Battery and electric device

Abstract

The utility model relates to a battery and a power utilization device, and belongs to the technical field of battery manufacturing. The battery includes: a case; the battery module is arranged in the box body; the electrical module comprises a box body, a box cover and an electrical assembly, the box body and the box cover are closed to jointly form an electrical space, and the electrical assembly is arranged in the electrical space; wherein the electrical module is arranged on the box body on one side of the battery module along the direction vertical to the height direction of the box body. And the electrical module is integrated on the side surface of the box body of the battery, so that the safety performance and the energy density are relatively high. The utility model further provides a power utilization device which comprises the battery.

Description

Technical Field

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

[0002] In recent years, with the increasing market share of electric vehicles, the market for power batteries has also been expanding. The development of the industry has also placed higher demands on the performance of power batteries. Optimizing battery structure and improving energy density, while ensuring safety performance, is also a development direction.

[0003] Currently, battery packs contain internal electrical modules used for energy distribution and conversion, circuit protection, data monitoring, and more. Further adjustments to the structure and placement of these electrical modules could improve the space utilization of the battery pack and increase battery energy density while maintaining its electrical functionality. Utility Model Content

[0004] Therefore, this application proposes a battery and an electrical device, wherein the electrical module is integrated into the side of the battery casing, which has high safety performance and energy density.

[0005] The battery according to a first aspect of this application includes: a housing; a battery module disposed inside the housing; and an electrical module, the electrical module including a casing, a cover, and electrical components, the casing and the cover being closed to form an electrical space, and the electrical components being disposed inside the electrical space; wherein, along a direction perpendicular to the height direction of the casing, the electrical module is disposed on the casing on one side of the battery module.

[0006] Optionally, the electrical components are fixed to the housing, and the housing includes a bottom plate and a plurality of side plates arranged around the bottom plate, with the housing and the side plates of the housing being fixedly connected.

[0007] Optionally, the lid faces outwards from the box body.

[0008] Optionally, the side panel is provided with an electrical mounting groove, the housing is installed in the electrical mounting groove, and the housing and the cover are closed along the wall thickness direction of the side panel to form the electrical space, and the housing penetrates at least a portion of the side wall of the side panel.

[0009] Optionally, along the wall thickness direction of the side panel, the outer surface of the cover does not protrude beyond the outer surface of the side panel; and / or, the electrical module portion is disposed within the enclosure.

[0010] Optionally, the electrical module further includes: a seal disposed between the cover and the housing; and a buffer disposed between the housing and the electrical component.

[0011] Optionally, the box body has a wiring opening on one side facing the inside of the housing, and the electrical module further includes an electrical connector, one end of which is connected to the electrical component, and the other end of which extends out of the box body through the wiring opening.

[0012] Optionally, the electrical components include a fuse, a data acquisition and detection unit, and a battery power distribution unit.

[0013] Optionally, the wall thickness of the box body is a, and the wall thickness of the enclosure body is b, satisfying: a≤b; and / or

[0014] 0.8mm≤a≤5mm, 1mm≤b≤5mm.

[0015] The electrical device according to the second aspect of this application includes the battery described in the first aspect of this application, the battery being used to provide electrical energy to the electrical device.

[0016] Compared with existing technologies, this solution has the following advantages:

[0017] In this embodiment, the battery's electrical module is disposed on the side of the housing. The housing and the cover are closed to form an electrical space for accommodating the electrical components. On the one hand, the battery module does not occupy space in the height direction of the battery, so that there is enough space on the top of the battery module to arrange components such as busbars and flexible circuit boards, which has a good space utilization rate. On the other hand, the electrical module is arranged away from the top side of the battery module, which reduces the impact of the battery module's heat generation on the electrical module and has a high safety performance.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments 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.

[0020] Figure 1 This is an overall schematic diagram of the battery provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the battery casing provided in an embodiment of this application;

[0022] Figure 3 A schematic diagram of the electrical components of the battery provided in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the electrical module of the battery provided in an embodiment of this application;

[0024] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0025] Figure 6 A schematic diagram of the structure of the housing of the electrical module of the battery provided in an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the structure of the cover of the electrical module of the battery provided in an embodiment of this application.

[0027] Icons: 100-Battery; 110-Box; 111-Base plate; 112-First side plate; 1121-First outer surface; 113-Second side plate; 114-Electrical mounting slot; 120-Battery module; 130-Electrical module; 131-Box body; 1311-Box bottom wall; 1312-Box side wall; 1313-First flange; 1314-Wire passage opening; 1315-Mounting post; 132-Box cover; 1321-Second flange; 1322-Box cover body; 1323-Second outer surface; 133-Electrical components; 1331-Fuse; 1332-Data acquisition and detection unit; 1333-Battery power distribution unit; 134-Seal; 135-Buffer; 136-Electrical connector. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 generally be arranged and designed in various different configurations.

