Plug and lithium ion battery pack

Abstract

The utility model relates to the field of application connection of lithium ion batteries, in particular to a plug and a lithium ion battery pack. The plug comprises an insulating base, the front end of the insulating base is provided with a cavity with an opening in the front end, the rear end of the insulating base is provided with at least three jacks, the front end socket of each jack is communicated with the cavity, and the rear end socket of each jack is located on the rear end face of the insulating base. A plurality of jacks are arranged in the cavity, conductive connectors are respectively fixed in the jacks, two of the conductive connectors are power connectors, at least one of the conductive connectors is a voltage sampling connector, and the front ends of the conductive connectors jointly extend out of the cavity and are used for being connected with the conductive connector of an opposite-end plug in an inserted mode. The rear end of each conductive connector extends out of the rear end of the insulating base, or the rear end of each conductive connector is connected with a conductive wire, and each conductive wire extends out of the rear end of the insulating base.

Description

Technical Field

[0001] The utility model relates to the application connection field of lithium ion batteries, in particular to a plug and a lithium ion battery pack. Background Art

[0002] With the increasingly wide application of lithium ion battery devices, more and more devices use lithium ion batteries. People's requirements for the connection device between the lithium ion battery and the device, and for the connection device between the battery and the charger are gradually increasing, and the requirements are becoming more and more flexible.

[0003] At present, the battery packs on the market are respectively provided with a discharge plug and a charging line plug. When charging, the charging power supply is plugged into the charging plug. When discharging, the power plug of the electrical device is plugged into the discharge plug. The inventor found in the research process of the present utility model that the prior art has the defects of inconvenient plugging and unplugging of the plug and too large occupied space. Summary of the Invention

[0004] One of the purposes of the embodiments of the present utility model is to provide a plug and a lithium ion battery pack. Applying this technical solution is beneficial to improving the universality and compatibility of the plug of the battery pack and facilitating the application of users.

[0005] In the first aspect, a plug provided by an embodiment of the present utility model includes:

[0006] An insulating base, with a chamber having an open front end provided at the front end of the insulating base,

[0007] At least three jacks are respectively provided at the rear end of the insulating base, the front sockets of each jack are respectively communicated with the chamber, and the rear sockets are respectively located on the rear end face of the insulating base,

[0008] Each jack is internally fixed with a conductive connector, two of the conductive connectors are power supply connectors, and at least one of the conductive connectors is a voltage sampling connector,

[0009] The front ends of each conductive connector jointly extend into the chamber for plugging and unplugging with the conductive connectors of the opposite plug,

[0010] The rear ends of each conductive connector extend out of the rear end of the insulating base, or the rear ends are connected to conductive wires, and each conductive wire extends out of the rear end of the insulating base.

[0011] Optionally, a clamping portion is respectively formed at the rear end of each conductive connector, and each clamping portion respectively clamps and fixes the exposed conductive wire cores at the front ends of each conductive wire, and the rear ends of each conductive wire extend out of the insulating base,

[0012] The front ends of each conductive connector are respectively solid conductive strips or inserts.

[0013] Optionally, the end of each of the conductive inserts is a pointed portion.

[0014] Optionally, lateral snap portions are respectively provided on the sides of the middle portions of the conductive connectors.

[0015] Inverted hanging positions are respectively provided on the hole walls of the jacks.

[0016] Each of the lateral snap portions of each of the conductive connectors is respectively limited within the inverted hanging position of the jack where it is located.

[0017] Optionally, guiding positions are respectively provided on the hole walls of the jacks. The guiding positions are located at the rear ends of the inverted hanging positions and at the front ends of the rear end sockets. The side where the guiding positions are located is opposite to the side where the inverted hanging positions are located.

[0018] At the guiding positions, in the direction from back to front, the distance from the hole wall at the guiding position to the hole wall at the opposite end gradually decreases.

[0019] When each of the lateral snap portions on each of the conductive connectors does not reach the inverted hanging position, each of the guiding positions is in close contact with each of the conductive connectors. Under the extrusion of each of the guiding positions, each of the conductive connectors elastically deforms, causing each of the guiding positions to move towards each of the inverted hanging positions until each of the lateral snap portions is respectively limited within each of the inverted hanging positions, and each of the conductive connectors elastically returns to its natural state.

