Shell, battery monomer, battery and electric device
By setting a phase change cooling member in the battery cell housing, the heat generation and explosion problems caused by poor heat dissipation of the battery cell are solved, and good heat dissipation effect and reliability are achieved.
Patent Information
- Application Number
- CN202420243108.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-01-31
AI Technical Summary
There are serious heating problems during use of the battery cell. If the heat dissipation effect of the shell is not ideal, it is easy to cause the battery cell to explode.
A shell is designed, including an independent cooling chamber and a receiving chamber. A phase change cooling member is provided in the cooling chamber. A phase change substance that can absorb heat from the shell is sealed in the phase change cooling member. It is directly arranged in the shell body without the use of cooling glue and other connecting media.
The phase change cooling element absorbs heat, effectively reduces the temperature of the battery cell, improves the heat dissipation reliability and heat dissipation effect of the battery cell, and avoids the risk of explosion caused by poor heat dissipation.
Smart Images
Figure CN222562762U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a housing, a battery cell, a battery and an electrical device. Background Art
[0002] Battery cells have serious heating problems during use. If the heat dissipation effect of the shell is not ideal, the air pressure inside the battery cell will be too high, which may easily cause the battery cell to explode.
[0003] In the related art, cooling structures such as cooling pipes and liquid cooling plates are used to cool the shell of the battery cell. In order to achieve effective connection between the cooling structure and the shell, cooling glue is usually used to bond the cooling structure to the shell. The cooling effect of the battery cell is affected by the connection reliability and thermal conductivity of the cooling glue. After long-term use, the heat dissipation effect of the battery cell is poor. Utility Model Content
[0004] Based on this, it is necessary to provide a housing, a battery cell, a battery and an electrical device to address the problem of poor heat dissipation of the battery cell after long-term use.
[0005] In a first aspect, an embodiment of the present application provides a housing, comprising:
[0006] The shell body has an independent cooling cavity and a receiving cavity, wherein the receiving cavity and the cooling cavity are both open at one end, and the receiving cavity is used to receive the electrode assembly; and
[0007] The phase-change cooling element is located in the cooling cavity, and a phase-change material capable of absorbing the heat of the shell body is sealed in the phase-change cooling element.
[0008] In some embodiments, it is characterized in that the phase change cooling is detachably disposed in the cooling cavity through the open end of the cooling cavity.
[0009] In some embodiments, it is characterized in that the outer contour of the phase-change cooling element can be adaptively fitted with the contour of the cavity wall of the cooling cavity.
[0010] In some embodiments, it is characterized in that a phase change material with a phase change temperature of 25°C-55°C is sealed in the phase change cooling element.
[0011] In some embodiments, the shell body includes an inner wall surface and an outer wall surface arranged around the inner wall surface, the inner wall surface forms a cavity wall of the accommodating cavity, and the cooling cavity is formed between the inner wall surface and the outer wall surface;
[0012] The cooling cavity and the accommodating cavity are both opened along the height direction of the shell.
[0013] In some embodiments, at least one end of the shell body in the height direction is recessed along the height direction to form a concave hole, and the concave hole serves as the cooling cavity.
[0014] In some embodiments, a step surface protrudes from one end of the cavity wall of the accommodating cavity close to the open end thereof, and the step is lower than the open end of the accommodating cavity.
[0015] In a second aspect, an embodiment of the present application provides a battery cell comprising:
[0016] A housing as described in any one of the above items;
[0017] an electrode assembly, accommodated in the housing cavity of the shell; and
[0018] The end cover is arranged on the shell body of the shell and covers the open end of the accommodating cavity.
[0019] In some embodiments, the open end of the accommodating cavity and the open end of the cooling cavity are located at the same end in the height direction of the shell;
[0020] Along the height direction of the shell, the orthographic projection of the end cover is staggered with the orthographic projection of the cooling cavity.
[0021] In a third aspect, an embodiment of the present application provides a battery, comprising the battery cell as described above.
[0022] In a fourth aspect, an embodiment of the present application provides an electrical device, comprising the battery described above, wherein the battery is used to provide electrical energy.
[0023] The housing, battery cell, battery and electrical device described above, the housing cavity on the housing body can be used to accommodate the electrode assembly, and the cooling cavity on the housing body is provided with a phase change cooling element, which can absorb the heat of the battery cell when the temperature of the battery cell rises. Moreover, since the phase change cooling element is directly provided in the housing body, there is no need to use a connecting medium such as cooling glue, and there is basically no need to worry about the phase change cooling element being separated from the housing body during long-term use, and the heat dissipation reliability and heat dissipation effect of the battery cell during long-term use are good. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:
[0025] Figure 1 Schematic diagram of the appearance of a battery cell according to some embodiments of the present application.
