High-reliability lithium battery protection plate system applied to electric automobile

Abstract

The invention belongs to the technical field of lithium battery protection boards, and provides a high-reliability lithium battery protection board system applied to an electric vehicle, which comprises a protection board, and a lithium battery pack, a protection assembly, a relay assembly, a monitoring assembly and a controller arranged on the protection board, the protection assembly is connected with the relay assembly. The relay assembly and the monitoring assembly are respectively connected with the controller; and the controller is used for controlling the relay assembly according to the circuit parameter data and temperature data of the lithium battery pack acquired by the monitoring assembly, and realizing the function opening and closing of the protection assembly through the relay assembly. Through the protection plate and the lithium battery pack, the protection assembly, the relay assembly, the monitoring assembly and the controller which are arranged on the protection plate, reliable protection can be correspondingly implemented on the lithium battery pack for the electric vehicle, and function exertion and long-term use of the lithium battery pack are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery protection boards, and in particular to a high-reliability lithium battery protection board system applied to electric vehicles. Background Art

[0002] In recent years, with the popularity of electric vehicles, lithium batteries in electric vehicles are equipped with protection boards to protect lithium batteries. At present, there is still a lack of reliable, effective and systematic technical means for the protection and monitoring management of protection boards and lithium batteries, resulting in less than ideal protection effects for lithium batteries and protection boards.

[0003] Therefore, it is necessary to provide a high-reliability lithium battery protection board system for electric vehicles. Summary of the invention

[0004] The present invention provides a high-reliability lithium battery protection board system for electric vehicles. Through the protection board and the lithium battery pack, protection component, relay component, monitoring component and controller arranged on the protection board, reliable protection of the lithium battery pack used in the electric vehicle can be achieved, which is beneficial to the function and long-term use of the lithium battery pack.

[0005] The present invention provides a high-reliability lithium battery protection board system for electric vehicles, comprising: A protection board and a lithium battery pack, a protection component, a relay component, a monitoring component and a controller arranged on the protection board; the protection component is connected to the relay component; the relay component and the monitoring component are respectively connected to the controller; the controller is used to control the relay component according to the circuit parameter data and temperature data of the lithium battery pack obtained by the monitoring component, and to turn the function of the protection component on and off through the relay component.

[0006] Furthermore, the protection board is a double-layer board or a four-layer board.

[0007] Furthermore, the number of lithium battery packs in series is 16 to 24.

[0008] Furthermore, the protection component includes a circuit protection subcomponent and a temperature protection subcomponent.

[0009] Furthermore, the circuit protection subcomponent includes a charging overvoltage protection molecular component, a charging overcurrent protection molecular component, a discharging overvoltage protection molecular component, a discharging overcurrent protection molecular component, a short circuit protection molecular component and a fault alarm molecular component.

[0010] Furthermore, the temperature protection subassembly includes a charging high and low temperature protection molecular assembly and a discharging high and low temperature protection molecular assembly.

[0011] Furthermore, the relay assembly includes a relay and a relay switch; the relay switch is used to realize opening and closing of the relay under the control of the controller.

[0012] Furthermore, the monitoring component includes a sensor sub-component and a communication sub-component; the sensor sub-component is connected to the communication sub-component; the sensor sub-component includes a temperature sensor and a current signal sensor; the temperature sensor is used to monitor and obtain the temperature of the lithium battery pack, and the current signal sensor is used to monitor and obtain the circuit current data of the lithium battery pack, and transmit the lithium battery pack temperature and the circuit current data of the lithium battery pack to the controller through the communication sub-component.

[0013] Furthermore, a heating film and a heat dissipation device are also provided on the protection board; if the temperature of the lithium battery pack is greater than the set temperature threshold, the controller controls the heat dissipation device to dissipate heat; if the temperature of the lithium battery pack is lower than the set temperature threshold, the controller controls the heating film to heat the protection board; if the circuit current data of the lithium battery pack is greater than the set first current threshold, or the circuit current data of the lithium battery pack is lower than the set second current threshold, the controller controls the fault alarm molecular component to issue a fault alarm.

