Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment. The battery pack comprises a shell, a battery cell assembly, a first circuit board, a second circuit board and a conductive part, the shell comprises a first shell body and a top cover, and the top cover and the first shell body are configured to be detachably connected. The battery core assembly is arranged in the first shell; the first circuit board is fixed on the top cover, and a plurality of electronic components are arranged on the first circuit board. The second circuit board is fixed on the top cover, the second circuit board is provided with a first connector, and the first connector is configured to be connected with electric equipment in a plug-in mode. The conductive part is connected with the first circuit board and the second circuit board, the conductive part is configured to be detachably connected with the first circuit board, and the conductive part is configured to transmit at least one of electric energy and signals.

Description

Technical Field

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

[0002] Battery packs are currently widely used in drones, smart energy storage devices, and other fields. However, current cyclic battery packs require frequent plugging and unplugging, which easily damages the corresponding connectors and makes replacement inconvenient. Utility Model Content

[0003] In view of this, it is necessary to provide a battery pack and electrical equipment that facilitates connector replacement.

[0004] Embodiments of this application provide a battery pack, including a housing, a cell assembly, a first circuit board, a second circuit board, and a conductive element. The housing includes a first housing and a top cover, which are detachably connected. The cell assembly is disposed within the first housing. The first circuit board is fixed to the top cover and has multiple electronic components. The second circuit board is fixed to the top cover and has a first connector configured for plugging into a power device. The conductive element connects the first and second circuit boards, is detachably connected to the first circuit board, and is configured to transmit at least one of electrical energy and a signal. By configuring the first and second circuit boards, placing the first connector on the second circuit board, and detachably connecting the conductive element to the first circuit board, the second circuit board is easily disassembled, reducing the impact on the first circuit board when replacing the first connector.

[0005] In one or more of the above optional embodiments, the top cover is provided with a separator, forming a first recess and a second recess with the separator. A first circuit board is disposed in the first recess, and a second circuit board is disposed in the second recess. The battery pack includes a first potting resin and a second potting resin. The first potting resin covers the first circuit board, providing insulation and protection for the first circuit board, and the second potting resin covers the second circuit board, providing insulation and protection for the second circuit board.

[0006] In one or more of the above optional embodiments, the area of ​​the second circuit board does not exceed one-third of the area of ​​the first circuit board, thereby reducing the area of ​​the second potting resin covering the second circuit board. This facilitates the peeling off of the second potting resin when disassembling the second circuit board. Furthermore, the area of ​​the first circuit board is larger than that of the second circuit board, which facilitates the detachable connection between the conductive components and the first circuit board and reduces the risk of damage to the first circuit board when plugging or unplugging the conductive components.

[0007] In one or more of the above optional embodiments, the battery cell assembly includes a positive electrode portion and a negative electrode portion, one of the positive electrode portion and the negative electrode portion is connected to a first circuit board, the other is connected to a second circuit board, and is electrically connected to the first circuit board through a conductive element.

[0008] In one or more of the above optional embodiments, the conductive element includes a first conductive element connecting the first circuit board and the second circuit board, the first conductive element being configured to transmit electrical energy.

[0009] In one or more of the above optional embodiments, the positive and negative terminals include flexible copper busbars configured to be bent when the top cover is removed. This facilitates flipping the top cover, thereby facilitating the removal of the second circuit board and replacement of the first connector on the second circuit board.

[0010] In one or more of the above optional embodiments, the battery cell assembly includes multiple battery cells and a third circuit board, with the battery cells connected to the third circuit board. The third circuit board is provided with a first wire connected to the first circuit board, and the first wire is configured to transmit signals. When removing the top cover, the first wire can be bent to facilitate flipping the top cover, thereby facilitating the removal of the second circuit board.

[0011] In one or more of the above optional embodiments, the conductive element includes a second conductive element, which includes a wire harness and a second connector. The first circuit board is provided with a third connector, and the second connector and the third connector are detachably plugged into each other. The second conductive element is configured to transmit signals. When the top cover is removed, the second conductive element can be bent to facilitate flipping the top cover and separating the second connector and the third connector, thereby facilitating the removal of the second circuit board and replacement of the first connector on the second circuit board.

[0012] In one or more of the above alternative embodiments, the first connector is exposed in the housing for easy plug-in connection with electrical equipment.

[0013] Embodiments of this application provide an electrical device including the battery pack in any of the above embodiments.

[0014] The aforementioned battery pack and electrical equipment are equipped with a first circuit board and a second circuit board, with the first connector located on the second circuit board. The conductive components and the first circuit board are detachably connected, which facilitates the removal of the second circuit board and reduces the impact on the first circuit board when replacing the first connector. Attached Figure Description

[0015] Figure 1 Schematic diagrams of the battery pack structure are shown in some embodiments.

