Lithium battery pack with Type-C interface and electric tool

Abstract

The utility model belongs to the technical field of pipe expanders, and particularly relates to a lithium battery pack with a Type-C interface and an electric tool. In order to overcome the defect that a battery of an existing electric tool needs to be provided with a special charger, the lithium battery pack with the Type-C interface adopts the following technical scheme that the lithium battery pack with the Type-C interface comprises a battery shell, a battery cover and a battery cover, the battery cell is positioned in the battery shell; the power supply module comprises a power supply circuit board and a power supply interface which are positioned at the inner end of the battery shell, and is connected with the battery cell; and the Type-C module comprises a Type-C interface located at the outer end of the battery shell, a Type-C protocol module and a Type-C charging and discharging circuit board, and is connected with the battery cell. The beneficial effects of the utility model are that: support Type-C charging and discharging, can also be used as an emergency power supply to charge a mobile phone and the like; and charging can be carried out without dismounting the lithium battery pack.

Description

Technical Field

[0001] This utility model belongs to the field of tube expander technology, specifically relating to lithium battery packs and power tools with Type-C interfaces. Background Technology

[0002] Chinese utility model patent with authorization announcement number CN211700365U discloses an electric tube expander, including a tube expander body and a battery pack located in the battery pack receiving cavity of the tube expander body. The battery pack housing is provided with an ID detection port, a voltage detection port and a temperature detection port. The ID detection port, voltage detection port and temperature detection port are all connected to the battery cells through the battery circuit board.

[0003] The aforementioned battery pack, by incorporating multiple detection ports, ensures the lifespan of both the battery pack and the electric expander. However, this battery pack requires a dedicated charger, which is bulky and expensive. Furthermore, it needs to be removed from the charger for charging.

[0004] Furthermore, existing lithium battery packs with Type-C interfaces are not suitable for, or not well suited for, power tools such as electric expanders. Utility Model Content

[0005] This invention addresses the deficiency of existing power tool batteries requiring dedicated chargers by providing a lithium battery pack with a Type-C interface, suitable for power tools and supporting Type-C charging and discharging. This invention also provides a power tool using this lithium battery pack. The lithium battery pack with a Type-C interface of this invention is particularly suitable for electric hose expanders.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a lithium battery pack with a Type-C interface, the lithium battery pack with a Type-C interface comprising:

[0007] Battery casing;

[0008] The battery cell is located inside the battery casing;

[0009] The power supply module includes a power supply circuit board and a power supply interface connected to the battery cell, with the power supply interface located inside the battery casing.

[0010] The Type-C module includes a Type-C interface and a Type-C charging and discharging circuit board connected to the battery cell. The Type-C interface is located at the outer end of the battery casing, and the Type-C charging and discharging circuit board integrates a Type-C protocol module.

[0011] This utility model discloses a lithium battery pack with a Type-C interface. It adds a Type-C interface, a Type-C protocol module, and a Type-C charging and discharging circuit board to the existing power tool battery packs that require a dedicated charger. This enables it to support Type-C charging and discharging and can also be used as an emergency power source to charge mobile phones and other devices. The power supply module, such as the power supply interface and power supply circuit board for powering power tools, is located at the inner end of the lithium battery pack, while the Type-C module is located at the outer end. Charging can be performed without removing the lithium battery pack.

[0012] As an improvement, the battery case includes an inner shell and an outer shell, with the outer end of the inner shell located within the outer shell.

[0013] As an improvement, the inner and outer shells snap together; and / or,

[0014] A latch is formed on the outer casing to connect with the body of the power tool; and / or,

[0015] Inner shell on top, outer shell on the bottom; and / or,

[0016] A foolproof structure is formed between the inner shell and the outer shell.

[0017] As an improvement, a Type-C bracket is provided in the housing, and the Type-C charging and discharging circuit board is fixed on the Type-C bracket. The Type-C charging and discharging circuit board is located between the Type-C bracket and the housing.

[0018] As an improvement, the housing has a bottom wall, the inner side of which extends to form a support column. The support column abuts against the Type-C bracket. There is a gap between the Type-C charging and discharging circuit board and the inner side of the bottom wall of the housing, forming an external heat dissipation space.

