Battery pack and electric device

Abstract

The utility model relates to a battery pack and a power utilization device. The battery pack comprises a box body, a battery module, a domain control assembly and a connecting piece, the box body comprises a wall part, and a containing cavity is defined by the wall part. And the battery module is arranged in the accommodating cavity. The domain control assembly is arranged on the side, away from the containing cavity, of the wall part, and the domain control assembly is electrically connected with the battery module. The connecting piece is connected between the box body and the domain control assembly so as to fix the relative position of the battery module and the domain control assembly. The battery pack is favorable for improving the energy density.

Description

Technical Field

[0001] The present application relates to the field of new energy battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] In the field of new energy batteries, domain control components are usually placed in the box of the battery pack, which will occupy a considerable space in the box, resulting in a decrease in the mass energy density and volume energy density of the battery pack. Summary of the invention

[0003] The embodiments of the present application provide a battery pack and an electrical device, which are beneficial to improving the energy density of the battery pack.

[0004] On the one hand, according to an embodiment of the present application, a battery pack is proposed, including: a box body, including a wall portion, the wall portion encloses a accommodating cavity; a battery module, arranged in the accommodating cavity; a domain control assembly, arranged on a side of the wall portion away from the accommodating cavity, the domain control assembly is electrically connected to the battery module; a connector, connected between the box body and the domain control assembly to fix the relative positions of the battery module and the domain control assembly.

[0005] According to one aspect of an embodiment of the present application, the domain control component and the connector are detachably connected; and / or, the battery pack also includes an adapter component, the adapter component includes a first adapter and a second adapter, one end of the first adapter along its own extension direction is electrically connected to the total negative output terminal of the battery module, and the other end is electrically connected to the total negative input terminal of the domain control component, one end of the second adapter along its own extension direction is electrically connected to the total positive output terminal of the battery module, and the other end is electrically connected to the total positive input terminal of the domain control component.

[0006] According to one aspect of the embodiment of the present application, the connecting member is formed by at least a partial extension of the wall portion, and the domain control component and the box body are spaced apart and distributed in the first direction.

[0007] According to one aspect of the embodiment of the present application, the length dimension of the box in the first direction is greater than the length dimension of the box in the second direction, and the first direction intersects with the second direction.

[0008] According to one aspect of the embodiment of the present application, the wall portion includes a top wall, a bottom wall, and a side wall connected between the top wall and the bottom wall, and the connecting member is formed by one of the bottom wall and the side wall protruding from the top wall along a first direction.

[0009] According to one aspect of an embodiment of the present application, the side walls include first walls arranged in pairs and spaced apart and second walls arranged in pairs and spaced apart, the first walls and the second walls are alternately distributed and connected to each other, the first walls arranged in pairs extend along a first direction and protrude from the top wall to form connecting pieces, and the domain control assembly is located between the connecting pieces arranged in pairs and is connected to each connecting piece, respectively.

[0010] According to one aspect of an embodiment of the present application, the domain control component includes a shell, a connecting part, and a control unit arranged in the shell, the control unit is electrically connected to the battery module, the shell is respectively connected to the connecting parts on both sides along the second direction, and the connecting parts are arranged one-to-one with the connecting pieces and are connected to each other.

[0011] According to one aspect of the embodiment of the present application, the connecting portion is arranged on one side of the connecting member along the third direction and is stacked with the connecting member, and the first direction, the second direction and the third direction are intersected.

[0012] On the other hand, according to an embodiment of the present application, an electrical device is provided, comprising the battery pack as described above.

[0013] According to one aspect of the embodiment of the present application, the electrical device further includes a chassis, and the connecting member and the chassis are an integrated structure.

[0014] The battery pack and the electric device provided in the embodiment of the present application include a box, a battery module, a domain control component and a connector. By arranging the domain control component outside the receiving cavity of the box, and fixing the relative position of the battery module and the domain control component by the connector, the domain control component does not occupy the internal space of the box, thereby increasing the number of battery modules arranged in the receiving cavity, which is conducive to improving the mass energy density and volume energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0016] Figure 1 A top view of a battery pack according to an embodiment of the present application;

[0017] Figure 2 A schematic diagram of a partial structure of a battery pack according to an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of a domain control component in a battery pack according to an embodiment of the present application.

