CN117977741A - An anti-theft charger, a matching battery and an application method thereof - Google Patents

Abstract

The present application is an anti-theft charger, belonging to the technical field of electric bicycle charging, including a power charging line, a circuit board and a battery connecting line, the circuit board carries a charging system, the power charging line is connected to the AC power supply end of the charging system, the battery connecting line is connected to the charging end of the charging system, the circuit board is protected by a charger shell, the circuit board also carries an encryption module, the encryption module is provided with a switch module, the switch module is used to control the power on and off of the charging system, the encryption module is provided with a breakdown port, the breakdown port is used to mark the encryption module, the rear end of the encryption module is connected to an authentication head, the authentication head can be connected to a battery adapted to the charger, the breakdown port can overlap or separate from the authentication head, the authentication head is used to identify the battery number, when the encryption module detects that the battery matches through the authentication head, the command switch module is turned on to allow the charging system to operate normally, the application of the present application has the characteristics of high security, low production cost, high reliability and strong executability.

Description

An anti-theft charger, a matching battery and an application method thereof

Technical Field

The invention relates to the technical field of electric bicycle charging, and in particular to a charger, in particular to an anti-theft charger and a corresponding electric vehicle battery.

Background technique

Lithium batteries have the disadvantage of instability. Poor quality or aging lithium batteries may have the risk of spontaneous combustion. Therefore, various cities are promoting the action of banning electric vehicles from entering residential buildings. In many communities with a large number of electric vehicle users, electric vehicle sheds have been set up with sockets for outdoor charging of electric bicycles.

Although charging outdoors improves the overall safety of the community, sometimes the charger is taken away and used by others or even lost when the electric vehicle is charging outdoors. For a certain brand of electric vehicles that our company cooperates with, the sales volume of chargers in 2022 was about 127% of that in 2021, while the sales volume of electric vehicles was 112% of that in 2021, indicating that the loss of chargers is greater than before, and dealers have responded that some users said when they purchased them that the previous charger was lost. However, since electric bicycles themselves are a means of transportation for civilians, there is a low-priced market demand, and the charger technology is mature, the production lines of charger manufacturers are relatively solidified, and there are often problems with technology or assembly lines that have been used for five years or even earlier. Therefore, when adding anti-loss features to the power supply, the production cost needs to be controlled, and the newly added anti-loss technology should be made to match the existing assembly line as much as possible.

Summary of the invention

The present invention proposes an anti-theft charger, which can effectively solve the problem that the outdoor electric vehicle charger is easily lost, reduce the probability of loss, and has the characteristics of high safety, low production cost, high reliability and strong executability.

The technical solution of the present invention is as follows:

A theft-proof charger comprises a power charging cable, a circuit board and a battery connecting cable, wherein the circuit board carries a charging system, the power charging cable is connected to the AC power supply end of the charging system, the battery connecting cable is connected to the charging end of the charging system, the circuit board is protected by a charger housing, the circuit board also carries an encryption module, the encryption module is controlled and connected to a switch module, the switch module is used to control the power on and off of the charging system, the encryption module is provided with a breakdown port, the breakdown port is used to mark the encryption module, an authentication head is connected to the rear end of the encryption module, the authentication head can be connected to a battery adapted for the charger, the breakdown port is arranged to overlap or be separated from the authentication head, the authentication head is used to identify the battery number, the breakdown port is used to write authentication information in the encryption module, and when the encryption module detects that the battery matches through the authentication head, the command switch module is turned on to allow the charging system to operate normally.

As a further optimization of this solution, the authentication head is arranged in the battery connector of the battery connecting line, and can be connected to the corresponding charging interface of the battery along with the battery connecting line;

Alternatively, the authentication head is led out by a data line alone and can be connected to the coding port of the battery.

As a further optimization of this solution, the encryption module includes an N-phase wire, on which one end of K M-phase wires are cross-arranged, and the other end of each of the M-phase wires is communicatively connected to the authentication head. The N-phase wire can be communicatively connected to the encoding module of the battery with the help of the M-phase wire and the authentication head. There is a connection point α between x of the K M-phase wires and the N-phase wire, and the logical relationship between each connection point α on the N-phase wire is "OR" logic, and the remaining K-x wires are in an open circuit state.

As a further optimization of this solution, the encryption module also includes an N* phase conductor, the M phase conductor that does not have a connection point α with the N phase conductor has a connection point γ with the N* phase conductor, the logical relationship between each connection point γ on the N* phase conductor is an "OR" logic, and the connection relationship between the remaining M phase conductors and the N* phase conductors is in an open circuit state, and the high potential of the N* phase conductor can pull the N phase conductor to a low potential or directly put the switch module into an open circuit state.

As a further optimization of this solution, the encryption module includes y N-phase wires and K M-phase wires, and there are x connection points α at the intersection of each of the N-phase wires and the M-phase wires. The control logic of the x connection points α on the potential state of the N-phase wire is "AND" logic.

