Battery module, battery pack and electric device

Abstract

The application provides a battery module, a battery pack and a power utilization equipment, comprising a cover plate assembly and an end plate assembly, the cover plate assembly is arranged along the left-right direction, the end plate assembly is arranged at the left and right ends of the cover plate assembly, at least one of the cover plate assembly and / or the end plate assembly is provided with an extension part, and the cover plate assembly and / or the end plate assembly is provided with a gap near the extension part; a connecting piece is arranged on the extension part and used for adjusting the size of the gap. The end plate assembly is arranged on the left and right sides of the cover plate assembly, the cover plate assembly and / or the end plate assembly is provided with an extension part, and the connecting piece is arranged on the extension part, so that the end plate assembly and the cover plate assembly can be connected into a whole, and the size of the gap between the end plate assembly and the cover plate assembly can be adjusted according to actual conditions, different battery cell pre-tightening force requirements are met, and the safety during use of the battery cell is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery module, a battery pack, and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, with their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, besides improving battery performance, safety is also a crucial issue that cannot be ignored. If battery safety cannot be guaranteed, then the battery is unusable. Therefore, how to enhance battery safety is a pressing technical problem that needs to be solved in battery technology. Utility Model Content

[0004] The purpose of this application is to provide a battery module, battery pack, and electrical device that can enhance battery safety.

[0005] In a first aspect, embodiments of this application provide a battery module, including: a housing structure, including a cover plate assembly and an end plate assembly, the cover plate assembly being configured to be distributed along a left-right direction, the end plate assembly being configured at the left and right ends of the cover plate assembly, at least one of the cover plate assembly and / or the end plate assembly being configured with an extension, and a gap being configured between the two near the extension; and a connector being configured on the extension for adjusting the size of the gap.

[0006] In the above implementation process, the end plate assembly is located on the left and right sides of the cover plate assembly, and the cover plate assembly and / or the end plate assembly are configured with extensions. The connector is set in the extension, which can not only connect the end plate assembly and the cover plate assembly into a whole, but also adjust the size of the gap between the two according to the actual situation to meet the different pre-tightening force requirements of the battery cells and improve the safety of the battery cells during use.

[0007] In some embodiments, the end plate assembly includes a first end plate and a second end plate, the first end plate being located on the left side of the cover plate assembly and the second end plate being located on the right side of the cover plate assembly, and a portion of the upper and lower ends of the first end plate and / or the second end plate being recessed near the center to form a first extension, the cover plate assembly being disposed on one side of the first extension.

[0008] In the above implementation process, the first end plate and the second end plate are located on the left and right sides of the cover plate assembly, respectively, and the first end plate and / or the second end plate are provided with a first extension. The end of the cover plate assembly is located at the position of the first extension, which is conducive to the connection between the end plate assembly and the cover plate assembly. At the same time, the gap between the end plate assembly and the cover plate assembly can be adjusted by the connector, thereby adjusting the preload of the internal battery cell and improving the safety of the battery cell during use.

[0009] In some embodiments, the first end plate and / or the second end plate are connected to the cover plate assembly via the connector.

[0010] In the above process, the connector adjusts the gap between the first end plate and / or the second end plate and the cover plate assembly. The process is simple, the pre-tightening force is easy to control and relatively precise, and the strength is high, so the pre-tightening force of the battery module is not easy to loosen.

[0011] In some embodiments, a gap is provided between the first end plate and / or the second end plate and the cover plate assembly.

[0012] In the above implementation process, by configuring the gap between the first end plate and the cover plate assembly and / or the second end plate and the cover plate assembly, under the action of the connector, the gap between the first end plate and the cover plate assembly can be adjusted, or the gap between the second end plate and the cover plate assembly can be adjusted, so as to adjust the preload. The process is simple, the preload is easy to control and relatively accurate, and the strength is high, so the preload of the battery module is not easy to loosen.

