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, at least three jacks are respectively arranged in the insulating base, front-end jacks of the jacks are respectively arranged on the front end face of the insulating base, rear-end jacks of the jacks are respectively arranged on the rear end face of the insulating base, conductive connectors are respectively fixed in the jacks, and the conductive connectors are connected with the insulating base. Wherein two conductive connectors are power supply connectors, at least one conductive connector is a voltage sampling connector, the front end of each conductive connector is located in the front end socket of the jack where the conductive connector is located and is used for being connected with an inserted conductive male connector in an inserted mode, and the rear end of each conductive connector extends out of the rear end of the insulating base and is used for being connected with the corresponding conductive male connector in an inserted mode. Or the rear end of the insulating base 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 of the present utility model found in the research process of the present utility model that the prior art has 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 versatility and compatibility of the plug of the battery pack and facilitating the application by users.

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

[0006] An insulating base, in which at least three jacks are respectively provided. The front sockets of each jack are respectively located on the front end face of the insulating base, and the rear sockets are respectively located on the rear end face of the insulating base.

[0007] A conductive connector is respectively fixed in each jack. Two of the conductive connectors are power connectors, and at least one of the other conductive connectors is a voltage sampling connector to output a sampling voltage.

[0008] The front ends of each conductive connector are located in the front sockets of their respective jacks and are used for plugging into the conductive connectors of the opposite plug.

[0009] The rear ends of each conductive connector extend out of the rear end of the insulating base, or the rear ends are respectively electrically connected to each wire. Each wire extends out of the rear end of the insulating base.

[0010] Optionally, a clamping portion is provided at the rear end of each conductive connector. Each clamping portion respectively clamps and fixes the exposed wire cores at the front ends of each wire. The rear ends of each wire extend out of the insulating base.

[0011] A metal jack with an opening facing forward is respectively provided at the front end of each conductive connector for the conductive connector of an external plug to be inserted.

[0012] Optionally, each of the metal jacks is formed by bending a metal piece, and the two ends of the bent metal piece are opposite to each other and have a predetermined gap.

[0013] When the conductive connector of the external plug is inserted into the metal jack, the metal piece forming the metal jack elastically deforms, and the gap increases.

[0014] Optionally, a bent metal piece is further provided in each of the metal jacks.

[0015] When the conductive connector of the external plug is inserted into the metal jack, the conductive connector of the external plug abuts against a bent portion of the metal piece, and under the action of pressure, the metal piece elastically deforms.

[0016] Optionally, a first lateral window portion is formed on the side of the insulating base.

[0017] A second lateral window portion is formed on each of the metal jacks, and each of the second lateral window portions is directly opposite to the first lateral window portion.

[0018] The end segment at the front end of each of the metal pieces is further bent backward, and the formed angle is an acute angle. The bent end extends out from the second lateral window portion and is located in front of the rear end face of the first lateral window portion.

[0019] At least one bent portion is further formed in the middle segment of each of the metal pieces.

[0020] When the conductive connector of the external plug is inserted into the metal jack, under the action of pressure, the end of the metal piece abuts against the rear end face of the first lateral window portion, the metal piece elastically deforms, the metal piece deflects toward the side where the second lateral window portion is located, and extends backward.

[0021] Optionally, plugging and unplugging handgrips are provided on at least two opposite faces on the side of the insulating base.

[0022] Optionally, on the outer side surface of the plugging and unplugging section at the front end of the insulating base, there are also provided protruding and / or recessed snap hook positions for snap connection with the snap hook positions on the inner wall of the cavity of the mating female plug.

[0023] Optionally, at least one protruding marking portion is provided on the rear end face of the insulating base.

[0024] Optionally, the centers of any three of the conductive connectors are located on two different straight lines.

[0025] In a second aspect, an embodiment of the present invention provides a lithium-ion battery pack, including:

[0026] The lithium-ion battery pack body includes at least two lithium-ion battery cells electrically connected in series, in parallel, or in a combination of both.

[0027] The charge and discharge protection module includes

[0028] A discharge circuit, electrically connected to the positive and negative electrodes of the lithium-ion battery pack body,

[0029] A charging circuit, electrically connected to the positive and negative electrodes of each of the lithium-ion battery cells,

[0030] A sampling circuit, electrically connected to the electrical node between the two lithium-ion battery cells within the lithium-ion battery pack body,

[0031] A control circuit, electrically connected to the discharge circuit, the charging circuit, and the sampling circuit respectively;

[0032] Any one of the above-mentioned plugs, the rear end of the voltage sampling connector of the plug is electrically connected to the sampling circuit, and the plug is used for the discharge output plug and / or the charging input plug.