As a further optimization of this solution, an N’-phase conductor is also arranged under each of the N-phase conductors. If there is no connection point α between the M-phase conductor and the N’-phase conductor corresponding to the N-phase conductor, then there is a connection point α* between the M-phase conductor and the N’-phase conductor corresponding to the N-phase conductor, wherein the control logic of the potential state of the N’-phase conductor by the K-x connection points is an “OR” logic. When the N’-phase conductor is energized to a high potential, the corresponding N-phase conductor’s power-on command for the switch module will be shielded, and each of the N-phase conductors has a power supply connector at one end and is communicatively connected to the authentication head.

As a further optimization of this solution, the connection point between the N-phase conductor and the M-phase conductor is a selectable on-off structure, which is in an open circuit state in the original state and can be manually modified.

As a further optimization of this solution, the selectable on-off structure is two opposite diodes.

As a further optimization of this solution, each of the M-phase conductors is provided with a read-write unit at the connection with the authentication head.

As a further optimization of this solution, the charging system includes a rectifier module, a transformer module, a starting module, a switch oscillation module, a secondary power supply module, a voltage feedback module and a charging module. The input of the rectifier module is connected to the AC power supply end, the output of the rectifier module is connected to the primary side of the transformer module through the starting module, the secondary side of the transformer module is connected to the charging module, the input end of the voltage feedback module is connected to the battery connector, the output end of the voltage feedback module is connected to the reference point of the switch oscillation module, the output end of the switch oscillation module is connected to the primary side of the transformer module, the starting circuit and the secondary power supply module are connected to the switch oscillation module for power supply.

The switch side of the switch module is arranged between the secondary power supply module and a connection point between the secondary power supply module and the start-up module, and the signal receiving side of the switch module is connected to the encryption module.

A battery for an electric vehicle, which is compatible with the above-mentioned charger, comprises a battery core and a shell, wherein the battery core is connected to a charging interface, wherein the charging interface is arranged on the surface of the shell and is compatible with the charging head of the charger, wherein the battery core is also powered by a voltage stabilizer and connected to a coding module, wherein the coding module is also connected to a coding port, wherein the coding port is compatible with an authentication head, wherein the coding module is authenticated by a compatible charger with the aid of the authentication head and the coding port, and a buffer processing unit is also arranged between the coding module and the coding port.

As a further optimization of this solution, each battery is provided with a unique product code. When the coding port and the authentication head are connected, there is a powered wire in the output of the coding module. This powered wire is connected to the authentication head with a certain regular signal, and a corresponding M-phase wire is powered. The corresponding regularity of the powered wire and the M-phase wire is related to the product code of the battery or is randomly generated. There is a connection point α between the connected M-phase wire and the N-phase wire.

As a further optimization of this solution, the encoding module includes z L-phase conductors, each of which is parallel to an L*-phase conductor with an opposite potential, and the encoding module also includes K M'-phase conductors, wherein each M'-phase conductor corresponds to each M-phase conductor one by one, and the M'-phase conductor is connected to the M-phase conductor by means of the encoding port and the authentication head, and the L-phase conductor and the L*-phase conductor cross the M'-phase conductor but are insulated and isolated, and there are z connection points β at the intersection of each of the M'-phase conductors with the L-phase conductor and the L*-phase conductor, and at the M' The logical relationship between each of the connection points β on the phase conductor is an "AND" logic, and there is only one conduction point for each of the M'-phase conductors and each pair of L-phase conductors and their corresponding L*-phase conductors. The conduction point arrangement of each of the M'-phase conductors and the L-phase conductors and the L*-phase conductors is different. The connection status of each of the L-phase conductors in the encoding module corresponding to each battery to the regulator is related to the product code of its battery or is randomly generated. When the encoding port of the battery is docked with the authentication head of the corresponding charger, the M'-phase conductor is an energized conductor.

As a further optimization of this solution, K=128 or 1024, and the position of the energized M-phase conductor is related to certain bits in the product code of the battery.

As a further optimization of the present solution, each battery is provided with a unique product code, and the coding module includes x M’-phase conductors that can be energized, and the energized M’-phase conductors correspond to the positions of the x M-phase conductors with connection points α in an N-phase conductor in the encryption module in the charger, and after the coding port and the authentication head are connected to each other, the x energized M’-phase conductors in the coding module power on the x connection points α in an N-phase conductor through the x M-phase conductors in the encryption module, and the voltage stabilizing module also leads out y conductors at the coding port, and these y conductors are connected to y power supply connectors corresponding to the y N-phase conductors in the encryption module through the coding port and the authentication head.

A charger anti-theft method, comprising:

Burn the coding module in the battery, and determine the connection between the M' phase wire output from the authentication head in the coding module and the battery according to the coding rules.

Applying a burning voltage to the corresponding M-phase conductor through the breakdown port to break down or burn the encryption module in the charger so that the encryption module can match one or more codes;

The authentication head and the encoding port are connected. If the encoding module and one of the codes in the encryption module match, the encryption module starts the switch module to power the switch oscillation module, so that the charger can work normally to charge the battery.

