CN118322938A - Power recognition scheme for power generator of lithium battery system of truck - Google Patents

Abstract

The invention discloses a power recognition scheme aiming at a power generator of a truck lithium battery system, which comprises the following steps: the battery is charged by an external charger, the battery reaches the full level or reaches the full level quickly, and the second step is that: when the internal voltage of the battery reaches 27.5V, the charging current is detected to be greater than 80A for 5min, and the power of the generator is considered to be very high, and the accumulated number of times of the very high power is increased by one. The invention has strong applicability, the full charge voltage threshold value and the small current voltage threshold value are intelligently regulated by detecting the voltage and the power of the generator through the inside of the battery, manual adjustment of a user is not needed, the maintenance cost is low, the service life of the battery is prolonged, the maintenance cost of the battery is reduced through a reasonable battery charge management and BMS protection strategy, the safety is high, the occurrence of the overcharge of the battery can be effectively avoided through the reasonable battery charge management and BMS protection strategy, the safety of the battery is improved, and the safety factor of a truck driver in driving is improved.

Description

A solution for identifying generator power in truck lithium battery systems

Technical Field

The present invention relates to the technical field of truck lithium batteries, and in particular to a power identification solution for a truck lithium battery system generator.

Background technique

With the rapid development of automobiles, truck lithium battery systems are increasingly used in the field of transportation. However, the traditional truck lithium battery system generator power identification method has low accuracy and lacks effective measures to solve the problem that the battery cannot be fully charged or enters a load dumping state when the generator power is too high or too low, and the battery is fully charged into a small current. It cannot meet the requirements of modern transportation in terms of safety, environmental protection, and efficiency.

Some truck lithium batteries on the market use multi-level power distribution technology. This technology can intelligently distribute the output power of the battery to better meet the driver's demand for vehicle power and performance. At the same time, multi-level power distribution technology can also improve the service life and safety of the battery and reduce the maintenance cost of the vehicle.

This technology has relatively high limitations because the power regulation of the generator is limited. When the generator power is too large, it will enter a small current. At this time, the current is relatively large, above 50A, which will cause the battery to enter a load dump state; when the generator power is too small, when the internal voltage of the battery reaches 28V, the current is only a few A, or even no output current. At this time, it cannot enter a small current, which ultimately leads to the phenomenon of incomplete charging. Therefore, it cannot meet the rigid charging requirements of different working conditions or scenarios. If this technology needs to play its due role, more precise adjustment and control are required. However, due to the different environments of different truck drivers, and this adjustment requires manual adjustment, this increases the workload and psychological burden of drivers and company administrators. At present, truck lithium batteries have certain defects and limitations in handling generators of different powers. In order to better meet the charging needs under different working conditions and environments, this patent has developed a set of system methods for handling different generator powers with small limitations and strong applicability.

Summary of the invention

The purpose of the present invention is to provide a solution for identifying the power of a generator of a truck lithium battery system, which solves the problems raised in the background technology.

To achieve the above purpose, the present invention provides the following technical solutions: a generator power identification solution for a truck lithium battery system, including high generator power and low generator power, wherein the generator power is high and includes the following method steps:

Step 1: Connect the battery to an external charger and charge it until the battery reaches full charge or is almost fully charged.

Step 2: When the internal voltage of the battery reaches 27.5V, it is detected that the charging current is greater than 80A and lasts for 5 minutes. It is considered that the generator power is very large, and the cumulative number of times the power is very large is increased by one;

Step 3: When this phenomenon is exited (i.e., the total voltage is less than 27V and the discharge current is greater than 5A for 5 minutes) and the generator power is very high next time, the cumulative number of times the generator power is very high is increased by one;

Step 4: When the number of times the generator power is very high reaches 5, raise the thresholds of the full charge cut-off voltage (default 3.65V) and the low current voltage (default 3550mv) by 50mv;

Step 5: After raising the threshold, the BMS system will maintain this threshold for one week and retest after one week.

As a preferred embodiment of the present invention, when the generator power is low, the following steps are included:

Step 1: Connect the battery to an external charger and charge it until the battery reaches full charge or is almost fully charged.

Step 2: When the internal voltage of the battery reaches 27.5V, a charging current of less than 2A or a discharging current is detected for 5 minutes. At this time, the generator power is considered to be very low, and the cumulative number of times the power is very low is increased by one;

Step 3: When this phenomenon is exited (i.e. the total voltage is less than 27V and the discharge current is greater than 5A for 5 minutes) and the generator power is very low next time, the cumulative number of times the generator power is very low is increased by one;

Step 4: When the number of times the generator power is very low reaches 5, reduce the thresholds of the full charge cut-off voltage (default 3.65V) and the low current voltage (default 3550mv) by 50mv;

Step 5: After lowering the threshold, the BMS system will maintain this threshold for one week, and then re-test after one week.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention has strong applicability, and can intelligently adjust the full charge voltage threshold and the low current voltage threshold by detecting the generator voltage and power inside the battery itself, without the need for manual adjustment by the user;

Low maintenance cost: through reasonable battery charging management and BMS protection strategy, the battery life is extended and the battery maintenance cost is reduced;

High safety. Through reasonable battery charging management and BMS protection strategy, the occurrence of battery overcharging can be effectively avoided, the safety of the battery can be improved, and the safety factor of the truck driver can be improved during driving.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG1 is a flow chart of a power identification solution for a truck lithium battery system generator according to the present invention.