[0033] As can be seen from the above, on the plug of the lithium-ion battery in this embodiment, independent charging sockets and discharge sockets are integrated, and the charging socket and the discharge socket are independent of each other and can be respectively plugged in with the separate charging plug and the separate discharge plug of the prior art, or can be plugged in with the plug integrated with the charging plug and the discharge 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

[0034] 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.

[0035] Figure 1 It is a three-dimensional structure schematic diagram of the plug provided in the first embodiment of the present invention;

[0036] Figure 2 It is another three-dimensional structure schematic diagram of the plug provided in the first embodiment of the present invention;

[0037] Figure 3 It is an assembly structure schematic diagram of the plug provided in the first embodiment of the present invention;

[0038] Figure 4 It is a front view structure schematic diagram of the plug provided in the first embodiment of the present invention;

[0039] Figure 5 It is a left view structure schematic diagram of the plug provided in the first embodiment of the present invention;

[0040] Figure 6 Schematic right view structure of the plug provided in the first embodiment of the present utility model;

[0041] Figure 7 Schematic A-A sectional view structure of the plug provided in the first embodiment of the present utility model;

[0042] Figure 8 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 9 Schematic three-dimensional structure of the plug provided in the first embodiment of the present utility model;

[0044] Figure 10 Schematic exploded three-dimensional structure of the plug provided in the first embodiment of the present utility model;

[0045] Figure 11 Schematic front view structure of the plug provided in the first embodiment of the present utility model;

[0046] Figure 12 Schematic left view structure of the plug provided in the first embodiment of the present utility model;

[0047] Figure 13 Schematic right view structure of the plug provided in the first embodiment of the present utility model;

[0048] Figure 14 Schematic B-B sectional view structure of the plug provided in the first embodiment of the present utility model;

[0049] Figure 15 Schematic structure diagram of the connection of two plugs provided in the first and second embodiments of the present utility model;

[0050] Figure 16 Schematic sectional view structure of the connection of two plugs provided in the first and second embodiments of the present utility model;

[0051] 1: Insulating base; 11: Plug-in end; 12: Plugging and unplugging hand grip; 13: First lateral window part; 14: Jack; 15: Rib part; 16: Snap hook position;

[0052] 17: Hanging position; 18: Chamber; 19: Introduction position;

[0053] 2: Conductive female plug-in part; 21: Clamping part; 22: Metal jack; 23: Gap; 25: Second metal part; 26: Bending part; 27: Second lateral window part;

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

[0055] 4: Conductive male plug-in part; 42: Tip; 43: Lateral 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. Herein, the illustrative embodiments of the present utility model and the descriptions are used to explain the present utility model, but not to limit the present utility model. Embodiment

[0057] See Figures 1-8 , Figures 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 components. In this embodiment, the conductive female connector 2 is taken as an example for illustration.

[0059] The insulating base 1 is the holding part of the plug and the mounting base for each conductive female connector 2. Taking the plugging end 11 of the insulating base 1 for plugging with other plugs as the front end, the end opposite to the plugging end 11 is denoted as the rear end. The front part of the insulating base 1 is an insulating male plug for plugging with a female plug.

[0060] In the insulating base 1, jacks 14 are provided. The front sockets of each jack 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 jacks 14 is the same as the number of conductive female connectors 2. A conductive female connector 2 is respectively fixed in each jack 14. Among them, two conductive female connectors 2 are power connectors, and at least one of the other conductive female connectors 2 is a voltage sampling connector.

[0061] The front ends of each conductive female connector 2 are located in the front sockets of their respective jacks 14 and do not extend beyond the front sockets. When plugging with an external female plug, the front end of the male plug in this embodiment is inserted into the chamber of the external female plug, and the conductive male plug located in the chamber of the external female plug is inserted into each jack 14 and then into the conductive female connector 2 of the plug in this embodiment to achieve electrical connection and plugging between the connectors.

[0062] The middle parts of each conductive female connector 2 are fixed in the insulating base 1, and the rear ends extend out of the rear end of the insulating base 1, or conductive wires 3 are respectively connected to the rear ends, and the wire bundles of the 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 are electrically connected to the lithium-ion battery pack.

[0063] 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 and discharge protection module.

[0064] 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.

[0065] The charge and discharge protection module includes a discharge circuit, a charging circuit, a sampling circuit, and a control circuit.