[0026] Figure 2 for Figure 1 An exploded schematic diagram of the battery cell.
[0027] Figure 3 for Figure 1 A schematic structural diagram of the shell body of the battery cell shown.
[0028] The reference numerals in the specific implementation manner are as follows:
[0029] 10. Battery cell; 11. Shell; 11a. Shell body; a1. Inner wall surface; a2. Outer wall surface; 11b. Phase change cooling element; Q1. Accommodating cavity; Q2. Cooling cavity; q. Concave hole; t. Step surface; 12. End cover; 13. Pole; 14. Liquid injection hole; 15. Explosion-proof structure; Z. Height direction. DETAILED DESCRIPTION
[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0031] In the description of the present application, it should be understood that terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships, if any, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0032] In addition, if present, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0033] In this application, unless otherwise clearly specified and limited, if any, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0034] In the present application, if it appears, unless otherwise clearly specified and limited, a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature “above”, “above” and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature “below”, “below” and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0035] It should be noted that, if present, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0036] The embodiment of the present application provides a shell to solve the problem that the cooling and heat dissipation effect of the battery cell is poor after long-term use when the battery cell shell is connected to the cooling structure such as the cooling pipe or the liquid cooling plate by cooling glue in the related art. The shell has its own phase change cooling element, and absorbs the heat of the shell when the phase change cooling element undergoes phase change to reduce the temperature of the battery cell. It does not need to rely on the connection medium such as cooling glue, and the cooling and heat dissipation reliability of the battery cell is good. Even if the battery cell is used for a long time, it still has a good heat dissipation effect.
[0037] The housing 11 provided in the embodiment of the present application can be used to prepare a battery cell 10 . Figure 1 Schematic diagram of the appearance of a battery cell 10 according to some embodiments of the present application. Figure 1In some embodiments, the battery cell 10 includes a shell 11, an end cap 12 and an electrode assembly (not shown). The shell 11 and the end cap 12 cooperate to form an internal space of the battery cell 10, and the electrode assembly is contained in the internal space. The electrode assembly is a unit for electrochemical reaction in the battery cell 10, and usually includes a positive electrode sheet, a negative electrode sheet and a separator. The separator is arranged between the positive electrode sheet and the negative electrode sheet, plays the role of insulating and isolating the positive electrode sheet and the negative electrode sheet, and can allow ions to pass through itself. The separator can be a diaphragm. The electrode assembly can be a winding type or a laminated type. Generally, a pole 13, an explosion-proof structure 15, an injection hole 14, etc. can be arranged on the end cap 12. The pole 13 is electrically connected to the electrode assembly for connecting to an external circuit. The explosion-proof structure 15 can break and release pressure when the internal air pressure of the battery cell 10 exceeds a threshold value. It can be an explosion-proof valve, a thinning notch, etc. The injection hole 14 is used to inject electrolyte into the battery cell 10.
[0038] A battery can be prepared using the battery cells of the embodiments of the present application. Generally, the battery may also include a housing, in which a plurality of battery cells are arranged side by side. The battery in the embodiments of the present application may be applied to an electrical device to provide electrical energy for the electrical device. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, and the like. Taking the electrical device as a vehicle as an example, the battery may be arranged at the rear, head, or bottom of the vehicle, and the battery may provide electrical energy for the drive of the vehicle, and may also provide electrical energy for the control system of the vehicle.
[0039] The housing 11 in the embodiment of the present application is described in detail below.
[0040] Figure 2 for Figure 1 An exploded schematic diagram of the battery cell 10 is shown. Figure 3 for Figure 1 The schematic structural diagram of the shell body 11a of the battery cell 10 is shown.
[0041] According to some embodiments of the present application, referring to Figures 1 to 3 The shell 11 provided in the embodiment of the present application includes a shell body 11a and a phase-change cooling member 11b. The shell body 11a has an independent cooling cavity Q2 and a receiving cavity Q1. The receiving cavity Q1 and the cooling cavity Q2 are both open at one end, and the receiving cavity Q1 is used to accommodate the electrode assembly. The phase-change cooling member 11b is located in the cooling cavity Q2, and a phase-change material capable of absorbing the heat of the shell body 11a is sealed in the phase-change cooling member 11b.