[0020] Optionally, plugging and unplugging handgrip portions are provided on at least two opposite sides of the lateral side of the insulating base.

[0021] Optionally, convex and / or concave snap hanging positions are further provided on the inner wall of the chamber for snap connection with the snap hanging positions on the outer wall of the mating male plug.

[0022] Optionally, at least one protruding marking portion is further provided on the rear end face of the insulating base.

[0023] Optionally, the centers of any three of the conductive connectors are located on two different straight lines.

[0024] In a second aspect, an embodiment of the present invention provides a lithium-ion battery pack, including:

[0025] A lithium-ion battery pack body, including at least two lithium-ion battery cells electrically connected in series or in parallel or in a combination of both.

[0026] A charge and discharge protection module, including:

[0027] A discharge circuit, electrically connected to the positive electrode and the negative electrode of the lithium-ion battery pack body.

[0028] A charging circuit, electrically connected to the positive and negative electrodes of each of the lithium-ion battery cells.

[0029] A sampling circuit, electrically connected to the electrical node between the two lithium-ion battery cells within the lithium-ion battery pack.

[0030] A control circuit, electrically connected to the discharging circuit, the charging circuit, and the sampling circuit respectively.

[0031] At least one plug as described above, the rear end of the voltage sampling connector of the plug is electrically connected to the sampling circuit, and the plug is used for a discharging output plug and / or a charging input plug.

[0032] As can be seen from the above, on the plug of the lithium-ion battery in this embodiment, independent charging sockets and discharging sockets are integrated. Moreover, the charging socket and the discharging socket are independent of each other and can be respectively plugged into the existing separate charging plug and the existing separate discharging plug alone, or can be plugged into the plug integrated with the charging plug and the discharging plug that matches the plug of this embodiment. At this time, for the further application principle, please refer to the corresponding description of the lithium-ion battery with the plug of this embodiment later. Brief Description of the Drawings

[0033] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not constitute an improper limitation to the present invention.

[0034] Figure 1 Schematic perspective view of the plug provided in the first embodiment of the present invention.

[0035] Figure 2 Exploded perspective view of the plug provided in the first embodiment of the present invention.

[0036] Figure 3 Front view of the plug provided in the first embodiment of the present invention.

[0037] Figure 4 Left view of the plug provided in the first embodiment of the present invention.

[0038] Figure 5 Right view of the plug provided in the first embodiment of the present invention.

[0039] Figure 6 B-B sectional view of the plug provided in the first embodiment of the present invention.

[0040] Figure 7 Schematic view of the structure of the two plugs plugged together provided in the first and second embodiments of the present invention.

[0041] Figure 8Schematic cross-sectional structure diagram of the plug provided in the second embodiment of the present utility model;

[0042] Figure 9 Schematic circuit principle diagram of the battery pack with a charging and discharging plug provided in the first and second embodiments of the present utility model;

[0043] Figure 10 Schematic three-dimensional structure diagram of the plug provided in the second embodiment of the present utility model;

[0044] Figure 11 Another schematic three-dimensional structure diagram of the plug provided in the second embodiment of the present utility model;

[0045] Figure 12 Schematic assembly structure diagram of the plug provided in the second embodiment of the present utility model;

[0046] Figure 13 Schematic front view structure diagram of the plug provided in the second embodiment of the present utility model;

[0047] Figure 14 Schematic left view structure diagram of the plug provided in the second embodiment of the present utility model;

[0048] Figure 15 Schematic right view structure diagram of the plug provided in the second embodiment of the present utility model;

[0049] Figure 16 Schematic cross-sectional structure diagram of two plugs being plugged together provided in the first and second embodiments of the present utility model.

[0050] 1: Insulating base; 11: Plug-in end; 12: Plugging and unplugging handgrip; 14: Jack; 15: Rib; 17: Hanging position; 18: Chamber; 19: Introduction position;

[0051] 13: First side window; 16: Snap hook position;

[0052] 2: Conductive female plug-in member; 22: Metal jack; 23: Gap; 25: Second metal member;

[0053] 26: Bent part; 27: Second side window;

[0054] 3: Conductive wire; 31: Conductive wire core;

[0055] 4: Conductive male plug-in member; 21: Clamping part; 42: Tip; 43: Side snap part. Detailed implementation manners

[0056] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but not to limit the present utility model. Embodiment

[0057] See Figure 1-7 as shown in FIGS. 15 and 16.

