A distributed lithium battery networking system for industrial vehicles

Abstract

This invention provides a distributed lithium battery networking system for industrial vehicles. The main control unit is equipped with positive and negative line interfaces. The lithium battery pack includes multiple parallel-connected individual lithium batteries, each of which is electrically connected to a start / stop control relay. The lithium battery pack is electrically connected to the main control unit via sampling lines. The negative terminals of the multiple individual lithium batteries are connected in parallel and electrically connected to the vehicle. A power control contactor group is electrically connected between the lithium battery pack and the positive terminal of the vehicle. The COM terminal of the power control contactor group is electrically connected to the main control unit. When a lithium battery malfunctions or has low charge, the main control unit receives CAN message information from the lithium battery pack to control the start / stop relay and contactor to disconnect, remove the faulty or low-charge individual lithium battery, and connect a new standard modular individual lithium battery. This allows for quick resolution of battery pack issues by replacing modular individual lithium batteries without affecting the normal operation of the industrial vehicle.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a distributed lithium battery networking system for industrial vehicles. Background Technology

[0002] Currently, lithium battery packs used in industrial vehicles face numerous problems in practical applications. In particular, battery failures or low charge levels in individual battery packs can render the entire vehicle unusable. Due to the holistic nature of the battery system, the entire battery pack often requires repair or replacement, increasing maintenance costs and severely impacting vehicle efficiency. Existing lithium batteries also suffer from poor versatility, limiting their application in diverse industrial scenarios. Furthermore, complex battery maintenance and poor ease of maintenance increase labor and time costs. Moreover, the vehicle cannot operate normally while the battery is charging, resulting in prolonged idle time and significantly reducing the continuity of industrial operations and production efficiency. Utility Model Content

[0003] To address the above problems, this utility model provides a distributed lithium battery networking system for industrial vehicles. When a lithium battery malfunctions or has low power, the problem can be solved by quickly replacing a standardized individual lithium battery. Only the individual lithium batteries need to be repaired, without the need to repair or replace the entire battery system, thus not affecting the normal use of the industrial vehicle.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A distributed lithium battery networking system for industrial vehicles, characterized in that it comprises: a main control unit, a power control contactor group, a start-stop control relay, a lithium battery pack, a start-stop control relay coil contact group, a contactor coil contact group, a CAN communication module, and sampling lines. The main control unit is provided with positive and negative line interfaces. The lithium battery pack comprises multiple parallel-connected individual lithium batteries, each of which is electrically connected to a start-stop control relay. The positive and negative terminals of the lithium battery pack are electrically connected to the positive and negative line interfaces on the main control unit via sampling lines, respectively. The negative terminals of multiple individual lithium batteries are connected in parallel and electrically connected to the negative terminal of the vehicle. The positive terminal of the lithium battery pack is electrically connected to the positive terminal of the vehicle via the power control contactor group. The COM terminal of the power control contactor group is electrically connected to the positive line interface on the main control unit.

[0005] As an improvement, the power control contactor group includes multiple contactors KM, the NC terminals of the multiple contactors KM are connected in parallel and then electrically connected to the positive terminal of the vehicle; the COM terminal of each contactor KM is electrically connected to the positive terminal of the corresponding single lithium battery and the corresponding positive line interface on the main control unit.

[0006] As an improvement, the main control unit is powered on and connected to a start / stop control relay coil contact group, a contactor coil contact group, and a CAN communication module.

[0007] As an improvement, the lithium battery pack is also equipped with a slave control BMS unit and instruments.

[0008] As an improvement, the individual lithium battery is equipped with communication interfaces CAN-H and CAN-L for installing communication modules. These interfaces are used to feed back the CAN messages of the individual lithium battery to the CAN communication module on the main control unit for information processing and judgment in order to control the operation of the corresponding start-stop control relays. When there is a fault in an individual lithium battery or the battery is low in power, the main control unit controls the corresponding start-stop control relays and the corresponding contactor KM to disconnect in sequence.

[0009] As an improvement, the main control unit is also equipped with a power-on interface KSI, which is electrically connected to the ignition switch on the vehicle.

[0010] As an improvement, the individual lithium battery is provided with pins that are electrically connected to the start / stop control relay.

