exchange medium, the material of the wall for defining the heat exchange flow channel 123, and the thickness of the wall for defining the heat exchange flow channel 123, etc.

[0127] In some cases, the battery cells 12 are installed on the outer surface of one of the wall parts of the thermal management component 13 through a thermal conductive adhesive, and the heat exchange medium is located inside the thermal management component 13. When the heat exchange medium exchanges heat with the battery cells 12, the heat needs to pass through at least one wall part of the thermal management component 13 and one wall part of the battery cells 12 before it can be exchanged between the heat exchange medium and the accommodation cavity 1204. Compared with the above embodiment, the wall of the housing 120 is formed with a heat exchange flow channel 123 for accommodating the heat exchange medium. That is to say, the heat only needs to pass through one wall part of the battery cells 12 to be exchanged between the heat exchange medium and the accommodation cavity 1204, improving the heat exchange effect of the battery cells 12. In other words, when other factors affecting the heat exchange effect of the battery cells 12 are certain, the distance between the heat exchange medium and the accommodation cavity 1204 for accommodating the electrode assembly 122 in the housing 120 is closer, thereby improving the heat exchange effect of the heat exchange medium on the battery cells 12.

[0128] In the technical solution of the embodiment of the present application, a heat exchange flow channel 123 for accommodating a heat exchange medium is formed in the wall of the outer shell 120. When other factors affecting the heat exchange effect of the battery cell 12 are certain, such a design makes the distance between the heat exchange medium and the accommodating cavity 1204 in the outer shell 120 for accommodating the electrode assembly 122 closer, improves the heat exchange effect of the heat exchange medium on the battery cell 12, improves the reliability of the battery cell 12, and further improves the reliability of the battery 100.

[0129] According to some embodiments of the present application, please refer to Figure 3 , Figure 4 and Figure 5 , the heat exchange flow channel 123 includes an inlet 1231 and an outlet 1232, and the inlet 1231 and the outlet 1232 are arranged on the same wall of the outer shell 120.

[0130] There are at least the following two situations where the inlet 1231 and the outlet 1232 are arranged on the same wall of the outer shell 120. First, please refer to Figure 3 , a part of the heat exchange flow channel 123 is arranged on one wall of the outer shell 120, and both the inlet 1231 and the outlet 1232 are arranged on another wall of the outer shell 120. After the above two walls are assembled, a complete heat exchange flow channel 123 is formed. Second, please refer to Figure 4 , the complete heat exchange flow channel 123 can be arranged on one wall of the outer shell 120, and the inlet 1231 and the outlet 1232 are naturally located on the above wall of the outer shell 120. Taking the complete heat exchange flow channel 123 arranged on the first wall 1211 as an example, the outer shell 120 can be formed by means such as 3D printing, and the heat exchange flow channel 123 is formed simultaneously when the outer shell 120 is formed. The first wall 1211 can also be processed separately, and the heat exchange flow channel 123 is formed simultaneously when the first wall 1211 is processed, and then the first wall 1211 is assembled with the remaining wall parts of the outer shell 120 to form a complete outer shell 120. Among them, after the second wall 1212 closes the opening of the accommodating cavity 1204, in the second direction Y, the outer surface of the second wall 1212 is coplanar with the outer surface of the first wall 1211.

[0131] The energy density of the battery 100 refers to the electric energy released per unit volume or mass of the battery 100 on average. The greater the energy density of the battery 100, the more energy is stored per unit volume or weight. For example, on the premise that the total occupied space of the battery 100 remains unchanged, the larger the internal space of the battery 100 for accommodating the battery cell 12, the greater the volume energy density of the battery 100. For example, on the premise that the internal space of the battery 100 for accommodating the battery cell 12 remains unchanged, the smaller the total occupied space of the battery 100, the greater the volume energy density of the battery 100.

[0132] Generally, accessories for connecting to the heat exchange flow channel 123, such as pipe joints, etc., will be arranged outside the box body 11. The heat exchange flow channel 123 will be connected to the pipe joint through a connecting pipe. The inlet 1231 and the outlet 1232 are arranged on the same wall of the outer shell 120, which means that the connecting pipe can extend to the outside of the box body 11 of the battery 100 basically along a single direction. For example, the connecting pipes can all extend towards the bottom wall to be connected to the pipe joint. If the inlet 1231 and the outlet 1232 are arranged on different wall parts of the outer shell 120, the connecting piece needs to be led out from at least both sides of the battery cell 12. If the connecting pipe on one side extends towards the bottom wall, the connecting pipe on the other side will inevitably turn inside the box body 11 if it wants to be connected to the pipe joint arranged on the bottom wall, thereby occupying additional internal space of the box body 11 and reducing the volume energy density of the battery 100.

[0133] Meanwhile, the inlet 1231 and the outlet 1232 can directly serve as pipe joints or so-called current collector posts for connecting the heat exchange flow channel 123 to an external heat exchange device. For example, the connection between the inlet 1231 and the outlet 1232 is achieved through a plug-in fit method. The space occupied by external accessories such as pipe joints is saved, the capacity of the box body 11 of the battery 100 is increased, and the energy density of the battery 100 is improved.

[0134] In the above solution, the inlet 1231 and the outlet 1232 of the heat exchange flow channel 123 are arranged on the same wall of the outer shell 120. Such a design, on the one hand, can simplify the manufacturing and installation processes of the battery cell 12 and reduce the manufacturing and assembly costs. On the other hand, it can reduce the assembly space required when the battery cell 12 cooperates with other components in the battery 100, which is beneficial to improving the energy density of the battery 100.

[0135] According to some embodiments of the present application, please refer to Figure 3 and Figure 5 , the outer shell 120 includes a first wall 1211 and a second wall 1212 arranged adjacent to each other. At least a part of the heat exchange flow channel 123 is formed in the first wall 1211, and the inlet 1231 and the outlet 1232 are arranged on the second wall 1212.

[0136] At least a part of the heat exchange flow channel 123 is formed in the first wall 1211, and the inlet 1231 and the outlet 1232 are arranged on the second wall 1212. This means that for the battery 100 in different assembly environments, only different second walls 1212 need to be separately customized to meet the assembly requirements. For example, only multiple second walls 1212 with different distances between the inlet 1231 and the outlet 1232 need to be pre-processed. There is no need to change the design of the heat exchange flow channel 123 in the first wall 1211.

[0137] Meanwhile, the second wall 1212 can be provided with only the inlet 1231 and the outlet 1232. Most of the heat exchange flow path 123 is located in the first wall 1211, without sacrificing the area of the first wall 1211 to set the inlet 1231 and the outlet 1232, which is equivalent to increasing the heat exchange area of the heat exchange flow path 123.

[0138] By arranging the inlet 1231 and the outlet 1232 on the second wall 1212 adjacent to the first wall 1211, the risk that the above-mentioned assembly stress concentrates on the first wall 1211 can be reduced, thereby improving the structural stability of the battery cell 12.

[0139] In the above solution, the housing 120 includes the first wall 1211 and the second wall 1212 arranged adjacent to each other. At least a part of the heat exchange flow path 123 is formed in the first wall 1211, and the inlet 1231 and the outlet 1232 are arranged on the second wall 1212. On the one hand, the positions of the inlet 1231 and the outlet 1232 can be flexibly adjusted according to the assembly environment in the battery 100, so that the battery cell 12 can be adapted to the assembly of more batteries 100. On the other hand, the structure of the battery 100 can be simplified, which is beneficial to improving the structural stability of the battery cell 12. On the other hand, the heat exchange area of the heat exchange flow path 123 in the first wall 1211 can be made larger, improving the heat exchange effect of the battery cell 12, and further improving the reliability of the battery 100.

[0140] According to some embodiments of the present application, please refer to Figure 3 , the first wall 1211 is the wall with the largest area in the housing 120.

[0141] As the base body for arranging the heat exchange flow path 123, the larger the area of the first wall 1211, the larger the heat exchange area of the heat exchange flow path 123 can be set.

[0142] In the above solution, arranging the heat exchange flow path 123 in the first wall 1211, which is the wall with the largest area in the housing 120, is beneficial to increasing the heat exchange area of the heat exchange flow path 123, and further improving the heat exchange effect of the battery cell 12.

[0143] According to some embodiments of the present application, please refer to Figure 3 , Figure 6 and Figure 8 , the first wall 1211 includes a first sub-wall 12111 and a second sub-wall 12112. The first sub-wall 12111 and the second sub-wall 12112 are arranged at intervals along the first direction X to form a first gap 124. The inlet 1231 and the outlet 1232 are communicated with the first gap 124, and the first direction X is parallel to the thickness direction of the first wall 1211.

[0144] The first sub-wall 12111 and the second sub-wall 12112 can serve as the sealing wall surfaces of the heat exchange flow path 123, without the need to provide an additional sealing structure in the first direction X.Figure 3 Taking the battery cell 12 in as an example, only the second wall 1212 and the third wall 1213 need to close the opening of the heat exchange flow channel 123 in the first direction X to achieve the sealing of the heat exchange flow channel 123. This makes the internal space of the battery cell 12 larger and the volumetric energy density higher.

