A lithium battery protection board with multiple safety protection mechanisms

Abstract

The present invention belongs to the technical field of lithium battery protection, and provides a lithium battery protection board with multiple safety protection mechanisms, including: a protection board body, a safety protection control circuit arranged on the protection board body, and a processor arranged on the protection board body, wherein the processor is connected to the safety protection control circuit; and the processor controls the safety protection control circuit to realize multiple safety protections for the lithium battery. The present invention realizes multiple safety protections for the lithium battery by arranging a safety protection control circuit and a processor on the lithium battery protection board, and controlling the safety protection control circuit by the processor, which can expand the protection function of the lithium battery protection board and improve the multiple safety protection levels for the lithium battery.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery protection boards, and in particular to a lithium battery protection board with multiple safety protection mechanisms. Background Art

[0002] With the advancement of science and technology and the development of electronic technology, more and more electronic devices need to be powered by batteries. Existing batteries include lithium batteries, lead-acid batteries, etc., especially lithium batteries are widely used in various electronic devices;

[0003] In order to protect the lithium battery, a lithium battery protection board needs to be configured, but the existing lithium battery protection board has limited protection functions, especially the protection of the functional safety of the lithium battery is not comprehensive enough, resulting in poor safety in the use of lithium batteries.

[0004] Therefore, it is necessary to provide a lithium battery protection board with multiple safety protection mechanisms. Summary of the invention

[0005] The present invention provides a lithium battery protection board with multiple safety protection mechanisms. By arranging a safety protection control circuit and a processor on the lithium battery protection board, the processor controls the safety protection control circuit to achieve multiple safety protections for the lithium battery, thereby expanding the protection function of the lithium battery protection board and improving the various safety protection levels for the lithium battery.

[0006] The present invention provides a lithium battery protection board with multiple safety protection mechanisms, comprising: a protection board body, a safety protection control circuit arranged on the protection board body, and a processor arranged on the protection board body, wherein the processor is connected to the safety protection control circuit; the processor controls the safety protection control circuit to realize multiple safety protections for the lithium battery.

[0007] Furthermore, the material of the protection board body is a flexible circuit full-soft board, a soft-rigid combination board or a glass fiber reinforced epoxy resin substrate board.

[0008] Furthermore, the safety protection control circuit includes a charging overvoltage protection subcircuit, a charging overcurrent protection subcircuit, a charging high and low temperature protection subcircuit, a discharge overvoltage protection subcircuit, a discharge overcurrent protection subcircuit, a short circuit protection subcircuit, a discharge high and low temperature protection subcircuit, a battery temperature detection subcircuit, a passive balancing overcharging subcircuit, an ID identification startup subcircuit and a fault alarm subcircuit.

[0009] Furthermore, it also includes a current detection component, a voltage detection component and a temperature detection component; the current detection component, the voltage detection component and the temperature detection component are configured on the protection board body; the current detection component, the voltage detection component and the temperature detection component are respectively connected to the processor.

[0010] Further, the current detection component is used to detect the charging current, discharging current and passive balancing charging current of the lithium battery, obtain the charging current data, discharging current data and passive balancing charging current data, and send the charging current data, discharging current data and passive balancing charging current data to the processor;

[0011] The voltage detection component is used to detect the charging voltage and discharging voltage of the lithium battery, obtain the charging voltage data and the discharging voltage data, and send the charging voltage data and the discharging voltage data to the processor;

[0012] A temperature detection component is used to detect the high and low charging temperatures, high and low discharging temperatures and battery temperature of the lithium battery, obtain the high and low charging temperature data, the high and low discharging temperature data and the battery temperature data, and send the high and low charging temperature data, the high and low discharging temperature data and the battery temperature data to the processor;

[0013] The processor performs threshold comparison according to the charging current data, the discharging current data, the passive balancing charging current data, the charging voltage data, the discharging voltage data, the charging high and low temperature data, the discharging high and low temperature data and the battery temperature data; and obtains a comparison result based on a set threshold comparison program and a plurality of classification comparators set in the processor;

[0014] Among them, the setting of the threshold comparison program includes: setting multiple current thresholds, voltage thresholds and temperature thresholds; constructing a threshold database based on the current thresholds, voltage thresholds and temperature thresholds; generating a threshold comparison program according to the threshold data in the threshold database and the set threshold data comparison order.