[0029] 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 to illustrate selected embodiments of the 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.

[0030] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, in some embodiments of this application, the battery 100 includes a housing 110, a battery module 120, and an electrical module 130. The battery module 120 is disposed inside the housing 110. The electrical module 130 includes a housing 131, a cover 132, and an electrical component 133. The housing 131 and the cover 132 are closed to form an electrical space, and the electrical component 133 is disposed inside the electrical space. The electrical module 130 is disposed on one side of the housing 110 along a direction perpendicular to the height direction of the housing 110.

[0031] The battery module 120 includes multiple battery cells, a busbar, and a flexible circuit board. An electrical module 130 is electrically connected to the battery module 120 and is used to monitor the operating status of the battery module 120 and control its external power output. The battery cells can be cylindrical, prismatic, or pouch cells.

[0032] In this embodiment, the electrical module 130 of the battery 100 is disposed on the side of the housing 110. The housing 131 and the cover 132 are closed to form an electrical space for accommodating the electrical components 133. On the one hand, the battery module 120 does not occupy space in the height direction of the battery 100, so that there is enough space on the top of the battery module 120 to arrange components such as busbars and flexible circuit boards, which has a good space utilization rate. On the other hand, the electrical module 130 is arranged away from the top side of the battery module 120, which reduces the impact of the heat generated by the battery module 120 on the electrical module 130, and has a high safety performance.

[0033] In one embodiment, the electrical module 130 is partially disposed on the housing 110, that is, partially disposed inside the housing 110 and partially disposed within the housing 110, thereby avoiding excessive thickness of the side panels of the housing 110 and increasing the overall weight. In other embodiments, the electrical module 130 may be entirely disposed on the housing 110, thereby saving as much internal space as possible within the housing 110.

[0034] like Figure 1 and Figure 2 As shown, in some embodiments of this application, the housing 110 has a hexahedral structure, with the length direction of the housing 110 being direction X, the width direction being direction Y, and the height direction being direction Z. The electrical module 130 is disposed on the housing 110 on one side of the battery module 120 along direction Y, thereby reducing the space of the housing 110 along direction Y and improving space utilization.

[0035] This configuration allows for efficient use of the installation space in the width direction of the housing 110, minimizing the aspect ratio of the housing 110 and making the housing 110 nearly square in the XY plane, which facilitates the calculation of the assembly dimensions of the battery 100.

[0036] In other embodiments, the electrical module 130 may also be disposed on the housing 110 on one side of the battery module 120 along the direction X, or at the corner of the housing 110.

[0037] like Figure 5 , Figure 6 and Figure 7 As shown, the box body 131 includes a bottom wall 1311 and a side wall 1312. The edge of the side wall 1312 away from the bottom wall 1311 extends to form a first flange 1313. The box cover 132 includes a cover body 1322 and a second flange 1321 disposed on the edge of the cover body 1322. The second flange 1321 is assembled with the first flange 1313 by threaded parts to achieve a fixed connection between the box body 131 and the box cover 132.

[0038] In some embodiments of this application, the middle part of the box body 131 is recessed in the direction Y towards the interior of the box body 110 to form a box bottom wall 1311, and the middle part of the box cover 132 protrudes in the direction Y towards the exterior of the box body 110 to form a box cover body 1322, and an electrical space is formed between the box bottom wall 1311 and the box cover body 1322.

[0039] In other embodiments, the housing 131 may also protrude outward along the Y direction of the box 110 to form a bottom wall 1311, so that the electrical module 130 is partially disposed inside the box 110, partially disposed on the box 110, and partially disposed outside the box 110, so as to provide sufficient installation space for the electrical component 133.

[0040] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments of this application, the housing 110 includes a bottom plate 111 and a plurality of side plates arranged around the bottom plate 111. One of the side plates is provided with an electrical mounting groove 114. The housing 131 is installed in the electrical mounting groove 114. Along the wall thickness direction of the side plate, the housing 131 and the cover 132 are closed to form an electrical space. The housing 131 penetrates at least a portion of the side wall of the side plate.

[0041] The enclosure 110 includes two first side panels 112 and two second side panels 113. The two first side panels 112 are arranged opposite each other along the Y direction, and the two second side panels 113 are arranged opposite each other along the X direction. The two first side panels 112 and the two second side panels 113 are arranged around the periphery of the base plate 111. The first side panels 112 have electrical mounting grooves 114. The wall thickness direction of the first side panels 112 is the Y direction. The enclosure 131 and the cover 132 are closed along the Y direction.