[0145] At the same time, the first sub-wall 12111 and the second sub-wall 12112 divide the space of the heat exchange flow channel 123, which can be used as the design and assembly reference for the heat exchange flow channel 123. For example, in some embodiments, the heat exchange flow channel 123 is formed by a meandering pipeline, which is arranged in the first gap 124. During assembly, the pipeline can be pre-inserted into the first gap 124, and then the pipeline and the inlet 1231 and the outlet 1232 can be directly connected through pipe joints without the need for measurement and positioning, etc.

[0146] In the above solution, the first wall 1211 includes the first sub-wall 12111 and the second sub-wall 12112. The first sub-wall 12111 and the second sub-wall 12112 are arranged at intervals in the first direction X to form the first gap 124. At least part of the heat exchange flow channel 123 can be arranged in the first gap 124. On the one hand, there is no need to install a seal in the first direction X to improve the sealing performance of the heat exchange flow channel 123, which saves the internal space of the battery cell 12 to a certain extent and is beneficial to improving the energy density of the battery cell 12. On the other hand, the first gap 124 can define the assembly space of the heat exchange flow channel 123, which is beneficial to reducing the design, manufacturing and assembly difficulties of the heat exchange flow channel 123.

[0147] According to some embodiments of the present application, please refer to Figure 3 、 Figure 7 and Figure 8 , the outer shell 120 further includes a third wall 1213. The third wall 1213 is arranged opposite to the second wall 1212 in the second direction Y. The third wall 1213, the second wall 1212, the first sub-wall 12111 and the second sub-wall 12112 enclose the first cavity 125. The inlet 1231 and the outlet 1232 are communicated with the first cavity 125. The second direction Y is perpendicular to the first direction X.

[0148] The heat exchange medium can be accommodated in the first cavity 125 to form the heat exchange flow channel 123, so that there is no need to define the heat exchange flow channel 123 through a copper pipe, etc., making the structure of the battery cell 12 more compact. At the same time, compared with the copper pipe cavity without a pipe wall, the area of the heat exchange flow channel 123 that can be designed is larger. In addition, according to the heat exchange requirements of different batteries 100, only the internal structure of the first wall 1211 needs to be customized separately to complete the transformation of the structural form of the heat exchange flow channel 123, without considering factors such as whether the bending of the copper pipe will interfere with the outer shell 120.

[0149] In the above solution, the third wall 1213, the second wall 1212, the first sub-wall 12111 and the second sub-wall 12112 enclose a first cavity 125, and the inlet 1231 and the outlet 1232 communicate with the first cavity 125. Such a design can, on the one hand, simplify the structure of the battery cell 12, reduce the number of external pipelines and heat exchange devices, and lower the manufacturing cost. On the other hand, by arranging the heat exchange flow channel 123 in the first cavity 125 within the first wall 1211, the space utilization rate inside the battery cell 12 can be improved, making the internal structure of the battery cell 12 more compact, which is beneficial to improving the energy density and performance of the battery 100. On the other hand, according to the shape and structure of the battery cell 12, the position and shape of the heat exchange flow channel 123 can be flexibly adjusted to meet the requirements of different batteries 100.

[0150] According to some embodiments of the present application, please refer to Figure 8 and Figure 9 , the first wall 1211 further includes a plurality of partition portions 12113, the plurality of partition portions 12113 are arranged at intervals along the third direction Z, and the partition portions 12113 divide the first cavity 125 into a plurality of sub-cavities 1251 arranged along the third direction Z. Two adjacent sub-cavities 1251 communicate with each other, and the inlet 1231 and the outlet 1232 communicate with two sub-cavities 1251 located at both ends among the plurality of sub-cavities 1251 respectively. The first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs.

[0151] The partition portion 12113 divides the first cavity 125 into a plurality of sub-cavities 1251 arranged along the third direction Z, and two adjacent sub-cavities 1251 communicate with each other, which means that the fluid pressure in the sub-cavity 1251 is greater than the fluid pressure in the entire cavity without the partition portion 12113, and the risk of the heat exchange medium staying in the heat exchange flow channel 123 during flow is lower.

[0152] If the partition portion 12113 is not provided, when the fluid pressure of the heat exchange medium is insufficient or the amount is small, some positions of the heat exchange flow channel 123 may not flow through the heat exchange medium, and the heat exchange medium directly flows out of the heat exchange flow channel 123 from the outlet 1232. The partition portion 12113 can ensure that at least part of the heat exchange medium flows through each sub-cavity 1251, making the heat exchange of the heat exchange flow channel 123 more uniform.

[0153] The partition portion 12113 can be regarded as a reinforcing rib inside the first wall 1211, and to a certain extent, it also improves the structural strength of the first wall 1211.

[0154] In the above solution, the partition portion 12113 divides the first cavity 125 into a plurality of sub-cavities 1251 arranged along the third direction Z. Two adjacent sub-cavities 1251 communicate with each other. The inlet 1231 and the outlet 1232 are respectively communicated with two sub-cavities 1251 located at both ends among the plurality of sub-cavities 1251. With such a design, on the one hand, the heat exchange medium can flow more uniformly, thereby improving the heat exchange uniformity of the battery cell 12. At the same time, the risk of the heat exchange medium staying in the heat exchange channel 123 during flow can be reduced, further improving the reliability of the battery cell 12. On the other hand, the strength of the first wall 1211 can also be improved, improving the reliability of the battery cell 12.

[0155] Please refer to Figure 8 and Figure 9 , the plurality of partition portions 12113 include a first partition portion 12113a and a second partition portion 12113b alternately arranged along the third direction Z. One end of the first partition portion 12113a is connected to the second wall 1212, and a second gap 126 is formed between the other end of the first partition portion 12113a and the third wall 1213. One end of the second partition portion 12113b is connected to the third wall 1213, and a third gap 127 is formed between the other end of the second partition portion 12113b and the second wall 1212. The second gap 126 communicates with two sub-cavities 1251 on both sides of the first partition portion 12113a, and the third gap 127 communicates with two sub-cavities 1251 on both sides of the second partition portion 12113b.

[0156] One end of the first partition portion 12113a is connected to the second wall 1212, and a second gap 126 is formed between the other end of the first partition portion 12113a and the third wall 1213. One end of the second partition portion 12113b is connected to the third wall 1213, and a third gap 127 is formed between the other end of the second partition portion 12113b and the second wall 1212, which means that the first gap 124 and the second gap 126 are relatively arranged along the second direction Y, and in the third direction Z, the first gap 124 and the second gap 126 are alternately arranged. Generally, the temperature of the heat exchange medium flowing out of the sub-cavity 1251 is relatively high, and the temperature of the heat exchange medium flowing into the sub-cavity 1251 is relatively low. Please refer to Figure 9 , with such a setting, the heat exchange medium flows reciprocally and reversely up and down in the heat exchange channel 123. Among adjacent sub-cavities 1251, part of the heat exchange medium flowing out of the sub-cavity 1251 and part of the heat exchange medium flowing into the adjacent sub-cavity 1251 are adjacent to each other, and the temperature distribution of the heat exchange channel 123 is relatively uniform. If the temperature of the heat exchange medium is lower closer to the inlet 1231 and higher closer to the outlet 1232, after being fed back to the battery cell 12, heat accumulation will occur at the position of the battery cell 12 on the side closer to the outlet 1232, and the heat exchange effect is poor, thereby reducing the reliability of the battery cell 12.

[0157] In the above solution, the second gap 126 and the third gap 127 are respectively located at both ends of the second direction Y, and the multiple second gaps 126 and the multiple third gaps 127 are alternately distributed along the third direction Z, so that the heat exchange medium flows reciprocally and reversely in the second direction Y, which can further improve the heat exchange uniformity of the battery cell 12.

[0158] According to some embodiments of the present application, please refer to Figures 8 to 11 , a plurality of first partition portions 12113a are provided, and a plurality of first grooves 128 are provided on the inner surface of the second wall 1212. The plurality of first grooves 128 are spaced along the third direction Z and correspond one-to-one to the plurality of first partition portions 12113a. One end of the first partition portion 12113a is inserted into the corresponding first groove 128. A plurality of second partition portions 12113b are provided, and a plurality of second grooves 129 are provided on the inner surface of the third wall 1213. The plurality of second grooves 129 are spaced along the third direction Z and correspond one-to-one to the plurality of second partition portions 12113b. One end of the second partition portion 12113b is inserted into the corresponding second groove 129.

[0159] The inner surfaces of the first groove 128 and the second groove 129 can contact at least three surfaces of the corresponding partition portion 12113, which is equivalent to sealing the sub-cavity 1251.

[0160] The inner surfaces of the first groove 128 and the second groove 129 can be bonded to the corresponding partition portion 12113 by sealant.

[0161] In the above solution, the inner surfaces of the first groove 128 and the second groove 129 can be used as the sealing surfaces of the heat exchange flow path 123, reducing the risk of the heat exchange medium contacting the electrode assembly 122 and improving the reliability of the battery cell 12.

[0162] According to some embodiments of the present application, please refer to Figure 3 and Figure 12 , the housing 120 further includes a third wall 1213, the third wall 1213 is disposed opposite to the second wall 1212, and the battery cell 12 further includes an electrode terminal 1210, and the electrode terminal 1210 is disposed on the third wall 1213.

[0163] The electrode terminal 1210 of the battery cell 12 is a component connecting the electrode assembly 122 and other components in the battery 100 such as a bus bar, and is a channel for the electrical energy output of the battery cell 12. It is usually made of a metal material such as copper or aluminum, and its shape is also different according to the type of the battery cell 12.