[0015] Furthermore, it also includes a signal generating circuit, which is connected to the processor; the signal generating circuit is used to generate a number of control signals according to the comparison results, and generate multiple control commands according to the control signals; according to the control commands, the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit and the fault alarm subcircuit are controlled to operate.

[0016] Furthermore, the ID identification power-on subcircuit is provided with an ID identification component, which is connected to the processor. The ID identification component is used to identify the user's identity information and generate a first identification signal based on the correct identity information obtained by identification; the processor generates a power-on control command based on the first identification signal, and controls the power-on operation of the lithium battery corresponding to the protection board body according to the power-on control command.

[0017] Furthermore, it also includes a battery string number detection and identification circuit, which is used to detect the number of battery strings in the startup operation to obtain the number of battery strings, and generate a second identification signal based on the number of battery strings; the processor adjusts the settings of the current threshold, voltage threshold and temperature threshold in the threshold database based on the second identification signal.

[0018] Furthermore, it also includes a test subcircuit and a test signal generating subcircuit, the test subcircuit is connected to the processor and the safety protection control circuit respectively; the test subcircuit is connected to the test signal generating subcircuit;

[0019] The test subcircuit includes a plurality of test switches, which are respectively connected to a charging overvoltage protection subcircuit, a charging overcurrent protection subcircuit, a charging high and low temperature protection subcircuit, a discharging overvoltage protection subcircuit, a discharging overcurrent protection subcircuit, a short circuit protection subcircuit, a discharging high and low temperature protection subcircuit, a battery temperature detection subcircuit, a passive balancing overcharge subcircuit, an ID identification startup subcircuit, and a fault alarm subcircuit;

[0020] The processor is configured with a plurality of test signal input terminals, which are correspondingly connected to a plurality of test signal output terminals of the test signal generating subcircuit; the processor is also configured with a plurality of test control signal output ports, which are correspondingly connected to the test switches;

[0021] The test signal generating subcircuit is used to receive the test instructions input by the user and generate multiple test signals according to the test instructions; the processor controls the corresponding test switch to close according to the received test signal to realize the testing of multiple preset circuit working parameters of the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit, the ID identification startup subcircuit and the fault alarm subcircuit.

[0022] Furthermore, it also includes a sleep control circuit, which is connected to the safety protection control circuit and the processor respectively; the sleep signal input end of the processor is connected to the enable detection end of the sleep control circuit, and the sleep signal output end of the processor is connected to the enable control end of the sleep control circuit; the controller receives the current enable state signal of the sleep control circuit through the sleep signal input end, generates an enable signal and sends it to the enable control end of the sleep control circuit through the sleep signal output end; and starts the high-speed external clock source gating process in the processor, and according to the set allocation process, wakes up the sleep of the charging overvoltage protection subcircuit, charging overcurrent protection subcircuit, charging high and low temperature protection subcircuit, discharge overvoltage protection subcircuit, discharge overcurrent protection subcircuit, short circuit protection subcircuit, discharge high and low temperature protection subcircuit, battery temperature detection subcircuit, passive balancing overcharging subcircuit and fault alarm subcircuit in the sleep control circuit, so as to realize that the safety protection control circuit remains in a working state that satisfies the power not exceeding the set power threshold.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects: by arranging a safety protection control circuit and a processor on a lithium battery protection board, multiple safety protections for the lithium battery are achieved by controlling the safety protection control circuit through the processor, the protection function of the lithium battery protection board can be expanded, and the various safety protection levels for the lithium battery can be improved.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the structure of a lithium battery protection board with multiple safety protection mechanisms;

[0028] Figure 2 It is a schematic diagram of the structure of the safety protection control circuit;

[0029] Figure 3 This is a schematic diagram of the connection structure between the safety protection control circuit and the processor;

[0030] Figure 4 Schematic diagram of the steps for component identification. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] The present invention provides a lithium battery protection board with multiple safety protection mechanisms, such as Figure 1 As shown, it includes: a protection board body, a safety protection control circuit arranged on the protection board body, and a processor arranged on the protection board body, the processor is connected to the safety protection control circuit; the processor controls the safety protection control circuit to realize multiple safety protections for the lithium battery.

