Plug and lithium ion battery

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. The plug comprises an insulating base, the front end of the insulating base is provided with a first insulating socket and a second insulating socket which protrude forwards and are separated from each other, the first insulating socket is internally provided with two jacks, the front-end jack of each jack is located at the front end of the first insulating socket, and the rear-end jack of each jack is located at the rear end of the insulating base. The second insulating socket is internally provided with at least two jacks, the front end opening of each jack is located at the front end of the second insulating base, and the rear end jack is located at the rear end of the insulating base; the two discharge plugging female parts are respectively fixed in the two jacks of the first insulation socket, the front ends of the discharge plugging female parts are respectively in a tubular shape for plugging of the plugging male parts, and the rear ends of the discharge plugging female parts respectively extend out of the insulation base; and the two charging plug-in female pieces are respectively fixed in the two jacks of the second insulating socket, the front end of each charging plug-in female piece is provided with a jack and is respectively positioned in the jack, and the rear end of each charging plug-in female piece respectively extends out of the insulating base or extends out of the insulating base through a conductive wire.

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. 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 wire 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 during the research process of the present utility model that the prior art has the defects of inconvenient plug - in and excessive space occupation. 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. Applying this technical solution is beneficial to improving the versatility and compatibility of the plug of the battery pack and facilitating user application.

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

[0006] An insulating base, at the front end of the insulating base, there are forward - protruding and separated first insulating sockets and second insulating sockets.

[0007] In the first insulating socket, there are two jacks. The front sockets of each jack are located at the front end of the first insulating socket, and the rear sockets are located at the rear end of the insulating base.

[0008] In the second insulating socket, there are at least two jacks. The front openings of each jack are located at the front end of the second insulating base, and the rear sockets are located at the rear end of the insulating base.

[0009] Two discharge plug - in female parts, which are respectively fixed in the two jacks of the first insulating socket. The front ends of each discharge plug - in female part are tubular for the plug - in male part to be inserted, and the rear ends respectively extend out of the insulating base.

[0010] Two charging plug - in female parts, which are respectively fixed in the two jacks of the second insulating socket. The front ends of each charging plug - in female part are provided with sockets, which are respectively located in the jacks where they are located. The rear ends of each charging plug - in female part respectively extend out of the insulating base or extend out of the insulating base through conductive wires.

[0011] Optionally, each of the discharge female plug connectors is a copper part. The front end section of the copper part is a copper tube, and the rear end of the copper tube is a closed end. A welding position is further provided at the rear end of the closed end, and the welding position is located outside the insulating base.

[0012] Optionally, it further includes at least one sampling female plug connector, which is fixed in the jack of the second insulating socket. An insertion socket is provided at the front end of each of the sampling female plug connectors, and the rear end extends outside the insulating base.

[0013] Optionally, each of the charging female plug connectors and the sampling female plug connectors respectively includes:

[0014] A clamping part formed at the rear end, and each of the clamping parts respectively clamps and fixes the bare wire cores at the front ends of the respective wire conductors. The rear ends of the respective wire conductors extend outside the insulating base.

[0015] A metal jack formed at the front end and opening forward, serving as an external insertion socket.

[0016] Optionally, each of the charging female plug connectors and the sampling female plug connectors respectively includes:

[0017] A clamping part formed at the rear end, and each of the clamping parts respectively clamps and fixes the bare wire cores at the front ends of the respective wire conductors. The rear ends of the respective wire conductors extend outside the insulating base.

[0018] A metal jack formed at the front end and opening forward, serving as an external insertion socket.

[0019] Optionally, a bent second metal part is further provided in each of the metal jacks. The front end of the second metal part is a fixed end, and the rear end is a free end.

[0020] When an external male plug connector is inserted into the metal jack, the inserted male plug connector abuts against at least one bent part of the second metal part. Under the extrusion of the inserted male plug connector, the second metal part elastically deforms.

[0021] Optionally, a first lateral window part is opened on the side of the second insulating socket.

[0022] A second lateral window part is respectively opened on each of the metal jacks, and each of the second lateral window parts is directly opposite to the first lateral window part.

[0023] The end section at the front end of each of the second metal parts is bent backward, and the bent end extends out from the second lateral window part and is located in front of the rear end face of the first lateral window part.

[0024] At least one of the bent parts is further formed in the middle section of each of the second metal parts.

[0025] When an external male plug is inserted into the metal socket, under the action of pressure, the end of the second metal part abuts against the rear end face of the first lateral window part, and the second metal part elastically deforms and extends backward toward the side where the second lateral window part is located.

[0026] Optionally, first lateral snap portions are respectively provided on the sides of each of the discharge female connectors, and second lateral snap portions are respectively provided on the inner walls of the sockets. The first lateral snap portions of each of the discharge female connectors are respectively snapped with the second lateral snap portions of the sockets where they are located.