[0013] In some embodiments, the end plate assembly further includes a fixing adhesive disposed in a recessed location on the first end plate and / or the second end plate.

[0014] In the above implementation process, by adding fixing adhesive to the recessed position of the first end plate and / or the second end plate, the stability of the connection between the end plate assembly and the cover plate assembly can be improved, and the torque attenuation of the connector on the end plate assembly and the cover plate assembly can be prevented.

[0015] In some embodiments, the cover plate assembly includes a first cover plate and a second cover plate, the first cover plate and the second cover plate being spaced apart in the vertical direction, and the first cover plate and the second cover plate being respectively connected to the end plate assembly.

[0016] In the above implementation process, the first cover plate and / or the second cover plate are connected to the end plate assembly through a connector. At the same time, the cover plate connected to the end plate assembly through the connector, and there is a gap between the two, can meet the preload requirements of different products and improve the adaptability of the products.

[0017] In some embodiments, the first cover plate and / or the second cover plate are provided with a second extension along the side close to the first extension, and the second extension is connected to the first extension by a fastener.

[0018] In the above implementation process, the second extension body is connected to the first extension body through a fastener, which not only prevents the torque attenuation of the connecting member connecting the end plate assembly and the cover plate assembly, but also ensures the stability between the end plate assembly and the cover plate assembly, and maximizes the use of the space enclosed by the end plate assembly and the cover plate assembly.

[0019] In some embodiments, the cover plate assembly further includes a first side plate and a second side plate, the first side plate and the second side plate being spaced apart in a front-rear direction, and both the first side plate and the second side plate being connected to the cover plate assembly and / or the end plate assembly, respectively.

[0020] In some embodiments, the battery module further includes battery cells, a plurality of which are arranged in a front-to-back direction, and the plurality of battery cells are located within a receiving cavity formed by the end plate assembly and the cover plate assembly, and the positive and negative electrodes of the battery cells are arranged on the front and back sides or the top and bottom sides.

[0021] In the above process, several battery cells are stacked in the cavity, and the positive and negative terminals of the battery cells avoid the pre-tightening direction of the end cap assembly and the cover plate assembly, which can ensure the safety of the battery module.

[0022] In some embodiments, the battery cell is in insulating contact with the cover assembly. This can improve safety.

[0023] Secondly, this application also provides a battery pack, including the battery module as described in any of the above claims.

[0024] Since the battery pack provided in the second aspect includes the battery module, the battery pack has all the technical effects of the battery module, which will not be elaborated here.

[0025] Thirdly, this application also provides an electrical device including the battery pack described above.

[0026] Since the electrical equipment provided by the third party includes a battery pack, the electrical equipment has all the technical effects of the battery pack, which will not be elaborated here.

[0027] Other features and advantages of this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described techniques of this application.

[0028] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the battery module provided in an embodiment of this application;

[0031] Figure 2 This is an exploded view of the battery module provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the cover plate assembly of the battery module provided in an embodiment of this application, viewed from the perspective of its structure.

[0033] Figure 4 for Figure 3 AA section view;

[0034] Figure 5 This is a structural schematic diagram of the end plate assembly of the battery module provided in an embodiment of this application;

[0035] Figure 6 for Figure 5 BB cross-sectional view;

[0036] Figure 7 A schematic diagram of the structure of the first cover plate or the second cover plate of the battery module provided in the embodiments of this application;

[0037] Figure 8 This is a schematic diagram of the structure of the other side of the first or second cover plate of the battery module provided in the embodiments of this application.

