Plug-in assembly, installation method thereof and battery pack

Abstract

The invention relates to a plug-in assembly, which comprises a first plug-in piece and a second plug-in piece which are matched with each other, the first plug-in piece comprises a first shell and a first wiring terminal which is at least partially accommodated in the first shell, and the second plug-in piece comprises a second shell and a second wiring terminal which is at least partially accommodated in the second shell. The plugging assembly further comprises a protective sleeve, the protective sleeve is arranged on the second connector in a sleeving mode, an accommodating cavity is defined by the protective sleeve, and the first connector and the second connector are at least partially accommodated in the accommodating cavity. And waterproof fillers are arranged in gaps between the protective sleeve and the first connector and between the protective sleeve and the second connector. The plugging assembly is small in size, compact in structure and good in waterproof performance. The invention also provides an installation method of the plugging assembly and a battery pack.

Description

Technical Field

[0001] The invention relates to a connector assembly and a mounting method thereof, and a battery pack having the connector assembly. Background Art

[0002] The connector assembly is a common electrical component in the field of electrical equipment. When a first connector is connected to a second connector, information or current can be transmitted.

[0003] Connectors need to maintain electrical performance under various complex working conditions, and waterproofing is an important performance that connectors need to meet. Conventional waterproof connectors on the market are large in size and complex to assemble, making them inconvenient to use on some electrical equipment that have size requirements. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention provides a connector assembly with small size, compact structure and good waterproof performance.

[0005] The technical solution adopted by the present invention to solve the problems of the prior art is:

[0006] A connector assembly includes a first connector and a second connector that are matched with each other, the first connector includes a first shell and a first terminal at least partially accommodated in the first shell, the second connector includes a second shell and a second terminal at least partially accommodated in the second shell, the first terminal and the second terminal are matched with each other to achieve electrical connection, the connector assembly also includes a protective cover, the protective cover is sleeved on the second connector, the protective cover encloses to form a receiving cavity, the first connector and the second connector are at least partially accommodated in the receiving cavity, and a waterproof filler is provided in the gap between the protective cover and the first connector and the second connector.

[0007] By providing a waterproof filler in the gap between the protective cover and the first connector and the second connector, water cannot enter the interior of the connector assembly, thereby improving the reliability of the connector assembly. In addition, the connector assembly has a simple, compact structure and can be applied to a variety of usage scenarios.

[0008] Optionally, the inner cavity of the second shell is at least partially filled with the waterproof filler.

[0009] Optionally, the first connector also includes a first wiring harness connected to the first shell, the first wiring harness is used to be electrically connected to the first terminal, and the waterproof filler is arranged at the joint between the first wiring harness and the first shell and at least partially wraps the first wiring harness.

[0010] Optionally, the protective cover is higher than the first connector by more than or equal to 3 mm.

[0011] Optionally, the distance between the inner wall of the protective sleeve and the second connector is greater than or equal to 1 mm.

[0012] Optionally, the waterproof filler includes silicone grease.

[0013] Optionally, the waterproof filler is made of insulating material.

[0014] The present invention also provides an installation method for a connector assembly, the connector assembly comprising a protective cover and a first connector and a second connector that are detachably matched, the protective cover encloses a receiving cavity, the first connector comprises a first housing and a first terminal at least partially received in the first housing, the second connector comprises a second housing and a second terminal at least partially received in the second housing, the installation method comprising the following steps:

[0015] Putting a protective cover on the second connector;

[0016] The first connector is matched with the second connector to realize the electrical connection between the first terminal and the second terminal, and the first connector and the second connector are at least partially accommodated in the accommodating cavity;

[0017] A waterproof filler is filled in the gap between the protective sleeve and the first connector and the second connector.

[0018] By adopting the installation method of the above-mentioned connector assembly, the installation is fast and reliable, and the installation cost and time are saved while meeting the waterproof requirements.

[0019] Optionally, before the first connector is mated with the second connector, the inner cavity of the second shell is at least partially filled with the waterproof filler.

[0020] The present invention also provides a battery pack that can be detachably connected to an electrical device, comprising: a shell; a battery cell group accommodated in the shell, the battery cell group comprising a plurality of battery cells electrically connected to each other; an electrical connector for inputting and / or outputting power to the electrical device, comprising a plurality of battery pack terminals for connecting to the electrical device; a control circuit board electrically connected to the battery cells and the electrical connector; the battery pack also comprises at least one of the above-mentioned connector assemblies, the connector assembly being electrically connected to the control circuit board.