[0027] In a second aspect, a lithium-ion battery provided by an embodiment of the present invention includes:

[0028] A lithium-ion battery pack body, including a plurality of lithium-ion battery cells electrically connected in series or in parallel or in a combination of both;

[0029] A charge and discharge protection module, including,

[0030] A discharge circuit, electrically connected to the positive electrode and the negative electrode of the lithium-ion battery pack body,

[0031] A charging circuit, electrically connected to the positive electrode and the negative electrode of each of the lithium-ion battery cells,

[0032] A control circuit, electrically connected to the discharge circuit and the charging circuit respectively;

[0033] Any one of the above plugs, the rear end of the charging female connector of the plug is electrically connected to the charging circuit, and the rear end of the discharge female connector of the plug is electrically connected to the discharge circuit.

[0034] Optionally, the charge and discharge protection module further includes a sampling circuit, electrically connected to any electrical node in the lithium-ion battery pack body, and the sampling circuit is also electrically connected to the control circuit and the sampling connector of the plug.

[0035] As can be seen from the above, the charging socket and the discharge socket are integrated independently on the plug of the lithium-ion battery in this embodiment, and the charging socket and the discharge socket are independent of each other and can be respectively plugged in with a separate charging plug and a separate discharge plug in the prior art, or can be plugged in with a plug integrated with a charging plug and a 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. Description of the Drawings

[0036] 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.

[0037] Figure 1Schematic diagram of the three-dimensional structure of the plug provided in the first embodiment of the present utility model;

[0038] Figure 2 Schematic diagram of the exploded three-dimensional structure of the plug provided in the first embodiment of the present utility model;

[0039] Figure 3 Schematic diagram of the front view structure of the plug provided in the first embodiment of the present utility model;

[0040] Figure 4 Schematic diagram of the left view structure of the plug provided in the first embodiment of the present utility model;

[0041] Figure 5 Schematic diagram of the right view structure of the plug provided in the first embodiment of the present utility model;

[0042] Figure 6 Schematic diagram of the A-A sectional view structure of the plug provided in the first embodiment of the present utility model;

[0043] Figure 7 Schematic diagram of the top view structure of the plug provided in the first embodiment of the present utility model;

[0044] Figure 8 Schematic diagram of the bottom view structure of the plug provided in the first embodiment of the present utility model;

[0045] Figure 9 Schematic diagram of the assembly structure of the plug provided in the first embodiment of the present utility model when it is inserted into the female connector;

[0046] Figure 10 Schematic diagram of the three-dimensional view when the plug provided in the first embodiment of the present utility model is inserted into the female connector;

[0047] Figure 11 Schematic diagram of the three-dimensional structure of the plug provided in the second embodiment of the present utility model;

[0048] Figure 12 Schematic diagram of the top view structure of the plug provided in the second embodiment of the present utility model;

[0049] Figure 13 Schematic diagram of the bottom view structure of the plug provided in the second embodiment of the present utility model;

[0050] Figure 14 Schematic diagram of the front view structure of the plug provided in the second embodiment of the present utility model;

[0051] Figure 15 Schematic diagram of the left view structure of the plug provided in the second embodiment of the present utility model;

[0052] Figure 16 Schematic diagram of the right view structure of the plug provided in the second embodiment of the present utility model;

[0053] Figure 17 Schematic diagram of the exploded structure of the plug provided in the second embodiment of the present utility model;

[0054] Figure 18 Schematic diagram of the sectional structure of the plug provided in the second embodiment of the present utility model;

[0055] Figure 19 Schematic diagram of the assembled structure of the plug provided in the second embodiment of the present utility model when plugged into the female connector;

[0056] Figure 20 Schematic perspective view of the plug provided in the second embodiment of the present utility model when plugged into the female connector;

[0057] Figure 21 Schematic diagram of the circuit principle of the battery pack with a charging and discharging plug provided in the first and second embodiments of the present utility model;

[0058] Figure 22 Schematic diagram of the transfer assembly of two charging and discharging plugs provided in the first and second embodiments of the present utility model;

[0059] Figure 23 Schematic sectional view of the connection of two charging and discharging plugs provided in the first and second embodiments of the present utility model.

[0060] 21: First insulating base; 211: First insulating socket; 212: Second insulating socket;

[0061] 213: First jack; 214: Second lateral snap portion; 23: Charging female connector;

[0062] 24: Sampling female connector; 22: Discharging female connector; 221: Welding portion;

[0063] 222: First lateral snap portion; 25: Clamping portion; 26: Metal jack; 27: Gap;

[0064] 28: Metal part; 281: End segment; 282: Bent portion; 291: First lateral window portion;

[0065] 292: Second lateral window portion; 5: Conductive wire; 31: Female plug of the power supply of the electrical equipment;

[0066] 1: Second insulating base; 11: First chamber; 12: Second chamber; 13: Jack; 4: Hanging position;

[0067] 2: Discharging connector; 21: Metal sheet; 22: Gap; 3: Charging connector;

[0068] 4: Sampling connector; 5: Conductive wire; 6: Lateral snap part; 7: Import position; 8: Limiting part;

[0069] 9: Male connector; 10: Female connector. Detailed implementation manner

[0070] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the illustrative embodiments of the present invention and the description are used to explain the present invention, but not to limit the present invention.

[0071] Embodiment 1.

[0072] See Figures 1-10 Figures 21 as shown.

[0073] This embodiment provides a plug, which mainly includes a first insulating base 21, two independent discharge female connectors 22, and two independent charging female connectors 23.