[0042] The shell body 11a is usually made of a heat-conducting material, such as aluminum, copper, etc. The shell body 11a is formed with a receiving cavity Q1 capable of receiving the electrode assembly, and one end of the receiving cavity Q1 is open to facilitate the entry and exit of the electrode assembly. The shell body 11a is also formed with a cooling cavity Q2 capable of receiving the phase-change cooling element 11b, and one end of the cooling cavity Q2 is open to facilitate the installation of the phase-change cooling element 11b.
[0043] The cooling chamber Q2 is independent of the containing chamber Q1 and is not connected. In actual application, the containing chamber Q1 can be filled with electrolyte to support the electrode assembly for electrochemical reaction, and the electrolyte in the containing chamber Q1 cannot enter the cooling chamber Q2. The cooling chamber Q2 and the containing chamber Q1 are both open at one end, and the open ends of the two can be located at the same end of the shell 11, or at different ends of the shell 11. The "different ends" can be opposite ends or adjacent ends.
[0044] The phase-change material is sealed in the phase-change cooling member 11b, that is, the phase-change material is enclosed in the phase-change cooling member 11b and cannot flow out of the phase-change cooling member 11b. It can be understood that the phase-change cooling member 11b has a packaging portion and a phase-change material arranged in the packaging portion. When located in the cooling cavity Q2, the packaging portion is sealed. The packaging portion can be a packaging capsule, a packaging shell, a packaging film, etc.
[0045] The phase change material can be a phase change material that is liquid or solid at room temperature. When the temperature inside the battery cell 10 reaches the phase change temperature of the phase change material, the phase change material can absorb heat and undergo a phase change. If the phase change material is liquid at room temperature, it can change to a gaseous state after absorbing heat. If the phase change material is solid at room temperature, it can change to a liquid state after absorbing heat. The specific selection of the phase change material is not limited in the embodiments of the present application, as long as it can absorb the temperature of the battery cell 10 when the temperature inside the battery cell 10 is high. Specifically, a phase change material with a phase change temperature between 25°C and 70°C can be selected, including wax phase change materials (such as paraffin), polymer phase change materials, etc.
[0046] When the shell 11 is applied to the battery cell 10, the accommodation cavity Q1 on the shell body 11a can be used to accommodate the electrode assembly, and the cooling cavity Q2 on the shell body 11a is provided with a phase-change cooling member 11b, which can absorb the heat of the battery cell 10 when the temperature of the battery cell 10 rises. Moreover, since the phase-change cooling member 11b is directly provided in the shell body 11a, there is no need to use a connecting medium such as cooling glue, and there is basically no need to worry about the phase-change cooling member 11b being separated from the shell body 11a during long-term use, and the heat dissipation reliability and heat dissipation effect of the battery cell 10 during long-term use are good.
[0047] In some embodiments, the phase-change cooling member 11b is detachably disposed in the cooling cavity Q2 through the open end of the cooling cavity Q2. Specifically, the phase-change cooling member 11b can be detachably inserted into the cooling cavity Q2 along the depth direction of the cooling cavity Q2. Alternatively, the outer surface of the phase-change cooling member 11b is provided with an external thread, and the inner surface of the cooling cavity Q2 is provided with an internal thread, and the phase-change cooling member 11b is detachably connected to the cooling member through the cooperation of the internal and external threads. The specific method of detachable connection between the two can be flexibly set by those skilled in the art.
[0048] At this time, the phase change cooling element 11b is detachably connected to the cooling chamber Q2, which not only facilitates the maintenance and replacement of the phase change cooling element 11b, but also facilitates the recycling of the phase change cooling element 11b, and will not damage the shell body 11a when the phase change cooling element 11b is recycled.
[0049] In some embodiments, the outer contour of the phase-change cooling element 11 b fits adaptively with the contour of the cavity wall of the cooling cavity Q2 .
[0050] The outer contour of the phase-change cooling element 11b is adapted to the contour of the cavity wall of the cooling cavity Q2. When the phase-change cooling element 11b is inserted into the cooling cavity Q2, the cavity wall of the cooling cavity Q2 can match and fit the outer contour of the phase-change cooling element 11b. The contact area between the phase-change cooling element 11b and the cooling cavity Q2 is large, and the thermal conductivity efficiency is high, which can improve the heat dissipation efficiency and heat dissipation effect of the battery cell.
[0051] Specifically, the phase-change cooling element 11b and the cooling cavity Q2 may both be roughly in the shape of a cuboid, a cylinder, or the like.
