Non-charging diagnosis method for two-turn battery replacement intelligent cabinet

Abstract

The invention belongs to the technical field of BMS battery management systems, and particularly relates to a two-turn battery replacement intelligent cabinet non-charging diagnosis method, which comprises the following steps: S100, initializing a system, and enabling the system to enter a pre-discharging state; according to the non-charging diagnosis method for the two-turn battery switching intelligent cabinet, the charging state of the lithium battery is divided into the pre-discharging state, the charging state, the discharging state and the protection state by setting S100-S700, so that the state switching of the battery is accurately controlled, the problem of excessive discharging or insufficient charging is avoided, and the effect of prolonging the service life of the battery is achieved. Therefore, the problem that an existing intelligent lithium battery state judgment technology cannot be flexibly optimized and adapted according to an actual application scene is solved, and the problem that the state judgment is limited due to the fact that the state of the battery is automatically judged through discharge current or a front-end chip and special requirements of different application scenes cannot be fully considered is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of BMS battery management systems, and in particular to a non-charging diagnosis method for a two-wheel battery-exchange intelligent cabinet. Background Art

[0002] In the existing market, the state judgment technology of smart lithium batteries mainly focuses on judging the battery state by discharge current or front-end chip. However, these methods have the problem of not being able to flexibly optimize and adapt according to actual application scenarios. This means that in different usage environments, the judgment of the state of smart lithium batteries may have certain limitations and cannot fully meet actual needs.

[0003] Therefore, in response to this situation, a new technology has been developed that can more flexibly and intelligently judge the status of smart lithium batteries to adapt to different application scenarios and optimize them. This technology is expected to bring more efficient and reliable solutions for the monitoring and management of smart lithium batteries. Summary of the invention

[0004] Based on the existing technical problems, the present invention proposes a method for diagnosing non-charging of a two-wheel battery-swapping smart cabinet.

[0005] The present invention proposes a method for diagnosing a non-charging state of a two-wheel battery-swapping intelligent cabinet, comprising the following steps:

[0006] S100, initializing the system to put the system into a pre-play state;

[0007] S200, in the pre-discharge state, judging whether to enter the discharge state or the charge state according to the detection data;

[0008] S300: After entering the discharge state, determine whether to maintain the discharge state or switch back to the prevention state according to the detection data.

[0009] S400, in the discharge state, judging whether to switch to the charging state and the protection state according to the detection data;

[0010] S500, in the discharge state, after detecting that the protection bit enters the protection state, switching to the protection state, and switching to the discharge state again after the protection bit is released;

[0011] S600, in the charging state, judging whether to switch to the pre-discharge state or the protection state according to the detection data;

[0012] S700: In the charging state, when undervoltage protection or other protection conditions are detected, switch to the protection state. In the protection state, detect whether a protection release signal is detected. If a protection release signal is detected, switch to the charging state.

[0013] Preferably, in the pre-play state, the pre-play MOS is turned on when entering, and is turned off when exiting.

[0014] Preferably, the pre-play state switching condition includes:

[0015] a. Detect CAN communication and immediately switch to charging state;

[0016] b. The pre-discharge circuit detects current and there is no short-circuit flag on the front-end chip. After 200mS, it switches to the discharge state.

[0017] Preferably, in the charging state, the charging MOS is turned on when entering, and is turned off when exiting.

[0018] Preferably, the charging state switching condition includes:

[0019] c. After not receiving any CAN message for 3000mS, it switches to the pre-release state;

[0020] d. Detect the battery protection position and switch to the protection state immediately.

[0021] Preferably, in the discharge state, the discharge MOS is turned on when entering, and is turned off when exiting.