[0019] in:

[0020] 10-box body; 11-wall portion; 11a-accommodating chamber; 111-top wall; 112-bottom wall; 113-side wall; 1131-first wall; 1132-second wall;

[0021] 20-domain control component; 21-housing; 22-connecting part;

[0022] 30-connecting piece;

[0023] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0025] The directional words appearing in the following description are all directions shown in the figures, and do not limit the battery pack and electrical device of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] The technical solutions described in the embodiments of the present application are applicable to battery packs and electrical devices using the battery packs.

[0027] The electrical device may be a vehicle, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0028] In order to better understand this application, Figures 1 to 3 The battery pack and the electrical device according to the application embodiments are described in detail.

[0029] At present, the traditional way of making battery packs is to place the control unit as a whole inside the battery pack box, which occupies a considerable space in the box, resulting in a decrease in the mass energy density and volume energy density of the battery pack.

[0030] Based on the above-mentioned defects, an embodiment of the present application provides a battery pack, which improves the mass energy density and volume energy density of the battery pack by disposing the domain control component 20 outside the box 10.

[0031] The battery pack provided in the embodiment of the present application can be produced and sold separately as an independent component. Of course, it can also be used as a battery pack for an electrical device and serve as a component of the electrical device.

[0032] Please also read Figures 1 to 3 , an embodiment of the present application provides a battery pack, including a case 10, a battery module, a domain control component 20 and a connector 30. The case 10 includes a wall portion 11, and the wall portion 11 encloses a receiving cavity 11a. The battery module is disposed in the receiving cavity 11a. The domain control component 20 is disposed on a side of the wall portion 11 away from the receiving cavity 11a, and the domain control component 20 is electrically connected to the battery module. The connector 30 is connected between the case 10 and the domain control component 20 to fix the relative position of the battery module and the domain control component 20.

[0033] The battery pack provided in the embodiment of the present application, by disposing the domain control component 20 outside the accommodating cavity 11a of the box body 10, and fixing the relative position of the battery module and the domain control component 20 through the connecting member 30, makes it possible for the domain control component 20 not to occupy the internal space of the box body 10, thereby increasing the number of battery modules arranged in the accommodating cavity 11a, which is beneficial to improving the mass energy density and volume energy density of the battery pack.

[0034] In addition, the domain control component 20 is arranged outside the accommodating cavity 11a. When the domain control component 20 needs to be maintained or replaced, there is no need to disassemble the box body 10. It is only necessary to remove the domain control component 20 separately. The operation is simple and convenient, which is beneficial to improving maintenance efficiency and reducing operation difficulty. It can also ensure the sealing requirements of the box body 10, thereby ensuring the safety of the battery pack.

[0035] The battery module may be a structure including battery cells, which can be used as a power source to provide electrical energy to the outside. Optionally, the number of battery modules may be set to more than two, and each battery module includes a plurality of battery cells, and each battery cell is arranged in a certain arrangement.

[0036] In some embodiments, a plurality of battery cells are first connected in series, in parallel, or in hybrid connection to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in hybrid connection to form a whole, and are accommodated in the accommodation cavity 11a.

[0037] Alternatively, the battery cell may be in various shapes, for example, cylindrical, prismatic, blade-shaped, etc.

[0038] The box 10 is used to accommodate the battery module, and the battery module can be protected by the box 10. Optionally, the box 10 can be in various shapes, such as a cylinder, a cuboid, a prism, etc.

[0039] The domain control component 20 may be a component including a plurality of control units. By arranging the domain control component 20 on the side of the wall 11 away from the accommodating cavity 11a, the domain control component 20 does not occupy the space in the accommodating cavity 11a and is easy to replace and repair.

[0040] The connector 30 is connected between the box 10 and the domain control component 20 to fix the relative position between the battery module and the domain control component 20 and ensure the reliability of the electrical connection between the domain control component 20 and the battery module. The domain control component 20 can be connected to any side of the box 10 through the connector 30, making the layout position of the domain control component 20 more flexible.

[0041] Optionally, the connector 30 may be directly connected to the housing 10, or may be connected to the housing 10 through other components. Optionally, the connector 30 may be directly connected to the domain control component 20, or may be connected to the domain control component 20 through other components, so that the connection mode between the domain control component 20 and the housing 10 is more flexible.

