CN216872193U - Plug, socket, plug device, charger and battery pack for lithium battery - Google Patents

Abstract

The utility model relates to a plug, a socket, a plugging device, a charger and a battery pack for a lithium battery. The plug has a pin which can form a positive pole or a negative pole and a jack which can form the other of the positive pole or the negative pole, and at least one communication pin is formed above the pin and the jack. The socket has a pin which can form a positive or negative pole and a socket which can form the other of the positive or negative pole, at least one communication socket being formed above the pin and the socket. The plug device comprises a plug and a socket which are matched with each other. The utility model can effectively avoid the risk of electric shock accidents caused by the fact that a user touches a plurality of pins to form a power-on loop in the process of charging the lithium battery, and improves the safety.

Description

Plug, socket, plug device, charger and battery pack for lithium battery

Technical Field

The utility model relates to the technical field of charging, in particular to a plug, a socket, a plugging device, a charger and a battery pack for a lithium battery.

Background

An electric vehicle, also called an electric drive vehicle or an electric drive vehicle, is a vehicle that uses a storage battery (or called a rechargeable battery) as a main energy source and converts electric energy into mechanical energy through a controller, a motor and other components. The electric vehicle has the advantages of energy conservation, environmental protection, flexibility, portability, economy, practicability and the like, and is favored by more and more users.

At present, the vehicle-mounted storage battery applied to the electric vehicle has various types such as a lead-acid battery, a lithium battery, a nickel-hydrogen battery and the like. Among them, the lithium battery is generally a lithium ion battery. In general, a lithium ion battery uses a lithium alloy metal compound as a positive electrode material and graphite as a negative electrode material, and uses a nonaqueous electrolyte. The lithium battery has the advantages of high energy density, long service life, strong power bearing capacity, environmental protection and the like. Because the electric vehicle in China has a large holding capacity, the lithium battery has great development potential in the electric vehicle industry.

Currently, a charger is generally used to charge a lithium battery of an electric vehicle. The charger generally includes an input terminal (or called power plug), an adapter, and an output terminal (or called battery plug), which are connected in series in sequence through a power cord. The input may be connected to an ac grid (typically 220V). The adapter is internally provided with a transformer, a fuse and other components so as to convert the high-voltage alternating current into low-voltage direct current through voltage limiting, current limiting and other processes. The output end is connected with a power interface of the lithium battery so as to charge the lithium battery.

In order to make the output terminal of the charger and the power interface of the lithium battery form an effective electrical connection, 2-3 protruding metal pins are usually provided on the output terminal of the charger or the power interface of the lithium battery in the prior art. When a charger is used for charging the lithium battery, a user may touch the protruding metal pins due to improper operation, and particularly special people such as the old and children have a higher risk of touching the pins. When the user touches the metal pins in the power-on condition, the human body part (such as a finger) contacting with the metal pins becomes a part of the power-on loop. Because the length of the part is shorter and the corresponding resistance is also smaller, the current is larger when the part is electrified, and the electric shock accident is easy to cause and the personal property loss is easily caused.

Accordingly, there is a need in the art for a new solution to the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems in the prior art, that is, to solve the technical problem in the prior art that the safety is poor when a lithium battery is charged, the utility model provides a plug for a lithium battery. The plug has a pin which can form either a positive or a negative pole and a socket which can form the other of said positive or negative pole, and at least one communication pin is formed above said pin and said socket.

It will be appreciated by those skilled in the art that the plug of the present invention has a pin which can form either the positive or negative pole and a socket which can form the other of the positive or negative pole, such that the plug of the present invention has a co-female configuration, i.e. the pin and socket are in the same component. Through the arrangement, the risk of electric shock accidents caused by the fact that a power-on loop is formed by touching the pins in the process that a user charges the lithium battery by using the plug disclosed by the utility model can be effectively avoided, and the safety is improved. To put it back, even if the user accidentally touches the pins of the plug, the user is not affected or damaged. The reason for this is that when a user touches the pins of the plug, the entire human body acts as a wire, and the human body contacts the ground to form a power-on loop under the power-on condition. Compared with the situation that the power-on loop is formed by touching the pins, the resistance values of the whole human body and the ground are much larger than the resistance values of the part of the human body in contact with the pins, and the current value is extremely small, so that the plug can effectively avoid or reduce the risk of electric shock accidents of a user, and has higher safety. In addition, at least one communication pin is arranged above the pin of the plug and the jack of the plug, and can be matched with a corresponding socket to form communication connection so as to obtain parameters (such as current, voltage, temperature and the like) of a circuit when the plug is plugged with the socket, thereby realizing intelligent control and further improving safety. It should be noted that, because the operating voltage of the communication pins is low (usually about 5V), even if the user touches the communication pins carelessly, no electric shock accident will occur, and the safety is good. The communication pins are arranged above the pins of the plug and the jacks of the plug, so that the structure of the plug is more compact, and the space utilization rate is improved.

