Battery monomer, battery pack and electric equipment
By designing a thinner battery case and using a clamping structure, the safety problems of the battery under vibration and high voltage conditions are solved, and higher safety and energy density are achieved.
Patent Information
- Application Number
- CN202420843438.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-22
AI Technical Summary
While the existing battery technology improves the energy density, it is difficult to ensure the safety of the battery, especially under vibration and high pressure conditions.
A battery cell is designed, adopting a thinner battery case, and the stability of the battery case is enhanced by the clamping structure of the positive electrode and the negative electrode assembly. At the same time, by configuring the positive electrode and negative electrode structures, the anti-rotation effect is achieved and safety is ensured through the insulating mechanism.
It improves the safety of the battery cell, prevents the battery case from stretching and loosening during vibration, and enhances the overall safety performance of the battery.
Smart Images
Figure CN222801934U_ABST
Abstract
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. 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] In the development of battery technology, in addition to improving the energy density of batteries, the safety of batteries is also an issue that cannot be ignored. Therefore, how to improve the safety of batteries is a technical problem that needs to be solved urgently in battery technology. 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, wherein the battery cell has high safety.
[0005] In the first aspect, an embodiment of the present application provides a battery cell, including: a battery shell, which is provided with a accommodating cavity, the accommodating cavity is configured to accommodate a bare battery cell, the bare battery cell is provided with a positive electrode ear and a negative electrode ear; a positive electrode assembly, including a positive electrode structure, a positive electrode upper pressure plate and a positive electrode lower pressure plate, the positive electrode upper pressure plate is connected to the upper end of the positive electrode structure, the positive electrode upper pressure plate is exposed from the battery shell, the positive electrode lower pressure plate is connected to the lower end of the positive electrode structure, and the positive electrode structure is connected to the positive electrode ear; a negative electrode assembly, including a negative electrode structure, a negative electrode upper pressure plate and a negative electrode lower pressure plate, the negative electrode upper pressure plate is exposed from the battery shell, the negative electrode upper pressure plate is connected to the upper end of the negative electrode structure, the negative electrode lower pressure plate is connected to the lower end of the negative electrode structure, and the negative electrode structure is connected to the negative electrode ear.
[0006] In the above-mentioned implementation process, the battery shell is respectively connected with a positive electrode assembly and a negative electrode assembly, the positive electrode assembly includes a positive electrode upper pressure plate and a positive electrode lower pressure plate, when the positive electrode upper pressure plate and the positive electrode lower pressure plate are respectively connected to the positive electrode structure, they can be clamped to the battery shell, the negative electrode assembly includes a negative electrode upper pressure plate and a negative electrode lower pressure plate, when the negative electrode upper pressure plate and the negative electrode lower pressure plate are respectively connected to the negative electrode structure, they can be clamped to the battery shell, so that in order not to affect the battery energy density, when the battery shell adopts a thinner material, the positive electrode upper pressure plate, the positive electrode lower pressure plate, the negative electrode upper pressure plate and the negative electrode lower pressure plate can all play a reinforcing role, when the positive electrode structure and the positive electrode structure are in vibration, the battery shell will not be stretched and loosened, thereby improving the safety of the battery cell.
[0007] In some embodiments, the positive electrode structure and / or the negative electrode structure are configured with two at intervals. By configuring the positive electrode structure and / or the negative electrode structure as two, when the battery shell is made of a thinner material, the battery shell does not need additional grooves to prevent rotation, and the two positive electrode structures restrain each other to achieve the effect of anti-rotation, and the two negative electrode structures restrain each other to achieve the effect of anti-rotation.
[0008] In some embodiments, the positive electrode structure includes a positive electrode column, a positive electrode sealing ring and a positive electrode insulating mechanism, the positive electrode sealing ring is sleeved on the positive electrode column, the positive electrode insulating mechanism is connected to the positive electrode column, and the positive electrode insulating mechanism is located between the positive electrode upper pressure plate and the positive electrode lower pressure plate.
[0009] In the above implementation process, the positive electrode column is passed through the battery casing through the positive electrode sealing ring, and the positive electrode upper pressure plate and the positive electrode lower pressure plate are both insulated and contacted with the battery casing through the positive electrode insulation mechanism, meeting the safety requirements.