[0074] The first insulating base 21 is the holding part of the plug and the mounting base of each connector. The discharge female connectors 22 and the charging female connectors 23 are both arranged on the first insulating base 21. Specifically, taking the end of the first insulating base 21 that is plugged in with other plugs as the front end, and the end opposite to the front end as the rear end.

[0075] At the front end of the first insulating base 21, there are provided a first insulating socket 211 and a second insulating socket 212 that protrude forward. The two insulating sockets are in an independent separated state, specifically, there is a certain distance between them.

[0076] In the first insulating socket 211, there are provided two first jacks 213 that extend through the front and back. The front sockets of each first jack 213 are respectively located on the front end face of the first insulating socket 211, and the rear sockets are located at the rear end of the first insulating base 21. One of the first jacks 213 on the first insulating socket 211 is fixed with a discharge female connector 22, and the other first jack 213 is fixed with another discharge female connector 22.

[0077] The front ends of each discharge female connector 22 are respectively located in their corresponding first jacks 213 and do not extend beyond the front sockets, so as to improve the moisture-proof and dust-proof effects. The front ends of each discharge female connector 22 are respectively provided with sockets for inserting male connectors. The rear ends of each discharge female connector 22 respectively extend out of the rear end of the first insulating base 21 from the rear sockets. In addition, welding parts 221 can be provided at the rear ends of the two discharge female connectors 22 respectively, but not limited to this, to weld the power lines of external electrical equipment to output current and supply power to external electrical equipment.

[0078] As an illustration of this embodiment, the discharge female connector 22 of this embodiment can be made of copper. For example but not limited to, the front end segment of the copper piece is set as a copper tube with the tube orifice facing forward, and the rear end of the copper tube is preferably designed as a closed end to improve the moisture and dust proof performance of the plug. The rear end of the closed end extends beyond the rear end of the first insulating base 21, and a welding portion 221 is provided at the rear end.

[0079] As an illustration of this embodiment, it is possible but not limited to pre-place the discharge female connector 22 in the injection mold when the first insulating base 21 is injection molded, and each connector is integrally molded on the first insulating base 21 during injection molding.

[0080] As an illustration of this embodiment, on the outer periphery of the middle part of each discharge female connector 22 of this embodiment, a first lateral buckle portion 222 is respectively provided, and on the hole walls of each first jack 213 of the first insulating socket 211, a second lateral buckle portion 214 corresponding in position, shape and size to the first lateral buckle portion 222 is respectively provided. After assembly, the first lateral buckle portions 222 of each discharge female connector 22 are respectively buckled with the second lateral buckle portions 214 of the first jack 213 where they are located, and each discharge female connector 22 is positioned in each first jack 213 of the first insulating socket 211. When plugging and unplugging with the female plug 31 of the power supply of an external electrical device, under the action of the plugging and unplugging force, each discharge connector is stable and does not move back and forth.

[0081] In the second insulating socket 212, at least two first jacks 213 extending forward and backward and penetrating through are provided. The front end sockets of the two first jacks 213 are located on the front end face of the second insulating socket 212, and the rear end sockets are located at the rear end of the first insulating base 21. A discharge female connector 22 is fixed in one of the first jacks 213 of the second insulating socket 212, and another discharge female connector 22 is fixed in the other first jack 213.

[0082] The front ends of each charging female connector 23 are respectively located in the first jack 213 where they are located without exceeding their front end sockets, and the rear ends of each charging female connector 23 respectively extend beyond the rear end of the first insulating base 21, or extend out from the rear end of the first insulating base 21 through the connected conductive wire 5. Each charging female connector 23 is respectively provided with a socket for inserting the male plug of an external charging power supply for electrical connection to realize current input to charge the battery pack.

[0083] As can be seen from the above, the plug of this embodiment integrates a discharge plug provided on the first insulating socket 211 and a charge-discharge plug provided on the second insulating socket 212, and there is a gap between the first insulating socket 211 and the second insulating socket 212. When used, they can be plugged in separately with a separate discharge plug of the prior art and a separate charge plug of the prior art. It can also be plugged in with a plug that integrates a charge plug and a discharge plug that matches the plug of this embodiment to achieve conversion to adapt to the interface of an external plug. For further application principles, please refer to the corresponding description of the lithium-ion battery with the plug of this embodiment below.

[0084] As an illustration of this embodiment, in addition to the first socket 213 for fixing the charging female connector 23, the second insulating socket 212 is further provided with first sockets 213 for fixing each sampling female connector 24, and the front end socket of the sampling female connector 24 is completely located in the front end socket of the first socket 213 where it is located.

[0085] The structure of each sampling connector female component 24 can be but is not limited to being the same as that of each charging connector female component 23. Specifically, a socket is provided at the front end of the sampling connector female component 24, and the rear end of the sampling connector female component 24 extends out of the rear end of the first insulating base 21, or the wire connected to its rear end extends out of the rear end of the first insulating base 21 for external connection.

[0086] When in use, the sampling connector mother component 24 is electrically connected to a predetermined electrical node in the battery pack body and the control circuit in the charge and discharge control module of the battery pack through the conductive wire 5, the voltage of the electrical node is sampled, and the sampling result is input into the control circuit. At the same time, the sampling result is transmitted to the control module of the charging power supply at the opposite end (if the plug at the charging power supply end is also equipped with the sampling connector mother component 24), so that the external charging power supply can control the output charging voltage and charging current according to the sampled voltage value of the battery pack on the charged side, so as to further improve the charging balance and safety, avoid overcharging, and increase the life of the battery pack.