[0164] In the above solution, the electrode terminal 1210 is disposed on the third wall 1213. The third wall 1213 does not include the heat exchange flow channel 123, and has relatively high structural stability, enabling the electrode terminal 1210 to withstand greater stress, reducing the risk of connection failure of the electrode terminal 1210, and improving the reliability of the battery cell 12.

[0165] According to some embodiments of the present application, please refer to Figure 3 and Figure 12 , the housing 120 further includes a third wall 1213. The third wall 1213 is disposed opposite to the second wall 1212. The battery cell 12 further includes a pressure relief mechanism 1230, and the pressure relief mechanism 1230 is disposed on the third wall 1213.

[0166] When the battery cell 12 is in thermal runaway, the high-temperature and high-pressure emissions are discharged in the direction where the pressure relief mechanism 1230 of the battery cell 12 is disposed, and more specifically, can be discharged along the direction towards the area where the pressure relief mechanism 1230 is opened. The power and destructive force of such emissions may be very large, and may even be sufficient to break through one or more structures in this direction. In the embodiment where the pressure relief mechanism 1230 is a scored groove, when the battery cell 12 is in thermal runaway, the scored groove will rupture to form an opening for the emissions to pass through smoothly.

[0167] In the above solution, the pressure relief mechanism 1230 is disposed on the third wall 1213. The third wall 1213 does not include the heat exchange flow channel 123, and has relatively high structural stability, reducing the risk of abnormal opening of the pressure relief mechanism 1230 and improving the reliability of the battery cell 12.

[0168] According to some embodiments of the present application, please refer to Figure 3 , Figure 9 , Figure 12 and Figure 13 , the housing 120 includes a housing body 1201, a first end cap 1202, and a second end cap 1203. The housing body 1201 includes a first side wall 12011 and a second side wall 12012 that are disposed opposite to each other in the first direction X, and a third side wall 12013 and a fourth side wall 12014 that are disposed opposite to each other in the third direction Z. The first side wall 12011, the second side wall 12012, the third side wall 12013, and the fourth side wall 12014 enclose a receiving cavity 1204 having a first opening and a second opening. The first end cap 1202 closes the first opening, and the second end cap 1203 closes the second opening. The first end cap 1202 and the second end cap 1203 are disposed opposite to each other in the second direction Y. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other pairwise. The first side wall 12011 is the first wall 1211, the first end cap 1202 is the second wall 1212, and the second end cap 1203 is the third wall 1213.

[0169] The material of the housing 120 may be metal, for example, aluminum, steel, etc.

[0170] The housing 1201 can be integrally formed by an aluminum extrusion process. Among them, the positions of the first gap 124 and the second gap 126 can be formed by machining.

[0171] The first end cap 1202 and the second end cap 1203 can be integrally die-cast.

[0172] Among them, annular grooves surrounding the first opening and the second opening can be machined on the edges at both ends of the housing 1201 in the second direction Y. The first end cap 1202 and the second end cap 1203 can be machined with pits so that the edges of the first end cap 1202 and the second end cap 1203 form annular flanges corresponding to the annular grooves. After the first end cap 1202 closes the first opening and the second end cap 1203 closes the second opening, the annular flanges can be snapped onto the annular grooves to form an external seal of the battery cell 12. For example, the first end cap 1202 and the housing 1201, and the second end cap 1203 and the housing 1201 can be connected by welding. For another example, a seal can be installed between the annular groove and the annular flange.

[0173] In the above solution, the first side wall 12011, the second side wall 12012, the third side wall 12013, and the fourth side wall 12014 enclose a receiving cavity 1204 having a first opening and a second opening. The first end cap 1202 closes the first opening, the second end cap 1203 closes the second opening, the first end cap 1202 and the second end cap 1203 are disposed opposite to each other in the second direction Y, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. With such a design, the housing 1201, the first end cap 1202, and the second end cap 1203 can be separately machined and then assembled to form the outer shell 120. The heat exchange channel 123 can be extruded and formed together with the housing 1201, which simplifies the design, manufacturing, and assembly difficulties of the battery cell 12.

[0174] According to some embodiments of the present application, please refer to Figure 3 and Figure 12 , the length of the battery cell 12 is L, the width of the battery cell 12 is W, and the thickness of the battery cell 12 is H, satisfying: 4 ≤ L / W ≤ 12, 12 ≤ L / H ≤ 60.

[0175] The ratio of the length to the width of the battery cell 12 can be any value greater than or equal to 4 and less than or equal to 12. For example, 4, 5, 6, 7, 8, 9, 10, 11, 12.

[0176] The ratio of the length to the thickness of the battery cell 12 can be any value greater than or equal to 12 and less than or equal to 60. For example, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60.

[0177] The battery cell 12 with dimensions satisfying an aspect ratio greater than or equal to 4 and less than or equal to 12 and a length-to-thickness ratio greater than or equal to 12 and less than or equal to 60 has a blade-like shape and can be called a blade battery cell. When it conducts heat exchange, there is a greater risk of uneven heat exchange in its length direction. Please refer to Figure 12 , the third direction Z is parallel to the length direction of the battery cell 12, the second direction Y is parallel to the width direction of the battery cell 12, and the first direction X is parallel to the thickness direction of the battery cell 12.

[0178] In the above solution, 4 ≤ L / W ≤ 12, 12 ≤ L / H ≤ 60. The battery cell 12 has a relatively large size in its length direction and has higher heat exchange requirements. The wall of the housing 120 is formed with a heat exchange flow channel 123 for accommodating a heat exchange medium, which can significantly improve the heat exchange effect of the battery cell 12. Furthermore, the reliability of the battery 100 is significantly improved.

[0179] According to some embodiments of the present application, please refer to Figure 14 and Figure 15 , the present application provides a thermal management component 13. The thermal management component 13 is used to regulate the temperature of the battery cell 12. The battery cell 12 has a heat exchange flow channel 123 for accommodating a heat exchange medium. The thermal management component 13 includes a body 130. The body 130 is provided with an independent inlet flow channel 131 and an outlet flow channel 132. The inlet flow channel 131 is used to communicate with the inlet 1231 of the heat exchange flow channel 123, and the outlet flow channel 132 is used to communicate with the outlet 1232 of the heat exchange flow channel 123.

[0180] The body 130 is provided with an independent inlet flow channel 131 and an outlet flow channel 132, which means that the inlet flow channel 131 and the outlet flow channel 132 are not directly connected, but are indirectly connected through the heat exchange flow channel 123. In the thermal management component 13, there will not be excessive heat exchange between the inlet flow channel 131 and the outlet flow channel 132, so that the temperature of the heat exchange medium entering the battery cell 12 through the inlet flow channel 131 can always be maintained at a relatively low temperature to improve the heat exchange effect of the thermal management component 13.

[0181] For a single battery cell 12, the heat exchange medium always flows unidirectionally through the liquid inlet channel 131, the heat exchange channel 123, and the liquid outlet channel 132, and there is no reciprocating circular flow. In other words, the heat exchange medium with a lower temperature always flows through the battery cell 12, and the heat exchange medium that has already undergone heat exchange will not flow through a single battery cell 12 repeatedly. This improves the heat exchange efficiency and effect of the heat management component 13.

[0182] There is also a flow of the heat exchange medium within the body 130 itself, and it also has a heat exchange function, which is equivalent to further heat exchanging the battery cell 12.

[0183] In the above solution, the body 130 is provided with an independent liquid inlet channel 131 and a liquid outlet channel 132. Such a design reduces the risk that excessive heat exchange between the liquid inlet channel 131 and the liquid outlet channel 132 will reduce the heat exchange effect of the heat management component 13. At the same time, for a single battery cell 12, it is beneficial to achieve the unidirectional circular flow of the heat exchange medium in the heat management component 13 and improve the heat exchange effect of the heat management component 13. The liquid inlet channel 131 is used to communicate with the inlet 1231 of the heat exchange channel 123, and the liquid outlet channel 132 is used to communicate with the outlet 1232 of the heat exchange channel 123. With such a design, after the heat management component 13 is combined with the battery cell 12, the heat exchange medium can flow between the body 130 - the battery cell 12 - the body 130, improving the heat exchange effect of the heat management component 13 on the battery cell 12, and thus improving the reliability of the battery 100.

[0184] According to some embodiments of the present application, please refer to Figures 16 - 23 The liquid inlet channel 131 includes a liquid inlet 1311 and a plurality of first communication ports 1312, and the first communication ports 1312 are used to communicate with the inlet 1231 of the heat exchange channel 123. The liquid outlet channel 132 includes a liquid outlet 1321 and a plurality of second communication ports 1322, and the second communication ports 1322 are used to communicate with the outlet 1232 of the heat exchange channel 123. The first communication ports 1312 and the second communication ports 1322 are in one-to-one correspondence. Each first communication port 1312 and the corresponding second communication port 1322 are spaced apart along the third direction Z. The plurality of first communication ports 1312 and the plurality of second communication ports 1322 are arranged in two rows, and the arrangement direction of each row of communication ports is the first direction X, and the first direction X is perpendicular to the third direction Z.

