Battery cell capable of automatically adjusting temperature, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery cell capable of automatically adjusting temperature, a battery pack and electric equipment, and the battery cell comprises a naked battery cell which comprises an electrode assembly and a heating assembly, the heating assembly is connected with the electrode assembly, and a part of structure of the heating assembly is exposed out of the electrode assembly; the battery shell is provided with a containing cavity, the containing cavity is configured to be used for containing the electrode assembly and the heating assembly, and the part, exposed out of the electrode assembly, of the heating assembly extends to the outer side of the battery shell. The heating assembly is connected with the electrode assembly to form a whole and is accommodated in the accommodating cavity of the battery shell, so that when the heating assembly is powered on, the electrode assembly can be heated, the heating rate is controlled according to the magnitude of current, the overall efficiency is high, and the heating rate is high.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a battery pack and an electrical device with self-regulating temperature. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, 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 advantages are an important factor in their development.

[0003] In related technologies, when the battery is in a low temperature environment, the battery system of the electric vehicle needs to heat the battery cell to a charging temperature before starting charging. The current main method is to use cooling water in the integrated cold plate in the lower shell of the battery system to heat the bottom of the battery cell. This heating method is slow, inefficient, and the actual temperature inside the battery cell is unknown. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery cell, a battery pack and an electrical device with self-regulating temperature, which can heat the battery cell and control the heating rate by electric current, with high efficiency and fast heating rate.

[0005] In a first aspect, an embodiment of the present application provides a self-regulating temperature battery cell, comprising: a bare battery cell, comprising an electrode assembly and a heating assembly, wherein the heating assembly is connected to the electrode assembly, and a portion of the structure of the heating assembly is exposed outside the electrode assembly; a battery shell, provided with a accommodating cavity, wherein the accommodating cavity is configured to accommodate the electrode assembly and the heating assembly, and the portion of the structure of the heating assembly exposed outside the electrode assembly extends to the outside of the battery shell.

[0006] In the above implementation process, the heating component is connected to the electrode assembly to form a whole, and is accommodated in the accommodating cavity of the battery shell, so that when the heating component is connected to the power supply, it can heat the electrode assembly and control the heating rate by the magnitude of the current. The overall efficiency is high and the heating rate is fast.

[0007] In some embodiments, the heating assembly includes a heating film and a heating element, the heating element is connected to the heating film, and a portion of the heating element extends to the outside of the battery housing. By connecting the heating element to the heating film, when the heating assembly is connected to the electrode assembly, the heating film can insulate the heating element, and the electrode assembly is heated by the heating element, thereby increasing the heating rate.

[0008] In some embodiments, the heating assembly further includes a temperature sensor, and the temperature sensor is disposed inside the electrode assembly. During the heating process of the heating element, the temperature of the electrode assembly can be measured by the temperature sensor, thereby more accurately controlling the temperature of the battery cell.

[0009] In some embodiments, the heating film comprises an insulating plastic film.

[0010] In some embodiments, the thickness of the heating film is 0.08-1 mm.

[0011] In some embodiments, the heating element includes a heating resistor wire and a heating wire, and the heating wire is connected to the heating resistor wire.

[0012] In some embodiments, the heating resistance wire comprises a metal material.

[0013] In some embodiments, the self-regulating temperature battery cell also includes a pole, which is configured at one end of the battery shell, the pole is connected to the bare battery cell, and the structure in which the heating component extends to the outside of the battery shell is located on the same side of the battery shell as the pole.

[0014] In a second aspect, the present application also provides a battery pack, comprising a self-temperature regulating battery cell as described in any of the above items.

[0015] Since the second embodiment of the present application provides a battery pack, which includes the self-temperature-regulating battery cell described in the technical solution of the first aspect, it has all the technical effects of the above embodiments and will not be repeated here.

[0016] In a third aspect, the present application also provides an electrical device, comprising the battery pack as described above.