[0022] Preferably, the discharge state switching condition includes:

[0023] e. The discharge current is less than 20mA. After 30 minutes, it switches to the pre-discharge state. If the current is greater than 50mA during this period, the timing will be restarted;

[0024] f. When undervoltage protection occurs, switch to pre-discharge state immediately;

[0025] h. Detect the front-end protection position and immediately switch to the pre-release state;

[0026] i. After detecting that the charging current is greater than 1A for 128 seconds, it switches to the pre-discharge state;

[0027] j. After detecting that the charging current is greater than 30A and lasts for 7 seconds, it switches to the pre-discharge state;

[0028] k. After the vehicle leaving state is detected and lasts for 1.5 seconds, it switches to the prevention state;

[0029] l. Detect CAN communication and switch to charging state immediately;

[0030] m. When detecting front-end protection and undervoltage protection, switch to protection state immediately.

[0031] Preferably, in the protection state, all MOS are turned off when entering.

[0032] Preferably, the protection state switching condition includes:

[0033] n. The protection bit is released and the system switches back to the previous state immediately.

[0034] The beneficial effects of the present invention are:

[0035] By setting S100-S700, the lithium battery charging state is divided into four states: pre-discharge state, charging state, discharge state and protection state, so as to achieve precise control of battery state transition, avoid the problem of over-discharge or under-charge, and extend the battery life. At the same time, it simplifies the user's operation process, improves the user experience, and realizes the effective use of energy by optimizing the charge and discharge cycle, which improves the overall operation efficiency of the system, thus solving the problem that the existing intelligent lithium battery state judgment technology cannot be flexibly optimized and adapted according to the actual application scenario, and the problem that the battery state is judged by the discharge current or the front-end chip, and the special needs of different application scenarios cannot be fully considered, resulting in the limitation of state judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a non-charging diagnosis method for a two-wheel battery-swapping intelligent cabinet proposed by the present invention;

[0037] Figure 2 A schematic diagram of switching between the pre-discharge state and the discharge state of a two-wheel battery exchange intelligent cabinet non-charging diagnosis method proposed by the present invention;

[0038] Figure 3 A schematic diagram of the switching between the charging state and the protection state of a two-wheel battery-swap smart cabinet non-charging diagnosis method proposed in the present invention. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Reference Figure 1-Figure 3 , a two-wheel battery exchange intelligent cabinet non-charging diagnosis method, comprising the following steps:

[0041] S100, initializing the system to put the system into a pre-play state;

[0042] S200, in the pre-discharge state, judging whether to enter the discharge state or the charge state according to the detection data;

[0043] S300: After entering the discharge state, determine whether to maintain the discharge state or switch back to the prevention state according to the detection data.

[0044] S400, in the discharge state, judging whether to switch to the charging state and the protection state according to the detection data;

[0045] S500, in the discharge state, after detecting that the protection bit enters the protection state, switching to the protection state, and switching to the discharge state again after the protection bit is released;

[0046] S600, in the charging state, judging whether to switch to the pre-discharge state or the protection state according to the detection data;

[0047] S700: In the charging state, when undervoltage protection or other protection conditions are detected, switch to the protection state. In the protection state, detect whether a protection release signal is detected. If a protection release signal is detected, switch to the charging state.

[0048] Specifically, in the pre-play state, the pre-play MOS is turned on when entering, and the pre-play MOS is turned off when exiting.

[0049] The pre-release state switching conditions include:

[0050] a. Detect CAN communication and immediately switch to charging state;

[0051] b. The pre-discharge circuit detects current and there is no short-circuit flag on the front-end chip. After 200mS, it switches to the discharge state.

[0052] Specifically, in the charging state, the charging MOS is turned on when entering, and the charging MOS is turned off when exiting.

[0053] Charging state switching conditions include:

[0054] c. After not receiving any CAN message for 3000mS, it switches to the pre-release state;

[0055] d. Detect the battery protection position and switch to the protection state immediately.

[0056] Specifically, in the discharge state, the discharge MOS is turned on when entering, and the discharge MOS is turned off when exiting.

[0057] Discharge state switching conditions include:

[0058] e. The discharge current is less than 20mA. After 30 minutes, it switches to the pre-discharge state. If the current is greater than 50mA during this period, the timing will be restarted;

[0059] f. When undervoltage protection occurs, switch to pre-discharge state immediately;

[0060] h. Detect the front-end protection position and immediately switch to the pre-release state;

[0061] i. After detecting that the charging current is greater than 1A for 128 seconds, it switches to the pre-discharge state;

[0062] j. After detecting that the charging current is greater than 30A and lasts for 7 seconds, it switches to the pre-discharge state;

[0063] k. After the vehicle leaving state is detected and lasts for 1.5 seconds, it switches to the prevention state;

[0064] l. Detect CAN communication and switch to charging state immediately;

[0065] m. When detecting front-end protection and undervoltage protection, switch to protection state immediately.