[0021] By providing a waterproof connector assembly in the battery pack, the connector assembly connection is ensured to be safe and reliable, thereby ensuring the reliability of the battery pack.

[0022] Optionally, the second connector and the protective cover are arranged on the control circuit board.

[0023] Optionally, the battery pack further includes a packaging box, the control circuit board is at least partially accommodated in the packaging box, and the control circuit board is at least partially covered by a sealant.

[0024] Optionally, the protective cover is fixed to the control circuit board by the sealant.

[0025] Optionally, a groove is provided between the protective cover and the control circuit board, and the sealant flows into the receiving cavity through the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The embodiments of the present invention will be further described in conjunction with the following drawings:

[0027] Figure 1 It is a schematic diagram of a connector assembly according to an embodiment of the present invention.

[0028] Figure 2 and Figure 3 yes Figure 1 Exploded views of the connector assembly shown in different orientations.

[0029] Figure 4 It is a flow chart of a method for installing a connector assembly according to an embodiment of the present invention.

[0030] Figure 5 is a schematic diagram of a battery pack according to an embodiment of the present invention.

[0031] Figure 6 yes Figure 5 An exploded view of the battery pack is shown.

[0032] Figure 7 yes Figure 5 A schematic diagram of a cell group of a battery pack is shown.

[0033] Figure 8 yes Figure 5 Schematic diagram of the battery cells of the battery pack shown.

[0034] Fig. 9 yes Figure 5 A schematic diagram of adjacently stacked battery cells and support members of a battery pack is shown.

[0035] Fig.10 yes Figure 5 The schematic diagram of the second connector provided on the control circuit board of the battery pack shown is not equipped with a protective cover.

[0036] Fig.11 yes Figure 5 A schematic diagram of a second connector mounting protective cover provided on a control circuit board of a battery pack is shown. DETAILED DESCRIPTION

[0037] The present application will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional changes made by a person of ordinary skill in the art based on these embodiments are all within the scope of protection of the present application.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. In the illustrated embodiment, the direction representations, i.e., up, down, left, right, front, and back, etc., are relative, and are used to explain that the structure and movement of different components in this application are relative. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, it is believed that these representations will also change accordingly.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] Please refer to Figures 1 to 3 Some embodiments of the present invention provide a connector assembly 10, including a first connector 100 and a second connector 200 that are matched with each other, the first connector 100 includes a first shell 101 and a first terminal 110 at least partially accommodated in the first shell 101, the second connector 200 includes a second shell 201 and a second terminal 210 at least partially accommodated in the second shell 201, the first terminal 110 and the second terminal 210 are matched with each other to achieve electrical connection, the connector assembly 10 also includes a protective cover 300, the protective cover 300 is sleeved on the second connector 200, the protective cover 300 encloses a receiving cavity 301, the first connector 100 and the second connector 200 are at least partially accommodated in the receiving cavity 301, and a waterproof filler (not shown) is provided in the gap between the protective cover 300 and the first connector 100 and the second connector 200.

[0041] By providing a waterproof filler in the gap between the protective cover and the first connector and the second connector, water or other liquids cannot enter the interior of the connector assembly, thereby improving the reliability of the connector assembly. The connector assembly has a simple, compact structure and can be applied to a variety of usage scenarios.

[0042] It is worth noting that “a waterproof filler is provided in the gap between the protective cover 300 and the first connector 100 and the second connector 200” can be understood as a waterproof filler is provided in the space in the receiving cavity 301 that does not receive the first connector 100 and the second connector 200.

[0043] Further, such as Figure 2 and Figure 3 As shown, the first connector 100 is provided with a first fixing member 102, and the second connector 200 is provided with a second fixing member 202 for connecting with the first fixing member 102. Optionally, the first fixing member 102 is arranged on the side wall of the first housing 101, and is arranged as a slot formed by a pair of oppositely arranged convex ribs; the second fixing member 202 is arranged to protrude outward from the side wall of the second housing 201, and is arranged as a convex rib that can be engaged in the slot. The connection between the first connector 100 and the second connector 200 can also be in other forms, and the present invention is not limited to this.