[0058] This embodiment provides a plug, which mainly includes an insulating base 1 and at least three conductive connectors. The conductive connectors can be either male or female. In this embodiment, the conductive male connector 4 is taken as an example for illustration.

[0059] The section of the insulating base 1 near the front end is a plugging end for plugging with the female plug at the opposite end, which is an insulating male plug; the rear end is a plugging and holding part 12 for the user to hold for plugging and unplugging operations. The middle and rear ends of each conductive male connector 4 are fixed in the middle or rear section of the insulating base 1.

[0060] A chamber 18 with a front opening is provided at the front end of the insulating base 1, and a jack 14 is provided at the rear end of the insulating base 1. The number of jacks 14 is the same as the number of conductive male connectors 4. Each conductive male connector 4 is respectively fixed in each jack 14.

[0061] Among them, two conductive male connectors 4 are power connectors, and at least one of the other conductive male connectors 4 is a voltage sampling connector.

[0062] The front sockets of each jack 14 are respectively located on the rear end face of the chamber 18 and communicate with the chamber 18, and the rear sockets are respectively located on the rear end face of the insulating base 1.

[0063] A conductive male connector 4 is respectively fixed in each jack 14. Among them, two conductive male connectors 4 are power connectors, and at least one of the other conductive male connectors 4 is a voltage sampling connector.

[0064] The front ends of each conductive male connector 4 are jointly located in the chamber 18 at the front end of its corresponding jack 14 and do not protrude beyond the chamber 18. There is a gap between each conductive male connector 4 to ensure electrical isolation; there is a certain gap between each conductive male connector 4 and the inner wall of the chamber 18 for plugging with the male plug at the opposite end. Each conductive male connector 4 on this plug is inserted into the jack 14 of the male plug at the opposite end, and is inserted into the jack 14 of the conductive female connector in each jack 14 to achieve electrical connection.

[0065] The rear ends of each conductive male connector 4 protrude from the rear end of the insulating base 1, or their rear ends are respectively connected to conductive wires, and the formed wire harness extends out from the rear end of the insulating base 1 to be electrically connected to the battery pack.

[0066] When applying the plug of this embodiment to a lithium-ion battery pack, specifically, the battery pack includes a lithium-ion battery pack body and a charge and discharge protection module.

[0067] Among them, the lithium-ion battery pack body includes a plurality of lithium-ion battery cells. The lithium-ion battery cells are electrically connected in series, in parallel, or in a combination of series and parallel, and the whole provides current externally.

[0068] The charge and discharge protection module includes a discharge circuit, a charging circuit, a sampling circuit, and a control circuit.

[0069] The input end of the discharge circuit is electrically connected to the total positive “+” and total negative “-” of the battery pack body, and the output end is electrically connected to the conductive plug-in male part 4 of the power output interface of the battery pack (which can be realized by using the plug of this embodiment but is not limited to this). The lithium-ion battery pack discharges and outputs current to drive external electrical equipment.

[0070] The input end of the charging circuit is electrically connected to the rear end of the conductive plug-in male part 4 serving as the charging interface (which can be realized by using the plug of this embodiment but is not limited to this), and the output end is electrically connected to the positive “+” and negative “-” of each battery cell respectively to charge each battery cell in the lithium-ion battery pack with the current from the charging power supply.

[0071] The sampling circuit is electrically connected to the electrical node between at least two adjacent battery cells, samples the voltage of this electrical node, outputs it to the control circuit, and outputs it to the plug of this embodiment as the voltage sampling plug-in male part, so that the plug of this embodiment can output the voltage sampler to the electrical equipment and / or charging power supply connected to the opposite-end plug, and the external electrical equipment or charging power supply can further control the input of the discharge current and / or the output of the charging current according to this voltage sampling value, further improving the electrical safety and extending the service life of the lithium-ion battery pack.