[0038] Figure Labels

[0039] 10. Shell structure; 101. First end plate; 102. Second end plate; 103. Gap; 104. First extension; 105. First cover plate; 106. Second cover plate; 107. First side plate; 108. Second side plate; 109. Second extension; 20. Connector; 30. Fixing component; 40. Battery cell; 50. CCS assembly; 60. Fireproof and heat-insulating material; 70. Fixing adhesive; 80. Insulating component. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0041] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0042] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0044] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0045] Example

[0046] With the continuous advancement of green and environmentally friendly themes, the use of electric vehicles is increasing year by year. The power battery is one of the core energy storage devices in electric vehicles. To achieve the required voltage and power for electric vehicles, multiple individual batteries are typically connected in parallel to form a battery module, which is then connected in series. The series-connected battery module is fixed inside the battery box. Existing module designs include either welded module structures or stacked adhesive-bonded non-module structures. However, neither of these designs can meet the 10MPa, 20MPa, or even higher pre-pressure requirements of solid-state batteries for module cells.

[0047] In view of this, such as Figures 1-8 As shown, in a first aspect, embodiments of this application provide a battery module, including: a housing structure 10, including a cover plate assembly and an end plate assembly, the cover plate assembly being configured to be distributed along the left and right direction, the end plate assembly being configured at the left and right ends of the cover plate assembly, at least one of the cover plate assembly and / or the end plate assembly being configured with an extension, and a gap 103 being configured between the two near the extension; and a connector 20, which is configured on the extension and used to adjust the size of the gap 103.

[0048] For example, the length direction of the cover plate assembly is the left-right direction, the end plate assembly is distributed at the left and right ends of the cover plate assembly, and at least one end of the left and right ends of the cover plate assembly has the gap 103 with the end plate assembly, and at that end, the cover plate assembly and the end plate assembly are connected by the connector 20.

[0049] It should be noted that the connector 20 includes, but is not limited to, bolts. Tightening the connector 20 pulls the end plate assembly toward the end of the cover plate assembly. The axial preload of the connector 20 provides a preload force to the end plate assembly toward the battery cell 40. However, no matter how large the preload force is, when the connector 20 is tightened to the required torque, i.e., the required preload force, the gap 103 still exists.

[0050] In the above implementation process, the end plate assembly is located on the left and right sides of the cover plate assembly, and the cover plate assembly and / or the end plate assembly are configured with extensions. The connector 20 is set in the extension, which can not only connect the end plate assembly and the cover plate assembly into a whole, but also adjust the size of the gap 103 between the two according to the actual situation to meet the different pre-tightening force requirements of the battery cell 40, thereby improving the safety of the battery cell 40 during use.

[0051] like Figures 2-6As shown, the end plate assembly includes a first end plate 101 and a second end plate 102. The first end plate 101 is located on the left side of the cover plate assembly, and the second end plate 102 is located on the right side of the cover plate assembly. The upper and lower ends of the first end plate 101 and / or the second end plate 102 are recessed near the center to form a first extension 104. The cover plate assembly is disposed on one side of the first extension 104.

[0052] For example, the first end plate 101 and / or the second end plate 102 are provided with the first extension 104 on the side near the cover plate assembly, wherein the first extension 104 can serve as a connecting carrier, supporting carrier, etc. of the cover plate assembly.

[0053] In one embodiment, both the first end plate 101 and the second end plate 102 are provided with the first extension 104. The first end plate 101 and / or the second end plate 102 are connected to the cover plate assembly through the connector 20. When one of the first end plate 101 and the second end plate 102 is connected to the cover plate assembly through the connector 20, the gap 103 is provided between the end plate and the cover plate assembly. The other end plate can be connected to the cover plate assembly by welding, riveting, bonding or other connection methods. In this connection method, the gap 103 may not be provided between the end plate and the cover plate assembly.

[0054] It should be noted that the end plate assembly can be made of aluminum alloy, high-strength composite material, steel, magnesium alloy, etc., as long as it meets the strength and rigidity requirements. No specific limitation is made here. In order to better hide the connector 20, the end plate assembly can be designed with a recessed platform at the installation position of the connector 20.