[0044] Optionally, the first wiring terminal 110 and the second wiring terminal 210 are pin-type terminals. Of course, the first wiring terminal 110 and the second wiring terminal 210 may also be other types of terminals that are easily known to those skilled in the art, and the present invention is not limited thereto.

[0045] In some embodiments, the inner cavity 203 of the second housing 201 is at least partially filled with a waterproof filler (not shown), which can further prevent water vapor or other impurities from entering the interior of the connector assembly. Optionally, the inner cavity 203 of the second housing 201 is completely filled with the waterproof filler.

[0046] Optionally, the waterproof filler comprises silicone grease, and the dropping point of the silicone grease is about 210°C.

[0047] Optionally, the waterproof filler is made of insulating material to avoid a short circuit when the first connecting terminal 110 is electrically connected to the second connecting terminal 210 .

[0048] Optionally, the dropping point of the waterproof filler is greater than 100° C. Since the temperature of the connector assembly is below 100° C. in most working conditions, and the dropping point of the waterproof filler is greater than 100° C., it can be ensured that the waterproof filler is in a grease state under working conditions, so that water vapor cannot enter.

[0049] In some embodiments, the first connector 100 also includes a first wiring harness 120 connected to the first shell 101, and the first wiring harness 120 is used to be electrically connected to the first terminal 110. The waterproof filler is arranged at the joint between the first wiring harness 120 and the first shell 101 and at least partially wraps the first wiring harness 120 to prevent water vapor or other impurities from entering from the joint between the first wiring harness 120 and the first shell 101.

[0050] Specifically, one end of the first wiring harness 120 is connected to the end of the first housing 101 away from the protective cover 300, and the other end of the first wiring harness 120 is used to connect the electrical component. Optionally, a waterproof glue is further provided at the joint between the first wiring harness 120 and the first housing 101, and the waterproof filler at least partially covers the waterproof glue to enhance the sealing and waterproof effect.

[0051] Further, the second connector 200 includes a second wire harness 220 connected to the second housing 201, and the second wire harness 220 is used to be electrically connected to the second terminal 210. Specifically, one end of the second wire harness 220 is connected to the end of the second housing 201 away from the protective cover 300, and the other end of the second wire harness 220 is used to connect the electrical component.

[0052] In some embodiments, the protective cover 300 is configured to be in a square box shape, and the first opening 303 and the second opening 305 are respectively provided at both ends of the protective cover 300. The second connector 200 is provided through the first opening 303. Optionally, the second housing 201 is provided in the receiving cavity 301, and the second wiring harness 220 extends out from the first opening 303. The first connector 100 can enter from the second opening 305 to achieve matching with the second connector 200. Further, in order to improve the waterproof effect, a waterproof filler is provided between the first opening 303 and the second wiring harness 220.

[0053] In some embodiments, the protective cover 300 is connected to the second connector 200. Optionally, the inner wall of the protective cover 300 is provided with a plurality of positioning ribs, and the outer wall of the second connector is provided with a plurality of positioning grooves. The positioning ribs cooperate with the positioning grooves to realize the connection between the protective cover 300 and the second connector 200. Of course, there are other ways to connect the protective cover 300 and the second connector 200, which are not limited here.

[0054] Optionally, the inner wall of the protective cover 300 is greater than or equal to 1 mm away from the second connector 200, so that sufficient installation space can be ensured between the protective cover 300 and the second connector 200.

[0055] Optionally, the protective cover 300 is higher than the first connector 100 by 3 mm or more, so as to ensure the sealing effect of the waterproof filler and thus ensure the waterproof effect of the connector assembly.

[0056] Please refer to Figure 4 Some embodiments of the present invention further provide a method for installing a connector assembly 10, the method comprising the following steps:

[0057] The protective cover 300 is mounted on the second connector 200;

[0058] The first connector 100 and the second connector 200 are matched to realize the electrical connection between the first terminal 110 and the second terminal 210, and the first connector 100 and the second connector 200 are at least partially accommodated in the accommodating cavity 301;

[0059] The waterproof filler is filled in the gap between the protective cover 300 and the first connector 100 and the second connector 200 .

[0060] This installation method can prevent impurities such as water vapor from entering the interior of the connector assembly, thereby preventing a short circuit between the first terminal and the second terminal. The installation is fast and reliable, saving installation costs and time while meeting waterproof requirements.