[0042] As an optional embodiment, the domain control component 20 and the connecting member 30 are detachably connected.

[0043] By configuring in this manner, the domain control component 20 can be easily disassembled, and the domain control component 20 can be taken out from the battery pack and disassembled separately, thereby improving the convenience of maintenance.

[0044] Optionally, the detachable connection between the domain control component 20 and the connector 30 may be connected by fasteners such as bolts, studs, screws, etc., or may be connected by snaps, or may be connected by matching and plugging of a slide rail and a slide groove. Those skilled in the art may design the connection method between the domain control component 20 and the connector 30 according to actual conditions.

[0045] Optionally, the connecting member 30 is detachably connected to the wall portion 11 of the box body 10 .

[0046] Optionally, the detachable connection between the connector 30 and the wall 11 of the box 10 can be connected by fasteners such as bolts, studs, screws, etc., or can be connected by buckles, or can be connected by matching and plugging of slide rails and slide grooves. Those skilled in the art can design the connection method between the connector 30 and the wall 11 of the box 10 according to actual conditions.

[0047] Optionally, the connecting member 30 may also be fixedly connected to the wall portion 11 of the box body 10. The fixed connection direction between the connecting member 30 and the wall portion 11 of the box body 10 may be welding or bonding.

[0048] As an optional embodiment, the battery pack also includes a adapter assembly, which includes a first adapter and a second adapter. One end of the first adapter along its own extension direction is electrically connected to the total negative output terminal of the battery module, and the other end is electrically connected to the total negative input terminal of the domain control component 20. One end of the second adapter along its own extension direction is electrically connected to the total positive output terminal of the battery module, and the other end is electrically connected to the total positive input terminal of the domain control component 20.

[0049] By setting up a switching component, the effectiveness of the electrical connection between the battery module and the domain control component 20 is ensured.

[0050] Optionally, the first adapter and the second adapter may be configured as a wiring harness, which may include a communication wiring harness for communicating between the devices in the domain control component 20 and the battery module, and may also include a transmission wiring harness for transmitting electric energy between the devices in the domain control component 20 and the battery module.

[0051] Please continue reading Figure 2 As an optional embodiment, the connecting member 30 is formed by at least a partial extension of the wall portion 11 .

[0052] This arrangement facilitates processing and assembly, and the domain control component 20 is connected to the connecting piece 30 formed by extending from the wall portion 11 , which helps to improve the stability of the relative position of the battery module and the domain control component 20 .

[0053] It is understandable that the wall portion 11 encloses a accommodating cavity 11a, and the wall portion 11 has at least a portion that can extend away from the accommodating cavity 11a to form a connector 30, and the domain control component 20 is connected to the connector 30 to form a battery pack with the box body 10.

[0054] Alternatively, the connection member 30 may be formed by extending the wall portion 11 in any direction.

[0055] As an optional embodiment, the domain control component 20 and the box 10 are spaced apart in the first direction X, the length dimension of the box 10 in the first direction X is greater than its length dimension in the second direction Y, and the first direction X intersects with the second direction Y.

[0056] The domain control component 20 can be arranged on any side of the box body 10 along the first direction X. By arranging in this way, the overall occupied area of ​​the battery pack can be reduced, which is beneficial to improving the compactness of the structure. In addition, the material used for the domain control component 20 can be reduced, which is beneficial to reducing costs.

[0057] The domain control component 20 and the box body 10 are spaced apart in the first direction X, which is conducive to assembling the adapter component between the domain control component 20 and the box body 10 to achieve the electrical connection setting between the domain control component 20 and the battery module.

[0058] Furthermore, the domain control component 20 and the housing 10 are arranged to be spaced apart from each other, so that when the domain control component 20 is disassembled or maintained, interference with the housing 10 can be prevented, thereby improving safety.

[0059] Please continue reading Figure 1 and Figure 2 As an optional embodiment, the wall portion 11 includes a top wall 111, a bottom wall 112 and a side wall 113 connected between the top wall 111 and the bottom wall 112, and the connecting member 30 is formed by one of the bottom wall 112 and the side wall 113 protruding from the top wall 111 along the first direction X.