[0017] Since the electrical equipment provided in the third embodiment of the present application includes the battery pack described in the second technical solution, it has all the technical effects of the above embodiments and will not be repeated here.

[0018] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A front view of a battery cell with self-regulating temperature provided in an embodiment of the present application;

[0022] Figure 2 A side view of a battery cell with self-regulating temperature is provided for an embodiment of the present application.

[0023] Reference numerals

[0024] 100, electrode assembly; 200, heating assembly; 201, heating element; 300, battery casing; 400, pole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0028] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0030] Example

[0031] In the present application, the self-temperature regulating battery cell abandons the traditional mylar film wrapped inside the battery cell, and directly uses the internal core of the battery cell to wrap the heating component. The heating component is also equipped with a temperature sensor to measure the temperature of the battery cell, and the heating component is connected to the outside of the battery cell through a heating wire.

[0032] like Figure 1-Figure 2 As shown, in the first aspect, an embodiment of the present application provides a self-regulating temperature battery cell, comprising: a bare battery cell, comprising an electrode assembly 100 and a heating assembly 200, wherein the heating assembly 200 is connected to the electrode assembly 100, and a portion of the structure of the heating assembly 200 is exposed outside the electrode assembly 100; a battery shell 300, which is provided with a accommodating cavity, wherein the accommodating cavity is configured to accommodate the electrode assembly 100 and the heating assembly 200, and the portion of the structure of the heating assembly 200 exposed outside the electrode assembly 100 extends to the outside of the battery shell 300.

[0033] Exemplarily, the electrode assembly 100 is composed of a positive electrode sheet and a negative electrode sheet. The self-regulating temperature battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, the positive active material layer is coated on the surface of the positive current collector, the current collector not coated with the positive active material layer protrudes from the current collector coated with the positive active material layer, and the current collector not coated with the positive active material layer serves as the positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive current collector may be aluminum, and the positive active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer is coated on the surface of the negative current collector, the current collector not coated with the negative active material layer protrudes from the current collector coated with the negative active material layer, and the current collector not coated with the negative active material layer serves as the negative electrode ear. The material of the negative current collector may be copper, and the negative active material may be carbon or silicon, etc. In order to ensure that a large current can pass without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0034] In the above implementation process, the heating component 200 is connected to the electrode assembly 100 to form a whole, and is accommodated in the accommodating cavity of the battery shell 300, so that when the heating component 200 is powered on, it can heat the electrode assembly 100 and control the heating rate by the magnitude of the current. The overall efficiency is high and the heating rate is fast.

[0035] In some embodiments, the heating assembly 200 includes a heating film and a heating element 201, wherein the heating element 201 is connected to the heating film, and a portion of the structure of the heating element 201 extends to the outside of the battery housing 300. By connecting the heating element 201 to the heating film, when the heating assembly 200 is connected to the electrode assembly 100, the heating film can insulate the heating element 201, and the electrode assembly 100 is heated by the heating element 201, thereby increasing the heating rate.

[0036] In some embodiments, the heating assembly 200 further includes a temperature sensor, and the temperature sensor is disposed inside the electrode assembly 100. During the heating process of the heating element 201, the temperature of the electrode assembly 100 can be measured by the temperature sensor, thereby more accurately controlling the temperature of the battery cell.

[0037] In some embodiments, the heating film comprises an insulating plastic film, and the insulating plastic film comprises PI, PET, etc.

[0038] In some embodiments, the thickness of the heating film is 0.08-1 mm. In the present application, the thickness of the heating film is preferably 0.1-0.6 mm.

[0039] In some embodiments, the heating element 201 includes a heating resistor wire and a heating wire, and the heating wire is connected to the heating resistor wire.

[0040] In some embodiments, the heating resistance wire includes a metal material, such as Cu, Al, etc.

[0041] In some embodiments, the self-regulating temperature battery cell also includes an electrode 400, which is disposed at one end of the battery shell 300, and the electrode 400 is connected to the bare battery cell to form a positive and negative pole, and the structure in which the heating component 200 extends to the outside of the battery shell 300 is located on the same side of the battery shell 300 as the electrode 400.