[0066] 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 implemented by, but not limited to, the plug of this embodiment). The lithium-ion battery pack discharges and outputs current to drive external electrical devices.

[0067] 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 implemented by, but not limited to, the plug of this embodiment), and the output end is electrically connected to the positive “+” and negative “-” of each battery cell respectively, so as to charge each battery cell in the lithium-ion battery pack with the current from the charging power supply.

[0068] 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 female connector, so that the plug of this embodiment can output the voltage sampler to the electrical device and / or the charging power supply connected to the mating plug at the opposite end. The external electrical device or the charging power supply 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.

[0069] When the plug of this embodiment is used as the discharge output plug of the lithium-ion battery pack, the two conductive female connectors 2 serving as the power connectors are respectively electrically connected to the total positive “+” and total negative “-” of the battery pack, and output power to the external electrical device. 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 plug at the opposite end through the sampling female connector, so that the electrical device side can further control the current output according to this sampling voltage, further improving the electrical safety.

[0070] 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 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 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 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 leading to 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.

[0071] 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, 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.

[0072] In addition, the structure of the plug of this embodiment is simple, which is beneficial to the miniaturized design of the battery pack plug.

[0073] 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. In this way, the space of the insulating base 1 can be fully utilized to realize the miniaturized design of the plug.

[0074] 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 the corresponding jack 14 without exceeding the front socket, so as to improve the moisture-proof and dust-proof performance of the plug.

[0075] As an illustration of this embodiment, a clamping part 21 is respectively formed at the rear end of each conductive female plug part 2 of this embodiment. Each clamping part 21 can be, but is not limited to, formed by bending the sheet metal at the end. The bare wire cores 31 at the front ends of a conductive wire 3 are respectively tightly clamped within each clamping part 21, and 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.

[0076] At the front end of each conductive socket female member 2, a metal socket hole 22 with an opening facing forward is respectively formed for the conductive socket male member on the external female plug to be inserted therein to achieve electrical connection. Each metal socket hole 22 can be formed by bending, but is not limited to, 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 are not closely fixed, but have a certain gap 23 facing each other. The gap 23 is parallel to the axial direction of the metal socket hole 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 socket hole 22, the first metal member forming the metal socket hole 22 undergoes a slight elastic deformation, and the gap 23 on the side of the metal socket hole 22 elastically increases slightly. The inner wall of the metal socket hole 22 closely adheres between the outer wall of the inserted conductive socket male member and the socket hole 14 where the metal socket hole 22 of this embodiment is located, and it is not easy to come off.

[0077] As a schematic illustration of this embodiment, a bent second metal member 25 is further provided in each metal socket hole 22, such as but not limited to a metal strip or a metal sheet with the ability of elastic deformation. As a schematic illustration of this embodiment, the front end of the second metal member 25 is fixed in the metal socket hole 22 or extends out of the metal socket hole 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 socket hole 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 in the metal socket hole 22 and at least one bent portion 26 of the second metal member 25. The external conductive socket male member has a radially outward pressing force on the metal socket hole 22, and the second metal member 25 undergoes elastic deformation. In addition to closely adhering to the inner wall of the metal socket hole 22, the inserted conductive socket male member 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.

[0078] As a schematic 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 socket hole 14 of the insulating base 1. Correspondingly, a second lateral window portion 27 is respectively opened on each metal socket hole 22. When each conductive socket female member 2 is respectively inserted into each socket hole 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 socket hole 22 with the outside.

[0079] Further, the end segments at the front ends of the second metal pieces 25 located within the respective metal jacks 22 are also bent backward, forming an acute included angle, and the bent ends extend out from the second side window portion 27 and are located in front of the rear end face of the first side window portion 13, abuting or almost abutting against it. Under the squeezing action of the inserted conductive male plug on the middle bending portion 26 of the second metal piece 25, the end of the second metal piece 25 tightly abuts 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 piece 25 extends backward, the second metal piece 25 elastically deforms and deflects toward the second side window portion 27, and the inserted conductive male plug is tightly limited between the elastically deformed second metal piece 25 and the metal jack 22, with close contact and not easily detachable, ensuring the reliability of the electrical connection.