[0072] When the plug of this embodiment is used as the discharge output plug of the lithium-ion battery pack, the two conductive plug-in male parts 4 serving as the power connectors are electrically connected to the total positive “+” and total negative “-” of the battery pack respectively to output power to the external electrical equipment. Compared with the prior art, adopting the technical solution of this embodiment, when the lithium-ion battery pack discharges, in addition to providing the voltage between the total positive “+” and total negative “-” externally through the two power connectors, the plug of this embodiment serving as the power output interface further outputs other sampling voltages to the opposite-end plug through the sampling plug-in male part, so that the electrical equipment end can further control the current output according to this sampling voltage, further improving the electrical safety.

[0073] When the plug of this embodiment is used as the charging input plug of a lithium-ion battery pack, the two conductive male plug members 4 serving as the power output connectors are respectively electrically connected to the positive electrode “+” and negative electrode “-” of each lithium-ion battery cell of the battery pack. The plug of the charging power source is plugged into the plug of this embodiment, and the current input by the charging power source is respectively input to each lithium-ion battery cell to charge each cell. Compared with the prior art, adopting the technical solution of this embodiment, when an external charging power source charges the lithium-ion battery pack of this embodiment, the plug of this embodiment further outputs a sampling voltage to the charging power source through at least the voltage sampling male plug member, so that the charging power source can further control the output of the charging current according to the sampling voltage. When an abnormality occurs in the battery pack, the output of the charging current is stopped on the charger side to avoid further abnormalities and cause a charging safety accident. It can be seen that adopting the technical solution of this embodiment is beneficial to further improving the charging safety of the lithium-ion battery pack and extending the service life of the battery pack.

[0074] The plug of this embodiment can be used as the discharge plug of a lithium-ion battery pack, can also be used as the charging plug of a lithium-ion battery pack, and can also select two plugs with the structure of this embodiment respectively as the discharge plug and charging plug of the lithium-ion battery pack.

[0075] In addition, the structure of the plug of this embodiment is simple, which is beneficial to the miniaturized design of the battery pack plug.

[0076] For example, at least three conductive male plug members 4 are provided on the plug of this embodiment. It can, but is not limited to, adopt a staggered arrangement design instead of a row-by-row arrangement structure, that is, the centers of any three conductive male plug members 4 are not on the same straight line but on two different straight lines. Taking the example of having three conductive male plug members 4, it can, but is not limited to, adopt a “pin” shape structure to make full use of the space of the insulating base 1 to achieve the miniaturized design of the plug.

[0077] As an illustration of this embodiment, in this embodiment, the front ends of each conductive male plug member 4 are respectively located within their corresponding jacks 14 without protruding beyond the front socket, so as to improve the moisture-proof and dust-proof effects.

[0078] As an illustration of this embodiment, a clamping portion 21 is respectively formed at the rear end of each conductive male plug member 4 of this embodiment. Each clamping portion 21 can, but is not limited to, be formed by bending a sheet of metal at the rear end of the conductive male plug member 4. The bare wire cores 31 at the front ends of a conductive wire 3 are respectively tightly clamped by each clamping portion 21, and each conductive wire 3 extends from the rear end of the insulating base 1 to be electrically connected to the charge and discharge protection module of the battery pack.

[0079] At the front end of each conductive male connector 4 are solid conductive inserts or blades for making electrical connections by plugging into the mating female connector of the opposite end. As an illustration of this embodiment, it is preferred to design the tip 42 at the front end of each conductive insert to have a gradually decreasing thickness or diameter.

[0080] As an illustration of this embodiment, an inverted position 17 is also provided on the inner wall of the socket 14 of the insulating base 1. The inverted position 17 can, but is not limited to, protrude relative to the inner wall, and the protrusion has a gentle or straight slope change. During installation, the conductive male connector 4 with the conductive wire 3 clamped at the rear end is inserted into each socket 14 from the rear socket of the insulating base 1. When inserted to a certain extent, the lateral locking portion 43 on the conductive male connector 4 is locked and snapped into the inverted position 17 on the inner wall of the socket 14, and the conductive male connector 4 is positioned within the inverted position 17 and cannot move back and forth. The front end of the conductive male connector 4 extends out from the front socket of the socket 14 and is located within the chamber 18 at the front end of the insulating base 1. The use of the lateral locking portion 43 and the inverted position 17 is beneficial for precise positioning and assembly, improving the assembly efficiency and effect. And with this design, when plugging and unplugging with an external plug, it is not easy to displace due to the plugging and unplugging force, which is beneficial for providing the durability of the product.