[0087] As an illustration of this embodiment, each charging female socket 23 and sampling female socket 24 of this embodiment are mainly made of metal sheet metal parts. A clamping portion 25 is respectively formed at the rear end of the metal sheet metal part. Each clamping portion 25 can be formed by bending a sheet of metal at the end of the metal sheet metal part, but is not limited thereto. The front end of an exposed wire core of a conductive wire 5 is tightly clamped within each clamping portion 25. Each conductive wire 5 extends from the rear end of the first insulating base 21 to be electrically connected to the charge and discharge protection module of the battery pack. As an illustration of this embodiment, the wire cores of the conductive wires 5 at the rear end of the wire harness can be commonly connected to a multi-pin plug. When plugging and unplugging with the charge and discharge control module of the battery pack, the plugging and unplugging of a multi-pin plug realizes the electrical connection of multiple conductive wires 5, improving work efficiency and avoiding incorrect connection. As an illustration of this embodiment, an anti-reverse plugging portion is further provided on the multi-pin plug. Only when the anti-reverse plugging portions of the mating pin plugs match can successful plugging be achieved, avoiding reverse connection.

[0088] A metal socket 26 with an opening facing forward is respectively formed at the front end of each metal sheet metal part for the insertion of the mating male plug to achieve electrical connection. As an illustration of this embodiment, each metal socket 26 can be formed by bending a metal part 28 (such as but not limited to a metal sheet) located at the front end of the metal sheet metal part, but is not limited thereto. The two ends of the bent metal part 28 do not closely adhere and fix to each other, but instead have a certain gap 27 facing each other. The gap 27 is parallel to the axial direction of the metal socket 26, and the width of the gap 27 is the same everywhere. In this way, when an external male plug is inserted into the metal socket 26, the metal part 28 forming the metal socket 26 undergoes a slight elastic deformation, and the lateral gap 27 of the metal socket 26 elastically increases. Under the restriction of the inner wall of the first socket 213 where the metal socket 26 is located, the inner wall of the metal socket 26 closely adheres between the outer wall of the inserted male plug and the inner wall of the first socket 213 of the second insulating socket 212. Under the action of the elastic deformation force of the metal socket 26, it is not easy to become disengaged during plugging and unplugging.

[0089] As an illustration of this embodiment, a bent metal piece 28 is further provided in each metal socket 26 respectively, such as but not limited to a metal strip or a metal sheet with elastic deformation ability. The front end of the metal piece 28 is fixed in the metal socket 26 or extends out of the metal socket 26 and is fixed in the first socket 213 on the first insulating base 21 or extends out of the first socket 213 and is fixed on the first insulating base 21. The middle section and the rear end of the metal piece 28 are both free ends and can elastically extend under pressure. When an external male plug is inserted into the metal socket 26 in the first socket 213 of the second insulating socket 212, the male plug is in close contact with the bent metal piece 28 in the metal socket 26. Under the pressure of the male plug, the metal piece 28 elastically deforms. In addition to being in close contact with the inner wall of the metal socket 26, the inserted male plug is further in close contact with the bent metal piece 28 in the metal socket 26, making it further difficult to become loose. This further improves the plugging reliability of the second insulating socket 212 when plugged into the plug of an external charging power source.

[0090] As an illustration of this embodiment, lateral window portions (denoted as first lateral window portions 291) can be further opened on the sides of each first socket 213 of the second insulating socket 212, and each first lateral window portion 291 is located on the side of the second insulating socket 212 respectively.

[0091] Correspondingly, second lateral window portions 292 are respectively opened on each metal socket 26. When each charging female plug 23 and sampling female plug 24 are respectively inserted into each first socket 213 of the second insulating socket 212, each second lateral window portion 292 is respectively aligned with and located within each first lateral window portion 291, forming lateral window portions that communicate each metal socket 26 with the outside.

[0092] Further, a section at the front end of each metal piece 28 located in each metal jack 26 is bent laterally towards the side window portion, such that the bent end section 281 forms an acute angle a with the axial direction of the metal jack 26 in which it is located. The end section 281 extends out from the second side window portion 292 and the first side window portion 291, and is located in front of the rear end face of the first side window portion 291, abuting or almost abutting against it. Also, at least one bending portion 282 is formed in the middle section of the metal piece 28. These bending portions 282 are located within the metal jack 26 and may or may not be in contact with the inner wall of the first jack 213 opposite the first side window portion 291. When an external male plug is inserted into the metal jack 26, the male plug abuts against at least one bending portion 282 in the middle section of the metal piece 28. The front end of the metal piece 28 tightly abuts against the rear end face of the first side window portion 291 for fixed positioning. The free end of the rear end of the metal piece 28 extends rearward, and the middle section of the metal piece 28 elastically deforms and deflects towards the second side window portion 292. The inserted male plug is tightly limited between the elastically deformed metal piece 28 and the metal jack 26, is not easily disengaged, and has close contact, ensuring the reliability of the electrical connection and reducing the contact resistance.