[0010] In some embodiments, the positive electrode insulation mechanism includes a positive electrode upper insulation member and a positive electrode lower insulation member, wherein the positive electrode upper insulation member is disposed between the positive electrode upper pressure plate and the battery housing, and the positive electrode lower insulation member is disposed in the accommodating cavity. The positive electrode upper insulation member can ensure the insulation between the positive electrode upper pressure plate and the battery housing, and the positive electrode lower insulation member can ensure the insulation between the positive electrode lower pressure plate and the battery housing, thereby meeting safety requirements.
[0011] In some embodiments, the negative electrode structure includes a negative electrode column, a negative electrode sealing ring and a negative electrode insulating mechanism, the negative electrode sealing ring is sleeved on the negative electrode column, the negative electrode insulating mechanism is connected to the negative electrode column, and the negative electrode insulating mechanism is located between the negative electrode upper pressure plate and the negative electrode lower pressure plate.
[0012] In the above implementation process, the negative electrode column is passed through the battery casing through the negative electrode sealing ring, and the negative electrode upper pressure plate and the negative electrode lower pressure plate are both insulated and contacted with the battery casing through the negative electrode insulation mechanism, meeting the safety requirements.
[0013] In some embodiments, the negative electrode insulation mechanism includes a negative electrode upper insulation member and a negative electrode lower insulation member, wherein the negative electrode upper insulation member is disposed between the negative electrode upper pressure plate and the battery housing, and the negative electrode lower insulation member is disposed in the accommodating cavity. The negative electrode upper insulation member can ensure the insulation between the negative electrode upper pressure plate and the battery housing, and the negative electrode lower insulation member can ensure the insulation between the negative electrode lower pressure plate and the battery housing, thereby meeting safety requirements.
[0014] In some embodiments, the battery cell further includes an explosion-proof valve, the explosion-proof valve is connected to the battery casing, and the explosion-proof valve is located on a side of the battery casing away from the positive electrode assembly.
[0015] In the above-mentioned implementation process, by arranging the positive electrode assembly and the explosion-proof valve on different sides of the battery casing, when the battery pack is actually assembled, the pressure relief materials of the battery cells are uniformly sprayed downward, which facilitates the design of a pressure relief channel at the bottom of the battery pack for converging the pressure relief materials so as to discharge the pressure relief materials to the outside of the battery pack. It can also avoid the thermal runaway eruption of the battery cells affecting the passenger compartment, thereby improving the safety performance of electrical equipment.
[0016] In some embodiments, the battery shell is configured with a first side surface and a second side surface, the second side surface is adjacent to the first side surface, the area of the first side surface is smaller than the area of the second side surface, the first side surface is configured with the positive electrode assembly and / or the negative electrode assembly, and the second side surface is configured to allow the bare battery cell to enter the shell from this side into the accommodating cavity.
[0017] In the above implementation process, the first side is used to install the positive electrode assembly and / or the negative electrode assembly, the second side is used to put the bare battery cell into the shell, and the area of the second side is larger than the area of the first side, so that the battery group margin can be no less than 100%, so that the battery shell will not be deformed and cracked.
[0018] In some embodiments, the battery case includes a case member and a side plate, one side of the case member is provided with a flange, and the side plate is connected to the flange. By connecting the side plate to the flange of the case member, not only can the bare battery cell be inserted into the case from the side plate, but it is also convenient to connect the bare battery cell to the case member after the bare battery cell is inserted into the case, so as to achieve a close fit between the side plate and the case member.
[0019] In a second aspect, the present application also provides a battery pack, comprising a battery cell as described in any of the above items.
[0020] The battery pack provided in the second embodiment of the present application includes the battery cells described in the technical solution of the first aspect, and thus has all the technical effects of the above embodiments, which will not be repeated here.
[0021] In a third aspect, the present application also provides an electrical device, comprising the battery pack as described above.
[0022] The electrical equipment provided in the third embodiment of the present application includes the battery pack described in the technical solution of the second aspect, and thus has all the technical effects of the above embodiments, which will not be repeated here.
[0023] 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.
[0024] 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
[0025] 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.
[0026] Figure 1 A schematic diagram of the structure of a battery cell provided in an embodiment of the present application;
[0027] Figure 2 A schematic diagram of a portion of the structure of a battery cell provided in an embodiment of the present application;
[0028] Figure 3 A schematic diagram of the structure of a positive electrode assembly or a negative electrode assembly of a battery cell provided in an embodiment of the present application;
[0029] Figure 4 A schematic diagram of the structure of the other side of the positive electrode assembly or negative electrode assembly of the battery cell provided in an embodiment of the present application;
[0030] Figure 5 for Figure 3 Explosion diagram.