[0061] In some embodiments, before the first connector 100 is mated with the second connector 200 , the inner cavity 203 of the second housing 201 is at least partially filled with a waterproof filler, thereby further reducing the risk of impurities such as water vapor intruding into the connector assembly 10 .

[0062] Please refer to Figures 5 to 11 Some embodiments of the present invention further provide a battery pack 5 that can be detachably connected to an electrical device, the battery pack 5 comprising: a housing 50; a battery cell group 55 housed in the housing 50, the battery cell group 55 comprising a plurality of battery cells 500 electrically connected to each other; an electrical connector 520 for inputting and / or outputting power to the electrical device, comprising at least one battery pack terminal 521, the battery pack terminal 521 being used to connect to a corresponding terminal of the electrical device; a control circuit board 530 electrically connected to the battery cell 500 and the electrical connector 520; the battery pack 5 also comprises at least one of the aforementioned connector 10, the connector 10 being electrically connected to the control circuit board 530.

[0063] By providing a connector assembly in the battery pack, the battery pack can be made compact while meeting the waterproof requirement, thereby being convenient for users to use and carry.

[0064] Optionally, the electrical device may be an electric tool, a household appliance, etc. When the battery pack is connected to the electric tool or the household appliance, the battery pack can provide electrical energy therefor. The electric tool may be a handheld electric tool, such as an electric hammer, an electric drill, an angle grinder, etc., or a garden electric tool, such as a hair dryer, a chain saw, an intelligent lawn mower, etc. The household appliance may be a vacuum cleaner, a mop, a fan, etc., and the present invention is not limited thereto.

[0065] Optionally, the electrical device may also be a charger. When the battery pack is connected to the charger, the charger connected to a power source can provide electrical energy to the battery pack.

[0066] In some embodiments, the housing 50 includes a first housing 51 and a second housing 52 that are oppositely disposed. The first housing 51 and the second housing 52 are assembled to form a receiving space for receiving the battery cell group 55 .

[0067] A pair of guide rails 510 are provided on the housing 50 , and the pair of guide rails 510 are used to guide the battery pack 5 to be mechanically connected to the electrical device, so that the battery pack 5 can be detachably installed on the electrical device.

[0068] like Figure 5 and Figure 7 As shown, the housing 50 is provided with a plurality of terminal grooves 511, and the battery pack terminals 521 are at least partially received in the corresponding terminal grooves 511. When the battery pack 5 is connected to the electrical device, the battery pack terminals 521 are plugged into the corresponding terminals of the electrical device, thereby realizing the electrical connection between the battery pack 5 and the electrical device. Optionally, a pair of guide rails 510 and a plurality of terminal grooves 511 are provided on the second housing 52.

[0069] like Figure 5 As shown, a locking member 580 is provided on the housing 50 , and the locking member 580 is used to cooperate with a corresponding component provided on the electrical device, so as to achieve locking of the battery pack 5 and the electrical device. Optionally, the locking member 580 is provided as a groove located between the pair of guide rails 510 .

[0070] Optionally, the battery cell 500 is a bag-shaped battery cell, and the battery cell 500 can be bent into an arc shape. In other embodiments, the battery cell 500 can also be configured as a blade battery cell or a square shell battery cell.

[0071] Optional, such as Figure 7 As shown, the battery cells 500 are stacked in the up and down directions, the number of battery cells 500 is 15, the nominal voltage of each battery cell 500 is 4V, and the battery cells 500 are connected in series, so that the nominal voltage of the battery pack 5 reaches 60V to support the operation of high-power electrical equipment.

[0072] Please refer to Figure 8 The battery cell 500 is configured as a bag-shaped battery cell, and the battery cell 500 includes a battery cell body 501 and a battery cell electrode 503 located at the end of the battery cell body 501. The battery cell body 501 is used to store chemical substances that generate electrical energy, and the battery cell electrode 503 is used to allow the battery cell 100 to input or output electrical energy. The battery cell body 501 includes a packaging film (not shown), which is used to package the battery cell 500 to prevent the chemical substances in the battery cell 500 from leaking. Optionally, the packaging film is configured as an aluminum-plastic film.

[0073] Furthermore, the battery cell electrode 503 includes a positive terminal 503 a and a negative terminal 503 b. Optionally, the positive terminal 503 a and the negative terminal 503 b are disposed opposite to each other along the longitudinal direction of the battery cell 500.