[0052] In some embodiments, a phase change material with a phase change temperature of 25°C-55° is sealed in the phase change cooling member 11b. The material with a phase change temperature of 25°C-55°, such as paraffin, is not limited in its specific composition, and there are many conventional options for those skilled in the art. For conventional battery cells 10, their normal operating temperature is at room temperature. The use of a phase change material with a temperature of 25°C-55° can timely cool down the battery cells 10 when the internal temperature of the battery cells 10 does not rise too much. The negative impact of the temperature rise on the performance of the battery cells 10 is small, which helps to improve the performance stability of the battery cells 10.
[0053] In some embodiments, reference Figure 3 The shell body 11a includes an inner wall surface a1 and an outer wall surface a2 arranged around the inner wall surface a1. The inner wall surface a1 forms the cavity wall of the accommodating cavity Q1, and a cooling cavity Q2 is formed between the inner wall surface a1 and the outer wall surface a2. The cooling cavity Q2 and the accommodating cavity Q1 are both opened along the height direction Z of the shell 11.
[0054] The inner wall surface a1 encloses the accommodating cavity Q1 to form the cavity wall of the accommodating cavity Q1, and the outer wall surface a2 forms the outer surface of the shell body 11a. A plurality of cooling cavities Q2 can be configured, and all cooling cavities Q2 are arranged at intervals around the inner wall surface a1, and a phase change cooling element 11b is independently arranged in each cooling cavity Q2. Only one cooling cavity Q2 can also be configured, and the cooling cavity Q2 can be continuously arranged around the inner wall surface a1, or can be arranged on one side of the shell 11.
[0055] The height direction Z of the shell 11 usually corresponds to its longitudinal direction, or the height direction Z of the shell 11 is defined by the opening direction of the accommodating chamber Q1. The cooling chamber Q2 and the accommodating chamber Q1 are both open along the height direction Z of the shell 11, and the open end of the cooling chamber Q2 and the open end of the accommodating chamber Q1 can be at the same end of the shell 11, or at opposite ends of the shell 11, or the open end of part of the cooling chamber Q2 and the open end of the accommodating chamber Q1 can be located at the same end of the shell 11, and the open end of part of the cooling chamber Q2 and the open end of the accommodating chamber Q1 can be located at different ends of the shell 11. In actual application, the height direction Z of the shell 11 corresponds to the gravity direction, and the open end of the accommodating chamber Q1 and the open end of the cooling chamber Q2 are both located at the top thereof, or the open end of the accommodating chamber Q1 is located at the top of the shell 11, and the open end of the cooling chamber Q2 is located at the bottom thereof.
[0056] At this time, the accommodating chamber Q1 is located in the middle of the shell 11 to accommodate the electrode assembly, and the cooling chamber Q2 is located around the shell 11 to accommodate the phase change cooling element 11b, which is more in line with the conventional battery layout and can reduce the improvement cost.
[0057] There are many ways to form the cooling cavity Q2 in the shell body 11a. For example, the shell body 11a includes an inner shell and an outer shell, the outer shell surrounds the inner shell, and a cavity is formed between the inner shell and the outer shell. The cavity can be directly used as the cooling cavity Q2 or the cavity can be divided into multiple cooling cavities Q2 by arranging partition bars in the cavity. Of course, the following method can also be adopted.
[0058] In some embodiments, reference Figure 3 At least one end of the shell body 11a in the height direction Z is recessed along the height direction Z to form a recessed hole q, and the recessed hole q is configured as a cooling cavity Q2. At this time, at least part of the cooling cavity Q2 can be regarded as being formed by the recessed hole q obtained by digging out a part of the shell wall of the thin shell enclosing the accommodating cavity Q1. In this way, the shell body 11a is simple to form, which can reduce the production cost.
[0059] In some embodiments, reference Figure 3A step surface t protrudes from one end of the cavity wall of the accommodating cavity Q1 near its open end, and the step surface t is lower than the open end of the accommodating cavity Q1. Generally, the distance between the step surface t and the open end of the accommodating cavity Q1 is adapted to the thickness of the end cover 12. The step surface t protrudes relative to the cavity wall of the accommodating cavity Q1, and the step surface t can be seen from the open end of the accommodating cavity Q1.
[0060] In actual application, when the end cover 12 covers the open end of the accommodating cavity Q1, the end cover 12 is supported and limited on the step surface t, and the step surface t can perform initial positioning on the end cover 12 to facilitate subsequent welding of the end cover 12 and the shell body 11a.