[0033] The working principle of the above technical solution is: in order to realize a lithium battery protection board with multiple safety protection mechanisms, the present invention proposes a protection board body, a safety protection control circuit arranged on the protection board body, and a processor arranged on the protection board body, and the processor is connected to the safety protection control circuit; the processor controls the safety protection control circuit to realize multiple safety protections for the lithium battery.

[0034] The beneficial effects of the above technical solution are: by setting a safety protection control circuit and a processor on the lithium battery protection board, multiple safety protections for the lithium battery can be achieved by controlling the safety protection control circuit through the processor, the protection function of the lithium battery protection board can be expanded, and the various safety protection levels for the lithium battery can be improved.

[0035] In one embodiment, the material of the protection board body is a flexible circuit full-soft board, a soft-rigid combination board, or a glass fiber reinforced epoxy resin substrate board.

[0036] The working principle of the above technical solution is: selecting the material of the protection board body from a flexible circuit full-soft board, a soft-hard combination board or a glass fiber reinforced epoxy resin substrate board will help improve the quality of the protection board and protect the lithium battery through the protective material.

[0037] The beneficial effect of the above technical solution is that by selecting the material of the lithium battery protection plate, effective protection of the lithium battery can be achieved.

[0038] In one embodiment, Figure 2 As shown, the safety protection control circuit includes a charging overvoltage protection subcircuit, a charging overcurrent protection subcircuit, a charging high and low temperature protection subcircuit, a discharge overvoltage protection subcircuit, a discharge overcurrent protection subcircuit, a short circuit protection subcircuit, a discharge high and low temperature protection subcircuit, a battery temperature detection subcircuit, a passive balancing overcharging subcircuit, an ID identification startup subcircuit and a fault alarm subcircuit.

[0039] The working principle of the above technical scheme is: the safety protection control circuit is divided into a charging overvoltage protection subcircuit, a charging overcurrent protection subcircuit, a charging high and low temperature protection subcircuit, a discharge overvoltage protection subcircuit, a discharge overcurrent protection subcircuit, a short circuit protection subcircuit, a discharge high and low temperature protection subcircuit, a battery temperature detection subcircuit, a passive balancing overcharge subcircuit, an ID identification startup subcircuit and a fault alarm subcircuit, which can realize multiple safety protections for lithium batteries.

[0040] The beneficial effect of the above technical solution is that multiple safety protection sub-circuits can be distinguished and set to achieve multiple safety protections for lithium batteries.

[0041] In one embodiment, Figure 3 As shown, it also includes a current detection component, a voltage detection component and a temperature detection component; the current detection component, the voltage detection component and the temperature detection component are configured on the protection board body; the current detection component, the voltage detection component and the temperature detection component are respectively connected to the processor.

[0042] The working principle of the above technical solution is: by setting a current detection component, a voltage detection component and a temperature detection component; the current detection component, the voltage detection component and the temperature detection component are configured on the protection board body; the current detection component, the voltage detection component and the temperature detection component are respectively connected to the processor, which can realize effective detection of the current, voltage and temperature in the safety protection control circuit.

[0043] The beneficial effect of the above technical solution is that by setting a current detection component, a voltage detection component and a temperature detection component, effective detection of the current, voltage and temperature in the safety protection control circuit can be achieved.