[0185] The one-to-one correspondence between the first communication ports 1312 and the second communication ports 1322 means that each first communication port 1312 and the corresponding second communication port 1322 correspond to an inlet 1231 and an outlet 1232 of a heat exchange channel 123. This reduces the risk of uneven heat exchange of the battery cells 12 caused by the same part of the heat exchange medium flowing through multiple battery cells 12.

[0186] Meanwhile, when the battery management system indicates that a certain battery cell 12 has a temperature abnormality, the corresponding first communication port 1312 and second communication port 1322 can be maintained or replaced separately. For example, the abnormality is caused by failure of the sealing of the communication port.

[0187] In each row of communication ports, all of them may be first communication ports 1312 or all of them may be second communication ports 1322. For example, please refer to Figure 21 , the lower row of communication ports are all first communication ports 1312, and the upper row of communication ports are all second communication ports 1322. In each row of communication ports, the first communication ports 1312 and the second communication ports 1322 may also be included. The first communication ports 1312 and the second communication ports 1322 may be randomly distributed. For example, please refer to Figure 22 In each row of communication ports, every two first communication ports 1312 and every two second communication ports 1322 are alternately distributed. Figure 23 The first communication openings 1312 and the second communication openings 1322 are alternately distributed along the first direction X.

[0188] In the above scheme, the liquid inlet channel 131 includes a liquid inlet 1311 and a plurality of first connecting ports 1312, and the first connecting port 1312 is used to communicate with the inlet 1231 of the heat exchange channel 123. The liquid outlet channel 132 includes a liquid outlet 1321 and a plurality of second connecting ports 1322, and the second connecting port 1322 is used to communicate with the outlet 1232 of the heat exchange channel 123. The first connecting ports 1312 and the second connecting ports 1322 correspond one to one, and each first connecting port 1312 and the corresponding second connecting port 1322 are arranged at intervals along the third direction Z. The plurality of first connecting ports 1312 and the plurality of second connecting ports 1322 are arranged in two rows, and the arrangement direction of each row of connecting ports is the first direction X. Such a design, on the one hand, can make the thermal management component 13 adapt to the heat exchange requirements of multiple battery cells 12, and each battery cell 12 has a corresponding heat exchange channel, thereby improving the heat exchange uniformity of the thermal management component 13. On the other hand, when the thermal management component 13 needs maintenance, the corresponding heat exchange channel between the first connecting port 1312 and the second connecting port 1322 can be maintained in a targeted manner, thereby improving maintenance efficiency and reducing maintenance costs.

[0189] According to some embodiments of this application, please refer to Figure 14 , Figure 15 and Figure 19 The thermal management component 13 also includes a plurality of plug-in parts 133 , which are protruding from the outer surface of the body 130 , and the plug-in parts 133 correspond to the connecting ports one by one, and the plug-in parts 133 are used to be plugged with the inlet 1231 or the outlet 1232 of the heat exchange channel 123 .

[0190] The plug-in portion 133 may be integrally formed with a portion of the body 130 .

[0191] In some embodiments, the body 130 may include a first plate 134 and a second plate 135. The insertion portion 133 is disposed on the first plate 134, and the liquid inlet channel 131 and the liquid outlet channel 132 are disposed on the second plate 135. A through hole penetrating the inner surface of the first plate 134 may be machined on the surface of the insertion portion 133, and the through hole communicates with the liquid inlet channel 131 or the liquid outlet channel 132 to form a communication port.

[0192] In the above solution, the battery cell 12 is inserted into the insertion portion 133 to achieve the assembly of the battery cell 12 and the thermal management component 13, and to connect the liquid inlet channel 131, the liquid outlet channel 132 and the heat exchange channel 123 to form a loop for the heat exchange medium to flow. The assembly difficulty of the thermal management component 13 is reduced, and the assembly efficiency of the thermal management component 13 is improved.

[0193] According to some embodiments of the present application, please refer to Figure 23 and Figure 24 , in each row of communication ports, the first communication port 1312 and the second communication port 1322 are alternately distributed along the first direction X.

[0194] The temperature at the first communication port 1312 is generally lower, and the temperature at the second communication port 1322 is generally higher. The alternating distribution of the first communication port 1312 and the second communication port 1322 along the first direction X means that the temperatures at the first communication port 1312 and the second communication port 1322 are balanced, and further the temperature of each row of communication ports is balanced, and the temperature distribution of the entire thermal management component 13 is relatively uniform.

[0195] When heat accumulates at a certain location of the thermal management component 13, the feedback to the battery cell 12 will cause the heat exchange effect in the area corresponding to the location where the heat accumulates between the battery cell 12 and the thermal management component 13 to deteriorate, reducing the reliability of the battery 100. Heat accumulation may cause the problem of thermal stress concentration. Thermal stress concentration refers to the phenomenon of stress concentration in a local area of an object caused by temperature change. When there is an uneven temperature distribution inside an object, thermal stress will be generated inside the object. Thermal stress concentration will affect the structural integrity and stability of the object, and may cause problems such as material fatigue, fracture, and warping. Therefore, if heat accumulation occurs in the thermal management component 13 resulting in thermal stress concentration, it will also cause the reliability of the thermal management component 13 itself to decrease and the lifespan to be reduced.

[0196] In the above solution, in each row of communication ports, the first communication port 1312 and the second communication port 1322 are alternately distributed along the first direction X. Such a design balances the temperature difference between the first communication port 1312 and the second communication port 1322 while enabling the heat management component 13 to have a high heat exchange effect, reducing the risk that the heat exchange effect of the heat management component 13 decreases due to heat accumulation in the heat management component 13. At the same time, the risk of thermal stress concentration in the heat management component 13 is reduced, and the reliability of the heat management component 13 is improved.

[0197] According to some embodiments of the present application, please refer to Figure 23 and Figure 24 , the liquid inlet flow channel 131 includes two first shunt channels 1313 arranged at intervals along the third direction Z. Each first shunt channel 1313 is connected with a plurality of first branch channels 1314. One end of the first branch channel 1314 is communicated with the first shunt channel 1313, and the first communication port 1312 is arranged at the other end of the first branch channel 1314.

[0198] Each first shunt channel 1313 is connected with a plurality of first branch channels 1314. One end of the first branch channel 1314 is communicated with the first shunt channel 1313, and the first communication port 1312 is arranged at the other end of the first branch channel 1314. This means that the extending directions of the first shunt channel 1313 and the first branch channel 1314 are different. The more flow channels there are, the larger the heat exchange area of the heat management component 13.

[0199] The turbulence effect mainly refers to the phenomenon of the change in the flow state due to being disturbed during the fluid flow process. In the heat management component 13, the turbulence effect usually refers to the change in the flow state caused by factors such as the flow channel structure, flow direction, and flow velocity during the flow process of the heat exchange medium, thereby affecting the heat exchange effect. The turbulence effect can be achieved by changing the flow state of the heat exchange medium and increasing the turbulence degree of the fluid. The change in the flow direction of the heat exchange medium can enhance the turbulence degree of the heat management component 13. It can make the heat exchange medium flow faster in the heat management component 13, thereby reducing the residence time of the heat exchange medium in the flow channel and improving the heat dissipation efficiency.

[0200] The retention of the heat exchange medium can be understood as the situation where the heat exchange medium remains in the flow channel for too long, thereby slowing down the heat exchange.

[0201] In the above solution, the liquid inlet flow channel 131 includes two first shunt channels 1313 arranged at intervals along the third direction Z. Such a design enriches the cooperation mode between the heat management component 13 and the battery cell 12, improving the adaptability of the heat management component 13. Each first shunt channel 1313 is connected to a plurality of first branch channels 1314. One end of the first branch channel 1314 communicates with the first shunt channel 1313, and the first communication port 1312 is arranged at the other end of the first branch channel 1314. Such a design increases the heat exchange area of the heat management component 13, improving the heat exchange effect of the heat management component 13. At the same time, it enhances the turbulence effect of the liquid inlet flow channel 131 and the heat exchange effect. To a certain extent, it can also reduce the risk of heat exchange medium retention in the liquid inlet flow channel 131, making the temperature distribution of the liquid inlet flow channel 131 more uniform while improving the heat exchange effect of the heat management component 13, and enhancing the reliability.

[0202] According to some embodiments of the present application, please refer to Figure 23 and Figure 24 , the liquid inlet flow channel 131 further includes a first main channel 1315. The first main channel 1315 connects the two first shunt channels 1313, and the first main channel 1315 communicates with the liquid inlet 1311.

[0203] The first main channel 1315 connects the two first shunt channels 1313 and communicates with the liquid inlet 1311, which means that the number of flow channels of the liquid inlet flow channel 131 is further enriched.

[0204] In the above solution, the liquid inlet flow channel 131 further includes a first main channel 1315. The first main channel 1315 connects the two first shunt channels 1313, and the first main channel 1315 communicates with the liquid inlet 1311. This further refines the distribution of the liquid inlet flow channel 131, increases the heat exchange area of the heat management component 13, and improves the heat exchange effect of the heat management component 13.

[0205] According to some embodiments of the present application, please refer to Figure 23 and Figure 24 , the liquid outlet flow channel 132 includes two second shunt channels 1323 arranged at intervals along the third direction Z. Each second shunt channel 1323 is connected to a plurality of second branch channels 1324. One end of the second branch channel 1324 communicates with the second shunt channel 1323, and the second communication port 1322 is arranged at the other end of the second branch channel 1324.