Working principle and beneficial effects of this application:

When charging is needed, the battery connection line of the charger is inserted into the charging interface of the battery. After the rectifier module in the traditional charger rectifies the DC, it starts the switch oscillation module through the starting resistor of the starting module. The enable end of the switch chip in the switch oscillation module obtains the start command, and the switch oscillation module controls the MOS tube. The on and off of the MOS tube is controlled by the pwM signal, so that the original trigger of the current flowing through the transformer is a pwM square wave. Among them, the secondary power supply module is the core module for powering the switch oscillation module. When the charger is working stably, the secondary power supply module is required to power the switch oscillation module, so that the current in the transformer module is a changing current. The transformer in the transformer module converts the voltage, and further rectifies and filters it in the charging module to send the electrical energy to the battery to charge the battery. At the same time, the voltage feedback module can also provide feedback to the switch oscillation module through the battery power and the strength of the charging voltage to adjust the output voltage strength in the transformer module. The above is the prior art. In this case, as long as the mechanical shape of the plug is adapted, different chargers can be used for all electric bicycles.

Applying the scheme in this application, a switch module is connected in series in the secondary power supply module by means of a relay or a switch tube, wherein the switch module is controlled by an encryption module, and an encryption information is stored in the encryption module according to the number of each battery or in a randomly generated manner, and the encryption information is not necessarily unique. As long as the library of the startup information is large enough, the effect of making it difficult for the charger to match at will can be achieved. When plugging in the charging interface, the authentication head and the encoding head need to be docked, wherein the encoding module is powered by the battery core. Since the power required by the encoding module and the encryption module is extremely low relative to electric vehicles, even the power-deficient state does not affect the work of the encoding and encryption modules. The encoding module transmits the authentication code written in the factory to the encryption module in the form of an electrical signal through the authentication head. If the password matches, the encryption module starts the switch module so that the secondary power supply module normally supplies power to the switch oscillation module, thereby ensuring that the charger charges the battery normally. If the encryption module does not recognize the signal in the encoding module, the encryption module cannot be powered normally.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG1 is a block diagram of the present application;

FIG2 is a schematic diagram of the working principles of the encryption module and the encoding module of Example 1 of the present application;

FIG3 is a diagram showing the logical operation relationship between the N phase and the N* phase in Embodiments 1 and 2;

FIG4 is an exemplary circuit diagram of a control switch module circuit in Example 1;

FIG5 is a schematic diagram of the working principles of the encryption module and the encoding module of Example 2 of the present application;

FIG. 6 is a principle block diagram of the output operation logic of multiple N-phase conductors in Example 2 of the present application.

Detailed ways

The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Embodiment 1, as shown in Figure 1 of the specification, an anti-theft charger includes a power charging cable, a circuit board and a battery connecting cable, the circuit board carries a charging system, the power charging cable is connected to the AC power supply end of the charging system, the battery connecting cable is connected to the charging end of the charging system, the circuit board is protected by a charger shell, the circuit board also carries an encryption module, the encryption module control is connected to a switch module, the switch module is used to control the power on and off of the charging system, the encryption module is provided with a breakdown port, the breakdown port is used to mark the encryption module, the rear end of the encryption module is connected to an authentication head, the authentication head can be connected to a battery adapted to the charger, the breakdown port and the authentication head are overlapped or separated, the authentication head is used to identify the battery number, the breakdown port is used to write authentication information in the encryption module, when the encryption module detects the battery through the authentication head When matched, the command switch module is turned on to allow the charging system to operate normally. The charging system includes a rectifier module, a transformer module, a starting module, a switch oscillator module, a secondary power supply module, a voltage feedback module and a charging module. The input of the rectifier module is connected to the AC power supply end, the output of the rectifier module is connected to the primary side of the transformer module through the starting module, the secondary side of the transformer module is connected to the charging module, the input end of the voltage feedback module is connected to the battery connector, the output end of the voltage feedback module is connected to the reference point of the switch oscillator module, the output end of the switch oscillator module is connected to the primary side of the transformer module, the starting circuit and the secondary power supply module are powered and connected to the switch oscillator module, the switch side of the switch module is arranged between the secondary power supply module and the connection point between the secondary power supply module and the starting module, and the signal receiving side of the switch module is connected to the encryption module.

A battery for an electric vehicle, which is compatible with the above-mentioned charger, comprises a battery core and a shell, wherein the battery core is connected to a charging interface, the charging interface is arranged on the surface of the shell and is compatible with the charging head of the charger, the battery core is also powered by a voltage stabilizer and connected to a coding module, the coding module is also connected to a coding port, the coding port is compatible with an authentication head, the coding module is authenticated with a compatible charger by means of the authentication head and the coding port, and a buffer processing unit is also arranged between the coding module and the coding port.