[0081] As an illustration of this embodiment, guiding positions 19 are respectively provided on the inner walls of the sockets 14. The guiding positions 19 are located at the rear of the inverted position 17 of the socket 14 and at the front of the rear socket of the socket 14, and the guiding positions 19 are located on the side opposite to the side where the inverted position 17 is located.

[0082] Taking the inverted position 17 as a lateral recess and the inverted position 17 being located on the lower inner wall of the socket 14 as an example, the guiding position 19 is located on the upper inner wall of the socket 14, and in the direction from the rear to the front, the distance between the inner wall at the guiding position 19 and the opposite inner wall gradually becomes narrower, so that when the conductive male connector 4 is inserted into the socket 14, the lateral locking portion 43 of the conductive male connector 4 faces downward, the conductive male connector 4 enters from the rear socket 14, passes through the guiding position 19 on the inner wall, and under the squeezing and guiding action of the guiding position 19, the conductive male connector 4 elastically deforms and offsets towards the inner wall side where the inverted position 17 is provided until the lateral locking portion 43 on the metal connector enters the inverted position 17 on the inner wall, and the conductive male connector 4 elastically returns to its natural state and is positioned here.

[0083] As can be seen from the above, the use of the guiding position 19 is beneficial for the accurate positioning and assembly of the conductive male connector 4 and improves the work efficiency. As an illustration of this embodiment, the front end section of the conductive male connector 4 can, but is not limited to, be designed as a flat metal strip, and the lateral locking portion 43 is provided on the lower surface of the flat metal strip.

[0084] As an illustration of this embodiment, an insertion and extraction hand-holding portion 12 is provided on the outer side of the rear end of the insulating base 1. For example, it can be, but is not limited to, provided on the top and bottom surfaces, or can also surround the outer periphery of the side surface of the insulating base 1. The insertion and extraction hand-holding portion 12 can be set as a concave position convenient for finger positioning and hand-holding, and ribs 15 can also be provided on the surface of the concave position. The ribs 15 can be in strip or mesh shape. Adopting this design is beneficial to improving the convenience of user insertion and extraction operations, enhancing the usability, and preventing hand slippage during the insertion and extraction process.

[0085] As an illustration of this embodiment, a buckle hanging position (not shown in the figure) is also provided on the outer side surface of the plug-in section near the front end of the insulating base 1. When the plug of this embodiment is plugged into an external female plug, the buckle hanging position on the outer side surface of this plug is mutually limited and matched with the buckle hanging position on the inner wall of the cavity 18 of the mating female plug for buckle connection, preventing loosening, ensuring reliable plugging, and adopting this buckle hanging position design is also beneficial to preventing reverse plugging and ensuring the safety of electrical connection.

[0086] As an illustration of this embodiment, a raised marking portion is also provided on the rear end face of the insulating base 1, such as the positive pole "+", negative pole "-", and the marking "Link" for identifying the voltage sampling connector in the middle. Each marking portion is integrally injection-molded with the insulating base 1. Embodiment

[0087] See Figure 7-16 as shown.

[0088] This embodiment provides a plug, which mainly includes an insulating base 1 and at least three conductive connectors. The conductive connectors can be either male or female. This embodiment takes the conductive female connector 2 as an illustration.

[0089] The insulating base 1 is the hand-holding portion of the plug and the mounting base for each conductive female connector 2. Taking the plug-in end 11 of the insulating base 1 for mating with other plugs as the front end, the end opposite to the plug-in end 11 is denoted as the rear end. The front portion of the insulating base 1 is an insulating male plug for mating with a female plug.

[0090] Insertion holes 14 are provided in the insulating base 1. The front sockets of each insertion hole 14 are respectively located on the front end face of the insulating base 1, and the rear sockets are respectively located on the rear end face of the insulating base 1. The number of insertion holes 14 is the same as the number of conductive female connectors 2, and each conductive female connector 2 is fixedly arranged in each insertion hole 14. Two of the conductive female connectors 2 are power connectors, and at least one of the other conductive female connectors 2 is a voltage sampling connector.