[0060] Optionally, the bottom wall 112 can be arranged to protrude from the top wall 111 along one side of the first direction X, and the protruding portion is formed as a connector 30. Of course, the side wall 113 can also be arranged to protrude from the top wall 111 along one side of the first direction X, and the protruding portion is formed as a connector 30. By arranging in this way, the flexibility of use of the battery pack can be improved, and it can be designed according to different needs.

[0061] Optionally, the connecting member 30 is formed by the bottom wall 112 protruding from the top wall 111 along the first direction X. The connecting member 30 can be formed by at least a portion of the bottom wall 112 protruding, that is, at least a portion of the bottom wall 112 on one side along the first direction X protrudes from the top wall 111, and the domain control component 20 can be connected to the side of the connecting member 30 close to the top wall 111 along the third direction Z.

[0062] Optionally, the connecting member 30 is formed by a side wall 113 protruding from the top wall 111 along a first direction X. When the box body 10 is set to a rectangular structure, at least one side wall 113 is set to protrude from the top wall 111 along the first direction X to form the connecting member 30, and the domain control component 20 is connected to the side of the connecting member 30 close to the accommodating cavity 11a along the second direction Y.

[0063] like Figure 2 As shown, as an optional embodiment, the side wall 113 includes first walls 1131 arranged in pairs and spaced apart and second walls 1132 arranged in pairs and spaced apart, the first walls 1131 and the second walls 1132 are alternately distributed and connected to each other, the paired first walls 1131 extend along the first direction X and protrude from the top wall 111 to form a connector 30, and the domain control component 20 is located between the paired connectors 30 and is connected to each connector 30, respectively.

[0064] This arrangement helps to improve the connection strength between the domain control component 20 and the connector 30, thereby helping to ensure the reliability of the relative position between the domain control component 20 and the housing 10, and also facilitates processing and assembly.

[0065] The domain control component 20 is connected between the connecting members 30 extended from the first wall 1131. Optionally, the domain control component 20 can be connected to the side of the connecting member 30 away from the box body 10 in the first direction X, and can also be connected to the side of the connecting member 30 in the second direction Y, and can also be connected to the side of the connecting member 30 in the third direction Z.

[0066] like Figure 3 As shown, as an optional embodiment, the domain control component 20 includes a shell 21, a connecting part 22 and a control unit arranged in the shell 21, the control unit is electrically connected to the battery module, and the shell 21 is respectively connected to the connecting parts 22 on both sides along the second direction Y, and the connecting parts 22 are one-to-one arranged with the connecting piece 30 and connected to each other.

[0067] By setting a connecting portion 22 to connect with the connecting piece 30, and setting the control unit in the shell 21, the connecting portion 22 is connected to both sides of the shell 21. The shell 21 can protect the control unit. During the assembly or disassembly process, the safety of the control unit in the shell 21 is guaranteed, and it is easy to operate.

[0068] Optionally, the shell 21 has a first hole, and the box body 10 has a second hole connected to the accommodating cavity 11a. At least part of the adapter assembly can extend into the shell 21 through the first hole and into the accommodating cavity 11a through the second hole, so as to be electrically connected to the control unit and the battery module respectively, to ensure the normal operation of the battery pack.

[0069] Optionally, the connecting portion 22 may be configured as a plate-like structure, and connected to the connecting member 30 by fasteners such as bolts, studs, screws, etc.

[0070] Optionally, the connecting portion 22 can also be configured as a structure having a connecting groove. It can be understood that the projection of the connecting portion 22 in the first direction X is a C-shaped structure, and the connecting member 30 is arranged in the connecting groove of the connecting portion 22 and is connected to the connecting portion 22 by fasteners such as bolts, studs, and screws.

[0071] As an optional embodiment, the connecting portion 22 is disposed on one side of the connecting member 30 along the third direction Z and is stacked with the connecting member 30 , and the first direction X, the second direction Y and the third direction Z intersect.

[0072] This arrangement facilitates assembly and helps improve the efficiency of assembly and disassembly of the battery pack.

[0073] Optionally, the connection portion 22 may be configured as a structure such as a flange or a connection plate, and may be detachably connected to the first wall 1131 via fasteners such as bolts, screws, or studs.