When the present application is used, the battery connection line of the charger is inserted into the charging interface of the battery core, and the authentication head needs to be inserted into the coding port on the battery. After the plug is connected to the power supply, the rectifier module rectifies the AC power into DC, and then sends a start signal to the enable end of the switch chip in the switch oscillation module through the start module. The signal output of the switch chip in the switch oscillation module is connected to the gate of the switch tube, and the square wave signal is applied to the gate voltage to control the conduction state of the switch tube. The primary side input of the transformer module is a DC signal. Due to the action of the switch tube that is always in the on-off flashing state, the input is a pulse current. The transformer module has two output sides, one connected to the charging module to charge the battery, and the other connected to the secondary power supply module. After the secondary power supply is rectified into a stable DC, it supplies power to the switch oscillation module. When the charger is working stably, the secondary power supply module is required to supply power to the switch oscillation module. The switch side of the switch module is set at the connection between the secondary power supply module and the switch oscillation module. The controlled side of the switch module is connected to the output end of the encryption module. The signal input side of the encryption module is connected to the coding module in the battery through the authentication head and the coding port to identify the signal in the coding module and determine whether to turn on the switch module. The current in the transformer module is a changing current. The charging module further rectifies and filters the pulse voltage sent by the transformer and sends the electrical energy to the battery for charging. At the same time, the voltage feedback module can also provide feedback to the switch oscillation module through the battery power and the strength of the charging voltage to adjust the intensity of the output voltage in the transformer module.

The authentication head is arranged in the battery connector of the battery connecting line, and can be connected to the charging interface of the corresponding battery along with the battery connecting line; or the authentication head shown is led out by a data line alone, and can be connected to the coding port of the battery.

The authentication head and the coding port can use a USB interface or other communication interface that can realize signal interaction, or a special connector and plug interface. A signal line can be led out from the charger as a connector. In this case, a coding port needs to be set on the battery. The advantage of this connection method is that it does not need to change the process and equipment of the existing battery connection line and charging interface. It only needs to add a process of authentication head. It is more friendly and economical for production upgrades. The original charger generally has three leads. When adding an authentication head, the original charging head can be modified, and an authentication head can be added outside the charging lead to transmit identification information. This method does not require adding a connection line. When plugging in the charger, the user only needs to insert a charging connection line into the charging interface, which is consistent with the original charging operation. This design is better for the user experience, but it is necessary to replace the production line and production process of the charging connector of the original charger, which is a big change.

As shown in Figure 2 of the specification, the encryption module includes an N-phase wire, on which one end of K M-phase wires are cross-arranged, and the other end of each M-phase wire is communicatively connected to the authentication head. The N-phase wire can be communicatively connected to the encoding module of the battery with the help of the M-phase wire and the authentication head. There is a connection point α between x of the K M-phase wires and the N-phase wire, and the logical relationship between each connection point α on the N-phase wire is "OR" logic, and the remaining K-x wires are in an open circuit state.

Each battery is provided with a unique product code. When the coding port and the authentication head are connected, there is a powered wire in the output of the coding module. This powered wire is powered through the authentication head in a certain pattern corresponding to an M-phase wire. The corresponding pattern of the powered wire and the M-phase wire is related to the product code of the battery or randomly generated. There is a connection point α between the connected M-phase wire and the N-phase wire.

The coding module and encryption module apply this design. Each battery has a unique number during production. In order to facilitate and trace the information in the coding module, generally 1-3 bits in the battery can be set to parameters related to the information in the coding module. For example, K is 10 or 16. If there is only one connection point α between the M-phase wire and the N-phase wire, the optional positions of the connection point α of the M-phase wire are 10 or 16. In this case, if a person with ill intentions wants to take away someone else's charger for convenience, the probability that this charger matches the battery is 1/10 or 1/16, which increases the theft cost for the thief. Often in this case, each charger matches one battery.

If there are multiple electric vehicles in a family, for example, the user of the charger has 3 frequently used electric vehicles, the original charger of the battery has only one connection point α that matches the battery. In this case, the serial numbers corresponding to other vehicles can be written. As shown in FIG2, the authentication head is inserted into a special burning device. A high potential needs to be applied to the M-phase wire to be burned, and the output port of the N-phase wire is connected to a low potential to form a loop. For example, in FIG2, the original connection point α is the corresponding point of the diode DK-3. When adding connection point α for burning, for example, the connection points α that need to be added are D3 and DK. Through the authentication head and the read-write unit Each M-phase conductor is provided with a read-write unit at the connection with the authentication head, and a strong current is applied to its diode D3 and diode DK through a large voltage. The diode in the encoding module is a Schottky barrier diode. For example, when the data in the encoding module is read normally, the input of the connection point α in the encryption module is about 3V. At this time, 3V is a high potential. When burning, the burning equipment inputs a voltage of more than 5V to the diode M3 and the MK wire, so that the diode D3 and DK are broken down and become an ordinary diode, which is permanently turned on in the direction of the breakdown. At this time, it is equivalent to writing the data to be burned in the encryption module.