[0031] Reference numerals
[0032] 100, battery case; 101, case member; 1011, flange edge; 102, side plate; 200, positive electrode assembly; 201, positive electrode column; 202, positive electrode sealing ring; 203, positive electrode upper insulating member; 204, positive electrode lower insulating member; 205, positive electrode upper pressure plate; 206, positive electrode lower pressure plate; 300, negative electrode assembly; 301, negative electrode column; 302, negative electrode sealing ring; 303, negative electrode upper insulating member; 304, negative electrode lower insulating member; 305, negative electrode upper pressure plate; 306, negative electrode lower pressure plate; 400, explosion-proof valve. DETAILED DESCRIPTION
[0033] 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.
[0034] 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.
[0035] 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.
[0036] 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.
[0037] 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.
[0038] Example
[0039] The electric vehicle industry is developing rapidly. Battery energy and battery safety are the most concerned issues for both car manufacturers and consumers. However, battery energy is often at odds with battery safety. Safety accidents of high-energy ternary lithium batteries are frequent, and the energy of high-safety iron-lithium batteries is limited, which is even more discounted at low temperatures. Therefore, solid-state batteries have gradually entered the public's field of vision. They take into account the two advantages of high safety and high energy density. While achieving the same or even higher energy as ternary lithium batteries, they can also achieve no fire when punctured.
[0040] During the design process, the inventor discovered that due to its characteristics, solid-state batteries do not have electrolytes inside, but use solid electrolyte membranes. The battery needs to be compressed by extremely high pressure (such as 10MPa) in order for the battery performance to be brought into play. Therefore, the solid-state batteries on the market are all soft-pack structures. The aluminum-plastic film has good ductility and elasticity, does not crack under high pressure, and can fit tightly to the bare battery cells inside. In contrast, traditional hard shell structural parts are usually made of aluminum, which will definitely crack under a high pressure of 10MPa. However, the integration efficiency of soft-pack batteries is low, which makes the solid-state battery lose its energy advantage after being grouped into battery packs.
[0041] In view of this, if Figure 1-Figure 5 As shown, in the first aspect, an embodiment of the present application provides a battery cell, including: a battery shell 100, which is provided with a accommodating cavity, wherein the accommodating cavity is configured to accommodate a bare battery cell, and the bare battery cell is provided with a positive electrode ear and a negative electrode ear; a positive electrode assembly 200, including a positive electrode structure, a positive electrode upper pressure plate 205 and a positive electrode lower pressure plate 206, wherein the positive electrode upper pressure plate 205 is connected to the upper end of the positive electrode structure, the positive electrode upper pressure plate 205 is exposed from the battery shell 100, the positive electrode lower pressure plate 206 is connected to the lower end of the positive electrode structure, and the positive electrode structure is connected to the positive electrode ear; a negative electrode assembly 300, including a negative electrode structure, a negative electrode upper pressure plate 305 and a negative electrode lower pressure plate 306, wherein the negative electrode upper pressure plate 305 is exposed from the battery shell 100, the negative electrode upper pressure plate 305 is connected to the upper end of the negative electrode structure, the negative electrode lower pressure plate 306 is connected to the lower end of the negative electrode structure, and the negative electrode structure is connected to the negative electrode ear.
[0042] Exemplarily, the battery cells include but are not limited to solid-state batteries. The battery cells do not need to be provided with injection holes, and the shape of the battery cells can be square, etc. The size of the battery cells is 100-800 mm, 50-150 mm in height, and 8-45 mm in width. Both the positive electrode assembly 200 and the negative electrode assembly 300 can be convexly disposed on the battery housing 100, or the surface of the battery housing 100 can be flush. Of course, the situation in which the positive electrode assembly 200 and the negative electrode assembly 300 are concavely disposed relative to the surface of the battery housing 100 is not excluded.
[0043] The positive electrode assembly 200 and the negative electrode assembly 300 may both be disposed at the upper end of the battery housing 100 , or may be disposed at the left and right sides of the battery housing 100 , respectively.