[0019] As an improvement, the Type-C bracket extends towards the Type-C charging / discharging circuit board to form an isolation block, which abuts against the Type-C charging / discharging circuit board and forms an internal heat dissipation space; and / or,

[0020] The Type-C bracket has ventilation holes.

[0021] As an improvement, the Type-C bracket has a flat abutting part that abuts against the outer shell. The flat abutting part extends toward the inner shell to form an outer protective heat insulation plate. A power supply bracket is provided in the inner shell, and the power supply bracket extends toward the outer shell to form an inner protective heat insulation plate.

[0022] As an improvement, there are two battery cells: an outer protective heat insulation plate and an inner protective heat insulation plate, which respectively include an edge protective heat insulation plate and a middle protective heat insulation plate between the two battery cells. The middle protective heat insulation plate of the Type-C bracket and the power supply bracket is positioned by positioning holes and positioning posts. There is a gap between the edge protective heat insulation plates of the outer and inner protective heat insulation plates.

[0023] As an improvement, a foolproof positioning notch is provided on the Type-C charging and discharging circuit board, and the Type-C bracket has a foolproof positioning block that cooperates with the foolproof positioning notch.

[0024] As an improvement, a light guide post is provided between the Type-C charging / discharging circuit board and the battery casing, and a light hole is opened on the battery casing, with the light guide post located in the light hole; and / or,

[0025] The battery casing has a Type-C port and a slot that connects to the Type-C port via a connecting groove. The slot has an elastic plug, which includes a snap-fit ​​part that snaps into the slot, a connecting part that connects to the connecting groove, a sealing part that plugs into the Type-C port, and an outwardly protruding operating part.

[0026] As an improvement, lithium battery packs with Type-C interfaces are used in power tools, especially power tools for refrigeration piping such as pipe expanders.

[0027] As an improvement, the Type-C charging / discharging circuit board and the power supply circuit board are connected by leads, and the power supply circuit board has charging / discharging functions.

[0028] As an improvement, the Type-C module also includes a boost / buck module and / or multiple charge / discharge protocol modules integrated on the Type-C charge / discharge circuit board.

[0029] The power tool includes the tool body and a battery pack, wherein the battery pack is the aforementioned lithium battery pack with a Type-C interface.

[0030] The beneficial effects of this utility model of a lithium battery pack with a Type-C interface are: by adding a Type-C module including a Type-C interface, a Type-C protocol module, and a Type-C charging and discharging circuit board, it supports Type-C charging and discharging, and can also be used as an emergency power source to charge mobile phones, etc.; the power supply module, such as the power supply interface and power supply circuit board for powering power tools, is located at the inner end of the lithium battery pack, while the Type-C module is located at the outer end, so charging can be performed without removing the lithium battery pack. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the lithium battery pack according to Embodiment 1 of this utility model.

[0032] Figure 2 This is an exploded view of the lithium battery pack according to Embodiment 1 of this utility model.

[0033] Figure 3 This is a cross-sectional view of the lithium battery pack according to Embodiment 1 of this utility model.

[0034] Figure 4 This is a schematic diagram of the inner shell of the lithium battery pack according to Embodiment 1 of this utility model.

[0035] Figure 5 and Figure 6 This is a schematic diagram of the outer shell of the lithium battery pack according to Embodiment 1 of this utility model from different angles.

[0036] Figure 7 This is a schematic diagram of the power supply bracket and Type-C bracket of the lithium battery pack according to Embodiment 1 of this utility model.

[0037] Figure 8 This is a schematic diagram of the power supply bracket for the lithium battery pack according to Embodiment 1 of this utility model.

[0038] Figure 9 This is a schematic diagram of the Type-C bracket of the lithium battery pack according to Embodiment 1 of this utility model.

[0039] Figure 10 This is a schematic diagram of the elastic plug of the lithium battery pack according to Embodiment 1 of this utility model.

[0040] Figure 11 This is a circuit diagram of the lithium battery pack according to Embodiment 1 of this utility model.

[0041] In the diagram, 1 is the inner shell; 11 is the locking block; 12 is the anti-foolproof groove; and 13 is the first anti-foolproof block.