The encryption module also includes an N* phase conductor, an M phase conductor that does not have a connection point α with the N phase conductor, and a connection point γ with the N* phase conductor. The logical relationship between each connection point γ on the N* phase conductor is an "OR" logic, and the connection relationship between the remaining M phase conductors and the N* phase conductor is in an open circuit state. The high potential of the N* phase conductor can pull the N phase conductor to a low potential or directly put the switch module into an open circuit state.

The N* phase conductor can increase the stability of the encryption module. For example, when the user inputs a high potential in all M1-MK, if there is no N* phase conductor, a high potential will be output at the output port of the N phase conductor. Adding the N* phase conductor design can prevent this from happening. For example, if the corresponding encoding module is inserted and the output is the M3 phase conductor, at this time the diode D3 is in the on state and the diode D3* is in the off state, then the N phase output is a high potential, but the N* phase output is a low potential. At this time, the switch module can be triggered, but if there is a cracked battery, the encoding module does not exist or the encoding module is modified, each or multiple outputs are high potential. If there is no N* phase conductor, the N phase conductor will be forcibly turned on. If the N* phase conductor is added, as long as there is an unwritten code in the output, the N phase output bit will be forcibly pulled down, causing the switch module to be cut off. In one embodiment, as shown in FIG2 , for example, when the inputs of the M2 and M3 wires are both at high potential, there is a correct code, which can trigger the N-phase wire to output a high potential start signal. At this time, M2 is not the code corresponding to this charger, then D2 inputs a high potential to cut off U2* inputs a high potential to pull up the potential of the N*-phase wire. At this time, the N-phase wire and the N*-phase wire output 1 at the same time, but as shown in FIG3 , N* reverses and N outputs a low potential after an “AND” operation. Or the priority of the N*-phase wire signal is set higher than that of the N-phase, as shown in FIG4 , although N outputs 1, as long as the switch tube Q1 is turned on when the N*-phase outputs 1, the resistor R8 is much smaller than R7, and the switch tube Q1 will invalidate the input signal of the N-phase wire. In short, the logic is that as long as the N*-phase outputs a low potential, the high potential of the N-phase wire will be invalidated. The above are just two examples, and other such logical connections are also included.

The encoding module includes z L-phase conductors, each L-phase conductor is parallel to an L*-phase conductor with an opposite potential thereto, and the encoding module also includes K M'-phase conductors, wherein each M'-phase conductor corresponds to each M-phase conductor one by one, and the M'-phase conductor is connected to the M-phase conductor by means of the encoding port and the authentication head, the L-phase conductor and the L*-phase conductor cross the M'-phase conductor but are insulated and isolated, and there are z connection points β at the intersection of each M'-phase conductor with the L-phase conductor and the L*-phase conductor, and the logical relationship between each connection point β on the M'-phase conductor is "AND" logic, and there is only one conduction point for each M'-phase conductor and each pair of L-phase conductors and their corresponding L*-phase conductors, and the arrangement of the conduction points of each M'-phase conductor with the L-phase conductor and the L*-phase conductor is different, and the state of the connection regulator of each L-phase conductor in the encoding module corresponding to each battery is related to the product code of the battery or is randomly generated, and when the encoding port of the battery is connected to the authentication head of the corresponding charger, the M'-phase conductor is an energized conductor.

As shown in the upper part of FIG. 2 , at this time, each M’ phase wire is in a connection relationship with the L phase wire, so it corresponds to the input of the L phase wire of an encoding module. Each M’ wire is connected to multiple L and L* wires in a different way. Then, only one of the M’ wires corresponds to the output high potential, and the others are low potentials. The wiring conditions of the L phase wires in each battery are different, that is, the welding points are different, so the output of each line is different. In order to make the connection point β clear, a staggered and step-by-step connection method is adopted. For example, 16 M’ phase wires are connected to L For phase 1, the connection point β of the first 8 lines is at L1, and the connection point β of the last 8 lines is at L1*; for phase L2, the connection point β of M’1-M’4 and M’9-M’12 is at L2, and the remaining connection points β are at L2*; for phase L3, the connection point β of M’1-M’2, M’5-M’6, M’9-M’10, M’13-M’14 and M’17-M’18 is at L3, and the others are at L3*; for phase L4, one connection point β is alternately at L4, the other is at L4*, and so on.

K = 128 or 1024, the position of the energized M-phase conductor is related to some bits in the battery product code. Generally, a decimal integer is used, so that it can correspond to one bit in the serial number. If K is 10, if a household connects 5 batteries with different codes, that is, 5 connection points α, if others use the charger, the probability of use is 1/2; when K = 128, even if there are 10 connection points α, the probability of others using it is 1/10. Such a low probability matching rate can already increase the cost of theft to the cost of buying a new charger. If K is 1024, the matching rate is even lower.