[0016] Figure 2 An exploded schematic diagram of the battery pack is shown in some embodiments.

[0017] Figure 3 A schematic diagram of the structure of a portion of the battery pack in some embodiments is shown.

[0018] Figure 4 It shows Figure 3 A schematic diagram of the exploded battery pack in the middle section.

[0019] Figure 5 A schematic diagram of the top cover is shown in some embodiments.

[0020] Figure 6 A schematic diagram of the structure of the second circuit board in some embodiments is shown.

[0021] Figure 7 Schematic diagrams of electrical equipment in some embodiments are shown.

[0022] Explanation of key component symbols:

[0023] Battery pack 100

[0024] Casing 10

[0025] First shell 11

[0026] First side wall 111

[0027] First opening 1111

[0028] Second side wall 112

[0029] Second opening 1121

[0030] Third side wall 113

[0031] Fourth side wall 114

[0032] Bottom wall 115

[0033] Top cover 12

[0034] Separator 121

[0035] first recess 12a

[0036] Second recess 12b

[0037] Battery cell assembly 20

[0038] Cell 21

[0039] Electrode terminal 211

[0040] Positive electrode section 22

[0041] Negative electrode section 23

[0042] First circuit board 30

[0043] First Interface 31

[0044] First electrical connection part 32

[0045] Third electrical connection part 33

[0046] Third connector 34

[0047] Second circuit board 40

[0048] First connector 41

[0049] Second electrical connection part 42

[0050] Fourth electrical connection part 43

[0051] Conductive component 50

[0052] First conductive component 51

[0053] Second conductive element 52

[0054] Second connector 521

[0055] Second harness 522

[0056] Third circuit board 60

[0057] First conductor 61

[0058] Connector 611

[0059] Conductive sheet 62

[0060] 200 electrical appliances

[0061] First direction X

[0062] Second direction Y

[0063] Third direction Z

[0064] The following specific embodiments will further illustrate this application in conjunction with the above-described accompanying drawings. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0066] When a component is considered to be "located" on another component, it can be directly on the other component or may also be interspersed with other components. When a component is considered to be "connected" to another component, it can be directly connected to the other component or may also be interspersed with other components.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0068] It is understandable that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular or equal to each other. For example, in numerical terms, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes; they can be approximately straight lines or planes. From a macroscopic perspective, if the overall direction of extension is straight or plane, the component can be considered a "straight line" or "plane".

[0069] Unless otherwise defined, the term "multiple" in this document, when used to describe the number of components, specifically means that the component is two or more.

[0070] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0071] Please see Figures 1 to 3 One embodiment of this application provides a battery pack 100, including a housing 10, the housing 10 including a first housing 11 and a top cover 12, the first housing 11 and the top cover 12 being detachably connected.

[0072] In some embodiments, the battery pack 100 includes a cell assembly 20 disposed within a first housing 11.

[0073] In some embodiments, the battery pack 100 includes a first circuit board 30, which is fixed to the top cover 12 and has a plurality of electronic components (not shown).

[0074] In some embodiments, the battery pack 100 includes a second circuit board 40 fixed to the top cover 12. The second circuit board 40 is provided with a first connector 41 configured to connect to an electrical device.

[0075] In some embodiments, the first connector 41 is exposed in the housing 10 for easy connection with electrical equipment.

[0076] In some embodiments, the battery pack 100 includes a conductive element 50, which is connected to a first circuit board 30 and a second circuit board 40. The conductive element 50 and the first circuit board 30 are detachably connected. The conductive element 50 is configured to transmit at least one of electrical energy and a signal.

[0077] This application, by setting up a first circuit board 30 and a second circuit board 40, places the first connector 41 on the second circuit board 40. The conductive element 50 and the first circuit board 30 are detachably connected, facilitating the removal of the second circuit board 40 and reducing the impact on the first circuit board 30 when replacing the first connector 41. Optionally, if the first connector 41 is damaged, the entire second circuit board 40 can be removed and replaced. Optionally, if the first connector 41 is damaged, the second circuit board 40 can be removed, and then the first connector 41 can be replaced. After the second circuit board 40 is removed, it is convenient for the operator to replace the first connector 41.

[0078] Optionally, the first circuit board 30 includes a BMS (Battery Management System) component, which includes multiple electronic components that can perform functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0079] Optionally, the first circuit board 30 includes a flexible printed circuit board (FPC). Optionally, the first circuit board 30 includes a printed circuit board (PCB).

[0080] Optionally, the second circuit board 40 includes a flexible printed circuit board (FPC). Optionally, the second circuit board 40 includes a printed circuit board (PCB).