[0042] 2. Outer shell; 21. Hook; 22. Slot; 23. Support post; 24. Type-C port; 25. Protective cover; 26. Optical aperture; 27. Slot; 28. Connecting slot; 29. ​​Second foolproof block;

[0043] 3. Battery cells;

[0044] 4. Power supply module; 41. Power supply circuit board; 42. Power supply interface; 43. Conductive sheet;

[0045] 5. Type-C module; 51. Type-C interface; 52. Type-C charging and discharging circuit board; 521. Foolproof positioning notch; 53. Light guide column;

[0046] 6. Power supply bracket; 61. Edge protection heat insulation board; 62. Middle protection heat insulation board; 63. Positioning hole; 64. Positioning post;

[0047] 7. Type-C bracket; 71. Tablet contact part; 72. Anti-foolproof positioning block; 73. Isolation block; 74. Heat dissipation holes;

[0048] 8. Elastic plug; 81. Snap-fit ​​part; 82. Connecting part; 83. T-blocking part; 84. Operating part. Detailed Implementation

[0049] The technical solutions of the embodiments of this utility model are explained and described below. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this utility model.

[0050] See Figures 1 to 11 The present invention relates to a lithium battery pack with a Type-C interface, comprising:

[0051] Battery casing;

[0052] The battery cell is located inside the battery casing;

[0053] The power supply module includes a power supply circuit board and a power supply interface connected to the battery cell, with the power supply interface located inside the battery casing.

[0054] The Type-C module includes a Type-C interface and a Type-C charging and discharging circuit board connected to the battery cell. The Type-C interface is located at the outer end of the battery casing, and the Type-C charging and discharging circuit board integrates a Type-C protocol module.

[0055] This utility model discloses a lithium battery pack with a Type-C interface. It adds a Type-C interface, a Type-C protocol module, and a Type-C charging and discharging circuit board to the existing power tool battery packs that require a dedicated charger. This enables it to support Type-C charging and discharging and can also be used as an emergency power source to charge mobile phones and other devices. The power supply module, such as the power supply interface and power supply circuit board for powering power tools, is located at the inner end of the lithium battery pack, while the Type-C module is located at the outer end. Charging can be performed without removing the lithium battery pack.

[0056] Example 1

[0057] See Figures 1 to 11 The lithium battery pack with a Type-C interface 51 in Embodiment 1 of this utility model includes:

[0058] Battery casing;

[0059] Cell 3 is located inside the battery casing;

[0060] The power supply module 4 includes a power supply circuit board 41 located inside the battery casing and a power supply interface 42, which are connected to the battery cell 3.

[0061] The Type-C module 5 includes a Type-C interface 51, a Type-C protocol module, and a Type-C charging and discharging circuit board 52 located at the outer end of the battery casing, and is connected to the battery cell 3.

[0062] In this embodiment, the power supply module 4 includes a conductive sheet 43 that connects the battery cell 3 and the power supply circuit board 41.

[0063] In this embodiment, the inner end of the battery casing is provided with multiple detection ports such as ID detection port, voltage detection port and temperature detection port.

[0064] In this embodiment, the Type-C protocol module is integrated on the Type-C charging and discharging circuit board 52.

[0065] In this embodiment, the battery casing includes an inner casing 1 and an outer casing 2, with the outer end of the inner casing 1 located inside the outer casing 2.

[0066] In this embodiment, the inner shell 1 and the outer shell 2 are snapped together. Multiple snap-fit ​​blocks 11 are formed on the inner shell 1, and multiple snap-fit ​​slots 22 that mate with the snap-fit ​​blocks 11 are formed on the outer shell 2.

[0067] In this embodiment, a hook 21 connected to the body of the power tool is formed on the outer shell 2. There are two hooks 21 located on both sides in the thickness direction, and deformation grooves are formed on both sides of the hook 21.

[0068] In this embodiment, the inner shell 1 is on top and the outer shell 2 is on the bottom.

[0069] In this embodiment, both the inner shell 1 and the outer shell 2 are approximately oval in shape.