[0074] Optionally, the connecting portion 22 may be disposed on a side of the connecting member 30 along the three directions Z close to the top wall 111 , or may be disposed on a side of the connecting member 30 along the three directions Z away from the top wall 111 .

[0075] An embodiment of the present application also provides an electrical device, comprising a battery pack as provided in the above embodiment.

[0076] The electric device provided in the embodiment of the present application includes a battery pack that is beneficial for improving energy density as provided in the above embodiments, and therefore, can be beneficial for improving the performance of the electric device.

[0077] Optionally, when the electrical device is provided as a vehicle, the domain control component 20 can be directly connected to the housing 10 through the connector 30 to form a whole, and be provided on the vehicle. Of course, the domain control component 20 can also be connected to a component on the vehicle through the connector 30, and the housing 10 is connected to the component to fix the relative position of the housing 10 and the domain control component 20, which is beneficial to improve the flexibility of the battery pack being provided on the vehicle.

[0078] As an optional embodiment, the electrical device further includes a chassis, and the connecting member 30 and the chassis are an integrated structure.

[0079] This arrangement helps to improve the flexibility of use of the electrical device.

[0080] The domain control component 20 can be connected to the chassis via the connector 30 , and the box 10 can be set on the chassis. The connection is made in this way to fix the relative position of the battery module and the domain control component 20 .

[0081] It is understandable that the battery pack is set on the vehicle. When there is insufficient space to set the battery pack, the position between the box 10 and the domain control component 20 can be changed. For example, the box 10 can be connected to the chassis, and the domain control component 20 can be connected to a connector on the chassis farther away from the box 10, which is conducive to improving the flexibility of use.

[0082] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery pack, characterized in that: include: The box body comprises a wall portion, wherein the wall portion encloses and forms a receiving cavity; A battery module is arranged in the accommodating cavity; A domain control component is arranged on a side of the wall portion away from the accommodating cavity, and the domain control component is electrically connected to the battery module; A connector is connected between the box and the domain control component to fix the relative position of the battery module and the domain control component.

2. The battery pack according to claim 1, characterized in that: The domain control component and the connecting member are detachably connected; And / or, the battery pack also includes a adapter component, the adapter component includes a first adapter and a second adapter, one end of the first adapter along its own extension direction is electrically connected to the total negative output terminal of the battery module, and the other end is electrically connected to the total negative input terminal of the domain control component, one end of the second adapter along its own extension direction is electrically connected to the total positive output terminal of the battery module, and the other end is electrically connected to the total positive input terminal of the domain control component.

3. The battery pack according to claim 1, characterized in that: The connecting member is formed by at least partially extending the wall portion, and the domain control component and the box body are spaced apart and distributed in a first direction.

4. The battery pack according to claim 3, characterized in that: The length dimension of the box in the first direction is greater than the length dimension of the box in the second direction, and the first direction intersects with the second direction.

5. The battery pack according to claim 4, characterized in that: The wall portion includes a top wall, a bottom wall, and a side wall connected between the top wall and the bottom wall, and the connecting member is formed by one of the bottom wall and the side wall protruding from the top wall along the first direction.

6. The battery pack according to claim 5, characterized in that: The side walls include first walls arranged in pairs and spaced apart and second walls arranged in pairs and spaced apart, the first walls and the second walls are alternately distributed and connected to each other, the first walls arranged in pairs extend along the first direction and protrude from the top wall to form the connecting pieces, and the domain control component is located between the connecting pieces arranged in pairs and is respectively connected to each of the connecting pieces.

7. The battery pack according to claim 6, characterized in that: The domain control component includes a shell, a connecting part and a control unit arranged in the shell, the control unit is electrically connected to the battery module, the shell is respectively connected to the connecting parts on both sides along the second direction, and the connecting parts are arranged one-to-one with the connecting piece and are connected to each other.

8. The battery pack according to claim 7, characterized in that: The connecting portion is arranged at one side of the connecting member along the third direction and is stacked with the connecting member. The first direction, the second direction and the third direction are intersected.

9. An electrical device, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 8.

10. The electrical device according to claim 9, characterized in that: The electrical device further comprises a chassis, and the connecting member and the chassis are an integrated structure.

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