[0044] In one embodiment, the current detection component is used to detect the charging current, discharging current and passive balancing charging current of the lithium battery, obtain the charging current data, the discharging current data and the passive balancing charging current data, and send the charging current data, the discharging current data and the passive balancing charging current data to the processor;

[0045] The voltage detection component is used to detect the charging voltage and discharging voltage of the lithium battery, obtain the charging voltage data and the discharging voltage data, and send the charging voltage data and the discharging voltage data to the processor;

[0046] A temperature detection component is used to detect the high and low charging temperatures, high and low discharging temperatures and battery temperature of the lithium battery, obtain the high and low charging temperature data, the high and low discharging temperature data and the battery temperature data, and send the high and low charging temperature data, the high and low discharging temperature data and the battery temperature data to the processor;

[0047] The processor performs threshold comparison according to the charging current data, the discharging current data, the passive balancing charging current data, the charging voltage data, the discharging voltage data, the charging high and low temperature data, the discharging high and low temperature data and the battery temperature data; and obtains a comparison result based on a set threshold comparison program and a plurality of classification comparators set in the processor;

[0048] Among them, the setting of the threshold comparison program includes: setting multiple current thresholds, voltage thresholds and temperature thresholds; constructing a threshold database based on the current thresholds, voltage thresholds and temperature thresholds; generating a threshold comparison program according to the threshold data in the threshold database and the set threshold data comparison order.

[0049] The working principle of the above technical solution is as follows: the current detection component in the present invention is used to detect the charging current, discharging current and passive balancing charging current of the lithium battery, obtain the charging current data, discharging current data and passive balancing charging current data, and send the charging current data, discharging current data and passive balancing charging current data to the processor; the voltage detection component is used to detect the charging voltage and discharging voltage of the lithium battery, obtain the charging voltage data and discharging voltage data, and send the charging voltage data and discharging voltage data to the processor; the temperature detection component is used to detect the charging high and low temperatures, discharging high and low temperatures and battery temperature of the lithium battery, obtain the charging high and low temperature data, discharging high and low temperature data and battery temperature data, and send the charging high and low temperature data, discharging high and low temperature data and battery temperature data to the processor;

[0050] According to the above charging current data, discharging current data, passive balancing charging current data, charging voltage data, discharging voltage data, charging high and low temperature data, discharging high and low temperature data and battery temperature data; the processor uses multiple classification comparators to perform threshold comparison according to the set threshold comparison program to obtain a comparison result; wherein, the setting of the threshold comparison program includes: setting multiple current thresholds, voltage thresholds and temperature thresholds; constructing a threshold database according to the current threshold, voltage threshold and temperature threshold; generating a threshold comparison program according to the threshold data in the threshold database and the set threshold data comparison order.

[0051] The beneficial effect of the above technical solution is that by analyzing and comparing the data, it is easy to obtain the comparison result for use in controlling the execution of the function of the safety control circuit.

[0052] In one embodiment, it also includes a signal generating circuit, which is connected to the processor; the signal generating circuit is used to generate a number of control signals according to the comparison results, and generate a plurality of control commands according to the control signals; according to the control commands, the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit and the fault alarm subcircuit are controlled to operate.

[0053] The working principle of the above technical solution is: by setting a signal generating circuit, the signal generating circuit is connected to the processor; according to the comparison result, a number of control signals can be generated, and according to the control signal, a plurality of control commands can be generated; according to the control command, the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharge subcircuit and the fault alarm subcircuit are controlled to work.

[0054] The beneficial effect of the above technical solution is: by setting up a signal generating circuit, a basis is provided for the generation of control commands, thereby facilitating the control of the safety protection control circuit.

[0055] In one embodiment, Figure 4 As shown, the ID identification power-on subcircuit is provided with an ID identification component, the ID identification component is connected to the processor, the ID identification component is used to identify the user's identity information, and generate a first identification signal according to the correct identity information obtained by identification; the processor generates a power-on control command according to the first identification signal, and controls the lithium battery corresponding to the protection board body to start working according to the power-on control command.

[0056] The working principle of the above technical solution is: the ID identification component configured in the ID identification startup subcircuit can identify the user's identity information, and generate a first identification signal based on the correct identity information obtained by identification; the processor generates a startup control command based on the first identification signal, and controls the startup of the lithium battery corresponding to the protection board body according to the startup control command.