[0061] In addition, the present application also provides a battery cell 10, including the shell 11, the electrode assembly and the end cover 12 in any of the above embodiments, the electrode assembly is accommodated in the accommodation cavity Q1 of the shell 11, and the end cover 12 is arranged on the shell body 11a of the shell 11, and covers the open end of the accommodation cavity Q1. The end cover 12 and the shell body 11a can be but not limited to welded, and the specific structure of the end cover 12 can refer to the conventional setting.
[0062] The battery cell 10 has a phase change cooling element 11b on its housing 11, which can cool the battery cell 10 when the internal temperature of the battery cell 10 increases, thereby reducing the risk of thermal runaway of the battery cell 10. Moreover, the battery cell 10 has the beneficial effects such as reliable heat dissipation as described in the above embodiments.
[0063] In some embodiments, the open end of the accommodating cavity Q1 and the open end of the cooling cavity Q2 are located at the same end of the housing 11 in the height direction Z. Along the height direction Z of the housing 11, the orthographic projection of the end cover 12 is staggered from the orthographic projection of the cooling cavity Q2.
[0064] Preferably, the open ends of both the accommodating chamber Q1 and the cooling chamber Q2 are located at the top end of the shell 11, and the end cover 12 covers the open end of the accommodating chamber Q1 without closing the open end of the cooling chamber Q2, thereby facilitating the disassembly and assembly of the phase change cooling element 11b in the cooling chamber Q2 when the battery cell 10 is disassembled.
[0065] In addition, an embodiment of the present application further provides a battery, comprising the above-mentioned battery cell 10 .
[0066] In addition, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery, and the battery is used to provide electrical energy.
[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0068] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.
Claims
1. A housing (11), characterized in that: include: The shell body (11a) has an independent cooling cavity (Q2) and a receiving cavity (Q1), wherein the receiving cavity (Q1) and the cooling cavity (Q2) are both open at one end, and the receiving cavity (Q1) is used to receive the electrode assembly; and A phase-change cooling element (11b) is located in the cooling cavity (Q2), and a phase-change material capable of absorbing heat from the shell body (11a) is sealed in the phase-change cooling element (11b).
2. The housing (11) according to claim 1, characterized in that The phase-change cooling element (11b) is detachably disposed in the cooling cavity (Q2) through the open end of the cooling cavity (Q2).
3. The housing (11) according to claim 1, characterized in that The outer contour of the phase-change cooling element (11b) can be adaptively fitted with the contour of the cavity wall of the cooling cavity (Q2).
4. The housing (11) according to claim 2, characterized in that The phase-change cooling element (11b) is sealed with a phase-change material having a phase-change temperature of 25°C-55°C.
5. The housing (11) according to claim 1, characterized in that The shell body (11a) comprises an inner wall surface (a1) and an outer wall surface (a2) arranged around the inner wall surface (a1), the inner wall surface (a1) forms the cavity wall of the accommodating cavity (Q1), and the cooling cavity (Q2) is formed between the inner wall surface (a1) and the outer wall surface (a2); The cooling chamber (Q2) and the accommodating chamber (Q1) are both openly arranged along the height direction (Z) of the shell (11).
6. The housing (11) according to claim 5, characterized in that At least one end of the shell body (11a) in the height direction (Z) is recessed along the height direction (Z) to form a concave hole (q), and the concave hole (q) serves as the cooling cavity (Q2).
7. The housing (11) according to claim 1, characterized in that A step surface (t) protrudes from one end of the cavity wall of the accommodating cavity (Q1) close to the open end thereof, and the step surface (t) is lower than the open end of the accommodating cavity (Q1).
8. A battery cell (10), characterized in that: include: The housing (11) according to any one of claims 1 to 7; An electrode assembly, accommodated in the accommodation cavity (Q1) of the housing (11); and An end cover (12) is arranged on the shell body (11a) of the shell (11) and covers the open end of the accommodating cavity (Q1).
9. The battery cell (10) according to claim 8, characterized in that: The open end of the accommodating cavity (Q1) and the open end of the cooling cavity (Q2) are located at the same end in the height direction (Z) of the shell (11); Along the height direction (Z) of the shell (11), the orthographic projection of the end cover (12) is offset from the orthographic projection of the cooling cavity (Q2).
10. A battery, characterized in that: Comprising the battery cell (10) as claimed in claim 8 or 9.
11. An electrical device, characterized in that: Comprising the battery of claim 10, the battery is used to provide electrical energy.