[0070] In this embodiment, a foolproof structure is formed between the inner shell 1 and the outer shell 2. A foolproof groove 12 and a first foolproof block 13 are formed on the outer side of the inner shell 1, and a second foolproof block 29 is formed on the inner side of the outer shell 2. When correctly installed, the second foolproof block 29 enters the foolproof groove 12. When not correctly installed, the first foolproof block 13 interferes with the second foolproof block 29.

[0071] In this embodiment, a Type-C bracket 7 is provided in the outer casing 2, and the Type-C charging and discharging circuit board 52 is fixed to the Type-C bracket 7 by screws installed from bottom to top. The Type-C charging and discharging circuit board 52 is located between the Type-C bracket 7 and the outer casing 2.

[0072] In this embodiment, the outer casing 2 has a bottom wall, and a support column 23 extends from the inner side of the bottom wall. The support column 23 abuts against the Type-C bracket 7. There is a gap between the Type-C charging and discharging circuit board 52 and the inner side of the bottom wall of the outer casing 2, forming an external heat dissipation space. In this embodiment, the Type-C bracket 7 extends towards the Type-C charging and discharging circuit board 52 to form an isolation block 73. The isolation block 73 abuts against the Type-C charging and discharging circuit board 52 and forms an internal heat dissipation space.

[0073] In this embodiment, heat dissipation holes 74 are provided on the Type-C bracket 7.

[0074] In this embodiment, the Type-C bracket 7 has a flat plate abutting part 71 that abuts against the outer shell 2. The flat plate abutting part 71 extends toward the inner shell 1 to form an outer protective heat insulation plate. The inner shell 1 is provided with a power supply bracket 6, which extends toward the outer shell 2 to form an inner protective heat insulation plate.

[0075] In this embodiment, there are two battery cells 3. The outer protective heat insulation plate and the inner protective heat insulation plate each include an edge protective heat insulation plate 61 and an intermediate protective heat insulation plate 62 between the two battery cells 3. The intermediate protective heat insulation plate 62 of the power supply bracket 6 and the Type-C bracket 7 is positioned by positioning holes 63 and positioning posts 64. There is a heat dissipation gap (in the insertion direction) between the edge protective heat insulation plates 61 of the power supply bracket 6 and the Type-C bracket 7. In other embodiments, the number of battery cells 3 can be other. There is a heat dissipation gap between the two edge protective heat insulation plates 61 of the power supply bracket 6. There is a heat dissipation gap between the two edge protective heat insulation plates 61 of the Type-C bracket 7.

[0076] In this embodiment, a foolproof positioning notch 521 is provided on the Type-C charging and discharging circuit board 52, and the Type-C bracket 7 has a foolproof positioning block 72 that cooperates with the foolproof positioning notch 521. There are two foolproof positioning notches 521 and two foolproof positioning blocks 72, and they are located on the same side in the length direction.

[0077] In this embodiment, an LED light is provided on the Type-C charging / discharging circuit board 52, and a light guide post 53 is placed between the Type-C charging / discharging circuit board 52 and the bottom wall of the outer casing 2. A light hole 26 is opened on the battery casing, and the light guide post 53 is located in the light hole 26. Since the external heat dissipation space between the Type-C charging / discharging circuit board 52 and the bottom wall of the outer casing 2 has a certain height, a light guide post 53 is set to guide the light emitted by the LED light to ensure that the LED light can be easily observed by the user. A protective sleeve 25 is formed on the outer casing 2, surrounding the light hole 26, and the light guide post 53 has an inverted convex hole that is larger at the top and smaller at the bottom, and the light guide post 53 is located in the hole of the protective sleeve 25.

[0078] In this embodiment, a Type-C hole 24 is provided on the battery casing, and a card hole 27 is also provided on the battery casing, which is connected to the Type-C hole 24 through a connecting groove 28. An elastic plug 8 is provided in the card hole 27. The elastic plug 8 includes a snap-fit ​​part 81 that snaps into the card hole 27, a connecting part 82 in the connecting groove 28, a sealing part 83T in the Type-C hole 24, and an outwardly protruding operating part 84.