[0091] The front end of each conductive socket female part 2 is located within the front socket of its corresponding socket 14 and does not extend beyond the front socket. When mating with an external female plug, the front end of the male plug in this embodiment is inserted into the cavity of the external female plug, and the conductive male part located within the cavity of the external female plug is inserted into each socket 14 and then into the conductive socket female part 2 of the plug in this embodiment to achieve electrical connection and mating between the connectors.

[0092] The middle part of each conductive socket female part 2 is fixed within the insulating base 1, and the rear end extends out of the rear end of the insulating base 1, or conductive wires 3 are respectively connected to the rear ends, and the bundles of conductive wires 3 extend out from the rear end of the insulating base 1. When applying the plug in this embodiment to a lithium-ion battery, the conductive wires 3 can be electrically connected to the lithium-ion battery pack.

[0093] When applying the plug in this embodiment to a lithium-ion battery pack, specifically, the battery pack includes a lithium-ion battery pack body and a charge-discharge protection module.

[0094] Among them, the lithium-ion battery pack body includes a plurality of lithium-ion battery cells. The lithium-ion battery cells are electrically connected in series or in parallel or in a combination of series and parallel, and provide current externally as a whole.

[0095] The charge-discharge protection module includes a discharge circuit, a charging circuit, a sampling circuit, and a control circuit.

[0096] The input end of the discharge circuit is electrically connected to the total positive “+” and total negative “-” of the battery pack body, and the output end is electrically connected to the conductive connector of the power output interface of the battery pack (which can be but is not limited to being implemented by the plug in this embodiment). The lithium-ion battery pack discharges and outputs current to drive external electrical devices.

[0097] The input end of the charging circuit is electrically connected to the rear end of the conductive connector serving as the charging interface (which can be but is not limited to being implemented by the plug in this embodiment), and the output end is respectively electrically connected to the positive “+” and negative “-” of each battery cell to charge each battery cell in the lithium-ion battery pack with the current from the charging power source.

[0098] The sampling circuit is electrically connected to the electrical node between at least two adjacent battery cells, samples the voltage of this electrical node, and outputs it to the control circuit and to the voltage sampling socket female part on the plug in this embodiment, so that the plug in this embodiment can output the voltage sampler to the electrical device and / or the charging power source connected to the mating opposite-end plug, and the external electrical device or the charging power source can also control the input of the discharge current and / or the output of the charging current according to this voltage sampling value, further improving the electrical safety and extending the service life of the lithium-ion battery pack.

[0099] When the plug of this embodiment is used as the discharge output plug of a lithium-ion battery pack, the two conductive female plug parts 2 serving as power connectors are respectively electrically connected to the total positive “+” and total negative “-” of the battery pack, and output power to external electrical equipment. Compared with the prior art, adopting the technical solution of this embodiment, when the lithium-ion battery pack discharges, in addition to providing the voltage between the total positive “+” and total negative “-” to the outside through the two power connectors, the plug of this embodiment serving as the power output interface further outputs other sampling voltages to the opposite plug through the sampling female plug part, so that the electrical equipment side can further control the current output according to the sampling voltage, further improving the electrical safety.

[0100] When the plug of this embodiment is used as the charging input plug of a lithium-ion battery pack, the two conductive female plug parts 2 serving as power output connectors are respectively electrically connected to the positive “+” and negative “-” of each lithium-ion battery cell of the battery pack. The plug of the charging power supply is plugged into the plug of this embodiment, and the current input by the charging power supply is respectively input to each lithium-ion battery cell to charge each cell. Compared with the prior art, adopting the technical solution of this embodiment, when an external charging power supply charges the lithium-ion battery pack of this embodiment, the plug of this embodiment further outputs a sampling voltage to the charging power supply through at least the voltage sampling female plug part, so that the charging power supply can further control the charging current output according to the sampling voltage. When the battery pack is abnormal, the charging current output is stopped on the charger side to avoid further abnormalities and cause charging safety accidents. It can be seen that adopting the technical solution of this embodiment is beneficial to further improving the charging safety of the lithium-ion battery pack and extending the service life of the battery pack.