[0042] The bottom wall 1311 of the box body 131 can protrude inward along the Y direction from the first side plate 112, occupying the internal space of the box body 110; the bottom wall 1311 can also be embedded in the interior of the first side plate 112 along the Y direction, or be flush with the inner surface of the first side plate 112.

[0043] With this configuration, the box 131 penetrates at least a portion of the side panel, which not only fixes the box 131 to the side wall, but also utilizes the space in the wall thickness of the side panel to accommodate the electrical module 130, making the battery 100 structure compact.

[0044] In other embodiments, the electrical mounting slot 114 may not be provided, and the electrical module 130 may be completely disposed inside the housing 110.

[0045] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments of this application, electrical component 133 is fixed to housing 131, and housing 131 is fixedly connected to enclosure 110.

[0046] The bottom wall 1311 of the box is provided with a plurality of mounting posts 1315, and the electrical components 133 are fixed to the mounting posts 1315 by threaded parts.

[0047] In some embodiments of this application, the box body 131 and the housing 110 are integrally formed by stamping, welding or other methods. That is, the middle part of the first side plate 112 is recessed into the housing 110 along the Y direction to form the box body 131. In other embodiments, the box body 131 and the housing 110 can also be detachably assembled into one piece by means of snap-fit, riveting, threaded parts or other methods.

[0048] This configuration simplifies the number of components inside the battery 100 and simplifies the assembly process of the battery 100.

[0049] like Figure 4 As shown, the lid 132 further faces the outside of the box body 110.

[0050] With this configuration, the electrical components 133 can be exposed by removing the cover 132 from the box body 131, which facilitates the maintenance and replacement of the electrical components 133.

[0051] In other embodiments, the lid 132 may also face the upper or inner side of the housing 110.

[0052] like Figure 4 and Figure 5 As shown, in some embodiments of this application, the outer surface of the cover 132 does not protrude from the outer surface of the side plate along the wall thickness direction of the side plate.

[0053] The first side panel 112 has a first outer surface 1121 along the outer side in the direction Y, and the lid body 1322 of the lid 132 has a second outer surface 1323 along the outer side in the direction Y. The second outer surface 1323 is flush with the first outer surface 1121, or the second outer surface 1323 is recessed into the first outer surface 1121.

[0054] With this configuration, the electrical module 130 is integrated into the housing 110 without increasing the external dimensions of the housing 110, making the overall size of the battery 100 smaller and facilitating the calculation of assembly space.

[0055] In other embodiments, the outer surface of the cover 132 may also protrude from the first side plate 112, that is, the second outer surface 1323 protrudes from the first outer surface 1121, which facilitates the removal of the cover 132 for the maintenance and replacement of the electrical components 133.

[0056] like Figure 5 As shown, in some embodiments of this application, the electrical module 130 further includes a seal 134 and a buffer 135. The seal 134 is disposed between the cover 132 and the body 131, and the buffer 135 is disposed between the body 131 and the electrical component 133.

[0057] The seal 134 is a rubber sealing ring, which fills the gap between the annular sealing cover 132 and the box body 131, improving the sealing performance of the electrical module 130.

[0058] The buffer 135 is a flexible sealing and insulating pad made of foam or rubber, which is fixed inside the box 131 and fits against the bottom wall 1311 of the box. When the electrical component 133 is fixed to the box 131 by the mounting post 1315, it fits against the buffer 135, which can reduce the adverse effects of the battery 100 on the electrical component 133 due to handling, vibration and other factors.

[0059] like Figure 3 As shown, in some embodiments of this application, electrical component 133 includes fuse 1331, acquisition and detection unit 1332 and battery power distribution unit 1333.

[0060] The electrical energy from battery 100 is output to the load after passing through fuse 1331. Fuse 1331 blows when there is an overload of current inside battery 100, cutting off the circuit to prevent thermal runaway or equipment damage. The data acquisition and detection unit 1332, also known as the Battery Disconnect Safety Board, monitors the system status to command the battery distribution unit 1333 to disconnect the contactor. The battery distribution unit 1333, also known as the Battery Disconnect Unit, is a component that acquires current, total voltage, and insulation data. It is the core of high-voltage power distribution and safety control for battery 100, not only working with fuse 1331 to cut off fault current but also responding to the data acquisition and detection unit 1332 to disconnect the contactor and cut off the circuit.