[0014] Furthermore, a pressure sensor and a displacement sensor are also configured on the protection board; the pressure sensor is used to monitor and obtain first pressure data of the protection board in a charging state or a discharging state of the lithium battery pack, and second pressure data of the protection board in a non-charging state or a non-discharging state of the lithium battery pack, and send the first pressure data and the second pressure data to the controller; the displacement sensor is used to monitor and obtain first displacement data of the electric vehicle in a driving state, and monitor and obtain second displacement data of the electric vehicle after a long period of parking after the driving state, and send the first displacement data and the second displacement data to the controller; The controller controls the configured comparator to compare the first pressure data and the second pressure data with the set reference pressure data respectively to obtain two comparison results; if the difference between the two comparison results is greater than the set first threshold value, a first abnormality determination condition is generated; The controller controls the configured comparator to compare the first displacement data with the second displacement data to obtain a comparison result; if the comparison result is greater than a set second threshold value, a second abnormality determination condition is generated; If the first abnormal judgment condition and the second abnormal judgment condition occur at the same time, a warning signal to be observed is generated to indicate that an abnormality has occurred on the protection board. If the number of occurrences of the warning signal to be observed is greater than the set number threshold, a warning signal to indicate that an abnormality has occurred on the protection board is generated. Based on the warning signal, the fault alarm molecular component is controlled to issue an abnormal warning of the abnormality on the protection board.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: through the protection board and the lithium battery pack, protection component, relay component, monitoring component and controller arranged on the protection board, reliable protection of the lithium battery pack used in electric vehicles can be achieved, which is beneficial to the function and long-term use of the lithium battery pack.

[0016] 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.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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: Figure 1 This is a schematic diagram of the structure of a high-reliability lithium battery protection board system used in electric vehicles; Figure 2 is a schematic diagram of the circuit protection subassembly structure; Figure 3 Schematic diagram of the temperature protection subassembly structure. DETAILED DESCRIPTION

[0019] 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.

[0020] The present invention provides a high reliability lithium battery protection board system for electric vehicles, such as Figure 1 As shown, it includes: a protection board and a lithium battery pack arranged on the protection board, a protection component, a relay component, a monitoring component and a controller; the protection component is connected to the relay component; the relay component and the monitoring component are respectively connected to the controller; the controller is used to control the relay component according to the circuit parameter data and temperature data of the lithium battery pack obtained by the monitoring component, and realize the function of turning on and off the protection component through the relay component.

[0021] The working principle of the above technical solution is: in order to realize a high-reliability lithium battery protection board system applied to electric vehicles, the present invention proposes a protection board and a lithium battery pack, a protection component, a relay component, a monitoring component and a controller arranged on the protection board; the protection component is connected to the relay component; the relay component and the monitoring component are respectively connected to the controller; the controller is used to control the relay component according to the circuit parameter data and temperature data of the lithium battery pack obtained by the monitoring component, and realize the function of the protection component being turned on and off through the relay component.

[0022] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, through the protection board and the lithium battery pack, protection component, relay component, monitoring component and controller arranged on the protection board, reliable protection of the lithium battery pack used in electric vehicles can be achieved, which is beneficial to the function and long-term use of the lithium battery pack.

[0023] In one embodiment, the protection board is a double-layer board or a four-layer board.

[0024] The working principle of the above technical solution is: the protection board is a double-layer board or a four-layer board, which can adapt to the specifications of different lithium battery packs.

[0025] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the protection plate is a double-layer plate or a four-layer plate, and different specifications of protection can be implemented on the lithium battery pack.

[0026] In one embodiment, the number of lithium battery packs in series is 16 to 24.

[0027] The working principle of the above technical solution is: setting the number of lithium battery packs in series to 16 to 24 can meet the application conditions of electric vehicles.

[0028] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the number of strings of lithium battery packs is set to 16 to 24, which can meet the application conditions of electric vehicles.