[0206] Each second shunt channel 1323 is connected to a plurality of second branch channels 1324. One end of the second branch channel 1324 communicates with the second shunt channel 1323, and the second communication port 1322 is arranged at the other end of the second branch channel 1324, which means that the extending directions of the second shunt channel 1323 and the second branch channel 1324 are different. The more flow channels there are, the larger the heat exchange area of the heat management component 13 will be.

[0207] In the above solution, the liquid outlet flow channel 132 includes two second shunt channels 1323 arranged at intervals in the third direction Z. Such a design enriches the cooperation mode between the heat management component 13 and the battery cell 12, and improves the adaptability of the heat management component 13. Each second shunt channel 1323 is connected with a plurality of second branch channels 1324. One end of the second branch channel 1324 is communicated with the second shunt channel 1323, and the second communication port 1322 is arranged at the other end of the second branch channel 1324. Such a design increases the heat exchange area of the heat management component 13 and improves the heat exchange effect of the heat management component 13. At the same time, the turbulence effect of the liquid outlet flow channel 132 is enhanced, and the heat exchange effect is enhanced. To a certain extent, the risk of heat exchange medium retention in the liquid outlet flow channel 132 can also be reduced, and while improving the heat exchange effect of the heat management component 13, the temperature distribution of the liquid outlet flow channel 132 is made more uniform, and the reliability is improved.

[0208] According to some embodiments of the present application, please refer to Figure 23 and Figure 24 , the liquid outlet flow channel 132 further includes a second main channel 1325. The second main channel 1325 connects the two second shunt channels 1323, and the second main channel 1325 is communicated with the liquid outlet 1321.

[0209] The second main channel 1325 connects the two second shunt channels 1323, and the second main channel 1325 is communicated with the liquid outlet 1321, which means that the number of flow channels of the liquid outlet flow channel 132 is further enriched.

[0210] In the above solution, the liquid outlet flow channel 132 further includes a second main channel 1325. The second main channel 1325 connects the two second shunt channels 1323, and the second main channel 1325 is communicated with the liquid outlet 1321. The distribution of the liquid outlet flow channel 132 is further refined, the heat exchange area of the heat management component 13 is increased, and the heat exchange effect of the heat management component 13 is improved.

[0211] According to some embodiments of the present application, please refer to Figure 23 , in the third direction Z, the two first shunt channels 1313 are located between the two second shunt channels 1323. Each first branch channel 1314 extends from the first shunt channel 1313 where it is located in a direction away from the other first shunt channel 1313. Each second branch channel 1324 extends from the second shunt channel 1323 where it is located in a direction away from the other second shunt channel 1323. The first branch channels 1314 and the second branch channels 1324 are arranged in an alternating manner along the first direction X.

[0212] The above setting means that each first shunt channel 1313 and each second shunt channel 1323 are both located between a first branch channel 1314 and a second branch channel 1324.

[0213] Generally, the liquid inlet 1311 and the liquid outlet 1321 are both located in the middle of the heat management component 13. For example, please refer to Figure 23 , the liquid inlet 1311 and the liquid outlet 1321 are located at both ends of the heat management component 13 in the first direction X, and are both located in the middle of the third direction Z. The temperature in the middle regions of the heat management component 13 in the third direction Z and the second direction Y is relatively low. And the above-mentioned middle regions are generally the regions where the battery cells 12 are arranged. The above arrangement can further improve the heat exchange effect of the heat management component 13 on the battery cells 12. At the same time, the distance for the heat exchange medium to flow into the battery cells 12 is relatively short, which can enable the heat exchange medium to enter the battery cells 12 faster.

[0214] In the above solution, in the third direction Z, the two first diversion channels 1313 are located between the two second diversion channels 1323. Each first branch channel 1314 extends from the first diversion channel 1313 where it is located in a direction away from the other first diversion channel 1313. Each second branch channel 1324 extends from the second diversion channel 1323 where it is located in a direction away from the other second diversion channel 1323. The first branch channels 1314 and the second branch channels 1324 are arranged in an alternating manner along the first direction X. Such a design makes each first diversion channel 1313 and each second diversion channel 1323 located between a first branch channel 1314 and a second branch channel 1324. At the same time, the first branch channels 1314 and the second branch channels 1324 are arranged in an alternating manner along the first direction X, which can further improve the temperature uniformity of the heat management component 13, and thus improve the reliability of the heat management component 13. On the other hand, in the third direction Z, the second diversion channel 1323 is farther from the center of the heat management component 13 than the first diversion channel 1313, which can further improve the heat exchange effect of the heat management component 13 on the battery cells 12. On the other hand, it can enable the heat exchange medium to flow into the battery cells 12 faster, improving the heat exchange efficiency of the heat management component 13.

[0215] According to some embodiments of the present application, please refer to Figure 24 , in the third direction Z, the two second diversion channels 1323 are located between the two first diversion channels 1313. Each second branch channel 1324 extends from the second diversion channel 1323 where it is located in a direction away from the other second diversion channel 1323. Each first branch channel 1314 extends from the first diversion channel 1313 where it is located in a direction away from the other first diversion channel 1313. The second branch channels 1324 and the first branch channels 1314 are arranged in an alternating manner along the first direction X.

[0216] The above arrangement means that each first diversion channel 1313 and each second diversion channel 1323 are both located between a first branch channel 1314 and a second branch channel 1324. And the cold and hot distribution positions of the first branch channels 1314 and the second branch channels 1324 are relatively uniform.

[0217] In the above solution, in the third direction Z, two second sub-channels 1323 are located between two first sub-channels 1313. Each second branch channel 1324 extends from the second sub-channel 1323 where it is located in a direction away from the other second sub-channel 1323. Each first branch channel 1314 extends from the first sub-channel 1313 where it is located in a direction away from the other first sub-channel 1313. The second branch channels 1324 and the first branch channels 1314 are arranged alternately along the first direction X. Such a design can improve the temperature uniformity of the heat management component 13 to a certain extent, and further improve the reliability of the heat management component 13.

[0218] According to some embodiments of the present application, please refer to Figure 14 and Figure 23 , the heat management component 13 includes a first plate body 134 and a second plate body 135 arranged in a stacked manner. The side of the second plate body 135 facing the first plate body 134 has a third groove 1351 and a fourth groove 1352. The first plate body 134 covers the third groove 1351 to form an inlet flow channel 131, and the first plate body 134 covers the fourth groove 1352 to form an outlet flow channel 132. A first communication port 1312 and a second communication port 1322 are arranged on the first plate body 134.

[0219] The second plate body 135 can be formed with the third groove 1351 and the fourth groove 1352 by integral stamping, die-casting or machining.

[0220] The first plate body 134 and the second plate body 135 can be connected by welding, bolt connection, bonding or other means.

[0221] In the above solution, the side of the second plate body 135 facing the first plate body 134 has a third groove 1351 and a fourth groove 1352. The first plate body 134 covers the third groove 1351 to form an inlet flow channel 131, and the first plate body 134 covers the fourth groove 1352 to form an outlet flow channel 132. A first communication port 1312 and a second communication port 1322 are arranged on the first plate body 134. The third groove 1351 and the fourth groove 1352 can be formed in one step by processing methods such as integral die-casting. Only by covering the second plate body 135 with the first plate body 134 can the inlet flow channel 131 and the outlet flow channel 132 be formed, with high manufacturing efficiency and low cost.

[0222] According to some embodiments of the present application, please refer to Figures 2 - 26, this application provides a battery 100, including the battery cell 12 described in any of the above solutions and the thermal management component 13 described in any of the above directions. A plurality of battery cells 12 are arranged along the first direction X. The thermal management component 13 is used to adjust the temperature of the battery cell 12. The liquid inlet channel 131 is communicated with the inlet 1231 of the heat exchange channel 123, and the liquid outlet channel 132 is communicated with the outlet 1232 of the heat exchange channel 123.

[0223] Please refer to Figure 15 , the battery cell 12 can be directly inserted into the thermal management component 13 along the Figure 15 dashed arrow in, without external pipe interfaces, current collectors or connecting pipes and other accessory parts, making the structure of the battery 100 more compact, so that the box 11 can accommodate more battery cells 12.

[0224] In some embodiments, the thermal management component 13 can be pre-formed with an insertion part 133. The inlet 1231 and the outlet 1232 of the heat exchange channel 123 of the battery cell 12 can be arranged on the wall of the outer shell 120, and the inlet 1231, the outlet 1232 and the insertion part 133 can be self-positioning. The positioning process when the battery cell 12 is put into the box is omitted, and no additional positioning parts or positioning portions are required. The assembly efficiency is improved, and the maintenance and development costs are reduced. After the battery cell 12 and the insertion part 133 are inserted and matched, the sealing performance of the insertion position can be improved by welding or bonding with sealant.

[0225] In the above solution, on the premise of using relatively few accessory parts, the heat exchange channel 123 and the thermal management component 13 can exchange heat with the battery cell 12 at the same time, improving the heat exchange effect of the battery cell 12, and further improving the reliability of the battery 100. At the same time, a large amount of assembly space is saved, and the energy density of the battery 100 is improved. On the other hand, the manufacturing and assembly costs of the battery 100 are reduced.