[0061] like Figure 3 and Figure 6 As shown, in some embodiments of this application, the box 131 has a wire passage opening 1314 on the side facing the inside of the box 110, and the electrical module 130 also includes an electrical connector 136. One end of the electrical connector 136 is connected to the electrical component 133, and the other end extends out of the box 131 through the wire passage opening 1314.

[0062] The wire passage opening 1314 is provided on the side wall 1312 of the box. After the box body 131 and the enclosure 110 are assembled, the wire passage opening 1314 is located inside the enclosure 110. The electrical connector 136 is a connecting copper busbar that passes through the wire passage opening 1314 and is electrically connected to the electrical component 133.

[0063] Along direction Z, the side wall 1312 of the box has two wire passage openings 1314 on the upper and lower sides respectively. Multiple electrical connectors 136 are provided. The fuse 1331 passes through the two wire passage openings 1314 on the lower side through the two electrical connectors 136 respectively. The acquisition and detection unit 1332 passes through the wire passage opening 1314 on the upper side through the two electrical connectors 136. The battery power distribution unit 1333 passes through the wire passage opening 1314 on the upper side through one electrical connector 136.

[0064] like Figure 4 and Figure 5 As shown, in some embodiments of this application, the wall thickness of the box 131 is a, and the wall thickness of the housing 110 is b, satisfying:

[0065] a≤b.

[0066] The wall thickness of the first side plate 112 along the Y direction is b, and the wall thickness of the bottom wall 1311 along the Y direction is a.

[0067] By limiting the above parameters to the above range, the wall thickness of the box 131 can be locally reduced, so that the box 131 occupies less space in the Y direction, leaving more space for the electrical components 133.

[0068] In some other embodiments of this application, 0.8mm≤a≤5mm, 1mm≤b≤5mm.

[0069] By limiting the above parameters to the above range, the structural strength of the first side plate 112 and the box body 131 can be guaranteed, and the wall thickness of the two can be reasonably controlled so that they are easy to manufacture and form, and the connection is not easy to break.

[0070] Some embodiments of the present application include an electrical device, which includes a battery 100 for providing electrical energy to the electrical device.

[0071] Electrical devices can include automobiles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Automobiles can be gasoline-powered, natural gas-powered, 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, and spacecraft, 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 devices.

[0072] Due to the characteristics of the battery 100 in this application embodiment, the electrical device in this application embodiment also has high safety performance and energy density.

[0073] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0074] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery, characterized in that, include: Box (110); A battery module (120) is disposed inside the housing (110); An electrical module (130) includes a housing (131), a cover (132), and an electrical component (133). The housing (131) and the cover (132) are closed to form an electrical space, and the electrical component (133) is disposed inside the electrical space. The electrical module (130) is disposed on the housing (110) on one side of the battery module (120) in a direction perpendicular to the height direction of the housing (110).

2. The battery according to claim 1, characterized in that, The electrical component (133) is fixed to the housing (131). The housing (110) includes a base plate (111) and a plurality of side plates arranged around the base plate. The housing (131) is fixedly connected to the side plates of the housing (110).

3. The battery according to claim 1, characterized in that, The lid (132) faces outward from the box body (110).

4. The battery according to claim 2, characterized in that, The side panel is provided with an electrical mounting groove (114), and the box body (131) is installed in the electrical mounting groove (114). Along the wall thickness direction of the side panel, the box body (131) and the box cover (132) are closed to form the electrical space. The box body (131) penetrates at least a portion of the side wall of the side panel.

5. The battery according to claim 4, characterized in that, Along the wall thickness direction of the side plate, the outer surface of the box cover (132) does not protrude from the outer surface of the side plate; And / or, the electrical module (130) is partially disposed within the housing (110).

6. The battery according to claim 1, characterized in that, The electrical module (130) also includes: A sealing element (134) is disposed between the cover (132) and the body (131); A buffer (135) is disposed between the housing (131) and the electrical component (133).

7. The battery according to claim 1, characterized in that, The box (131) has a wire passage opening (1314) on the side facing the inside of the box (110). The electrical module (130) also includes an electrical connector (136). One end of the electrical connector (136) is connected to the electrical component (133), and the other end extends out of the box (131) through the wire passage opening (1314).

8. The battery according to claim 1, characterized in that, The electrical components (133) include a fuse (1331), a data acquisition and detection unit (1332), and a battery power distribution unit (1333).

9. The battery according to claim 1, characterized in that, The wall thickness of the box (131) is a, and the wall thickness of the enclosure (110) is b, satisfying: a≤b; and / or 0.8mm≤a≤5mm, 1mm≤b≤5mm.

10. An electrical device, characterized in that, Includes a battery (100) as described in any one of claims 1 to 9, the battery (100) being used to provide electrical energy to the electrical device.

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