In the above-described preferred embodiment of the plug for a lithium battery, the pins of the plug have a rectangular cross section, and each of the communication pins has a circular cross section. The plug pins and the communication pins in the plug are configured into different cross sections, so that the misplugging can be effectively prevented, and the safety is improved.

In the above preferred technical solution of the plug for a lithium battery, a mark corresponding to the positive electrode or the negative electrode is provided near the insertion hole of the plug. Through set up the mark that corresponds the polarity with the jack on the plug, can conveniently lay wire for the plug, prevent that positive negative pole from switching on the contrary and causing the circuit to damage, further improve the security.

In the above-described preferred embodiment of the plug for a lithium battery, the pins of the plug and each of the communication pins are configured to extend perpendicularly outward from a plug body of the plug, a plug boss is formed on the plug body to be spaced apart from and parallel to the pins of the plug and the communication pins, and the insertion hole of the plug is arranged in the plug boss. Through the arrangement, the structure of the plug can be more regular, and the stress of the plug in the process of being plugged into the socket matched with the plug can be more uniform, so that stable and firm connection can be obtained.

The utility model provides a socket for a lithium battery, aiming at solving the technical problem of poor safety when the lithium battery is charged in the prior art. The socket has a pin which can form a positive or negative pole and a socket which can form the other of the positive or negative pole, and at least one communication socket is formed above the pin and the socket. The socket of the present invention has a pin which can form a positive electrode or a negative electrode and a socket which can form the other of the positive electrode or the negative electrode, so that the socket of the present invention has a structure in which the pin and the socket are in the same socket, i.e., the pin and the socket are in the same component. Through the arrangement, the risk of electric shock accidents caused by the fact that a power-on loop is formed by touching the pins in the process that a user charges the lithium battery by using the socket can be effectively avoided, and the safety is improved. In addition, at least one communication jack is arranged above the plug pin of the socket and the jack of the socket and can be matched with a corresponding plug to form communication connection, so that intelligent control is realized, and the safety is further improved. The communication jacks are arranged above the pins of the socket and the jacks of the socket, so that the structure of the socket can be simplified, and the space utilization rate is improved.

In the above preferred embodiment of the socket for a lithium battery, the pins of the socket are configured to extend perpendicularly outward from the socket body of the socket, socket bosses are formed on the socket body, the socket bosses are spaced from and parallel to the pins of the socket, and both the jacks of the socket and the communication jacks are arranged in the socket bosses. Through foretell setting, can make the structure of socket more regular, but also can make the atress when the plug is pegged graft on the socket more even to obtain stable and firm connection.

The utility model provides a plugging device for a lithium battery, which aims to solve the technical problem of poor safety in the process of charging the lithium battery in the prior art. The plug device comprises: a plug for a lithium battery according to any one of the above; and a socket for a lithium battery according to any one of the above, the socket being configured to mate with the plug, wherein, when the plug is plugged into the socket, electrical connections may be made between the pins of the plug and the receptacles of the socket and between the pins of the socket and the receptacles of the plug, respectively, and a communication connection may be made between each of the communication pins and the corresponding communication receptacle. Through the arrangement, the plugging device can effectively avoid the risk of electric shock accidents caused by the fact that a power-on loop is formed by touching the pins when a user charges the lithium battery, and improves safety. In addition, the cooperation of the communication pins and the communication jacks can conveniently acquire the parameters of the circuit so as to realize intelligent control and further improve the safety.