[0093] As an illustration of this embodiment, a transfer circuit is also provided on the charge and discharge control module of the battery pack for electrically connecting the charging circuit and the discharge plug. When an external charging power source is connected to charge the battery pack, the control circuit cuts off the electrical connection between the discharge circuit and the discharge plug, connects the transfer circuit to transfer the current input from the external charging power source to the discharge plug, and outputs it to an external electrical device through the discharge connector to drive the electrical device to work.

[0094] The plug of this embodiment can be applied to lithium-ion batteries. A lithium-ion battery includes a lithium-ion battery pack body, a charge and discharge protection module, and the plug of the above embodiment of this invention.

[0095] The lithium-ion battery pack body includes a plurality of lithium-ion battery cells, and each cell is electrically connected in series, in parallel, or a combination of both.

[0096] The charge and discharge protection module includes a discharge circuit, a charging circuit, and a control circuit electrically connected to the discharge circuit and the charging circuit respectively. The control circuit controls the operation of the charging circuit and the discharge circuit.

[0097] Among them, the input end of the discharge circuit is electrically connected to the positive and negative electrodes of the lithium-ion battery pack body, and the output end is electrically connected to the rear end of the discharge female connector 22 of the plug of this embodiment respectively. When the plug of this embodiment is plugged into the power plug of an external electrical device, the battery pack body is in a discharge state, and the discharge circuit outputs current externally under the control of the control circuit. Applying this solution, during the discharge process, the charging female connector 23 of the plug is electrically connected to each battery cell and the control circuit respectively. Therefore, during the discharge process, the charging female connector 23 on the plug becomes the voltage sampling circuit of each battery cell, and the control circuit further controls the discharge of the battery pack according to the current voltage of each battery cell to balance the discharge and avoid over-discharge.

[0098] The output end of the charging circuit is electrically connected to the positive and negative electrodes of each lithium-ion battery cell in the battery pack body, and the input end is electrically connected to the rear end of the charging female connector 23 of the plug of this embodiment. When the plug of this embodiment is plugged into an external charging power supply, the charging circuit charges each lithium-ion battery cell under the control of the control circuit. Applying this solution, during the charging process of the battery pack, the discharge female connector 22 of the plug becomes the voltage sampling circuit of the battery pack body, and the control circuit further controls the charging of each battery cell according to the voltage of the battery pack body to balance the charging and avoid overcharging.

[0099] As can be seen from the above, when applying the plug of this embodiment in the battery pack, the plug integrates the charging plug and the discharge plug, which is beneficial to facilitating the external connection of users and saving the occupied space of plugging. And compared with the prior art, during the charging process, the circuit of the discharge interface becomes the voltage sampling circuit of the charging process, and during the discharge process, the circuit of the charging interface becomes the voltage sampling circuit of the discharge process. The control circuit performs balanced charge and discharge control according to each voltage sampling signal, providing further balanced protection for the safety and reliability of the charging and discharging of the battery pack.

[0100] Embodiment 2.

[0101] See Figures 11-21 as shown.

[0102] This embodiment provides a plug, which mainly includes a second insulating base 1, a discharge connector 2, and a charging connector 3.

[0103] The second insulating base 1 is the handheld part of the plug. The discharge connector 2 and the charging connector 3 are both arranged on the second insulating base 1. Specifically, taking the end of the second insulating base 1 that is plugged into other plugs as the front end and the end opposite to the front end as the rear end. A first chamber 11 and a second chamber 12 are provided at the front end of the second insulating base 1. The two chambers are independent of each other, and the openings are both located at the front end.

[0104] In this embodiment, the first chamber 11 serves as the chamber for the discharge connector 2. The discharge connector 2 includes an independent positive discharge connector 2 and a negative discharge connector 2. The middle parts of the positive discharge connector 2 and the negative discharge connector 2 are respectively fixed within the second insulating base 1, and the front ends are respectively located within the first chamber 11. Moreover, there are gaps 22 between the positive discharge connector 2, the negative discharge connector 2 and the inner wall of the first chamber 11 respectively, for an external power plug to enter the first chamber 11 and be plugged into the discharge connector 2 within the first chamber 11 to achieve current output. The rear ends of the positive discharge connector 2 and the negative discharge connector 2 are exposed at the rear end of the second insulating base 1. Additionally, welding parts can be provided at the rear ends of the positive discharge connector 2 and the negative discharge connector 2, but not limited to this, for welding the power supply lines of external electrical equipment.

[0105] As an illustration of this embodiment, the discharge connector 2 of this embodiment can be made of copper parts, such as but not limited to copper tubes.

[0106] As an illustration of this embodiment, at least two axially extending gaps 22 can also be opened on the tube wall of the copper tube. The gaps 22 open at the front end of the discharge connector 2, and the tube wall of a relatively long section at the front end of the copper tube is separated into a plurality of metal sheets 21 surrounding a ring by the gaps 22.

[0107] As Figure 9 、 10 shown, when plugged into the external female connector 11, the discharge connector 2 of this embodiment can be inserted as a male part into the female connector 11 at the opposite end. At this time, all the metal sheets 21 of the discharge connector 2 of this embodiment radially approach, and each metal sheet 21 closely adheres to the inner wall of the plugged female connector 11 and is not prone to looseness.