[0080] As an illustration of this embodiment, at least two opposite sides on the side of the insulating base 1 are also provided with plugging and unplugging hand-holding portions 12, such as, but not limited to, on the top surface and the bottom surface, and can also surround the outer periphery of the side surface of the insulating base 1. The plugging and unplugging hand-holding portion 12 can be set as a concave position convenient for finger positioning and holding, and ribs 15 can also be provided on the surface of the concave position, where the ribs 15 can be in strip or mesh shape. Adopting this design is beneficial to improving the convenience of the user's plugging and unplugging operations, enhancing the usability, and avoiding hand slipping during the plugging and unplugging process.

[0081] As an illustration of this embodiment, a snap hook position 16 is also provided on the outer side surface of the plugging end 11 near the front end of the insulating base 1. When the plug of this embodiment is plugged into an external female plug, the snap hook position 16 on the outer side surface of this plug and the snap hook positions on the inner wall of the cavity of the mating female plug are mutually limited and matched for snap connection, avoiding loosening, ensuring reliable plugging and unplugging, and adopting this snap hook position design is also beneficial to avoiding reverse plugging and ensuring the safety of the electrical connection.

[0082] 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 "+", the 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

[0083] See Figures 8-16 。

[0084] 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, and this embodiment takes the conductive male plug 4 as an illustration.

[0085] The segment of the insulating base 1 near the front end is a plugging end for plugging into the mating female plug, which is an insulating male plug; the rear end is a plugging and unplugging hand-holding portion 12 for the user to hold for plugging and unplugging operations. The middle and rear ends of each conductive male plug 4 are fixed to the middle or rear segment of the insulating base 1.

[0086] A chamber 18 with a front-end 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 plug connectors 4. A conductive male plug connector 4 is fixed in each jack 14 respectively.

[0087] Among them, two conductive male plug connectors 4 are power supply connectors, and at least one of the other conductive male plug connectors 4 is a voltage sampling connector.

[0088] The front-end sockets of each jack 14 communicate with the chamber 18 and are located on the rear end face of the chamber 18, and the rear-end sockets are respectively located on the rear end face of the insulating base 1.

[0089] A conductive male plug connector 4 is fixed in each jack 14 respectively. Among them, two conductive male plug connectors 4 are power supply connectors, and at least one of the other conductive male plug connectors 4 is a voltage sampling connector.

[0090] The front ends of each conductive male plug connector 4 are jointly located in the chamber 18 at the front end of the jack 14 where it is located and do not extend beyond the chamber 18. There is a gap between each conductive male plug connector 4 to ensure electrical isolation; there is a certain gap between each conductive male plug connector 4 and the inner wall of the chamber 18 for plugging with the male plug at the opposite end. Each conductive male plug 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 plug in each jack 14 to achieve circuit connection.

[0091] The rear ends of each conductive male plug connector 4 extend out of 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 of the rear end of the insulating base 1 to be electrically connected to the battery pack.

[0092] 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-discharge protection module.

[0093] 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 to provide current externally as a whole.

[0094] The charge-discharge protection module includes a discharge circuit, a charging circuit, a sampling circuit, and a control circuit.

[0095] 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 male plug connector 4 of the power output interface of the battery pack (which can but is not limited to being implemented by the plug of this embodiment). The lithium-ion battery pack discharges and outputs current to drive external electrical equipment.

[0096] The input end of the charging circuit is electrically connected to the rear end of the conductive male plug 4 serving as a charging interface (which can be implemented by, but is not limited to, the plug of this embodiment), and the output end is electrically connected to the positive electrode ‘+’ and negative electrode ‘-’ of each battery cell respectively, so as to charge each battery cell in the lithium-ion battery pack with the current from the charging power supply.

[0097] 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 plug of this embodiment as a voltage sampling male plug, so that the plug of this embodiment can output the voltage sampler to the electrical equipment and / or charging power supply connected to the mating female 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 prolonging the service life of the lithium-ion battery pack.

[0098] When the plug of this embodiment is used as the discharge output plug of the lithium-ion battery pack, the two conductive male plugs 4 serving as power connectors are electrically connected to the total positive ‘+’ and total negative ‘-’ of the battery pack respectively, and 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 external output total positive ‘+’ and total negative ‘-’ through the two power connectors, the plug of this embodiment further outputs other sampling voltages to the mating female plug through the sampling male plug, so that the electrical equipment side can further control the current output according to this sampling voltage, further improving the electrical safety.