In the above preferred technical solution of the plugging device for a lithium battery, the plug has the plug boss; the socket has the socket boss; the plug body of the plug is formed with a plug circumferential wall surrounding the pins of the plug, the plug boss, and each of the communication pins to define a plug insertion groove receivable in the socket boss, and the socket body of the socket is formed with a plug circumferential wall surrounding the pins of the socket and the socket boss to define a socket insertion groove receivable in the plug boss, so that when the plug is plugged in the socket, the plug circumferential wall is insertable in the socket insertion groove, and a guide face matched with the plug boss is formed on the socket insertion groove. Through the configuration, the strength of the plug and the socket can be enhanced to prolong the service life of the plug and the socket, and the contact area of the plug and the socket in plugging can be increased to obtain firmer connection. In addition, the guide surface which can be matched with the plug boss is arranged on the socket slot, so that the accuracy of inserting the plug into the socket can be improved, and the inserting efficiency is improved.

The utility model provides a charger for a lithium battery, which aims to solve the technical problem of poor safety when the lithium battery is charged in the prior art. The charger comprises a plug for a lithium battery according to any of the above. By using the plug for the lithium battery, when the lithium battery is charged by the charger, the risk of electric shock accidents caused by the fact that a user touches a plurality of pins to form a power-on loop can be effectively avoided, and the safety is improved.

In order to solve the technical problem of poor safety when the lithium battery is charged in the prior art, the utility model also provides a battery pack. This the group battery includes: at least one lithium battery; and a socket for lithium batteries according to any one of the above, the socket being configured to form an electrical connection with each of the lithium batteries. Through the configuration, the risk of electric shock accidents caused by the fact that a user touches a plurality of pins to form a power-on loop can be effectively avoided, and the safety of the battery pack during charging is improved.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of an embodiment of a plug for a lithium battery of the present invention;

fig. 2 is a schematic structural view of an embodiment of the socket for a lithium battery according to the present invention.

List of reference numerals:

10. a plug; 11. a plug body; 111. a first end face; 12. a pin of the plug; 121. a plug guide portion; 13. a jack of the plug; 14. a plug boss; 15. a plug circumferential wall; 16. a plug slot; 17. a communication pin; 17a, a first communication pin; 17b, a second communication pin; 18. a first polarity flag; 20. a socket; 21. a socket body; 211. a second end face; 22. a pin of the socket; 221. a socket guide portion; 23. a jack of the socket; 24. a socket boss; 25. a socket peripheral wall; 26. a socket slot; 261. a guide surface; 27. a communication jack; 27a, a first communication jack; 27b, a second communication jack; 28. a second polarity mark; 29a, a first hanging lug; 291a, a first mounting hole; 29b, a second suspension loop; 291b, and a second mounting hole.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to solve the technical problem of poor safety in the prior art when a lithium battery is charged, the utility model provides a plug 10 for the lithium battery. The plug 10 has a pin 12 which can form a positive or negative plug and a socket 13 which can form the other of the positive or negative plug, and at least one communication pin 17 is formed above the pin 12 of the plug and the socket 13 of the plug. The present invention also provides a socket 20 for a lithium battery. The socket 20 has a pin 22 which can form a positive or negative socket and a socket 23 which can form the other of the positive or negative socket, and at least one communication socket 27 is formed above the pin 22 of the socket and the socket 23 of the socket.

Herein, unless explicitly stated to the contrary, the term "lithium battery" refers to a lithium ion battery.