[0055] In the above implementation process, the first end plate 101 and the second end plate 102 are located on the left and right sides of the cover plate assembly, respectively, and the first end plate 101 and / or the second end plate 102 are provided with a first extension 104. The end of the cover plate assembly is located at the position of the first extension 104, which is conducive to the connection between the end plate assembly and the cover plate assembly. At the same time, the size of the gap 103 between the end plate assembly and the cover plate assembly can be adjusted by the connector 20, thereby adjusting the pre-tightening force of the internal battery cell 40 and improving the safety of the battery cell 40 during use.

[0056] In some embodiments, the first end plate 101 and / or the second end plate 102 are connected to the cover plate assembly via the connector 20. That is, the first end plate 101 is connected to the cover plate assembly via the connector 20, the second end plate 102 is connected to the cover plate assembly via the connector 20, or both the first end plate 101 and the second end plate 102 are connected to the cover plate assembly via the first connector 20.

[0057] In the above process, the connector 20 adjusts the gap 103 between the first end plate 101 and / or the second end plate 102 and the cover plate assembly. The process is simple, the pre-tightening force is easy to control and relatively precise, and the strength is high, so the pre-tightening force of the battery module is not easy to loosen.

[0058] like Figure 6 As shown, a gap 103 is provided between the first end plate 101 and / or the second end plate 102 and the cover plate assembly. It should be noted that if the end plate (which may be the first end plate 101 and / or the second end plate 102) is connected to the cover plate assembly via the connector 20, then the gap 103 is provided between the end plate and the cover plate assembly.

[0059] In the above implementation process, by configuring the gap 103 between the first end plate 101 and the cover plate assembly and / or the second end plate 102 and the cover plate assembly, under the action of the connector 20, the gap 103 between the first end plate 101 and the cover plate assembly can be adjusted, or the gap 103 between the second end plate 102 and the cover plate assembly can be adjusted to achieve the adjustment of the pre-tightening force. The process is simple, the pre-tightening force is easy to control and relatively accurate, and the strength is high, so the pre-tightening force of the battery module is not easy to loosen.

[0060] Please refer to again Figure 6 The end plate assembly further includes a fixing adhesive 70, which is disposed in the recessed position of the first end plate 101 and / or the second end plate 102.

[0061] For example, the fixing adhesive 70 is a structural adhesive, which can be polyurethane structural adhesive, epoxy resin structural adhesive, acrylic structural adhesive, MS adhesive, or hybrid adhesive. The type of adhesive is not limited, as long as it can achieve the effect of preventing loosening.

[0062] In the above implementation process, by adding fixing adhesive 70 to the recessed position of the first end plate 101 and / or the second end plate 102, the stability of the connection between the end plate assembly and the cover plate assembly can be improved, and the torque attenuation of the connector 20 connected to the end plate assembly and the cover plate assembly can be prevented.

[0063] like Figure 2As shown, the cover plate assembly includes a first cover plate 105 and a second cover plate 106. The first cover plate 105 and the second cover plate 106 are spaced apart in the vertical direction, and the first cover plate 105 and the second cover plate 106 are respectively connected to the end plate assembly.

[0064] In the above implementation process, the first cover plate 105 and / or the second cover plate 106 are connected to the end plate assembly through the connector 20. At the same time, the cover plates connected to the end plate assembly through the connector 20, and there is a gap 103 between them, can meet the pre-tightening force requirements of different products and improve the adaptability of the products.

[0065] In some embodiments, the first cover plate 105 and / or the second cover plate 106 are provided with a second extension 109 along one side close to the first extension 104. The second extension 109 is connected to the first extension 104 by a fastener 30, wherein the fastener 30 includes, but is not limited to, bolts. By tightening the upper and lower fasteners 30, friction is provided to prevent the end plate assembly from slipping.

[0066] Of course, both the first cover plate 105 and the second cover plate 106 are provided with mounting holes, which include, but are not limited to, elongated holes. When the fastener 30 is adapted to the mounting hole, a certain tolerance can be absorbed by the characteristics of the mounting hole.