Embodiment 2,

A theft-proof charger comprises a power charging cable, a circuit board and a battery connecting cable. The circuit board carries a charging system. The power charging cable is connected to the AC power supply end of the charging system. The battery connecting cable is connected to the charging end of the charging system. The circuit board is protected by a charger shell. The circuit board also carries an encryption module. The encryption module control is connected to a switch module. The switch module is used to control the power on and off of the charging system. The encryption module is provided with a breakdown port. The breakdown port is used to mark the encryption module. An authentication head is connected to the rear end of the encryption module. The authentication head can be connected to a battery adapted for the charger. The breakdown port and the authentication head are arranged to overlap or be separated. The authentication head is used to identify the battery number. The breakdown port is used to write authentication information in the encryption module. When the encryption module detects that the battery matches through the authentication head, the command switch module is turned on to allow the charging system to operate normally.

The authentication head is arranged in the battery connector of the battery connecting line, and can be connected to the charging interface of the corresponding battery along with the battery connecting line;

Alternatively, the authentication head shown is led out by a data line alone and can be connected to the coding port of the battery.

The charging system includes a rectifier module, a transformer module, a starting module, a switch oscillator module, a secondary power supply module, a voltage feedback module and a charging module. The input of the rectifier module is connected to the AC power supply end, the output of the rectifier module is connected to the primary side of the transformer module through the starting module, the secondary side of the transformer module is connected to the charging module, the input end of the voltage feedback module is connected to the battery connector, the output end of the voltage feedback module is connected to the reference point of the switch oscillator module, the output end of the switch oscillator module is connected to the primary side of the transformer module, the starting circuit and the secondary power supply module are connected to the switch oscillator module, the switch side of the switch module is arranged between the secondary power supply module and the connection point between the secondary power supply module and the starting module, and the signal receiving side of the switch module is connected to the encryption module.

The above principle is the same as that of Example 1 and will not be described in detail here.

As shown in Figure 3 of the specification, the encryption module includes y N-phase wires and K M-phase wires. There are x connection points α at the intersection of each N-phase wire and the M-phase wire. The control logic of the x connection points α for the potential state of the N-phase wire is "AND" logic.

An electric vehicle battery, each battery is provided with a unique product code, a coding module comprises x M'-phase conductors that can be energized, the energized M'-phase conductors correspond to the positions of x M-phase conductors with connection points α in an N-phase conductor in an encryption module in a charger, after a coding port and an authentication head are connected to each other, the x energized M'-phase conductors in the coding module are powered on for x connection points α in an N-phase conductor through the x M-phase conductors in the encryption module, a voltage stabilizing module further leads out y conductors at the coding port, and the y conductors are connected to y power supply connectors corresponding to the y N-phase conductors in the encryption module through the coding port and the authentication head.

An N'-phase conductor is also arranged under each N-phase conductor. If there is no M-phase conductor with a connection point α with an N-phase conductor, then there is a connection point α* between the M-phase conductor and the N'-phase conductor corresponding to the N-phase conductor, wherein the control logic of the potential state of the N'-phase conductor by the K-x connection points is "OR" logic. When the N'-phase conductor is energized to a high potential, the corresponding N-phase conductor's power-on command to the switch module will be shielded. Each N-phase conductor leads out a power supply connector at one end and is communicatively connected to the authentication head.

The connection point between the N-phase conductor and the M-phase conductor is a selectable on-off structure. The selectable on-off structure is in an open circuit state in an original state, and its on-off state can be modified manually.

The connection points in the N-phase conductor are related to each other as a gate. When a high potential appears at each corresponding connection point, the N-phase conductor outputs a high potential. For example, for 10 M-phase conductors, M2, M4 and M10 conductors are provided with connection points α. When 2, 4 and 10 are at high potentials, the N1 phase outputs a high voltage. As long as one of the M-phase conductors corresponding to the connection point α is at a low potential, the voltage source VCC1 will be short-circuited, thereby pulling down the output of N1.

If a matching battery is not connected, when the M-phase wire at connection point α is connected to a low potential, the N1 phase outputs a low potential; when there is no connection point α, but there is a connection point α* on the N’ phase wire, a high potential is input, and the voltage will be applied to the N’ phase output. Since the priority of N’ phase is greater than that of N phase, the output will be pulled down to ensure that the switch is controlled by the encryption module.

The switch structure can be selected as two opposite diodes. Schottky barrier diodes can be used, or fuses, MOS tubes, etc. can be used.

Each M-phase conductor is provided with a read-write unit at the connection with the authentication head. The read-write unit facilitates writing of the charger identification code and increases reliability.

As shown in FIG5 , a plurality of N-phase conductors are pre-stored in the charger. When it is necessary to add a battery code to be identified, the connection point α can be written in the blank N-phase conductor, and a higher voltage than normal operation is connected to the interface corresponding to VCC1. A high potential is connected to the M-phase conductor where the connection point α does not exist, to ensure that there is no large voltage between VCC1 and the M-phase conductor that does not need to be written, and a low voltage is applied to the M-phase conductor that needs to be written to break down the Schottky barrier diode to form a connection point α.

When writing the connection point α*, a normal high potential is connected to VCC1, and a strong voltage higher than normal operation is input to the M-phase wire where the connection point α* needs to be written, so as to break down the diode at the connection point α*.