Fig. 1 is a schematic structural view of an embodiment of a plug for a lithium battery according to the present invention. As shown in fig. 1, in one or more embodiments, the plug 10 for a lithium battery of the present invention has a plug body 11 and a plug wire (not shown) connected to the plug body 11. In one or more implementations, the plug body 11 is formed by an injection molding process using a suitable resin material to reduce manufacturing costs. The resin material includes, but is not limited to, PBT (polybutylene terephthalate), PET (polyethylene terephthalate), PA (polyamide), PPS (polyphenylene sulfide), and the like. Alternatively, the plug body 11 may be made of ceramic or other suitable insulating material. Based on the orientation shown in fig. 1, the pins 12 of the plug extending outward perpendicularly to the first end surface 111 are formed on the first end surface 111 of the plug body 11 away from the paper surface. In one or more embodiments, the prongs 12 of the plug are configured to connect to a plug wire to form a negative pole. Alternatively, the pin 12 of the plug may be arranged as a positive pole. The pin 12 of the plug can be made of materials such as brass, red copper or copper galvanization, so as to obtain better conductivity and corrosion resistance. In one or more embodiments, the pins 12 of the plug have a generally rectangular cross-section. Alternatively, the pins 12 of the plug may be configured to have a circular, oval, or other suitable cross-section. In one or more embodiments, a plug guide 121 is also formed at the end of the pin 12 of the plug. Based on the orientation shown in fig. 1, the plug guide 121 is configured to form a predetermined angle with the end surface of the distal end of the pin 12 of the plug to form a substantially V-shape, i.e., the cross section of the distal end of the pin 12 of the plug is gradually reduced toward the end surface of the distal end, so that the pin 12 of the plug can be more easily inserted into a mating receptacle (e.g., the receptacle 23 of the receptacle). The predetermined angle may be 45 °, or other suitable angle greater or less than 45 °.

As shown in fig. 1, in one or more embodiments, a plug boss 14 is also formed on the plug body 11 extending perpendicularly outward from the first end face 111. In one or more embodiments, the plug boss 14 is configured to be integrally formed with the plug body 11 using an injection molding process to simplify the manufacturing process. In one or more embodiments, plug boss 14 has a generally rectangular cylindrical configuration. Alternatively, the plug bosses 14 may be provided in a cylindrical configuration or other suitable configuration. Plug insertion holes 13 extending vertically from the ends of the plug bosses 14 into the plug bosses 14 are provided in the plug bosses 14. Based on the orientation shown in fig. 1, the receptacle 13 of the plug and the pin 12 of the plug are arranged to be spaced apart from each other in the horizontal direction, and the receptacle 13 of the plug is located on the right side of the pin 12 of the plug. Alternatively, the receptacle 13 of the plug may be located to the left of the pin 12 of the plug. In one or more embodiments, the receptacle 13 of the plug has a generally rectangular cross-section. Alternatively, the receptacle 13 of the plug may also be configured to have a circular, oval or other suitably shaped cross-section. In one or more embodiments, plug metal tabs (not shown) are also provided in the receptacle 13 of the plug for connection to the plug wires. The plug metal tabs are configured to connect to a plug wire to form a positive pole. Alternatively, the plug metal lug can also be provided as a negative pole. The plug metal connecting sheet can be made of materials such as brass, red copper or copper galvanization, and the like, so that better conductivity and corrosion resistance can be obtained. In one or more embodiments, a first polarity mark 18 that indicates the polarity of the receptacle 13 of the plug is provided on the plug boss 14 near the receptacle 13 of the plug. In one or more embodiments, first polarity indicia 18 is a "+" shaped positive indicia. Alternatively, the first polarity mark 18 may also be a "-" shaped negative polarity mark. By providing the first polarity mark 18, the plug 10 can be easily wired, and the circuit damage caused by the reverse connection of the positive electrode and the negative electrode can be prevented.

With continued reference to fig. 1, in one or more embodiments, 2 communication pins 17 are also provided above the pin 12 of the plug and the socket 13 of the plug, spaced apart from each other in the horizontal direction. The communication pins 17 include a first communication pin 17a on the left side and a second communication pin 17b on the right side, based on the orientation depicted in fig. 1. In one or more embodiments, the first and second communication pins 17a, 17b have a generally circular cross-section such that the communication pins 17 and the pins 12 of the plug have different cross-sections to prevent circuit damage from misinsertion. Alternatively, the first and second communication pins 17a and 17b may be provided with a rectangular, oval or other suitable cross-section. Alternatively, the number of the communication pins 17 may be set to other suitable numbers more or less than 2, such as 1, 3, etc. In addition, the communication pins 17 are arranged above the pins 12 and the jacks 13 of the plug, so that the structure of the plug 10 can be more compact, the utilization rate of space can be improved, and the design of the plug 10 can be more reasonable.