[0067] It should be noted that the materials of the first cover plate 105 and the second cover plate 106 can be the same. For example, the materials can be aluminum alloy, high-strength composite materials, steel, magnesium alloy, etc., as long as they can meet the strength and rigidity requirements. No specific limitations are made here.

[0068] The number and bolt specifications of the connecting member 20 and the fixing member 30 can be selected according to the actual force required by the battery module. The pre-tightening force of the conventional battery module is converted into pressure of 5 MPa, 7 MPa, 10 MPa, 20 MPa, 30 MPa or even higher. Commonly used bolts can be M5, M6, M8, M10, M12 or even larger bolts, and the strength is commonly graded 8.8, 10.9 or 12.9.

[0069] The specific structural form of the first cover plate 105 and the second cover plate 106 can be a thin plate with thick ribs around it, or a thick plate or other shapes, as long as it can meet the installation of the connector 20 and / or the fastener 30. At the same time, in order to better hide the fastener 30, the first cover plate 105 and the second cover plate 106 are designed as a recessed platform at the installation position of the fastener 30.

[0070] In the above implementation process, the second extension 109 and the first extension 104 are connected by the fastener 30, which can not only prevent the torque of the connector 20 connecting the end plate assembly and the cover plate assembly from decreasing, but also ensure the stability between the end plate assembly and the cover plate assembly, and maximize the use of the space enclosed by the end plate assembly and the cover plate assembly.

[0071] In some embodiments, the cover plate assembly further includes a first side plate 107 and a second side plate 108, the first side plate 107 and the second side plate 108 being spaced apart in a front-rear direction, and both the first side plate 107 and the second side plate 108 being connected to the cover plate assembly and / or the end plate assembly, respectively. For example, the first side plate 107 and the second side plate 108 can be connected to the entire assembly formed by the end plate assembly and the cover plate assembly by means of fasteners or bolts.

[0072] like Figure 2 As shown, the battery module also includes battery cells 40, and a plurality of battery cells 40 are arranged in the front-to-back direction. The plurality of battery cells 40 are located in the receiving cavity formed by the end plate assembly and the cover plate assembly, and the positive and negative electrodes of the battery cells 40 are arranged on the front and back sides or the top and bottom sides.

[0073] The battery cell 40 includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell 40 primarily operates by the movement of metal ions between the positive and negative electrode plates. The positive electrode 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 without the positive active material layer protrudes beyond the current collector with the positive active material layer, and serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode 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 without the negative active material layer protrudes beyond the current collector with the negative active material layer, and serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be carried without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The diaphragm can be made of PP or PE, etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0074] For example, the battery cells 40 can be stacked one by one like conventional battery modules, with fireproof and heat-insulating materials 60 added at intervals as needed for separation. The battery cells 40 are bonded to each other, to the fireproof and heat-insulating materials 60, and to the end plate assembly using double-sided adhesive or liquid adhesive. Next, the stacked battery cells 40 are stacked with end plate assemblies on the left and right, and with cover plate assemblies on the top and bottom. The end plate assembly is pulled closer to the battery cell 40 by tightening the connector 20 to provide pre-tightening force to the battery cell 40. Of course, in order to prevent the torque from decaying, the fixing adhesive 70 can be applied to the end plate assembly before assembling the end plate assembly with the first cover plate 105 and the second cover plate 106. Finally, the remaining CCS assembly 50, the first side plate 107, the second side plate 108, and other components can be integrated in a conventional assembly.

[0075] It should be noted that the positions of the gap 103 and the connector 20 can be changed according to the positive and negative positions of the battery cell 40, as long as the positive and negative positions of the battery cell 40 are kept away from the connection position of the connector 20.

[0076] In the above process, several battery cells 40 are stacked in the receiving cavity, and the positive and negative terminals of the battery cells 40 avoid the pre-tightening direction of the end cap assembly and the cover plate assembly, which can ensure the safety of the battery module.