[0042] In the second aspect, the present application also provides a battery pack, including a self-regulating temperature battery cell as described above. The battery pack may also include a plurality of self-regulating temperature batteries or battery modules. In the battery module, there may be multiple self-regulating temperature batteries, and multiple self-regulating temperature batteries may be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple self-regulating temperature batteries are both connected in series and in parallel. Multiple self-regulating temperature batteries can be directly connected in series, in parallel, or in mixed connection, and then the planar structure of multiple self-regulating temperature batteries is bonded to the water cooling plate; of course, the self-regulating temperature battery cell may also be a form in which multiple self-regulating temperature batteries are first connected in series, in parallel, or in mixed connection to form a battery module, and multiple battery modules are then connected in series, in parallel, or in mixed connection to form a battery pack. The battery module may also include other structures. For example, the battery module may also include a confluence component for realizing electrical connection between multiple self-regulating temperature batteries. Among them, each self-regulating temperature battery cell may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.

[0043] Since the second embodiment of the present application provides a battery pack, which includes the self-temperature-regulating battery cell described in the technical solution of the first aspect, it has all the technical effects of the above embodiments and will not be repeated here.

[0044] In a third aspect, the present application also provides an electrical device, comprising the battery pack as described above.

[0045] The electrical equipment may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; the electric tools may include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0046] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0047] The interior of the vehicle is provided with a battery pack, which can be arranged at the bottom, head or tail of the vehicle. The battery pack can be used for power supply of the vehicle, for example, the battery pack can be used as an operating power source of the vehicle.

[0048] The vehicle may also include a controller and a motor, wherein the controller is used to control the battery pack to provide power to the motor, for example, for starting, navigating, and operating power requirements of the vehicle during driving.

[0049] In some embodiments of the present application, the battery pack can not only serve as the operating power source of the vehicle, but also serve as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0050] Since the electrical equipment provided in the third embodiment of the present application includes the battery pack described in the second technical solution, it has all the technical effects of the above embodiments and will not be repeated here.

[0051] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0052] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0053] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0054] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A self-temperature regulating battery cell, characterized in that: include: A bare cell, comprising an electrode assembly and a heating assembly, wherein the heating assembly is connected to the electrode assembly, and a portion of the heating assembly is exposed outside the electrode assembly; A battery housing is provided with a receiving cavity, wherein the receiving cavity is configured to receive the electrode assembly and the heating assembly, and a portion of the heating assembly exposed from the electrode assembly extends to the outside of the battery housing; Wherein, the heating assembly includes a heating film and a heating element, the heating element is connected to the heating film, and a part of the structure of the heating element extends to the outside of the battery housing.

2. The self-temperature regulating battery cell according to claim 1, characterized in that: The heating component also includes a temperature sensor, and the temperature sensor is configured inside the electrode component.

3. The self-temperature regulating battery cell according to claim 1, characterized in that: The heating film comprises an insulating plastic film.

4. The self-temperature regulating battery cell according to claim 1, characterized in that: The thickness of the heating film is 0.08-1 mm.

5. The self-temperature regulating battery cell according to claim 1, characterized in that: The heating element comprises a heating resistance wire and a heating wire, and the heating wire is connected to the heating resistance wire.

6. The self-temperature regulating battery cell according to claim 5, characterized in that: The heating resistance wire comprises metal material.

7. The self-temperature regulating battery cell according to claim 1, characterized in that: The self-temperature regulating battery cell also includes a pole, which is arranged at one end of the battery shell, the pole is connected to the bare battery cell, and the structure in which the heating component extends to the outside of the battery shell is located on the same side of the battery shell as the pole.

8. A battery pack, characterized in that: A battery cell comprising the self-temperature regulating battery cell as described in any one of claims 1 to 7.

9. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 8.

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