Detailed ways

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

Example

A generator power identification scheme for a truck lithium battery system includes a high generator power and a low generator power. When the generator power is high, the method steps are as follows:

Step 1: Connect the battery to an external charger and charge it until the battery reaches full charge or is almost fully charged.

Step 2: When the internal voltage of the battery reaches 27.5V, it is detected that the charging current is greater than 80A and lasts for 5 minutes. It is considered that the generator power is very large, and the cumulative number of times the power is very large is increased by one;

Step 3: When this phenomenon is exited (i.e., the total voltage is less than 27V and the discharge current is greater than 5A for 5 minutes) and the generator power is very high next time, the cumulative number of times the generator power is very high is increased by one;

Step 4: When the number of times the generator power is very high reaches 5, raise the thresholds of the full charge cut-off voltage (default 3.65V) and the low current voltage (default 3550mv) by 50mv;

Step 5: After raising the threshold, the BMS system will maintain this threshold for one week and retest after one week.

In addition, when the generator power is low, the following steps are included:

Step 1: Connect the battery to an external charger and charge it until the battery reaches full charge or is almost fully charged.

Step 2: When the internal voltage of the battery reaches 27.5V, a charging current of less than 2A or a discharging current is detected for 5 minutes. At this time, the generator power is considered to be very low, and the cumulative number of times the power is very low is increased by one;

Step 3: When this phenomenon is exited (i.e. the total voltage is less than 27V and the discharge current is greater than 5A for 5 minutes) and the generator power is very low next time, the cumulative number of times the generator power is very low is increased by one;

Step 4: When the number of times the generator power is very low reaches 5, reduce the thresholds of the full charge cut-off voltage (default 3.65V) and the low current voltage (default 3550mv) by 50mv;

Step 5: After lowering the threshold, the BMS system will maintain this threshold for one week, and then re-test after one week.

In summary, the present invention has strong applicability, and can intelligently adjust the full charge voltage threshold and the low current voltage threshold by detecting the generator voltage and power inside the battery itself, without the need for manual adjustment by the user;

Low maintenance cost: through reasonable battery charging management and BMS protection strategy, the battery life is extended and the battery maintenance cost is reduced;

High safety. Through reasonable battery charging management and BMS protection strategy, the occurrence of battery overcharging can be effectively avoided, the safety of the battery can be improved, and the safety factor of the truck driver can be improved during driving.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims (2)

1. A generator power identification scheme for a truck lithium battery system, characterized in that: it includes high generator power and low generator power, and when the generator power is high, it includes the following method steps: Step 1: Connect the battery to an external charger and charge it until the battery reaches full charge or is almost fully charged. Step 2: When the internal voltage of the battery reaches 27.5V, it is detected that the charging current is greater than 80A and lasts for 5 minutes. It is considered that the generator power is very large, and the cumulative number of times the power is very large is increased by one; Step 3: When this phenomenon is exited (i.e., the total voltage is less than 27V and the discharge current is greater than 5A for 5 minutes) and the generator power is very high next time, the cumulative number of times the generator power is very high is increased by one; Step 4: When the number of times the generator power is very high reaches 5, raise the thresholds of the full charge cut-off voltage (default 3.65V) and the low current voltage (default 3550mv) by 50mv; Step 5: After raising the threshold, the BMS system will maintain this threshold for one week and retest after one week. 2. A generator power identification scheme for a truck lithium battery system according to claim 1, characterized in that: when the generator power is low, the following steps are included: Step 1: Connect the battery to an external charger and charge it until the battery reaches full charge or is almost fully charged. Step 2: When the internal voltage of the battery reaches 27.5V, a charging current of less than 2A or a discharging current is detected for 5 minutes. At this time, the generator power is considered to be very low, and the cumulative number of times the power is very low is increased by one; Step 3: When this phenomenon is exited (i.e. the total voltage is less than 27V and the discharge current is greater than 5A for 5 minutes) and the generator power is very low next time, the cumulative number of times the generator power is very low is increased by one; Step 4: When the number of times the generator power is very low reaches 5, reduce the thresholds of the full charge cut-off voltage (default 3.65V) and the low current voltage (default 3550mv) by 50mv; Step 5: After lowering the threshold, the BMS system will maintain this threshold for one week, and then re-test after one week.