[0044] It should be noted that the materials of the positive upper pressure plate 205 and the positive lower pressure plate 206 can be consistent or inconsistent, for example, one is made of aluminum and the other is made of copper; similarly, the materials of the negative upper pressure plate 305 and the negative lower pressure plate 306 can be consistent or inconsistent, for example, one is made of aluminum and the other is made of copper.
[0045] In the above implementation process, the battery housing 100 is respectively connected with the positive electrode assembly 200 and the negative electrode assembly 300, the positive electrode assembly 200 includes a positive electrode upper pressure plate 205 and a positive electrode lower pressure plate 206, when the positive electrode upper pressure plate 205 and the positive electrode lower pressure plate 206 are respectively connected to the positive electrode structure, they can be clamped to the battery housing 100, the negative electrode assembly 300 includes a negative electrode upper pressure plate 305 and a negative electrode lower pressure plate 306, when the negative electrode upper pressure plate 305 and the negative electrode lower pressure plate 306 are respectively connected to the negative electrode structure, they can be clamped to the battery housing 100, so that in order not to affect the battery energy density, when the battery housing 100 adopts a thinner material, the positive electrode upper pressure plate 205, the positive electrode lower pressure plate 206, the negative electrode upper pressure plate 305 and the negative electrode lower pressure plate 306 can all play a reinforcing role, and when the positive electrode structure and the positive electrode structure position are vibrated, the battery housing 100 will not be stretched and loosened, thereby improving the safety of the battery cell.
[0046] In some embodiments, the positive electrode structure and / or the negative electrode structure are configured with two at intervals. By configuring the positive electrode structure and / or the negative electrode structure as two, when the battery housing 100 is made of a thinner material, the battery housing 100 does not need to have additional grooves to prevent rotation, and the two positive electrode structures restrain each other to achieve the effect of preventing rotation, and the two negative electrode structures restrain each other to achieve the effect of preventing rotation.
[0047] In some embodiments, the positive electrode structure includes a positive electrode column 201, a positive electrode sealing ring 202 and a positive electrode insulating mechanism, the positive electrode sealing ring 202 is sleeved on the positive electrode column 201, the positive electrode insulating mechanism is connected to the positive electrode column 201, and the positive electrode insulating mechanism is located between the positive electrode upper pressure plate 205 and the positive electrode lower pressure plate 206.
[0048] In the above implementation process, the positive electrode column 201 is penetrated into the battery housing 100 through the positive electrode sealing ring 202, and the positive electrode upper pressure plate 205 and the positive electrode lower pressure plate 206 are both insulated and contacted with the battery housing 100 through the positive electrode insulation mechanism, meeting the safety requirements.
[0049] like Figure 3-Figure 5As shown, the positive electrode insulation mechanism includes a positive electrode upper insulation member 203 and a positive electrode lower insulation member 204. The positive electrode upper insulation member 203 is arranged between the positive electrode upper pressure plate 205 and the battery housing 100, and the positive electrode lower insulation member 204 is arranged in the accommodating cavity. The positive electrode upper insulation member 203 can ensure the insulation between the positive electrode upper pressure plate 205 and the battery housing 100, and the positive electrode lower insulation member 204 can ensure the insulation between the positive electrode lower pressure plate 206 and the battery housing 100, thereby meeting the safety requirements.
[0050] In some embodiments, the negative electrode structure includes a negative electrode column 301, a negative electrode sealing ring 302 and a negative electrode insulating mechanism, the negative electrode sealing ring 302 is sleeved on the negative electrode column 301, the negative electrode insulating mechanism is connected to the negative electrode column 301, and the negative electrode insulating mechanism is located between the negative electrode upper pressure plate 305 and the negative electrode lower pressure plate 306.
[0051] In the above implementation process, the negative electrode column 301 is penetrated into the battery housing 100 through the negative electrode sealing ring 302, and the negative electrode upper pressure plate 305 and the negative electrode lower pressure plate 306 are both insulated and contacted with the battery housing 100 through the negative electrode insulation mechanism, meeting the safety requirements.
[0052] In some embodiments, the negative electrode insulation mechanism includes a negative electrode upper insulation member 303 and a negative electrode lower insulation member 304. The negative electrode upper insulation member 303 is disposed between the negative electrode upper pressure plate 305 and the battery housing 100, and the negative electrode lower insulation member 304 is disposed in the accommodating cavity. The negative electrode upper insulation member 303 can ensure the insulation between the negative electrode upper pressure plate 305 and the battery housing 100, and the negative electrode lower insulation member 304 can ensure the insulation between the negative electrode lower pressure plate 306 and the battery housing 100, thereby meeting the safety requirements.