[0057] The beneficial effect of the above technical solution is that through the function of the ID recognition component, the user's identity information can be identified, which facilitates the protection of the lithium battery when it is turned on.

[0058] In one embodiment, it also includes a battery string number detection and identification circuit, which is used to detect the number of battery strings in the startup operation to obtain the number of battery strings, and generate a second identification signal based on the number of battery strings; the processor adjusts the settings of the current threshold, voltage threshold and temperature threshold in the threshold database based on the second identification signal.

[0059] The working principle of the above technical solution is as follows: the present invention sets up a battery string number detection and identification circuit to detect the number of battery strings for startup work to obtain the number of battery strings, and generates a second identification signal according to the number of battery strings; the processor adjusts the settings of the current threshold, voltage threshold and temperature threshold in the threshold database according to the second identification signal.

[0060] The beneficial effect of the above technical solution is that by identifying different numbers of battery strings, the settings of the current threshold, voltage threshold and temperature threshold in the threshold database can be adjusted in a targeted manner to meet the requirements of safety control.

[0061] In one embodiment, it also includes a test subcircuit and a test signal generation subcircuit, the test subcircuit is connected to the processor and the safety protection control circuit respectively; the test subcircuit is connected to the test signal generation subcircuit;

[0062] The test subcircuit includes a plurality of test switches, which are respectively connected to a charging overvoltage protection subcircuit, a charging overcurrent protection subcircuit, a charging high and low temperature protection subcircuit, a discharging overvoltage protection subcircuit, a discharging overcurrent protection subcircuit, a short circuit protection subcircuit, a discharging high and low temperature protection subcircuit, a battery temperature detection subcircuit, a passive balancing overcharge subcircuit, an ID identification startup subcircuit, and a fault alarm subcircuit;

[0063] The processor is configured with a plurality of test signal input terminals, which are correspondingly connected to a plurality of test signal output terminals of the test signal generating subcircuit; the processor is also configured with a plurality of test control signal output ports, which are correspondingly connected to the test switches;

[0064] The test signal generating subcircuit is used to receive the test instructions input by the user and generate multiple test signals according to the test instructions; the processor controls the corresponding test switch to close according to the received test signal to realize the testing of multiple preset circuit working parameters of the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit, the ID identification startup subcircuit and the fault alarm subcircuit.

[0065] The working principle of the above technical solution is as follows: in order to ensure that the functions of the safety protection control circuit are effectively exerted, a test subcircuit and a test signal generating subcircuit need to be set up. The test subcircuit set up in the present invention is respectively connected to the processor and the safety protection control circuit; the test subcircuit is connected to the test signal generating subcircuit; the test subcircuit includes a plurality of test switches, and the plurality of test switches are respectively connected to the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit, the ID identification startup subcircuit and the fault alarm subcircuit; the processor is configured with a plurality of test signal input terminals, which are connected to the test signal The multiple test signal output ends of the generating subcircuit are connected correspondingly; the processor is also configured with multiple test control signal output ports, and the test control signal output ports are connected correspondingly to the test switches; the test signal generating subcircuit is used to receive the test instructions input by the user, and generate multiple test signals according to the test instructions; the processor controls the corresponding test switch to close according to the received test signal to realize the testing of multiple preset circuit working parameters of the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit, the ID identification startup subcircuit and the fault alarm subcircuit.

[0066] The beneficial effect of the above technical solution is: according to the set test sub-circuit and test signal generation sub-circuit, multiple preset circuit operating parameters in the safety protection control circuit can be tested, which helps to ensure the normal and stable operation of the safety protection control circuit.