[0226] According to some embodiments of the present application, please refer to Figures 2 - 26 , the flow directions of the heat exchange media in two adjacent battery cells 12 are opposite.

[0227] Please refer to Figure 26 , in the first direction X, a plurality of battery cells 12 are sequentially distributed between the liquid inlet 1311 and the liquid outlet 1321. Taking two battery cells 12 as an example, the one close to the liquid inlet 1311 is the first battery cell, and the one close to the liquid outlet 1321 is the second battery cell. Please refer to Figure 26 the solid arrow in, the heat exchange medium enters from the thermal management component 13, and flows through the first battery cell 12 in the direction from the lower left to the upper right, and then flows out from the thermal management component 13. At the same time, please refer to Figure 26For the hollow arrow, the heat exchange medium enters from the heat management component 13, flows through the second battery cell along the direction from the upper right to the lower left, and then flows out from the heat management component 13. First of all, the heat exchange media flowing in the first battery cell and the second battery cell are basically not the same heat exchange medium, that is to say, it is basically impossible for the same part of the heat exchange medium to flow through two different battery cells 12. Secondly, the relatively low-temperature heat exchange medium entering the heat management component 13 from the liquid inlet 1311 can flow into each battery cell 12 more quickly. In addition, the flow directions of the heat exchange media of two adjacent battery cells 12 are opposite. For example, on the adjacent surfaces of the first battery cell and the second battery cell in the first direction X, whether from the lower left to the upper right or from the upper right to the lower left, there is a relatively low-temperature heat exchange medium flowing, reducing the risk of heat accumulation between adjacent battery cells 12, and further improving the heat exchange effect of multiple battery cells 12.

[0228] In the above solution, the flow directions of the heat exchange media in two adjacent battery cells 12 are opposite. Such a design makes the heat exchange uniformity between every two adjacent battery cells 12 higher, reduces the risk of thermal stress concentration, improves the reliability of the battery cells 12, and at the same time, improves the heat exchange effect of the battery 100, and further improves the reliability of the battery 100.

[0229] According to some embodiments of the present application, please refer to Figures 2 - 26 , the housing 120 includes a first wall 1211 and a second wall 1212 arranged adjacent to each other. The second wall 1212 is thermally connected to the heat management component 13. The inlet 1231 and the outlet 1232 are arranged on the second wall 1212, and at least a part of the heat exchange flow channel 123 is formed on the first wall 1211.

[0230] The second wall 1212 is thermally connected to the heat management component 13. The inlet 1231 and the outlet 1232 are arranged on the second wall 1212, and at least a part of the heat exchange flow channel 123 is formed on the first wall 1211. This means that the heat exchange medium flows on three sides of most of the battery cells 12. Please refer to Figure 25 and Figure 26 , except for the battery cells 12 at both ends in the first direction X, first, there is its own heat exchange medium flow on the first wall 1211 of each battery cell 12. Second, among two adjacent battery cells 12, one of the battery cells 12 can also exchange heat with the heat exchange medium in the first wall 1211 of the adjacent battery cell 12 through the wall surface opposite to its first wall 1211 along the first direction X. Third, the heat management component 13 itself has a flow channel for the heat exchange medium to flow. During the process of the heat exchange medium flowing inside the heat management component 13, it will also reduce the temperature of the heat management component 13 itself. Then the heat management component 13 can provide heat exchange to the second wall 1212.

[0231] Meanwhile, in the case where two adjacent battery cells 12 are attached to each other along the first direction X, the above solution can improve the heat exchange effect of the battery cell 12. In other words, there is no need to add a new heat management component 13 between two adjacent battery cells 12. On the premise of enabling the battery 100 to have a high volumetric energy density, it also has high reliability.

[0232] In the above solution, the housing 120 includes a first wall 1211 and a second wall 1212 arranged adjacent to each other. The second wall 1212 is thermally connected to the heat management component 13. The inlet 1231 and the outlet 1232 are provided on the second wall 1212, and at least a part of the heat exchange flow channel 123 is formed on the first wall 1211. With such a design, among multiple battery cells 12, heat exchange exists on at least three sides of at least some battery cells 12, further improving the heat exchange effect of the battery cell 12, and thus further improving the reliability of the battery cell 12.

[0233] According to some embodiments of the present application, the present application provides an electrical device, including the battery cell 12 described in any of the above solutions, and the battery cell 12 is used to provide electrical energy. Alternatively, it includes the battery 100 described in any of the above solutions, and the battery 100 is used to provide electrical energy.

[0234] According to some embodiments of the present application, please refer to Figure 3 、 Figures 5 - 13 , the present application provides a battery cell 12, which includes a housing 120 and an electrode assembly 122, and the electrode assembly 122 is received in the housing 120. Among them, the wall of the housing 120 forms a heat exchange flow channel 123 for accommodating a heat exchange medium. The battery cell 12 is in the shape of a blade.

[0235] The housing 120 includes a housing body 1201, a first end cap 1202 and a second end cap 1203. The housing body 1201 includes a first side wall 12011 and a second side wall 12012 that are oppositely arranged along the first direction X, and a third side wall 12013 and a fourth side wall 12014 that are oppositely arranged along the third direction Z. The first side wall 12011, the second side wall 12012, the third side wall 12013 and the fourth side wall 12014 enclose a receiving cavity 1204 having a first opening and a second opening. The first end cap 1202 closes the first opening, and the second end cap 1203 closes the second opening. The first end cap 1202 and the second end cap 1203 are oppositely arranged along the second direction Y. The first direction X, the second direction Y and the third direction Z are perpendicular to each other pairwise. The first side wall 12011 is the first wall 1211, the first end cap 1202 is the second wall 1212, and the second end cap 1203 is the third wall 1213. The first wall 1211 is the wall with the largest area in the housing 120.

[0236] At least a part of the heat exchange flow path 123 is formed in the first wall 1211, and the inlet 1231 and the outlet 1232 are arranged on the second wall 1212.

[0237] The second end cap 1203, the first end cap 1202, the first sub-wall 12111 and the second sub-wall 12112 enclose a first cavity 125. The inlet 1231 and the outlet 1232 communicate with the first cavity 125. The second direction Y is perpendicular to the first direction X. The first wall 1211 further includes a plurality of partition portions 12113. The plurality of partition portions 12113 are arranged at intervals along the third direction Z. The partition portions 12113 divide the first cavity 125 into a plurality of sub-cavities 1251 arranged along the third direction Z. Two adjacent sub-cavities 1251 communicate with each other. The inlet 1231 and the outlet 1232 respectively communicate with two sub-cavities 1251 located at both ends among the plurality of sub-cavities 1251. The first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs. The plurality of partition portions 12113 include first partition portions 12113a and second partition portions 12113b arranged alternately along the third direction Z. One end of the first partition portion 12113a is connected to the second wall 1212, and a second gap 126 is formed between the other end of the first partition portion 12113a and the third wall 1213. One end of the second partition portion 12113b is connected to the third wall 1213, and a third gap 127 is formed between the other end of the second partition portion 12113b and the second wall 1212. The second gap 126 communicates with two sub-cavities 1251 on both sides of the first partition portion 12113a. The third gap 127 communicates with two sub-cavities 1251 on both sides of the second partition portion 12113b. A plurality of first partition portions 12113a are provided. A plurality of first grooves 128 are provided on the inner surface of the second wall 1212. The plurality of first grooves 128 are arranged at intervals along the third direction Z and correspond to the plurality of first partition portions 12113a one by one. One end of the first partition portion 12113a is inserted into the first groove 128 corresponding to it. A plurality of second partition portions 12113b are provided. A plurality of second grooves 129 are provided on the inner surface of the third wall 1213. The plurality of second grooves 129 are arranged at intervals along the third direction Z and correspond to the plurality of second partition portions 12113b one by one. One end of the second partition portion 12113b is inserted into the second groove 129 corresponding to it.

[0238] The battery cell 12 further includes an electrode terminal 1210 and a pressure relief mechanism 1230. The electrode terminal 1210 is arranged on the second end cap 1203. The pressure relief mechanism 1230 is arranged on the second end cap 1203.

[0239] According to some embodiments of the present application, please refer to Figures 14 - 20 and Figure 23, according to some embodiments of the present application, the present application provides a thermal management component 13 for regulating the temperature of the battery cell 12. The battery cell 12 has a heat exchange flow channel 123 for accommodating a heat exchange medium. The thermal management component 13 includes a body 130, and the body 130 is provided with an independent liquid inlet flow channel 131 and a liquid outlet flow channel 132. The liquid inlet flow channel 131 is used to communicate with the inlet 1231 of the heat exchange flow channel 123, and the liquid outlet flow channel 132 is used to communicate with the outlet 1232 of the heat exchange flow channel 123. The thermal management component 13 includes a first plate body 134 and a second plate body 135 stacked. The side of the second plate body 135 facing the first plate body 134 has a third groove 1351 and a fourth groove 1352. The first plate body 134 covers the third groove 1351 to form the liquid inlet flow channel 131, and the first plate body 134 covers the fourth groove 1352 to form the liquid outlet flow channel 132. The first communication port 1312 and the second communication port 1322 are arranged on the first plate body 134.