[0029] In one embodiment, the protection assembly includes a circuit protection subassembly and a temperature protection subassembly.

[0030] The working principle of the above technical solution is: the protection component includes a circuit protection sub-component and a temperature protection sub-component.

[0031] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, a circuit protection subassembly and a temperature protection subassembly are provided to meet basic protection requirements.

[0032] In one embodiment, Figure 2As shown, the circuit protection subcomponent includes a charging overvoltage protection molecular component, a charging overcurrent protection molecular component, a discharging overvoltage protection molecular component, a discharging overcurrent protection molecular component, a short circuit protection molecular component and a fault alarm molecular component.

[0033] The working principle of the above technical scheme is: in order to realize the function of the circuit protection sub-component, the present invention proposes a charging overvoltage protection molecular component, a charging overcurrent protection molecular component, a discharge overvoltage protection molecular component, a discharge overcurrent protection molecular component, a short circuit protection molecular component and a fault alarm molecular component.

[0034] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the protection of the lithium battery pack in the circuit board can be achieved through the configuration of multiple protection molecular components.

[0035] In one embodiment, Figure 3 As shown, the temperature protection subassembly includes a charging high and low temperature protection molecular assembly and a discharging high and low temperature protection molecular assembly.

[0036] The working principle of the above technical solution is: the temperature protection sub-component includes a charging high and low temperature protection molecular component and a discharging high and low temperature protection molecular component.

[0037] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by proposing a temperature protection subassembly, temperature protection of the lithium battery pack in the circuit board can be achieved.

[0038] In one embodiment, the relay assembly includes a relay and a relay switch; the relay switch is used to realize opening and closing of the relay under the control of the controller.

[0039] The working principle of the above technical solution is: the present invention proposes a relay assembly, including a relay and a relay switch; the relay switch is used to realize the opening and closing of the relay under the control of the controller, so as to realize independent control of multiple circuit protection sub-assemblies and temperature protection sub-assemblies, so as to ensure the flexible implementation of the functions of the circuit protection sub-assemblies and the temperature protection sub-assemblies.

[0040] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, independent control of multiple circuit protection sub-components and temperature protection sub-components can be achieved through relay components.

[0041] In one embodiment, the monitoring component includes a sensor sub-component and a communication sub-component; the sensor sub-component is connected to the communication sub-component; the sensor sub-component includes a temperature sensor and a current signal sensor; the temperature sensor is used to monitor and obtain the temperature of the lithium battery pack, and the current signal sensor is used to monitor and obtain the circuit current data of the lithium battery pack, and transmit the lithium battery pack temperature and the circuit current data of the lithium battery pack to the controller through the communication sub-component.

[0042] The working principle of the above technical solution is: in order to realize the configuration of the monitoring component, the present invention proposes a sensor sub-component and a communication sub-component; the sensor sub-component is connected to the communication sub-component; the sensor sub-component includes a temperature sensor and a current signal sensor; the temperature sensor is used to monitor and obtain the temperature of the lithium battery pack, and the current signal sensor is used to monitor and obtain the circuit current data of the lithium battery pack, and the lithium battery pack temperature and the circuit current data of the lithium battery pack are transmitted to the controller through the communication sub-component.

[0043] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by configuring the monitoring component, effective monitoring of the lithium battery pack can be ensured.

[0044] In one embodiment, a heating film and a heat dissipation device are also provided on the protection board; if the temperature of the lithium battery pack is greater than the set temperature threshold, the controller controls the heat dissipation device to dissipate heat; if the temperature of the lithium battery pack is lower than the set temperature threshold, the controller controls the heating film to heat the protection board; if the circuit current data of the lithium battery pack is greater than the set first current threshold, or the circuit current data of the lithium battery pack is lower than the set second current threshold, the controller controls the fault alarm molecular component to issue a fault alarm.