Embodiment 3, as shown in Figure 6 of the specification, a charger anti-theft method includes:

Burn the coding module in the battery, and determine the connection between the M' phase wire output from the authentication head in the coding module and the battery according to the coding rules.

For the connection method in Example 1, determine the power supply status of each L-phase wire, and connect the battery to the L-phase wire whose logic is 1 during operation;

For the connection method in Example 2, the power ground is first connected to a high potential, and a high voltage is applied to the output end of the M’ phase conductor with a logical output of 0 during operation. Vhigh applies a breakdown voltage higher than the working high voltage, and a low voltage is applied to the output end of the M’ phase conductor with a logical output of 1 during operation to break down the corresponding Schottky diode. Then, a high voltage is applied to the output end of the M’ phase conductor with a logical output of 0 during operation, and the power ground is connected to a low potential to break down the corresponding DK*, thereby realizing the burning of the encoding module.

Apply a burning voltage to the corresponding M-phase conductor through the breakdown port to break down or burn the encryption module in the charger so that the encryption module can match one or more codes;

For Example 1, the output of the N-phase conductor is connected to a low potential, and a breakdown potential is first input directly to the M-phase conductor corresponding to the connection point α that needs to be burned to the N-direction conductor; then the N*-phase conductor is connected to a low potential, and a fusing voltage is input to the M-phase conductor whose logic output is 1 during operation, so that the corresponding U* fuse is blown to open the circuit.

For Example 2, the outputs of the N and N* phase conductors that need to be burned are disconnected, and a normal high potential is applied to the input of the M phase conductor where the connection point α does not exist, a low potential is input to the M phase conductor that needs to be burned, and a breakdown voltage is applied to the power supply output of VCC1. The connection point α is burned first; then a low potential is applied to the output end of the N* phase conductor, a normal high potential is applied to VCC1, a normal high potential is input to the input end of the M phase conductor whose logic input is 1 during operation, a breakdown voltage is input to the input end of the M phase conductor whose logic input is 0 during operation, and then the output end of the N phase conductor is connected.

Connect the authentication head and the encoding port. If the encoding module matches one of the codes in the encryption module, the encryption module starts the switch module to power the switch oscillation module, so that the charger can work normally to charge the battery.

The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims (15)