[0101] The plug of this embodiment can be used as the discharge plug of a lithium-ion battery pack, or as the charging plug of a lithium-ion battery pack, or two plugs with the structure of this embodiment can be selected respectively as the discharge plug and charging plug of the lithium-ion battery pack.

[0102] In addition, the structure of the plug of this embodiment is simple, which is beneficial to the miniaturized design of the battery pack plug.

[0103] For example, at least three conductive female plug parts 2 are provided on the plug of this embodiment. It can be but is not limited to arranging them in a staggered manner instead of using a row-by-row arrangement, that is, the centers of any three conductive female plug parts 2 are not on the same straight line, but on two different straight lines. Taking the example of having three conductive female plug parts 2, it can be but is not limited to arranging the three conductive female plug parts 2 in a “pin” shape, so as to make full use of the space of the insulating base 1 and realize the miniaturized design of the plug.

[0104] As an illustration of this embodiment, in this embodiment, the front ends and ends of each conductive female plug part 2 are respectively located within their corresponding jacks 14 without exceeding the front socket, so as to improve the moisture-proof and dust-proof performance of the plug.

[0105] As an illustration of this embodiment, a clamping portion 21 is respectively formed at the rear end of each conductive socket female member 2 of this embodiment. Each clamping portion 21 can be formed by bending a sheet-like metal at the end, but is not limited thereto. An exposed wire core 31 at the front end of a conductive wire 3 is tightly clamped within each clamping portion 21. Each conductive wire 3 extends out from the rear end of the insulating base 1 to be electrically connected to the charge and discharge protection module of the battery pack.

[0106] A metal jack 22 with an opening facing forward is respectively formed at the front end of each conductive socket female member 2 for a conductive socket male member on an external female plug to be inserted therein to achieve electrical connection. Each metal jack 22 can be formed by bending a first metal member (such as, but not limited to, a metal sheet) located at the front end. The two ends of the bent first metal member do not closely adhere and fix, but instead leave a certain gap 23 facing each other. This gap 23 is parallel to the axial direction of the metal jack 22, and the width of the gap 23 is the same everywhere. When the conductive socket male member of the external plug is inserted into the metal jack 22, the first metal member forming the metal jack 22 undergoes a slight elastic deformation, the gap 23 on the side of the metal jack 22 elastically increases slightly, and the inner wall of the metal jack 22 closely adheres between the outer wall of the inserted conductive socket male member and the jack 14 where the metal jack 22 of this embodiment is located, and thus it is not easy to become disengaged.

[0107] As an illustration of this embodiment, a bent second metal member 25 is further provided within each metal jack 22, such as, but not limited to, a metal strip or a metal sheet having the ability of elastic deformation. As an illustration of this embodiment, the front end of the second metal member 25 is fixed within the metal jack 22 or extends out of the metal jack 22 and is fixed on the insulating base 1. The middle section and the rear end of the second metal member 25 are both free ends and can elastically extend under pressure. When the conductive socket male member of the external plug is inserted into the metal jack 22 of the conductive socket female member 2 of this embodiment, the external conductive socket male member closely adheres to the bent second metal member 25 within the metal jack 22 and also closely adheres to at least one bent portion 26 of the second metal member 25. The external conductive socket male member has a radially outward pressure effect on the metal jack 22, causing the second metal member 25 to elastically deform. In addition to closely adhering to the inner wall of the metal jack 22, the inserted conductive socket male member also further closely adheres to at least one bent portion 26 of the second metal member 25, making it further not easy to become loose, which is beneficial to improving the plugging reliability between this plug and the external plug.

[0108] As an illustration of this embodiment, a lateral window portion (denoted as the first lateral window portion 13) can be further opened on the side of the jack 14 of the insulating base 1. Correspondingly, a second lateral window portion 27 is respectively opened on each metal jack 22. When each conductive socket female member 2 is respectively inserted into each jack 14 of the insulating base 1, each second lateral window portion 27 is respectively aligned with the first lateral window portion 13, forming a lateral window portion that communicates each metal jack 22 with the outside.