[0045] The working principle of the above technical solution is: in order to achieve temperature protection of the protective plate, the present invention arranges a heating film and a heat dissipation device on the protective plate; if the temperature of the lithium battery pack is greater than the set temperature threshold, the controller controls the heat dissipation device to dissipate heat; if the temperature of the lithium battery pack is lower than the set temperature threshold, the controller controls the heating film to heat the protective plate; if the circuit current data of the lithium battery pack is greater than the set first current threshold, or the circuit current data of the lithium battery pack is lower than the set second current threshold, the controller controls the fault alarm molecular component to issue a fault alarm.

[0046] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by arranging a heating film and a heat dissipation device on the circuit board, heating protection for the circuit board can be ensured.

[0047] In one embodiment, a pressure sensor and a displacement sensor are further configured on the protection board; the pressure sensor is used to monitor and obtain first pressure data of the protection board in a charging state or a discharging state of the lithium battery pack, and second pressure data of the protection board in a non-charging state or a non-discharging state of the lithium battery pack, and send the first pressure data and the second pressure data to the controller; the displacement sensor is used to monitor and obtain first displacement data of the electric vehicle in a driving state, and monitor and obtain second displacement data of the electric vehicle after a long period of parking after the driving state, and send the first displacement data and the second displacement data to the controller; The controller controls the configured comparator to compare the first pressure data and the second pressure data with the set reference pressure data respectively to obtain two comparison results; if the difference between the two comparison results is greater than the set first threshold value, a first abnormality determination condition is generated; The controller controls the configured comparator to compare the first displacement data with the second displacement data to obtain a comparison result; if the comparison result is greater than a set second threshold value, a second abnormality determination condition is generated; If the first abnormal judgment condition and the second abnormal judgment condition occur at the same time, a warning signal to be observed is generated to indicate that an abnormality has occurred on the protection board. If the number of occurrences of the warning signal to be observed is greater than the set number threshold, a warning signal to indicate that an abnormality has occurred on the protection board is generated. Based on the warning signal, the fault alarm molecular component is controlled to issue an abnormal warning of the abnormality on the protection board.

[0048] The working principle of the above technical solution is as follows: in order to realize the monitoring of the specific position and protection function of the protection plate, the present invention configures a pressure sensor and a displacement sensor on the protection plate; the pressure sensor is used to monitor and obtain the first pressure data of the protection plate in the charging state or the discharging state of the lithium battery pack, and the second pressure data of the protection plate in the non-charging state or the non-discharging state of the lithium battery pack, and send the first pressure data and the second pressure data to the controller; the displacement sensor is used to monitor and obtain the first displacement data of the electric vehicle in the driving state, and monitor and obtain the second displacement data of the electric vehicle after a long period of parking after the driving state, and send the first displacement data and the second displacement data to the controller; The controller controls the configured comparator to compare the first pressure data and the second pressure data with the set reference pressure data respectively to obtain two comparison results; if the difference between the two comparison results is greater than the set first threshold value, a first abnormality determination condition is generated; The controller controls the configured comparator to compare the first displacement data with the second displacement data to obtain a comparison result; if the comparison result is greater than a set second threshold value, a second abnormality determination condition is generated; If the first abnormal judgment condition and the second abnormal judgment condition occur at the same time, a warning signal to be observed is generated to indicate that an abnormality has occurred on the protection board. If the number of occurrences of the warning signal to be observed is greater than the set number threshold, a warning signal to indicate that an abnormality has occurred on the protection board is generated. Based on the warning signal, the fault alarm molecular component is controlled to issue an abnormal warning of the abnormality on the protection board.

[0049] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by configuring a pressure sensor and a displacement sensor on the protection plate, the position and function of the protection plate can be monitored, and abnormalities in the protection function of the protection plate can be discovered in time.

[0050] 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 high reliability lithium battery protection board system for electric vehicles, characterized in that: include: A protection board and a lithium battery pack, a protection component, a relay component, a monitoring component and a controller arranged on the protection board; The protection component is connected to the relay component; The relay component and the monitoring component are connected to the controller respectively; the controller is used to control the relay component according to the circuit parameter data and temperature data of the lithium battery pack obtained by the monitoring component, and to turn the function of the protection component on and off through the relay component.