[0053] In some embodiments, the battery cell also includes an explosion-proof valve 400, which is connected to the battery shell 100 and is located on the side of the battery shell 100 away from the positive electrode assembly 200. The length of the explosion-proof valve 400 is 10 to 60 mm, and the width is 1 / 3 to 5 / 6 of the width of the battery cell shell. The number of explosion-proof valves 400 depends on the length of the battery cell. The number of explosion-proof valves 400 is generally 1. When the length of the battery cell is ≥600 mm, the number of explosion-proof valves 400 is 1 or 2 or more.
[0054] In the above-mentioned implementation process, by arranging the positive electrode assembly 200 and the explosion-proof valve 400 on different sides of the battery housing 100, when the battery pack is actually assembled, the pressure relief materials of the battery cells are uniformly sprayed downward, which facilitates the design of a pressure relief channel at the bottom of the battery pack for converging the pressure relief materials so as to discharge the pressure relief materials to the outside of the battery pack. It can also avoid the thermal runaway eruption of the battery cells affecting the passenger compartment, thereby improving the safety performance of electrical equipment.
[0055] In some embodiments, the battery shell 100 is configured with a first side surface and a second side surface, the second side surface is adjacent to the first side surface, the area of the first side surface is smaller than the area of the second side surface, the first side surface is configured with the positive electrode assembly 200 and / or the negative electrode assembly, and the second side surface is configured to allow the bare battery cell to enter the shell from this side into the accommodating cavity.
[0056] Specifically, the first side includes but is not limited to the top of the battery shell 100, and the second side includes but is not limited to the front end (or rear end) of the battery shell 100. In the actual assembly process, the bare battery cell is arranged in parallel with the positive electrode lower pressure plate 206, and the positive electrode ear is welded to the positive electrode lower pressure plate 206 of the positive electrode assembly 200. After welding, the bare battery cell is placed in the accommodating cavity by bending the positive electrode ear, for example, rotating it 90°.
[0057] In the above implementation process, the first side is used to install the positive electrode assembly 200 and / or the negative electrode assembly 300, and the second side is used to put the bare battery cell into the shell, and the area of the second side is larger than the area of the first side, so that the battery group margin can be no less than 100%, so that the battery shell 100 will not be deformed and cracked.
[0058] In some embodiments, the battery housing 100 includes a housing member 101 and a side plate 102 . A flange 1011 is disposed on one side of the housing member 101 , and the side plate 102 is connected to the flange 1011 .
[0059] Exemplarily, the shell member 101 includes but is not limited to being formed by stamping. The material of the shell member 101 is generally AL-3003, and the material of the side panel 102 is generally AL-3003. In order to ensure the airtightness of the positive electrode assembly 200 and the negative electrode assembly 300 and not affect the energy density of the battery cell, the thickness of the shell member 101 is 1 mm, and the thickness of the side panel 102 is 0.3 mm. After the bare battery cell is shelled, the large surface of the shell member 101 is covered with the side panel 102, and the side panel 102 is tightly fitted with the flange edge 1011 of the shell member 101. The side panel 102 and the flange edge 1011 are welded by penetration welding. After welding, the excess flange edge 1011 is cut off. Finally, the flange edge 1011 of the battery cell is generally 1.5 to 4 mm. In one embodiment of the present application, the size of the flange edge 1011 is 2.6 mm.
[0060] By connecting the side panel 102 to the flange edge 1011 of the shell 101, not only can the bare battery cell be inserted into the shell from the side panel 102, but it is also convenient to connect the bare battery cell to the shell 101 after entering the shell, thereby achieving a close fit between the side panel 102 and the shell 101.
[0061] In a second aspect, the present application also provides a battery pack, comprising the battery cell as described above.
[0062] In a battery pack, there can be multiple battery cells, which can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells is accommodated in a battery housing; of course, a battery pack can also be a battery module formed by connecting multiple battery cells in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in a battery housing. The battery pack may also include other structures, for example, the battery pack may also include a busbar component for realizing electrical connection between multiple battery cells.
[0063] The battery pack provided in the second embodiment of the present application includes the battery cells described in the technical solution of the first aspect, and thus has all the technical effects of the above embodiments, which will not be repeated here.