[0109] Furthermore, the end segments at the front ends of the respective second metal parts 25 located in the respective metal jacks 22 are also bent backward, forming an acute angle thereupon. The bent ends extend out from the second side window portion 27 and are positioned in front of the rear end face of the first side window portion 13, being in contact therewith or almost in contact therewith. Under the squeezing action of the inserted conductive male connector on the middle bent portion 26 of the second metal part 25, the end of the second metal part 25 abuts tightly against the rear end face of the first side window portion 13 for fixed positioning. The free end at the rear of the second metal part 25 extends backward, and the second metal part 25 undergoes elastic deformation and deflects toward the second side window portion 27. The inserted conductive male connector is tightly confined between the elastically deformed second metal part 25 and the metal jack 22, with close contact and being not prone to detachment, ensuring the reliability of the electrical connection.

[0110] The above-described embodiments do not constitute a limitation on the protection scope of the technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the above embodiments shall be included within the protection scope of the technical solution.

Claims

1. A plug, characterized in that it comprises: An insulating base, with a chamber having a front opening at the front end of the insulating base, At least three jacks are respectively provided at the rear end of the insulating base, and the front sockets of each jack communicate with the chamber respectively, and the rear sockets are respectively located on the rear end face of the insulating base, Each jack is internally fixed with a respective conductive connector, wherein two of the conductive connectors are power connectors, and at least one of the conductive connectors is a voltage sampling connector, The front ends of each conductive connector jointly extend into the chamber for plugging into the conductive connectors of the mating plug, The rear ends of each conductive connector extend out of the rear end of the insulating base, or the rear ends are connected to conductive wires, and each conductive wire extends out of the rear end of the insulating base.

2. The plug according to claim 1, characterized in that A clamping portion is respectively formed at the rear end of each conductive connector, and each clamping portion respectively clamps and fixes the bare conductive wire core at the front end of each conductive wire, and the rear ends of each conductive wire extend out of the insulating base, The front ends of each conductive connector are respectively solid conductive strips or inserts.

3. The plug according to claim 2, characterized in that The end of each conductive strip is a pointed portion.

4. The plug according to claim 1, characterized in that Lateral snap portions are respectively provided on the sides of the middle of each conductive connector, Inverted hanging positions are respectively provided on the inner walls of each jack, Each of the lateral snap portions of each conductive connector is respectively limited within the inverted hanging position of its corresponding jack.

5. The plug according to claim 4, characterized in that Guiding positions are respectively provided on the inner walls of each jack, the guiding positions are located at the rear end of the inverted hanging position and the front end of the rear socket, and the side where the guiding position is located is opposite to the side where the inverted hanging position is located, At the guiding position, in the direction from the rear to the front, the distance from the inner wall of the guiding position to the inner wall of the mating end gradually decreases, When each of the lateral snap portions on each conductive connector has not reached the inverted hanging position, each guiding position is in close contact with each conductive connector, and under the squeezing action of each guiding position, each conductive connector elastically deforms, causing each guiding position to move towards each inverted hanging position until each of the lateral snap portions is respectively limited within each inverted hanging position, and each conductive connector elastically returns to its natural state.

6. The plug according to claim 1, characterized in that Plugging and unplugging handholds are provided on at least two opposite sides of the insulating base.

7. The plug according to claim 1, characterized in that Protrusions and / or recessed snap hanging positions are further provided on the inner wall of the chamber for snap connection with the snap hanging positions on the outer wall of the mating male plug.

8. The plug according to claim 1, characterized in that At least one protruding identification portion is provided on the rear end face of the insulating base.

9. The plug according to claim 1, characterized in that The centers of any three of the conductive connectors are located on two different straight lines.

10. A lithium-ion battery pack, characterized in that, Comprising: A lithium-ion battery pack body, including at least two lithium-ion battery cells electrically connected in series or in parallel or in a combination of both; The charge and discharge protection module includes: A discharge circuit electrically connected to the positive and negative electrodes of the lithium-ion battery pack body. A charging circuit electrically connected to the positive and negative electrodes of each lithium-ion cell. A sampling circuit electrically connected to the electrical node between the two lithium-ion cells within the lithium-ion battery pack body. A control circuit electrically connected to the discharge circuit, the charging circuit, and the sampling circuit respectively. At least one plug according to any one of claims 1 to 9, the rear end of the voltage sampling connector of the plug is electrically connected to the sampling circuit, and the plug is used as a discharge output plug or a charging input plug.

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