Continuing with fig. 1, in one or more embodiments, a plug circumferential wall 15 is provided on the plug body 11 surrounding the pins 12, the plug bosses 14 and the communication pins 17 of the plug. The plug circumferential wall 15 defines a plug socket 16 on the plug body 11. The provision of the plug peripheral wall 15 reduces the likelihood of a user touching the pin 12 of the plug and also serves to protect the internal components for an extended service life. In one or more embodiments, the plug circumferential wall 15 may be integrally formed with the plug body 11 using an injection molding process to simplify the manufacturing process. Further, the plug circumferential wall 15 is configured to be integrated with the plug boss 14, which can not only enhance the strength of the plug boss 14, but also enhance the rigidity of the plug circumferential wall 15 to prevent it from being deformed during the plugging process. In one or more embodiments, as shown in fig. 1, the plug peripheral wall 15 has a profile with a trapezoidal upper portion and a rectangular lower portion, such that the plug 10 has a specific shape that prevents the plug 10 from being mis-plugged into other non-matching receptacles, thereby causing circuit damage. In addition, the configuration can also enable the plug 10 to have a non-centrosymmetric profile, thereby facilitating the plug 10 to be correctly plugged into a matched socket, preventing the plug from being mistakenly plugged and improving the plugging efficiency.

Fig. 2 is a schematic structural view of an embodiment of the socket for a lithium battery according to the present invention. As shown in fig. 2, in one or more embodiments, the socket 20 for a lithium battery of the present invention has a socket body 21 and a socket wire (not shown) connected to the socket body 21. In one or more implementations, the socket body 21 is formed by an injection molding process using a suitable resin material to reduce manufacturing costs. The resin material includes, but is not limited to, PBT (polybutylene terephthalate), PET (polyethylene terephthalate), PA (polyamide), PPS (polyphenylene sulfide), and the like. Alternatively, the socket body 21 may be made of ceramic or other suitable insulating material. Based on the orientation shown in fig. 2, the pins 22 of the socket, which extend outward perpendicular to the second end face 211, are formed on the second end face 211 of the socket body 21, which is away from the paper surface. In one or more embodiments, the prongs 22 of the receptacle are configured to connect to a receptacle cord to form a positive pole so that when the prongs 22 of the receptacle are plugged into the receptacle 13 of the plug, they can make contact with the plug metal tabs to form an electrical connection. Alternatively, the pins 22 of the receptacle may be configured as negative poles, so long as they match the polarity of the metallic tabs of the plug. The pins 22 of the socket can be made of brass, red copper, or copper-plated zinc to obtain better conductivity and corrosion resistance. In one or more embodiments, the prongs 22 of the receptacle have a generally rectangular cross-section. Alternatively, the prongs 22 of the receptacle may be configured to have a circular, oval or other suitable cross-section so long as they are capable of mating with the receptacles 13 of the plug. In one or more embodiments, socket guides 221 are also formed at the ends of the pins 22 of the socket. Based on the orientation shown in fig. 2, the socket guide 221 is configured to form a predetermined angle with the distal end surfaces of the pins 22 of the socket to form a substantially V-shape, i.e., the cross-section of the distal ends of the pins 22 of the socket is gradually reduced toward the distal end surfaces, so that the pins 22 of the socket can be more easily inserted into the insertion holes 13 of the plug. The predetermined angle may be 45 °, or other suitable angle greater or less than 45 °.