[0108] As Figure 11 、 12 shown, when the male connector 9 of the plug at the opposite end is inserted into the tube of the discharge connector 2 of this embodiment, the metal sheets 21 on the inner wall of the tube cavity of the discharge connector 2 of this embodiment are subject to the radial external force of the male connector 9 and have a tendency of radial contraction, and adhere to the outer wall of the plugged male connector 9 and are not prone to looseness. The discharge connector 2 with this structure can be mated with both the male connector 9 and the female connector 11, and has high application flexibility.

[0109] In this embodiment, the second chamber 12 serves as the chamber for the charging connector 3. The charging connector 3 at least includes an independent positive charging connector 3 and a negative charging connector 3. The middle parts of the positive charging connector 3 and the negative charging connector 3 are respectively fixed in the second insulating base 1, and the front ends are separated and located in the second chamber 12. Moreover, there are gaps 22 between the positive charging connector 3, the negative charging connector 3 and the inner wall of the second chamber 12, so that an external charging plug can be inserted into the second chamber 12 from the front end to be plugged into the charging connector 3 in the second chamber 12. The rear ends of the positive charging connector 3 and the negative charging connector 3 are exposed at the rear end of the second insulating base 1, or extend out of the rear end of the second insulating base 1 through the connected conducting wires 5 for external connection.

[0110] As shown in this embodiment, a sampling connector 4 is further provided in the second chamber 12 of the plug. Similar to the positive charging connector 3 and the negative charging connector 3, the front end of the sampling connector 4 is located in the second chamber 12 and has a spacing from the inner wall of the second chamber 12. The rear end of the sampling connector 4 is exposed at the rear end of the second insulating base 1 or extends out of the rear end of the second insulating base 1 through the connected conducting wire 5 for external connection. In application, the sampling connector 4 is electrically connected to a certain predetermined electrical node in the battery pack body and the control circuit in the charge and discharge control module of the battery pack through the conducting wire 5 to sample the voltage of the electrical node, input the sampling result into the control circuit, and at the same time transfer the sampling result to the control module of the charging power supply at the opposite end (if the plug at the charging power supply end is also equipped with a sampling connector 4), so that the external charging power supply can control the output charging voltage and charging current according to the sampled voltage value of the battery pack on the side to be charged, further improving the charging balance and safety, avoiding overcharging, and increasing the service life of the battery pack.

[0111] As an illustration of this embodiment, the positive charging connector 3, the negative charging connector 3, and the sampling connector 4 of this embodiment are respectively metal connectors. The metal connector can be, but is not limited to, a solid metal piece. As a male part, it can also be, but is not limited to, a female part with an annular jack 13 fixed at the front end of the solid metal piece. The middle parts of the metal connectors are fixed in the second insulating base 1, and the front ends extend into the second chamber 12 respectively and have a spacing from the inner wall of the second chamber 12, so that the plug of an external charger can extend into the second chamber 12 to be plugged into the charging connector 3. The front end of the metal connector can be a male part (plugged into the female part at the opposite end) or a female part (plugged into the male part at the opposite end). As an illustration of this embodiment, the bare wire core at the front end of the conductive wire 5 can be clamped at the rear end of each metal connector. The wire core of the conductive wire 5 behind the bare wire core is sleeved with an insulating sleeve. A plurality of conductive wires 5 form a conductive wire harness, and the conductive wire harness extends out from the rear end of the second insulating base 1. As an illustration of this embodiment, the wire cores at the rear end of the conductive wire harness can be commonly connected to a multi-pin plug. When plugging into the charge and discharge control module of the battery pack, the plugging of a multi-pin plug realizes the electrical connection of multiple conductive wires 5, improving work efficiency and avoiding wrong connection. As an illustration of this embodiment, an anti-reverse plugging part is also provided on the multi-pin plug. Only when the anti-reverse plugging parts of the plugging pin plugs match can the plugging be successful, avoiding reverse connection.

[0112] As an illustration of this embodiment, the discharge connector 2, the charging connector 3, and the sampling connector 4 can be, but are not limited to, pre-placed in an injection mold when the second insulating base 1 is injection molded, and each connector is integrally formed on the second insulating base 1 during injection molding.

[0113] As an illustration of this embodiment, the discharge connector 2, the charging connector 3, and the sampling connector 4 can be assembled on the already formed second insulating base 1 through an assembly process. Specifically, on the second insulating base 1, a jack 13 for inserting the charging connector 3 communicating with the first chamber 11 and jacks 13 for inserting the discharge connector 2 and the sampling connector 4 communicating with the second chamber 12 are preset. There is an insertion opening at the rear end of the second insulating base 1 for the connector to be inserted into the jack 13.