[0079] In this embodiment, the Type-C charging / discharging circuit board 52 and the power supply circuit board 41 are connected by leads, and the power supply circuit board 41 has charging and discharging functions. The leads connecting the Type-C charging / discharging circuit board 52 and the power supply circuit board 41 are not shown in the figure. With this structure, the existing power supply circuit board 41 can be reused.

[0080] SeeFigure 11 In this embodiment, the Type-C module 5 also includes a boost-buck module (BUCK-BOSOT module) and multiple charging and discharging protocol modules integrated on the Type-C charging and discharging circuit board 52. The charging and discharging protocol modules include FCP input / output fast charging protocol, AFC input / output fast charging protocol, DRP TI.SRC protocol, PD3.1 input / output fast charging protocol, and QC2.0 / QC3.0 / QC3.0+ output fast charging protocol, etc. The boost-buck module adjusts the input and output voltage and current of the Type-C charging and discharging circuit board 52 according to the corresponding protocol module. The integration of multiple charging and discharging protocol modules enables compatibility with various chargers on the market, such as Apple, Huawei, and Xiaomi mobile phone chargers.

[0081] In this embodiment, the Type-C charging / discharging circuit board 52 has a protocol identification module. When the charger's protocol is identified, it automatically matches the corresponding protocol and outputs the corresponding voltage through the boost / buck module. If the matching protocol cannot be identified, it enters slow charging mode (5V2A).

[0082] In this embodiment, the Type-C module 5 can directly use existing power management chips such as Injoinic's IP2369. Of course, it can also be customized based on IP2369 as needed.

[0083] In this embodiment, during assembly, the parts other than the inner shell 1, outer shell 2, light guide post 53 and elastic plug 8 are assembled in advance (this part can be called the corepack component). Then, the light guide post 53 and elastic plug are installed on the outer shell 2. Finally, the outer shell 2 and inner shell 1 are put on the corepack component and inserted externally. After insertion, the outer shell 2 and inner shell 1 are snapped together, and at the same time, the outer shell 2 and inner shell 1 abut against the corepack component, fixing the corepack component to the outer shell 2 and inner shell 1.

[0084] The beneficial effects of the lithium battery pack with a Type-C interface 51 in Embodiment 1 of this utility model are as follows: By adding a Type-C module 5, including a Type-C interface, a Type-C protocol module, and a Type-C charging and discharging circuit board 52, it supports Type-C charging and discharging, eliminating the need for a dedicated charger and serving as an emergency power source for charging mobile phones, etc.; it is compatible with both dedicated chargers and Type-C-compatible chargers, such as mobile phone chargers; the power supply module 4, including the power supply interface 42 for powering power tools and the power supply circuit board 41, is located at the inner end of the lithium battery pack, while the Type-C module 5 is located at the outer end, allowing charging without removing the lithium battery pack; the inner shell 1 and the outer shell 2 are snap-fitted together, requiring fewer screws (only screws are used between the Type-C bracket 7 and the Type-C charging and discharging circuit board 52); the Type-C charging and discharging circuit board 52 forms heat dissipation spaces on both the top and bottom; the battery cell 3 forms heat dissipation spaces on its sides and top and bottom; the Type-C bracket 7 and the power supply bracket 6 protect the battery cell 3; and it integrates multiple charging and discharging protocol modules, making it compatible with various existing chargers.

[0085] This utility model also discloses a power tool, including a tool body and a battery pack, wherein the battery pack is the aforementioned lithium battery pack with a Type-C interface. The connection structure between the battery pack and the tool body can refer to existing technologies such as CN211700365U.

[0086] The above description is merely a specific embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A lithium battery pack with a Type-C interface, characterized in that: Lithium-ion battery packs with Type-C interfaces include: Battery casing; The battery cell (3) is located in the battery casing; The power supply module (4) includes a power supply circuit board (41) connected to the battery cell (3) and a power supply interface (42), with the power supply interface (42) located at the inner end of the battery case; The Type-C module (5) includes a Type-C interface (51) and a Type-C charging and discharging circuit board (52) connected to the battery cell (3). The Type-C interface (51) is located at the outer end of the battery case, and the Type-C charging and discharging circuit board (52) integrates a Type-C protocol module.