[0081] Please see Figure 2In some embodiments, the first housing 11 includes a first sidewall 111, a second sidewall 112, a third sidewall 113, a fourth sidewall 114, and a bottom wall 115. The first sidewall 111 and the second sidewall 112 are arranged along a first direction X, the third sidewall 113 and the fourth sidewall 114 are arranged along a second direction Y, and the top cover 16 and the bottom wall 115 are arranged along a third direction Z. The first sidewall 111 connects the third sidewall 113 and the fourth sidewall 114, the second sidewall 112 connects the third sidewall 113 and the fourth sidewall 114, the bottom wall 115 connects the first sidewall 111, the second sidewall 112, the third sidewall 113, and the fourth sidewall 114, and the top cover 16 connects the first sidewall 111, the second sidewall 112, the third sidewall 113, and the fourth sidewall 114, forming a receiving space. The battery cell assembly 20 is disposed in the receiving space. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0082] Please see Figures 3 to 6 In some embodiments, the top cover 12 is provided with a separator 121, the separator 121 and the top cover 12 form a first recess 12a and a second recess 12b, a first circuit board 30 is provided in the first recess 12a, and a second circuit board 40 is provided in the second recess 12b.

[0083] In some embodiments, the battery pack 100 includes a first potting resin 101 disposed in the first recess 12a and covering the first circuit board 30 to insulate and protect the first circuit board 30. Optionally, the first potting resin 101 includes silicone.

[0084] In some embodiments, the battery pack 100 includes a second potting resin 102 disposed in the second recess 12b and covering the second circuit board 40 to insulate and protect the second circuit board 40. Optionally, the second potting resin 102 includes silicone.

[0085] In some embodiments, the separator 121 is located between the first potting resin 101 and the second potting resin 102 to reduce the adhesion between the first potting resin 101 and the second potting resin 102, facilitate the peeling off of the second potting resin 102, and reduce the impact on the first potting resin 101 when peeling off the second potting resin 102.

[0086] Please see Figure 4 In some embodiments, the area of ​​the second circuit board 40 is no more than one-third of the area of ​​the first circuit board 30, reducing the area of ​​the second potting resin 102 covering the second circuit board 40, which facilitates the peeling off of the second potting resin 102 when disassembling the second circuit board 40. In addition, the area of ​​the first circuit board 30 is larger than that of the second circuit board 40, which facilitates the detachable connection between the conductive component 50 and the first circuit board 30, reducing the risk of damage to the first circuit board 30 when plugging and unplugging the conductive component 50.

[0087] Please see Figure 2 and Figure 3 In some embodiments, the battery cell assembly 20 includes a plurality of battery cells 21, which are stacked along a first direction X.

[0088] In some embodiments, the battery cell assembly 20 includes a third circuit board 60, with the battery cell 21 connected to the third circuit board 60. The third circuit board 60 is provided with a first wire 61, which is connected to a first circuit board 30. The first wire 61 is configured to transmit signals. When the top cover 12 is removed, the first wire 61 can be bent to facilitate flipping the top cover 12, thereby facilitating the removal of the second circuit board 40. Optionally, the signals include, but are not limited to, voltage and temperature.

[0089] In some embodiments, the battery cell 21 includes an electrode terminal 211, and the third circuit board 60 includes a plurality of conductive sheets 62, with the electrode terminal 211 connected to the conductive sheets 62.

[0090] In some embodiments, the first wire 61 is provided with a connector 611, the first circuit board 30 is provided with a first interface 31, and the connector 611 is disposed on the first interface 31. Optionally, the connector 611 is configured to be detachably connected to the first interface 31.

[0091] In some embodiments, the third circuit board 60 may optionally include a BMS (Battery Management System) component, which includes multiple electronic components that can perform functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0092] Optionally, the third circuit board 60 includes a flexible printed circuit board (FPC). Optionally, the third circuit board 60 includes a printed circuit board (PCB).

[0093] Please see Figure 2 and Figure 3 In some embodiments, the battery cell assembly 20 includes a positive electrode portion 22 and a negative electrode portion 23. One of the positive electrode portion 22 and the negative electrode portion 23 is connected to the first circuit board 30, and the other is connected to the second circuit board 40. They are electrically connected to the first circuit board 30 through a conductive element 50, thereby realizing the transmission of electrical energy and / or signals between the first circuit board 30 and the second circuit board 40.

[0094] Optionally, the positive electrode 22 is connected to the first circuit board 30, and the negative electrode 23 is connected to the second circuit board 40.

[0095] Optionally, the negative electrode 23 is connected to the first circuit board 30, and the positive electrode 22 is connected to the second circuit board 40.

[0096] This application describes an example where the positive electrode 22 is connected to the first circuit board 30 and the negative electrode 23 is connected to the second circuit board 40. The first circuit board 30 is provided with a first electrical connection 32 and the second circuit board 40 is provided with a second electrical connection 42. The positive electrode 22 is connected to the first electrical connection 32 and the negative electrode 23 is connected to the second electrical connection 42.