[0066] Specifically, in the protection state, all MOS are turned off when entering.

[0067] The protection status switching conditions include:

[0068] n. The protection bit is released and the system switches back to the previous state immediately.

[0069] By setting S100-S700, the lithium battery charging state is divided into four states: pre-discharge state, charging state, discharge state and protection state, so as to achieve precise control of battery state transition, avoid the problem of over-discharge or under-charge, and extend the battery life. At the same time, it simplifies the user's operation process, improves the user experience, and realizes the effective use of energy by optimizing the charge and discharge cycle, which improves the overall operation efficiency of the system, thus solving the problem that the existing intelligent lithium battery state judgment technology cannot be flexibly optimized and adapted according to the actual application scenario, and the problem that the battery state is judged by the discharge current or the front-end chip, and the special needs of different application scenarios cannot be fully considered, resulting in the limitation of state judgment.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for diagnosing a non-charging state of a two-wheel battery-swapping smart cabinet, characterized in that: The following steps are involved: S100, initializing the system to put the system into a pre-play state; S200, in the pre-discharge state, judging whether to enter the discharge state or the charge state according to the detection data; S300, after entering the discharge state, judging whether to maintain the discharge state or switch back to the prevention state according to the detection data; S400, in the discharge state, judging whether to switch to the charging state and the protection state according to the detection data; S500, in the discharge state, after detecting that the protection bit enters the protection state, switching to the protection state, and switching to the discharge state again after the protection bit is released; S600, in the charging state, judging whether to switch to the pre-discharge state or the protection state according to the detection data; S700: In the charging state, when undervoltage protection or other protection conditions are detected, switch to the protection state. In the protection state, detect whether a protection release signal is detected. If a protection release signal is detected, switch to the charging state.

2. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 1, characterized in that: In the pre-play state, the pre-play MOS is turned on when entering, and the pre-play MOS is turned off when exiting.

3. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 2, characterized in that: The pre-play state switching condition includes: a. Detect CAN communication and immediately switch to charging state; b. The pre-discharge circuit detects current and there is no short-circuit flag on the front-end chip. After 200mS, it switches to the discharge state.

4. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 1, characterized in that: In the charging state, the charging MOS is turned on when entering, and the charging MOS is turned off when exiting.

5. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 4, characterized in that: The charging state switching condition includes: c. After not receiving any CAN message for 3000mS, it switches to the pre-release state; d. Detect the battery protection position and switch to the protection state immediately.

6. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 1, characterized in that: In the discharge state, the discharge MOS is turned on when entering, and the discharge MOS is turned off when exiting.

7. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 6, characterized in that: The discharge state switching condition includes: e. The discharge current is less than 20mA. After 30 minutes, it switches to the pre-discharge state. If the current is greater than 50mA during this period, the timing will be restarted; f. When undervoltage protection occurs, switch to pre-discharge state immediately; h. Detect the front-end protection position and immediately switch to the pre-release state; i. After detecting that the charging current is greater than 1A for 128 seconds, it switches to the pre-discharge state; j. After detecting that the charging current is greater than 30A and lasts for 7 seconds, it switches to the pre-discharge state; k. After the vehicle leaving state is detected and lasts for 1.5 seconds, it switches to the prevention state; l. Detect CAN communication and switch to charging state immediately; m. When detecting front-end protection and undervoltage protection, switch to protection state immediately.

8. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 1, characterized in that: In the protection state, all MOS are turned off when entering.

9. A two-wheel battery exchange intelligent cabinet non-charging diagnosis method according to claim 8, characterized in that: The protection state switching condition includes: n. The protection bit is released and the system switches back to the previous state immediately.

Images