[0011] Compared with the prior art, this utility model has the following advantages: (1) This utility model forms a network system by connecting multiple individual lithium batteries in parallel. The lithium battery pack and the main control unit are connected by a sampling line. At the same time, the positive terminal of the lithium battery pack is connected to the power control contactor group. With the CAN message communication function on the lithium battery pack and the main control unit, when a single lithium battery fails or has low power, the single lithium battery can be disconnected from the network so that the independent replacement does not affect the normal operation of the lithium battery network. The normal operation of the whole vehicle can still be guaranteed, which greatly improves the continuity of industrial vehicle operation and production efficiency. (2) The single lithium battery in this utility model integrates a communication interface and a separate start-stop control relay. It is also electrically connected to the main control unit and the whole vehicle through a separate contactor to form a modular battery structure. When the standardized single lithium battery fails or has low power, the standardized single lithium battery can be quickly replaced. Only the replaced battery needs to be repaired or charged. The remaining normal standardized lithium batteries continue to power the whole vehicle. There is no need to repair or replace the lithium battery pack, which reduces the cost of manpower and material resources when maintaining the battery. When the battery box of the vehicle is changed, it can still be flexibly adapted by adding or subtracting the number of modular battery packs, making it more versatile.

[0012] In summary, this utility model has the advantages of modular quick replacement and strong versatility. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a schematic diagram of the components of this utility model; Detailed Implementation The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0015] Example 1 like Figure 1 As shown, this utility model provides a distributed lithium battery networking system for industrial vehicles, including: a main control unit 1, a power control contactor group 2, a start-stop control relay 3, a lithium battery pack 4, a start-stop control relay coil contact group 5, a contactor coil contact group 6, a CAN communication module 7, and a sampling line 8. The main control unit 1 is equipped with a power-on interface KSI, a negative line interface B-, and multiple positive line interfaces LI1-B+, LI2-B+, ..., LIN-B+, and is connected to the start-stop control relay coil contact group 5, the contactor coil contact group 6, and the CAN communication module 7; wherein, the power-on interface KSI is electrically connected to the ignition switch on the vehicle. In this embodiment, the lithium battery pack 4 includes multiple standardized single lithium batteries 41. Preferably, each standardized single lithium battery has the same specifications (including capacity, SOC and voltage), size and shape. A single standardized lithium battery pack includes a standardized single lithium battery and the same BMS, relay and contactor, and is integrated into the network system in a modular structure.

[0016] Multiple individual lithium batteries 41 are connected in parallel. The negative terminal of the lithium battery pack 4 is electrically connected to the negative line interface B- of the main control unit 1 and the negative terminal of the vehicle, respectively. The positive terminal of the lithium battery pack 4 is electrically connected to the positive terminal of the vehicle via the power control contactor group 2. In this embodiment, each individual lithium battery 41 is electrically connected to a start-stop control relay 3. Each individual lithium battery 41 is equipped with a communication interface CAN-H and CAN-L for installing a communication module. This interface is used to feed back its own CAN message to the CAN communication module 7 on the main control unit 1 for information processing and to determine if the individual lithium battery 41 has a fault or low power. If so, the main control unit 1 controls the start-stop control relay 3 to open. The main control unit 1 controls the start-stop control relay 3 configured on the corresponding individual lithium battery 41 to close or open by controlling the start-stop control relay coil contact group 5 on it to be energized or de-energized.

[0017] It should be noted that the lithium battery pack 4 in this embodiment also includes a slave control BMS unit (real-time calculation of SOC) and instruments, which are used to detect whether each individual lithium battery is abnormal, obtain relevant electrical output parameters, external characteristic parameters, etc., and feed back the relevant detection information to the master control unit 1 in real time via CAN messages.

[0018] In this embodiment, the positive and negative line interfaces LI1-B+, LI2-B+, ..., LIN-B+ and B- of the main control unit 1 are electrically connected to the positive and negative terminals of the lithium battery pack 4 through sampling lines, respectively, for collecting CAN message information of the lithium battery pack.

[0019] Example 2 like Figure 1 As shown, components that are the same as or corresponding to those in Embodiment 1 are marked with the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 will be described below. The difference between Embodiment 2 and Embodiment 1 is that the power control contactor group 2 includes contactors KM1, KM2, ..., KMN. The NC terminals of contactors KM1, KM2, ..., KMN are connected in parallel and electrically connected to the positive terminal of the vehicle. The COM terminals of contactors KM1, KM2, ..., KMN are electrically connected to the positive terminal of the corresponding single lithium battery and the positive line interfaces LI1-B+, LI2-B+, ..., LIN-B+ of the main control unit 1, respectively.