2. The lithium battery pack with a Type-C interface according to claim 1, characterized in that: The battery casing includes an inner casing (1) and an outer casing (2), with the outer end of the inner casing (1) located inside the outer casing (2).

3. The lithium battery pack with a Type-C interface according to claim 2, characterized in that: The inner shell (1) and the outer shell (2) are snapped together; and / or, A latch (21) is formed on the outer casing (2) to connect with the body of the power tool; and / or, The inner shell (1) is on top, and the outer shell (2) is on the bottom; and / or, A foolproof structure is formed between the inner shell (1) and the outer shell (2).

4. The lithium battery pack with a Type-C interface according to claim 2, characterized in that: The outer casing (2) is provided with a Type-C bracket (7), and the Type-C charging and discharging circuit board (52) is fixed on the Type-C bracket (7). The Type-C charging and discharging circuit board (52) is located between the Type-C bracket (7) and the outer casing (2).

5. The lithium battery pack with a Type-C interface according to claim 4, characterized in that: The outer casing (2) has a bottom wall, and the inner side of the bottom wall extends to form a support column (23). The support column (23) abuts against the Type-C bracket (7). There is a gap between the Type-C charging and discharging circuit board (52) and the inner side of the bottom wall of the outer casing (2) to form an external heat dissipation space.

6. The lithium battery pack with a Type-C interface according to claim 5, characterized in that: The Type-C bracket (7) extends toward the Type-C charging / discharging circuit board (52) to form an isolation block (73), the isolation block (73) abuts against the Type-C charging / discharging circuit board (52) and forms an internal heat dissipation space; and / or, Heat dissipation holes (74) are provided on the Type-C bracket (7).

7. The lithium battery pack with a Type-C interface according to claim 5, characterized in that: The Type-C bracket (7) has a flat abutting part (71) that abuts against the outer shell (2). The flat abutting part (71) extends an outer protective heat insulation plate toward the inner shell (1). The inner shell (1) is provided with a power supply bracket (6). The power supply bracket (6) extends toward the outer shell (2) to form an inner protective heat insulation plate.

8. The lithium battery pack with a Type-C interface according to claim 7, characterized in that: There are two battery cells (3). The outer protective heat insulation plate and the inner protective heat insulation plate respectively include an edge protective heat insulation plate (61) and an intermediate protective heat insulation plate (62) between the two battery cells (3). The intermediate protective heat insulation plate (62) of the power supply bracket (6) and the Type-C bracket (7) is positioned by positioning holes (63) and positioning posts (64). There is a gap between the edge protective heat insulation plates (61) of the power supply bracket (6) and the Type-C bracket (7).

9. The lithium battery pack with a Type-C interface according to claim 4, characterized in that: The Type-C charging and discharging circuit board (52) has a foolproof positioning notch (521), and the Type-C bracket (7) has a foolproof positioning block (72) that cooperates with the foolproof positioning notch (521).

10. The lithium battery pack with a Type-C interface according to claim 1, characterized in that: A light guide post (53) is provided between the Type-C charging / discharging circuit board (52) and the battery casing, and a light hole (26) is opened on the battery casing, with the light guide post (53) located in the light hole (26); and / or, A Type-C port (24) is provided on the battery casing. A locking hole (27) is also provided on the battery casing, communicating with the Type-C port (24) via a connecting groove (28). An elastic plug (8) is provided in the locking hole (27). The elastic plug (8) includes a locking part (81) that engages with the locking hole (27), a connecting part (82) in the connecting groove (28), a sealing part (83T) in the Type-C port (24), and a protruding operating part (84); and / or, Lithium-ion battery packs with Type-C interfaces are used for power tools; and / or, The Type-C charging / discharging circuit board (52) and the power supply circuit board (41) are connected by leads, and the power supply circuit board (41) has charging / discharging functions.

11. The lithium battery pack with a Type-C interface according to claim 1, characterized in that: The Type-C module (5) also includes a boost / buck module and / or multiple charge / discharge protocol modules integrated on the Type-C charge / discharge circuit board (52).

12. A power tool, comprising a tool body and a battery pack, characterized in that: The battery pack is a lithium battery pack with a Type-C interface as described in any one of claims 1 to 11.

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