[0074] like Fig. 9 As shown, multiple battery cells 500 are stacked and arranged, and the battery cell electrodes 503 of adjacent battery cells 500 are welded to each other. Optionally, the battery cell electrodes of adjacent battery cells 500 at the same end have opposite polarities, and the battery cell electrodes of adjacent battery cells 500 are overlapped and welded to achieve series connection between the battery cells 500, and so on to complete the electrical connection of all battery cells 500. Of course, the arrangement and connection between the battery cells can also be completed in other ways, and the present invention is not limited to this.

[0075] Please refer to Figure 7 and Fig. 9 The battery cell group 55 further includes a plurality of stacked support members 550, each support member 550 being used to support a battery cell 500, so that the battery cell 500 is stably supported. The plurality of support members 550 are stacked in the up-down direction, each support member 550 is engaged with each other, and a long bolt 551 is passed through a screw column 552 provided on each support member 550, so as to achieve a stable connection between the plurality of support members 550.

[0076] Please refer to Figure 7 The control circuit board 530 is provided with a power management module for controlling the charging and / or discharging of the battery pack 5. Optionally, the control circuit board 530 is arranged in the up-down direction relative to the battery pack 55.

[0077] like Fig.10 and Fig.11 As shown, the battery pack 5 further includes a packaging box 531, and the control circuit board 530 is at least partially contained in the packaging box 531. The control circuit board 530 is at least partially covered by a sealant (not shown) to prevent water from entering the control circuit board 530 and causing a short circuit. Optionally, the sealant is made of insulating material.

[0078] In some embodiments, Figure 7 As shown, the battery pack 5 also includes a signal acquisition board 540 for collecting electrical parameters of the battery cell 500, and the electrical parameters of the battery cell 500 include one or more parameters such as temperature, voltage, and current of the battery cell 500. The signal acquisition board 540 is provided with a signal acquisition line (not shown) electrically connected to the battery cell 500, and the signal acquisition line is connected to the battery cell electrode 503, so as to collect information of the battery cell 500.

[0079] Optionally, the signal acquisition board 540 is arranged adjacent to the cell electrode 503, which is convenient for wiring arrangement and is beneficial for assembly of the battery pack. Furthermore, since the positive terminal 503a and the negative terminal 503b are arranged opposite to each other along the longitudinal extension direction of the cell 500, the signal acquisition board 540 needs to connect the positive terminal 503a and the negative terminal 503b, so the signal acquisition board 540 is arranged in two pieces, which are arranged on both sides of the longitudinal extension direction of the cell 500.

[0080] Optionally, the signal acquisition board 540 is extended along the up-down direction and fixedly connected to the support member 550 .

[0081] In some embodiments, Figure 7 As shown, the battery pack 5 further includes a power display panel 560 for displaying the power of the battery pack. Optionally, the power display panel 560 is arranged at an angle to the control circuit board 530. Optionally, the power display panel 560 is arranged at an acute angle to the control circuit board 530.

[0082] The power display panel 560 is provided with an indication button and a plurality of power indicator lights. After the user presses the indication button, the user can judge the remaining power of the battery pack according to the display of the power indicator lights. Optionally, the power display panel 560 is located above the battery pack 55.

[0083] Further, the second connector 200 and the protective cover 300 are arranged on the control circuit board 530. Optionally, the second connector 200 is welded on the control circuit board 530.

[0084] In some embodiments, when installing the battery pack 5, the protective cover 300 is first placed on the control circuit board 530, and then the control circuit board 530 is at least partially covered with a sealant. Fig.11 As shown, a groove 310 is provided between the protective cover 300 and the control circuit board 530 , and the sealant flows into the receiving cavity 301 through the groove 310 , so as to fix the protective cover 300 with the sealant. Further, the groove 310 is provided at the bottom of the protective cover 300 .

[0085] In some embodiments, when installing the battery pack 5, the control circuit board 530 is first at least partially covered with sealant, and then the protective cover 300 is placed on the control circuit board 530. Finally, glue is applied between the protective cover 300 and the control circuit board 530 so that the bottom surface of the protective cover 300 and the sealant are adhered by the glue to fix the protective cover 300.