[0020] The working principle of this utility model is as follows: In this embodiment, the distributed lithium battery networking system connects N standard modular lithium batteries in parallel via a power control contactor 2. Each individual lithium battery 41 is electrically connected to a start-stop control relay 3. Each individual lithium battery 41 has a communication interface (CAN-H, CAN-L) for installing a communication module. This interface is used to send its CAN messages back to the CAN communication module 7 on the main control unit 1 for information processing. The system then determines whether to continue supplying power, immediately stop supplying power, or stop supplying power after a certain period. This determines the operation of the corresponding start-stop control relay 3. When an individual lithium battery 41 malfunctions or has low charge, the main control unit 1 receives the CAN message information from the individual lithium battery and controls the start-stop control relay 3 to disconnect. The main control unit 1 then disconnects the corresponding power supply after detecting that the individual lithium battery 41 is no longer sending CAN messages or transmitting voltage. By controlling contactor 2, faulty or low-charge single lithium battery cell 41 can be removed. When a new modular single lithium battery cell 41 enters the network system, it connects to the sampling line and simultaneously feeds back its capacity and other information to the main control unit 1 via CAN message. When the main control unit 1 determines that the battery is not in a low-charge state and has no fault, it allows the lithium battery pack to connect to the grid. Subsequently, the main control unit 1 controls the start-stop control relay coil contact group 5 on it to be energized, thereby controlling the start-stop control relay 3 configured for the corresponding single lithium battery cell 41 to be energized, and then controls the corresponding contactor coil group 6 to be energized, thereby controlling the corresponding power control contactor 2 to be energized. At this time, the positive terminal of the lithium battery pack 4 is electrically connected to the positive terminal of the vehicle, and the negative terminal is electrically connected to the negative terminal of the vehicle, thus providing power.

[0021] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A distributed lithium battery networking system for industrial vehicles, characterized in that, include: The system includes a main control unit, a power control contactor group, a start-stop control relay, and a lithium battery pack. The main control unit is equipped with positive and negative line interfaces. The lithium battery pack includes multiple parallel-connected individual lithium batteries. Each individual lithium battery is electrically connected to a start-stop control relay. The positive and negative terminals of the lithium battery pack are electrically connected to the positive and negative line interfaces on the main control unit via sampling lines, respectively. The negative terminals of multiple individual lithium batteries are connected in parallel and electrically connected to the negative terminal of the vehicle. The positive terminal of the lithium battery pack is electrically connected to the positive terminal of the vehicle via the power control contactor group. The COM terminal of the power control contactor group is electrically connected to the positive line interface on the main control unit.

2. The distributed lithium battery networking system for industrial vehicles according to claim 1, characterized in that, The power control contactor group includes multiple contactors KM. The NC terminals of the multiple contactors KM are connected in parallel and then electrically connected to the positive terminal of the vehicle. The COM terminal of each contactor KM is electrically connected to the positive terminal of the corresponding single lithium battery and the corresponding positive line interface on the main control unit.

3. The distributed lithium battery networking system for industrial vehicles according to claim 1, characterized in that, The main control unit is connected to the start / stop control relay coil contact group, the contactor coil contact group, and the CAN communication module upon power-up.

4. A distributed lithium battery networking system for industrial vehicles according to claim 3, characterized in that, The lithium battery pack is also equipped with a slave control BMS unit and instruments.

5. A distributed lithium battery networking system for industrial vehicles according to claim 4, characterized in that, The individual lithium battery is equipped with communication interfaces CAN-H and CAN-L for installing communication modules. These interfaces are used to feed back the CAN messages of the individual lithium battery to the CAN communication module on the main control unit for information processing and judgment in order to control the operation of the corresponding start-stop control relays. When a single lithium battery fails or has low power, the main control unit controls the corresponding start-stop control relays and the corresponding contactor KM to disconnect in sequence.

6. A distributed lithium battery networking system for industrial vehicles according to claim 1, characterized in that, The main control unit is also equipped with a power-on interface KSI, which is electrically connected to the ignition switch on the vehicle.

7. A distributed lithium battery networking system for industrial vehicles according to claim 1, characterized in that, The individual lithium battery has pins that are electrically connected to the start / stop control relay.

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