1. An anti-theft charger, comprising a power charging cable, a circuit board and a battery connecting cable, wherein the circuit board carries a charging system, the power charging cable is connected to the AC power supply end of the charging system, the battery connecting cable is connected to the charging end of the charging system, and the circuit board is protected by a charger housing. The circuit board is characterized in that the circuit board also carries an encryption module, the encryption module is controlled and connected to a switch module, the switch module is used to control the power on and off of the charging system, the encryption module is provided with a breakdown port, the breakdown port is used to mark the encryption module, the rear end of the encryption module is connected to an authentication head, the authentication head can be connected to a battery adapted for the charger, the breakdown port is overlapped with or separated from the authentication head, the authentication head is used to identify the battery number, the breakdown port is used to write authentication information in the encryption module, and when the encryption module detects that the battery matches through the authentication head, the command switch module is turned on to allow the charging system to operate normally. 2. An anti-theft charger according to claim 1, characterized in that the authentication head is arranged in the battery connector of the battery connecting line, and can be connected to the corresponding charging interface of the battery along with the battery connecting line; Alternatively, the authentication head is led out by a data line alone and can be connected to the coding port of the battery. 3. An anti-theft charger according to claim 1, characterized in that the encryption module includes an N-phase wire, one end of K M-phase wires are cross-arranged on the N-phase wire, the other end of each of the M-phase wires is communicatively connected to the authentication head, and the N-phase wire can be communicatively connected to the encoding module of the battery with the help of the M-phase wire and the authentication head. There is a connection point α between x of the K M-phase wires and the N-phase wire, and the logical relationship between each connection point α on the N-phase wire is "OR" logic, and the remaining K-x wires are in an open circuit state. 4. An anti-theft charger according to claim 3, characterized in that the encryption module also includes an N* phase wire, the M phase wire that does not have a connection point α with the N phase wire has a connection point γ with the N* phase wire, the logical relationship between each connection point γ on the N* phase wire is an "OR" logic, and the connection relationship between the remaining M phase wires and the N* phase wires is an open circuit state, and the high potential of the N* phase wire can pull the N phase wire to a low potential or directly make the switch module in an open circuit state. 5. An anti-theft charger according to claim 1, characterized in that the encryption module includes y N-phase wires and K M-phase wires, and there are x connection points α at the intersection of each of the N-phase wires and the M-phase wires, and the control logic of the x connection points α on the potential state of the N-phase wire is "AND" logic. 6. An anti-theft charger according to claim 5, characterized in that an N'-phase wire is also arranged under each of the N-phase wires, and if there is no connection point α between the M-phase wire and the N'-phase wire corresponding to the N-phase wire, then there is a connection point α* between the M-phase wire and the N'-phase wire corresponding to the N-phase wire, wherein the control logic of the potential state of the K-x connection points on the N'-phase wire is an "OR" logic, and when the N'-phase wire is energized to a high potential, the corresponding N-phase wire will shield the power-on command of the switch module, and each of the N-phase wires has a power supply connector at one end and is communicatively connected to the authentication head. 7. An anti-theft charger according to claim 3 or 5, characterized in that the connection point of the N-phase wire and the M-phase wire is a selectable on-off structure, and the selectable on-off structure is in an open circuit state in the original state, and its on-off state can be modified manually. 8. The anti-theft charger according to claim 3, characterized in that each of the M-phase wires is provided with a read-write unit at the connection with the authentication head. 9. An anti-theft charger according to claim 1, characterized in that the charging system comprises a rectifier module, a transformer module, a starting module, a switch oscillation module, a secondary power supply module, a voltage feedback module and a charging module, the input of the rectifier module is connected to the AC power supply end, the output of the rectifier module is connected to the primary side of the transformer module through the starting module, the secondary side of the transformer module is connected to the charging module, the input end of the voltage feedback module is connected to the battery connector, the output end of the voltage feedback module is connected to the reference point of the switch oscillation module, the output end of the switch oscillation module is connected to the primary side of the transformer module, the starting circuit and the secondary power supply module are connected to the switch oscillation module for power supply, The switch side of the switch module is arranged between the secondary power supply module and a connection point between the secondary power supply module and the start-up module, and the signal receiving side of the switch module is connected to the encryption module. 10. An electric vehicle battery, which is compatible with the charger described in claim 1, comprises a battery core and a shell, wherein the battery core is connected to a charging interface, and the charging interface is arranged on the surface of the shell and is compatible with the charging head of the charger, and is characterized in that the battery core is also powered by a voltage stabilizer and connected to a coding module, and the coding module is also connected to a coding port, and the coding port is compatible with an authentication head, and the coding module is authenticated by a compatible charger with the help of the authentication head and the coding port, and a buffer processing unit is also arranged between the coding module and the coding port. 11. An electric vehicle battery according to claim 10, characterized in that each battery is provided with a unique product code, and when the coding port and the authentication head are connected, there is a energized wire in the output of the coding module, and this energized wire is connected to the authentication head with a certain regular signal, and a corresponding M-phase wire is energized, and the corresponding regularity of the energization of the energized wire and the M-phase wire is related to the product code of the battery or randomly generated, and there is a connection point α between the connected M-phase wire and the N-phase wire. 12. An electric vehicle battery according to claim 11, characterized in that the encoding module includes z L-phase wires, each of the L-phase wires is parallel to an L*-phase wire with an opposite potential, and the encoding module also includes K M'-phase wires, wherein each M'-phase wire corresponds to each M-phase wire one by one, the M'-phase wire is connected to the M-phase wire by means of an encoding port and the authentication head, the L-phase wire and the L*-phase wire cross the M'-phase wire but are insulated and isolated, and there are z points at the intersection of each M'-phase wire with the L-phase wire and the L*-phase wire. The connection point β, the logical relationship between each of the connection points β on the M'-phase conductor is "AND" logic, and there is only one conduction point for each of the M'-phase conductors and each pair of L-phase conductors and their corresponding L*-phase conductors, and the conduction point arrangement of each of the M'-phase conductors and the L-phase conductors and the L*-phase conductors is different. The connection state of each L-phase conductor in the coding module corresponding to each battery is related to the product code of its battery or is randomly generated. When the coding port of the battery is docked with the authentication head of the corresponding charger, the M'-phase conductor is an energized conductor. 13. An electric vehicle battery according to claim 11, characterized in that K=128 or 1024, and the position of the energized M-phase conductor is related to certain bits in the product code of the battery. 14. An electric vehicle battery according to claim 10, characterized in that each battery is provided with a unique product code, the encoding module includes x M'-phase conductors that can be energized, the energized M'-phase conductors correspond to the positions of the x M-phase conductors with connection points α in an N-phase conductor in the encryption module in the charger, after the encoding port and the authentication head are connected to each other, the x energized M'-phase conductors in the encoding module are powered on for the x connection points α in an N-phase conductor through the x M-phase conductors in the encryption module, the voltage stabilizing module also leads out y conductors at the encoding port, and these y conductors are connected to y power supply connectors corresponding to the y N-phase conductors in the encryption module through the encoding port and the authentication head. 15. A charger anti-theft method, characterized by comprising: Burn the coding module in the battery, and determine the connection between the M' phase wire output from the authentication head in the coding module and the battery according to the coding rules. Applying a burning voltage to the corresponding M-phase conductor through the breakdown port to break down or burn the encryption module in the charger so that the encryption module can match one or more codes; The authentication head and the encoding port are connected. If the encoding module and one of the codes in the encryption module match, the encryption module starts the switch module to power the switch oscillation module, so that the charger can work normally to charge the battery.