[0099] When the plug of this embodiment is used as the charging input plug of the lithium-ion battery pack, the two conductive male plugs 4 serving as power output connectors are electrically connected to the positive electrode ‘+’ and negative electrode ‘-’ of each lithium-ion battery cell of the battery pack respectively. The plug of the charging power supply is mated with the plug of this embodiment, and the current input from the charging power supply is respectively input to each lithium-ion battery cell to charge each battery cell. Compared with the prior art, adopting the technical solution of this embodiment, when the 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 male plug, so that the charging power supply can further control the output of the charging current according to this sampling voltage, and when the battery pack is abnormal, stop the output of the charging current on the charger side to avoid further abnormalities leading to charging safety accidents. It can be seen that adopting the technical solution of this embodiment is beneficial to further improve the charging safety of the lithium-ion battery pack and extend the service life of the battery pack.

[0100] The plug of this embodiment can be used as the discharge plug of the lithium-ion battery pack, can also be used as the charging plug of the 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.

[0101] In addition, the structure of the plug in this embodiment is simple, which is conducive to the miniaturized design of the battery pack plug.

[0102] For example, at least three conductive plug-in male 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 structure, that is, the centers of any three conductive plug-in male members 4 are not on the same straight line but on two different straight lines. Taking the example of having three conductive plug-in male 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 and achieve the miniaturized design of the plug.

[0103] As an illustration of this embodiment, in this embodiment, the front ends of the respective conductive plug-in male members 4 are respectively located within their corresponding jacks 14 without exceeding the front socket, so as to improve the moisture-proof and dust-proof effects.

[0104] As an illustration of this embodiment, a clamping portion 21 is respectively formed at the rear end of each conductive plug-in male member 4 of this embodiment. Each clamping portion 21 can, but is not limited to, be formed by bending a sheet metal at the rear end of the conductive plug-in male member 4. The bare wire cores 31 at the front ends of a conductive wire 3 are respectively tightly clamped in each clamping portion 21, and 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.

[0105] The front ends of the respective conductive plug-in male members 4 are respectively solid conductive plug bars or plugs for making electrical connections with the mating female members of the plugs at the opposite end. As an illustration of this embodiment, it is preferred to design the front ends of the respective conductive plug bars to be pointed portions 42 with gradually decreasing thickness or diameter.

[0106] As an illustration of this embodiment, an inverted hanging position 17 is further provided on the inner wall of the jack 14 of the insulating base 1, where the inverted hanging 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 plug-in male member 4 with the conductive wire 3 clamped at the rear end is inserted into each jack 14 from the rear socket of the insulating base 1; when inserted to a certain extent, the lateral locking portion 43 on the conductive plug-in male member 4 is locked and positioned within the inverted hanging position 17 on the inner wall of the jack 14, and the conductive plug-in male member 4 is positioned within the inverted hanging position 17 and cannot move back and forth. The front end of the conductive plug-in male member 4 extends out from the front socket of the jack 14 and is located within the chamber 18 at the front end of the insulating base 1. The adoption of the lateral locking portion 43 and the inverted hanging position 17 is conducive to precise positioning and assembly, improving the assembly efficiency and effect. And with this design, during the plugging and unplugging with an external plug, it is not easy to displace due to the plugging and unplugging force, which is conducive to improving the durability of the product.

[0107] As an illustration of this embodiment, on the inner wall of each jack 14, there is also an introduction position 19 respectively. The introduction position 19 is located at the rear end of the inverted position 17 of the jack 14 and at the front end of the rear socket of the jack 14. The introduction position 19 is located on the side opposite to the side where the inverted position 17 is located.

[0108] Taking the inverted position 17 as a lateral recess, and the inverted position 17 being located on the lower wall of the jack 14 as an example, the introduction position 19 is located on the upper wall of the jack 14. And in the direction from the rear to the front, the distance between the wall at the introduction position 19 and the opposite wall gradually becomes narrower, so that: when the conductive plug-in male member 4 is inserted into the jack 14, the lateral snap portion 43 of the conductive plug-in male member 4 faces downward. The conductive plug-in male member 4 enters from the rear jack 14, passes through the introduction position 19 on the wall. Under the squeezing and guiding action of the introduction position 19, the conductive plug-in male member 4 elastically deforms and deflects towards the wall side where the inverted position 17 is provided until the lateral snap portion 43 on the metal connector enters the inverted position 17 of the wall, and the conductive plug-in male member 4 elastically returns to its natural state, and the conductive plug-in male member 4 is positioned here.

[0109] As can be seen from the above, the setting of the introduction position 19 is beneficial to the accurate positioning and assembly of the conductive plug-in male member 4, and improves work efficiency. As an illustration of this embodiment, the front end section of the conductive plug-in male member 4 can be designed as a flat metal strip, and the lateral snap portion 43 is provided on the lower surface of the flat metal strip.