[0114] As an illustration of this embodiment, an inverted positioning portion 14 is further provided on the hole wall of the jack 13 of each charging connector 3 and / or sampling connector 4. During installation, the charging connector 3 and the sampling connector 4, which clamp the conductive wire 5 at the rear end, are respectively inserted into the respective jacks 13 from the sockets at the rear end of the second insulating base 1. When the lateral locking portions 6 on the charging connector 3 and the sampling connector 4 are respectively locked to the inverted positioning portion 14 on the hole wall in a limiting manner, the charging connector 3 and the sampling connector 4 are positioned at this position, and the front ends of the charging connector 3 and the sampling connector 4 extend out of the front end of the jack 13 and are located in the second chamber 12. The adoption of the lateral locking portion 6 and the inverted positioning portion 14 is beneficial to accurate positioning during assembly, improving the assembly efficiency and assembly effect. Moreover, with this design, during the plugging and unplugging with an external charging plug, it is not easy to displace due to the plugging and unplugging force, which is beneficial to improving the durability of the product.

[0115] As an illustration of this embodiment, an introduction position 7 is further provided on the hole wall of each jack 13 for inserting the charging connector 3 and / or the sampling connector 4. The introduction position 7 is located at the rear end of the inverted positioning portion 14 and at the front end of the socket. The introduction position 7 and the inverted positioning portion 14 are respectively located on opposite hole wall sides. Taking the inverted positioning portion 14 as a lateral recess and the inverted positioning portion 14 being located on the lower hole wall of the jack 13 as an example, the introduction position 7 is located on the upper hole wall of the jack 13. In the direction from the rear to the front, the distance between the hole wall at the introduction position 7 and the opposite hole wall gradually becomes narrower. When the metal connector is inserted into the jack 13, the lateral locking portion 6 of the metal connector faces downward. The metal connector passes through the rear jack 13 through the introduction position 7, and the introduction position 7 is in close contact with the lateral introduction position 7, acting on the upper end of the metal connector. As the distance between the introduction position 7 and the opposite hole wall decreases, the introduction position 7 causes the metal connector to elastically deform and shift towards the inverted positioning portion 14 until the lateral locking portion 6 at the relatively front section of the metal connector enters the inverted positioning portion 14, and the metal connector elastically returns to its natural state, and the metal connector is positioned here. As can be seen from the above, the adoption of the introduction position 7 is beneficial to the accurate positioning of the assembly of the metal connector, improving work efficiency. As an illustration of this embodiment, a flat metal connector can be used but is not limited to this. A lateral locking portion 6 is provided on the lower surface at the relatively front section of the flat metal connector.

[0116] As an illustration of this embodiment, a limiting portion 8 with a lateral protrusion can also be provided in the middle of the discharge connector 2. During installation, the discharge connector 2 is inserted from the rear to the front until the protruding limiting portion 8 enters the laterally recessed limiting portion 8 in the jack 13, and then the discharge connector 2 stops and is positioned here.

[0117] The middle portions of the first metal connectors are limited within the second insulating base 1, the rear ends clamp the conductive wire cores connected thereto, and the front ends are conductor male plugs or conductor female plugs extending out of the second chamber.

[0118] As an illustration of this embodiment, a transfer circuit electrically connected between the charging circuit and the discharge plug is further provided on the charge and discharge control module of the battery pack. When an external charging power supply is connected to charge the battery pack, the control circuit cuts off the electrical connection between the discharge circuit and the discharge plug, and connects the transfer circuit to transfer the current input from the external charging power supply to the discharge plug, and outputs it to an external electrical device through the discharge connector to drive the electrical device to work.

[0119] As can be seen from the above, in the plug of this embodiment, independent charging sockets and discharge sockets are integrated. Moreover, the charging socket and the discharge socket are independent of each other and can be respectively plugged into the existing separate charging plug and the existing separate discharge plug alone, or can be plugged into a plug integrated with a charging plug and a discharge plug that matches the plug of this embodiment. At this time, the further application principle is described in detail in the corresponding description of the lithium-ion battery with the plug of this embodiment later.

[0120] The plug of this embodiment can be applied to a lithium-ion battery. The lithium-ion battery includes a lithium-ion battery pack body, a charge and discharge protection module, and the plug of this embodiment described above.

[0121] The lithium-ion battery pack body includes a plurality of lithium-ion battery cells, and each cell is electrically connected in series, in parallel, or in a combination of both.

[0122] The charge and discharge protection module includes a discharge circuit, a charging circuit, and a control circuit electrically connected to the discharge circuit and the charging circuit respectively. The control circuit controls the operation of the charging circuit and the discharge circuit.

[0123] Among them, the input end of the discharge circuit is electrically connected to the positive electrode and the negative electrode of the lithium-ion battery pack body, and the output end is electrically connected to the rear ends of the positive discharge connector 2 and the negative discharge connector 2 of the plug of this embodiment respectively. When the plug of this embodiment is plugged into the power plug of an external electrical device, the battery pack body is in a discharge state, and the discharge circuit outputs current externally under the control of the control circuit. Applying this solution, during the discharge process, the charging connector 3 on the plug is electrically connected to each cell and the control circuit respectively. Therefore, during the discharge process, the charging connector 3 on the plug becomes the voltage sampling circuit of each cell, and the control circuit further controls the discharge of the battery pack online according to the current voltage of each cell to balance the discharge and avoid over-discharge.