[0240] The liquid inlet flow channel 131 includes a liquid inlet 1311 and a plurality of first communication ports 1312. The first communication ports 1312 are used to communicate with the inlet 1231 of the heat exchange flow channel 123. The liquid outlet flow channel 132 includes a liquid outlet 1321 and a plurality of second communication ports 1322. The second communication ports 1322 are used to communicate with the outlet 1232 of the heat exchange flow channel 123. The first communication ports 1312 and the second communication ports 1322 are in one-to-one correspondence. Each first communication port 1312 and the corresponding second communication port 1322 are arranged at intervals in the third direction Z. The plurality of first communication ports 1312 and the plurality of second communication ports 1322 are arranged in two rows. The arrangement direction of each row of communication ports is the first direction X, and the first direction X is perpendicular to the third direction Z. The heat management component 13 further includes a plurality of plug-in parts 133. The plug-in parts 133 protrude from the outer surface of the main body 130. The plug-in parts 133 are in one-to-one correspondence with the communication ports. The plug-in parts 133 are used to be plugged into the inlet 1231 or the outlet 1232 of the heat exchange flow channel 123. The liquid inlet flow channel 131 includes two first shunt channels 1313 arranged at intervals in the third direction Z. Each first shunt channel 1313 is connected with a plurality of first branch channels 1314. One end of the first branch channel 1314 is communicated with the first shunt channel 1313, and the first communication port 1312 is arranged at the other end of the first branch channel 1314. The liquid inlet flow channel 131 further includes a first main channel 1315. The first main channel 1315 connects the two first shunt channels 1313, and the first main channel 1315 is communicated with the liquid inlet 1311. The liquid outlet flow channel 132 includes two second shunt channels 1323 arranged at intervals in the third direction Z. Each second shunt channel 1323 is connected with a plurality of second branch channels 1324. One end of the second branch channel 1324 is communicated with the second shunt channel 1323, and the second communication port 1322 is arranged at the other end of the second branch channel 1324. The liquid outlet flow channel 132 further includes a second main channel 1325. The second main channel 1325 connects the two second shunt channels 1323, and the second main channel 1325 is communicated with the liquid outlet 1321. In the third direction Z, the two first shunt channels 1313 are located between the two second shunt channels 1323. Each first branch channel 1314 extends from the first shunt channel 1313 where it is located in a direction away from the other first shunt channel 1313. Each second branch channel 1324 extends from the second shunt channel 1323 where it is located in a direction away from the other second shunt channel 1323. The first branch channels 1314 and the second branch channels 1324 are arranged in an alternating manner in the first direction X.

[0241] According to some embodiments of the present application, please refer to Figure 2 , Figure 25 and Figure 26, this application provides a battery 100, which includes battery cells 12 and a thermal management component 13, and multiple battery cells 12 are arranged along the first direction X. The battery cell 12 includes a housing 120 and an electrode assembly 122, and the electrode assembly 122 is received in the housing 120. Among them, a heat exchange flow channel 123 for accommodating a heat exchange medium is formed in the wall of the housing 120. The battery cell 12 is in a blade shape. The housing 120 includes a housing body 1201, a first end cap 1202, and a second end cap 1203. The housing body 1201 includes a first side wall 12011 and a second side wall 12012 that are oppositely arranged along the first direction X, and a third side wall 12013 and a fourth side wall 12014 that are oppositely arranged along the third direction Z. The first side wall 12011, the second side wall 12012, the third side wall 12013, and the fourth side wall 12014 enclose a receiving cavity 1204 with a first opening and a second opening. The first end cap 1202 closes the first opening, and the second end cap 1203 closes the second opening. The first end cap 1202 and the second end cap 1203 are oppositely arranged along the second direction Y. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. The first side wall 12011 is the first wall 1211, the first end cap 1202 is the second wall 1212, and the second end cap 1203 is the third wall 1213. The first wall 1211 is the wall with the largest area in the housing 120. At least a part of the heat exchange flow channel 123 is formed in the first wall 1211, and the inlet 1231 and the outlet 1232 are arranged on the second wall 1212. The second end cap 1203, the first end cap 1202, the first sub-wall 12111, and the second sub-wall 12112 enclose a first cavity 125. The inlet 1231 and the outlet 1232 communicate with the first cavity 125, and the second direction Y is perpendicular to the first direction X. The first wall 1211 further includes a plurality of partition parts 12113, and the plurality of partition parts 12113 are arranged at intervals along the third direction Z. The partition parts 12113 divide the first cavity 125 into a plurality of sub-cavities 1251 arranged along the third direction Z. Adjacent two sub-cavities 1251 communicate with each other. The inlet 1231 and the outlet 1232 respectively communicate with two sub-cavities 1251 located at both ends among the plurality of sub-cavities 1251. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. The plurality of partition parts 12113 include a first partition part 12113a and a second partition part 12113b that are alternately arranged along the third direction Z. One end of the first partition part 12113a is connected to the second wall 1212, and a second gap 126 is formed between the other end of the first partition part 12113a and the third wall 1213. One end of the second partition part 12113b is connected to the third wall 1213, and a third gap 127 is formed between the other end of the second partition part 12113b and the second wall 1212. The second gap 126 communicates with two sub-cavities 1251 on both sides of the first partition part 12113a, and the third gap 127 communicates with two sub-cavities 1251 on both sides of the second partition part 12113b.A plurality of first partition portions 12113a are provided. A plurality of first grooves 128 are provided on the inner surface of the second wall 1212. The plurality of first grooves 128 are spaced along the third direction Z and correspond to the plurality of first partition portions 12113a one by one. One end of the first partition portion 12113a is inserted into the corresponding first groove 128. A plurality of second partition portions 12113b are provided. A plurality of second grooves 129 are provided on the inner surface of the third wall 1213. The plurality of second grooves 129 are spaced along the third direction Z and correspond to the plurality of second partition portions 12113b one by one. One end of the second partition portion 12113b is inserted into the corresponding second groove 129. The battery cell 12 further includes an electrode terminal 1210 and a pressure relief mechanism 1230. The electrode terminal 1210 is provided on the second end cap 1203. The pressure relief mechanism 1230 is provided on the second end cap 1203.

[0242] The thermal management component 13 is used to regulate the temperature of the battery cell 12. The battery cell 12 has a heat exchange flow channel 123 for accommodating a heat exchange medium. The thermal management component 13 includes a body 130. The body 130 is provided with an independent liquid inlet flow channel 131 and a liquid outlet flow channel 132. The liquid inlet flow channel 131 is used to communicate with the inlet 1231 of the heat exchange flow channel 123, and the liquid outlet flow channel 132 is used to communicate with the outlet 1232 of the heat exchange flow channel 123. The thermal management component 13 includes a first plate body 134 and a second plate body 135 arranged in a stacked manner. The side of the second plate body 135 facing the first plate body 134 has a third groove 1351 and a fourth groove 1352. The first plate body 134 covers the third groove 1351 to form the liquid inlet flow channel 131, and the first plate body 134 covers the fourth groove 1352 to form the liquid outlet flow channel 132. A first communication port 1312 and a second communication port 1322 are arranged on the first plate body 134. The liquid inlet flow channel 131 includes a liquid inlet 1311 and a plurality of first communication ports 1312. The first communication ports 1312 are used to communicate with the inlet 1231 of the heat exchange flow channel 123. The liquid outlet flow channel 132 includes a liquid outlet 1321 and a plurality of second communication ports 1322. The second communication ports 1322 are used to communicate with the outlet 1232 of the heat exchange flow channel 123. The first communication ports 1312 and the second communication ports 1322 are in one-to-one correspondence. Each first communication port 1312 and its corresponding second communication port 1322 are arranged at intervals along the third direction Z. The plurality of first communication ports 1312 and the plurality of second communication ports 1322 are arranged in two rows. The arrangement direction of each row of communication ports is the first direction X, and the first direction X is perpendicular to the third direction Z. The thermal management component 13 further includes a plurality of plug-in parts 133. The plug-in parts 133 protrude from the outer surface of the body 130. The plug-in parts 133 are in one-to-one correspondence with the communication ports. The plug-in parts 133 are used to be plugged into the inlet 1231 or the outlet 1232 of the heat exchange flow channel 123. The liquid inlet flow channel 131 includes two first branch flow channels 1313 arranged at intervals along the third direction Z. Each first branch flow channel 1313 is connected with a plurality of first tributary flow channels 1314. One end of the first tributary flow channel 1314 is communicated with the first branch flow channel 1313, and the first communication port 1312 is arranged at the other end of the first tributary flow channel 1314. The liquid inlet flow channel 131 further includes a first main flow channel 1315. The first main flow channel 1315 connects the two first branch flow channels 1313, and the first main flow channel 1315 is communicated with the liquid inlet 1311. The liquid outlet flow channel 132 includes two second branch flow channels 1323 arranged at intervals along the third direction Z. Each second branch flow channel 1323 is connected with a plurality of second tributary flow channels 1324. One end of the second tributary flow channel 1324 is communicated with the second branch flow channel 1323, and the second communication port 1322 is arranged at the other end of the second tributary flow channel 1324. The liquid outlet flow channel 132 further includes a second main flow channel 1325. The second main flow channel 1325 connects the two second branch flow channels 1323, and the second main flow channel 1325 is communicated with the liquid outlet 1321.In the third direction Z, two first diversion channels 1313 are located between two second diversion channels 1323. Each first branch channel 1314 extends from the first diversion channel 1313 where it is located in a direction away from the other first diversion channel 1313. Each second branch channel 1324 extends from the second diversion channel 1323 where it is located in a direction away from the other second diversion channel 1323. The first branch channels 1314 and the second branch channels 1324 are arranged alternately along the first direction X.