In one or more embodiments, as shown in fig. 2, a vertically outwardly extending receptacle boss 24 is provided on a second end surface 211 of the receptacle body 21 facing away from the page. In one or more embodiments, the socket boss 24 is configured to be integrally formed with the socket body 21 using an injection molding process to simplify the manufacturing process and facilitate manufacturing. In one or more embodiments, as shown in fig. 2, the receptacle bosses 24 have a shape that is trapezoidal on the top and rectangular on the bottom, such that the receptacle bosses 24 can mate with the plug slots 16 of the plug 10. In addition, the receptacle bosses 24 are configured to be spaced apart from the prongs 22 of the receptacle in both the horizontal and vertical directions so that the plug 10 may be conveniently plugged into the receptacle 20 without interference. In one or more embodiments, receptacle jacks 23 are provided on receptacle bosses 24 that extend perpendicularly from the ends of receptacle bosses 24 into receptacle bosses 24. Based on the orientation shown in fig. 2, the receptacle 23 of the socket is located to the right of the pins 22 of the socket. Alternatively, the receptacles 23 of the socket may be located to the left of the pins 22 of the socket. In one or more embodiments, the receptacle 23 of the receptacle has a generally rectangular cross-section. Alternatively, the receptacle 23 of the receptacle may also be configured to have a circular, oval or other suitably shaped cross-section. In one or more embodiments, receptacle metal tabs (not shown) are also provided in the receptacle 23 of the receptacle to connect with the receptacle wires to form the negative pole. Alternatively, the receptacle metal tabs may also be provided as positive poles. The socket metal connecting sheet can be made of materials such as brass, red copper or copper galvanization, and the like, so that better conductivity and corrosion resistance can be obtained. In one or more embodiments, a second polarity mark 28 is provided on the receptacle boss 24 adjacent to the receptacle 23 to indicate the polarity of the receptacle 23. In one or more embodiments, the second polarity indicia 28 is a negative sign of a "-" shape. Alternatively, the second polarity mark 28 may also be a "+" shaped positive mark. By providing the second polarity mark 28, the socket 20 can be easily wired, and the circuit can be prevented from being damaged due to the reverse connection of the positive and negative electrodes.

With continued reference to fig. 2, in one or more embodiments, 2 communication jacks 27 are provided on the receptacle boss 24 and positioned above the prongs 22 of the receptacle and the jacks 23 of the receptacle and spaced apart from each other in the horizontal direction. Based on the orientation depicted in fig. 2, the communication jacks 27 include a first communication jack 27a on the left and a second communication jack 27b on the right. In one or more embodiments, the first and second communication jacks 27a, 27b have a generally circular cross-section. Alternatively, the first and second communication jacks 27a and 27b may be configured with rectangular, oval, or other suitable cross-sections. Alternatively, the number of communication jacks 27 may be set to other suitable numbers, such as 1, 3, etc., more or less than 2. The communication pins 17 and the communication jacks 27 are arranged to form communication connection between the plug 10 and the socket 20, so as to conveniently acquire various parameters of the circuit, such as voltage, current, temperature and the like, thereby realizing intelligent control and further improving the safety of the charging process. In addition, the communication jack 27 is disposed above the pins 22 and the jacks 23 of the socket, so that the structure of the socket 20 can be more compact to improve the utilization of space.

With continued reference to fig. 2, in one or more embodiments, a receptacle circumferential wall 25 is provided on the receptacle body 21 surrounding the prongs 22, receptacle bosses 24 of the receptacle. In one or more embodiments, the receptacle circumferential wall 25 may be integrally formed with the receptacle body 21 using an injection molding process to simplify the manufacturing process. As shown in fig. 2, the receptacle circumferential wall 25 defines a receptacle slot 26 on the receptacle body 21. In one or more embodiments, the receptacle slots 26 have a shape that is trapezoidal at the upper portion and rectangular at the lower portion to mate with the plug peripheral wall 15 of the plug 10. A guide surface 261 is formed on the receptacle insertion groove 26 to be engaged with the plug peripheral wall 15, and the plug peripheral wall 15 of the plug 10 can be easily inserted into the receptacle insertion groove 26. The design of the socket slot 26 with a specific shape can not only prevent other unmatched plugs from being inserted by mistake, but also increase the contact area between the plug 10 and the socket 20 to form stable and firm connection, and also play a role in guiding and improving the accuracy of plugging.

With continued reference to fig. 2, in one or more embodiments, first and second lugs 29a and 29b are also disposed on the left and right sides of the receptacle body 21, respectively, and are opposite to each other. The first and second hanging lugs 29a and 29b are each configured in a substantially triangular shape. Alternatively, the first and second lugs 29a, 29b may be configured in a rectangular, semi-circular, or other suitable shape. A first mounting hole 291a having a substantially circular shape is formed in the first hanger 29a, and a second mounting hole 291b having a substantially circular shape is also formed in the second hanger 29 b. The first and second mounting holes 291a and 291b may be respectively engaged with mounting members (not shown) so that the socket 20 may be detachably fixed to other suitable members, such as a frame of an electric vehicle.