[0064] In a third aspect, the present application further provides an electric device, including the battery pack as described above. The electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.
[0065] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.
[0066] The vehicle 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 vehicle or an extended-range vehicle, etc. A battery pack is provided inside the vehicle, and the battery pack can be provided at the bottom, head or tail of the vehicle. The battery pack can be used to power the vehicle, for example, the battery pack can be used as the operating power source of the vehicle, and used in the circuit system of the vehicle, such as for the working power demand during the starting, navigation and operation of the vehicle.
[0067] 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.
[0068] In some embodiments of the present application, the battery pack can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.
[0069] The electrical equipment provided in the third embodiment of the present application includes the battery pack described in the technical solution of the second aspect, and thus has all the technical effects of the above embodiments, which will not be repeated here.
[0070] In all the embodiments of the present application, "big" and "small" are relative, and "upper" and "lower" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.
[0071] 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.
[0072] 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.
[0073] 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 battery cell, characterized in that: include: A battery housing is provided with a receiving cavity, wherein the receiving cavity is configured to receive a bare battery cell, wherein the bare battery cell is provided with a positive electrode tab and a negative electrode tab; A positive electrode assembly, comprising a positive electrode structure, a positive electrode upper pressing plate and a positive electrode lower pressing plate, wherein the positive electrode upper pressing plate is connected to the upper end of the positive electrode structure, the positive electrode upper pressing plate is exposed from the battery housing, the positive electrode lower pressing plate is connected to the lower end of the positive electrode structure, and the positive electrode structure is connected to the positive electrode ear; The negative electrode assembly includes a negative electrode structure, a negative electrode upper pressure plate and a negative electrode lower pressure plate, wherein the negative electrode upper pressure plate is exposed from the battery housing, the negative electrode upper pressure plate is connected to the upper end of the negative electrode structure, the negative electrode lower pressure plate is connected to the lower end of the negative electrode structure, and the negative electrode structure is connected to the negative electrode ear.
2. The battery cell according to claim 1, characterized in that: The positive electrode structure and / or the negative electrode structure are / is configured with two at intervals.
3. The battery cell according to claim 1 or 2, characterized in that: The positive electrode structure includes a positive electrode column, a positive electrode sealing ring and a positive electrode insulating mechanism. The positive electrode sealing ring is sleeved on the positive electrode column. The positive electrode insulating mechanism is connected to the positive electrode column, and the positive electrode insulating mechanism is located at the positive electrode upper pressure plate and the positive electrode lower pressure plate.
4. The battery cell according to claim 3, characterized in that: The positive electrode insulation mechanism includes a positive electrode upper insulation member and a positive electrode lower insulation member. The positive electrode upper insulation member is arranged between the positive electrode upper pressure plate and the battery housing, and the positive electrode lower insulation member is arranged in the accommodating cavity.
5. The battery cell according to claim 1 or 2, characterized in that: The negative electrode structure includes a negative electrode column, a negative electrode sealing ring and a negative electrode insulating mechanism. The negative electrode sealing ring is sleeved on the negative electrode column. The negative electrode insulating mechanism is connected to the negative electrode column, and the negative electrode insulating mechanism is located between the negative electrode upper pressure plate and the negative electrode lower pressure plate.
6. The battery cell according to claim 5, characterized in that: The negative electrode insulation mechanism includes a negative electrode upper insulation member and a negative electrode lower insulation member. The negative electrode upper insulation member is arranged between the negative electrode upper pressure plate and the battery housing, and the negative electrode lower insulation member is arranged in the accommodating cavity.
7. The battery cell according to claim 1, characterized in that: The battery cell further includes an explosion-proof valve, which is connected to the battery housing and is located at a side of the battery housing away from the positive electrode assembly.
8. The battery cell according to claim 1, characterized in that: The battery shell is configured with a first side surface and a second side surface, the second side surface is adjacent to the first side surface, the area of the first side surface is smaller than the area of the second side surface, the first side surface is configured with the positive electrode assembly and / or the negative electrode assembly, and the second side surface is configured to allow the bare battery cell to enter the shell from this side into the accommodating cavity.
9. The battery cell according to claim 1 or 8, characterized in that: The battery housing comprises a housing member and a side plate. A flange is disposed on one side of the housing member, and the side plate is connected to the flange.
10. A battery pack, characterized in that: The invention comprises a battery cell as claimed in any one of claims 1 to 9.
11. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 10.