[0124] The output terminal of the charging circuit is electrically connected to the positive and negative electrodes of each lithium-ion cell within the battery pack body, and the input terminal is electrically connected to the rear end of the charging connector 3 of the plug in this embodiment. When the plug in this embodiment is plugged into an external charging power source, the charging circuit charges each lithium-ion cell under the control of the control circuit. Applying this solution, during the charging process of the battery pack, the discharge connector 2 of the plug becomes the voltage sampling circuit of the battery pack body, and the control circuit further controls the charging of each cell online according to the voltage of the battery pack body to achieve balanced charging and avoid overcharging.

[0125] As can be seen from the above, applying the plug of this embodiment in the battery pack, the plug integrates the charging plug and the discharge plug, which is beneficial for the user to connect externally and saves the plug-in occupied space. And compared with the prior art, during the charging process, the line of the discharge interface becomes the voltage sampling circuit during the charging process, and during the discharging process, the line of the charging interface becomes the voltage sampling circuit during the discharging process. The control circuit performs balanced charge and discharge control according to each voltage sampling signal, providing further balanced protection for the safety and reliability of the charging and discharging of the battery pack.

[0126] In summary, referring to Figure 22 、 23 As shown, adopting the technical solution of this embodiment, configure one of the plugs of Embodiment 1 and 2 on the lithium-ion battery, and configure the other of the plugs of Embodiment 1 and 2 as a matching adapter plug to increase the range of power supply connectors of the electrical equipment adapted to this lithium-ion battery through the adapter plug and improve the application flexibility of the battery pack.

[0127] 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: include: An insulating base, wherein a first insulating socket and a second insulating socket which are protruding forward and separated from each other are provided at the front end of the insulating base. Two jacks are provided in the first insulating socket, the front end of each jack is located at the front end of the first insulating socket, and the rear end is located at the rear end of the insulating base. At least two jacks are provided in the second insulating socket, the front opening of each jack is located at the front end of the second insulating socket, and the rear end socket is located at the rear end of the insulating base; Two discharge female connectors are respectively fixed in the two plug holes of the first insulating socket, and the front end of each discharge female connector is a tube for the male connector to be inserted, and the rear end extends out of the insulating base; The two charging female connectors are respectively fixed in the two sockets of the second insulating socket. The front end of each charging female connector is provided with a socket, which is respectively located in the socket where it is located. The rear end of each charging female connector extends out of the insulating base or extends out of the insulating base through a conductive wire.

2. The plug according to claim 1, characterized in that: Each of the discharge connector female parts is a copper part, the front end section of the copper part is a copper tube, the rear end of the copper tube is a closed end, and a welding position is also provided at the rear end of the closed end, and the welding position is located outside the insulating base.

3. The plug according to claim 1 or 2, characterized in that: It also includes at least one sampling female connector, which is fixed in the socket of the second insulating socket. The front end of each sampling female connector is provided with a socket, and the rear end extends out of the insulating base.

4. The plug according to claim 3, characterized in that: Each charging connector and sampling connector includes: A clamping portion is formed at the rear end, each of the clamping portions 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. A metal jack formed at the front end with its opening facing forward serves as a socket for external connection.

5. The plug according to claim 4, characterized in that: Each of the metal sockets is formed by bending a metal piece at the front end, and the two ends of the bent metal piece are axially opposite to each other and have a spacing. When an external male connector is inserted into the metal plug hole, the metal member forming the metal plug hole is elastically deformed to increase the distance.

6. The plug according to claim 5, characterized in that: A bent second metal piece is also provided in each of the metal sockets, wherein the front end of the second metal piece is a fixed end and the rear end is a free end. When the external male connector is inserted into the metal socket, the inserted male connector abuts against at least one bent portion of the second metal member, and the second metal member is elastically deformed under the squeezing action of the inserted male connector.

7. The plug according to claim 6, characterized in that: A first lateral window is provided on the side of the second insulating socket. Each of the metal plug holes is provided with a second lateral window portion, and each of the second lateral window portions is directly opposite to the first lateral window portion. The end section of the front end of each second metal member is bent backward, and 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 of the second metal parts. When the external male connector is inserted into the metal socket, under the action of pressure, the end of the second metal part abuts against the rear end surface of the first lateral window portion, and the second metal part elastically deforms toward the side where the second lateral window portion is located and extends backward.

8. The plug according to claim 6, characterized in that: A first lateral snap-in portion is provided on the side of each of the discharge female connectors, and a second lateral snap-in portion is provided on the wall of each of the sockets. The first lateral snap-in portion of each of the discharge female connectors is snap-fitted with the second lateral snap-in portion of the socket in which it is located.

9. A lithium ion battery, characterized in that: include: The lithium-ion battery pack body comprises a plurality of 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. A charging circuit is electrically connected to the positive electrode and the negative electrode of each of the lithium-ion batteries. A control circuit, electrically connected to the discharge circuit and the charging circuit respectively; The plug according to any one of claims 1 to 8, wherein the rear end of the charging female connector of the plug is electrically connected to the charging circuit, and the rear end of the discharging female connector of the plug is electrically connected to the discharging circuit.

10. The lithium-ion battery according to claim 9, characterized in that: The charge and discharge protection module further comprises a sampling circuit electrically connected to any electrical node in the lithium-ion battery pack body, and the sampling circuit is also electrically connected to the control circuit and the sampling connector of the plug.

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