2. A high reliability lithium battery protection board system for electric vehicles according to claim 1, characterized in that: The protection board is a double-layer board or a four-layer board.

3. The high reliability lithium battery protection board system for electric vehicles according to claim 1, characterized in that: The number of lithium battery strings is 16 to 24.

4. A high reliability lithium battery protection board system for electric vehicles according to claim 1, characterized in that: The protection component includes a circuit protection sub-component and a temperature protection sub-component.

5. A high reliability lithium battery protection board system for electric vehicles according to claim 4, characterized in that: The circuit protection sub-components include a charging overvoltage protection molecular component, a charging overcurrent protection molecular component, a discharging overvoltage protection molecular component, a discharging overcurrent protection molecular component, a short circuit protection molecular component and a fault alarm molecular component.

6. A high reliability lithium battery protection board system for electric vehicles according to claim 4, characterized in that: The temperature protection subassembly includes a charging high and low temperature protection molecular assembly and a discharging high and low temperature protection molecular assembly.

7. A high reliability lithium battery protection board system for electric vehicles according to claim 1, characterized in that: The relay assembly includes a relay and a relay switch; the relay switch is used to realize the opening and closing of the relay under the control of the controller.

8. The high reliability lithium battery protection board system for electric vehicles according to claim 1, characterized in that: The monitoring component includes a sensor sub-component and a communication sub-component; the sensor sub-component is connected to the communication sub-component; the sensor sub-component includes a temperature sensor and a current signal sensor; the temperature sensor is used to monitor and obtain the temperature of the lithium battery pack, and the current signal sensor is used to monitor and obtain the circuit current data of the lithium battery pack, and transmit the lithium battery pack temperature and the circuit current data of the lithium battery pack to the controller through the communication sub-component.

9. A high reliability lithium battery protection board system for electric vehicles according to claim 8, characterized in that: A heating film and a heat dissipation device are also provided on the protection board; if the temperature of the lithium battery pack is greater than the set temperature threshold, the controller controls the heat dissipation device to dissipate heat; if the temperature of the lithium battery pack is lower than the set temperature threshold, the controller controls the heating film to heat the protection board; if the circuit current data of the lithium battery pack is greater than the set first current threshold, or the circuit current data of the lithium battery pack is lower than the set second current threshold, the controller controls the fault alarm molecular component to issue a fault alarm.

10. A high reliability lithium battery protection board system for electric vehicles according to claim 8, characterized in that: The protection board is also equipped with a pressure sensor and a displacement sensor; the pressure sensor is used to monitor and obtain the first pressure data of the protection board in the charging state or the discharging state of the lithium battery pack, and the second pressure data of the protection board in the non-charging state or the non-discharging state of the lithium battery pack, and send the first pressure data and the second pressure data to the controller; the displacement sensor is used to monitor and obtain the first displacement data of the electric vehicle in the driving state, and monitor and obtain the second displacement data of the electric vehicle after a long period of parking after the driving state, and send the first displacement data and the second displacement data to the controller; The controller controls the configured comparator to compare the first pressure data and the second pressure data with the set reference pressure data respectively to obtain two comparison results; if the difference between the two comparison results is greater than the set first threshold value, a first abnormality determination condition is generated; The controller controls the configured comparator to compare the first displacement data with the second displacement data to obtain a comparison result; If the comparison result is greater than the set second threshold, a second abnormality determination condition is generated; If the first abnormal judgment condition and the second abnormal judgment condition occur at the same time, a warning signal to be observed is generated to indicate that an abnormality has occurred on the protection board. If the number of occurrences of the warning signal to be observed is greater than the set number threshold, a warning signal to indicate that an abnormality has occurred on the protection board is generated. Based on the warning signal, the fault alarm molecular component is controlled to issue an abnormal warning of the abnormality on the protection board.

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