In one or more embodiments, the present invention also provides a plug-in device (not shown) for a lithium battery. The plug device comprises a plug 10 and a mating receptacle 20 as described in any of the above embodiments, such that when the plug 10 is plugged into the receptacle 20, electrical connections can be made between the pins 12 of the plug and the receptacles 23 of the receptacle and between the pins 22 of the receptacle and the receptacles 13 of the plug, respectively, and a communication connection can be made between each communication pin 17 and the corresponding communication receptacle 27.

In one or more embodiments, the present invention also provides a charger (not shown) for a lithium battery. The charger comprises the plug 10, the adapter, the power plug and the power cord which are connected in series in sequence in any embodiment. The power plug is configured to plug into a receptacle connected to an ac power grid. The adapter is configured to adjust the voltage of the ac power grid (typically 220V) to a suitable output voltage, for example 57V, or other suitable voltage greater or less than 57V, by voltage limiting, current limiting, etc.

In one or more embodiments, the present invention also provides a battery pack (not shown). The battery pack includes the receptacle 20 described in any of the above embodiments. In one or more embodiments, the battery pack has 4 lithium batteries connected in series to form a nominal voltage of 48V. Alternatively, the number of lithium batteries may be set to other suitable numbers more or less than 4, such as 3, 5, etc. The socket 20 is configured to make electrical connection with each lithium battery in order to charge it.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.

Claims (10)

1. A plug for a lithium battery, wherein the plug has a pin which can form a positive electrode or a negative electrode and a socket which can form the other of the positive electrode or the negative electrode, and at least one communication pin is formed above the pin and the socket.

2. The plug for a lithium battery as claimed in claim 1, wherein the pins of the plug have a rectangular cross section and each of the communication pins has a circular cross section.

3. The plug for a lithium battery as claimed in claim 1, wherein a mark corresponding to the positive electrode or the negative electrode is provided in the vicinity of the insertion hole of the plug.

4. The plug for a lithium battery as claimed in claim 1, wherein the pins of the plug and each of the communication pins are configured to extend perpendicularly outwardly from a plug body of the plug, on which plug bosses are formed spaced apart from and parallel to the pins of the plug and the communication pins, the insertion holes of the plug being arranged within the plug bosses.

5. A socket for a lithium battery, wherein the socket has a pin which can form a positive electrode or a negative electrode and a socket which can form the other of the positive electrode or the negative electrode, and at least one communication socket is formed above the pin and the socket.

6. The socket for a lithium battery as claimed in claim 5, wherein the pins of the socket are configured to extend perpendicularly outwardly from a socket body of the socket, socket bosses spaced apart from and parallel to the pins of the socket are formed on the socket body, and both the insertion holes of the socket and the communication insertion holes are arranged in the socket bosses.

7. A plug device for a lithium battery, the plug device comprising:

the plug for a lithium battery as claimed in any one of claims 1 to 4; and

the socket for a lithium battery according to claim 5 or 6, the socket being configured to mate with the plug,

wherein, when the plug is plugged into the socket, electrical connection can be respectively formed between the pins of the plug and the jacks of the socket and between the pins of the socket and the jacks of the plug, and communication connection can be formed between each communication pin and the corresponding communication jack.

8. The plugging device for a lithium battery as claimed in claim 7,

the plug has a plug boss;

the socket has a socket boss;

the plug body of the plug is formed with a plug circumferential wall surrounding the pins of the plug, the plug boss, and each of the communication pins to define a plug insertion groove receivable in the socket boss, and the socket body of the socket is formed with a plug circumferential wall surrounding the pins of the socket and the socket boss to define a socket insertion groove receivable in the plug boss, so that when the plug is plugged in the socket, the plug circumferential wall is insertable in the socket insertion groove, and a guide face matched with the plug boss is formed on the socket insertion groove.

9. A charger for lithium batteries, characterized in that it comprises a plug according to any one of claims 1 to 4.

10. A battery pack, characterized in that the battery pack comprises:

at least one lithium battery; and

the socket for lithium batteries according to claim 5 or 6, which is configured to be electrically connectable with each of the lithium batteries.

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