[0110] As an illustration of this embodiment, on the outer side of the rear end of the insulating base 1, there is a plugging and unplugging hand grip portion 12. For example, it can be provided on the top surface and the bottom surface, and can also surround the outer periphery of the side surface of the insulating base 1. The plugging and unplugging hand grip portion 12 can be set as a concave position convenient for finger positioning and gripping, 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 the user for plugging and unplugging operations, improving the usability, and avoiding hand slipping during the plugging and unplugging process.

[0111] As an illustration of this embodiment, on the outer side surface of the plugging section near the front end of the insulating base 1, there is also a snap hook position (not shown in the figure). When the plug of this embodiment is plugged into an external female plug, the snap hook position on the outer side surface of this plug and the snap hook position on the inner wall of the cavity 18 of the mating female plug are mutually limited and matched for snap connection, avoiding loosening, and the plugging is reliable. And adopting this snap hook position design is also beneficial to avoiding reverse plugging and ensuring the safety of electrical connection.

[0112] The above-described embodiments do not constitute a limitation on the protection scope of this technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the above embodiments shall be included in the protection scope of this technical solution.

Claims

1. A plug, comprising: An insulating base, wherein at least three jacks are respectively arranged in the insulating base, the front end sockets of the jacks are respectively located at the front end surface of the insulating base, and the rear end sockets are respectively located at the rear end surface of the insulating base, A conductive connector is fixed in each of the jacks, two of which are power connectors, and at least one of which is a voltage sampling connector to output a sampling voltage. The front end of each conductive connector is located in the front end socket of the jack where it is located, and is used to connect with the conductive connector of the opposite end plug. The rear end of each conductive connector extends out of the rear end of the insulating base, or the rear end is electrically connected to each conductive wire, 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 provided at the rear end of each conductive connector, and each clamping portion clamps and fixes the exposed conductive wire core at the front end of each conductive wire, and the rear end of each conductive wire extends out of the insulating base. The front end of each conductive connector is respectively provided with a metal plug hole with an opening facing forward for inserting the conductive connector of an external plug.

3. The plug according to claim 2, characterized in that: Each of the metal sockets is formed by bending a metal piece, and the two ends of the bent metal piece are opposite to each other and have a predetermined gap. When the conductive connector of the external plug is inserted into the metal plug hole, the metal piece forming the metal plug hole is elastically deformed and the gap is increased.

4. The plug according to claim 3, characterized in that: Each of the metal sockets is also provided with a bent metal piece. When the conductive connector of the external plug is inserted into the metal plug hole, the conductive connector of the external plug abuts against a bent portion of the metal piece, and under the action of pressure, the metal piece is elastically deformed.

5. The plug according to claim 4, characterized in that: A first lateral window is provided on the side of the insulating base. A second lateral window is formed on each of the metal plug holes, and each of the second lateral windows is directly opposite to the first lateral window. The end section of the front end of each of the metal parts is further bent backwards, and the angle formed by the bending is an acute angle. The bent end extends out from the second lateral window portion and is located in front of the rear end surface of the first lateral window portion. At least one bending portion is formed in the middle section of each metal piece. When the conductive connector of the external plug is inserted into the metal socket, under the action of pressure, the end of the metal part abuts against the rear end surface of the first lateral window portion, the metal part elastically deforms, and the metal part deviates to the side where the second lateral window portion is located and extends backward.

6. The plug according to claim 1, characterized in that: At least two opposite sides of the insulating base are provided with plug-in and pull-out handles.

7. The plug according to claim 1, characterized in that: The outer side surface of the plug-in section at the front end of the insulating base is also provided with a protruding and / or recessed snap-in hanging position for snap-connecting with the snap-in hanging position on the inner wall of the cavity of the female plug to be plugged in.

8. The plug according to claim 1, characterized in that: At least one protruding identification portion is also provided on the rear end surface 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: include: The lithium-ion battery pack body comprises at least two lithium-ion cells electrically connected in series or in parallel or in combination of the two; Charge and discharge protection module, including: A discharge circuit is electrically connected to the positive electrode and the negative electrode of the lithium-ion battery pack body. A charging circuit is electrically connected to the positive electrode and the negative electrode of each of the lithium-ion batteries. A sampling circuit is electrically connected to an electrical node between two lithium-ion cells in 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, wherein 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 and / or a charging input plug.

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