[0067] In one embodiment, it also includes a sleep control circuit, which is connected to the safety protection control circuit and the processor respectively; the sleep signal input terminal of the processor is connected to the enable detection terminal of the sleep control circuit, and the sleep signal output terminal of the processor is connected to the enable control terminal of the sleep control circuit; the controller receives the current enable state signal of the sleep control circuit through the sleep signal input terminal, generates an enable signal and sends it to the enable control terminal of the sleep control circuit through the sleep signal output terminal; and starts the high-speed external clock source gating process in the processor, and according to the set allocation process, wakes up the sleep of the charging overvoltage protection subcircuit, charging overcurrent protection subcircuit, charging high and low temperature protection subcircuit, discharge overvoltage protection subcircuit, discharge overcurrent protection subcircuit, short circuit protection subcircuit, discharge high and low temperature protection subcircuit, battery temperature detection subcircuit, passive balancing overcharging subcircuit and fault alarm subcircuit in the sleep control circuit, so as to realize that the safety protection control circuit remains in a working state that satisfies the power not exceeding the set power threshold.

[0068] The working principle of the above technical solution is as follows: in order to ensure that the working power of the safety protection control circuit meets the set power requirement, the present invention is provided with a sleep control circuit, which is respectively connected to the safety protection control circuit and the processor; the sleep signal input end of the processor is connected to the enable detection end of the sleep control circuit, and the sleep signal output end of the processor is connected to the enable control end of the sleep control circuit; the controller receives the current enable state signal of the sleep control circuit through the sleep signal input end, generates an enable signal and sends it to the enable control end of the sleep control circuit through the sleep signal output end; and starts the high-speed external clock source gating process in the processor, and according to the set allocation process, wakes up the sleep of the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balance overcharge subcircuit and the fault alarm subcircuit in the sleep control circuit, so as to realize that the safety protection control circuit remains in a working state that satisfies the power not exceeding the set power threshold.

[0069] The beneficial effect of the above technical solution is: by setting a sleep control circuit, it can be ensured that the working power of the safety protection control circuit meets the set power requirement.

[0070] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A lithium battery protection board with multiple safety protection mechanisms, characterized in that: include: A protection board body, a safety protection control circuit arranged on the protection board body, and a processor arranged on the protection board body, wherein the processor is connected to the safety protection control circuit; The processor controls the safety protection control circuit to achieve multiple safety protections for lithium batteries; It also includes a current detection component, a voltage detection component and a temperature detection component; the current detection component, the voltage detection component and the temperature detection component are configured on the protection board body; the current detection component, the voltage detection component and the temperature detection component are respectively connected to the processor; The current detection component is used to detect the charging current, discharging current and passive balancing charging current of the lithium battery, obtain the charging current data, discharging current data and passive balancing charging current data, and send the charging current data, discharging current data and passive balancing charging current data to the processor; The voltage detection component is used to detect the charging voltage and discharging voltage of the lithium battery, obtain the charging voltage data and the discharging voltage data, and send the charging voltage data and the discharging voltage data to the processor; A temperature detection component is used to detect the high and low charging temperatures, high and low discharging temperatures and battery temperature of the lithium battery, obtain the high and low charging temperature data, the high and low discharging temperature data and the battery temperature data, and send the high and low charging temperature data, the high and low discharging temperature data and the battery temperature data to the processor; The processor is based on the charging current data, the discharging current data, the passive balancing charging current data, the charging voltage data, the discharging voltage data, the charging high and low temperature data, the discharging high and low temperature data and the battery temperature data; Based on a plurality of classification comparators set in the processor, threshold comparison is performed according to a set threshold comparison program to obtain a comparison result; The setting of the threshold comparison program includes: setting a plurality of current thresholds, voltage thresholds and temperature thresholds; constructing a threshold database according to the current thresholds, voltage thresholds and temperature thresholds; generating a threshold comparison program according to the threshold data in the threshold database and the set threshold data comparison sequence; It also includes a battery string number detection and identification circuit, which is used to detect the number of battery strings in the startup operation to obtain the number of battery strings, and generate a second identification signal based on the number of battery strings; the processor adjusts the settings of the current threshold, voltage threshold and temperature threshold in the threshold database based on the second identification signal.

2. A lithium battery protection board with multiple safety protection mechanisms according to claim 1, characterized in that: The material of the protection board body is a flexible circuit full-soft board, a soft-rigid combination board or a glass fiber reinforced epoxy resin substrate board.