[0097] In some embodiments, the conductive element 50 includes a first conductive element 51, which connects to the first circuit board 30 and the second circuit board 40. The first conductive element 51 is configured to transmit electrical energy.

[0098] In some embodiments, the first circuit board 30 is provided with a third electrical connection portion 33, and the second circuit board 40 is provided with a fourth electrical connection portion 43. The first conductive element 51 is detachably connected to the third electrical connection portion 33 and connected to the fourth electrical connection portion 43. The current on the positive electrode portion 22 is transmitted to the second circuit board 40 through the first conductive element 51, thereby realizing the transmission of electrical energy.

[0099] In some embodiments, the positive electrode portion 22 and the negative electrode portion 23 include flexible copper busbars, which are configured to be bent when the top cover 12 is removed, so as to facilitate flipping the top cover 12 and thereby facilitate the removal of the second circuit board 40 and replacement of the first connector 41 on the second circuit board 40.

[0100] In some embodiments, the flexible copper busbar comprises a plurality of stacked monolithic copper busbars. Optionally, the thickness of a single copper busbar is 0.1 mm. For example, the flexible copper busbar comprises 20 stacked monolithic copper busbars.

[0101] In some embodiments, the positive electrode portion 22 and the negative electrode portion 23 include a wire harness. When the top cover 12 is removed, the wire harness can be bent to facilitate flipping the top cover 12, thereby facilitating the removal of the second circuit board 40 and replacement of the first connector 41 on the second circuit board 40.

[0102] Please see Figure 3 and Figure 6 In some embodiments, the conductive element 50 includes a second conductive element 52, which includes a second connector 521 and a second wiring harness 522. The first circuit board 30 is provided with a third connector 34, and the second connector 521 and the third connector 34 are detachably plugged into each other. The second conductive element 52 is configured to transmit signals. When the top cover 12 is removed, the second conductive element 52 can be bent to facilitate flipping the top cover 12 and separating the second connector 521 and the third connector 34, thereby facilitating the removal of the second circuit board 40 and replacement of the first connector 41 on the second circuit board 40.

[0103] Please see Figure 7This application provides an electrical device 200 employing the aforementioned battery pack 100. In one embodiment, the electrical device 200 may be, but is not limited to, electronic devices, drones, backup power supplies, electric vehicles, electric motorcycles, electric-assisted bicycles, power tools, large household battery modules, etc.

[0104] Those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the spirit and essence of this application fall within the scope of this application's disclosure.

Claims

1. A battery pack, characterized in that, include: The housing includes a first housing and a top cover, the top cover and the first housing being configured to be detachably connected; The battery cell assembly is disposed within the first housing; The first circuit board is fixed to the top cover, and multiple electronic components are provided on the first circuit board. A second circuit board is fixed to the top cover. The second circuit board is provided with a first connector, which is configured to be plugged into and connected to an electrical device. A conductive element connects the first circuit board and the second circuit board, the conductive element being configured to be detachably connected to the first circuit board, and the conductive element being configured to transmit at least one of electrical energy and a signal.

2. The battery pack as described in claim 1, characterized in that, The top cover is provided with a separator, and forms a first recess and a second recess with the separator. The first circuit board is disposed in the first recess, and the second circuit board is disposed in the second recess. The battery pack includes a first potting resin and a second potting resin, the first potting resin covering the first circuit board and the second potting resin covering the second circuit board.

3. The battery pack as described in claim 2, characterized in that, The area of ​​the second circuit board does not exceed one-third of the area of ​​the first circuit board.

4. The battery pack according to any one of claims 1 to 3, characterized in that, The battery cell assembly includes a positive electrode portion and a negative electrode portion. One of the positive electrode portion and the negative electrode portion is connected to the first circuit board, and the other is connected to the second circuit board. The battery cell assembly is electrically connected to the first circuit board through the conductive element.

5. The battery pack as described in claim 4, characterized in that, The conductive element includes a first conductive element that connects the first circuit board and the second circuit board, and the first conductive element is configured to transmit electrical energy.

6. The battery pack as described in claim 4, characterized in that, The positive electrode portion and the negative electrode portion include soft copper busbars, which are configured to be bent when the top cover is removed.

7. The battery pack according to any one of claims 1 to 6, characterized in that, The battery cell assembly includes multiple battery cells and a third circuit board, wherein the battery cells are connected to the third circuit board; The third circuit board is provided with a first wire, which is connected to the first circuit board and is configured to transmit signals.

8. The battery pack according to any one of claims 1 to 7, characterized in that, The conductive element includes a second conductive element, which includes a wire harness and a second connector. The first circuit board is provided with a third connector. The second connector and the third connector are detachably plugged into each other. The second conductive element is configured to transmit signals.

9. The battery pack according to any one of claims 1 to 8, characterized in that, The first connector is exposed in the housing.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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