[0086] Fig.10 and Fig.11 Schematic diagrams showing the second connector 200 provided on the control circuit board 530 without and with the protective cover respectively.

[0087] In some embodiments, Figure 7 and Fig.10 As shown, the second connector 200 a is matched with the first connector 100 a , and the first connector 100 a is electrically connected to the battery pack terminal 521 through the cable 533 , thereby realizing the electrical connection between the battery pack terminal 521 and the control circuit board 530 .

[0088] In some embodiments, the first connector 200b is mated with the first connector (not shown), and the first connector is electrically connected to the power display board 560 through a first wiring harness (not shown) to achieve electrical connection between the power display board 560 and the control circuit board 530.

[0089] In some embodiments, the first connectors 200c and 200d are respectively matched with two first connectors (not shown), and the two first connectors are respectively electrically connected to two signal acquisition boards 540 to achieve electrical connection between the signal acquisition board 540 and the control circuit board 530.

[0090] Optionally, in order to save cost and space, the protective sleeve is provided on at least two second connectors, and at least two connector components share one protective sleeve. Fig.11 As shown, the second connectors 200a and 200b are arranged adjacent to each other, the second connectors 200c and 200d are arranged adjacent to each other, the protective cover 300 is sleeved on the two second connectors 200a and 200b, and the protective cover 300' is sleeved on the two second connectors 200c and 200d.

[0091] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A connector assembly, comprising a first connector and a second connector that are mated with each other, wherein the first connector comprises a first housing and a first terminal that is at least partially accommodated in the first housing, and the second connector comprises a second housing and a second terminal that is at least partially accommodated in the second housing, wherein the first terminal and the second terminal are mated with each other to achieve electrical connection, characterized in that: The connector assembly also includes a protective cover, which is sleeved on the second connector. The protective cover encloses a receiving cavity, and the first connector and the second connector are at least partially received in the receiving cavity. A waterproof filler is provided in the gap between the protective cover and the first connector and the second connector.

2. The connector assembly according to claim 1, characterized in that: The inner cavity of the second shell is at least partially filled with the waterproof filler.

3. The connector assembly according to claim 1, characterized in that: The first connector also includes a first wire harness connected to the first housing, the first wire harness is used to be electrically connected to the first terminal, and the waterproof filler is arranged at the joint between the first wire harness and the first housing and at least partially wraps the first wire harness.

4. The connector assembly according to claim 1, characterized in that: The protective cover is higher than the first connector by more than or equal to 3 mm.

5. The connector assembly according to claim 1, characterized in that: The waterproof filler includes silicone grease.

6. A method for installing a connector assembly, characterized in that: The connector assembly comprises a protective cover and a first connector and a second connector which are detachably matched, the protective cover encloses a receiving cavity, the first connector comprises a first housing and a first terminal which is at least partially received in the first housing, the second connector comprises a second housing and a second terminal which is at least partially received in the second housing, and the installation method comprises the following steps: Putting a protective cover on the second connector; The first connector is matched with the second connector to realize the electrical connection between the first terminal and the second terminal, and the first connector and the second connector are at least partially accommodated in the accommodating cavity; A waterproof filler is filled in the gap between the protective sleeve and the first connector and the second connector.

7. The installation method according to claim 6, characterized in that: Before the first connector is mated with the second connector, the inner cavity of the second housing is at least partially filled with the waterproof filler.

8. A battery pack capable of being detachably connected to an electrical device, comprising: case; A battery cell group is accommodated in the housing, and the battery cell group includes a plurality of battery cells electrically connected to each other; an electrical connector for inputting and / or outputting power to the electrical device, comprising at least one battery pack terminal, the battery pack terminal being configured to be connected to a corresponding terminal of the electrical device; A control circuit board, electrically connected to the battery cell and the electrical connector; It is characterized in that the battery pack also includes at least one connector assembly according to any one of claims 1-7, and the connector assembly is electrically connected to the control circuit board.

9. The battery pack according to claim 8, characterized in that: The second connector and the protective cover are arranged on the control circuit board.

10. The battery pack according to claim 9, characterized in that: The battery pack further includes a packaging box, in which the control circuit board is at least partially accommodated, and the control circuit board is at least partially covered by a sealant.

11. The battery pack according to claim 10, characterized in that: A groove is provided between the protective cover and the control circuit board, and the sealant flows into the receiving cavity through the groove.

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