3. A lithium battery protection board with multiple safety protection mechanisms according to claim 1, characterized in that: The safety protection control circuit includes a charging overvoltage protection subcircuit, a charging overcurrent protection subcircuit, a charging high and low temperature protection subcircuit, a discharge overvoltage protection subcircuit, a discharge overcurrent protection subcircuit, a short circuit protection subcircuit, a discharge high and low temperature protection subcircuit, a battery temperature detection subcircuit, a passive balancing overcharging subcircuit, an ID identification startup subcircuit and a fault alarm subcircuit.

4. A lithium battery protection board with multiple safety protection mechanisms according to claim 1, characterized in that: It also includes a signal generating circuit, which is connected to the processor; the signal generating circuit is used to generate a number of control signals according to the comparison results, and generate a plurality of control commands according to the control signals; according to the control commands, the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit and the fault alarm subcircuit are controlled to operate.

5. A lithium battery protection board with multiple safety protection mechanisms according to claim 3, characterized in that: The ID identification power-on subcircuit is provided with an ID identification component, which is connected to the processor. The ID identification component is used to identify the user's identity information and generate a first identification signal based on the correct identity information obtained by identification. The processor generates a power-on control command based on the first identification signal and controls the power-on operation of the lithium battery corresponding to the protection board body according to the power-on control command.

6. A lithium battery protection board with multiple safety protection mechanisms according to claim 1, characterized in that: It also includes a test subcircuit and a test signal generating subcircuit, the test subcircuit is connected to the processor and the safety protection control circuit respectively; the test subcircuit is connected to the test signal generating subcircuit; The test subcircuit includes a plurality of test switches, which are respectively connected to a charging overvoltage protection subcircuit, a charging overcurrent protection subcircuit, a charging high and low temperature protection subcircuit, a discharging overvoltage protection subcircuit, a discharging overcurrent protection subcircuit, a short circuit protection subcircuit, a discharging high and low temperature protection subcircuit, a battery temperature detection subcircuit, a passive balancing overcharge subcircuit, an ID identification startup subcircuit, and a fault alarm subcircuit; The processor is configured with a plurality of test signal input terminals, which are correspondingly connected to a plurality of test signal output terminals of the test signal generating subcircuit; the processor is also configured with a plurality of test control signal output ports, which are correspondingly connected to the test switches; The test signal generating subcircuit is used to receive the test instructions input by the user and generate multiple test signals according to the test instructions; the processor controls the corresponding test switch to close according to the received test signal to realize the testing of multiple preset circuit working parameters of the charging overvoltage protection subcircuit, the charging overcurrent protection subcircuit, the charging high and low temperature protection subcircuit, the discharge overvoltage protection subcircuit, the discharge overcurrent protection subcircuit, the short circuit protection subcircuit, the discharge high and low temperature protection subcircuit, the battery temperature detection subcircuit, the passive balancing overcharging subcircuit, the ID identification startup subcircuit and the fault alarm subcircuit.

7. A lithium battery protection board with multiple safety protection mechanisms according to claim 1, characterized in that: It also includes a sleep control circuit, which is connected to the safety protection control circuit and the processor respectively; the sleep signal input terminal of the processor is connected to the enable detection terminal of the sleep control circuit, and the sleep signal output terminal of the processor is connected to the enable control terminal of the sleep control circuit; the controller receives the current enable state signal of the sleep control circuit through the sleep signal input terminal, generates an enable signal and sends it to the enable control terminal of the sleep control circuit through the sleep signal output terminal; and starts the high-speed external clock source gating process in the processor, and according to the set allocation process, wakes up the charging overvoltage protection subcircuit, charging overcurrent protection subcircuit, charging high and low temperature protection subcircuit, discharge overvoltage protection subcircuit, discharge overcurrent protection subcircuit, short circuit protection subcircuit, discharge high and low temperature protection subcircuit, battery temperature detection subcircuit, passive balancing overcharging subcircuit and fault alarm subcircuit in the sleep control circuit, so as to realize that the safety protection control circuit remains in a working state that satisfies the power not exceeding the set power threshold.

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