[0077] like Figure 4 , Figure 6 and Figure 8 As shown, the battery cell 40 is in insulating contact with the cover plate assembly. This can improve safety. For example, the first cover plate 105 and the second cover plate 106 are provided with insulating components 80, which can be heat-pressed insulating film, pasted insulating sheet, sprayed insulating protective coating, etc.

[0078] Secondly, this application also provides a battery pack, including the battery module as described above.

[0079] Since the battery pack provided in the second aspect includes the battery module, the battery pack has all the technical effects of the battery module, which will not be elaborated here.

[0080] Thirdly, this application also provides an electrical device including the battery pack described above.

[0081] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0082] The vehicle has a battery pack installed inside, which can be located at the bottom, front, or rear of the vehicle. The battery pack can be used to power the vehicle; for example, it can serve as the vehicle's operating power source.

[0083] The vehicle may also include a controller and a motor, with the controller controlling the battery pack to power the motor, for example, for the vehicle's power needs during starting, navigation, and driving.

[0084] In some embodiments of this application, the battery pack can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0085] Since the electrical equipment provided by the third party includes a battery pack, the electrical equipment has all the technical effects of the battery pack, which will not be elaborated here.

[0086] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0087] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0088] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply 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 this application.

[0089] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A battery module, characterized in that, include: The housing structure includes a cover plate assembly and an end plate assembly. The cover plate assembly is configured to be distributed in a left-right direction, and the end plate assembly is disposed at the left and right ends of the cover plate assembly. At least one of the cover plate assembly and / or the end plate assembly is provided with an extension, and a gap is provided between the two near the extension. A connector, disposed on the extension, is used to adjust the size of the gap.

2. The battery module according to claim 1, characterized in that, The end plate assembly includes a first end plate and a second end plate. The first end plate is located on the left side of the cover plate assembly, and the second end plate is located on the right side of the cover plate assembly. The upper and lower ends of the first end plate and / or the second end plate are recessed near the center to form a first extension. The cover plate assembly is disposed on one side of the first extension.

3. The battery module according to claim 2, characterized in that, The first end plate and / or the second end plate are connected to the cover plate assembly via the connector.

4. The battery module according to claim 2, characterized in that, A gap is provided between the first end plate and / or the second end plate and the cover plate assembly.

5. The battery module according to claim 2 or 3, characterized in that, The end plate assembly further includes a fixing adhesive disposed in a recessed position of the first end plate and / or the second end plate.

6. The battery module according to claim 2 or 4, characterized in that, The cover plate assembly includes a first cover plate and a second cover plate, which are spaced apart in the vertical direction, and the first cover plate and the second cover plate are respectively connected to the end plate assembly.

7. The battery module according to claim 6, characterized in that, The first cover plate and / or the second cover plate are provided with a second extension body along the side close to the first extension body, and the second extension body is connected to the first extension body by a fastener.

8. The battery module according to claim 6, characterized in that, The cover plate assembly further includes a first side plate and a second side plate, the first side plate and the second side plate being spaced apart in the front-rear direction, and both the first side plate and the second side plate being connected to the cover plate assembly and / or the end plate assembly respectively.

9. The battery module according to claim 1 or 4, characterized in that, The battery module also includes battery cells, and a plurality of battery cells are arranged in the front-to-back direction. The plurality of battery cells are located in the receiving cavity formed by the end plate assembly and the cover plate assembly, and the positive and negative electrodes of the battery cells are arranged on the front and back sides or the top and bottom sides.

10. The battery module according to claim 9, characterized in that, The battery cell is in insulating contact with the cover plate assembly.

11. A battery pack, characterized in that, Includes the battery module as described in any one of claims 1-10.

12. An electrical appliance, characterized in that, Includes the battery pack as described in claim 11.

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