[0243] The thermal management component 13 is used to adjust the temperature of the battery cell 12. The inlet flow channel 131 is communicated with the inlet 1231 of the heat exchange flow channel 123, and the outlet flow channel 132 is communicated with the outlet 1232 of the heat exchange flow channel 123. The flow directions of the heat exchange media in two adjacent battery cells 12 are opposite. The housing 120 includes a first wall 1211 and a second wall 1212 arranged adjacent to each other. The second wall 1212 is thermally connected to the thermal management component 13. The inlet 1231 and the outlet 1232 are arranged on the second wall 1212, and at least a part of the heat exchange flow channel 123 is formed on the first wall 1211.

[0244] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that, Comprising: A housing; An electrode assembly received within the housing; Wherein, a heat exchange flow path for accommodating a heat exchange medium is formed in the wall of the housing.

2. The battery cell according to claim 1, wherein The heat exchange flow path includes an inlet and an outlet, and the inlet and the outlet are provided on the same wall of the housing.

3. The battery cell according to claim 2, characterized in that, The housing includes a first wall and a second wall arranged adjacent to each other, at least a part of the heat exchange flow path is formed in the first wall, and the inlet and the outlet are provided on the second wall.

4. The battery cell according to claim 3, wherein The first wall is the wall with the largest area in the housing.

5. The battery cell according to claim 3, characterized in that, The first wall includes a first sub-wall and a second sub-wall, the first sub-wall and the second sub-wall are spaced apart along a first direction to form a first gap, the inlet and the outlet communicate with the first gap, and the first direction is parallel to the thickness direction of the first wall.

6. The battery cell according to claim 5, characterized in that, The housing further includes a third wall, the third wall is arranged opposite to the second wall along a second direction, the third wall, the second wall, the first sub-wall and the second sub-wall enclose a first cavity, the inlet and the outlet communicate with the first cavity, and the second direction is perpendicular to the first direction.

7. The battery cell according to claim 6, characterized in that, The first wall further includes a plurality of partition portions, the plurality of partition portions are spaced apart along a third direction, the partition portions divide the first cavity into a plurality of sub-cavities arranged along the third direction, two adjacent sub-cavities communicate with each other, and the inlet and the outlet respectively communicate with two sub-cavities located at both ends among the plurality of sub-cavities, and the first direction, the second direction and the third direction are perpendicular to each other in pairs.

8. The battery cell according to claim 7, characterized in that, The plurality of partition portions include first partition portions and second partition portions arranged alternately along the third direction, one end of the first partition portion is connected to the second wall, a second gap is formed between the other end of the first partition portion and the third wall, one end of the second partition portion is connected to the third wall, and a third gap is formed between the other end of the second partition portion and the second wall, the second gap communicates with two sub-cavities on both sides of the first partition portion, and the third gap communicates with two sub-cavities on both sides of the second partition portion.

9. The battery cell according to claim 8, wherein There are a plurality of the first partition portions, a plurality of first grooves are provided on the inner surface of the second wall, the plurality of first grooves are spaced apart along the third direction and correspond to the plurality of first partition portions one by one, and one end of the first partition portion is inserted into the first groove corresponding to it; There are a plurality of the second partition portions, a plurality of second grooves are provided on the inner surface of the third wall, the plurality of second grooves are spaced apart along the third direction and correspond to the plurality of second partition portions one by one, and one end of the second partition portion is inserted into the second groove corresponding to it.

10. The battery cell according to claim 3, characterized in that, The housing further includes a third wall, the third wall is arranged opposite to the second wall, and the battery cell further includes an electrode terminal, and the electrode terminal is provided on the third wall.

11. The battery cell according to claim 3, characterized in that, The housing further includes a third wall, the third wall is arranged opposite to the second wall, and the battery cell further includes a pressure relief mechanism, and the pressure relief mechanism is provided on the third wall.

12. The battery cell according to claim 10 or 11, characterized in that, The housing includes a housing body, a first end cover, and a second end cover. The housing body includes a first side wall and a second side wall that are oppositely arranged in a first direction, and a third side wall and a fourth side wall that are oppositely arranged in a third direction. The first side wall, the second side wall, the third side wall, and the fourth side wall enclose a receiving cavity having a first opening and a second opening. The first end cover closes the first opening, and the second end cover closes the second opening. The first end cover and the second end cover are oppositely arranged in a second direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs. The first side wall is the first wall, the first end cover is the second wall, and the second end cover is the third wall.

13. The battery cell according to claim 1, wherein The length of the battery cell is L, the width of the battery cell is W, and the thickness of the battery cell is H, satisfying: 4 ≤ L / W ≤ 12, 12 ≤ L / H ≤ 60.

14. A thermal management component for regulating the temperature of a battery cell, the battery cell having a heat exchange flow channel for accommodating a heat exchange medium, characterized in that, The thermal management component includes: A body provided with an independent liquid inlet channel and a liquid outlet channel. The liquid inlet channel is used to communicate with the inlet of the heat exchange channel, and the liquid outlet channel is used to communicate with the outlet of the heat exchange channel.

15. The thermal management component according to claim 14, characterized in that, The liquid inlet channel includes a liquid inlet and a plurality of first communication ports for communicating with the inlet of the heat exchange channel. The liquid outlet channel includes a liquid outlet and a plurality of second communication ports for communicating with the outlet of the heat exchange channel. The first communication ports and the second communication ports are in one-to-one correspondence. Each first communication port and its corresponding second communication port are spaced apart in the third direction. The plurality of first communication ports and the plurality of second communication ports are arranged in two rows, and the arrangement direction of each row of communication ports is the first direction, and the first direction is perpendicular to the third direction.

16. The thermal management component according to claim 15, characterized in that, The thermal management component further includes a plurality of plug-in parts protruding from the outer surface of the body. The plug-in parts are in one-to-one correspondence with the communication ports and are used for plugging into the inlet or outlet of the heat exchange channel.

17. The thermal management component according to claim 15, wherein, In each row of communication ports, the first communication ports and the second communication ports are alternately distributed in the first direction.

18. The thermal management component according to claim 17, wherein The liquid inlet channel includes two first diversion channels spaced apart in the third direction. Each first diversion channel is connected to a plurality of first branch channels. One end of the first branch channel is connected to the first diversion channel, and the first communication port is arranged at the other end of the first branch channel.

19. The thermal management component according to claim 18, characterized in that, The liquid inlet channel further includes a first main channel connecting the two first diversion channels, and the first main channel is connected to the liquid inlet.

20. The thermal management component according to claim 18, characterized in that, The liquid outlet channel includes two second diversion channels spaced apart in the third direction. Each second diversion channel is connected to a plurality of second branch channels. One end of the second branch channel is connected to the second diversion channel, and the second communication port is arranged at the other end of the second branch channel.

21. The thermal management component according to claim 20, wherein, The liquid outlet channel further includes a second main channel connecting the two second diversion channels, and the second main channel is connected to the liquid outlet.

22. The thermal management component according to claim 20, wherein, In the third direction, the two first flow channels are located between the two second flow channels, and each first branch channel extends from the first flow channel where it is located in a direction away from the other first flow channel; Each second branch channel extends from the second flow channel where it is located in a direction away from the other second flow channel; The first branch channels and the second branch channels are arranged alternately along the first direction.

23. The thermal management component according to claim 20, wherein In the third direction, the two second flow channels are located between the two first flow channels, and each second branch channel extends from the second flow channel where it is located in a direction away from the other second flow channel; Each first branch channel extends from the first flow channel where it is located in a direction away from the other first flow channel; The second branch channels and the first branch channels are arranged alternately along the first direction.

24. The thermal management component according to claim 15, characterized in that, The heat management component includes a first plate body and a second plate body arranged in a stacked manner. The second plate body has a third groove and a fourth groove on the side facing the first plate body. The first plate body covers the third groove to form the liquid inlet flow channel, and the first plate body covers the fourth groove to form the liquid outlet flow channel. The first communication port and the second communication port are arranged on the first plate body.

25. A battery, characterized in that, Comprising: A plurality of battery cells as described in any one of claims 1-13, and the plurality of battery cells are arranged along a first direction ； A heat management component as described in any one of claims 14-24, the heat management component being used to regulate the temperature of the battery cells, the liquid inlet flow channel being communicated with the inlet of the heat exchange flow channel, and the liquid outlet flow channel being communicated with the outlet of the heat exchange flow channel.

26. The battery according to claim 25, characterized in that, The flow directions of the heat exchange media in two adjacent battery cells are opposite.

27. The battery according to claim 25, wherein, The housing includes a first wall and a second wall arranged adjacent to each other. The second wall is thermally connected to the heat management component. The inlet and the outlet are arranged on the second wall, and at least a part of the heat exchange flow channel is formed on the first wall.

28. An electrical device, characterized in that, The electrical device includes a battery cell as described in any one of claims 1-13, and the battery cell is used to provide electrical energy; Or, the electrical device includes a battery as described in any one of claims 25-27, and the battery is used to provide electrical energy.

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